OPTICAL DISK PLAYER WITH FOCUS PULL-IN FUNCTION

摘要

An optical disc player executes a focus pull-in before the objective lens (23) comes into contact with an optical disc (4). When the objective lens (23) reaches the capture range of the focusing servo loop by a moving operation toward the disk (4) and a distance between the objective lens (23) and the disc surface is at the minimum distance or is changing in a widening direction, the moving operation of the objective lens is stopped. The moving operation may be stepwise per revolution or particularly slow near the disk surface.