Distance measuring apparatus

Details Distance measuring apparatus Distance measuring apparatus

1998-04-27

2000-04-25

Buczinski, Stephen C.

Optics: measuring and testing

Range or remote distance finding

Triangulation ranging to a point with one projected beam

396106, 396121, G01C 300, G03B 1300, G03B 1334

Patent

active

060550414

ABSTRACT:
A distance measuring apparatus for a camera includes light-projecting means for projecting a light beam onto an object of distance measurement, and a pair of sensor arrays, each including a plurality of pixels located at respective pixel positions for receiving reflected light of the light beam reflected by the object of distance measurement and outputting a signal corresponding to the amount of reflected light received. The apparatus further includes phase difference detection means for detecting a phase difference between signals output from the pair of sensor arrays, distance measuring means for measuring a distance to the object on the basis of the phase difference, and shortest range discrimination means for discriminating whether the object of distance measurement is in a shortest range, on the basis of levels of maximum values of signals output by said pair of sensor arrays, where the shortest range is a distance or range at which photography can not be performed.

REFERENCES:
patent: 4655586 (1987-04-01), Stauffer
patent: 4943824 (1990-07-01), Nabeshima et al.
patent: 4947202 (1990-08-01), Kitajima et al.
patent: 5848305 (1998-12-01), Takasaki
patent: 5870178 (1999-02-01), Egawa et al.

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