| 摘要 |
PURPOSE:To reduce the titled device in size and production cost by synthesizing two laser light rays straightly polarized in the rectagular direction each other by a polarized light synthesizing means and then making the polarized laser light rays incident on a deflecting means and a scanning lens. CONSTITUTION:The 1st laser light projected from the 1st laser light source 1 and modulated at its luminance by a signal to be recorded is made parallel light flux by a collimater lens 2 and then the parallel light flux is made incident on the polarized light synthesizing means 3. A beam expander 6 is arranged between the 2nd laser light source 4 and the polarized light synthesizing means 3 so that the size of two beam spots projected to a scanning recording surface is made equal to each other. The synthesized laser light is made incident on a deflecting means 7 consisting of a polyhedral mirror and rotated as shown by the arrow to deflect the incident light repeatedly in the main scanning direction and the reflected laser light is projected as a spot on a prescribed scanning recording surface 9 by a scanning lens 8. |
