Mirror for optical recording system

摘要

A movable mirror device for an optical information recording and reproducing system has a base portion with a bottom section and an up-standing section extending from the bottom section. A permanent magnet having opposite magnetic poles at opposite ends thereof is fixedly mounted on the bottom section of the base portion. A pair of yokes have their ends engaged with opposite ends of the magnet, respectively. A plate member is supported by the up-standing section of the base portion disposed between the other ends of said yokes and a movable portion having a core. A mirror substrate is supported by an end plate formed on one end of the core and a mirror is fixed to the mirror substrate. A supporting portion provided on the other end of said core pivotally supports the core with respect to the up-standing section and a coil portion is wound around the mirror substrate. The movable portion is disposed such that the coil portion of the movable portion is disposed in a magnetic field formed in gaps between the plate member and the other ends of the yokes.