Patent ID: 6563781
Filing Date: 2003-05-13
Classification: G11B

Abstract:
An optical information storage device for at least performing information reproducing by irradiating a light on a surface of a recording medium, the recording medium having a track irradiated with the light to at least reproduce information, comprising:a medium holding section for holding the recording medium in a predetermined position; and an optical head for irradiating the light on the surface of the recording medium held by said medium holding section, wherein said optical head includes, a light source for emitting a light, a light shielding body provided with a slit, a light shielding body holding section for holding the light shielding body in a position close to/in contact with the surface of the recording medium such that the slit of the light shielding body intersects the track by an angle of 45Â° or lower, condensing means for condensing the light emitted from the light source on the slit of the light shielding body, and moving means for moving the light condensed on the slit by the condensing means along the slit.