BIOLOGICAL INFORMATION MEASURING INSTRUMENT AND PULSE WAVE MEASURING INSTRUMENT

摘要

PROBLEM TO BE SOLVED: To provide an optical information detector and a pulse wave measuring instrument capable of reducing restrictions of a using condition without a large-scale light shielding structure. SOLUTION: For the pulse wave measuring instrument, an instrument main body is mounted to an arm with a wrist band and a detector 30 is mounted to a finger with a band for fixing a sensor. At the time of irradiating light toward the finger from LED 31, this light reaches a blood vessel to be reflected. The reflected light is received by a phototransistor 32 and the received light quantity corresponds to the variation of a blood quantity generated by the pulse wave of blood. In this case, an LED 31 uses a blue LED and its light emitting wavelength peak is 450 nm. The received light wavelength area of the phototransistor 32 is in a wavelength area from 300 nm to 600 nm.