Light beam spreader

A beam spreading device 12 for use with a centralized lighting system and which can be applied to emergency vehicle lighting applications achieves a beam pattern light output which is essentially continuous over an output range of plus and minus 45 degrees from a center point. The beam pattern light...

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Bibliographic Details
Main Authors JOHN MARTIN DAVENPORT, TIMOTHY J MAZIES, WILLIAM JAMES CASSARLY, RICHARD LOWELL HANSLER
Format Patent
LanguageEnglish
Published 12.08.1998
Edition6
Subjects
ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING ORSUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES INGENERAL
BLASTING
FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMSTHEREOF
HEATING
INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21Sand F21V, RELATING TO USESOR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
LIGHTING
MECHANICAL ENGINEERING
NON-PORTABLE LIGHTING DEVICES
OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
OPTICS
PERFORMING OPERATIONS
PHYSICS
STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHERARTICLES, NOT OTHERWISE PROVIDED FOR
SYSTEMS THEREOF
TRANSPORTING
VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLEEXTERIORS
VEHICLES IN GENERAL
WEAPONS
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Summary:A beam spreading device 12 for use with a centralized lighting system and which can be applied to emergency vehicle lighting applications achieves a beam pattern light output which is essentially continuous over an output range of plus and minus 45 degrees from a center point. The beam pattern light output is different in two orthogonal axis and spread in the horizontal direction. The beam spreading device is disk shaped and has at least one non-curved surface which mixes the light travelling therethrough so as to achieve the continuous light output. Side wall surfaces of the beam spreading device provide for total internal reflectance properties. A color wheel 18 can be interposed between the output of optical fibers 16 which transmit the light from the centralized light source to the necessary remote location, and the beam spreading device. The color wheel provides the ability to generate different color light outputs from a single light source. One side wall portion may be curved to enable significant packaging depth advantages.
Bibliography:Application Number: GB19980007873