发明名称 |
Light beacon |
摘要 |
A system for producing a beam of light with a small vertical angular spread and a wide horizontal angular spread comprises an annular prism 1 adjacent to a ring of light emitting diodes 2. Light from the LEDs is collimated by a lower toric surface 3, totally reflected by an inverted-conical inner surface 4 and then refracted through a conical outer surface 5. The LEDs may produce white or coloured light and are conventionally mounted on a printed circuit board. The prism and diodes may form only a partial ring so that the light beam is restricted in horizontal angular spread. The toric refracting surface may be replaced by a ring of abutting axially-symmetric refracting surfaces (11,fig.4) each having an LED at its axis. A stackable and sealable assembly may be formed with one prism unit being placed on another (fig.5). |
申请公布号 |
GB2350176(B) |
申请公布日期 |
2002.10.09 |
申请号 |
GB19990011559 |
申请日期 |
1999.05.18 |
申请人 |
JOHN CLAYTON * RUDDICK;JOHN CLAYTON * RUDDICK;JOHN CLAYTON * RUDDICK;* PINPOINT LIGHTING LIMITED |
发明人 |
JOHN CLAYTON * RUDDICK;JOHN CLAYTON * RUDDICK;JOHN CLAYTON * RUDDICK |
分类号 |
B63B45/04;F21S8/00;F21V5/02;F21V5/04;F21V7/00 |
主分类号 |
B63B45/04 |
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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