Optical Beamsplitters are optical components used to split input light into two separate parts. Beamsplitters are common components in laser or illumination systems. Beamsplitters are also ideal for fluorescence applications, optical interferometry, or life science or semiconductor instrumentation. Light can be split by percentage of overall intensity, wavelength, or polarization state.

Your One-Stop Source for Beamsplitters

From prototype to production, Rainbow Research Optics, Inc. (RROI) manufactures and delivers precision quality beamsplitters for ultraviolet (UV), visible (VIS), and infrared (IR) wavelength ranges.

Check mark symbol Plate, cube, laser line, polarizing, and non-polarizing beamsplitters
Check mark symbol Adhesive free bonding technology
Check mark symbol Fast delivery

Quick find: • Plate BeamsplittersCube BeamsplittersHarmonic SeperatorsDichroic Beamsplitters

STANDARD BEAMSPLITTERS

Customization is available beyond what’s listed. Contact us with your requirements.

Plate Beamsplitters – Non-Polarizing  (part code: NPB)
Substrate: BK7
Surface Figure: λ/10 @ 633 nm
Surface Quality: 10-5 Laser Quality
Standard Diameter: 0.50 in to 3.00 in
Diameter Tolerance: +0.0/-0.20 mm
Standard Thickness: 0.250 in to 0.375
Thickness Tolerance: ±0.25 mm
Rs-Rp, Ts-Tp: < 5%
AR Coating: R < 0.5%
Standard Reflectance: 30% to 50% ± 5%
Standard Wavelengths: 442 nm to 1550 nm
Damage Threshold: 3 J/cm2, 10 ns pulse
Angle of Incidence: 45°
Clear Aperture: > 85% of diameter
Edge Bevel: 0.3 mm face width at 45°
Adhesion and Durability: Per MIL-C-675A
Plate Beamsplitters – Broadband 50:50 (part code: BHB)
Substrate: BK7
Surface Figure: λ/10 @ 633 nm
Surface Quality: 10-5 Laser Quality
Runp: 50% ± 10%
Standard Diameter: 1.0 in to 4.0 in
Diameter Tolerance: +0.0/-0.20 mm
Standard Thickness: .0250 in to 0.500 in
Thickness Tolerance: ±0.25 mm
Wedge: ≤ 3 arcmin.
AR Coating: R < 0.5%
Standard Wavelengths: 458 nm to 1550 nm
Angle of Incidence: 45°
Clear Aperture: > 85% of diameter
Edge Bevel: 0.3 mm face width at 45°
Adhesion and Durability: Per MIL-C-675A
Plate Beamsplitters – High Energy (part code: PRB)
Substrate: UV Fused Silica, CaF2, or Bk7
Surface Figure:
λ/10 @ 633 nm
Surface Quality:
10-5 Laser Quality
Standard Diameter: 
0.50 in to 4.0 in
Diameter Tolerance:
+0.0/-0.20 mm
Standard Thickness:
0.125 in to 0.50 in
Thickness Tolerance:
±0.25 mm
Wedge: 
≤ 3 arcmin.
AR Coating:
R < 0.25%
Reflectance: 10% to 99%
Damage Threshold: > 10 J/cm2, 10 ns pulse
Standard Wavelengths:
193 nm to 2940 nm
Clear Aperture:
> 85% of diameter
Edge Bevel:
0.3 mm face width at 45°
Adhesion and Durability:
Per MIL-C-675A
Cube Beamsplitters – Partially Reflective (part code: PCB)
Substrate: Bk7
Surface Figure:
λ/4 @ 633 nm
Surface Quality:
10-5 Laser Quality
Standard Size:
5.0 mm to 2.0 in
Size Tolerance:
+0.0/-0.20 mm
Beam Deviation: 
≤ 3 arcmin.
AR Coating:
R < 0.25%
Reflectance: 20% to 80%
Damage Threshold: > 100 mJ/cm2, 10 ns pulse
Standard Wavelengths:
488 nm to 1550 nm
Polarization: S, P, UNP
Clear Aperture:
> 85% of diameter
Edge Bevel:
0.3 mm face width at 45°
Adhesion and Durability:
Per MIL-C-675A
Cube Beamsplitters – Non-Polarizing (part code: NCB)
Substrate: Bk7
Surface Figure:
λ/4 @ 633 nm
Surface Quality:
20-10 Laser Quality
Standard Size:
10.0  mm to 2.0 in
Size Tolerance:
+0.0/-0.25 mm
Runp: 50% ± 10%
Rs-Rp, Ts-Tp:
< 5%
AR Coating:
R < 0.25%
Damage Threshold: > 1 J/cm2, 10 nsec pulse
Standard Wavelengths:
413 nm to 1550 nm
Clear Aperture:
> 85% of diameter
Edge Bevel:
0.3 mm face width at 45°
Adhesion and Durability:
Per MIL-C-675A
Harmonic Separators – High Energy (part code: HHS)
Substrate: UV Fused Silica or BK7
Surface Figure:
λ/10 @ 633 nm
Surface Quality:
10-5 Laser Quality
Standard Diameter:
0.5 in to 2.0 in
Diameter Tolerance:
+0.0/-0.25 mm
Standard Thickness: 0.25 in to 0.375 in
Thickness Tolerance: ± 0.25 mm
Runp: > 99.5%
Tunp: > 90.0%
Damage Threshold: > 5 J/cm2, 10 nsec pulse
Standard Wavelengths (nm): 
266, 355, 532, and 1064
Clear Aperture:
> 85% of diameter
Edge Bevel:
0.3 mm face width at 45°
Adhesion and Durability:
Per MIL-C-675A
Dichroic Beamsplitters (part code: SWP)
 Substrate: UV Fused Silica or BK7
Surface Figure:
λ/10 @ 633 nm
Surface Quality:
10-5 Laser Quality
Diameter Tolerance:
+0.0/-0.20 mm
Thickness Tolerance: ± 0.25 mm
Wedge: ≤ 3 arcmin.
AR Coating: R < 0.25%
Reflectance: > 99.5%
Avg. Transmission: SWP: Tave > 90%, LWP: Tave > 85%
Damage Threshold: > 5 J/cm2, 10 nsec
Clear Aperture:
> 85% of diameter
Edge Bevel:
0.3 mm face width at 45°
Adhesion and Durability:
Per MIL-C-675A

 Rainbow Research Optics, Inc (RROI) is ISO 9001:2015 Certified and ITAR Registered