Optics: measuring and testing – Range or remote distance finding – With photodetection
Patent
1992-01-08
1994-06-21
Buczinski, Stephen C.
Optics: measuring and testing
Range or remote distance finding
With photodetection
2502016, 354403, G01C 300, G01C 500, G03B 300
Patent
active
053232224
ABSTRACT:
A distance measuring device contains a light-projecting section for projecting luminous flux onto a subject. A light-receiving section is placed the base length away from the light-projecting section, receives the reflected rays of light from the subject, and produces a photoelectric current according to the amount of light received. The light-receiving section is divided into at least four light-receiving elements by a first dividing line that crosses the base length at right angles and by a second dividing line that crosses the first dividing line obliquely. A first ratio calculating section calculates the ratio of the sum of the photoelectric currents generated by the light-receiving elements on one side of the first dividing line to the sum of the photoelectric currents produced by the light-receiving elements on the other side. A second ratio calculating section calculates the ratio of the sum of the photoelectric currents generated by the light-receiving elements on one side of the second dividing line to the sum of the photoelectric currents produced by the light-receiving elements on the other side. A distance-determining section calculates the sum of the outputs of the first and second ratio calculating sections, and based on the resulting value, determines the distance from the device to the subject.
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Buczinski Stephen C.
Olympus Optical Co,. Ltd.
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