| 发明名称 |
Fresnel lens spotlight with coupled variation of the spacing of lighting elements |
| 摘要 |
A Fresnel lens spotlight whose emitted light beam has a variable aperture angle, having a reflector, a lamp and at least one Fresnel lens is provided. The at least one Fresnel lens has a negative focal length and a virtual focal point.
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| 申请公布号 |
US2005168995(A1) |
申请公布日期 |
2005.08.04 |
| 申请号 |
US20040019409 |
申请日期 |
2004.12.22 |
| 申请人 |
SCHOTT AG |
发明人 |
KITTELMANN RUDIGER;WAGENER HARRY |
| 分类号 |
F21L4/00;F21S2/00;F21S8/00;F21S8/10;F21V3/04;F21V5/00;F21V5/04;F21V7/00;F21V7/22;F21V9/08;F21V14/00;F21V14/02;F21V14/06;F21Y101/00;G02B3/08;(IPC1-7):F21V5/04 |
主分类号 |
F21L4/00 |
| 代理机构 |
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