Range finder with compensation of rotation about Z-axis

Details Range finder with compensation of rotation about Z-axis Range finder with compensation of rotation about Z-axis

1995-12-28

1998-02-03

Hellner, Mark

Optics: measuring and testing

Range or remote distance finding

Triangulation ranging with photodetection, but with no...

396128, G01C 300

Patent

active

057150435

ABSTRACT:
A range finder having: first and second lenses for focussing an image of a subject via spatially different optical paths; first and second photosensor arrays disposed generally parallel and each having a plurality of pixels, an image being focussed on the first and second photosensor arrays by the first lens; a third photosensor array having a plurality of pixels, an image being focussed on the third photosensor array by the second lens, and a line extending through pixels of the first photosensor array and pixels of the third photosensor array having a slant from a line extending through the optical axes of the first and second lenses; a phase difference detecting unit for detecting a phase difference between images focussed by the first and second lenses and correcting an error to be caused by the slant in accordance with images focussed on the first to third photosensor arrays; and a distance calculating unit for calculating distance data to the subject in accordance with the phase difference detected by the phase difference detecting unit.

REFERENCES:
patent: 5357310 (1994-10-01), Kawamura et al.
patent: 5512997 (1996-04-01), Ogawa

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