Photographic lens free from forming of ghost image

Details Photographic lens free from forming of ghost image Photographic lens free from forming of ghost image

1988-07-22

1991-02-26

Sugarman, Scott J.

350450, G02B 1514

Patent

active

049957082

ABSTRACT:
A photographic lens including a plurality of lenses on the image plane side of an aperture stop for determining values of the F-number, wherein stray light reflected, in turn, from a predetermined image plane or thereabout and each lens surface is prevented from taking a focus at so near a position to the predetermined image plane as to deteriorate the image quality.

REFERENCES:
patent: 4432615 (1984-02-01), Ikamori
patent: 4437733 (1984-03-01), Takahashi et al.
patent: 4482218 (1984-11-01), Tanaka
patent: 4623226 (1986-11-01), Fujii
patent: 4662723 (1987-05-01), Imai

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