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:
May. 28, 1996
Filed:
Oct. 06, 1994
Applicant:
Inventors:
Noriko Nakanishi, Tokyo, JP;
Hidehiro Kume, Tokyo, JP;
Assignee:
Sony Magnescale Inc., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01N / ;
U.S. Cl.
CPC ...
25055922 ; 2502014 ; 356376 ;
Abstract
A displacement detecting system comprises an optical detector which includes a one-chip optical IC having a laser light source, light receiving elements for generating, in response to laser light reflected by a surface to be measured, a focus error signal indicative of a deviation of a distance between the surface and an objective lens from a focal length thereof, and a prism.
Nakanishi, Noriko. (1996). Compact displacement detecting system with optical integrated circuit (U.S. Patent No. 5521394). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/5521394
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