Method and system for increasing the size of the area scanned by an airborne electro-optic reconnaissance system in a given time
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
G03B-015/00
G01C-011/02
H04N-003/08
출원번호
US-0813809
(2011-08-11)
등록번호
US-9063391
(2015-06-23)
우선권정보
IL-207590 (2010-08-12)
국제출원번호
PCT/IL2011/000654
(2011-08-11)
§371/§102 date
20130201
(20130201)
국제공개번호
WO2012/020413
(2012-02-16)
발명자
/ 주소
Yavin, Zvi
출원인 / 주소
RAFAEL ADVANCED DEFENSE SYSTEMS LTD.
대리인 / 주소
Venable LLP
인용정보
피인용 횟수 :
5인용 특허 :
7
초록▼
The invention relates to an airborne reconnaissance system which comprises: (a) optical unit for acquiring light rays from a terrain portion, said optical unit comprises a plurality of optical components that are positioned along an optical path and designed to maneuver said light rays to produce at
The invention relates to an airborne reconnaissance system which comprises: (a) optical unit for acquiring light rays from a terrain portion, said optical unit comprises a plurality of optical components that are positioned along an optical path and designed to maneuver said light rays to produce at a focal plane an acquired image of a terrain portion, said acquired image having an area S which is several times larger than the area A of a focal plane array which is positioned at same focal plane; (b) gimbals unit for performing a continuous back and forth across-track scanning movement of a respective line of sight formed between said optical unit and the terrain below the aircraft; (c) a first back-scanning mirror along said optical path, for compensating for said continuous across track movement of the line of sight, said compensation is performed during a respective integration period for a section of said acquired image of area S which falls during said period on said focal plane array; and (d) a second, along-track mirror also positioned along said optical path, which alternates between plurality of along track states, each state causes a different diversion of the light rays within said optical path thereby to impinge on said focal plane array another along-track section of said acquired image of area S; and (e) capturing means for recording in each state of said along-track mirror the corresponding section of the terrain image which is impinged during said state on the focal plane array.
대표청구항▼
1. An airborne reconnaissance system for use in an aircraft, comprising: a. an optical unit for acquiring light rays from a portion of a terrain below the aircraft, said optical unit comprising a plurality of optical components positioned along an optical path and arranged to maneuver said light ray
1. An airborne reconnaissance system for use in an aircraft, comprising: a. an optical unit for acquiring light rays from a portion of a terrain below the aircraft, said optical unit comprising a plurality of optical components positioned along an optical path and arranged to maneuver said light rays to produce at a focal plane an acquired image of the terrain portion, said acquired image at the focal plane having an area S several times larger than an area A of a focal plane array positioned at said focal plane;b. a gimbals unit for performing a continuous back and forth across-track scanning movement of a respective line of sight formed between said optical unit and the terrain below the aircraft;c. a first, back-scanning mirror along said optical path, for compensating for said continuous across track movement of the line of sight, said compensation being performed such that during each entire course of back or forth across track movement, a plurality of images of areas S fall and stabilize, each in its turn, on the focal plane;d. a second, along-track mirror also positioned along said optical path, which alternates, each time that an image of area S falls and stabilizes at the focal plane, between a plurality of distinct along track states, each state causing a different diversion of the light rays within said optical path thereby to impinge on said focal plane array another along-track section of said acquired image of area S; ande. capturing means for recording in each state of said along-track mirror the corresponding section of the terrain portion image impinged during said state on the focal plane array. 2. The system according to claim 1, wherein each of said first and second mirrors causes a change of diversion of the light rays due to a rotation about one respective axis of said mirror, wherein each mirror rotation is independent from the rotation of the other mirror. 3. The system according to claim 1, wherein the optical components of the optical unit comprise a plurality of lenses and at least the first and second mirrors. 4. A method for airborne reconnaissance of a terrain below an aircraft, comprising: a. acquiring, with an optical unit, light rays from a portion of the terrain below the aircraft, said optical unit comprising a plurality of optical components positioned along an optical path and arranged to maneuver said light rays to produce at a focal plane an acquired image of the terrain portion, said acquired image at the focal plane having an area S several times larger than an area A of a focal plane array positioned at said focal plane;b. performing, with a gimbals unit, a continuous across-track back and forth scanning movement of a line of sight formed between said optical unit and the terrain below the aircraft;c. compensating, with a first back-scanning mirror along said optical path, for said continuous across track movement of the line of sight, said compensation being performed such that during each of said back and forth entire movements, a plurality of images of areas S fall and stabilize, each in its turn, on the focal plane;d. causing a second, along-track mirror positioned along said optical path, to alternate, each time that an image of area S falls and stabilizes at the focal plane, between a plurality of distinct along track states, each state causing a different diversion of the light rays within said optical path to impinge on said focal plane array another along-track section of said acquired image of area S; ande. capturing and recording in each state of said along-track mirror the corresponding section of the terrain image which is impinged during said state on the focal plane array. 5. The method according to claim 4, wherein each of said first and second mirrors causes a change of diversion of the light rays due a rotation about one respective axis of said mirror, and wherein each mirror rotation is independent from the rotation of the other mirror. 6. The method according to claim 4, wherein the optical components of the optical unit comprise a plurality of lenses and at least said first and second mirrors, each of said mirrors being a single axis motorized mirror.
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이 특허에 인용된 특허 (7)
Lareau Andre G. ; Beran Stephen R. ; James Brian ; Quinn James P. ; Lund John, Autonomous electro-optical framing camera system with constant ground resolution, unmanned airborne vehicle therefor, and methods of use.
Lareau Andre G. (Bloomingdale IL) Beran Stephen R. (Mount Prospect IL) Lund John A. (McHenry IL) Pfister William R. (Schaumburg IL), Electro-optical imaging array with motion compensation.
Lareau Andre G. (Bloomingdale IL) James Brian (Buffalo Grove IL) Bennett Russell A. (McHenry IL), Electro-optical imaging array with profiled foward motion compensation.
Lareau Andre G. (Bloomingdale IL) Willey Gilbert W. (Arlington Heights IL) Bennett Russell A. (McHenry IL) Beran Stephen R. (Mount Prospect IL), Method and camera system for step frame reconnaissance with motion compensation.
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