Optics: measuring and testing – Range or remote distance finding – With photodetection
Patent
1978-01-05
1979-12-11
Buczinski, S. C.
Optics: measuring and testing
Range or remote distance finding
With photodetection
250201, 354 25, 356 4, G01C 300, G03B 708
Patent
active
041780981
ABSTRACT:
A range detecting method and apparatus in which a first and a second image of an object each having a relative positional parallax corresponding to the object distance formed by a range finding optical system are purely electrically scanned by the use of one or more photosensor arrays and the resulting image scan signals in analog form relating to the first and second images are applied to first and second analog storing devices for storage therein, in which coincidence or non-coincidence between the analog image scan signals is detected by coincidence detecting drive while one of these image scan signals is shifted bit by bit relative to the other image scan signal, thereby counting an amount of shift bits required until the image scan signals of the same bit number relating to the first and second images are rendered most appropriately coincident with each other, whereby the object distance may be known from such amount of shift bits.
REFERENCES:
patent: 3898676 (1975-08-01), Hosoe et al.
patent: 3945023 (1976-03-01), Stauffer
patent: 4004852 (1977-01-01), Pentecost
Asano Noriyuki
Niwa Yukichi
Owada Mitsutoshi
Tsuda Shin
Yamagata Takaaki
Buczinski S. C.
Canon Kabushiki Kaisha
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