Broadband Beam Splitter

PRODUCT CATEGORIES

INOUIRY

Broadband spectroscopes are usually used at a 45° tilt, with one side coated with a spectroscope film and the other side coated with an anti-reflection film. They can split the incident light into two parts: reflected light and transmitted light.

The front surface of the spectroscope is coated with a spectroscope film, and the back surface is usually coated with an anti-reflection film to reduce the interference effect between beams and ghost images. Spectroscopes are light in weight, moderately priced, and relatively easy to make. A spectroscope is an optical component that can split a radiation beam into several parts.

We provide various models of broadband spectroscopes with spectroscope films on the front surface and VIS, NIR, and SWIR anti-reflection films on the back surface.

Technical parameters with broadband beamsplitter

Material	Fine annealed H-K9L optical glass
Surface accuracy	λ/2 (per inch) @ 633nm
Parallelism error	<1′
Surface quality	60-40
Effective aperture	90%
Dimension error	+0.0/-0.25mm
Thickness	3mm±0.2mm
Back	Fine grinding
Chamfer	Protective chamfer 0.2~0.5mmX45°
Incident angle	Designed for 45° incident angle
Coating-S1 surface splitter film	Split ratio (R/T) ±10% Average value within nominal bandwidth
Coating-S2 surface anti-reflection film	Ravg<1% Average value within nominal bandwidth

spectral curve with broadband beam splitter

Stock Size Parameters

Size (mm)	Thickness (mm)	Splitting ratio	Coated
12.5	3	20R/80T; 30R/70T; 40R/60T; 50R/50T; 60R/40T; 70R/30T; 80R/20T	VIS; NIR; SWIR
25	3	20R/80T; 30R/70T; 40R/60T; 50R/50T; 60R/40T; 70R/30T; 80R/20T	VIS; NIR; SWIR
50	3	20R/80T; 30R/70T; 40R/60T; 50R/50T; 60R/40T; 70R/30T; 80R/20T	VIS; NIR; SWIR
12.5*17.5	3	20R/80T; 30R/70T; 40R/60T; 50R/50T; 60R/40T; 70R/30T; 80R/20T	VIS; NIR; SWIR
25*36	3	20R/80T; 30R/70T; 40R/60T; 50R/50T; 60R/40T; 70R/30T; 80R/20T	VIS; NIR; SWIR
50*72	3	20R/80T; 30R/70T; 40R/60T; 50R/50T; 60R/40T; 70R/30T; 80R/20T	VIS; NIR; SWIR