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Metallized Mirrors, Square & Rectangular
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Large cross-sections at 45 degree angle of incidence
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Aluminum overcoated with MgF2 for high durability
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Easy for OEM mounting
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Available with λ/4, λ/10, and λ/20 surface flatness
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Synthetic Fused Silica available for high thermal stability
These square and rectangular metallized mirrors are identical to the round metallized mirrors described on the preceding three pages. The rectangular shapes are useful at 45 degrees since they present a more nearly square cross section to the beam.
As with the round metallized mirrors there are three levels of flatness available: λ/4, λ/10 and λ/20. The λ/20 mirrors have a synthetic quartz substrate for thermal stability.
A selection of sizes are offered as standard. Other sizes can be supplied on request. Please call. Mirrors up to 1 inch square have a ground rear surface but all other mirrors are polished on the rear face.
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| Dimensions a x b (mm) | Thickness (mm) | Material | Wavelength Range (nm) | Reflectance (%) | Angle of Incidence ( ) | Flatness | Surface Quality | Parallelism tolerance | Clear Aperture | Dimensions tolerance | Thickness tolerance | Laser Damage Threshold | Bevel | Angle of Incidence (°) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 12.7 x 12.7 | 3.0 | BK7 | 350-2000 | ≥88.0 avg | - | λ/4 | 40 - 20 | ≤ 3arcmin | ≥ 90% | +0, -0.1mm | ±0.1mm | 0.4J/cm2 @532 10ns pulse | 0.2mm x 45° typical | 45 |
| 20.0 x 20.0 | 5.0 | BK7 | 350-2000 | ≥88.0 avg | - | λ/4 | 40 - 20 | ≤ 3arcmin | ≥ 90% | +0, -0.1mm | ±0.1mm | 0.4J/cm2 @532 10ns pulse | 0.2mm x 45° typical | 45 |
| 25.0 x 25.0 | 5.0 | BK7 | 350-2000 | ≥88.0 avg | - | λ/4 | 40 - 20 | ≤ 3arcmin | ≥ 90% | +0, -0.1mm | ±0.1mm | 0.4J/cm2 @532 10ns pulse | 0.2mm x 45° typical | 45 |
| 30.0 x 30.0 | 5.0 | BK7 | 350-2000 | ≥88.0 avg | - | λ/4 | 40 - 20 | ≤ 3arcmin | ≥ 90% | +0, -0.1mm | ±0.1mm | 0.4J/cm2 @532 10ns pulse | 0.2mm x 45° typical | 45 |
| 40.0 x 40.0 | 6.0 | BK7 | 350-2000 | ≥88.0 avg | - | λ/4 | 40 - 20 | ≤ 3arcmin | ≥ 90% | +0, -0.1mm | ±0.1mm | 0.4J/cm2 @532 10ns pulse | 0.2mm x 45° typical | 45 |
| 50.0 x 50.0 | 8.0 | BK7 | 350-2000 | ≥88.0 avg | - | λ/4 | 40 - 20 | ≤ 3arcmin | ≥ 90% | +0, -0.1mm | ±0.1mm | 0.4J/cm2 @532 10ns pulse | 0.2mm x 45° typical | 45 |
| 100.0 x 100.0 | 15.0 | BK7 | 350-2000 | ≥88.0 avg | - | λ/4 | 40 - 20 | ≤ 3arcmin | ≥ 90% | +0, -0.2mm | ±0.1mm | 0.4J/cm2 @532 10ns pulse | 0.2mm x 45° typical | 45 |
| 10.0 x 10.0 | 5.0 | BK7 | 350-2000 | ≥88.0 avg | - | λ/10 | 40 - 20 | ≤ 3arcmin | ≥ 90% | +0, -0.1mm | ±0.1mm | 0.4J/cm2 @532 10ns pulse | 0.2mm x 45° typical | 45 |
| 10.0 x 10.0 | 3.0 | BK7 | 350-2000 | ≥88.0 avg | - | λ/10 | 40 - 20 | ≤ 3arcmin | ≥ 90% | +0, -0.1mm | ±0.1mm | 0.4J/cm2 @532 10ns pulse | 0.2mm x 45° typical | 45 |
| 12.7 x 12.7 | 3.0 | BK7 | 350-2000 | ≥88.0 avg | - | λ/10 | 40 - 20 | ≤ 3arcmin | ≥ 90% | +0, -0.1mm | ±0.1mm | 0.4J/cm2 @532 10ns pulse | 0.2mm x 45° typical | 45 |