Authentication apparatus and prism member for authentication
AssigneeNEC Corporation
InventorTeruyuki Higuchi
Life of this patent
Estimating the term…
Abstract
An authentication apparatus comprises a prism member, an imaging unit, and a visible light source configured to radiate visible light to a living body. The prism member has a substantially trapezoidal shape with at least one side face thereof formed in an expanded shape from a living body authentication face against which an authentication portion of the living body is put, toward an imaging face that is parallel to the living body authentication face. The visible light source is disposed below the imaging face and near a side of an expanded side of the imaging face. The imaging unit is disposed below the imaging face.
Claims6
An authentication apparatus comprising a prism member, an imaging unit, and a visible light source that radiates visible light to a living body, wherein:
- said prism member has a substantially trapezoidal shape with at least one first side face thereof formed in an expanded shape from a living body authentication face against which an authentication portion of said living body is put, toward an imaging face that is parallel to said living body authentication face,
- said prism member comprises a reflection face that is a second side face that is not opposed to said first side face and that totally reflects light reflected by said living body authentication face toward said imaging face,
- said visible light source is disposed below said imaging face and near a side of an expanded side of said imaging face, and
- said imaging unit is disposed below said imaging face, and captures living-body reflected light in which light radiated from said visible light source is reflected by an authentication portion of said living body in contact with said living body authentication face and reflection face reflected light in which said living-body reflected light is reflected by said reflection face.
An authentication method using an authentication apparatus, said authentication apparatus comprising a prism member, an imaging unit, and a visible light source that radiates visible light to a living body, wherein:
- said prism member has a substantially trapezoidal shape with at least one first side face thereof formed in an expanded shape from a living body authentication face against which an authentication portion of said living body is put, toward an imaging face that is parallel to said living body authentication face,
- said prism member comprises a reflection face that is a second side face that is not opposed to said first side face and that totally reflects light reflected by said living body authentication face toward said imaging face,
- said visible light source is disposed below said imaging face and near a side of an expanded side of said imaging face, and
- said imaging unit is disposed below said imaging face,
- the authentication method comprising:
- capturing living-body reflected light in which light radiated from said visible light source is reflected by an authentication portion of said living body in contact with said living body authentication face and reflection face reflected light in which said living-body reflected light is reflected by said reflection face.
Dependencies are inferred from the claim text.