Light projection system for automatic focus detection

Details Light projection system for automatic focus detection Light projection system for automatic focus detection

1989-07-19

1990-03-06

Adams, Russell E.

354165, G03B 300

Patent

active

049070266

ABSTRACT:
A focus detecting light projecting system for detecting the focus state of a photo taking optic by projecting a pattern with a light projecting lens onto a photographing object and by receiving a reflected image of the pattern reflected from the objects. The light projecting lens has a plurality of lens parts which have different optical axes and different forward focus-adjusting degrees.

REFERENCES:
patent: 4067030 (1978-01-01), Kuramoto et al.
patent: 4367934 (1983-01-01), Matsui
patent: 4690538 (1987-09-01), Matsui et al.

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