公开(公告)号：WO1997036539A1

公开(公告)日：1997-10-09

申请号：PCT/IB1997000324

申请日：1997-04-01

Applicant: PHILIPS ELECTRONICS N.V. ,  PHILIPS NORDEN AB ,  PAPAIOANNOU, Dimitrius

Inventor： PHILIPS ELECTRONICS N.V. ,  PHILIPS NORDEN AB

IPC: A61B05/00

CPC classification number: A61B5/0091 ,  A61B5/4312

Abstract: A system for detecting an object (1) in a turbid medium (2) comprises a radiation source (3) for irradiating the turbid medium with radiation components of different wavelengths, preferably in the range between 600nm and 1 mu m. The radiation components are amplitude modulated, preferably in anti-phase. The radiation from the turbid medium is received by a photodetector (4) which is sensitive for the different wavelengths. Inhomogeneities in the turbid medium influence the superposition of the amplitude modulations at the photodetector, so that the photodetector outputs a signal that contains information on the presence and/or location of an object in the turbid medium.

Abstract translation: 用于检测浑浊介质（2）中的物体（1）的系统包括用于用不同波长的辐射成分辐射混浊介质的辐射源（3），优选在600nm和1μm之间的范围内。 辐射分量是幅度调制的，优选地是反相的。 来自混浊介质的辐射由对不同波长敏感的光电探测器（4）接收。 混浊介质中的不均匀性影响光电检测器处的​​幅度调制的叠加，使得光电检测器输出包含关于物体在混浊介质中的存在和/或位置的信息的信号。