 Printed circuit board |
| What is claimed is: 1. A printed circuit board comprising a non-conductive substrate and at least ... |
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| Optical storage media with discontinuous thin metallic films |
| In accordance with this invention an optical storage medium for storing binary data by printing ... |
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| Polymer dispersed liquid crystal panel with diffraction grating |
| An object of this invention is to provide a liquid crystal panel capable of realizing high ... |
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| Three-dimensional image display device |
| This invention is made in view of such circumstances. It is an object of the present invention to ... |
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| Optically active diffractive device |
| OF THE PREFERRED EMBODIMENTS The preferred diffractive liquid crystal phase gratings according to ... |
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| Matrix-type display device |
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| Method of detecting and adjusting exposure conditions of charged particle exposure system |
| An object of the present invention is to provide a method of accurately detecting exposure ... |
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| Veiling glare control holographic windshield |
| OF THE PREFERRED EMBODIMENT FIG. 2 illustrates a veiling glare control holographic windshield 50 ... |
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| System and method of forming structural assemblies with 3-D woven joint pre-forms |
| The present invention provides a co-bonded structural assembly for composite materials that ... |
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Hologram recording sheet, holographic optical element using said sheet, and its production process
| Details |
Inventors: Ueda, Kenji; Hotta, Tsuyoshi; Taniguchi, Yukio; Sekiguchi, Atsushi; Iriyama, Hideyuki;
Assignee: Dai Nippon Printing Co., Ltd. (Shinjuku-ku, JP)
Primary Examiner: Angebranndt; Martin
Assistant Examiner:
Attorney, Agent or Firm: Sughrue, Mion, Zinn, Macpeak & Seas, PLLC
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. |
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DETAILED DESCRIPTION An object of the invention is to provide a hologram recording sheet which enables an image of good quality to be obtained and, at the same time, hologram recording to be easily made at an advantageous cost.
Another object of the invention is to provide a hologram recording sheet that can be used to make the pitch of interference fringes, as designed, either by simultaneous exposure or by sequential exposure.
A further object of the invention is to provide a hologram recording sheet which enables an image of good quality to be displayed in multicolor.
A still further object of the invention is to provide a hologram combiner or display hologram which enables an image of good quality to be displayed in multicolor.
A still further object of the invention is to provide a heat-wave reflecting film which can reflect heat wave wavelengths in a wide wavelength region and can prevent any reduction in the transmission of visible light, and a method for producing it.
A still further object of the invention is to provide a holographic filter which can easily achieve a broad band of filter characteristics, and a method for producing it.
A still further object of the invention is to provide a volume hologram type of diffraction grating using a photopolymer, which has a broader range of diffraction wavelengths.
The invention is characterized by providing a hologram recording sheet in which at least two hologram materials sensitive to different wavelength regions are formed on different regions on a film in a given pattern, whereby, using laser light of a specific wavelength as a hologram recording light source, the regions diffracting light of different wavelengths can be recorded on the same plane in the form of sets of interference fringes that are independent in the thickness direction of the photosensitive material.
Also, the invention is characterized by providing a hologram recording sheet in which at least two hologram recording materials sensitive to different wavelength regions are laminated on a film through a transparent plastic spacer layer, whereby, using laser light of a specific wavelength as a hologram recording light source, a plurality of regions diffracting different wavelengths can be recorded on the same plane either by simultaneous exposure or by sequential exposure
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Optical Systems 
