发明名称 |
ELECTRIC LAMP HAVING OPTICAL INTERFACE FILTER |
摘要 |
Thin film interference filter consists of alternating first and second layers, the first layers being silica, the second layers being a mixture of tantala and niobia. The filter may be used on a high temperature lamp in an inert atmosphere if the niobia in the mixture is less than 40 % by weight. For higher percentages a partial pressure of oxygen has been found to prevent blackening of the layers.
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申请公布号 |
WO9953526(A1) |
申请公布日期 |
1999.10.21 |
申请号 |
WO1999IB00444 |
申请日期 |
1999.03.16 |
申请人 |
KONINKLIJKE PHILIPS ELECTRONICS N.V.;PHILIPS AB |
发明人 |
GIBSON, RAY, G.;COTTAAR, EDUARDUS, J.;DOETTER, WOLFGANG |
分类号 |
G02B5/28;H01J61/40;H01K1/32;(IPC1-7):H01K1/26 |
主分类号 |
G02B5/28 |
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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