Aspherical glass lens element suitable for a collimator lens

Details Aspherical glass lens element suitable for a collimator lens Aspherical glass lens element suitable for a collimator lens

1990-03-09

1991-06-04

Dzierzynski, Paul M.

350413, B29D 1100

Patent

active

050208888

ABSTRACT:
In an aspherical glass lens element which has an optical axis, a focal length f, a thickness along the optical axis, and first and second aspherical convex surfaces defined by first and second predetermined formulae represented as functions of first and second radii r.sub.1 and r.sub.2 of curvature at apexes of the first and the second aspherical convex surfaces and first and second coefficients k.sub.1 and k.sub.2 of cones, f/D, r.sub.1 /r.sub.2, and k.sub.1 /k.sub.2 fall within the following ranges:

REFERENCES:
patent: 4743093 (1988-05-01), Oinen
patent: 4902113 (1990-02-01), Ishiwata

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