Beamsplitter Plate

Beamsplitter Plate


Beamsplitter Plates are part-mirrors that reflect part of incident energy and transmit the rest. It can be used with high power laser. When using beamsplitter plates, it is important to bear in mind that the two partial beams travel different optical paths. And the optical paths depend on the incident angle and the thickness of plates.

 Typical Wavelength

Narrow Brand Wavelength: (nm)
488 514.5 532 632.8 635 670
780 850 980 1064 1300 1550
Broad Brand Wavelength: (nm)
450-650 650-850 900-1200 1200-1550

Capability

Common Specification
Material N-BK7
Dimension tolerance ± 0.20 mm
Diameter tolerance +0/-0.2mm
Thickness tolerance ± 0.20 mm
Clear Aperture >85%
Parallelism <1 arc minute
Flatness lambda/4 per 1 inch @632.8nm
Surface quality  S/D 60-40
Bevel 0.2mmx45°
Coating Angle of Incident 45 degree
S1 Surface Dielectric Coating T/R±5%@Wavelength
S2 Surface AR-V coating@wavelength
T=(Ts+Tp)/2, R=(Rs+Rp)/2 
T/R = 90/10, 80/20, 70/30, 75/25, 50/50, 25/75, 30/70, 20/80, 10/90 is available
Part Number Diameter (mm) Thickness (mm) T/R
BSP-BK7-D10.0-3.0T-50:50-1064nm 10.0 3.0 50:50 @1064nm
BSP-BK7-D12.7-3.0T-50:50-1064nm 12.7 3.0 50:50 @1064nm
BSP-BK7-D15.0-3.0T-50:50-1064nm 15.0 3.0 50:50 @1064nm
BSP-BK7-D20.0-3.0T-50:50-1064nm 20.0 3.0 50:50 @1064nm
BSP-BK7-D13.0-4.0T-50:50-650nm 13.0 4.0 50:50 @650nm
BSP-BK7-D15.0-4.0T-50:50-655nm 15.0 4.0 50:50 @655nm
BSP-BK7-D16.0-4.0T-50:50-655nm 16.0 4.0 50:50 @655nm