| 发明名称 |
Eccentric Fresnel lens sheet and method of making same |
| 摘要 |
An eccentric Fresnel lens is formed from a concentric Fresnel lens sheet or Fresnel lens sheet mold. The concentric Fresnel lens sheet or mold is cut to produce an eccentric Fresnel lens having a center offset from the optical axis of the concentric Fresnel lens.
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| 申请公布号 |
US5390050(A) |
申请公布日期 |
1995.02.14 |
| 申请号 |
US19930086359 |
申请日期 |
1993.07.06 |
| 申请人 |
CANON KABUSHIKI KAISHA |
发明人 |
YANAGI, HARUYUKI;MINOURA, NOBUO;KUREMATSU, KATSUMI;MITSUTAKE, HIDEAKI |
| 分类号 |
B29D11/00;G02B3/08;(IPC1-7):G02B3/08 |
主分类号 |
B29D11/00 |
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