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:
Mar. 13, 1979
Filed:
Nov. 08, 1977
Applicant:
Inventors:
Susumu Yonezawa, Kodaira, JP;
Yasuhiro Torii, Hachioji, JP;
Haruo Ogiwara, Tokorozawa, JP;
Gisaku Nakamura, Mitaka, JP;
Assignee:
Primary Examiner:
Int. Cl.
CPC ...
G03H / ; G03H / ; G02B / ;
U.S. Cl.
CPC ...
350-382 ; 3501 / ; 350314 ;
Abstract
A phase shifter for adding a deterministic phase to an original information to be recorded in hologram. The phase shifter consists of a number of unit cells arranged in a matrix. A set of the unit cells are provided which will cause a certain phase shift to a light passing through each kind of the unit cells so as to distribute the light irradiance of the original information more evenly over the Fourier transformed plane. The invention suggests a solution to make the phase shifter with the unit cells arranged by the deterministic phase distribution.