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专利名称：Optical device for determining the
longitudinal and angular position of arotationally symmetrical apparatus
发明人：Vecerina, Ivan,Bétrisey, Stéphane,Zoethout,
Jurjen
申请号：EP03405694.5申请日：20030922公开号：EP1517119B1公开日：20080409
摘要：A device for determining the longitudinal and angular position of a rotationallysymmetrical apparatus (3) when guided inside a longitudinal element surrounding thesame, including an imaging optical navigation sensor that measures the motion of theunderlying surface by comparing successive images, and translates this image translationinto a measurement of the longitudinal and rotational motion of the instrument. Featuresof the captured image are used to identify the insertion or withdrawal of the instrument,and to identify specific areas of the moving surface passing underneath the sensor,therefore allowing to establish the absolute position of the instrument, or to identifywhich instrument was inserted or in what cavity a tracking instrument was inserted. Thedevice comprises a light source (31) and a light detector (32). Light emitted by said lightsource (31) is directed onto a surface (13) of the rotationally symmetrical apparatus (3).Reflected light from said surface (13) is detected by said light detector (32) to produce aposition signal showing a locally varying distribution in the longitudinal direction (21) andin the peripheral direction (22) to enable said precise position and angular measurement.
申请人：XITACT SA
地址：CH
国籍：CH
代理机构：Richard, François-Régis
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