| 发明名称 |
Fresnel lens for projection screens |
| 摘要 |
The present invention is a screen, such as is used in back-lit projection screens, having a Fresnel lens laminated to another layer for support. The screen includes a Fresnel lens having an output surface, and a dispersing screen supportingly attached on a first side to the output surface of the Fresnel lens.
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| 申请公布号 |
US2002154401(A1) |
申请公布日期 |
2002.10.24 |
| 申请号 |
US20020163819 |
申请日期 |
2002.06.05 |
| 申请人 |
3M INNOVATIVE PROPERTIES COMPANY |
发明人 |
HENNEN DANIEL W.;MOSHREFZADEH ROBERT S.;NELSON JOHN C.;TAPIO SCOTT M.;THOMAS PATRICK A. |
| 分类号 |
G02B3/08;G02B5/00;G02B5/02;G02B5/32;G03B21/62;(IPC1-7):G03B21/60 |
主分类号 |
G02B3/08 |
| 代理机构 |
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