Spin-out 360-degree camera for smartphone
Camera modules comprising two sub-cameras included in a camera housing and a spin-out actuator. The two sub-cameras are a first sub-camera with first field of view (FOV) FOV1≥180 deg oriented along a camera module optical axis and pointing in a first direction and a second sub-camera having a second FOV, FOV2≥180 deg, the second sub-camera being oriented along the camera module optical axis and pointing in a second direction which is opposite to the first direction. Such a camera module is operational to capture a 360 degree panoramic image or video stream by combining images obtained with the first sub-camera and the second sub-camera, where the spin-out actuator is operational to rotate the camera housing around an axis perpendicular to the camera module optical axis for switching the camera between a stowed position and a spun-out/operational position.
1. A camera module, comprising:
a first sub-camera comprising a first lens having a first effective focal length (EFL 1 ) and a first image sensor, the first sub-camera having a first field of view FOV1≥180 degrees and being oriented along a camera module optical axis and pointing in a first direction;
a second sub-camera comprising a second lens having a second effective focal length (EFL 2 )=EFL 1 and a second image sensor, the second sub-camera having a second field of view FOV2≥180 degrees and being oriented along the camera module optical axis and pointing in a second direction which is opposite to the first direction; and
a spin-out actuator,
wherein the first sub-camera and the second sub-camera are included in a camera housing,
wherein the camera is operational to capture a 360 degree panoramic image or video stream by combining images obtained with the first sub-camera and with the second sub-camera,
wherein the spin-out actuator is operational to rotate the camera housing around an axis perpendicular to the camera module optical axis for switching the camera between a stowed position and a spun-out position,
wherein the camera module is active in the spun-out position.
2. The camera module of claim 1 , wherein EFL 1 and EFL 2 are in the range of 0.75 mm-2.5 mm.
3. The camera module of claim 1 , included in a mobile device, wherein in the spun-out operational position the camera module optical axis is perpendicular to a front surface of the mobile device.
4. The camera module of claim 1 , included in a mobile device, wherein in the stowed position the camera module optical axis is parallel to a front surface of the mobile device.
5. The camera module of claim 1 , included in a mobile device, wherein in the stowed position the camera module housing is flush with both a front surface and a rear surface of the mobile device.
6. The camera module of claim 1 , wherein the camera housing is rotated by 90 degrees for switching between the stowed position and the spun-out position.
7. The camera module of claim 1 , wherein the first image sensor and the second image sensor are mounted on a single printed circuit board.
8. The camera module of claim 1 , wherein the camera module has a camera module height H M in the range of 5 mm-20 mm.
9. The camera module of claim 8 , wherein H M is in the range of 7 mm-11 mm.
10. The camera module of claim 1 , wherein the camera module has a camera module width W M in the range of 10 mm-30 mm.
11. The camera module of claim 10 , wherein W M is in the range of 15 mm-20 mm.
12. The camera module of claim 1 , wherein the spin-out actuator is an actuator selected from the group consisting of an electric stepper motor, a voice coil motor, and a shaped memory alloy actuator.
13. The camera module of claim 1 , wherein the camera module comprises a spin-out mechanism to rotate the camera housing, wherein the spin-out mechanism includes a worm-screw and a worm wheel, and wherein the worm-screw engages with the worm wheel.
14. The camera module of claim 1 , wherein EFL 1 and EFL 2 are in the range of 0.9 mm-1.5 mm.
15. The camera module of claim 1 , wherein EFL 1 and EFL 2 are in the range of 1 mm-1.2 mm.
16. The camera module of claim 1 , wherein the first lens and the second lens each include N=6 lens elements.
17. The camera module of claim 16 , wherein a power sequence of the N=6 lens elements is negative-negative-positive-positive-negative-positive.
18. The camera module of claim 1 , wherein a first lens element Li of both the first lens and the second lens is made of glass.
19. The camera module of claim 1 , wherein a last lens element Lo of both the first lens and the second lens is the strongest lens element in the lens.
20. The camera module of claim 1 , wherein a last lens element L 6 of both the first lens and the second lens is the strongest lens element in the lens.
21. The camera module of claim 1 , wherein an f number f 3 of a third lens element L 3 of both the first lens and the second lens fulfills f 3 <2×EFL.
22. The camera module of claim 1 , wherein both the first lens and the second lens have a f number lower than 3.
23. The camera module of claim 1 , wherein both FOV1 and FOV2 are smaller than 200 degrees.
24. The camera module of claim 1 , included in a multi-camera.
25. The camera module of claim 1 , included in a smartphone.