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Polarized Airy liquid crystal formwork, preparation method and generating system

A liquid crystal and polarization technology, applied in the field of liquid crystal orientation control, which can solve the problems of low resolution, cumbersome steps, and low laser damage threshold.

Active Publication Date: 2015-10-14
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the current research method for generating two-dimensional Airy beams, the steps are cumbersome, and because the electrode structure is generally used, the resolution is low, and the laser damage threshold is also low, so it is not suitable for the generation of Airy beams under strong light conditions.

Method used

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  • Polarized Airy liquid crystal formwork, preparation method and generating system
  • Polarized Airy liquid crystal formwork, preparation method and generating system
  • Polarized Airy liquid crystal formwork, preparation method and generating system

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Embodiment 1

[0047] An embodiment of the present invention provides a polarized Airy liquid crystal template, figure 1 A schematic diagram of a cross-sectional structure of a polarized Airy liquid crystal template provided in Embodiment 1 of the present invention, as shown in figure 1 As shown, the polarized Airy liquid crystal template includes: a first substrate 11 and a second substrate 12 oppositely arranged, and a liquid crystal layer 13 between the first substrate 11 and the second substrate 12; wherein, the first A spacer particle 14 is arranged between the first substrate 11 and the second substrate 12 to support the liquid crystal layer 13; the side of the first substrate 11 and the second substrate 12 adjacent to the liquid crystal layer 13 is provided with a light control Alignment film 15, the photo-controlled alignment film 15 has a cubic phase control pattern whose molecular director direction is periodically and gradually changed, and the width of each cycle of the cubic pha...

Embodiment 2

[0056] Embodiment 2 of the present invention also provides an Airy beam generation system, Figure 8 A schematic structural diagram of the Airy beam generation system provided for Embodiment 2 of the present invention, as shown in Figure 8 As shown, the Airy beam generation system includes: the polarized Airy liquid crystal template 81 described in the above-mentioned embodiments, the light source 82 positioned at the incident side of the polarized Airy liquid crystal template 81 to generate incident light, and positioned at the polarized Airy liquid crystal template 81 to generate incident light. The lens 83 and the imaging device 84 on the light emitting side of the Airy liquid crystal template 81, wherein the optical axes of the light source 82, the polarized Airy liquid crystal template 81, the lens 83 and the imaging device 84 are located on the same straight line. Turn on the light source 82 to emit incident light, and irradiate the incident light of the polarized Airy ...

Embodiment 3

[0061] Embodiment 3 of the present invention also provides a method for preparing a polarized Airy liquid crystal template, Figure 10 A schematic flow chart of a method for preparing a polarized Airy liquid crystal template provided in Embodiment 3 of the present invention, as shown in Figure 10 shown. The methods include:

[0062] Step 110, forming a photo-alignment film on one side of the first substrate and the second substrate;

[0063] Optionally, before forming the photo-controlled alignment film, in order to increase the wettability and adhesion between the photo-controlled alignment film and the first substrate and the second substrate, use ITO (indium tin oxide conductive film) washing solution (acetone, alcohol, etc.) Mixed reagents) were ultrasonically cleaned for 30 minutes, and then ultrasonically cleaned twice with ultrapure water for 10 minutes each. After drying in an oven at 120° C. for 40 minutes, UVO (ultraviolet ozone) cleaning was performed for 30 min...

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Abstract

The invention discloses a polarized Airy liquid crystal formwork, a preparation method and a generating system. The polarized Airy liquid crystal formwork comprises a first substrate, a second substrate and a liquid crystal layer located between the first substrate and the second substrate, wherein the first substrate and the second substrate are oppositely arranged. Interval particles are arranged between the first substrate and the second substrate so as to support the liquid crystal layer. Light-controlled orientation films are arranged on the sides of the first substrate and the second substrate adjacent to the liquid crystal layer and are provided with cubic phase control graphs with molecular director directions in periodic gradual change distribution, the widths in each period of the cubic phase control graphs are gradually reduced from the center areas of the control graphs to two sides, the control graphs of the light-controlled orientation films control liquid crystal molecular directors in the liquid crystal layer to be in periodic 0-180-degree gradual change distribution, so that incident light shining the polarized Airy liquid crystal formwork is converted into Airy light beams, and the laser-damaged threshold of the polarized Airy liquid crystal formwork and the stability of the polarized Airy liquid crystal formwork in the presence of hard light are improved.

Description

technical field [0001] The invention relates to the technical field of liquid crystal orientation control, in particular to a polarized Airy liquid crystal template, a preparation method and a production system. Background technique [0002] Diffraction is the basic characteristic of the beam. Due to the diffraction, the spot of the laser beam gradually increases and the energy gradually disperses during the transmission process. With the continuous expansion and deepening of laser applications in long-distance transmission fields such as communications and military affairs, people increasingly hope to eliminate diffraction and reduce the transmission dissipation of laser beams. [0003] In recent years, Airy beams have made up for the shortcomings of Gaussian beams due to their non-diffraction, self-acceleration and self-healing properties, and can be widely used in military, biological, medical, atmospheric science and other fields, which has attracted more and more attent...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/1337
CPCG02F1/133788
Inventor 胡伟魏冰妍陈鹏陆延青徐飞
Owner NANJING UNIV
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