EP0268117A2 - Reflektor für zahnärztliche und chirurgische Operationsleuchten - Google Patents

Reflektor für zahnärztliche und chirurgische Operationsleuchten Download PDF

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Publication number
EP0268117A2
EP0268117A2 EP87115882A EP87115882A EP0268117A2 EP 0268117 A2 EP0268117 A2 EP 0268117A2 EP 87115882 A EP87115882 A EP 87115882A EP 87115882 A EP87115882 A EP 87115882A EP 0268117 A2 EP0268117 A2 EP 0268117A2
Authority
EP
European Patent Office
Prior art keywords
reflector
plane
light
focal point
light field
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Withdrawn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
EP87115882A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0268117A3 (de
Inventor
Harry Wagener
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.)
AUER-SOG Glaswerke GmbH
Auer Lighting GmbH
Original Assignee
AUER-SOG Glaswerke GmbH
Auer Lighting 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 AUER-SOG Glaswerke GmbH, Auer Lighting GmbH filed Critical AUER-SOG Glaswerke GmbH
Publication of EP0268117A2 publication Critical patent/EP0268117A2/de
Publication of EP0268117A3 publication Critical patent/EP0268117A3/de
Withdrawn legal-status Critical Current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
    • F21V7/00—Reflectors for light sources
    • F21V7/04—Optical design
    • F21V7/09—Optical design with a combination of different curvatures
    • 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
    • F21W2131/202—Lighting for medical use for dentistry
    • 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 invention relates to a reflector according to the preamble of claim 1.
  • the combination of ellipsoid and paraboloid (for example DE 24 46 521, US 3 191 023) basically opens up the possibility of producing an elongated light field at a desired working distance from the light source in the usual use of an elongated light source, in particular an incandescent filament. This represents a significant advantage over reflectors in the form of an ellipsoid section (US 3,511,983, 4,149,227) or a paraboloid section (US 4,459,647).
  • the subdivision of the reflector into several partial areas has the disadvantage that it is not possible to evaporate thin coatings with a uniform thickness.
  • the composition of partial areas in reflectors with the basic shape of an ellipsoid-paraboloid section mentioned at the outset is considerably more complex than in the case of simple basic shapes.
  • an ellipsoid-paraboloid In the case of a known reflector of the type mentioned at the outset (JG Holmes, Lighting Research and Technology, 1979, Volume 11, No. 2, pages 95-98), the basic form of an ellipsoid-paraboloid is one in which one parabolic or one in two normal axial planes is elliptical in shape, in the transition areas between these axial planes so shaped that all plane cuts are normal to the ellipse plane parabolas and all rays emerging from the closer ellipsoid focal point and the associated paraboloid focal point are parallel to the ellipse Plane are reflected and go through a normal focal line of the further ellipse focal point to the ellipse plane.
  • the invention is based on the task of creating a reflector which is suitable for surgical lights and which on its own generates an almost rectangular and largely uniformly illuminated light field.
  • the basic ellipsoid-paraboloid shape is deliberately distorted in such a way that a desired approximately rectangular light field is illuminated more uniformly in the region of the focal line corresponding to the basic shape.
  • the distortion can easily be produced continuously, so that neither edges or discontinuities nor the disadvantages resulting therefrom need to be accepted and simple production is possible.
  • Additional partial mirrors are not required, but can of course also be attached for special purposes.
  • the shape of the reflector is defined by a simple closed mathematical relationship that can be conveniently entered into an automatic manufacturing machine.
  • the vertex Z of the reflector 1 is in the origin of a Cartesian coordinate system with the axes x, y and z (FIG. 1).
  • the z axis extends in the vertical direction, while the x axis coincides with the optical axis.
  • the center Z 'of the lamp filament is at f l ; 0; 0.
  • the basic shape of the reflector 1 can be described as follows:
  • the real, not arbitrarily small lamp filament generates light rays whose origin is more or less far from the point f1: 0; 0. This results in natural light scattering.
  • the distortions of the parabolic ellipsoid are at their greatest, so that both light-scattering effects largely overlap to form a basic scatter that is uniform over all reflector parts.
  • An almost rectangular light field 2 thus arises, the width b of which is determined primarily by the width B of the reflector and secondly by the length of the lamp filament in the y direction.
  • the height h of the light field 2 is essentially determined by the width of the lamp filament in the z direction, but also by the lashings mentioned by the parabolic ellipsoid at its points remote from the axis.
  • the lamp filament has an extensive winding and thus a very inhomogeneous luminance distribution, this will be reflected in the imaging properties of the reflector in a certain unevenness in the illuminance in the light field. Then it is advantageous if the basic shape of the parabolic ellipsoid is superimposed on a weak light-scattering structure. The uniformity of the illumination of the light field 2 is then significantly improved without the width and height of the light field being significantly increased.
  • the superimposed light-scattering structure can be applied without an additional operation in the case of a numerically controlled milling of the mold for the parabolic ellipsoid (see FIG. 4).
  • a suitable milling cutter diameter of 2 0 small cylindrical outer surfaces of the radius r are automatically created, the width b and height h of which are formed by the respective step sizes in the numerically controlled milling process.
  • this circular ellipsoid can be represented mathematically as follows: Then for y ⁇ R
  • the parabola can be replaced by an arc. This can result in advantages for the production of the molds in certain manufacturing processes.
EP87115882A 1986-11-12 1987-10-29 Reflektor für zahnärztliche und chirurgische Operationsleuchten Withdrawn EP0268117A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3638669 1986-11-12
DE19863638669 DE3638669A1 (de) 1986-11-12 1986-11-12 Reflektor fuer zahnaerztliche und chirurgische operationsleuchten

Publications (2)

Publication Number Publication Date
EP0268117A2 true EP0268117A2 (de) 1988-05-25
EP0268117A3 EP0268117A3 (de) 1989-12-27

Family

ID=6313800

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87115882A Withdrawn EP0268117A3 (de) 1986-11-12 1987-10-29 Reflektor für zahnärztliche und chirurgische Operationsleuchten

Country Status (3)

Country Link
US (1) US4942507A (pt-PT)
EP (1) EP0268117A3 (pt-PT)
DE (1) DE3638669A1 (pt-PT)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999043980A1 (fr) * 1998-02-27 1999-09-02 Jpm (Societe A Responsabilite Limitee) Dispositif d'eclairage pour champ operatoire du type sans ombre portee
EP0840059A3 (de) * 1996-10-29 1999-09-08 Gebr. Berchtold GmbH & Co. Operationsleuchte

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5625836A (en) * 1990-11-13 1997-04-29 International Business Machines Corporation SIMD/MIMD processing memory element (PME)
RU2047876C1 (ru) * 1993-03-30 1995-11-10 Научно-производственная фирма "МГМ" Устройство для светолучевой обработки
US5515255A (en) * 1994-11-14 1996-05-07 Sterner Lighting Systems Incorporated Lamp reflector
US6752515B2 (en) * 2001-04-16 2004-06-22 Cyberlux Corporation Apparatus and methods for providing emergency lighting
ITMI20120488A1 (it) 2012-03-27 2013-09-28 Fael Spa Riflettori paraellissoidale e biellissoidale asimmetrici rotazionali per impianti di illuminazione.
CN107552416A (zh) * 2017-09-27 2018-01-09 安徽中科光电色选机械有限公司 一种色选机用光源聚光装置

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE502834C (de) * 1928-08-29 1930-07-17 Zeiss Ikon Akt Ges Spiegel fuer eine punktfoermige Lichtquelle
US3191023A (en) * 1963-05-17 1965-06-22 Corning Glass Works Lighting device for dental and surgical procedures
US3511983A (en) * 1967-04-10 1970-05-12 Corning Glass Works Lighting device for dental and surgical procedures
US3588493A (en) * 1968-04-29 1971-06-28 Grimes Manufacturing Co Projecting lamps having reflector which form rectangular patterns of light
DE2446521A1 (de) * 1973-09-29 1975-04-10 Lucas Electrical Co Ltd Lichtkoerperreflektor sowie ein kraftfahrzeuglichtkoerper mit einem solchen reflektor
DE1497308B2 (de) * 1966-12-02 1976-01-29 Koito Manufacturing Co., Ltd., Tokio Reflektor fuer einen fahrzeugbeleuchtungsscheinwerfer
US4149227A (en) * 1977-06-20 1979-04-10 Corning Glass Works Reflector
US4459647A (en) * 1982-04-14 1984-07-10 Koito Kogyo Kabushiki Kaisha Shadow-free lamp assembly

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4308573A (en) * 1978-06-12 1981-12-29 Esquire, Inc. Lamp fixture including diffused low angle reflective surfaces
US4234247A (en) * 1978-10-30 1980-11-18 Corning Glass Works Method of making a reflector
US4242727A (en) * 1979-03-29 1980-12-30 Gte Products Corporation Luminaire reflector
FR2503832B1 (fr) * 1981-04-14 1986-04-04 Cibie Projecteurs Projecteur de vehicule automobile a fenetre de sortie etroite
DE3226580A1 (de) * 1981-12-08 1983-06-16 Robert Bosch Gmbh, 7000 Stuttgart Scheinwerfer fuer kraftfahrzeuge
US4488207A (en) * 1983-08-18 1984-12-11 American Standard Inc. Static multi-color light signal
DE3525041C2 (de) * 1985-07-13 1994-06-16 Bosch Gmbh Robert Abblendlicht-oder Nebellichtscheinwerfer für Kraftfahrzeuge
DE3531223A1 (de) * 1985-08-31 1987-03-05 Bosch Gmbh Robert Scheinwerfer, insbesondere rechteckscheinwerfer, fuer abblendlicht von kraftfahrzeugen
DE3628441C2 (de) * 1986-08-21 1994-02-03 Bosch Gmbh Robert Abblendlichtscheinwerfer für Kraftfahrzeuge

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE502834C (de) * 1928-08-29 1930-07-17 Zeiss Ikon Akt Ges Spiegel fuer eine punktfoermige Lichtquelle
US3191023A (en) * 1963-05-17 1965-06-22 Corning Glass Works Lighting device for dental and surgical procedures
DE1497308B2 (de) * 1966-12-02 1976-01-29 Koito Manufacturing Co., Ltd., Tokio Reflektor fuer einen fahrzeugbeleuchtungsscheinwerfer
US3511983A (en) * 1967-04-10 1970-05-12 Corning Glass Works Lighting device for dental and surgical procedures
US3588493A (en) * 1968-04-29 1971-06-28 Grimes Manufacturing Co Projecting lamps having reflector which form rectangular patterns of light
DE2446521A1 (de) * 1973-09-29 1975-04-10 Lucas Electrical Co Ltd Lichtkoerperreflektor sowie ein kraftfahrzeuglichtkoerper mit einem solchen reflektor
US4149227A (en) * 1977-06-20 1979-04-10 Corning Glass Works Reflector
US4459647A (en) * 1982-04-14 1984-07-10 Koito Kogyo Kabushiki Kaisha Shadow-free lamp assembly

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
LIGHTING PRESEARCH AND TECHNOLOGY, Vol. 11, Nr. 1, 1979 J.G. HOLMES "Para-ellipsoid mirrors and fan shaped beams" Seiten 95-98 *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0840059A3 (de) * 1996-10-29 1999-09-08 Gebr. Berchtold GmbH & Co. Operationsleuchte
US6132067A (en) * 1996-10-29 2000-10-17 Gebrueder Berchtold Gmb & Co. Operating theater lamp for producing a brightly illuminated main light field and a less brightly illuminated outer light field
WO1999043980A1 (fr) * 1998-02-27 1999-09-02 Jpm (Societe A Responsabilite Limitee) Dispositif d'eclairage pour champ operatoire du type sans ombre portee
US6398398B1 (en) 1998-02-27 2002-06-04 Jpm Lighting device for operative site without cast shadow

Also Published As

Publication number Publication date
DE3638669C2 (pt-PT) 1993-08-05
EP0268117A3 (de) 1989-12-27
DE3638669A1 (de) 1988-05-26
US4942507A (en) 1990-07-17

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