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Double-convex lens

A double-convex lens is compose of two convex surfaces, has a positive focal length. Normally Bi-Convex lenses are most suitable where the object and image are on opposite sides of the lens, and are popular for many imaging applications.
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Specifications:
Materials:BK7, Fused Silica,Ge,Si, CaF2...
Diameter:1.5—300mm
Diameter Tolerance:+/-0.02 mm
Thickness Tolerance:0+/-0.02mm
Centring Error<3 Arc minute
Surface Quality:20—10
Surface Figure:λ/10@633nm 
Clear Aperture:90%
Coating: Specified by customers 
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