CN119165564A - A liquid lens structure and optical system with a large viewing angle - Google Patents
A liquid lens structure and optical system with a large viewing angle Download PDFInfo
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- CN119165564A CN119165564A CN202411188627.4A CN202411188627A CN119165564A CN 119165564 A CN119165564 A CN 119165564A CN 202411188627 A CN202411188627 A CN 202411188627A CN 119165564 A CN119165564 A CN 119165564A
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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
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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
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Abstract
本发明提供一种大视角液体透镜结构及光学系统，涉及光学器件技术领域。所述大视角液体透镜结构包括沿轴线依次设置的第一液体、第二液体和第三液体，所述第二液体与所述第一液体以及所述第三液体不相融；所述第一液体与所述第三液体为绝缘液体，所述第二液体包括离子液体；至少两个第一电极，位于所述第一液体围绕所述轴线的外围；至少一个第二电极，与所述离子液体电连接，被配置为使所述离子液体带电；至少两个第三电极，位于所述第三液体围绕所述轴线的外围。实现了对大视角液体透镜结构的焦距和/或光轴的调整，以及增加了光轴的偏转角度，增加了大视角液体透镜结构的反应速度。
The present invention provides a wide-angle liquid lens structure and an optical system, and relates to the technical field of optical devices. The wide-angle liquid lens structure includes a first liquid, a second liquid, and a third liquid arranged in sequence along an axis, the second liquid is immiscible with the first liquid and the third liquid; the first liquid and the third liquid are insulating liquids, and the second liquid includes an ionic liquid; at least two first electrodes are located on the periphery of the first liquid around the axis; at least one second electrode is electrically connected to the ionic liquid and is configured to charge the ionic liquid; at least two third electrodes are located on the periphery of the third liquid around the axis. The adjustment of the focal length and/or optical axis of the wide-angle liquid lens structure is achieved, and the deflection angle of the optical axis is increased, thereby increasing the reaction speed of the wide-angle liquid lens structure.
Description
Technical Field
The invention relates to the technical field of optical devices, in particular to a large-viewing-angle liquid lens structure and an optical system.
Background
A liquid lens is an optical element made of liquid without mechanical connection, and the internal parameters of the optical element can be changed through external control to realize zooming. The application fields of liquid lenses include image pickup, optical measurement, and the like. Compared with the traditional lens, the liquid lens has the advantages of small volume, quick response, low cost, high integration level and the like.
Most of the existing liquid lenses are variable focal length designs, and the change of the optical axis of the lens can be caused by adopting a multi-electrode design. However, the conventional structural design generally has a limited rotation range of the lens. Meanwhile, due to structural limitation, the appearance of the lens after the optical axis of the lens rotates is larger than that of the lens in a state that the optical axis does not rotate.
Disclosure of Invention
The embodiment of the invention provides a large-viewing-angle liquid lens structure and an optical system, which realize the adjustment of the focal length and/or the optical axis of the large-viewing-angle liquid lens structure, increase the deflection angle of the optical axis and increase the response speed of the large-viewing-angle liquid lens structure.
The first aspect of the invention provides a large-viewing-angle liquid lens structure, which comprises a first liquid, a second liquid and a third liquid which are sequentially arranged along an axis, wherein the second liquid is not compatible with the first liquid and the third liquid, the first liquid and the third liquid are insulating liquids, the second liquid comprises ionic liquids, at least two first electrodes are positioned on the periphery of the first liquid around the axis, at least one second electrode is electrically connected with the ionic liquids and is configured to charge the ionic liquids, and at least two third electrodes are positioned on the periphery of the third liquid around the axis.
In some embodiments of the first aspect of the present invention, the second electrode is located between the first electrode and the third electrode along the extension direction of the axis.
In some embodiments of the first aspect of the present invention, the end of the first electrode away from the second liquid forms a first light-through opening around, the second electrode forms a second light-through opening around the second liquid, the end of the third electrode away from the second liquid forms a third light-through opening around, and the aperture of the first light-through opening is larger than the aperture of the second light-through opening, and/or the aperture of the third light-through opening is larger than the aperture of the second light-through opening.
In some embodiments of the first aspect of the present invention, the aperture of the first light-transmitting port is greater than or equal to the aperture of the third light-transmitting port.
In some embodiments of the first aspect of the present invention, the cross-sectional shape of the first electrode along the plane of the axis includes a first electrode first portion and a first electrode second portion, the first electrode first portion and the first electrode second portion are both straight line segments, and/or the cross-sectional shape of the third electrode along the plane of the axis includes a third electrode first portion and a third electrode second portion, and the third electrode first portion and the third electrode second portion are both straight line segments.
In some embodiments of the first aspect of the present invention, the first electrode and the third electrode are symmetrically disposed about a horizontal reference plane, the horizontal reference plane being perpendicular to the along-axis.
In some embodiments of the first aspect of the present invention, the second electrode includes a first sub-second electrode and a second sub-second electrode disposed opposite to each other.
In some embodiments of the first aspect of the present invention, the at least two first electrodes comprise first sub-first electrodes and second sub-first electrodes arranged opposite each other, and the at least two third electrodes comprise first sub-third electrodes and second sub-third electrodes arranged opposite each other.
In some embodiments of the first aspect of the present invention, at least two of the first electrodes further comprise third and fourth sub-first electrodes disposed opposite each other, the third sub-first electrode being located between the first and second sub-first electrodes in an axial direction about the axis, the fourth sub-first electrode being located between the first and second sub-first electrodes, at least two of the third electrodes further comprising third and fourth sub-third electrodes disposed opposite each other, the third sub-third electrode being located between the first and second sub-third electrodes in a circumferential direction about the axis, the fourth sub-third electrode being located between the first and second sub-third electrodes.
In some embodiments of the first aspect of the present invention, the first liquid and the third liquid each comprise an oily liquid, and the first liquid and the third liquid are the same or different materials.
In some embodiments of the first aspect of the present invention, the large viewing angle liquid lens structure further comprises a dielectric layer surrounding the first liquid, the second liquid, and the third liquid, between the first electrode and the first liquid, between the third electrode and the third liquid.
A second aspect of the present invention provides an optical system comprising a large viewing angle liquid lens structure as described above.
The large-viewing-angle liquid lens structure provided by the embodiment of the invention comprises a first liquid, a second liquid and a third liquid, and at least two first electrodes, at least one second electrode and at least two third electrodes which are adaptive to the first liquid, the second liquid and the third liquid. By adjusting the voltages applied to the first electrode, the second electrode and the third electrode, an adjustment of the focal length and/or the optical axis of the large viewing angle liquid lens structure is achieved. Further, compared with a liquid lens provided with two liquids, the second liquid in the embodiment of the invention can be applied with forces in the upper and lower directions at the same time, so that the deformation degree of the second liquid is increased, and the speed of the second liquid reaching the preset deformation position is increased. Thereby realizing the adjustment of the focal length and/or the optical axis of the large-viewing-angle liquid lens structure, increasing the deflection angle of the optical axis and increasing the reaction speed of the large-viewing-angle liquid lens structure.
Drawings
FIG. 1 is a schematic view of a large-angle liquid lens structure according to an embodiment of the invention;
FIG. 2 is a schematic view illustrating the optical axis deflection of a liquid lens structure with a large viewing angle according to an embodiment of the present invention;
FIG. 3 is a schematic view of another large angle liquid lens structure according to an embodiment of the present invention;
FIG. 4 is a schematic view of another large angle liquid lens structure according to an embodiment of the present invention;
FIG. 5 is a schematic top view of a first electrode according to an embodiment of the invention;
FIG. 6 is a schematic top view of a third electrode according to an embodiment of the invention;
FIG. 7 is an initial schematic view of the optical axis of a large-angle liquid lens structure according to an embodiment of the present invention;
FIG. 8 is a schematic diagram of an optical axis of a large-angle liquid lens structure according to an embodiment of the present invention after adjustment;
FIG. 9 is a schematic top view of another first electrode according to an embodiment of the invention;
fig. 10 is a schematic top view of another third electrode according to an embodiment of the invention.
Detailed Description
The invention is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present invention are shown in the drawings.
Fig. 1 is a schematic view of a large-angle liquid lens structure according to an embodiment of the present invention, and as shown in fig. 1, the large-angle liquid lens structure includes a first liquid 1, a second liquid 2, and a third liquid 3 sequentially disposed along an axis 8. The second liquid 2 is immiscible with the first liquid 1 and the third liquid 3. The second liquid 2 is immiscible with the first liquid 1 and the second liquid 2 is immiscible with the third liquid 3. The first liquid 1 and the third liquid 3 are insulating liquids, and the second liquid 2 comprises an ionic liquid. The large viewing angle liquid lens structure further comprises at least two first electrodes 4, at least one second electrode 5 and at least two third electrodes 6. The first electrode 4 is located at the periphery of the first liquid 1 around the axis 8. The second electrode 5 is electrically connected to the ionic liquid, the second electrode 5 being configured to charge the ionic liquid. The second electrode 5 may apply a positive voltage so that the ionic liquid is positively charged, or the second electrode 5 may apply a negative voltage so that the ionic liquid is negatively charged. The third electrode 6 is located at the periphery of the third liquid 3 around the axis 8. The axis 8 is the center line of the cavity of the large-view-angle liquid lens structure.
By way of example, an insulating liquid is understood in particular a non-conductive liquid. Alternatively, the insulating liquid may be transformer oil, silicone oil, a fluoride liquid, mineral oil or a polymer insulating liquid. Ionic liquids are understood to mean in particular liquids composed of cations and anions which, under the action of an electric field, can produce a conductive effect. Alternatively, the ionic liquid may be a liquid containing an ammonium chloride or ammonium bromide plasma, as embodiments of the present invention are not limited in this respect.
Illustratively, referring to fig. 1, an embodiment of the present invention provides at least two first electrodes 4, the first electrodes 4 being located at the periphery of the first liquid 1 and distributed about the axis 8. At least one second electrode 5 is electrically connected to the ionic liquid, intended to apply an electric field to the ionic liquid, causing it to become charged. At least two third electrodes 6 are also arranged in the large viewing angle liquid lens structure, the third electrodes 6 being located at the periphery of the third liquid 3, distributed around the axis 8. The first electrode 4, the second electrode 5 and the third electrode 6 form a cavity in which the first liquid 1, the second liquid 2 and the third liquid 3 are arranged.
The large-viewing-angle liquid lens structure provided by the embodiment of the invention comprises a first liquid 1, a second liquid 2 and a third liquid 3, and at least two first electrodes 4, at least one second electrode 5 and at least two third electrodes 6 which are matched with the first liquid 1, the second liquid 2 and the third liquid 3. By adjusting the voltages applied to the first electrode 4, the second electrode 5 and the third electrode 6, an adjustment of the focal length and/or the optical axis of the large viewing angle liquid lens structure is achieved. Further, compared with a liquid lens provided with two liquids, the second liquid 2 in the embodiment of the invention can receive forces in the upper and lower directions simultaneously, so that the deformation degree of the second liquid 2 is increased, and the speed of the second liquid 2 reaching the preset deformation position is increased. The focal length and/or the optical axis of the large-viewing-angle liquid lens structure are adjusted, the deflection angle of the optical axis is increased, and the reaction speed of the large-viewing-angle liquid lens structure is increased.
Illustratively, the contact angle between the second liquid 2 and the wall surface is controlled by the combination of the working voltages applied to the first electrode 4, the second electrode 5 and the third electrode 6, respectively, so as to change the surface shape of the interface between the first liquid 1 and the second liquid 2 and/or change the surface shape of the interface between the second liquid 2 and the third liquid 3, thereby achieving the purpose of controlling the curvature of the interface. When a certain voltage is applied to the first electrode 4, the second electrode 5 and the third electrode 6, the interface between the first liquid 1 and the second liquid 2 and the interface between the second liquid 2 and the third liquid 3 still keep a spherical state, and the central symmetry axis (i.e. the optical axis) of the interface is coincident with the axis 8 of the cavity, so that the zooming function of the large-visual-angle liquid lens structure is realized. The wall surface may be an inner wall surface of the cavity formed around the first electrode 4 or the third electrode 6. A dielectric layer 7 may be further provided between the first electrode 4 and the first liquid 1, a dielectric layer 7 may be further provided between the third electrode 6 and the third liquid 3, and the wall surface may be a surface of the dielectric layer 7.
The dielectric layer 7 is illustratively provided with a dielectric layer opening through which the second electrode 5 is electrically connected to the second liquid 2.
Alternatively, referring to fig. 1, the second electrode 5 is located between the first electrode 4 and the third electrode 6 along the extension direction of the axis 8. Along the extension of the axis 8, the first electrode 4, the second electrode 5 and the third electrode 6 are arranged in sequence. The second electrode 5 is located at the periphery of the second liquid 2. Thereby, the second liquid 2 can be directly and electrically connected to the second electrode 5 on the periphery thereof, and the distance between the second liquid 2 and the second electrode 5 is short, facilitating wiring. On the other hand, light may be incident via the third liquid 3, pass through the second liquid 2, and finally exit via the first liquid 1. The arrangement of the second electrode 5 at the periphery of the second liquid 2 reduces or even avoids the propagation channel of light occupied by the second electrode 5. In other embodiments, at least part of the second electrode 5 may also be located in the first liquid 1 or the third liquid 3, i.e. the second electrode 5 is electrically connected to the second liquid 2 through the first liquid 1 or the third liquid 3, for example.
When the optical axis of the liquid lens rotates, the numerical aperture is reduced compared with the vertical state because of the fixed shell, the light quantity is reduced, the light rotation angle is about half of the vertical axis rotation angle of the surface of the liquid lens, the light rotation range determines the optical angle range of the liquid lens, and the application rotation range is limited.
Fig. 2 is a schematic view illustrating optical axis deflection of a large-viewing angle liquid lens structure according to an embodiment of the present invention. Referring to fig. 2, the contact angle between the second liquid 2 and the wall surface is controlled by the combination of the working voltages applied to the first electrode 4, the second electrode 5 and the third electrode 6, and the contact angle is reduced by increasing the voltage according to the electrowetting principle, so that the contact angle between the wall surface and the second liquid 2 is smaller on the side where the high voltage is applied, the contact angle between the wall surface and the second liquid 2 where the low voltage is applied is larger, and the central symmetry axis (namely the optical axis 10) of the interface deviates from the axis 8 of the cavity, thereby achieving the purpose of changing the optical axis of the liquid lens structure with a large viewing angle.
Referring to fig. 1 and 2, the end of the first electrode 4 remote from the second liquid 2 is surrounded by a first light-passing port. The caliber of the first light through hole is D1. The second electrode 5 surrounds the second liquid 2 to form a second light-through opening, and the aperture of the second light-through opening is D2. The end of the third electrode 6, which is far away from the second liquid 2, surrounds a third light through hole, and the caliber of the third light through hole is D3. D1 is greater than D2, and/or D3 is greater than D2. In the implementation of the invention, the size of the upper opening and the lower opening of the large-visual-angle liquid lens structure is larger than that of the middle part, the size of the upper opening and the lower opening is increased, and the upper opening and the lower opening form an opening angle with the middle part of the large-visual-angle liquid lens structure so as to increase the light emission angle of the optical axis 10 after deviating from the axis 8. The stability of the light passing area is improved. On the other hand, in the optical axis rotation process of the large-view-angle liquid lens structure, the first liquid 1, the second liquid 2 and/or the third liquid 3 are reduced, and the focal length inaccuracy or the pattern distortion caused by surface shape inaccuracy due to side wall extrusion is reduced.
Illustratively, referring to fig. 2, the inclination angle of the light ray L1 is large, and in the known conventional liquid lens, the light ray L1 is blocked by the side wall and cannot exit. In the large-viewing-angle liquid lens structure provided by the embodiment of the invention, the light L1 is not blocked by the side wall due to the increased size of the upper opening and the lower opening, and can normally pass through the large-viewing-angle liquid lens structure.
Illustratively, referring to fig. 1, the aperture of the first light port is equal to the aperture of the third light port. D1 is equal to D3. The first light through opening and the third light through opening have the same size and have the same limiting effect on the light rays (namely, the inclined angle).
Fig. 3 is a schematic view of another large-angle liquid lens structure according to an embodiment of the invention. Referring to fig. 3, the aperture of the first light-passing port is larger than that of the third light-passing port. D1 is greater than D2, D3 is greater than D2, and D1 is greater than D3. In this embodiment, the aperture of the exit opening (i.e., the first light-passing opening) for the light can be set large, the light can exit through the first light-passing opening even if the light is deviated from the center by too large an angle, and deformation of the lens surface due to side wall extrusion is reduced.
Alternatively, referring to fig. 1 or 3, the cross-sectional shape of the first electrode 4 along the plane of the axis 8 includes a first electrode first portion 401 and a first electrode second portion 402. The first electrode first portion 401 and the first electrode second portion 402 are both straight line segments. The first electrode first portion 401 is a portion of the first electrode 4 distant from the second liquid 2, and the first electrode second portion 402 is a portion of the first electrode 4 adjacent to the second liquid 2. The first electrode first portion 401 extends away from the axis 8 and the first electrode second portion 402. And/or, the section of the third electrode 6 along the plane of the axis 8 includes a first portion 601 and a second portion 602 of the third electrode, where the first portion 601 and the second portion 602 of the third electrode are both straight line segments. The third electrode first portion 601 is a portion of the third electrode 6 distant from the second liquid 2, and the third electrode second portion 602 is a portion of the third electrode 6 adjacent to the second liquid 2. The third electrode first portion 601 extends away from the axis 8 and the third electrode second portion 602.
Illustratively, referring to fig. 1 or 3, the first electrode first portion 401 and the first electrode second portion 402 are connected and form a fold line of obtuse angle. The third electrode first portion 601 and the third electrode second portion 602 are connected and form a fold line of obtuse angle. In other embodiments, the first electrode 4 and the third electrode 6 may have other shapes as well. Fig. 3 is a schematic view of another large-angle liquid lens structure according to an embodiment of the invention. Illustratively, as shown in FIG. 3, the first electrode 4 has an arc in its cross-sectional shape along the plane of the axis 8, and the third electrode 6 has an arc in its cross-sectional shape along the plane of the axis 8. The connection between the first electrode first portion 401 and the first electrode second portion 402, and between the third electrode first portion 601 and the third electrode second portion 602 may be a smooth transition.
Alternatively, referring to fig. 1 or 4, the first electrode 4 and the third electrode 6 are symmetrically arranged about a horizontal reference plane 9. The horizontal reference plane 9 is perpendicular to the axis 8. The first electrode 4 and the third electrode 6 are arranged opposite each other, symmetrically to each other in the direction of extension of the axis 8, to ensure a uniform distribution of the electric field, thereby improving the optical performance of the large viewing angle liquid lens structure. It will be appreciated that when the first electrode 4 and the third electrode 6 are symmetrically arranged about the horizontal reference plane 9, the aperture of the first light-transmitting aperture is equal to the aperture of the third light-transmitting aperture.
Further, when not energized, the first liquid 1 and the third liquid 3 are symmetrically arranged about the horizontal reference plane 9. The upper and lower parts of the second liquid 2 are symmetrically arranged about a horizontal reference plane 9.
Alternatively, referring to fig. 1, 3 or 4, the second electrode 5 includes a first sub-second electrode 51 and a second sub-second electrode 52 disposed opposite to each other. The first sub-second electrode 51 and the second sub-second electrode 52 apply a voltage to the second liquid 2, so that the time for the second liquid 2 to reach a preset charged state is shortened, and the performance and response speed of the large-viewing-angle liquid lens structure are optimized.
The first sub-second electrode 51 and the second sub-second electrode 52 are exemplarily arranged spatially symmetrically with respect to the axis 8. The first sub-second electrode 51 and the second sub-second electrode 52 may be on the same plane and perpendicular to the axis 8 of the large viewing angle liquid lens structure.
Illustratively, the first sub-second electrode 51 may be disposed on the left side of the large viewing angle liquid lens structure, while the second sub-second electrode 52 is disposed on the right side of the large viewing angle liquid lens structure, causing the second liquid 2 to be positively or negatively charged.
Fig. 5 is a schematic top view of a first electrode according to an embodiment of the present invention, fig. 6 is a schematic top view of a third electrode according to an embodiment of the present invention, and referring to fig. 1, fig. 5 and fig. 6, at least two first electrodes 4 include a first sub-first electrode 41 and a second sub-first electrode 42 that are disposed opposite to each other. The at least two third electrodes 6 comprise a first sub third electrode 61 and a second sub third electrode 62 arranged opposite each other.
For example, referring to fig. 2, 5 and 6, the first sub-first electrode 41 may be disposed at the left side of the large viewing angle liquid lens structure with an opposite charge to the second liquid 2, and the second sub-first electrode 42 may be disposed at the right side of the large viewing angle liquid lens structure with the same charge as the second liquid 2. The first sub-third electrode 61 may be arranged on the left side of the large viewing angle liquid lens structure with the same charge as the second liquid 2, while the second sub-third electrode 62 is arranged on the right side of the large viewing angle liquid lens structure with the opposite charge as the second liquid 2. According to the interaction mechanism that ions with the same charge repel each other and ions with different charges attract each other, the central symmetry axis of the interface of the second liquid 2 deviates from the central axis of the cavity, so as to achieve the purpose of changing the optical axis 10 of the mirror.
The following will describe, by way of example, a large-angle liquid lens structure in which voltages applied to the first electrode, the second electrode, and the third electrode of each large-angle liquid lens structure are adjusted in the direction of the optical axis by changing the inclination direction of the contact surface, in which the optical axis is a straight line passing through the center of the large-angle liquid lens structure and perpendicular to the mirror surface of the large-angle liquid lens structure, and when the large-angle liquid lens structure is in the state of the lens as in fig. 7, the optical axis of the large-angle liquid lens structure is the Z-axis, which is the axis in the horizontal direction in fig. 7. When the large viewing angle liquid lens structure is in the tilted state of the lens as shown in fig. 8, the optical axis of the large viewing angle liquid lens structure is changed, and an included angle exists between the optical axis and the Z axis. For example, as shown in fig. 8, the included angle between the optical axis and the Z-axis of the large viewing angle liquid lens structure is 45 degrees. The focal length of the large-visual-angle liquid Lens structure is 1.95, the diameter of an optical Lens (Lens) is 1.5mm, the curvature is 1.03, the distance between a pixel and the Lens is 1.7mm, and the distance between the Lens and a receiving surface is 7.9mm.
When the same voltage is applied to the first electrode, the second electrode, and the third electrode of the large-angle liquid lens structure, the voltages of the respective sub-electrodes in the first electrode, the second electrode, and the third electrode are the same. The optical axis of the liquid lens is the Z-axis of the lens in fig. 7. When different voltages are applied to the first electrode, the second electrode, and the third electrode of the large-angle liquid lens structure, the degree of inclination of the contact surface formed by the first liquid, the second liquid, and the third liquid may vary as shown in the lens of fig. 8 due to the difference in voltage between the electrodes, the degree of inclination of the contact surface corresponding to the degree of adjustment of the optical axis. The optical axis is adjusted by applying different voltages to each sub-electrode in the first, second and third electrodes of the large viewing angle liquid lens structure.
Fig. 9 is a schematic top view of another first electrode according to an embodiment of the present invention, and fig. 10 is a schematic top view of another third electrode according to an embodiment of the present invention, where, as shown in fig. 9 and 10, at least two first electrodes 4 further include a third sub-first electrode 43 and a fourth sub-first electrode 44 disposed opposite to each other. The third sub-first electrode 43 is located between the first sub-first electrode 41 and the second sub-first electrode 42 in the axial direction around the axis 8, the fourth sub-first electrode 44 is located between the first sub-first electrode 41 and the second sub-first electrode 42, the at least two third electrodes 6 further comprise oppositely arranged third sub-third electrodes 63 and fourth sub-third electrodes 64, the third sub-third electrodes 63 are located between the first sub-third electrode 61 and the second sub-third electrode 62 in the axial direction around the axis 8, and the fourth sub-third electrodes 64 are located between the first sub-third electrode 61 and the second sub-third electrode 62.
Specifically, the third sub-first electrode 43 and the fourth sub-first electrode 44 are circumferentially arranged in a circular ring shape in the axial direction around the axis 8, between the first sub-first electrode 41 and the second sub-first electrode 42. The third sub-third electrode 63 and the fourth sub-third electrode 64 are circumferentially arranged in a circular ring shape in the axial direction around the axis 8, between the first sub-third electrode 61 and the second sub-third electrode 62.
The third sub-first electrode 43 and the fourth sub-first electrode 44 may be configured to be equally spaced from the first sub-first electrode 41 and the second sub-first electrode 42 to form a complete circular ring structure, ensuring that a desired shape change of the liquid is generated when a voltage is applied.
The greater the number of sub-electrodes included in each of the first electrode 4 and the third electrode 6, the more accurate the curvature and the optical axis direction adjustment for the corresponding large-angle liquid lens structure. It should be noted that, the number of sub-electrodes included in the first electrode 4 and the third electrode 6 may be set by those skilled in the art according to actual needs, and the present invention is not limited by comparison.
Optionally, the first liquid 1 and the third liquid 3 each comprise an oily liquid. The first liquid 1 is of the same or different material as the third liquid 3.
In the present embodiment, an oily liquid is specifically understood to be a liquid having good optical transparency and proper viscosity. Alternatively, the oily liquid may be mineral oil, silicone oil or other synthetic oil, which not only can change shape rapidly under the action of an electric field, but also can maintain higher optical quality.
For example, the first liquid 1 and the third liquid 3 may be selected to use the same silicone oil (e.g., polydimethylsiloxane, PDMS), or different oily liquids, e.g., the first liquid 1 is a mineral oil, and the third liquid 3 is a specific synthetic oil. This choice can be tailored to the application requirements to optimize the performance and response speed of the large viewing angle liquid lens structure.
Optionally, the large viewing angle liquid lens structure further comprises a dielectric layer 7, the dielectric layer 7 surrounding the first liquid 1, the second liquid 2 and the third liquid 3, the dielectric layer 7 being located between the first electrode 4 and the first liquid 1 and between the third electrode 6 and the third liquid 3.
In this embodiment, the dielectric layer 7 is specifically understood as a material with good insulating properties for isolating the electrodes from the liquid, so as to avoid short-circuiting between the electrodes and ensure an efficient distribution of the electric field. Alternatively, the dielectric layer may be made of Polyimide (PI), polytetrafluoroethylene (PTFE), polyurethane, or the like.
Illustratively, the choice of different materials for the dielectric layer 7 may be optimized as desired to achieve optimal optical effects and electric field control, the present invention is not limited by comparison.
Similar to the above embodiments, the present invention also provides an optical system employing a large-angle-of-view liquid lens structure. So that the optical system has the beneficial effects of the large-viewing-angle liquid lens structure. The optical system may be, for example, an optical lens, or other structures applied to a liquid lens.
Note that the above is only a preferred embodiment of the present invention and the technical principle applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, and that various obvious changes, rearrangements, combinations, and substitutions can be made by those skilled in the art without departing from the scope of the invention. Therefore, while the invention has been described in connection with the above embodiments, the invention is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the invention, which is set forth in the following claims.
Claims (12)
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| CN202411188627.4A CN119165564A (en) | 2024-08-28 | 2024-08-28 | A liquid lens structure and optical system with a large viewing angle |
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| CN202411188627.4A CN119165564A (en) | 2024-08-28 | 2024-08-28 | A liquid lens structure and optical system with a large viewing angle |
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