| 摘要 |
PURPOSE: To provide an optical head device sufficient in productivity and capable of removing dusts deposited on the surface of an objective lens. CONSTITUTION: On the outer circumference of the objective lens, a plurality of ribs for receiving the air flow caused by the revolution of the disk are dotted on the side facing a disk to quid the air flow to the surface of the objective lens. In addition, the part where the ribs are not provided on the outer circumference of the objective lens is formed into a shape to be continuously inclined to the grade of the convex lens of the objective lens. Thus the air flow is made easy to collide with the ribs and also dusts are made easy to fall.
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