Camera using programmable aperture

• US 20080124070A1
• Filed: 03/22/2007
• Published: 05/29/2008
• Est. Priority Date: 11/28/2006
• Status: Abandoned Application

• Current Assignee: National Taiwan University (Government of The Republic of China)
• Original Assignee: National Taiwan University (Government of The Republic of China)
• Inventors: Wang, Hartmann, Chen, Homer H., Yeh, David, Liang, Chia-kai
• Application Number:
  US11/723,779
• Publication Number:
  US 20080124070A1
• Time in Patent Office: Days
• US Class Current: 396/435
• CPC Class Codes: G03B 15/00 Special procedures for taking photographs; Apparatus therefor
• CPC Class Codes: G03B 17/00 Details of cameras or camera bodies; Accessories therefor lens hoods or caps G03B11/04
• CPC Class Codes: G03B 41/00 Special techniques not covered by groups G03B31/00 - G03B39/00; Apparatus therefor
• CPC Class Codes: G03B 9/04 Single movable plate with two or more apertures of graded size, e.g. sliding plate or pivoting plate
• CPC Class Codes: G03B 9/10 Blade or disc rotating or pivoting about axis normal to its plane

Abstract

A camera using a programmable aperture is disclosed in which a programmable lens is disposed between a lens assembly and a sensor to properly transmit or block light rays reflected by a photographed object and incident to the lens assembly and then received by the sensor so as to obtain records of the incident light rays at different positions on the lens assembly. Moreover, complete light field data of the photographed object can be restored to facilitate subsequent image processing at any focal length.

Claims

1. A camera using a programmable aperture comprising:

a lens assembly;

at least one sensor located behind the lens assembly for capturing an image via the lens assembly; and

a programmable aperture located between the lens assembly and the sensor for dynamically adjusting aperture shape and light transmittance of the lens assembly when taking a picture, the programmable aperture comprising a plurality of regions, partial portions of the plurality of regions being opened or closed each time to allow the partial regions to selectively transmit or block light so as to obtain several different sets of images, the images being able to restore a complete light field.

2. The camera as claimed in claim 1, wherein the lens assembly is a lens.

3. The camera as claimed in claim 1, wherein the sensor is a sensor array.

4. The camera as claimed in claim 1, wherein the programmable aperture comprises an aperture and a light transmitting element, and the light transmitting element selectively allows partial regions to transmit light.

5. The camera as claimed in claim 4, wherein the light transmitting element transmits one region at a time.

6. The camera as claimed in claim 1, wherein the programmable aperture comprises an aperture and a light blocking element, and the light blocking element selectively blocks partial regions.

7. The camera as claimed in claim 6, wherein the light blocking element blocks one region at a time.

8. The camera as claimed in claim 1, wherein a superposition operation is performed to imaging signals received by sensor in order to acquire the complete light field.

9. The camera as claimed in claim 1, wherein the programmable aperture comprises a liquid crystal array, a patterned turntable, or a mechanical aperture.

10. The camera as claimed in claim 4, wherein the light transmitting element comprises a liquid crystal array, a patterned turntable, or a mechanical light transmitting plate.

11. The camera as claimed in claim 6, wherein the light transmitting element comprises a liquid crystal array, a patterned turntable, or a mechanical light blocking plate.

12. A camera with a programmable aperture comprising:

a lens assembly;

at least one sensor located behind the lens assembly for capturing an image via the lens assembly;

an aperture located between the lens assembly and the sensor for controlling light transmittance of the lens assembly; and

a programmable light transmitting or blocking element for dynamically adjusting aperture shape, the programmable light transmitting or blocking element comprising a plurality of regions, partial portions of the plurality of regions being opened or closed each time to let the partial regions selectively transmit or block light so as to obtain several different sets of images, the images being able to restore a complete light field.

13. The camera as claimed in claim 12, wherein the lens assembly is a lens.

14. The camera as claimed in claim 12, wherein the sensor is a sensor array.

15. The camera as claimed in claim 12, wherein the light transmitting or blocking element opens or closes one region each time.

16. The camera as claimed in claim 12, wherein a superposition operation is performed to imaging signals received by the sensor to acquire the complete light field.

17. The camera as claimed in claim 12, wherein the programmable light transmitting or blocking element comprises a liquid crystal array, a patterned turntable, or a mechanical light transmitting or blocking plate.