Zeiss Epiplan 10x 0.2 NA 0.15 Infinity/1.5 Objective Optical Tube 20 92-9902

Zeiss Epiplan 10x 0.2 NA 0.15 Infinity/1.5 Objective Optical Tube 20 92-9902

The Zeiss Epiplan 10x/0.2 NA is a reflected-light (epi-illumination) microscope objective designed for incident-light inspection of opaque specimens — surfaces, semiconductors, metals, and materials that cannot be viewed in transmitted light. This example is mounted in a black anodized optical tube housing assembly that includes an integrated beamsplitter cube, providing a self-contained reflected-light optical path. The objective is marked "Zeiss West Germany" and carries part number 20 92-9902, identifying it as a genuine Carl Zeiss product from the West Germany manufacturing era.

Specifications & What's Included

• Brand: Carl Zeiss (West Germany)
• Series: Epiplan (reflected-light / epi-illumination objective)
• Magnification: 10x
• Numerical Aperture (NA): 0.2
• Working Distance: 0.15 mm
• Optical System: Infinity/1.5 (infinity-corrected, tube lens factor 1.5)
• Part Number: 20 92-9902
• Objective lens element: clean and clear, no visible haze or damage
• Housing: black anodized aluminum optical tube with integrated beamsplitter/cube housing
• Set screws present on tube barrel
• Includes: objective mounted in optical tube and cube housing assembly

Applications

Epiplan objectives are the standard choice for reflected-light (incident-light) microscopy, where the illumination travels down through the objective and reflects off the specimen surface. This makes them essential for inspecting opaque samples such as semiconductor wafers, integrated circuits, PCB traces, metallurgical cross-sections, ceramic surfaces, and other materials science specimens. The 10x magnification with 0.2 NA provides a useful mid-range field of view for surface surveys before stepping up to higher-power objectives. The infinity/1.5 optical system is compatible with Zeiss Axiovert, Axioplan, Axiophot, and related Zeiss infinity-corrected microscope platforms from the same era. The integrated optical tube and beamsplitter cube assembly suggests this was part of a custom or semi-custom reflected-light inspection setup — common in semiconductor fabrication, quality control labs, and research environments from the 1980s and 1990s, when Zeiss West Germany optics were widely deployed in high-precision industrial and academic settings.