Redshift Chinese laser focus lens
$16.00
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Specification Diameter Tolerance: +0/-0.13mmThickness Tolerance: ±0.25mmFocal Length Tolerance: ±2%Edge Thickness Variation (ETV): ≤3 arc min.Clear Aperture: >90%Surface Flatness: λ/4 per 1″ Dia@632.8nmSurface Quality: 40-20 S-DARCoating: R<0.2% per surface @10.6μm
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