Apparatus for determining the position of a mark on an object

Details Apparatus for determining the position of a mark on an object Apparatus for determining the position of a mark on an object

1981-05-20

1984-07-03

Rosenberger, R. A.

Optics: measuring and testing

By polarized light examination

With light attenuation

350 9628, G01B 1124

Patent

active

044576269

ABSTRACT:
Disclosed is an apparatus for determining the position of a mark on an object to be determined in terms of configuration, movement or any other geometrical or physical condition, using a photosensitive element and a light reflecting body in such a combination that the reflecter intercepts and casts to the photo-sensitive area of the element the beam of light from the mark, which beam of light would, otherwise, travel apart from the photo-sensitive element, not falling thereon. Thus, the measuring range of the photo-sensitive element is apparently extended, or otherwise the accuracy with which the mark position is determined is substantially improved.

REFERENCES:
patent: 3170980 (1965-02-01), Pritchard
patent: 3740112 (1973-06-01), Lundgren
patent: 4125317 (1978-11-01), Gordon et al.
patent: 4146926 (1979-03-01), Clerget et al.
patent: 4183672 (1980-01-01), Raber et al.
patent: 4299491 (1981-11-01), Waters et al.
"Zoomable Kaleidoscopic Mirror Tunnel," Applied Optics, J. H. Myer, vol. 10, No. 9, pp. 2179-2182 (1971).
"Feature Extraction of 3-Dimensional Objects with a Laser Tracker," Transaction of the Installment and Control Engineers, vol. 10, No. 5, pp. 599-605 (1974).
Krolak et al., "The Optical Tunnel-A Versatile Electrooptical Tool" Journal of the SMPTE, vol. 72, No. 3 (Mar. 1963) pp. 177-180.

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