Imaging single lens

Details Imaging single lens Imaging single lens

1985-10-09

1988-08-23

Corbin, John K.

G02B 302

Patent

active

047657251

ABSTRACT:
An imaging single lens in which perfectly, a first surface is an axis-symmetrical non-spherical surface having a radius of curvature r.sub.1 in the vicinity of the optical axis, a second surface is a convex spherical surface having a radius of curvature r.sub.2, the center thickness is d, the non-spherical shape of the first surface is a shape displaced outwardly from the central portion to the marginal portion relative to a reference spherical surface of radius r.sub.1, and as p.ident.-r.sub.2 /d, p is 1 or a value approximate to 1.

REFERENCES:
patent: 934579 (1909-09-01), Straubel et al.
patent: 4415238 (1983-11-01), Braat et al.
patent: 4449792 (1984-05-01), Arai et al.
patent: 4657352 (1987-04-01), Suda et al.

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