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Hologram making method and hologram made by the method

A production method and hologram technology, applied in the field of holograms, can solve the problems of poor safety and easy forgery, and achieve the effects of enhancing safety, reducing production processes, and having superior safety.

Active Publication Date: 2013-05-08
DAI NIPPON PRINTING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, although the above-mentioned conventional computer holograms proposed so far are holograms superior in design and security, they are relief-type holograms, which are more likely to be counterfeited than volume-type holograms. poor sex

Method used

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  • Hologram making method and hologram made by the method
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Embodiment Construction

[0037] Hereinafter, a method for producing a hologram according to the present embodiment will be described with reference to the drawings.

[0038] In this embodiment, firstly, a computer-synthesized hologram is produced figure 1 . Figure 1 ~ Figure 3 Indicates making computer-synthesized holograms figure 1 Methods.

[0039] First, in this embodiment, a computer-synthesized hologram recorded using object light spreading only in a predetermined one-dimensional direction from a point light source set on a recording object is used as the computer-synthesized hologram. This production method is based on the method described in Patent Document 1. That is, if figure 1As shown, it is assumed that object light Oi emitted from an arbitrary point light source Pi on the original image O spreads only in the horizontal direction (in a plane parallel to the XZ plane) as shown in the figure. Then, the object light Oi reaches only the linear region B on the recording medium 1 , and the...

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PUM

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Abstract

The invention provides a hologram fabrication process, characterized by comprising steps of fabricating a computer-generated hologram (CGH) having amplitude information and phase information recorded by computer operation on a given recording surface, irradiating the computer-generated hologram (CGH) with the first reconstructing illumination light (2) to generate the first diffracted light (3) from the computer-generated hologram (CGH) thereby reconstructing a first reconstruction image (O′), simultaneously entering the first diffracted light (3) and the first reference light (4) in a first-stage hologram recording material (11) faced away from the first reconstructed image to record a first-stage hologram (11) in it, irradiating the recorded first-stage hologram (11) with the second reconstructing illumination light (5) to generate the second diffracted light (6) from the first-stage hologram (11) thereby reconstructing the second reconstruction image (O″), and simultaneously entering the second diffracted light (6) and the second reference light (7) in a second-stage hologram recording material (21) located near the second reconstructed image (O″) to record the second-stage hologram (21) in it as a reflection or transmission type volume hologram.

Description

technical field [0001] The present invention relates to a method for producing a hologram and a hologram produced by the method, in particular to a method for producing a volume hologram in which a reproduced image of a computer-synthesized hologram is recorded, and a hologram produced by the method. Background technique [0002] Conventionally, in order to prevent counterfeiting, it is known that holograms are provided on exchange vouchers, credit cards, and the like. As such a hologram, there is a computer hologram (CGH) produced by forming interference fringes on a predetermined recording surface through calculation using a computer (Patent Document 1). [0003] Patent Document 1: Japanese Patent Application Publication No. 2000-214751 [0004] Patent Document 2: Japanese Patent Application Publication No. 2002-72837 [0005] Patent Document 3: Japanese Patent Application Publication No. 2005-215570 [0006] Non-Patent Document 1: "3-Dimensional Image Conference '99-3D...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G03H1/04
CPCB42D2035/22G03H2001/0415G03H2001/0413G03H1/202G03H1/08B42D25/328G03H1/0011G03H1/20G03H1/28
Inventor 熊泽诚子仓重牧夫北村满渡部壮周
Owner DAI NIPPON PRINTING CO LTD
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