Optical imaging system, method for performing optical image stabilization
An optical imaging system includes a sensor configured to obtain position and attitude information of the optical imaging system; an optical lens component; an image stabilizing mechanism, configured to change a path of the light based on the position and attitude information. The image stabilizing mechanism includes a first optical element; a support frame supporting the first optical element; at least two magnets, disposed on two sides of the first optical element, respectively; at least two coils, facing to the at least two magnets, respectively. When a current flows through the coil, the respective magnet is driven to move according to a direction of the current, to cause the movable support frame carrying the first optical element to move with respect to one or more axes to change the path of the light.
1. An optical imaging system, comprising:
a sensor, configured to obtain position and attitude information of the optical imaging system;
an optical lens component, configured to receive light for imaging;
an image stabilizing mechanism, configured to compensate for a movement of the optical imaging system based on the position and attitude information;
wherein the image stabilizing mechanism comprises:
a first optical element, configured to change a path of the light to be directed into the optical lens component;
a support frame, configured to support the first optical element;
at least two magnets, disposed on two sides of the first optical element, respectively; and
at least two coils, facing to the at least two magnets, respectively, wherein when a current is introduced into a coil based on the position and attitude information, a respective magnet is driven to move according to a direction of the current, to cause the support frame carrying the first optical element to move with respect to a plurality of axes to change the path of the light, wherein in response to different currents flowing through the at least two coils, the at least two magnets are driven to move, to cause the first optical element to rotate around an axis perpendicular to an imaging surface, wherein the imaging surface is a surface on which an image is formed.
2. The system of claim 1 , wherein when the same current flows through the at least two coils, the at least two magnets are driven to move, to cause the first optical element to rotate around a first axis parallel to the imaging surface and perpendicular to the at least two magnets.
3. The system of claim 1 , further comprising:
a bearing component, comprising at least two ball bearings and configured to hold the support frame.
4. The system of claim 3 , wherein the image stabilizing mechanism further comprises:
at least two yokes, facing to the at least two coils, respectively, and configured to generate magnetic force with the at least two magnets to hold the support frame.
5. The system of claim 1 ,
wherein the optical lens component comprises a fixed first lens component, a movable second lens component and a movable third lens component;
wherein the optical imaging system further comprises a piezoelectric driving mechanism configured to drive the movable second lens component and the movable third lens component to move together along an axis perpendicular to the imaging surface based on a mode switching instruction, wherein the imaging surface is a surface on which an image is formed.
6. The system of claim 5 , wherein the piezoelectric driving mechanism is configured to drive the movable second lens component to move between a first position and a second position based on the mode switching instruction to switch the optical imaging system between a telephoto mode and a wide-angle mode.
7. The system of claim 5 , wherein the piezoelectric driving mechanism is configured to drive the movable third lens component to move to a focusing position with movement of the movable second lens component, wherein the focusing position indicates a position at which the optical imaging system realizes focusing.
8. The system of claim 5 , wherein the piezoelectric driving mechanism comprises two drive mechanisms, one drive mechanism is configured to drive the movable second lens component to move and the other drive mechanism is configured to drive the movable third lens component to move with movement of the movable second lens component.
9. The system of claim 5 , wherein the piezoelectric driving mechanism comprises:
a position detection sensor, configured to detect positions of the movable second lens component and the movable third lens component.
10. The system of claim 5 , wherein each of the movable second lens component and the movable third lens component is moved within a range of 0-5 cm.
11. A method for performing optical image stabilization, comprising:
obtaining position and attitude information of an optical imaging system, wherein the optical imaging system comprises: a sensor; an optical lens component, configured to receive light for imaging; an image stabilizing mechanism comprising a first optical element, configured to change a path of the light; a support frame, configured to support the first optical element; at least two magnets, disposed on two sides of the first optical element, respectively, and at least two coils, facing to the at least two magnets, respectively;
introducing currents into the at least two coils based on the position and attitude information to drive the at least two magnets to move according to a direction of the current, to cause the support frame carrying the first optical element to move with respect to a plurality of axes to change the path of the light, wherein in response to different currents flowing through the at least two coils, the at least two magnets are driven to move, to cause the first optical element to rotate around an axis perpendicular to an imaging surface, wherein the imaging surface is a surface on which an image is formed.
12. The method of claim 11 , wherein when the same current flows through the at least two coils, the at least two magnets are driven to move, to cause the first optical element to rotate around a first axis parallel to the imaging surface and perpendicular to the at least two magnets.
13. The method of claim 11 , wherein the optical imaging system comprises a fixed first lens component, a movable second lens component and a movable third lens component;
wherein the method further comprises:
driving the movable second lens component and the movable third lens component to move together along an axis perpendicular to the imaging surface based on a mode switching instruction, wherein the imaging surface is a surface on which an image is formed.
14. The method of claim 13 , wherein driving the movable second lens component and the movable third lens component to move together along the axis perpendicular to the imaging surface based on the mode switching instruction comprises:
driving the movable second lens component to move between a first position and a second position based on the mode switching instruction to switch the optical imaging system between a telephoto mode and a wide-angle mode.
15. The method of claim 13 , wherein driving the movable second lens component and the movable third lens component to move together along the axis perpendicular to the imaging surface based on the mode switching instruction further comprises:
driving the movable third lens component to move to a focusing position with movement of the movable second lens component, wherein the focusing position indicates a position at which the optical imaging system realizes focusing.
16. The method of claim 13 , wherein each of the movable second lens component and the movable third lens component is moved within a range of 0-5 cm.
17. The method of claim 13 , wherein the movable second lens component is driven by a drive mechanism to move and the movable third lens component is driven by a further drive mechanism to move with movement of the movable second lens component.
18. A non-transitory computer-readable medium having instructions stored thereon for execution by a processor to implement operations of a method for performing optical image stabilization, comprising:
obtaining position and attitude information of an optical imaging system, wherein the optical imaging system comprises: a sensor; an optical lens component, configured to receive light for imaging; an image stabilizing mechanism comprising a first optical element, configured to change a path of the light; a support frame, configured to support the first optical element; at least two magnets, disposed on two sides of the first optical element, respectively, and at least two coils, facing to the at least two magnets, respectively; and
introducing currents into the at least two coils based on the position and attitude information to drive the at least two magnets to move according to a direction of the current, to cause the support frame carrying the first optical element to move with respect to a plurality of axes to change the path of the light, wherein in response to different currents flowing through the at least two coils, the at least two magnets are driven to move, to cause the first optical element to rotate around an axis perpendicular to an imaging surface, wherein the imaging surface is a surface on which an image is formed.