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:
Feb. 07, 1978
Filed:
Jan. 16, 1976
Applicant:
Inventors:
Yoshiaki Kimura, Hachioji, JA;
Hiroshi Ito, Inagi, JA;
Assignee:
Konishiroku Photo Industry Co., Ltd., Tokyo, JA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01B / ;
U.S. Cl.
CPC ...
356109 ; 356108 ;
Abstract
A light interference device comprising a light source having a low degree of spacial coherence, an optical element having a reference surface for interference, an optical system for providing a parallel light bundle, and an optical projection system for projecting interference fringes localized near the interference surface. Said parallel light bundle comes out of the reference surface at an angle .theta. within the range of 0.degree. < .theta. .ltoreq. 30.degree..