Patent Number: 7,132,200

Title: Hologram recording sheet, holographic optical element using said sheet, and its production process

Abstract: The hologram recording sheet according to the invention is made up of a base film and hologram sensitive materials sensitive to different wavelength regions formed therein in a desired pattern, or a film and at least two hologram recording sensitive materials sensitive to different wavelength regions laminated on the film with a transparent plastic spacer layer located therebetween, thereby enabling the required diffraction light wavelengths to be recorded on the required sites without producing unnecessary interference fringes. At least two hologram recording sensitive materials sensitive to different wavelength regions are formed on different sites on a film in dotted or striped configuration, the size of which is up to 200 mm or at least twice as large as the thickness of the sensitive material layers, thereby enabling regions diffracting light of different wavelengths to be formed in the form of independent sets of interference fringes.

Inventors: Ueda; Kenji (Tokyo, JP), Hotta; Tsuyoshi (Tokyo, JP), Taniguchi; Yukio (Tokyo, JP), Sekiguchi; Atsushi (Tokyo, JP), Iriyama; Hideyuki (Tokyo, JP)

Assignee: Dai Nippon Printing Co., Ltd.

International Classification: G03H 1/02 (20060101)

Expiration Date: 2019-11-07 0:00:00