AUTHENTICATION APPARATUS, PRISM MEMBER FOR AUTHENTICATION AND AUTHENTICATION METHOD

摘要

An authentication apparatus includes a prism and an imaging unit. The prism comprises: a contact surface, an imaging surface, a first reflection surface opposed to the imaging surface, contacted with the contact surface to make an angle to be lower than an optimum angle to an incident light from a concave portion of the living body, and to reflect an incident light from a convex portion of the living body on the imaging surface and a second reflection surface opposed to the imaging surface, contacted with the first reflection surface, and to form a reflection body that reflects the incident light from the concave portion of the living body and the incident light from the convex portion of the living body on the imaging surface. The imaging unit images the light which is reflected by the first reflection surface and the light, which is reflected by the second reflection surface.

主权项

1. An authentication apparatus including a prism body, an imaging unit, and a visible light source configured to radiate a visible light to a living body,
wherein the prism body comprises:
a living body contact surface configured to be in contact with the living body;an imaging surface configured to be in contact with the living body contact surface, and to be located at the imaging unit side;a first reflection surface configured to be opposed to the imaging surface, in contact with the living body contact surface to make an angle to be lower than an optimum angle to an incident light from a concave portion of the living body, and to reflect an incident light from a convex portion of the living body on the imaging surface; anda second reflection surface configured to be opposed to the imaging surface, in contact with the first reflection surface, and to form a reflection body that reflects the incident light from the concave portion of the living body and the incident light from the convex portion of the living body on the imaging surface, wherein the imaging unit is configured to image the light, which is transmitted through the imaging surface and reflected by the first reflection surface, from the convex portion of the living body, and the light, which is transmitted through the imaging surface and reflected by the second reflection surface, from the concave portion of the living body and the convex portion of the living body.