Distance measuring apparatus

Details Distance measuring apparatus Distance measuring apparatus

1982-02-24

1985-04-30

Buczinski, S. C.

Optics: measuring and testing

Range or remote distance finding

With photodetection

356141, G01C 308

Patent

active

045140847

ABSTRACT:
In a distance measuring apparatus in accordance with the present invention, a light beam of a wide solid angle is projected on a photographic object by means of a strobo light source, and reflected rays are received by a photoelectric device array which has a predetermined number of photoelectric devices each with narrow directivity which are comparable to solid angles necessary to see the object from the photoelectric devices disposed with their optical axes at predetermined angular pitches. When the output of a photoelectric device, which is issuing maximum amplitude output, is selected by means of a maximum value detector circuit, and a distance signal is discriminated from background noises such as sun light or electric illumination light by passing through a differentiating circuit, and then being processed by a function circuit and fed to a lens driving system or indicator.

REFERENCES:
patent: 1866581 (1932-07-01), Simjian
patent: 3512888 (1970-05-01), Humphrey
patent: 3617128 (1971-11-01), Harvey
patent: 3746454 (1973-07-01), Pace et al.
patent: 3792928 (1974-02-01), Poilleux
patent: 3953131 (1976-04-01), Britz
patent: 4006988 (1977-02-01), Tamm
patent: 4040738 (1977-08-01), Wagner
patent: 4106872 (1978-08-01), Soderstrom
patent: 4257705 (1981-03-01), Hosoe et al.
patent: 4314760 (1982-02-01), Hodge et al.

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