Rotationally independent optical correlation for position determ

Details Rotationally independent optical correlation for position determ Rotationally independent optical correlation for position determ

1977-05-12

1978-09-05

Stern, Ronald J.

Optics: measuring and testing

Range or remote distance finding

With photodetection

350 383, 356172, G01B 1126, G03H 116, G06G 900

Patent

active

041115260

ABSTRACT:
Coherent optical correlation is applied to an article having circular features as well as noncircular features. A spatial filter is constructed for a typical part with the noncircular features masked out. The filter is placed in the transform plane of the optical correlation system so that the system will produce correlation signals indicating the presence, the coordinate position and angular orientation of the part within the field of view of the system.

REFERENCES:
patent: 3483513 (1969-12-01), Burckhardt et al.
patent: 3539260 (1970-11-01), Burch
patent: 3612698 (1971-10-01), Mathisen
patent: 3636330 (1972-01-01), Holeman et al.

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