MODIFIED INTERNAL COUPLING ELECTRODELESS FLUORESCENT LAMP

摘要

A modified internal coupling electrodeless fluorescent lamp includes a glass bulb (21) and a power coupler (22). An amalgam is positioned on the cold side of the glass bulb. The glass bulb includes a shell (211) and an inner container (212). An annular airtight exothermal cavity (25) is encircled by the shell and the inner container. An inert gas is filled into the exothermal cavity, and a coupling cavity (26) is positioned in the inner part of the inner container. The power coupler includes a cooling bar (223), a magnetic core (221) and windings (222), which are arranged from the inside to the outside, and the power coupler is positioned in the coupling cavity. At least one diffuse reflection layer (28) made of a material whose wide spectrum is 250-2000 nm and whose high diffuse reflection rate is greater than 30% can be positioned between the inwall of the inner container and the outer surface of the power coupler. The material of the diffuse reflection layer can be non-conducting material which can resist the high temperature above 100?. The visible light and the infrared ray can be reflected back into the annular airtight exothermal cavity by the diffuse layer. Finally, the visible light and infrared ray can be transmitted out of the outer surface of the glass bulb. The visible light that can not be used in original can be used now, and the luminous efficiency can be improved. The temperature can be reduced and the life of the lamp can be prolonged.