T-BSW21 - Ø2" 50:50 UVFS Plate Beamsplitter, Coating: 250 - 450 nm, t = 8 mm
T-BSW21 - Ø2" 50:50 UVFS Plate Beamsplitter, Coating: 250 - 450 nm, t = 8 mm
- Beamsplitter Coating on Front Surface: 250 - 450 nm
- Optimized for 50:50 Beamsplitting for a 45° Angle of Incidence (AOI)
- Antireflection (AR) Coating on Back Surface: 250 - 450 nm
- Ø1/2", Ø1", 25 mm x 36 mm, and Ø2" Versions Available
| Specification | Value |
|---|---|
| Split Ratio (R:T) | 50:50 |
| Overall Performancea |
Tabs = 50 ± 12%, Rabs = 50 ± 12%, Tabs + Rabs > 99%, |Ts-Tp| < 40% and |Rs-Rp| < 40%, 45° AOI |
| Diameter | 2" |
| Diameter Tolerance | +0.0 mm / - 0.2 mm |
| Center Thickness | 8.0 mm |
| Thickness Tolerance | ±0.4 mm |
| Surface Flatness (Peak to Valley)b | λ/10 @ 633 nm |
| Coating on Surface 1c | 250 - 450 nm Beamsplitter Coating for 45° Incidence |
| Coating on Surface 2c | Broadband AR Coating for 250 - 450 nm (Ravg < 1.0% within Wavelength Range) |
| Wedge Angle | 30 arcmin |
| Wedge Angle Tolerance | ±10 arcmin |
| Substrate | UV Fused Silica |
| Clear Aperture | >Ø45.72 mm |
| Surface Quality | 20-10 Scratch-Dig |
| Item # | Size | Thickness | Wedge Angle | Split Ratio (R:T) | Overall Performance |
|---|---|---|---|---|---|
| T-BSW19 | Ø1/2" | 3.0 mm | 30 arcmin | 50:50 | Tabs = 50 ± 12%, Rabs = 50 ± 12%, Tabs + Rabs > 99%, |Ts-Tp| < 40% and |Rs-Rp| < 40%, 45° AOI |
| T-BSW20 | Ø1" | 5.0 mm | 30 arcmin | 50:50 | |
| T-BSW20R | 25 mm x 36 mm | 1.0 mm | No Wedge | 50:50 | |
| T-BSW21 | Ø2" | 8.0 mm | 30 arcmin | 50:50 |
| Damage Threshold Specifications | |
|---|---|
| Item | Damage Threshold |
| 50:50 UVFS Beamsplitters | 4 J/cm2 (355 nm, 10 ns, 10 Hz, Ø0.165 mm) |