-
61.
公开(公告)号:US06529454B1
公开(公告)日:2003-03-04
申请号:US09508169
申请日:2000-03-08
申请人: Yoshito Asoma , Kiyoshi Toyota , Noriaki Nishi
发明人: Yoshito Asoma , Kiyoshi Toyota , Noriaki Nishi
IPC分类号: G11B700
CPC分类号: G11B7/1356 , G11B7/00 , G11B7/123 , G11B7/131 , G11B7/1378
摘要: A cylindrical lens 39 for generating focussing error signals is formed as one with a portion of an optical component 33 of a transparent material lying on an optical path L2 that is an optical path of a return light beam from the optical member 33. This configuration assures a small size while reducing the production cost and improving operational reliability.
摘要翻译: 用于产生聚焦误差信号的柱面透镜39形成为具有位于作为来自光学构件33的返回光束的光路的光路L2上的透明材料的光学部件33的一部分的柱面透镜39.这种构造确保 体积小,同时降低生产成本,提高运行可靠性。
-
公开(公告)号:US5982731A
公开(公告)日:1999-11-09
申请号:US27650
申请日:1998-02-24
IPC分类号: G11B7/09 , G11B7/12 , G11B7/135 , G11B11/105 , G11B7/00
CPC分类号: G11B7/1356 , G11B11/10543 , G11B7/123 , G11B7/0901 , G11B7/0912
摘要: An optical pickup includes a polarization component separation element which is formed as a unit or single piece of birefringence material. The separation element is not laminated obviating the need to carefully match the optical axes of the laminated pieces. Multiple reflections within the birefringent crystal which comprises the separation element improves the separation and resolution of the polarized components which are extracted from a laser beam reflected back off the media surface.
摘要翻译: 光学拾取器包括形成为单体或单片双折射材料的偏振分量分离元件。 分离元件不层叠,从而不需要仔细地匹配层压件的光轴。 包含分离元件的双折射晶体内的多次反射改善了从从介质表面反射回来的激光束提取的偏振分量的分离和分辨率。
-