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Light Responsive Security Elements

A security element and lighting technology, which is applied in the field of optical security, can solve problems such as image blur, restrict security performance, increase the thickness of security components, etc., achieve high anti-copy performance, high security performance, and achieve ultra-thin effects

Active Publication Date: 2018-12-21
楼瑾
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Whether the above-mentioned security element based on the principle of Moiré magnification is a transmissive system or a reflective system, regardless of the size of the array period and the pattern arrangement, it is necessary to set the micro graphic unit near the focal plane of the microlens array system, otherwise the image will be blurred. Blurred or even impossible to image
This structural limitation not only increases the overall thickness of the security element, but also makes it impossible for the security element to respond to lighting changes, thus restricting its security performance.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0069] see Figure 1 to Figure 2 as shown, figure 1 It is a schematic cross-sectional view of the structure of the security element under the lighting condition of a point light source in this embodiment. The light-responsive security element in this embodiment is composed of a layer of focusing element array layer 1, a substrate layer 2 and a layer of micropattern array layer 3 The film-type security element 10 is formed by bonding the layers to each other. The focusing element array layer 1 is formed by orthogonal arrangement of focusing units, the focusing units are spherical lens units 4, and the array period is T microns. The micro-pattern array layer 3 is composed of micro-pattern units 5 arranged orthogonally, and the array period is 1.003T microns. The symmetry axis of the focusing element array and the symmetry axis of the micro pattern unit array are parallel to each other. The micro-pattern array layer 3 and the focusing unit array layer 1 are located on both sid...

Embodiment 2

[0072] see Figure 3 to Figure 4 as shown, image 3 It is a schematic cross-sectional view of the structure of the security element under the lighting condition of a point light source in this embodiment. The light-responsive security element in this embodiment is composed of a focusing element array layer 1, a micro-pattern array layer 3, and a substrate layer 2. The film-type security element 10, the layers are bonded to each other to form the film-type security element 10. The focusing element array layer 1 is composed of spherical lens units 4 arranged orthogonally, and the array period is T microns. The micro-pattern array layer 3 is composed of micro-pattern units 5 arranged orthogonally, and the array period is 0.995T microns. The symmetry axis of the focusing element array and the symmetry axis of the micro pattern unit array are parallel to each other. The micro-pattern array layer 3 and the focusing unit array layer 1 are located on the same side of the substrate ...

Embodiment 3

[0075] see Figure 5 to Figure 6 as shown, Figure 5 It is a schematic cross-sectional view of the structure of the security element under the lighting condition of a point light source in this embodiment. In this embodiment, the security element is composed of a focusing element array layer 1, a substrate layer 2, and a micro-pattern array layer 3. Each of the The layers are bonded to each other to form the film-type security element 10 . The focusing element array layer 1 is composed of spherical lens units 4 arranged orthogonally, and the array period is T microns. The micro-pattern array layer 3 is composed of micro-pattern units 5 arranged orthogonally, and the array period is 1.005T microns. The symmetry axis of the focusing element array and the symmetry axis of the micro pattern unit array are parallel to each other. The micro-pattern array layer 3 and the focusing element array layer 1 are located on both sides of the substrate layer 2, and the micro-pattern array ...

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Abstract

The invention relates to the field of optical safety technology, in particular to a light illumination response safety element which comprises at least one focusing element array layer, a base material layer and at least one micropattern array layer, wherein the at least one focusing element array layer, the base material layer and the at least one micropattern layer are mutually spliced to form a thin-film type safety element; the focusing element array layer is formed by arraying focusing element units; the micropattern array layer is formed by arraying micropattern units; at least part of the micropattern units is not within the focal depth range of the focusing element array; at least part of the safety element generates an image under illumination of a light source; the image is generated through the comprehensive amplification imaging function of the focusing element array layer by the micropattern array layer and disappears when the light source is turned off; and the image generated by the at least part of the safety element generates dynamic real-time response on direction variation of the light source. The light illumination response safety element has light illumination response function, higher anti-copy performance and high safety performance, can realize ultrathin, and can be easily integrated with a to-be-protected product.

Description

technical field [0001] The invention relates to the field of optical security technology, in particular to a light-responsive security element, which can be used for anti-counterfeiting marks of currency, checks, securities, certificates, certificates, cards and other important objects. Background technique [0002] With the advancement of manufacturing technology, especially high-precision printing and printing technology, more and more exquisite replicas can be produced at low cost, which poses great challenges to intellectual property and brand protection. In the long-term struggle against counterfeit and shoddy products, people have designed and developed a variety of optical anti-counterfeiting technologies, including watermarks, optically variable inks, holograms, and diffractive optically variable images. The watermark effect is easily imitated by high-performance printing equipment, and the material of the optically variable ink is easy to spread, and the anti-counte...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B42D25/30
CPCB42D25/30
Inventor 楼瑾
Owner 楼瑾