Distance measuring device

Details Distance measuring device Distance measuring device

1982-08-16

1985-01-22

Perkey, William B.

Optics: measuring and testing

Range or remote distance finding

With photodetection

356 1, G03B 708, G01C 300

Patent

active

044948484

ABSTRACT:
A distance measuring device having a light projecting element and a light receiving or sensitive element normally brings a photo-taking lens into an in-focus position in accordance with a signal produced from the light receiving element. When the quantity of light received by the light receiving element exceeds a predetermined level due to high brightness of an object to be photographed, this condition is detected and the lens is either brought into a predetermined position or an in-focus position on the long distance side to avoid a focal deviation for the high brightness object.

REFERENCES:
patent: 4257705 (1981-03-01), Hosoe et al.
patent: 4300824 (1981-11-01), Tokuda et al.

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