发明名称 |
Optical measuring instrument |
摘要 |
A highly reliable optical measuring instrument for multi-channel simultaneous measurement has an intensity of light emitted from a light source modulated at different frequencies and the light is applied to multiple positions of a test object. The light which is detected from the test object is converted into electric signals by a photodiode, and modulation signals are detected by a lock-in amplifier module. The signals are processed as information on the test object interior by a processing unit. Light is applied sequentially from a light source in a preparatory measurement step prior to final measuring, and the signal level of the detection light is measured for each light applied position. A control unit controls light intensity and detection signal level to ensure that the difference in detection light levels is kept within a specified range.
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申请公布号 |
US6611698(B1) |
申请公布日期 |
2003.08.26 |
申请号 |
US20010807478 |
申请日期 |
2001.05.24 |
申请人 |
HITACHI, LTD.;HITACHI MEDICAL CORPORATION |
发明人 |
YAMASHITA YUICHI;MAKI ATSUSHI;KAWAGUCHI FUMIO |
分类号 |
A61B10/00;A61B5/00;A61B5/145;G01N21/27;G01N21/49;(IPC1-7):A61B5/00 |
主分类号 |
A61B10/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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