optical BK7 Glass plano convex concave spherical lens


Plano-Convex Lens is widely use in optical display systems, projection optics systems, imagining optical systems, and laser measurement systems. It is best use where conjugate(变化) point-- object distance, S or image distance S' is more than five times of the other. This lens is almost the most super form for both collimating(校准) a point source and focusing collimated light; Plano-Concave Lens has a negative focal length and is typically used to cause a collimated(校准) beam to diverge(分歧) as in a Galilean type beam expander or Telescope. Because the spherical aberration(失常) 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 measureemnt systerms; Double-Convex Lens, also named Bi-Convex Lens, is most suitable where the object and image are on opposite sides of the lens and the ratio of the image and object (conjugate ratio) distances is between 0.2 to 5. It is used in beam expanders,. Projection optics systems, optical viewers etc 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

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