Patent ID: 8750951
Filing Date: 2014-06-10
Classification: A61B

Abstract:
1. A living body optical measurement system, comprising: a plurality of light irradiating units each respectively including a code generating unit configured to generate a distinct modulation code from a plurality of modulation codes that are based on Hadamard codes, a modulating unit for generating an intensity modulated signal modulated by the distinct modulation code generated by the code generating unit of the light irradiating unit, and a light source blinking according to the intensity modulated signal supplied from the modulating unit of the light irradiating unit; a light detecting unit for detecting light that is transmitted through a living body irradiated with the light sources contained in the plurality of light irradiating units and outputting an electric signal; and a signal processing unit for computing correlations between the electric signal output by the light detecting unit and a plurality of modulation codes that are respectively equivalent to the distinct modulation codes generated by the respective modulating units of the plurality of light irradiating units, and wherein each of the plurality of modulation codes has a distinct bit sequence that is shifted from an original bit sequence of a corresponding Hadamard code by n/2 bits, where ‘n’ is a bit cycle of the original bit sequence of the corresponding Hadamard code for the modulation code.