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/[email protected] nm
Centration error <3 arcmin
Protective chamfers <0,25 mm x 45 deg
Coatings uncoated
Price list
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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 Various AR coatings are available for all these lenses. Please refer to the Coatings section
varna Other dimensions are available in small and mass production quantities

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

Catalog Items

MaterialDiameter, mmFocal Length, mmEdge Thickness, mmProduct IDPrice,
BK712.7 -12 5.0 1-BCV-1-A127 32
BK712.7-155.01-BCV-1-B12730
BK712.7-204.51-BCV-1-C12728
BK725.4-258.01-BCV-1-A25438
BK725.4-308.01-BCV-1-B25434
BK725.4-357.01-BCV-1-C25432
BK725.4-507.01-BCV-1-D25430

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Items per page page
Material Diameter, mm Edge Thickness, mm Focal length, mm ROC1, mm ROC2, mm Delivery Product ID Price Action
BK7 12.7 5.0 -12 -12.59 12.59 2-4 weeks 1-BCV-1-A127 32 €
BK7 25.4 8.0 -25 -26.11 26.11 2-4 weeks 1-BCV-1-A254 38 €
BK7 12.7 5.0 -15 -15.85 15.85 2-4 weeks 1-BCV-1-B127 30 €
BK7 25.4 8.0 -30 -31.41 31.41 2-4 weeks 1-BCV-1-B254 34 €
BK7 12.7 4.5 -20 -21.11 21.11 2-4 weeks 1-BCV-1-C127 28 €
BK7 25.4 7.0 -35 -36.71 36.71 2-4 weeks 1-BCV-1-C254 32 €
BK7 25.4 7.0 -50 -52.16 52.16 2-4 weeks 1-BCV-1-D254 30 €
UVFS 12.7 5.0 -15 -14.11 14.11 2-4 weeks 1-BCV-2-A127 52 €
UVFS 25.4 8.0 -30 -27.81 27.81 2-4 weeks 1-BCV-2-A254 60 €
UVFS 12.7 5.0 -20 -18.75 18.75 2-4 weeks 1-BCV-2-B127 48 €
UVFS 25.4 8.0 -40 -37.12 37.12 2-4 weeks 1-BCV-2-B254 58 €
UVFS 12.7 4.5 -25 -23.32 23.32 2-4 weeks 1-BCV-2-C127 48 €
UVFS 25.4 7.0 -50 -46.43 46.43 2-4 weeks 1-BCV-2-C254 58 €

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You can customise this product to your needs. If you do not find suitable specifications for your application please contact us for custom solution.

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