Home page of the microscope service parts, repair and spare parts online catalog - Sermik-Oplatek Mikroskopservice Dresden f.n.n.Z

Description of this part for the microscope.

condensers have an upper, swing-out lens. When it is in the light path, the condenser offers N.A. 0.9. With the top lens swung out, the condenser works at a low numerical aperture of N.A. 0.16 (values from 0.16 to 0.2 are quoted on the internet). It is exactly this arm that does the swinging, and it is what I offer here: it holds the top lens in its mount above the condenser body and at the same time lets you swing it out of the light path.

In the BH2-SC / U-SC condensers this arm with its mount is a single casting together with the lever the user grips. The whole part is fastened to the condenser housing with a single screw (included). The lens sits in the mount without a thread and is clamped by three screws - you can see it and read its description here: https://www.microscopeparts.eu/part/99924.

The inner diameter of the mount is 23 mm.

Please note: originally there was a rubber sleeve on the small lever, which you grip with your fingers, so that the grip is firmer and the fingers do not slip. It is missing here - it must have been lost somewhere during use. It is a removable, replaceable item. If you have a damaged arm in an old condenser and you are looking for a replacement - do not throw away your old rubber, you can move it over without any trouble.

The working position of the whole arm with the top lens is set by a pair of stops - the small screw on the arm rests against the screw in the body. Thanks to this the lens locks in the same place every time it comes back and does not have to be centred again each time.

This particular part was removed from an Olympus BH2-SC condenser taken out of an Olympus BH-2 BHS microscope.

I could not confirm this, but everything indicates that this arm will also fit the microscope condensers for Olympus BX microscopes:
- Olympus U-SC
- Olympus U-SC-2
- Olympus U-SC3

The microscope condensers listed above are sometimes referred to collectively as:
- Olympus Achromat 0.9 flip-out condenser
- Olympus 0.9 swing-out condenser

Before you decide to use this arm in a condenser other than the one it was removed from - compare its appearance and dimensions carefully.

What goes wrong in this mechanism? Here is an example list of problems that can be solved by replacing the arm:
- the arm wobbles on its axis when the pivot screw is loose or worn
- the lens stops returning to its place when the stop screw has been unscrewed or lost, for example during cleaning
- the lens mount gets damaged when someone tries to force the lens out without undoing the three screws
- the casting cracks when the condenser is dropped - the arm sticks out beyond the outline and takes the impact first

This arm is not a spare part for a microscope. It is a part for repairing or rebuilding the condenser - and that condenser can sit in various microscopes.

When replacing the arm with another one, bear in mind that the stop for the working position sits on the arm itself. A new arm will most probably have to be readjusted with that one screw until the lens sets itself exactly on the axis of the light path.

When the arm is swung out, there is no optics left above the iris diaphragm - only the protective glass cemented into the body remains (https://www.microscopeparts.eu/part/99926). It is what then protects the diaphragm blades (https://www.microscopeparts.eu/part/99927) from dirt falling from the stage.

Here are examples of microscope models in which the condensers that this arm fits are most often used:
- Olympus BH-2: BHS / BHT / BHTU
- Olympus BX: BX40 / BX50 / BX51 / BX60

The most important microscopes used with the condenser models mentioned here are listed in the "compatibility" section, but this is by no means a complete list.

The last photos show the microscope condenser that the arm offered here comes from - and a blue arrow points to the part I am talking about.

A curiosity: it is possible that this part also fits the Meiji MA976 microscope condenser.

Description of this part for the microscope.

condensers have an upper, swing-out lens. When it is in the light path, the condenser offers N.A. 0.9. With the top lens swung out, the condenser works at a low numerical aperture of N.A. 0.16 (values from 0.16 to 0.2 are quoted on the internet). This swing-out lens sits in a mount on the swing arm and is held by three screws. The seating diameter is 23 mm and the seat itself has no thread, unlike for example the top lenses in the Olympus U-UCD condenser.

It is exactly this part that I offer here, that is the top achromatic 0.9 lens for use without immersion oil (dry).

This particular lens was removed from an Olympus BH2-SC condenser taken out of an Olympus BH-2 BHS microscope.

I could not confirm this, but everything indicates that this top lens will also fit the microscope condensers for Olympus BX microscopes:
- Olympus U-SC
- Olympus U-SC-2
- Olympus U-SC3

The microscope condensers listed above are sometimes referred to collectively as:
- Olympus Achromat 0.9 flip-out condenser
- Olympus 0.9 swing-out condenser

Before you decide to use this lens in a condenser other than the one it was removed from - compare their appearance and dimensions carefully.

A note on the appearance of the top lens: sometimes a white protective cap is fitted over the top lens. It is an original Olympus item and it changes how the top lens looks - not only the colour of the mount (from black to white) but also its shape (from a cone to a flatter form). It is still the same lens, not a different, white one.

This top lens is not a spare part for a microscope. It is a part for repairing or rebuilding the condenser - and that condenser can sit in various microscopes.

Here are examples of microscope models in which the condensers that this top lens fits are most often used:
- Olympus BH-2: BHS / BHT / BHTU
- Olympus BX: BX40 / BX50 / BX51 / BX60

The most important microscopes used with the condenser models mentioned here are listed in the "compatibility" section, but this is by no means a complete list.

The last photos show the microscope condenser that the top lens offered here comes from.

A curiosity: it is possible that this part also fits the Meiji MA976 microscope condenser.

Description of this part for the microscope.

SC microscope condensers have an upper, swing-out lens. When it is in the light path, the condenser offers N.A. 0.9. With the top lens swung out, the condenser works at a low numerical aperture of N.A. 0.16 (values from 0.16 to 0.2 are quoted on the internet). In fact such a low N.A. is achieved with the iris diaphragm alone, without any lens at all - but in these condensers Olympus fitted a protective glass (a round glass disc) protecting the diaphragm from dirt that could fall into it from above (for example from the stage) and damage it. This glass is cemented into the conical casting that forms the condenser body.

It is exactly this part that I offer here, that is the protective glass (the so-called zero glass) cemented into its housing.

This particular part was removed from an Olympus BH2-SC condenser taken out of an Olympus BH-2 BHS microscope.

I could not confirm this, but everything indicates that this protective glass will also fit the microscope condensers for Olympus BX microscopes:
- Olympus U-SC
- Olympus U-SC-2
- Olympus U-SC3

The microscope condensers listed above are sometimes referred to collectively as:
- Olympus Achromat 0.9 flip-out condenser
- Olympus 0.9 swing-out condenser

Before you decide to use this glass with its housing to repair a condenser other than the one it was removed from - compare their appearance and dimensions carefully.

This glass is damaged quite often:
- it can get scratched during cleaning
- it can crack due to stress
- it can get broken during unprotected storage or in transit

The glass protecting the diaphragm is not a spare part for a microscope. It is a part for repairing the condenser - and that condenser can sit in various microscopes.

Here are examples of microscope models in which the condensers that this glass fits are most often used:
- Olympus BH-2: BHS / BHT / BHTU
- Olympus BX: BX40 / BX50 / BX51 / BX60

The most important microscopes used with the condenser models mentioned here are listed in the "compatibility" section, but this is by no means a complete list.

The last photos show the microscope condenser that the glass with its mount offered here comes from.

A curiosity: it is possible that this part also fits the Meiji MA976 microscope condenser.

Description of this part for the microscope.

mm
Distance between the pins: 26 mm
How the distance was measured: from the centre of one pin to the centre of the other
How the pins are fitted: one on the underside, the other facing outward
Pin width: 2 mm

These particular blades were removed from an Olympus BH2-SC condenser taken out of an Olympus BH-2 BHS microscope.

I could not confirm this, but everything indicates that these blades will also fit the iris diaphragms in the following microscope condensers for Olympus BX microscopes:
- Olympus U-SC
- Olympus U-SC-2
- Olympus U-SC3

The microscope condensers listed above are sometimes referred to collectively as:
- Olympus Achromat 0.9 flip-out condenser
- Olympus 0.9 swing-out condenser

Before you decide to use these diaphragm blades to repair a condenser other than the one they were removed from - compare their appearance and dimensions carefully.

It is quite possible that Olympus, like many other manufacturers, used the same diaphragm blades in most microscope condensers of that era, for example:
- Olympus U-POC
- Olympus U-PCD
- Olympus U-AAC
- Olympus U-UCD

Damaged iris diaphragm blades are one of the more common faults in microscopes. It usually happens when:
- the grease in the mechanism that opens and closes the diaphragm has dried out and the user tries to force it
- a foreign body gets between the blades (for example a chip of glass from a broken slide)
- the diaphragm is closed too quickly or opened too far

In the BH2-SC / U-SC condensers the iris diaphragm sits inside the condenser housing, it is not a separate part screwed on underneath. It follows that if the iris diaphragm fails you can:
- leave the damaged diaphragm in place and not use the condenser to its full potential
- replace the whole condenser
- repair the diaphragm by replacing the damaged blades

These separate diaphragm blades are not a spare part for a microscope. They are parts for repairing the diaphragm in a microscope condenser - and that condenser can sit in various microscopes.

Here are examples of microscope models in which the condenser models are most often used whose iris diaphragms the blades offered here fit:
- Olympus BH-2: BHS / BHT / BHTU
- Olympus BX: BX40 / BX50 / BX51 / BX60

The most important microscopes used with the condenser models mentioned here are listed in the "compatibility" section, but this is by no means a complete list.

The last photos show the microscope condenser from whose diaphragm the blades offered here were taken.

A curiosity: it is possible that these blades also fit the iris diaphragm of the Meiji MA976 microscope condenser.

Description of this part for the microscope.

adjustment ring fitted, which lets you correct the refractive error of one eye and focus the image properly. It is mounted on the left side of the microscope head, and without certain DIY modifications it cannot be moved to the right side.

This particular tube was removed from an Olympus BH2-BI30 binocular head, but it should also fit, among others, the following microscope heads with tubes for eyepieces of 23.2 mm diameter:
- Olympus BH2-BI30
- Olympus BH2-TR30
- Olympus BH2-TBI
- Olympus BH2-TTR
- Olympus BH2-TET

Before you decide to use it to repair a head other than the one it was removed from, I recommend checking it first with specialists on forums or groups devoted to Olympus microscopes.

This tube with diopter adjustment is not a spare part for the microscope itself. It is a repair part for an Olympus microscope head - and that head can sit on various microscopes, even on instruments from manufacturers other than Olympus. The most important microscopes this head is most often used with are listed in the "compatibility" section, but this is by no means a complete list.

The irreplaceable Carl Hunsinger has written an excellent service manual for the BH2-BI30 microscope head (https://www.alanwood.net/downloads/olympus-bh2-bi30-binocular-head-repair.pdf) and for the BH2-TR30 (https://www.alanwood.net/downloads/olympus-bh2-tr30-trinocular-head-repair-manual.pdf).

Here are the microscope models in which the heads this tube fits are most often used:
- Olympus BH-2 BHS
- Olympus BH-2 BHT
- Olympus BH-2 BHTU
- Olympus IMT-2

A note on the eyepiece tube diameter: the mounting diameter for the eyepieces is 23.2 mm, but some sources state 23 mm or 23.5 mm - that is a rounded measurement, and it is still one and the same tube.

Description of this part for the microscope.

tube. The metal casting - the one with the eyepiece tube that the prism holder is attached to - carries the number AB0304.

This particular prism was removed from an Olympus BH2-BI30 binocular head, but it should also fit, among others, the following microscope heads with eyepiece tubes for eyepieces of 23.2 mm diameter:
- Olympus BH2-BI30
- Olympus BH2-TR30
- Olympus BH2-TBI
- Olympus BH2-TTR
- Olympus BH2-TET

Before you decide to use it to repair a head other than the one it was removed from, I recommend checking it first with specialists on forums or groups devoted to Olympus microscopes.

The prism shown here sits in its original holder, and the whole assembly is attached to the right eyepiece tube (casting AB0304) - and that is exactly what I am offering, as a complete unit.

This prism is not a spare part for the microscope itself. It is a repair part for an Olympus microscope head - and that head can sit on various microscopes, even on instruments from manufacturers other than Olympus. The most important microscopes this head is most often used with are listed in the "compatibility" section, but this is by no means a complete list.

The irreplaceable Carl Hunsinger has written an excellent service manual for the BH2-BI30 microscope head (https://www.alanwood.net/downloads/olympus-bh2-bi30-binocular-head-repair.pdf) and for the BH2-TR30 (https://www.alanwood.net/downloads/olympus-bh2-tr30-trinocular-head-repair-manual.pdf).

Here are the microscope models in which the heads this prism fits are most often used:
- Olympus BH-2 BHS
- Olympus BH-2 BHT
- Olympus BH-2 BHTU
- Olympus IMT-2

A note on the eyepiece tube diameter: the mounting diameter for the eyepieces is 23.2 mm, but some sources state 23 mm or 23.5 mm - that is a rounded measurement, and it is still one and the same tube.

Description of this part for the microscope.

The metal casting - the one with the eyepiece tube that the prism holder is attached to - carries the number AB0303.

This particular prism was removed from an Olympus BH2-BI30 binocular head, but it should also fit, among others, the following microscope heads with eyepiece tubes for eyepieces of 23.2 mm diameter:
- Olympus BH2-BI30
- Olympus BH2-TR30
- Olympus BH2-TBI
- Olympus BH2-TTR
- Olympus BH2-TET

Before you decide to use it to repair a head other than the one it was removed from, I recommend checking it first with specialists on forums or groups devoted to Olympus microscopes.

The prism shown here sits in its original holder, and the whole assembly is attached to the left eyepiece tube (casting AB0303) - and that is exactly what I am offering, as a complete unit.

This prism is not a spare part for the microscope itself. It is a repair part for an Olympus microscope head - and that head can sit on various microscopes, even on instruments from manufacturers other than Olympus. The most important microscopes this head is most often used with are listed in the "compatibility" section, but this is by no means a complete list.

The irreplaceable Carl Hunsinger has written an excellent service manual for the BH2-BI30 microscope head (https://www.alanwood.net/downloads/olympus-bh2-bi30-binocular-head-repair.pdf) and for the BH2-TR30 (https://www.alanwood.net/downloads/olympus-bh2-tr30-trinocular-head-repair-manual.pdf).

Here are the microscope models in which the heads this prism fits are most often used:
- Olympus BH-2 BHS
- Olympus BH-2 BHT
- Olympus BH-2 BHTU
- Olympus IMT-2

A note on the eyepiece tube diameter: the mounting diameter for the eyepieces is 23.2 mm, but some sources state 23 mm or 23.5 mm - that is a rounded measurement, and it is still one and the same tube.

Description of this part for the microscope.

attached from the inside to the dovetail that holds the head on the microscope stand.

Important: this is the prism only - without the cast metal holder the prism is supposed to be glued into.

The irreplaceable Carl Hunsinger has written an excellent service manual for this microscope head: https://www.alanwood.net/downloads/olympus-bh2-bi30-binocular-head-repair.pdf.

This prism is not a spare part for the microscope itself. It is a repair part for the Olympus BH2-BI30 microscope head - and that head can sit on various microscopes, even on instruments from manufacturers other than Olympus. The most important microscopes this head is most often used with are listed in the "compatibility" section, but this is by no means a complete list.

Description of this part for the microscope.

removed from an Olympus U-TR30 trinocular head.

The Olympus U-TR30 / U-TR30-2 photo-trinocular heads are most often used in the following microscopes:
- Olympus CX30 / CX31
- Olympus CX40 / CX41 / CX43
- Olympus BX40 / BX41 / BX43
- Olympus BX50 / BX51 / BX53
- Olympus BX60 / BX61
- Olympus MX40 / MX50
- and probably others

Olympus offers a whole range of tubes with a 42.1 mm mounting diameter, so such mounts are fitted not only to the U-TR30 head.

The female mount for adapters with a 42 mm dovetail (more precisely, according to the manufacturer specification: 42.1 mm) is found, among others, on the following microscope heads and tubes:
- Olympus U-TR30
- Olympus U-TR30-2
- Olympus U-TR30H
- Olympus U-TR30IR
- Olympus U-TR30NIR
- Olympus U-TTR-2
- Olympus U-ETR3
- Olympus U-ETR30
- Olympus U-ETR-4
- Olympus U-SWTR
- Olympus U-SWTR-2
- Olympus U-SWTR-3
- Olympus U-SWETR
- Olympus U-SWETTR-2
- Olympus U-SWETTR-5
- Olympus MX-SWETTR
- Olympus U-CTR30-2
- Olympus U-TRU
- Olympus U-TRUS
- Olympus U-MPH
- Olympus U-TLU
- Olympus SZX-TR30
- Olympus SZX2-TTR
- Olympus SZX2-TTRPT
- and probably others

Important: as of now (2026) the microscope brand "Olympus" has been replaced by "Evident". Evident microscopes (e.g. Evident BX53) still keep the previous standard, so the 42mm mount is also found in products carrying that brand.

Metal, cast or injection-molded parts of Olympus carry their own numbers. This microscope element bears the number AB8980.

Because this is a brittle casting, the mount can crumble, crack or break. The remedy is then to replace the complete head or just this part - fortunately this mount is a separate component, fixed to the head with three screws.

And this implies another important matter: the diameter of the mount is standard, but I cannot guarantee that a mount fixed with exactly three screws fits every one of those heads and tubes, and even if it does - whether their hole spacing is the same in each of those models. The user should check that for himself based on the photos in the gallery.

Where the descriptions quoting a 51 mm diameter come from?
On the website of "Martin Microscope" and in many other descriptions available online, exactly the same (sic!) mount is described as having a diameter of 51 mm. That is the internal diameter of the ring, measured without the seat of the dovetail taper. So the 51 mm at "Martin Microscope" refers to the same mount into which a 42 mm dovetail is inserted.

This is not a part for one specific microscope model. As listed above - such a mount can be found in many heads and tubes, and these in turn in any microscope the user fits them into.

In the "compatibility" section there is an example list of microscopes the U-TR30 head fits, although it is not a complete list.

Description of this part for the microscope.

the following microscopes:
- Olympus CX30 / CX31
- Olympus CX40 / CX41 / CX43
- Olympus BX40 / BX41 / BX43
- Olympus BX50 / BX51 / BX53
- Olympus BX60 / BX61
- and probably others

This is a black housing made of cast metal. Metal, cast or injection-molded parts of Olympus carry their own numbers. This microscope element bears the number AB8931.

Because this is a brittle casting, the housing can crumble, crack or break. The remedy is then to replace the complete head or just this part of the housing.

In the compatibility section you will find an example list of microscopes the U-TR30 fits, although that list is not complete.

Description of this part for the microscope.

parameters of the prism:
Manufacturer: Olympus (Japan)
Marking: Neo 20 Olympus
Serial number: 200318
Supported objectives: Olympus NeoSPlan 20 0.46 ∞/0 f=180 (manufacturer catalog number: 1-LM440) and Olympus NeoSPlan 20 NIC 0.46 ∞/0 f=180 (manufacturer catalog number: 1-LM444)
Male thread: M26
Female thread: M26
Contrast method: Nomarski interference contrast (abbreviation: NIC)
Illumination: a compatible reflected light (EPI) illuminator is required

The prism is housed in a suitably shaped metal casing. On one side there is a male thread, on the other a female thread. Mechanically, the prism is screwed with its male thread into the objective nosepiece - and the Olympus Neo SPlan 20 0.46 ∞/0 f=180 objective is screwed into its female thread.

This prism is essential for reflected light observation using the DIC technique. With this technique, details of the observed surface appear three-dimensional and raised, revealing details that remain invisible in classic reflected light brightfield.

Description of this part for the microscope.

parameters of the prism:
Manufacturer: Olympus (Japan)
Marking: Neo 10 Olympus
Serial number: 200463
Supported objectives: Olympus NeoSPlan 10 0.30 ∞/0 f=180 (manufacturer catalog number: 1-LM430) and Olympus NeoSPlan 10 NIC 0.30 ∞/0 f=180 (manufacturer catalog number: 1-LM434)
Male thread: M26
Female thread: M26
Contrast method: Nomarski interference contrast (abbreviation: NIC)
Illumination: a compatible reflected light (EPI) illuminator is required

The prism is housed in a suitably shaped metal casing. On one side there is a male thread, on the other a female thread. Mechanically, the prism is screwed with its male thread into the objective nosepiece - and the Olympus Neo SPlan 10 0.30 ∞/0 f=180 objective is screwed into its female thread.

This prism is essential for reflected light observation using the DIC technique. With this technique, details of the observed surface appear three-dimensional and raised, revealing details that remain invisible in classic reflected light brightfield.

Description of this part for the microscope.

parameters of the prism:
Manufacturer: Olympus (Japan)
Marking: Neo 5 Olympus
Serial number: 200412
Supported objective: Olympus NeoSPlan 5 0.13 ∞/- f=180 (manufacturer catalog number: 1-LM420) and NeoSPlan 5 NIC 0.13 ∞/- f=180 (manufacturer catalog number: 1-LM424)
Male thread: M26
Female thread: M26
Contrast method: Nomarski interference contrast (abbreviation: NIC)
Illumination: a compatible reflected light (EPI) illuminator is required

The prism is housed in a suitably shaped metal casing. On one side there is a male thread, on the other a female thread. Mechanically, the prism is screwed with its male thread into the objective nosepiece - and the Olympus NeoSPlan 5 0.13 ∞/- f=180 objective is screwed into its female thread.

This prism is essential for reflected light observation using the DIC technique. With this technique, details of the observed surface appear three-dimensional and raised, revealing details that remain invisible in classic reflected light brightfield.

Description of this part for the microscope.

parameters of the prism:
Manufacturer: Olympus (Japan)
Marking: 100 Olympus
Serial number: 201532
Supported objective: Olympus MSPlan 100 0.95 ∞/0 f=180 (manufacturer catalog number: 1-LM544)
Male thread: RMS
Female thread: RMS
Contrast method: Nomarski interference contrast (abbreviation: NIC)
Illumination: a compatible reflected light (EPI) illuminator is required

The prism is housed in a suitably shaped metal casing. On one side there is a male thread, on the other a female thread. Mechanically, the prism is screwed with its male thread into the objective nosepiece - and the Olympus MSPlan 100 0.95 ∞/0 f=180 objective is screwed into its female thread.

This prism is essential for reflected light observation using the DIC technique. With this technique, details of the observed surface appear three-dimensional and raised, revealing details that remain invisible in classic reflected light brightfield.

Description of this part for the microscope.

parameters of the prism:
Manufacturer: Olympus (Japan)
Marking: 10 Olympus
Serial number: 201738
Supported objective: Olympus MSPlan 10 0.30 ∞/- f=180 (manufacturer catalog number: 1-LM530)
Male thread: RMS
Female thread: RMS
Contrast method: Nomarski interference contrast (abbreviation: NIC)
Illumination: a compatible reflected light (EPI) illuminator is required

The prism is housed in a suitably shaped metal casing. On one side there is a male thread, on the other a female thread. Mechanically, the prism is screwed with its male thread into the objective nosepiece - and the Olympus MSPlan 10 0.30 ∞/- f=180 objective is screwed into its female thread.

This prism is essential for reflected light observation using the DIC technique. With this technique, details of the observed surface appear three-dimensional and raised, revealing details that remain invisible in classic reflected light brightfield.

Description of this part for the microscope.

2 microscopes with a reflected light illuminator.

Olympus BH2-NAN-2 analyzer slider:
Slider type: rotatable polarizing analyzer
Rotation: the analyzer rotates within a range of 0-45 degrees
Marking on the slider: Olympus BH2-NAN-2
Model in the manufacturer catalog: BH2NAN2
Dimensions: width 45 mm, thickness: 7.5 mm, overall length: 68.5 mm, length of the inserted part: 48.5 mm
Intended use: for the EPI reflected light illuminator

Olympus polarizer slider:
Slider type: rotatable polarizer
Rotation: the polarizer rotates within a range of 0-360 degrees
Marking on the slider: none
Model in the manufacturer catalog: unknown
Empty position: yes - the polarizer has two positions, one with the polarizing filter and the other empty
Dimensions: width 45 mm, thickness: 6 mm, overall length: 85 mm
Intended use: for the EPI reflected light illuminator
Notes: the absence of any marking on the slider suggests that it is not a pull-out slider, but is permanently mounted in the EPI reflected light illuminator - it can, however, be moved between the empty position and the polarizer position

If you want to use this slider in a different microscope - check the shape and the exact dimensions shown in the photos.

Please note - the commonly used terminology is slightly disordered, and foreign as well as incorrect names are often used. The most common mistake is that the analyzer is called a polarizer - and unfortunately this mistake is so frequent that it has to be taken into account. Here are examples of the names in use:
- polaryzator
- polarisator
- polarizer
- polariser
- filtr polaryzacyjny
- filtr POL
- circular polariser
- CPL Filter
- POL filter
- polarisations Filter
- polarization Filter
- analizator
- analisator
- Analysator
- POL analizer
- polarization analyser

Unfortunately, I do not know the model of the EPI reflected light illuminator these sliders fit. Fortunately, Mr Thomas Woitzik has photos of an Olympus BH2 BHS microscope with exactly this EPI equipment on the pages of his excellent online shop: https://www.mikroskop-online.de/mikroskope/verkauf/gebrauchte-mikroskope/auflichtmikroskope/olympus-bh2-mit-auflicht-hellfeld-auflichtpolarisation-photoausgang-und-durchlichtmoeglichkeit/

Description of this part for the microscope.

1960s, several Japanese companies produced microscopes based on Olympus designs. These included, among others, the following companies:
- Hitos Tokyo
- SWIFT Japan
- Union Optical
- Magna Tokyo
- Tiyoda Tokyo
- Yoshida
- Correct Tokyo
- ASA Tokyo
- ERMA Optical Works Tokyo
- Shimadzu Kalnew (Tokyo)
These eyepieces are an excellent complement to these microscopes.

Description of this part for the microscope.

several functions:
- it protects the electrical components built into the microscope base
- it protects the bulb located inside the microscope base
- it acts as a heat sink, dissipating the heat generated by the bulb

The last photograph in the gallery shows the complete Olympus CHK microscope. An arrow indicates exactly which component this is and where it is located, making it easy to identify correctly.

A large proportion of Olympus CHK microscopes available on the second-hand market are missing this cover. During many years of use, this sheet metal cover had to be removed whenever the bulb was replaced, and it was often never reinstalled afterwards.

Owners solve this problem in various ways, often using thick cardboard or a plastic cover. However, only a metal cover also performs the function of a heat sink.

Description of this part for the microscope.

screw was removed from a Olympus CH microscope, but it will most likely fit most models of the CH series, for example:
- Olympus CHK
- Olympus CHB
- Olympus CK2
- Olympus CH
- Olympus CH-2

Description of this part for the microscope.

Olympus CHK / CH / CH-2 microscope models were supplied with a square stage that does not include an integrated XY mechanical stage for precise specimen movement. Such a mechanism is a separate (optional) accessory mounted to the side of the stage, and this is exactly the accessory shown and offered here.

Basic information:
Item: XY mechanical stage attachment for microscope stage
Manufacturer: Olympus
Manufacturer's descriptive name: Fixed type mechanical stage with right downward coaxial knob for plane stage fixed
For microscope: Olympus CHK
Mounting method: attached to the side of the stage with two screws
Required stage thickness: from 10 mm to 12 mm

Important compatibility information:
Originally, this mechanical stage attachment was used on the Olympus CHK microscope. I have personally also installed it on Olympus CH and Olympus CH-2 microscopes, and it is fully compatible with both models.

If CH and CH-2 microscopes were originally supplied with an XY mechanical stage, they used the Olympus CH-MVR attachment, but this CHK version fits as well.

In addition, this XY mechanism is compatible with other microscopes provided that the stage thickness is between 10 mm and 12 mm. I have personally verified compatibility with the stages of the following microscopes:
- Carl Zeiss Jena Eduval
- Carl Zeiss Jena Laboval-2
- Motic SFC100

The last photographs in the gallery show the complete Olympus CHK microscope. An arrow indicates exactly which component is being offered and where it is located within the microscope. The final photograph also shows an Olympus CH-2 microscope fitted with this XY mechanical stage attachment.

In addition, the video available in the video gallery shows this stage from various angles and demonstrates the movement of all mechanical parts.

At magnifications above 400×, manually moving the microscope slide becomes very difficult. This is exactly why XY mechanical stage attachments are used, allowing the specimen to be moved with great precision at magnifications such as 600× or 1000× using oil immersion.

Description of this part for the microscope.

Mechanically, this lens assembly is located inside the microscope base beneath the condenser. It is secured from below (inside the microscope base) with two screws. The lamp is located inside the microscope base directly beneath this light collector.

This component performs several functions:
- it collimates the light beam
- thanks to the built-in frosted diffuser, it homogenizes the light so that there are no bright or coloured hot spots caused by the lamp filament
- it also serves as the holder for round filters

The last photograph in the gallery shows the complete Olympus CHK microscope. An arrow indicates exactly which component is being offered and where it is located inside the microscope, making identification straightforward.

Description of this part for the microscope.

Length: 33 mm
Cover Glass: 0.17 mm
Immersion: no
Thread: RMS

It can be used with any microscope from any manufacturer. The microscope must be compatible, meaning it supports RMS objectives, TL = 160 mm, FL = 33 mm.

After installing the 12 mm adapter, this objective lens will have FL = 45 mm.

The fact that this objective has FL = 33 mm allows it to be used with microscopes from other manufacturers, including:
- Carl Zeiss Jena Lg
- Carl Zeiss Jena Lumipan
- Lomo Biolam
- Lomo MBB-1A
- PZO MB-10
- Nikon S
- Olympus KHC

Description of this part for the microscope.

Description of this part for the microscope.

This is a part removed from the stand of an Olympus BX40 microscope. It has been tested and cleaned - and is suitable for use as a service element for repairing a damaged microscope. In the manufacturer's catalog this element carries part number AB872900.

Olympus BX series microscopes use identical assemblies in many different models, therefore there is a high probability that this element - although removed from a BX40 model - is also compatible with other BX series models (for example BX41, BX43, BX50, BX51 etc.). However, before deciding to install such an element in an Olympus BX microscope, it is advisable to first carefully compare shapes and dimensions or ask appropriate questions on forums and in Olympus BX microscope user groups.

Description of this part for the microscope.

carrying the "Olympus" logo.

This is a part removed from the stand of an Olympus BX40 microscope. It has been tested and cleaned - and is suitable for use as a service element for repairing a damaged microscope. Many smaller Olympus service elements do not have their own catalog numbers or commercial names, therefore in the last photos in the gallery I indicate with an arrow exactly which element is being offered and where it is located inside the microscope. In this description some names used are descriptive rather than official technical commercial names.

Olympus BX series microscopes use identical assemblies in many different models, therefore there is a high probability that this element - although removed from a BX40 model - is also compatible with other BX series models (for example BX41, BX43, BX50, BX51 etc.). However, before deciding to install such an element in an Olympus BX microscope, it is advisable to first carefully compare shapes and dimensions or ask appropriate questions on forums and in Olympus BX microscope user groups.

Description of this part for the microscope.

light beam are mounted in a metal housing which acts as a heat sink dissipating heat from the halogen bulb. The complete assembly forms the illuminator housing.

This is a part removed from the stand of an Olympus BX40 microscope. It has been tested and cleaned - and is suitable for use as a service element for repairing a damaged microscope. Many smaller Olympus service elements do not have their own catalog numbers or commercial names, therefore in the last photos in the gallery I indicate with an arrow exactly which element is being offered and where it is located inside the microscope. In this description some names used are descriptive rather than official technical commercial names.

Olympus BX series microscopes use identical assemblies in many different models, therefore there is a high probability that this element - although removed from a BX40 model - is also compatible with other BX series models (for example BX41, BX43, BX50, BX51 etc.). However, before deciding to install such an element in an Olympus BX microscope, it is advisable to first carefully compare shapes and dimensions or ask appropriate questions on forums and in Olympus BX microscope user groups.

Description of this part for the microscope.

removed from the stand of an Olympus BX40 microscope. It has been tested and cleaned - and is suitable for use as a service element for repairing a damaged microscope. Many smaller Olympus service elements do not have their own catalog numbers or commercial names, therefore in the last photos in the gallery I indicate with an arrow exactly which element is being offered and where it is located inside the microscope. In this description some names used are descriptive rather than official technical commercial names.

Olympus BX series microscopes use identical assemblies in many different models, therefore there is a high probability that this element - although removed from a BX40 model - is also compatible with other BX series models (for example BX41, BX43, BX50, BX51 etc.). However, before deciding to install such an element in an Olympus BX microscope, it is advisable to first carefully compare shapes and dimensions or ask appropriate questions on forums and in Olympus BX microscope user groups.

Description of this part for the microscope.

stand of an Olympus BX40 microscope. It has been tested and cleaned - and is suitable for use as a service element for repairing a damaged microscope. Many smaller Olympus service elements do not have their own catalog numbers or commercial names, therefore in the last photos in the gallery I indicate with an arrow exactly which element is being offered and where it is located inside the microscope. In this description some names used are descriptive rather than official technical commercial names.

Olympus BX series microscopes use identical assemblies in many different models, therefore there is a high probability that this element - although removed from a BX40 model - is also compatible with other BX series models (for example BX41, BX43, BX50, BX51 etc.). However, before deciding to install such an element in an Olympus BX microscope, it is advisable to first carefully compare shapes and dimensions or ask appropriate questions on forums and in Olympus BX microscope user groups.

Other names are also used for this component:
- focusing mechanism
- coarse and fine focus mechanism
- focus drive
- focus assembly
- focusing unit
- focusing block
- focus block
- focus drive assembly
- focus gear block
- focusing system
- gear block
- focus block
- gear assembly

Description of this part for the microscope.

Both elements (the diaphragm and the control ring) have gears which engage with each other after assembly and work together: rotating the control ring closes or opens the diaphragm blades

This is a part removed from the stand of an Olympus BX40 microscope. It has been tested and cleaned - and is suitable for use as a service element for repairing a damaged microscope. Many smaller Olympus service elements do not have their own catalog numbers or commercial names, therefore in the last photos in the gallery I indicate with an arrow exactly which element is being offered and where it is located inside the microscope. In this description some names used are descriptive rather than official technical commercial names.

Olympus BX series microscopes use identical assemblies in many different models, therefore there is a high probability that this element - although removed from a BX40 model - is also compatible with other BX series models (for example BX41, BX43, BX50, BX51 etc.). However, before deciding to install such an element in an Olympus BX microscope, it is advisable to first carefully compare shapes and dimensions or ask appropriate questions on forums and in Olympus BX microscope user groups.

Description of this part for the microscope.

metal plate which presses these filters against the microscope housing. It consists of a thin frosted filter and a thick filter which, in my opinion, performs light color correction and also absorbs heat from the halogen bulb.

This is a part removed from the stand of an Olympus BX40 microscope. It has been tested and cleaned - and is suitable for use as a service element for repairing a damaged microscope. Many smaller Olympus service elements do not have their own catalog numbers or commercial names, therefore in the last photos in the gallery I indicate with an arrow exactly which element is being offered and where it is located inside the microscope. In this description some names used are descriptive rather than official technical commercial names.

Olympus BX series microscopes use identical assemblies in many different models, therefore there is a high probability that this element - although removed from a BX40 model - is also compatible with other BX series models (for example BX41, BX43, BX50, BX51 etc.). However, before deciding to install such an element in an Olympus BX microscope, it is advisable to first carefully compare shapes and dimensions or ask appropriate questions on forums and in Olympus BX microscope user groups.

Description of this part for the microscope.

stand base) of the microscope (that is transmitted light). On the outside there is a lens that collimates the light and a place where filters are placed. The mirror is in excellent condition - however, in my opinion it is attached in an unusual way. Either the manufacturer used a large amount of adhesive to secure it properly - or somebody did this later during the years of use using a large amount of adhesive. Of course this has no effect on operation - operation is flawless - but I want to point this out.

This is a part removed from the stand of an Olympus BX40 microscope. It has been tested and cleaned - and is suitable for use as a service element for repairing a damaged microscope. Many smaller Olympus service elements do not have their own catalog numbers or commercial names, therefore in the last photos in the gallery I indicate with an arrow exactly which element is being offered and where it is located inside the microscope. In this description some names used are descriptive rather than official technical commercial names.

Olympus BX series microscopes use identical assemblies in many different models, therefore there is a high probability that this element - although removed from a BX40 model - is also compatible with other BX series models (for example BX41, BX43, BX50, BX51 etc.). However, before deciding to install such an element in an Olympus BX microscope, it is advisable to first carefully compare shapes and dimensions or ask appropriate questions on forums and in Olympus BX microscope user groups.

Description of this part for the microscope.

From the outside only the "opening" into which this hex key is inserted is visible, while the entire sleeve (it can be described as a plastic tube acting as a protective cover / guide sleeve) is located inside. And this is exactly the element shown and offered here.

This is a part removed from the stand of an Olympus BX40 microscope. It has been tested and cleaned - and is suitable for use as a service element for repairing a damaged microscope. Many smaller Olympus service elements do not have their own catalog numbers or commercial names, therefore in the last photos in the gallery I indicate with an arrow exactly which element is being offered and where it is located inside the microscope. In this description some names used are descriptive rather than official technical commercial names.

Olympus BX series microscopes use identical assemblies in many different models, therefore there is a high probability that this element - although removed from a BX40 model - is also compatible with other BX series models (for example BX41, BX43, BX50, BX51 etc.). However, before deciding to install such an element in an Olympus BX microscope, it is advisable to first carefully compare shapes and dimensions or ask appropriate questions on forums and in Olympus BX microscope user groups.

Description of this part for the microscope.

microscope. The shaft itself is located inside and is not visible from the outside.

This is a part removed from the stand of an Olympus BX40 microscope. It has been tested and cleaned - and is suitable for use as a service element for repairing a damaged microscope. Many smaller Olympus service elements do not have their own catalog numbers or commercial names, therefore in the last photos in the gallery I indicate with an arrow exactly which element is being offered and where it is located inside the microscope. In this description some names used are descriptive rather than official technical commercial names.

Olympus BX series microscopes use identical assemblies in many different models, therefore there is a high probability that this element - although removed from a BX40 model - is also compatible with other BX series models (for example BX41, BX43, BX50, BX51 etc.). However, before deciding to install such an element in an Olympus BX microscope, it is advisable to first carefully compare shapes and dimensions or ask appropriate questions on forums and in Olympus BX microscope user groups.

Description of this part for the microscope.

microscope stand and is not visible from the outside.

This is a part removed from the stand of an Olympus BX40 microscope. It has been tested and cleaned - and is suitable for use as a service element for repairing a damaged microscope. Many smaller Olympus service elements do not have their own catalog numbers or commercial names, therefore in the last photos in the gallery I indicate with an arrow exactly which element is being offered and where it is located inside the microscope. In this description some names used are descriptive rather than official technical commercial names.

Olympus BX series microscopes use identical assemblies in many different models, therefore there is a high probability that this element - although removed from a BX40 model - is also compatible with other BX series models (for example BX41, BX43, BX50, BX51 etc.). However, before deciding to install such an element in an Olympus BX microscope, it is advisable to first carefully compare shapes and dimensions or ask appropriate questions on forums and in Olympus BX microscope user groups.

Description of this part for the microscope.

Olympus BHM
- but possibly also with others from the BH series

This illuminator allows operation in the following modes:
- EPI-BF (bright field in reflected light)
- EPI-DF (dark field in reflected light)
- EPI POL (polarization after installing a filter)

The set includes the light source (bulb).

Note - originally these illuminators work with Olympus NEO series objectives, but I have seen DIY modifications for standard RMS objectives.

Description of this part for the microscope.

the photo gallery there are detailed photos of this element together with the dimensions.

Description of this part for the microscope.

the photo gallery there are detailed photos of this element together with the dimensions.

Description of this part for the microscope.

the photo gallery there are detailed photos of this element together with the dimensions. Additionally, in the last photo an arrow indicates which element is being referred to and where it is located in the microscope head, in order to clearly identify this part.

Description of this part for the microscope.

the photo gallery there are detailed photos of this element together with the dimensions. Additionally, in the last photo an arrow indicates which element is being referred to and where it is located in the microscope head, in order to clearly identify this part.

Description of this part for the microscope.

the photo gallery there are detailed photos of this element together with the dimensions. Additionally, in the last photo an arrow indicates which element is being referred to and where it is located in the microscope head, in order to clearly identify this part.

Description of this part for the microscope.

the photo gallery there are detailed photos of this element together with the dimensions. Additionally, in the last photo an arrow indicates which element is being referred to and where it is located in the microscope head, in order to clearly identify this part.

Description of this part for the microscope.

the photo gallery there are detailed photos of this element together with the dimensions. Additionally, in the last photo an arrow indicates which element is being referred to and where it is located in the microscope head, in order to clearly identify this part.

Description of this part for the microscope.

the photo gallery there are detailed photos of this element together with the dimensions. Additionally, in the last photo an arrow indicates which element is being referred to and where it is located in the microscope head, in order to clearly identify this part.

Description of this part for the microscope.

the photo gallery there are detailed photos of this element together with the dimensions. Additionally, in the last photo an arrow indicates which element is being referred to and where it is located in the microscope head, in order to clearly identify this part.

Description of this part for the microscope.

the photo gallery there are detailed photos of this element together with the dimensions. Additionally, in the last photo an arrow indicates which element is being referred to and where it is located in the microscope head, in order to clearly identify this part.

Description of this part for the microscope.

the photo gallery there are detailed photos of this element together with the dimensions. Additionally, in the last photo an arrow indicates which element is being referred to and where it is located in the microscope head, in order to clearly identify this part.

Description of this part for the microscope.

attachment - it is a solidly manufactured construction from Olympus Japan, highly sought after on the used microscope market.

Note - if the spacing of the mounting holes matches, this attachment can also be installed on stages from other manufacturers.

Note - Olympus produced specimen holders with fixed clamps as well as models with a spring-loaded clamp. Here I show and offer the spring-loaded version.

In the photos visible in the gallery you can see the exact dimensions of the element described and offered here.

Description of this part for the microscope.

Basic information:
Manufacturer: Olympus
Part number in the manufacturer catalogue: AX-RFS
Type of microscope element: field diaphragm with complete mechanical control mechanism
Compatibility: Olympus Provis AX70 and AX80 microscopes
Information: RFS = Reflected Fluorescence System

The modular construction of Olympus AX microscopes allows easy removal and installation of entire microscope elements, but this is often the reason why microscopes appearing on the secondary market are missing some modules.

This is a relatively complex module containing, apart from the diaphragm itself, knobs, control wheels, rods and mechanical gear transmissions. With improper handling or maintenance - and especially with lack of maintenance - this module may become damaged. The most common failures are:
- bending or breaking of the diaphragm blades
- unscrewing and loss of the diaphragm centering screws
- breaking of the knob used to open / close the diaphragm
- breaking of parts of the rotary motion transmission mechanism

Description of this part for the microscope.

Description of this part for the microscope.

It's very likely that this knob system is also compatible with the Olympus BX51 model and perhaps others. Once I verify this, I'll post the relevant information here (ha, I wonder when?).

Description of this part for the microscope.

darkfield objectives.

Number of ports: 4
Objective thread: M25
Objective type: Olympus NEO
Mounting method: Dovetail

I've also used the Olympus BHM microscope with Carl Zeiss Jena M25 thread objectives (Jenaval microscope objectives), and they fit and work very well :-)

I'm almost certain (but I haven't checked) that this turret fits the Olympus BH model (but not the BH-2), which has a turret for RMS objectives by default. However, it can be swapped out and work with an M25 objective :)

Description of this part for the microscope.

part of the housing. Screws are included. The set includes an ON/OFF switch for mounting in the housing. The set DOES NOT include a light intensity regulator. There is also a plug for the illuminator cable on the back of the housing. The illuminator cable itself is not included.

So-called transformer, "electrics", electric circuit, electronic board.

Description of this part for the microscope.

Description of this part for the microscope.

Description of this part for the microscope.

Description of this part for the microscope.

board.

DL070700 transformer, PIGEON F25 690 Ohm 89.5 potentiometer. The set includes a bulb housing, i.e., the underside of the microscope base. The set includes a V-belt (toothed belt) for the potentiometer.

Description of this part for the microscope.