Osram Sylvania Inc.

Joanne M Browne

Walter Peter Lapatovich

George C Wei

Gregory Zaslavsky

A Bowman Budinger

Madis Raukas

Nancy H Chen

Arlene Hecker

Lori R Brock

Fred L Palmer

Kailash C Mishra

James A Avallon

Cathy Shaw Trumble

Karlene J Zuk

Joseph A Baglio

A method of making an HID lamp and an HID lamp that includes a ceramic envelope with a ceramic capillary, wherein the capillary has an electrode feed-through therein that is sealed inside the capillary by a frit seal that extends inside the capillary a first distance from a distal end of the capillary, and a ceramic heat sink around at least half an external diameter of the capillary, wherein the heat sink is separated from the envelope and from the distal end of the capillary and the heat sink is in thermally conductive contact with the capillary and has an external diameter at least 1.5 times the external diameter of the capillary. In one preferred embodiment, the heat sink does not overlap the frit seal.

HID lamp with frit seal thermal control

A ceramic discharge vessel is provided wherein the vessel comprises a hollow body for enclosing a discharge and the hollow body is made of a polycrystalline dysprosium oxide containing a luminescent dopant that emits one or more visible light wavelengths when stimulated by radiation generated by the discharge. Preferably, the polycrystalline dysprosium oxide has been doped with one or more of europium, cerium, or terbium in an amount from about 0.1 to about 10 percent by weight on an oxide basis.

Doped dysprosia discharge vessel

A metal halide fill for a discharge lamp is provided that is comprised of mercury and a mixture of metal halide salts which includes magnesium iodide as a full or partial replacement for calcium iodide. The replacement of at least some of the calcium iodide improves the behavior of the molten salt condensate in the arc tube. In particular, the mixture of metal halide salts contains about 1 to about 50 mole percent sodium iodide, about 15 to about 50 mole percent of a rare earth iodide, about 10 to about 30 mole percent magnesium iodide, about 10 to about 25 mole percent of indium iodide, and about 0 to about 25 mole percent calcium iodide, wherein the sum of the amounts of calcium iodide and magnesium iodide in the mixture is from about 20 to about 45 mole percent.

Metal halide lamp chemistries with magnesium and indium

A fluted feed-through for a discharge lamp includes a fluted ceramic core with plural channels and plural individual molybdenum or tungsten wires running in different ones of the plural channels. The wires are twisted together at the ends of the feed-through. The feed-through is insertable into a capillary tube of a ceramic discharge lamp. The wires of the feed-through have a different thermal coefficient of expansion than the ceramic discharge lamp. The wires are thin enough so that the absolute magnitude of the thermal coefficients of expansion is sufficiently small to prevent seal cracks and leaking.

Discharge lamp having a fluted electrical feed-through

An electrodeless high intensity discharge lamp with a lamp fill material including gallium iodide has been found to be more efficient in generating light in general, and more efficient in generating blue light. The very small size of the lamp, in combination with the high intensity in a relatively narrow blue spectral range make the lamp particularly useful in supplying blue light to a fiber optic. The relative efficiency of the lamp increases its value. In combination, the lamp provides a useful, efficient source of blue light as an input source for optical fiber, and other systems for medical and other processes using blue light as a process element.

Blue light electrodeless high intensity discharge lamp system

Growing community of inventors

Newburyport, MA, United States of America

Joanne M Browne