| 摘要 |
PROBLEM TO BE SOLVED: To provide an image reader improved in constant velocity performance and providing an excellent diagnostic image free from image irregularity. SOLUTION: The image reader is equipped with: an optical unit 1 irradiating a photostimulable phosphor plate P with exciting light L1 from the light source while scanning it, condensing stimulated luminescence emitted from the photostimulable phosphor plate P and photoelectrically converting it to read image information; a linear motor 7 moving the optical unit 1; a wire 6 moving together with the optical unit 1; a pulley 52 to which the movement of the optical unit 1 is transmitted through the wire 6 to rotate; a rotary encoder 51 detecting the rotational speed of the pulley 52; and a control means 100 controlling the linear motor 7 from the result of detection by the rotary encoder 51. The wire 6 is inclined to have a prescribed angle to an orthogonal line A to the rotary shaft of the pulley 52 and wound round the shaft of the pulley 2 by one or more turns. COPYRIGHT: (C)2007,JPO&INPIT
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