双凹透镜
The based function of the lenses is producing diverging light or a virtual image, where the input light is converging.
Specifications
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Item
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Commercial
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High Precision
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Material:
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N-BK7；Fused Silica ；Silicon
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Diameter φ:
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3mm~60mm
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Dimension tolerance:
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±0.1mm
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±0.05mm
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Focus length tolerance:
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±2%@632.8mm
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Surface figure(per 25.4mm)
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λ/4@632.8nm
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λ/10@ 632.8nm
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Surface quality:
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MIL40-20
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Clear aperture:
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85%
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Centration:
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≤3′
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Bevel(face width×45°) :
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0.2~0.4mm or specified by customer
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Coating:
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Specified by customer
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