CN101592841B - Method for manufacturing electrically controlled quick zooming optical imaging lens - Google Patents
Method for manufacturing electrically controlled quick zooming optical imaging lens Download PDFInfo
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- CN101592841B CN101592841B CN2009100540795A CN200910054079A CN101592841B CN 101592841 B CN101592841 B CN 101592841B CN 2009100540795 A CN2009100540795 A CN 2009100540795A CN 200910054079 A CN200910054079 A CN 200910054079A CN 101592841 B CN101592841 B CN 101592841B
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Abstract
The invention relates to a method for manufacturing an electrically controlled quick zooming optical imaging lens. Two circular glass liquid crystal boxes with the same diameter are prepared; voltage is applied on conducting films of two glass sheets; radiation electric field distribution from an annular electrode to a whole lower substrate is formed between the two glass sheets; optical axes of liquid crystal microdroplets are distributed along the electric force line direction; and effective refractive indexes in the liquid crystal boxes can be changed along the change of an electric field. The method can realize that the electric field quickly adjusts the focus of an optical system; and under 'opening' and 'closing' states of the electric field, the system has two focuses. Different focuses can be realized by adopting different electrode size designs, so the continuous zooming function in a certain range can be realized by stacking monolithic components with different focuses. Therefore, the method has wide application prospect in the fields such as electrically controlled zooming optical imaging, display and the like.
Description
Technical field
The present invention relates to a kind of automatically controlled optical element field, be specifically related to a kind of implementation method that realizes quick automatically controlled optical zoom lens with the electric field regulation and control.
Background technology
The Zooming method that in the application of optical device, adopts at present, great majority are mechanical zoom modes, reach the moving of position of adopting the motor driven optical lens and the variation that focal length takes place.But along with miniaturization of devices and rapid-action need, traditional mechanical motion mode has lagged behind the speed of development of device.Therefore, the lens of a variety of zoom modes appear again, the for example automatically controlled effect of selling off, and the wet effect of electricity etc. is utilized the optical component that focal length changes under the electric field action control.Be the optical device of liquid crystal material as automatically controlled typical case's representative of selling off effect wherein, for example the lens based on the electrically-controlled liquid crystal focusing occur.Also have much about PDLC, the ferroelectric liquid crystal of polymkeric substance waits the liquid crystal compound of doping type, adopts the face type, and structure is perhaps holographic, etching, the means of accomplished in many ways electric control zooming optical elements such as mask.Each method cuts both ways.For example in the automatically controlled lens research of polymer dispersion liquid crystal material, holography is arranged, face type, several different methods research such as polarization and electrode change and being implemented in the middle of the polymer dispersion liquid crystal material; Research effect, means, method; The result is not quite similar, but up to the present, owing to the reason of various aspects; The restriction of material character, the optimization of technology, the restriction of service condition; Like driving power, the reason of aspects such as pore size does not still have a kind of method really to be used for large tracts of land zoom electric control zooming imaging system.
The nanometer polymer dispersed LCD (PDLC) that receives much attention in recent years is a kind of new type electro material.When applying voltage; The director of liquid crystal droplet will be twisted by the regulation and control of electric field in the material; Cause the effective refractive index of nanometer polymer dispersed liquid crystal material also to ensue variation; Nanometer polymer dispersed liquid crystal material this automatically controlled sold off character and good visible light transmissivity, and (the liquid crystal droplet size reaches submicron order in the polymer substrate; Basically scatter visible light not) make it have good application prospects, also comprise to be made into wide-aperture zoom lens in this field of automatically controlled optical element.The prescription of PDLC and character are very complicated and various, say from developing stage, are divided into the polymer dispersion liquid crystal material and the nano level polymer dispersion liquid crystal material of micron-scale.Liquid crystal droplet size and phase separation structure produce great influence for device, but formula rate has a lot of problems to need to optimize with realization technology, solves.
Summary of the invention
The present invention be directed to the problem that existing Zooming method exists; A kind of electronic control liquid crystal photointerrupter array and method for making have been proposed; The on-mechanical formula, fast speed, low-power consumption, be beneficial to system's miniaturization, make simply, can realize the method for making of electric control varifocal lens and system through non-uniform electrodes.
Technical scheme of the present invention is: a kind of optical imaging lens method for making of electrically controlled quick zooming, and method for making comprises following concrete steps:
1) at first prepare two circular glass base plate for liquid crystal cell that diameter is identical, the aperture is 10mm-100mm as required, and wherein the whole surface of a slice is coated with tin indium oxide (ITO) nesa coating; Another sheet is annular tin indium oxide (ITO) nesa coating; The wide 5mm-10mm of garden endless belt, the center of circle of annular conducting film is concentric with base plate for liquid crystal cell, with two ITO films relatively and to the heart; The preparation liquid crystal cell is also controlled thickness at 5-20 μ m, stays inlet;
2) the pre-polymerization potpourri of prepared polymer dispersed LCD, with liquid crystal material, polymer monomer, proper amount of cross-linking agent, active agent and initiating agent, Hybrid Heating to 60 under the shading condition～70 ℃; Make it be in isotropic state; Thereby fully stirring and making its even mixing prepare PDLC prepolymer composite material with ultrasonic emulsification, calculate by quality ratio in the mixed solution, liquid crystal material accounts for 30%～40%; Polymer monomer accounts for 40%～60%; Crosslinking chemical accounts for 5%～16%, and active agent accounts for 6%～12%, and initiating agent accounts for 0.3%～2%; The ultrasonic emulsification time will be above 2 hours;
3) potpourri of Photosetting prepolymer and liquid crystal material being formed injects liquid crystal cell, the material inlet of reserving is sealed, and made public under the 514nm uniform light field that is placed on liquid crystal cell, and exposure power is 10-12mw/cm
2, the time shutter is 60 to 120 seconds, forms after solidifying through being separated to have the transparent film layer that the nano-scale liquid crystal droplet is embedded in the structure in the polymkeric substance of curing back;
4) on the conducting film of two blocks of glass sheet, add one when surpassing the drive threshold voltage of nanometer polymer dispersed liquid crystal material; Formed between two blocks of glass sheet by ring electrode to whole infrabasal plate radiant type Electric Field Distribution; Electric Field Distribution presents round symmetry status with the center of circle, and the optical axis direction of liquid crystal droplet distributes along the line of electric force direction, and the inner effective refractive index of liquid crystal cell appears broad in the middle; The edge is little, and refractive index is the form that reduces gradually of mind-set edge therefrom;
5) the width increase with endless belt ITO conducting film perhaps reduces, and the distribution of electric field lines changes thereupon, and liquid crystal droplet distributes along direction of an electric field, and effective refractive index distributes and changes thereupon, obtains the different focal length size.
Said 514nm uniform light field can adopt the argon laser of 514nm, and irradiation energy is every square centimeter of 10 milliwatt.
Said nanometer polymer dispersed liquid crystal material formula rate is as shown in the table:
| Monomer | Trimethylolpropane triacrylate | 35％-41wt％ |
| Surfactant | Sad | 7wt％-16％ |
| Crosslinking chemical | The N-vinyl pyrrolidone | 8％-16wt％ |
| Collaborative guiding agent | N-phenylglycine | 1％-1.3wt％ |
| The light guiding agent | Rose bengal medium | 0.7wt％-2％ |
| Liquid crystal material | E7 | ?34wt％-40％ |
Beneficial effect of the present invention is: the optical imaging lens method for making of electrically controlled quick zooming of the present invention has movement-less part, and the response time is short, and focusing accurately is easy to miniaturization, makes fine qualities such as simple.Electric control varifocal lens is at the camera mobile phone optical head, zoom information sign indicating number reading system, and the video detection monitored video camera system, optical storage, the first-class aspect of DVD player optics is with a wide range of applications.
Description of drawings
Fig. 1 is the circular conductive electrode glass substrate of the present invention schematic top plan view;
Fig. 2 is the circular conductive electrode glass substrate of the present invention diagrammatic cross-section;
Fig. 3 is an annular conductive electrode glass substrate schematic top plan view of the present invention;
Fig. 4 is an annular conductive electrode glass substrate diagrammatic cross-section of the present invention;
Fig. 5 is the empty liquid crystal cell diagrammatic cross-section of the present invention;
Fig. 6 is the empty liquid crystal cell schematic top plan view of the present invention;
Fig. 7 is liquid crystal cell internal electric field line diagrammatic cross-section behind the making alive of the present invention;
Fig. 8 is phase change in optical path length curve in position in the liquid crystal cell behind the making alive of the present invention;
Fig. 9 is liquid crystal cell internal electric field line schematic top plan view behind the making alive of the present invention;
Figure 10 is liquid crystal droplet direction of optic axis profile synoptic diagram in the liquid crystal cell behind the making alive of the present invention;
Figure 11 is liquid crystal (near the ring electrode liquid crystal layer) droplet direction of optic axis distribution schematic top plan view behind the making alive of the present invention;
Figure 12 is the lens effect of the asymmetric electrode zoom of annulus of the present invention polymkeric substance under electric field action;
Figure 13 is the double focusing focus of the asymmetric electrode liquid crystal lens of the present invention with solid focus lens combination.
Figure 14 realizes 2 for the asymmetric electrode liquid crystal of N sheet of the present invention cassette in series
NIndividual focus.
Embodiment
The optical imaging lens method for making step of electrically controlled quick zooming is:
1, preparation two sheet glass substrates (circle); The aperture is generally 10mm-100mm as required; Wherein the whole surface of a slice is coated with tin indium oxide (ITO) nesa coating; Like Fig. 1, shown in 2, another sheet plates annular tin indium oxide (ITO) nesa coating of the ring heart at the glass sheet center from the teeth outwards, and the width of ring belt is that 5mm-10mm is like Fig. 3, shown in 4.And the annular conductive electrode covered with shading film; Stack this two sheets relative direction then (be coated with nesa coating face in), and control cavity thickness well and in the scope of 5um to 20um, process liquid crystal cell (reserving the material inlet) like Fig. 5, shown in 6.Fig. 1, the 2nd, circular conductive electrode glass substrate is overlooked and diagrammatic cross-section, and Fig. 1 is a vertical view, the 101st, shading film; The 102nd, circular ITO nesa coating, Fig. 2 is a diagrammatic cross-section, the 103rd, circular ITO nesa coating; The 104th, glass substrate, the 105th, shading film; Fig. 3, the 4th, annular conductive electrode glass substrate is overlooked and diagrammatic cross-section, and wherein Fig. 3 is a vertical view, the 201st, glass substrate, the 202nd, shading film, Fig. 4 are diagrammatic cross-sections, the 203rd, annular ITO conductive electrode, the 204th, glass substrate, the 205th, shading film; Fig. 5 and Fig. 6 are respectively sky liquid crystal cell diagrammatic cross-section and vertical view, in Fig. 5, and the 301st, last lower glass substrate, the 302nd, liquid crystal cell epoxy sealing circle, 303 and 304 is respectively annular and circular ITO nesa coating, the 305th, shading film.2, be ready to polymer dispersion liquid crystal material, with liquid crystal material, polymer monomer, proper amount of cross-linking agent, active agent and initiating agent, Hybrid Heating to 60 under the shading condition ~ 70 ℃; Make it be in isotropic state; Thereby fully stirring and making its even mixing prepare PDLC prepolymer composite material with ultrasonic emulsification, calculate by quality ratio in the mixed solution, liquid crystal material accounts for 30% ~ 40%; Polymer monomer accounts for 40% ~ 60%; Crosslinking chemical accounts for 5% ~ 16%, and active agent accounts for 6% ~ 12%, and initiating agent accounts for 0.3% ~ 2%; The ultrasonic emulsification time will be above 2 hours.In the experiment, nanometer polymer dispersed liquid crystal material prescription commonly used is as shown in table 1:
Table 1 nanometer polymer dispersed liquid crystal material is selected for use and the formula rate table
| Monomer | TMPTA (trimethylolpropane triacrylate) (U.S. Aldrich company) trimethylolpropane triacrylate | 35％-41wt％ |
| Surfactant | OA (octanoic acid) (U.S. Aldrich company) is sad | 7wt％-16％ |
| Crosslinking chemical | NVP (N-vinylpyrrollidone) (U.S. Aldrich company) N-vinyl pyrrolidone | 8％-16wt％ |
| Collaborative guiding agent | NPG (N-phenylglycine) (U.S. Aldrich company) N-phenylglycine | 1％-1.3wt％ |
| The light guiding agent | RB (rose bengal) (U.S. Aldrich company) rose bengal medium | 0.7wt％-2％ |
| Liquid crystal material | E7 (German Merck Company products) | 34wt％-40％ |
3, the potpourri of materials such as Photosetting prepolymer and liquid crystal being formed injects this liquid crystal cell, the material inlet of reserving is sealed, and be placed on liquid crystal cell and make public under the 514nm uniform light field, and exposure intensity is 10mw/cm
2To 12mw/cm
2Between, the time shutter is about 120 seconds.Be placed in the ultraviolet source after exposure is accomplished and solidified ten minutes, form stable structure more.After the curing that is separated, form and have the transparent film layer that the nano-scale liquid crystal droplet is embedded in the structure in the polymkeric substance of curing back.The uniform light field of 514nm can adopt Ar ion laser bundle; Laser power is 100mw; Regulate light intensity with filter plate, accomplish filtering and collimation through aperture filtering and collimation lens again, light path stays through the center uniform parts of adjustable diaphragm with 00 mould Gaussian beam again; And edge energy low part in place to go promptly adopts apodization to obtain best laser explosure beam intensity and distribution.Liquid crystal cell sample after exposure solidify to be accomplished, appearance is limpid, and no scattering and absorption are dispersed in the middle of the polymer substrate with the nanometer droplet size just because of liquid crystal droplet.
4, on the ITO of two blocks of glass sheet conducting film, add high voltage; Because the drive threshold voltage of nanometer polymer dispersed liquid crystal material is very high; Even it is sad therefore to add the active agent that reduces driving voltage; Still the driving voltage level that keeps 25V/ μ m, the complete driving voltage that is applied specifically need be directly proportional according to thickness of liquid crystal box at the 200V-300V alternating voltage.Because the special round symmetric shape of two nesa coatings, between two glass sheet, form heterogeneous, about the symmetrical electric field of glass sheet center circle, like Fig. 7, shown in 8.Fig. 7 is a liquid crystal cell internal electric field line diagrammatic cross-section behind the making alive; 501 and 502 is glass substrates, the 503rd, and liquid crystal cell is crossed the centre section electric field line distribution behind the making alive, and Fig. 8 is because the electric force lines distribution of curve; The optics phasic difference curve synoptic diagram that produces; It is big that the asymmetric electrode structure of annular will produce middle refractive index, the distribution scenario that the peripheral refraction rate is little, and the optical path difference that is similar to convex lens distributes.Fig. 9 is a liquid crystal cell internal electric field line vertical view behind the making alive; Electric field level and direction all are round law of symmetry distribution in the liquid crystal cell; And because liquid crystal material electricity anisotropy; The direction of optic axis of ad-hoc location liquid crystal droplet receives the regulation and control of the size and Orientation of this place's electric field in the liquid crystal cell, and the rule that causes the liquid crystal droplet direction of optic axis also to form about glass substrate center circle symmetry distributes, like Figure 10, shown in 11; Figure 10 is the interior liquid crystal droplet direction of optic axis profile synoptic diagram of liquid crystal cell behind the making alive, and Figure 11 is a liquid crystal droplet direction of optic axis distribution vertical view behind the making alive.The liquid crystal droplet director alignment is the same with Electric Field Distribution to be circle and to be symmetrically distributed, because the liquid-crystal refractive-index anisotropy, the refractive index of rete also is circle and is symmetrically distributed, radially change by specific curves, rete become one certain focus arranged lens.Figure 12 is the lens function of asymmetric circular electrode structure liquid crystal cell under electric field action, is similar to the convex lens function.Because the degree of rotation difference of liquid crystal optic axis causes gradually changing of refractive index, thereby realize the zoom function of lens.The 1st, glass substrate, the 2nd, epoxy sealing circle, the 3rd, annular tin indium oxide (ITO) transparency electrode, the 4th, circular ito transparent electrode, the 5th, liquid crystal cell Electric Field Distribution, the 6th, shading film.
5, the combination of lenses that this electric control varifocal lens and is had a fixed focal length is realized the electric control varifocal lens of different focal modification scope, and its aberration can the method through aberration balancing be optimized when system design, improves picture element.Figure 13 is symmetrical electric field zoom lens of non-homogeneous circle and solid focus lens combination focusing synoptic diagram, and this figure explanation combines with the lens of fixed focal length, can realize two focal lengths.
6, the dissymmetrical structure liquid crystal lens is the change that causes the liquid crystal effective refractive index through the variation of line of electric force direction; If the endless belt width of the ITO electropane of endless belt is made to a certain degree modification and variation; For example be increased to 10mm from 5mm; Then electric force lines distribution will produce certain corresponding variation, and then refractive index distribution curve and intensity of variation distribute and also produce certain change, focus on the focal position thereby have influence on.The liquid crystal lens overlapped in series that will have different focal positions can obtain more focus.What Figure 14 described is that the stack of N sheet electrically-controlled liquid crystal lens is obtained 2
NIndividual focal position.
The present invention adopts the nanometer polymer dispersed liquid crystal material in quick automatically controlled reaction time; Design the liquid crystal cell of the transparent ITO conducting film of asymmetric ring-dish configuration electrode; At first prepare two circular glass base plate for liquid crystal cell; Wherein the whole surface of a slice is coated with tin indium oxide (ITO) nesa coating; Another sheet is annular tin indium oxide (ITO) nesa coating, and the center of circle of this annular conducting film is concentric with base plate for liquid crystal cell, with two ITO films in opposite directions and prepare liquid crystal cell and control thickness at 5 μ m-20 μ m.Again nanometer polymer dispersed LCD prepolymer material is injected in the liquid crystal cell, with expansion bundle laser irradiation liquid crystal cell and the curing of 514nm.After the curing that is separated, form the structure in the polymer substrate after the nanoscale liquid crystal droplet is dispersed in curing, the incident visible light is not absorbed and scattering, be equivalent to a parallel flat, its refractive index is the mean refractive index of polymkeric substance with liquid crystal compound.When on the conducting film of two blocks of glass sheet, adding one when surpassing the voltage of threshold value, formed by ring electrode to whole infrabasal plate radiant type Electric Field Distribution, Electric Field Distribution presents round symmetry status with the center of circle.The optical axis direction of liquid crystal droplet distributes along the line of electric force direction.This presents (the part liquid crystal optic axis is perpendicular to the incident light direction, and extraordinary refractive index is about about 1.7, and is different according to the liquid crystal kind of being selected for use) broad in the middle with regard to having determined the inner effective refractive index of liquid crystal cell, and the edge is little (just to equal the ordinary refractive index n of liquid crystal
o=n
p, about about 1.5, different according to the liquid crystal kind selected for use), refractive index is the form that reduces gradually of mind-set edge therefrom, the variation that has produced optical path difference therefrom, similar plano-convex lens function has the focusing focus.When removing electric field, liquid crystal droplet presents free random orientation, and liquid crystal cell recovers the parallel flat function.When the width that changes the top glass substrate conductive ring, then the electric force lines distribution state changes during making alive, causes the variation that effective refractive index distributes, and produces other focal length.Common pure liquid crystal device, the electric-controlled switch response time is more than 10ms, and the response time of nanometer polymer dispersed liquid crystal material can reach the microsecond magnitude, can realize 60 microseconds the soonest.It is simple that this method has realization, and the response time is short, is easy to good characteristics such as integrated.In addition, this method can realize the focal length of electric field rapid adjustment optical system, electric field " open " and " pass " two states under, system has two focal lengths.Adopt different electrode size designs can realize different focal length, therefore the monolithic component stack with different focal can realize the continuous vari-focus function in the certain limit.
Claims (3)
1. the optical imaging lens method for making of an electrically controlled quick zooming, method for making comprises following concrete steps:
1) at first prepare two circular glass base plate for liquid crystal cell that diameter is identical, the aperture is 10mm-100mm as required, and wherein the whole surface of a slice is coated with the indium tin oxide transparent conducting film; Another sheet is an annular indium tin oxide transparent conducting film; Annulus bandwidth 5mm-10mm, the center of circle of annular conducting film is concentric with base plate for liquid crystal cell, with two indium tin oxide transparent conducting films relatively and to the heart; The preparation liquid crystal cell is also controlled thickness at 5-20 μ m, stays inlet;
2) the pre-polymerization potpourri of prepared polymer dispersed LCD, with liquid crystal material, polymer monomer, proper amount of cross-linking agent, surfactant, light guiding agent and collaborative guiding agent; Hybrid Heating makes it be in isotropic state to 60-70 ℃ under the shading condition, thereby is fully stirring and making its even mixing prepare the PDLC composite material with ultrasonic emulsification; Calculate by quality ratio in the mixed solution, liquid crystal material accounts for 34%--40%, and polymer monomer accounts for 35%-41%; Crosslinking chemical accounts for 8%-16%; Surfactant comprise 7%-16%, collaborative guiding agent accounts for 1%-3%, light guiding agent 0.7%-2%; The ultrasonic emulsification time was above 2 hours.
3) potpourri of Photosetting prepolymer and liquid crystal material being formed injects liquid crystal cell, the material inlet of reserving is sealed, and made public under the 514nm uniform light field that is placed on liquid crystal cell, and exposure power is 10-12mw/cm
2, the time shutter is 60 to 120 seconds, forms after solidifying through being separated to have the transparent film layer that the nano-scale liquid crystal droplet is embedded in the structure in the polymkeric substance of curing back;
4) on the conducting film of two blocks of glass sheet, add one when surpassing the drive threshold voltage of nanometer polymer dispersed liquid crystal material; Formed between two blocks of glass sheet by ring electrode to whole infrabasal plate radiant type Electric Field Distribution; Electric Field Distribution presents round symmetry status with the center of circle, and the optical axis direction of liquid crystal droplet distributes along the line of electric force direction, and the inner effective refractive index of liquid crystal cell appears broad in the middle; The edge is little, and refractive index is the form that reduces gradually of mind-set edge therefrom;
5) the width increase with endless belt ITO conducting film perhaps reduces, and the distribution of electric field lines changes thereupon, and liquid crystal droplet distributes along direction of an electric field; Effective refractive index distributes and changes thereupon; Obtain the different focal length size, electric field " open " and " pass " two states under, system has two focal lengths; Adopt different electrode size designs to realize different focal length, with the continuous vari-focus function in the monolithic component stack realization certain limit of different focal.
2. the optical imaging lens method for making of electrically controlled quick zooming according to claim 1 is characterized in that, said 514nm uniform light field can adopt the argon laser of 514nm, and irradiation energy is every square centimeter of 10 milliwatt.
3. the optical imaging lens method for making of electrically controlled quick zooming according to claim 1 is characterized in that, the pre-polymerization potpourri of said PDLC is the nanometer polymer dispersed liquid crystal material; Material therefor is respectively in the potpourri: monomer is a trimethylolpropane triacrylate; Surfactant is sad, and crosslinking chemical is the N-vinyl pyrrolidone, and collaborative guiding agent is a N-phenylglycine; The light guiding agent is a rose bengal medium, and liquid crystal material is E7.
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| CN102702548B (en) * | 2012-05-24 | 2014-06-25 | 宁波大学 | Preparation method of polymer dispersed liquid crystal film with hole and performance testing device |
| CN103543552B (en) * | 2012-07-10 | 2016-07-06 | 群康科技(深圳)有限公司 | Display panels, its driving method and comprise its liquid crystal display |
| TWI495943B (en) * | 2012-07-10 | 2015-08-11 | Innocom Tech Shenzhen Co Ltd | Liquid crystal panel, driving method thereof, and liquid crystal display containing the same |
| CN102799041A (en) * | 2012-09-06 | 2012-11-28 | 江西理工大学 | Novel method for manufacturing electrically-controlled zooming oriented polymer dispersed liquid crystal lens |
| CN102799040A (en) * | 2012-09-06 | 2012-11-28 | 江西理工大学 | Method for preparing novel electronic control zooming polymer dispersed liquid crystal lens |
| US20180173078A1 (en) * | 2015-06-18 | 2018-06-21 | Lensvector Inc. | Variable focus camera lens |
| CN108267896A (en) * | 2016-12-30 | 2018-07-10 | 深圳超多维光电子有限公司 | polarization imaging device and method |
| CN107329346B (en) * | 2017-08-31 | 2020-07-17 | 宁波视睿迪光电有限公司 | Electric control birefringence lens and image acquisition device |
| CN111487802B (en) * | 2019-01-28 | 2022-10-04 | 北京纳米能源与系统研究所 | Self-driven optical switch and wireless sensing system |
| CN110596968A (en) * | 2019-08-29 | 2019-12-20 | 广东工业大学 | Variable-focus arc-shaped cylindrical cavity liquid crystal lens |
| CN110703513A (en) * | 2019-08-29 | 2020-01-17 | 广东工业大学 | Variable-focus liquid crystal lens with spherical cavity structure |
| CN111381395B (en) * | 2020-01-21 | 2023-11-28 | 奥提赞光晶(山东)显示科技有限公司 | Electric control continuous zoom lens, preparation method and exposure system |
| CN115097555A (en) * | 2022-06-30 | 2022-09-23 | 杭州逗酷软件科技有限公司 | Zoom lens, camera and electronic equipment |
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