Folded camera with actuator for moving optics
Various embodiments include a camera with folded optics. Some embodiments include a voice coil motor (VCM) actuator module to provide autofocus (AF) and/or optical image stabilization (OIS) movement. Some embodiments include suspension arrangements. Some embodiments include flexure arrangements.
1. A camera, comprising:
a folded optics arrangement configured to fold a path of light, the folded optics arrangement comprising:
a first prism;
a second prism; and
a lens group disposed between the first prism and the second prism, wherein the lens group includes one or more lens elements;
an image sensor to capture light that has passed through the first prism, the lens group, and the second prism; and
an actuator module configured to tilt the first prism relative to the lens group and relative to the image sensor.
2. The camera of claim 1 , wherein the actuator module comprises one or more voice coil motor (VCM) actuators.
3. The camera of claim 1 , wherein the actuator module is further configured to move the lens group relative to the image sensor.
4. The camera of claim 3 , wherein the actuator module comprises:
a first optical image stabilization (OIS) VCM actuator to tilt the first prism relative to the image sensor to provide OIS movement of an image, captured via the image sensor, in a first direction;
a second OIS VCM actuator to translate the lens group relative to the image sensor to provide OIS movement of the image in a second direction that is orthogonal to the first direction; and
an autofocus (AF) VCM actuator to translate the lens group relative to the image sensor to provide AF movement of the lens group in a third direction that is orthogonal to the second direction.
5. The camera of claim 4 , wherein, to tilt the first prism relative to the image sensor, the first OIS VCM actuator is configured to rotate the first prism about an axis that is parallel to the second direction.
6. The camera of claim 4 , wherein:
the second OIS VCM actuator comprises:
OIS magnets, comprising:
a first OIS magnet; and
a second OIS magnet opposite the first magnet with respect to the lens group; and
OIS coils, comprising:
a first OIS coil proximate the first magnet; and
a second OIS coil proximate the second magnet and opposite the first OIS coil with respect to the lens group; and
the AF VCM actuator comprises:
an AF magnet; and
an AF coil;
wherein the AF magnet and the AF coil are located proximate one another and below the lens group.
7. A system, comprising:
a camera, comprising:
a folded optics arrangement configured to fold a path of light, the folded optics arrangement comprising:
a first prism;
a second prism; and
a lens group disposed between the first prism and the second prism, wherein the lens group includes one or more lens elements;
an image sensor to capture light that has passed through the first prism, the lens group, and the second prism;
an actuator module configured to translate the lens group, relative to the first prism and the second prism and relative to the image sensor, along two axes; and
a suspension arrangement to suspend the lens group and allow movement of the lens group along the two axes.
8. The system of claim 7 , wherein the suspension arrangement comprises:
a spring attached to at least one of a lens barrel that holds the lens group or a lens carrier that is coupled to the lens group;
one or more wires, wherein a wire of the one or more wires comprises:
a top end portion attached to the spring; and
a bottom end portion attached to a fixed structure of the camera.
9. The system of claim 8 , wherein the suspension arrangement further comprises a viscoelastic material that surrounds at least a portion of the wire to dampen movement of the wire.
10. The system of claim 8 , wherein the wire extends, from the top end portion to the bottom end portion, in a direction that is orthogonal to an optical axis defined by the lens group.
11. The system of claim 7 , wherein:
the suspension arrangement comprises a flexure formed from a sheet; and
the flexure comprises:
a top end portion attached to at least one of a lens barrel that holds the lens group or a lens carrier that is coupled to the lens group; and
a bottom end portion attached to a fixed structure of the camera.
12. The system of claim 11 , wherein the suspension arrangement further comprises a viscoelastic material that surrounds at least a portion of the flexure to dampen movement of the flexure.
13. The system of claim 12 , wherein the flexure extends, from the top end portion to the bottom end portion, in a direction that is orthogonal to an optical axis defined by the lens group.
14. A device, comprising:
a folded optics arrangement configured to fold a path of light, the folded optics arrangement comprising:
a prism module; and
a lens group comprising one or more lens elements; and
an image sensor to capture light that has passed through the prism module and the lens group;
wherein the prism module comprises:
a prism;
a prism carrier;
a base;
an actuator configured to tilt the prism relative to the lens group and relative to the image sensor; and
a flexure arrangement comprising one or more flexures that engage the prism carrier and the base.
15. The device of claim 14 , wherein:
the prism is a first prism of the folded optics arrangement;
the folded optics arrangement further comprises a second prism;
the lens group is located between the first prism and the second prism; and
the image sensor captures light that has passed through the first prism, the lens group, and the second prism.
16. The device of claim 14 , wherein:
the actuator is a voice coil motor (VCM) actuator; and
the VCM actuator tilts the prism relative to the image sensor to provide optical image stabilization (OIS) movement of an image, on the image sensor, in at least one direction.
17. The device of claim 16 , wherein:
the VCM actuator comprises:
a magnet attached to the prism carrier; and
a coil attached to the base; and
the VCM actuator tilts the prism, together with the prism carrier, relative to the base.
18. The device of claim 16 , wherein:
the VCM actuator comprises:
a coil attached to the prism carrier; and
a magnet attached to the base; and
the VCM actuator tilts the prism, together with the prism carrier, relative to the base.
19. The device of claim 14 , wherein the flexure arrangement comprises:
a first flexure that has a longest dimension in a first direction; and
a second flexure that has a longest dimension in a second direction that is orthogonal to the first direction.
20. The device of claim 19 , wherein:
the first flexure defines a vertically oriented plane;
the second flexure defines a horizontally oriented plane; and
an intersection between the vertically oriented plane and the horizontally oriented plane defines an axis about which the prism is tilted when actuated via the actuator.