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Liquid crystal beam deflection and scanner and method

A scanner, liquid crystal technology, applied in instruments, optics, nonlinear optics, etc., can solve the problems of limited efficiency, large size, and high difficulty in operation

Active Publication Date: 2019-08-16
南京晶萃光学科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This technology faces many disadvantages, including complex overall device, bulky size, difficult operation, limited efficiency, small controllable angle range, and high cost.

Method used

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  • Liquid crystal beam deflection and scanner and method
  • Liquid crystal beam deflection and scanner and method
  • Liquid crystal beam deflection and scanner and method

Examples

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Comparison scheme
Effect test

Embodiment 1

[0037] An embodiment of the present invention provides a liquid crystal beam deflection and scanner, wherein the schematic diagram of the cross-sectional structure of the liquid crystal wedge cell is shown in figure 1 As shown, the liquid crystal wedge cell includes: two substrates 11 arranged oppositely (the substrate along the horizontal direction is the first substrate, and the substrate in the inclined direction is the second substrate), the substrate is made of conductive ITO glass, and one side of the ITO electrode faces inward. The liquid crystal layer 14 is sandwiched between the two substrates; wherein, spacer particles 13 are arranged between the two substrates to support the liquid crystal layer 14; the sides of the two substrates 11 adjacent to the liquid crystal layer 14 are respectively provided with a light control alignment film 12, The direction of the molecular director of the layer photo-alignment film is uniformly arranged, and the liquid crystal molecules i...

Embodiment 2

[0053] The embodiment of the present invention provides a liquid crystal beam deflection and scanner, in which the schematic cross-sectional structure of the first-stage combination of the liquid crystal polymer polarization grating and the adjustable liquid crystal half-wave plate is as follows Figure 3-1 As shown, it includes: two substrates 33 opposite to each other (the one away from the liquid crystal polymer 31 is the first substrate, and the one adjacent to the liquid crystal polymer 31 is the second substrate), the substrate 33 is made of conductive ITO glass, and the side of the ITO electrode faces the One side of the liquid crystal half-wave plate layer is adjusted, and the liquid crystal layer 34 located between the two substrates 33 is sandwiched; the upper surface of the second substrate is coated with a layer of liquid crystal polymer 31, and the two substrates 33 are adjacent to the liquid crystal layer 34 and the liquid crystal polymer layer 31 The photo-contro...

Embodiment 3

[0074] An embodiment of the present invention provides a liquid crystal beam deflection and scanner, wherein the electronically controlled beam deflection of the first-stage combination of the liquid crystal polymer polarization grating and the adjustable liquid crystal half-wave plate is as follows: Figure 5 shown. For the polarization grating, when the incident light is linearly polarized, the zero order is completely suppressed under the half-wave condition, and there are only positive and negative first order diffraction orders, the efficiency is 50% respectively, and the polarization state is mutually orthogonal circular polarization; When the incident light becomes circularly polarized, there is only one first-order diffraction order of the circular polarization whose polarization state is orthogonal to the incident light, and the efficiency is 100%.

[0075] Based on this principle, the liquid crystal polymer polarization grating and the adjustable liquid crystal half-...

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Abstract

The invention discloses a liquid crystal light beam deflection and scanning device. The device comprises a wedged liquid crystal box, a liquid crystal polymer polarization grating and adjustable liquid crystal half-wavelength plate combination and a quarter-wave plate, wherein a liquid crystal layer is arranged between two oppositely arranged base plates of the wedged liquid crystal box; light-alignment films with molecules pointing to the vector direction and uniformly distributed are arranged on the sides, adjacent to the liquid crystal layer, of the two base plates, and molecules on the liquid crystal layer are uniformly distributed and in parallel with the first base plate; the liquid crystal polymer polarization grating and adjustable liquid crystal half-wavelength plate combination is provided with two parallel base plates, a liquid crystal layer and liquid crystal polymers, the light-alignment films with molecules pointing to the vector direction and uniformly distributed are arranged on the sides, adjacent to the liquid crystal layer, of the two base plates, and light-alignment films with molecules pointing to the vector direction and gradually changing periodically are arranged on the sides, adjacent to the liquid crystal polymer layer of the two base plates; the quarter-wave plate is used for converting linearly polarized light into circularly polarized light. Continuous light beam deflection and scanning in a large angle range can be realized by means of the liquid crystal light beam deflection and scanning device.

Description

technical field [0001] The invention relates to the technical field of beam deflection and scanning, in particular to a liquid crystal beam deflection and scanner and a method thereof. Background technique [0002] In recent years, more and more attention has been paid to the shaping and regulation of light. In particular, the deflection and scanning of light beams have always been the hotspots of everyone's research, and they play a very critical role in both scientific research and production and life. For example, it can be widely used in optical manipulation, laser processing, optical communication, etc., so the research on beam deflection and scanner has important practical significance. [0003] In the prior art, a specific mechanical device is often used to control the deflection direction of the light beam through its rotation. This technology faces many disadvantages, including complex overall device, bulky size, difficult operation, limited efficiency, small cont...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02F1/1335
CPCG02F1/133528
Inventor 葛士军程志华
Owner 南京晶萃光学科技有限公司
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