Positioning device

Details Positioning device Positioning device

1984-10-23

1987-05-26

Evans, F. L.

Optics: measuring and testing

By alignment in lateral direction

With light detector

G01B 1100

Patent

active

046680950

ABSTRACT:
A positioning device employing a single image pick-up device whereby two objects can be accurately aligned irrespective of inaccuracies in the pick-up device. The positioning device includes as a primary element an optical device composed of two prisms joined at oblique surfaces with a half-silvered mirror surface therebetween. The objects to be aligned are positioned adjacent first side surfaces of corresponding ones of the two prisms. A totally reflecting coating is provided on a second side surface of one of the two prisms, and an image pick-up device, namely, a video camera, is disposed to receive light emanating from the parallel second side surface of the other one of the two prisms. Alignment is effected in accordance with the output signal from the video camera.

REFERENCES:
patent: 2460350 (1949-02-01), Hinman
patent: 3560093 (1971-02-01), Montone
patent: 3684384 (1972-08-01), Hojo et al.
patent: 3889056 (1975-06-01), Mayer, Jr. et al.
patent: 4037969 (1977-07-01), Feldman et al.
patent: 4232969 (1980-11-01), Wilczynski
Culver et al., IBM Technical Disclosure Bulletin, vol. 17, No. 10, Mar. 1975, p. 2983.
Gaston et al., IBM Technical Disclosure Bulletin, vol. 25, No. 5, Oct. 1982.

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