Folded camera with actuator for moving optics
Various embodiments include a camera with folded optics and lens shifting capabilities. In some examples, a folded optics arrangement of the camera may include one or more lens elements and light path folding elements (e.g., prisms). Some embodiments include voice coil motor (VCM) actuator arrangements, carrier arrangements, and/or suspension arrangements to provide autofocus (AF) and/or optical image stabilization (OIS) movement. Furthermore, some embodiments include position sensor arrangements for position sensing with respect to AF and/or OIS movement.
1. A camera, comprising:
a folded optics arrangement to fold a path of light, the folded optics arrangement comprising:
a first light folding element; and
a lens group comprising one or more lens elements;
an image sensor;
a lens carrier coupled to the lens group;
a voice coil motor (VCM) actuator configured to move the lens group relative to the image sensor, wherein the VCM actuator comprises:
a first optical image stabilization (OIS) VCM actuator configured to move the lens group in at least a first direction, the first OIS VCM actuator comprising:
a first coil attached to the lens carrier; and
a magnet;
a second OIS VCM actuator configured to move the lens group in at least a second direction that is orthogonal to the first direction, the second OIS VCM actuator comprising:
a second coil attached to a fixed structure that is stationary relative to movement of the lens group; and
the magnet.
2. The camera of claim 1 , wherein the magnet is attached to a magnet holder, wherein the VCM actuator further comprises:
an autofocus (AF) VCM actuator configured to move the lens carrier and the magnet holder together, relative to the image sensor, in a third direction orthogonal to the first direction and orthogonal to the second direction;
wherein the first OIS VCM actuator is configured to move the lens carrier relative to the magnet holder in the first direction; and
wherein the second OIS VCM actuator is configured to move the lens carrier and the magnet holder together, relative to the image sensor, in the second direction.
3. The camera of claim 2 , wherein the folded optics arrangement further comprises:
a second light folding element, wherein the lens group is disposed between the first light folding element and the second light folding element;
wherein the image sensor is configured to capture light that has passed through the first light folding element, the lens group, and the second light folding element.
4. The camera of claim 3 , wherein the magnet holder at least partially encircles the folded optics arrangement.
5. The camera of claim 2 , further comprising:
a suspension arrangement to suspend the lens group and allow movement of the lens group along multiple axes, the suspension arrangement comprising:
a leaf spring attached to the lens carrier structure and the magnet holder, so as to allow movement of the lens group and the lens carrier together, relative to the magnet holder, in at least the first direction; and
suspension wires to allow movement of the lens group, the lens carrier, and the magnet holder together, relative to the image sensor, in the second and third directions, wherein a suspension wire of the suspension wires comprises:
a first end portion attached to the leaf spring; and
a second end portion attached to the fixed structure that is stationary relative to movement of the lens group.
6. A device, comprising:
one or more processors;
memory storing program instructions executable by the one or more processors to control operation of a camera; and
the camera, comprising:
a folded optics arrangement to fold a path of light, the folded optics arrangement comprising:
a first light folding element; and
a lens group comprising one or more lens elements;
an image sensor;
a lens carrier coupled to the lens group;
a voice coil motor (VCM) actuator configured to move the lens group relative to the image sensor, wherein the VCM actuator comprises:
a first optical image stabilization (OIS) VCM actuator configured to move the lens group in at least a first direction, the first OIS VCM actuator comprising:
a first coil attached to the lens carrier; and
a magnet;
a second OIS VCM actuator configured to move the lens group in at least a second direction that is orthogonal to the first direction, the second OIS VCM actuator comprising:
a second coil attached to a fixed structure that is stationary relative to movement of the lens group; and
the magnet.
7. The device of claim 6 , wherein the magnet is attached to a magnet holder, wherein the VCM actuator further comprises:
an autofocus (AF) VCM actuator configured to move the lens carrier and the magnet holder together, relative to the image sensor, in a third direction orthogonal to the first direction and orthogonal to the second direction;
wherein the first OIS VCM actuator is configured to move the lens carrier relative to the magnet holder in the first direction; and
wherein the second OIS VCM actuator is configured to move the lens carrier and the magnet holder together, relative to the image sensor, in the second direction.
8. The device of claim 7 , wherein the folded optics arrangement further comprises:
a second light folding element, wherein the lens group is disposed between the first light folding element and the second light folding element;
wherein the image sensor is configured to capture light that has passed through the first light folding element, the lens group, and the second light folding element.
9. The device of claim 8 , wherein the magnet holder at least partially encircles the folded optics arrangement.
10. The device of claim 7 , wherein the AF VCM actuator comprises one or more coils attached to the magnet holder.
11. The device of claim 10 , wherein at least one other coil of the one or more coils is attached to the magnet holder.
12. The device of claim 7 , wherein:
the first light folding element is a first prism comprising:
an object side through which light enters the first prism; and
a first reflecting surface side comprising a first reflective surface to redirect the light towards the lens group; and
the folded optics arrangement further comprises a second prism comprising:
a second reflecting surface side comprising a second reflective surface to redirect the light towards the image sensor; and
an image side through which the light exits the first prism, the image side proximate the image sensor.
13. The device of claim 12 , wherein:
the first reflecting surface side is angled relative to the object side of the first prism; and
the AF VCM actuator comprises at least one magnet and at least one coil disposed within a space under the first reflecting surface side.
14. The device of claim 7 , wherein the camera further comprises:
a suspension arrangement to suspend the lens group and allow movement of the lens group along multiple axes, the suspension arrangement comprising:
a leaf spring attached to the lens carrier structure and the magnet holder, so as to allow movement of the lens group and the lens carrier together, relative to the magnet holder, in at least the first direction; and
suspension wires to allow movement of the lens group, the lens carrier, and the magnet holder together, relative to the image sensor, in the second and third directions, wherein a suspension wire of the suspension wires comprises:
a first end portion attached to the leaf spring; and
a second end portion attached to the fixed structure that is stationary relative to movement of the lens group.
15. The device of claim 6 , wherein the camera further comprises:
one or more position sensors configured to sense movement of the lens group in the first and second directions.
16. A folded optics actuator system, comprising:
a lens carrier configured to hold a lens group;
a voice coil motor (VCM) actuator configured to move the lens carrier relative to an image sensor, wherein the VCM actuator comprises:
a first optical image stabilization (OIS) VCM actuator configured to move the lens carrier in at least a first direction, the first OIS VCM actuator comprising:
a first coil attached to the lens carrier; and
a magnet;
a second OIS VCM actuator configured to move the lens carrier in at least a second direction that is orthogonal to the first direction, the second OIS VCM actuator comprising:
a second coil attached to a fixed structure that is stationary relative to movement of the lens carrier; and
the magnet.
17. The folded optics actuator system of claim 16 , wherein the magnet is attached to a magnet holder, wherein the VCM actuator further comprises:
an autofocus (AF) voice coil motor (VCM) actuator configured to move the lens carrier and the magnet holder together, relative to the image sensor, in a third direction orthogonal to the first direction and orthogonal to the second direction;
wherein the first optical image stabilization (OIS) VCM actuator is configured to move the lens carrier relative to the magnet holder in the first direction; and
wherein the second OIS VCM actuator is configured to move the lens carrier and the magnet holder together, relative to the image sensor, in the second direction.
18. The folded optics system of claim 17 , further comprising:
a suspension arrangement to suspend the lens group and allow movement of the lens group along multiple axes, the suspension arrangement comprising:
a leaf spring attached to the lens carrier structure and the magnet holder, so as to allow movement of the lens group and the lens carrier together, relative to the magnet holder, in at least the first direction; and
suspension wires to allow movement of the lens group, the lens carrier, and the magnet holder together, relative to the image sensor, in the second and third directions, wherein a suspension wire of the suspension wires comprises:
a first end portion attached to the leaf spring; and
a second end portion attached to the fixed structure that is stationary relative to movement of the lens group.
19. The folded optics system of claim 16 , wherein the lens carrier is configured to hold the lens group between two light folding elements.
20. The folded optics system of claim 19 , wherein the magnet holder is configured to at least partially encircle the lens group and one or more of the two light folding elements.