公开(公告)号：US20020075785A1

公开(公告)日：2002-06-20

申请号：US10012475

申请日：2001-12-12

Applicant: Samsung Electronics Co., Ltd.

Inventor： Chul-woo Lee ,  Ki-won Lee ,  Seung-tae Jung ,  Dae-sik Kim

IPC: G11B007/135

CPC classification number: G11B7/1362 ,  G11B7/1374 ,  G11B2007/13725

Abstract: A solid immersion mirror (SIM) type objective lens and an optical pickup employing the same. The objective lens has a first curved surface which condenses incident light and a second curved surface surrounding the first curved surface which diverges incident light. A second transmission surface disposed to face the first transmission surface has an area which transmits incident light and a first reflection surface surrounding the second transmission surface which reflects incident light. A second reflection surface which surrounds the second curved reflects incident light. The objective lens realizes an NA of 0.7 or more with a single lens; has a working distance enabling far field recording/reproducing; has a smaller blocking area than that of the conventional SIM; and generates a smaller amount of side lobe. Where the objective lens is adopted in an optical pickup device, generation of jitter during reproduction or cross erasure during recording is minimized.

Abstract translation: 固体浸没镜（SIM）型物镜和采用该物镜的光拾取器。 物镜具有第一弯曲表面，其冷凝入射光和围绕第一弯曲表面的第二弯曲表面，其分散入射光。 与第一透射面对置设置的第二透射面具有透射入射光的区域和围绕反射入射光的第二透射面的第一反射面。 围绕第二弯曲部的第二反射面反射入射光。 物镜用单个透镜实现0.7以上的NA; 具有实现远场记录/再现的工作距离; 具有比常规SIM更小的阻塞面积; 并产生较小量的旁瓣。 在光学拾取装置中采用物镜的情况下，在记录期间的再现或交叉擦除期间产生抖动被最小化。