Sorry, this product is no longer offered for sale. It was discontinued on Jun 11, 2025

IR Beamsplitter, Calcium Fluoride, 50.8 mm, 50R/50T Ratio

The CAFBS12 IR Beamsplitter is a 50.8 mm diameter, 2.00 mm thick Calcium Fluoride beamsplitter with 50/50 reflection/transmission ratio optimized for 45° angle of incidence. This beamsplitter is designed for broadband infrared applications covering spectral range from 2 to 8 μm. The back surface of the beamsplitter has a 3 arc minutes wedge to reduce undesired interference effects caused by the back reflections from both surfaces of the optics.

Specifications

Technical Specs

Wavelength Range
2-8 µm
Diameter
50.8 mm
Material
Calcium Fluoride
Coating Second Surface
Uncoated
Angle of Incidence
45°
Reflection
50 ±10%
Transmission
50 ±10%
Surface Flatness
≤2 λ at 632.8 nm over the clear aperture
Surface Quality
60-40 scratch-dig

Diameter Tolerance
+0.00/-0.13 mm
Thickness
2.0 mm
Thickness Tolerance
± 0.13 mm
Parallelism
3 arc minutes
Clear Aperture
> central 85% of diameter
Cleaning
See How to Clean Optics

Wavelength Range
2-8 µm
Diameter
50.8 mm
Material
Calcium Fluoride
Coating Second Surface
Uncoated
Angle of Incidence
45°
Reflection
50 ±10%
Transmission
50 ±10%
Surface Flatness
≤2 λ at 632.8 nm over the clear aperture
Surface Quality
60-40 scratch-dig

Diameter Tolerance
+0.00/-0.13 mm
Thickness
2.0 mm
Thickness Tolerance
± 0.13 mm
Parallelism
3 arc minutes
Clear Aperture
> central 85% of diameter
Cleaning
See How to Clean Optics

Resources & Downloads

Other

CAFBS12 RoHS Certificate(702.8 kB, PDF)

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