发明名称 |
Reflection type compound prism and optical pickup apparatus employing the same |
摘要 |
A reflection type compound prism and an optical pickup apparatus employing the same. As a light beam is passed through the compound prism, a size of the light beam in a direction perpendicular to a reference plane is reduced by a first reflection surface, propagated toward an objective lens by second and third reflection surfaces and the size restored by reflecting the light beam from a fourth reflection surface forming an angle less than 45° with respect to the reference plane so that a height of an optical system is reducible to obtain a small thin optical pickup with a desired NA. The second and third reflection surfaces are spaced apart in a direction perpendicular to the reference plane by an amount close to a diameter of the light beam at a point of incidence of the light beam with the compound prism.
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申请公布号 |
US2002172133(A1) |
申请公布日期 |
2002.11.21 |
申请号 |
US20020078459 |
申请日期 |
2002.02.21 |
申请人 |
SAMSUNG ELECTRONICS CO., LTD. |
发明人 |
KIM DAE-SIK;JUNG SEUNG-TAE;YEON CHEOL-SUNG;CHO KUN-HO |
分类号 |
G02B5/04;G11B7/12;G11B7/135;(IPC1-7):G11B7/135 |
主分类号 |
G02B5/04 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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