Auto focus and optical image stabilization with roll compensation in a compact folded camera

Patent metadata

Field	Value
Publication number	US-10070060-B2
Application number	US-201615505120-A
Country	US
Kind code	B2
Filing date	Sep 5, 2016
Priority date	Sep 6, 2015
Publication date	Sep 4, 2018
Grant date	Sep 4, 2018

Abstract

Folded digital camera module comprising an optical path folding element (OPFE) for folding light from a first optical path with a first optical axis to a second optical path with a second optical axis perpendicular to the first optical axis, an image sensor, and a lens module carrying a lens with a symmetry axis parallel to the second optical axis. The camera module is adapted to perform optical image stabilization (OIS) involving at least one tilt motion of the OPFE tilt around an axis such that the OPFE tilt creates an image Roll movement and a shift movement, the OPFE tilt-created image Roll movement compensating for a folded camera module-induced Roll movement and the shift movement cancellable by a movement of the lens module.

First claim

What is claimed is:

1. A folded camera module comprising:
a) an optical path folding element (OPFE) for folding light from a first optical path with a first optical axis to a second optical path with a second optical axis perpendicular to the first optical axis, the OPFE designed to tilt around an axis such that the OPFE tilt creates a Roll movement and a shift movement, the OPFE tilt-created Roll movement compensating for a folded camera module-induced Roll movement; and
b) a lens module carrying a lens with a symmetry axis parallel to the second optical axis, the lens module designed to move such as to compensate for the OPFE tilt-created shift movement, whereby the tilt of the OPFE and the movement of the lens module provide optical image stabilization (OIS) that includes image Roll compensation.

2. The folded camera module of claim 1 , wherein the OPFE design to tilt around an axis includes a design to tilt around a first axis included in a plane formed by the first and second optical axes.

3. The folded camera module of claim 2 , wherein the lens module design to move includes a design to move in a first direction orthogonal to both the first and second optical axes.

4. The folded camera module of claim 3 , wherein the lens module design to move further includes a design to move in a second direction parallel to the first optical axis.

5. The folded camera module of claim 3 , wherein the lens module is further designed to move for auto-focus in a direction parallel to the second optical axis.

6. The folded camera module of claim 2 , wherein the OPFE is further designed to tilt around a second tilt axis orthogonal to both the first and second optical axes.

7. The folded camera module of claim 2 , wherein the lens module is further designed to move for auto-focus in a direction parallel to the second optical axis.

8. The folded camera module of claim 1 , wherein the lens module is further designed to move for auto-focus in a direction parallel to the second optical axis.

9. The folded camera module of claim 1 , wherein the OPFE is selected from the group consisting of a prism, a mirror and a prism covered with a metallic reflecting surface.

10. A digital camera comprising a folded camera module according to claim 1 .

11. A method comprising:
a) providing a folded camera module that includes an optical path folding element (OPFE) for folding light from a first optical path with a first optical axis to a second optical path with a second optical axis perpendicular to the first optical axis and a lens module carrying a lens with a symmetry axis parallel to the second optical axis;
b) tilting the OPFE around an axis such that the OPFE tilt creates a Roll movement and a shift movement, the OPFE tilt-created Roll movement compensating for a folded camera module-induced Roll movement; and
c) moving the lens module such as to compensate for the OPFE tilt-created shift movement, whereby the tilt of the OPFE and the movement of the lens module provide optical image stabilization (OIS) that includes image Roll compensation.

12. The method of claim 11 , wherein the tilting the OPFE around an axis includes tilting the OPFE around a first axis included in a plane formed by the first and second optical axes.

13. The method of claim 12 , wherein the moving the lens module includes moving the lens module in a first direction orthogonal to both the first and second optical axes.

14. The method of claim 13 , wherein the moving the lens module includes moving the lens module in in a second direction parallel to the first optical axis.

15. The method of claim 14 , wherein the lens module is further designed to move for auto-focus in a direction parallel to the second optical axis.

16. The method of claim 13 , wherein the lens module is further designed to move for auto-focus in a direction parallel to the second optical axis.

17. The method of claim 12 , further comprising tilting the OPFE around a second tilt axis orthogonal to both the first and second optical axes.

18. The method of claim 12 , further comprising moving the lens module for auto-focus in a direction parallel to the second optical axis.

19. The method of claim 12 , wherein the OPFE is selected from the group consisting of a prism, a mirror and a prism covered with a metallic reflecting surface.

20. The method of claim 11 , further comprising moving the lens module for auto-focus in a direction parallel to the second optical axis.

Assignees

• Corephotonics Ltd
• Corephotonics Ltd

Inventors

• Goldenberg Ephraim
• Bachar Gil
• Jerby Itay
• Shabtay Gal

Classifications

• G02B27/646 Primary

  compensating for small deviations, e.g. due to vibration or shake (movement of one or more optical elements for control of motion blur in cameras, projectors or printers G03B2205/0007; image stabilisation in cameras peculiar to the presence or use of an electronic image sensor H04N23/68) · CPC title

• H04N23/68 Primary

  for stable pick-up of the scene, e.g. compensating for camera body vibrations · CPC title

• G03B2205/0007

  Movement of one or more optical elements for control of motion blur · CPC title

• G02B27/64

  Imaging systems using optical elements for stabilisation of the lateral and angular position of the image · CPC title

• G03B17/17

  with reflectors arranged in beam forming the photographic image, e.g. for reducing dimensions of camera · CPC title