EP0391287B1 - Lampe chirurgicale - Google Patents

Lampe chirurgicale Download PDF

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Publication number
EP0391287B1
EP0391287B1 EP90106228A EP90106228A EP0391287B1 EP 0391287 B1 EP0391287 B1 EP 0391287B1 EP 90106228 A EP90106228 A EP 90106228A EP 90106228 A EP90106228 A EP 90106228A EP 0391287 B1 EP0391287 B1 EP 0391287B1
Authority
EP
European Patent Office
Prior art keywords
reflector
fresnel lens
light according
operating light
prisms
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 - Lifetime
Application number
EP90106228A
Other languages
German (de)
English (en)
Other versions
EP0391287A1 (fr
Inventor
Peter Enders
Jörg Hartge
Ingo Dr. Jaeckel
Reinhard Dr. Luger
Géza Ambrus
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.)
Heraeus Medical GmbH
Original Assignee
Heraeus Medical 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
Priority claimed from DE8903955U external-priority patent/DE8903955U1/de
Priority claimed from DE8903957U external-priority patent/DE8903957U1/de
Application filed by Heraeus Medical GmbH filed Critical Heraeus Medical GmbH
Publication of EP0391287A1 publication Critical patent/EP0391287A1/fr
Application granted granted Critical
Publication of EP0391287B1 publication Critical patent/EP0391287B1/fr
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
    • F21V5/02—Refractors for light sources of prismatic shape
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S8/00—Lighting devices intended for fixed installation
    • F21S8/04—Lighting devices intended for fixed installation intended only for mounting on a ceiling or the like overhead structures
    • F21S8/043—Lighting devices intended for fixed installation intended only for mounting on a ceiling or the like overhead structures mounted by means of a rigid support, e.g. bracket or arm
    • 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
    • F21V14/00—Controlling the distribution of the light emitted by adjustment of elements
    • F21V14/06—Controlling the distribution of the light emitted by adjustment of elements by movement of refractors
    • 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
    • F21V3/00—Globes; Bowls; Cover glasses
    • F21V3/02—Globes; Bowls; Cover glasses characterised by the shape
    • 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
    • F21V5/045—Refractors for light sources of lens shape the lens having discontinuous faces, e.g. Fresnel lenses
    • 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
    • F21V7/0025—Combination of two or more reflectors for a single light source
    • 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
    • F21V7/22—Reflectors for light sources characterised by materials, surface treatments or coatings, e.g. dichroic reflectors
    • F21V7/28—Reflectors for light sources characterised by materials, surface treatments or coatings, e.g. dichroic reflectors characterised by coatings
    • 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
    • F21V21/00—Supporting, suspending, or attaching arrangements for lighting devices; Hand grips
    • F21V21/14—Adjustable mountings
    • F21V21/26—Pivoted arms
    • F21V21/28—Pivoted arms adjustable in more than one plane
    • 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
    • F21V7/0008—Reflectors for light sources providing for indirect lighting
    • 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
    • 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

Definitions

  • the present invention relates to an operating light with one or more headlights, each with a light source, which is shielded in the radiation direction by a counter-reflector such that the luminous flux is concentrated by a reflector on an optical system that closes the housing in the radiation direction.
  • US Pat. No. 3,255,342 describes a single headlight in a multi-eye surgical light in which the direct irradiation of the lamp is prevented by a mirrored tip of the lamp. All radiation from the lamp is directed into a cold light reflector. A large part of the infrared radiation passes through the reflector and the visible light is focused on an optical system that closes the housing of the luminaire in the direction of radiation.
  • This optical system consists of several disks or layers, of which one disk or layer also reflects or absorbs infrared. These panes or layers make the operating light heavy and the non-derived ones Heat rays heat up the surgical light during long periods of operation. Even the infrared reflecting panes absorb heat over long periods of operation and then radiate it themselves.
  • FR-PS 967 964 an operating light with a Fresnel lens is known, which contains only a catadioptric area and has an adjustable light source.
  • the object of the invention is to develop a surgical light of the type mentioned in such a way that an approximately homogeneous illumination of a deep surgical wound is ensured.
  • the optical system contains a Fresnel lens made of ring prisms with a dioptric central area and a catadioptric edge area, and in that the ring prisms are designed in such a way that the light bundles emerging from the Fresnel lens form the optical axis cut at a greater distance from the Fresnel lens, the smaller the distance at which the light beams exit the Fresnel lens from the optical axis and that the reflector is a flat hyperboloid, the reflective layer of which is applied to a vitreous body, the layer the visible light is largely reflected on the reflector and the infrared radiation is largely transmitted.
  • the advantages of the invention lie in particular in that the focal points of the different from the light beam generated by the Fresnel lens are located at different distances from the Fresnel lens.
  • the light bundles generated by the light source or sources and the Fresnel lens are directed in such a way that an approximately parallel light cone results in a large distance range from the Fresnel lens, the light distribution in the area of the surgical wound remaining approximately homogeneous even at different working distances. This ensures good shade, depth shadow and deep illumination of the wound cavity even over a large working depth.
  • the homogeneous light distribution is also crucial for a constant shadow generation across the work area, which is essential for the surgeon's work to enable plastic vision even in a wound cavity and thus to estimate the smallest distances.
  • the reflector is preferably designed as a flat hyperboloid in order to achieve an extremely flat construction.
  • the reflective layer is preferably applied to a vitreous body and is designed such that it largely reflects visible light, while largely permitting infrared radiation. As a result, only the visible light is emitted onto the Fresnel lens, the infrared radiation is eliminated from the operating area of the surgical light.
  • its reflective layer is preferably applied thicker at the edge of the reflector than at the reflector apex.
  • the Fresnel lens according to the invention can be injection molded or cast from acrylic glass or similar material. Details of this new lens system can be found in the subclaims.
  • Another embodiment of the invention is achieved by controllable mobility of the hyperboloid reflector unit relative to the Fresnel lens system.
  • An advantageous focusability of the headlights is hereby achieved.
  • there is a homogenization of the illuminated field if, for example, two, three or more individual headlights of an operating light are defocused simultaneously and by the same amount.
  • the light bundles formed by the dioptric and the catadioptric lens portion of the Fresnel lens then migrate by equal amounts from or to the optical axis, which either results in a uniform widening of the light field or narrowing.
  • the great advantage obtained by the lens system according to the invention is that with each set size of the illuminated operating field, a homogeneous light distribution is obtained even in deeper areas of the wound cavity.
  • the operating light has a good depth of field without the position of the operating light being corrected as the operation progresses needs to be.
  • the Fresnel lens is particularly preferably constructed from a continuous base plate which has ring-shaped prisms in the edge region, the tip rings and flanks of which point towards the reflector and form the catadioptric lens region.
  • the base plate also has ring-shaped prisms in the central area, the tips of which are also directed towards the reflector.
  • a second Fresnel lens is inserted above the base plate, the ring prisms of which are directed away from the reflector and which forms the dioptric lens area with the oppositely directed ring prisms of the continuous base plate and an air gap enclosed between them.
  • the height of the tip rings of the ring-shaped prisms of the catadioptric edge area decreases with increasing distance from the optical central axis.
  • the flanks of these ring prisms inclined to the optical axis become steeper with increasing distance from the optical center axis, while the flanks of these ring prisms which are inclined radially outward are flatter with increasing distance from the optical center axis.
  • the light-refractive flanks of the lamp-side and light-exit-side ring prisms face each other.
  • the light-refractive flanks rise more to the horizontal than they fall off on the light exit side.
  • the refractive flanks of the ring prisms of the central area of the Fresnel lens form with increasing distance to the optical center axis an increasing angle to the horizontal.
  • This dimensioning of the ring prisms ensures that the center beams of the light beams emanating from the Fresnel lens intersect at different distances from the Fresnel lens with the optical axis and form corresponding focus points, as a result of which the light distribution remains approximately homogeneous over a larger distance range.
  • the lamp, the counter-reflector and the reflector particularly preferably form a structural unit which is arranged so as to be movable relative to the Fresnel lens rigidly connected to the housing. A movement of this assembly relative to the Fresnel lens results in an enlargement of the light field, so that the surgeon can homogeneously illuminate an enlarged operation field with a corresponding movement.
  • an operating light 10 is suspended individually above an operating table 12 by means of a ceiling fastening 14, as shown, or in combination with other identical or larger or smaller operating lights.
  • the suspension forms a hinge 16, around the axis of which the lamp 10 can be pivoted by at least 360 °.
  • the suspension of the lamp consists in a manner known per se of several arms which are connected to one another by means of joints. So close to the joint 16 an arm 18 and to this via a double joint 20 an arm 22 pivotable about its longitudinal axis, which carries a body 26 of the operating light 10 via an axis 24.
  • the body 26 is kept very flat compared to conventional operating lights with its small extension 28.
  • the body 26 has a lower end 32 in which the light exits from individual headlights 25 are located in a surface which is curved in the manner of a spherical segment.
  • An operating light of the type described here can have one to seven individual headlights 25, as will be described in more detail below with reference to FIG. 2.
  • each individual headlight 25 is from the top, i.e. accessible from the side opposite to the light emitting side of the body 26 after removal of a removable cap 30, which considerably simplifies the replacement of light sources 50, the execution of maintenance, cleaning, adjustment, etc.
  • each individual headlight 25 has a closed underside 34 which carries a Fresnel lens 60 described in more detail below in a rigid frame 35.
  • a connection is made to a carrier 38, which merges into a collar-shaped opening 40, in which a reflector system 42 with a light source can move.
  • the reflector system 42 consists of a carrier 44, in the center of which there is an adjustable holder 46 for a light source 50, preferably a halogen lamp.
  • the socket 46 can be removed from the carrier 44 for replacement with the light source 50.
  • Flexible electrical connections 48 are led out of the socket 46.
  • the total radiation emanating from the light source 50 is prevented by a counter-reflector 52 from emitting directly in the direction of the cover plate designed as a Fresnel lens 60 and is reflected.
  • a main reflector 54 consists of glass and is a hyperboloid in the illustrated embodiment.
  • a hyperboloid reflector has the advantage of being low and is easy to manufacture from glass.
  • the diameter of the reflector 54 is smaller than the light exit area of the Fresnel lens 60. Since the amount of light is nevertheless collected via the smaller reflector 54, there is a high level of illumination in the operating field, which is desirable and advantageous.
  • a reflection layer 53 which is largely transparent to infrared, is applied, which, as described in more detail below, throws the visible radiation onto the Fresnel lens 60.
  • the thickness of the reflection layer 53 increases toward the edge of the reflector 54.
  • the radiation generated by a helix 66 in the light source 50 can first be filtered in the shell or wall of the light source 50. Since a halogen lamp 50 nevertheless emits a high component of infrared radiation, which either radiates directly from the filament 66 onto the reflector 54 like a beam 68, or strikes the reflector 54 via the counter reflector 52, the reflection layer 53 is as one Conversion filter designed. While rays 68 are largely (about 70%) directed as visible light rays 70 in the direction of the Fresnel lens 60, infrared rays 72 pass through and are diffusely distributed on the back of the reflector 54 by a layer 57.
  • This diffuse distribution of the infrared rays 72 passing through on the entire rear side of the reflector 54 has the effect that the heat rays do not bundle hit any components in the body 26 and heat them up, but instead cause an arbitrary scattering which is distributed everywhere.
  • In the middle of the reflector 54 there is an opening 59 through which not only the lamp 50 is socketed but also infrared rays are removed from the reflector system 42.
  • a further measure for filtering out the undesired heat radiation and for generating cold light with an operating field is the arrangement of a filter disk 56 (FIG. 2) at the lower edge of the reflector 54.
  • a filter disk 56 (FIG. 2) at the lower edge of the reflector 54.
  • it is an annular disk that has only its radially outer edge rests and no mechanical connection to the hot center from the light source 50 and counter reflector 52 needed. This prevents heat from being heated by the flow of heat.
  • the incident infrared radiation is reflected back upwards at an angle which is essentially directed towards the opening 59.
  • the largest optically active diameter of the Fresnel lens 60 is 190 mm and the diameter of the reflector 54 in the optically active region is approximately 120 mm.
  • the distance from the lower edge of the reflector 54 to the central plane of the Fresnel lens 60 is now 37.7 mm.
  • the largest optically effective diameter of the Fresnel lens 60 is approximately 250 mm and the optically largest diameter of the reflector is approximately 120 mm.
  • the distance from the lower edge of the reflector 54 to the central plane of the Fresnel lens 60 is 70 mm.
  • the same reflector unit with approx. 120 mm reflector outlet opening and an apex height of only approx. 20 mm can therefore be used for individual spotlights of different sizes, which lowers the production costs.
  • the circular Fresnel lens 60 forming the light exit is larger in diameter than the reflector 54 and consists of a dioptric central area and an annular catadioptric edge area, which is best seen in FIG. 5.
  • the lower part of the Fresnel lens 60 on the light exit side consists of a part 61 which is continuous over the entire diameter and which represents the sole catadioptric lens system in the edge area 62, while in the central area 64 a further Fresnel lens 63 is used for achromatization.
  • the light rays incident there from the reflector 54 are deflected by a series of ring-shaped prisms 65 (FIG. 3).
  • the flank slopes ⁇ , ⁇ and the heights H of the ring prisms of the Fresnel lens 60 are selected such that an approximately homogeneous illuminance distribution is achieved in the operating field even over a predetermined depth range, as will be explained in more detail with reference to FIG. 4.
  • rays 68 are deflected by reflector 54 into rays 70 so that they strike inclined surfaces 96 of prism rings 65 and are broken into the material of Fresnel lens 60.
  • the refracted beam 100 extends to the rear wall of the oppositely inclined prism surface 98 and is totally reflected there, so that these light beams 102 initially continue in the material of the Fresnel lens 60 and finally emerge as beams 104 in the direction of the operating field.
  • rays 84 are deflected from any point on the reflector 54 in the direction of the ray 86 onto an inclined surface 96 of the prism rings 65.
  • the outwardly inclined flanks 96 of the catadioptric ring prisms 65 become steeper with increasing distance from the optical axis 67, the corresponding flank slope ⁇ thus increases towards the edge of the Fresnel lens 60.
  • the upper edges of the ring prisms 65 become lower towards the edge of the Fresnel lens 60, the height H of the ring prisms 65 decreases accordingly towards the edge, so that all radiation occurring in this catadioptric edge region despite the low overall height, i.e. the small distance 69 from the reflector 54 to the Fresnel lens 60, and the different diameter into the Fresnel lens 60 is broken.
  • flanks 98 of the catadioptric ring prisms 65 which are oriented toward the optical axis 67 and on which total reflection takes place, become relatively flatter with increasing distance from the optical axis 67, the corresponding flank slope ⁇ thus decreases towards the edge. In this way, the headlight from the catadioptric region 62 of the Fresnel lens 60 achieves a desired beam path, as will be explained in more detail with reference to FIGS. 4, 5 and 6.
  • flanks 92 of the ring prisms 61 ′ of the continuous Fresnel disk 61 which are executed for the light source 50.
  • the inclination of opposing flanks 90 and 92 to the horizontal is so different in each case that the radiation 94 from the dioptric central region 64 occurs almost axially parallel to the optical axis 67 of the Fresnel lens 60, cf. 4, in particular, the flanks 92 of the continuous Fresnel disk 61 which are inclined upward towards the optical axis have an increasing gradient with increasing distance from the optical axis 67.
  • the flanks 90 of the ring prisms 63 ′ of the Fresnel disk 63 directed downward to the optical axis 67 have an increasing gradient with increasing distance from the optical axis 67.
  • the special design of the ring prisms 65 and 63 ', 61' and the selected flank slopes ⁇ , ⁇ cause the light beam emerging from the Fresnel lens 60 to intersect the optical axis 67 at a greater distance a, the smaller the distance b is with which the light bundles exit from the Fresnel lens 60 away from the optical axis 67.
  • the light bundles emerging at the edge of the Fresnel lens 60 are refracted the most towards the optical axis and intersect the optical axis 67 at a distance a1.
  • the illustrated central bundle emerges from the Fresnel lens 60 at a distance b2 from the optical axis and intersects the optical axis at a2.
  • the light beam emerging relatively close to the optical axis 67 at a distance b3 from the dioptric region of the Fresnel lens 60 has one External beam, which runs almost parallel to the optical axis, the center beam intersects the optical axis 67 at a large distance a3 from the Fresnel lens 60.
  • the distances a1, a2, a3 indicate the intersection of the respective center beam of the light bundle in question with the optical axis 67.
  • FIG. 5 schematically shows the homogeneity in the illuminated operating field 114 that can be achieved by the Fresnel lens 60 with its catadioptric area 62 and dioptric area 64 for an ideal case of the exact focusing of the lamp 50 in the optical system.
  • the entire radiation generation and reflector system 42 is now movable relative to the fixed Fresnel lens 60, which is indicated in FIG. 2 by a movement gap 122 and in FIG. 6 by a deflection 120 of the lamp 50.
  • a change in distance from the fixed Fresnel lens system 60 means a spreading or narrowing of the illuminated field.
  • the Fresnel lens 60 becomes a honeycomb structure as a diffusion layer awarded, as is clear from the enlarged detail view from FIG. 3 in FIG. 6.
  • the plan view of a section 122 is in the direction of the arrow 124.
  • a scale which is greatly enlarged compared to FIG. 3 is used. While the diameter of the individual spotlight is approximately 20 to 30 mm, the cutout in FIGS. 6 and 7 only shows a width of approximately 2.6 cm.
  • the scattering structure is small compared to the ring prisms 65, 90, 92 of the Fresnel lens 60 and that the structure boundaries of the scattering structure cross the structure lines of the lens glass as far as possible.
  • the scattering structure consists of polygons 128. Hexagons which are arranged with their edges 130 close to one another in rectilinearly aligned, perpendicularly intersecting axes 132, 134 are preferably provided. It is a very small-scale structure (polygonal diameter, for example 7.36 to 8.5 mm), compared to the diameter of the Fresnel lens 60.
  • FIG. 7 shows a section through the scattering structure shown in FIG. 6 along the section axes 3 '- 3'.
  • the individual hexagons have a bulge 138 towards the center 136, as a result of which an obtuse angle is formed on the hexagon edges 130.
  • the depth of deflection is of the order of 0.1 mm.
  • the bulge has a bulge radius of 60 mm over the middle 136. All dimensions given in the drawing of FIGS. 6 and 7 are mm dimensions.
  • the field size can be regulated with other measures.
  • the new honeycomb structure also significantly improves contrast formation. According to DIN 20 35, the shade has been determined to be greater than 50% and the tefee shade to be greater than 30%.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Eye Examination Apparatus (AREA)
  • Dry Shavers And Clippers (AREA)
  • Endoscopes (AREA)
  • Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)

Claims (17)

  1. Luminaire chirurgical (10) comportant un ou plusieurs projecteurs (25) comprenant chacun une source de lumière (50) à laquelle, dans la direction du rayonnement, un contre-réflecteur (52) fait écran de façon telle que le flux lumineux est concentré par un réflecteur (54) sur un système optique qui obture le boîtier dans la direction du rayonnement, caractérisé par le fait le système optique contient une lentille de Fresnel (60) constituée de prismes annulaires (65 ; 90, 92) présentant une zone centrale dioptrique (64) et une zone de bordure catadioptrique (62) et que les prismes annulaires (65 ; 90, 92) sont réalisés de façon telle que les faisceaux lumineux sortant de la lentille de Fresnel (60) intersectent l'axe optique (67) à une distance (a) de la lentille de Fresnel (60) d'autant plus grande qu'est plus petite la distance (b) dont sont éloignés de l'axe optique (67), sur la lentille de Fresnel (60), les faisceaux lumineux qui en sortent et que le réflecteur (54) est un hyperboloïde plat dont la couche réfléchissante (53) est appliquée sur un élément de verre, la couche (53) qui se trouve sur le réflecteur (54) réfléchissant largement la lumière visible et laissant largement passer le rayonnement infrarouge.
  2. Luminaire chirurgical selon la revendication 1, caractérisé par le fait que la couche réfléchissante (53) du réflecteur (54) est plus épaisse en bordure du réflecteur qu'au sommet du réflecteur.
  3. Luminaire chirurgical selon l'une des revendications 1 ou 2, caractérisé par le fait que le diamètre du réflecteur (54) est inférieur au diamètre de la lentille de Fresnel (60).
  4. Luminaire chirurgical selon l'une des revendications précédentes, caractérisé par le fait que la couche (53) qui réfléchit la lumière est appliquée sur la face intérieure, tandis que sur la face extérieure se trouve une surface (57) qui diffuse le rayonnement infrarouge qui la traverse.
  5. Luminaire chirurgical selon l'une des revendications précédentes, caractérisé par le fait qu'un disque annulaire filtrant (56) s'étend, depuis le bord du réflecteur (54), radialement vers l'intérieur dans le plan de sortie du réflecteur.
  6. Luminaire chirurgical selon l'une des revendications précédentes, caractérisé par le fait que la lentille de Fresnel (60) est constituée d'un disque de base (61) ininterrompu, qui contient, dans la zone de bordure catadioptrique, des prismes annulaires (65) présentant une section triangulaire relativement grande et des flancs (96, 98) orientés vers le réflecteur (54) et, dans la zone médiane, des prismes annulaires (61') présentant une section triangulaire relativement petite et des flancs (91, 92) orientés vers le réflecteur (54), que dans la zone centrale est disposée une seconde lentille de Fresnel (63) qui contient des prismes annulaires (63') présentant une section triangulaire relativement petite et des flancs (90, 90') orientés du côté opposé au réflecteur (54), que les prismes annulaires (63') de la seconde lentille de Fresnel (63) sont situés en face des prismes annulaires (61') du disque de base ininterrompu (61) et que la seconde lentille de Fresnel (63), avec le disque de base ininterrompu (61) et une fente remplie d'air (93) enfermée entre eux, forme la zone centrale dioptrique de la lentille de Fresnel (60).
  7. Luminaire chirurgical selon l'une des revendications précédentes, caractérisé par le fait que les arêtes annulaires supérieures des primes annulaires (65) de la lentille catadioptrique (62) sont graduellement de moindre hauteur pour une distance croissante d'avec l'axe optique (67).
  8. Luminaire chirurgical selon l'une des revendications précédentes, caractérisé par le fait que les flancs (96), inclinés vers l'axe optique, des prismes annulaires (65) de la lentille catadioptrique (62) sont disposés en pente plus raide pour une distance croissante d'avec l'axe optique (67), tandis que les flancs (98), inclinés radialement vers l'extérieur, des prismes annulaires (65) sont inclinés en pente moins raide pour une distance croissante d'avec l'axe optique (67).
  9. Luminaire chirurgical selon l'une des revendications précédentes, caractérisé par le fait que les flancs (90, 92), qui réfractent la lumière dans la fente remplie d'air (93) de la lentille dioptrique (64), des prismes annulaires sont situés l'un en face de l'autre, ceux (90) qui sont du côté de l'ampoule ayant sur l'horizontale une pente montante supérieure à la pente descendantes de ceux (92) qui sont du côté de la sortie de la lumière.
  10. Luminaire chirurgical selon l'une des revendications précédentes, caractérisé par le fait que les flancs (90, 92) des prismes annulaires qui réfractent la lumière font avec l'horizontale un angle croissant pour une distance croissante d'avec l'axe optique (67).
  11. Luminaire chirurgical selon l'une des revendications précédentes, caractérisé par le fait que l'ampoule (50), le contre-réflecteur (52) et le réflecteur (54) forment un ensemble (42) qui est disposé mobile par rapport à la lentille de Fresnel (60) rigidement reliée au boîtier (26).
  12. Luminaire chirurgical selon l'une des revendications précédentes, caractérisé par le fait que le déplacement de l'ensemble (42) contenant dans un boîtier (26) plusieurs projecteurs individuels (25) couplés l'un avec l'autre se fait en restant symétrique par rapport à l'axe (67).
  13. Luminaire chirurgical selon l'une des revendications précédentes, caractérisé par le fait que chaque projecteur individuel (25) est recouvert d'un capot amovible (30) du côté opposé au côté du boîtier (26) où se fait le rayonnement lumineux.
  14. Luminaire chirurgical selon l'une des revendications précédentes, caractérisé par le fait que la lentille de Fresnel (60) présente une structure diffusante supplémentaire.
  15. Luminaire chirurgical selon la revendication 14, caractérisé par le fait que la structure diffusante est constituée de polygones (28) qui présentent, en leur milieu (36), un bombement (38).
  16. Luminaire chirurgical selon la revendication 15, caractérisé par le fait qu'en ce qui concerne les polygones (28), il s'agit d'hexagones qui sont disposés, côte à côte, sur des axes (32, 34) alignés en ligne droite.
  17. Luminaire chirurgical selon l'une des revendications 14 à 16, caractérisé par le fait que la structure diffusante est disposée sur la surface de la lentille de Fresnel (60) située du côté opposé à la source de lumière.
EP90106228A 1989-03-31 1990-03-31 Lampe chirurgicale Expired - Lifetime EP0391287B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE8903955U 1989-03-31
DE8903957U 1989-03-31
DE8903955U DE8903955U1 (de) 1989-03-31 1989-03-31 Scheinwerfer, insbesondere für Operationsleuchte
DE8903957U DE8903957U1 (de) 1989-03-31 1989-03-31 Operationsleuchte

Publications (2)

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EP0391287A1 EP0391287A1 (fr) 1990-10-10
EP0391287B1 true EP0391287B1 (fr) 1996-05-22

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US (1) US5128848A (fr)
EP (1) EP0391287B1 (fr)
JP (1) JPH0332662A (fr)
AT (1) ATE138460T1 (fr)
DE (1) DE59010332D1 (fr)
DK (1) DK0391287T3 (fr)
ES (1) ES2087095T3 (fr)
GR (1) GR3020262T3 (fr)

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Also Published As

Publication number Publication date
ATE138460T1 (de) 1996-06-15
GR3020262T3 (en) 1996-09-30
EP0391287A1 (fr) 1990-10-10
DE59010332D1 (de) 1996-06-27
JPH0332662A (ja) 1991-02-13
US5128848A (en) 1992-07-07
ES2087095T3 (es) 1996-07-16
DK0391287T3 (da) 1996-08-26

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