CN105842840A - Symmetric zoom lens imitating layered structure of crystalline lens - Google Patents
Symmetric zoom lens imitating layered structure of crystalline lens Download PDFInfo
- Publication number
- CN105842840A CN105842840A CN201510932318.8A CN201510932318A CN105842840A CN 105842840 A CN105842840 A CN 105842840A CN 201510932318 A CN201510932318 A CN 201510932318A CN 105842840 A CN105842840 A CN 105842840A
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- lens
- pressure ring
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- optical liquid
- annular seal
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B26/00—Optical devices or arrangements for the control of light using movable or deformable optical elements
- G02B26/004—Optical devices or arrangements for the control of light using movable or deformable optical elements based on a displacement or a deformation of a fluid
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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
Abstract
The invention discloses a symmetric zoom lens imitating a layered structure of a crystalline lens, including a housing; and a first lens unit, a second lens unit, a third lens unit, a first plug and a second plug that are disposed in the housing. The first lens unit comprises a front lens. The third lens unit comprises a rear lens. The second lens unit comprises sequentially a first compression ring, a first lens, a second compression ring, a second lens, a third compression ring, a third lens, a fourth compression ring, a fourth lens and a fifth compression ring; and first, second and third sealing cavities formed thereamong. The sealing cavities are filled with optical liquid. The zoom lens in the invention varies the surface curvature radius of a transparent elastic lens by injecting or extracting the optical liquid in the sealing cavities, and thus achieves continuous zooming in a zoom range required in the design. The invention has the advantages of small size, high imaging quality, stable optical axis, convenient operation, easy machining and so forth, and can be widely applied to various modern imaging systems.
Description
Technical field
The present invention relates to a kind of bionic machine sighting device, particularly relate to a kind of imitative crystalline lens layer structure symmetrical expression zoom lens.
Background technology
Along with intelligent, miniaturization, integrated demand strengthen increasingly, bio-robot technology is of increasing concern, it has also become the popular direction of engineering science field development.Its principle be by the study of biosystem structure, function, operating mechanism and control principle, imitate, replicate and reproduce, improve existing or create brand-new machinery, instrument, processing technique etc..Bio-robot integrates numerous high-tech, and non-fabrication field is not only moved towards in its application from manufacture field, and the most constantly to military, anti-riot, medical, service, the non-industrial circle extension such as amusement.
For robot, vision is a kind of very important perception means.Traditional zoom or focusing, need to use the special motor that drives to control the mechanical location offer of stand-alone assembly accurately, it is achieved stand-alone assembly moves along the track accurately calculated, and adjusts the optical distance between each optical module.The most traditional zoom lens structure is complicated, and response speed is limited, and relatively costly.In miniaturization fall process, the ratio of its surface of traditional zoom lens and volume increases so that the impact of friction becomes notable, brings difficulty to miniaturization.Can not put no, human eye is not only simple in structure, and either physical dimension, response speed, or the every outstanding function possessed, the most current made any imaging device.Its most crucial reason is, the various characteristics that human lens is possessed.Crystalline lens shrinking or the regulation loosened by ciliary muscle, it is possible to change the radius of curvature of its front and rear surfaces, thus change the diopter of human eye, make different distance object can imaging on the retina.But, according to existing biomedical research achievement, the amplitude of variation of crystalline lens front and rear surfaces is the least, and during focal length changes, eyes imaging quality does not decline.A very important reason is, crystalline lens is to be made up of plural layers, and its refractive index is gradually increased from outer layers towards inner layers, distribution gradient.
In recent years, lot of domestic and international researcher proposes bionical zoom lens, and its zoom principle is namely based on human eye and changes the mechanism of surface curvature radius, has that volume is little, response is fast, simple in construction, low cost and other advantages.But existing design is the lenticular internal structure of consideration, there is design freedom few simultaneously, image quality is not ideal enough waits deficiency so that bionical zoom lens also cannot be comparable with traditional zoom lens.
Summary of the invention
It is an object of the invention to provide a kind of imitative crystalline lens layer structure symmetrical expression zoom lens, utilize transparent elastic lens and optical liquid, imitate the layer structure of human lens, bigger optical design freedom is provided, use symmetrical expression optical texture, improve bionical zoom lens technology, improve image quality.
For achieving the above object, the technical solution used in the present invention is as follows:
A kind of Prosthetic Hand crystalline lens layer structure symmetrical expression zoom lens, the first lens unit of including shell and being located in shell, the second lens unit, the 3rd lens unit, and stick harness one and stick harness two, described first lens unit includes supplementary lens, described 3rd lens unit includes rearmounted lens, described second lens unit includes pressure ring one, lens one, pressure ring two, lens two, pressure ring three, lens three, pressure ring four, lens four and pressure ring five successively, wherein, lens one, lens two, lens three, lens four are transparent elastic lens；
Described lens one, lens two and pressure ring two constitute the first annular seal space, described lens two, lens three and pressure ring three constitute the second annular seal space, described lens three, lens four and pressure ring four constitute the 3rd annular seal space, described first annular seal space and the 3rd annular seal space are respectively by being located at the through hole on pressure ring two and pressure ring four and the channel connection stick harness one on shell, and described second annular seal space is by the through hole being located on pressure ring three and the channel connection stick harness two on shell；Being provided with diaphragm in described pressure ring three, described diaphragm is positioned at the center of the second lens unit, as the field stop of described zoom lens；
Filling optical liquid one in described stick harness one, described optical liquid one passes through into or out described first annular seal space of piston effect and the 3rd annular seal space of stick harness one；Optical liquid two, the described optical liquid two into or out described second annular seal space of piston effect by stick harness two is filled in described stick harness two.
Further, described optical liquid one and optical liquid two have different refractive indexs, meet condition: Nq1<Nq2, wherein Nq1It is the refractive index of optical liquid one, Nq2It it is the refractive index of optical liquid two；Described lens one, lens two, lens three, lens four use commaterial to make, and have identical refractive index Ns, and meet condition: Nq1<Ns<Nq2。
Further, before and after described lens one, lens two, lens three, lens four, surface is parabola, each paraboloidal shape and edge thickness and is optimized calculating according to optical design requirements, and meets: each lens are relative to pressure ring three outwardly convex.
Preferably, described supplementary lens is arranged in the groove of case nose, pressure ring one fix.
Preferably, described second lens unit is mounted on enclosure by the threaded engagement of stopper and shell.
Preferably, described rearmounted lens are arranged in the groove of stopper, pressure ring clematis stem cross screw and fix.
Preferably, the through hole on described pressure ring two and pressure ring four is located at the same side, and relative with the groove being located on housing interior side-wall, constitutes the passage of described optical liquid one.
Preferably, the through hole on described pressure ring three is relative with the through hole being located on shell, constitutes the passage of described optical liquid two.
Compared with prior art, there is advantages that
First, in the present invention, initial curvature radius and the thickness of transparent elastic lens front and rear surfaces are design variable, can be optimized calculating according to optical design requirements；Have employed four transparent elastic lens altogether, can be that optical design is additionally provided 12 design freedoms.
Secondly, in the present invention, transparent elastic lens front and rear surfaces is parabola；Using aspheric surface can effectively reduce primary aberration, improve image quality further, meanwhile, parabola not only conforms with actual deformation, it is possible to obtains comparatively ideal result, and is easy to processing.
Again, battery of lens in the present invention is made up of supplementary lens, rearmounted lens and four transparent elastic lens, and field stop is placed on the central area of whole zoom lens, and zoom lens design becomes symmetrical expression optical texture, can effectively reduce off-axis aberration, improve image quality.
The zoom lens of the present invention, it is possible to continuous vari-focus in the zooming range of real currently designed requirement, have the advantages such as volume is little, image quality is high, optical axis stable, easy to operate, easy processing, can be widely applied to various modern imaging system.
Accompanying drawing explanation
Fig. 1 is the overall structure schematic diagram of an embodiment of the zoom lens of the present invention；
Fig. 2 is the overall 3D explosive view of embodiment in Fig. 1；
Fig. 3 is the overall structure sectional view of embodiment in Fig. 1；
Fig. 4 is left view and the sectional view of the shell of embodiment in Fig. 1；
Fig. 5 is the front view of pressure ring two, left view and the sectional view of embodiment in Fig. 1；
Fig. 6 is the front view of pressure ring three, left view and the sectional view of embodiment in Fig. 1；
Fig. 7 is the front view of pressure ring four, left view and the sectional view of embodiment in Fig. 1；
Fig. 8 is the structural representation of the supplementary lens of embodiment in Fig. 1；
Fig. 9 is the structural representation of the rearmounted lens of embodiment in Fig. 1；
Figure 10 is the structural representation of the lens one of embodiment in Fig. 1；
Description of reference numerals: 1-supplementary lens；2-lens one；3-lens two；4-lens three；5-lens four；The rearmounted lens of 6-；7-screw；8-stopper；9-shell；10-pressure ring one；11-pressure ring two；12-pressure ring three；13-pressure ring four；14-pressure ring five；15-pressure ring six；16-plunger one；17-plunger two；18-optical liquid one；19-optical liquid two.
Detailed description of the invention
In order to be further appreciated by the present invention, below in conjunction with embodiment, the preferred embodiment of the invention is described, but it is to be understood that these describe simply as further illustrating the features and advantages of the present invention rather than limiting to the claimed invention.
Below by drawings and Examples, technical scheme is described in further detail.
As shown in Figures 1 to 10, in one embodiment of the invention, a kind of Prosthetic Hand crystalline lens layer structure symmetrical expression zoom lens are made up of shell 9, pressure ring 1, pressure ring 2 11, pressure ring 3 12, pressure ring 4 13, pressure ring 5 14, pressure ring 6 15, stopper, plunger 1, plunger 2 17, supplementary lens 1, rearmounted lens 6, lens 1, lens 23, lens 34, lens 45 and optical liquid 1 and optical liquid 2 19.Wherein, supplementary lens 1 is as the first lens unit of zoom lens.Lens 1, lens 23, lens 34, lens 45, optical liquid 1 and optical liquid 2 19 are as the second lens unit of zoom lens, the layer structure of simulation human lens.Pressure ring 3 12 flash trimming edge is outside mounting portion, and the core of very thin thickness, as the field stop of these zoom lens, is arranged between lens 23 and lens 34, is in the center of zoom lens the second lens unit.Rearmounted lens 6 are as the 3rd lens unit of zoom lens.Thus constitute whole symmetrical expression zoom lens.
As shown in Figures 2 and 3, supplementary lens 1 is arranged in the groove of shell 9 front end, pressure ring 1 fix；Successively toward mounted lens 1, pressure ring 2 11, lens elastomeric lenses 2, pressure ring 3 12, lens 34, pressure ring 4 13, lens 45, pressure ring 5 14 in shell 9, by stopper 8 and the threaded engagement of shell 9, it is fixed installed above at the parts within shell 9；Rearmounted lens 6 are arranged in the groove of stopper 8, pressure ring 6 15 fixed by screw；Pressure ring 2 11 and pressure ring 4 13 all have a through hole in the same side, relative with the groove on shell 9 medial wall；There is a through hole side of pressure ring 3 12, relative with another through hole of shell 9.Optical liquid 1 it is full of in plunger 1, the through hole connection relative with shell 9 medial wall groove, the most just the through hole with pressure ring 2 11 and pressure ring 4 13 connects, and optical liquid 1 will be filled with the first annular seal space formed by lens 1, pressure ring 2 11, lens 23 and the 3rd annular seal space formed by lens 34, pressure ring 4 13, lens 45；Being full of optical liquid 2 19 in plunger 2 17, connect with another through hole of shell 9, the most just the through hole with pressure ring 3 12 connects, and optical liquid 2 19 will be filled with the second annular seal space formed by lens 23, pressure ring 3 12, lens 34.
As shown in Figure 4, on the left of shell 9, there is female thread, coordinate with the external screw thread of stopper 8, be used for fixing and locking.A reserved groove inside shell 9, the heart has a through hole to connect with plunger 1 in a groove.Shell 9 opposite side also has a through hole, connects with plunger 2 17.
As shown in figure 5 and figure 7, pressure ring 2 11 and pressure ring 4 13 have a through hole in the same side, relative with the groove inside shell 9, it is ensured that plunger 1 can be connected with the through hole of pressure ring 2 11 and pressure ring 4 13 by the through hole on shell 9 and groove.As shown in Figure 6, having a through hole outside pressure ring 3 12, there are two through holes inner side, and its center diametrically, and connects inside pressure ring, it is ensured that plunger 2 17 all can be connected with two through holes inside pressure ring 3 12 by another through hole on shell 9.
Being full of deionized water in plunger 1, its refractive index is Nq1=1.333；Being full of ethyl silicon oil in plunger 2 17, its refractive index is Nq2=1.438；Meet condition: Nq1<Nq2.Lens 1, lens 23, lens 34 and lens 45 all use solidification PDMS material, and its refractive index is Ns=1.404, meets condition: Nq1<Ns<Nq2.Solidification PDMS material is formed by PDMS solution and firming agent mixing crosslinking curing, and mixed proportion uses 1:20.
Plunger 1 connects with relative to the through hole of shell 9 medial wall groove, the most just the through hole with pressure ring 2 11 and pressure ring 4 13 connects, and deionized water will be filled with the first annular seal space formed by lens 1, pressure ring 2 11, lens 23 and the 3rd annular seal space formed by lens 34, pressure ring 4 13, lens 45；Plunger 2 17 connects with another through hole of shell 9, and the most just the through hole with pressure ring 3 12 connects, and ethyl silicon oil will be filled with the second annular seal space formed by lens 23, pressure ring 3 12, lens 34.Its operation principle is as follows: when plunger 1 is toward injection deionized water in closed containing cavity, lens 1 and lens 45 will expand outward, deform upon, and now focal length diminishes；When plunger 2 17 is toward injection ethyl silicon oil in closed containing cavity, first the liquid volume of increase acts on lens 23 and lens 34 so that it is expands outward, deforms upon；Because lens 23 and lens 34 expand outward, so lens 1 and lens 45 also will expand outward, deforming upon, now focal length diminishes.Otherwise, when plunger 1 extracts deionized water out in closed containing cavity, lens 1 and lens 45 bounce back inward, deform upon, and now focal length becomes big；When plunger 2 17 extracts ethyl silicon oil out in closed containing cavity, because liquid volume reduces, lens 23 and lens 34 bounce back inward, deform upon；Because lens 23 and lens 34 bounce back inward, so lens 1 and lens 45 also will bounce back inward, deforming upon, now focal length becomes big.By the independence of two plungers is controlled, it is possible to continuous vari-focus in the zooming range that design requires.
The explanation of above example is only intended to help to understand method and the core concept thereof of the present invention.It should be pointed out that, for those skilled in the art, under the premise without departing from the principles of the invention, it is also possible to the present invention is carried out some improvement and modification, these improve and modify in the protection domain also falling into the claims in the present invention.
Claims (8)
1. Prosthetic Hand crystalline lens layer structure symmetrical expression zoom lens, the first lens unit of including shell and being located in shell, the second lens unit, the 3rd lens unit, and stick harness one and stick harness two, described first lens unit includes supplementary lens (1), described 3rd lens unit includes rearmounted lens (6), it is characterised in that:
Described second lens unit includes pressure ring one (10), lens one (2), pressure ring two (11), lens two (3), pressure ring three (12), lens three (4), pressure ring four (13), lens four (5) and pressure ring five (14) successively, wherein, lens one (2), lens two (3), lens three (4), lens four (5) are transparent elastic lens；Described lens one (2), lens two (3) and pressure ring two (11) constitute the first annular seal space, described lens two (3), lens three (4) and pressure ring three (12) constitute the second annular seal space, described lens three (4), lens four (5) and pressure ring four (13) constitute the 3rd annular seal space, described first annular seal space and the 3rd annular seal space are respectively by being located at the through hole on pressure ring two (11) and pressure ring four (13) and the channel connection stick harness one (16) on shell, described second annular seal space is by being located at the through hole on pressure ring three (12) and the channel connection stick harness on shell two (17)；Being provided with diaphragm in described pressure ring three (12), described diaphragm is positioned at the center of the second lens unit, as the field stop of described zoom lens；
Filling optical liquid one (18) in described stick harness one (16), described optical liquid one (18) passes through into or out described first annular seal space of piston effect and the 3rd annular seal space of stick harness one (16)；Optical liquid two (19), the described optical liquid two (19) into or out described second annular seal space of piston effect by stick harness two (17) is filled in described stick harness two (17).
Prosthetic Hand crystalline lens layer structure symmetrical expression zoom lens the most according to claim 1, it is characterised in that: described optical liquid one (18) and optical liquid two (19) have different refractive indexs, meet condition: Nq1<Nq2, wherein Nq1It is the refractive index of optical liquid one (18), Nq2It it is the refractive index of optical liquid two (19)；Described lens one (2), lens two (3), lens three (4), lens four (5) use commaterial to make, and have identical refractive index Ns, and meet condition: Nq1<Ns<Nq2。
Prosthetic Hand crystalline lens layer structure symmetrical expression zoom lens the most according to claim 2, it is characterized in that: before and after described lens one (2), lens two (3), lens three (4), lens four (5), surface is parabola, each paraboloidal shape and edge thickness are optimized calculating according to optical design requirements, and meet: each lens are relative to pressure ring three (12) outwardly convex.
4. according to the Prosthetic Hand crystalline lens layer structure symmetrical expression zoom lens described in any one of claim 1-3, it is characterised in that: described supplementary lens (1) is arranged in the groove of shell (9) front end, pressure ring one (10) fix.
Prosthetic Hand crystalline lens layer structure symmetrical expression zoom lens the most according to claim 4, it is characterised in that: it is internal that described second lens unit is mounted on shell (9) by the threaded engagement of stopper (8) and shell (9).
Prosthetic Hand crystalline lens layer structure symmetrical expression zoom lens the most according to claim 5, it is characterised in that: described rearmounted lens (6) are arranged in the groove of stopper (8), pressure ring six (15) fixed by screw.
7. according to the Prosthetic Hand crystalline lens layer structure symmetrical expression zoom lens described in claim 5 or 6, it is characterized in that: the through hole on described pressure ring two (11) and pressure ring four (13) is located at the same side, and relative with the groove being located on shell (9) medial wall, constitute the passage of described optical liquid one (18).
Prosthetic Hand crystalline lens layer structure symmetrical expression zoom lens the most according to claim 7, it is characterised in that: the through hole on described pressure ring three (12) is relative with the through hole being located on shell (9), constitutes the passage of described optical liquid two (19).
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| CN201510932318.8A CN105842840B (en) | 2015-12-15 | 2015-12-15 | Imitative crystalline lens layer structure symmetrical expression zoom lens |
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| CN201510932318.8A CN105842840B (en) | 2015-12-15 | 2015-12-15 | Imitative crystalline lens layer structure symmetrical expression zoom lens |
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Cited By (8)
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| CN106990459A (en) * | 2017-05-09 | 2017-07-28 | 宁波大学 | A kind of flexible adjustable lens and variable-power optical system with sandwich construction |
| CN109839713A (en) * | 2017-11-29 | 2019-06-04 | 宁波舜宇光电信息有限公司 | A kind of variable focus package, lens assembly and camera module |
| CN110187418A (en) * | 2019-06-12 | 2019-08-30 | 北京理工大学 | Liquid film lens combination varifocal optical system |
| WO2019214278A1 (en) * | 2018-05-09 | 2019-11-14 | 深圳光峰科技股份有限公司 | Fixing structure for optical element, lens assembly and illuminance detection device |
| WO2020051758A1 (en) * | 2018-09-11 | 2020-03-19 | 温州医科大学 | Model eye for fundus imaging system test |
| CN111552070A (en) * | 2020-04-20 | 2020-08-18 | 宁波大学 | Bionic flexible mobile optical imaging device |
| CN112433275A (en) * | 2020-12-04 | 2021-03-02 | 中国人民解放军国防科技大学 | Electromagnetic drive liquid state optical focusing lens based on annular coil |
| EP3474065B1 (en) * | 2017-10-19 | 2021-04-21 | Mitutoyo Corporation | Variable focal length lens apparatus |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106990459A (en) * | 2017-05-09 | 2017-07-28 | 宁波大学 | A kind of flexible adjustable lens and variable-power optical system with sandwich construction |
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| WO2020051758A1 (en) * | 2018-09-11 | 2020-03-19 | 温州医科大学 | Model eye for fundus imaging system test |
| CN110187418A (en) * | 2019-06-12 | 2019-08-30 | 北京理工大学 | Liquid film lens combination varifocal optical system |
| CN111552070A (en) * | 2020-04-20 | 2020-08-18 | 宁波大学 | Bionic flexible mobile optical imaging device |
| CN111552070B (en) * | 2020-04-20 | 2021-11-23 | 宁波大学 | Bionic flexible mobile optical imaging device |
| CN112433275A (en) * | 2020-12-04 | 2021-03-02 | 中国人民解放军国防科技大学 | Electromagnetic drive liquid state optical focusing lens based on annular coil |
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