Distance measuring device

Details Distance measuring device Distance measuring device

1985-12-17

1987-03-24

Perkey, William B.

Optics: measuring and testing

Range or remote distance finding

With photodetection

356 1, G03B 300, G01C 308

Patent

active

046521070

ABSTRACT:
A distance measuring device for a camera of the kind measuring distances to a plurality of spots within a photo-taking image plane gives accurate data of distance measurement. The device comprises in combination signal projecting means arranged to project a distance measuring signal onto the spots of the image plane one after another; signal receiving means arranged to receive a reflection signal resulting from the distance measuring signal and to produce measured distance data one after another according to the part thereof at which the reflection signal is received; and measured distance data selection means arranged to select, from among the measured distance data obtained one after another from the signal receiving means, a data fluctuating to a less degree than a predetermined value as an effective measured distance data.

REFERENCES:
patent: 4441810 (1984-04-01), Momose et al.
patent: 4470681 (1984-09-01), Johnson
patent: 4575211 (1986-03-01), Matsumura et al.

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