| 摘要 |
PROBLEM TO BE SOLVED: To provide an optical information recording and reproducing device that can prevent the spot diameter from becoming large and is capable of miniaturizing. SOLUTION: The optical information recording and reproducing device of this invention has a micromirror array 4 consisting of mirrors disposed in the route of a laser beam emitted from a laser beam source 1 to change its direction. This optical information recording and reproducing device adjusts the angle of the laser beam to the field lens to correct the spherical aberration when recording and reproducing the signals on an optical disk having one or more surfaces by using the above micromirror array. |
