| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a driving control method for a movable mirror for a bar code reader which can make a device small-sized and improve the reliability of movable mirror driving operation. <P>SOLUTION: In the driving control method for the movable mirror for the bar code reader which reflects the laser light Lb projected by a light emitting element 35 by the movable mirror 37, swings the movable mirror 37 to scan an irradiated object with the laser light Lb, and reflects the return light from the irradiated object by the movable mirror 37 to make a light receiving element receives it, an optical detector 45 detects the laser light Lb which is projected by the light emitting element 35 and reflected by the movable mirror 37 and the phase difference of the movable mirror 37 is detected from the detected value to drive and control a driving coil 41 which drives the movable mirror 37 according to the phase difference. <P>COPYRIGHT: (C)2004,JPO |
