| 摘要 |
There is disclosed a high precision positioning apparatus capable of realizing accurate positioning of a recording medium with respect to an optical system by minute movement at a relatively low cost. The high precision positioning apparatus comprises a driving unit (1) for minutely moving a flat-plate shaped recording medium (10), which records/ reproduces information using light, with respect to an optical system in an in-plane direction of the recording medium (10). The driving unit (1) comprises a frame-shaped unit body (2), a first drive frame (3) accommodated inside the unit body (2), and a second drive frame (4) accommodated inside the first drive frame (3) and fixed in the vicinity of a recording portion (11) of the recording medium (10). The first drive frame (3) freely moves with respect to the unit body (2) by means of micro-driving elements (5) in an in-plane direction of the recording medium (10), and the second drive frame (4) freely moves with respect to the first drive frame (3) by means of micro-driving elements (5) in an in-plane direction of the recording medium (10), in a direction substantially perpendicular to the direction in which the first drive frame (3) moves. Therefore, the recording medium (10) is minutely moved in an in-plane direction thereof.
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