Active-type automatic focusing apparatus

Details Active-type automatic focusing apparatus Active-type automatic focusing apparatus

1994-10-19

1997-03-18

Perkey, W. B.

Photography

With exposure objective focusing means, focusing aid, or...

Having auxiliary illumination

356 308, G03B 1336, G01C 308

Patent

active

056131674

ABSTRACT:
An active-type automatic focusing apparatus having an arrangement that a light receiving portion is disposed on each side of a light emitting unit to obtain the distance from a subject in accordance with the output from each light receiving portion. An automatic focusing apparatus of the foregoing type is enabled to have a small size by shortening the distance from either of the light receiving portions disposed on the two sides of the light emitting unit to the light emitting unit than the distance from the other light receiving portion.

REFERENCES:
patent: 4257705 (1981-03-01), Hasoe et al.
patent: 4443078 (1984-04-01), Niwa et al.
patent: 4518242 (1985-05-01), Toyama
patent: 4814810 (1989-03-01), Ishiguro
patent: 5210585 (1993-05-01), Suzuki
patent: 5221955 (1993-06-01), Inoue
patent: 5235377 (1993-08-01), Ide et al.
patent: 5361117 (1994-11-01), Nonaka
patent: 5373344 (1994-12-01), Kakiuchi

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