Compact folded camera structure
Folded cameras and dual folded-upright cameras that reduce a mobile electronic device and specifically a smartphone bump footprint and height. In some examples, the bump footprint is reduced by reducing the height of a back focal plane section of the folded camera. In some examples, the bump footprint is reduced by reducing the height of a back focal plane section and a lens subsection of the folded camera.
1. A folded camera, comprising:
a) an optical path folding element (OPFE) section including an OPFE for folding an optical path from a first direction to a second direction, the OPFE section having an OPFE height H P in the first direction;
b) a lens section positioned between the OPFE and an image sensor, the lens section having at least one lens section height H L in the first direction; and
c) a back focal length (BFL) section extending between the lens section and the image sensor and having a BFL section height H BFL in the first direction, wherein H BFL <H P .
2. The folded camera of claim 1 , wherein H BFL <H L .
3. The folded camera of claim 1 , wherein H L <H P .
4. The folded camera of claim 1 , wherein the lens section includes two subsections, wherein a lens subsection closer to the BFL section has a height H L2 , wherein H L2 <H L .
5. The folded camera of claim 4 , wherein H BFL ≤H L2 and H BFL <H L .
6. The folded camera of claim 5 , wherein the BFL section has a top side and a bottom side, wherein the lens section, BFL section and the image sensor share an optical axis, and wherein the optical axis in the BFL section is closer to the top side than to the bottom side, positioning the image sensor asymmetrically relative to a board it is mounted on.
7. The folded camera of claim 6 , wherein the top side has an internal surface structured to prevent stray light from being directed toward the image sensor.
8. The folded camera of claim 4 , further comprising a flash element positioned on the lens subsection closer to the BFL section and having a height H FLASH ≤H P .
9. The folded camera of claim 4 , further comprising a flash element positioned partially on the BFL section and partially on the lens subsection closer to the BFL section and having a height H FLASH ≤H P .
10. The folded camera of claim 4 , wherein the BFL section has a top side and a bottom side, wherein the lens section, BFL section and the image sensor share an optical axis, and wherein the optical axis in the BFL section is closer to the top side than to the bottom side, positioning the image sensor asymmetrically relative to a board it is mounted on.
11. The folded camera of claim 10 , wherein the top side has an internal surface structured to prevent stray light from being directed toward the image sensor.
12. The folded camera of claim 1 , wherein the BFL section has a top side and a bottom side, wherein the lens section has an optical axis parallel to the second direction and wherein the optical axis in the BFL section is closer to the top side of the BFL section than to the bottom side of the BFL section.
13. The folded camera of claim 1 , wherein the BFL section has a top side and a bottom side, wherein the lens section, BFL section and the image sensor share an optical axis, and wherein the optical axis in the BFL section is closer to the top side than to the bottom side, positioning the image sensor asymmetrically relative to a board it is mounted on.
14. The folded camera of claim 13 , wherein the top side has an internal surface structured to prevent stray light from being directed toward the image sensor.
15. The folded camera of claim 1 , further comprising a flash element positioned on the BFL section and having a height H FLASH ≤H P .
16. The folded camera of claim 1 , wherein the lens section has a width W L and wherein W L >H L >H BFL .
17. A dual-aperture camera comprising a folded camera according to claim 1 together with an upright camera.
18. The dual-aperture camera of claim 17 , wherein the upright camera has an upright camera optical axis parallel to the first direction.
19. A mobile electronic device comprising a folded camera according to claim 1 .
20. The mobile electronic device of claim 19 , comprising a bump on a surface thereof, wherein the bump surrounds an area including the folded camera and wherein at least one bump dimension is defined by a folded camera dimension.
21. A mobile electronic device comprising a dual-aperture camera according to claim 17 .
22. The mobile electronic device of claim 21 , comprising a bump on a surface thereof, wherein the bump surrounds an area including the dual-aperture camera and wherein at least one bump dimension is defined by a folded camera dimension.
23. The mobile electronic device of claim 22 , wherein the bump has a length, L B , defined along the second direction, wherein the dual-aperture camera has a length, L DC , defined along the second direction, and wherein L B <L DC .
24. The mobile electronic device of claim 21 , comprising a bump on a surface thereof, wherein the bump surrounds an area including the folded camera and wherein at least one bump dimension is defined by a folded camera dimension.
25. A method for reducing a bump footprint of a smartphone, the method comprising:
a) providing a smartphone; and
b) attaching the folded camera of claim 1 to an exterior surface of the smartphone, wherein the folded camera reduces the bump footprint of the smartphone.
26. The method of claim 25 , wherein the bump footprint includes a length L B1 , a width W B1 , and a height H B1 , wherein L B1 has a range of 5-50 mm, W B1 has a range of 1-20 mm and H B1 has a range of 0.05-3 mm.
27. The method of claim 26 , wherein the height of the BFL section, H BFL , is lower than the height of the OPFE section, H P , such that a shorter bump length L B1 is enabled.
28. The method of claim 27 , further incorporating a flash element into the bump footprint.
29. A mobile electronic device, comprising:
a) a dual camera comprising a folded sub-camera and an upright sub-camera, the folded sub-camera having a first optical axis and the upright sub-camera has an upright camera optical axis, the dual camera having a baseline measured between the first optical axis and the upright camera optical axis and having a length L DC measured in a direction along the direction of the baseline; and
b) a bump having a length L B measured in the direction along the baseline, wherein L B <L DC .
30. A method of manufacturing a folded camera, comprising:
a) providing an optical path folding element (OPFE) section with an OPFE for folding an optical path from a first direction to a second direction, the OPFE section having an OPFE height H P in the first direction;
b) providing a back focal length (BFL) section having a BFL section height H BFL in the first direction; and
c) providing a lens section having a lens section height H L in the first direction, wherein H BFL <H L .
31. The method of claim 30 , wherein the OPFE section has an OPFE section height H P in the first direction, wherein H BFL <H P .
32. The method of claim 30 , wherein the lens section has at least two subsections and wherein a lens subsection closer to the BFL section has a height H L1 , wherein H L1 <H L .
33. The method of claim 32 , wherein H BFL ≤H L1 and H BFL <H L .
34. The method of claim 30 , wherein the BFL section has a top side and a bottom side, wherein the lens section has an optical axis parallel to the second direction and wherein the optical axis in the BFL section is closer to the top side of the BFL section than to the bottom side of the BFL section.
35. The method of claim 30 , wherein the BFL section has a top side and a bottom side, wherein the lens section, BFL section and an image sensor share an optical axis, and wherein the optical axis in the BFL section is closer to the top side than to the bottom side, positioning the image sensor asymmetrically relative to a board it is mounted on.
36. The method of claim 35 , further comprising asymmetrically placing an image sensor relative to the top side and bottom side of the BFL section.