CN203232232U

CN203232232U - Novel electric control zooming polymer dispersed liquid crystal lens

Info

Publication number: CN203232232U
Application number: CN 201220458613
Authority: CN
Inventors: 钟阳万; 郑继红; 王�琦; 吴军; 杨丰瑞; 王益林
Original assignee: Jiangxi University of Science and Technology
Current assignee: Jiangxi University of Science and Technology
Priority date: 2012-09-06
Filing date: 2012-09-06
Publication date: 2013-10-09
Anticipated expiration: 2022-09-06

Abstract

The utility model discloses a novel electronic control zooming polymer dispersed liquid crystal lens. The novel electronic control zooming polymer dispersed liquid crystal lens is composed of a liquid crystal cell made by two circular glass substrates, polymer dispersed liquid crystals in the liquid crystal cell and an electrodes address control circuit. The electrodes address control circuit is adopted to select circular electrodes with specific addresses on the glass substrates of the liquid crystal cell and voltage is applied. The selected electrodes are combined to be a Fresnel zone plate. A liquid crystal director in the dispersed liquid crystal is changed under the action of an applied electric field, and thus the liquid crystal cell is distributed like the Fresnel zone plate and a lens effect is shown after diffraction. The selected electrodes are changed by an electrode address control circuit according to an address requirement to combine a new Fresnel zone plate with a different focal length, and then the voltage is applied, so the goal of subdivision focal length quasi-continuous zooming is reached. The novel electronic control zooming polymer dispersed liquid crystal lens has advantages of no moving part, low power consumption, short response time, accurate zooming, easiness in miniaturization and the like, and has a wide application prospect in zooming optical imaging systems, video detecting camera systems, photo memories, DVD machine optical heads, optical communication and the like.

Description

A kind of new electronic control zoom Polymer Dispersed Liquid Crystal lens

Technical field

The utility model relates to a kind of new electronic control zoom Polymer Dispersed Liquid Crystal lens, particularly needs small integrated movement-less part and object distance to change and the fixing electric control varifocal lens of imaging surface.

Background technology

Diffraction optics not only can increase the degree of freedom of design in optical design, and can break through the limitation of all many-sides of conventional optical systems.Thereby, improving the system imaging quality, reduce volume and aspect such as reduce cost shows the conventional optical systems incomparable advantage, and be subjected to the attention of increasing optical designers.Variable focal length optical system has obtained to use widely at various optical instruments, and some new design philosophys emerge in an endless stream.The design's main thought is to utilize the electro-optical characteristic of Polymer Dispersed Liquid Crystal, change the purpose that the distribution of Fresnel wavestrip reaches lens segmentation focal length continuous vari-focus by external electrical field, thereby make lens arrangement compactness, light and handy, zoom is more convenient, accurate, and has avoided complicated lens mechanical motion in the traditional zoom system.Can not only be used widely at all kinds of digital vedio recording products, more can represent the value of its brilliance in other side such as numerous areas such as military affairs, medical treatment, space flight.

The utility model content

Goal of the invention: the utility model is that a kind of electric control zooming Polymer Dispersed Liquid Crystal lens that do not have moving-member, fast speed, low-power consumption, are beneficial to system's miniaturization will be provided.

Technical scheme: a kind of new electronic control zoom Polymer Dispersed Liquid Crystal lens, formed by liquid crystal cell, box interpolymer dispersed LCD and electrode address control circuit that two circular glass substrates are made, it is characterized in that being carved with the ITO concentric ring electrode on described two circular glass substrates, ITO concentric ring electrode width equates (submicron order), adjacent two donut gaps are the smaller the better, with can realize, adjacent two electrodes do not produce to electrically connect and are advisable.Encapsulation forms described liquid crystal cell to the heart by two circular glass substrates.Described electrode address control circuit applies the electrode of voltage according to the good electrode address selection of calculated in advance, is combined into the Fresnel zone plate of different focal.Described liquid crystal cell is filled by polymer dispersion liquid crystal material.

The concrete steps that realize electric control zooming Polymer Dispersed Liquid Crystal lens technologies scheme in the utility model are:

(1) preparation has the mask plate that waits the width donut, and the annulus width is submicron order, and the gap is the smaller the better between the adjacent annulus, with can realize, adjacent two electrodes do not produce electric connection and are advisable;

(2) two circular glass substrates that are coated with the ITO nesa coating of preparation are having the transparent conducting film glass substrate to have the electrode one side evenly to be coated with the last layer photoresist with the rotation method with plastic film;

(3) utilize the mask plate of making in the step (1), the glass substrate that scribbles photoresist is exposed under the ultraviolet photolithographic machine, through development, etching, obtain the ITO concentric ring electrode at glass substrate;

(4) concentric ring electrode on the two sheet glass substrates is aimed at, sealed with epoxy resin all around, and be reserved with an osculum, constitute a cavity, cavity thickness is controlled with interval body;

(5) perfusion Polymer Dispersed Liquid Crystal pre-polymer mixture in the cavity, and the osculum of reserving sealed places liquid crystal cell under the even laser light field of 514nm of Argon ion laser outgoing again and exposes, and makes the Polymer Dispersed Liquid Crystal liquid crystal cell;

(6) utilize the electrode address control circuit to select the ITO concentric ring electrode of particular address to constitute the fresnel's zone plate pattern, each Fresnel zone ring is made up of the continuous ITO concentric ring electrode of some, and to selected electrode application voltage, the liquid crystal director direction is regulated and control by electric field in the Polymer Dispersed Liquid Crystal, the liquid crystal director direction in powered electrode zone is parallel to direction of an electric field, therefore, be the amplitude type Fresnel zone plate under the liquid crystal cell alive regulation and control outside and distribute, present lens effect through diffraction;

(7) utilize control circuit to change the energising round loop electrode by the requirement of electrode address, can obtain the Fresnel zone pattern of different focal, reach the purpose of the quasi-continuous zoom of segmentation focal length.

Beneficial effect: the method that the utility model is based on automatically controlled Polymer Dispersed Liquid Crystal realizes the zoom of lens, have that solid-state, movement-less part, response time are short, focusing accurately, be easy to fine quality such as miniaturization.Can not only be used widely at all kinds of digital vedio recording products, more can represent its remarkable value at numerous areas such as military affairs, medical treatment, space flight.

Description of drawings

Fig. 1 is the circular glass substrate synoptic diagram that has the ITO concentric ring electrode

Fig. 2 is the liquid crystal cell front elevation

Fig. 3 is the liquid crystal cell diagrammatic cross-section

Fig. 4 is selected energising round loop electrode synoptic diagram

Fig. 5 is that automatically controlled Polymer Dispersed Liquid Crystal lens focus on synoptic diagram

Fig. 6 is focal length selected energising round loop electrode comparison diagram when being respectively 3mm and 4mm

Fig. 7 is automatically controlled Polymer Dispersed Liquid Crystal lens zoom synoptic diagram

Embodiment

The utility model is described in further detail below in conjunction with embodiment and accompanying drawing.

The utility model is a kind of new electronic control zoom Polymer Dispersed Liquid Crystal lens, is made up of liquid crystal cell, box interpolymer dispersed LCD and electrode address control circuit that two circular glass substrates are made.It is characterized in that being carved with the ITO concentric ring electrode on described two circular glass substrates, ITO concentric ring electrode width equates (submicron order), adjacent two donut gaps are more little more little, with can realize, adjacent two electrodes do not produce to electrically connect and are advisable, Fig. 1 is the circular glass substrate synoptic diagram that has the ITO concentric ring electrode, 101 is glass substrates among the figure, the 102nd, and concentric ring electrode, the 103rd, non-electrode district.Encapsulation forms described liquid crystal cell to the heart by two circular glass substrates, Fig. 2 is the liquid crystal cell front elevation, the 201st, epoxy resin envelope box glue, the 202nd, the Polymer Dispersed Liquid Crystal in the liquid crystal cell, the liquid crystal cell diagrammatic cross-section as shown in Figure 3, wherein 301 is concentric wide ring electrodes, the 302nd, epoxy resin envelope box glue, the 303rd, Polymer Dispersed Liquid Crystal, the 304th, glass substrate.Described electrode address control circuit applies the electrode of voltage according to the good electrode address selection of calculated in advance, be combined into the Fresnel zone plate of different focal, each Fresnel zone ring is made up of the continuous ITO concentric ring electrode of some, Fig. 4 is selected energising round loop electrode synoptic diagram, wherein 401 is selected energising electrode zones, the 402nd, and powered electrode zone not.To selected electrode application voltage, the liquid crystal director direction is regulated and control by electric field in the Polymer Dispersed Liquid Crystal, the liquid crystal director direction in powered electrode zone is parallel to direction of an electric field, therefore, being Fresnel zone plate under the liquid crystal cell alive regulation and control outside distributes, present lens effect through diffraction, Fig. 6 is focal length selected energising round loop electrode comparison diagram when being respectively 3mm and 4mm, can be combined into the Fresnel zone plate of different focal by the concentric ring electrode of selecting different addresses.Filled by polymer dispersion liquid crystal material in the described liquid crystal cell.

Implementation step of the present utility model is:

(3) utilize the mask plate of making in the step (1), the glass substrate that scribbles photoresist is exposed under the ultraviolet photolithographic machine, through development, etching, obtain the ITO concentric ring electrode at glass substrate, as shown in Figure 1,101 is glass substrates among the figure, the 102nd, concentric ring electrode, the 103rd, non-electrode district;

(4) concentric ring electrode on the two sheet glass substrates is aimed at, sealed with epoxy resin all around, be reserved with an osculum, constitute a cavity, cavity thickness is controlled with interval body;

(5) in cavity, pour into the Polymer Dispersed Liquid Crystal pre-polymer mixture, and the osculum of reserving sealed, again liquid crystal cell is placed under the even laser light field of 514nm of Argon ion laser outgoing and expose, make the Polymer Dispersed Liquid Crystal liquid crystal cell, Figure 2 shows that the front elevation of perfusion Polymer Dispersed Liquid Crystal liquid crystal cell afterwards, the 201st, epoxy resin envelope box glue, the 202nd, the Polymer Dispersed Liquid Crystal in the liquid crystal cell, the liquid crystal cell diagrammatic cross-section as shown in Figure 3, wherein 301 is concentric wide ring electrodes, the 302nd, epoxy resin envelope box glue, the 303rd, Polymer Dispersed Liquid Crystal, the 304th, glass substrate;

(6) utilize the electrode address control circuit to select the ITO concentric ring electrode of particular address to constitute the fresnel's zone plate pattern, each Fresnel zone ring is made up of the continuous ITO concentric ring electrode of some, and to selected electrode application voltage, the liquid crystal director direction is regulated and control by electric field in the Polymer Dispersed Liquid Crystal, the liquid crystal director direction in powered electrode zone is parallel to direction of an electric field, therefore, being the amplitude type Fresnel zone plate under the liquid crystal cell alive regulation and control outside distributes, present lens effect through diffraction, Fig. 4 is selected energising round loop electrode synoptic diagram, wherein 401 is selected energising electrode zones, the 402nd, powered electrode zone not, Fig. 5 is that automatically controlled Polymer Dispersed Liquid Crystal lens focus on synoptic diagram, the 501st, and liquid crystal cell, the 502nd, to the added voltage of round loop electrode;

(7) utilize control circuit to change the energising round loop electrode by the requirement of electrode address, can obtain the Fresnel zone pattern of different focal, reach the purpose of the quasi-continuous zoom of segmentation focal length, selected energising round loop electrode comparison diagram when Fig. 6 focal length is respectively 3mm and 4mm, Fig. 7 lens zoom synoptic diagram.

Claims

1. new electronic control zoom Polymer Dispersed Liquid Crystal lens, formed by liquid crystal cell, box interpolymer dispersed LCD and electrode address control circuit that two circular glass substrates are made, it is characterized in that being carved with the ITO concentric ring electrode on described two circular glass substrates, ITO concentric ring electrode width equates that adjacent two donut gaps make adjacent two electrodes not produce electric connection; Encapsulation forms described liquid crystal cell to the heart by two circular glass substrates; Described electrode address control circuit selects to apply the ITO concentric ring electrode of voltage, is combined into the Fresnel zone plate of different focal, and each Fresnel zone ring is made up of the continuous ITO concentric ring electrode of some.