[특허]FPA combining SAL and imaging

Lockheed Martin Corporation

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특허 상세정보

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내보내기 페이스북 공유 트위터 공유 카카오톡 공유

FPA combining SAL and imaging

특허상세정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	G01J-005/02
미국특허분류(USC)	250/339.02
출원번호	UP-0276233 (2008-11-21)
등록번호	US-7858939 (2011-02-24)
발명자 / 주소	Tener, Gene D. Goodnough, Mark Puchaty, David J.
출원인 / 주소	Lockheed Martin Corporation
대리인 / 주소	Birch, Stewart, Kolasch & Birch, LLP
인용정보	피인용 횟수 : 9 인용 특허 : 1

초록
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A multi-mode detector and detection method that utilize shared optical components to detect multiple different incoming wavelengths of energy. Partial de-focusing of incoming light enables imaging and non-imaging outputs from the same detector. Analog and digital pixels enable mixed-mode output. Selective filtering at the detector enables the simultaneous detection of two or more wavelengths of light. Signal processing hardware and algorithms enable the system to simultaneously provide integrated and multi-channel analog outputs to guidance and display s...

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The invention claimed is: 1. An imaging device for simultaneous multiple-wavelength electro-optical radiation detection using a single detector, said device comprising: a detector that detects incoming photons, the detector being composed of pixels wherein the pixels comprise at least one imaging pixel and at least one analog pixel; a read-out integrated circuit operatively connected to the detector, wherein the read-out integrated circuit (ROIC) comprises: an imaging portion operatively connected to the at least one imaging pixel such that the imaging portion generates integrated digital imaging output from the at least one imaging pixel; and an analog output portion operatively connected to the at least one analog pixel wherein the analog output portion comprises at least one analog output channel generating non-sampled, analog output from the at least one analog pixel. 2. The imaging device of claim 1 further comprising: a patterned waveband filter disposed on top of the detector such that the waveband filter covers the pixels of the detector, wherein the waveband filter is comprised of distinct filter regions such that a filter region covers at least one pixel of the detector; and further wherein each distinct filter region corresponds to a specific electro-optical radiation (EOR) wavelength band, permitting radiation in that wavelength band to pass through that filter region for detection. 3. The imaging device of claim 2, wherein the detector further comprises a plurality of the imaging pixels and a plurality of the analog pixels where the imaging and analog pixels alternate on the detector in a checkerboard pattern; and further wherein the patterned waveband filter is in a checkerboard pattern that comprises alternating, pixel-sized areas of a first filter region and a second filter region, such that the imaging pixels are covered by areas of the first filter region and the analog pixels are covered by areas of the second filter region. 4. The imaging device of claim 3, wherein the wavelength band of the first filter region is mid-wave infra-red and wherein the wavelength band of the second filter region corresponds to wavelengths used in a semi-active laser system. 5. The imaging device of claim 1, wherein the detector further comprises four non-overlapping pixel regions such that each pixel region contains at least one analog pixel; and further wherein the analog output portion comprises four analog output channels such that an analog output channel is operatively connected to the at least one analog pixel of a pixel region. 6. The imaging device of claim 5, further comprising: a signal thresholding and logic device for analyzing the output of each analog channel wherein said thresholding and logic device comprises: a determining unit that determines whether a valid signal is detected; and a calculating unit that calculates the centroid of a valid incident signal. 7. The imaging device of claim 1, further comprising: a beam spoiler optically coupled to the detector, wherein the beam spoiler selectively de-focuses certain wavelengths of incoming electro-optical radiation (EOR) before they are projected onto the detector. 8. The imaging device of claim 7, wherein the beam spoiler selectively de-focuses EOR wavelengths associated with a non-imaging portion of an incoming signal. 9. The imaging device of claim 7, wherein the beam spoiler comprises a dichroic or holographic element. 10. The imaging device of claim 1, wherein the at least one analog pixel is a single analog pixel located in the center of the detector, and further wherein the analog pixel is in the shape of a ‘plus’ sign. 11. The imaging device of claim 1 further comprising: a patterned polarization filter disposed on top of the detector such that the polarization filter covers the pixels of the detector wherein the polarization filter is comprised of distinct filter regions such that each filter region covers at least one pixel of the detector; and further wherein each distinct filter region corresponds to a specific electro-optical radiation (EOR) polarization, permitting radiation of that polarization to pass through that filter region for detection. 12. The imaging device of claim 1, further comprising: at least one filtering and amplification module operatively connected to the analog output portion, wherein the filtering and amplification module filters out background noise from the analog output and amplifies the remaining signal. 13. The imaging device of claim 12, the at least one filtering and amplification module comprising an alternating-current coupling. 14. The imaging device of claim 13, wherein each non-imaging pixel of the detector has a separate output channel operatively connected to an AC coupling contained within the filtering and amplification module. 15. The imaging device of claim 12, wherein the filtering and amplification module is disposed within the ROIC. 16. The imaging device of claim 1, further comprising: an adaptive integration timer operatively connected to the at analog output portion such that the analog output is used by the adaptive integration timer to adjust the integration time of the imaging pixels on the ROIC. 17. The imaging device of claim 1, wherein the at least one analog pixel comprises a component of a laser range-finder. 18. A method for simultaneous multiple-wavelength electro-optical radiation detection using a single detector, the method comprising: detecting incoming photons with a detector, the detector being composed of pixels wherein the pixels comprise at least one imaging pixel and at least one analog pixel; outputting detection results through a read-out integrated circuit (ROIL), wherein outputting detection results comprises: generating integrated digital imaging output from the at least one imaging pixel with an imaging output unit; and generating non-sampled, analog output from the at least one analog pixel with an analog output portion, wherein the analog output portion comprises at least one analog output channel. 19. The method of claim 18 further comprising: filtering incoming photons with a patterned waveband filter comprised of distinct filter regions such that each filter region covers at least one pixel of the detector, wherein each distinct filter region corresponds to a specific electro-optical radiation (EOR) wavelength band, permitting radiation in that wavelength band to pass through that filter region for detection. 20. The method of claim 19, further comprising: alternating imaging and analog pixels on the detector in a checkerboard pattern; and covering the pixels of the detector with said patterned waveband filter such that the imaging pixels are covered by filter regions corresponding to a first EOR wavelength band and the analog pixels are covered by filter regions corresponding to a second EOR wavelength band. 21. The method of claim 20, wherein the wavelength band of the first filter region is mid-wave infra-red and wherein the wavelength band of the second filter region is semi-active laser. 22. The method of claim 18, further comprising: selectively de-focusing certain wavelengths of incoming EOR before they are projected onto the detector. 23. The method of claim 22, wherein selectively de-focusing comprises selectively de-focusing EOR wavelengths associated with a non-imaging portion of an incoming signal. 24. The method of claim 18, further comprising: thresholding and analyzing the output of each analog channel; wherein thresholding and analyzing further comprises determining whether a valid signal is detected; and calculating the centroid of a valid incident signal. 25. The method of claim 18, further comprising: disposing the at least one analog pixel in the center of the detector; and performing range-finding with said at least one analog pixel. 26. The method of claim 18 further comprising: filtering incoming photons with a patterned polarization filter comprised of distinct filter regions such that each filter region covers at least one pixel of the detector, wherein each distinct filter region corresponds to a specific electro-optical radiation (EOR) polarization, permitting radiation of that polarization to pass through that filter region for detection. 27. The method of claim 18, further comprising: filtering and amplifying the analog output with at least one filtering and amplification module, wherein filtering comprises filtering out background noise and amplifying comprises amplifying the remaining signal. 28. The method of claim 18, further comprising: adjusting imaging integration time by using the analog output to determine an integration time for the imaging pixels on the ROIC. 29. The method of claim 18, wherein generating non-sampled analog output further comprises: generating filtered and amplified non-sampled analog output from each non-imaging pixel; and outputting the filtered and amplified non-sampled analog output from each non-imaging pixel on a separate output channel. 30. An imaging device for simultaneous multiple-wavelength electro-optical radiation detection using a single detector, said device comprising: a detector that detects incoming photons, the detector being composed of pixels wherein the pixels comprise imaging pixels and analog pixels and further wherein the imaging and analog pixels are disposed on the detector in an alternating, checkerboard pattern; a read-out integrated circuit operatively connected to the detector, wherein the read-out integrated circuit (ROIC) comprises: an imaging portion operatively connected to the imaging pixels such that the imaging portion generates integrated digital imaging output from the imaging pixels; and an analog output portion operatively connected to the analog pixels wherein the analog output portion comprises four analog output channels, each channel corresponding to a non-overlapping quadrant of the detector and generating non-sampled, analog output from the analog pixels in that quadrant; a patterned waveband filter disposed on top of the detector, wherein the waveband filter is comprised of alternating, pixel-sized areas of first and a second filter regions, such that areas of the first filter region cover the imaging pixels of the detector and areas of the second filter region cover the analog pixels of the detector; and further wherein the first filter region corresponds to a first, imaging electro-optical radiation (EOR) wavelength band, permitting radiation in the first wavelength band to pass through the first filter region for detection, and the first second region corresponds to a second, non-imaging EOR wavelength band, permitting radiation in the second wavelength band to pass through the second filter region for detection; a beam spoiler optically coupled to the detector, wherein the beam spoiler selectively de-focuses the non-imaging wavelengths of incoming EOR before they are projected through the filter and onto the detector; and a filtering and amplification module operatively connected to the analog output portion, wherein the filtering and amplification module filters out background noise from the analog output and amplifies the remaining signal.

이 특허에 인용된 특허 (1)

Schramek,Robert J.; Byrd,Ronald E.; Weinstein,Michael E.; Kim,Seong Hwoon; Lyon,Allan J.. Dual mode target sensing apparatus. USP2007027183966.

이 특허를 인용한 특허 피인용횟수: 9

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FPA combining SAL and imaging

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FPA combining SAL and imaging

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