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:
Dec. 15, 1981
Filed:
Jan. 03, 1980
Applicant:
Inventors:
Ken Utagawa, Yokohama, JP;
Kunihisa Hoshino, Kawasaki, JP;
Hiroshi Shirasu, Kawasaki, JP;
Akira Ogasawara, Yokohama, JP;
Assignee:
Nippon Kogaku K.K., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01J / ;
U.S. Cl.
CPC ...
250201 ; 250578 ;
Abstract
A device for extracting a plurality of space frequency components from an optical image formed by an image forming optical system comprises a photoelectric element array including at least N photoelectric elements disposed in or near the image formation plane of the image forming optical system, and means for generating, on the basis of the output of each of the photoelectric elements of the array, an electrical output varying in phase in accordance with the displacement of the optical image in the direction of arrangement of the photoelectric elements.