CN102156348A - Two-liquid zoom lens optical imaging system and method for simulating zoom of human eye - Google Patents
Two-liquid zoom lens optical imaging system and method for simulating zoom of human eye Download PDFInfo
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- CN102156348A CN102156348A CN 201110081217 CN201110081217A CN102156348A CN 102156348 A CN102156348 A CN 102156348A CN 201110081217 CN201110081217 CN 201110081217 CN 201110081217 A CN201110081217 A CN 201110081217A CN 102156348 A CN102156348 A CN 102156348A
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Abstract
The invention relates to a two-liquid zoom lens optical imaging system for simulating zoom of a human eye, wherein the upper and the lower ends of a cylindrical tube are respectively and airtightly connected with an upper cover and a lower cover of a two-liquid zoom lens; a fixed focus lens is airtightly embedded into the central position of the upper cover of the two-liquid zoom lens; two small holes are symmetrically arranged outside the fixed focus lens; the central position of the lower cover of the two-liquid zoom lens is airtightly connected with a flat glass sheet; the inner wall and the lower end face of the cylindrical tube as well as the outer wall of cylindrical tube, contacting with the lower cover of the two-liquid zoom lens, are coated with a hydrophobic dielectric layer; water-based conductive liquid and oiliness insulating liquid are placed in a cylindrical container; and an electrode is respectively led out from the outer wall of the cylindrical tube and the lower cover of the two-liquid zoom lens, which is in contact with the conductive liquid, external voltage is applied between the two electrodes and the liquid interface curvature radius of the two-liquid lens is changed through adjusting an external electric field so as to drive the zoom of a lens system. The two-liquid zoom lens optical imaging system provided by the invention has the advantages of small structure, convenience for implementation and fast response speed; and the conformity of the zoom ranges of the system and the human eye can be realized.
Description
Technical field
The present invention relates to a kind of double-liquid varifocal lens optical imaging system and formation method of simulating the human eye zoom, belong to intraocular micro-optic technical field of imaging, be used for the reparation of eye visual performance.
Background technology
People's vision system is made up of refraction of eye medium and visual system, has formed lightray propagation, opto-electronic conversion and electric signal and has handled, at last the complete procedure of carrying out perception in conjunction with people's the experience of life by visual centre.But, make it the function that to blind because a variety of causes as wound or congenital and posteriori disease, has destroyed this complete vision loop.Certainly this wherein some disease be to recover visual performance by treatment, but still have some diseases to recover by therapeutic treatment.Along with the cross development of medical science and engineering science, people begin to seek a kind of vision prosthesis with the way of engineering science, by stimulating the method that still has the nerve fiber of partial function in blind patient's vision system, help the blind person to regain significant vision.Because its significant medical using value and economic worth, the research that lot of manpower and material resources is carried out the artificial vision is just dropped in countries in the world.
Vision prosthesis mainly is divided into imaging system, Vision information processing and control module and three major parts of optic nerve egersimeter.Through existing literature retrieval is found, domestic research to vision prosthesis at present mainly concentrates on aspects such as principle to vision prosthesis, optic nerve stimulation scheme, and very few to critical piece " imaging system " research of forming vision prosthesis.The patent No. is 200610119252.1, authorization date is on May 27th, 2009, the patent documentation of by name " implantable vision prosthesis " has only provided a kind of overall technical architecture that can make the implantable vision prosthesis that the blind person partly recovers lost eyesight, imaging system wherein only is described as the micro optical lens group that a wide-angle short focal length lens group or Zoom lens group are constituted, and given some characterisitic parameters of this micro optical lens group, but this patent is not analysed in depth the specific implementation of lens combination; The patent No. is 200610024505.7, authorization date is on February 4th, 2009, by name " based on the adjustable artificial crystal of Micro-Opto-Electro-Mechanical Systems " though patent documentation a kind of zoom-lens system that can be used for vision prosthesis is provided, but this zoom-lens system is to drive a negative lens motion and the purpose that reaches zoom under the driving of micro motor, and this zoom mode by mechanical shift realizes not being the choosing of the best in the space so little as human eye.
Summary of the invention
The invention discloses a kind of double-liquid varifocal lens optical imaging system and formation method of simulating the human eye zoom, its purpose is to overcome existing visual imaging technology and focuses mostly in principle, the imaging system that has needs drawbacks such as micro motor drive, the double-liquid varifocal lens optical imaging system of the present invention's design, it is a kind of varifocal optical system of the eyes imaging simulated completely newly, not only solved the technical matters of developing the intraocular micro-optic imaging system that is used for the visual performance reparation, and structure is little, it is convenient to implement, response speed is fast, for the making of artificial vision prosthesis provides valuable gordian technique scheme.
A kind of double-liquid varifocal lens optical imaging system of simulating the human eye zoom, it comprises cylindrical tube, the double-liquid varifocal lens loam cake, the double-liquid varifocal lens lower cover, universal focus lens, flat glass film, oiliness iknsulating liquid and waterborne conductive liquid, be characterized in: the upper end of cylindrical tube is connected with the double-liquid varifocal lens loam cake is airtight, the lower end of cylindrical tube is connected with the double-liquid varifocal lens lower cover is airtight, the airtight embedding universal focus lens of the center perforate of double-liquid varifocal lens loam cake, be symmetrical arranged two apertures outside the fixed lens, the airtight connection flat glass film in double-liquid varifocal lens lower cover center, hydrostatic column of whole formation, the cylindrical tube inwall, lower surface and the cylindrical tube outer wall section that contacts with the double-liquid varifocal lens lower cover apply the hydrophobic dielectric layer of one deck, and hydrostatic column successively injects two kinds of liquid by aperture, i.e. waterborne conductive liquid and oiliness iknsulating liquid.
Cylindrical tube outer wall and the double-liquid varifocal lens lower cover that contacts with conducting liquid are drawn an electrode respectively, between these two electrodes, apply an external voltage, by regulating the liquid surface radius-of-curvature of extra electric field change biliquid lens, drive the lens combination zoom, with double-liquid varifocal lens and universal focus lens combination, realize that the zooming range of system is consistent with the zooming range of human eye.
Cover material is a metal material under described cylindrical tube and the double-liquid varifocal lens.
Described universal focus lens is immersed in the interior liquid of hydrostatic column.
Compared with prior art, the present invention have structure little, implement characteristics such as convenient, that response speed is fast, for the making of artificial vision prosthesis provides valuable gordian technique scheme.
Description of drawings
Fig. 1 is the double-liquid varifocal lens optical imaging system structural representation of simulation human eye zoom;
Fig. 2 is the structural parameters synoptic diagram of system when two kinds of liquid surfaces are the plane in the double-liquid varifocal lens;
To make the liquid surface face type of double-liquid varifocal lens be the plane to impressed voltage under this situation, and the optical interval of liquid surface and former and later two optical surfaces is respectively d
1And d
2, other parameter declarations are please referring to embodiment;
Fig. 3 is the structural parameters synoptic diagram of system when two kinds of liquid surfaces are curved surface in the double-liquid varifocal lens;
Be impressed voltage to make the liquid surface of double-liquid varifocal lens be sphere, its radius-of-curvature is R, the optical interval of liquid surface and former and later two optical surfaces is respectively d '
1And d '
2, other parameters are the same;
Fig. 4 is the relation curve between object distance and the system's focal length when to be system with the object of different object distances all be imaged onto fixing image planes.
1, universal focus lens, 2, aperture, 3, the double-liquid varifocal lens loam cake, 4, cylindrical tube, 5, flat glass film, 6, the double-liquid varifocal lens lower cover, 7, the oiliness iknsulating liquid, 8, waterborne conductive liquid, 9, hydrophobic dielectric layer.
Embodiment
Below in conjunction with drawings and Examples the utility model is described in detail.
As shown in Figure 1: a kind of double-liquid varifocal lens optical imaging system of simulating the human eye zoom, it comprises cylindrical tube 4, double-liquid varifocal lens loam cake 3, double-liquid varifocal lens lower cover 6, universal focus lens 1, flat glass film 5, oiliness iknsulating liquid 7 and waterborne conductive liquid 8, the upper end of cylindrical tube 4 and 3 airtight connections of double-liquid varifocal lens loam cake, the lower end of cylindrical tube 4 and 6 airtight connections of double-liquid varifocal lens lower cover, the center perforate of double-liquid varifocal lens loam cake 3 and airtight embedding universal focus lens 1, be symmetrical arranged two apertures 2 on the double-liquid varifocal lens loam cake 3 outside the universal focus lens 1, the airtight connection flat glass film 5 in double-liquid varifocal lens lower cover 6 centers, hydrostatic column of whole formation, the cylindrical tube inwall, lower surface and the cylindrical tube outer wall section that contacts with the double-liquid varifocal lens lower cover apply the hydrophobic dielectric layer 9 of one deck, and container inwardly successively injects two kinds of liquid, i.e. waterborne conductive liquid 8 and oiliness iknsulating liquid 7 by aperture 2; Oiliness iknsulating liquid and waterborne conductive liquid respectively account for half of cylinder shape metal container volume.
Present embodiment cylindrical tube 4 and double-liquid varifocal lens lower cover 6 materials are copper, and round tube inside diameter is 6.5mm; Universal focus lens 1 and flat glass film 5 materials are BK7 glass, refractive index n
3=n
4=1.5168; The radius-of-curvature of former and later two planes of refraction of universal focus lens is respectively R
01=11mm and R
02=-70mm, center thickness d
01=2mm; The thickness d of flat glass film
03=0.3mm; The height d that universal focus lens 1 immerses in the liquid
02=0.7mm; The hydrophobic dielectric layer material that cylindrical tube 4 inwalls, lower surface and the cylindrical tube outer wall section that contacts with the double-liquid varifocal lens lower cover apply is Parylene or Teflon; The oiliness iknsulating liquid is a bromododecane in the canister, its refractive index n
1=1.45; Waterborne conductive liquid is sodium-chloride water solution, and its refractive index is n
2=1.3398; The length d of cylindrical tube
0=6mm.
A kind of formation method of simulating the double-liquid varifocal lens optical imaging system of human eye zoom, be to draw an electrode respectively at cylindrical tube outer wall and the double-liquid varifocal lens lower cover that contacts with conducting liquid, between these two electrodes, apply an external voltage, this voltage makes the dielectric layer two sides on the cylindrical tube inwall assemble positive and negative charge, cause the liquid interfacial tension between conducting liquid and the cylindrical tube inwall to change by regulating extra electric field, thereby cause the change of shape of liquid surface, change the liquid surface radius-of-curvature of biliquid lens, because the refractive index of conducting liquid and iknsulating liquid is inequality, therefore impressed voltage causes the focal length of lens to change, by the combination of double-liquid varifocal lens and universal focus lens, realize that the zooming range of system is consistent with the zooming range of human eye.
The zooming range of feasible system of the present invention is consistent with the zooming range of human eye, and its theoretical analysis is as follows: because retina is fixed at human eye during to the different object distances imaging, promptly the position of imaging surface is constant.Therefore at first should establish fixedly image planes at this patent designed system, lens are asserted the fixedly position of image planes to the nearest object point and the point midway of object point imaging picture point farthest when in the present embodiment impressed voltage being made the liquid surface of double-liquid varifocal lens be the plane.Consider that then with the object image-forming of different object distances corresponding liquid surface radius-of-curvature on the determined fixedly image planes be much, how many focal lengths of the lens that this moment is corresponding is, promptly can obtain the relation of object distance and system's focal length.Concrete steps are as follows:
1. with reference to each parameter shown in the figure 2, when impressed voltage made the liquid surface of double-liquid varifocal lens be the plane, computing system was l ' to the picture point of infinite distance object image-forming to the distance of flat glass film
∞
2. with reference to each parameter shown in the figure 2, when impressed voltage made the liquid surface of double-liquid varifocal lens be the plane, computing system was to minimum object distance l
0The picture point of=-100mm imaging is l ' to the distance of flat glass film
0
3. definite fixedly image planes are that optical imaging system is l ' to amphiblestroid distance to the distance of flat glass film
f
4. with reference to each parameter shown in the figure 3, when impressed voltage makes the liquid surface of double-liquid varifocal lens be curved surface, the relation when computing system is imaged onto fixing image planes with any object distance between object distance and the double-liquid varifocal lens liquid surface curvature.The system that promptly provides is the relation between object distance and the double-liquid varifocal lens liquid surface curvature on the retina time on fixing image planes with object image-forming.
5. when impressed voltage makes the liquid surface of double-liquid varifocal lens be curved surface, it is the relation between object distance and the system's focal length on the retina time that computing system is imaged onto fixing image planes with any object distance.
According to the value of above given correlation parameter and relation curve that the relation between object distance and the double-liquid varifocal lens liquid surface curvature can simulate object distance and system's focal length as shown in Figure 4, this curve provided system to 100mm (corresponding to 20 years old people's anomalistic distance) during to the object distance imaging of infinite distant place the focal length value of system be 18mm to 23mm, the zooming range that analog result shows this system and the eyes imaging system zooming range during to the object automatic focusing of any distance is consistent.The present invention has successfully realized a kind of double-liquid varifocal lens optical imaging system of simulating the human eye zoom.
Claims (4)
1. double-liquid varifocal lens optical imaging system of simulating the human eye zoom, it comprises cylindrical tube, the double-liquid varifocal lens loam cake, the double-liquid varifocal lens lower cover, universal focus lens, flat glass film, oiliness iknsulating liquid and waterborne conductive liquid, it is characterized in that: the upper end of cylindrical tube is connected with the double-liquid varifocal lens loam cake is airtight, the lower end of cylindrical tube is connected with the double-liquid varifocal lens lower cover is airtight, the airtight embedding universal focus lens of the center perforate of double-liquid varifocal lens loam cake, be symmetrical arranged two apertures outside the fixed lens, the airtight connection flat glass film in double-liquid varifocal lens lower cover center, hydrostatic column of whole formation, the cylindrical tube inwall, lower surface and the cylindrical tube outer wall section that contacts with the double-liquid varifocal lens lower cover apply the hydrophobic dielectric layer of one deck, and hydrostatic column successively injects two kinds of liquid by aperture, i.e. waterborne conductive liquid and oiliness iknsulating liquid.
2. the formation method of the double-liquid varifocal lens optical imaging system of simulation human eye zoom according to claim 1, it is characterized in that: cylindrical tube outer wall and the double-liquid varifocal lens lower cover that contacts with conducting liquid are drawn an electrode respectively, between these two electrodes, apply an external voltage, by regulating the liquid surface radius-of-curvature of extra electric field change biliquid lens, drive the lens combination zoom, with double-liquid varifocal lens and universal focus lens combination, realize that the zooming range of system is consistent with the zooming range of human eye.
3. the double-liquid varifocal lens optical imaging system of simulation human eye zoom according to claim 1 is characterized in that: cover material is a metal material under described cylindrical tube and the double-liquid varifocal lens.
4. the double-liquid varifocal lens optical imaging system of simulation human eye zoom according to claim 1 is characterized in that: described universal focus lens is immersed in the interior liquid of hydrostatic column.
Priority Applications (1)
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|---|---|---|---|
| CN2011100812176A CN102156348B (en) | 2011-03-31 | 2011-03-31 | Two-liquid zoom lens optical imaging system and method for emulating zoom of human eye |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100812176A CN102156348B (en) | 2011-03-31 | 2011-03-31 | Two-liquid zoom lens optical imaging system and method for emulating zoom of human eye |
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| CN102156348A true CN102156348A (en) | 2011-08-17 |
| CN102156348B CN102156348B (en) | 2012-02-01 |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102580320A (en) * | 2012-02-09 | 2012-07-18 | 徐秀章 | Toy dog with simulated eyes |
| CN102670161A (en) * | 2012-05-02 | 2012-09-19 | 温州医学院眼视光研究院 | Analog eye with adjustable diopter |
| CN102831810A (en) * | 2012-08-16 | 2012-12-19 | 温州医学院眼视光研究院 | Human-eye simulation calibrating model |
| CN103308962A (en) * | 2012-03-07 | 2013-09-18 | 叶哲良 | Electrode structure applied to dielectric liquid lens |
| CN103489361A (en) * | 2013-09-24 | 2014-01-01 | 上海理工大学 | Dual-liquid varifocal lens human eye system by using electric control for focusing and focusing method |
| CN105116541A (en) * | 2015-07-01 | 2015-12-02 | 南京邮电大学 | Aspheric surface analysis method for simulating human eye crystalline lens based on three-liquid lens structure |
| CN105551358A (en) * | 2016-01-26 | 2016-05-04 | 温州眼视光发展有限公司 | Simulation eye |
| CN108152950A (en) * | 2018-03-19 | 2018-06-12 | 宁波高斯医疗科技有限公司 | A kind of optical lens for being used to simulate human eye |
| WO2020051758A1 (en) * | 2018-09-11 | 2020-03-19 | 温州医科大学 | Model eye for fundus imaging system test |
| CN114296163B (en) * | 2021-12-31 | 2024-01-12 | 核工业西南物理研究院 | Zoom lens capable of changing liquid optical medium and zooming method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102580320A (en) * | 2012-02-09 | 2012-07-18 | 徐秀章 | Toy dog with simulated eyes |
| CN103308962B (en) * | 2012-03-07 | 2015-06-24 | 叶哲良 | Electrode structure applied to dielectric liquid lens |
| CN103308962A (en) * | 2012-03-07 | 2013-09-18 | 叶哲良 | Electrode structure applied to dielectric liquid lens |
| CN102670161B (en) * | 2012-05-02 | 2014-05-07 | 温州医学院眼视光研究院 | Analog eye with adjustable diopter |
| CN102670161A (en) * | 2012-05-02 | 2012-09-19 | 温州医学院眼视光研究院 | Analog eye with adjustable diopter |
| CN102831810A (en) * | 2012-08-16 | 2012-12-19 | 温州医学院眼视光研究院 | Human-eye simulation calibrating model |
| CN103489361A (en) * | 2013-09-24 | 2014-01-01 | 上海理工大学 | Dual-liquid varifocal lens human eye system by using electric control for focusing and focusing method |
| CN103489361B (en) * | 2013-09-24 | 2016-09-14 | 上海理工大学 | Utilize double-liquid varifocal lens human eye system and the focus adjustment method of automatically controlled focusing/zooming |
| CN105116541B (en) * | 2015-07-01 | 2017-09-26 | 南京邮电大学 | The aspherical analysis method of human lenses is simulated based on three liquid lens structures |
| CN105116541A (en) * | 2015-07-01 | 2015-12-02 | 南京邮电大学 | Aspheric surface analysis method for simulating human eye crystalline lens based on three-liquid lens structure |
| CN105551358A (en) * | 2016-01-26 | 2016-05-04 | 温州眼视光发展有限公司 | Simulation eye |
| CN105551358B (en) * | 2016-01-26 | 2018-09-21 | 温州眼视光发展有限公司 | A kind of simulated eye |
| CN108152950A (en) * | 2018-03-19 | 2018-06-12 | 宁波高斯医疗科技有限公司 | A kind of optical lens for being used to simulate human eye |
| WO2020051758A1 (en) * | 2018-09-11 | 2020-03-19 | 温州医科大学 | Model eye for fundus imaging system test |
| CN114296163B (en) * | 2021-12-31 | 2024-01-12 | 核工业西南物理研究院 | Zoom lens capable of changing liquid optical medium and zooming method |
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