发明名称 |
PRECISION APPROACH PATH INDICATOR |
摘要 |
A Precision Approach Path Indicator (PAPI) unit comprises first and second light sources and a projection lens assembly. Light emitted by the first and second light sources is collected by first and second solid waveguides respectively and is guided by said waveguides to an intermediate plane. The intermediate plane is located in the focal plane of the projection lens assembly. |
申请公布号 |
US2012223255(A1) |
申请公布日期 |
2012.09.06 |
申请号 |
US201213408688 |
申请日期 |
2012.02.29 |
申请人 |
WALKER DUNCAN JOHN WILLIAM;AERONAUTICAL & GENERAL INSTRUMENTS LIMITED |
发明人 |
WALKER DUNCAN JOHN WILLIAM |
分类号 |
B64F1/18 |
主分类号 |
B64F1/18 |
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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