Photosensitive film used for holographic recording and manufacturing method

A technology of thin film materials and photosensitive polymers, which is applied in the field of photosensitive materials, can solve the problems of photosensitive plates that need to be produced on-the-go, low reflection efficiency, and short storage life, and achieve the effects of small impact, high reflection efficiency, and long storage life

Active Publication Date: 2007-09-12
SHANGHAI TECHSUN ANTI COUNTERFEITING TECH HLDG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But it also has many deficiencies, such as low sensitivity, short storage life, photosensitive plate needs to be produced at any time, and the material needs wet processing after imaging, and the hologram is greatly affected by the environment. Easy to fade in high humidity environment
And photopolymer materials, such as the photopolymer in the material disclosed in US3,658526 patent, although they can overcome the shortcomings of silver salt and dichromated gelatin, they only have limited visual response to visible light, which is affected by resolution. Has been limited to transmission holograms, when used in reflection holograms, the reflection efficiency is very low

Method used

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  • Photosensitive film used for holographic recording and manufacturing method
  • Photosensitive film used for holographic recording and manufacturing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] Under the red safety light with wavelength greater than 600nm, the film-forming agent polyvinyl acetate butyl acrylate acrylic acid terpolymer, 6 grams (67.3wt%), monomer N-vinyl carbazole 1.2 grams (13.5wt%) %), monomer tricyclodecane dimethanol diacrylate 1.0 gram (11.2wt%), photoinitiator 2,4, 0.2 gram (2.2wt%) of 6-triphenyl imidazolyl doublet, photosensitizer two Ethylamino-benzylidene cyclopentanone 0.05 gram (0.57%), chain transfer agent 2-mercaptobenzothiazole 0.15 gram (1.68wt%), ultraviolet absorber 2-hydroxyl-4-methoxybenzophenone 0.05 gram (0.56wt%), nonionic surfactant Fluorad FC-44300.06 gram (0.67wt%), plasticizer diethyl sebacate 0.2 gram (2.2wt%) adds mixed solution (butanone: dichloro Methane:methanol=5:1:1, weight ratio), the weight solid content is 10%, stirred at room temperature until dissolved, the measured viscosity is 10-12cp (25°C), filtered to obtain photosensitive coating A, ready for use;

[0053] Choose 50 μm high-transparency PET film as ...

Embodiment 2

[0058] Under the red safety light with wavelength greater than 600nm, the blend of film-forming agent polyvinyl butyral and cellulose acetate, 2.5 grams (30.5wt%), monomer N-vinylcarbazole 2.8 grams (34.1wt%) %), 1.7 grams (20.7wt%) of diacrylate of bisphenol A of monomer ethoxylation, 0.54 grams (6.6wt%) of photoinitiator isobutyl benzoin ether, photosensitizer Michler's ketone 0.12 grams (1.46wt%), chain transfer agent 2-mercaptobenzothiazole 0.23 grams (2.8wt%), UV absorber 2-hydroxyl-4-methoxybenzophenone 0.06 grams (0.73wt%), non-ionic surface Activator methoxypolyethylene glycol 0.06 gram (0.73wt%), plasticizer diethyl sebacate 0.2 gram (2.4wt%) is added to mixed solution (butanone: dichloromethane: methyl alcohol=5: 1 : 1, weight ratio), the weight solid content is 32.4%, stirred at room temperature until dissolved, the measured viscosity is 28.3cp (25°C), filtered to obtain photosensitive coating A, stand-by;

[0059] Select a 36 μm high-transparency PET film as the b...

Embodiment 3

[0063] The evaluation of photosensitive polymer film C can refer to the method in Figure 2, and the holographic imaging recording can be performed on the photosensitive polymer film through coherent light "on-axis" recording technology.

[0064] The above-mentioned photosensitive polymer film C is cut into sheets of 30*30 mm, and after the surface protection film (4) is peeled off, it is evenly pasted on the reflector (43). With an argon ion laser (514nm) as the light source, the beam (300) passes through a beam expander (41) with a pinhole filter and an aspherical collimating convex lens (42) to form a parallel beam (301) and radiates on the photosensitive polymer film C , the flat light (301) is incident from the base film (1), passes through the buffer layer (2) and the photosensitive paint layer A (3) and reaches the mirror (43), and is reflected back to the photosensitive paint layer A (3) in the original path to form a record raster. Radiation diameter is 15mm. Reflect...

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Abstract

The invention opens the film and the photosensitive preparation methods for a reflection holographic recording, the reflection holographic film-coated membrane including basilemma and the buffer layer on the side of the basilemma, the photosensitive polymer coating formation of photosensitive polymer coating coated on the other side of the buffer layer, or two-color holographic images of the interference fringes Graphic recorded in the photosensitive polymer coating. What film is a kind of image photosensitive materials formed by two different refractive index polymers, where coherent beam through the interference into the recording media, a radical polymerization excited by monomer to get a high diffraction efficiency holographic images. The holography photosensitive film, with good sensitivity and high reflection efficiency, long storage life, hologram by the environmental impacts of small, unlike conventional photosensitive material handling the wet method, which has a record images only through enhanced light-cured and thermal processing, can be achieved reflection efficiency greater than 95 % of the reflection hologram images or dual color images, suitable for the mass production.

Description

technical field [0001] The present invention relates to a photosensitive material for reflection holographic recording. Background technique [0002] The three-dimensional image formed by holographic recording technology has been widely used as an anti-counterfeiting mark on various commodities to combat counterfeit and inferior commodities. It can also be used as art ornaments, optical components, head-up optical components, information storage and other technologies . [0003] The production of reflection holograms is limited to the fact that the recorded interference fringes are different from rainbow holograms, most of which are parallel to the surface of the recording medium, and cannot be copied mechanically, but can only be copied optically. There are many types of materials used to record reflection holograms, but there are fewer ideal recording materials, and fewer materials that can be used for large-scale production. More generally, silver salts and gelatin dich...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03F7/00G03H1/02
CPCG03H1/02G03H1/0252G03H2001/0264G03H2001/0417G03H2001/2615G03H2250/39G03H2260/12
Inventor 徐良衡高芸沈杨游仁顺
Owner SHANGHAI TECHSUN ANTI COUNTERFEITING TECH HLDG
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