EP 1241399 B1 20080528 - Optical system for stepped lens projector
Title (en)
Optical system for stepped lens projector
Title (de)
Optisches System für Stufenlinsenscheinwerfer
Title (fr)
Système optique pour projecteur avec une lentille à échelons
Publication
Application
Priority
DE 10113385 A 20010316
Abstract (en)
[origin: JP2002324410A] PROBLEM TO BE SOLVED: To provide an improved optical system for Fresnel lens light, especially for spotlight or floodlight which maintains a uniformity of the light intensity on a lighting region and simultaneously improves the light efficiency. SOLUTION: The optical system for Fresnel lens is composed of an ellipsoidal reflector (1), a light source (2) and at least one Fresnel lens (3). The distance (a) between at least one Fresnel lens (3) and the ellipsoidal reflector (1) is related to the distance (b) between the light source (2) and the ellipsoidal reflector (1), and is determined by a predetermined caliber angle for the propagating light beam of the Fresnel lens light.
IPC 8 full level
F21S 2/00 (2006.01); F21S 8/00 (2006.01); F21S 10/00 (2006.01); F21V 5/02 (2006.01); F21V 13/00 (2006.01); F21V 14/02 (2006.01); F21V 5/04 (2006.01); F21V 7/22 (2006.01); F21V 13/04 (2006.01); F21W 131/406 (2006.01); F21Y 101/00 (2016.01)
CPC (source: EP US)
F21V 5/045 (2013.01 - EP US); F21V 7/24 (2018.01 - EP US); F21V 14/02 (2013.01 - EP US); F21V 13/04 (2013.01 - EP US); F21W 2131/406 (2013.01 - EP US)
Citation (examination)
EP 0846913 A1 19980610 - WEIGERT DEDO FILM GMBH [DE]
Designated contracting state (EPC)
CH DE FR GB IT LI
DOCDB simple family (publication)
EP 1241399 A2 20020918; EP 1241399 A3 20050413; EP 1241399 B1 20080528; DE 10113385 C1 20020829; DE 50212306 D1 20080710; JP 2002324410 A 20021108; JP 2008288215 A 20081127; JP 4792486 B2 20111012; US 2003063466 A1 20030403; US 6899451 B2 20050531
DOCDB simple family (application)
EP 02003626 A 20020216; DE 10113385 A 20010316; DE 50212306 T 20020216; JP 2002064701 A 20020311; JP 2008184507 A 20080716; US 9688702 A 20020313