Distance-measuring apparatus

Details Distance-measuring apparatus Distance-measuring apparatus

1998-10-06

2000-05-23

Buczinski, Stephen C.

Optics: measuring and testing

Range or remote distance finding

Triangulation ranging with photodetection, but with no...

180167, 356 402, G01C 300, G01C 308, G01C 500, B60T 716

Patent

active

060671475

ABSTRACT:
A distance-measuring apparatus is formed of a photographic device formed of a pair of image-forming lenses and photosensor arrays for taking images of an object through the image-forming lenses, and a calculating device electrically connected to the photosensor arrays for calculating a distance to an object to be measured by two images of the object taken by the photographic device based on a triangulation principle. The calculating device calculates the distance to the object by an amount of shift determined based on an inter-optical-axis distance of the pair of image-forming lenses and photographed images of a reference object having a pattern of a periodic structure repeated at an interval same as the inter-optical-axis distance; a difference in offsets of image-forming positions on the photosensor arrays caused by a medium located between the apparatus and the measured object, with the difference being detected based on the amount of the shift; and an amount of shift detected when the distance to the measured object is measured.

REFERENCES:
patent: 5233382 (1993-08-01), Taniguchi et al.
patent: 5850254 (1998-12-01), Takano et al.

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