Patent ID: 6577453
Filing Date: 2003-06-10
Classification: G01T

Abstract:
An image reading apparatus comprising at least one laser stimulating ray source for emitting a laser beam, a stage on which an image carrier can be placed, a light detecting means for photoelectrically detecting light released from the image carrier, and an optical head for condensing the laser beam emitted from the at least one laser stimulating ray source onto the image carrier placed on the stage and condensing light released from the image carrier to lead it to the light detecting means, the optical head being constituted to be two-dimensionally movable in a plane parallel to the stage and said image reading apparatus being further provided with a perforated mirror fixed in a path of the laser beam and formed with a hole at a center portion thereof, the perforated mirror being disposed so that the laser beam emitted from the at least one laser stimulating ray source can pass through the hole thereof and light released from the image carrier and condensed by the optical head can be reflected by the perforated mirror in such a manner that a path of the light is branched off from the path of the laser beam emitted from the at least one laser stimulating ray source and advancing to the optical head.