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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 can manufacture various shape and special material optical lens, such as plano-convex spherical lens,plano-concave spherical lens,bi-convex spherical lens,bi-concave spherical lens,meniscus spherical lens,special spherical lens,achromatic lens,ball lens,sphere lens etc. Diameter from 1mm upto 300mm, depends on the detailed specification.
Specification of our bi-convex spherical lenses as follow:
*Material:Bk7,fused silica,CaF2,MgF2,BaF2,ZnSe and other infrared optical crystals.
*Focal length:+/-1%
*Length tolerance:+0.0 - -0.1mm
*Width tolerance:+0.0 - -0.1mm
*Center thickness tolerance:+/-0.1mm
*Surface Figure:lambda/2 at 633nm on plano side
*Surface quality:20/10,40/20,60/40 stratch/dig
*Clear Apenture>95%
*Chamfer:0.25mm at 45 degree typical
*Coating: BBAR, Reflective coating, dichroic coating,AR coating etc.
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