Ultraminiature broadband light source and method of manufacturing same

An ultraminiature light source using a double-spiral shaped tungsten filament includes end contact portions which are separated to allow for radial and length-wise unwinding of the spiral. The double-spiral filament is spaced relatively far apart at the end portions thereof so that contact between p...

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Hauptverfasser:	HANSEN WILLIAM W, MEYER GLENN A, COLLURA JOSEPH S, MCCONAGHY CHARLES F, TUMA MARGARET L, OLSEN BARRY L, POCHA MICHAEL D, HELVAJIAN HENRY
Format:	Patent
Sprache:	eng
Schlagworte:	BASIC ELECTRIC ELEMENTS COLORIMETRY ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS ELECTRIC INCANDESCENT LAMPS ELECTRICITY MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT,POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRA-RED,VISIBLE OR ULTRA-VIOLET LIGHT MEASURING PHYSICS RADIATION PYROMETRY TESTING
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creator	HANSEN WILLIAM W MEYER GLENN A COLLURA JOSEPH S MCCONAGHY CHARLES F TUMA MARGARET L OLSEN BARRY L POCHA MICHAEL D HELVAJIAN HENRY
description	An ultraminiature light source using a double-spiral shaped tungsten filament includes end contact portions which are separated to allow for radial and length-wise unwinding of the spiral. The double-spiral filament is spaced relatively far apart at the end portions thereof so that contact between portions of the filament upon expansion is avoided. The light source is made by fabricating a double-spiral ultraminiature tungsten filament from tungsten foil and housing the filament in a ceramic package having a reflective bottom and a well wherein the filament is suspended. A vacuum furnace brazing process attaches the filament to contacts of the ceramic package. Finally, a cover with a transparent window is attached onto the top of the ceramic package by solder reflow in a second vacuum furnace process to form a complete hermetically sealed package.
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subjects	BASIC ELECTRIC ELEMENTS COLORIMETRY ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS ELECTRIC INCANDESCENT LAMPS ELECTRICITY MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT,POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRA-RED,VISIBLE OR ULTRA-VIOLET LIGHT MEASURING PHYSICS RADIATION PYROMETRY TESTING
title	Ultraminiature broadband light source and method of manufacturing same
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