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Substrate Material: |
Corning 7980 Fused Silica |
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Outer Diameter: |
25.4, -0.2, +0.0mm |
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Configuration: |
Plano-concave polished(double-side polished) |
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Radius of Curvature (ROC): |
-600mm (tolerance +/-0.5%) |
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Reflection Focal Length: |
-300mm(ROC/2) |
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Edge Thickness: |
6.0, +/-0.2mm |
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Clear Aperture: |
>80% of polished surface |
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Surface Accuracy(Concave): |
<Lambda/10 @633nm over clear aperture |
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Concention: |
<3 arc minutes |
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Surface Quality: |
40-20 S/D (concave/coated) |
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Front Surface(Concave): |
Full-dielectric coated on concave surface
R>99.8% for S and P polarization (630-880nm wide angle applicable) for angles of incidence from 0 to 45 deg
R>99.8% @ 620 - 980nm @ 0-deg AOI operation |
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Back Surface: |
Fine polished 40-20 S/D; <lambda/4 over surface; Un-coated |
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Protection Chamfer: |
0.3mm x 45deg |
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Laser Damage Threshold: |
1MW/cm2 CW, 1J/cm2 10ns pulse @ 1064nm |