Very high efficacy electrodeless high intensity discharge lamps

Patent · Tue Nov 10 00:00:00 EST 1987

OSTI ID:5851383

Johnson, P D

This patent describes an electrodeless arc lamp for forming a ring shaped plasma in a region therein during operation comprising a tube having a raised bottom center section, and an optically transparent outer jacket hermetically sealing the tube to protect the tube from cooling by convection. The raised center section rises centrally to form a ring shaped reservoir below the region in which the rig shaped plasma is formed to minimize wall cooling during operation of the lamp so that there is enhanced excitation near the center of the tube.

• Assignee: Dept. of Energy, Washington, DC
• Patent Number(s): US 4705987
• OSTI ID: 5851383
• Resource Relation: Patent File Date: Filed date 3 Oct 1985
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
LIGHT BULBS
DESIGN
COOLING
EFFICIENCY
OPERATION
PLASMA
SEALS
SLEEVES
TUBES
320106* - Energy Conservation
Consumption
& Utilization- Building Equipment- (1987-)