GB890072A - Projector of radiations - Google Patents

Projector of radiations

Info

Publication number
GB890072A
GB890072A GB11082/60A GB1108260A GB890072A GB 890072 A GB890072 A GB 890072A GB 11082/60 A GB11082/60 A GB 11082/60A GB 1108260 A GB1108260 A GB 1108260A GB 890072 A GB890072 A GB 890072A
Authority
GB
United Kingdom
Prior art keywords
reflector
slot
source
radiations
conics
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.)
Expired
Application number
GB11082/60A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB11082/60A priority Critical patent/GB890072A/en
Publication of GB890072A publication Critical patent/GB890072A/en
Expired 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
    • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
    • F21S41/162—Incandescent light sources, e.g. filament or halogen lamps
    • 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
    • F21S41/33—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature
    • F21S41/338—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature the reflector having surface portions added to its general concavity
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

890,072. Lamp reflectors. PERRET, S. L. March 29, 1960, No. 11082/60. Class 75(2) [Also in Group XX] A projector of radiations comprises a source 31 of radiations of the pin-point type and a reflector 33 of elongated shape, adapted to concentrate the radiations of the source through a longitudinal rectilinear slot in the reflector, characterized in that the reflector has a surface the sections of which through planes parallel to the slot and passing through the centre of the source are conics the first foci of the elliptical sections being aligned along a focal axis in the plane of the slot and parallel thereto, the other foci of the elliptical sections being placed on a conic the apex of which coincides with the centre of the source and the focus of the median elliptical section, in such a way that the radiations emanating from the source and reflected by the reflector are brought back near to the axis of the longitudinal slot and emitted through the said slot in the shape of a dihedron of rectangular straight section. The two systems of conics may have a common apex the curves passing through the apex having a first common focus and second foci situated in the straight line defined by the apex, and the common focus, the source being situated at the common focus. The reflector may have additional surfaces constituted by two systems of curves or by screens to limit the area illuminated and to limit direct illumination from the source. One of the systems of conics may have a skew surface. To vary the width of the slot or to displace it to one or other side of the focal axis the plane or curved surfaces 34, 35 defining the slot have adjustable shutters 36, 37. The reflector may be replaced by a light bulb having the curved surface and metallized except at the slot. A second reflector 38 may be fitted on the first reflector. The reflector has a surface the directrices of which are open conics the active foci of which lie on a common axis in the plane of the slot and coincides with the focal axis of the first reflector and the radiations emitted by the source and concentrated on the surface strike against the second reflector.
GB11082/60A 1960-03-29 1960-03-29 Projector of radiations Expired GB890072A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB11082/60A GB890072A (en) 1960-03-29 1960-03-29 Projector of radiations

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB11082/60A GB890072A (en) 1960-03-29 1960-03-29 Projector of radiations

Publications (1)

Publication Number Publication Date
GB890072A true GB890072A (en) 1962-02-28

Family

ID=9979706

Family Applications (1)

Application Number Title Priority Date Filing Date
GB11082/60A Expired GB890072A (en) 1960-03-29 1960-03-29 Projector of radiations

Country Status (1)

Country Link
GB (1) GB890072A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2150275A (en) * 1983-11-26 1985-06-26 Bosch Gmbh Robert Headlamp for motor vehicles
EP0210406A2 (en) * 1985-07-31 1987-02-04 Robert Bosch Gmbh Motor vehicle headlight

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2150275A (en) * 1983-11-26 1985-06-26 Bosch Gmbh Robert Headlamp for motor vehicles
EP0210406A2 (en) * 1985-07-31 1987-02-04 Robert Bosch Gmbh Motor vehicle headlight
EP0210406A3 (en) * 1985-07-31 1988-01-20 Robert Bosch Gmbh Anti-fog motor vehicle headlight

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