EP 0075786 B1 19850410 - PROJECTOR, PARTICULARLY A VEHICLE HEADLAMP
Title (en)
PROJECTOR, PARTICULARLY A VEHICLE HEADLAMP
Publication
Application
Priority
- DE 3138641 A 19810929
- DE 3139943 A 19811008
Abstract (en)
[origin: EP0075786A1] 1. Headlamp, in particular for motor vehicles, wherein - a rectangular reflector (101) has a paraboloid horizontal sector (102) and, with reference to the reflector axis (109) in the direction of use, an upper and lower sector (103, 104), - the three sectors (102, 103, 104) join plane surfaces (108) radial to the axis (109), - the focal points of the three sectors (102, 103, 104) are approximately identical, and - the focal lengths of the upper and lower sectors (103, 104) are identical but smaller than the focal length of the paraboloid horizontal sector (102), characterised in that - the upper and lower sectors (103, 104) are part of an encasing, the vertical section of which is a parabola and the horizontal section of which is an ellipse or a hyperbola, - the focal length of the parabola of the vertical section is smaller than the focal length of the paraboloid horizontal sector (102), and - curves of intersection which are produced by the intersection of planes perpendicular to the axis (109) with the upper and lower sectors are ellipse segments, the semi-axes of which are perpendicular to the axis (109), one semi-axis lying in the horizontal meridional intersecting plane (105).
IPC 1-7
IPC 8 full level
F21V 7/00 (2006.01)
CPC (source: EP)
F21S 41/336 (2017.12)
Designated contracting state (EPC)
DE FR GB IT
DOCDB simple family (publication)
EP 0075786 A1 19830406; EP 0075786 B1 19850410; DE 3139943 A1 19830414; DE 3263003 D1 19850515
DOCDB simple family (application)
EP 82108538 A 19820916; DE 3139943 A 19811008; DE 3263003 T 19820916