EP0317844A3 - Reflector for the formation of the light-dark limit in vehicle headlamps - Google Patents

Reflector for the formation of the light-dark limit in vehicle headlamps Download PDF

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Publication number
EP0317844A3
EP0317844A3 EP88118816A EP88118816A EP0317844A3 EP 0317844 A3 EP0317844 A3 EP 0317844A3 EP 88118816 A EP88118816 A EP 88118816A EP 88118816 A EP88118816 A EP 88118816A EP 0317844 A3 EP0317844 A3 EP 0317844A3
Authority
EP
European Patent Office
Prior art keywords
reflector
light
effective edge
plane
formation
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP88118816A
Other languages
German (de)
French (fr)
Other versions
EP0317844A2 (en
Inventor
Friedrich Dr. Prinzenhausen
Gerd Dipl.-Math. Fürter
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP0317844A2 publication Critical patent/EP0317844A2/en
Publication of EP0317844A3 publication Critical patent/EP0317844A3/en
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/30—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
    • F21S41/32—Optical layout thereof
    • F21S41/36—Combinations of two or more separate reflectors
    • F21S41/365—Combinations of two or more separate reflectors successively reflecting the light

Abstract

Das Reflektorsystem hat einen Primärreflektor (1), welcher das Licht eines Leuchtkörpers (3) auf eine Blende (7 bzw. 18) mit optisch wirksamer Kante (8 bzw. 19a, 19b) wirft sowie einen Sekundärreflek­ tor (4 bzw. 20a, 20b) der die optisch wirksame Kante (8 bzw. 19a, 19b) durch Schattenwurf als Gerade (11 bzw. 22, 23) auf einer in ei­ nem vorgegebenen Abstand vom Sekundärreflektor (4 bzw. 20a, 20b) senkrecht zur Fahrbahnebene angeordneten Ebene (10 bzw. 21) sichtbar macht. Der Sekundärreflektor (4 bzw. 20a, 20b) ist als Teil minde­ stens eines zum Primärreflektor (1) hin offenen Ellipsenzylinders ausgebildet, dessen senkrecht zur Längsachse des Zylinders verlau­ fenden Querschnitte (6a, 6b) gleiche Krümmung aufweisen. Die Ellipse eines jeden Querschnitts (6a, 6b) hat ihren einen Brennpunkt (14a bzw. 14b) in der optisch wirksamen Kante (8 bzw. 19a, 19b) der Blende (7 bzw. 18) und ihren anderen Brennpunkt (15a bzw. 15b) in der Geraden (11 bzw. 22, 23) der Abbildungsebene (10 bzw. 21). The reflector system has a primary reflector (1), which is the light of a luminous element (3) on an aperture (7 or 18) with optical effective edge (8 or 19a, 19b) and a secondary reflect gate (4 or 20a, 20b) of the optically effective edge (8 or 19a, 19b) by casting shadows as a straight line (11 or 22, 23) on one in an egg a specified distance from the secondary reflector (4 or 20a, 20b) Plane (10 or 21) arranged perpendicular to the carriageway plane is visible makes. The secondary reflector (4 or 20a, 20b) is part of mind at least one elliptical cylinder open towards the primary reflector (1) trained, the perpendicular to the longitudinal axis of the cylinder cross sections (6a, 6b) have the same curvature. The ellipse each cross section (6a, 6b) has its one focal point (14a or 14b) in the optically effective edge (8 or 19a, 19b) of the Aperture (7 or 18) and its other focal point (15a or 15b) in the straight line (11 or 22, 23) of the imaging plane (10 or 21).

EP88118816A 1987-11-26 1988-11-11 Reflector for the formation of the light-dark limit in vehicle headlamps Withdrawn EP0317844A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3740104 1987-11-26
DE3740104A DE3740104C1 (en) 1987-11-26 1987-11-26 Reflector optics for mapping the light-dark boundary in headlights for road vehicles

Publications (2)

Publication Number Publication Date
EP0317844A2 EP0317844A2 (en) 1989-05-31
EP0317844A3 true EP0317844A3 (en) 1990-04-04

Family

ID=6341338

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88118816A Withdrawn EP0317844A3 (en) 1987-11-26 1988-11-11 Reflector for the formation of the light-dark limit in vehicle headlamps

Country Status (2)

Country Link
EP (1) EP0317844A3 (en)
DE (1) DE3740104C1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11079085B2 (en) 2018-07-23 2021-08-03 Valeo North America, Inc. Dynamic bending light module

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1389291A (en) * 1920-01-08 1921-08-30 Evan P Bone Headlamp
DE382079C (en) * 1923-09-28 Jean Barrollier Headlights
FR2263455A1 (en) * 1974-03-05 1975-10-03 Lucas Electrical Co Ltd

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3317149A1 (en) * 1983-05-11 1984-11-15 Robert Bosch Gmbh, 7000 Stuttgart LOW BEAM HEADLIGHT FOR ROAD VEHICLES

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE382079C (en) * 1923-09-28 Jean Barrollier Headlights
US1389291A (en) * 1920-01-08 1921-08-30 Evan P Bone Headlamp
FR2263455A1 (en) * 1974-03-05 1975-10-03 Lucas Electrical Co Ltd

Also Published As

Publication number Publication date
EP0317844A2 (en) 1989-05-31
DE3740104C1 (en) 1989-05-18

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