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Product Catalog 2016

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Double-Concave Lenses

Double-Concave Lenses
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Material BK7, FS, UVFS, CaF2, ZnSe, Si, Ge
Diameter tolerance +0.0/-0.1 mm
Thickness tolerance ±0.1 mm
Clear aperture >90%
Focal Length Tolerance ±3 %
Design wavelength 632.8 nm
Surface quality 40-20 S-D
Surface figure <λ/4 @ 632.8 nm
Centration error <3 arcmin
Protective chamfers <0.25 mm x 45°
Coatings Available on request
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Attention! You can customise this product to your needs.
The biconcave lenses are used in optical systems in combination with other lenses. These lenses also work as beam expanders, optical character readers, viewers and projection systems. Under customer request anti-reflection or other types of coatings can applied.
varna Lower spherical aberrations than for Plano-Concave lenses
varna Diverges incident light
varna Ideal for Experimenting and Prototyping Applications

Properties (Diameter D, Focal length L)

D, mmD, InchesL Minimal, mmL Maximal, mm
12,7 0.5 -12 -10.000
25,4 1 -25 -10.000
38,1 1.5 -40 -10.000
50,8 2 -50 -10.000
76,23-75-10.000

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