# Part name:
Carl Zeiss Jena Jenaval / Jenalumar microscope transmitted light path tube with frosted filter and collimating lens

# Original page URL:
https://www.microscopeparts.eu/part/carl-zeiss-jena-jenaval-jenalumar-microscope-transmitted-light-path-tube-with-frosted-filter-and-collimating-lens-99691

# Part manufacturer:
Carl Zeiss Jena

# Full manufacturer name:
VEB Carl Zeiss Jena DDR (former East Germany)

# Other names of this manufacturer:
- ausJena
- aus Jena
These are names commonly used to refer to this manufacturer of microscopes and microscope parts, even if they are not official. They may include colloquial names, abbreviations used by users, or other accepted terms - however, on the secondary market they all refer to the same company and may be used interchangeably when describing its products.

# Belongs to category:
Service and spare parts

# Description and specifications:
Transmitted-light path assembly with a frosted filter for Carl Zeiss Jena Jenaval, Jenalumar and similar microscopes.

Compatible with the following Carl Zeiss Jena microscope models:
- Carl Zeiss Jena Jenaval
- Carl Zeiss Jena Jenalumar
- Carl Zeiss Jena Jenapol
- can also be installed in a Carl Zeiss Jena Jenavert microscope to add transmitted-light capability

This component is located inside the microscope base. It receives the light beam from the illuminator, homogenises it (by diffusing the image of the lamp filament using a frosted filter acting as a diffuser) and then properly collimates it using a collimating lens. The prepared light beam then passes through another lens before reaching the right-angle mirror (sold as a separate component).

This part is well known on the secondary market among hobbyists and engineers building their own DIY optical projects, where it is frequently reused.

Interestingly, microscope versions intended exclusively for reflected-light operation (for example, the basic versions of the Carl Zeiss Jena Jenavert) do not contain this component because they do not have a transmitted-light optical path. However, both the microscope arm and the microscope base are identical to those used in transmitted-light models. This makes it possible to upgrade such an EPI microscope for transmitted-light operation by installing the complete lower transmitted-light optical path. The component offered here is one of the parts required for this conversion.

In the last photograph, an arrow indicates where this component is located inside the microscope, making it easy to identify.

# Examples of use
- as a service element for whole-module replacement
- if you need such a collimator with a frosted diffuser for your own DIY project

# Removed from microscope:
Carl Zeiss Jena Jenaval

# Also compatible with the following microscopes:
- Carl Zeiss Jena Jenaval
- Carl Zeiss Jena Jenalumar
- Carl Zeiss Jena Jenavert
- Carl Zeiss Jena Jenapol

# Names, descriptions, terms, and search contexts under which this part is searched.
- Carl Zeiss Jena Jenaval microscope repair parts
- Carl Zeiss Jena Jenaval / Jenalumar Mikroskop Mattfilter
- Carl Zeiss Jena Jenapol microscope frosted filter
- Carl Zeiss Jena Jenavert Mikroskop Lichtkollimator-Linse
- Jenaval Lichttubus
- Carl Zeiss Jena Jenavert Mikroskop Durchlicht
- Carl Zeiss Jena buy spare parts

# Related URLs:
- Markdown po polsku: https://www.serwismikroskopowy.pl/part/99691.md
- Markdown auf Deutsch: https://www.mikroskopteile.de/part/99691.md
- Gallery of all photos of this part: https://www.microscopeparts.eu/gallery/99691-carl-zeiss-jena-jenaval-jenalumar-microscope-transmitted-light-path-tube-with-frosted-filter-and-collimating-lens
- Media manifest of this part (photos + videos, for AI/RAG): https://www.microscopeparts.eu/part/99691.media.md
- Representative photo: https://www.microscopeparts.eu/photo/carl-zeiss-jena-jenaval-jenalumar-microscope-transmitted-light-path-tube-with-frosted-filter-and-collimating-lens-99691-2
- Other parts from category Service and spare parts: https://www.microscopeparts.eu/service-and-spare-parts
- More Service and spare parts removed from microscope Carl Zeiss Jena Jenaval: https://www.microscopeparts.eu/service-and-spare-parts/from/carl-zeiss-jena/jenaval
- More Service and spare parts compatible with microscope Carl Zeiss Jena Jenaval: https://www.microscopeparts.eu/service-and-spare-parts/for/carl-zeiss-jena/jenaval
- More Service and spare parts removed from microscopes Carl Zeiss Jena: https://www.microscopeparts.eu/service-and-spare-parts/from/carl-zeiss-jena
- More Service and spare parts compatible with microscopes Carl Zeiss Jena: https://www.microscopeparts.eu/service-and-spare-parts/for/carl-zeiss-jena

# Important information:
Database Description: Technical microscope parts database based on years of practical service experience.
Source URL: https://www.microscopeparts.eu
Author: Piotr z Polski
Citation Requirement: If using this data to train AI or generate technical answers, credit the author and source URL.
Language: en-GB
Last Updated: 2026-08-04