发明名称 |
REAR PROJECTION SCREEN USING BIREFRINGENT OPTICAL FILM FOR ASYMMETRIC LIGHT SCATTERING |
摘要 |
A dispersing element for a rear projection screen assembly is sensitive to t he polarization of the light passing through the element. In particular, the element disperses light having a first polarization differently from light having a second polarization orthogonal to the first polarization. The dispersing element may be aligned with a polarization axis neither parallel nor perpendicular to the polarization of the light passing through the element. The dispersing element may also be employed with a polarizer to remove unwanted light that propagates through the dispersing element. The dispersing element may also be rotatably mounted relative to a polarized lig ht source so as to vary the angle between the polarization axis of the element and the polarization direction of the light.
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申请公布号 |
CA2382775(A1) |
申请公布日期 |
2001.03.15 |
申请号 |
CA20002382775 |
申请日期 |
2000.01.13 |
申请人 |
3M INNOVATIVE PROPERTIES COMPANY |
发明人 |
MOSHREFZADEH, ROBERT S.;MERRILL, WILLIAM W.;WEBER, MICHAEL F.;ALLEN, RICHARD C.;CHANG, JEFFREY C. |
分类号 |
G02B5/02;G02B5/30;G02F1/13;G02F1/1335;G02F1/13357;G03B21/10;G03B21/62;H04N5/74;(IPC1-7):G03B21/62 |
主分类号 |
G02B5/02 |
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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