Distance measuring device and automatic focusing system using sa

Details Distance measuring device and automatic focusing system using sa Distance measuring device and automatic focusing system using sa

1982-07-13

1985-08-06

Buczinski, S. C.

Optics: measuring and testing

Range or remote distance finding

With photodetection

354403, G01C 310, G03B 708

Patent

active

045332410

ABSTRACT:
In the disclosed measuring device, a projecting arrangement projects radiation modulated at a predetermined frequency toward an object and a sensing arrangement senses the radiation reflected by and coming from the object for producing an output signal indicative of the energy intensity of the received radiation. The projecting arrangement and sensing arrangement are moved relative to each other to scan the object while a converter converts the output signal of the sensing arrangement into digital data in synchronism with the modulation of the radiation being projected by the projection arrangement. The digital data is processed each predetermined number of cycles for producing an electrical output related to the change in energy intensity of the reflected radiation.

REFERENCES:
patent: 4274735 (1981-06-01), Tamura et al.
patent: 4330202 (1982-05-01), Yokota
patent: 4365878 (1982-12-01), Tokuda et al.
patent: 4429967 (1984-02-01), Tokuda et al.

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