BK7 optical plano-concave spherical lens

Plano-Concave Lens has a negative focal length and is typically used to cause a collimated beam to diverge as in a Galilean type beam expander or Telescope. Because the spherical aberration of the Plano-Concave is negative, it can be used to balance the aberration of other lenses.This lens is widely use in optical display systems, projection optics systems, imaging and laser measurement systerms.

We supply optical spherical lenses,include plano-convex spherical lens,plano-concave spherical lens,bi-convex spherical lens,bi-concave spherical lens,meniscus spherical lens,special spherical lens etc..

Specification of our plano-convex spherical lenses as follow:

*Material:BK7 or other materials

*Focal length:+/-1%

*Center thickness tolerance:+/-0.01mm

*Centration:1 arc minutes

*Surface Figure:lambda/2 at 633nm on plano side

*Surface quality:40/20 stratch/dig

*Clear Apenture>90%

*Chamfer Protective:0.25mm at 45 degree typical

*Coating:optional