EP0584071B1 - Reflektor mit lampe - Google Patents

Reflektor mit lampe Download PDF

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Publication number
EP0584071B1
EP0584071B1 EP92900018A EP92900018A EP0584071B1 EP 0584071 B1 EP0584071 B1 EP 0584071B1 EP 92900018 A EP92900018 A EP 92900018A EP 92900018 A EP92900018 A EP 92900018A EP 0584071 B1 EP0584071 B1 EP 0584071B1
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EP
European Patent Office
Prior art keywords
facets
filament
reflector
lamp assembly
facet
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
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EP92900018A
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English (en)
French (fr)
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EP0584071A1 (de
Inventor
Robert E. Levin
Lieven A. Deweerdt
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Flowil International Lighting Holding BV
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Flowil International Lighting Holding BV
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Priority claimed from US07/697,828 external-priority patent/US5272408A/en
Application filed by Flowil International Lighting Holding BV filed Critical Flowil International Lighting Holding BV
Publication of EP0584071A1 publication Critical patent/EP0584071A1/de
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V7/00—Reflectors for light sources
    • F21V7/04—Optical design
    • F21V7/09—Optical design with a combination of different curvatures
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V7/00—Reflectors for light sources
    • F21V7/04—Optical design
    • F21V7/048—Optical design with facets structure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V7/00—Reflectors for light sources
    • F21V7/04—Optical design
    • F21V7/06—Optical design with parabolic curvature

Definitions

  • This invention relates to electric lamps having reflectors for providing a desired light pattern and, more particularly, to a lamp assembly including a reflector having a multiplicity of reflecting facets and a relatively long, small diameter filament.
  • Reflector lamps commonly known PAR lamps, are well known in the art and have been in commercial use for many years. These lamps are fabricated of pressed glass and include a reflector having a reflecting surface, a light source and a cover or lens.
  • the reflecting surface is typically a concave paraboloid.
  • the light source is typically a tungsten filament or a tungsten halogen lamp capsule, an arc discharge tube also can be utilized.
  • the cover may be clear or may be omitted when a tungsten halogen capsule is used, but most commercial lamps have had stippled and/or lenticular configurations in the cover glass to smooth the beam and/or to provide the required beam spread.
  • the filament is located as close as possible to the focal point of the reflecting surface.
  • a principal advantage of PAR lamps is that the reflector and the lens form optically controlled light beams ranging from narrow spotlights to wide floodlights. Beam angles range from a few degrees to about 60 degrees. Since the lamps are prefocused at the time manufacture, the problems of combining separate components in the field are avoided. Since the optical surfaces are sealed within the lamp, they remain clean and in good condition throughout the life of the lamp, regardless of environmental conditions. Luminaires and lampholders do not require any optical components and are relatively inexpensive and simple to manufacture. Nevertheless, different beam spreads and beam intensities are possible with a single luminaire simply by selecting another PAR lamp.
  • One of the problems in designing PAR lamps is to control the beam pattern produced by the lamp for different sizes and orientations of filaments.
  • the filament is typically located at or near the focal point of the reflector, beam spreading occurs because the filament has a finite size.
  • the dimensions of the filament are dictated primarily by the voltage and wattage ratings of the lamp. It has been particularly difficult to obtain a desired light pattern with a long, small diameter filament, which generally corresponds to a relatively high operating voltage.
  • the beam pattern produced by a long, small diameter filament mounted axially in a reflector typically includes a small central area of high intensity and a large surrounding area of lower but significant intensity.
  • the desired pattern is a central region of uniformly high intensity which smoothly falls off to an insignificant value outside the central region.
  • Still another technique for controlling the light pattern is to introduce small local deformations of the basic reflector surface.
  • the local deformations can take the form of facets, peens, ribs, or the like.
  • the light is spread by a specular surface through a given angular range that is established by the geometry of the local curvature.
  • the advantage of facets or peens is that the light is spread about the direction that the light would take in the absence of the element, and the magnitude of the spread is determined by the design of the element. No light is spread beyond the design limit. Thus, control of the beam shape is maintained, and light is not scattered out of the beam to reduce beam efficiency unless such spread is deliberately desired.
  • a projector lamp reflector having a faceted surface for spreading the image formed by the reflector into a larger and smoother pattern and reducing the amount of imaging of the lamp filament and support posts is disclosed in U.S. Patent No. 4,021,659 (over which claim 1 has been characterised) issued May 3, 1977 to Wiley.
  • a headlight reflector having offset facets is disclosed in U.S. Patent No. 1,394,319 issued October 19, 1921 to McNeal.
  • the facet rings in the McNeal reflector appear to have different numbers of facets.
  • a projection lamp with a reflector having facets and an axially oriented filament is disclosed in U.S. Patent No., 4,545,000 issued October 1, 1985 to Fraley et al.
  • Multifaceted reflectors are also disclosed in U.S. Patent No. 4,153,929 issued May 8, 1979 to Laudenschlarger et al; U.S. Patent No. 3,511,983 issued May 12, 1970 to Dorman; U.S. Design Patent No. 253,195 issued October 16, 1979 to Henkel et al; U.S. Design Patent No. 61,209 issued July 11, 1922 to Otte; and U.S. Design Patent No. 61,210 issued July 11, 1922 to Otte.
  • GB-A-2,082,745 It is also known from GB-A-2,082,745 to provide a projector lamp having a transverse mounted filament with an array of facets. Th facets cover a region of between 35 to 60% of the surface of the reflector and are arranged in rings located toward the rim of the reflector.
  • a lamp assembly comprising:
  • the axis of rotation defines an axial direction and a rotational direction around the axis.
  • the reflecting facets are arranged in axially adjacent rings that are centered on the axis and lie in a plane perpendicular to the axis.
  • at least a plurality of the facet rings each has the same number of facets.
  • adjacent rings with the same number of facets are successively offset in the rotational direction so as to reduce circumferential variations in the light pattern.
  • the total rotational offset of the plurality of rings is preferably not less than about one half the angle subtended by one of the facets.
  • the facets have a curvature and dimension in the rotational direction selected to provide the desired filament width spread.
  • the facets are typically rectangular in shape and are not substantially curved in the axial direction so as to limit filament length spread.
  • a reflector lamp having a long, small diameter filament is shown in FIG. 1.
  • a reflector 10 of approximately paraboloidal shape contains a high voltage tungsten halogen capsule 12 with a long, small diameter tungsten incandescent filament 14.
  • long, small diameter filaments are those having a length to diameter ratio of at least 6:1.
  • the filament 14 is approximately centered on a focal point 16 of reflector 10.
  • the longitudinal axis of filament 14 lies on an axis 18 of reflector 10.
  • a small, incremental element 20 of the reflector surface is located at an arbitrary point on the reflecting surface and has a normal that intersects or passes near the reflector axis 18.
  • a screen 30 is positioned perpendicular to reflector axis 18 and at a great distance from the reflector 10.
  • the axis 18 intersects the screen at point 32.
  • the screen 30, viewed along axis 18 from the position of reflector 10, is shown in FIG. 2.
  • boundary 34 The size, aspect ratio and orientation of boundary 34 depends not only on the filament dimensions, but also on the location of element 20 in space relative to filament 14.
  • the screen 30 is shown in FIG. 3 with light reflected from incremental elements at several different locations on the reflector 10 to form images 35, 36, 37, etc.
  • the light pattern produced on screen 30 by the reflector lamp assembly, as shown in FIG. 1 is the sum of contributions from all the incremental elements of the reflecting surface. All or nearly all the elements of the reflector contribute light at points within a central region 40. With respect to points successively outward from region 40 to an outer limit 42, fewer and fewer reflector elements contribute light.
  • the light pattern thus produced in a plane perpendicular to reflector axis 18 is shown graphically in FIG. 4.
  • Light intensity is plotted as a function of angle from reflector axis 18.
  • a high intensity portion 44 corresponding to region 40 near the beam center is superimposed on a low intensity portion 46 that spreads over a large angular range.
  • Relatively large changes in the shape of reflector 10 produce only minor changes in the central part of the beam shown in FIG. 4. Instead, the boundary of region 42 in the low intensity part of the beam changes.
  • the outer part of the light pattern is well beyond the main, and commonly and most useful, part of the beam.
  • the beam angle is typically defined as the angle which includes a region where the light intensity is greater than 50% of the maximum intensity.
  • a beam pattern of the type shown in FIG. 4 is undesirable because it has a central region of high intensity and a relatively large surrounding area of low but significant intensity.
  • a more desirable beam pattern has a relatively uniform intensity within a desired beam angle and smoothly falls off to an insignificant intensity outside the beam angle.
  • a preferred beam pattern is shown in FIG. 5.
  • a faceted reflecting surface is used to provide a desired light pattern with a long, small diameter filament.
  • the pattern is generally of the form shown in FIG. 5 and can have a desired beam width in the range of about 7 to 65 degrees, even when long, small diameter filaments are utilized.
  • the facets are used control the beam pattern from the reflector.
  • a reflecting surface 60 includes a multiplicity of reflecting facets 62.
  • Each facet 62 has a reflecting surface of a defined size and curvature as discussed below.
  • the facets are arranged in rings 66 centered on a reflector axis 64 and lying in planes perpendicular to reflector axis 64.
  • the facets 62 are arranged in columns 68, as best shown in FIG. 6A, so that the facets in a column are aligned in an axial direction.
  • each of the rings 66 has the same number of facets.
  • the reflecting surface 60 includes one or more groups of facet rings.
  • the facet rings within each group have the same number of facets.
  • a reflecting surface may include a group of 12 rings each having 50 facets and a group of 7 rings each having 25 facets.
  • the size and shape of a light beam reflected from a single facet 62 is a function of three parameters: 1) the beam spread that would occur in the limit as the area of the facet shrinks to zero (this is the spread discussed above in conjunction with FIG. 1), 2) the area of the facet and 3) the surface curvature of the facet.
  • the area and the surface curvature are interactive.
  • the spread in any plane containing the central normal to the facet is a function of the product of the linear dimension of the facet in that plane and the curvature of the intersection of the facet with the plane.
  • a smooth, nonfaceted reflector with a long, small diameter filament produces a light distribution as shown in FIGS. 3 and 4.
  • the objective is to make a light pattern of the general form shown in FIG. 5 where the beam angle e shown in FIG. 5 is significantly greater than the beam angle shown in FIG. 4.
  • meridional and sagittal planes are defined.
  • the meridional plane for a facet is that plane containing the reflector axis of revolution and passing through the center of the facet.
  • the sagittal plane is that plane containing the central ray of the reflected solid angle pencil of rays and normal to the meridional plane.
  • the coils of an axially located incandescent filament produce cosmetically objectionable ring-type striations about the center of light beam. Therefore a very small spread is introduced by the facet 62 in the meridian plane (direction Y-Y of FIG. 2).
  • the angular spread to be added in the meridional plane is approximately that of the angular separation of striations when the beam is viewed using a smooth reflector.
  • the facets over at least 50% of the reflecting surface of reflector 60 have dimensions and curvature selected to produce filament image 34 (FIG. 2), wherein a ratio of filament width spread in the X-X direction to filament length spread in the Y-Y direction produced by the facets is at least 2:1 and is preferably 3:1 or greater.
  • the reflector configuration of the invention is advantageously used with filaments having a length to diameter ratio of 6:1 or greater and is preferably utilized with filaments having a length to diameter ratio of 12:1 or greater.
  • Typical filaments rated above 120 volts and below 150 watts have a length in a range of about 10 mm to 25 mm and a diameter in a range of about 0.2 mm to 2 mm.
  • the design of a reflector lamp assembly starts with the filament required to meet the desired voltage rating.
  • the desired life rating of the lamp determines the filament temperature.
  • the luminous flux to form the required intensity distribution determines the filament power, or wattage. From the voltage, temperature and power of the filament, the size of a practical, stable and manufacturable filament can be determined by standard, well-known filament design techniques.
  • the elemental beams from various parts of a smooth reflector of the desired size are determined either by experiment or by analysis using standard ray tracing techniques of geometric optics as they apply to reflective surfaces. For example, see “Mirror and Prism Systems", R. Hopkins, in Applied Optics and Optical Engineering, Vol. III, R. Kingslake Editor, Academic Press, 1965, pages 269 to 308. Then, sagittal spread and spread in the meridional plane are added until the desired beam pattern is obtained. The general facet pattern is shown in FIGS. 6A and 6B.
  • the width and curvature of a facet cannot be determined by a closed form equation, these parameters are determined by ray traces using standard techniques of geometrical optics. Rays are traced from the perimeter of the projected area of the filament as seen from a facet location, as illustrated by solid angles 22 and 28 in FIG. 1. The reflected rays are first determined about the normal to the base reflector at the location of the facet. This represents the inherent spread due to the filament size and orientation and the location of the filament relative to the facet. This is the inherent spread for the point that cannot be reduced by local modification of the reflector. Next, the change in direction of the normal in the sagittal plane is determined for the required total beam spread in the sagittal plane (X-X direction spread in FIG. 2).
  • a facet 76 has a width W and a radius of curvature R.
  • the radius of curvature can be convex or concave with respect to the reflecting surface.
  • the curvature of facet 76 is convex.
  • An incident perimeter ray 78 from the filament reflects about a normal 80 to the base reflector curve as a reflected ray 82.
  • the facet is essentially centered about normal 80.
  • the facet 76 has normals 84 and 86 at the edges defining width W.
  • a ray 88 from the same initial perimeter point as ray 78 is at a small acute angle ⁇ from ray 78 and is incident on the facet edge at normal 84.
  • a reflected ray 90 deviates from the original reflected ray 82 by an angle ⁇ .
  • the required angular separation of the edge normals 84 and 86 can be determined.
  • a given separation can be achieved by various combinations of width W and radius of curvature R.
  • the facets have been described as symmetrical about a normal to the base curve near their center as shown in FIG. 8, the facets can be asymmetric about that normal, particularly in sagittal plane. This configuration directs light more to one side of the meridian plane through the facet than to the other side. Also, the facets at various circumferential locations about the reflector are not required to be the same. Such variations can be used to produce asymmetric light patterns with a reflector of nominal revolution.
  • a paraboloidal reflector 70 for a lamp of 95 mm overall diameter and having an aperture diameter of 82 millimeters and a focal length of 13 mm was constructed.
  • the filament for the present example designed to operate at 225 volts, had a length of 19.3 mm and a diameter of 0.71 mm.
  • the filament was located on the X axis of the reflector shown in FIG. 7.
  • the reflecting surface included facets arranged in 19 circumferential rings as specified in Table 1 below.
  • the facet rings are numbered consecutively starting with the front surface of the reflector and proceeding toward the base of the reflector. Rings 1, 2 and 3 are shown by way of example in FIG. 7.
  • Table 1 indicates the number of facets in the ring, the mean diameter Y of the ring, the width W of each facet in the ring, the radius of curvature R of each cylindrical facet in the ring and the height H of the ring.
  • the axis of the cylinder is in a meridional plane through the center of the facet.
  • the dimensions in Table 1 are in millimeters.
  • the parameters mean diameter Y and H are shown in FIG. 7.
  • the parameters W and R are shown in FIG. 8. Each ring of facets was displaced by 1° with respect to adjacent rings.
  • the beam pattern produced by the above example of the present invention is shown in FIG. 9 as curve 94.
  • the beam pattern has a central region of more or less uniform intensity and a beam width of about 30°. The intensity decreases rapidly outside the beam pattern.
  • the central part of the light beam produced by the reflector 60 shown in FIGS. 6A and 6B is composed of overlapping beams from many or all of the reflector facets. Due to the overlapping of many components of different spread and orientation, the central part of the beam is relatively uniform. Near the outer periphery of the beam pattern, however, only a few facets contribute light at any given point. The light pattern of each facet is long radially and narrow circumferentially. The angular separation of facet columns in the circumferential direction appears in the light pattern as circumferential variations in light intensity. If the angular separation of the few beams that overlap in the outer region is sufficient, radial streaks or striations are observed near the edge of the beam.
  • facet width is one of the parameters that determines the overall beam angle of the reflector lamp and cannot be freely changed. Furthermore, an increase in the number of facets increases scattered light and increases the cost of tooling as discussed above.
  • the total beam from a column of facets is spread circumferentially without changing the spread from any individual facet by centering each facet in the column on a different meridian plane or at least distributing the facet centers among several meridian planes.
  • This technique can be described in terms of circumferential facet rings. Each facet ring is advanced, or offset, by a small angle with respect to the adjacent ring.
  • a reflector 100 includes a facet ring 102 that is offset in a circumferential direction from an adjacent facet ring 104.
  • facet ring 104 is offset in a circumferential direction from an adjacent facet ring 106.
  • facet rings are successively offset in a circumferential direction.
  • the reflector 100 is the same as the faceted reflectors described above, except that the facet rings are offset in a circumferential direction.
  • a general description of the reflector appearance is that the facet columns spiral.
  • the size of the angular offset for each ring depends on the striations that must be concealed and their sharpness. However, it is not necessary that each pair of adjacent rings have a full offset. Large angular offsets between adjacent rings can cause significant discontinuities between elements of the reflecting surface. Such discontinuities make production of the reflector more difficult and increase light scattering and loss.
  • small offsets are provided between adjacent rings such that the cumulative offset provides the necessary smoothing.
  • a reflector and filament having facets produced a 10° beam angle.
  • the inherent spread of the reflector without facets was about 3.5°, and the spread added by the facets was about 6.5°. Little light was transferred to the outer part of the beam by this small spread, and radial striations were obvious at the beam edge when the facet rings were not offset.
  • the reflector had 44 facet columns so that each of the 44 facets in a ring subtended an angle of about 8.18° about the reflector centerline. There were 24 facets in each column between the face and the vertex region of the reflector. One degree of angular offset was added successively to each facet ring such that the facet column spiraled a total of 24° about the reflector centerline. This offset configuration eliminated the radial striations that had a period of about 8.18°.
  • the period of striations near the outer boundaries of the beam pattern matches the facets in a ring.
  • the minimum total angle of spiral for a column of facets to provide satisfactory smoothing generally falls between one-half of the facet angle and the full facet angle.
  • the offset between adjacent facet rings is not greater than about 40% of the angle subtended by one of the facets.
  • the offset between adjacent facet rings is typically about 30% or less of the angle subtended by one of the facets. Since the offset of facet rings within a column of facets contributes to smoothing in general for a variety of nonuniformities, the offset angle can be increased to a value greater than that required for controlling radial striations at the edge of the beam when it is advantageous to do so.
  • successively offset facet rings can be utilized in any reflector lamp to reduce or eliminate circumferential nonuniformities in the light pattern.
  • the techniques describes herein are typically utilized with open faced lamps or lamps having a clear cover. However, the disclosed techniques can be utilized with a lens to further vary the light distribution. Although the reflector and lamp combination described herein is typically a PAR lamp, the invention can be applied to reflectors in luminaires using separate lamps.
  • FIGS. 11 and 12 Examples of lamps in accordance with the present invention are shown in FIGS. 11 and 12.
  • a lamp 120 shown in FIG. 11 includes a reflector 122 having offset facet rings, a base 124 with an electrical connector 126, a cover 128 and a lamp (not shown).
  • a lamp 130 shown in FIG. 12 includes a reflector 132 with offset facet rings, a base with a bipin connector 134, a cover 136 and a lamp (not shown).
  • the present invention provides: an improved reflector lamp assembly; a faceted lamp reflector for use with a long, small diameter filament; a reflector lamp assembly that is operable with relatively high voltages; a reflector lamp assembly that has a selectable beam width without a surrounding area of low but significant intensity; a reflector lamp assembly having a uniform beam pattern; a reflector lamp assembly wherein circumferential variations in the beam pattern are substantially eliminated; a reflector lamp assembly that is easy to manufacture and low in cost; and a technique wherein significantly differing beam angles can be formed without changing the size or basic shape of a lamp reflector.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Optical Elements Other Than Lenses (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Claims (11)

  1. Lampenaufbau mit:
    einem Reflektor (10; 60; 100; 122; 132), der eine konkave Reflexionsfläche und eine Rotationsachse (18; 64) aufweist, wobei die Reflexionsfläche eine Mehrzahl von reflektierenden Facetten (20; 62; 76) besitzt, und mit
    einer einen Glühfaden (14) aufweisenden Lichtquelle (12), die im wesentlichen im Fokus der Reflexionsfläche und mit der Rotationsachse fluchtend angebracht ist,
    dadurch gekennzeichnet, daß der Glühfaden ein Verhältnis von Länge zu Durchmesser von 6:1 oder größer aufweist, und daß die Facetten (20; 62; 76) über zumindest 50 % der Reflexionsfläche Abmessungen und Krümmungen aufweisen, die zur Erzeugung eines Lichtmusters ausgewählt sind, bei welchem ein von den Facetten hervorgerufenes Verhältnis von Glühfadenbreitenstreuung zu Glühfadenlängenstreuung zumindest 2:1 ist.
  2. Lampenaufbau nach Anspruch 1, bei welchem die Rotationsachse (18; 64) eine Axialrichtung und eine Rotationsrichtung um die Achse definiert und bei welcher die reflektierenden Facetten (20; 62; 76) in axial aneinandergrenzenden Ringen (66; 102, 104, 106) angeordnet sind, die auf der Achse zentriert sind und in einer zur Achse senkrechten Ebene liegen.
  3. Lampenaufbau nach Anspruch 2, bei welchem zumindest eine Mehrzahl dieser Ringe (66; 102, 104, 106) die gleiche Anzahl Facetten besitzt.
  4. Lampenaufbau nach Anspruch 3, bei welchem aneinandergrenzende Ringe (102, 104, 106) mit der gleichen Anzahl von Facetten in Rotationsrichtung aufeinanderfolgend gegeneinander versetzt sind.
  5. Lampenaufbau nach Anspruch 4, bei welchem der Versatz zwischen aneinandergrenzenden Facettenringen (102, 104, 106) nicht größer ist als 40 Prozent des Winkels, unter dem sich eine der Facetten erstreckt.
  6. Lampenaufbau nach Anspruch 4, bei welchem der gesamte Versatz der Mehrzahl von Ringen (102, 104, 106) in Drehrichtung nicht kleiner ist als eine Hälfte des Winkels, unter dem sich eine der Facetten erstreckt.
  7. Lampenaufbau nach irgendeinem der vorhergehenden Ansprüche, bei welchem das Verhältnis von Glühfadenbreitenstreuung zu Glühfadenlängenstreuung, das von den Facetten (20; 62; 76) erzeugt wird, zumindest 3:1 beträgt.
  8. Lampenaufbau nach irgendeinem der vorhergehenden Ansprüche, bei welchem der Glühfaden (14) ein Verhältnis von Länge zu Durchmesser von 12:1 oder größer aufweist.
  9. Lampenaufbau nach irgendeinem der vorhergehenden Ansprüche, bei welchem der Glühfaden (14) für einen Betrieb mit etwa 220 Volt Wechselstrom ausgelegt ist.
  10. Lampenaufbau nach irgendeinem der vorhergehenden Ansprüche, bei welchem die Facetten (20; 62; 76) von rechteckiger Gestalt und in Axialrichtung nicht wesentlich gekrümmt sind.
  11. Lampenaufbau nach irgendeinem der vorhergehenden Ansprüche, bei welchem die Facetten eine Krümmung und eine Abmessung in Rotationsrichtung aufweisen, die derart ausgewählt ist, daß eine gewünschte Glühfadenbreitenstreuung geschaffen wird.
EP92900018A 1991-04-03 1991-10-02 Reflektor mit lampe Expired - Lifetime EP0584071B1 (de)

Applications Claiming Priority (7)

Application Number Priority Date Filing Date Title
US67959791A 1991-04-03 1991-04-03
US67959691A 1991-04-03 1991-04-03
US679597 1991-04-03
US679596 1991-04-03
US07/697,828 US5272408A (en) 1991-05-09 1991-05-09 Lamp and reflector assembly
US697828 1991-05-09
PCT/US1991/007373 WO1992017733A1 (en) 1991-04-03 1991-10-02 Lamp and reflector assembly

Publications (2)

Publication Number Publication Date
EP0584071A1 EP0584071A1 (de) 1994-03-02
EP0584071B1 true EP0584071B1 (de) 1999-01-07

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EP (1) EP0584071B1 (de)
CA (1) CA2106984C (de)
DE (1) DE69130738T2 (de)
WO (1) WO1992017733A1 (de)

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EP1672276A2 (de) 2004-12-17 2006-06-21 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH PAR-Lampenanordnung
WO2007138321A1 (en) * 2006-05-31 2007-12-06 Jacob Dyson A light
CN103244906A (zh) * 2012-02-10 2013-08-14 伊古齐尼照明有限公司 用于照明装置的均匀照明反射器

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US6086227A (en) * 1998-09-11 2000-07-11 Osram Sylvania Inc. Lamp with faceted reflector and spiral lens
US6454433B1 (en) * 2001-05-24 2002-09-24 Eveready Battery Company, Inc. Dual faceted reflector
DE102004042915B4 (de) 2004-09-02 2011-04-14 Erco Gmbh Leuchte zur Ausleuchtung von Gebäudeflächen oder Gebäudeteilflächen
DE102005029669A1 (de) 2005-06-22 2007-01-11 Arnold & Richter Cine Technik Gmbh & Co. Betriebs Kg Scheinwerfer
DE102007016748A1 (de) * 2007-04-07 2008-10-09 Tetsuhiro Kano Reflektor für eine Leuchte
DE102007035396B4 (de) * 2007-07-26 2011-04-14 Erco Gmbh Leuchte
DE102007035528B9 (de) * 2007-07-26 2012-02-09 Erco Gmbh Leuchte
DE102009001061B4 (de) * 2009-02-23 2016-01-07 Margit Weghenkel Reflektoranordnung für flächige Beleuchtungskörper
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EP2428727B1 (de) * 2010-08-25 2013-11-13 Jordan Reflektoren GmbH & Co.KG Leuchten-Reflektor sowie Vorrichtung zu dessen Herstellung
EP2535639A1 (de) * 2011-06-17 2012-12-19 Jordan Reflektoren GmbH & Co.KG Leuchten-Reflektor sowie Vorrichtung zu dessen Herstellung
DE102012211938B4 (de) * 2012-07-09 2015-07-16 Oktalite Lichttechnik GmbH Reflektor mit ebenen Reflektorflächen
EP3098504B1 (de) 2015-05-06 2019-08-28 Bega Gantenbrink-Leuchten KG Verdrehte tiefstrahler-reflektoren
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EP1672276A2 (de) 2004-12-17 2006-06-21 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH PAR-Lampenanordnung
WO2007138321A1 (en) * 2006-05-31 2007-12-06 Jacob Dyson A light
US8052309B2 (en) 2006-05-31 2011-11-08 Jacob Dyson Lighting system with reflector that moves in a periodic manner
CN103244906A (zh) * 2012-02-10 2013-08-14 伊古齐尼照明有限公司 用于照明装置的均匀照明反射器

Also Published As

Publication number Publication date
CA2106984C (en) 2001-12-18
WO1992017733A1 (en) 1992-10-15
DE69130738D1 (de) 1999-02-18
DE69130738T2 (de) 1999-09-02
CA2106984A1 (en) 1992-10-04
EP0584071A1 (de) 1994-03-02

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