[특허]3-Dimensional vision system utilizing coherent optical detection

3-Dimensional vision system utilizing coherent optical detection 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	G01C-003/08 G01C-001/00 G01B-011/26
출원번호	US-0589625 (1990-09-28)
발명자 / 주소	Goodwin Frank E. (Burke VA) Simonson Dana (Burke VA)
출원인 / 주소	Digital Optronics Corporation (Springfield VA 02)
인용정보	피인용 횟수 : 78 인용 특허 : 0

초록 ▼

A three-dimensional optical scanning vision system capable of producing high-resolution images in real-time includes an optical source for producing a source light beam. The source light beam is directed to a beam splitter which splits it into a local oscillator beam and a signal beam. The local oscillator beam is directed toward a photodetector, while the signal light beam is directed toward a target. Light reflected from the target is received by the beam splitter and directed toward a retroreflector which returns the beam to the beam splitter interface. Quarter wave plates and the retroreflector insure that the return light beam and the local oscillator beam are collimated and have the same polarization state. Mixing of the local oscillator beam and the return light beam occurs at the beam splitter interface, thus providing coherent optical detection by the photodetector. The photodetector thus provides an output signal providing a high degree of information about the target. The system also includes scanner optics to scan the signal light beam across the target. A processor is also included for outputting a three-dimensional image of the target, and for controlling the scanner optics.

대표청구항 ▼

A vision system for determining characteristics of a target comprising: optical source means for providing a source light beam which is linearly polarized in a first orientation; beam splitter means for splitting said source beam into a target beam and a reference beam both of which are linearly polarized in said first orientation; quarter wave plate means for converting said target beam to circular polarization in a first rotational direction and directing said target beam toward the target, and for receiving a return light beam reflected from said target which is circularly polarized in a second rotational direction opposite to said first rotational direction, said quarter wave plate means converting said return light beam to linear polarization in a second orientation perpendicular to said first orientation; retroreflector means for converting said return light beam which is linearly polarized in said second orientation to linear polarization in said first orientation and for reflecting said return beam; detector means for optical heterodyne detection of said reference and return beams which are both linearly polarized in said first orientation, and for providing an output signal including information about said scanning means for scanning said target beam across said target; and processing means for controlling said scanning.

이 특허를 인용한 특허 (78)

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A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

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연합인증

3-Dimensional vision system utilizing coherent optical detection 원문보기

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3-Dimensional vision system utilizing coherent optical detection 원문보기

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연구과제 타임라인

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