CN102866556A - Liquid crystal zoom lens and zoom control method thereof - Google Patents
Liquid crystal zoom lens and zoom control method thereof Download PDFInfo
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- CN102866556A CN102866556A CN2012103749893A CN201210374989A CN102866556A CN 102866556 A CN102866556 A CN 102866556A CN 2012103749893 A CN2012103749893 A CN 2012103749893A CN 201210374989 A CN201210374989 A CN 201210374989A CN 102866556 A CN102866556 A CN 102866556A
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Abstract
The present invention relates to optical lens field, a kind of liquid-crystal zoom lens and its Zoom control method are disclosed. There is circular ring shape diffraction electrode structure, the radius of circular ring type diffraction electrode meets on the electrode plate of liquid-crystal zoom lens
, wherein rj indicates that the radius of j-th of annulus, λ 0 are design wavelength, and F0 is focal length constant, and p is phase depth, and value is greater than 1; Optical path difference between adjacent cylindrical diffraction electrode structure corresponding region
Meet condition
, the refringence of wherein Δ nLC (V) is applied voltage value when being V adjacent area liquid crystal material, d is the thickness of liquid crystal layer. By changing the driving voltage of electric control gear output, the refringence of adjacent area liquid crystal material is controlled, to realize zoom. The present invention is based on the circular ring electrode structures that phase depth p is greater than 1, advantageously reduce the requirement on machining accuracy of electrode, improve the diffraction efficiency of lens; And zoom is directly realized by outputting drive voltage, and peripheral control circuits are simplified, it is easy to operate..
Description
Technical field
The present invention relates to the optical lens field, be specifically related to a kind of liquid-crystal zoom lens and Zoom control method thereof.
Background technology
Liquid-crystal zoom lens is widely used in the fields such as optical imagery, optical communication, machine vision, 3-D display.This zoom lens need not mechanical movement means and the parts such as Miniature mechanical pump, micro servo motor, and the interference of environment is insensitive to external world, have the advantages such as simple in structure, stable performance.
Liquid-crystal zoom lens utilizes the birefringenct property of liquid crystal material, changes the orientation of liquid crystal molecule by impressed voltage, thereby changes the refractive index of liquid crystal material, finally realizes zoom.Include two kinds of refractive liquid-crystal zoom lens and diffraction type liquid-crystal zoom lens.The refractive zoom lens utilize refraction principle to realize focusing on and zoom, such as Jap.P. JP52-32348 and JP61-4586, and United States Patent (USP) U.S.Patent4,190,330 and U.S.Patent4,037,929 etc., the common bore of these class lens is less, response speed is slow, transmittance is low.
The diffraction type liquid-crystal zoom lens is realized focusing on and zoom based on diffraction principle.Jap.P. JP60-50510 discloses a kind of diffraction type liquid-crystal zoom lens based on the continuous surface type Fresnel lens.United States Patent (USP) U.S.Patent4,904,063 have proposed the liquid-crystal zoom lens based on the continuous surface type fresnel lens structure of two kinds of optimizations.These class zoom lens exist that response speed is slow, difficulty of processing is large, are unfavorable for the problems such as liquid crystal molecule aligns.United States Patent (USP) U.S.Patent4,909,626, U.S. Patent application U.S.Patent Application2006/0164593A1 etc. discloses the liquid-crystal zoom lens based on plane Fresnel circular ring type electrode structure.This Structure Improvement aligning of liquid crystal molecule, the difficulty of kind electrode is large, cost is high but make, and the problem such as this lens arrangement peripheral control circuit is complicated, diffraction efficiency is low.
Summary of the invention
The objective of the invention is to overcome the deficiency that exists in the available liquid crystal zoom lens technology, provide a kind of diffraction efficiency high, control circuit is reliable, the liquid-crystal zoom lens that zoom operation is easy and Zoom control method thereof.
To achieve the above object of the invention, the technical solution used in the present invention provides a kind of liquid-crystal zoom lens, comprises liquid crystal cell, liquid crystal, electric control gear; Liquid crystal cell comprises the first battery lead plate, the second battery lead plate and is connected the first battery lead plate and the sept of the second battery lead plate, wherein have annular diffraction electrode structure at least one electrode plate, be coated with oriented layer for the liquid crystal molecule orientation at the inside surface of at least one battery lead plate; The radius of described circular ring type diffraction electrode satisfies:
R wherein
jThe radius that represents j annulus, λ
0Be design wavelength, F
0Be the focal length constant, p is phase depth, and value is greater than 1; Optical path difference l=Δ n between the adjacent annular diffraction electrode structural correspondence zone
LC(V) * d l 〉=2 λ that satisfy condition
O, Δ n wherein
LCThe refringence of adjacent area liquid crystal material when (V) being V for the impressed voltage value, d is the thickness of liquid crystal layer.
In the present invention:
Described electric control gear and the first battery lead plate be connected battery lead plate and be connected, for zoom lens provide driving voltage; Electric control gear changes described Δ n by outputting drive voltage
LC(V) parameter.
Described annular diffraction electrode structure is the planar transparent conductive structure.
Described annular diffraction electrode structure is coated with the phase place embossment structure of homogeneous transparent conductive layer for the surface.
Described annular diffraction electrode is positioned on the same plane of battery lead plate, or is positioned on the Different Plane of battery lead plate.
The present invention also provides a kind of Zoom control method of aforesaid liquid-crystal zoom lens, by changing the driving voltage of electric control gear output, the refractive indices n of control adjacent area liquid crystal material
LC(V), the focal length of liquid-crystal zoom lens satisfies
Wherein, F
0Be the focal length constant, p is phase depth, and m is the order of diffraction of lens, m=int[α
LCP], int[] be that rounding operation accords with α
LCThe phase place changed factor that causes for the variations in refractive index by liquid crystal,
L is the optical path difference between the adjacent annular diffraction electrode structural correspondence zone, l=Δ n
LC(V) * d, and l 〉=2 λ
O
In the present invention, described oriented layer is prior art, and its effect is that liquid crystal molecule is arranged by specific direction.Oriented layer is the skim macromolecule organic normally, and through friction treatment; Also can be by preparing with the vacuum evaporation silicon oxide film at a certain angle at glass surface.
Because the utilization of technique scheme, the present invention compared with prior art has following advantages:
1, the present invention is based on phase depth greater than 1 annular electrode structure, be conducive to reduce the requirement on machining accuracy of electrode, improve the diffraction efficiency of lens.
2, the lens of the present invention's design have been avoided the short circuit control between the electrode, directly realize zoom by outputting drive voltage, have simplified the peripheral control circuit, and are easy and simple to handle.
Description of drawings
Fig. 1 is the side diagrammatic cross-section of the liquid-crystal zoom lens that provides of the embodiment of the invention 1;
Fig. 2 is the schematic top plan view of the liquid-crystal zoom lens that provides of the embodiment of the invention 1;
Fig. 3 is the side diagrammatic cross-section of the liquid-crystal zoom lens that provides of the embodiment of the invention 2;
Wherein, 1, liquid crystal cell; 2, liquid crystal; 3, electric control gear; 4, the first battery lead plate; 5, the second battery lead plate; 6, sept; 7, annular diffraction electrode structure; 8, conductive layer; 9, oriented layer; 10, electrode gap; 11 electrode cables; 12, insulation course.
Embodiment
The invention will be further described below in conjunction with drawings and Examples.
Embodiment 1
Referring to attached Fig. 1 and 2, Fig. 1 be in the present embodiment by liquid crystal cell 1, liquid crystal 2, the side diagrammatic cross-section of the liquid-crystal zoom lens structure that electric control gear 3 consists of, the inside surface of a substrate of liquid crystal cell 1 has planar electrode structure.Fig. 2 is the schematic top plan view of liquid-crystal zoom lens structure in the present embodiment.
The liquid-crystal zoom lens of the present embodiment, comprise liquid crystal cell 1, liquid crystal 2, electric control gear 3, liquid crystal cell 1 comprises the first battery lead plate 4, the second battery lead plate 5, sept 6, liquid crystal 2 is filled in the space of liquid crystal cell 1 inside, electric control gear 3 connects the first battery lead plate 4 and the second battery lead plate 5 by electrode cable 11, has plane ring shaped diffraction electrode structure 7 on the inside surface of the first battery lead plate 4, separate with electrode gap 10 between the annular diffraction electrode structure, the second battery lead plate 5 inside surfaces are coated with conductive layer 8, cover one deck oriented layer 9 on the conductive layer of the second battery lead plate 5, be used for the orientation of liquid crystal molecule.
In the present embodiment, the radius of circular ring type electrode structure 7 satisfies:
R wherein
jThe radius that represents j round loop electrode, λ
0Be design wavelength, F
0Be the focal length constant, p is phase depth, and value is greater than 1.
Equal the thickness of described liquid crystal layer apart from d in the present embodiment between the first battery lead plate 4 and the second battery lead plate 5, satisfy d 〉=2 λ
O/ abs (n
e-n
o), n wherein
e, n
oRepresent respectively extraordinary ray and ordinary refraction index that liquid crystal material is corresponding.Optical path difference l=Δ n between the adjacent annular diffraction electrode structural correspondence zone
LC(V) * d l 〉=2 λ that satisfy condition
O, Δ n wherein
LC(V) be the refringence of impressed voltage value adjacent area liquid crystal material when being V, d is the thickness of liquid crystal layer.
F (α
LC)
λ OBe the focal length of humorous diffraction type liquid-crystal zoom lens, its Changing Pattern satisfies:
M=int[α
LCP], int[wherein] the expression rounding operation; M is the order of diffraction of lens; α
LCThe phase place changed factor that expression is caused by the variations in refractive index of liquid crystal, value is
The present embodiment designs the zoom lens of following parameter:
The bore of zoom lens is 2mm, focal length constant F
0=30mm, design wavelength lambda
0=632.8, phase depth p=3, the refractive index n of liquid crystal material
e=1.77, n
o=1.52, thickness of liquid crystal layer d=8 μ m, according to the focal length variations rule:
M=int[α
LCP], α
LCThe phase place changed factor that expression is caused by the variations in refractive index of liquid crystal, value is
L is the optical path difference between the adjacent annular diffraction electrode structural correspondence zone, l=Δ n
LC(V) * d l 〉=2 λ that satisfy condition
O, Δ n
LC(V) be the refringence of impressed voltage value adjacent area liquid crystal material when being V, d is the thickness of liquid crystal layer.
In the present embodiment, thereby electric control gear 3 applies different variation of refractive index generation that different voltages cause liquid crystal material between the adjacent area by electrode cable 11 at adjacent annular electrode, thereby changes the refringence of material between the adjacent area.The change in optical path length that the refringence of material causes between the adjacent electrode zone reaches a design wavelength lambda
0The time, the focal length of lens namely changes.In the present embodiment, if the m value is: m=3, m=2, m=1, m=0, corresponding focal length then is: F
1=F
0F
2=3F
0/ 2; F
3=3F
0F
4=∞.Designed lens by regulating impressed voltage so that in the lens refractive index of liquid crystal material change, thereby cause that corresponding variation occurs parameter m, finally realizes zoom.The focal length of designed lens can be at F
1, F
2, F
3, F
4Mutually switch between four focal lengths, realize zoom.
The size of the electrode gap 10 between the electrode structure of circular ring type described in the present embodiment is guaranteeing to realize higher diffraction efficiency between the electrode in the mutually insulated preferably less than 1 micron.
Embodiment 2
Referring to accompanying drawing 3, it is the side diagrammatic cross-section of the liquid-crystal zoom lens that provides of the present embodiment, liquid crystal cell 1 comprises the first battery lead plate 4, the second battery lead plate 5, sept 6, liquid crystal 2 is filled in the space of liquid crystal cell 1 inside, electric control gear 3 connects the first battery lead plate 4 and the second battery lead plate 5 by electrode cable 11, has plane ring shaped diffraction electrode structure 7 on the inside surface of the first battery lead plate 4, the adjacent electrode of annular diffraction electrode structure 7 lays respectively on two planes of battery lead plate 4, be coupled to each other by insulation course 12 between two planes at adjacent electrode place, be in the edge fine registration of two adjacent electrodes on the Different Plane.The second battery lead plate 5 inside surfaces are coated with and cover one deck oriented layer 9 on the conductive layer of conductive layer 8, the second battery lead plates 5, are used for the orientation of liquid crystal molecule.
In the present embodiment, the circular ring type electrode structure, its radius satisfies:
R wherein
jThe radius that represents j annulus, λ
0Be design wavelength, F
0Be the focal length constant, p is phase depth, and value is greater than 1.
Equal the thickness of described liquid crystal layer apart from d between the first battery lead plate 4 and the second battery lead plate 5, satisfy d 〉=2 λ
O/ abs (n
e-n
o), n wherein
e, n
oRepresent respectively extraordinary ray and ordinary refraction index that liquid crystal material is corresponding.
The present embodiment designs the zoom lens of following parameter: the bore of zoom lens is 4mm, focal length constant F
0=40mm, design wavelength lambda
0=514.5, phase depth p=2, the refractive index n of liquid crystal material
e=1.77, n
o=1.52, thickness of liquid crystal layer d=12 μ m, according to the focal length variations rule:
M=int[α
LCP], α
LCThe phase place changed factor that expression is caused by the variations in refractive index of liquid crystal, value is
L is the optical path difference between the adjacent annular diffraction electrode structural correspondence zone, l=Δ n
LC(V) * d l 〉=2 λ that satisfy condition
O, Δ n
LC(V) be the refringence of impressed voltage value adjacent area liquid crystal material when being V, d is the thickness of liquid crystal layer.
In the present embodiment, thereby electric control gear 3 applies different variation of refractive index generation that different voltages cause liquid crystal material between the adjacent area by electrode cable 11 at adjacent annular electrode, thereby changes the refringence of material between the adjacent area.The change in optical path length that the refringence of material causes between the adjacent electrode zone in the present embodiment reaches a design wavelength lambda
0The time, the focal length of lens namely changes.But the m value is: m=5, m=4, m=3, m=2, m=1, m=0, but corresponding focal length value F
1=2F
0/ 5; F
2=F
0/ 2; F
3=2F
0/ 3; F
4=F
0, F
5=2F
0, F
6=∞.Designed lens by regulating impressed voltage so that in the lens refractive index of liquid crystal material change, thereby cause that corresponding variation occurs parameter m, finally realizes zoom.The focal length of designed lens can be at F
1, F
2, F
3, F
4, F
5, F
6Mutually switch between six focal lengths, realize zoom.
Claims (6)
1. a liquid-crystal zoom lens comprises liquid crystal cell, liquid crystal, electric control gear; Liquid crystal cell comprises the first battery lead plate, the second battery lead plate and is connected the first battery lead plate and the sept of the second battery lead plate, wherein have annular diffraction electrode structure at least one electrode plate, be coated with oriented layer for the liquid crystal molecule orientation at the inside surface of at least one battery lead plate; It is characterized in that, the radius of described circular ring type diffraction electrode satisfies:
R wherein
jThe radius that represents j annulus, λ
0Be design wavelength, F
0Be the focal length constant, p is phase depth, and value is greater than 1; Optical path difference l=Δ n between the adjacent annular diffraction electrode structural correspondence zone
LC(V) * d l 〉=2 λ that satisfy condition
O, Δ n wherein
LCThe refringence of adjacent area liquid crystal material when (V) being V for the impressed voltage value, d is the thickness of liquid crystal layer.
2. a kind of liquid-crystal zoom lens according to claim 1 is characterized in that, described electric control gear and the first battery lead plate be connected battery lead plate and be connected, for zoom lens provide driving voltage; Electric control gear changes described Δ n by outputting drive voltage
LC(V) parameter.
3. a kind of liquid-crystal zoom lens according to claim 1 is characterized in that, described annular diffraction electrode structure is the planar transparent conductive structure.
4. a kind of liquid-crystal zoom lens according to claim 1 is characterized in that, described annular diffraction electrode structure is coated with the phase place embossment structure of homogeneous transparent conductive layer for the surface.
5. a kind of liquid-crystal zoom lens according to claim 1 is characterized in that, described annular diffraction electrode is positioned on the same plane of battery lead plate, or is positioned on the Different Plane of battery lead plate.
6. the Zoom control method of a liquid-crystal zoom lens as claimed in claim 1 is characterized in that: change the driving voltage of electric control gear output, the refractive indices n of control adjacent area liquid crystal material
LC(V), the focal length of liquid-crystal zoom lens satisfies
Wherein, F
0Be the focal length constant, p is phase depth, and m is the order of diffraction of lens, m=int[α
LCP], int[] be that rounding operation accords with α
LCThe phase place changed factor that causes for the variations in refractive index by liquid crystal,
L is the optical path difference between the adjacent annular diffraction electrode structural correspondence zone, l=Δ n
LC(V) * d, and l 〉=2 λ
O
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| CN2012103749893A CN102866556A (en) | 2012-09-29 | 2012-09-29 | Liquid crystal zoom lens and zoom control method thereof |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105572926A (en) * | 2016-01-12 | 2016-05-11 | 洪煦 | Virtual reality device based on controllable liquid crystal lens and adjusting method of virtual reality device |
| CN106444176A (en) * | 2016-10-31 | 2017-02-22 | 宁波视睿迪光电有限公司 | Liquid crystal lens array and three-dimensional display device |
| CN106896546A (en) * | 2017-03-10 | 2017-06-27 | 上海交通大学 | A kind of method for improving nematic liquid crystal optical modulation device diffraction efficiency |
| CN107195764A (en) * | 2017-06-27 | 2017-09-22 | 常州瑞丰特科技有限公司 | dodging device and preparation method thereof |
| CN107688243A (en) * | 2017-10-20 | 2018-02-13 | 上海天马微电子有限公司 | A kind of display device |
| CN108388025A (en) * | 2018-03-09 | 2018-08-10 | 京东方科技集团股份有限公司 | Eyeglass and preparation method thereof, glasses and optical system |
| CN109791317A (en) * | 2016-07-22 | 2019-05-21 | 国立大学法人大阪大学 | Liquid crystal cell, deflecting element and glasses |
| CN110579167A (en) * | 2018-06-08 | 2019-12-17 | 河北工程大学 | Digital image recording experiment system and method |
| CN111562690A (en) * | 2019-02-13 | 2020-08-21 | 源奇科技股份有限公司 | Adjustable light projector |
| CN113093432A (en) * | 2021-04-22 | 2021-07-09 | 厦门天马微电子有限公司 | Display panel and display device |
| CN113514974A (en) * | 2021-04-19 | 2021-10-19 | 南昌虚拟现实研究院股份有限公司 | Liquid crystal lens zooming processing method and system |
| CN117539083A (en) * | 2024-01-08 | 2024-02-09 | 南昌虚拟现实研究院股份有限公司 | Variable-focus liquid crystal lens |
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Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105572926A (en) * | 2016-01-12 | 2016-05-11 | 洪煦 | Virtual reality device based on controllable liquid crystal lens and adjusting method of virtual reality device |
| CN109791317A (en) * | 2016-07-22 | 2019-05-21 | 国立大学法人大阪大学 | Liquid crystal cell, deflecting element and glasses |
| CN109791317B (en) * | 2016-07-22 | 2022-04-19 | 国立大学法人大阪大学 | Liquid crystal element, deflection element and spectacles |
| CN106444176A (en) * | 2016-10-31 | 2017-02-22 | 宁波视睿迪光电有限公司 | Liquid crystal lens array and three-dimensional display device |
| CN106896546A (en) * | 2017-03-10 | 2017-06-27 | 上海交通大学 | A kind of method for improving nematic liquid crystal optical modulation device diffraction efficiency |
| CN106896546B (en) * | 2017-03-10 | 2019-12-06 | 上海交通大学 | method for improving diffraction efficiency of nematic liquid crystal light modulation device |
| CN107195764A (en) * | 2017-06-27 | 2017-09-22 | 常州瑞丰特科技有限公司 | dodging device and preparation method thereof |
| CN107688243A (en) * | 2017-10-20 | 2018-02-13 | 上海天马微电子有限公司 | A kind of display device |
| CN108388025B (en) * | 2018-03-09 | 2021-03-05 | 京东方科技集团股份有限公司 | Lens, manufacturing method thereof, glasses and optical system |
| CN108388025A (en) * | 2018-03-09 | 2018-08-10 | 京东方科技集团股份有限公司 | Eyeglass and preparation method thereof, glasses and optical system |
| US10914999B2 (en) | 2018-03-09 | 2021-02-09 | Boe Technology Group Co., Ltd. | Lens, method for fabricating the same, glasses and optical system |
| CN110579167A (en) * | 2018-06-08 | 2019-12-17 | 河北工程大学 | Digital image recording experiment system and method |
| CN111562690A (en) * | 2019-02-13 | 2020-08-21 | 源奇科技股份有限公司 | Adjustable light projector |
| CN111562690B (en) * | 2019-02-13 | 2023-02-28 | 源奇科技股份有限公司 | Adjustable light projector |
| CN113514974A (en) * | 2021-04-19 | 2021-10-19 | 南昌虚拟现实研究院股份有限公司 | Liquid crystal lens zooming processing method and system |
| CN113093432A (en) * | 2021-04-22 | 2021-07-09 | 厦门天马微电子有限公司 | Display panel and display device |
| CN113093432B (en) * | 2021-04-22 | 2022-07-12 | 厦门天马微电子有限公司 | Display panel and display device |
| CN117539083A (en) * | 2024-01-08 | 2024-02-09 | 南昌虚拟现实研究院股份有限公司 | Variable-focus liquid crystal lens |
| CN117539083B (en) * | 2024-01-08 | 2024-04-09 | 南昌虚拟现实研究院股份有限公司 | Variable-focus liquid crystal lens |
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Application publication date: 20130109 |