发明名称 |
Optical Data Storage System with an Inorganic, Dielectric Grid Polarizer |
摘要 |
An optical data storage system includes a laser diode to produce at least one light beam. An inorganic, dielectric grid polarizing beam splitter is disposable in the light beam to transmit a polarized light beam, and includes a stack of film layers disposed over a substrate. Each film layer is formed of a material that is both inorganic and dielectric. Adjacent film layers have different refractive indices. At least one of the film layers is discontinuous to form a form birefringent layer with an array of parallel ribs with a pitch of less than 390 nm. A drive carries a disc medium disposed in the polarized light beam to reflect a modified light beam. The grid polarizer is disposable in the modified light beam to separate the modified light beam into a reflected beam and a transmitted beam. A photo-detector is disposable in the reflected or transmitted beam.
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申请公布号 |
US2008055720(A1) |
申请公布日期 |
2008.03.06 |
申请号 |
US20060469241 |
申请日期 |
2006.08.31 |
申请人 |
PERKINS RAYMOND T;WANG BIN;GARDNER ERIC;HANSEN DOUGLAS P |
发明人 |
PERKINS RAYMOND T.;WANG BIN;GARDNER ERIC;HANSEN DOUGLAS P. |
分类号 |
G02B5/30 |
主分类号 |
G02B5/30 |
代理机构 |
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地址 |
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