

Non-Polarizing Plate Beamsplitters, UV Fused Silica, Rectangular 36.0 mm×25.0 mm×1.0 mm BS2R91-B
BS2R91-BDesign Tools
Non-Polarizing Plate Beamsplitters, UV Fused Silica, Rectangular 36.0 mm×25.0 mm×1.0 mm — Model BS2R91-B
Operating wavelength 700 nm-1100 nm, substrate UV Fused Silica.
Product Description
- Optical material: UV Fused Silica
- Operating wavelength: 400 nm-700 nm, 700 nm-1100 nm, 1100 nm-1650 nm
- Applications: beam splitting, beam combining
LBTEK's Non-Polarizing Plate Beamplitters are coated with a dielectric beamsplittier coating on one side and an anti-reflection coating on the other. When a light beam is incident on the beamsplitter coating surface at an angle of 45°, different splitting ratios can be achieved. Currently, five splitting ratios are available: 10:90, 30:70, 50:50, 70:30, and 90:10. The anti-reflection coating options include 400 nm-700 nm, 700 nm-1100 nm, and 1100 nm-1650 nm. The backside is coated with an anti-reflection coating to reduce reflections (ghost images). For applications sensitive to such phenomena, please consider using non-polarizing beamsplitter cubes. LBTEK also offers customization services for plate beamsplitters with other materials, sizes, and coating systems. If needed, please contact the technical support.
Non-Polarizing Plate Beamsplitters, UV Fused Silica, Rectangular 36.0 mm×25.0 mm×1.0 mm
- Optical material: UV fused silica
- Dimensions: 36.0 mm×25.0 mm×1.0 mm
- Applications: beam splitting, beam combining
The LBTEK Rectangular Non-Polarizing Plate Beamsplitter measures 36.0 mm × 25.0 mm × 1.0 mm, with one side coated with a dielectric beamsplitter coating and the other side coated with an anti-reflection coating. When the light beam is incident on the beamsplitting surface at an agle of 45°, different splitting ratios can be obtained. The back side is coated with an anti-reflection coating to reduce back reflections (ghost images). For applications sensitive to ghosting, please consider using a non-polarizing beamsplitter cube. The splitting ratio accuracy is sensitive to the polarization state of the incident light. Please refer to the pages of performance curves for details.
| Material | UV Fused Silica |
| Size | 36.0 mm×25.0 mm×1.0 mm |
| Dimensional tolerance | ±0.20 mm |
| Clear Aperture | 90% CA |
| Thickness Tolerance | ±0.05 mm |
| Operating Wavelength | 700 nm-1100 nm |
| Coating | Anti-Reflection (AR) Coating,Beam Splitter Coating |
| AR Coating Reflectance | Ravg<1%(45°AOI) |
| Beam Splitter Performance | Tabs = 10 ± 8%, Rabs = 90 ± 8%, Tabs + Rabs > 99%, |Ts - Tp| < 35%, |Rs - Rp| < 35% (45°AOI) |
| Splitting Ratio | 90:10 (R:T) |
| Surface Quality (Scratch/Dig) | 40/20 |
| Transmitted Wavefront Error (TWE) (@633 nm) | λ/2 |
| Damage Threshold | 0.46J/cm2@780nm,120fs,100Hz,Ø13.32μm (100 Pulses) |






