Objective lens moving actuator

• Main Authors: TAKAMICHI TOMIYAMA, TAKATOSHI HIRATA
• Format: Patent
• Language: English
• Published: 09.07.1999
• Edition: 6
• Subjects: INFORMATION STORAGE; INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER; PHYSICS

An objective lens moving actuator comprises a movable member (3; 63) for supporting an objective lens (2; 62), resilient supporting member (5; 51) for resiliently supporting the movable member (3; 63) together with the objective lens (2; 62) such that the movable member (3; 63) having the objective lens (2; 62) can be moved in a first direction parallel to the optical axis of the objective lens (2; 62) and in a second direction perpendicular to the optical axis of the objective lens (2; 62), a fixing member (10; 67) to which the base end of the resilient supporting member (5; 51) is fixed, an electromagnetic drive device (12a, 12b, 14; 64, 65, 66) for moving the resilient supporting member (5; 51) in the first and second directions together with the objective lens (2; 62), and an adjusting member for rotating the resilient supporting member (5) such that the optical axis of the objective lens (2) has a predetermined skew angle. Also, an objective lens moving actuator comprises a movable member (3; 63) for supporting an objective lens (2; 62), a resilient supporting member (5; 51) for resiliently supporting the movable member (3; 63) together with the objective lens (2; 62) such that the movable member (3; 63) having the objective lens (2; 62) can be moved in the first direction parallel to an optical axis of the objective lens (2; 62) and the second direction perpendicular to the optical axis of the objective lens (2; 62), a fixing member (10) having a first plane portion and a second plane portion (16) formed vertically with respect to the first plane portion. A base end of the resilient supporting member (5) being fixed to the second plane portion (16), and an electromagnetic drive device (12a, 12b, 14; 64, 65, 66) for moving the resilient supporting member (5; 51) in the first and second directions together with the objective lens (2; 62), wherein the resilient supporting member (5) is rotatably attached to the second plane portion (16) so that the optical axis of the objective lens (2) has a predetermined skew angle.