T-BSW19 - Ø1/2" 50:50 UVFS Plate Beamsplitter, Coating: 250 - 450 nm, t = 3 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
| Damage Threshold Specifications |
| Item |
Damage Threshold |
| 50:50 UVFS Beamsplitters |
4 J/cm2 (355 nm, 10 ns, 10 Hz, Ø0.165 mm) |
| 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 |
| Specification |
Value |
| Split Ratio (R:T) |
50:50 |
| Overall Performance |
Tabs = 50 ± 12%, Rabs = 50 ± 12%, Tabs + Rabs > 99%,
|Ts-Tp| < 40% and |Rs-Rp| < 40%, 45° AOI
|
| Diameter |
1/2" |
| Diameter Tolerance |
+0.0 mm / - 0.2 mm |
| Center Thickness |
3.0 mm |
| Thickness Tolerance |
±0.4 mm |
| Surface Flatness (Peak to Valley) |
λ/10 @ 633 nm |
| Coating on Surface 1 |
250 - 450 nm Beamsplitter Coating for 45° Incidence |
| Coating on Surface 2 |
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 |
>Ø11.43 mm |
| Surface Quality |
20-10 Scratch-Dig |
