| 摘要 |
An optical deflection device is used to deflect a light beam, such as a laser beam, and comprises a base member, a movable member having an optical deflection element, and a set of spring elements provided at respective sides of the movable member such that the movable member is resiliently supported by the spring elements with respect to the base member. An electromagnetic driver rotationally drives the movable member with respect to the base member, and includes first and second sets of permanent magnets provided on the base member to produce first and second magnetic fields. The fields are reversed with respect to each other. The driver further includes first and second electromagnetic coils provided on the movable member and disposed in the fields. The respective first and second coils are electrically energized in the first and second fields in such a manner that electric currents flow through the first and second coils in opposite directions, whereby the respective first and second coils are subjected to rotational forces in the same rotational direction.
|
