LIGHT SOURCE DEVICE AND LIQUID CRYSTAL PROJECTOR USING THIS

PROBLEM TO BE SOLVED: To improve condensing efficiency by improving a structure of a light source device such as a metal halide lamp. SOLUTION: A light source device is composed of a metal halide lamp 2 of a short arc, a lamp reflector 3 to turn the light into a parallel light flux by condensing it,...

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Bibliographische Detailangaben
Hauptverfasser:	SAKAI KENZO, OGAWA MASUMI
Format:	Patent
Sprache:	eng
Schlagworte:	ACCESSORIES THEREFOR APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USINGWAVES OTHER THAN OPTICAL WAVES APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FORPROJECTING OR VIEWING THEM BASIC ELECTRIC ELEMENTS BLASTING CINEMATOGRAPHY DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH ISMODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THEDEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY,COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g.SWITCHING, GATING, MODULATING OR DEMODULATING ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS ELECTRICITY ELECTROGRAPHY FREQUENCY-CHANGING FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMSTHEREOF HEATING HOLOGRAPHY LIGHTING MECHANICAL ENGINEERING NON-LINEAR OPTICS NON-PORTABLE LIGHTING DEVICES OPTICAL ANALOGUE/DIGITAL CONVERTERS OPTICAL LOGIC ELEMENTS OPTICS PHOTOGRAPHY PHYSICS STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHERARTICLES, NOT OTHERWISE PROVIDED FOR SYSTEMS THEREOF TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLEEXTERIORS WEAPONS
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To improve condensing efficiency by improving a structure of a light source device such as a metal halide lamp. SOLUTION: A light source device is composed of a metal halide lamp 2 of a short arc, a lamp reflector 3 to turn the light into a parallel light flux by condensing it, a support cylinder part 4 and an electromagnet 5 arranged in an upper part of a back face part of the lamp reflector. When a line A of magnetic force horizontally orthogonal to the optical axis generated by the electromagnet 5 is impressed on a tubular bulb 6, a discharge arc is corrected in a straight line shape. Since a polarity reversing means is provided on the electromagnet 5, even in a condition where the light source device is inversely erected by 180 degrees, uniform brightness similar to normally erected time can be attained by switching the magnetic field direction to a line B of magnetic force from the line A of magnetic force.