Patent ID: 8019126

Claim:
A biometric data acquisition device for acquiring data of a living body by irradiating the living body with light, comprising: a light source unit emitting light to the living body, an intensity of the light from the light source unit being defined by a curve expressed by a predetermined formula, the curve being a function of time; a plurality of light receiving elements receiving one of transmitted light and reflected light, the transmitted light and the reflected light being transmitted through the living body and reflecting from the living body, respectively, by irradiating the living body with the light from the light source unit; an openable and closable gate provided for each of the plurality of light receiving elements; and an opening and closing control unit controlling opening and closing of the gate so as to make uniform an intensity of light received by the plurality of light receiving elements, a timing of the opening and closing of the gate being controlled based on the intensity of the light from the light source unit and a distance between the light source unit and each of the plurality of light receiving elements.