Chromium Plate Half Mirror / PSCH
Chromium plate half mirrors are plate beamsplitters that are coated with chromium (Cr) on the front surface of optical parallels or wedged substrates.
The other surface is coated with multi-layer anti-reflection.
Common Specifications
| Material | BK7 |  |
|---|---|---|
| Surface Flatness | λ/10 | |
| Coating | Front surface: Chromium Rear surfaces: Multilayer antireflection coating |
|
| Incident Angle | 45° | |
| Transmittance | Average 30±5%(The average value of the P-Polarization and the S-Polarization) | |
| Divergence Ratio (reflectance : transmittance) | 1:1 | |
| Laser Damage Threshold | 0.25J/cm2 (Laser pulse width 10ns, repetition frequency 20Hz) |
|
| Surface Quality (Scratch-Dig) | 40-20 | |
| Clear Aperture | 90% of the diameter |
| Schematic | Outline Drawing |
|---|---|
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| Optical Parallel | Wedged Substrate |
|---|---|
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| Part Number | Wavelength Range | Diameter φD | Thickness t | Parallelism W |
|---|---|---|---|---|
| PSCH-25.4C03-10-550 | 400 － 700nm | φ25.4mm | 3mm | ＜5″ |
| PSCH-30C03-10-550 | 400 － 700nm | φ30mm | 3mm | ＜5″ |
| PSCH-30C05-10W-550 | 400 － 700nm | φ30mm | 5mm | 1°±5′ |
| PSCH-40C04-10-550 | 400 － 700nm | φ40mm | 4mm | ＜5″ |
| PSCH-50C05-10-550 | 400 － 700nm | φ50mm | 5mm | ＜5″ |
| PSCH-50C08-10W-550 | 400 － 700nm | φ50mm | 8mm | 1°±5′ |
| PSCH-60C06-10-550 | 400 － 700nm | φ60mm | 6mm | ＜5″ |
| PSCH-100C10-10-550 | 400 － 700nm | φ100mm | 10mm | ＜5″ |
| PSCH-100C15-10W-550 | 400 － 700nm | φ100mm | 15mm | 1°±5′ |
| PSCH-25.4C03-10-800 | 750 － 800nm | φ25.4mm | 3mm | ＜5″ |
| PSCH-30C03-10-800 | 750 － 800nm | φ30mm | 3mm | ＜5″ |
| PSCH-30C05-10W-800 | 750 － 800nm | φ30mm | 5mm | 1°±5′ |
| PSCH-50C05-10-800 | 750 － 800nm | φ50mm | 5mm | ＜5″ |
| PSCH-50C08-10W-800 | 750 － 800nm | φ50mm | 8mm | 1°±5′ |
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