Dispositif et méthode pour la détermination de la concentration de differentes types de hemoglobine par application d'une pression élevée au tissu vivant et par mesure de la différence de l'attenuation de lumière à des longueurs d'ondes différentes
A biological signal measuring system includes: a light emitter emitting light beams having different N kinds of wavelengths, where N is an integer of four or more； a light receiver, a processor and an outputting section outputting (N-1) identified concentrations. Light attenuations A1, A2, A3,...,An are acquired based on changes of the received light intensities due to pressing of a living tissue at each of the N different wavelengths.The concentrations of the N-1 different components are obtained from differences of light attenuation at different wavelengths, namely A2-A1, A3-A1, etc.
