Optical disc apparatus switching focus point between layers

Optical disc apparatus switching focus point between layers

Optical disc apparatus using 4 separate detection elements with

Optical disc apparatus with access system having object lens con

Optical disc apparatus with accessing using only reference veloc

Optical disc apparatus with adjustable constraint length PRML

Optical disc apparatus with different frequencies of wobble...

Optical disc apparatus with disc selecting function

Optical disc apparatus with laser power control matching...

Optical disc apparatus with lens position detection and control

Optical disc apparatus with rapid and stable accessing capabilit

Optical disc apparatus with rapid and stable accessing capabilit

Optical disc apparatus with reduced leakage of wobble signal to

Optical disc apparatus with regulation of recording velocity...

Optical disc apparatus with rule based synchronization

Optical disc apparatus with selection of three-beam and push-pul

Optical disc apparatus with selective track accessing using a co

Optical disc apparatus with selectively shiftable seek operation

Optical disc apparatus with sensing circuitry to judge a movemen

Optical disc apparatus with tracking error compensation