发明名称 |
REFLEKTIERENDES LCD PROJEKTIONSSYSTEM MIT WEITWINKEL POLARISATIONSSTRAHLENTEILER |
摘要 |
<p>An optical imaging system including a wide-angle Cartesian polarizing beam splitter, light valve illumination optics having an f/#<=2.5, and at least one reflective light valve. The Cartesian polarizing beam splitter (PBS) has a structural orientation defining fixed polarization axes. The use of a Cartesian PBS allows the development of systems using curved PBS that provide higher light output and/or replace or augment other optical components. By recognizing and advantageously applying properties of wide-angle Cartesian polarizers, the present invention discloses a high-efficiency optical imaging system capable of functioning at f#'s equal to or below f/2.5 while maintaining a contrast ratio of at least 100 to 1, or, more preferably, 150 to 1 in a projection system configuration.</p> |
申请公布号 |
DE60007117(T2) |
申请公布日期 |
2004.06.03 |
申请号 |
DE2000607117T |
申请日期 |
2000.05.16 |
申请人 |
3M INNOVATIVE PROPERTIES CO., ST. PAUL |
发明人 |
BRUZZONE, L.;AASTUEN, J.;STRHARSKY, J.;ECKHARDT, K.;WEBER, F.;BOYD, T. |
分类号 |
B29C55/02;B29D11/00;B32B7/02;B32B27/36;G02B5/30;G02B27/14;G02B27/18;G02B27/28;G02F1/1335;G02F1/13357;G03B21/00;G03B33/12;H04N9/31;H04N17/00;(IPC1-7):G02B27/28 |
主分类号 |
B29C55/02 |
代理机构 |
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地址 |
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