PHYSIOLOGICAL SIGNAL DETECTING DEVICE

摘要

PROBLEM TO BE SOLVED: To improve the detecting probability of a pulse wave by improving the S/N ratio in a physiological signal detecting device equipped with a light emitting element and a photo-detecting element. SOLUTION: A pulse wave of a human body is detected by a photo-detecting element by detecting a reflected light or a scattered light from hemoglobin in the organism from among light emitted to the organism from a light emitting element 11. In this case, the light emitting element 11 is equipped with light emitting wavelength characteristics for a wavelength region wherein light absorption wavelength characteristics of hemoglobin and photo-detection sensitivity wavelength characteristics of a photo-detecting element 12 are combined. The light emitting element 11 is a light emitting diode wherein the light emitting wavelength characteristics can be converted, and its light emitting wavelength characteristics have light emitting wavelength peaks in approximately 440 nm and 550 nm.