柱面镜

 

Cylindrical lenses are available in either plano-concave or plano-convex configurations from MT-Optics,Inc. Plano-concave lenses have a negative focal length and are used for image reduction or to spread light. Plano-convex lenses have a positive focal length, which makes them ideal for collecting and focusing light for many imaging applications.

Cylindrical lenses are used to correct astigmatism in the eye and in rangefinders, to produce astigmatism, tretching a point of light into a line, they are widely used in bar code scanning, projection optics systems, laser measurement systems and holography.

Specifications:
Material:-------------------------------------------------N-BK7, Fused Silica,N-SF10, CaF2 etc.
Diameter Tolerance:--------------------------------+0.0/-0.15mm (General), +0.0/-0.02mm (High Precision)
Focal Length Tolerance (mm):--------------------+/-2%
Centration:-----------------------------------------------<3 arc minutes
Clear Aperture:---------------------------------------->80% (Small Size), >95% (Large Size)
Surface Figure X (per 25mm@632.8nm)------λ/2 (General), λ/4 (High Precision)
Surface Figure Y (per 25mm@632.8nm)------2λ (General), λ (High Precision)
Surface Quality:---------------------------------------60/40 (General), 10/5 (High Precision)
Protected Bevel:---------------------------------------<0.25mmx45deg
Coating:-------------------------------------------------Upon request
 

  

 

 

Note: Other sizes, material and coating are available upon request.


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