| 摘要 |
PROBLEM TO BE SOLVED: To provide an information recording/reproducing device wherein light quantity adjustment is unnecessary for each head. SOLUTION: The information recording/reproducing device equipped with at least two heads for projecting lights emitted from a light source to an information recording medium is provided with an optical switch for switching the optical paths of the lights emitted from the light source to selectively emit a light to one of the two heads. Optical path lengths from the light source to the two heads are equal. COPYRIGHT: (C)2008,JPO&INPIT
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