CN110806610B - Aberration correction zoom lens - Google Patents
Aberration correction zoom lens Download PDFInfo
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- CN110806610B CN110806610B CN201911137065.XA CN201911137065A CN110806610B CN 110806610 B CN110806610 B CN 110806610B CN 201911137065 A CN201911137065 A CN 201911137065A CN 110806610 B CN110806610 B CN 110806610B
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- G02B3/14—Fluid-filled or evacuated lenses of variable focal length
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Abstract
An aberration correction zoom lens comprises an annular piezoelectric driving layer, a thin transmission deformation layer, a liquid medium, an annular fixed supporting structure, rigid plane glass, a soft elastic film, an anti-reflection film and a servo driving mechanism; the annular piezoelectric driving layer is fixed on the outer side surface of the thin transmission deformation layer, the inner side surface of the thin transmission deformation layer is fixed on one end surface of the annular fixed supporting structure, the soft elastic film is fixed inside the lower end of the annular fixed supporting structure, and the sealed inner cavity is filled with a colorless liquid medium with high transmittance; the servo driving mechanism is fixed at the other end of the annular fixed supporting structure; the area fixed by the annular piezoelectric driving layer is arranged in the center of the outer side of the thin transmission deformation layer and is plated with an antireflection film, the area plated with the antireflection film and the area covered by the annular gasket in the middle of the flexible elastic film are working areas of the zoom lens, and the middle of the servo driving mechanism is a light passing area. The invention is used for optical zoom imaging.
Description
Technical Field
The invention belongs to the field of optical devices, and relates to an aberration correction zoom lens.
Background
The traditional optical zoom imaging system is a combination of a series of lenses made of transparent substances such as resin or glass with fixed focal length, has the defects of complex structure, heavy volume, serious mechanical abrasion, high processing difficulty and the like, and can not meet the requirements of intelligent optical equipment on automatic, intelligent and miniature optical zoom systems. The flexible zoom lens is only composed of a zoom lens and has attracted wide attention of scholars at home and abroad, the flexible zoom lens is generally composed of a transparent elastic film, a transparent fluid medium and the like, the focal length of an optical system is adjusted by changing the curvature radius of the surface of the transparent elastic film, great success is achieved, but the aberration is introduced due to the existence of the gravity of the transparent fluid medium and uneven distribution of the medium, and the imaging effect is greatly influenced.
Disclosure of Invention
The invention provides a zoom lens with an aberration correction function to overcome the defects of the prior art. The zoom lens can effectively correct aberration and other common optical aberration caused by the self gravity of liquid and uneven distribution of media, and further improves the quality of an imaging system.
The technical scheme of the invention is as follows:
an aberration correction zoom lens comprises an annular piezoelectric driving layer, a thin transmission deformation layer, a liquid medium, an annular fixed supporting structure, rigid plane glass, a soft elastic film, an antireflection film and a servo driving mechanism;
the annular piezoelectric driving layer is fixed on the outer side surface of the thin transmission deformation layer, the inner side surface of the thin transmission deformation layer is fixed on one end surface of the annular fixed supporting structure, the soft elastic film is fixed inside the lower end of the annular fixed supporting structure, the thin transmission deformation layer, the soft elastic film and the annular fixed supporting structure enclose a closed inner cavity, a colorless liquid medium with high transmittance is filled in the closed inner cavity, and the rigid plane glass is embedded inside the annular fixed supporting structure to isolate the inner cavity from forming two cavities filled with the liquid medium; the servo driving mechanism is fixed at the other end of the annular fixed supporting structure, and the output end of the servo driving mechanism is fixedly connected with one side face of the annular gasket; the other side surface of the annular gasket is positioned below the outer side surface of the soft elastic film, and the curvature radius of the soft elastic film is changed under the extrusion of the annular gasket driven by the servo driving mechanism;
an anti-reflection film is plated in an area fixed by the annular piezoelectric driving layer in the center of the outer side of the thin transmission deformation layer, the area plated with the anti-reflection film and an area covered by the annular gasket in the middle of the soft elastic film are working areas of the zoom lens, and the middle of the servo driving mechanism is a light passing area.
Compared with the prior art, the invention has the beneficial effects that:
the aberration correction zoom lens can realize large-range adjustable focal length, the whole inner cavity is divided into two independent chambers by the rigid plane glass, the surface curvature radius of the flexible elastic film is changed under the extrusion of the annular gasket, and the surface shape of the flexible elastic film can be changed by controlling the servo driving mechanism, so that the focal length of the lens is changed. Through introducing many actuator self-adaptation structures based on single piezoelectric drive, can effectively rectify again and arouse aberration and other common optical aberration by filling liquid self gravity and medium distribution inequality effect, further promote imaging system quality.
Drawings
FIG. 1 is a schematic view of a zoom lens with aberration correction function according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of adjusting the focal length of a zoom lens with aberration correction function according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of aberration correction of a zoom lens with aberration correction function according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of low order aberrations.
In the figure, 1, an annular piezoelectric driving layer, 2, a discrete multi-ring fan-shaped array electrode layer, 3, a piezoelectric ceramic sheet, 4, an annular electrode layer, 5, a thin transmission deformation layer, 6, an annular fixed supporting structure, 7, a liquid medium, 8, rigid plane glass, 9, a soft elastic film, 10, an annular gasket, A11, a voice coil motor push rod, A12, an annular voice coil motor, 13 and an antireflection film.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the embodiments described below are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. The direction indicated by the hollow arrow in fig. 1-3 is the beam direction.
Referring to fig. 1, an aberration correcting zoom lens includes an annular piezoelectric driving layer 1, a thin transmission deformation layer 5, a liquid medium 7, an annular fixed support structure 6, rigid flat glass 8, a soft elastic film 9, an antireflection film 13, and a servo driving mechanism a;
the annular piezoelectric driving layer 1 is fixed on the outer side surface of the thin transmission deformation layer 5, the inner side surface of the thin transmission deformation layer 5 is fixed on one end surface of the annular fixed supporting structure 6, the soft elastic film 9 is fixed in the lower end of the annular fixed supporting structure 6, the annular piezoelectric driving layer 1, the soft elastic film 9 and the annular fixed supporting structure 6 enclose a closed inner cavity, the closed inner cavity is filled with a colorless liquid medium 7 with high transmittance, and the rigid plane glass 8 is embedded in the annular fixed supporting structure 6 to isolate the inner cavity to form two cavities filled with the liquid medium 7; the servo driving mechanism A is fixed at the other end of the annular fixed supporting structure 6, and the output end of the servo driving mechanism A is fixedly connected with one side face of the annular gasket 10; the other side surface of the annular gasket 10 is positioned below the outer side surface of the flexible elastic film 9, and the curvature radius of the flexible elastic film 9 is changed under the extrusion of the annular gasket 10 driven by the servo driving mechanism A;
an anti-reflection film 13 is plated in an area fixed by the annular piezoelectric driving layer 1 in the center of the outer side of the thin transmission deformation layer 5, the area plated with the anti-reflection film 13 and an area covered by the annular gasket 10 in the middle of the flexible elastic film 9 are working areas of the zoom lens, and the middle of the servo driving mechanism A is a light passing area. The antireflection film 13 is a film for enhancing the light beam transmittance, so that the light energy loss is caused by the reflection action of the element surface, and in order to reduce the reflection loss of the element surface, a transparent dielectric film is usually coated on the surface of the optical element, and this film is called an antireflection film, and the antireflection film is generally coated with magnesium fluoride.
In the above-mentioned embodiment, as an optimal solution, annular piezoelectric driving layer 1 includes ring shape piezoceramics piece 3, many ring sector array electrode layer 2 and annular electrode layer 4, the electrode layer that one side of ring shape piezoceramics piece 3 covered is the annular electrode layer 4 with the piezoceramics piece same shape, and the electrode layer that the opposite side covered is many ring sector array electrode layer 2 of separating, the electrode layer is silver or aluminium metal electrode layer, 4 rigid couplings of annular electrode layer are in the outside of thin transmission deformation layer 5.
Preferably, the annular electrode layer 4 can be bonded to the thin transmission deformation layer 5 by epoxy resin adhesive, further, as shown in fig. 3, the piezoelectric ceramic sheet 3 of the annular piezoelectric driving layer 1 is deformed after being applied with voltage, the thin transmission deformation layer 5 is bent due to the boundary supporting effect, so as to extrude the deformable high-transmittance liquid medium 7 to deform, so that the passing light beam generates an optical path difference, the middle working area generates a specific surface type, the light beam sequentially passes through two cavities filled with the high-transmittance colorless liquid medium 7, and various low-order aberrations are corrected due to the optical path difference. By introducing the multi-actuator self-adaptive lens correction system based on the single-piezoelectric drive, the aberration caused by the self gravity of the liquid or the uneven distribution of the liquid medium can be effectively corrected.
As shown in fig. 4, low-order aberrations such as astigmatism (left image), defocus (middle image), coma (right image), and other common optical aberrations can be effectively corrected, and the imaging system can be further improved.
In the above solution, preferably, the thin transmission deformation layer 5 is organic glass. The annular fixed support structure 6 is a quartz glass ring. The liquid medium 7 is deionized water, a sodium chloride solution, mineral oil or an ammonium sulfate solution. The rigid plane glass 8 is transparent resin glass. The flexible elastic film 9 is a PDMS elastic film.
Further, the servo driving mechanism A comprises a cylindrical voice coil motor A12 and a voice coil motor push rod A11; one end of a voice coil motor push rod A11 is fixed on the inner side of the output end of a cylindrical voice coil motor A12, the other end of the voice coil motor push rod A11 is fixedly connected with an annular gasket 10, and the middle of a cylindrical voice coil motor A12 is a hollow cylindrical light passing area.
As shown in fig. 2, the cylindrical voice coil motor a12 drives the voice coil motor push rod a11 to move horizontally by controlling the current of the voice coil motor, the annular gasket 10 connected with the cylindrical voice coil motor a moves along with the cylindrical voice coil motor a, the flexible elastic membrane 9 changes the radius of curvature of the surface under the extrusion of the annular gasket 10, and the surface curvature of the flexible elastic membrane 9 can be changed by controlling the current of the annular voice coil motor 12, so as to change the focal length of the lens, and realize the focal length change in a large range. And the input current is controlled to realize accurate positioning.
The diameter of the area coated with the antireflection film is smaller than the inner diameter of the area covered by the soft elastic film 9 without the annular gasket 10, and the inner diameter of the annular gasket 10 is smaller than the inner diameter of the cylindrical light-passing area of the cylindrical voice coil motor A12. By the arrangement, light beams can effectively pass through the light source in high transmission, and imaging quality is ensured.
Examples
In the above technical solution, the following embodiments are expanded or implemented:
in example 1, the annular piezoelectric driving layer 1 adopts an annular piezoelectric ceramic plate 3 with an inner diameter of 10mm, an outer diameter of 25mm and a thickness of 100 μm, and the upper side and the lower side of the annular piezoelectric driving layer are respectively plated with metal electrode layers (a multi-ring sector array electrode layer 2 and an annular electrode layer 4) made of silver or aluminum with a thickness of 5 μm.
In the embodiment 2, the diameter of the thin transmission deformation layer 5 is 30mm, the thickness is 150 μm, and the material can be made of organic glass. This embodiment is provided as a single embodiment or in combination with embodiment 1.
In example 3, the thickness of the rigid flat glass 8 is 2mm to isolate the inner cavity into two independent chambers, and the thickness of the colorless liquid medium 7 with high transmittance is 5-10 mm. Wherein the rigid plane glass 8 can be made of transparent resin glass, and the liquid medium 7 can be any one of the transparent solutions of deionized water, sodium chloride solution, mineral oil or ammonium sulfate solution. This embodiment is provided as a single embodiment or in combination with embodiments 1 and 2.
In example 4, the flexible elastic film 9 is a PDMS elastic film with a diameter of 18mm and a thickness of 2 mm. The PDMS elastic membrane is fixed in an adhesive manner on the annular fixed support structure 6. This embodiment is provided as a single embodiment or in any combination with embodiments 1, 2 and 3.
In example 5, the annular washer 10 has an inner diameter of 10mm and an outer diameter of 14mm, the annular voice coil motor 12 is a commercially available motor, and the diameter of the inner light-transmitting region is 14 mm. Due to the gravity of the internal liquid medium 7, the PDMS elastic film 9 can generate a convex curved surface, and common optical aberrations such as defocusing or coma are introduced. This example is given as a single example or in any combination with example 4 and examples 1, 2 and 3.
Principle of operation
The zoom lens with the aberration correction function is characterized in that the whole cavity is divided into two independent cavities by the rigid plane glass at the middle part, the PDMS elastic film changes the surface curvature radius of the PDMS elastic film under the extrusion of the annular gasket based on the elastic polymer adjustable lens driven by the annular voice coil motor, and the surface curvature of the PDMS elastic film can be changed by controlling the current of the voice coil motor, so that the focal length of the lens is changed, and the focal length change in a large range is realized. The multi-actuator driven by the annular piezoelectric driving layer generates deformation after voltage is applied to enable the thin transmission deformation layer to bend, so that the deformable transmission medium is extruded to deform, the thickness of the deformable transmission medium is changed to enable the passing light beam to generate optical path difference, the purpose of correcting aberration is achieved, and aberration caused by liquid gravity or liquid medium distribution inequality can be effectively corrected.
The present invention is not limited to the above embodiments, and any simple modification, equivalent change and modification made by the technical essence of the present invention by those skilled in the art can be made without departing from the scope of the present invention.
Claims (6)
1. An aberration-correcting zoom lens characterized in that: the piezoelectric ceramic liquid crystal display panel comprises an annular piezoelectric driving layer (1), a thin transmission deformation layer (5), a liquid medium (7), an annular fixed supporting structure (6), rigid plane glass (8), a soft elastic film (9), an antireflection film (13) and a servo driving mechanism (A);
the piezoelectric thin film type liquid crystal display panel is characterized in that the annular piezoelectric driving layer (1) is fixed on the outer side surface of the thin transmission deformation layer (5), the inner side surface of the thin transmission deformation layer (5) is fixed on one end surface of the annular fixed supporting structure (6), the soft elastic film (9) is fixed in the lower end of the annular fixed supporting structure (6), the annular piezoelectric driving layer (1), the soft elastic film (9) and the annular fixed supporting structure (6) enclose a closed inner cavity, a colorless liquid medium (7) with high transmittance is filled in the closed inner cavity, and the rigid plane glass (8) is embedded in the annular fixed supporting structure (6) to isolate the inner cavity from forming two cavities filled with the liquid medium (7); the servo driving mechanism (A) is fixed at the other end of the annular fixed supporting structure (6), and the output end of the servo driving mechanism (A) is fixedly connected with one side face of the annular gasket (10); the other side surface of the annular gasket (10) is positioned below the outer side surface of the soft elastic film (9), and the curvature radius of the soft elastic film (9) is changed under the extrusion of the annular gasket (10) driven by the servo driving mechanism (A); an anti-reflection film (13) is plated in a region fixed by the annular piezoelectric driving layer (1) in the center of the outer side of the thin transmission deformation layer (5), the region plated with the anti-reflection film (13) and a region covered by the soft elastic film (9) without an annular gasket (10) are working regions of the zoom lens, and the middle of the servo driving mechanism (A) is a light transmission region; the soft elastic film (9) is a PDMS elastic film;
the servo driving mechanism (A) comprises a cylindrical voice coil motor (A12) and a voice coil motor push rod (A11); one end of a voice coil motor push rod (A11) is fixed on the inner side of a moving part of a cylindrical voice coil motor (A12), the other end of the voice coil motor push rod (A11) is fixedly connected with an annular gasket (10), and the middle part of the cylindrical voice coil motor (A12) is a cylindrical light passing area; the cylindrical voice coil motor A12 drives a voice coil motor push rod (A11) and an annular gasket (10) to move horizontally by controlling the current of the voice coil motor, the curvature radius of the surface of a PDMS elastic film extruded by the annular gasket (10) is changed, the focal length of a lens is further changed, the diameter of an area plated with an antireflection film (13) is smaller than the inner diameter of an area of the PDMS elastic film without the annular gasket (10) in the middle, and the inner diameter of the annular gasket (10) is smaller than the inner diameter of a cylindrical light-passing area of the cylindrical voice coil motor (A12).
2. An aberration-correcting zoom lens according to claim 1, characterized in that: annular piezoelectric actuation layer (1) is including ring shape piezoceramics piece (3), many ring fan-shaped array electrode layer (2) and ring electrode layer (4), the electrode layer that one side of ring shape piezoceramics piece (3) covered is ring electrode layer (4) with piezoceramics piece looks isoform, and the electrode layer that the opposite side covered is many ring fan-shaped array electrode layer (2) of separating, the electrode layer is silver-colored or aluminium electrode layer, ring electrode layer (4) rigid coupling is in the outside of thin transmission deformation layer (5).
3. An aberration-correcting zoom lens according to claim 1 or 2, characterized in that: the thin transmission deformation layer (5) is organic glass.
4. An aberration-correcting zoom lens according to claim 3, characterized in that: the annular fixed supporting structure (6) is a quartz glass ring.
5. An aberration-correcting zoom lens according to claim 1, 2 or 4, characterized in that: the liquid medium (7) is deionized water, a sodium chloride solution, mineral oil or an ammonium sulfate solution.
6. The aberration-correcting zoom lens according to claim 5, characterized in that: the rigid plane glass (8) is transparent resin glass.
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| CN111474734B (en) * | 2020-04-13 | 2022-11-22 | 宁波大学 | Wide-range high-frequency-response optical confocal measuring head |
| US20220283340A1 (en) * | 2021-03-05 | 2022-09-08 | Facebook Technologies, Llc | Liquid lens with gravity sag correction |
| CN115166963A (en) * | 2021-04-02 | 2022-10-11 | 宁波舜宇光电信息有限公司 | Variable-focus optical device, lens and camera module |
| CN113820855B (en) * | 2021-08-31 | 2022-07-12 | 华中科技大学 | Design method of electromagnetic drive bidirectional zoom liquid lens |
| CN114609772A (en) * | 2022-03-17 | 2022-06-10 | Oppo广东移动通信有限公司 | Lens, lens module, camera assembly and electronic equipment |
| CN114924336A (en) * | 2022-04-18 | 2022-08-19 | 江苏大学 | Multi-interlayer flexible zoom lens applied to cultural relic exhibition, holographic three-dimensional display system, augmented reality system and method |
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| TWI464480B (en) * | 2011-12-13 | 2014-12-11 | Lin Rou Yu | Variable focus lenses module |
| CN203117444U (en) * | 2013-03-14 | 2013-08-07 | 陈晨 | Variable-focus convex-concave interconverting lens |
| 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 |
| 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 |
| CN209086549U (en) * | 2018-11-19 | 2019-07-09 | 宁波大学 | A kind of transmission-type piezoelectric deforming mirror |
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