WO2010013347A1 - Liquid for liquid lens and liquid lens - Google Patents
Liquid for liquid lens and liquid lens Download PDFInfo
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- WO2010013347A1 WO2010013347A1 PCT/JP2008/063881 JP2008063881W WO2010013347A1 WO 2010013347 A1 WO2010013347 A1 WO 2010013347A1 JP 2008063881 W JP2008063881 W JP 2008063881W WO 2010013347 A1 WO2010013347 A1 WO 2010013347A1
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- butylnaphthalene
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- liquid lens
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B3/00—Simple or compound lenses
- G02B3/12—Fluid-filled or evacuated lenses
- G02B3/14—Fluid-filled or evacuated lenses of variable focal length
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B26/00—Optical devices or arrangements for the control of light using movable or deformable optical elements
- G02B26/004—Optical devices or arrangements for the control of light using movable or deformable optical elements based on a displacement or a deformation of a fluid
- G02B26/005—Optical devices or arrangements for the control of light using movable or deformable optical elements based on a displacement or a deformation of a fluid based on electrowetting
Definitions
- the present invention relates to a liquid lens having an autofocus function or an autofocus function, and a liquid for a liquid lens.
- This technology is a technology that realizes an autofocus function without moving the lens by controlling the interface shape of two types of liquids with voltage.
- Optical zooming is also possible by using two liquid lenses (zoom liquid lens, autofocus liquid lens) and a solid lens.
- JP 2005-518052 gazette JP 2006-72295 A NIKKEI ELECTRONICS 2005.10.24 p. 129 European Physical Journal E Vol3 (2000) p. 159-163
- the liquid lens it is important to control the interface of the liquid by voltage, to keep the density of the two kinds of liquids equal, and to keep the droplet shape stable.
- a conductive aqueous solution is used to facilitate the control of the liquid interface by voltage.
- specific properties of the second liquid include hydrophobicity from the viewpoint of separability from conductive water, and a sufficiently higher refractive index than water in order to lower the applied voltage when deforming the interface.
- liquids such as 1-bromodecane and chloronaphthalene, bromonaphthalene, and silicone oil are known, but these liquids do not satisfy these properties at the same time.
- An object of the present invention is to provide a second liquid of a liquid for a liquid lens that is used together with a conductive aqueous solution that is a first liquid and has the above characteristics.
- the inventors have found that a composition containing a naphthalene derivative satisfies the above characteristics, and have completed the invention. That is, according to the present invention, the following liquid for liquid lens and liquid lens are provided.
- a liquid lens liquid containing alkylnaphthalenes [1] A liquid lens liquid containing alkylnaphthalenes.
- the alkyl group is any one of a methyl group, an ethyl group, an n-propyl group, an i-propyl group, an n-butyl group, a sec-butyl group, and a tert-butyl group. Liquid for liquid lenses.
- the alkylnaphthalenes are 1-methylnaphthalene, 1-ethylnaphthalene, 1-n-propylnaphthalene, 1-i-propylnaphthalene, 1-n-butylnaphthalene, 1-sec-butylnaphthalene, 1-tert.
- the liquid lens liquid according to any one of [1] to [8] is provided as a second liquid and the conductive aqueous solution is provided as a first liquid, and the first translucent member and the second translucent member are provided.
- a light application member having a gap, a voltage application unit for applying a voltage to the first liquid and the second liquid contained in the gap, and applying a voltage by the voltage application unit Accordingly, the liquid lens that deforms the interface formed by the first liquid and the second liquid to refract the light incident from the first transparent member and emits the light from the second transparent member.
- a liquid containing an alkylnaphthalene has insulating properties and hydrophobicity, has a high visible light transmittance, has a low viscosity at room temperature, and can be used as a liquid for a liquid lens. Since the liquid containing alkylnaphthalene has hydrophobicity, it forms an interface with the conductive aqueous solution, and the interface can be deformed by applying a voltage to refract incident light. Further, since the transmittance is high, incident light can be efficiently emitted. Furthermore, since the viscosity is low, the refractive index can be easily changed by applying a voltage when used as a liquid lens.
- the liquid lens liquid of the present invention is used together with the first conductive aqueous solution (hereinafter also referred to as the first liquid) as the second liquid lens liquid (hereinafter also referred to as the second liquid).
- first liquid the first conductive aqueous solution
- second liquid lens liquid hereinafter also referred to as the second liquid.
- the liquid lens liquid of the present invention is used for a liquid lens 1 as shown in FIG.
- the first translucent member 4 and the second translucent member 7 are arranged with a gap.
- the 1st liquid 2 which is the electroconductive aqueous solution included in the gap
- the first liquid 2 and the second liquid 3 usually have a refractive index difference.
- the first electrode 5 and the second electrode are used as voltage application units for applying a voltage to the first liquid 2 and the second liquid 3. 8 is provided.
- the first electrode 5 and the second electrode 8 are connected to an external power source 11. Further, in order to prevent short-circuiting between the electrodes 5 and 8, the first electrode 5 and the second electrode 8 are provided with insulating portions 6 and 9, respectively.
- the second liquid 3 of the present invention Since the second liquid 3 of the present invention has hydrophobicity, it forms an interface in a state separated from the first liquid 2.
- the first liquid By applying a voltage by the voltage application unit, the first liquid is attracted to the electrode and deformed, and thus the interface formed by the first liquid and the second liquid can also be deformed. If it does in this way, the light which injected from the 1st transparent member can be refracted
- the refractive index can be changed by changing the applied voltage.
- the alkyl group of the alkylnaphthalenes used as the second liquid of the liquid lens liquid of the present invention is preferably an alkyl group having 1 to 4 carbon atoms. When the number of carbon atoms in the alkyl group exceeds 5, the refractive index decreases, and it tends to be solid at the use temperature.
- Preferred alkyl groups include methyl, ethyl, n-propyl, i-propyl, n-butyl, sec-butyl, and tert-butyl.
- Preferred alkylnaphthalenes in the present invention include 1-methylnaphthalene, 1-ethylnaphthalene, 1-n-propylnaphthalene, 1-i-propylnaphthalene, 1-n-butylnaphthalene, 1-sec-butylnaphthalene, 1-tert -Butylnaphthalene, 2-methylnaphthalene, 2-ethylnaphthalene, 2-n-propylnaphthalene, 2-i-propylnaphthalene, 2-n-butylnaphthalene, 2-sec-butylnaphthalene, 2-tert-butylnaphthalene, Can be mentioned.
- the liquid of the present invention preferably has the following physical properties.
- the melting point is ⁇ 10 ° C. or lower, preferably ⁇ 25 ° C. or lower, more preferably ⁇ 40 ° C. or lower.
- the boiling point is 60 ° C. or higher, preferably 85 ° C. or higher.
- the melting point and boiling point refer to the melting point and boiling point of the mixture, respectively.
- the lens of the present invention Since the lens of the present invention has a structure in which the liquid is refracted using the interface between the first liquid and the second liquid, it is necessary to form a stable interface between the first liquid and the second liquid. For this reason, it is preferable that the liquid of this invention has hydrophobicity.
- the liquid of the present invention Since the liquid of the present invention is used as a part of a lens, it preferably has a sufficient transmittance with visible light. Specifically, the transmittance per 2 mm in visible light (400 nm to 700 nm) is 90% or more, more preferably 95% or more.
- the refractive index at d-line (589 nm) is preferably 1.6 to 1.8, and particularly preferably the refractive index is 1.6 to 1.7.
- the density of the second liquid is preferably close to that of the first conductive water, and the value of ⁇ (density difference between the two liquids) / ⁇ (density) is preferably 10 ⁇ 2 or less.
- the preferred density range of the second liquid is 1.0 to 1.2 g / cm 3 , more preferably 1.0 to 1.1 g / cm 3 .
- the viscosity of the liquid according to the present invention is preferably low, and specifically 10 cp or less.
- the liquid of the present invention is composed of alkyl naphthalenes, the intrinsic transmittance in visible light is high, but it may be colored by a trace amount of impurities, and it is preferable to purify by an appropriate method.
- the purification method include soaking in an adsorbent such as silica gel, alumina, zeolite, activated carbon, or passing through a packed column of these adsorbents, precision distillation, and the like.
- the liquid of the present invention contains alkylnaphthalene as a main component, but may be mixed with other components for the purpose of adjusting various physical properties such as refractive index, density, transmittance, melting point, boiling point and the like.
- other components include, but are not limited to, naphthalene derivatives, anthracene derivatives, saturated hydrocarbon compounds, organic halogen compounds, organic sulfurated products, and silicon oil.
- the refractive index at d line (589 nm) at 25 ° C., the density at 25 ° C., the separability from water (25 ° C. and 40 ° C.), and the transmittance per 2 mm at 400 to 700 nm were evaluated.
- the refractive index at the d-line (589 nm) was measured using an Abbe refractometer.
- the density at 25 ° C. was measured using a pycnometer. Separation from water is carried out by shaking and mixing 5 g of water and 5 g of liquid in a screw tube, and then allowing to stand, and visually observing the interface between water and liquid, and when a clear interface is observed, The case where it was not so was regarded as bad.
- the transmittance is measured with a UV-visible spectrophotometer (VSCO 7100 made by JASCO) using a 2 mm cell for the UV spectrum at 400 to 700 nm. A case where there was a wavelength was regarded as defective.
- Example 1 Commercially available 1-methylnaphthalene was purified by a silica gel column, and the refractive index, density, separability from water (25 ° C., 40 ° C.), transmittance per 2 mm of light having a wavelength of 400 nm to 700 nm, and melting point were measured as described above. It was evaluated with.
- Example 2 Commercially available 1-methylnaphthalene 90 g / 2-ethylnaphthalene 10 g mixture was purified by silica gel column, refractive index, density, separability from water (25 ° C., 40 ° C.), transmittance per 2 mm at 400 nm to 700 nm, melting point was evaluated by the method described above.
- Comparative Examples 1 to 5 had poor transmittance, but Examples 1 to 6 of the present invention had good transmittance and good separability from water.
- It can be suitably used as a small liquid lens having an autofocus function or an autofocus function mounted on a camera-equipped mobile phone or the like and a liquid for the liquid lens.
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Abstract
A second liquid for a liquid for liquid lenses which is used in combination with a conductive aqueous solution serving as a first liquid and which separates from the first liquid to form an interface. The liquid for liquid lenses contains an alkylnaphthalene compound. The alkylnaphthalate compound to be used as the second liquid for the liquid for liquid lenses preferably has a C1-4 alkyl group as the alkyl group. When the naphthalene compound has an alkyl group having more than five carbon atoms, it has a reduced refractive index and is solid at use temperatures. The alkyl group preferably is methyl, ethyl, n-propyl, i-propyl, n-butyl, sec-butyl, or tert-butyl.
Description
本発明は自動焦点調節機能またはオートフォーカス機能等を有する液体レンズ及び液体レンズ用液体に関する。
The present invention relates to a liquid lens having an autofocus function or an autofocus function, and a liquid for a liquid lens.
近年のカメラ付携帯電話の普及により、より小型で高解像度等の高性能を有するカメラが望まれている。また、内蔵するカメラでオートフォーカス機能や光学ズーム機能を実現することが望まれている。しかしながら、従来の固体レンズを複数個使用する技術では、これらの機能を実現するためにはレンズの位置を光軸に沿って動かす必要があり、カメラモジュールが閉める実装空間が大きくなりすぎるという問題があった。これに対し、より小型でこれらの機能を実現する技術として液体レンズを用いた技術が注目されている（例えば、特許文献１～２、非特許文献１～２）。
With the recent spread of camera-equipped mobile phones, cameras with higher performance such as smaller size and higher resolution are desired. Also, it is desired to realize an autofocus function and an optical zoom function with a built-in camera. However, in the technology using a plurality of conventional solid lenses, in order to realize these functions, it is necessary to move the position of the lens along the optical axis, and there is a problem that the mounting space for closing the camera module becomes too large. there were. On the other hand, a technique using a liquid lens has attracted attention as a technique for realizing these functions with a smaller size (for example, Patent Documents 1 and 2, Non-Patent Documents 1 and 2).
本技術は２種類の液体の界面形状を電圧により制御することによりレンズを動かさずにオートフォーカス機能を実現する技術である。また、２つの液体レンズ（ズーム用液体レンズ、オートフォーカス用液体レンズ）および固体レンズを使用することにより光学ズームも可能となる。
This technology is a technology that realizes an autofocus function without moving the lens by controlling the interface shape of two types of liquids with voltage. Optical zooming is also possible by using two liquid lenses (zoom liquid lens, autofocus liquid lens) and a solid lens.
液体レンズでは電圧により液体の界面を制御する技術、２種類の液体の密度を同等に保つことおよび液滴の形状を安定に保つことが重要である。２種類の液体のうち第１液体としては、電圧による液体の界面の制御を容易にするため導電性水溶液が用いられ、例えば具体的には硫酸ナトリウム水溶液を用いた例が知られている。一方、第２液体の具体的特性としては、導電性水との分離性の観点から疎水性を有すること、界面を変形させるときの印加電圧を下げるために水より十分に高屈折率を有すること、重力の影響によるコマ収差を低減するために水と密度が極めて近いこと、可視光での透過率が高いこと、使用温度で低粘度の液体であること、絶縁性を有することなどが求められており、これらの性質を同時に満たす必要がある。第２液体としては１－ブロモデカンおよびクロロナフタレン、ブロモナフタレン、シリコンオイルなどの液体が知られているが、これらの液体はこれらの性質を同時に満たすものではない。
In the liquid lens, it is important to control the interface of the liquid by voltage, to keep the density of the two kinds of liquids equal, and to keep the droplet shape stable. Of the two types of liquids, as the first liquid, a conductive aqueous solution is used to facilitate the control of the liquid interface by voltage. For example, an example using a sodium sulfate aqueous solution is specifically known. On the other hand, specific properties of the second liquid include hydrophobicity from the viewpoint of separability from conductive water, and a sufficiently higher refractive index than water in order to lower the applied voltage when deforming the interface. In order to reduce coma due to the influence of gravity, water and density are extremely close, visible light transmittance is high, liquid is low viscosity at operating temperature, and insulation is required. It is necessary to satisfy these properties at the same time. As the second liquid, liquids such as 1-bromodecane and chloronaphthalene, bromonaphthalene, and silicone oil are known, but these liquids do not satisfy these properties at the same time.
本発明の課題は、第１液体である導電性水溶液とともに用いられ、上記特性を備えた液体レンズ用液体の第２液体を提供することにある。
An object of the present invention is to provide a second liquid of a liquid for a liquid lens that is used together with a conductive aqueous solution that is a first liquid and has the above characteristics.
発明者らは、本課題に対して鋭意検討した結果、ナフタレン誘導体を含有する組成物が上記特性を満たすことを見出し発明を完成するに至った。すなわち、本発明によれば、以下の液体レンズ用液体及び液体レンズが提供される。
As a result of intensive studies on this problem, the inventors have found that a composition containing a naphthalene derivative satisfies the above characteristics, and have completed the invention. That is, according to the present invention, the following liquid for liquid lens and liquid lens are provided.
［１］ アルキルナフタレン類を含有する液体レンズ用液体。
[1] A liquid lens liquid containing alkylnaphthalenes.
［２］ 導電性水溶液とともに用いられ、疎水性を有して前記導電性水溶液と分離して界面を形成する前記［１］に記載の液体レンズ用液体。
[2] The liquid for a liquid lens according to [1], which is used together with a conductive aqueous solution, has a hydrophobic property and separates from the conductive aqueous solution to form an interface.
［３］ 前記アルキルナフタレン類は、炭素数１～４のアルキル基を有する前記［１］または［２］に記載の液体レンズ用液体。
[3] The liquid for liquid lens according to [1] or [2], wherein the alkylnaphthalene has an alkyl group having 1 to 4 carbon atoms.
［４］ 前記アルキル基は、メチル基、エチル基、ｎ－プロピル基、ｉ―プロピル基、ｎ－ブチル基、ｓｅｃ－ブチル基、及びｔｅｒｔ－ブチル基のいずれかである前記［３］に記載の液体レンズ用液体。
[4] The alkyl group is any one of a methyl group, an ethyl group, an n-propyl group, an i-propyl group, an n-butyl group, a sec-butyl group, and a tert-butyl group. Liquid for liquid lenses.
［５］ 前記アルキルナフタレン類は、１－メチルナフタレン、１－エチルナフタレン、１－ｎ－プロピルナフタレン、１－ｉ－プロピルナフタレン、１－ｎ－ブチルナフタレン、１－ｓｅｃ－ブチルナフタレン、１－ｔｅｒｔ－ブチルナフタレン、２－メチルナフタレン、２－エチルナフタレン、２－ｎ－プロピルナフタレン、２－ｉ－プロピルナフタレン、２－ｎ－ブチルナフタレン、２－ｓｅｃ－ブチルナフタレン、及び２－ｔｅｒｔ－ブチルナフタレンのいずれかを含む前記［１］～［４］のいずれかに記載の液体レンズ用液体。
[5] The alkylnaphthalenes are 1-methylnaphthalene, 1-ethylnaphthalene, 1-n-propylnaphthalene, 1-i-propylnaphthalene, 1-n-butylnaphthalene, 1-sec-butylnaphthalene, 1-tert. -Butylnaphthalene, 2-methylnaphthalene, 2-ethylnaphthalene, 2-n-propylnaphthalene, 2-i-propylnaphthalene, 2-n-butylnaphthalene, 2-sec-butylnaphthalene, and 2-tert-butylnaphthalene The liquid for liquid lenses according to any one of the above [1] to [4], including any of them.
［６］ ２５℃における密度が１．０～１．１ｇ／ｃｍ３であり、５８９ｎｍの波長の光の２５℃の屈折率が１．６以上である前記［１］～［５］のいずれかに記載の液体レンズ用液体。
[6] Any of [1] to [5] above, wherein the density at 25 ° C. is 1.0 to 1.1 g / cm 3 , and the refractive index at 25 ° C. of light having a wavelength of 589 nm is 1.6 or more. Liquid for liquid lenses described in 1.
［７］ 波長が４００～７００ｎｍである光の２ｍｍあたりの透過率が９０％以上である前記［６］に記載の液体レンズ用液体。
[7] The liquid for a liquid lens according to [6], wherein the transmittance per 2 mm of light having a wavelength of 400 to 700 nm is 90% or more.
［８］ 融点が－１０℃以下である前記［６］に記載の液体レンズ用液体。
[8] The liquid for a liquid lens according to [6], which has a melting point of −10 ° C. or lower.
［９］ 前記［１］～［８］のいずれかに記載の液体レンズ用液体を第２液体、前記導電性水溶液を第１液体として内部に有し、第１透光性部材と第２透光性部材とが間隙を有して配置され、その間隙に内包された前記第１液体及び前記第２液体に電圧を印加する電圧印加部を有し、その電圧印加部によって電圧を印加することにより、前記第１液体及び前記第２液体によって形成される界面を変形させて、前記第１透過性部材から入射した光を屈折させて前記第２透過性部材から放出する液体レンズ。
[9] The liquid lens liquid according to any one of [1] to [8] is provided as a second liquid and the conductive aqueous solution is provided as a first liquid, and the first translucent member and the second translucent member are provided. A light application member having a gap, a voltage application unit for applying a voltage to the first liquid and the second liquid contained in the gap, and applying a voltage by the voltage application unit Accordingly, the liquid lens that deforms the interface formed by the first liquid and the second liquid to refract the light incident from the first transparent member and emits the light from the second transparent member.
アルキルナフタレン類を含有する液体は、絶縁性、疎水性を有し、可視光における透過率が高く、常温において低粘度であり、液体レンズ用液体として利用することができる。アルキルナフタレン類を含有する液体は、疎水性を有するため、導電性水溶液と界面を形成し、電圧を印加することによって界面を変形させて、入射した光を屈折させることができる。また透過率が高いため、入射した光を効率よく放出することができる。さらに、低粘度であるため、液体レンズとして用いた場合に電圧の印加により容易に屈折率を変化させることができる。
A liquid containing an alkylnaphthalene has insulating properties and hydrophobicity, has a high visible light transmittance, has a low viscosity at room temperature, and can be used as a liquid for a liquid lens. Since the liquid containing alkylnaphthalene has hydrophobicity, it forms an interface with the conductive aqueous solution, and the interface can be deformed by applying a voltage to refract incident light. Further, since the transmittance is high, incident light can be efficiently emitted. Furthermore, since the viscosity is low, the refractive index can be easily changed by applying a voltage when used as a liquid lens.
１：液体レンズ、２：第１液体、３：第２液体、４：第１透光性部材、５：第１電極、６：絶縁部、７：第２透光性部材、８：第２電極、９：絶縁部、１１：電源。
1: liquid lens, 2: first liquid, 3: second liquid, 4: first translucent member, 5: first electrode, 6: insulating portion, 7: second translucent member, 8: second Electrode, 9: insulation part, 11: power supply.
以下、図面を参照しつつ本発明の実施の形態について説明する。本発明は、以下の実施形態に限定されるものではなく、発明の範囲を逸脱しない限りにおいて、変更、修正、改良を加え得るものである。
Hereinafter, embodiments of the present invention will be described with reference to the drawings. The present invention is not limited to the following embodiments, and changes, modifications, and improvements can be added without departing from the scope of the invention.
本発明の液体レンズ用液体は、第２の液体用レンズ用液体（以下、第２液体ともいう）として、第１の導電性水溶液（以下、第１液体ともいう）ともに用いられるものであり、アルキルナフタレン単独または複数のアルキルナフタレン類の混合物を含有する。
The liquid lens liquid of the present invention is used together with the first conductive aqueous solution (hereinafter also referred to as the first liquid) as the second liquid lens liquid (hereinafter also referred to as the second liquid). Contains alkyl naphthalene alone or a mixture of a plurality of alkyl naphthalenes.
本発明の液体レンズ用液体は、図１に示すような液体レンズ１に用いられるものである。液体レンズ１は、第１透光性部材４と第２透光性部材７とが間隙を有して配置されている。そして、その間隙に内包された導電性水溶液である第１液体２と、本発明のアルキルナフタレン類を有する第２液体３が内包されている。第１液体２と第２液体３とは通常屈折率差を有している。
The liquid lens liquid of the present invention is used for a liquid lens 1 as shown in FIG. In the liquid lens 1, the first translucent member 4 and the second translucent member 7 are arranged with a gap. And the 1st liquid 2 which is the electroconductive aqueous solution included in the gap | interval and the 2nd liquid 3 which has the alkylnaphthalene of this invention are included. The first liquid 2 and the second liquid 3 usually have a refractive index difference.
第１透光性部材４と第２透光性部材７間には、第１液体２と、第２液体３とに電圧を印加するための電圧印加部として、第１電極５、第２電極８が設けられている。第１電極５、第２電極８は、外部の電源１１に接続される。また、電極間５，８がショートすることを防止するために、第１電極５及び第２電極８は、それぞれ絶縁部６，９が設けられている。
Between the first translucent member 4 and the second translucent member 7, the first electrode 5 and the second electrode are used as voltage application units for applying a voltage to the first liquid 2 and the second liquid 3. 8 is provided. The first electrode 5 and the second electrode 8 are connected to an external power source 11. Further, in order to prevent short-circuiting between the electrodes 5 and 8, the first electrode 5 and the second electrode 8 are provided with insulating portions 6 and 9, respectively.
本発明の第２液体３は、疎水性を有するため、第１液体２と分離した状態で界面を形成している。電圧印加部によって電圧を印加することにより、第１液体が、電極に引き寄せられて変形し、そのため第１液体及び第２液体によって形成される界面も変形させることができる。このようにすると、第１透過性部材から入射した光を屈折させて第２透過性部材から放出することができる。印加する電圧を変化させることにより、屈折率を変化させることが可能である。
Since the second liquid 3 of the present invention has hydrophobicity, it forms an interface in a state separated from the first liquid 2. By applying a voltage by the voltage application unit, the first liquid is attracted to the electrode and deformed, and thus the interface formed by the first liquid and the second liquid can also be deformed. If it does in this way, the light which injected from the 1st transparent member can be refracted | emitted, and it can discharge | release from a 2nd transparent member. The refractive index can be changed by changing the applied voltage.
本発明の液体レンズ用液体の第２液体として用いられるアルキルナフタレン類のアルキル基としては、炭素数１～４のアルキル基が好ましい。アルキル基の炭素数が５を超えると屈折率が低下し、また使用温度下で固体になる傾向がある。好ましいアルキル基としてはメチル基、エチル基、ｎ－プロピル基、ｉ―プロピル基、ｎ－ブチル基、ｓｅｃ－ブチル基、ｔｅｒｔ－ブチル基が挙げられる。
The alkyl group of the alkylnaphthalenes used as the second liquid of the liquid lens liquid of the present invention is preferably an alkyl group having 1 to 4 carbon atoms. When the number of carbon atoms in the alkyl group exceeds 5, the refractive index decreases, and it tends to be solid at the use temperature. Preferred alkyl groups include methyl, ethyl, n-propyl, i-propyl, n-butyl, sec-butyl, and tert-butyl.
本発明における好ましいアルキルナフタレンとしては、１－メチルナフタレン、１－エチルナフタレン、１－ｎ－プロピルナフタレン、１－ｉ－プロピルナフタレン、１－ｎ－ブチルナフタレン、１－ｓｅｃ－ブチルナフタレン、１－ｔｅｒｔ－ブチルナフタレン、２－メチルナフタレン、２－エチルナフタレン、２－ｎ－プロピルナフタレン、２－ｉ－プロピルナフタレン、２－ｎ－ブチルナフタレン、２－ｓｅｃ－ブチルナフタレン、２－ｔｅｒｔ－ブチルナフタレン、が挙げられる。また、液体が複数のアルキルナフタレン類の混合物からなる場合、いずれか一つのアルキルナフタレンは液体である必要がある。また、本発明の液体は以下のような諸物性を有することが好ましい。
Preferred alkylnaphthalenes in the present invention include 1-methylnaphthalene, 1-ethylnaphthalene, 1-n-propylnaphthalene, 1-i-propylnaphthalene, 1-n-butylnaphthalene, 1-sec-butylnaphthalene, 1-tert -Butylnaphthalene, 2-methylnaphthalene, 2-ethylnaphthalene, 2-n-propylnaphthalene, 2-i-propylnaphthalene, 2-n-butylnaphthalene, 2-sec-butylnaphthalene, 2-tert-butylnaphthalene, Can be mentioned. Further, when the liquid is composed of a mixture of a plurality of alkyl naphthalenes, any one of the alkyl naphthalene needs to be a liquid. Further, the liquid of the present invention preferably has the following physical properties.
（融点、沸点）
本発明の液体はカメラ使用温度において液体である必要があるため融点は－１０℃以下、好ましくは－２５℃以下、さらに好ましくは－４０℃以下である。また、沸点は６０℃以上、好ましくは８５℃以上である。なお、混合物の場合には、上記融点および沸点はそれぞれ当該混合物の融点および沸点を指す。 (Melting point, boiling point)
Since the liquid of the present invention needs to be a liquid at the camera operating temperature, the melting point is −10 ° C. or lower, preferably −25 ° C. or lower, more preferably −40 ° C. or lower. The boiling point is 60 ° C. or higher, preferably 85 ° C. or higher. In the case of a mixture, the melting point and boiling point refer to the melting point and boiling point of the mixture, respectively.
本発明の液体はカメラ使用温度において液体である必要があるため融点は－１０℃以下、好ましくは－２５℃以下、さらに好ましくは－４０℃以下である。また、沸点は６０℃以上、好ましくは８５℃以上である。なお、混合物の場合には、上記融点および沸点はそれぞれ当該混合物の融点および沸点を指す。 (Melting point, boiling point)
Since the liquid of the present invention needs to be a liquid at the camera operating temperature, the melting point is −10 ° C. or lower, preferably −25 ° C. or lower, more preferably −40 ° C. or lower. The boiling point is 60 ° C. or higher, preferably 85 ° C. or higher. In the case of a mixture, the melting point and boiling point refer to the melting point and boiling point of the mixture, respectively.
（疎水性）
本発明のレンズは第１液体と第２液体の界面を用いて液体を屈折させる構造を有するため、第１液体と第２液体間に安定な界面を形成する必要がある。このため本発明の液体は疎水性を有することが好ましい。 (Hydrophobic)
Since the lens of the present invention has a structure in which the liquid is refracted using the interface between the first liquid and the second liquid, it is necessary to form a stable interface between the first liquid and the second liquid. For this reason, it is preferable that the liquid of this invention has hydrophobicity.
本発明のレンズは第１液体と第２液体の界面を用いて液体を屈折させる構造を有するため、第１液体と第２液体間に安定な界面を形成する必要がある。このため本発明の液体は疎水性を有することが好ましい。 (Hydrophobic)
Since the lens of the present invention has a structure in which the liquid is refracted using the interface between the first liquid and the second liquid, it is necessary to form a stable interface between the first liquid and the second liquid. For this reason, it is preferable that the liquid of this invention has hydrophobicity.
（透過率）
本発明の液体はレンズの一部として使用するものであるから可視光で十分な透過率を有することが好ましい。具体的には、可視光（４００ｎｍ～７００ｎｍ）における２ｍｍあたりの透過率は９０％以上、更に好ましくは９５％以上である。 (Transmittance)
Since the liquid of the present invention is used as a part of a lens, it preferably has a sufficient transmittance with visible light. Specifically, the transmittance per 2 mm in visible light (400 nm to 700 nm) is 90% or more, more preferably 95% or more.
本発明の液体はレンズの一部として使用するものであるから可視光で十分な透過率を有することが好ましい。具体的には、可視光（４００ｎｍ～７００ｎｍ）における２ｍｍあたりの透過率は９０％以上、更に好ましくは９５％以上である。 (Transmittance)
Since the liquid of the present invention is used as a part of a lens, it preferably has a sufficient transmittance with visible light. Specifically, the transmittance per 2 mm in visible light (400 nm to 700 nm) is 90% or more, more preferably 95% or more.
（屈折率）
また、界面変形に要する印加電圧を下げるために可視光で高屈折率を有することが好ましい。具体的にはｄ線（５８９ｎｍ）における屈折率が１．６～１．８であることが好ましく、特に好ましくは屈折率が１．６～１．７である。 (Refractive index)
Moreover, in order to lower the applied voltage required for interface deformation, it is preferable to have a high refractive index with visible light. Specifically, the refractive index at d-line (589 nm) is preferably 1.6 to 1.8, and particularly preferably the refractive index is 1.6 to 1.7.
また、界面変形に要する印加電圧を下げるために可視光で高屈折率を有することが好ましい。具体的にはｄ線（５８９ｎｍ）における屈折率が１．６～１．８であることが好ましく、特に好ましくは屈折率が１．６～１．７である。 (Refractive index)
Moreover, in order to lower the applied voltage required for interface deformation, it is preferable to have a high refractive index with visible light. Specifically, the refractive index at d-line (589 nm) is preferably 1.6 to 1.8, and particularly preferably the refractive index is 1.6 to 1.7.
（密度）
また、第１液体である導電性水溶液の密度と第２液体の密度が異なる場合、重力の影響で両液体の界面の形状が変化してしまう。例えば第２液体の密度が第１液体の密度を上回った場合、界面形状はＳ字型になりこま収差が生じてしまう。したがって第２液体の密度は第１の導電性水に近い密度であることが好ましく、Δρ（２つの液体の密度差）／ρ（密度）の値が１０－２以下になることが好ましい。第２液体の好ましい密度の範囲は１．０～１．２ｇ／ｃｍ3、更に好ましくは１．０～１．１ｇ／ｃｍ3である。 (density)
Further, when the density of the conductive aqueous solution that is the first liquid is different from the density of the second liquid, the shape of the interface between the two liquids changes due to the influence of gravity. For example, when the density of the second liquid exceeds the density of the first liquid, the interface shape becomes S-shaped, and aberrations occur. Therefore, the density of the second liquid is preferably close to that of the first conductive water, and the value of Δρ (density difference between the two liquids) / ρ (density) is preferably 10 −2 or less. The preferred density range of the second liquid is 1.0 to 1.2 g / cm 3 , more preferably 1.0 to 1.1 g / cm 3 .
また、第１液体である導電性水溶液の密度と第２液体の密度が異なる場合、重力の影響で両液体の界面の形状が変化してしまう。例えば第２液体の密度が第１液体の密度を上回った場合、界面形状はＳ字型になりこま収差が生じてしまう。したがって第２液体の密度は第１の導電性水に近い密度であることが好ましく、Δρ（２つの液体の密度差）／ρ（密度）の値が１０－２以下になることが好ましい。第２液体の好ましい密度の範囲は１．０～１．２ｇ／ｃｍ3、更に好ましくは１．０～１．１ｇ／ｃｍ3である。 (density)
Further, when the density of the conductive aqueous solution that is the first liquid is different from the density of the second liquid, the shape of the interface between the two liquids changes due to the influence of gravity. For example, when the density of the second liquid exceeds the density of the first liquid, the interface shape becomes S-shaped, and aberrations occur. Therefore, the density of the second liquid is preferably close to that of the first conductive water, and the value of Δρ (density difference between the two liquids) / ρ (density) is preferably 10 −2 or less. The preferred density range of the second liquid is 1.0 to 1.2 g / cm 3 , more preferably 1.0 to 1.1 g / cm 3 .
（粘度）
また、本発明のレンズ界面が電圧の印加により迅速に形状変化する必要があることから、本発明の液体の粘度は低粘度であることが好ましく、具体的には１０ｃｐ以下であることが好ましい。 (viscosity)
In addition, since it is necessary to rapidly change the shape of the lens interface according to the present invention by applying a voltage, the viscosity of the liquid according to the present invention is preferably low, and specifically 10 cp or less.
また、本発明のレンズ界面が電圧の印加により迅速に形状変化する必要があることから、本発明の液体の粘度は低粘度であることが好ましく、具体的には１０ｃｐ以下であることが好ましい。 (viscosity)
In addition, since it is necessary to rapidly change the shape of the lens interface according to the present invention by applying a voltage, the viscosity of the liquid according to the present invention is preferably low, and specifically 10 cp or less.
（精製）
本発明の液体はアルキルナフタレン類からなるので、可視光における本質的な透過率は高いが、微量不純物により着色する場合があり、適当な方法で精製することが好ましい。精製法としては、シリカゲル、アルミナ、ゼオライト、活性炭等の吸着剤に浸漬するかあるいはこれらの吸着剤の充填カラムを通過させる方法、精密蒸留等が挙げられる。 (Purification)
Since the liquid of the present invention is composed of alkyl naphthalenes, the intrinsic transmittance in visible light is high, but it may be colored by a trace amount of impurities, and it is preferable to purify by an appropriate method. Examples of the purification method include soaking in an adsorbent such as silica gel, alumina, zeolite, activated carbon, or passing through a packed column of these adsorbents, precision distillation, and the like.
本発明の液体はアルキルナフタレン類からなるので、可視光における本質的な透過率は高いが、微量不純物により着色する場合があり、適当な方法で精製することが好ましい。精製法としては、シリカゲル、アルミナ、ゼオライト、活性炭等の吸着剤に浸漬するかあるいはこれらの吸着剤の充填カラムを通過させる方法、精密蒸留等が挙げられる。 (Purification)
Since the liquid of the present invention is composed of alkyl naphthalenes, the intrinsic transmittance in visible light is high, but it may be colored by a trace amount of impurities, and it is preferable to purify by an appropriate method. Examples of the purification method include soaking in an adsorbent such as silica gel, alumina, zeolite, activated carbon, or passing through a packed column of these adsorbents, precision distillation, and the like.
（その他の成分）
本発明の液体はアルキルナフタレンを主成分とするが、屈折率、密度、透過率、融点、沸点等の諸物性値を調節する目的でその他の成分と混合しても良い。その他の成分としてはナフタレン誘導体、アントラセン誘導体、飽和炭化水素化合物類、有機ハロゲン化合物、有機硫黄化物、シリコンオイルなどが挙げられるがこれらに限るものではない。 (Other ingredients)
The liquid of the present invention contains alkylnaphthalene as a main component, but may be mixed with other components for the purpose of adjusting various physical properties such as refractive index, density, transmittance, melting point, boiling point and the like. Examples of other components include, but are not limited to, naphthalene derivatives, anthracene derivatives, saturated hydrocarbon compounds, organic halogen compounds, organic sulfurated products, and silicon oil.
本発明の液体はアルキルナフタレンを主成分とするが、屈折率、密度、透過率、融点、沸点等の諸物性値を調節する目的でその他の成分と混合しても良い。その他の成分としてはナフタレン誘導体、アントラセン誘導体、飽和炭化水素化合物類、有機ハロゲン化合物、有機硫黄化物、シリコンオイルなどが挙げられるがこれらに限るものではない。 (Other ingredients)
The liquid of the present invention contains alkylnaphthalene as a main component, but may be mixed with other components for the purpose of adjusting various physical properties such as refractive index, density, transmittance, melting point, boiling point and the like. Examples of other components include, but are not limited to, naphthalene derivatives, anthracene derivatives, saturated hydrocarbon compounds, organic halogen compounds, organic sulfurated products, and silicon oil.
以下、本発明を実施例に基づいてさらに詳細に説明するが、本発明はこれらの実施例に限定されるものではない。
Hereinafter, the present invention will be described in more detail based on examples, but the present invention is not limited to these examples.
２５℃におけるｄ線（５８９ｎｍ）における屈折率、２５℃における密度、水との分離性（２５℃，４０℃）、４００～７００ｎｍにおける２ｍｍあたりの透過率を評価した。本実施例においてｄ線（５８９ｎｍ）における屈折率はアッベの屈折率計を用いて測定した。２５℃における密度はピクノメーターを用いて測定した。水との分離性は水５ｇと液体５ｇをスクリュー管内で振り混ぜ混合させた後静置し、目視で水と液体の界面を観察することにより行い、明確な界面が観察された場合を良好、そうでない場合を不良とした。透過率は紫外可視分光光度計（ＪＡＳＣＯ製 Ｖ７１００）により４００～７００ｎｍにおけるＵＶスペクトルを２ｍｍセルを用いて測定し、本範囲において透過率が９０％を下回る波長がない場合を良好、９０％を下回る波長がある場合を不良とした。
The refractive index at d line (589 nm) at 25 ° C., the density at 25 ° C., the separability from water (25 ° C. and 40 ° C.), and the transmittance per 2 mm at 400 to 700 nm were evaluated. In this example, the refractive index at the d-line (589 nm) was measured using an Abbe refractometer. The density at 25 ° C. was measured using a pycnometer. Separation from water is carried out by shaking and mixing 5 g of water and 5 g of liquid in a screw tube, and then allowing to stand, and visually observing the interface between water and liquid, and when a clear interface is observed, The case where it was not so was regarded as bad. The transmittance is measured with a UV-visible spectrophotometer (VSCO 7100 made by JASCO) using a 2 mm cell for the UV spectrum at 400 to 700 nm. A case where there was a wavelength was regarded as defective.
（実施例１）
市販の１－メチルナフタレンをシリカゲルカラムにより精製し、屈折率、密度、水との分離性（２５℃，４０℃）、波長が４００ｎｍ～７００ｎｍの光の２ｍｍあたりの透過率、融点を上記の方法で評価した。 Example 1
Commercially available 1-methylnaphthalene was purified by a silica gel column, and the refractive index, density, separability from water (25 ° C., 40 ° C.), transmittance per 2 mm of light having a wavelength of 400 nm to 700 nm, and melting point were measured as described above. It was evaluated with.
市販の１－メチルナフタレンをシリカゲルカラムにより精製し、屈折率、密度、水との分離性（２５℃，４０℃）、波長が４００ｎｍ～７００ｎｍの光の２ｍｍあたりの透過率、融点を上記の方法で評価した。 Example 1
Commercially available 1-methylnaphthalene was purified by a silica gel column, and the refractive index, density, separability from water (25 ° C., 40 ° C.), transmittance per 2 mm of light having a wavelength of 400 nm to 700 nm, and melting point were measured as described above. It was evaluated with.
（実施例２）
市販の１－メチルナフタレン９０ｇ／２－エチルナフタレン１０ｇ混合物をシリカゲルカラムにより精製し、屈折率、密度、水との分離性（２５℃，４０℃）、４００ｎｍ～７００ｎｍにおける２ｍｍあたりの透過率、融点を上記の方法で評価した。 (Example 2)
Commercially available 1-methylnaphthalene 90 g / 2-ethylnaphthalene 10 g mixture was purified by silica gel column, refractive index, density, separability from water (25 ° C., 40 ° C.), transmittance per 2 mm at 400 nm to 700 nm, melting point Was evaluated by the method described above.
市販の１－メチルナフタレン９０ｇ／２－エチルナフタレン１０ｇ混合物をシリカゲルカラムにより精製し、屈折率、密度、水との分離性（２５℃，４０℃）、４００ｎｍ～７００ｎｍにおける２ｍｍあたりの透過率、融点を上記の方法で評価した。 (Example 2)
Commercially available 1-methylnaphthalene 90 g / 2-ethylnaphthalene 10 g mixture was purified by silica gel column, refractive index, density, separability from water (25 ° C., 40 ° C.), transmittance per 2 mm at 400 nm to 700 nm, melting point Was evaluated by the method described above.
（比較例１）
１－ブロモデカンについて同様の評価を行った。 (Comparative Example 1)
A similar evaluation was performed for 1-bromodecane.
１－ブロモデカンについて同様の評価を行った。 (Comparative Example 1)
A similar evaluation was performed for 1-bromodecane.
（比較例２）
ブロモナフタレンについて同様の評価を行った。 (Comparative Example 2)
Similar evaluation was performed for bromonaphthalene.
ブロモナフタレンについて同様の評価を行った。 (Comparative Example 2)
Similar evaluation was performed for bromonaphthalene.
（実施例３～６）
市販の１－メチルナフタレン、２－メチルナフタレン、１－エチルナフタレン、２－エチルナフタレンをそれぞれ減圧蒸留により精製した。融点、密度、屈折率測定を行い、表２に記載した。２－メチルナフタレンは融点が３４℃の常温で固体のため、１－メチルナフタレン／２－メチルナフタレン／１－エチルナフタレン＝４／２／４（質量比）の混合物として評価した。参考としてＡｌｄｒｉｃｈ社カタログ記載の沸点も記載した。 (Examples 3 to 6)
Commercially available 1-methylnaphthalene, 2-methylnaphthalene, 1-ethylnaphthalene and 2-ethylnaphthalene were each purified by distillation under reduced pressure. The melting point, density and refractive index were measured and listed in Table 2. Since 2-methylnaphthalene was solid at room temperature with a melting point of 34 ° C., it was evaluated as a mixture of 1-methylnaphthalene / 2-methylnaphthalene / 1-ethylnaphthalene = 4/2/4 (mass ratio). For reference, the boiling point described in the catalog of Aldrich was also shown.
市販の１－メチルナフタレン、２－メチルナフタレン、１－エチルナフタレン、２－エチルナフタレンをそれぞれ減圧蒸留により精製した。融点、密度、屈折率測定を行い、表２に記載した。２－メチルナフタレンは融点が３４℃の常温で固体のため、１－メチルナフタレン／２－メチルナフタレン／１－エチルナフタレン＝４／２／４（質量比）の混合物として評価した。参考としてＡｌｄｒｉｃｈ社カタログ記載の沸点も記載した。 (Examples 3 to 6)
Commercially available 1-methylnaphthalene, 2-methylnaphthalene, 1-ethylnaphthalene and 2-ethylnaphthalene were each purified by distillation under reduced pressure. The melting point, density and refractive index were measured and listed in Table 2. Since 2-methylnaphthalene was solid at room temperature with a melting point of 34 ° C., it was evaluated as a mixture of 1-methylnaphthalene / 2-methylnaphthalene / 1-ethylnaphthalene = 4/2/4 (mass ratio). For reference, the boiling point described in the catalog of Aldrich was also shown.
（比較例３～５）
市販の１－ブロモナフタレン、２－ブロモナフタレン、１－ブロモデカンを単蒸留により精製した。融点、密度、屈折率測定を行い、表２に記載した。また、参考としてＡｌｄｒｉｃｈ社カタログ記載の沸点も記載した。 (Comparative Examples 3 to 5)
Commercially available 1-bromonaphthalene, 2-bromonaphthalene and 1-bromodecane were purified by simple distillation. The melting point, density and refractive index were measured and listed in Table 2. For reference, the boiling point described in the Aldrich catalog is also shown.
市販の１－ブロモナフタレン、２－ブロモナフタレン、１－ブロモデカンを単蒸留により精製した。融点、密度、屈折率測定を行い、表２に記載した。また、参考としてＡｌｄｒｉｃｈ社カタログ記載の沸点も記載した。 (Comparative Examples 3 to 5)
Commercially available 1-bromonaphthalene, 2-bromonaphthalene and 1-bromodecane were purified by simple distillation. The melting point, density and refractive index were measured and listed in Table 2. For reference, the boiling point described in the Aldrich catalog is also shown.
比較例１～５は、透過率が不良であったが、本発明の実施例１～６は、透過率が良好であり、水との分離性も良好であった。
Comparative Examples 1 to 5 had poor transmittance, but Examples 1 to 6 of the present invention had good transmittance and good separability from water.
カメラ付携帯電話等に搭載される自動焦点調節機能またはオートフォーカス機能を有する小型液体レンズ及びその液体レンズ用液体として好適に利用することができる。
It can be suitably used as a small liquid lens having an autofocus function or an autofocus function mounted on a camera-equipped mobile phone or the like and a liquid for the liquid lens.
Claims (9)
- アルキルナフタレン類を含有する液体レンズ用液体。 Liquid lens liquid containing alkyl naphthalenes.
- 導電性水溶液とともに用いられ、疎水性を有して前記導電性水溶液と分離して界面を形成する請求項１に記載の液体レンズ用液体。 The liquid for a liquid lens according to claim 1, which is used together with a conductive aqueous solution, has a hydrophobic property and separates from the conductive aqueous solution to form an interface.
- 前記アルキルナフタレン類は、炭素数１～４のアルキル基を有する請求項１または２に記載の液体レンズ用液体。 The liquid for liquid lenses according to claim 1 or 2, wherein the alkylnaphthalenes have an alkyl group having 1 to 4 carbon atoms.
- 前記アルキル基は、メチル基、エチル基、ｎ－プロピル基、ｉ―プロピル基、ｎ－ブチル基、ｓｅｃ－ブチル基、及びｔｅｒｔ－ブチル基のいずれかである請求項３に記載の液体レンズ用液体。 4. The liquid lens according to claim 3, wherein the alkyl group is any one of a methyl group, an ethyl group, an n-propyl group, an i-propyl group, an n-butyl group, a sec-butyl group, and a tert-butyl group. liquid.
- 前記アルキルナフタレン類は、１－メチルナフタレン、１－エチルナフタレン、１－ｎ－プロピルナフタレン、１－ｉ－プロピルナフタレン、１－ｎ－ブチルナフタレン、１－ｓｅｃ－ブチルナフタレン、１－ｔｅｒｔ－ブチルナフタレン、２－メチルナフタレン、２－エチルナフタレン、２－ｎ－プロピルナフタレン、２－ｉ－プロピルナフタレン、２－ｎ－ブチルナフタレン、２－ｓｅｃ－ブチルナフタレン、及び２－ｔｅｒｔ－ブチルナフタレンのいずれかを含む請求項１～４のいずれか１項に記載の液体レンズ用液体。 The alkylnaphthalenes include 1-methylnaphthalene, 1-ethylnaphthalene, 1-n-propylnaphthalene, 1-i-propylnaphthalene, 1-n-butylnaphthalene, 1-sec-butylnaphthalene, 1-tert-butylnaphthalene. , 2-methylnaphthalene, 2-ethylnaphthalene, 2-n-propylnaphthalene, 2-i-propylnaphthalene, 2-n-butylnaphthalene, 2-sec-butylnaphthalene, and 2-tert-butylnaphthalene. The liquid for a liquid lens according to any one of claims 1 to 4, further comprising:
- ２５℃における密度が１．０～１．１ｇ／ｃｍ３であり、５８９ｎｍの波長の光の２５℃の屈折率が１．６以上である請求項１～５のいずれか１項に記載の液体レンズ用液体。 6. The liquid according to claim 1, wherein the density at 25 ° C. is 1.0 to 1.1 g / cm 3 , and the refractive index at 25 ° C. of light having a wavelength of 589 nm is 1.6 or more. Lens liquid.
- 波長が４００～７００ｎｍである光の２ｍｍあたりの透過率が９０％以上である請求項６に記載の液体レンズ用液体。 The liquid for a liquid lens according to claim 6, wherein the transmittance per 2 mm of light having a wavelength of 400 to 700 nm is 90% or more.
- 融点が－１０℃以下である請求項６に記載の液体レンズ用液体。 The liquid for a liquid lens according to claim 6, having a melting point of -10 ° C or lower.
- 請求項１～８のいずれか１項に記載の液体レンズ用液体を第２液体、前記導電性水溶液を第１液体として内部に有し、
第１透光性部材と第２透光性部材とが間隙を有して配置され、その間隙に内包された前記第１液体及び前記第２液体に電圧を印加する電圧印加部を有し、
その電圧印加部によって電圧を印加することにより、前記第１液体及び前記第２液体によって形成される界面を変形させて、前記第１透過性部材から入射した光を屈折させて前記第２透過性部材から放出する液体レンズ。 The liquid lens liquid according to any one of claims 1 to 8 is contained as a second liquid and the conductive aqueous solution as a first liquid.
A first light-transmitting member and a second light-transmitting member are disposed with a gap, and have a voltage applying unit that applies a voltage to the first liquid and the second liquid contained in the gap,
By applying a voltage by the voltage application unit, the interface formed by the first liquid and the second liquid is deformed, and light incident from the first transmissive member is refracted to cause the second transmissive property. A liquid lens released from a member.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2008/063881 WO2010013347A1 (en) | 2008-08-01 | 2008-08-01 | Liquid for liquid lens and liquid lens |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2008/063881 WO2010013347A1 (en) | 2008-08-01 | 2008-08-01 | Liquid for liquid lens and liquid lens |
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| WO2010013347A1 true WO2010013347A1 (en) | 2010-02-04 |
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| PCT/JP2008/063881 WO2010013347A1 (en) | 2008-08-01 | 2008-08-01 | Liquid for liquid lens and liquid lens |
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| WO (1) | WO2010013347A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019183336A1 (en) * | 2018-03-22 | 2019-09-26 | Corning Incorporated | Naphtyl based high index hydrophobic liquids and transmission recovery agents for liquid lens formulations |
| CN115038993A (en) * | 2019-12-20 | 2022-09-09 | 奥普托图尼消费品股份公司 | Liquid lens with fixed lens shaping element and movable transparent window |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5569126A (en) * | 1978-11-17 | 1980-05-24 | Matsushita Electric Ind Co Ltd | Light control unit |
| JPH0651107A (en) * | 1992-08-03 | 1994-02-25 | Enplas Corp | Production of liquid lens |
| JP2006525544A (en) * | 2003-05-06 | 2006-11-09 | コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ | Electrowetting module |
| JP2007219521A (en) * | 2006-02-15 | 2007-08-30 | Samsung Electro Mech Co Ltd | Insulating solution for liquid lens with high reliability and liquid lens using the same |
| JP2008191313A (en) * | 2007-02-02 | 2008-08-21 | Jsr Corp | Liquid for liquid lens, and liquid lens |
-
2008
- 2008-08-01 WO PCT/JP2008/063881 patent/WO2010013347A1/en active Application Filing
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5569126A (en) * | 1978-11-17 | 1980-05-24 | Matsushita Electric Ind Co Ltd | Light control unit |
| JPH0651107A (en) * | 1992-08-03 | 1994-02-25 | Enplas Corp | Production of liquid lens |
| JP2006525544A (en) * | 2003-05-06 | 2006-11-09 | コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ | Electrowetting module |
| JP2007219521A (en) * | 2006-02-15 | 2007-08-30 | Samsung Electro Mech Co Ltd | Insulating solution for liquid lens with high reliability and liquid lens using the same |
| JP2008191313A (en) * | 2007-02-02 | 2008-08-21 | Jsr Corp | Liquid for liquid lens, and liquid lens |
Non-Patent Citations (1)
| Title |
|---|
| KOHASHI T. ET AL.: "Electroosmotic Display Device", IEEE TRANSACTION ON ELECTRON DEVICES, vol. 38, no. 9, 1991, pages 2064 - 2069 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019183336A1 (en) * | 2018-03-22 | 2019-09-26 | Corning Incorporated | Naphtyl based high index hydrophobic liquids and transmission recovery agents for liquid lens formulations |
| US10558031B2 (en) | 2018-03-22 | 2020-02-11 | Corning Incorporated | Naphtyl based high index hydrophobic liquids and transmission recovery agents for liquid lens formulations |
| CN111902738A (en) * | 2018-03-22 | 2020-11-06 | 康宁股份有限公司 | Naphthyl-based high refractive index hydrophobic liquids and transmittance restoration agents for liquid lens formulations |
| US11204492B2 (en) | 2018-03-22 | 2021-12-21 | Corning Incorporated | Naphtyl based high index hydrophobic liquids and transmission recovery agents for liquid lens formulations |
| CN115038993A (en) * | 2019-12-20 | 2022-09-09 | 奥普托图尼消费品股份公司 | Liquid lens with fixed lens shaping element and movable transparent window |
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