Methods and apparatus relating to a thin camera device
Methods and apparatus for implementing a camera having a depth which is less than the maximum length of the outer lens of at least one optical chain of the camera are described. In some embodiments a light redirection device, e.g., a mirror, is used to allow a relatively long optical chain with a relatively large non-circular outer lens. In some embodiments the light redirection device has a depth, e.g., front of camera to back of camera dimension, which is less than the maximum length of the aperture of the outer lens in the aperture's direction of maximum extent. Multiple optical chains with non-circular outer lenses arranged in different directions may and in some embodiments are used to capture images with the captured images being combined to generate a composite image.
1. A camera device, the camera device comprising:
a camera housing including a front surface and a rear surface having a thickness D where D is a distance between said front surface and said rear surface;
a first optical chain, in said camera housing, including i) a first light redirection device, ii) a first lens having a non-circular aperture, and iii) a sensor, said first optical chain having an optical axis including a first optical axis portion in front of said light redirection device and a second optical axis portion extending from the light redirection device to the sensor, said first lens being on said second optical axis portion, said non-circular aperture having a length less than or equal to D in a first direction along the direction of the thickness of the camera and a length larger than D along a second direction perpendicular to the first direction; and
a second optical chain, in said camera housing, including i) a second light redirection device, ii) a second lens having a second non-circular aperture, and iii) a second sensor, said second optical chain having an optical axis including a third optical axis portion in front of said second light redirection device and a fourth optical axis portion extending from the second light redirection device to the second sensor, said second non-circular aperture having a length less than or equal to D in the first direction along the thickness of the camera and a length larger than D along a third direction perpendicular to the direction of the thickness of the camera, said second and third directions being different.
2. The camera device of claim 1 , wherein said second and third directions are at an angle of 90 degrees with respect to each other.
3. The camera device of claim 1 , further comprising:
a third optical chain including i) a third light redirection device, ii) a third lens having a third non-circular aperture, and iii) a third sensor, said third optical chain having an optical axis including a fifth optical axis portion in front of said third light redirection device and a sixth optical axis portion extending from the third light redirection device to the third sensor, said third non-circular aperture having a length less than or equal to D in the first direction along the thickness of the camera and a length larger than D along a fourth direction perpendicular to the direction of the thickness of the camera, said first, second and third directions being different.
4. The camera device of claim 3 , wherein said second and third directions are at an angle of 90 degrees with respect to each other and wherein the second and fourth direction are at an angle with respect to each other between 30 degrees and 60 degrees.
5. The camera device of claim 1 , wherein said first light redirection device is a mirror.
6. The camera device of claim 1 , wherein said light redirection device is a prism.
7. The camera device of claim 1 , wherein said first light redirection device is a 45 degree angled plane mirror which redirects light by 90 degrees.
8. A method of operating a camera device that includes a camera housing including a front surface and a rear surface having a thickness D, where D is a distance between said front surface and said rear surface, the method comprising:
capturing a first image, using a first optical chain in said camera housing, said first optical chain including i) a first light redirection device, ii) a first lens having a non-circular aperture, and iii) a sensor, said first optical chain having an optical axis including a first optical axis portion in front of said light redirection device and a second optical axis portion extending from the light redirection device to the sensor, said first lens being on said second optical axis portion, said non-circular aperture having a length less than or equal to D in a first direction along the direction of the thickness of the camera and a length larger than D along a second direction perpendicular to the first direction;
capturing a second image, using a second optical chain in said camera housing, said second optical chain including i) a second light redirection device, ii) a second lens having a second non-circular aperture, and iii) a second sensor, said second optical chain having an optical axis including a third optical axis portion in front of said second light redirection device and a fourth optical axis portion extending from the second light redirection device to the second sensor, said second non-circular aperture having a length less than or equal to D in the first direction along the thickness of the camera and a length larger than D along a third direction perpendicular to the direction of the thickness of the camera, said second and third directions being different; and
storing captured images in a memory.
9. The method of claim 8 , wherein said second and third directions are at an angle of 90 degrees with respect to each other.
10. The method of claim 8 , further comprising:
capturing a third image, using a third optical chain, said third optical chain including i) a third light redirection device, ii) a third lens having a third non-circular aperture, and iii) a third sensor, said third optical chain having an optical axis including a fifth optical axis portion in front of said third light redirection device and a sixth optical axis portion extending from the third light redirection device to the third sensor, said third non-circular aperture having a length less than or equal to D in the first direction along the thickness of the camera and a length larger than D along a fourth direction perpendicular to the direction of the thickness of the camera, said first, second and third directions being different.
11. The method of claim 10 , wherein said second and third directions are at an angle of 90 degrees with respect to each other and wherein the second and fourth direction area at an angle with respect to each other between 30 degrees and 60 degrees.
12. A non-transitory computer readable medium comprising computer executable instructions for controlling a camera device that includes a camera housing including a front surface and a rear surface having a thickness D, where D is a distance between said front surface and said rear surface, said non-transitory computer readable medium comprising:
instructions, which when executed by a processor, control a first optical chain in said camera housing to capture an image, said first optical chain including i) a first light redirection device, ii) a first lens having a non-circular aperture, and iii) a sensor, said first optical chain having an optical axis including a first optical axis portion in front of said light redirection device and a second optical axis portion extending from the light redirection device to the sensor, said first lens being on said second optical axis portion, said non-circular aperture having a length less than or equal to D in a first direction along the direction of the thickness of the camera and a length larger than D along a second direction perpendicular to the first direction;
instructions, which when executed by said processor, control a second optical chain in said camera housing to capture a second image, said second optical chain including i) a second light redirection device, ii) a second lens having a second non-circular aperture, and iii) a second sensor, said second optical chain having an optical axis including a third optical axis portion in front of said second light redirection device and a fourth optical axis portion extending from the second light redirection device to the second sensor, said second non-circular aperture having a length less than or equal to D in the first direction along the thickness of the camera and a length larger than D along a third direction perpendicular to the direction of the thickness of the camera, said second and third directions being different; and
instructions, which when executed by said processor, control storage of captured images in a memory.