CN101672990A - Zoom liquid crystal lens - Google Patents

Zoom liquid crystal lens Download PDF

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Publication number
CN101672990A
CN101672990A CN 200810212351 CN200810212351A CN101672990A CN 101672990 A CN101672990 A CN 101672990A CN 200810212351 CN200810212351 CN 200810212351 CN 200810212351 A CN200810212351 A CN 200810212351A CN 101672990 A CN101672990 A CN 101672990A
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liquid crystal
electrode
glass substrate
surface
layer
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CN 200810212351
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Chinese (zh)
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CN101672990B (en )
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林肇政
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一品光学工业股份有限公司
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Abstract

The invention provides a zoom liquid crystal lens, which comprises a single-layer or multi-layer liquid crystal lens unit. The liquid crystal lens unit utilizes at least two pieces of glass substratesin a scheduled thickness; an aluminium film, a silver film or other translucent metal films are arranged on one side or double sides of each glass substrate respectively in an etching mode to form asurface alignment electrode which can be controlled independently; and then the glass substrates are arranged in parallel at intervals, so that a layer of accommodating space in a predetermined thickness is arranged between two adjacent glass substrates to seal liquid crystals so as to form a layer of liquid crystal lens unit. The arrangement direction and the optical properties such as the refractive index and the like of liquid crystal molecules in each liquid crystal lens unit are independently controlled by voltage so as to improve the imaging quality, accelerate zoom switching, improve the convenience of assembling the zoom liquid crystal lens and reduce the overall lens thickness and the manufacturing cost.

Description

一种变焦液晶透镜 A zoom lens of the liquid crystal

技术领域 FIELD

本发明是涉及一种液晶透镜,尤其涉及一种变焦液晶透镜。 The present invention relates to a liquid crystal lens, particularly to a liquid zoom lens. 背景技术 Background technique

相机、手机相机或立体影像处理等装置,常利用变焦镜头将影像放大或缩 Camera, mobile phone camera or a stereoscopic image processing apparatus, often used to zoom in or zoom the image

小以成像。 Small to imaging. 传统变焦镜头设有多个镜群(lens group),通过镜群间沿光轴方向移动,以改变彼此间的间距,而使整体焦距改变,但不影响成像距离。 A plurality of conventional zoom lens group (lens group), by moving the optical axis direction between the lens group to vary the distance between them, the whole focal length change, but does not affect imaging distance. 然此种镜头需要较长的镜群移动距离,且其距离为非线性关系,因此在结构设计、控制精确度上甚为困难,成本也居高而难以降低。 However, such a lens must be moved a long distance lens group, and the distance is nonlinear, and therefore in the structural design, the accuracy of the control is very difficult and expensive and is difficult to reduce a high ranking. 另有使用液态镜头(liquid lens)或液晶镜头(liquid crystal lens,简称LClens),以改善镜群移动的距离,以缩小相机的尺寸。 Another use of liquid lens (liquid lens) lens or a liquid crystal (liquid crystal lens, referred LClens), in order to improve the moving distance of the lens group, in order to reduce the size of the camera. 液态镜头的原理是由一个可调变的液体填充透镜和一个固体透镜所组成,可以利用改变液体填充透镜的形状(双凸或凹凸)或是改变不同折射率的填充介质来i故调整镜头焦距以达到变焦目的,如"Liquid-Crystal Lens-Cells with Variable Focal Length ,,、作者为Susnmu Sato 、 Japan J. of Applied physics, 1979 年3月12日;美国专利US2007/0217023。另,可变焦液晶镜头的原理,是利用非均匀电场施加在非均匀液晶层,或非均匀电场施加在均匀液晶层,或均匀电场施加在非均匀液晶层,以产生一个渐变的折射率,而调整镜头焦距以达到变禁、目的,:ft口作者为Yun隱Hsing Fan etc.,名4尔为"Liquid crystal microlens arrays with switchable positive and negative focal lengths", Journal of Display Technology: 2005年9月。 Principle of a liquid lens is adjustable by a variation of the liquid filled lens and a solid lens composed, may be utilized to change the shape of the liquid filled lens (a biconvex or convex) or changing the filling medium so that different refractive indices to adjust the lens focus i zoom to achieve the purpose, such as "liquid-crystal Lens-Cells with Variable Focal Length ,,, author Susnmu Sato, Japan J. of Applied physics, 1979 Nian 3 Yue 12 days; US Patent US2007 / 0217023 another, can zoom LCD. the principle of the lens, is applied using a nonuniform electric field is applied to the refractive index of the liquid crystal layer is applied in a uniform, non-uniform or uniform electric field the liquid crystal layer to produce a gradient in the liquid crystal layer is non-uniform, non-uniform electric field, and adjusts the lens focus to achieve change the ban on purpose,: ft of mouth is hidden Yun Hsing Fan etc., were 4 Seoul as "Liquid crystal microlens arrays with switchable positive and negative focal lengths", Journal of Display Technology: September 2005.

由于液晶具有良好的光电特性及很低的操作电压, 一向就被广泛利用来制作可电控光调制元件。 Since the liquid crystal having excellent photoelectric characteristics and low operating voltage, it has always been widely used to produce an electrically controllable light modulation element. 现有的液晶透镜技术,如图1A所示,主要是将液晶分子103封存在两片电极102之间,利用两电极之间电压的分布变化来改变液晶分子的排向,进而改变通过此液晶透镜光圏的光程特性以达成变焦效果。 Conventional liquid crystal lens technology, shown in Figure 1A, the liquid crystal molecules 103 is mainly sealed between the two electrodes 102, using the distribution change of the voltage between the electrodes to change the discharge of liquid crystal molecules, thereby changing the liquid crystal by this rings of light the optical path of the lens characteristics to achieve a zoom effect. 现有液晶透镜电极多采用在玻璃平板102表面镀上一ITO透明导电薄膜以形成ITO电才及IOI,而ITO为掺杂锡的铟氧化物(Indinm Tin Oxide ,或Tin-doped IndijimOxide,简称ITO ),由于其具有极佳的导电特性(电阻系数可至2 x 10-4 Q. cm 下,约为最佳导体银金属的100倍)及高可见光的透过性及高红外光的反射性, 已被发展应用于液晶显示器及液晶透镜使用;其结构上,在液晶层两侧,可为两片ITO膜或一片ITO膜配合一片金属镀膜所构成;如图1A,在ITO101上加上非均匀电场,所述电场施加在均匀液晶材料103上,将会产生接触的厚度的变化,改变液晶透镜的折射率,使液晶透镜由非聚焦转变成聚焦,或改变其焦距;如美国专利US6,882,390、 US7,388,822、 US2007/0183293台湾专利TW M327490、日本专利JP08-258624、 WIPO专利WO/1993/009524等。 Use more conventional liquid crystal lens electrode coated with an ITO transparent conductive film on the surface of the glass plate 102 to form ITO electrodes before and IOI, ITO and tin-doped indium oxide (Indinm Tin Oxide, or Tin-doped IndijimOxide, referred to as ITO ), since it has excellent electrical properties (resistivity to be at 2 x 10-4 Q. cm, about 100 times the best conductor of silver metal) and a high reflectivity to visible light transmission and high infrared light , it has been developed and applied to the liquid crystal display device using the liquid crystal lens; its structure, on both sides of the liquid crystal layer, an ITO film may be a two or a ITO film formed with a metal film; FIG. 1A, in the non-adding ITO101 uniform electric field, the electric field is applied to a homogeneous liquid crystal material 103, will produce changes in the thickness of the contact lens to change the refractive index of the liquid crystal, the liquid crystal lens is focused into a non-focused, or change its focal length; U.S. Patent No. US6, 882,390, US7,388,822, US2007 / 0183293 Taiwan Patent TW M327490, Japanese Patent JP08-258624, WIPO Patent WO / 1993/009524 and the like. 但由于ITO 透明导电薄膜需使用的电压较高,与液晶组成液晶镜头(即液晶透镜模块)时, 其反应时间较长,切换速度緩慢,不适合用于相机或手机镜头使用。 But since the ITO transparent conductive thin film high voltage required for use, the liquid crystal composition of the liquid crystal lens (i.e., the liquid crystal lens module), and the reaction time is long, slow switching speed, not suitable for a mobile phone or camera lenses.

对于替代ITO材料,现有技术尚有在玻璃基板上镀上铝膜并蚀刻出特定光圏以作为电极,如图IB,如美国专利US2007/0183293、 US2007/0182915更进一步公开使用低电阻的铝、金、银或铬与高电阻的氧化锌、氧化铅或氧化铟搭配;美国US2007/0024801专利则公开传热介质使用金膜(goldfilm);通过施以电压以改变光圏中液晶的排向方式而达到变焦的目的;或以快速热传导。 For alternative ITO materials, the prior art there are coated on the glass substrate and etching the aluminum film as an electrode specific rings of light, the IB in FIG., As described in US Patent No. US2007 / 0183293, US2007 / 0182915 further discloses the use of a low-resistance aluminum , zinc oxide, gold, silver or chromium with high electrical resistance, with lead oxide or indium oxide; US US2007 / 0024801 patent discloses the use of a heat transfer medium gold film (goldfilm); to change the voltage applied by the row of the light rings of the liquid crystal way to achieve the purpose of zooming; or a rapid thermal conduction. 由于在液晶分子上下层之间,由于使用不同配置的电极,造成电场不同,虽可形成渐变的折射率,但也形成边缘衰减现象而造成成像品质不佳,或具有高操作电压、聚焦效率不高、聚焦效率与偏振为相依性、及可调控焦距范围不够大等缺点,致在使用上仍有许多限制;而为解决上述问题,现有技术常需要搭配其他传统透镜以组成一复合式透镜,以补偿变焦速度与成像品质,但是也相对增加整体的厚度与成本,并且仍然无法有效解决变焦切换速度的问题。 Since the liquid crystal molecules between the upper and lower, due to the use of different electrode configurations, different electric fields result, although a graded refractive index can be formed, but the edge is formed fade phenomenon caused by poor image quality, or with a high operating voltage, the focusing efficiency high focusing efficiency of the polarization dependence, and not adjustable focal length area and other shortcomings, the use of the actuator are still many limitations; and to solve the above problems with the prior art often require additional conventional lens to form a composite lens to compensate for the zoom speed and image quality, but also the relative increase in the overall thickness and cost, and still can not effectively solve the problem of the zoom switching speed.

发明内容 SUMMARY

本发明的主要目的在于提供一种变焦液晶透镜,其利用至少两片预定厚度的玻璃基板,并通过蚀刻方式以在玻璃基板上构成单面金属蚀刻的表面配向电极或双面金属蚀刻的表面配向电极;再将所述等玻璃基板以预定间距封存液晶分子,以构成液晶透镜单元;进一步利用液晶透镜单元以组成单层或多层变焦液晶透镜,而可以电压来独立调控各液晶透镜单元中液晶分子的排向,产生预定的光学特性,供给相机、手机相机或立体影像处理等装置镜头的变焦目的使用。 The main object of the present invention is to provide a variable focus liquid crystal lens a predetermined thickness using at least two glass substrates, and alignment with the surface of the electrodes or both etched by etching the metal constituting the surface side of the metal etched on the glass substrate electrode; then the other glass substrate, liquid crystal molecules sealed at predetermined intervals to constitute the liquid crystal lens unit; further lens unit using a liquid crystal composition in single or multiple layers of the zoom lens of the liquid crystal, and voltage may be regulated independently of each liquid crystal cell of the liquid crystal lens exhaust molecules to produce a zoom lens apparatus object of predetermined optical characteristics, supplied camera, camera phone or the like using the stereoscopic video processing.

为达成上述目的,本发明的单层变焦液晶透镜包括单层液晶透镜单元,所述液晶透镜单元利用两片预定厚度的玻璃基板排列构成,利用铝膜、银膜或其他可透光的金属膜,通过蚀刻方式以在玻璃基板上构成单面金属蚀刻的表面配 To achieve the above object, a liquid crystal monolayer zoom lens of the present invention comprises a single layer liquid crystal lens unit, the lens unit using the liquid crystal thickness of two glass substrates arranged in a predetermined configuration, the use of aluminum, silver or other metal film may be a film transparent , by etching the surface configuration of the single-sided metal etching on a glass substrate with

向电极或双面金属蚀刻的表面配向电极,以取代现有由ITO (掺杂锡的锢氧化物,Tin-doped Indipm Oxide,简称ITO )透明导电薄膜形成的电极结构;其中, 所述金属蚀刻的表面配向电极在玻璃基板的两侧(双面)上可为对称,并形成相同配向图样的表面配向电极;或所述表面配向电极可为不对称并形成不同配向图样的表面配向电极;再使所述两片玻璃基板以预定间距平行间隔排列,构成容室,并在容室中装填液晶材料,构成单层液晶透镜单元;当施以特定电压于表面配向电极,可使液晶产生特定的折射率与光学特性;对于施以不同电压可产生不同的折射率与光学特性,而产生变焦液晶透镜的变焦效果。 Etching the metal surface or both surfaces of the electrodes with the electrodes, to replace the existing made of ITO (tin-doped indium oxide, Tin-doped Indipm Oxide, referred to as ITO) electrode structure is formed of a transparent conductive thin film; wherein the metal etching surfaces with the electrodes on both sides (double-sided) glass substrate may be symmetrical, and formed in the same with the alignment to the surface of pattern electrodes; or the surface ligands to the electrodes may be electrodes of different ligands alignment to the surface of the pattern is asymmetric and forms; and then the two glass substrates are arranged in parallel spaced at predetermined intervals, chamber configuration, and a liquid crystal material filled in the chamber, the single crystal constituting the lens unit; when the specific voltage applied to the electrode surface of the alignment, the liquid crystal can produce a particular the refractive index of the optical properties; for different applied voltages may produce different refractive indices and optical characteristics of the liquid crystal to produce a zoom lens, zoom effect.

本发明的另一目的在于提供一种变焦液晶透镜,包括双层或三层以上液晶透镜单元,所述液晶透镜单元利用至少两片预定厚度的玻璃基板排列构成,利用铝膜、银膜或其他可透光的金属膜,通过蚀刻方式以在玻璃基板上构成单面金属蚀刻的表面配向电极或双面金属蚀刻的表面配向电极;其中,所述金属蚀刻的表面配向电极在玻璃基板两侧(双面)上可为对称并形成相同配向图样的表面配向电极;或所述表面配向电极可为不对称并形成不同配向图样的表面配向电极;再使两片玻璃基板以预定间距平行间隔排列,构成容室,并在容室中装填液晶材料,构成双层或多层的液晶透镜单元;当施以特定电压于各层的表面配向电极,可使液晶产生特定的折射率与光学特性;对于施以不同电压则可产生不同的折射率与光学特性,而产生变焦液晶透镜的变焦效果。 Another object of the present invention is to provide a variable focus liquid crystal lens, comprising three or more double or liquid crystal lens unit, the lens unit of the liquid crystal using at least two glass substrates arranged in a predetermined thickness constituted by an aluminum film, silver film or other a metal film may be transparent, or both sides of the electrodes with etching the metal constituting the surface side of the metal substrate is etched on the glass surface by etching with the electrodes; wherein the metal to the etched surface with a glass electrode at sides of the substrate ( on both sides) may be symmetrical and form the same with the alignment to the surface of pattern electrodes; or a surface feature may be asymmetrical to the electrode and form different ligands alignment electrodes of the surface pattern; and then the both glass substrates at a predetermined pitch in parallel spaced, chamber configuration, and a liquid crystal material filled in the chamber, two or more layers constituting the liquid crystal lens unit; when the specific voltage applied to the electrode with the surface layers, can produce a specific refractive index of the liquid crystal optical properties; for different voltages can be applied to produce different refractive indices and the optical characteristics of the liquid crystal to produce a zoom lens, zoom effect.

本发明的又一目的在于提供一种变焦液晶透镜,对于单层或多层液晶透镜单元的玻璃基板表面的金属蚀刻所形成的表面配向电极,可设计为单孔式或同心圆式配向图样,以提供光圏、折射率、焦距等光学特性的多种变化。 A further object of the present invention is to provide a variable focus liquid crystal lens, the surface of the metal substrate surface etching of a single or multilayer liquid crystal lens unit is formed with the glass electrodes, be designed as a single-hole type or concentric alignment pattern, to provide a plurality of rings of light change in optical properties, refractive index, the focal length and the like.

本发明的再一目的在于提供一种变焦液晶透镜,以改善现有的ITO构成的液晶透镜,由于现有的ITO构成的液晶透镜的结构为在液晶层两侧,可为两片ITO膜或一片ITO膜配合一片为金属镀膜所构成,因此在液晶接触的两片玻璃基板表面配向电极表面,是不同材质的状况,当施以电压时,材质不同的表面配向电极对于液晶造成的拖曳力(anchoring force)会有些许差距,因而影响到液晶透镜光圏最后的偏光性质;为改善此现象,本发明的特征之一为在液晶层两侧采用相同材质的表面配向电极,可容易的调整到良好对称,减少液晶透镜光圏偏心问题。 A further object of the present invention is to provide a variable focus liquid crystal lens, in order to improve the conventional liquid crystal lens of ITO, since the structure of a conventional liquid crystal lens of ITO is formed on both sides of the liquid crystal layer, an ITO film may be a two or an ITO film with a metal film formed, and therefore the glass substrate surface of the two liquid crystal in contact with the electrode surface, is the condition of different materials, when the applied voltage is different from the material surface with a drag of the liquid crystal due to the electrodes ( anchoring force) there was a little gap, thereby affecting the final properties of the liquid crystal lens polarized rings of light; to improve this phenomenon, one of the features of the present invention is to employ the same material on both sides of the surface of the liquid crystal alignment layer of the electrode can be easily adjusted to good symmetry, to reduce the liquid crystal lens eccentricity rings of light.

6与现有技术相比,本发明的变焦液晶透镜可依据光学设计需要,搭配不同层数的单层或多层液晶透镜单元与不同表面配向电极,通过单独控制液晶透镜单元的电压,产生折射率、光圏大小等光学特性变化,以改善变焦切换速及优化整体液晶透镜模块的光学效果及变焦品质,可减少整体镜头厚度及制作成本。 6 compared to the prior art, the zoom lens of the present invention may be a liquid crystal based optical design requirements, with different layers of a single or multilayer liquid crystal lens unit and to the electrode with different surfaces, by individually controlling the voltage of the liquid crystal lens unit, refracted the rate of change in optical properties, size of rings of light, in order to improve the switching speed of the zoom lens module and optimization of the entire liquid crystal optical zoom effect and quality, reduce production costs and the overall thickness of the lens.

附图说明 BRIEF DESCRIPTION

图1A、 1B是现有变焦液晶透镜的侧视示意图。 1A, 1B, the liquid crystal is a side view of a conventional zoom lens. 图2是本发明单层液晶透镜单元的外观示意图。 FIG 2 is an external single-layer liquid crystal lens element of the present invention. FIG. 图3是本发明单层液晶透镜单元的外观分解示意图。 FIG 3 is an external single crystal of the present invention is an exploded view of the lens unit.

图4A是表面配向电极的电场作用示意图(上、下层表面配向电极不对称)。 4A is a schematic diagram of an electric field with the surface of the working electrode (on the lower surface of the electrodes with asymmetric). 图4B是液晶分子在图4A电场作用时的情形示意图。 FIG. 4B is a schematic diagram when the liquid crystal molecules in the case of FIG. 4A electric field.

图5A是表面配向电极的电场作用示意图(上、下层表面配向电极对称)。 5A is a schematic view of an electric field with the surface of the working electrode (on the lower surface of the electrodes with symmetry). 图5B是液晶分子在图5A电场作用时的情形示意图。 FIG 5B is a schematic diagram of the liquid crystal molecules in the case when an electric field 5A in FIG. 图6是折射率与入射角度的关系示意图。 FIG 6 is a diagram showing the relationship between the refractive index of the incident angle.

图7A、 7B、 7C是液晶透镜单元(第一实施例)在不同电场中产生不同折射率时的光路示意图。 FIG 7A, 7B, 7C is a schematic view of an optical path when the liquid crystal lens unit (a first embodiment) have different refractive indices in different electric field.

图8是双面电极玻璃基板的制造示意图。 8 is a schematic for producing a double-sided electrode glass substrate.

图9是本发明的双层液晶透镜单元(第二实施例)的结构侧面及光路示意图。 9 is a structural liquid crystal side surface of a double lens unit of the present invention (second embodiment) and an optical path of FIG.

图IO是本发明的三层液晶透镜单元(第三实施例)的结构侧面及光路示意图。 FIG IO three sides of the liquid crystal lens is a structural unit of the present invention (third embodiment) of the light path and FIG.

附图标记说明:变焦液晶透镜-1、 2、 3;玻璃基板-10;单面电极玻璃基板-10a;双面电极玻璃基板-10b;光圏-ll;表面配向电极-20、 20a、 20b;液晶层-30;间隔片-40;金属膜-50;光阻层-51;光罩-52。 REFERENCE SIGNS LIST: liquid zoom lens -1, 2, 3; -10 glass substrate; -10A-surface electrode glass substrate; a double-sided electrode substrate is a glass - 10B; light rings of the -ll; surface ligands to the electrodes -20, 20a, 20b ; -30 crystal layer; spacer -40; -50 metal film; -51 photoresist layer; -52 reticle.

具体实施方式 detailed description

以下结合附图,对本发明上述的和另外的技术特征和优点作更详细的说明。 Conjunction with the drawings, the above and further features and advantages of the present invention will be described in more detail. 本发明以下所揭示的实施例,是针对本发明变焦液晶透镜的主要构成元件而作说明,因此就一般液晶透镜模块结构而言,本领域普通技术人员了解,本发明所公开的变焦液晶透镜的构成元件并不限制于以下所公开的实施例结构, 也就是所述变焦液晶透镜各构成元件是可以进行许多改变、修改、甚至等效变 The following embodiments of the present invention is disclosed embodiment, the present invention is directed to a zoom lens is composed mainly of the liquid crystal elements as described, and therefore in terms of the general module structure of the liquid crystal lens, those of ordinary skill in the art understand, the liquid crystal of the zoom lens of the present invention disclosed constituting the element structure is not limited to the embodiments disclosed below, that is, of the zoom lens of each liquid crystal element is composed of many changes, modifications, equivalent variations and even

7更的,例如:所述变焦液晶透镜的外观形状设计并不限制,或表面配向电极的配向图样也不限制。 7 more, for example: external shape of the liquid crystal lens design of the zoom is not limited or restricted to the surface with no pattern with the electrode.

图4A所示为单纯电场的电力线的示意图,若上层表面配向电极20a与下层表面配向电极20b分别带正电与负电,则电力线在边缘处会产生非直线的情形。 Figure 4A is a schematic diagram of a simple electric power line, if the upper surface of the alignment with electrodes 20a and 20b, respectively, the lower surface of the electrode is positively charged and negatively charged, the power lines at the edges of the non-linear case is generated. 当在表面配向电极20a与表面配向电极20b间装填成液晶层30后,如图4B所示,当上层表面配向电极20a与下层表面配向电极20b分别带正电与负电时, 液晶层30的液晶分子受电场产生力矩,为要得最小能量状态,液晶层30的液晶分子的主轴线将与外加电场平行(沿电场的切线方向)排列,形成特定排列而产生特定的折射率与光学特性。 When the surface after ligand ligand to the electrode 20a and the surface of the sintering between the electrodes 20b to the liquid crystal layer 30, shown in Figure 4B, when the upper surface is equipped with the electrodes 20a and the lower surface, respectively, positively charged counter electrode 20b and the negative power, a liquid crystal layer 30 molecules by an electric field generated torque, so as to win the minimum energy state, the main axis of the liquid crystal molecules of the liquid crystal layer 30 will produce a particular index of refraction parallel to the optical characteristics (tangential direction of the electric field) arranged to form a specific arrangement of the applied electric field. 由于所述液晶层30的液晶分子的结构为异向性,具有双折射特性,当光线通过所述液晶层30时,光线偏振方向会与液晶分子的主轴线有关,入射光在正交的光场分量使液晶分子产生偏振,当对于电场边缘(例如两电极线的边缘),在电场边缘影响范围之外的区域,电场强迫液晶分子的主轴线方向,使液晶分子在此电场中呈现折射率nO;而在两个电场边缘的电场电力线将使所述液晶层30的液晶分子改变其原本的主轴线,如此在两个电场边缘形成不同的折射率nl;但在两个电场边缘中心,液晶分子并未受到电场影响而改变液晶分子的主轴线,此处的折射率为n。 Since the structure of the liquid crystal layer of the liquid crystal molecules 30 are anisotropic, birefringent, when light passes through the liquid crystal layer 30, the light polarization direction will be related to the main axis of the liquid crystal molecules, the light incident perpendicular to the field component polarized liquid crystal molecules, when the electric field for the edge (e.g., edges of the two electrode lines), the main axis direction of the edge region outside the scope of influence of the electric field, the electric field to force the liquid crystal molecules, the liquid crystal molecules exhibit refractive index in this field nO; while two electric power lines in an electric field will cause liquid crystal molecules in the edge of the liquid crystal layer 30 changes its original principal axis, thus forming a refractive index nl of the two different edges of the electric field; but two edges of the central field, the liquid crystal molecule has not been changed electric field on the main axis of the liquid crystal molecules, where the refractive index is n. 使在Y方向上折射率的变化为nO-nl-n-nl-nO,则形成4斤射率梯度;当对所述上层表面配向电才及20a 与所述下层表面配向电极20b施以不同强度的电场时,在Z方向则产生不同的折射率,此可为光线通过时产生变焦。 Changes in the Y direction so that a refractive index of nO-nl-n-nl-nO, 4 pounds is formed reflectance gradient; when applied to the electrode 20b with the upper surface of the alignment before electrical surface and the lower layer 20a with different when the field intensity is generated in the Z direction different refractive indices, which may be generated when light passes through a zoom.

若所述上层表面配向电极20a与所述下层表面配向电极20b对称,如图5A 与图5B,则电场边缘影响范围之外的区域相对较小,在Y方向上折射率的变化近似为nO-n-nO,则形成与图4B不同的折射率梯度;当对上层表面配向电极20a 与下层表面配向电极20b施以不同强度的电场时,在Z方向则产生不同的折射率,此可为光线通过时产生变焦。 If the upper surface of the alignment with the lower electrodes 20a and 20b symmetrical to the electrode surface, as shown in FIG 5A and 5B, the edge region outside the sphere of influence of the electric field is relatively small, in the Y direction, change in refractive index is approximately nO- n-nO, is formed with a different refractive index gradient in FIG. 4B; when equipped with upper surface electric field applied to the different strength of the electrode 20b to the electrode 20a and the lower surface, a different refractive index is produced in the Z direction, this may be a light produced by zoom.

因此在液晶透镜单元1使用光电场偏振方向与液晶分子的方向不同,而形成折射率不同(折射率梯度)的原理,制成类似GRIN透镜,并通过施以不同外加电场以改变折射率梯度,使入射的光线在液晶透镜单元内部,因折射率的梯度而使光线改变行径角度而聚焦,如图6、 7A、 7B、 7C所示。 Therefore, in the liquid crystal optical field lens unit 1 using a polarization direction different from the direction of the liquid crystal molecules, are formed with different refractive indices (refractive index gradient) principle, similar to the GRIN lens is made, and by subjecting the applied electric field to change the refractive index of different gradient, the incident light lens unit inside the liquid crystal, the refractive index gradient due to the act of changing the angle of the light is focused, as shown in FIG 6, 7A, 7B, 7C shown in FIG. 在图6中,对于不同折射率的梯度,可以;f见为n个层来分析,并遵守斯耐尔定律(snell,s law) 的下列关系式: In FIG. 6, a different refractive index gradient can; see F n layers is analyzed, and to comply with Snell's law (snell, s law) by the following relationship:

"! cos(《)=«2 cos(《)=•••",. cos(《)=•.. = "„ cos(《) (i)其中,ni为假设的第i层的折射率、90。 "! Cos (") = «2 cos (") = ••• ",. cos (") = • .. = "" cos ( ") (i) wherein, ni is the refractive index of the i-th layer hypothesis 90. -0i为第i层光线在第i层与i+l层界面的法线的夹角。 -0i i + l as the angle between the normal of the interface layer level i in the i-th layer of light.

由于液晶在液晶透镜单元受电场强弱不同,形成折射率ni不同,但ni不易量测,则可用平均折射率F与折射率变化率a近似,焦距f则可由下式估计可得:<formula>formula see original document page 9</formula>/ (2) Since the liquid crystal cell in the liquid crystal lens by different field strength, the refractive index ni of different, but difficult to measure ni, the average refractive index can be used and the refractive index change rate F is approximately a focal length f can be estimated by the following equation can be obtained: <formula > formula see original document page 9 </ formula> / (2)

对于一定厚度D的液晶透镜单元的液晶层30,若改变不同的电场强度及方向,将改变液晶透镜的折射率梯度(即改变折射率变化率a与平均折射率^), 则可形成不同的出射角度,因而形成不同的焦距,如图7A、 7B、 7C所示;当对于不同液晶透镜单元透过外加电压于表面配向电极20,可改变其不同折射率, 即可使光线聚焦或发散,可形成如镜片组的变焦功能。 For the liquid crystal layer of a certain thickness D of the lens unit 30, if the change in a different direction and intensity of the electric field, the liquid crystal will change the refractive index gradient lens (i.e., a change in refractive index with the change rate of the average refractive index ^), may be formed of different exit angle, resulting in a different focal length, as shown in FIG 7A, 7B, 7C shown; if the liquid crystal lens units for different ligand to the surface 20, which may be changed through the different refractive indices voltage is applied to the electrode, to focus light or diverging, the zoom lens may be formed functional groups.

更进一步,对于表面配向电极20在上层的表面配向电极20a与下层表面配向电极20b,可设置为对称或不对称,也可设为单孔状配向图样、同心圆状配向图样或其他光学目的设计的图样,以造成不同光圏效果。 Still further, the surface with the electrode 20 is equipped with the electrode 20b, may be arranged symmetrically or asymmetrically to the electrodes 20a and the lower surface of the surface of the upper layer, it can be set to single-hole shape alignment pattern, a concentric shape with the design to the drawing or other optical purposes pattern, rings of light to cause different effects. 为清楚说明本发明的运用情形的实施例,在图2、 3、 8至图10均使用单孔状对称的表面配向电极20。 To clearly illustrate the embodiment of the present invention is the use of the case, with the surface of the electrode 20 of FIG. 2, 3, 8 to 10 using the single-hole shape are symmetric.

第一实施例 First embodiment

参阅图2、 3所示,其是本发明由单层液晶透镜单元所构成的变焦液晶透镜实施例的基本结构,本实施例的单层变焦液晶透镜1,自物侧面起算,包含:单面上设有表面配向电极20的玻璃基板10 (以下称单面电极玻璃基板10b)、间隔片(spacer)40及装填在单面电极玻璃基板10b与间隔片40所形成的容室的液晶层30及单面电极玻璃基板10b;其中,所述间隔片40可为环状片或数个叠加而成;其中,所述玻璃基板10的表面上附着表面配向电极20,所述表面配向电极20在所述玻璃基板IO镀有一金属膜,如铝,银,或金等金属,其金属的选用为可透光金属;所述金属膜通过蚀刻方式成型,若所述表面配向电极20的形式为单孔状配向图样,则形成单孔的光團11;其中,两片玻璃基板10结合后以所述间隔片(spacer) 40定义出其间隙厚度,即所述液晶层30的厚度。 Referring to FIG. 2, 3, which is a basic structure of an embodiment of the present invention is single crystal by the liquid crystal lens a zoom lens unit constituted of a single layer of the liquid crystal of the zoom lens of Example 1 of the present embodiment, starting from the object side, comprising: Single liquid crystal layer 30 is provided on the surface of a glass substrate with the electrode 20 of 10 (hereinafter referred to as a glass substrate one surface electrode 10b), the spacer (spacer) 40 and loaded in the chamber 10b and the glass substrate-surface electrode spacer 40 is formed 10B and the glass substrate-surface electrode; wherein the spacer ring 40 may be formed as a sheet or several superposed; wherein an upper surface of the glass substrate 10 is adhered to the surface with the electrode 20, the electrode 20 to the surface with the IO of the glass substrate coated with a metal film such as aluminum, silver, gold, or other metal, which metal is selected to be opaque metal; forming the metal film by etching, if the surface feature to form a single electrode 20 alignment hole shape pattern, a single hole is formed in the optical group 11; wherein the two glass substrates 10 combined to define said spacers (spacer) 40 which gap thickness, i.e. the thickness of the liquid crystal layer 30.

参阅图8为玻璃基板10上表面配向电极20的黄光制程示意图,本制程图仅说明具有双面表面配向电极20的玻璃基板IO(以下称双面电扭J波璃基板10a) 的制作过程示意图,而所述单面电极玻璃基板10b的单面表面配向电极20的制作过程也相类似,仅在所述玻璃基板10的单面上具有金属膜。 See FIG. 8 is a schematic view of the glass substrate 10 surface with the electrodes photolithography process 20, the present process view illustrating only the glass substrate with the electrode having the double-sided surface 20 IO (hereinafter referred to as the double-sided torsion J wave glass substrate 10a) in the production process a schematic, bottom-surface electrode and said one side surface of the glass substrate 10b with the production process is also similar to the electrode 20, having a metal film on only one surface of the glass substrate 10. 首先,先在所述玻璃基板10的表面上以沉积法或溅镀法镀上一层金属膜50,再使用黄光制程加以蚀刻成所需要的表面配向电极20配向图样;其加工步骤如下:在所述金属膜50外侧设一光阻层51,再在所述光阻层51外侧罩设一特定配向图样的光罩52, 再经曝光、显影、沖洗及蚀刻等相关程序以移除非所述表面配向电极20的其余光阻层及金属膜,只保留所述表面配向电极20所对应的光阻层及金属膜,再去除光阻层51,即成型出表面配向电极20。 First of all, first to deposition or sputtering coated on a surface of the glass substrate 10, a metal film 50, and then to be surface etched into a desired alignment to the electrode 20 with the pattern using the photolithography process; The processing steps are as follows: a photoresist layer 51 is disposed outside of the metal film 50, is provided with a particular reticle pattern 52 to further resist layer 51 outside the cover, and then exposure, development, etching and rinsing to remove non-related program the surface of the alignment film remaining photoresist layer and the metal electrode 20, leaving only the surface of the electrode 20 corresponding to the alignment of the photoresist layer and the metal film, and then removing the photoresist layer 51, i.e. the molding surface ligands to the electrode 20. 若欲使所述玻璃基板10的双面的表面配向电极20具有对称配向图样,在黄光制成时可使用所述光罩52,以双面黄光制程机台来制作一次完成蚀刻;对于双面不同的表面配向电极20,则分别使用不同的光罩52,可使用单面制作黄光制程机台来制作。 If connecting both sides of the glass substrate 20 having a surface 10 with the symmetrical patterns may be formed using the reticle 52 in yellow to yellow-sided machine process to produce a complete etching with the electrodes; for different sided surface ligands to the electrode 20, respectively, using a different mask 52, can be made single-sided photolithography process to produce the machine.

一般而言,为使操作电压不致太高,单孔状的表面配向电极20所形成的光圏11的大小与所述液晶层30的厚度比约为2.5比1,所述光圏11的大小可以从10(Him到lmm不等;对于不同厚度的液晶层30,可使用不同厚度的间隔片40所构成。在本实施例使用的液晶材料为相列型液晶E7,在物侧的玻璃基板10 使用1 mm厚度的玻璃基板,在像侧的玻璃基板10使用0.5 mm厚度的玻璃基板10,液晶层30的厚度D420nm。 Generally, as the operator will not be too high a voltage, single-perforated surface of the light rings of size 11 with the electrode 20 is formed with the thickness of the liquid crystal layer 30 was about 2.5 to 1, the optical rings of size 11 from 10 (Him ranging from lmm to; the liquid crystal layer 30 of different thickness, different thickness of the spacer 40 constituting the liquid crystal material in the embodiment of the present embodiment is used as a nematic liquid crystal E7, on the object side glass substrate. the glass substrate 10 using 1 mm thickness, D420nm thickness of the image side of the glass substrate 10 using 0.5 mm thickness of the glass substrate 10, liquid crystal layer 30.

当对表面配向电纟及20施以电压后,可产生电场,进而改变所述液晶层30 的折射率,在本实施例其关系如表一及图2.7A-7C,当欲改变单层变焦液晶透镜1的焦距时,则于玻璃基板10两侧的表面配向电极电极20施以表一的电压差。 When the surface of Si and 20 electrically with the applied voltage, an electric field, thereby changing the refractive index of the liquid crystal layer 30, embodiment of the relationship shown in Table I and FIG. 2.7A-7C present, to be changed when a zoom single when the focal length of the liquid crystal lens 1, the surface on both sides of the glass substrate 10 to the electrode 20 applied with a voltage difference table.

表一、 Table I,

焦距focal length(mm) 电压Voltage(V) Focal length focal length (mm) Voltage Voltage (V)

1 0.877 2.68 1 0.877 2.68

2 1.013 2.31 2 1.013 2.31

1.111 2.15 1.111 2.15

4 1.226 2.03 4 1.226 2.03

6 1.418 1.89 6 1.418 1.89

1.514 1.82 1.514 1.82

8 1.720 1.74 8 1.720 1.74

9 l細 1.6810 2.217 1.59 Fine 1.6810 2.217 1.59 9 l

11 2.525_^_ 11 2.525 _ ^ _

表二至表五为四个不同焦距时,单层变焦液晶透镜1的焦距f(mm)、焦数 Table V Table Two to four different focal lengths, single crystal of the zoom lens of focal length f 1 (mm), the number of coke

FNo、后焦距(BL)(mm),对于在光轴上入射光线与光轴夹角0各角度下的均方才艮光点(spot size rms, root-means-square nm)、几4可光点(GEO spot size, Geometric,' pm)、切线场曲(field TAN, Tangential field curvature),弧矢场曲(field SAG, Sagittal field curvature)、畸变率(distortion rate)% 、在60°TAN调制传递函数(MTF, modulation transfer function )与60°SAG MTF的相关数据,可供给相机、 手机相机等装置的成像镜头使用。 FNo, the focal length (BL) (mm), on the optical axis are just for Gen spot (spot size rms, root-means-square nm) at an angle of incident light and the optical axis 0 of each angle, a few photo-4 point (GEO spot size, Geometric, 'pm), the tangent curvature of field (field TAN, tangential field curvature), sagittal field curvature (field sAG, sagittal field curvature), distortion (distortion rate)%, at 60 ° TAN modulation transfer function (MTF, modulation transfer function) and 60 ° SAG MTF related data, may be supplied to the imaging lens cameras, camera phones and other devices used.

表二 Table II

f=10i:? Fno=6.786 BL=0.658 f = 10i :? Fno = 6.786 BL = 0.658

~~光轴夹角~~均方根光点几何光点¥1 ~~畸变鄉60。 ~ ~ ~ ~ Angle between the optical axis of the light spot are Fang Genguang point geometry. 1 ~ ¥ 60 rural distortion. MTT 60。 MTT 60. MTF angle(deg.) spotsize RMSspotsize GEOField TANField SAG Distortion MTF(TAN)MTF(SAG) MTF angle (deg.) Spotsize RMSspotsize GEOField TANField SAG Distortion MTF (TAN) MTF (SAG)

<table>table see original document page 11</column></row> <table> <Table> table see original document page 11 </ column> </ row> <table>

表三_ Table III _

f= 1.111 Fno=7.422 BL=0.753 f = 1.111 Fno = 7.422 BL = 0.753

光轴夹角~均方根光点几何光点~~~~畸变熟60,' 60UMTF angle(deg.) spotsize RMSspotsize GEOField TANField SAG Distortion MTF(TAN)MTF(SAG) Average angle between the optical axis Fang Genguang ~ ~ ~ ~ ~ point geometry distortion cooked spot 60, '60UMTF angle (deg.) Spotsize RMSspotsize GEOField TANField SAG Distortion MTF (TAN) MTF (SAG)

<table>table see original document page 11</column></row> <table> <Table> table see original document page 11 </ column> </ row> <table>

表四f=1.72 Fno= 11.489 BL= 1.363 Table IV f = 1.72 Fno = 11.489 BL = 1.363

光轴夹角~~均方根光点几何光点¥1 ~~畸变熟60°MTF 60°MTF angle(deg.) spotsize RMSspotsize GEOField TANField SAG Distortion MTF(TAN)MTF(SAG) Average angle between the optical axis ~~ Fang Genguang point geometry. 1 ~ ¥ spot distortion cooked 60 ° MTF 60 ° MTF angle (deg.) Spotsize RMSspotsize GEOField TANField SAG Distortion MTF (TAN) MTF (SAG)

0.0 0.202 0.428 O細 0.000 O細 0.500 0.500 Fine 0.0 0.202 0.428 O 0.500 0.500 0.000 O thin

2.5 0.282 0.779 -O細 -0.002 -0.015 0.500 0.500 2.5 0.282 0.779 -O fine -0.002 -0.015 0.500 0.500

5.0 0.600 1.542 -0.018 -0.007 -0.067 0.497 0.500 5.0 0.600 -0.018 -0.007 1.542 -0.067 0.497 0.500

7.5 1.179 2.739 -0.041 -O馬 -0.145 0.489 0.499 7.5 1.179 2.739 -0.041 -O horse -0.145 0.489 0.499

10.0 2扁 4.398 -0.070 -0.028 -0.251 0.468 0.496 10.0 2 -0.070 -0.028 4.398 -0.251 0.468 flat 0.496

12.5 3.132 6.565 -0.112 -0.045 -0.402 0.426 0.489 12.5 3.132 6.565 -0.112 -0.045 -0.402 0.426 0.489

15.0 4.544 9.295 -0.157 -0.064 -0.562 0.359 0.476 15.0 4.544 9.295 -0.157 -0.064 -0.562 0.359 0.476

表五 Table V

f= 2.525 Fno= 16.872 BL-2.171 f 2.525 Fno = 16.872 BL-2.171 =

光轴夹角~均方根光点几何光点~~¥1 ~~畸变熟60°MTF 60°MTF angle(deg.) spotsize RMSspotsize GEOField TANField SAG Distortion MTF(TAN)MTF(SAG) The angle between the optical axis point geometry Fang Genguang average ~ ~~ ¥ 1 ~~ spot distortion cooked 60 ° MTF 60 ° MTF angle (deg.) Spotsize RMSspotsize GEOField TANField SAG Distortion MTF (TAN) MTF (SAG)

0.0 0.217 0.426 O細 O扁 O扁 0.292 0.292 0.0 0.217 0.426 O O thin flat flat 0.292 O 0.292

2.5 0.280 0.725 -0.006 -0.003 -0.010 0.292 0.292 2.5 0.280 -0.003 -0.010 0.725 -0.006 0.292 0.292

5.0 0.593 1.486 -0.029 -0.011 -0.046 0.292 0.293 5.0 0.593 1.486 -0.029 -0.011 -0.046 0.292 0.293

7.5 1.194 2.638 -0.063 -0.025 -0.100 0.289 0.293 7.5 1.194 2.638 -0.063 -0.025 -0.100 0.289 0.293

10.0 2.072 4.301 -0.109 -0.043 -0.173 0.283 0.292 10.0 2.072 4.301 -0.109 -0.043 -0.173 0.283 0.292

12.5 3.239 6.488 -0.173 -0.070 -0.277 0.269 0.291 12.5 3.239 6.488 -0.173 -0.070 -0.277 0.269 0.291

15.0 4.718 9.255 -0.243 -0.098 -0.387 0.246 0.288 15.0 4.718 9.255 -0.243 -0.098 -0.387 0.246 0.288

第二实施例 Second embodiment

参阅图9所示,其是本发明由双层液晶透镜单元所构成的的双层变焦液晶透镜的实施例基本结构。 Referring to FIG. 9, which is a basic construction of the liquid crystal lens according to the present invention consists of a double double zoom lens of the liquid crystal cell is constituted. 本实施例的双层变焦液晶透镜2,自物侧面起算,包含: 单面电相J皮璃基;f反10b、间隔片40及第一层液晶层30、双面电极玻璃基^反10a、 间隔片40及第二层液晶层30及单面电极玻璃基才反10b;其中,所述单面电极玻璃基板10b与所述双面电极玻璃基板10a之间,以所述间隔片40分别定义出两层液晶层30的厚度。 Double zoom lens of the present embodiment of the liquid crystal 2, starting from the object side, comprising: a single-sided glass yl electrical phase transdermal J; F anti-10b, the spacer layer 40 and the second liquid crystal layer 30, a double-sided electrode glass substrate 10a ^ trans , the spacer 40 and the second layer and the liquid crystal layer 30 was trans-surface electrode 10b glass substrate; wherein the glass substrate between the one surface electrode 10b and the double-sided electrode glass substrate 10a, the spacer 40, respectively to define the thickness of the two liquid crystal layer 30. 当入射光线在经过所述变焦液晶透镜2的第一层液晶层30 产生第一次折射后,再进入所述液晶透镜单元2的第二层液晶层30,可以产生第二次折射;当控制第一层电压使第一层液晶层30形成折射率nl、控制第二层电压使所述第二层液晶层30形成折射率n2,经由式(2)可计算出光线聚焦的位置;同理在使用于相机或手机相机等装置上,对于不同焦距的变焦需求上,只要控制第一层电压与第二层电压产生匹配,可达到变焦效果,相较于传统透镜多片组合模块可以省去许多空间。 When the incident light after passing through the zoom lens of the first liquid crystal layer 30 of the liquid crystal layer 2 is produced first refracted, then enters the liquid crystal layer of the liquid crystal lens unit 30 in the second layer, the second refraction can be produced; and when the control a first layer of a first voltage of the liquid crystal layer 30 is formed layer refractive index nl, the control voltage of the second layer, the second layer of liquid crystal layer 30 is formed a refractive index n2, through the formula (2) to calculate the position of the focused light; empathy in the use of the camera or cell phone cameras and other devices, for the needs of different focal lengths of the zoom, the first layer as long as the control voltage generating voltage matches the second layer, can achieve a zoom effect, as compared to a conventional lens multi-chip module may be omitted composition a lot of space.

12为说明方便,在本实施例中,采用如同第一实施相同的液晶层30、相同厚度的间隔片40、相同材质与厚度的玻璃基板10、表面配向电极20等;为达总体焦距为0.866mm,则对第一层液晶层30 (即第一液晶透镜单元)施以2.15V 电压使其产生焦距为l.lllmm、对第二层液晶层30 (即第二液晶透镜单元)施以1.49V电压j吏其产生焦if巨为2.525mm,表六为在本实施例焦if巨为0.866mm时, 12 for the convenience of explanation, in the present embodiment, employed as the same liquid crystal layer 30, the spacer of the same thickness of the first embodiment 40, the glass substrate having the same material and thickness 10, the surface with the electrodes 20 and the like; To achieve the overall focal length of 0.866 mm, the first layer of the liquid crystal layer 30 (i.e., a first lens unit of the liquid crystal) applied voltage of 2.15V to produce focal length l.lllmm, the second layer of the liquid crystal layer 30 (i.e., the second liquid crystal lens unit) subjected 1.49 Official voltage V j which generates power as if a giant 2.525mm, table VI as Example of the present embodiment when power if giant of 0.866mm,

对于在光轴上入射光线与光轴夹角e各角度下的均方根光点、几何光点、切线 For both Fang Genguang point on the optical axis and the optical axis angle of incident light at each angle e, the light spot geometry, tangent

场曲、弧矢场曲、畸变率%、在60。 Curvature of field, sagittal field curvature, distortion%, at 60. TAN调制传递函数与60。 TAN 60 and the modulation transfer function. SAGMTF的相关数据,可供给相机、手机相机等装置的成像镜头使用。 SAGMTF relevant data can be supplied to the imaging lens cameras, camera phones and other devices used. 表六 Table VI

"~光轴夹角~~均方根光点几何光点M Wl~~崎变率% 60°MTF 60°MTF angle(deg.) spotsize RMSspotsize GEOField TAN Field SAG Distortion MTF(TAN)MTF(SAG) '~ ~ ~ Axis angle are Fang Genguang point geometry spot M Wl ~~ Kawasaki variability% 60 ° MTF 60 ° MTF angle (deg.) Spotsize RMSspotsize GEOField TAN Field SAG Distortion MTF (TAN) MTF (SAG)

0.0 0.151 0.348 O扁 O扁 O細 0.743 0.743 0.0 0.151 0.348 O O thin flat flat O 0.743 0.743

2.5 0.225 0.528 -O扁 0.000 -0.058 0.743 0.743 2.5 0.225 0.528 -O flat -0.058 0.743 0.743 0.000

5.0 0.413 0.962 -0.004 -0.002 -0.263 0.740 0,743 5.0 0.413 0.962 -0.004 -0.002 -0.263 0.740 0,743

7.5 0.700 1.670 -O扁 -0.005 -0.568 0.733 0.741 7.5 0.700 1.670 -O flat -0.005 -0.568 0.733 0.741

10.0 1.095 2.606 -0.016 -O細 -0.990 0.718 0.738 10.0 1.095 2.606 -0.016 -O fine -0.990 0.718 0.738

12.5 1.602 3.747 -O扁 -0.013 -1.604 0.6卯 0.732 12.5 1.602 3.747 -O flat -0.013 -1.604 0.732 0.6 d

15.0 2.229 5.106 -0.036 -0.018 -2.271 0.644 0.721 15.0 2.229 5.106 -0.036 -0.018 -2.271 0.644 0.721

当为变焦至总体焦距为0.746mm时,则对第一层液晶层30 (即第一液晶透镜单元)施以1.74V电压使其产生焦距为1.720mm、对第二层液晶层30 (即第二液晶透镜单元)施以2.31V电压使其产生焦距为1.013mm。 When the entire focal length of the zoom to 0.746mm, the first layer of the liquid crystal layer 30 (i.e., a first lens unit of the liquid crystal) applied voltage of 1.74V to produce a focal length of 1.720mm, the second layer of the liquid crystal layer 30 (i.e. second liquid crystal lens unit) 2.31V applied voltage to produce a focal length of 1.013mm. 表七为在本实施例焦距为0.746mm时,对于在光轴上入射光线与光轴夹角9各角度下的均方根光点、几何光点、切线场曲、弧矢场曲、畸变率%、在60。 Table VII is a focal length of the present embodiment when the embodiment is 0.746mm, for both Fang Genguang point on the optical axis at respective angles 9 and the optical axis angle of incident light, the light spot geometry, the tangent curvature of field, sagittal field curvature, distortion rate% at 60. TAN调制传递函数与60。 TAN 60 and the modulation transfer function. SAGMTF的相关数据,可供给相机、手机相机等装置的成像镜头使用。 SAGMTF relevant data can be supplied to the imaging lens cameras, camera phones and other devices used.

表七 Table VII

f= 0.746 Fno= 4.974 BL= 0.214 f = 0.746 Fno = 4.974 BL = 0.214

光轴夹角~均方稂光点儿何光点"~^"H Wl~~畸货扭6(^MTF"~5iPMTF angle(deg.) spotsize RMSspotsize GEOField TANField SAG DistortionMTF(TAN)MTF(SAG) ~ Axis angle mean square grass where little light spot "~ ^" H Wl ~~ torsional distortion cargo 6 (^ MTF "~ 5iPMTF angle (deg.) Spotsize RMSspotsize GEOField TANField SAG DistortionMTF (TAN) MTF (SAG)

0.0 0.279 0.482 O扁 0.003 0.000 0.778 0.778 0.0 0.279 0.482 O 0.003 0.000 0.778 0.778 flat

2.5 0.315 0.599 O扁 0.003 -0.074 0.777 0.778 2.5 0.315 0.599 O 0.777 0.778 -0.074 0.003 flat

5.0 0.417 0.801 O扁 O麓 -0.332 0.773 0.778 5.0 0.417 0.801 O 0.773 0.778 -0.332 flat foot O

7.5 0.578 1.098 -O扁 O細 -0.720 0.766 0.778 7.5 0.578 1.098 -O flat thin -0.720 0.766 0.778 O

10.0 0.795 1.483 -0.004 -0.001 -1.255 0.755 0.777 10.0 0.795 1.483 -0.004 -0.001 -1.255 0.755 0.777

12.5 l扁 2.139 -O扁 -0.004 -2.032 0.739 0.774 12.5 l 2.139 -O flat flat -0.004 -2.032 0.739 0.774

15.0 1.396 2.936 -0.013 -0.007 -2.880 0.709 0.775第三实施例 Example 15.0 1.396 2.936 0.709 0.775 -0.013 -0.007 -2.880 third

参阅图IO所示,其是本发明由三层液晶透镜单元所构成的的三层变焦液晶 Referring to FIG IO shown, which is a three-layer liquid crystal zoom lens of the present invention is a three-layer liquid crystal cell composed of

透镜3的实施例基本结构。 The basic lens structure of Example 3 of the embodiment. 本实施例的三层变焦液晶透镜3,自物侧面起算,包含:单面电极玻璃基板10b、间隔片40及第一层液晶层30、双面电极玻璃基板10a、间隔片40及第二层液晶层30、双面电才及玻璃基板10a、间隔片40及第三层液晶层30及单面电极玻璃基板10b;所述单面电极玻璃基板10b与所述双面电极玻璃基板10a之间,以所述间隔片40分别定义出三层液晶层30的厚度。 Three liquid crystal zoom lens of the present embodiment 3, starting from the object side, comprising: a glass substrate one surface electrode 10b, the spacer layer 40 and the second liquid crystal layer 30, a glass substrate, a double-sided electrode 10a, the spacer 40 and the second layer liquid crystal layer 30, and only the double-sided glass substrate 10a, the spacer 40 and the second liquid crystal layer 30 and the three-sided electrode substrate 10b glass; glass substrate between the electrode 10b and one side of the double-sided electrode glass substrate 10a to define the spacers 40 having a thickness of three of the liquid crystal layer 30. 当入射光线在经过所述三层变焦液晶透镜3的第一层液晶层30产生第一次折射后,再进入所述变焦液晶透镜3的第二层液晶层30产生第二次折射,再进入所述液晶透镜单元3的第三层液晶层30产生第三次折射;当控制第一层电压使所述第一层液晶层30形成折射率nl、控制第二层电压使所述第二层液晶层30形成折射率n2、控制第三层电压使所述第三层液晶层30形成折射率n3,经由式(2) 可计算出光线聚焦的位置;同理在使用于相机或手机相机等装置上,对于不同焦距的变焦需求上,只要控制第一层电压、第二层电压与第三层电压产生匹配, 可达到变焦效果,相较于传统透镜多片组合模块可以省去许多空间。 When the incident light after three zoom lens of the first liquid crystal layer 30 of the liquid crystal layer 3 to produce the first refracted, then enters the zoom lens in the second liquid crystal layer 30 of the liquid crystal layer 3 to produce a second refracted, then enters a third lens unit of the liquid crystal layer 30 of the liquid crystal layer 3 to produce a third refractive power; a first layer of the control voltage when the layer of liquid crystal layer 30 is formed first refractive index nl, the control voltage of the second layer, the second layer a refractive index of the liquid crystal layer 30 is n2, a third layer of the control voltage of the liquid crystal layer 30 is formed the third layer a refractive index n3, via the formula (2) to calculate the position of the focused light; similarly using the camera or cell phone cameras, etc. apparatus, on the zoom demand for different focal lengths, as long as the control voltage of the first layer, the second layer and the third layer voltage generating voltage matching, zoom effect can be achieved, compared to conventional multi-chip lens compositions module can save a lot of space. 由上可知,本发明至少具有以下优点: From the result, the present invention has at least the following advantages:

(1) 、本发明的变焦液晶透镜,以液晶透镜单元IO来做变焦动作,不需要加入力学移动机制,整体模块可以做得比较轻薄短小。 (1), the zoom lens of the present invention, the liquid crystal, the liquid crystal lens unit IO do zooming operation, without the addition of mechanical moving mechanism, the entire module can be made relatively thin short.

(2) 、本发明的变焦液晶透镜,每层液晶层30之间使用铝膜(或银膜等其他合适的透光金属)的表面配向电极20结构来取代现有ITO电极,可减少成本。 (2), the zoom lens of the present invention, a liquid crystal, to replace the existing ITO electrode with the electrode structure 20 between the liquid crystal layer 30 each use an aluminum film surface (or other suitable light-transmissive film silver metal), the cost can be reduced.

(3) 、本发明的变焦液晶透镜,其中液晶透镜单元的表面配向电极20可由单孔状、同心圆状等不同配向图样设计,通过表面配向电极20产生的不同电场型式,可产生不同的光圏大小效果,再通过单层或多层液晶透镜单元组合成变焦液晶透镜,可构成实用的相机、手机相机或影像处理装置的变焦镜头。 (3), the zoom liquid crystal lens of the present invention, wherein the surface of the liquid crystal lens unit alignment 20 may be single-hole shape, a concentric circle shape or the like electrodes of different ligands to the design drawings, the surface feature to a different field pattern electrode 20 is produced, may produce different light rings of size effect, zoom and then combined into a single or multilayer liquid crystal lens by the lens unit, the zoom lens may constitute a practical camera, mobile phone camera, or the image processing apparatus.

以上说明对本发明而言只是说明性的,而非限制性的,本领域普通技术人员理解,在不脱离以下所附权利要求所限定的精神和范围的情况下,可做出许多修改,变化,或等效,但都将落入本发明的保护范围内。 For the present invention described above is illustrative only, and not restrictive, those of ordinary skill in the art understand, without departing from the following claims as defined by the appended spirit and scope, many modifications, variations, or equivalent, but it will fall within the scope of the present invention.

Claims (8)

  1. 1、一种变焦液晶透镜,其包括单层液晶透镜单元;所述单层液晶透镜单元利用两片预定厚度的玻璃基板,制成单面电极玻璃基板或双面电极玻璃基板,再将两片电极玻璃基板通过间隔片以预定间距平行排列,使两片电极玻璃基板之间形成一层预定厚度的容室空间供封存液晶以形成一液晶层而构成;其特征在于: 所述单面电极玻璃基板或所述双面电极玻璃基板上设有表面配向电极,所述表面配向电极在所述玻璃基板的表面上设置一可透光的金属膜,再通过蚀刻方式形成预定的配向图样,且各电极玻璃基板上的电极独立控制以分别施以电压; 当对两电极玻璃基板的表面配向电极施以特定的电压时,调控液晶透镜单元的液晶层中液晶分子的排向,进而产生特定的折射率。 1, a variable focus liquid crystal lens, which comprises a single layer liquid crystal lens unit; the single layer liquid crystal lens unit using two glass substrates in a predetermined thickness, a glass substrate made of single-sided or double-sided electrode substrate is a glass electrode, then the two a glass substrate by electrode spacers arranged in parallel at predetermined intervals, so that the electrode glass substrate two chamber spaces between the donor layer of a predetermined thickness to form a sealed liquid crystal constituting the liquid crystal layer; wherein: the glass-surface electrode or double-sided substrate provided with the electrode to the electrode with the surface of the glass substrate, the surface of the metal film is provided with a light-transmissive glass substrate on the surface of the electrode is further formed with a predetermined pattern by the etching, and each electrodes on the electrode of the glass substrate are independently controlled to applied voltage; when the surface of the two electrodes of the glass substrate applied with a specific voltage to the electrodes, the liquid crystal layer of the liquid crystal lens regulation unit to discharge the liquid crystal molecules, thereby generating a particular refraction rate.
  2. 2、 一种变焦液晶透镜,包括双层液晶透镜单元;所述双层液晶透镜单元利用三片预定厚度的玻璃基板,制成单面电极玻璃基板或双面电极玻璃基板,再将所述三片电极玻璃基板通过间隔片以预定间距平行排列,使相邻两电极玻璃基板之间分别形成一层预定厚度的容室空间供封存液晶以形成两层液晶层而构成;其特征在于:所述单面电极玻璃基板或所述双面电极玻璃基板上设有表面配向电极,所述表面配向电极在所述玻璃基板的表面上设置一可透光的金属膜,再通过蚀刻方式形成预定的配向图样,且各电极玻璃基板上的电极独立控制以分别施以电压;当对相邻两电极玻璃基板的表面配向电极施以特定的电压时,调控各层液晶透镜单元的液晶层中液晶分子的排向,进而产生特定的折射率。 2, a variable focus liquid crystal lens, a liquid crystal lens comprises a double unit; the double liquid crystal lens unit utilizes three predetermined thickness of the glass substrate, a glass substrate made of single-sided or double-sided electrode of an electrode glass substrate, and then the three a glass substrate by an electrode sheet spacers arranged in parallel at predetermined intervals, the adjacent chamber space are formed of a layer of predetermined thickness between two glass substrates for storage electrode to form two liquid crystal constituting the liquid crystal layer; wherein: the electrodes provided on one surface of a glass substrate or the glass substrate surface with a double-sided electrode to electrode, a surface with a light-transmissive metal film on the surface of the glass substrate to the electrode, and then forming a predetermined alignment by etching pattern, and the electrode on the glass substrate of each electrode is independently controlled in each applied voltage; the liquid crystal layer when the surface of the glass substrate adjacent electrodes applied with a specific voltage to the electrodes, the liquid crystal lens regulation layers of liquid crystal molecules in the cell to row, and thus produce a specific refractive index.
  3. 3、 一种变焦液晶透镜,包括三层以上液晶透镜单元所构成;所述三层以上液晶透镜单元利用四片以上预定厚度的玻璃基板,制成单面电极玻璃基板或双面电极玻璃基板,再将所述各电极玻璃基板通过间隔片以预定间距平行排列,使相邻两电极玻璃基板之间分别形成一层预定厚度的容室空间供封存液晶以形成两层液晶层而构成;其特征在于:所迷单面电极玻璃基板或所述双面电极玻璃基板上设有表面配向电极,所述表面配向电极在所述玻璃基板的表面上设置一可透光的金属膜,再通过蚀刻方式形成预定的配向图样,且各电极玻璃基板上的电极可独立控制以分别施以电压;当对相邻两玻璃基板的表面配向电极施以特定的电压时,调控各层液晶透镜单元的液晶层中中液晶分子的排向,进而产生特定的折射率。 3, a variable focus liquid crystal lens, comprising three or more lens units constituting the liquid crystal; the three or more than four liquid crystal lens unit using a predetermined thickness of glass substrates, a glass substrate made of single-sided or double-sided electrode substrate is a glass electrode, said electrodes and then a glass substrate by spacers arranged in parallel at predetermined intervals, so that chamber space are formed of a layer of predetermined thickness between two electrodes of adjacent glass substrates for liquid crystal sealed to form a liquid crystal layer composed of two layers; wherein wherein: one side of the electrode glass substrate surface is provided with a fan or to the electrode, with the surface of a metal film may be disposed on a surface of the transparent glass substrate to the electrode, then by etching the electrode on both sides of a glass substrate forming a predetermined pattern alignment, the electrodes on each electrode and the glass substrate may be independently controlled to applied voltage, respectively; and when the surface of the two adjacent glass substrates with a particular applied voltage to the electrodes, the liquid crystal layer of the liquid crystal layers regulation lens unit row to the liquid crystal molecules, thereby to produce a specific refractive index.
  4. 4、 如权利要求l、 2或3所述的变焦液晶透镜,其特征在于,所述玻璃基板表面上所设的可透光金属膜为铝或银。 4, as claimed in claim l, 2 or 3, the zoom lens of the liquid crystal, characterized in that the light-permeable metal film on the glass substrate surface provided is aluminum or silver.
  5. 5、 如权利要求l、 2或3所述的变焦液晶透镜,其特征在于,所述玻璃基膜,再在所述金属膜上涂布一光阻层,再在所述光阻层上罩设一特定配向图样的光罩层,再经显影、蚀刻程序以移除非电极部分的光阻层及金属膜,而保留电极部分的光阻层及金属膜,再去除光阻层而形成。 5, as claimed in claim l, 2 or 3, the zoom lens of the liquid crystal, wherein said glass base film, and then the metal film is coated a photoresist layer, and then the photoresist layer is covered on provided with a specific pattern to the mask layer, and then by developing, etching process to remove the photoresist layers and the non-electrode portion of the metal film, and the photoresist layer while retaining the metal film electrode portion, and then removing the photoresist layer is formed.
  6. 6、 如权利要求l、 2或3所述的变焦液晶透镜,其特征在于,所述玻璃基板表面上的表面配向电极是先在玻璃基板的表面上以溅镀法镀上一层金属膜,再在所述金属膜上涂布一光阻层,再在所述光阻层上罩设一特定配向图样的光罩层,再经显影、蚀刻程序以移除非电极部分的光阻层及金属膜,而保留电极部分的光阻层及金属膜,再去除光阻层而形成。 6, as claimed in claim l, 2 or 3, the zoom lens of the liquid crystal, characterized in that the surface on the glass substrate surface with the first electrode is coated by sputtering a metal film on the surface of the glass substrate, then the metal film is coated a photoresist layer, the photoresist layer and then on the mask layer is provided to cover a specific pattern feature, and then by developing, etching process to remove the photoresist layer and the non-electrode portion a metal film, while retaining the photoresist layer and the metal electrode portion of the film, and then removing the photoresist layer is formed.
  7. 7、 如权利要求l、 2或3所述的变焦液晶透镜,其特征在于,所述表面配向电极的配向图样为单孔状。 7, as claimed in claim l, 2 or 3, the zoom lens of the liquid crystal, characterized in that the surface pattern is aligned with the hole-shaped electrode.
  8. 8、 如权利要求l、 2或3所述的变焦液晶透镜,其特征在于,所述表面配向电极的配向图样为同心圆状。 8, as claimed in claim l, 2 or 3, the liquid crystal zoom lens, wherein said alignment surface with the electrode pattern of concentric circles.
CN 200810212351 2008-09-10 2008-09-10 Zoom liquid crystal lens CN101672990B (en)

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CN102749769A (en) * 2012-07-16 2012-10-24 四川大学 2D/3D switchable free stereo display device based on double-layer liquid crystal lenses
CN102809865A (en) * 2011-05-20 2012-12-05 株式会社日本显示器东 The image display apparatus and a liquid crystal lens
CN104081260A (en) * 2012-01-30 2014-10-01 日本电气硝子株式会社 Liquid-crystal lens and liquid-crystal lens-cell
CN104914643A (en) * 2014-03-12 2015-09-16 点晶科技股份有限公司 Optical zoom structure
CN105334691A (en) * 2015-12-15 2016-02-17 深圳市时代华影科技股份有限公司 High-luminous-efficacy 3D system capable of adapting to video halls of various sizes

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EP1688783B1 (en) 2003-11-27 2009-10-14 Asahi Glass Company Ltd. Optical element using liquid crystal having optical isotropy
CN100492505C (en) 2004-02-03 2009-05-27 旭硝子株式会社 Liquid crystal lens element and optical head device
CN100587819C (en) 2004-10-19 2010-02-03 旭硝子株式会社 Liquid crystal diffractive lens element and optical head device

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Publication number Priority date Publication date Assignee Title
CN102809865A (en) * 2011-05-20 2012-12-05 株式会社日本显示器东 The image display apparatus and a liquid crystal lens
CN102809865B (en) * 2011-05-20 2016-04-06 株式会社日本显示器 The image display apparatus and a liquid crystal lens
US9405167B2 (en) 2012-01-30 2016-08-02 Nippon Electric Glass Co., Ltd. Liquid-crystal lens and liquid-crystal lens-cell
CN104081260A (en) * 2012-01-30 2014-10-01 日本电气硝子株式会社 Liquid-crystal lens and liquid-crystal lens-cell
CN104081260B (en) * 2012-01-30 2016-11-09 日本电气硝子株式会社 Lens and the liquid crystal cell with the liquid crystal lens
CN102749769A (en) * 2012-07-16 2012-10-24 四川大学 2D/3D switchable free stereo display device based on double-layer liquid crystal lenses
CN104914643A (en) * 2014-03-12 2015-09-16 点晶科技股份有限公司 Optical zoom structure
CN105334691A (en) * 2015-12-15 2016-02-17 深圳市时代华影科技股份有限公司 High-luminous-efficacy 3D system capable of adapting to video halls of various sizes

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