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:
Sep. 30, 1997
Filed:
Jan. 25, 1996
Applicant:
Inventors:
Emiko Isogai, Hekinan, JP;
Satoshi Koike, Kariya, JP;
Teiyuu Kimura, Oobu, JP;
Hiroshi Ando, Nagoya, JP;
Hiroyuki Tatebayashi, Handa, JP;
Assignee:
Nippondenso Co., Ltd., Aichi-pref, JP;
Primary Examiner:
Int. Cl.
CPC ...
G02B / ; G03H / ;
U.S. Cl.
CPC ...
430-1 ; 430-2 ; 430394 ; 430290 ; 359 22 ; 359 24 ;
Abstract
A hologram forming system for forming holograms on multiple exposures is provided. In this system, a holographic recording medium is exposed to light beams at least twice at incident angles different between exposures. The incident angle during each exposure process is determined in a given relation to the thickness of the holographic recording medium which tends to vary as the exposure process is repeated so that the reconstruction wavelengths match with target values without shifting between image colors during reconstruction of the hologram.