WO2006022346A1 - 光学素子 - Google Patents
光学素子 Download PDFInfo
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- WO2006022346A1 WO2006022346A1 PCT/JP2005/015464 JP2005015464W WO2006022346A1 WO 2006022346 A1 WO2006022346 A1 WO 2006022346A1 JP 2005015464 W JP2005015464 W JP 2005015464W WO 2006022346 A1 WO2006022346 A1 WO 2006022346A1
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- liquid crystal
- substrate
- optical
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Classifications
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/29—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the position or the direction of light beams, i.e. deflection
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1343—Electrodes
- G02F1/134309—Electrodes characterised by their geometrical arrangement
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/29—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the position or the direction of light beams, i.e. deflection
- G02F1/294—Variable focal length devices
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F2201/00—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00
- G02F2201/12—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00 electrode
Definitions
- the present invention can control the alignment of liquid crystal molecules by applying two kinds of voltages between an electrode provided on a substrate constituting a liquid crystal cell and an electrode provided externally,
- the present invention relates to an optical element that can be easily adjusted to the optical characteristics.
- Liquid crystals having fluidity like liquid and anisotropy in electro-optical characteristics can be controlled in various ways.
- thin and light flat plate display devices have been remarkably developed in recent years.
- the alignment state of the liquid crystal molecules can be easily controlled by the surface treatment of the glass substrate provided with the two transparent conductive films constituting the liquid crystal element and the externally applied voltage.
- this type of liquid crystal device has excellent characteristics unlike other optical materials that the effective refractive index can be continuously varied from a value for almost extraordinary light to a value for ordinary light by applying a voltage.
- RU effective refractive index
- Patent Document 4 characteristics are improved by forming a network polymer network in the liquid crystal.
- a lens using such a liquid crystal has many microlenses. It is relatively easy to make a microlens array in which the so-called lenses are two-dimensionally arranged in a flat plate shape.
- an optical image obtained from an optical system having an aberration correction mechanism in the imaging optical system is detected by an imaging device, and a signal for correcting the detected signal force aberration and aberration is obtained.
- an optical device that corrects aberrations of an optical system caused by fluctuations of the optical system and obtains an optical image without distortion an optical device that uses a liquid crystal element instead of a lens mirror has been proposed (Patent Document 5).
- a lens using a liquid crystal optical element an elliptical refractive index distribution characteristic, that is, an electric field controlled anamorphic liquid crystal lens has been proposed (Non-patent Document 8).
- these optical elements using liquid crystals are designed to variably control the effective refractive index of liquid crystal as a medium by applying a voltage between electrodes.
- a lens that can adjust optical characteristics such as the focal length and aberrations of the optical system is realized.
- a polymer lens can be obtained by polymerizing and curing after adjusting the focal length using a polymerized curable liquid crystal as a liquid crystal material (Patent Document 6).
- Patent Document 1 Japanese Patent Laid-Open No. 54-151854
- Patent Document 2 JP-A-11-109303
- Patent Document 3 JP-A-11-109304
- Patent Document 4 Japanese Patent Laid-Open No. 10-239676
- Patent Document 5 Japanese Patent Laid-Open No. 03-265819
- Patent Document 6 Japanese Patent Laid-Open No. 09-005695
- Non-Patent Document 1 S. Sato, ⁇ Liquid-crystal lens -cell with variable focal length '', Japanese Journal of Applied Physics, 1979, Vol. 18, P.1679-1683
- Non-Patent Document 2 Susumu Sato, “Liquid Layer and its Applications”, Sangyo Tosho Co., Ltd., October 14, 1984, P. 204-206
- Non-Patent Document 3 Toshiaki Nose and Susumu Sato (T-Nose and S. Sato), "Liquid-crystal micro lens obtained with a non uniform electric field", Liquid Crystals, 1994 April 15, 1947, 1433
- Non-Patent Literature 4 Susumu Sato, “The World of Liquid Crystal”, Sangyo Tosho Co., Ltd., April 15, 1994, P.18 6-189
- Non-Patent Document 5 Michi Honma, Toshiaki Nose, Susumu Sato (M. Honma, T. Nose and S. Sato), “Enhancement of numerical aperture of liquid crystal” microlenses using a stacked electrode structure)], Japanese J ofnal of Applied Physics, August 2000, Vol. 39, No. 8, P.4799— 4802
- Non-Patent Document 6 M. Ye and S. Sato, ⁇ Optical properties of liquid crystal lens of any size '', 49th Applied Physics Proceedings of Associate Union Lecture Meeting, March 2002, 28p— X— 10, P. 1277
- Non-Patent Document 7 M. Ye and S. Sato, ⁇ Optical properties of liquid crystal lens of any size '', Japanese Journal of Applied Physics, May 2002, Vol. 41, No.5, P ⁇ 571- L573
- Non-Patent Document 8 Yoshitaka Yokoyama, Shigeru Habe, Susumu Sato, "Electric field controlled anamorphic liquid crystal lens", 2004 Proceedings of the Japanese Liquid Crystal Society Annual Meeting 2004 September 26
- liquid crystal lens having a lens-shaped structure, a liquid crystal micro lens utilizing the spatial orientation distribution characteristics of liquid crystal molecules by an axially symmetric non-uniform electric field generated by a circular hole pattern electrode, and non-patent literature Outside the circular hole pattern electrode proposed in 5.
- an object of an embodiment of the present invention is to provide an optical element that can solve the above-described problems and can easily and quickly greatly change the optical characteristics while maintaining good optical characteristics. There is to do.
- Another object of the present invention is to provide an optical element capable of controlling movement of a focal position in three dimensions.
- Still another object of the present invention is to provide an optical characteristic in which the optical characteristic can be controlled by a deviation characteristic of a convex lens and a concave lens.
- the present invention basically includes a first substrate having a first electrode, a second substrate, and a hole disposed outside the second substrate. And a liquid crystal layer in which liquid crystal molecules accommodated between the first substrate and the second substrate are aligned in one direction, the first electrode and the second electrode In an optical element that operates by applying a first voltage between the first electrode and the liquid crystal molecules to control alignment, a third electrode is disposed outside the second electrode via an insulating layer, Basically, the optical characteristics can be controlled by applying a second voltage independent of the first voltage to the third electrode.
- the focal length that accompanies the operation of mechanically moving the lens back and forth as in the prior art can be greatly varied by electrical control.
- FIG. 1A is an explanatory diagram showing a configuration of an optical element according to an embodiment of the present invention as viewed from a cross section.
- FIG. 1B is a configuration explanatory view showing one embodiment of an optical element according to the present invention as seen from a plane.
- FIG. 2 is an explanatory view showing an example of the potential distribution of the element in order to explain the function of the optical element according to the present invention.
- FIG. 3A is an explanatory view showing a first example in which the potential distribution of the element is changed in order to explain the function of the optical element according to the present invention.
- FIG. 3B is an explanatory view showing a second example in which the potential distribution of the element is changed in order to explain the function of the optical element according to the present invention.
- FIG. 4 shows the optical element in order to explain the function of the optical element according to the present invention.
- FIG. 5 is an explanatory diagram showing a state in which the phase of a light wave changes as viewed in the direction of the optical axis.
- FIG. 5 is an explanatory view showing a state in which the phase of the light wave passing through the optical element changes in order to explain the function of the optical element according to the present invention.
- FIG. 6 is an explanatory diagram showing how the focal distance with respect to the control voltage changes in order to explain the function of the optical element according to the present invention.
- FIG. 7 is a structural explanatory view showing another embodiment of the optical element according to the present invention.
- FIG. 8A is a structural explanatory view showing still another embodiment of the optical element according to the present invention as seen from the cross section.
- FIG. 8B is a structural explanatory view showing still another embodiment of the optical element according to the present invention as viewed from above.
- FIG. 9A is a structural explanatory view showing still another embodiment of the optical element according to the present invention, also in view of the cross-sectional force.
- FIG. 9B is a configuration explanatory view showing still another embodiment of the optical element according to the present invention as seen from the plane.
- FIG. 10A is an explanatory diagram shown for explaining a specific configuration example of the control unit shown in FIG.
- FIG. 10B is an explanatory diagram shown to explain the transition of the focal position of the liquid crystal lens of the control unit shown in FIG.
- FIG. 11 is an explanatory diagram showing an example in which the potential applied to the divided electrodes in FIG. 10 and the movement state of the focal position in the X direction are measured.
- FIG. 12 is an explanatory diagram showing an example in which the potential applied to the divided electrodes in FIG. 10 and the state of movement of the focal position in the y direction are measured.
- FIG. 13 is an explanatory diagram showing an example in which the potential applied to the divided electrode in FIG. 10 and the movement state of the focal position in a direction having an angle with respect to the x and y directions are measured.
- FIG. 14A is a configuration explanatory view showing still another embodiment of the optical element according to the present invention as seen from a cross section.
- FIG. 14B is a configuration explanatory view showing still another embodiment of the optical element according to the present invention, in view of plane force.
- FIG. 15 is an explanatory view showing an example of the potential distribution of the element in order to explain the function of the optical element of FIGS. 14A and 14B.
- FIG. 16A is an explanatory view showing a first example in which the potential distribution of the element is changed to explain the function of the optical element of FIGS. 14A and 14B.
- FIG. 16B is an explanatory view showing a second example in which the potential distribution of the element is changed to explain the function of the optical element of FIGS. 14A and 14B.
- FIG. 17 is an explanatory view showing a state in which the phase of the light wave passing through the optical element changes in order to explain the function of the optical element in FIG.
- FIG. 18 is an explanatory diagram showing how the focal length changes with respect to the control voltage in order to explain the function of the optical element of FIG.
- FIG. 19 is a structural explanatory view showing still another embodiment of the optical element according to the present invention.
- reference numeral 111 denotes a first substrate (transparent glass), and a first electrode 21 (ITO material as a material) is formed on the inner surface side.
- a second substrate (transparent glass) 112 is disposed on the first electrode 21 side so as to face each other in parallel.
- a second electrode 22 (A1 as a material) is formed on the outside of the second substrate 112.
- the second electrode 22 has a round hole 222 (for example, a diameter of 4.5 mm).
- a liquid crystal layer 311 (for example, a thickness of 130 / zm) in which liquid crystal molecules are aligned in one direction is formed between the first substrate 21 side of the first substrate 111 and the second substrate 112.
- Has been. 41 and 42 are spacers for obtaining the liquid crystal layer 311.
- a third electrode 23 (made of an ITO material) is formed on the upper surface of the second electrode 22 via an insulating layer 113 (eg, 70 m thin glass).
- a protective layer (glass) 114 is disposed on the upper surface of the third electrode 23.
- the surfaces of the first and second substrates that sandwich the liquid crystal layer are coated with polyimide. It is also rubbed in the X axis direction.
- the first electrode 21 and the second electrode A first voltage Vo is stored between the electrode 22 and the electrode 22.
- the second voltage Vc is initially set to 0 volts, and Vo is set to an optimum value.
- This voltage Vo is supplied from the voltage supply unit 51.
- a voltage value is set so as to obtain the best optical characteristic (this characteristic will be referred to as the first stage optical characteristic).
- the second voltage Vc is applied between the first electrode 21 and the third electrode 23 independently of the first voltage Vo.
- the second voltage Vc is supplied from the voltage supply unit 52.
- the optical characteristic of the lens (referred to as the second stage optical characteristic) can be controlled.
- Vo and Vc are set to have the same frequency and phase.
- the optical characteristics of the second stage are varied from a state where the focal length is very close to a state close to infinity (or infinite). For this reason, the variable range of the focal length becomes wide, which is practical and possible for various uses.
- z is the direction of the optical axis
- y is the direction orthogonal to the optical axis.
- z, y, and x are the same as in Figure 1.
- FIG. 3A and FIG. 3B show another potential distribution, that is, an example of the potential distribution of the liquid crystal layer.
- A, B, C, and D in FIG. 4 show the phase distribution of the light wave when the optical element of the present invention is viewed from the optical axis direction.
- Vo 70V
- Vc control voltage
- OV 20V
- 40V control voltage
- 60V 60V
- A—D shows It can be seen that the spacing between the interference fringes gradually increases as the spacing between the fringes is tight and the control voltage Vc is varied to OV, 20V, 40V, and 60V. As the interval between the interference fringes increases, the light refraction decreases and the focal length increases.
- FIG. 5 shows a state of light phase delay ⁇ in the liquid crystal lens in the above embodiment.
- the center force of the y-axis also shows a square distribution characteristic in which the phase lag gradually decreases toward the periphery.
- the control voltage (second voltage) Vc is increased, the phase difference force between the center and the surroundings becomes smaller.
- FIG. 6 shows the relationship between the change in the focal length of the optical element of the present invention and the previous control voltage Vc.
- the focal length can be varied by varying the control voltage Vc.
- An embodiment of the present invention is not limited to the above configuration.
- FIG. 7 shows another embodiment of the present invention.
- the configuration of the liquid crystal layer 311 is different.
- the liquid crystal layer 311 is divided by an insulating layer 312 (transparent glass) to be a first liquid crystal layer 31 la and a second liquid crystal layer 31 lb.
- the response speed becomes extremely fast.
- the response speed of the liquid crystal is inversely proportional to the square of the layer thickness. Therefore, when the liquid crystal layer 311 shown in FIG. 1 is divided into the first and second liquid crystal layers 311a and 311b, the control signal can be responded at a speed four times that of the element shown in FIG.
- the liquid crystal layer 311 has a two-layer structure
- the following advantages can be obtained. That is, if the rubbing directions in the liquid crystal layers 311a and 311b are the same, the alignment direction of the liquid crystals is also the same, and the lens has twice the power (magnification) as compared with the case where the liquid crystal layer has the same thickness. Obtainable. In other words, the same effect can be obtained as when two lenses are stacked, and it is effective for shortening the focal distance.
- the polarizing plate functions as an unnecessary liquid crystal element.
- FIG. 8A and FIG. 8B further show another embodiment of the present invention.
- This optical element is constructed by adding a similar element to the element shown in FIG. Yes. Therefore, the same reference numerals are given to the same parts (first element parts) as the elements in FIG.
- the second element portion is overlapped with the first element portion while sharing the second electrode 22 and the third electrode 23.
- the second element part consists of the substrate 111-2, 112-2, the electrode 21-2, the first and second liquid crystal layers 311a-1, 311b-2, the insulating layer 312-2, and the common second electrode 22 and the third electrode 23 is provided.
- a gap G is provided for the insulation between them.
- the second electrode 22 is provided with a cutout portion between the hole portion and the outer periphery, and a lead-out line 23a of the third electrode 23 is led through the cutout portion.
- a control voltage Vc is applied through this lead line 23a.
- each of the two vertically symmetrical liquid crystal layers shown in FIG. 7 can be made more multilayer, and in this case, further increase in lens power and improvement in response speed can be obtained.
- the drive signal operates as an N type at a high frequency (approximately several tens of kHz), and operates as a P type when the drive signal is at a low frequency (approximately 100 Hz).
- a dual frequency drive type liquid crystal material may be used. When such a material is used, the response speed of the alignment operation can be increased by switching the frequency.
- FIG. 9A and FIG. 9B further show another embodiment of the present invention.
- the second electrode 22 is a single sheet, and the voltage applied to this electrode is kept constant.
- the second electrode 22 is divided into a plurality of parts.
- the second electrode 22 is divided into four as shown in FIG. 9B.
- the voltage applied to each of the electrodes 22a to 22d can be variably controlled by the control unit 55.
- Other configurations are the same as those in the previous embodiment.
- FIG. 10A is a specific configuration example of the control unit 55
- FIG. 10B is an explanatory diagram showing movement positions of various focal points when the focal position is controlled by the control unit 55.
- the voltage applied to the electrode 22a is extracted from the slider of the variable resistor 55a, and a divided voltage between the voltage + V and the voltage -V is extracted.
- the voltage applied to the electrode 22b is taken out from the slider of the variable resistor 55b, and a divided voltage between the voltage + V and the voltage V is taken out.
- the voltage applied to electrode 22c is taken from the slider of variable resistance 55c.
- the divided voltage between the voltage + V and the voltage ⁇ V is taken out.
- the voltage applied to the electrode 22d is extracted from the slider of the variable resistor 55d, and the divided voltage between the voltage + V and the voltage V is extracted!
- the focal position can be moved in the X-axis direction or the y-axis direction, and further in both directions, as shown in FIG. 10 (B). It can also be moved in the z-axis direction. In other words, it is possible to control the movement of the focal position within a three-dimensional range.
- FIGS. 11A and 11B show measurement examples when Vc is adjusted and movement control is performed in the x-axis direction with the focal position held on the focal plane.
- a in Fig. 11 shows the case where the spatial position of the focal point is changed by varying the voltage applied to the second electrode 22, and B in Fig. 11 shows the focal point position in the corresponding focal plane. ing.
- FIGS. 12A and 12B show measurement examples when the focal position is controlled to move in the y-axis direction.
- a in FIG. 12 shows the case where the spatial position of the focal point is changed by varying the voltage applied to the second electrode 22, and B in FIG. 12 shows the moving distance of the focal point.
- FIGS. 13A and 13B show measurement examples when the focal position is controlled to move in both the X-axis and y-axis directions.
- a in FIG. 13 is a variable voltage applied to the second electrode 22, and B in FIG. 13 is a focal distance.
- the present invention is not limited to the embodiment described above.
- the liquid crystal lens functions as a convex lens.
- the liquid crystal lens can easily function as a concave lens.
- FIG. 14A and FIG. 14B show an embodiment in which the lens functions as a concave lens.
- a constant alternating voltage Vo is applied from the voltage supply unit 61 between the first electrode 21 and the third electrode 23.
- a voltage Vc is applied from the voltage supply unit 62 between the first electrode 21 and the second electrode 22.
- the voltage Vc can be variably controlled.
- Other configurations are the same as those of the above-described embodiment.
- z is the direction of the optical axis
- y is the direction orthogonal to the optical axis It is for the direction.
- z, y, and x are the same as in Figure 1. This potential distribution is opposite to that of the convex lens shown in FIG. 2, and it can be understood that it shows concave lens characteristics.
- FIG. 16A and FIG. 16B show another example of potential distribution.
- This change in potential distribution corresponds to the tilt angle of the liquid crystal molecules and also to the refraction angle of light.
- FIGS. 16A and 16B show a reverse characteristic as compared with the states of FIGS. 3A and 3B and function as a concave lens.
- FIG. 17 shows the state of the phase delay ⁇ of light in the liquid crystal lens in the above embodiment.
- the center force of the y-axis also shows a square distribution characteristic in which the phase lag gradually increases toward the periphery.
- the control voltage (second voltage) Vc is varied, the phase difference between the center and the periphery can be controlled.
- the concave lens characteristics can be varied.
- FIG. 18 shows the relationship between the change in the focal length of the optical element of the present invention and the control voltage Vc described above.
- the focal length can be varied by varying the control voltage Vc.
- FIG. 19 shows the embodiment shown in FIG. 1 (embodiment that realizes a convex lens function), the embodiment shown in FIG. 9 (the embodiment that can control the movement of the focal position in three dimensions), and FIG. 14A.
- FIG. 14B shows a multi-function lens in combination with the embodiment shown in FIG. By switching switches 64 and 65, the function of convex lens and concave lens can be switched. In the case of the convex lens function, the focal length can be moved in three dimensions by further finely adjusting the voltage applied to the second electrode segmentation independently. Even if the concave lens function is used, the potential of the divided electrodes may be controlled independently.
- the present invention is not limited to the above-described embodiments as they are, and can be embodied by modifying the constituent elements without departing from the scope of the invention when it is practiced.
- Various inventions can be formed by appropriately combining a plurality of constituent elements disclosed in the above embodiments. it can. For example, some components may be deleted from all the components shown in the embodiment. Furthermore, you may combine suitably the component covering different embodiment.
- the shape of the third electrode may be given as either a sinusoidal function, a superposition function of a sinusoidal function, or a power function.
- a configuration in which a plurality of forces having one liquid crystal lens are arranged may be used. It can also be a two-dimensional array such as a compound eye.
- the optical element of the present invention can be used for various purposes such as a magnifying lens and a lens for an imaging unit used as a visual function in a robot.
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Abstract
Description
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Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
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KR1020077004051A KR100854183B1 (ko) | 2004-08-26 | 2005-08-25 | 광학 소자 |
EP05774676.0A EP1783538B1 (en) | 2004-08-26 | 2005-08-25 | Optical element |
US11/678,794 US8194228B2 (en) | 2004-08-26 | 2007-02-26 | Liquid crystal lens in which a voltage imparts optimal first-stage optical properties to the liquid crystal lens by influencing a liquid crystal layer |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
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JP2004246860 | 2004-08-26 | ||
JP2004-246860 | 2004-08-26 | ||
JP2005052626A JP4057597B2 (ja) | 2004-08-26 | 2005-02-28 | 光学素子 |
JP2005-052626 | 2005-02-28 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US11/678,794 Continuation US8194228B2 (en) | 2004-08-26 | 2007-02-26 | Liquid crystal lens in which a voltage imparts optimal first-stage optical properties to the liquid crystal lens by influencing a liquid crystal layer |
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WO2006022346A1 true WO2006022346A1 (ja) | 2006-03-02 |
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PCT/JP2005/015464 WO2006022346A1 (ja) | 2004-08-26 | 2005-08-25 | 光学素子 |
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US (1) | US8194228B2 (ja) |
EP (1) | EP1783538B1 (ja) |
JP (1) | JP4057597B2 (ja) |
KR (1) | KR100854183B1 (ja) |
WO (1) | WO2006022346A1 (ja) |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2007017934A (ja) * | 2005-06-07 | 2007-01-25 | Konica Minolta Holdings Inc | 光学素子および光ピックアップ |
JP2010107686A (ja) * | 2008-10-30 | 2010-05-13 | Akita Prefecture | 液晶レンズの製造方法及び液晶レンズ |
WO2013114933A1 (ja) * | 2012-01-30 | 2013-08-08 | 日本電気硝子株式会社 | 液晶レンズ及び液晶レンズ用セル |
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Also Published As
Publication number | Publication date |
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JP2006091826A (ja) | 2006-04-06 |
KR100854183B1 (ko) | 2008-08-26 |
JP4057597B2 (ja) | 2008-03-05 |
US20070139333A1 (en) | 2007-06-21 |
EP1783538A1 (en) | 2007-05-09 |
US8194228B2 (en) | 2012-06-05 |
KR20070033043A (ko) | 2007-03-23 |
EP1783538A4 (en) | 2009-12-09 |
EP1783538B1 (en) | 2016-01-06 |
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