EP 0125353 A1 19841121 - Automotive headlight having optics in the reflector.
Title (en)
Automotive headlight having optics in the reflector.
Title (de)
Kraftfahrzeugscheinwerfer mit Optik enthaltendem Reflektor.
Title (fr)
Projecteur de véhicule automobile avec réflecteur formant optique.
Publication
Application
Priority
EP 83302633 A 19830510
Abstract (en)
The invention concerns the reflector of an automotive headlight which has a clear unfluted front cover (12) and a reflector (13) which directs light from a source (11) through the front cover in a desired pattern. The reflective surface is smooth and continuous formed of two edge ellipsoids (15, 16) and a center ellipsoid (14) joined in smooth continuous junctions. The center ellipsoid is modified to include a smooth vertical bump (21) and the ellipsoids are tilted off the axis of the headlight. The headlight is formed by a digital computer aided process which includes tracing the paths of a plurality of light rays emanating from a digitally modeled light source, intersecting a reflector modeled by digital shape functions and projected onto a sphere surrounding the reflector. The light intensity across a path of the sphere is compared with the prescribed automotive headlight specifications. The parameters of the shape functions are changed and the process is performed iteratively to produce a light intensity best matching the specifications.
IPC 1-7
IPC 8 full level
F21V 7/00 (2006.01)
CPC (source: EP)
F21S 41/335 (2017.12)
Citation (search report)
[X] US 3492474 A 19700127 - YAMAGUCHI SEIICHI, et al
Designated contracting state (EPC)
BE DE FR GB IT NL
DOCDB simple family (publication)
EP 0125353 A1 19841121; EP 0125353 B1 19891011; DE 3380703 D1 19891116
DOCDB simple family (application)
EP 83302633 A 19830510; DE 3380703 T 19830510