Claims
- 1. An optical system comprisinga blurring array comprising a substrate having thereon a surface array of blurlets, wherein each blurlet has a focus and an optical phase, and 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 hut 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 vary . 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 includesa 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 comprisinga 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 includesa 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
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.
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