CN101685171A - Mechanical driven hybrid refractive-diffractive zooming liquid lens - Google Patents

Mechanical driven hybrid refractive-diffractive zooming liquid lens Download PDF

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Publication number
CN101685171A
CN101685171A CN200810151133A CN200810151133A CN101685171A CN 101685171 A CN101685171 A CN 101685171A CN 200810151133 A CN200810151133 A CN 200810151133A CN 200810151133 A CN200810151133 A CN 200810151133A CN 101685171 A CN101685171 A CN 101685171A
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CN
China
Prior art keywords
liquid lens
baseplate
diffractive
lens
substrate
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Pending
Application number
CN200810151133A
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Chinese (zh)
Inventor
张薇
田维坚
鲍赟
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XiAn Institute of Optics and Precision Mechanics of CAS
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XiAn Institute of Optics and Precision Mechanics of CAS
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Application filed by XiAn Institute of Optics and Precision Mechanics of CAS filed Critical XiAn Institute of Optics and Precision Mechanics of CAS
Priority to CN200810151133A priority Critical patent/CN101685171A/en
Priority to PCT/CN2008/002128 priority patent/WO2010034145A1/en
Publication of CN101685171A publication Critical patent/CN101685171A/en
Pending legal-status Critical Current

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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
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/18—Diffraction gratings
    • G02B5/1876—Diffractive Fresnel lenses; Zone plates; Kinoforms
    • G02B5/189—Structurally combined with optical elements not having diffractive power
    • G02B5/1895—Structurally combined with optical elements not having diffractive power such optical elements having dioptric power

Abstract

The invention relates to a mechanical driven hybrid refractive-diffractive zooming liquid lens which comprises a baseplate framework, a baseplate and a transparent elastic membrane, wherein the periphery of the baseplate is embedded into an annular groove at the inner side of the baseplate framework, the baseplate is hermetically connected with the baseplate framework, the baseplate is a diffractive surface baseplate, a filling liquid is filled in a seal cavity body formed by the baseplate and the transparent elastic membrane, and the seal cavity body is communicated with a cavity body of a control piston. The invention solves the technical problems that an ordinary liquid lens does not have design freedom degree and aberration optimization can not be carried out on a single liquid lens inthe background art. A planar substrate of the liquid lens is directly used as a diffraction optical surface, the design freedom degree of aberrational correction is provided for the liquid lens underthe condition of not increasing the weight and the size of the liquid lens or influencing the structure and the stability of the liquid lens, different diffraction surface parameters can be reasonably designed according to different imaging and zooming requirements, and the imaging quality of the single liquid lens is improved according to the image quality optimization design required for the liquid lens.

Description

Mechanical driven hybrid refractive-diffractive zooming liquid lens
Technical field
The present invention relates to a kind of liquid Zoom lens, be specifically related to a kind of mechanical driven hybrid refractive-diffractive zooming liquid lens.
Background technology
The liquid Zoom lens is a kind of novel optical element according to the bionics principle proposition in the world, mainly contain and utilize Zoom lens that electric wetting fluid contact angle changes and based on the Zoom lens of filling liquid surface curvature change, characteristics such as they have wide tunable range, zoom capabilities is strong, zoom is level and smooth, with low cost, handling ease have good application prospects.
The common liq lens, it no matter is the Zoom lens that the Zoom lens that utilizes electric wetting fluid contact angle to change also is based on the filling liquid surface curvature change, according to aberration equations, required focal power is in case determine, interfacial curvature is just determined thereupon between the surface curvature of lens or two kinds of non soluble liquids.Therefore, under the situation that required focal power is determined, an independent liquid lens itself does not have the degree of freedom of aberration correction, and this makes that lens can not blur-free imaging in imaging process.When liquid lens is applied to the design of zoom system, pancreatic system, because liquid lens itself can not aberration correction, if require system's blur-free imaging, can make system complex, the eyeglass number increases, and is unfavorable for microminiaturization, the dexterityization of zoom system, pancreatic system.
Referring to as Fig. 1, have the driving liquid lens of standard machinery now, mainly constitute by substrate glasses plate 111, filling liquid 112, transparent elastic film 113, framework 114, cavity body 116 and piston 115.Its general stepper motor or driven plunger such as air pressure, hydraulic pressure 115 of adopting are moved, filling liquid 112 volume distributed median in the cavity body 116 are changed, the radius of curvature R that causes transparent elastic film 113 surfaces changes, thereby the focal distance f of Mechanical Driven type liquid lens is changed.Following system of equations is satisfied in the variation of focal distance f:
Φ = 1 f ′ = n - 1 R ;
ΔV = 1 3 π ( R - R 2 - r 0 2 ) 2 [ 2 R + R 2 - r 0 2 ] ;
Wherein, Φ is the focal power of liquid lens, and f is the focal length of liquid lens, and n is the refractive index of filling liquid 112 in the cavity body 116, and R is the radius-of-curvature on transparent elastic film 113 surfaces, r 0Be the radius of the effective clear aperture of liquid lens, Δ V is the variable quantity of piston 115 motions causing volume.Corresponding to certain focal power Φ, because a surperficial substrate glasses plate 111 of Mechanical Driven type liquid lens is the plane, the radius of curvature R of another surface transparent elastic film 113 must be certain, could realize required focal power Φ like this, the degree of freedom that therefore is used for picture element optimization in optical design is zero.
In recent years, for the research of this class component focus mostly on image-forming principle checking and lens arrangement and stable aspect, do not see the research report for the raising of lens imaging quality as yet with improving.
At present, Philip company, Samsung, company limited of Lucent Technologies etc. are very fast to the design studies technical progress of liquid lens, some research institutions such as good fortune Flo-Rida-Low center university etc. have also carried out research to the liquid lens of Mechanical Driven type, mainly comprise version, filling liquid, control mode of liquid lens etc.But, as single varifocal element, how to proofread and correct liquid lens aberration, improve the lens imaging quality, make that the technical research aspect the acquisition photo-quality imaging quality does not see that so far report is arranged under the situation of weight and volume minimum.Domestic Shanghai University of Science and Technology, Tsing-Hua University etc. have also carried out the research of liquid lens aspect in recent years, but all are at the imaging mechanism of liquid lens and the research of manufacture craft aspect mostly, also do not see about improving the report of single liquid lens image quality.
Summary of the invention
The object of the present invention is to provide a kind of mechanical driven hybrid refractive-diffractive zooming liquid lens, it has solved, and the common liq lens do not have design freedom in the background technology, can't carry out the technical matters that aberration is optimized on the monolithic liquid lens.
Design proposal of the present invention is as follows:
A kind of mechanical driven hybrid refractive-diffractive zooming liquid lens, comprise base panel frame 214, also comprise substrate 211 and transparent elastic film 213 that periphery is embedded in the annular recess 216 of base panel frame 214 inboards, is tightly connected with base panel frame 214, be filled with filling liquid 212 in the seal chamber 217 that described substrate 211 and transparent elastic film 213 constitute, described seal chamber 217 is connected with the cavity of control piston 215; Its special character is: described substrate 211 is the diffraction surfaces substrate.
Above-described diffraction surfaces substrate can adopt glass material substrate or optical plastic substrate etc.
Filling liquid 212 in the above seal chamber 217 are immiscible and the transparency liquid of chemical reaction do not take place with transparent elastic film 213.
Filling liquid 212 in the above seal chamber 217 can adopt water or wet goods.
The present invention has following advantage:
1. increase the design freedom of liquid lens, made the monolithic liquid lens can realize achromatism, spherical aberration.
The present invention with the planar substrates of liquid lens directly as the diffraction optics face, at weight that does not increase liquid lens and volume, do not influence under the condition of liquid lens structure and stability and provide the design freedom of aberration correction for liquid lens, according to different imagings and zoom requirement, can the different diffraction surfaces parameter of appropriate design, as required liquid lens is carried out the picture element optimal design, improve the image quality of single liquid lens.
3. the present invention directly is integrated in the liquid lens substrate with diffraction optical element, and liquid lens can be applied in the design of miniature, dexterityization zoom system, have good imaging quality, volume little, in light weight, make characteristics simple, that be easy to control.
4. adopt the present invention can make varifocal optical system have littler volume and weight, make simple a slice or the two foldings hybrid liquid lens that spreads out that adopts realize that the zoom system, pancreatic system that improves imaging becomes possibility.
5. can expand to more widely and various image quality is had higher requirements, again system dimension be had in the system of strict demand simultaneously, can guarantee the microminiaturization of system.
Description of drawings
Fig. 1 is the structural representation of the existing driving liquid lens of standard machinery.
Fig. 2 rolls over the system architecture synoptic diagram of the driving liquid lens of mixing machinery that spreads out for the present invention.
Fig. 3 is the modulation transfer function (MTF) curve synoptic diagram of the existing driving liquid lens of standard machinery under short focal length.
Fig. 4 spreads out the driving liquid lens of mixing machinery at the modulation transfer function (MTF) curve synoptic diagram of lacking under the focal length for the present invention's folding.
Fig. 5 is the existing modulation transfer function (MTF) curve synoptic diagram of the driving liquid lens of standard machinery under long-focus.
Fig. 6 rolls over the modulation transfer function (MTF) curve synoptic diagram of the driving liquid lens of mixing machinery under long-focus that spread out for the present invention.
Fig. 7 is the driving liquid lens of the standard machinery synoptic diagram that focal length changes under different wave length.
Fig. 8 is the present invention folding driving liquid lens of the mixing machinery synoptic diagram that focal length changes under different wave length that spreads out.
Accompanying drawing drawing explanation: 111-substrate glasses plate, 112-filling liquid, 113-transparent elastic film, 114-framework, 115-piston; The 116-cavity body; The 211-substrate, 212-filling liquid, 213-transparent elastic film, 214-base panel frame, 215-control piston, 216-groove, 217-seal chamber.
Embodiment
The present invention will have common plane substrate of glass in the common liq lens now, and to be designed to diffraction optical element be the diffraction surfaces substrate, added the diffraction optics face by adopting diffraction optical element, introduced the phase function of binary face:
φ ( r ) = 2 π λ ( A 1 y 2 + A 2 y 4 + . . . )
The introducing of binary phase function, make matching of liquid lens aberration and the number formation become following form:
S I = y 4 4 { φ r 3 [ ( n n - 1 ) 2 + n + 2 n ( n - 1 ) 2 + 4 ( n + 1 ) n 1 ( n - 1 ) C r + 3 n 1 + 2 n 1 C r 2 ] + φ d 3 [ ( 1 + 3 C d 2 ) - 32 mλ A 2 ] }
S II = - y 2 H { φ r 2 2 [ n + 1 n ( n - 1 ) + 2 n + 1 n C r ] + φ d C d }
S III＝H 2(φ r+φ d)＝H 2φ
S IV = H 2 ( φ r n )
S V＝0
Wherein, S I-S VBe five aberrations and the number of lens, reflect the size of spherical aberration, coma, astigmatism, the curvature of field and distortion respectively.φ rIt is the focal power that lens shape that filling liquid constitutes is born; φ dIt is the focal power that the diffraction optics face is born; Y is marginal ray and the lens intersection point distance to optical axis; N is the refractive index of filling liquid; H is the Laplace invariant; C r, C dBe respectively the conjugate factor of lens shape that filling liquid constitutes and diffraction surfaces, the aperture angle decision of incident and outgoing during by light process lens shape that filling liquid constitutes or diffraction surfaces; M is the corresponding order of diffraction time (not specializing common m=1); λ is a corresponding wavelength; A 2Be four item coefficients in the binary face phase function, i.e. quadravalence asphericity coefficient.
Add the design of diffraction optics face in Mechanical Driven type liquid lens system after, it matches to such an extent that a quadravalence asphericity coefficient A occurred in aberration and the number 2This asphericity coefficient makes liquid lens system have a design freedom, thereby makes single liquid lens can realize the aberration optimal design.The quadravalence asphericity coefficient can be used for the spherical aberration correction of liquid lens.Simultaneously because the negative dispersion characteristic of diffraction surfaces also may realize the achromatism of Mechanical Driven type liquid lens.
The present invention directly is integrated in the liquid lens substrate with diffraction optical element, be about to the primary structure ingredient of diffraction optics face as liquid lens, this method can not change the design freedom that aberration correction is provided for liquid lens under liquid lens weight, size, the stability condition, thereby can carry out the picture element optimal design to liquid lens as required, improve the liquid lens image quality.The invention enables simple employing a slice or the two foldings hybrid liquid lens that spreads out to realize that the zoom system, pancreatic system that improves imaging becomes possibility.According to different imagings and zoom requirement, can the different diffraction surfaces parameter of appropriate design.
Fig. 2 is specially the present invention and adopts the system architecture synoptic diagram of rolling over the driving liquid lens of mixing machinery that spreads out, base panel frame 214 inboards have an annular recess 216, and the periphery of substrate 211 and transparent elastic film 213 is embedded in the annular recess 216 and with base panel frame 214 and is tightly connected.Transparent elastic film 213 adopts optically transparent elastic film, requires immiscible and chemical reaction do not take place with filling liquid 212.Be filled with filling liquid 212 in the seal chamber 217 that substrate 211 and transparent elastic film 213 constitute, filling liquid 212 is general to adopt water, wet goods and transparent elastic film 213 immiscible and the transparency liquid of chemical reaction do not take place.Seal chamber 217 is connected with the cavity of control piston 215.Substrate 211 is the diffraction surfaces substrate, and the diffraction surfaces substrate is a diffraction optical element, specifically can adopt glass material substrate or other optical material substrate, as: optical plastic etc.Diffraction surfaces substrate of the present invention can partly be eliminated spherical aberration and the elementary aberration of rolling over the driving liquid lens of mixing machinery that spreads out, makes that rolling over the driving liquid lens of mixing machinery that spreads out obtains more perfect image on image planes.
The present invention folding spreads out the contrast of modulation transfer function (MTF) in the focal length variations of mixing material lens and the common liq focal length of lens change procedure referring to Fig. 3,4,5,6.As seen after adding diffraction surfaces, the modulation transfer function (MTF) of system under different focal all obviously improves, and image quality is optimised.
The present invention folding spreads out the contrast of aberration in the focal length variations of mixing material lens and the common liq focal length of lens change procedure referring to Fig. 7,8.As seen after adding diffraction surfaces, system's focal length variations curve overlaps under three wavelength better, and system's aberration obviously reduces.

Claims (4)

1. mechanical driven hybrid refractive-diffractive zooming liquid lens, comprise base panel frame (214), also comprise substrate (211) and transparent elastic film (213) that periphery is embedded in the inboard annular recess (216) of base panel frame (214), is tightly connected with base panel frame (214), be filled with filling liquid (212) in the seal chamber (217) that described substrate (211) and transparent elastic film (213) constitute, described seal chamber (217) is connected with the cavity of control piston (215); It is characterized in that: described substrate (211) is the diffraction surfaces substrate.
2. mechanical driven hybrid refractive-diffractive zooming liquid lens according to claim 1 is characterized in that: described diffraction surfaces substrate is glass material substrate or optical plastic substrate.
3. mechanical driven hybrid refractive-diffractive zooming liquid lens according to claim 1 and 2 is characterized in that: the filling liquid (212) in the described seal chamber (217) is immiscible and the transparency liquid of chemical reaction do not take place with transparent elastic film (213).
4. mechanical driven hybrid refractive-diffractive zooming liquid lens according to claim 3 is characterized in that: the filling liquid (212) in the described seal chamber (217) is water or oil.
CN200810151133A 2008-09-26 2008-09-26 Mechanical driven hybrid refractive-diffractive zooming liquid lens Pending CN101685171A (en)

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CN200810151133A CN101685171A (en) 2008-09-26 2008-09-26 Mechanical driven hybrid refractive-diffractive zooming liquid lens
PCT/CN2008/002128 WO2010034145A1 (en) 2008-09-26 2008-12-30 Mechanically actuated hybrid diffractive-refractive variable-focus liquid lens

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Cited By (15)

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CN102385078A (en) * 2011-10-25 2012-03-21 洛阳师范学院 Remote-controlled continuous zoom lens with liquid
CN102636885A (en) * 2011-02-14 2012-08-15 张晟廷 Presbyopic and myopic dual-purpose spectacles with diaphragm regulation liquid
CN102636884A (en) * 2011-02-14 2012-08-15 张晟廷 Presbyopic and myopic dual-purpose spectacles with piston regulation liquid
CN103076643A (en) * 2011-10-25 2013-05-01 洛阳师范学院 Liquid continuous zooming lens
CN103576217A (en) * 2013-11-11 2014-02-12 浙江大学 Human-eye-crystalline-lens adjustment imitating liquid zoom lens and aberration correction method of human-eye-crystalline-lens adjustment imitating liquid zoom lens
WO2016000178A1 (en) * 2014-06-30 2016-01-07 华为技术有限公司 Variable focus lens and mobile terminal
CN105629452A (en) * 2016-01-21 2016-06-01 四川大学 Zooming microscope objective capable of automatically correcting aberration
CN105143926B (en) * 2013-01-31 2017-06-06 Adlens有限公司 The actuating of the lens of fluid filling
CN107085254A (en) * 2017-05-09 2017-08-22 厦门新鸿洲精密科技有限公司 A kind of mechanism that focusing is realized by changing liquid crystal curvature
CN107922181A (en) * 2015-09-24 2018-04-17 英特尔公司 MEMS LED zooms
CN110133769A (en) * 2019-06-12 2019-08-16 北京理工大学 Ultra-thin liquid film zoom lens based on surface tension of liquid effect
CN110146985A (en) * 2018-12-29 2019-08-20 深圳珑璟光电技术有限公司 It is a kind of based on aspherical variable focal length AR glasses
CN113260885A (en) * 2018-12-28 2021-08-13 奥普托图尼康苏默尔股份公司 Lens comprising adjustable optical power
CN113820855A (en) * 2021-08-31 2021-12-21 华中科技大学 Design method of electromagnetic drive bidirectional zoom liquid lens
CN115128794A (en) * 2021-03-25 2022-09-30 中强光电股份有限公司 Light uniformizing element

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CN102636885A (en) * 2011-02-14 2012-08-15 张晟廷 Presbyopic and myopic dual-purpose spectacles with diaphragm regulation liquid
CN102636884A (en) * 2011-02-14 2012-08-15 张晟廷 Presbyopic and myopic dual-purpose spectacles with piston regulation liquid
CN102385078B (en) * 2011-10-25 2016-06-29 洛阳师范学院 A kind of remote-controlled continuous zoom lens with liquid
CN103076643A (en) * 2011-10-25 2013-05-01 洛阳师范学院 Liquid continuous zooming lens
CN102385078A (en) * 2011-10-25 2012-03-21 洛阳师范学院 Remote-controlled continuous zoom lens with liquid
CN103076643B (en) * 2011-10-25 2016-11-02 洛阳师范学院 A kind of liquid zooming lens
CN105143926B (en) * 2013-01-31 2017-06-06 Adlens有限公司 The actuating of the lens of fluid filling
CN103576217B (en) * 2013-11-11 2015-08-19 浙江大学 The liquid zoom lens that Prosthetic Hand crystalline lens regulates and aberration correcting method thereof
CN103576217A (en) * 2013-11-11 2014-02-12 浙江大学 Human-eye-crystalline-lens adjustment imitating liquid zoom lens and aberration correction method of human-eye-crystalline-lens adjustment imitating liquid zoom lens
WO2016000178A1 (en) * 2014-06-30 2016-01-07 华为技术有限公司 Variable focus lens and mobile terminal
CN107922181A (en) * 2015-09-24 2018-04-17 英特尔公司 MEMS LED zooms
CN105629452A (en) * 2016-01-21 2016-06-01 四川大学 Zooming microscope objective capable of automatically correcting aberration
CN107085254A (en) * 2017-05-09 2017-08-22 厦门新鸿洲精密科技有限公司 A kind of mechanism that focusing is realized by changing liquid crystal curvature
CN113260885A (en) * 2018-12-28 2021-08-13 奥普托图尼康苏默尔股份公司 Lens comprising adjustable optical power
CN110146985A (en) * 2018-12-29 2019-08-20 深圳珑璟光电技术有限公司 It is a kind of based on aspherical variable focal length AR glasses
CN110146985B (en) * 2018-12-29 2024-03-26 深圳珑璟光电技术有限公司 Variable focal length AR glasses based on aspheric surface
CN110133769B (en) * 2019-06-12 2020-08-28 北京理工大学 Ultrathin liquid film zoom lens based on liquid surface tension effect
CN110133769A (en) * 2019-06-12 2019-08-16 北京理工大学 Ultra-thin liquid film zoom lens based on surface tension of liquid effect
CN115128794A (en) * 2021-03-25 2022-09-30 中强光电股份有限公司 Light uniformizing element
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CN113820855A (en) * 2021-08-31 2021-12-21 华中科技大学 Design method of electromagnetic drive bidirectional zoom liquid lens

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