Optical-path folding-element with an extended two degree of freedom rotation range
Actuators for rotating an optical-path-folding-element with two, first and second, degrees of freedom in an extended rotation range around two respective rotation axes, folded cameras including such actuators and dual-cameras including a folded camera as above together with an upright camera.
1. An actuator, comprising:
a curved magnet;
a coil; and
a ball-guided mechanism operative to enable rotation of optical path folding element (OPFE) of a folded camera for yaw in an extended rotation range around a yaw rotation axis, the ball-guided mechanism comprising a first pair of curved grooves fixedly coupled to the magnet and a second pair of curved grooves fixedly coupled to the coil,
wherein the first and second pair of curved grooves share a center of curvature located on the yaw rotation axis,
wherein each groove of the first pair of grooves is coupled to a respective groove of the second pair of grooves through at least one ball, and
wherein the second pair of grooves is located on a side of the OPFE that is opposite to a side of the OPFE facing an image sensor.
2. The actuator of claim 1 , wherein the extended rotation range is equal to or greater than ±5 degrees.
3. The actuator of claim 1 , wherein the extended rotation range is equal to or greater than ±10 degrees.
4. The actuator of claim 1 , wherein the extended rotation range is between ±15-40 degrees.
5. The actuator of claim 1 , wherein the curved magnet is located on a side of the OPFE that is opposite to a side of the OPFE side facing a lens module in the folded camera.
6. The actuator of claim 1 , wherein the curved magnet is a single curved magnet used for creating an actuation force for rotation around the yaw rotation axis and for sensing the rotation around the yaw rotation axis.
7. The actuator of claim 1 , further comprising a magnetic flux sensor configured to sense rotation around the yaw rotation axis.
8. The actuator of claim 7 , wherein the magnetic flux sensor is a Hall sensor.
9. The actuator of claim 1 , wherein the first pair of curved grooves and the magnet move for the rotation and wherein the coil is stationary.
10. A smartphone comprising the actuator of claim 1 .
11. A smartphone comprising the actuator of claim 2 .