| 1. | Material: | CVD-ZnSe | | 2. | Effective focal length tolerance, %: | +/- 2 | | 3. | Diameter (width & length) tolerances, mm: | +0.0 / -0.1 | | 4. | Thickness tolerance, mm: | +/- 0.25 | | 5. | Edge thickness variation, mm: | <= 0.05 | | 6. | Clear aperture: | > 85% of a size | | 7. | Surface figure (power-irregularity) @ 633 nm: | | | | plano, fringe: | 1 - 1/2 | | | radiused: | depends on radius | | 8. | Surface quality, scr/dig: | 60/40 | | 9. | AR Coating reflectivity per surface
@ 10.6 µm, %: | < 0.5 |
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