Claims
- 1. An optical system comprising
a blurring array comprising a substrate having thereon a surface array of blurlets, wherein at least one of
the foci of the blurlets, and the optical phases of the blurlets at a nominal focal surface location varies in a pseudorandom but deterministic manner.
- 2. The optical system of claim 1, wherein both the foci of the blurlets and the optical phases of the blurlets at the nominal focal surface location varies in the pseudorandom but deterministic manner.
- 3. The optical system of claim 1, wherein the substrate is made of a material transmissive to a waveband of incident optical energy.
- 4. The optical system of claim 1, wherein the blurlets are lenslets that refract incident optical energy.
- 5. The optical system of claim 1, wherein the blurlets are mirrorlets that reflect incident optical energy.
- 6. The optical system of claim 1, wherein the optical system further includes
a detector lying at about the nominal focal surface location, and an optics system that focuses optical energy from a scene onto the detector.
- 7. The optical system of claim 6, wherein the detector is an infrared detector.
- 8. The optical system of claim 1, wherein the foci of the blurlets are at locations relative to the nominal focal surface location that are randomly selected from a set of values defined by a truncated distribution.
- 9. The optical system of claim 1, wherein the blurlets are surfaces each defined by a curvature and an axial offset, and wherein at least one of the curvature and the axial offset of each blurlet is a value that is randomly selected from a set of values defined by a respective truncated distribution.
- 10. The optical system of claim 1, wherein the blurlets are surfaces each defined by a curvature and an axial offset, and wherein both the curvature and the axial offset of each blurlet is a value that is randomly selected from a set of values defined by a respective truncated distribution.
- 11. The optical system of claim 1, wherein the optical phases of the blurlets at the nominal focal surface location are randomly selected from a set of values defined by a truncated distribution.
- 12. An optical system comprising
a blurring array comprising a substrate having thereon a surface array of blurlets, wherein the blurlets are surfaces each defined by a curvature and an axial offset from a nominal focal surface location, and wherein at least one of the curvature and the axial offset of each blurlet is a value that is randomly selected from a set of values defined by a respective distribution.
- 13. The optical system of claim 12, wherein the substrate is made of a material transmissive to a waveband of incident optical energy.
- 14. The optical system of claim 12, wherein the blurlets are lenslets that refract incident optical energy.
- 15. The optical system of claim 12, wherein the blurlets are mirrorlets that reflect incident optical energy.
- 16. The optical system of claim 12, wherein the optical system further includes
a detector lying at about the nominal focal surface location, and an optical system that focuses optical energy from a scene onto the detector.
- 17. The optical system of claim 16, wherein the detector is an infrared detector.
- 18. The optical system of claim 12, wherein the respective distributions are each truncated distributions.
- 19. The optical system of claim 12, wherein both the curvature and the axial offset of each blurlet is a value that is randomly selected from a set of values defined by a respective distribution.
- 20. The optical system of claim 12, wherein both the curvature and the axial offset of each blurlet is a value that is randomly selected from a set of values defined by a respective truncated distribution.
Government Interests
[0001] This invention was made with government support under contract No. N00019-97-C-0027 awarded by Naval Air Systems Command. The government has certain rights in this invention.