Optics: measuring and testing – Range or remote distance finding – Triangulation ranging to a point with two or more projected...
Patent
1995-05-16
1996-08-27
Buczinski, Stephen C.
Optics: measuring and testing
Range or remote distance finding
Triangulation ranging to a point with two or more projected...
356 301, 354403, 2502016, G01C 300, G02B 704, G03B 300
Patent
active
055506283
ABSTRACT:
A distance measuring apparatus provided with a plurality of light-emitting units and a plurality of light-receiving units. The light emission period of each of the light-emitting units is changed over at each predetermined period interval. A plurality of light-receiving elements constituting each light-receiving unit are constructed so as to receive the reflected lights from a plurality of distance measurement fields of view on an object to be photographed in a plurality of distance measurement zones obtained by dividing a range to be measured into several blocks. The input signal from each of the light-receiving elements in each of the distance measurement zones is changed over in synchronism with the light emission period of the light-emitting units and the output signals for the respective distance measurement zones are compared, whereby a distance data indicative of the distance measurement zone most approximate to the object distance is put out.
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Kojima, Akio, "A Consideration of Future Auto-Focusing Cameras", Camera Mainichi (Oct. 1981) (and English translation).
Buczinski Stephen C.
Canon Kabushiki Kaisha
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