Patent ID: 8913119
Filing Date: 2014-12-16
Classification: A61B,G06K,H04N

Abstract:
1. A short distance iris recognition camera comprising: a sensor and appendant circuits, a lens, a lighting source including a white light source and a lighting IR LED, and a prism, and wherein the lighting source is spaced apart from a lens center line of the lens in a first direction by a first predetermined distance D, wherein an object plane of the lens is a location at which an iris is placed, is spaced apart from an end of the lens in a second direction orthogonal to the first direction by a second predetermined distance L, and occupies a region around the lens center line, wherein an imaging surface of the lens is an image sensor surface, and wherein a lighting center line is formed to have an inclined lighting angle corresponding to an arc tangent of said first predetermined distance D to said second predetermining distance L with the lens center line of the lens to be oriented to the object plane of the lens, wherein the lighting source is disposed to have an orientation in parallel with or approximately in parallel with the lens center line of the lens, and wherein the prism is disposed to be spaced apart from the lens center line of the lens in a light path of the lighting source and to irradiate the object plane in an inclined manner so as to give said lighting center line of light from the lighting source said inclined lighting angle.