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Hologram based on Moire fringe technology, and its plate making and identifying method

A moiré fringe and hologram technology, which is applied to optical components, optics, instruments, etc., can solve the problems of difficult details or technical parameter authenticity identification, high difficulty of imitation, and inconvenient identification of hologram authenticity, etc., to achieve the identification method Simple, low-cost results

Inactive Publication Date: 2012-02-29
SHANDONG TAIBAO PREVENTING COUNTERFEIT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage is: this technology is easy to be deciphered, and the imitation effect is equivalent to the genuine effect
The disadvantage is: once it is counterfeited, it is difficult to identify the authenticity of the details or technical parameters
The disadvantages are: the content of the miniature information is not easy to disclose; the identification is only based on whether there is a miniature information, and there is a lack of further identification requirements for the miniature information
The dynamic mode of the dynamic moiré fringe is difficult to control, so the dynamic moiré hologram produced in this way has great randomness
Its advantage is that it is extremely difficult to imitate, because a slight difference in the spatial frequency of the grating will produce obvious differences in Moiré fringes; the disadvantage is that it is difficult to describe the dynamic effect exactly, and it is inconvenient to determine the authenticity of the hologram

Method used

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  • Hologram based on Moire fringe technology, and its plate making and identifying method
  • Hologram based on Moire fringe technology, and its plate making and identifying method
  • Hologram based on Moire fringe technology, and its plate making and identifying method

Examples

Experimental program
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Effect test

Embodiment

[0043] 1) plate making

[0044] Using CorelDRAW software, a set of line segments with a bar-to-space ratio of 1:1 was generated at 200 lines / inch. Process (embed or hide) the graphic information in the line segment to form figure 2 ;Use CorelDRAW software to randomly distort the line segments to form image 3 . Will figure 2 , 3 Made on the transparent silver salt photosensitive material to make two grids of the present invention.

[0045] The two grids overlap and keep a distance of 3mm to produce moiré fringes, such as figure 1 As shown, on the holographic recording material 4, when moving from position a to c, from the perspective of the observer, it is equivalent to the relative movement of the grids 2 and 3, so dynamic Moiré fringes can be observed, and then the holographic recording The method records the dynamic moiré fringes. Make masters according to existing techniques.

[0046] 2) According to the master plate prepared in step 1), a white light reproductio...

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PUM

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Abstract

The invention discloses a Morie-fringe technology-based holograph, which belongs to the field of holographic anti-counterfeiting technology. The Morie-fringe technology-based holograph is characterized in that the method for making the holograph comprises a substrate which records dynamic Morie fringes into the holograph by a holographic recording method to make the holograph; and the holograph is a white light reconstructed holograph which shows image-text information and the dynamic Morie fringes under a point light source. The Morie-fringe technology-based holograph is simple and quick in verification when used on paper money, bank notes, ID cards, passports, commercial papers, tickets, product labels and product packages. And the possibility of the counterfeit of the holograph of the invention is extremely low.

Description

technical field [0001] The invention belongs to the field of holographic anti-counterfeiting technology, and in particular relates to a hologram based on Moiré fringe technology and its plate making and identification methods. Background technique [0002] Hologram (Hologram) was proposed by Gabor in 1948. With the advent of lasers in 1962, Leith and Upatnix invented off-axis holography. In 1969, Benton (Benton) invented rainbow holography, a holography using white light as a display light source. This invention is a welcome first step for holograms to go out of the laboratory and into the society. Due to the high information carrying capacity of laser holographic photosensitive materials, which can record three-dimensional images, dynamically changing images and other tasks that are difficult to complete by ordinary printing technologies, people have widely used holography in the field of anti-counterfeiting and achieved gratifying results. Up to now, holographic printing ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B5/32G02B27/60
Inventor 盖树建田辰琪田家密
Owner SHANDONG TAIBAO PREVENTING COUNTERFEIT
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