| 摘要 |
<p>PURPOSE:To obtain a recorded picture of a read picture of high quality by disposing the optical axis of an image forming lens or a cylindrical lens on which laser beam scanned by a laser beam polariscope is made incident by deviating in a substantially vertical direction to a main scanning direction. CONSTITUTION:The optical axis of the image forming lens 7 is inclined and disposed so as to form a prescribed angle theta1 with respect to the optical axis of the laser beam in a plane substantially vertical to the main scanning direction of the laser beam L. By arranging in such a manner, the incident surface R1 of the image forming lens 7 is inclined with respect to the incident direction of the laser beam L, so that the reflected light returns to the beam reflecting position of a vibration mirror 6 and is not made incident and returns to a semiconductor laser element 2 and is not made incident and the deterioration in a picture quality due to a fluctuation in a light beam power resulting from the change in a laser oscillation mode can be prevented.</p> |
