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Material:
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N-BK7, Fused Silica,N-SF10, CaF2 etc.
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Diameter Tolerance:
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+0.0/-0.15mm (General), +0.0/-0.02mm (High Precision)
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Focal Length Tolerance (mm):
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+/-2%
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Centration:
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<3 arc minutes
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Clear Aperture:
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>80% (Small Size), >95% (Large Size)
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Surface Figure X (per 25mm@632.8nm)
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λ/2 (General), λ/4 (High Precision)
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Surface Figure Y (per 25mm@632.8nm)
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2λ (General), λ (High Precision)
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Surface Quality:
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60/40 (General), 10/5 (High Precision)
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Protected Bevel:
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<0.25mmx45deg
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Coating:
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Upon request
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