Holographic PDLC (polymer dispersed liquid crystal) raster and preparation method thereof

A technology of dispersing liquid crystals and polymers, which is applied in the field of holographic gratings, can solve the problems of high driving voltage and affect the application of devices, and achieve the effect of maintaining response time

Inactive Publication Date: 2014-10-01
SHANGHAI JIAO TONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the driving voltage of the holographic polymer dispersed liquid crystal grating of this techn

Method used

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  • Holographic PDLC (polymer dispersed liquid crystal) raster and preparation method thereof
  • Holographic PDLC (polymer dispersed liquid crystal) raster and preparation method thereof
  • Holographic PDLC (polymer dispersed liquid crystal) raster and preparation method thereof

Examples

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Embodiment 1

[0031] In this example, the prepolymer composed of monomers, crosslinking agents, synergists and photoinitiators is evenly mixed with nematic liquid crystals and then poured into a liquid crystal cell, and photopolymerized in a holographic interference light field to form a holographic Polymer dispersed liquid crystal grating and fix the polymer dispersed liquid crystal grating, then put the liquid crystal cell into the organic solvent to clean the nematic liquid crystal and the residue that has not completely reacted, and then pour the blue phase liquid crystal into the liquid crystal cell to obtain the hologram Polymer dispersed liquid crystal gratings.

[0032] The specific steps of this embodiment include:

[0033] 1. The light field generated by holographic interference technology is as follows: figure 1 As shown, the implementation device includes: recording laser 1-1-1, control switch 1-1-2, five mirrors, beam splitter 1-1-4, sample stage 1-1-7, two recording Light se...

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Abstract

The invention discloses a holographic PDLC (polymer dispersed liquid crystal) raster and a preparation method thereof. The preparation method comprises the following steps: uniformly mixing a prepolymer formed by a monomer, a cross-linking agent, an auxiliary initiating agent and a photo sensitized initiation agent and nematic phase liquid crystal, and injecting the mixture into a liquid crystal box; conducting photopolymerization in a holographic interference optical field to form a holographic PDLC raster, and fixing the PDLC raster; then putting the liquid crystal box in an organic solvent to clean the nematic phase liquid crystal and residue which is not reacted completely; injecting blue phase liquid crystal to the liquid crystal box to obtain the holographic PDLC raster. According to the invention, the obtained holographic PDLC raster can be provided with under millisecond response time by reducing the driving voltage of the holographic PDLC raster.

Description

technical field [0001] The invention relates to a holographic grating applied in the field of visible light wave, infrared wave or ultraviolet wave band, in particular to a holographic polymer dispersed liquid crystal grating and a preparation method thereof. Background technique [0002] Holographic polymer dispersed liquid crystal grating is a new type of functional optical device, which is formed by the photopolymerization reaction of the mixture of nematic liquid crystal, free monomer and photoinitiator in the laser holographic interference light field. In the bright field area where the holographic interference light field causes bright and dark stripes, the photopolymerization reaction of free monomers reduces the concentration of free monomers in this area. In the dark stripes, the photopolymerization reaction of free monomers is less, and The concentration of free monomers is greater than the concentration at the bright stripes. According to the principle of concentr...

Claims

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Application Information

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IPC IPC(8): G02B5/18
Inventor 何正红陈超平袁亚超苏翼凯
Owner SHANGHAI JIAO TONG UNIV
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