Objective Lens Actuator and a Disc Apparatus Using the Same Therein

• Main Authors: OCHI MANABU, ITOU TETSUO, YAMADA SOUICHIROU, KIMURA KATSUHIKO
• Format: Patent
• Language: English
• Published: 07.05.2009
• Subjects: INFORMATION STORAGE; INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER; OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICS; PHYSICS

An objective lens actuator, having a small tilt of an objective lens, for driving the objective lens in a focusing direction and a tracking direction, so as to focus lights on a recording surface of an optical disc, as a recording medium of information, comprises therein: a magnet; a lens holder, which is configured to hold the lens thereon; and four (4) pieces of tracking coils are disposed in a line on a side surface of the lens holder for holding the objective lens thereon, facing to the magnet. And also, an objective lens actuator, having a small tilt of an objective lens, for driving an objective lens in a focusing direction and a tracking direction, so as to focus lights on a recording surface of an optical disc, as a recording medium of information, comprises therein: magnets, which are disposed on two (2) surfaces putting the objective lens therebetween; a lens holder, which is configured to hold the lens thereon; and four (4) pieces of tracking coils are disposed in a line on each of two (2) side surfaces of the lens holder for holding the objective lens thereon, facing to the magnets.