Chromium Cube Half Mirror / CSCH
Chromium cube half mirrors consist of two right angle prisms. One of them is coated with chromium (Cr) on the hypotenuse face. Half mirror divides input beam to reflectance and transmittance in 1:1. A beamsplitter of R:T=1:1 is called “Half Mirror”.
Common Specifications
| Material | BK7 |  |
|---|---|---|
| Surface Flatness of Substrate | λ/4 | |
| Beam Deviation | ＜5′ | |
| Coating | Hypotenuse surface; Chromium Four surfaces; Multilayer antireflection coating |
|
| Incident Angle | 0° | |
| Transmittance | 28±5%(average with respect to wavelength) | |
| Divergence Ratio (reflectance : transmittance) |
1:1 | |
| Laser Damage Threshold | 0.3J/cm2 (Laser pulse width 10ns, repetition frequency 20Hz) |
|
| Surface Quality (Scratch-Dig) | 40-20 | |
| Clear Aperture | Circle that inscribed in a square of 85% of the dimensions |
| Schematic | Outline Drawing |
|---|---|
 |
 |
| Part Number | Wavelength Range | A=B=C |
|---|---|---|
| CSCH-10-550 | 400 － 700nm | 10mm |
| CSCH-15-550 | 400 － 700nm | 15mm |
| CSCH-20-550 | 400 － 700nm | 20mm |
| CSCH-25-550 | 400 － 700nm | 25mm |
| CSCH-30-550 | 400 － 700nm | 30mm |
| CSCH-40-550 | 400 － 700nm | 40mm |
| CSCH-50-550 | 400 － 700nm | 50mm |
| CSCH-10-800 | 750 － 850nm | 10mm |
| CSCH-15-800 | 750 － 850nm | 15mm |
| CSCH-20-800 | 750 － 850nm | 20mm |
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