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Concave-Convex Lenses

Concave-Convex Lenses



Concave-convex lenses are also called meniscus lenses. The lens has an external convex surface and an internal concave surface. If the radians outward are greater than the radians inward, the lens has a regular focal length and is used as a magnifying glass.

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Concave-convex lenses are also called meniscus lenses. The lens has an external convex surface and an internal concave surface. If the radians outward are greater than the radians inward, the lens has a regular focal length and is used as a magnifying glass.



Products Description


                                                                                                                                                            

Material:               
 Optical Glass, Fused Silica etc.
Diameter tolerance:
 +/-0.1mm
Thickness tolerance: 
 +/-0.2mm
Focal tolerance:
 +/-2%
Surface quality :
 40-20, 20-10
Centration: 
 3 arcmin
Surtace flatness:
 2λ, 1/2λ, 1/4λ
Clear aperture:
 90%
Bevel:
 0.2mmX45° Protective bevel