Patent ID: 8224040

Claim:
A face recognition apparatus based on even light source, comprising a data processor ( 1 ), an imaging device ( 2 ) used to capture a face image and transport the face image to said data processor ( 1 ) for image processing, and an optical device ( 3 ) used to form an image of human face onto said imaging device ( 2 ); wherein said optical device ( 3 ) comprises a camera lens ( 4 ) and an even light source device ( 5 ) located near or surrounding said camera lens ( 4 ); said even light source device ( 5 ) comprises a light emitter ( 6 ) and an even light source generation device ( 7 ) which is used to generate indirect even light source by means of refraction, diffraction or reflection of light emitted by said light emitter ( 6 ); wherein said even light source generation device ( 7 ) comprises a specular reflection cavity ( 410 ), and said light emitter ( 6 ) is mounted on a light emitting plate ( 406 ) located at the bottom of said specular reflection cavity ( 410 ); wherein inner surface of said specular reflection cavity ( 410 ) is made of metal materials which can enable specular reflection; said specular reflection cavity ( 410 ) further comprises a main reflector ( 407 ) to guide light emitted by said light emitting plate ( 406 ) and light reflected by said specular reflection cavity ( 410 ) into a direction to which said camera lens ( 4 ) points.