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Optical multilayer gradient thin film and preparation device thereof

A technology of optical thin film and gradient film, which is applied in optics, optical components, flat products, etc., can solve the problems of low efficiency and difficulty in ensuring processing accuracy, and achieve simple multi-layer realization, low production cost, and simple design and manufacturing process Effect

Active Publication Date: 2017-05-24
BEIJING UNIV OF CHEM TECH
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

But this production method is inefficient, and it is not easy to ensure the precision of processing

Method used

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  • Optical multilayer gradient thin film and preparation device thereof
  • Optical multilayer gradient thin film and preparation device thereof
  • Optical multilayer gradient thin film and preparation device thereof

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[0022] The present invention proposes an optical multilayer gradient film, in the specific implementation process, such as figure 1 As shown, the optical film is formed by stacking eight groups of unit films, that is, M=4, reflecting two wave bands, and each unit film has polymer materials PMMA and PET alternately forms 50 identical periodic structures, N=50. The first four groups realize high reflection to the ultraviolet band, and the last four groups realize high reflection to the infrared band.

[0023] The unit film satisfies nd=λ / 4, where n is the refractive index of the material, d is the single-layer thickness of the material, and λ is the central wavelength of the unit film.

[0024] In the specific implementation process, if the thickness ratio of the PMMA / PET periodic structure is 1.1, the thickness of the PMMA / PET periodic structure is as follows: the first group is 52.36nm / 47.6nm, the second group is 55.66nm / 50.6nm, and the third group is 58.96nm / 53.6nm, the fo...

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Abstract

The invention discloses an optical multilayer gradient thin film and a preparation device thereof. The optical multilayer gradient thin film is formed by superposing 2M groups of unit films, wherein each unit film comprises N identical periodic structures formed by alternating polymer materials A and B having great difference in refractive index, the refractive index of the polymer material A is n1, and the refractive index of the polymer material B is n2; and the former M groups realize high reflection of a waveband, and the latter M groups realize high reflection to another waveband. The preparation device mainly comprises a melt plastification feeding device, a converging device, a plurality of uniform laminators, a gradient film thickness laminator and a forming device. The optical multilayer gradient thin film and the preparation device thereof utilize the two materials with great difference in refractive index, ad can realize total reflection of various wavebands; and the plurality of uniform laminators and the gradient film thickness laminator are adopted to realize the controllable forming of film thickness, the film thickness reaches a nanometer level, the production cost is low, and the application is very wide. The optical multilayer gradient thin film and the preparation device thereof are simple in manufacturing process and easy in ensuring precision, and greatly improve the material adaptability and manufacturing efficiency.

Description

technical field [0001] The invention relates to the field of film technology, in particular to a novel optical multilayer gradient film and a preparation device thereof. Background technique [0002] Optical film is a film that achieves the effect of changing the transmittance and reflectance of light in a predetermined wavelength band. Generally speaking, the thickness of the film layer is on the order of the wavelength of light, and the effective wavelength band of the optical film can be changed by changing the thickness of the film layer. For a film with a fixed thickness, different wavelengths of light correspond to different optical paths (that is, phase differences), and their intensities after coherent superposition are different, which corresponds to different transmittance and reflectivity. At present, optical thin films have been widely used in the fields of optics and optoelectronics technology to manufacture various instruments with specific optical effects. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B1/10G02B1/04B29C47/06B29C47/14B29K33/00B29K67/00B29L7/00B29C48/305
CPCB29C48/08B29C48/21B29C48/30B29C48/307B29K2033/12B29K2067/003B29L2007/00G02B1/04G02B1/10
Inventor 焦志伟李经龙程祥相臣林承友石美浓丁玉梅杨卫民
Owner BEIJING UNIV OF CHEM TECH
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