| 摘要 |
PURPOSE:To remove or decrease an interference phenomenon, and to stably read or write an optical head device even when the inclination of a medium and a light edge right-angle fine secular charge exist by providing a light flux processing part at the front surface of a mount to hold a light source. CONSTITUTION:In addition to the conventional construction, onto a front surface 300 of a mount 4, a reflecting preventing layer 400 is newly added as the light flux processing part, and thereby, the light reflected from an LD side to a point C again comes to be the light only to pass through an AGBGAGC channel essentially. Thus, by making low the reflecting ratio of the mount surface, the light to make incident on the primary light on the disk again can come to be only one, and the interference effect conventionally caused by the phase shift due to the inclination of the disk and the inclination of the edge surface of the LD side between plural reincident light beams can be prevented. Consequently, by the differentiation of the light detecting device element, when the track dislocation is detected, the floating from the zero level of the conjunction track point can be eliminated. |
