Preparation of micro-nano lens array with adjustable light transmittance ratio

A technology of microlens array and light transmittance, which is applied in the field of microlens array, can solve the problem that the light transmittance of microlenses is different, and achieve the effect of low production cost, simple preparation device and easy control

Inactive Publication Date: 2009-07-15
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In some cases, the size of the working area is changed, and the requirements for the light transmittance of each microlens are also different, and the existing microlenses (arrays) cannot meet the requirements.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0022] The preparation method comprises the following steps:

[0023] 1. Prepare oil phase and water phase solutions

[0024] There are two types of oil phase solution

[0025] 1) The polymer is dissolved in an organic solution to form a polymer solution, and the liquid crystal is added into the polymer solution and stirred evenly. Wherein the concentration of the polymer in the solution is 3%~7% mg / ml, wherein the polymer is polystyrene (PS), or polycarbonate (PC), or polymethyl methacrylate (PMMA), or poly Dimethylsiloxane (PDMS); the liquid crystal is E7, or E8, or 5CB, or 6CB, or 7CB, or a mixed liquid crystal of these liquid crystals and light-responsive low-molecular liquid crystals of azobenzene functional groups, light The responsive low-molecular liquid crystal can be BMAB, or BHAB, or BHMB. The organic solvent is benzene, or ethylene dichloride, or a mixed solution of benzene and ethylene dichloride, or a mixed solution of toluene and ethylene dichloride.

[0026...

Embodiment 1

[0032] Embodiment 1: The polymer is polystyrene (PS), and the liquid crystal is E7 mixed with photosensitive liquid crystal BMAB to prepare polymer-dispersed liquid crystal microspheres and arrange them into microlenses (array).

[0033] ①Dissolve polystyrene (PS) in a mixed solvent of dichloroethane and benzene at a concentration of 7%, and the mixing ratio of dichloroethane and benzene is 1:1;

[0034] ② Mix E7 and small molecule liquid crystal BMAB evenly at a volume ratio of 96.5:3.5, and add them to the polymer solution so that the weight ratio of the polymer to the liquid crystal in the solution is 3:2;

[0035] ③Set the inner diameter of the oil phase inlet to 500 μm, and the inner diameter of the water phase inlet and outlet to 1000 μm;

[0036] ④ Inject 5% polyvinyl alcohol solution into the T-shaped channel through the electromagnetic pump interface 2. After removing the air in the device, control the injection speed of the polyvinyl alcohol solution to 80ml / min;

...

Embodiment 2

[0041] Embodiment two: polymer is NOA65, liquid crystal is the preparation of the polymer dispersed liquid crystal of 5CB

[0042] 1. the prepolymer of NOA65: liquid crystal 5CB: the mass ratio of photoinitiator=60:39:1 is mixed and stirred evenly;

[0043] ②Add green pearlescent pigment to the polystyrene solution at a ratio of 0.7mg pearlescent pigment / ml polymer solution, and stir evenly;

[0044] ③Set the inner diameter of the oil phase inlet to 500 μm, and the inner diameter of the water phase inlet and outlet to 1000 μm. Inject 5% polyvinyl alcohol solution into the glass cylinder through the electromagnetic pump interface 2. After the glass cylinder (3) is filled with polyvinyl alcohol solution , control the injection speed of polyvinyl alcohol solution to 20ml / min;

[0045] ④Inject 5% polyvinyl alcohol solution into the T-shaped channel through the electromagnetic pump interface 2. When the air in the device is removed, control the injection speed of the polyvinyl alc...

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Abstract

The invention provides a method for preparing a microlens array with adjustable light transmittance. The microlens array is formed by arranging polymer scattering liquid crystal microspheres, wherein the polymer is polystyrene (PS), polycarbonate (PC), polymethylmethacrylate (PMMA), dimethyl silicone polymer (PDMS), NOA65 or NOA81; the liquid crystal is E7, E8, 5CB, 6CB, 7CB or a mixed liquid crystal of the liquid crystals and a light responding low molecule liquid crystal with azobenzol functional group, and the light responding low molecule liquid crystal can be BMAB, BHAB or BHMB. The preparation method comprises the following steps: mixing the polymer or the prepolymer of the polymer and liquid crystal to form a homogeneous solution, leading a polymer solution containing liquid crystal and a polyvinyl alcohol solution to a microflow control device so as to obtain the polymer solution drops containing liquid crystal, solidifying drops to obtain the polymer scattering liquid crystal microspheres, and forming the microlens array with an adjustable light transmittance by the microspheres.

Description

technical field [0001] The invention relates to a microlens array whose light transmittance can be adjusted by temperature and ultraviolet light, in particular to a microlens (array) with light transmittance arranged by a single polymer dispersed liquid crystal microsphere and a preparation method thereof. Background technique [0002] Microlens refers to tiny lenses, usually with a diameter of 10 μm to 1 mm. The array of these tiny lenses arranged in a certain shape on the substrate is called a microlens array. Microlens (array) optical components have the advantages of small size, light weight, and easy integration, and play an important role in various fields such as military affairs and scientific research. Microlenses (arrays) have significant applications in tiny optical systems, which can be used in optical information processing, optical computing, optical interconnection, optical data transmission, and can also be used in copiers, image scanners, fax machines, camer...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B81C3/00B81C5/00
Inventor 顾忠泽熊桂荣韩国志
Owner SOUTHEAST UNIV
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