K9L(N-BK7) Positive Meniscus Lens

K9L(N-BK7) Positive Meniscus Lens

Regular price $26.00 USD
Regular price Sale price $26.00 USD
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Diameter(mm),Focal length(mm),Coating

Common Specifications

Material K9L or BK7
Surface Flatness < λ/5 @ 633nm
Scratch/Dig < 40/20 (both sides)
Eccentricity ≤ 1arcmin
Focal Length Tolerance < ± 1%
Diameter Tolerance < + 0.00/ - 0.02mm
Thickness Tolerance < ± 0.05
Clear Aperture ≥ 95% of diameter
Coating AR OR BBAR
Diameter Range 5~260mm

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