Patent
Adjustable length center conductor for termination fixtures for electrodeless lamps
TLDR
In this paper, a light source includes a source of high frequency power, an electrodelsss lamp and a termination fixture for coupling power to the lamp, the fixture having an outer conductor and an inner conductor whose length is adjustable for providing dynamic matching of the impedance of the lamp during the operating mode to the output impedance.Abstract:
A light source includes a source of high frequency power, an electrodelsss lamp and a termination fixture for coupling power to the lamp, the fixture having an outer conductor and an inner conductor whose length is adjustable for providing dynamic matching of the impedance of the lamp during the operating mode to the output impedance of the source. Variations in the power level from the source, such as is desirable in providing lamp brightness selectivity, vary both the real and imaginary components of the lamp impedance, and corresponding adjustments of the inner conductor length provide a tuning technique to compensate for these variations.read more
Citations
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Patent
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Frederick M. Espiau,Yian Chang +1 more
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References
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Patent
Microwave-excited light emitting device
TL;DR: In this article, a microwave-excited light emitting device is provided comprising an electrodeless evacuated discharge lamp containing ionizable elements mounted in the frequency determining resonator of a microwave oscillator.
Patent
Electrodeless discharge lamp and power coupler therefor
TL;DR: An electrodeless discharge lamp, consisting of a transparent envelope containing an ionizing gas and a minor amount of metallic element for producing spectral light, is started and operated by r-f power coupled to the lamp by a resonant coupler that consists of a helically coiled wire conductor mounted concentrically within a grounded hollow cylinder which is open at one end with a grounded base member in the other end as discussed by the authors.
Patent
Electrodeless light source utilizing a lamp termination fixture having parallel capacitive impedance matching capability
TL;DR: In this article, a termination fixture for use in an electrodeless light source has an input impedance which is matched to the output impedance of a high frequency power source, even though the lamp which forms the termination for the fixture has a complex impedance when the lamp is in an excited state.
Patent
Electrodeless light source having a lamp holding fixture which has a separate characteristic impedance for the lamp starting and operating mode
TL;DR: A lamp holding fixture for exciting an electrodeless lamp by high frequency power has a switchable characteristic impedance for impedance matching the lamp to the power source during both the starting and operating modes as discussed by the authors.
Patent
Termination fixture for an electrodeless lamp
TL;DR: In this article, an improved termination fixture for an electrodeless light source matches the complex impedance of a lamp during excitation to the output impedance of the high frequency power source coupled to the fixture.