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Ferroelectric liquid crystal geometric phase device and preparation system and preparation method thereof

A ferroelectric liquid crystal and preparation system technology, applied in instruments, nonlinear optics, optics, etc., can solve the problems of high driving voltage, difficult material preparation and processing, response time only in the order of milliseconds, etc., to achieve high driving voltage requirements, Avoid the effects of high precision requirements and simple system configuration

Pending Publication Date: 2021-07-20
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In existing liquid crystal geometric phase devices, the response time is only on the order of milliseconds, which cannot meet the industrial application standard
At present, the use of blue phase liquid crystal or cholesteric liquid crystal can shorten the response time, but there are a series of problems such as high driving voltage and difficult material preparation and processing.

Method used

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  • Ferroelectric liquid crystal geometric phase device and preparation system and preparation method thereof
  • Ferroelectric liquid crystal geometric phase device and preparation system and preparation method thereof
  • Ferroelectric liquid crystal geometric phase device and preparation system and preparation method thereof

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Embodiment 1

[0035] A ferroelectric liquid crystal geometric phase device, such as figure 1 As shown, it includes two oppositely arranged glass substrates 2, a photo-control alignment layer 3 located on opposite surfaces of the glass substrates, and a ferroelectric liquid crystal layer 4 located between the glass substrates.

[0036] From figure 1 It can be seen that the ferroelectric liquid crystal layer 4 is composed of ferroelectric liquid crystal molecules with a helical structure, the helical axis pointing structure of the ferroelectric liquid crystal is a geometric phase device structure, and the pitch of the liquid crystal molecular layers is 5 μm.

[0037] The molecular orientation of the optical alignment layer is determined by a ferroelectric liquid crystal optical alignment system based on a spatial light modulator, and its direction is the same as that of liquid crystal molecules or helical axes, and perpendicular to the polarization direction of polarized light.

[0038] The ...

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PUM

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Abstract

The invention discloses a ferroelectric liquid crystal geometric phase device as well as a preparation system and a preparation method thereof. The ferroelectric liquid crystal geometric phase device comprises two oppositely arranged glass substrates, light-operated orientation layers positioned on opposite surfaces of the glass substrates, and a ferroelectric liquid crystal layer positioned between the glass substrates. The ferroelectric liquid crystal layer is composed of ferroelectric liquid crystal molecules of a spiral structure, the spiral axis pointing direction structure of the ferroelectric liquid crystal molecules is a geometric phase device structure, and the distance between the two opposite glass substrates is 5 micrometers. The molecular orientation of the light-operated orientation layer is determined by a ferroelectric liquid crystal light-operated orientation system based on a spatial light modulator, and the direction of the light-operated orientation layer is the same as the direction of a ferroelectric liquid crystal spiral shaft and is perpendicular to the polarization direction of polarized light. The device has the advantages of extremely high responding rate and low driving voltage demand.

Description

technical field [0001] The invention relates to the technical field of geometric phase devices, in particular to a ferroelectric liquid crystal geometric phase device, a preparation system and a preparation method thereof. Background technique [0002] Geometric phase devices have important applications in light field manipulation and optical display. Traditional geometric phase devices mostly use passive devices, and the manufacturing process is complicated and cannot be adjusted. Liquid crystal-based geometric phase devices have the advantages of high diffraction efficiency, small optical thickness, and high integration. [0003] At present, the preparation of liquid crystal geometric phase devices is mostly based on light-controlled alignment technology. Compared with the traditional rubbing alignment technology, this non-contact alignment technology largely avoids dust, static electricity and other impurities in the rubbing alignment technology. problem, and is not lim...

Claims

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Application Information

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IPC IPC(8): G02F1/141
CPCG02F1/141
Inventor 马营尹明奎刘笑雨甘雪涛赵建林
Owner NORTHWESTERN POLYTECHNICAL UNIV
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