WO2009146751A1 - Passage de conducteur avec profil de feuille curviligne - Google Patents

Passage de conducteur avec profil de feuille curviligne Download PDF

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Publication number
WO2009146751A1
WO2009146751A1 PCT/EP2008/057080 EP2008057080W WO2009146751A1 WO 2009146751 A1 WO2009146751 A1 WO 2009146751A1 EP 2008057080 W EP2008057080 W EP 2008057080W WO 2009146751 A1 WO2009146751 A1 WO 2009146751A1
Authority
WO
WIPO (PCT)
Prior art keywords
film
lamp according
cross
lamp
sectional profile
Prior art date
Application number
PCT/EP2008/057080
Other languages
German (de)
English (en)
Inventor
Matthias Morkel
Original Assignee
Osram Gesellschaft mit beschränkter Haftung
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 Osram Gesellschaft mit beschränkter Haftung filed Critical Osram Gesellschaft mit beschränkter Haftung
Priority to PCT/EP2008/057080 priority Critical patent/WO2009146751A1/fr
Priority to TW098118479A priority patent/TW201007808A/zh
Publication of WO2009146751A1 publication Critical patent/WO2009146751A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/36—Seals between parts of vessels; Seals for leading-in conductors; Leading-in conductors
    • H01J61/366—Seals for leading-in conductors
    • H01J61/368—Pinched seals or analogous seals
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/84—Lamps with discharge constricted by high pressure
    • H01J61/86—Lamps with discharge constricted by high pressure with discharge additionally constricted by close spacing of electrodes, e.g. for optical projection

Definitions

  • the invention relates to a cable feedthrough in a lamp, in particular a high-pressure discharge lamp for projection. It is aimed at smaller lamps with diameters of LampengefäßCften below about 10 mm.
  • Lead-throughs in such lamps are often made by means of thin metal foil strips, which are sealed to seal in a shaft of the lamp.
  • the present invention is based on the problem to improve cable feedthroughs in said lamps.
  • the invention is directed to a lamp with a lamp vessel having a shaft with a minimum outer diameter of the shaft perpendicular to the feedthrough direction, which is at most 10 mm, and having a leadthrough through the shaft, which has an electrically conductive foil, characterized that the cross-sectional profile of the film perpendicular to the direction of execution over more than half its length has a smaller radius of curvature than the largest outer radius of curvature perpendicular to the direction of passage of the shaft.
  • the invention is further directed to the use of the lamp for projection or as a light source in endoscopy.
  • lamps especially halogen and high pressure discharge lamps, more and more light output is required in important applications. This applies, for example, to projection using projectors and the like, or in the medical field as a light source during endoscopy.
  • the power and thus the light output of lamps can be increased in practice only with larger currents, which, it has been found, require larger cross-sectional areas of the conductors, in particular the films.
  • the thickness of the film strips can not be arbitrarily increased in proportion to their width, without increasing the risk of bursting of the lamp vessel, so that at least the width of the films is to be increased for a higher current carrying capacity.
  • This requires a larger diameter of the shaft in which the film is melted in conventional cable bushings, which have a straight cross-sectional profile of the film perpendicular to the direction of implementation.
  • small lamps refers to lamps with a shaft diameter of at most 10 mm.
  • Shank diameters of at most 7 mm or even at most 5 mm are particularly preferred.
  • small lamps can also be specified by a maximum inner diameter of the lamp vessel volume for light generation of this order increasingly preferably 3 cm, 2 cm or 1 cm or by a maximum operating current or maximum operating performance.
  • the invention preferably aims at lamps which typically have a maximum operating power of in this order increasingly preferably at most 750 W, 600 W or 450 W and / or are increasingly designed in this order for maximum operating currents up to 20 A, 15 A or 10 A.
  • the invention is based on the basic idea to improve the ratio of current carrying capacity of the cable bushing to the diameter of the shaft, so to increase.
  • the cross-sectional profile perpendicular to the line feedthrough of the film according to the invention has a curved shape, so that the length of the profile at a given shaft diameter can always be selected to be longer than the non-curved profile of a conventional film.
  • cross-sectional profile is used in the sense of a cross-sectional profile in a sectional plane perpendicular to the direction of execution.
  • the invention allows both the current carrying capacity to increase with the same shaft diameter, as well as to reduce the shaft diameter while maintaining the same current carrying capacity.
  • the invention also allows an increase in the current carrying capacity while reducing the shaft diameter.
  • the increased through the curved foil design technical effort is overcompensated by the improved or reduced shaft size improved performance, at least in certain applications.
  • the cross-sectional profile can also have straight sections, but has a predominantly curved basic shape and the profile has the curvature in the order increasingly preferably more than 50%, 60%, 70%, 80% or 90% of its length wherein, to reduce the risk of stress cracking in the silica glass, the thickness of the film in the order is more preferably less than 20%, 10%, 5% or 2% of the obtained length of the cross-sectional profile.
  • the profile for example U-shaped or S-shaped profiles, with possibly straight sections correspondingly short in relation to the curved sections.
  • the radius of curvature indicates a mean curvature.
  • the cross-sectional profile of the film only in the same direction curvatures, so it is either only left or right curved.
  • the film during attachment outside of a rod in particular with a convex cross-sectional profile, partially protruding from this.
  • no foil end cut to a specific shape, in particular a tapered shape, is required for connection to the rod, thus possibly simplifying the production of the foil.
  • the rod is understood as meaning an electrically conductive component of the lamp which forms the current lead from or to the foil, whereby both such a rod in the direction of the combustion chamber, ie to the place of light generation, and in the opposite direction, for example out of the lamp vessel.
  • the rod may be a contact pin or wire that passes through the outer surface of the lamp vessel to provide electrical power to the lamp; it may also be electrode part or else (current-carrying) holding device or component thereof for an incandescent filament.
  • the film sealed in a shaft of the lamp for sealing is preferably connected at least on one side to an electrically conductive rod.
  • the film is connected on both sides at opposite ends to a respective rod, one of which is in the direction of the combustion chamber and the others through the outer surface of the lamp vessel leads.
  • a ring segment and in particular a circular ring segment is preferred as the cross-sectional profile of the foil, which is arranged concentrically, for example, in the cross-sectional area of the shaft lying perpendicular to the direction of passage.
  • the preferred ring segment shape of the cross-sectional profile of the metal foil can be at a given diameter of the shaft to achieve an extension of the profile length up to about a factor of 3 compared to a non-curved film.
  • This profile is particularly suitable for high-pressure lamps, since their electrodes often have a cylindrical shape and electrode and curved film with correspondingly adapted radii directly electrically conductively connected to each other, for example, welded or soldered, can be.
  • the inventive curved cross-sectional profile of the film allows good contact with the electrode, without the electrode must be additionally provided for a larger contact surface with a flat contact surface for attaching a conventional film strip and can be produced more economically.
  • cross-sectional profiles of foil and rod correspond to one another, wherein such a correspondence is also preferred in the case of other profile shapes, that is to say non-annular.
  • the film can be placed perpendicular to the feedthrough direction at least partially around the rod, so that the film with respect to the largest possible part, at best over the entire length of its cross-sectional profile, making contact with the bar.
  • the contact area between the film and the rod is particularly problematical, with a planar film for sufficient current carrying capacity with at least 1 mm-2 mm overlap in the feedthrough direction being externally welded to the rod in conventional cable bushings.
  • the film thus lies in direct contact on the outside of the rod, while on its surface facing away from the rod it is affected by the surrounding glass due to its material properties.
  • the foils are specially designed to achieve the best possible bond with the glass of the lamp vessel.
  • molybdenum or molybdenum alloys or doped molybdenum have proven due to chemical and physical properties for the conduction of lamps.
  • the film has at least 80 wt%, 85 wt%, 90 wt%, or 95 wt% molybdenum.
  • the lamp vessel When lamps are operated, the lamp vessel is heated and, in particular at material transitions, high mechanical stresses and consequently cracks can occur if the materials have different coefficients of thermal expansion.
  • the absolute expansion on heating increases with the dimension of the material in the same direction, which is why, due to its small thickness, the film also shows only a small extent in this direction and thus only relatively low stresses. ursacht. Further, perpendicular to it, ie in the longitudinal and transverse directions of the film, occurring stresses due to the flexibility of the film are reduced.
  • the rod is relatively rigid and much thicker relative to the foil, so that it can expand more than the foil.
  • a preferred embodiment of the invention provides to make the contact surface of the film and the rod so that the film overlaps the rod as little as possible, preferably not at all, in the feedthrough direction.
  • contact surfaces for example in the vicinity of the discharge space in a high-pressure discharge lamp, which are strongly heated during operation of the lamp.
  • the overlap of film and rod is preferably reduced in the feedthrough direction by these, in this order is increasingly preferably at most 0.7 mm, 0.5 mm or 0.3 mm.
  • the electrical connection is preferably carried out by fusing, soldering or welding of foil and rod, for example by resistance welding or laser welding. In a particularly preferred embodiment, no overlap occurs in the direction of execution.
  • the foil can be connected to the rod "on impact", ie, with its end face in the direction of passage, it can be electrically connected directly to an end face of the rod.
  • the rod is then not covered over its entire circumference with respect to the implementation direction by foil, so that it has the described gap-like clearance there due to low quartz adhesion and thermal expansion in the formation of stresses in the quartz glass are reduced.
  • the film does not protrude substantially radically with respect to the direction of execution, preferably not more than approximately the thickness of the film, particularly preferably not at all, beyond the end face of the rod. At best, so the film can be contacted with their entire cross-section of the pipe at the end face of the rod, so that there is no or a slight reduction in the cross-section of the bushing at the transition of the film and rod.
  • the film is therefore tapered on both sides to these edges, wherein the taper of the edge regions, for example, by etching.
  • the outer edge areas are preferably tapered so that the film has a continuous area of uniform thickness therebetween.
  • the thickness of the film in these orders is increasingly preferably at most 100 ⁇ m, 70 ⁇ m, 60 ⁇ m, 50 ⁇ m, 45 ⁇ m or 30 ⁇ m and at least 5 ⁇ m, 10 ⁇ m or 15 ⁇ m.
  • the line cross-section should be as large as possible, so the film should be as wide as possible, and thus enclose the cross-sectional profile as large as possible, in this order increasingly preferably greater than 120 °, 180 °, 240 °, 270 ° or 320th ° is.
  • the current carrying capacity can be increased by up to a factor of three compared to a non-curved film by an extension of the profile length.
  • the enclosed angle in this order is increasingly preferably less than 350 ° or 340 °, so that the glass is connected inside and outside the area bounded by the curved film by at least one web of a certain width is.
  • the film can be at least partially placed around or on a quartz rod and fused together with this in a quartz tube of the shaft.
  • the preferably adapted to the cross-sectional profile of the film, for example As cylindrical quartz rod serves both to fix the film, possibly with already attached electrically conductive rod, as well as for filling the shaft opening.
  • two electrically parallel, curved films per line feedthrough are conceivable.
  • Two foils allow an additional gap between the foils, which provide an additional bridge of quartz glass for the mechanical connection of the glass inside and outside the curved surfaces in order to increase the stability of the lamp vessel, especially in the vicinity of the shaft.
  • a line leadthrough has two foils, they are considered as a whole in terms of the invention with regard to the features described above or below.
  • statements about the cross-sectional profile of the film should also be understood to mean a cross-sectional profile which is formed by the arrangement of the cross-sectional profiles of the two films.
  • the cross-sectional profile of the cable feedthrough can thus have non-contiguous segments.
  • the above angle specifications then apply to the sum of the angles enclosed by the films.
  • the film in this sequence increasingly preferably has over more than 50%, 70%, 80%, 90% or 99% of its length perpendicular to the feedthrough direction the cross-sectional profile curved according to the invention, a particularly preferred embodiment of the film over its entire length Length is curved.
  • the film preferably has a constant cross-sectional profile, ie the same curvature shape and a congruent cross-sectional profile. Stante film width along the direction of implementation. Due to the constant (optimized) curvature shape of the shaft diameter of the lamp vessel can be optimally used for high current carrying capacity.
  • the film may be curved only perpendicular to the feedthrough direction, so that their shape corresponds to a segment of a cylinder jacket.
  • the foil with its edges can each follow the shape of a helix extending in the direction of execution. Then, the edges are equidistant from each other, so that here too the line cross-section of the film in the feedthrough direction has no current-limiting constriction or taper.
  • Such a form of cable feedthrough can advantageously be produced by correspondingly winding a film strip.
  • the pitch or pitch varies along the feedthrough direction
  • the cross-sectional profile of the film thus wound is an ellipse segment or a polygon, at least not a circular segment, or the edges of the film strip do not run equidistant from one another
  • the film axially progressively wound in the feedthrough direction should not touch itself, in particular do not overlap by direct contact, so that at least one gap for a quartz web remains between the edges of the film along the feedthrough direction.
  • 1 shows in each case a section in the longitudinal and transverse direction of an embodiment according to the invention of a cable leadthrough with a connection of foil and electrode on impact
  • 2 each a section in the longitudinal and transverse direction of a cable bushing with overlap of film and electrode
  • FIG. 3 shows a perspective view of a line bushing according to FIG. 2,
  • FIG. 4 is a plan view of the foil with the welded electrode of FIG. 3 positioned in a shaft of a lamp vessel.
  • FIG. 5 is a plan view of a cable bushing with a helically wound film, which is welded to an electrode according to Figure 2,
  • Fig. 7 shows a section through a shaft with another cable bushing according to the invention.
  • Figure 1 shows a high pressure discharge lamp intended for use in a projector and designed for a maximum peak operating current of 6 A with a maximum operating power of 300W.
  • FIG. 1 shows a longitudinal section through a shaft 3 of the lamp with a cable leadthrough according to the invention with a curved foil 1 which has a connection 7 welded to butt to the end face of an electrode 2, which represents a rod in the previous sense.
  • a section through the shaft 3 is shown perpendicular to the feedthrough direction, showing the curved cross-sectional profile of the film 1, a circular ring segment, and the circular cross-section of the cylindrical end at its film-side electrode 2, concentric with the circular cross-sectional profile of the shaft 3 are arranged.
  • the electrode 2 has a diameter of about 0.5 mm, which corresponds to the inner radius of the annular segment-shaped cross-sectional profile of the film 1.
  • the curvature of the film 1 encloses an angle ⁇ of 330 °, so that the width of the film 1, ie the length of the (unwound) cross-sectional profile, is about 1.5 mm. Since the film 1 has the shape of this cross-sectional profile over its entire length in the feedthrough direction, the outer diameter of the shaft 3 of the lamp with 5 mm can be designed correspondingly small. Compared to a conventional implementation with a flat film, the inventive curved cable bushing thus enables an approximately three times higher current carrying capacity with an unchanged maximum diameter of the cable leadthrough of 0.5 mm.
  • the sheet 1 of the cable feedthrough is made of an alloy with more than 99 wt .-% molybdenum, doped with cerium oxide and yttrium oxide, and about 20 microns thick, wherein the film 1 at its edges 9, which between the directional direction ends of the film 1 parallel to the direction of execution, tapered towards.
  • the rejuvenation was effected by etching the film strips prior to their assembly as a line feedthrough. The taper reduces the risk of stress cracks in the quartz glass of the stem along edges 9.
  • connection 7 no overlap of film 1 and electrode 2 perpendicular to the feedthrough direction occurs through the connection 7, so that the cylindrical electrode 2 is surrounded by a gap-like free space 4 within the quartz glass on its entire lateral surface and therefore at best with thermal expansion low forces are transferred to the quartz glass.
  • FIG. 1 shows a second embodiment on the left in a sectional view in the longitudinal direction and right in a sectional view perpendicular thereto in the transverse direction. It differs from the exemplary embodiment shown in FIG. 1 by the overlap 8 of the film 1 with the electrode 2 of 0.3 mm in the feedthrough direction.
  • This embodiment allows a technically simpler welding process and differs further from the preceding embodiment by the slight widening of the radius of curvature of the film 1 by its thickness, so that it rests radially on the outside of the electrode 2.
  • the quartz glass of the shaft 3 of the lamp thereby adheres to the film 1. If the electrode 2 expands during operation of the lamp due to the operating temperatures, essentially only in the region of the overlap 8 a force is transmitted directly to the quartz glass, wherein this Area according to the invention with 0.3 mm is significantly narrower than in lamps according to the prior art. As a result, comparatively much lower voltages are also built up in the quartz glass in this lamp, thus reducing the risk of crack formation in the shaft 3.
  • Figure 3 shows a perspective view of the electrode 2 and the film 1 of Figure 2 outside the shaft 3 of the lamp vessel.
  • the film 2 is curved radially to the direction of execution around a quartz rod 5, which represents a continuation of the electrode 2 in the direction of passage. It therefore likewise has a circular cross-sectional profile with approximately the diameter of the shaft-side electrode end.
  • This embodiment thus favors a production in which the electrode 2 is sealed with the foil 1 before melting in a lamp vessel. is welded and the quartz rod 5 serves as a mechanical support, in particular in a further production step, namely the insertion of electrode 2 and foil 1 in a tube-like opening of the shaft.
  • Figure 4 shows the embodiment of Figure 3, wherein the electrode 2 is introduced with welded foil 1 by means of supporting quartz rod 5 in the tube-like opening of the shaft 3 of a lamp vessel 6.
  • the leadthrough is sealed by the quartz glass both the shaft 3 and the quartz rod 5 merges by adhesion with the film 1 and the tube-like opening of the shaft 3 is closed by the material of the quartz rod 5.
  • the electrode 2 is fixed in a favorable position for the operation of the lamp.
  • the opposite electrode and the power supply to the outside are omitted.
  • Figure 5 shows a plan view of a line feedthrough, in which the film Ia wound progressively axially in the feedthrough direction and thus their cross-sectional profile is a circular ring segment.
  • the edges 9a of the film 1a that are located between the ends in the feed-through direction are indeed equidistant from each other, but not parallel to the feedthrough direction, so that they each form a helix with an axis in the feedthrough direction.
  • the quartz glass Due to the spacing of the edges 9a, the quartz glass is connected inside and outside the region enclosed by the curved film 1a by a (quartz-shaped) quartz web.
  • the embodiment shown here allows an alternative mode of production to those previously described.
  • the film Ia and the electrode 2 further correspond to the embodiment of Figure 1, so that the welding of the film Ia with the electrode 2, even if not shown by a figure, also according to Figure 1 can be done on impact.
  • FIG. 6 shows a section perpendicular to the feedthrough direction through a line leadthrough with two foils Ib, Ic, which each have a circular-segment-segment-shaped cross-sectional profile and enclose an angle ⁇ ', ⁇ ' 1 of 165 ° each.
  • this profile shape has an additional, second connecting web of the quartz glass inside and outside the area enclosed by the (curved) cable leadthrough, with an angle of 330 ° also being enclosed in total.
  • This additional ridge serves to mechanically stabilize the shaft 3 and reduces the risk of fissures in the quartz glass while still achieving the same increase in ampacity compared to the embodiments illustrated in Figs. 1-4.
  • the films Ib, Ic can both be welded to the electrode in accordance with FIG. 1 or FIG.
  • the variant according to FIG. 5 could also have two film strips.
  • FIG. 7 A further exemplary embodiment is shown in FIG. 7, which relates to a lamp similar to the previously described high-pressure discharge lamp, but in which the shaft 3a and the shaft-side end of the electrode 2a has an oval-flattened cross-sectional profile.
  • This embodiment demonstrates the independence of the idea of the invention (including Figure 5) of the Kreisgeo- geometry and shows a film Id whose cross-sectional profile is a ring segment of oval basic shape and the curvature forms an angle ⁇ of 330 °.
  • two cable ducts according to the invention of different polarity in a shaft 3 of a lamp may be arranged side by side.
  • films of the two line feedthroughs can be arranged corresponding to a single line feedthrough with two or more films in the sense of the invention.
  • both the electrical power of a lamp can be increased, and the size can be reduced.
  • This is particularly advantageous for high-pressure discharge lamps, with the preferred reduction of the overlap 9 of foil 1 and electrode 2, and in particular also its welding on impact, reducing the risk of stress cracks and thus of bursting of the lamp vessel 6.

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  • Vessels And Coating Films For Discharge Lamps (AREA)

Abstract

L’invention concerne un passage de conducteur à travers une tige (3, 3a) d’une petite lampe avec une feuille électriquement conductrice (1, 1a, 1b, 1c, 1d) qui présente un profil de section transversale curviligne perpendiculairement au passage de conducteur tant pour augmenter l’intensité maximale admise par le passage de conducteur que pour permettre une diminution du diamètre de la tige (3, 3a).
PCT/EP2008/057080 2008-06-06 2008-06-06 Passage de conducteur avec profil de feuille curviligne WO2009146751A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/EP2008/057080 WO2009146751A1 (fr) 2008-06-06 2008-06-06 Passage de conducteur avec profil de feuille curviligne
TW098118479A TW201007808A (en) 2008-06-06 2009-06-04 Cable bushing with curred foil profile

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2008/057080 WO2009146751A1 (fr) 2008-06-06 2008-06-06 Passage de conducteur avec profil de feuille curviligne

Publications (1)

Publication Number Publication Date
WO2009146751A1 true WO2009146751A1 (fr) 2009-12-10

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PCT/EP2008/057080 WO2009146751A1 (fr) 2008-06-06 2008-06-06 Passage de conducteur avec profil de feuille curviligne

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TW (1) TW201007808A (fr)
WO (1) WO2009146751A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106094144A (zh) * 2016-08-29 2016-11-09 中天海洋系统有限公司 一种附加薄膜电容的海底有缘光缆的直通连接装置

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0479087A1 (fr) * 1990-10-02 1992-04-08 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Lampe à décharge à haute pression
US5629585A (en) * 1994-09-21 1997-05-13 Patent-Treuhand-Gesellschaft F. Elektrische Gluehlampen Mbh High-pressure discharge lamp, particularly low-rated power discharge lamp, with enhanced quality of light output
EP1049134A1 (fr) * 1998-10-19 2000-11-02 Ushio Denki Kabushiki Kaisya Lampe et enveloppe de lampe fabriquee dans un materiau a gradient fonctionnel
EP1343196A2 (fr) * 2002-03-05 2003-09-10 Ushiodenki Kabushiki Kaisha Lampe à décharge à très haute pression du type à arc court
EP1376653A2 (fr) * 2002-06-24 2004-01-02 Matsushita Electric Industrial Co., Ltd. Lampe aux halogénures métalliques
EP1519403A2 (fr) * 2003-09-08 2005-03-30 Matsushita Electric Industrial Co., Ltd. Lampes aux halogénures métalliques
JP2008108504A (ja) * 2006-10-24 2008-05-08 Harison Toshiba Lighting Corp 管型白熱電球、管型白熱電球の製造方法、加熱装置

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0479087A1 (fr) * 1990-10-02 1992-04-08 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Lampe à décharge à haute pression
US5629585A (en) * 1994-09-21 1997-05-13 Patent-Treuhand-Gesellschaft F. Elektrische Gluehlampen Mbh High-pressure discharge lamp, particularly low-rated power discharge lamp, with enhanced quality of light output
EP1049134A1 (fr) * 1998-10-19 2000-11-02 Ushio Denki Kabushiki Kaisya Lampe et enveloppe de lampe fabriquee dans un materiau a gradient fonctionnel
EP1343196A2 (fr) * 2002-03-05 2003-09-10 Ushiodenki Kabushiki Kaisha Lampe à décharge à très haute pression du type à arc court
EP1376653A2 (fr) * 2002-06-24 2004-01-02 Matsushita Electric Industrial Co., Ltd. Lampe aux halogénures métalliques
EP1519403A2 (fr) * 2003-09-08 2005-03-30 Matsushita Electric Industrial Co., Ltd. Lampes aux halogénures métalliques
JP2008108504A (ja) * 2006-10-24 2008-05-08 Harison Toshiba Lighting Corp 管型白熱電球、管型白熱電球の製造方法、加熱装置

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106094144A (zh) * 2016-08-29 2016-11-09 中天海洋系统有限公司 一种附加薄膜电容的海底有缘光缆的直通连接装置
CN106094144B (zh) * 2016-08-29 2022-09-06 中天海洋系统有限公司 一种附加薄膜电容的海底有缘光缆的直通连接装置

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