Evanescent wave coupling for Fresnel direction finding
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
F42B-015/01
G02B-006/26
H01Q-001/42
F42B-015/00
출원번호
UP-0288639
(2005-11-29)
등록번호
US-7692125
(2010-05-20)
발명자
/ 주소
Williams, Brett A.
출원인 / 주소
Lockheed Martin Corporation
대리인 / 주소
Williams, Morgan & Amerson PC
인용정보
피인용 횟수 :
4인용 특허 :
5
초록▼
An apparatus includes a radome and an evanescent wave-coupled windowing system in the radome. In operation, the apparatus receives radiation reflected from an object that is incident upon a windowing system; emits evanescent waves from the windowing system whose amplitudes are proportional to the an
An apparatus includes a radome and an evanescent wave-coupled windowing system in the radome. In operation, the apparatus receives radiation reflected from an object that is incident upon a windowing system; emits evanescent waves from the windowing system whose amplitudes are proportional to the angle of incidence of the radiation; and non-coherent, Fresnel direction finds the object.
대표청구항▼
What is claimed is: 1. An apparatus, comprising: a radome; and an evanescent wave-coupled windowing system in the radome. 2. The apparatus of claim 1, wherein the radome comprises a blunt radome. 3. The apparatus of claim 2, wherein the blunt radome comprises a semi-spherical or hemispherical
What is claimed is: 1. An apparatus, comprising: a radome; and an evanescent wave-coupled windowing system in the radome. 2. The apparatus of claim 1, wherein the radome comprises a blunt radome. 3. The apparatus of claim 2, wherein the blunt radome comprises a semi-spherical or hemispherical radome. 4. The apparatus of claim 1, wherein the radome comprises a sleek radome. 5. The apparatus of claim 4, wherein the sleek radome comprises a von Karman or an Ogive radome. 6. The apparatus of claim 1, wherein the evanescent wave-coupled windowing system comprises: a pair of evanescent wave-coupled prisms; and a waveguide for receiving evanescent waves output by the prisms responsive to incident radiation. 7. The apparatus of claim 6, wherein the prisms are evanescent wave-coupled through a fluid gap, the fluid having an index of refraction less than that of prisms. 8. The apparatus of claim 7, wherein the fluid is air or a bonding agent transparent to the incident radiation. 9. The apparatus of claim 6, wherein the waveguide comprises an optical fiber, a planar waveguide, a dielectric waveguide slab, a buried channel waveguide, a strip-loaded waveguide, a ridge waveguide, a rib waveguide, or a diffused waveguide. 10. The apparatus of claim 1, wherein the windowing system comprises a windowing collar about the radome. 11. The apparatus of claim 1, wherein the windowing system comprises a plurality of windows separated about the circumference of the radome. 12. An evanescent wave-coupled windowing system, comprising: a pair of evanescent wave-coupled prisms; and a waveguide for receiving evanescent waves output by the prisms responsive to incident radiation. 13. The evanescent wave-coupled windowing system of claim 12, wherein the prisms are evanescent wave-coupled through a fluid gap, the fluid having an index of refraction less than that of the prisms. 14. The evanescent wave-coupled windowing system of claim 13, wherein the fluid is air or a bonding agent transparent to the incident radiation. 15. The evanescent wave-coupled windowing system of claim 12, wherein the waveguide comprises an optical fiber, a planar waveguide, a dielectric waveguide slab, a buried channel waveguide, a strip-loaded waveguide, a ridge waveguide, a rib waveguide, or a diffused waveguide. 16. An apparatus, comprising: a radome; an evanescent wave-coupled windowing system in the radome; a platform body to which the radome is affixed; and a plurality of electronics housed in the apparatus, receiving a plurality of evanescent waves emitted from the windowing system responsive to incident radiation, and non-coherent, Fresnel direction finding an object reflecting the incident radiation. 17. The apparatus of claim 16, wherein the radome comprises a sleek radome. 18. The apparatus of claim 17, wherein the sleek radome comprises a von Karman or an Ogive radome. 19. The apparatus of claim 16, wherein the evanescent wave-coupled windowing system comprises: a pair of evanescent wave-coupled prisms; and a waveguide for receiving evanescent waves output by the prisms responsive to incident radiation. 20. The apparatus of claim 16, wherein the windowing system comprises a windowing collar about the radome. 21. The apparatus of claim 16, wherein the windowing system comprises a plurality of windows separated about the circumference of the radome. 22. The apparatus of claim 16, further comprising means for propelling the apparatus. 23. The apparatus of claim 22, further comprising means for guiding the apparatus. 24. The apparatus of claim 23, wherein the electronics are further capable of generating guidance control signals. 25. The apparatus of claim 16, further comprising means for guiding the apparatus. 26. The apparatus of claim 25, wherein the electronics are further capable of generating guidance control signals. 27. The apparatus of claim 16, wherein the electronics are further capable of telemetering data generated by the non-coherent, Fresnel direction finding to another location. 28. A method, comprising: receiving radiation reflected from an object that is incident upon a windowing system; emitting evanescent waves from the windowing system whose amplitudes are proportional to the angle of incidence of the radiation; and non-coherent, Fresnel direction finding the object. 29. The method of claim 28, further comprising propelling an apparatus in the direction of the object. 30. The method of claim 29, further comprising guiding the apparatus in the direction of the object. 31. The method of claim 28, further comprising means for guiding the apparatus. 32. The method of claim 28, wherein the electronics are further comprising telemetering data generated by the non-coherent, Fresnel direction finding to another location.
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