公开(公告)号：US08264923B2

公开(公告)日：2012-09-11

申请号：US12783063

申请日：2010-05-19

申请人： Mai Narita

发明人： Mai Narita

IPC分类号： G11B7/00

CPC分类号： G11B7/13927 ,  G11B7/0901 ,  G11B7/0903 ,  G11B7/0941 ,  G11B7/0946

摘要： An optical disc device including: a light source; an object lens to focus light emitted from the light source on an information recording surface of an optical disc; a movable lens that is arranged on an optical path between the light source and the objective lens and arranged such that position thereof is adjustable along a direction of a light axis; a lens moving portion to move the movable lens along the direction of the light axis; a tracking servo system which makes a beam spot that is formed of the light from the light source through focusing by the objective lens keep on track of the optical disc; and a control part which controls gain of a servo loop of the tracking servo system is made temporarily larger when the movable lens is moved by the lens moving portion in comparison with a case where moving of the movable lens by the lens moving portion is not performed.

摘要翻译： 一种光盘装置，包括：光源; 将从光源发射的光聚焦在光盘的信息记录表面上的物镜; 可移动透镜，其布置在光源和物镜之间的光路上并且布置成使得其位置沿着光轴的方向可调节; 透镜移动部分，用于沿着所述光轴的方向移动所述可移动透镜; 跟踪伺服系统，其使得由来自光源的光通过物镜聚焦形成的束斑保持在光盘的轨迹上; 与通过透镜移动部移动可移动透镜的情况相比，当透镜移动部移动可移动透镜时，控制跟踪伺服系统的伺服环路的增益的控制部分暂时变大 。