Organism information measuring apparatus and pulse-wave measuring apparatus

摘要

An organism information measuring apparatus and an arm wear type pulse-wave measuring apparatus having a sensor unit having a size that does not obstruct the exercise of a user, such as jogging, so that information about an organism, such as the pulse rate, is measured. The arm wear type pulse-wave measuring apparatus has a wrist band (12) for securing the body (10) of the apparatus to the arm of the user; and a sensor unit (30) that is put on the root of a finger by a sensor securing band (40). If the finger is irradiated with light by an LED (31) in the foregoing state, light reaches the blood vessel and light is reflected. Reflected light is received by a phototransistor (32) in such a manner that the quantity of received light corresponds to change in the quantity of blood occurring due to pulse waves of the blood. The LED is an LED capable of emitting blue light and has a light emission wavelength peak of 450 nm. The phototransistor has a light receiving wavelength region in a range from 300 nm to 700 nm. <IMAGE>