Position determination

Details Position determination Position determination

1984-12-20

1986-04-15

Rosenberger, R. A.

Optics: measuring and testing

By polarized light examination

With light attenuation

356372, 356 1, 901 14, 901 1S, G01B 1100, G01B 1114, B25J 1100

Patent

active

045824304

ABSTRACT:
A method and apparatus for determining the relative positions of a first object (1) and a second object (3). The method comprises illuminating the first object (1) so as to produce a shadow (17) of the first object on a surface (15) lying at a known position with respect to the second object (3) and forming a two dimensional image of a scene including the surface (15). The distance between the position of the shadow (17) and a reference position (19) in the two dimensional image is monitored, and this distance is used to derive information relating to the relative positions of the first object (1) and the second object (3).

REFERENCES:
patent: 4146924 (1979-03-01), Birk et al.
patent: 4165178 (1979-08-01), Coumo, Jr. et al.
patent: 4396945 (1983-08-01), Di Matteo et al.

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