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Method for making lattice holographic rainbow optically-variable image

A production method and plain surface technology, which is applied in the direction of instruments, can solve the problems of difficulty in meeting application requirements and inlaying other images, and achieve the effect of easy acquisition and lower technical requirements

Active Publication Date: 2012-07-18
SUZHOU UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] On the other hand, with the continuous deepening of market applications, the aesthetic effect of the original plain grating can no longer meet the application requirements. In terms of use function, it is necessary to have both the aesthetic effect of plain rainbow and anti-counterfeiting function. Various light-changing images with dynamic, stereo and encryption are added to the rainbow grating
It is very difficult to inlay other images, especially dynamic light-variable images, on the above-mentioned holographic interference method for making plain rainbow gratings, so it is difficult to meet the above application requirements

Method used

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  • Method for making lattice holographic rainbow optically-variable image
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  • Method for making lattice holographic rainbow optically-variable image

Examples

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Embodiment 1

[0046] Example 1: see attached Figure 4 to the attached Figure 10 As shown in the figure, a method for making a rainbow light-change image on a dot matrix surface includes the following steps:

[0047] (1) Prepare an optical element with orthogonal light spot output, the effective area of ​​which is not less than 5 mm × 5 mm, not more than 15 mm × 15 mm, and the orthogonal light spot output refers to the four orthogonal light spot diffraction terms ( 1,0)(-1,0)(0,1)(0,-1);

[0048] (2) Construct a 4F optical system, the light emitted by the laser light source is treated as incident light after collimation and diaphragm, place the recording material at the image plane position of the 4F optical system, and place the optical element obtained in step (1) in its transform On the plane, as a beam splitting element, the incident light is divided into four beams. After being imaged by the lens group, an interference fringe unit is formed on the surface of the recording material, ...

Embodiment 2

[0060] Embodiment 2: a method for making a dot matrix element plane rainbow optically variable image, comprising the following steps:

[0061] (1) Prepare an optical element with orthogonal light spot output, the effective area of ​​which is not less than 5 mm × 5 mm, not more than 15 mm × 15 mm, and the orthogonal light spot output refers to the four orthogonal light spot diffraction terms ( 1,0)(-1,0)(0,1)(0,-1);

[0062] (2) Construct a 4F optical system, the light emitted by the laser light source is treated as incident light after collimation and diaphragm, place the recording material at the image plane position of the 4F optical system, and place the optical element obtained in step (1) in its transform On the plane, as a beam splitting element, the incident light is divided into four beams. After being imaged by the lens group, an interference fringe unit is formed on the surface of the recording material, wherein the front focal length of the 4F optical system is grea...

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Abstract

This invention relates to a method for making lattice holographic rainbow optically-variable image, which comprises the following steps: (1) preparing an optical element with orthogonal light spot output; (2) building a 4F optical system with a laser of short coherent length, putting the former element on the transformation plane to split the incident beam into four beams as a beam-splitting element; forming the interface band unit on record material surface by lens imaging; (3) changing the relative position of the optical system and record material to record the interface band unit and point-by-point photo etch the prime grating. This invention reduces the manufacture technique request greatly, can obtain different diffraction effects, and inlays with the digital optical-variable image mutually.

Description

technical field [0001] The invention relates to a process and equipment for obtaining a holographic image, in particular to a method for making a dot-matrix plain rainbow (large-scale orthogonal rainbow) optically variable image. Background technique [0002] In the application of laser holography, since the orthogonal grating can observe the rainbow effect at any angle, the large-scale orthogonal rainbow effect (plain rainbow grating) material has become the most widely used and most important laser material at present. Large-scale applications in printing, packaging, mobile phones and home appliances. [0003] The production method of the traditional plain rainbow light change image, see attached figure 1 , the laser beam generated by the laser light source 1 is divided into two beams by the beam splitter 7 , and expanded by the mirrors 17 , 18 , 19 and the beam expanders 20 , 21 to form interference on the photoresist dry plate 22 . After one exposure, the photoresist d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G03H1/04
Inventor 陈林森周小红魏国军解正东汪振华解剑锋邵洁
Owner SUZHOU UNIV