Germanium Windows
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Download Optics for CO2-Lasers Datasheet (PDF, 198 KB) |
Specifications:
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1.
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Material: | optical grade monocrystalline Ge |
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2.
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Clear aperture: | > 90% of a size |
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3.
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Diameter (width & length) tolerances, mm: | +0.0 / -0.1 |
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4.
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Thickness tolerance, mm: | +/- 0.1 |
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5.
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Parallelism, arc. min.: | <= 5 |
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6.
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Surface quality, scr/dig: | |
| for parts to 3 in.: | 40/20 | |
| for parts to 8 in.: | 60/40 | |
| for larger parts: | 80/50 | |
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7.
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Surface figure (power-irregularity) @ 633 nm, fringe: | 1 - 1/2 |
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8.
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Coating (residual reflectivity is specified per surface): | |
| AR/AR @ 10.6 µm, %: | < 0.5 | |
| BBAR/BBAR @ 9-11 µm, %: | 2.0 | |
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9.
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Damage threshold: | |
| CW mode, kW/cm2: | 1 |
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