High-pressure sodium vapor discharge lamp

Details High-pressure sodium vapor discharge lamp High-pressure sodium vapor discharge lamp

1979-07-09

1981-04-07

Demeo, Palmer C.

Electric lamp and discharge devices

With magnetic device

Field transverse to discharge

313201, 313225, 313229, H01J 6116, H01J 6120, H01J 6122

Patent

active

042609291

ABSTRACT:
The invention relates to a high-pressure sodium vapor discharge lamp provided with a discharge tube containing mercury and xenon as well as sodium. The sodium vapor pressure--in the operating condition of the lamp--is within a given range.
In accordance with the invention a xenon filling pressure is used which is between 50 and 1000 torr. As a result a lamp can be obtained which has a high luminous efficacy in the operating condition.

REFERENCES:
patent: 3248590 (1966-04-01), Schmidt
patent: 3384798 (1968-05-01), Schmidt
patent: 4037129 (1977-07-01), Zack et al.
"The High Pressure Lamp", by J. J. deGroot et al., Philips Tech. Review, vol. 35, No. 11-12, pp. 334-342, 1975.

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