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NTIS 바로가기국가/구분 | United States(US) Patent 등록 |
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국제특허분류(IPC7판) |
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출원번호 | US-0377642 (1989-07-10) |
발명자 / 주소 |
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출원인 / 주소 |
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인용정보 | 피인용 횟수 : 12 인용 특허 : 2 |
The invention is directed to targets for use where precise alignment and location measurements on an object is required. Several embodiments of the invention are described. The targets have at least a portion of their outer surface curvilinear. The target is supported on a convex supporting surface
A target for precision location measurement comprising: target means having a curvilinear surface thereon; a support means for positioning and holding said curvilinear surface of said target means at a selected location; a base means by which said support means is supported adapted to be positioned
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