Distance measuring instrument

Details Distance measuring instrument Distance measuring instrument

1998-11-19

2000-04-04

Buczinski, Stephen C.

Optics: measuring and testing

Range or remote distance finding

Triangulation ranging with photodetection, but with no...

2502016, 396114, 396121, 396128, G01C 308, G02B 704, G03B 1300

Patent

active

060467959

ABSTRACT:
A measuring instrument is formed of an image pickup device having a pair of image-forming lenses and photosensor arrays; and an arithmetic device using two images of a measured object photographed by the image pickup device to calculate the distance to the object based on the principle of triangulation. The image-forming lenses, a first holding member for the image-forming lenses and a second holding member for the photosensor arrays are formed of the same plastic material without hygroscopicity. Changes in size of the measuring instrument by ambient temperature and humidity are prevented to increase distant measurement accuracy.

REFERENCES:
patent: 4313654 (1982-02-01), Matsui et al.
patent: 4529287 (1985-07-01), Karasaki et al.
patent: 4662735 (1987-05-01), Karasaki et al.
patent: 5233382 (1993-08-01), Taniguchi et al.
patent: 5721994 (1998-02-01), Ogata et al.
patent: 5745805 (1998-04-01), Iyama

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