PURPOSE: To improve the stability of servo performance specifying the performance for making a light beam spot converged by an objective lens follow up the face wobbling and the eccentricity of an information recording medium.
CONSTITUTION: A vibration absorber 12a composed of gelatinous silicon rubber, acrylate resin, etc., and interposed between a supporting members 6a, 6c and a crimping piece 11a one end of which is fixed on a base plate 7 in parallel with the supporting members and a vibration absorber 12b interposed between supporting members 6b, 6d and a crimping piece 11b are arranged. When a movable part 13 is driven in the focusing and tracking directions and whole actuator for an objective lens is made to move in the tracking direction, the resonance occurred due to the twist of supporting members 6a, 6b absorbs the vibration energy of the torsional resonance and suppresses the vibration by the vibration absorbers 12a, 12b arranged between the crimping pieces 11a, 11b and the supporting members 6a, 6b.
URAIRI KENICHIROU
FUJIKAWA KAZUHIKO
