SRE39025 *13 Oct 200021 Mar 2006Samsung Electronics Co., Ltd.Lens device including a light controlling mechanism and an optical pickup apparatus using a lens deviceUSRE403295 Jul 200220 May 2008Konica CorporationSingle objective lens for use with CD or DVD optical disksUSRE431064 Sep 200717 Jan 2012Samsung Electronics Co., Ltd.Optical pickup compatible with a digital versatile disk and a recordabl