Dynamic amplifying optical film of flat Fresnel lens array

A technology of Fresnel lens and optical film, applied in optics, lens, magnifying glass, etc., can solve the problems of disappearing magnification effect of dynamic optical film, damage of safety film, inability to print ink directly, etc.

Active Publication Date: 2015-05-13
SVG TECH GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the microlens array is exposed to the air without a protective layer, it is easy to cause damage to the safety film and shorten its service life
[0006] Chinese patent application 200510086954.X discloses a microlens array of the Fresnel zone plate type to make a flat magnifying glass with microtext, but it must be used in conjunction with the microtext or pattern of the corresponding array
The sagittal height of the microlens array makes it impossible to print ink directly on the surface of the microlens array, otherwise, in the printing area, the sagittal height part is filled with ink, so that the magnification effect of the dynamic optical film will disappear

Method used

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  • Dynamic amplifying optical film of flat Fresnel lens array
  • Dynamic amplifying optical film of flat Fresnel lens array
  • Dynamic amplifying optical film of flat Fresnel lens array

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] ginseng figure 1 Shown is a schematic structural view of a plane Fresnel lens array dynamic magnification optical film in Embodiment 1 of the present invention, including a substrate layer 1, a Fresnel lens array layer 2 and a micrographic layer 3, and a Fresnel lens array layer 2 and The micropattern layer 3 is respectively located on the upper surface and the lower surface of the substrate layer 1 .

[0056] With reference to the photolithography equipment and photolithography method recorded in the Chinese patent application whose application number is CN201310166341.1, such as figure 2 As shown, the Fresnel lens array layer can be prepared by the above-mentioned interference lithography, the Fresnel lens array layer is composed of several Fresnel lenses arranged in an array, and the Fresnel lens includes the first Fourier transform arranged in sequence along the optical axis 25 A lens 21, a Fresnel phase element 22, a second Fourier transform lens 23, an output su...

Embodiment 2

[0063] ginseng Figure 4 Shown is the schematic structural diagram of the plane Fresnel lens array dynamic amplification optical film in the second embodiment of the present invention. Compared with the first embodiment, in this embodiment, a high refractive index film is evaporated on the outside of the Fresnel lens array layer 2. The dielectric layer 4 is the same as that of the first embodiment, and will not be repeated here. In this embodiment, various patterns can be directly printed on the high refractive index medium layer 4, and the high refractive index medium layer 4 can also be used as a protective layer for the Fresnel lens array layer.

[0064] The nano-Fresnel lens belongs to the planar process, and a high-refractive-index medium, such as ZnS medium, is vapor-deposited on the Fresnel lens array layer, and its refractive index is about 2.0. According to the grating equation, if the incident wavelength is 550nm and the incident wavelength is vertical, the edge per...

Embodiment 3

[0066] Different color inks are applied to different areas of the Fresnel lens array layer 2, which can be combined with the color of the ink filled in the micrographic layer 3. On the upper and lower surfaces of the integrated imaging optical film, the color of the micro graphics is different from the color printed on the surface, which can form a dynamic graphic effect of two different color combinations.

[0067] ginseng Figure 5 As shown, in the present embodiment, the Fresnel lens array layer 2 is divided into a first area 201 and a second area 202, and different inks are printed on the first area 201 and the second area 202, such as painting blue transparent ink on the first area 201 Ink, red transparent ink is printed on the second area 202 . The Fresnel lens itself has a dispersion effect, and when it converges light of different wavelengths, the corresponding focal length is different. Then the focal length of the required Fresnel lens can be adopted according to t...

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Abstract

The invention discloses a dynamic amplifying optical film of a flat Fresnel lens array. The optical film comprises a substrate layer, a plurality of Fresnel lens array layers positioned above the substrate layer, and a plurality of micro-pattern layers positioned below the substrate, wherein each Fresnel lens array layer consists of a plurality of Fresnel lenses which are arranged in an array; the distance between the Fresnel lens array layers and the micro-pattern layers is the focus distance of each Fresnel lens. According to the dynamic amplifying optical film disclosed by the invention, patterns in the micro-pattern layers are amplified and reproduced because of the imaging effect of the Fresnel lenses; the reproduced and amplified image has a dynamic three-dimensional effect.

Description

technical field [0001] The invention relates to the technical field of optical anti-counterfeiting and dynamic safety film, in particular to a dynamic magnifying optical film of a plane Fresnel lens array, which can be applied to banknotes, cards, securities, security documents, etc., and brand products with high added value. Optical security. Background technique [0002] Optical anti-counterfeiting technology has remarkable visual recognition and is easy to be recognized by the public. It is widely used in brand products, important security documents, card securities and other fields involving economic interests and public safety. Laser holographic anti-counterfeiting technology was once internationally recognized as a promising anti-counterfeiting technology and indeed played an important anti-counterfeiting role. However, with the popularization of technology, many manufacturers have the ability to produce and use this technology, which reduces its anti-counterfeiting fu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B3/08G02B25/00B42D25/30
CPCG02B3/08G02B25/008
Inventor 刘艳花申溯袁晓峰朱鹏飞朱铭楼益民浦东林陈林森
Owner SVG TECH GRP CO LTD
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