| 摘要 |
PROBLEM TO BE SOLVED: To provide an optical disk original plate exposing device capable of performing stable exposure processing for a long time by reducing a detection error of focus light caused by base deformation resulting from temperature change. SOLUTION: In this optical disk original plate exposing device, an optical component for focus control is arranged on one base member attached to an optical head attached with an objective lens that focuses laser beams for recording to perform exposure and recording on the original plate. In addition, in the optical disk original plate exposing device, the shape of the base member is formed to be almost left-right symmetrical centering on the optical axis of the objective lens. COPYRIGHT: (C)2004,JPO&NCIPI
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