公开(公告)号：US5933401A

公开(公告)日：1999-08-03

申请号：US869754

申请日：1997-06-05

Applicant: Chul-woo Lee ,  Dong-ho Shin ,  Chong-sam Chung ,  Pyeong-yong Seong ,  Kun-ho Cho ,  Hyun-seob Choi ,  Yong-hoon Lee ,  Tae-kyoung Kim ,  No-kyong Park

Inventor： Chul-woo Lee ,  Dong-ho Shin ,  Chong-sam Chung ,  Pyeong-yong Seong ,  Kun-ho Cho ,  Hyun-seob Choi ,  Yong-hoon Lee ,  Tae-kyoung Kim ,  No-kyong Park

IPC: G11B7/00 ,  G11B7/12 ,  G11B7/125 ,  G11B7/135

CPC classification number: G11B7/1356 ,  G11B7/123 ,  G11B7/127 ,  G11B7/1395 ,  G11B2007/0006

Abstract: An optical pickup capable of compatibly adopting disks of different formats which are placed in an optical player includes a first optical source for emitting light having a predetermined wavelength, a second optical source for emitting light having a wavelength different from that of light emitted from the first optical source, an objective lens for focusing light emitted from the respective first and second optical sources on a recording medium placed in the optical player, a light path changing unit disposed on a light path between the first and second optical sources and the objective lens for changing the traveling path of incident light, a first optical detector for receiving light emitted from the first optical source and is incident via the recording medium and the light path changing unit, and a second optical detector for receiving light emitted from the second optical source and is incident via the recording medium and the light path changing unit.

Abstract translation: 能够兼容地采用放置在光学播放器中的不同格式的光盘的光学拾取器包括：用于发射具有预定波长的光的第一光源;用于发射波长与第一光发射光的波长不同的光的第二光源; 光源，用于将从相应的第一和第二光源发射的光聚焦在放置在光学播放器中的记录介质上的物镜;设置在第一和第二光源与物镜之间的光路上的光路改变单元， 改变入射光的行进路径，第一光学检测器，用于接收从第一光源发射的光，并经由记录介质和光路改变单元入射;以及第二光学检测器，用于接收从第二光源发射的光;以及 经由记录介质和光路改变单元入射。

公开(公告)号：US5796700A

公开(公告)日：1998-08-18

申请号：US873740

申请日：1997-06-12

Applicant: Chul-woo Lee ,  Pyeong-yong Seong ,  Dong-ho Shin

Inventor： Chul-woo Lee ,  Pyeong-yong Seong ,  Dong-ho Shin

IPC: G11B7/125 ,  G11B7/135 ,  G11B7/00

CPC classification number: G11B7/1365 ,  G11B7/1359 ,  G11B7/1378 ,  G11B7/1398

Abstract: An optical pickup having a beam shaping device for changing an oval-shaped light beam emitted from a light source into a circular light beam, and an astigmatic difference correcting device for correcting the astigmatic difference of the light is provided. The beam shaping device is a cylindrical lens arranged between the light source and a beam splitter, having a convex cross-section, for converging the incident light, e.g., with respect to an X-axial direction. The astigmatic difference correcting device is an astigmatism lens arranged along an optical path between the cylindrical lens and a light path changing device, as a concave lens, for linearly passing light of a certain direction and diverging light of other directions.

Abstract translation: 一种具有用于将从光源发射的椭圆形光束改变成圆形光束的光束整形装置的光学拾取器，以及用于校正光的散光差异的像差差校正装置。 光束整形装置是布置在光源和分束器之间的柱面透镜，其具有用于使入射光例如相对于X轴方向会聚的凸形横截面。 散光差分校正装置是沿着柱面透镜和光路改变装置之间的光路布置的散光透镜，作为凹透镜，用于线性地通过某一方向的光并且发散其它方向的光。