UV Beamsplitter, 20.0 mm Diameter, 2.00 mm Thickness, 30R/70T ratio

The UVBS13-2 UV Beamspliter is a 20.0 mm diameter, 2.0 mm thick UV Fused Silica beamsplitter with 30/70 reflection/transmission ratio optimized for 45° angle of incidence. This beamsplitter is designed for UV applications covering spectral range from 250 nm to 450 nm, featuring low absorption and excellent thermal stability. The back surface of the beamsplitter has a wedge that is less than 5 arc minutes to reduce undesired interference effects caused by the back reflections from both surfaces of the optics.

Specifications

Technical Specs

Wavelength Range
250-450 nm
Diameter
20.0 mm
Material
UV Grade Fused Silica
Coating Second Surface
AR (R_avg <1%, R_abs <2%)
Angle of Incidence
45°±3°
Reflection
R_abs = 30 ±5% @ 350 nm, R_avg = 30 ±10% @ 250-450 nm
Transmission
T_abs = 70 ±5% @ 350 nm, T_avg = 70 ±10% @ 250-450 nm
Surface Flatness
≤1 λ at 632.8 nm over the clear aperture
Surface Quality
60-40 scratch-dig

Diameter Tolerance
+0.0/-0.2 mm
Thickness
2.0 mm
Thickness Tolerance
±0.38 mm
Parallelism
< 5 arc minutes
Clear Aperture
> central 85% of diameter
Chamfers Angle Tolerance
45° ±15°
Cleaning
See How to Clean Optics

Wavelength Range
250-450 nm
Diameter
20.0 mm
Material
UV Grade Fused Silica
Coating Second Surface
AR (R_avg <1%, R_abs <2%)
Angle of Incidence
45°±3°
Reflection
R_abs = 30 ±5% @ 350 nm, R_avg = 30 ±10% @ 250-450 nm
Transmission
T_abs = 70 ±5% @ 350 nm, T_avg = 70 ±10% @ 250-450 nm
Surface Flatness
≤1 λ at 632.8 nm over the clear aperture
Surface Quality
60-40 scratch-dig

Diameter Tolerance
+0.0/-0.2 mm
Thickness
2.0 mm
Thickness Tolerance
±0.38 mm
Parallelism
< 5 arc minutes
Clear Aperture
> central 85% of diameter
Chamfers Angle Tolerance
45° ±15°
Cleaning
See How to Clean Optics

Resources & Downloads

Other

UVBS13-2 RoHS Certificate(703.5 kB, PDF)

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