Imaging system for producing an image having at least one distorted zone

• US 9,829,700 B2
• Filed: 06/05/2012
• Issued: 11/28/2017
• Est. Priority Date: 06/09/2011
• Status: Active Grant

• Current Assignee: Universite Laval
• Original Assignee: Universite Laval
• Inventors: Parent, Jocelyn, Thibault, Simon
• Primary Examiner(s): Rahaman, Mohammed
• Assistant Examiner(s): Lee, Jimmy S
• Application Number:
  US13/488,792
• Publication Number:
  US 20120314065A1
• Time in Patent Office: 2,002 Days
• Field of Search: 348148, 348147, 359291, 359666
• CPC Class Codes: G02B 27/0025 for optical correction, e.g. distorsion, aberration
• CPC Class Codes: G02B 27/0031 for scanning purposes
• CPC Class Codes: G02B 27/18 for optical projection, e.g. combination of mirror and condenser and objective photographic, cine and overhead projectors G03B21/00; photographic projection printing G03B27/32; photolithographic projectors G03F7/20; projection television H04N5/74; colour projection television H04N9/31

Abstract

There is provided an imaging system for producing an image of a scene, the image having at least one distorted zone, the imaging system comprising image producing means for producing an image of the scene; optical means for orienting light from the scene towards the image producing means, the optical means having a base optical power, the optical means being configurable to form at least one modified portion, each one of the at least one modified portion having a modified optical power different from the base optical power to thereby create at least one distorted zone on the image; and control means operatively connected to the optical means for changing the configuration of the optical means for forming the at least one modified portion. The imaging system may be reversible and provided instead as a scanning system.

Claims

1. An imaging system for producing an image of a scene, the image having at least one distorted zone, the imaging system comprising:

image producing means including a detector for producing the image of the scene within a field-of-view;

active optical means for orienting light from the scene towards the detector, a configuration of the active optical means being adapted to be changed between an inactivated configuration and an activated configuration, said active optical means having a base optical power in said inactivated configuration, said active optical means including at least one modified portion formed in said active optical means in said activated configuration, each one of the at least one modified portion in said active optical means having a higher and a lower modified optical power different from the base optical power of a rest of said active optical means in said activated configuration, said field-of-view of said detector being kept constant in said inactivated configuration and said activated configuration; and

control means operatively connected to the active optical means for changing the configuration of the active optical means for forming therein the at least one modified portion;

wherein said at least one distorted zone is created on the image produced by the detector, in use, upon change of the configuration of the active optical means in the activated configuration by the control means, each of said at least one distorted zone having a magnified zone and a reduced zone, said magnified zone having an increased magnification higher than an original magnification and said reduced zone having a decreased magnification lower than said original magnification and a rest of said image having said original magnification and in use, upon change of the configuration of the active optical means in the inactivated configuration by the control means, said image has said original magnification.

2. The imaging system of claim 1, wherein the active control means are further adapted for modifying the position of the at least one modified portion on the active optical means to thereby modify the position of the at least one distorted zone on the image.

3. The imaging system of claim 1, wherein the active optical means comprise a deformable mirror having a continuous membrane.

4. The imaging system of claim 1, wherein the active optical means comprise a segmented deformable mirror.

5. The imaging system of claim 1, wherein the active optical means comprise a liquid crystal spatial light modulator.

6. The imaging system of claim 1, wherein the active optical means is movable;

further wherein the imaging system comprises actuating means operatively coupled to the active optical means for moving the active optical means into a desired configuration.

7. The imaging system of claim 1, wherein the active optical means comprise:

a first optical member for creating the at least one distorted zone on the image; and

a second optical member operatively connected to the control means, the second optical member being configurable to modify the at least one distorted zone on the image.

8. The imaging system of claim 7, wherein the first optical member comprises a fixed form optical element.

9. The imaging system of claim 7, wherein the first optical member comprises an active optical element.

10. The imaging system of claim 7, wherein the second optical member comprises an active optical element.

11. The imaging system of claim 7, wherein the second optical member is movable;

and wherein the imaging system comprises actuating means operatively coupled to the second optical member for moving the second optical member into a desired configuration.

12. The imaging system of claim 1, further comprising image processing means operatively connected to the image producing means for converting the at least one distorted zone into at least one undistorted zone having a modified number of pixels.

13. The imaging system of claim 1 further comprising correcting means for correcting optical aberrations.

14. The imaging system of claim 13, wherein the correcting means comprise an active optical element.

15. The imaging system of claim 13, wherein the correcting means comprise a phase mask.

16. The imaging system of claim 13, wherein the correcting means comprise digital processing.

17. The imaging system of claim 1, wherein the imaging system is reversible.

18. A scanning system for producing a scan of a scene, said scan of the scene having at least one distorted zone, the scanning system comprising:

a light source;

scanning means for projecting light from the light source in a sweeping fashion across a predetermined range in a predetermined amount of time for producing said scan of the scene within a scanning field-of-view;

active optical means for orienting the projected light from the scanning means towards the scene, a configuration of the active optical means being adapted to be changed between an inactivated configuration and an activated configuration, said active optical means having a base optical power in said inactivated configuration, said active optical means including at least one modified portion formed in said active optical means in said activated configuration, each one of the at least one modified portion in said active optical means having a higher and a lower modified optical power different from the base optical power of a rest of said active optical means in said activated configuration;

said scanning field-of-view of said scanning means being kept constant in said inactivated configuration and said activated configuration; and

control means operatively connected to the active optical means for changing the configuration of the active optical means for forming therein the at least one modified portion;

wherein, said at least one distorted zone is created in said scan, in use, upon change of the configuration of the active optical means in the activated configuration by the control means, each of said at least one distorted zone having a magnified zone and a reduced zone, said magnified zone having an increased magnification higher than an original magnification and said reduced zone having a decreased magnification lower than said original magnification and a rest of said scan having said original magnification and in use, upon change of the configuration of the active optical means in the inactivated configuration by the control means, said scan has said original magnification.

19. The scanning system of claim 18, wherein the active optical means comprise a fixed form optical element.