| 摘要 |
A detection means (52) detects optimum driving voltages of a mirror device. A correction means (53) corrects driving voltage values in a table (54b) based on the optimum driving voltages. This makes it possible to drive the mirror to an optimum pivot angle even when the optimum pivot angle of the mirror changes due to, e.g., mirror drift or a change in the environment such as temperature.
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