Range finder and method

Optics: measuring and testing – Range or remote distance finding – Triangulation ranging to a point with one projected beam

Reexamination Certificate

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Details

C356S003020, C356S003030, C356S003040, C356S003050, C356S003100

Reexamination Certificate

active

07075625

ABSTRACT:
Pattern projection apparatuses are placed on each other in a stack manner in a stripe pattern direction for projecting the same patterns. An image pickup apparatus (camera1) is placed between the pattern projection apparatuses. The optical axes of the pattern projection apparatuses and the image pickup apparatus are aligned on the same plane parallel with the stripe pattern direction. On the plane, the principal points also become the same. An image of a stripe pattern is picked up directly by the image pickup apparatus without the intervention of a half mirror, etc., and is recoded. An image of the recoded stripe pattern is picked up by an image pickup apparatus (camera2) and is decoded and the range of an object is measured by triangulation based on image correspondence points.

REFERENCES:
patent: 4842411 (1989-06-01), Wood
patent: 5548392 (1996-08-01), Ogawa
patent: 6356298 (2002-03-01), Abe et al.
patent: 6417880 (2002-07-01), Uomori et al.
patent: 6549288 (2003-04-01), Migdal et al.
patent: 6549289 (2003-04-01), Ellis
patent: A 3-192474 (1991-08-01), None
patent: A 5-332737 (1993-12-01), None
patent: A 2000-9442 (2000-01-01), None
patent: 2000-065542 (2000-03-01), None
patent: A 2000-65542 (2000-03-01), None

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