LED FRESNEL LIGHTING INSTRUMENT

A Fresnel lighting instrument for use in film and video production, having a LED light engine mounted to a heat sink defining a first plane, a dual basket type focusing assembly adapted to longitudinally extend or retract a Fresnel lens away from and back to the first plane substantially without rot...

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Bibliographische Detailangaben
1. Verfasser:	COLLIAS JAMES H
Format:	Patent
Sprache:	eng
Schlagworte:	BLASTING FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMSTHEREOF HEATING INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21Sand F21V, RELATING TO THEFORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THELIGHT EMITTED INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21Sand F21V, RELATING TO USESOR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS LIGHT SOURCES NOT OTHERWISE PROVIDED FOR LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATINGELEMENTS LIGHTING MECHANICAL ENGINEERING NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHERARTICLES, NOT OTHERWISE PROVIDED FOR WEAPONS
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Beschreibung
Zusammenfassung:	A Fresnel lighting instrument for use in film and video production, having a LED light engine mounted to a heat sink defining a first plane, a dual basket type focusing assembly adapted to longitudinally extend or retract a Fresnel lens away from and back to the first plane substantially without rotation along the longitudinal range of extension, to provide a fanless, cool operating, highly compact and lightweight Fresnel light suitable for studio or field use. The dual basket type design allows for transporting three Fresnel units in a standard milk crate since the unit collapses down whereas existing Fresnel lights all use a constant volume can-shaped housing within which the light source is repositioned.