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A mode-controlled cascaded liquid crystal microlens array

A liquid crystal microlens and mode control technology, which is applied in nonlinear optics, instruments, optics, etc., can solve the problems of gradient-type refractive index curves not being smooth enough, increase response speed, etc., and achieve the effect of smooth contour and fast response time

Active Publication Date: 2015-12-02
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with the first type of liquid crystal lens in the early stage, the advantage of this type of lens is that the response time is consistent during the focusing process, and there is no light scattering phenomenon. The gap, the thickness of the liquid crystal lens is generally larger, which increases the driving voltage and increases the response speed

Method used

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  • A mode-controlled cascaded liquid crystal microlens array

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Embodiment 1, cascade type liquid crystal microlens concave lens array:

[0024] It includes an upper substrate 1, a lower substrate 2, a liquid crystal layer 6, and a gasket 11. The upper substrate 1 includes, from top to bottom, an upper substrate glass 3, an upper substrate ITO film 4, and an upper substrate alignment layer 5; the lower substrate 2 includes a lower substrate glass 7, a lower substrate ITO film 8, a high surface resistance layer 9, a polymer solid lens and a light alignment layer 10, wherein pattern etching is performed on the lower substrate ITO film 8 according to the required pixel size and shape, figure 1 The circle hole pixel pattern etching is shown, the high surface resistance layer 9 is formed by a ZnO layer with a surface resistance value ranging from 0.1-10MΩ / sq or an ITO layer prepared under specific parameters, and the radius of the polymer solid convex lens 10 is etched with the circle hole. The radii are the same, and the positions are i...

Embodiment 2

[0027] Embodiment 2, cascaded liquid crystal microlens convex lens array:

[0028] The implementation structure diagram is still as figure 1 As shown, what is changed is the refractive index of the polymer lens. In the case of embodiment two (n o e 1 -L 2 1 -L 2 2 / 2(n e -n) h~r 2 / 2(n o -n) h, where r is the radius of the polymer lens.

Embodiment 3

[0029] Embodiment 3, a cascaded liquid crystal microlens array for conversion of concave lenses and convex lenses:

[0030] The example case (n o e ), when not powered, L 1 -L 2 >0, it is a concave lens; in the power-on state, L 1 -L 2 2 / 2(n e -n) h~r 2 / 2(n o -n) h, where r is the radius of the polymer lens.

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Abstract

The invention discloses a mode control cascading-type liquid crystal micro lens array, relates to a liquid crystal micro lens array, and particularly relates to the technical field of mode control cascading-type liquid crystal micro lens arrays. The mode control cascading-type liquid crystal micro lens array comprises an upper substrate, a lower substrate and an internal packaging liquid crystal layer wherein the upper substrate and the lower substrate are arranged in parallel, the upper substrate includes upper substrate glass, a grounding electrode layer and an upper substrate alignment layer, the upper substrate glass, the grounding electrode layer and the upper substrate alignment layer are arranged in sequence, the lower substrate includes lower substrate glass, a contact electrode layer, a high surface resistance layer, a polymer solid lens and light an alignment layer, a gasket is arranged between the upper substrate alignment layer and the contact electrode layer in a distributed mode, and the internal packaging liquid crystal layer is formed by the upper substrate alignment layer, contact electrode layer and a gasket. According to the mode control cascading-type liquid crystal micro lens array, the purposes of being adjustable in focal distance, low in driving voltage and fast in response speed and time are achieved.

Description

technical field [0001] The invention relates to a liquid crystal microlens array, in particular to the technical field of a cascade type liquid crystal microlens array. Background technique [0002] Liquid crystal microlens technology, whose focal length can be controlled by voltage. The traditional solid lens needs to control the change of focal length by adjusting the distance between the lenses through different lens combinations. In comparison, the biggest advantage of liquid crystal microlenses is that they are small in size, eliminating the need for cumbersome mechanical devices, and can obtain adjustable focal length characteristics, also known as adaptive lenses. Therefore, it has great potential application value in the fields of optical interconnection, adaptive optics, optoelectronic storage, integrated optical display and so on. [0003] Common liquid crystal adaptive lenses, in general, have three methods to generate gradient-type refractive index profiles sim...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02F1/29G02F1/1337G02F1/139G02F1/133
Inventor 李青崔勇扬严静胡凯刘佩琳
Owner SOUTHEAST UNIV
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