Optical 6D measurement system with three fan-shaped beams rotati

Details Optical 6D measurement system with three fan-shaped beams rotati Optical 6D measurement system with three fan-shaped beams rotati

1996-06-14

1998-06-16

Hellner, Mark

Optics: measuring and testing

Angle measuring or angular axial alignment

Relative attitude indication along 3 axes with photodetection

3561413, G01B 1126

Patent

active

057679606

ABSTRACT:
A system for the determination of the distance and orientation of an object carrying at least three light sensors from a fixed reference point when the object is irradiated by at least three modulated scanning beams of known angular orientation, and rotational frequency. Timing circuitry located in the control processor determines the time interval .increment.t , between successive interceptions of the object by each of the beams. Knowledge of this time interval and the scanning beams' relative positions and angular orientations permits calculation of the object's spatial coordinates. The optical beams utilized are fan-shaped in cross-section. The method of operation is also disclosed.

REFERENCES:
patent: 3375375 (1968-03-01), Abbey et al.
patent: 4911548 (1990-03-01), Keren-Gill
patent: 5090803 (1992-02-01), Ames et al.
patent: 5100229 (1992-03-01), Lundberg et al.
patent: 5187540 (1993-02-01), Morrison
patent: 5546176 (1996-08-01), Jokinen
patent: 5552883 (1996-09-01), Busch-Vishniac et al.

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