EP0767339A1 - Eine Mehrzahl von Lichtausgängen enthaltender Scheinwerfer zum Beleuchten einer Oberfläche mit verbesserter Gleichmässigkeit - Google Patents

Eine Mehrzahl von Lichtausgängen enthaltender Scheinwerfer zum Beleuchten einer Oberfläche mit verbesserter Gleichmässigkeit Download PDF

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Publication number
EP0767339A1
EP0767339A1 EP96402106A EP96402106A EP0767339A1 EP 0767339 A1 EP0767339 A1 EP 0767339A1 EP 96402106 A EP96402106 A EP 96402106A EP 96402106 A EP96402106 A EP 96402106A EP 0767339 A1 EP0767339 A1 EP 0767339A1
Authority
EP
European Patent Office
Prior art keywords
optical
light source
light
diopter
projector
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.)
Granted
Application number
EP96402106A
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English (en)
French (fr)
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EP0767339B1 (de
Inventor
Alain Verdier
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.)
Maquet SAS
Original Assignee
ALM SA
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Publication date
Application filed by ALM SA filed Critical ALM SA
Publication of EP0767339A1 publication Critical patent/EP0767339A1/de
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Publication of EP0767339B1 publication Critical patent/EP0767339B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V5/00—Refractors for light sources
    • F21V5/04—Refractors for light sources of lens shape
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2131/00—Use or application of lighting devices or systems not provided for in codes F21W2102/00-F21W2121/00
    • F21W2131/20—Lighting for medical use
    • F21W2131/205—Lighting for medical use for operating theatres
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S362/00—Illumination
    • Y10S362/804—Surgical or dental spotlight

Definitions

  • the present invention relates to the technical field of lighting projectors used in the medical sector and, in particular, intended for surgical operating rooms.
  • the object of the invention relates, more precisely, to projectors of the multi-porthole type, that is to say those comprising one or more light sources from each of which is formed a series of light beams of illumination.
  • patent FR 2 339 129 describes a lighting projector comprising, in a housing, two lighting systems each comprising a light source on either side of which are arranged a frosted surface and a condenser optical system composed of two lenses and forming a main light beam.
  • An optical element is placed on the path of each main light beam to form, after reflection on a mirror and passage through a window formed in the casing, an image of the surface frosted in a plan of use to be lit.
  • the plan of use considered is illuminated by the light beams coming from the mirrors which are suitably oriented so that the axes of the beams converge towards the same point corresponding to the center of the field to be illuminated.
  • Such a projector is designed to eliminate drop shadows allowing its particular use in surgical operating rooms.
  • This projector also makes it possible to obtain a uniform field of illumination of high luminous intensity with cold light.
  • the light sources are placed in the central region of the casing from which extend radial arms arranged to include the portholes for passage of the light beams.
  • the realization of the projector in the form of a star casing has the advantage of limiting its overall dimensions or obstruction in the horizontal plane, while making it possible to disturb as little as possible, the ventilation of the space in which the projector is installed.
  • the present invention therefore aims to remedy the drawbacks set out above and to propose a projector making it possible to improve the homogenization of the lit area and the sharpness of the outline of the lit area.
  • the object of the invention relates to a lighting projector intended, in particular, for surgical operating rooms, of the type comprising in a housing, at least one lighting system comprising at least one light source. from which at least two main light beams are formed, on the path of each of which is placed an optical element capable of forming an image of the light source in a plane to be illuminated, after reflection on a mirror and passage through said optical element and through a porthole in the casing.
  • the optical elements are arranged to each constitute a passage window comprising, on the one hand, a first diopter ensuring an optical conjugation of the light source on the plane to be illuminated, while optimizing the correction of optical aberrations and, on the other hand, a second diopter ensuring a multiplication of the image of the source to allow uniformity of the illumination in the illuminated plane.
  • Another object of the invention aims to eliminate another disadvantage of the projector described in patent FR 2 339 129, due to the fact that it is planned to interpose on the path of a light beam, between a mirror and the source. light, an intermediate deflection mirror.
  • the optical paths of the beams coming from the intermediate mirror and from the extreme mirror are of different lengths. It follows that the contributions of each beam are not geometrically identical, so that the lit area does not have a uniform contour.
  • the object of the invention is to propose, also, a projector in which the number of light beams illuminating the area is increased without. however, increase the number of optical elements and while controlling the contributions made by each beam.
  • the projector according to the invention is characterized in that at least one of the optical elements constitutes a passage window for a light beam derived from the main beam, by an intermediate deflection mirror interposed between a mirror and the light source and allowing the other part of the main beam to pass in the direction of the associated deflection mirror, the optical element having a first diopter adapted to adjust the size of the light spot created by the beam on the plane to be illuminated.
  • the optical elements are adapted so that the first diopter makes it possible to form the image of the light source in a single common plane making it possible to obtain a superposition of the different beams, in order to obtain an illuminated beach with a uniform outline.
  • Fig. 1 is a partial vertical section showing a first embodiment of a lighting projector according to the invention.
  • Fig. 2 is a section taken substantially along the lines II-II of FIG. 1 .
  • Fig. 3 is a side view of an exemplary embodiment of an optical element according to the invention.
  • Fig. 4 is a view of the external face of the optical element taken substantially along the lines IV-IV of FIG. 3 .
  • Fig. 5 is a partial view in vertical section showing another alternative embodiment of a projector according to the invention.
  • Fig. 6 is a schematic view showing another embodiment of the invention.
  • the projector lighting I is intended, in particular, for surgical operating rooms.
  • the headlamp I comprises, in a casing 1 , a lighting system 2 comprising a light source 3 , from which at least two are formed, and in the example illustrated, four main light beams L 1 to L 4 .
  • Each light beam L 1 to L 4 is formed using a condenser optical system 4 composed, for example, of two lenses 5 and 6 making it possible to concentrate a maximum of light energy in a beam of restricted section.
  • the optical condenser systems 4 are placed in the immediate vicinity of the light source 3 .
  • the light beams L 1 to L 4 are intended to meet a deflection mirror 8 , the reflecting surface of which is conventionally constituted by a complex system of thin interference layers making it possible to reflect only the visible light rays while letting the heat rays pass through. .
  • the heat rays pass through each of the mirrors 8 and are collected by an end element 9 forming a radiator, so as to ensure the evacuation of the heat rays.
  • deflection mirrors 8 which are each inclined opposite a porthole 11 passing through for a light beam.
  • the deflection mirrors 8 are inclined to form convergent beams whose axes A are distributed over the generatrices of a cone whose apex S coincides with the center of the lit area 12 in a plane P.
  • each passage porthole 11 is formed in the wall of the casing 1 disposed opposite the plane P to be lit.
  • each passage porthole 11 is formed in an arm 13 extending radially from the center of the casing produced in the form of a central housing 14 .
  • the central housing 14 of the casing contains the light source 3 and the condenser optical systems 4 , while the radial arms 13 , four in number in the example illustrated, each have a porthole 11 and the associated mirror 8 .
  • each passage window 11 constitutes a optical element capable of forming an image of the light source 3 in the plane P to be illuminated.
  • each passage porthole 11 comprises, on the one hand, a first diopter d 1 ensuring an optical conjugation of the filament of the light source 3 on the surface to be lit 12 , while optimizing the correction of optical aberrations and, d on the other hand, a second diopter d 2 ensuring a multiplication of the image of the light source 3 to allow uniformity of the illumination in the illuminated plane P.
  • the first diopter d 1 thus constitutes a transparent surface designed to form the image of the light source in the plane to be illuminated and to eliminate, in particular, at the periphery of the lit area, the colored halos constituting optical aberrations, such as chromatism lateral or coma.
  • the first diopter d 1 has a spherical profile.
  • the second diopter d 2 provides a multiplication of the number of images of the light source 3 , with a view to obtaining a homogenization of the lit area.
  • the second diopter d 2 can be constituted by a multitude of small spherical, aspherical or prismatic surfaces, arranged in a matrix form, as is clear from FIG. 4 .
  • each optical element 11 is constituted by a monobloc element composed of the first diopter and the second diopter. More preferably, the first diopter d 1 is formed by the inner surface directed towards the associated deflecting mirror 8 , while the second diopter d 2 is formed by the outer surface directed towards the plane P to be illuminated.
  • each optical element 11 has a first diopter d 1 having different powers in two directions, in order to ensure better conjugation of the light source as a function of its geometry and of its positioning.
  • the light source 3 is mounted so that its filament 3 1 is disposed substantially diagonally to the optical axes of the various light beams L 1 to L 4 .
  • the internal diopter d 1 therefore has a profile which varies to take account of the position and the geometry of the light source 3 .
  • the light source 3 is arranged, preferably but not exclusively, so that part of its light beam, exiting through its apex, is recovered by a condenser optical system 4 for forming a light beam L 5 directed towards a direct passage window 11 1 constituting an optical element similar to the elements 11 according to the invention.
  • the direct passage window 11 1 is formed in the housing 14 of the casing, being centered on the optical axis O of the headlight passing through the center S of the illuminated surface 12 .
  • the formation of five light beams L 1 to L 5 makes it possible to optimize the light output of the projector according to the invention.
  • Fig. 5 illustrates another alternative embodiment of a headlamp according to the invention comprising an intermediate deflection mirror 16 interposed on the path of each main light beam L 1 to L 4 .
  • Each intermediate deflection mirror 16 is designed to allow part of the beam to pass and another part directed towards a passage window 11 2 according to the invention, with a function similar to the optical elements 11 .
  • a single intermediate deflection mirror 16 is placed on the path of each of the light beams L 1 to L 4 .
  • provision may be made, one behind the other, for several intermediate deflection mirrors 16 on each of the light beams, the derived light beams being each directed towards an optical element 11 2 according to the invention.
  • the optical paths of the light beams passing through the windows 11 and 11 2 are different.
  • the first diopters d 1 of the optical elements 11 , 11 1 , 11 2 are adapted to form the image of the light source 3 in a single common plane P , so that the contributions of each beam passing through the windows 11 to 11 2 are substantially identical geometrically. This results in a superposition of the spots created by each of the light beams, which makes it possible to obtain an illuminated area 12 with a uniform outline. It must therefore be considered that the first diopters of 1 provide, in this variant embodiment, an additional function of adapting the size of the spots.
  • the first diopters d 1 are adapted so that the spots created by each beams from the windows have substantially the same size in the same plane P. It should be noted that in certain applications, provision may be made for the first diopters d 1 of the optical elements to be adapted to form the image of the light source in at least two planes offset along the optical axis O of the projector.
  • the projector I comprises a lighting system 2 composed of a single light source 3 , from which a direct light beam is optionally formed and either four ( fig. 1, 2 ) or eight ( fig 5 ) main light beams.
  • a lighting system comprising a different number of main light beams.
  • the projector I comprises two lighting systems 2 and 2 ′, the light sources 3 and 3 ′ of which are placed in the central housing 14 , while the deflection mirrors and the optical elements 11, 11 ′ of each of the lighting systems are placed in the radial arms 13 . Provision may be made for a spotlight comprising a number of lighting systems 2 , 2 ′ greater than two and comprising or not comprising one or more intermediate deflection mirrors 16 .

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Optical Elements Other Than Lenses (AREA)
  • Lenses (AREA)
EP96402106A 1995-10-05 1996-10-03 Eine Mehrzahl von Lichtausgängen enthaltender Scheinwerfer zum Beleuchten einer Oberfläche mit verbesserter Gleichmässigkeit Expired - Lifetime EP0767339B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9511719A FR2739676B1 (fr) 1995-10-05 1995-10-05 Projecteur multi-hublots ameliorant l'homogeneite de la plage eclairee
FR9511719 1995-10-05

Publications (2)

Publication Number Publication Date
EP0767339A1 true EP0767339A1 (de) 1997-04-09
EP0767339B1 EP0767339B1 (de) 2003-04-09

Family

ID=9483273

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96402106A Expired - Lifetime EP0767339B1 (de) 1995-10-05 1996-10-03 Eine Mehrzahl von Lichtausgängen enthaltender Scheinwerfer zum Beleuchten einer Oberfläche mit verbesserter Gleichmässigkeit

Country Status (5)

Country Link
US (1) US5765943A (de)
EP (1) EP0767339B1 (de)
DE (1) DE69627264T2 (de)
ES (1) ES2196131T3 (de)
FR (1) FR2739676B1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2861186A1 (fr) * 2003-10-21 2005-04-22 Alm Ensemble optique et dispositif d'eclairage correspondant.

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5892867A (en) * 1995-01-17 1999-04-06 Remote Source Lighting International, Inc. Spherical multiport illuminator optic design for light guides
US5951139A (en) * 1997-04-17 1999-09-14 Steris Corporation Surgical light with reflector-lamps and flat reflector panels
EP1148860A4 (de) * 1998-12-17 2002-10-09 Getinge Castle Inc Beleuchtungssystem für chirurgische einrichtungen
WO2003054445A1 (en) * 2000-12-20 2003-07-03 Hyperboloid Corporation Searchlight with improved optical density
FR2851028B1 (fr) * 2003-02-06 2006-01-27 Alm Dispositif d'eclairage
US7300176B2 (en) * 2003-05-02 2007-11-27 Irwin Kotovsky Method and apparatus for lighting with reflection
TW201017051A (en) * 2008-10-17 2010-05-01 Ind Tech Res Inst Illumination system

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1034116B (de) * 1957-02-23 1958-07-17 Hensoldt & Soehne M Beleuchtungseinrichtung, insbesondere Operationsleuchte
FR2109954A5 (de) * 1970-10-07 1972-05-26 Oram John
FR2339129A2 (fr) * 1976-01-21 1977-08-19 Angenieux P Ets Projecteur d'eclairage
DE3324028A1 (de) * 1983-07-04 1985-01-17 Christian 8000 München Bartenbach Leuchte mit einer lichtquelle hoher leuchtdichte

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1277110A (en) * 1917-04-16 1918-08-27 Bausch & Lomb Operating-table illuminator.
FR792629A (fr) * 1935-07-17 1936-01-07 Anciens Ets Barbier Appareil d'éclairage
LU65808A1 (de) * 1972-07-27 1972-11-29
US4068117A (en) * 1976-01-21 1978-01-10 Etablissements Pierre Angenieux Lighting projector
US4912613A (en) * 1989-02-27 1990-03-27 Mdt Corporation Cover lens for light

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1034116B (de) * 1957-02-23 1958-07-17 Hensoldt & Soehne M Beleuchtungseinrichtung, insbesondere Operationsleuchte
FR2109954A5 (de) * 1970-10-07 1972-05-26 Oram John
FR2339129A2 (fr) * 1976-01-21 1977-08-19 Angenieux P Ets Projecteur d'eclairage
DE3324028A1 (de) * 1983-07-04 1985-01-17 Christian 8000 München Bartenbach Leuchte mit einer lichtquelle hoher leuchtdichte

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2861186A1 (fr) * 2003-10-21 2005-04-22 Alm Ensemble optique et dispositif d'eclairage correspondant.
EP1526327A1 (de) * 2003-10-21 2005-04-27 Alm Optische Anordnung und Vorrichtung zur Beleuchtung von Operationsfeldern
US7261429B2 (en) 2003-10-21 2007-08-28 Alm Optical assembly and corresponding illumination device

Also Published As

Publication number Publication date
DE69627264T2 (de) 2004-03-25
DE69627264D1 (de) 2003-05-15
US5765943A (en) 1998-06-16
FR2739676B1 (fr) 1997-11-14
FR2739676A1 (fr) 1997-04-11
EP0767339B1 (de) 2003-04-09
ES2196131T3 (es) 2003-12-16

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