Aspherical glass lens element formed by a low dispersion glass m

Details Aspherical glass lens element formed by a low dispersion glass m Aspherical glass lens element formed by a low dispersion glass m

1990-03-16

1991-04-02

Sugarman, Scott J.

G02B 1318

Patent

active

050043307

ABSTRACT:
In an aspherical lens element which has an optical axis, a focal length f, a thickness D 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, the aspherical lens element is formed by a low dispersion glass material which has a refractive index n and an Abbe number .nu. specified by:

REFERENCES:
patent: 4449792 (1984-05-01), Arai et al.
patent: 4571031 (1986-02-01), Nakamura
patent: 4641929 (1987-02-01), Braat
patent: 4743093 (1988-05-01), Oinen
patent: 4765723 (1988-08-01), Takamura
patent: 4768867 (1988-09-01), Suda
patent: 4842388 (1989-06-01), Tanaka et al.
patent: 4902113 (1990-02-01), Ishiwara
patent: 4902114 (1990-02-01), Arai
patent: 4932763 (1990-06-01), Matsuoka

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