Apparatus and method for adjusting focus position in iris recognition system

A method for adjusting a focus position in an iris recognition system, the method comprising:

• irradiating at least one designated spot image on a user using a light beam, of which an irradiation axis intersects with respect to an iris recognition camera;
• acquiring user images including the irradiated at least one designated spot image by using the iris recognition camera;
• and
• calculating the distance between the user and the iris recognition camera based on characteristics of the at least one designated spot image that is extracted from the acquired user images.

An apparatus for adjusting a focus position in an iris recognition system, the apparatus comprising:

• an iris recognition camera, which photographs user images;
• a plurality of distance detection pointers in symmetric positions with respect to the iris recognition camera, which projects light to form spot images on a user;
• and
• a distance calculator, which calculates the distance between the user and the iris recognition camera by performing an image process analysis on the user images, which have been photographed by the iris recognition camera and which have been projected by the distance detection spot light, wherein the distance calculation is based on the spot images on the user images.

A method for an iris recognition system, the method comprising:

• forming a light image on a user using a light beam;
• taking a picture of the light image using a camera;
• extracting the light image from the picture;
• and
• determining the distance between the user and the camera based on at least one characteristic of the extracted light image adjusting the focus position in the iris recognition system using the determined distance.