Non-Polarizing Plate Beamsplitter, Operating Wavelength Band: 250-450 nm OSB2555-T1
JCOPTIX plate beamsplitters suit 45° incidence and randomly polarized light. A front dielectric splitting coating and rear antireflection coating are designed for the operating band. A 30 arcmin rear wedge on circular versions redirects rear reflections to minimize interference ghosts. UV fused silica is extremely pure synthetic amorphous silicon dioxide with maximum transmission from 195 to 2100 nm. This colorless glass combines very low thermal expansion and good optics, excellent UV transmission, no UV fluorescence, and radiation resistance. Compared with glasses such as N-BK7, it has lower refractive index at certain wavelengths, lower thermal expansion, and better homogeneity, suiting deep-UV applications requiring greater transmission than N-BK7. JCOPTIX offers circular or rectangular plates with a 50:50 (R:T) ratio. Contact technical support for custom dimensions or splitting ratios.
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Overview
Specifications
| Parameter | Value |
|---|---|
| Optical element material | UV Fused Silica |
| Operating Wavelength | 250-450 nm |
| Split Ratio [R:T] | 50:50 (R:T) |
| Dimensions | Ø25.4 mm |
| Clear Aperture Dimension | >90% of Diameter |
| Dimensional Tolerance | +0.0/-0.2 mm |
| Thickness | 5.0 mm |
| Thickness Tolerance | ± 0.20 mm |
| Wedge Angle | 30 arcmin |
| Coating | Antireflection coating, beamsplitter coating |
| Antireflection Coating R_abs [Operating Wavelength: 250-450 nm] | R_abs< 1% |
| Beamsplitter coating T_abs / R_abs / Ts / Tp / Rs / Rp [45° AOI; Operating Wavelength: 250-450 nm] | T_abs = 50 ± 12%，R_abs = 50 ± 12%，T_abs + R_abs >99%，|Ts-Tp|< 40%，|Rs-Rp|< 40%，45°AOI |
| Damage Threshold [355 nm, 10 ns, 10 Hz, Ø0.165 mm] | 4 J/cm2 (355 nm, 10 ns, 10 Hz, Ø0.165 mm) |
| Surface Flatness [@633 nm] | λ/6 |
| Surface quality (scratch/dig) | 20/10 |
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Datasheet
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