[특허]Zero blind zone doppler beam sharpening

Lockheed Martin Corporation

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특허 상세정보

MyON담기

내보내기 페이스북 공유 트위터 공유 카카오톡 공유

Zero blind zone doppler beam sharpening

특허상세정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	F42B-015/01 G01S-007/40 G01S-007/483 F42B-015/00 F41G-007/00
미국특허분류(USC)	244/003.16; 244/003.15; 244/003.19; 342/061; 342/062; 342/118; 342/134; 342/165; 342/173; 342/175; 342/195
출원번호	UP-0943750 (2004-09-17)
등록번호	US-7858910 (2011-02-24)
발명자 / 주소	Williams, Brett A
출원인 / 주소	Lockheed Martin Corporation
대리인 / 주소	Williams, Morgan & Amerson PC
인용정보	피인용 횟수 : 3 인용 특허 : 31

초록
▼

A method and apparatus for remotely sensing the content in a field of view are disclosed. The method includes transmitting a coherent optical signal into a field of view; receiving and detecting a reflection of the optical signal from a portion of the field of view bounded by the platform's boresight; correcting the first instance of the detected reflection; and resolving the content of a plurality of cells in the field of view up to the platform's boresight. The apparatus comprises a radome; an optical signal generator; an optical transmission channel; an optical receiver channel; and a plurality of electronics capable of receiving the representative signal and: correcting the first instance of the detected reflection; and resolving the content of a plurality of cells in the field of view up to the boresight from the corrected first instance of the reflection.

대표
청구항
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What is claimed is: 1. A method for remotely sensing the content in a field of view, the method comprising: transmitting a coherent optical signal into the field of view from a platform; receiving a first instance of a reflection of the optical signal from a portion of the field of view bounded by the platform's boresight; detecting the reflection in the first instance; correcting the first instance of the detected reflection; and resolving the content of a plurality of cells in the field of view up to the platform's boresight from the corrected first instance of the reflection. 2. The method of claim 1, wherein transmitting the coherent optical signal includes transmitting a coherent signal in one of the visible, ultraviolet, near infrared, medium-wave infrared, and long-wave infrared bands. 3. The method of claim 1, further comprising: receiving a second instance of the reflection from a second portion of the field of view, wherein the first and second portions are not co-extensive on both sides of the boresight; detecting the reflection in the second instance; and correcting the detected second instance of the reflection. 4. The method of claim 3, wherein the second portion is bounded by the boresight. 5. The method of claim 4, wherein detecting the second instance includes baffling the detection to bind the second portion by the boresight. 6. The method of claim 3, wherein the second portion overlaps the first portion and correcting the first instance includes performing a Doppler ambiguity correction on the first instance utilizing the overlapping second instance. 7. The method of claim 3, wherein the first and second portions of the field of view are mutually exclusive. 8. The method of claim 3, wherein resolving the content includes imaging the content. 9. The method of claim 1, wherein correcting the detected first instance of the reflection includes performing a Fresnel correction, filtering noise, or both performing a Fresnel correction and filtering noise. 10. The method of claim 1, further comprising guiding the platform to a target responsive to the resolution of the cells. 11. The method of claim 1, wherein the boresight is co-aligned with a direction of motion for the platform. 12. A method for remotely sensing the content in a field of view, the method comprising: transmitting a coherent optical signal into the field of view from a platform; receiving a first instance of a reflection of the optical signal from a first portion of the field of view, the first portion extending on both sides of the platform's boresight; receiving a second instance of the reflection of the optical signal on the same side of the boresight as the first instance, the second instance covering a second portion of the field of view overlapping the first portion and bounded by the platform's boresight; detecting the reflection in the first and second instances: performing Fresnel corrections on the first and second instances; and performing a Doppler ambiguity correction on the Fresnel amplitude corrected first instance utilizing the overlapping Fresnel amplitude corrected second instance. 13. The method of claim 12, wherein transmitting the coherent optical signal includes transmitting a coherent signal in one of the visible, ultraviolet, near infrared, medium-wave infrared, and long-wave infrared bands. 14. The method of claim 12, wherein detecting the second received instance includes baffling the detection to bind the second portion by the boresight. 15. A method for remotely sensing the content in a field of view, the method comprising: transmitting a coherent optical signal into the field of view from a platform; receiving at least a first instance of a reflection of the optical signal from a first portion of the field of view; and detecting the reflection in the first instance; resolving the content of a plurality of cells in the Doppler beam sharpening blind zone in the field of view from the at least first instance of the reflection. 16. The method of claim 15, wherein transmitting the coherent optical signal includes transmitting a coherent signal in one of the visible, ultraviolet, near infrared, medium-wave infrared, and long-wave infrared bands. 17. The method of claim 15, further comprising: receiving a second instance of the reflection from a second portion of the field of view, wherein the first and second portions are not co-extensive on both sides of the boresight; and correcting the detected second instance of the reflection. 18. The method of claim 15, further comprising correcting the detected first instance of the reflection. 19. The method of claim 15, further comprising guiding the platform to a target responsive to the resolution of the cells. 20. The method of claim 15, wherein the boresight is co-aligned with a direction of motion for the platform. 21. An apparatus, comprising: a radome; an optical signal generator that, in operation, generates an optical signal; an optical transmission channel for the optical signal through the radome, the optical transmission channel defining a boresight for the apparatus; an optical receiver channel through which a first instance of a reflection of the optical signal may be received, the sensed portion of the field of view for the optical receiver channel being bound by the boresight and outputting a signal representative of the first instance of the reflection; and a plurality of electronics that, in operation, receives the representative signal and: correcting the first instance of the detected reflection; and resolving the content of a plurality of cells in the field of view up to the boresight from the corrected first instance of the reflection. 22. The apparatus of claim 21, wherein the radome is raked. 23. The apparatus of claim 21, wherein the optical signal generator, in operation, generates the optical signal in one of the visible, ultraviolet, near infrared, medium-wave infrared, and long-wave infrared bands. 24. The apparatus of claim 23, wherein the optical signal generator comprises includes a laser. 25. The apparatus of claim 21, wherein the optical signal generator comprises includes a laser. 26. The apparatus of claim 21, wherein the optical signal generator is housed in the radome. 27. The apparatus of claim 21, wherein the optical receiver channel comprises a direct optical channel. 28. The apparatus of claim 27, wherein the direct optical receiver channel includes: a window in the radome; a photodetector that, in operation, detects the first instance of the reflection received through the window and generating the representative signal; and a light tube between the window and the photodetector through which the reflection propagates to the photodetector. 29. The apparatus of claim 21, wherein the optical receiver channel includes: a window in the radome; a photodetector that, in operation, detects the first instance of the reflection received through the window and generating the representative signal; and a light tube between the window and the photodetector through which the reflection propagates to the photodetector. 30. The apparatus of claim 29, wherein the window comprises one of a dedicated window and a portion of a collar. 31. The apparatus of claim 21, wherein the optical receiver channel comprises an indirect optical channel. 32. The apparatus of claim 31, wherein the indirect optical channel comprises: a window in the radome; a photodetector that, in operation, detects the first instance of the reflection and generating the representative signal; a mirror reflecting the first instance of the reflection received through the window to the photodetector; and a light tube between the window and the photodetector through which the first instance of the reflection propagates from the mirror to the photodetector. 33. The apparatus of claim 21, wherein the optical channel comprises: a window in the radome; a photodetector that, in operation, detects the first instance of the reflection and generating the representative signal; a mirror reflecting the first instance of the reflection received through the window to the photodetector; and a light tube between the window and the photodetector through which the first instance of the reflection propagates from the mirror to the photodetector. 34. The apparatus of claim 33, wherein the window comprises one of a dedicated window and a portion of a collar. 35. The apparatus of claim 21, wherein the electronics include: a processor; a storage encoded with: a data structure in which data from the representative signal is stored; and an application that, when invoked by the processor, performs the correction and resolution on the data. 36. An apparatus, comprising: a radome; an optical signal generator that, in operation, generates an optical signal; an optical transmission channel for the optical signal through the radome, the optical transmission channel defining a boresight for the apparatus; a first optical receiver channel through which a first instance of a reflection of the optical signal may be received, the first sensed portion of the field of view for the first optical receiver channel extending on both sides of the platform's boresight; a second optical receiver channel through which a second instance of the reflection may be received, the second sensed portion of the field of view for the second optical receiver channel overlapping the first portion and bounded by the platform's boresight; and a plurality of electronics that, in operation: performs Fresnel corrections on the first and second instances; and performs a Doppler ambiguity correction on the Fresnel amplitude corrected first instance utilizing the overlapping Fresnel amplitude corrected second instance. 37. The apparatus of claim 36, wherein the radome is raked. 38. The apparatus of claim 36, wherein the optical signal generator, in operation, generates the optical signal in one of the visible, ultraviolet, near infrared, medium-wave infrared, and long-wave infrared bands. 39. The apparatus of claim 36, wherein the first optical receiver channel, the second optical receiver channel, or both the first and second optical receiver channels comprises a direct optical channel. 40. The apparatus of claim 36, wherein the optical receiver channel includes: a window in the radome; a photodetector that, in operation, detects the first instance of the reflection received through the window and generating the representative signal; and a light tube between the window and the photodetector through which the reflection propagates to the photodetector. 41. The apparatus of claim 36, wherein the optical receiver channel comprises an indirect optical channel. 42. The apparatus of claim 36, wherein the optical channel comprises: a window in the radome; a photodetector that, in operation, detects the first instance of the reflection and generating the representative signal; a mirror reflecting the first instance of the reflection received through the window to the photodetector; and a light tube between the window and the photodetector through which the first instance of the reflection propagates from the mirror to the photodetector. 43. The apparatus of claim 36, wherein the electronics include: a processor; a storage on which resides: a data structure in which data from the representative signal is stored; and an application that, when invoked by the processor, performs the correction and resolution on the data.

이 특허에 인용된 특허 (31)

이 특허를 인용한 특허 피인용횟수: 3

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특허 상세정보

Zero blind zone doppler beam sharpening

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Zero blind zone doppler beam sharpening

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이 특허에 인용된 특허 (31)

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