Single camera device and method for 3D video imaging using a refracting lens

• US 8,723,922 B2
• Filed: 01/23/2009
• Issued: 05/13/2014
• Est. Priority Date: 09/25/2008
• Status: Expired due to Fees

• Current Assignee: Sony Corporation (Sony Group Corp.), Sony Electronics Inc. (Sony Group Corp.)
• Original Assignee: Sony Corporation (Sony Group Corp.), Sony Electronics Inc. (Sony Group Corp.)
• Inventors: Berger, Andrew M.
• Primary Examiner(s): BOUTAH, ALINA A
• Application Number:
  US12/320,310
• Publication Number:
  US 20100188483A1
• Time in Patent Office: 1,936 Days
• Field of Search: 348/46, 348/335, 348/E13.074
• US Class Current: 348/46
• CPC Class Codes: G02B 30/24 involving temporal multiplexing, e.g. using sequentially activated left and right shutters
• CPC Class Codes: H04N 13/211 using temporal multiplexing

Abstract

An example embodiment of the present invention may include an apparatus that captures 3D images having a lens barrel, including a lens disposed at a first end of the lens barrel, an image capture element at the second end of the lens barrel, and a refracting lens positioned along the optical axis of the lens barrel. The image capture device may have an adjustable active region, the adjustable active region being a region capable of capturing an image that is smaller than the total image capture area of the image capture element. The image capture element may capture images continuously at a predetermined frame rate. The image capture element may change the adjustable active region and the set of positioning elements may be adapted to continuous change the position of the refracting lens among a series of predetermined positions at a rate corresponding to the predetermined frame rate.

Claims

1. An apparatus for capturing 3D images including a lens barrel having a first end where light enters the lens barrel and a second end, comprising:

a lens disposed at a first end of the lens barrel;

an image capture element adapted to capture an image projected thereon at the second end of the lens barrel, having an adjustable active region, the adjustable active region being a region that captures an image that is smaller in area than the total image capture area of the image capture element;

a refracting lens positioned along the optical axis of the lens barrel and disposed between the lens and the image capture element, the refracting lens being mounted to a set of adjusting elements, the set of adjusting elements for adjusting the position of the edge of the refracting lens,

wherein, when the set of adjusting elements adjust the position of the edges of the refracting lens to a first position, a light beam from a target object, effectively parallel to the optical axis, is refracted by the refracting lens to the center of the active region so that the refracted light beam represents a first stereoscopic image captured by the image capture element and having a first point of view and a first field of view and, when the set of adjusting elements adjust the position of the edges of the refracting lens to a second position different from the first position, the light beam from the target object, effectively parallel to the optical axis, is refracted by the refracting lens to the center of the active region so that the refracted light beam represents a second stereoscopic image captured by the image capture element and having a second point of view different from the first point of view and a second field of view different from the first field of view with both the first and second points of view and the first and second fields of view being different from a non-refracted image.

2. The apparatus for capturing 3D images of claim 1, wherein the set of adjusting elements is configured to position the refracting lens such that light entering the lens barrel at a first angle, relative to the optical axis, is refracted by the refracting lens to the adjustable active region at a first location on the image capture element.

3. The apparatus for capturing 3D images of claim 2, wherein the set of adjusting elements is configured to position the refracting lens such that light entering the lens barrel at a second angle, relative to the optical axis, is refracted by the refracting lens to the adjustable active region at a second location on the image capture element.

4. The apparatus for capturing 3D images of claim 1, wherein the image capture element captures images continuously at a predetermined frame rate.

5. The apparatus for capturing 3D images of claim 4, wherein the set of adjusting elements are adapted to continuous change the position of the refracting lens to different positions from a series of predetermined positions in a predefined order;

and the image capture element is adapted to change the location of the adjustable active region to correlate with each of the series of predetermined positions in a predefined order.

6. The apparatus for capturing 3D images of claim 4, wherein the set of adjusting elements are adapted to change the positions of the refracting lens and the image capture element is adapted to change the location of the adjustable active region at a rate corresponding to the predetermined frame rate.

7. The apparatus for capturing 3D images of claim 4, wherein the set of adjusting elements are adapted to hold the first refracting lens at a first predetermined angle relative to the optical axis;

and

the first set of adjusting elements are mounted a rotating element that rotates the refracting lens about the optical axis.

8. The apparatus for capturing 3D images of claim 7, wherein the rotating element rotates the refracting lens at a rate of revolution corresponding to time period that is a multiple of the predetermined frame rate.

9. The apparatus for capturing 3D images of claim 1, wherein the set of adjusting elements adjust the position of the refracting lens receive a current or voltage at a rate corresponding to the predetermined frame rate.

10. The apparatus for capturing 3D images of claim 1, wherein the set of adjusting elements are piezoelectric elements.

11. The apparatus for capturing 3D images of claim 1, wherein the first stereoscopic image partially occupies the image capture element and is disposed thereon in a first corner portion thereof and the second stereoscopic image partially occupies the image capture element and is disposed thereon in a second corner portion thereof being diametrical to the first corner portion.

12. A method for capturing 3D images, comprising:

passing light through a lens at a first end of a lens barrel extending along and about an optical axis;

capturing the light at an adjustable active region of an image capture element at a second end of the lens barrel, the image capture element disposed on and extending perpendicularly relative to the optical axis, the adjustable active region being a region that captures an image that is smaller in area than the total image capture area of the image capture element;

positioning a refracting lens having a diametral centerline and positioned along an optical axis of the lens barrel between the lens and the image capture element, the refracting lens being mounted to a set of adjusting elements, the set of adjusting elements for adjusting the position of the edge of the refracting lens,

wherein, when the set of adjusting elements adjust the position of the edges of the refracting lens to a first position, a light beam from a target object, effectively parallel to the optical axis, is refracted by the refracting lens to the center of the active region so that the refracted light beam represents a first stereoscopic image captured by the image capture element and having a first point of view and a first field of view and, when the set of adjusting elements adjust the position of the edges of the refracting lens to a second position different from the first position, the light beam from the target object, effectively parallel to the optical axis, is refracted by the refracting lens to the center of the active region so that the refracted light beam represents a second stereoscopic image captured by the image capture element and having a second point of view different from the first point of view and a second field of view different from the first field of view with both the first and second points of view and the first and second fields of view being different from a non-refracted image.

13. The method for capturing 3D images of claim 12 wherein the step of positioning the refracting lens includes positioning the refracting lens such that light entering the lens barrel at a first angle, relative to the optical axis, is refracted by the refracting lens to the adjustable active region at a first location on the image capture element.

14. The method for capturing 3D images of claim 13 wherein the step of positioning the first refracting further includes positioning the refracting lens such that light entering the lens barrel at a second angle, relative to the optical axis, is refracted by the refracting lens to the adjustable active region at a second location on the image capture element.

15. The method for capturing 3D images of claim 14 wherein the first location partially occupies the image capture element in a first corner portion thereof.

16. The method for capturing 3D images of claim 15 wherein the second location partially occupies the image capture element in a second corner portion thereof being diametrical to the first corner portion.

17. The method for capturing 3D images of claim 12 wherein the capturing step includes capturing images continuously at a predefined frame rate.

18. The method for capturing 3D images of claim 17 wherein

the step of positioning the refracting lens includes continuously changing the position of the refracting lens to different positions from a series of predetermined positions in a predefined order;

and

the capturing step includes changing the location of the adjustable active region to a location to correlate with each of the series of predetermined positions in a predefined order.

19. The method for capturing 3D images of claim 18 wherein the set of adjusting elements and image capture element change the positions of the refracting lens and the image capture element changes the location of the adjustable active region at a rate corresponding to the predetermined frame rate.

20. The method for capturing 3D images of claim 17 wherein the set of adjusting elements hold the refracting lens at a predetermined angle relative to the optical axis;

and

further comprising pivoting the refracting lens about the optical axis.

21. The method for capturing 3D images of claim 20 wherein a rotating step includes pivoting the refracting lens at a rate of revolution corresponding to a multiple of the predetermined frame rate.

22. The method for capturing 3D images of claim 12 wherein the set of adjusting elements receive a current or voltage at a rate corresponding to the predetermined frame rate.

23. The method for capturing 3D images of claim 12 wherein the set of adjusting elements are piezoelectric elements.