| 摘要 |
The movable holder of the objective lens driving unit is provided with an opening hole. An objective lens retaining portion for retaining an objective lens is disposed at the upper portion of the opening hole, while a liquid crystal element retaining portion for retaining a liquid crystal element is disposed at the lower portion of the opening hole. The movable holder is further provided with a bore that extends from the side face of the movable holder in the direction substantially perpendicular to the optical axis of the objective lens and reaches a side face 6 b of the liquid crystal element retained by the liquid crystal element retaining portion so that adhesive can be injected from the bore.
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