Gte Laboratories Incorporated

William F Nelson

Paul O Haugsjaa

Robert J Regan

William H McNeill

Romano G Pappalardo

Leslie A Riseberg

Richard M Klein

Joel I Krugler

A luminescent glass comprising a host material consisting essentially of 25 to 36 mole percent Al.sub.2 O.sub.3, the balance P.sub.2 O.sub.5, and which is doped with cerium and terbium. The glass is an efficient emitter of visible radiation, predominantly green, when excited by ultraviolet radiation.

Aluminophosphate luminescent glass

A method for increasing the yield of recoverable sugar from sugar beets is disclosed, wherein the beets are illuminated during at least a portion of the night with light having a wavelength in the range of 560nm to 700nm.

Process for improving the yield of sugar beets using low intensity light

An electrodeless lamp is positioned at the end of an inner and outer conductor forming a termination fixture, the inner conductor being shaped such that the arc within the lamp during excitation is isolated from the wall of the lamp envelope. The inner conductor may be formed as a hollow helical element thereby providing both an axial and azimuthal electric field component. Alternatively, the inner conductor may be cup-shaped which has a shielding effect to control the electric field strength at the end of the conductor. The helical or cup element and other features of the inner conductor provide both arc shaping and impedance matching between the complex impedance of the lamp during operation and the output impedance of a high frequency power source which is coupled to the termination fixture.

Electrodeless light source having improved arc shaping capability

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Weston, MA, United States of America

William F Nelson