BK7 Double-Concave Lenses

Double concave lens(DCV) is similar with plano concave lens. The focus length is negative. It can make parallel light diverge outside. The two sides have same radius of curvature. Double convex lens generally used for expanding beam of light and projection etc. BK7 double concave lens has excellent transmittance from visible to near infrared wavelength (350-2000nm).

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Description

CAT. Dia(mm) EFL(mm) BFL(mm) CT(mm) ET(mm)
ALDV01-006-008 6 -8 -8.3 1.0 2.1
ALDV01-010-010 10 -10 -10.5 1.5 4.0
ALDV01-012-015 12 -15 -15.7 2.0 4.4
ALDV01-012-020 12 -20 -20.7 2.0 3.7
ALDV01-012-024 12.7 -24 -24.7 2.0 3.6
ALDV01-025-025 25 -25 -25.8 2.5 8.8
ALDV01-025-050 25 -50 -50.8 2.5 5.5
ALDV01-025-075 25.4 -75 -76.2 3.5 5.6
ALDV01-050-100 50 -100 -101.2 3.5 9.6

*All models can’t be totally listed. Other demand, please send us required spec details.
*In addition to N-BK7, we could also supply CaF2, Fused Silica, ZnSe substrate DCV lenses with customized size and coatings available.