This is description of this part:
Carl Zeiss blue matt microscope filter
Basic parameters of this microscope filter:
Manufacturer: Carl Zeiss West Germany
Name: Blauglas matt
Manufacturer catalogue number: 46 78 36 (also written as 467836)
Colour: blue matt
Diameter: 32 mm
Material: glass
This is a filter that combines the functions of a blue filter and a ground glass diffuser:
- the blue filter is used to convert the yellow, warm light of the bulb into light closer to white light
- the matt filter (called a diffuser or ground glass) is used to even out the light across the whole area of the specimen and to remove the visible filament of the bulb
This does, however, have one consequence: without a visible filament it is not possible to work with illumination set up according to the Koehler method - and Zeiss mentions this in the leaflet supplied with the filter.
Very often only one or two microscope filters can be fitted in a microscope, for example one on the illuminator and the second in the holder below the condenser. The fact that the glass filter offered here is a 2-in-1 solution makes it possible to save the possible second slot for another filter.
The diameter of 32 mm is a standard with many manufacturers, which means this filter can be used with microscopes of numerous brands. The "compatibility" section lists over a dozen such microscopes, but it is not a complete list.
What is this part needed for?
- if you need exactly this Zeiss filter P/N 467836 because you know its characteristics
- if you have a microscope with bulb illumination and want to shift the colour of the light closer to white
- if you already use a blue filter and a matt filter and would like to have both in a single piece of glass
