Photographic lens having ghost image prevented from appearing

Details Photographic lens having ghost image prevented from appearing Photographic lens having ghost image prevented from appearing

1989-01-26

1990-01-09

Arnold, Bruce Y.

350423, 350427, G02B 1514, G02B 964

Patent

active

048923974

ABSTRACT:
In the photographic optical system comprised of a plurality of lenses and having a filter in between the lenses, a light beam emerging from a lens on the object side of the filter is arranged to diverge to prevent the light reflected from a solid state image pickup element on a predetermined image plane from being reflected again by the filter to re-focus on the predetermined image plane.

REFERENCES:
patent: 4770510 (1988-09-01), Mukaiya
patent: 4812024 (1989-03-01), Mukaiya

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