| Material | BK7, UVFS |
| Diameter tolerance | +0/-0.1 mm |
| Thickness tolerance | ±0.1 mm |
| Clear aperture | >90 % |
| Surface quality | 40-20 S-D |
| Surface flatness | <λ/8 @ 632.8 nm |
| Protective chamfers | <0,25 mm x 45° |
| Laser damage threshold |
Protected Aluminum: >0.25 J/cm² for 10 ns pulses @1064 nm Protected Silver: >1.8 J/cm² for 10 ns pulses @1064 nm |
ALTECHNA offers gold, silver, aluminum, chrome and copper metallic high reflection and partial reflection coated optics. For coatings properties please refer to COATINGS SECTION
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| Protected Gold provides excellent, broadband infrared high reflectance |
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| Protected Silver provides higher reflectance than aluminum throughout the visible and near IR |
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| Protected Aluminum is economical solution for VIS applications |
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| UV enhanced Aluminum provides good reflectance over a wide range and are mainly used in UV applications |