WO2001075359A1 - Source del' haute puissance et systeme de distribution optique - Google Patents

Source del' haute puissance et systeme de distribution optique Download PDF

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Publication number
WO2001075359A1
WO2001075359A1 PCT/US2001/004580 US0104580W WO0175359A1 WO 2001075359 A1 WO2001075359 A1 WO 2001075359A1 US 0104580 W US0104580 W US 0104580W WO 0175359 A1 WO0175359 A1 WO 0175359A1
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WO
WIPO (PCT)
Prior art keywords
light
led
substrate
light source
source according
Prior art date
Application number
PCT/US2001/004580
Other languages
English (en)
Inventor
Thomas J. Brukilacchio
Original Assignee
Getinge/Castle, Inc.
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 Getinge/Castle, Inc. filed Critical Getinge/Castle, Inc.
Publication of WO2001075359A1 publication Critical patent/WO2001075359A1/fr

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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
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50—Cooling arrangements
    • F21V29/70—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks
    • F21V29/74—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades
    • 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
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50—Cooling arrangements
    • F21V29/60—Cooling arrangements characterised by the use of a forced flow of gas, e.g. air
    • F21V29/67—Cooling arrangements characterised by the use of a forced flow of gas, e.g. air characterised by the arrangement of fans
    • 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
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50—Cooling arrangements
    • F21V29/70—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks
    • F21V29/74—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades
    • F21V29/76—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades with essentially identical parallel planar fins or blades, e.g. with comb-like cross-section
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B23/00—Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices
    • G02B23/24—Instruments or systems for viewing the inside of hollow bodies, e.g. fibrescopes
    • G02B23/2407—Optical details
    • G02B23/2461—Illumination
    • G02B23/2469—Illumination using optical fibres
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0005—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being of the fibre type
    • G02B6/0006—Coupling light into the fibre
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/42—Coupling light guides with opto-electronic elements
    • G02B6/4201—Packages, e.g. shape, construction, internal or external details
    • G02B6/4204—Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms
    • G02B6/4206—Optical features
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/42—Coupling light guides with opto-electronic elements
    • G02B6/4296—Coupling light guides with opto-electronic elements coupling with sources of high radiant energy, e.g. high power lasers, high temperature light sources
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/42—Coupling light guides with opto-electronic elements
    • G02B6/4298—Coupling light guides with opto-electronic elements coupling with non-coherent light sources and/or radiation detectors, e.g. lamps, incandescent bulbs, scintillation chambers
    • 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
    • F21S8/046—Lighting devices intended for fixed installation intended only for mounting on a ceiling or the like overhead structures having multiple lighting devices, e.g. connected to a common ceiling base
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/20—Electroluminescent [EL] light sources
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/42—Coupling light guides with opto-electronic elements
    • G02B6/4201—Packages, e.g. shape, construction, internal or external details
    • G02B6/4249—Packages, e.g. shape, construction, internal or external details comprising arrays of active devices and fibres
    • 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
    • Y10S362/80—Light emitting diode

Definitions

  • TITLE HIGH POWER LED SOURCE AND OPTICAL DELIVERY SYSTEM
  • This invention generally relates to a light source especially, though not exclusively, intended for use in surgical lighting in operating rooms and ambulatory surgical suites.
  • This invention also relates to a light emitting diode (LED) array which is used in this light source but which may also be useful in other types of optical systems and applications.
  • LED light emitting diode
  • illumination systems for operating rooms have posed major problems.
  • an illumination system provide intense and acceptably uniform illumination over the entire surgical site, which can in some cases, be of substantial width and depth as, for example in open heart surgery.
  • the surgery cannot be interrupted should a bulb burn out, and thus each lighting unit needs either multiple bulbs or at least a back-up bulb which will illuminate should a primary bulb fail.
  • large area systems need at least two, and preferably three or more, lighting units to ensure that light can impinge upon the surgical site from multiple directions so that no part of the surgical site is in complete shadow even when it is necessary for operating room personnel to be positioned between the surgical site and one of the lighting units.
  • the lighting units must also be suspended so that they can be moved and rotated in all directions to provide optimum illumination of the surgical site, the size and shape of which may change during a surgical procedure
  • Lighting units containing multiple high output bulbs sufficiently powerful to produce the intense lighting needed for surgery or to meet code redundancy requirements are necessa ⁇ ly of substantial depth and weight
  • Conventional surgical lighting systems have other disadvantages
  • the powerful lamps used which each typically comp ⁇ se a bulb and a reflector, generate large amounts of heat and infra-red radiation
  • the heat is dissipated into the operating room, thus increasing the load on associated heating, ventilating and air conditioning (HNAC) systems, and is also radiated on to operating room personnel, increasing their fatigue du ⁇ ng lengthy procedures
  • HNAC heating, ventilating and air conditioning
  • the honzontal arm/car ⁇ age/telescopic column/flexible coupling/ hght- head structure desc ⁇ bed m Chaly is of considerable complexity, size and weight, so that the arms, carnages and columns appear to require powered operation (with inevitable problems should any part of the complex mechanical structure fail to operate co ⁇ ectly dunng the course of a surgical procedure), and the whole structure is probably as intrusive in an operating room as conventional lighting heads containing bulbs
  • the fiber bundles in Gehly extend unbroken from adjacent the light sources to the hghtheads, with no apparent provision for relieving stress on the bundles caused by relative movements between the va ⁇ ous parts of the supporting structure
  • the apparatus does not permit completely free rotation of the arms nor more than a limited range of motion of the hghtheads, and even then, wear upon, or damage to the bundles, may be expected after repeated relative movements between the various parts of the supporting structure.
  • the '689 application describes an illumination system, adapted for surgical lighting, which, like the Gehly system, enables the light sources to be placed remotely from an operating room, thereby reducing the bulk of the lighting heads required within the room.
  • the '689 illumination system enables light to be transmitted from the remote sources to the lighting heads using a simpler, less bulky structure which does not require powered operation (though such operation is not excluded), and can provide means for real time control of lighting intensity and CRI.
  • the '689 application also describes an illumination system which enables light from a plurality of sources to be mixed to provide uniform lighting having a desired CCT and/or CRI, and which enables light from a plurality of sources to be mixed to provide uniform lighting having a desired CRI and/or CCT, and which provides for feedback to ensure compliance with CRI or other color standard requirements.
  • the '689 system also provides a fiber based illumination system having at least one termination to a surgical light head which allows for the connection of one or more endoscope illumination or surgical headlamp fiber optic bundles or light guides.
  • the '689 system achieves these advantages by providing two light sources having different spectral distributions, and mixing the light from these two sources in varying proportions to provide light having a desired CCT and/or CRI.
  • the two light sources are an incandescent source, preferably using metal halide lamps, and an LED array, which provides red-biased light.
  • the specific LED anay shown in Figures 6 and 7 of the '689 application is of a generally conventional type, in which a large number of discrete LED's are formed into a close-packed array such that the output surfaces of the LED's lie in a single plane, and a focusing lens focuses the light from the array into a fiber optic bundle.
  • This type of LED anay is certainly capable of producing red-biased light of the intensity (about 5 Watts optical delivered into the aperture of the fiber optic bundle) required by the '689 system.
  • this type of LED anay does have a number of practical disadvantages.
  • the accurate assembly of the 400 or so individual LED's required into the desired planar anay, and the connection of the two conductors from each LED, are tedious, time-consuming and must be conducted manually since they are extremely difficult to automate. Furthermore, it is burdensome to assure accurate alignment of the LED's and formation of a planar anay.
  • an object of the present invention to provide an LED anay which can be substituted for that described in the '689 application and which provides more efficient coupling of the LED output into a fiber optic bundle. It is also an object of the present invention to provide an LED anay with a large numerical aperture.
  • this invention provides a light source compnsmg an LED ananged to emit light through an exit surface, a transparent window secured to the exit surface, and a lens having substantially the form of part of a sphere, this part- sphencal lens being disposed on the opposed side of the window from the LED anay, and the center of curvature of this lens being disposed on or adjacent the LED anay
  • This invention also compnses a high optical power LED comprising a semi-conductor substrate having first and second surfaces on opposed sides thereof and also having light-emission characte ⁇ stics such that flow of cunent from the first to the second surface of the substrate will cause light to be emitted from the substrate emitting surface
  • This LED further compnses at least on pair of electrodes, one of each pair being disposed on the first and the other on the second surface of the substrate, whereby application of a potential difference between the electrodes of each pair causes flow of cunent through the substrate and emission of light from discrete areas of the substrate lying between each of the at least one pair of electrodes, thereby causing the substrate to act as a plurality of hght-emittmg diodes and emit light from its first surface
  • Fig 1 is a block diagram showing schematically the major components and subsystems of an illumination system of the present invention used for surgical lighting,
  • Fig 2 is a diagrammatic perspective view of the components of the illumination system shown m Fig 1 as they appear mside an operating room,
  • Fig 3 is a three quarter view of the halide lamp assembly shown in Fig 1 from m front and to one side
  • Fig 4 is a diagrammatic section through one of the lamps and its associated coupling cell shown in Fig 3,
  • Fig 5 is a diagrammatic section similar to Fig 4 but showing an alternate type of coupling cell
  • Fig 6 is a partially exploded perspective view of the light emitting diode assembly shown in Fig 1 ,
  • Fig 7 is a side elevation view of the LED assembly shown m Fig 6, together with its associated fiber optic bundle, and shows the paths of selected rays traveling from the LEDs to the fiber optic bundle via an intervening imaging system,
  • Fig 8 is an enlarged three-quarter perspective view, from in front and to one side, of part of the LED assembly shown in Fig 6 as actually assembled,
  • Fig 9 is an enlarged three-quarter perspective view, from in front and to one side, of the LED anay shown in Figs 6, 7, and 8 showing individual emitting areas thereof,
  • Figs 10 and 11 are diagrammatic top plan views of alternative LED anays which may be substituted for that shown in Fig 9,
  • Fig 12 shows diagrammatically the components of the light mixer/feedback module and va ⁇ able aperture/shutter module shown in Fig 1 ,
  • Fig 13 shows diagrammatically an alternative anangement of hght mixer/ feedback module and variable aperture/shutter module which can be substituted for that shown in Fig 12, Fig 14 is a cross-section taken along line B-B of Fig 13, Fig 15 is a diagrammatic perspective of an alternative termination to a surgical lighting head of the invention which allows for the connection of one or more surgical head lamps that receive illumination via fiber optic bundles or light guides, and
  • Fig 16 is a diagrammatic perspective of an alternative termination to a surgical light head of the invention which allows for the connection of one or more endoscopes that receive illumination via fiber optic bundles or light guides
  • FIG. 1 illustrates an illumination system including a light source of the present invention
  • This illumination system is used for surgical lighting, but can readily be adapted for other applications in which intense illumination and accurate color rendition are required over a substantial work area or volume
  • the reader is refened to the aforementioned '689 application
  • the illumination system (generally designated 10) is divided into three mam sections, namely a remote section (indicated by the broken rectangle 12), which is preferably located withm a lamp housing located withm an operating room in an easily accessible wall recess or may be installed in a non-aseptic room adjacent, but separate from, the operating room so that it can be accessed by technicians while a surgical procedure is m progress, a canopy section (indicated by the broken rectangle 14), which is installed m a canopy located directly above the ceiling of the operating room, and an operating room section (indicated by the broken rectangle 16), which is installed within the operating room itself Neither the division of the illumination system 10 among the three sections 12, 14 and 16, nor the allocation of particular components and sub-systems to any one of these three sections is essential to the present invention, as will be apparent from the detailed desc ⁇ ption below Numerous changes to this division and allocation can be made without departing from the scope of the invention.
  • the canopy section could be eliminated entirely, and the components thereof removed to the remote section.
  • the illumination system per se is not restricted to the use of an incandescent source and a light emitting diode source, but could, for example, be practiced with two light emitting diode sources, lasers, or laser diodes (LDs), having different spectral characteristics (provided, of course, that adequate attention was paid to the safety regulations governing high powered LED and laser and LD sources).
  • the remote section 12 comprises a lamp assembly 18 containing several metal halide lamps, and a fan 20 which is used to cool the lamp assembly 18.
  • the remote section 12 also comprises a control module 22, which controls the output from the lamp assembly 18 in a manner to be described below, a power supply 24, which supplies power to both the lamp assembly 18 and the control module 22 via lines 26 and 28, respectively, and a status indicator 30, which serves to advise technicians of the status of various components of the system 10. Since operating room personnel may also desire to know the status of the system 10, it may alternatively be desirable to locate the status indicator 30 within the operating room section 16, or at least to duplicate information from the status indicator 30 within the operating room section 16.
  • the output from the lamp assembly 18 is fed via a "halide" fiber opti bundle 32 to a light mixer/feedback module 34 located within the canopy section 14.
  • the light mixer/feedback module 34 also receives the output from a light emitting diode (LED) assembly 36 via an "LED” fiber optic bundle 38.
  • the LED assembly 36 receives power from the power supply 24 via a line 40, and is controlled by control module 22, as indicated by line 42.
  • the output from the light mixer/feedback module 34 is fed to a variable aperture/shutter module 44 and thence via a fiber optic bundle 46 to a light splitter 48 located within the operating room section 16.
  • the light splitter 48 divides the output from the bundle 46 among three separate fiber optic bundles 50A, 50B and 50C, which pass through separate light pipe/joint assemblies 52 to three separate lighting heads 54.
  • the three lighting heads 54 direct separate beams on to a target area 56 disposed within the operating room.
  • one of the lighting heads may be replaced by a fiber cable connector port to feed color controlled light to fiber bundles leading to surgical headlamps and/or endoscopes.
  • the operating room section 16 comprises a vertical cylindrical hub 70, which is mounted on the ceiling of the operating room.
  • Vertical cylindrical sections 72 and 74 are mounted beneath and coaxial with the hub 70, each of these cylindrical sections 72 and 74 carrying a horizontal arm 76 or 78, respectively.
  • the sections 72 and 74 can rotate freely relative to each other and to the hub 70, so that the arms 76 and 78 can extend horizontally in any desired direction from the hub 70.
  • the light splitter 48 is housed within the hub 70 and sections 72 and 74.
  • the single fiber optic bundle 46 (Fig. 1) canies light from the canopy section 14 through the ceiling of the operating room into the hub 70, where the light splitter 48 (Fig. 1) divides this light between separate fiber optic bundles (not shown in Fig. 2) running within the horizontal arms 76 and 78. Since the structures attached to arms 76 and 78 are identical, only that attached to arm 76 will hereinafter be described in detail.
  • the horizontal arm 76 is connected via a fixed (non-articulated) elbow 80 to a vertical section 82, which is coaxial with a lower vertical section 84.
  • the lower section 84 can rotate freely relative to the upper section 82, and is connected via a preferably counterpoised, articulating joint 86 to a "horizontal" arm 88 (obviously, the arm 88 may be inclined away from the horizontal depending upon the position of the joint 86).
  • the cross-sections of vertical section 84 and arm 88 are enlarged adjacent joint 86.
  • the arm 88 is coaxial with a further horizontal arm 90 and may be connected thereto by a joint 92, which is a fully rotatable fiber joint of the present invention and which permits free rotation between the arms 88 and 90.
  • the outer end of the arm 90 is connected to an arcuate tube 94, which supports a lighting head 54. As most easily seen on the left hand side of Fig 2, the arcuate tube 94 is actually connected to a tube 96, which extends radially inwardly into, and supports, the lighting head 54.
  • the operating room section of the illumination system is sufficiently light in weight so that it can readily be manipulated manually by operating room personnel, no power operation being required.
  • a surgical illumination system must produce light with a proper CCT and a proper CRI.
  • metal halide lamps such as those used in the lamp assembly 18 (Fig. 1) are efficient light sources, their output is biased towards the blue end of the visible spectrum.
  • the already inadequate red light intensity provided by these metal halide lamps is further diminished as the light passes through the various fiber optic bundles and light pipes used in the present apparatus, since these bundles and light pipes are formed of plastic materials which tend to selectively absorb red light. Accordingly, it is necessary to mix the light from the metal halide lamps with light which is biased towards the red end of the visible spectrum, and in the present apparatus, such red-biased light is provided by the LED assembly 36.
  • the apparatus must blend these two light sources to produce a completely homogeneous output, since even slight variations in color or intensity of illumination within the target area (i.e., the operating site) are unacceptable in a surgical lighting system.
  • the illumination system desirably provides some means by which the actual light output can be sampled and the proportions of light from the two sources used can be vaned to provide a final light output accurately conforming to the desired CCT and CRI
  • the illumination system desirably allows the intensity of illumination of the target areas to be varied substantially (since, for example, more light may be required for a surgical procedure earned out deep withm a body cavity than for one earned out on the surface of the skin) without significant change in the CCT and CRI of the light
  • Such variation in light intensity should be achievable without changing the power input to the metal halide lamps in the lamp assembly 18, since varying the power input to metal halide lamps results in substantial changes in the spectral characte ⁇ stics of the light output therefrom
  • each of the lamps within the lamp assembly 18 is passed through a variable aperture and then into the input end of fiber optic bundle 32 (See Fig 1) Similarly, light from the LED assembly 36 is introduced into the input end of bundle 38 Withm the light mixer/feedback module 34, the output ends of the fibers of the two bundles 36 and 38 may be randomly intermingled as needed to form a single fiber optic bundle, the output from which is essentially the sum of the inputs to the two bundles
  • the light exiting the combined bundle is received into an optical homogenizer, m the form of a multimode light pipe, which mixes the light to ensure that a truly homogeneous light flux is produced
  • the resultant light flux is sampled to determine if it has the conect CCT and CRI, and if not, the light mixer/feedback module 34 sends a signal to the control module 22 to adjust the LED assembly 36 to vary the proportion of light from this light assembly used to produce the final light flux (Such real-time feedback and
  • Fig. 3 shows a three quarter view of the lamp assembly 18.
  • the lamp assembly 18 comprises six separate metal halide arc lamps (generally designated 110) ananged in a single vertical column, each lamp 110 comprising a bulb 112 and an associated reflector 114.
  • Each reflector 114 is electroformed and provided with a high efficiency dichroic coating which largely rejects (i.e., does not reflect) both ultraviolet and infrared radiation emitted by its associated bulb 112.
  • Each reflector 114 is substantially part ellipsoidal, being shaped to optimize coupling of the light from the associated bulb 112 into a fiber optic bundle 116, formed from a plastic, a separate bundle 116 being provided for each lamp 110.
  • the input end of each bundle 116 is held within a coupling cell 118, which serves to limit heat generated within the bundle by absorption of the radiation from the bulb 112 and to dissipate the heat generated sufficiently quickly to prevent damage to the plastic fibers within the bundle.
  • the coupling cells 118 are provided with cooling fins 120 and the fan 20 (see Fig. 1 - the fan is not visible in Fig.
  • the lamp assembly 18 is disposed within a hollow base portion 122 of the lamp assembly 18 and blows air vertically upwardly over the cooling fins to assist in the dissipation of heat from the coupling cells 118.
  • the lamp assembly 18 is provided with side plates 124 and 126, a rear plate 128 and a front plate (removed from the lamp assembly in Fig. 3 to show the interior details of this assembly). Together these four plates define an elongated rectangular channel within which are disposed the coupling cells 118.
  • each lamp reflector 114 may be equipped with cooling fins to dissipate heat and thus increase lamp life
  • the metal halide lamps 110 and the bundles 116 used in the lamp assembly 18 may be readily available commercial units
  • the lamps 110 can be 3200 lumen Welch Allyn 50 Watt halide lamps (available from Welch Allyn, Lighting Equipment, Skaneateleles, NY or Osram VIP270 metal halide lamps (available from Osram Sylvama, Danvers, MA), while the bundles 116 are conveniently Toray Acrylic Fiber Bundle (available from Toray, Japan)
  • the six separate bundles 116 leaving the coupling cells 118 are combined into the single bundle 32 shown in Fig 1 , which is protected from mechanical damage by a plastic conduit 130 as the bundle 32 runs the substantial distance (typically about 30 feet, approximately 9 meters) from the lamp assembly 18 to the light mixer/feedback module 34 (Fig 1) within the canopy section 14 of the illumination system This distance may vary depending on the separation architecture between the mixer/feedback module 34 and the lighting assemblies
  • Fig 4 is an enlarged view, mostly in section, showing the details of one of the lamps 110 shown in Fig 3 and its coupling cell 118 and associated apparatus It will be seen from Fig 4 that a va ⁇ able aperture 132 may be disposed between the side plate 124 and the coupling cell 118 Such a vanable aperture 132 is controlled by the control module 22 (Fig 1) and serves to regulate the amount of light from the lamp 110 entering the coupling cell 118, thereby varying the proportion of light from the lamps 110 m the final mixed light output in the manner already descnbed
  • the va ⁇ able aperture 132 may also, of course, be used, inter aha, to compensate for changes in the brightness of the lamp 110 as the lamp ages Alternatively, this function may be accomplished electronically
  • the coupling cell 118 compnses a sapphire window 134 which allows light to enter the cell 118, and which is fixed in position withm an axial bore formed withm the hollow metallic cyhndncal body 136 of the cell 118 Sapphire is used to form the window 134 because of its high transmission from the UN through the mid-IR region of the spectrum and its high thermal conductivity It is preferably provided with a dielectric coating that is highly reflective of ultraviolet and infrared radiation from the lamp 110, and thus limits the amounts of unwanted non-visible radiation ente ⁇ ng the cell 118 Having high thermal conductivity, sapphire operates to dissipate heat For this purpose, good thermal contact between the sapphire window 134 and the body 136 is ensured by having the edge of the window 134 metallized and then soldered (the soldenng is not shown in Fig 4) to the body 136 or affixed with conductive silica epoxy
  • the input end of the fiber bundle 116 is secured within a metal ferrule 138, which in turn is soldered or epoxied withm the axial bore of the body 136
  • a layer of adhesive 140 which adheres firmly to both the window and the ferrule, and which is chosen to have as high a thermal conductivity as possible, and to be essentially non- absorptive of the radiation passing through the window 134
  • the cell 118 is designed to allow efficient absorption by the input end of the fiber bundle 116 of the radiation from the lamp 110 without permitting the temperature of this input end to become so high that there is ⁇ sk of damage to the acrylic plastic fibers forming the bundle
  • the window 134 is designed to reject a large proportion of the non-visible radiation which would otherwise be absorbed within the input end of the bundle 116 and generate heat therein
  • the window 134 reduces the amount of heat generated withm the input end of the bundle 116
  • the ferrule 138, the adhesive layer 140 and the window 134 all serve the remove heat rapidly from the input end of the bundle 116, thereby limiting the temperature ⁇ se thereof
  • the cooling fins 120 (which, as shown in Fig 4, have the form of a senes of parallel radial flanges extending outwardly from the cyhndncal body 136), together with the air flow provided by the fan 20 (Fig 1) effect rapid removal of heat from the cell 118
  • the cell 118 enables the high intensity radiation
  • the cell 118' lacks the adhesive layer 140 (Fig 4) of the cell 118 Instead, the intenor of the housing 136' is filled with a heat transfer and absorbing liquid 150, which is typically aqueous
  • the liquid 150 may incorporate color absorbing or fluorescent substances to aid in color conection of the output from the lamp 110, the liquid 150 could also include, for example, infrared dyes to further reduce the amount of infrared radiation reaching the bundle 116' Some non-visible radiation still reaches the input end of the bundle 116', however, and is absorbed there, thus generating heat withm the input end of the bundle
  • the fluid 150 which completely sunounds the input end of the bundle 116', serves to conduct heat away from the input end, thus preventing the temperature of this input end from reaching a level which adversely affects the plastic fibers forming the bundle 116'
  • the housing 136' is provided with ports through which the liquid 150 can be circulated out of the housing 136' and passed through a heat exchanger to cool the
  • the gaps between the individual fibers of the bundle 116' be filled with a material (not shown in Fig. 5), such as a silicone, which is not wetted by the liquid 150.
  • Fig. 6 is an exploded perspective view of the light emitting diode assembly shown in Fig. 1, and should be viewed in conjunction with Fig. 8, which shows the actual assembled form of some of the components shown in Fig. 6.
  • the LED assembly 36 comprises an LED 152 preferably formed as a single, continuous device approximately 2.5 mm square in a manner described below with reference to Fig. 9.
  • the LED assembly 36 further comprises a transparent window 154 which is essentially the same size as, and is bonded directly to the front surface (as seen in Fig. 8) of the LED 152, so that the light leaving the LED 152 passes through the window 154.
  • the window 154 may have a thickness in the range of about 0.1 to 1.0 mm, preferably 0.25 to 0.5 mm, and is desirably formed of a material having a refractive index closely matched (to within about ⁇ 0.2) to that of the wafer of the LED 152 to which it is bonded, so that light from the anay 152 undergoes minimal deviation on passing through the window thereby operating to couple more light out of the wafer in a direction in which it is subsequently more easily managed for downstream use and experiences less total internal reflection (TIR).
  • TIR total internal reflection
  • Arsenic trisulf ⁇ de is the prefened material for forming the window 154.
  • An insulator member 156 formed of a ceramic material has a central square aperture 158 passing therethrough, and (as best seen in Fig. 8) both the anay 152 and the window 154 are accommodated within this aperture 158.
  • the insulator member 156 is metallized, preferably with gold, to provide conductors which electrically contact conductors on the LED anay 152.
  • the assembly 36 further compnses a hemispherical lens 160, the flat surface of which is mounted on the insulator member 156 and centered over the aperture 158 (see Fig 8) so that the center of curvature of the hemisphencal lens substantially coincides with the center of the LED 152
  • the combination of the window 154 and the hemisphencal lens 160 is designed to capture the largest possible fraction of the light leaving the LED 152 Such an anay emits light over one entire hemisphere, and the index-matched window 154 allows substantially all this light to pass through it undeviated, so that this light enters the flat base of the lens 160 and emerges substantially perpendicular to the part-sphencal surface of this lens
  • the fraction of the light emitted by the LED 152 which can emerge perpendicular to the part-sphencal surface of the lens 160 in this manner increases with the radius of the lens, and desirably this radius should be from about 2 to about 6 times the maximum width of the LED 152, further increases in lens diameter beyond this
  • the imaging assembly compnses four separate lens 166, 168, 170 and 172
  • the lens 166, closest to the hemisphencal lens 160 is a concave-convex lens having a concave surface facing the hemisphe ⁇ cal lens 160 This concave surface is part- spherical and is substantially concentnc with the hemisphe ⁇ cal surface of the lens 160 so that light emerging perpendicular to the part-sphencal surface of the lens 160 will also enter the lens 166 substantially perpendicular to its concave surface
  • Fig. 6 also illustrates the components provided for removing heat generated within the LED 152.
  • the components comprise a heat spreading member in the form of a 10 mm square substrate 174 formed of polycrystalline diamond which has a very high thermal conductivity as, for example, that marketed under the trade name of Diamonex by Diamonex, Inc., Allentown, PA.
  • Heat removal device 176 is essentially a metal cuboid with internal microchannels through which cooling fluid is circulated by the two pipes shown in Fig. 6 and elsewhere at 173 and 175. Heat removal device 176 may also be in the form of an appropriately configured thermoelectric cooler.
  • Fig. 9 shows the detailed construction of the LED 152.
  • the LED 152 is not formed by assembling a number of discrete LEDs, but rather is formed by creating at least one pair of electrodes on opposed surfaces of a single, continuous semiconductor substrate 178, which is formed in known manner so that it will emit light when cunent flows from one of its major surfaces to the other. More specifically, the upper surface (in Fig. 9 - this being the surface facing the hemispherical lens 160 shown in Fig.
  • the substrate 178 is metallized (by any of the conventional metallization techniques well-known to those skilled in the semiconductor art) to form thereon a pair of rails 180 extending along one opposed pair of edges of the upper surface, and five elongate conductors 182 extending between these rails 180. From each lateral edge of each of the conductors 182, there extend normally to the conductor, at regularly spaced intervals, ten small projections 184 making for a device with a 10 X 10 anay of emitting areas. It is these projections 184 which serve as the actual electrodes of the LED 152.
  • the undersurface of the wafer 178 is metallized in a similar manner, but without any masking so that it is formed as a continuous electrode.
  • the rails on the two major surfaces of the wafer 178 are connected to an external voltage source, thus establishing a potential difference between the metallized areas on these two surfaces which causes cunent to flow ("injection cunent") between each of the projections 184 and the conesponding electrode on the undersurface of the substrate 178.
  • injection cunent cunent to flow
  • the resultant cunent will not only flow through those parts of the substrate lying directly between the projections but rather, because of the repulsion between like charges, will extend a significant distance beyond the periphery of each projection, the overall shape of the cunent flow resembling a distorted ellipsoid.
  • the electrical power required to provide such a 5 W output does not exceed about 30 W, in contrast to the 150 W needed to provide the same output using a conventional array of discrete LEDs. It will readily be apparent to those skilled in the art of semiconductor fabrication that the number and arrangement of the LED provided on a substrate similar to substrate 178 shown in Fig. 9 can be varied.
  • the total number of emitting areas can vary from a (practical) minimum of 9 or 16 up to several hundred, since appropriate light-emitting semiconductor wafers are commercially available in sizes much larger than the 2.5 mm square size described above. Care must be taken in the design of the metallizations so that each emitting area experiences approximately the same injection cunent within acceptable limits, say within 5% of one another.
  • Figs. 10 and 11 illustrate alternative patterns of metallization which may be substituted for that shown in Fig. 9.
  • the so-called "hour-glass" pattern shown in Fig. 10 closely resembles that shown in Fig. 9, but instead of the conductors 182 being rectangular as in Fig. 9, the conesponding conductors 182' shown in Fig. 10 vary in width, being "necked” to form narcow sections at their intersections with the projections 184'.
  • the circular light-emitting areas may tend to extend beneath the lateral edges of the conductors 182 where these conductors join the projections 184, with the result that the lateral edges of the conductors 182 obscure parts of the light-emitting areas, thus reducing the total light output from the device.
  • the pattern shown in Fig. 10 seeks to avoid this problem by, in effect, removing those portions of the lateral edges of the conductors 182' likely to obscure the light-emitting areas.
  • the pattern shown in Fig. 11 is designed to produce a more uniform areawise output from the LED.
  • the rails elongate conductors 182 shown in Fig. 9 are replaced by a rectangular grid of conductors 186, which leave square apertures therebetween.
  • Cruciform projections 188 extend into these apertures and serve as the electrodes of the LED.
  • These cruciform electrodes 188 produce emission patterns centered on the centers of the square apertures at the centers of the cruciform electrodes, so that the amount of light-emitting area obscured by the electrodes and the conductors 186 is kept to a minimum.
  • the high optical power LED of the present invention may be constructed of various semiconductor material systems comprising well-known layers of doped p and n type materials depending on the desired operating wavelength.
  • the prefened material is GaAlAs and the operating wavelength is 625 nm.
  • the far field illumination pattern being emitted collectively by all of the emitting areas of the LED may be influenced by the spacing between individual emitting areas, their size, and overlapping radiation patterns.
  • Gaussian patterns being emitted by individual emitting areas are ananged to overlap one another.
  • the function of the window 154 can be provided by depositing a layer of material of suitable index of refraction directly on the emitting surface of the LED and then optically polishing that surface. Such a layer may be formed by vapor deposition or the like. In place of the prefened single continuous device, it will evident that an anay of discrete LED's of lower power that have been closely packed and electrically stitched together may be used and then combined with the other elements of the invention in the manner previously described.
  • Fig. 12 shows schematically the components of the light mixer/feedback module and variable aperture/shutter module shown in Fig. 1.
  • the fiber optic bundle 32 (see Figs. 1 and 3) carrying light from the lamp assembly 18 and the fiber optic bundle 38 (see Figs. 1 and 6) carrying light from the LED assembly 36 are combined to form a single bundle 190, in which the individual fibers from the bundles 32 and 164, if required, may be randomly distributed.
  • the combined bundle 190 is joined by means of a butt joint to an optical homogenizer in the form of a multimode light pipe 192 formed from a single rod of transparent plastic material, the length of the light pipe 192 is reduced in Fig 12 for ease of illustration (Those skilled m the art of optical fibers will be aware of various conventional techniques for reducing light losses from butt joints such as that between the bundle 190 and the light pipe 192, for example the provision of a reflective collar sunoundmg the butt joint, accordingly such conventional techniques for reducing light loss from joints will not be further discussed herein )
  • the light pipe 192 intermingles the outputs from the individual fibers in the combined bundle 190 so that the output from the homogenizer is (except for losses withm the fiber optic bundles and at the va ⁇ ous interfaces, the sum of the inputs to the bundles 32 and 164 from the lamp assembly 18 and the LED assembly 36, respectively As previously mentioned, the approp ⁇ ate mixing of the blue-biased light from the lamp assembly 18 with the red-biased light
  • the outputs from metal halide lamps and LED's is sufficiently stable so that once the proper balance between the metal halide lamps and the LED's has been set by adjusting the vanable apertures 132 (Fig 4) or cunent to LEDs, the lighting from the illumination system 10 will maintain a proper CCT and CRI for an extended penod If, however, it is desired to provide a feedback loop to enable real-time adjustment of the balance from the two light sources 18 and 36, this can be achieved using the apparatus shown in Fig 12 As shown in that Figure, the light pipe 192 is provided, near its outlet end, with a pick-off member 194, which is inserted into a small radial bore formed in the light pipe, such that the pick-off member 194 directs a sample of light from the axis of the light pipe 192 into a spectral analyzer 196 The output from this spectral analyzer 196 is fed to a computing unit 198, which calculates the CRI of the light from the spectral data supplied by the
  • the output from the computing unit 198 is fed to a color mixing module 200, which may control (via the control module 42 shown in Fig. 1) the settings of the variable apertures 132 (Fig. 4) of the lamp assembly 18; as previously noted.
  • Control of lamp output by variable apertures in this manner rather than by controlling the power input to the lamps, ensures that the adjustment of lamp output is not accompanied by the spectral changes normally experienced when lamp output is controlled by varying power input. However, cunent to the LEDs may also be varied for this purpose.
  • the output end of the light pipe 192 is disposed adjacent the input end of the fiber optic bundle 46 (cf. Fig. 1) which canies the light from the variable aperture/shutter module 44 to the light splitter 48 disposed within the operating room section of the illumination system 10.
  • a variable aperture 202 is disposed between the light pipe 18 and the bundle 46, this variable aperture 202 being used to control the overall light intensity provided by the illumination system. Typically, the variable aperture 202 is power operated and under the control of the control module 22 (Fig. 1).
  • the bundles 32 and 164 are combined to form a bundle 190'.
  • the fibers from the bundles 32 and 164 are not randomized within the combined bundle 190', and all the necessary homogenization of the light occurs within the light pipe 192; this approach is generally prefened because is greatly simplifies assembly of the bundles 32, 164 and 190'.
  • the combined bundle 190' is joined by means of a butt joint to an optical homogenizer in the form of a multimode light pipe 192'.
  • the light pipe 192 shown in Fig. 12 is normally a simple cylindrical rod
  • the light pipe 192' shown in Fig. 13 has the form of a regular polygonal prism.
  • a polygonal prismatic rather than cylindrical light pipe 192' is also advantageous in secu ⁇ ng uniform dist ⁇ bution of light among the fibers of the bundle 46 which receives the output from light pipe 192'
  • Those skilled in optics are aware that when light passes along a lengthy cyhndncal light pipe, adjacent the output end of the pipe the intensity of the light vanes radially of the pipe The resultant radial variation of light intensity withm the light pipe is undesirable, since it produces a conesponding radial variation m light intensity withm the fibers of the bundle 46, and may produce undesired va ⁇ ations in the light intensity within the area to be illuminated
  • the radial vanation in intensity withm a cyhndncal light pipe 192 may create zones withm bundle 46 receiving less light than others
  • Use of a polygonal pnsmatic light pipe 192' reduces or essentially eliminates any radial va ⁇ ation of light intensity at the output end of the light pipe, thus rende ⁇ ng more uniform the
  • the two approaches to homogenization of light withm the bundles 32, 164 and 190 and the light pipes 192 and 192' desc ⁇ bed above with reference to Figs 12 and 13 respectively are not, of course, mutually exclusive Depending upon the specific apparatus and degree of uniformity of light output desired, one could effect partial or complete randomization of the fibers with the combined bundle 190 and still use a polygonal p ⁇ smatic or similar light pipe 192' to effect further homogenization of the light and avoid the problems associated with a cyhndncal light pipe, as discussed above
  • the apparatus shown in Fig 13 also differs from that shown in Fig 12 in the construction of its feedback anangement
  • the light pipe 192' is provided, near its outlet end, with two pick-off members 194' and 195' Each of these pick-off members 194' and 195' has the form of a cyhndncal rod approximately 1 mm in diameter and terminated at its lower end by a slanting facet cut at 45° to the axi
  • the output from pick-off member 194' falls directly on a detector 199 A, but the output from pick-off member 195' first passes through a filter 197 and then falls on a detector 199B
  • the detector 199A thus receives a sample of all the light passing along the light pipe 192'
  • the filter 197 is ananged to pass only the red portion of the visible spectrum (numerous appropnate filter mate ⁇ als are known to those skilled in the art, the presently prefened mate ⁇ al for the filter 197 being Schott RG610 glass, so that the detector 199B receives only red light passing along light pipe 192', this light o ⁇ ginatmg p ⁇ manly from the LED assembly 36 (Fig 1)
  • the detectors 199A and 199B are photovoltaic detectors, preferably with an active area approximately 5 mm in diameter when using 1 mm diameter pick- off members 194' and 195
  • the output from detector 199A is fed to an amplifier 201 A, with va ⁇ able
  • P L be the lamp power incident on the first detector 199A
  • P D be the LED power incident on each detector (this power is the same for both detectors
  • k be the lamp power incident on the second detector 199B
  • Si and S 2 be the signals from the first and second detectors respectively
  • R be defined as SJS 2
  • r be defined as P L /P D
  • Equation (3) For the present prefened apparatus Welsh Allen lamps and a 10 meter SPD, and the prefened Schott RG610 filter material, k is approximately 0.16, and at this k value, a 1 percent change in R' conesponds to a change in r of less than 2.6 percent. Since experimentally it has been determined that with the Welsh Allen lamp and LED's operating at 632 nm, the system gives satisfactory CCT and CRI if r is held constant to ⁇ 15 percent, the design allows for considerable variation in R while still maintaining satisfactory output. If the SPD's of the two detectors 199A and 199B are not uniform and different from one another, Equation (3) becomes:
  • the apparatus shown in Fig. 13 is not intended for initial calibration of the apparatus, but only for "running adjustment” of the light output as the lamps and LEDs ago, or other factors cause minor changes in light output,
  • the CRI should in theory be calculated in terms of an average color shift of eight standard colors, as discussed above, in practice a simpler calculation, involving measurement of spectral intensity at a smaller number of wavelengths, for example five or six, may often prove sufficiently accurate, and thus the present invention is not limited to using the strict CRI calculation to effect calibration of light output. It will be appreciated that the sampling bandwidth should be sufficiently small to capture any source lines that are prominent enough to contribute significantly to color content.
  • a fiber based surgical lighting system 500 has light heads 502 and 504 that operate in the manner previously described having light delivered to them via the fiber distribution architecture detailed above.
  • System 500 differs from those previously described in that one branch of the fiber distribution system that would usually feed a light head instead terminates in a connector hub 506 that is provided with an articulated arm 508 that has an interface for connecting a fiber bundle 510 that provides light to a surgical head lamp 512.
  • One or more universal mounting adapters can be provided at the distal end of an articulated arm to feed one or more surgical head lamps.
  • Such universal fiber connectors are readily commercially available to interface with commercially available fiber bundles from, for example, Storz, Wolf, ACMI, and Olympus Relative to existing art, this system has the advantage of including improved color rendering and color temperature performance which is consistent with the spectral character of surgical lamps, reduced clutter on the floor relative to rack mounted light sources and reduced fatigue for the surgeon due to the lower weight of the light guide
  • over-the-table surgical lights IEC-601-2-41
  • color temperature and color rendering of surgical head lamps and endoscopes This could result m enors in identification of anatomical features with grave consequences
  • This system would be the first step toward assuring consistent and accurate color identification for illuminated surgical procedures
  • Fig 16 shows a system 600, similar in concept to system 500, except for dehvenng light to one or more endoscopes
  • system 600 has light heads 602 and 604 and a connecting hub 606 carrying standard connectors for receiving fiber bundles 608 and 610 that feed endoscopes 612 and 614, respectively
  • systems 500 and 600 can be readily adapted to interface with head lamps and/or endoscopes and that one or more connecting ports having articulated arms or not may be used
  • the present invention provides a light source, and an LED for use in such a light source, which greatly simply the assembly of the LED as compared with the assembly of conventional LED from numerous discrete LED's
  • the light source of the present invention can generate a high light output using less power than pnor art LED anays, thus simplifying the problem of cooling the anay
  • the LED of the present invention can readily be fabncated by conventional semiconductor fab ⁇ cation techniques in an economical manner

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Astronomy & Astrophysics (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

L'invention concerne une source de lumière à haute puissance optique comprenant une DEL (152) servant à émettre de la lumière à travers une surface de sortie, une fenêtre (154) transparente fixée à ladite surface et une lentille hémisphérique (160) du côté opposé de la fenêtre à partir de la surface de sortie, ladite lentille hémisphérique étant centrée sur les diodes électroluminescentes. Dans un mode de réalisation préféré, la DEL se présente sous la forme d'un dispositif semi-conducteur continu simple, comportant, sur les deux côtés, des conducteurs structurés qui définissent au moins une paire d'électrodes, de sorte que lorsqu'une différence de potentiel est appliquée aux bornes de ces paires, le flux de courant qui passe à travers le substrat produit une émission de lumière dans des multiples zones du substrat, sensiblement perpendiculaire à celui-ci, faisant agir le substrat en tant que DEL. La lumière provenant de cette source peut être focalisée par un système de lentilles auxiliaires (162) dans une fibre optique (164) avec un rendement de couplage très élevé.
PCT/US2001/004580 2000-04-03 2001-02-13 Source del' haute puissance et systeme de distribution optique WO2001075359A1 (fr)

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DE102007063262A1 (de) * 2007-12-17 2009-06-18 Storz Endoskop Produktions Gmbh Beleuchtungsvorrichtung zum Erzeugen von Licht und zum Einkoppeln des Lichts in ein proximales Ende eines Lichtleitkabels einer Beobachtungsvorrichtung für die Endoskopie oder Mikroskopie
US7584534B2 (en) 2005-01-10 2009-09-08 Perceptron, Inc. Remote inspection device
EP2374401A1 (fr) * 2010-03-29 2011-10-12 Karl Storz GmbH & Co. KG Dispositif de sources de lumière pour applications endoscopiques et exoscopiques
US8378322B2 (en) 2010-01-27 2013-02-19 Fusion Uv Systems Micro-channel-cooled high heat load light emitting device
CN104905783A (zh) * 2014-03-11 2015-09-16 韦伯斯特生物官能(以色列)有限公司 在用作导管的光纤电缆上的多个led传感器
CN109031544A (zh) * 2018-08-01 2018-12-18 苏州汇影光学技术有限公司 一种大功率led光纤耦合系统

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US7584534B2 (en) 2005-01-10 2009-09-08 Perceptron, Inc. Remote inspection device
US8218074B2 (en) 2005-01-10 2012-07-10 Perceptron, Inc. Remote inspection device
DE102007063262A1 (de) * 2007-12-17 2009-06-18 Storz Endoskop Produktions Gmbh Beleuchtungsvorrichtung zum Erzeugen von Licht und zum Einkoppeln des Lichts in ein proximales Ende eines Lichtleitkabels einer Beobachtungsvorrichtung für die Endoskopie oder Mikroskopie
EP2074935A1 (fr) 2007-12-17 2009-07-01 Storz Endoskop Produktions GmbH Dispositif d'éclairage destiné à produire de la lumière pour l'endoscopie ou la microscopie
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US9072454B2 (en) 2010-03-29 2015-07-07 Karl Storz Gmbh & Co. Kg Light source device for endoscopic or exoscopic applications
CN104905783A (zh) * 2014-03-11 2015-09-16 韦伯斯特生物官能(以色列)有限公司 在用作导管的光纤电缆上的多个led传感器
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US10182733B2 (en) 2014-03-11 2019-01-22 Biosense Webster (Israel) Ltd. Multiple LED sensors on a fiberoptic cable used as a catheter
CN109031544A (zh) * 2018-08-01 2018-12-18 苏州汇影光学技术有限公司 一种大功率led光纤耦合系统

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