Imaging module for biometrics authentication, biometrics authentication apparatus and prism

A biometrics authentication apparatus comprising:

• a light source irradiating a living body with light capable of passing through the living body;
• a prism wherein the light capable of passing through the living body to an incidence area included in an incidence surface of the prism, reflects two or more times inside the prism, output from an outlet surface of the prism and the incidence area works as a reflecting surface for the reflection of the light capable of passing through the living body;
• a camera module including a lens for focusing the light emerging from the outlet surface of the prism and an image pickup device for converting the light focused thereon by the lens into an electric signal and outputting the electric signal;
• and
• a housing which places the prism and the camera module at prescribed positions.