| 摘要 |
PURPOSE:To concentrically blow off collected air currents to the surface of a lens and to clean the surface of the lens without damaging by providing a rectification part on an optical head. CONSTITUTION:The rectification part 3 having a U-shaped cross section collects the air currents W generated with the rotation of a disk D in a direction R and makes them flow to an objective lens 2. Therefore, by contracting the air currents W by the rectification part 3, the air currents are efficiently blown off to the objective lens 2 and dust or dirt stuck to the surface of the lens 2 is removed by the power of the air which is blown off, then the clouding of the lens 2 is also removed. |
