The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 25, 1983
Filed:
Jan. 19, 1981
Applicant:
Inventors:
James S Newcomb, St. Paul, MN (US);
Charles Eumurian, Mahtomedi, MN (US);
Assignee:
Control Data Corporation, Minneapolis, MN (US);
Primary Examiner:
Int. Cl.
CPC ...
G01B / ; G01B / ; G02B / ;
U.S. Cl.
CPC ...
356375 ; 350294 ; 356394 ;
Abstract
Apparatus for optical measurement of the displacement and the obliquity of a test surface relative to an imaginary reference surface. An inwardly converging ring of light is projected onto a test surface. An optical system conveys an image of this ring to a photo diode array where its circumference is compared to an imaginary image of the ring projected onto an imaginary reference surface. This comparison yields the displacement of the test surface through 360.degree. of rotation, which is converted into the shape or contour of the test surface.