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.

This microscope element is responsible for precise (fine / micro) focusing of the microscopic specimen image.

Mechanically, this module is located between the holder to which the microscope stage is attached and the main focusing block with the focusing knobs. Thanks to this, it transfers the rotational movement of the fine focus control into the vertical movement of the microscope stage.

It is worth noting that in the Wild Heerbrugg M20 microscope this mechanism is based on two planes moving on linear guides with bearing balls, rather than on a gear system as used in most microscopes. However, the method of lifting the entire mechanism using a pin is similar to that found in microscopes such as the Lomo MBI-1 or Carl Zeiss Jena Lg.

Description of this part for the microscope.

contains:
- the coarse focus knob (macro movement), which transfers rotational movement to the rack gear (available separately)
- the fine focus knob, which transfers rotational movement to the bearing-based precision mechanism (available separately)

In the last photos in the gallery I indicate with an arrow exactly which microscope element this is and where it is located inside the microscope.

Description of this part for the microscope.

This is a microscope stand element with several functions:
- the microscope head is mounted onto it from the top
- it has a spring locking screw for securing the microscope head
- on the underside it has mounting rails onto which the objective revolver is slid

In the last photos in the gallery I indicate with an arrow exactly which element it is and where it is located in the microscope.

Description of this part for the microscope.

rotational movement of the knobs (control knobs) into vertical movement raising and lowering the microscope arm.
Important distinction: in the Wild Heerbrugg M20 microscope, coarse focusing is achieved by movement of the microscope arm, while precise focusing is achieved by movement of the stage on which the microscope slide with the specimen is placed.

Mechanically, this rack gear is mounted exactly between the block with the knobs and the microscope arm.

Description of this part for the microscope.

movement of the microscope stage and condenser.

The module consists of the following elements:
- stage support, i.e. the plane to which the microscope stage is attached with four screws
- condenser holder clamp, allowing the installation of a condenser with a diameter of 39.5 mm
- condenser fixing screw
- double-sided knob (focus knob) for adjusting the condenser height with a geared shaft
- rack gear (so-called rack) for vertical travel of the condenser holder

On the last photo, an arrow indicates which element it is and where it is located in the microscope to clearly identify this part.

Description of this part for the microscope.

17
Magnification: 40x
Correction: Achromat
Numerical aperture: 0.65
Tube length: 160 mm
Focal length: 33 mm
Cover glass: yes, 0.17 mm thickness
Immersion: no (dry objective)
Thread: RMS

It can be used with any microscope from any manufacturer. Of course, the microscope must be compatible, meaning it must support RMS objectives with TL=160 mm and FL=33 mm. After installing a 12 mm adapter, this objective can of course also be used in microscopes designed for FL=45 mm.

The fact that this objective has FL = 33 mm (meaning it is a so-called short objective) 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.

allows both standard front-back and left-right movement using the adjustment screw and control knob, as well as smooth manual sliding by hand (clearly visible in the attached video).

This stage is mounted to the Wild M20 microscope in the same way as a standard XY stage, using screws.

Note - this stage may have either an opaque metal insert plate or a transparent glass insert in the center (if transmitted illumination from below is required). The example presented here has NO insert installed.

Description of this part for the microscope.

20x
Correction: Fluotar (other names: Fluor and fluorite)
Numerical aperture N.A.: 0.60
Tube length: 160 mm
Parfocal length: 33 mm
Cover glass: yes, 0.17 mm thick
Immersion: no (dry objective)
Thread: RMS

The objective comes in its original protective case marked "Wild Heerbrugg Switzerland".

Fluotar is the name Wild Heerbrugg used for its fluorite objectives, i.e. semi-apochromats - their lenses contain fluorite or glass with similar optical properties. A standard achromat corrects chromatic errors for only two colors (red and blue), so colored fringes may appear along the edges of objects. An apochromat corrects for three colors (red, green and blue) and represents the highest class of correction. The Fluotar sits between them - colored fringes are clearly smaller than with an achromat, although the correction is not as complete as with an apochromat. Fluorite also transmits ultraviolet light well, which is why objectives of this type were used in fluorescence microscopy.

This is a so-called "short barrel" objective with a parfocal length of 33 mm. It is very common to mount this objective on a 12 mm extension, which allows it to be used in microscopes that require 45 mm parfocal objectives. Professional adapters with protective optics, metal adapters and popular DIY 3D-printed adapters all work well for this.

This objective fits practically any microscope from any manufacturer, as long as it has an RMS thread and accepts objectives with TL=160 mm and a parfocal length of 33 mm (or 37 / 45 mm with a suitable adapter). Several example microscopes are listed in the "compatibility" section, but the list is not complete.