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. 06, 1980
Filed:
Jan. 18, 1979
Applicant:
Inventors:
Masakazu Matsumoto, Yokohama, JP;
Koujiro Yokono, Kawasaki, JP;
Takashi Tanaka, Tokyo, JP;
Shigeo Toganou, Tokyo, JP;
Hiroyoshi Kishi, Tokyo, JP;
Katsuhiko Nishide, Yokohama, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03H / ; G02B / ;
U.S. Cl.
CPC ...
350-361 ; 430-2 ; 430-9 ; 430945 ;
Abstract
Holograms are produced by exposing a film-like sensitive member composed of polyvinylcarbazole or its derivatives containing an iodine compound to an interference pattern of laser, swelling the sensitive member thus exposed in a first solvent and simultaneously eluting most of the iodine compound, if desired, the iodine compound may be eluted before this swelling treatment, and then shrinking the swollen sensitive member in a second solvent.