CN112236692B - Lens device with deformable lens and optical system comprising same - Google Patents
Lens device with deformable lens and optical system comprising same Download PDFInfo
- Publication number
- CN112236692B CN112236692B CN201880094374.0A CN201880094374A CN112236692B CN 112236692 B CN112236692 B CN 112236692B CN 201880094374 A CN201880094374 A CN 201880094374A CN 112236692 B CN112236692 B CN 112236692B
- Authority
- CN
- China
- Prior art keywords
- lens arrangement
- memory alloy
- shape memory
- electrically conductive
- wall
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03G—SPRING, WEIGHT, INERTIA OR LIKE MOTORS; MECHANICAL-POWER PRODUCING DEVICES OR MECHANISMS, NOT OTHERWISE PROVIDED FOR OR USING ENERGY SOURCES NOT OTHERWISE PROVIDED FOR
- F03G7/00—Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for
- F03G7/06—Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for using expansion or contraction of bodies due to heating, cooling, moistening, drying or the like
- F03G7/065—Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for using expansion or contraction of bodies due to heating, cooling, moistening, drying or the like using a shape memory element
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
- G02B7/04—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification
- G02B7/08—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification adapted to co-operate with a remote control mechanism
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B15/00—Optical objectives with means for varying the magnification
Abstract
A lens arrangement comprising a chamber filled with a volume of transparent liquid, at least one of the walls of the chamber being transparent and resilient, the chamber being T-shaped or L-shaped and comprising a first wing and a second wing. The branched shape of the lens arrangement allows it to accommodate a larger volume of liquid relative to the outer dimensions of the lens arrangement.
Description
Technical Field
The present disclosure relates to a lens arrangement comprising a chamber with a volume of transparent liquid, a method of operating such a lens arrangement, and an optical system comprising two such lens arrangements.
Background
In an optical zoom camera, an actuation system based on piezoelectric SIDM (smooth impact drive) and VCM (voice coil motor, magnetic coil) is used to drive two or more lens groups, at least one for zooming and one for focusing. Such an arrangement typically requires a long travel distance (e.g. a few millimetres depending on the zoom factor) and typically requires two or more actuators to move the lens groups discretely for zooming and focusing respectively. Furthermore, these arrangements are space consuming and the adjustment of these arrangements is slow and noisy as they involve moving the actual lens.
On the other hand, the liquid lens works on the principle of deforming the lens rather than moving the lens. The prior art discloses such liquid lenses comprising a liquid chamber, which liquid lens is deformed by a change in the volume of liquid located within the liquid chamber. The liquid is conveyed into the liquid chamber via a tube connected to the other chamber or from the liquid chamber to the other chamber via the tube. A piston is arranged in the further chamber, the movement of the piston causing a movement of the liquid due to a volume change caused by the piston. The piston is operated by the VCM (magnetic coil) based actuation system described above. This arrangement is space consuming and the use of a VCM actuation system limits the forces that can be generated. Reducing the size of the VCM actuator system can lead to heat and force generation problems because the VCM actuator system requires a specific size in order to be able to generate sufficient force and allow dissipation of heat generated by the operating current. For these reasons, the VCM actuation system is typically arranged outside the optical system.
Disclosure of Invention
It is an object to provide an improved lens arrangement and an improved optical system comprising such a lens arrangement.
The foregoing and other objects are achieved by the features of the independent claims. Further implementations are apparent in the dependent claims, the detailed description and the drawings.
According to a first aspect, there is provided a lens arrangement comprising: a chamber filled with a transparent liquid, the chamber being defined by walls. At least one of the walls is resilient. At least another one of the walls is a first transparent wall, which is resilient. The second transparent wall is disposed opposite the first transparent wall. The chamber is T-shaped or L-shaped and includes a first wing defined by the first transparent wall and the second transparent wall and a second wing defined by the flexible wall.
This solution makes the lens arrangement as compact as possible while still including all necessary functions. The branched shape of the lens arrangement allows the lens arrangement to accommodate a relatively large volume of liquid relative to the outer dimensions of the lens arrangement, which in turn facilitates sufficient displacement of the first transparent wall for the lens arrangement to have suitable zoom and focus capabilities.
In a possible implementation of the first aspect, the first wing and the second wing are arranged at right angles to each other, facilitating the maximum possible displacement of the elastic wall.
In another implementation form of the first aspect,
the lens arrangement further comprises an actuator for deforming the resilient wall, thereby allowing the resilient wall and the first transparent wall to be moved in a simple and efficient manner.
In another possible implementation form of the first aspect, a rigid plate is associated with the at least one elastic wall for engaging with the actuator, reinforcing the elastic wall so that it is not damaged by contact with the actuator.
In another possible implementation of the first aspect, the actuator is configured to push at least one of the resilient walls into the chamber and/or pull the resilient wall away from the chamber to allow the actuator to travel as short a distance outside the chamber as possible.
In another possible implementation form of the first aspect, the actuator comprises at least one shape memory alloy member to facilitate an efficient yet structurally simple actuator.
In another possible implementation of the first aspect, the actuator includes at least one pair of shape memory alloy members arranged in parallel to allow bidirectional travel of the actuator.
In another possible implementation form of the first aspect, the lens device further comprises an electrically conductive bending arm connected to the at least one shape memory alloy member, a first end of the electrically conductive bending arm being fixed, a second end of the electrically conductive bending arm being arranged to move freely and to engage with the elastic wall or the rigid plate, thereby providing support for the shape memory alloy member.
In another possible implementation form of the first aspect, the electrically conductive curved arm is arranged between a pair of shape memory alloy members in the same plane, and one end of the electrically conductive curved arm is arranged to move freely in the plane when pulled by one of the shape memory alloy members, thereby providing a return force to the actuator such that the actuator is returned to a neutral position when the actuator is deactivated.
In another possible implementation of the first aspect, the lens apparatus further includes an electrical coupler connected to the one or more shape memory alloy member connections, the electrically conductive flexure arm for passing an amount of electrical current into one of the shape memory alloy members and the electrically conductive flexure arm such that the one shape memory alloy member contracts along its length, thereby activating the actuator and allowing it to travel a desired distance in response to the amount of electrical current delivered.
In another possible implementation form of the first aspect, the at least one shape memory alloy member is a wire, rod or strip having a circular, triangular, rectangular or polygonal cross-section, in order to facilitate the production of a space-efficient and shape-memory alloy member as much as possible.
According to a second aspect, there is provided an optical system comprising a first lens arrangement, a second lens arrangement, the first and second lens arrangements being arranged such that first and second transparent walls of the first and second lens arrangements are aligned along a common optical axis.
This solution makes the optical system as compact as possible while still including all necessary functions, including appropriate zoom and focus functions.
In one possible implementation of the second aspect, the first lens arrangement and the second lens arrangement are arranged between an image sensor and a prism, wherein the image sensor and the prism are aligned along the common optical axis, in order to facilitate a space efficient optical system as much as possible.
According to a third aspect, there is provided a method of operating a lens apparatus, the method comprising: providing a lens arrangement; providing an electrically conductive flexure arm connected to the one or more shape memory alloy members, a first end of the electrically conductive flexure arm being fixed and a second end of the electrically conductive flexure arm being arranged to move freely and engage the spring wall or the rigid plate; providing at least one electrical coupler connected to the one or more shape memory alloy members; selectively passing an electrical current through one of the at least one shape memory alloy members via the at least one electrical coupler, causing a temperature increase in the shape memory alloy member, resulting in a contraction along a length of the shape memory alloy member, thereby displacing the free moving end of the electrically conductive flexure arm, and deforming the resilient wall via the electrically conductive flexure arm, thereby changing the shape of the first transparent wall of the lens apparatus.
This approach is advantageous to make the lens arrangement as compact as possible while still including all necessary functions. The method provides a simple and effective way to displace the chamber walls sufficiently for the lens arrangement to have a suitable zoom and focus capability.
According to a fourth aspect, there is provided an actuator comprising: an electrically conductive curved arm, a first elongated SMA member and a second elongated SMA member each having a first end and a second end, the first and second elongated SMA members being spaced apart from the electrically conductive curved arm in parallel, the first and second elongated SMA members being on opposite sides of the electrically conductive curved arm, a first support being spaced apart longitudinally from a second support, the first support being fixed to the electrically conductive curved arm and to the first ends of both SMA members, the second support being fixed to the electrically conductive curved arm and to the second ends of both SMA members; a first electrical coupler connected to a first end of the first SMA member to pass an electrical current to the first SMA member; a second electrical coupler connected to a first end of the second SMA member to pass an electrical current to the second SMA member; a third electrical coupler between the electrically conductive curved arm and the two second ends of the elongated SMA member. Such an actuator has sufficient range of motion in both directions of travel while still being compact and comprising few components. Furthermore, the configuration of the actuator allows the actuator to be placed such that the actuator does not significantly increase the size of the optical system (in which the actuator is placed) or the like.
In one possible implementation of the fourth aspect, the conductive bending arm is flexible and is adapted to return to an original state after bending.
In another possible implementation of the fourth aspect, the first and second SMA members are configured to contract when heated by an electric current flowing through the SMA member of interest.
In another possible implementation of the fourth aspect, the first and second SMA members are configured to relax when cooling after heating is terminated by a current flowing through the SMA member of interest.
In another possible implementation of the fourth aspect, the first support is fixed to another entity.
In another possible implementation of the fourth aspect, at least one of the first electrical coupler, the second electrical coupler, and the third electrical coupler includes a crimp.
In another possible implementation manner of the fourth aspect, the first end of the conductive bent arm is fixed and the second end of the conductive bent arm is movable, or the first end of the conductive bent arm is movable and the second end of the conductive bent arm is fixed.
In another possible implementation of the fourth aspect, the free end of the electrically conductive curved arm is used to actuate another entity.
In another possible implementation of the fourth aspect, the actuator includes a controller for selectively passing an electrical current to the first SMA member or the second SMA member.
These and other aspects will be apparent from the embodiments described below.
Drawings
In the following detailed part of the present disclosure, aspects, embodiments, and implementations will be explained in more detail with reference to example embodiments shown in the drawings.
FIG. 1 is a cross-sectional view of a lens apparatus in a first state provided by one embodiment.
Fig. 2 is a cross-sectional view of the lens device of fig. 1 in a second state.
Fig. 3 is a cross-sectional view of the lens apparatus of fig. 1 in a third state.
FIG. 4 is a top view of an optical system having the lens apparatus of FIG. 1 provided in accordance with one embodiment.
Fig. 5 is a top view of the optical system of fig. 4.
Fig. 6 is a side view of the optical system of fig. 4.
Fig. 7 is a bottom view of the actuator and lens arrangement of the optical system of fig. 4.
FIG. 8 is a top view of an actuator according to one embodiment.
Fig. 9 is a side view of the actuator of fig. 8.
Fig. 10 is a top view of the actuator of fig. 8.
Fig. 11 is a bottom view of the actuator of fig. 8 without the base.
FIG. 12 is a side view of an actuator according to another embodiment.
Fig. 13 is a top view of the actuator of fig. 12.
FIG. 14 is a schematic side view of another embodiment providing an actuator in a first state.
Fig. 15 is a schematic side view of the actuator of fig. 14 in a second state.
Detailed Description
Fig. 1 to 3 show a lens arrangement 10, said lens arrangement 10 comprising a chamber 1 filled with a volume of transparent liquid. The chamber 1 is defined by a plurality of walls (3, 4, 5) forming a closed housing 2. At least one of the walls 3 is resilient. At least one other wall is a first transparent wall 4 which is also elastic. The second transparent wall 5 is placed opposite said first transparent wall 4. The housing 2 and the chamber 1 are preferably T-shaped or L-shaped and comprise a first wing 7 defined by the first transparent wall 4 and the second transparent wall 5 and a second wing 8 defined by the flexible wall 3. The first transparent wall 4 is arranged to extend in a direction perpendicular to the optical axis of the lens arrangement, and the elastic wall 3 is arranged to extend in a direction parallel to the optical axis of the lens arrangement and perpendicular to the first transparent wall 4. As shown in fig. 2, the first transparent wall 4 and the second transparent wall 5 extend in parallel.
Fig. 1 to 3 show a T-shaped chamber 1, wherein the horizontally extending leg of the T-shape corresponds to said second wing 8 and the vertically extending leg of the T-shape corresponds to said first wing 7. The two wings (7, 8) are interconnected such that liquid can move between the two wings without obstruction. Each wing (7, 8) comprises at least one elastic wall, enabling the internal volume of each wing to change in response to an external influence, as shown in figures 1 and 3. As will be discussed in more detail below. Said first wing 7 and said second wing 8 are preferably arranged at right angles to each other, but any other suitable angle is possible.
The elastic wall 3 may be provided with a rigid plate 9. The rigid plate 9 extends parallel to the elastic wall 3, preferably across a central portion of the elastic wall 3. Thus, the central portion of the elastic wall 3 is reinforced, while the lateral portions of the elastic wall 3 can expand and contract in response to the movement of the actuator 20, which actuator 20 is engaged with the elastic wall 3/the rigid plate 9 and serves to deform the elastic wall 3. The rigid plate 9 on the elastic wall provides rigid support for the actuator 20. In particular, the actuator is used to engage and move the rigid plate and thus move the flexible wall uniformly forward and backward. In this way, the area of the elastic wall corresponding to the area of the rigid plate can move back and forth in a direction perpendicular to the optical axis of the lens device, while the portion of the elastic wall surrounding the rigid plate 9 deforms to allow the movement. The rigid plate 9 can be fixed to the elastic wall so as to produce a corresponding deformation of the elastic wall when the actuator 20 is moved, thus producing a variation in the volume of the second wing 8.
The actuator 20 is bi-directional and is used to push the flexible wall 3 into the chamber 1 and to pull the flexible wall 3 away from the chamber 1. As shown in fig. 1, when the flexible wall 3 is pushed into the chamber 1, the internal volume of the second wing 8 decreases, pushing liquid from the second wing 8 into the first wing 7, thereby increasing the internal volume of the first wing 7. As shown in fig. 3, when the flexible wall 3 is pulled out of the chamber 1, the internal volume of the second wing 8 increases, pulling liquid from the first wing 7 into the second wing 8, thereby reducing the internal volume of the first wing 7.
As shown in fig. 7 to 15, the actuator 20 includes at least one shape memory alloy member (11, 12). The shape memory alloy member (11, 12) may be a wire, rod or bar having a circular, triangular, rectangular or polygonal cross-section. In a preferred embodiment, the actuator 20 comprises at least one pair of shape memory alloy members (11, 12) arranged in parallel.
The actuator 20 further comprises an electrically conductive flexure arm 13, the electrically conductive flexure arm 13 being connected to the shape memory alloy member (11, 12). For example, the first end 14 of the conductive bent arm 13 is fixed to the first support 24, and the opposite second end 15 of the conductive bent arm 13 is arranged to move freely and to engage with the elastic wall 3 or the rigid plate 9 (as also shown in fig. 7 and 8). Alternatively, the first end 14 of the conductive bent arm 13 may be movable and the second end 15 of the conductive bent arm 13 is fixed. In any case, the free end of said conductive bent arm 13 is used to actuate another entity, such as the above-mentioned elastic wall 3. The conductive bending arm 13 is flexible and is adapted to return to its original state (as shown in fig. 14) after bending (as shown in fig. 15).
In one embodiment, the conductive curved arm 13 is disposed between a pair of shape memory alloy members (11, 12) in the same plane, and one end of the conductive curved arm 13 is disposed to move freely in the plane when pulled by one of the shape memory alloy members (see fig. 7 to 11). In this embodiment, the second end 15 of the conductive curved arm 13 extends perpendicular to the first end of the conductive curved arm 13. In another embodiment, as shown in fig. 12 and 13, the second end 15 of the conductive flex arm 13 extends parallel to but opposite the first end of the conductive flex arm 13.
The electrical coupler (21, 22) connects an electrical power source to the shape memory alloy members (11, 12), and the electrically conductive flexure arm 13 is configured to pass an amount of electrical current through one of the shape memory alloy members (11, 12) and the electrically conductive flexure arm 13. When an electrical current is supplied to the shape memory alloy member (11, 12), the member contracts along its length and, as a result, the conductive bending arms 13 bend in a direction towards the electrically activated shape memory alloy member (11, 12).
When the shape memory alloy member 11 is activated, the conductive bending arm 13 bends in a direction away from the flexible wall 3, thereby pulling the flexible wall 3 out of the chamber 1. When the shape memory alloy member 12 is activated, the conductive bending arm 13 bends in a direction towards the flexible wall 3, thereby pushing the flexible wall 3 into the chamber 1. In other words, each of the shape memory alloy members (11, 12) is adapted to contract when heated by an electrical current flowing through the shape memory alloy member (11, 12) in question. Accordingly, each of the shape memory alloy members (11, 12) is adapted to relax when cooled after heating is terminated by a current flowing through the shape memory alloy member (11, 12) of interest (i.e. when no current is supplied to the shape memory alloy member (11, 12)).
The actuator 20 is described in detail below.
The actuator 20 comprises a first elongated shape memory alloy member 11 and a second elongated shape memory alloy member 12, both having a first end and a second end. The first and second elongated shape memory alloy members 11, 12 are spaced apart and extend parallel to the electrically conductive flexure arm 13 such that the first and second shape memory alloy members 11, 12 extend on opposite sides of the electrically conductive flexure arm 13. The first ends of the shape memory alloy members (11, 12) and the first ends 14 of the electrically conductive curved arms 13 may also be connected to an actuator housing 17.
The actuator 20 is further provided with a first support 24, which first support 24 is fixed to another entity, such as a housing of an electronic device or a printed circuit board. The actuator 20 is further provided with a second support 23, the second support 23 being longitudinally spaced from the first support in the direction of the electrically conductive curved arm 13.
The first support 24 is fixed to the conductive curved arm 13 and to first ends of the two shape memory alloy members (11, 12). The second support 23 is fixed to the second ends of the two shape memory alloy members (11, 12) and the electrically conductive curved arm 13.
A first electrical coupler 21 connects a power source to a first end of the first shape memory alloy member 11 to pass a current through the first shape memory alloy member 11. A second electrical coupler 22 connects a power source to a first end of the second shape memory alloy component 12 to pass an electrical current to the second shape memory alloy component 12. Furthermore, a third electrical coupler 23 is arranged between the electrically conductive curved arm 13 and the two second ends of the shape memory alloy members (11, 12). At least one of the first electrical coupler 21, the second electrical coupler 22 and the third electrical coupler 23 comprises a crimp.
The actuator 20 may also include a controller for selectively passing an electrical current to the first shape memory alloy component 11 or the second shape memory alloy component 12.
The present disclosure also relates to a method of operating a lens apparatus 10 such as described above. The method comprises providing a lens arrangement 10 and an actuator 20. The actuator 20 is realized by an electrically conductive flexure arm 13 connected to one or more shape memory alloy members (11, 12). The first end 14 of the electrically conductive curved arm 13 is fixed and the second end 15 of the electrically conductive curved arm 13 is arranged to move freely and to engage with the flexible wall 3 or the rigid plate 9 of the lens arrangement 10. Further, the method includes providing at least one electrical coupler (21, 22), the at least one electrical coupler (21, 22) being connected to the one or more shape memory alloy members (11, 12). Selectively passing an electrical current through one of the shape memory alloy members (11, 12) via the at least one electrical coupler (21, 22) to increase the temperature of the shape memory alloy member (11, 12) resulting in a contraction along the length of the shape alloy member (11, 12). Thus, the free moving end 14 of the conductive bent arm 13 is displaced and the elastic wall 3 is deformed by the free moving end 14, thereby changing the shape of the first transparent wall 4 of the lens device 10.
The present disclosure also relates to an optical system comprising two lens arrangements (10, 10'), see fig. 4 to 6. The optical system comprises a first lens arrangement 10 and a second lens arrangement 10'. Said first lens means 10 and said second lens means 10' are arranged such that the first transparent wall 4 and the second transparent wall 5 of both said first lens means 10 and said second lens means 20 are aligned along a common optical axis. The first lens arrangement 10 and the second lens arrangement 10' may be arranged between an image sensor 19 and a prism 18, wherein the image sensor 19 and the prism 18 are aligned along the common optical axis. Furthermore, the optical system may comprise a first lens group 6 and a second lens group 16 arranged between the image sensor 19 and the prism 18. Said first lens means 10 is arranged between said first lens group 6 and said second lens group 16, said second lens means 10' is arranged between said second lens group 16 and said prism 18.
Various aspects and implementations are described herein in connection with various embodiments. Other variations to the disclosed embodiments can be understood and effected by those skilled in the art in practicing the claimed subject matter, from a study of the drawings, the disclosure, and the appended claims. In the claims, the word "comprising" does not exclude other elements or steps, and the terms "a" or "an" do not exclude a plurality. A single processor or other unit may fulfill the functions of several items recited in the claims. The mere fact that certain measures are recited in mutually different dependent claims does not indicate that a combination of these measures cannot be used to advantage. A computer program may be stored/distributed on a suitable medium, such as an optical storage medium or a solid-state medium supplied together with or as part of other hardware, but may also be distributed in other forms, such as via the internet or other wired or wireless telecommunication systems.
Reference signs used in the claims shall not be construed as limiting the scope.
Claims (12)
1. A lens arrangement (10), characterized in that the lens arrangement (10) comprises:
a chamber (1), said chamber (1) being filled with a transparent liquid and being defined by walls,
at least one of said walls being a flexible wall (3),
at least another one of said walls being a first transparent wall (4), said first transparent wall (4) being elastic,
a second transparent wall (5) placed opposite to the first transparent wall (4),
the chamber (1) is T-shaped or L-shaped and comprises a first wing (7) defined by the first transparent wall (4) and the second transparent wall (5) and a second wing (8) defined by the flexible wall (3);
an actuator (20), said actuator (20) being for deforming said elastic wall (3), said actuator (20) comprising at least one shape memory alloy member (11, 12);
-an electrically conductive curved arm (13), said electrically conductive curved arm (13) being connected to said at least one shape memory alloy member (11, 12), a first end (14) of said electrically conductive curved arm (13) being fixed, a second end (15) of said electrically conductive curved arm (13) being arranged to move freely and to engage with said elastic wall (3).
2. Lens arrangement (10) according to claim 1, characterized in that the first wing (7) and the second wing (8) are arranged at right angles to each other.
3. Lens arrangement (10) according to claim 1, characterized in that a rigid plate (9) is associated with said at least one elastic wall (3) for engagement with said actuator (20).
4. Lens arrangement (10) according to claim 1, characterized in that the actuator (20) is adapted to push at least one of the elastic walls (3) into the chamber (1) and/or to pull the elastic wall (3) away from the chamber (1).
5. Lens arrangement (10) according to claim 1, characterized in that the actuator (20) comprises at least one pair of shape memory alloy members (11, 12) arranged in parallel.
6. Lens arrangement (10) according to claim 3, characterized in that the second end (15) of the electrically conductive curved arm (13) is arranged to move freely and to engage with the resilient wall (3) via the rigid plate (9).
7. Lens arrangement (10) according to claim 6, characterized in that the electrically conductive curved arm (13) is arranged between the shape memory alloy members (11, 12) in the same plane, one end of the electrically conductive curved arm (13) being arranged to move freely in the plane when pulled by one of the shape memory alloy members.
8. Lens arrangement (10) according to any of claims 1 to 7, characterized in that the lens arrangement (10) further comprises an electrical coupler (21, 22), the electrical coupler (21, 22) being connected to the one or more shape memory alloy members (11, 12), the electrically conductive bending arm (13) being adapted to pass an amount of electrical current into one of the shape memory alloy members (11, 12) and the electrically conductive bending arm (13) such that the one shape memory alloy member (11, 12) contracts along its length.
9. Lens arrangement (10) according to claim 1, characterized in that said at least one shape memory alloy member (11, 12) is a wire, rod or strip having a circular, triangular, rectangular or polygonal cross-section.
10. An optical system, comprising:
a first lens arrangement (10 ") as claimed in any one of claims 1 to 9,
a second lens arrangement (10 ') being the lens arrangement (10) of any one of claims 1 to 9, wherein the first lens arrangement (10 ") and the second lens arrangement (10 ') are arranged such that the first transparent wall (4) and the second transparent wall (5) of both the first lens arrangement (10") and the second lens arrangement (10 ') are aligned along a common optical axis.
11. The optical system according to claim 10, characterized in that the first lens arrangement (10 ") and the second lens arrangement (10') are arranged between an image sensor (19) and a prism (18), wherein the image sensor (19) and the prism (18) are aligned along the common optical axis.
12. A method of operating a lens apparatus (10), the method comprising:
providing a lens arrangement (10) according to any one of claims 1-9;
-providing an electrically conductive curved arm (13) connected to said one or more shape memory alloy members (11, 12), a first end (14) of said electrically conductive curved arm (13) being fixed, a second end (15) of said electrically conductive curved arm (13) being arranged to move freely and to engage with said elastic wall (3);
providing at least one electrical coupler (21, 22) connected to the one or more shape memory alloy members (11, 12);
-selectively passing an electrical current through one (11, 12) of said at least one shape memory alloy members (11, 12) by means of said at least one electrical coupler (21, 22), causing a temperature increase of said shape memory alloy member (11, 12) resulting in a contraction along the length of said shape memory alloy member (11, 12), thereby displacing the second end (15) of said electrically conductive bending arm (13) arranged to move freely, and deforming said resilient wall (3) by means of said electrically conductive bending arm (13), thereby changing the shape of the first transparent wall (4) of said lens arrangement (10).
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/EP2018/065360 WO2019238205A1 (en) | 2018-06-11 | 2018-06-11 | Lens arrangement with deformable lens and optical system comprising same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112236692A CN112236692A (en) | 2021-01-15 |
| CN112236692B true CN112236692B (en) | 2022-01-14 |
Family
ID=62716038
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201880094374.0A Active CN112236692B (en) | 2018-06-11 | 2018-06-11 | Lens device with deformable lens and optical system comprising same |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP3785053A1 (en) |
| CN (1) | CN112236692B (en) |
| WO (1) | WO2019238205A1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20210129639A (en) * | 2018-12-28 | 2021-10-28 | 옵토튠 컨슈머 아게 | An optical system comprising a lens having an adjustable focal length |
| CN116391152A (en) * | 2020-10-26 | 2023-07-04 | 华为技术有限公司 | Optical anti-shake device and apparatus comprising such a device |
| CN114442255B (en) * | 2022-02-21 | 2024-02-09 | 维沃移动通信有限公司 | Lens module and electronic equipment |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101796436A (en) * | 2007-08-11 | 2010-08-04 | 奥普托图尼股份公司 | Liquid lens system |
| CN101930120A (en) * | 2009-06-26 | 2010-12-29 | 索尼公司 | Lens of variable focal length, camera model and electronic equipment |
| CN102081212A (en) * | 2009-11-20 | 2011-06-01 | 三星电机株式会社 | Camera module and lens driving device |
| US7986465B1 (en) * | 2007-03-01 | 2011-07-26 | Rhevision Technology, Inc. | Systems and methods for effecting zoom and focus using fluidic adaptive lenses |
| WO2013046934A1 (en) * | 2011-09-30 | 2013-04-04 | 株式会社日立ハイテクノロジーズ | Optical element, method for manufacturing same, and shape inspecting apparatus |
| EP2869097A1 (en) * | 2013-11-01 | 2015-05-06 | Optotune AG | Tunable optical device |
| US9529337B2 (en) * | 2015-02-24 | 2016-12-27 | The Swatch Group Research And Development Ltd | Watch equipped with a magnifier |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7646544B2 (en) * | 2005-05-14 | 2010-01-12 | Batchko Robert G | Fluidic optical devices |
| WO2006088514A2 (en) * | 2004-11-05 | 2006-08-24 | The Regents Of The University Of California | Fluidic adaptive lens systems with pumping systems |
| US8087778B2 (en) * | 2009-02-13 | 2012-01-03 | Adlens Beacon, Inc. | Variable focus liquid filled lens mechanism |
| JP5430413B2 (en) * | 2010-01-07 | 2014-02-26 | 富士フイルム株式会社 | Variable focus lens and driving method thereof |
| KR20150058971A (en) * | 2013-11-21 | 2015-05-29 | 삼성전자주식회사 | Optical zoom probe |
-
2018
- 2018-06-11 CN CN201880094374.0A patent/CN112236692B/en active Active
- 2018-06-11 EP EP18733804.1A patent/EP3785053A1/en active Pending
- 2018-06-11 WO PCT/EP2018/065360 patent/WO2019238205A1/en unknown
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7986465B1 (en) * | 2007-03-01 | 2011-07-26 | Rhevision Technology, Inc. | Systems and methods for effecting zoom and focus using fluidic adaptive lenses |
| CN101796436A (en) * | 2007-08-11 | 2010-08-04 | 奥普托图尼股份公司 | Liquid lens system |
| CN101930120A (en) * | 2009-06-26 | 2010-12-29 | 索尼公司 | Lens of variable focal length, camera model and electronic equipment |
| CN102081212A (en) * | 2009-11-20 | 2011-06-01 | 三星电机株式会社 | Camera module and lens driving device |
| WO2013046934A1 (en) * | 2011-09-30 | 2013-04-04 | 株式会社日立ハイテクノロジーズ | Optical element, method for manufacturing same, and shape inspecting apparatus |
| EP2869097A1 (en) * | 2013-11-01 | 2015-05-06 | Optotune AG | Tunable optical device |
| US9529337B2 (en) * | 2015-02-24 | 2016-12-27 | The Swatch Group Research And Development Ltd | Watch equipped with a magnifier |
Also Published As
| Publication number | Publication date |
|---|---|
| EP3785053A1 (en) | 2021-03-03 |
| WO2019238205A1 (en) | 2019-12-19 |
| CN112236692A (en) | 2021-01-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112236692B (en) | Lens device with deformable lens and optical system comprising same | |
| JP2002130114A (en) | Actuator device | |
| CN107205617B (en) | Variable stiffness actuator | |
| KR20090081855A (en) | Lens displacement mechanism using shaped memory alloy | |
| WO2012060129A1 (en) | Sensor unit-actuating mechanism and liquid crystal display device provided with sensor unit-actuating mechanism | |
| CN110749971A (en) | SMA actuator, camera module, and electronic apparatus | |
| US11596294B2 (en) | Variable stiffness device and method of varying stiffness | |
| KR101624856B1 (en) | Piezo actuator for moving lens and camera module with the piezo actuator for portable device | |
| CN110955010A (en) | Liquid lens focusing and anti-shake mechanism, camera module and electronic equipment | |
| CN111736293A (en) | SMA actuating mechanism, anti-shake actuator and camera module | |
| CN111367038A (en) | SMA actuating device, camera module and electronic equipment | |
| WO2019062376A1 (en) | Camera module | |
| CN113348394B (en) | Shape memory driven linear actuator and optical system having the same | |
| CN212207804U (en) | SMA actuator, camera module, and electronic apparatus | |
| JP2009115982A (en) | Lens displacement mechanism applied to autofocus module | |
| CN212207817U (en) | SMA actuator and lens automatic focusing device | |
| JP2007279508A (en) | Lens driving mechanism | |
| CN212207805U (en) | SMA actuating device, camera module and electronic equipment | |
| CN111929799B (en) | Drive assembly, camera module and electronic device with shooting function | |
| EP4323647A1 (en) | Sma actuator assembly | |
| TWI514723B (en) | Actuator | |
| CN110764215A (en) | SMA actuation mechanism, camera module, and electronic apparatus | |
| WO2015104902A1 (en) | Drive unit and imaging device | |
| WO2015025734A1 (en) | Lens unit, imaging device and multi-lens array | |
| CN210982882U (en) | SMA actuator, camera module, and electronic apparatus |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |