| 发明名称 |
HIGH-PRESSURE SODIUM DISCHARGE LAMP |
| 摘要 |
The invention relates to a high-pressure sodium lamp provided with an elongate discharge vessel in which the pressure P in the operative condition of the lamp is at least 170x103 Pa. The lamp is suitable to be operated with a power of periodically alternating value, which power comprises at least one component having a frequency nu i which satisfies i-0.45</=2.35 nu i Le/e</=i+0.45 where i is an integral positive number, c is the speed of sound in the gaseous part of the filling and Le is the effective length of the discharge vessel. According to the invention, the relation is satisfied: M nu ixfixPxd </=185, in which M nu i is the modulation depth of the power component having a frequency nu i, fi is a geometric lamp factor and d the average inner diameter of the discharge vessel. In this manner, the operation of the lamp is free of arc instabilities due to longitudinal acoustic resonances. |
| 申请公布号 |
DE3377842(D1) |
申请公布日期 |
1988.09.29 |
| 申请号 |
DE19833377842 |
申请日期 |
1983.05.06 |
| 申请人 |
N.V. PHILIPS' GLOEILAMPENFABRIEKEN |
发明人 |
VAN DER HEIJDEN, RUDOLF LAMBERTUS ADRIANUS;DORLEIJN, JAN WILLEM FREDERIK |
| 分类号 |
H01J61/54;H01J61/82;H01J61/88;(IPC1-7):H01J61/88 |
主分类号 |
H01J61/54 |
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