Optical measuring instrument
AssigneesHitachi, Ltd., Hitachi Medical Corporation
InventorsYuichi Yamashita, Atsushi Maki, Fumio Kawaguchi
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AssigneesHitachi, Ltd., Hitachi Medical Corporation
InventorsYuichi Yamashita, Atsushi Maki, Fumio Kawaguchi
Estimating the term…
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.
An optical measuring instrument wherein light is applied to multiple positions of the test object, and the light passing through said test object is detected and measured thereby;
An optical measuring instrument wherein light is applied to multiple positions of the test object, and the light including multiple signal components passing through said test object is detected and measured thereby;
An optical measuring instrument wherein light of multiple wavelengths is applied to multiple positions of the test object, and the light passing through said test object is detected and measured thereby;
An optical measuring instrument characterized by comprising a means to apply light of multiple wavelengths to multiple positions of test object, and a means to detect and measure the light passing through said test object by said application of light;
Dependencies are inferred from the claim text.