CN114236652A - Electromagnetic drive zooming deflection liquid lens - Google Patents
Electromagnetic drive zooming deflection liquid lens Download PDFInfo
- Publication number
- CN114236652A CN114236652A CN202111516777.XA CN202111516777A CN114236652A CN 114236652 A CN114236652 A CN 114236652A CN 202111516777 A CN202111516777 A CN 202111516777A CN 114236652 A CN114236652 A CN 114236652A
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- liquid
- lens
- liquid lens
- thin plate
- deflection
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- 239000007788 liquid Substances 0.000 title claims abstract description 96
- 239000005357 flat glass Substances 0.000 claims abstract description 7
- 230000003287 optical effect Effects 0.000 abstract description 9
- 230000000694 effects Effects 0.000 abstract description 5
- 230000008859 change Effects 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 5
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 5
- 239000004926 polymethyl methacrylate Substances 0.000 description 5
- 229910001172 neodymium magnet Inorganic materials 0.000 description 4
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 241000282414 Homo sapiens Species 0.000 description 1
- 229910052779 Neodymium Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- QEFYFXOXNSNQGX-UHFFFAOYSA-N neodymium atom Chemical compound [Nd] QEFYFXOXNSNQGX-UHFFFAOYSA-N 0.000 description 1
- 229920002545 silicone oil Polymers 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- 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
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Mechanical Light Control Or Optical Switches (AREA)
Abstract
The invention discloses an electromagnetic drive zooming deflection liquid lens, which comprises: the device comprises window glass, a cylindrical support frame, a magnetic ring, an annular thin plate, a limiting ring, a magnet, a driver, a drive control device, filling liquid I, filling liquid II and a liquid-liquid level; the technical key points of the invention are as follows: the curvature of the liquid-liquid surface used by the system can be changed when the driving device works, so that the field deflection can be realized, and the zooming can be realized quickly and continuously; the invention fills two immiscible liquids with matched density in the cavity, and has similar two-phase stable structure. The interface between the two kinds of liquid is the interface of light deflection in the lens, and the annular thin plate fixed in the middle of the liquid lens can move up and down to change the focal power of the liquid lens. The inclination of the annular thin plate is controlled by an electromagnetic driver, so that the liquid-liquid level optical axis is deflected, and the effect of field deflection is achieved. Compared with the traditional liquid lens, the invention has larger focal power and field range, and simplifies the system structure.
Description
Technical Field
The present invention relates to a liquid lens, and more particularly, to an electromagnetically driven variable focus deflection liquid lens.
Background
Since the 21 st century, optical lenses including lenses have become important components in the fields of image acquisition, information display, and the like. The optical lens greatly expands the observation range of human beings and is widely applied to the aspects of biomedicine, astronomical observation, geodetic survey, military affairs and the like. With the development of science and technology, the structure of the optical lens is continuously updated in an iterative manner, and the optical lens is developed towards miniaturization and light weight. In recent years, the lens formed by the liquid lens overcomes the inherent defects of the traditional solid lens by the advantages of simple structure, low power consumption, low cost and the like, and can efficiently adjust the focal length by changing the curvature of the liquid level, so that the lens has more compact structure, simpler zooming and higher efficiency, and the liquid lens becomes a new direction for developing lens components.
Currently, conventional liquid lenses are relatively small in power and therefore have a relatively small field of view. One technical approach to achieve a larger field of view is to use a combination of liquid prisms and liquid lenses to deflect the field of view, however this approach makes the system more bulky and the drive more complex. Thus, there remains a need for a liquid lens that increases the field of view.
Disclosure of Invention
The invention provides an electromagnetic drive zoom deflection liquid lens, as shown in the attached fig. 1 and 2, comprising: window glass, cylindrical support frame, magnetic ring, annular sheet metal, spacing ring, magnet, driver, drive control device, filling liquid I, filling liquid II, liquid-liquid level.
The working principle of the invention is shown in figure 3, and the cavity of the electromagnetic driving zooming deflection liquid lens consists of a cylindrical support frame, a magnetic ring, an annular thin plate and window glass. In the cavity, the annular thin plate can move up and down, and a neodymium magnet ring is fixed on the outer ring of the annular thin plate. The cavity is filled with two liquids with the same density, which are respectively called as a filling liquid I and a filling liquid II, and the two liquids are mutually insoluble and have the same density and have similar two-phase stable structures. The interface between the two liquids (liquid-liquid level) is located at the circular hole of the annular thin plate and is also the interface where the light deflection occurs in the lens. The annular thin plate fixed in the middle of the liquid lens can move up and down to change the focal power of the liquid lens, and the central aperture of the annular thin plate is the clear aperture of the liquid lens. The driving force for driving the annular thin plate to move up and down comes from magnetic force generated by interaction of a magnetic field generated by the magnet and a neodymium magnetic ring fixed on the outer ring of the annular thin plate, and the driving control device sends out an instruction to move up and down through the driver to change the position of the magnet, so that the annular thin plate can move up and down. By controlling the position of the actuators not to be at the same heightThe annular thin plate can be inclined at a certain angle, under the action of magnetic force, the annular thin plate can overcome liquid resistance and friction force to move, the driver is positioned at the lower side, and the filling liquid II on the upper part of the cavity is extruded downwards; the actuator is positioned higher and the filling liquid i in the lower part of the chamber will be pressed upwards. The part of the filling liquid II on the liquid lens cavity is extruded and redistributed, the liquid-liquid interface can be inclined along with the extrusion, and further the optical axis of the liquid lens is inclined, so that the effect of field deflection is achieved, the deflection angle of the optical axis is related to the height difference of the drivers on the two sides, the larger the height difference is, the larger the inclination angle of the optical axis is, as shown in the attached figure 4. In the initial state, if filled with liquid I
Refractive index less than that of the filling liquid II
Then the liquid lens will diverge the beam with negative power as shown in figure 3. When the two-side driver position is controlled to move upwards from the initial state at the same height, the part of the filling liquid II on the liquid lens cavity is squeezed and redistributed. When the liquid is redistributed, because the gap between the edge of the annular thin plate and the inner wall of the support frame is very small, and the volume substitution between the two liquids is not large, the filling liquid II on the upper part of the cavity at the central circular hole of the circular ring is extruded downwards, so that the liquid-liquid interface is deformed. When the liquid-liquid interface is horizontal, light rays vertically pass through the liquid-liquid interface without deflection, and the focal power of the liquid lens is zero at the moment, as shown in figure 5; when the liquid-liquid interface is deformed to a concave surface, the liquid lens power is positive as shown in fig. 6.
Preferably, the fill fluid I and fill fluid II are immiscible, density matched and have a refractive index difference.
Preferably, the magnetic ring and the annular thin plate are driven together, and the driving mode is electromagnetic driving.
Preferably, the up-and-down movement distance L of the magnetic ring and the annular thin plate is more than or equal to 5mm and less than or equal to 10 mm.
Preferably, the caliber D of the electromagnetic drive zoom deflection liquid lens is more than or equal to 4mm, and D is less than or equal to 30 mm.
Drawings
FIG. 1 is a schematic sectional front view of an electromagnetically actuated variable focus deflection liquid lens according to the present invention.
FIG. 2 is a schematic top sectional view of an electromagnetically driven variable focus liquid lens according to the present invention.
FIG. 3 is a schematic diagram of the operation of the electromagnetic driving zoom deflection liquid lens of the present invention.
FIG. 4 is a schematic view of the field deflection of the electromagnetic driving zoom liquid lens according to the present invention.
FIG. 5 is a schematic diagram of zero power of the electromagnetic driving zoom deflection liquid lens of the present invention.
FIG. 6 is a schematic diagram of the positive power of the electromagnetic driving zoom deflection liquid lens of the present invention.
FIG. 7 is a diagram illustrating the relationship between the tilt angle of the liquid-liquid interface of the electromagnetically driven zoom-deflected liquid lens and the voltage.
FIG. 8 is a diagram illustrating the relationship between the focal length and the voltage of the electromagnetically driven zoom deflecting liquid lens in the embodiment.
The reference numbers in the figures are:
1 window glass, 2 cylindrical supports, 3 magnetic rings, 4 annular sheets, 5 spacing rings, 6 magnets, 7 drivers, 8 drive control devices, 9 filling liquid I, 10 filling liquid II and 11 liquid-liquid levels.
Detailed Description
The present invention will be further described in detail by describing an embodiment of an electromagnetically driven variable-focus deflecting liquid lens according to the present invention in detail. It should be noted that the following examples are only for illustrative purposes and should not be construed as limiting the scope of the present invention, and that the skilled person in the art may make modifications and adaptations of the present invention without departing from the scope of the present invention.
One embodiment of the invention is:
as shown in fig. 1, the electromagnetically driven variable focus deflection liquid lens includes: window glass, cylindrical support frame, magnetic ring, annular sheet metal, spacing ring, magnet, driver, drive control device, filling liquid I, filling liquid II, liquid-liquid level.
As shown in figure 4, the zooming deflection liquid lens uses an electromagnetic driver to control the inclination of the annular thin plate, so that the optical axis of the liquid-liquid surface is deflected, and the effect of field deflection is achieved.
The electromagnetic drive zoom deflection liquid lens uses a PMMA (polymethyl methacrylate) cylindrical tube with the length of 18 mm as a support frame of the liquid lens, the wall thickness of the PMMA cylindrical tube is 1 mm, and the inner caliber of the PMMA cylindrical tube is 20 mm. The annular PMMA sheet has an outer diameter of 18 mm and an inner diameter of 16 mm. The annular neodymium magnet is driven by a magnetic field generated by an electromagnet, and the outer diameter of the annular neodymium magnet is 20 mm, and the inner diameter of the annular neodymium magnet is 18 mm. The filling liquid I is NaCl solution with the refractive index of 1.38 and the Abbe number of 55.8, and the filling liquid II is silicone oil with the refractive index of 1.50 and the Abbe number of 38.
The working waveband adopted by the embodiment is 380nm-770nm, and the driver adopts an electromagnet. When voltage is applied to the invention, the liquid-liquid interface of the lens is inclined to achieve the effect of field deflection, the curvature is changed along with the inclination, the change of the focal length is caused, and the effect of continuous zooming of field deflection can be realized. When the opposite voltage 0V to 20V is applied to the two sides of the driver at the same time, the inclination angle of the liquid-liquid interface of the lens changes as shown in FIG. 7; when the same voltage is applied to both sides of the driver at the same time and the voltage is changed from 0V to 60V, the focal length of the lens is changed as shown in FIG. 8. It should be noted that the driving voltage of the lens in the embodiment of the present invention is 6V, so that the tilt angle and the focal length of the liquid-liquid interface are not changed when the voltage is 0-6V.
Claims (5)
1. An electromagnetically driven variable focus deflecting liquid lens comprising: the liquid lens comprises window glass, a cylindrical support frame, a magnetic ring, an annular thin plate, a limiting ring, a magnet, a driver, a drive control device, filling liquid I, filling liquid II and a liquid-liquid level.
2. An electromagnetically driven variable focus deflecting liquid lens according to claim 1, wherein the filling liquid i and the filling liquid ii are immiscible, density matched and have a refractive index difference.
3. An electromagnetically driven variable focus deflecting liquid lens as claimed in claim 1, wherein the magnetic ring and the annular thin plate are driven together and the driving mode is electromagnetically driven.
4. The liquid lens as claimed in claim 1, wherein the distance L between the magnetic ring and the annular thin plate is not less than 5mm and not more than 10 mm.
5. The liquid lens with electromagnetic driving and zooming in and out of claim 1, wherein the aperture D of the liquid lens with electromagnetic driving and zooming in and out is not less than 4mm and not more than 30 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111516777.XA CN114236652A (en) | 2021-12-13 | 2021-12-13 | Electromagnetic drive zooming deflection liquid lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111516777.XA CN114236652A (en) | 2021-12-13 | 2021-12-13 | Electromagnetic drive zooming deflection liquid lens |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114236652A true CN114236652A (en) | 2022-03-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111516777.XA Pending CN114236652A (en) | 2021-12-13 | 2021-12-13 | Electromagnetic drive zooming deflection liquid lens |
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| CN (1) | CN114236652A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090116118A1 (en) * | 2005-06-21 | 2009-05-07 | Global Bionic Optics Pty Ltd | Lens |
| US20130114148A1 (en) * | 2010-06-02 | 2013-05-09 | Optotune Ag | Adjustable optical lens |
| CN103607942A (en) * | 2011-04-08 | 2014-02-26 | 卡尔斯特里姆保健公司 | Intra oral camera having a liquid lens for image stabilization |
| CN110609377A (en) * | 2019-10-14 | 2019-12-24 | Oppo广东移动通信有限公司 | Lens group, camera module and electronic equipment |
-
2021
- 2021-12-13 CN CN202111516777.XA patent/CN114236652A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090116118A1 (en) * | 2005-06-21 | 2009-05-07 | Global Bionic Optics Pty Ltd | Lens |
| US20130114148A1 (en) * | 2010-06-02 | 2013-05-09 | Optotune Ag | Adjustable optical lens |
| CN103607942A (en) * | 2011-04-08 | 2014-02-26 | 卡尔斯特里姆保健公司 | Intra oral camera having a liquid lens for image stabilization |
| CN110609377A (en) * | 2019-10-14 | 2019-12-24 | Oppo广东移动通信有限公司 | Lens group, camera module and electronic equipment |
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| PB01 | Publication | ||
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Application publication date: 20220325 |
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| RJ01 | Rejection of invention patent application after publication |