optical disc device

Abstract

Abstract PURPOSE:To obtain an optical disc device possible for high speed accessing by decreasing remarkably a mass added to a radial direction moving means in the total mass of a focus lens moving means. CONSTITUTION:A focus lens 34 is fixed to a moving piece 35 of the focus lens moving means and conducts focusing vertically by a relative force with a stator 36 of the focus lens moving means fixed to a chassis 33. The moving mass of the radial movement is decreased remarkably by fitting respectively a magnetic circuit and the 2nd optical system having a large mass of the focus lens moving means to the chassis 33 and the tracking and the track accessing are realized by one actuator (radial moving means) by allowing the mechanical resonance frequency harmful to the tracking servo to be increased easily to a frequency without a problem and the high speed access servo is attained.

Inventors

• 👤 Takeshi Shimamoto
• 👤 嶋本　健
• 👤 Masaharu Imura
• 👤 正春 井村

Bibliographic Details