EP2812629A1 - Projecteur à réflecteur - Google Patents

Projecteur à réflecteur

Info

Publication number
EP2812629A1
EP2812629A1 EP13706910.0A EP13706910A EP2812629A1 EP 2812629 A1 EP2812629 A1 EP 2812629A1 EP 13706910 A EP13706910 A EP 13706910A EP 2812629 A1 EP2812629 A1 EP 2812629A1
Authority
EP
European Patent Office
Prior art keywords
reflector
concave mirror
emitter
aperture
focal point
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.)
Granted
Application number
EP13706910.0A
Other languages
German (de)
English (en)
Other versions
EP2812629B1 (fr
Inventor
Jan Schulz
Peter ROHDE
Michael Potthoff
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Alfred-Wegener-Institut Helmholtz-Zentrum fur Pol
Original Assignee
Alfred Wegener Insitut fuer Polar und Meeresforschung
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 Alfred Wegener Insitut fuer Polar und Meeresforschung filed Critical Alfred Wegener Insitut fuer Polar und Meeresforschung
Publication of EP2812629A1 publication Critical patent/EP2812629A1/fr
Application granted granted Critical
Publication of EP2812629B1 publication Critical patent/EP2812629B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V7/00—Reflectors for light sources
    • F21V7/0025—Combination of two or more reflectors for a single light source
    • F21V7/0033—Combination of two or more reflectors for a single light source with successive reflections from one reflector to the next or following
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V5/00—Refractors for light sources
    • F21V5/04—Refractors for light sources of lens shape
    • F21V5/045—Refractors for light sources of lens shape the lens having discontinuous faces, e.g. Fresnel lenses
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V7/00—Reflectors for light sources
    • F21V7/0008—Reflectors for light sources providing for indirect lighting
    • 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
    • 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
    • F21V7/08—Optical design with elliptical curvature
    • 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
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S8/00—Lighting devices intended for fixed installation
    • F21S8/003—Searchlights, i.e. outdoor lighting device producing powerful beam of parallel rays, e.g. for military or attraction purposes
    • 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
    • F21V31/00—Gas-tight or water-tight arrangements
    • F21V31/005—Sealing arrangements therefor
    • 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
    • F21Y2103/00—Elongate light sources, e.g. fluorescent tubes
    • F21Y2103/30—Elongate light sources, e.g. fluorescent tubes curved
    • F21Y2103/33—Elongate light sources, e.g. fluorescent tubes curved annular
    • 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]

Definitions

  • the invention relates to a reflector emitter, which serves to generate a beam directed in a main emission direction, with a combined reflector.
  • This is composed of two or more mirrored Rotationsellipsoidenabêt and a central concave mirror.
  • Each ellipsoid of revolution is formed of an ellipsoid of revolution extending in a longitudinal plane passing through both foci and perpendicular thereto between its center and one of its foci
  • the concave mirror is formed from a hollow body having at least one focal point and cut in a sectional plane.
  • Rotationsellipsoidenabête and concave mirrors each have an opening which are arranged opposite to each other.
  • the outlying focal points of the Rotationsellipsoidenabête and the focal point of the concave mirror coincide.
  • the ellipsoidal rotation sections are arranged uniformly around the central concave mirror.
  • the reflector radiator comprises a relative to the concave mirror arranged on the side of the ellipsoidal rotation sections
  • Aperture at least two, each within the ellipsoidal rotation section lying focal point arranged radiation sources with known radiation characteristics and other internal VerSpiegelonne.
  • Such reflector emitters have a particularly high luminous efficiency or low losses due to scattering. All rays that emanate from the radiation source and hit the mirrored ellipsoidal section are reflected in the second focal point of the ellipsoid of revolution and thus in the focal point of the concave mirror.
  • the concave mirror reflects the light in a collimated beam in the main emission direction through the aperture. Already with a light source beam collimation can lead to an increase in intensity. In particular, with such reflector radiators, the light from a plurality of generally less faint radiation sources can be bundled into a single strong beam. Such arrangements can be used for applications in which a high light output at given radiation angles is advantageous.
  • PRIOR ART US 2005/0094402 A1 discloses a reflector emitter which can be used as a car headlight, in which a mirror in the form of an ellipsoidal rotation section with a radiation source in the one existing focal point is arranged behind a further concave mirror, which is designed as a paraboloid section, such that the focal points of the ellipsoidal section of revolution and the paraboloidal section in a common plane perpendicular to
  • Radiation source radiation is reflected by the ellipsoidal section of revolution into the paraboloidal section resulting from a paraboloid of revolution by cutting off its closed end to form two parallel openings.
  • a number of rays are emitted from the non-punctiform but longitudinally extended radiation source in addition reflected in the upper part of the paraboloidal section and reinforce the desired in motor vehicles low beam effect by the main beam is directed slightly down to the road.
  • this form of headlamp produces a circular dark zone at the center of the beam from the diameter of the cut end of the paraboloidal section, and thus has none in spite of the increasing diffusion with distance
  • the central concavity mirror can only be designed as a paraboloid with a single focal point, since, when using an ellipsoidal contour, the rays from the second virtual focal point diverge into the one
  • Rotation ellipsoid sections would. Furthermore, the radiation sources are arranged tilted on a truncated cone and thus to the concave mirror. However, the tilting point away from the virtual focal point of the convex concave mirror, resulting in a dull tilt angle of over 180 °. A tilting of the Rotationsellipsoidenabête or their longitudinal planes with respect to the sectional plane of the paraboloidal concave mirror is not taught. Likewise, all components of the reflector radiator are shown only individually and schematically, a connecting them housing, which has further Verapatician is not disclosed.
  • the curved central concave mirror is formed from any hollow body having concave mirror surfaces with at least one focal point in the sectional plane.
  • the boundary surfaces of the ellipsoidal rotation sections and of the central concave mirror of the known reflector emitter can be mirrored for reflection of unused radiation not radiated into the main emission direction, but not the aperture.
  • the common ground plane can be mirrored. However, since this runs parallel to the cross-sectional plane of the aperture, results from such
  • the object of the present invention is therefore to be seen to provide such a development of the known reflector emitter, with the efficiency in the generation of a directed in a main direction of radiation beam can be further increased by simple means.
  • the solution according to the invention for this task can be found in the main claim.
  • Advantageous developments of the reflector radiator according to the invention are shown in the subclaims and are explained in more detail below in connection with the invention.
  • the reflector radiator is inventively characterized in that the longitudinal sectional plane of the ellipsoidal rotation sections and the sectional plane of the concave mirror in dependence on the radiation characteristic of the radiation sources at the same or different tilt angle between 0 ° and 90 ° in
  • Focus of the concave mirror are arranged to each other. Furthermore, the aperture of a first ring reflector and the concave mirror are surrounded by a second ring reflector adjoining its cutting plane in the direction of the aperture as further inner mirroring.
  • the course of the walls of the first and second annular reflector is designed so that incident beams are reflected in the main emission direction of the reflector emitter or in the region of the focal point of the concave mirror.
  • the inventive tilting of the ellipsoid of revolution to the concave mirror different optical characteristics of the radiation sources can be used more efficiently. In this case, the underlying radiation characteristic of the radiation source used must be taken into account for optimum adaptation.
  • each Rotationsellipso- idenabitess invention By tilting each Rotationsellipso- idenabitess invention the environment of the concave mirror is segmented. Each segment comprises an ellipsoidal section of revolution.
  • the tilt angle can be the same for all Rotationsboloidenabitese, in particular if the associated radiation sources have the same emission characteristics. If this is not the case, each rotational ellipsoid section can be tilted at a different tilt angle to the central concave mirror.
  • the rays impinging on the ellipsoidal sections of revolution are projected into the central concave mirror in an angle which is much more favorable than that of an untilted arrangement.
  • the tilt angle between the longitudinal sectional planes of the ellipsoidal rotation sections and the sectional plane of the concave mirror is between 20 ° and 45 °.
  • Particularly favorable for the efficiency is a tilt angle between 25 ° and 40 °.
  • the radiation sources may also be arranged inclined and preferably also inclined in the tilted spheroidal ellipsoid sections.
  • the radiation sources depending on the radiation characteristic to the sectional plane of the concave mirror at the same or different inclination angles between 0 ° and 80 °, preferably between 10 ° and 45 °, in particular be inclined by 35 °.
  • the same inclination angle for radiation sources with the same emission characteristic and different inclination angles for radiation sources with different emission characteristics can again be selected.
  • the aforementioned preferred tilt and inclination angles apply in particular to light-emitting diodes which are preferably and advantageously used in the invention as radiation sources with a conical emission characteristic of +/- 60 ° from the central emission axis.
  • the radiation sources are tilted in the invention under acute ( ⁇ 90 °) tilt angles to the cutting plane of the concave mirror.
  • the concave mirror can be advantageously and preferably paraboloidally, spherically or ellipsoidally or formed in a linearly extended form thereof. In a spherical concave mirror, any point within the sphere but outside the center can
  • Be focal point (rays that pass through the center as a focal point, are reflected back into).
  • Focus is in the sectional plane of the sphere to form the spherical shell.
  • the curvatures mentioned results in a
  • Focal line as a connecting line of the foci of the basic shape.
  • linearly extended form is understood to mean the shaping when the paraboloidal, spherical or ellipsoidal basic shape is cut open along a central axis and evenly linear extension pieces are inserted in order to form a trough-shaped form whose curves parabolic, spherical or ellipsoidal.
  • a central concave mirror also with variable eccentricity in the case of paraboloidal or ellipsoidal cross-section
  • Concave mirrors can also be designed to be relatively small in space, since only small portions of the complete paraboloid, sphere or ellipsoid shape are used. Furthermore, it is possible to produce in such a concave mirror by choosing its shape as ellipsoid another focal point, which can then be placed in a convenient location. All light rays from the central concave mirror converge around this point. This is particularly advantageous for lens systems and results in parallel that only a relatively small aperture is needed.
  • the shape of the concave mirror can in turn be selected depending on the emission characteristics of the radiation sources used, but also on the selected tilt and tilt angles.
  • a particularly high yield results if, in the case of an ellipsoidal concave mirror, the second focal point located outside the concave mirror is preferred and advantageous within the aperture or above the aperture outside the reflector radiator.
  • the second focal line lying outside the concave mirror advantageously lies in the aperture, which then likewise has a linearly extended form.
  • An optimal light output also results when the total amount of light emitted is coupled into the main emission direction of the reflector emitter.
  • a central emission axis or, in the case of a solid shape thereof, a central emission surface of the concave mirror is aligned in the main emission direction. Further details on the central emission axis or the central emission surfaces of the individual curvature forms can be found in the exemplary embodiments.
  • the main radiation direction of the radiation source is chosen so that it is perpendicular to the plane, with respect to the
  • All possible radiation angles are covered in the invention by additional mirror surfaces, which ensure that the radiation predominantly collimates the reflector radiator and leaves it parallel in the direction of the main emission direction. It is for a first ring reflector provided surrounding the aperture. A particularly favorable coupling of hitherto unused marginal rays in the main emission direction of the reflector radiator is obtained if, preferably and advantageously, at least the first ring reflector has a paraboloidal wall profile, the focal point lying in the aperture.
  • mirrored end faces of special shape in the form of the second ring reflector are integrated in the invention in the interior of the reflector radiator, which deflect a portion of these unused beams in the central concave mirror, which then couples these in the main emission.
  • the second ring reflector at least partially has a parabolic or ellipsoidal wall profile, wherein the focal point is in the range of lying within the concave mirror focal point. It can be made of manufacturing technology
  • the wall course at least in sections (in particular in the field of paraboloid or ellipsoidal course) from a plurality of straight, angularly abutting surfaces is composed.
  • the second ring reflector with an at least partially parabolic or ellipsoidal wall profile radiation in particular for a LED beam angle of 65 ° to 70 ° can be used much better. It has already been stated above that adaptations to the emission characteristics of the radiation sources used lead to an optimized luminous efficacy. This also applies to the shaping of the second ring reflector in its course in the radial plane to the main emission direction. Therefore, the second ring reflector may have a cross-sectional profile having ellipsoidal bulges corresponding to the number of light sources present.
  • the reflector emitter according to the invention can also be increased in terms of its emission efficiency by constructive optimizations.
  • the aperture is smaller than the rotational ellipse section.
  • the cross section of the aperture at the smallest point may be smaller than half the cross section of the ellipsoid of revolution, measured between the body edges.
  • a sharply focused combined beam in the main emission direction requires only a small aperture to exit.
  • a central concave mirror with an ellipsoidal shape, the second focal point can be placed in the aperture, favors a small aperture.
  • the advantage of a small aperture is the possibility of large-dimensioned ellipsoidal sections, which can thus project a large part of the radiation in the direction of the central concave mirror.
  • the efficiency is further increased and the small blind stretch in the center of the projection is smaller.
  • the efficiency can be increased even further by the maximum utilization of the central concave mirror (beam path optimization).
  • a preferred ratio is formed with a model scaling factor of 0 , 5 to 10 and is dependent on the radiation characteristic of the radiation sources, the scaling factor of 2 is preferred.
  • the reflector emitter according to the invention can be used, for example, for signaling systems or for medical lights, as headlights for vehicles or for off-shore systems or generally for underwater use, for example for immersion lamp heads.
  • the reflector emitter according to the invention is designed in several parts, wherein in a three-part design in a shell the Rotationsellipsoidenabête, the aperture and the first ring reflector, in a central part recesses for the radiation sources and the second ring reflector and in a lower part of the concave mirrors are arranged.
  • middle and lower part can be combined to form a common part.
  • the reflector radiator can advantageously and preferably have a cover part with a transparent cover for the aperture. For further collimation of the generated beam, it is advantageous and
  • the transparent cover has a beam-modifying optics, for example a Fresnel structure or plano-convex lenses with a smooth edge or concave-convex glasses.
  • a beam-modifying optics for example a Fresnel structure or plano-convex lenses with a smooth edge or concave-convex glasses.
  • further optical lenses may be provided for additional beam focusing.
  • lid, upper, middle and lower part are pressure-tightly connected to each other, for example by screw with sealing inserts.
  • halogen lamps, fluorescent lamps, UV lamps or light-emitting diodes (LED) can advantageously and preferably be used as radiation sources in the reflector emitter according to the invention.
  • electromagnetic rays mainly light rays, are reflected and concentrated.
  • Light emitting diodes have a higher light output than incandescent lamps, they are less hot and have a significantly longer life. They may be formed in one or more colors and have a conical radiation characteristic of +/- 60 ° from the central emission axis. However, the luminance of the LEDs is much lower than that of incandescent lamps, and thus the use of several less faint lamps in a common reflector emitter according to the invention is established. Further details can be found in the embodiments explained below.
  • FIG. 1 shows an overall perspective view of the reflector emitter
  • FIG. 2A is a side view of the reflector radiator
  • FIG. 2B shows a longitudinal section through the reflector radiator
  • FIG. 2C shows a detail in the region of the second ring reflector
  • Figure 3 is a longitudinal section through the individual components of
  • 4A is a side view of the upper part of the reflector radiator
  • FIG. 4B shows an interior view of the upper part of the reflector radiator
  • FIG. 4C is a plan view of the upper part
  • FIG. 4D shows a longitudinal section through the upper part
  • 5A is an interior view of the central part of the reflector radiator
  • FIG. 5B shows a longitudinal section through the central part
  • FIG. 6A shows an interior view of the lower part of the reflector radiator
  • Figure 6B is a longitudinal section through the lower part with spherical
  • Figure 6C is a longitudinal section through the lower part with paraboloidal
  • Figure 6D is a longitudinal section through the lower part with ellipsoidal
  • FIG. 7 shows the beam path in the reflector radiator.
  • FIG. 1 shows an overall perspective view of the reflector emitter 01 according to the invention.
  • a cover part 02 an upper part 03, a middle part 04 and a lower part 05 of the reflector radiator 01.
  • five evenly around the central concave mirror arranged round ellipsoidal sections are provided, resulting in the Middle part 04 gives the pentagonal shape.
  • the representation of five Rotationsellipsoidenabêten is only exemplary, equally can also be two, three, four, six, seven to n Rotationsellipsoidenabête be provided, the width thereof decreases.
  • Embodiments with five, six or seven rotational ellipsoid sections are therefore to be preferred.
  • FIG. 2A shows a longitudinal section through the reflector radiator 01 along BB according to FIG. 2A. Shown is an axial Hauptabstrahlraum 07, which coincides in the selected embodiment with the central axis of the reflector 01 radiator. Differently oriented main emission directions, which fall through an aperture 08, are also readily realizable.
  • Upper part 03, middle part 04 and lower part 05 together form a combined reflector 09. This consists in the selected embodiment of five Rotationsellipsoidenabête 10, each having an opening 11.
  • the formation geometry of each ellipsoidal section 10 is shown in FIG.
  • the combined reflector 09 consists of a central concave mirror 12 in the lower part 05 of the reflector radiator 01. Furthermore, recesses 13 are shown in the middle part 04 with openings 06 for attachment.
  • a radiation source for example an LED, is arranged in each recess 3 with a radiation direction in the direction of the rotational ellipse sections 10.
  • a first ring reflector 15 with a mirrored paraboloid wall profile 34 is arranged around the aperture 09.
  • a second ring reflector 16 is arranged above the cutting plane 17 of the central concave mirror 12.
  • the second ring reflector 16 also has an approximately at least partially paraboloidal (or even ellipsoidal) wall profile 34, the focal point 44 being at the focal point 30 of the Concave mirror 12 or at least in its range.
  • Both the first ring reflector 15 and the second ring reflector 16 are formed in the embodiment shown by mirrored walls 14 in the interior of the reflector radiator 01.
  • the wall course shown in the embodiment is shown in detail. For a simplified manufacturability is the
  • Wall course of the second ring reflector 16 composed of a plurality of straight surfaces 18, which connect the obtuse angles (indicated with x °, y °, z °) to each other.
  • FIG. 3 shows the sectional view according to FIG. 2B of the reflector radiator 01 from cover part 02, upper part 03, middle part 04 and lower part 05.
  • Mirror surfaces 20 of the rotational ellipse sections 10 in FIG. 3 shows the sectional view according to FIG. 2B of the reflector radiator 01 from cover part 02, upper part 03, middle part 04 and lower part 05.
  • the central concave mirror 12 has an opening 19.
  • a transparent cover 45 shown in phantom
  • the transparent cover 45 of the pressure seal and has in the selected embodiment, the beam collimated bundled light beam additionally collimating Fresnel 46 ,
  • FIG. 4A shows the top part 03 of the ring reflector 01 in a side view
  • FIG. 4B shows the inside view.
  • the five mirror surfaces 20 of the Rotationsellpsoidenabête 10 which are arranged uniformly around the aperture 08 to recognize.
  • FIG. 4C shows a plan view of the upper part 03.
  • the section EE according to FIG. 4C is represented by the upper part 03.
  • the parabola can penetrate into the aperture 08 at different depths.
  • the vertex of the parabola is at a distance y from the vertex of the rotational ellipse section 10, so that the parabola has a penetration depth z into the aperture 08.
  • Each rotational ellipsoid section 10 is formed from an ellipsoid of revolution 23 which is cut in a longitudinal section plane 26 extending through both focal points 24, 25 and in a cross-sectional plane 28 extending perpendicularly between its center 27 and one of its focal points 24, 25 (preferably 25).
  • the rotary ellipse section 10 has a large radius R1 and a small radius R2. Between the center 27 and one of the focal points 24, 25 is the distance v.
  • the longitudinal sectional plane 26 is inclined to the cutting plane 17 by n ° in the acute tilt angle 29.
  • the focal point 25 of the rotary ellipse section 10 is at the same time the focal point 30 of the central concave mirror 12.
  • FIG. 5A shows the middle part 04 of the reflector emitter 01 in the interior view. To recognize five recesses 13, each with two openings 06 for fixing the radiation sources.
  • FIG. 5B shows the section JJ according to FIG. 5A. In the exemplary embodiment shown, the recesses 13 and thus the LEDs (or other radiation sources) are pointed by n °
  • the focal point 30 is removed by the distance s from a central arrangement of the LED in the recesses 13.
  • the distance from the recess 13 to the tip of the LED measures the distance t.
  • FIG. 6A shows an inside view of the lower part 05 of the reflector radiator 01 with the central concave mirror 12. This can be designed to be spherical, paraboloidal or ellipsoidal in cross section.
  • Fig. 6B is a spherical one
  • the central emission axis 33 of the spherical concave mirror 12 extends through the focal point 30 of the circle 35 and is perpendicular to the section plane 17 through the circle 35.
  • the focal point 30 is at R / 2. It can lie between 0 and R and is defined as the point of intersection of the section plane 17 with the radius R.
  • FIG. 6C shows the section with a paraboloid concave mirror 12
  • Section plane 17 has the distance u from the vertex of the parabola 36. In this case, u is at the same time the distance to the focal point 30.
  • the central emission axis 33 of the paraboloidal concave mirror 12 extends through the selected focal point 30
  • FIG. 6D shows the section with an ellipsoidal concave mirror 12.
  • the ellipse 37 has the large radius R1 and the small radius R2.
  • the distance of the center point 38 from the cutting plane 17 measures the distance q.
  • the central emission axis 33 runs through the center point 38 and is perpendicular to the section plane 17 or runs through the two focal points 30, 39 of the ellipse 37.
  • the central emission axis 33 is generally congruent with the main emission direction 07 (see FIG. 2B) However, special applications may require angle deviations
  • the concave mirror 12 which can be embodied in various cross-sectional shapes is always shown in the exemplary embodiments with a circular cross-section in the other plane. Likewise, however, solid shapes of the different cross sections in the other plane are possible.
  • the respective one-dimensional Ab- beam axis through the focal point is then only extended to the two-dimensional emission surface with the same orientation with a corresponding focal line.
  • At the reflection ratios in the reflector emitter 01 nothing changes.
  • Extracted forms of the central concave mirror are particularly advantageous in the case of a larger number of radiation sources and therefore of ellipsoidal sections for reasons of arrangement (compare also the closest DE 10 2006 044 019 B4 to the invention).
  • the beam path in the reflector emitter 01 is shown according to the invention with tilted by the tilt angle 29 Rotationsellipsoidenabroughen 10, the first ring reflector 15 and the second ring reflector 16 at the section BB in FIG 2B. It can clearly be seen that no light beam emanating from the radiation source 40 leaves the reflector emitter 01 directly through the aperture 08, so that in particular otherwise unused, diffuse marginal rays are coupled into the main emission direction 07 (cf. FIG. 2B). In a first emission angle region 41, the rays are guided by the associated ellipsoidal rotation section 10 into the central concave mirror 12 and from there through the focal point 30 through the aperture 08.
  • a second emission angle range 42 the rays are guided by the first ring reflector 15 through the aperture 08.
  • a third emission angle range 43 the rays are guided by the second ring reflector 16 into the central concave mirror 12 and from there through the aperture 08.
  • the emission area of the radiation source 40 is utilized to at least 80%. The remaining 20% are directed as diffuse radiation through the aperture 08 and do not necessarily contribute to the main emission direction 07.
  • the data apply to a radiation source 40 with an ideal hemispherical radiation below 180 °.
  • first beam angle range for 12
  • second beam angle range for 15
  • third beam angle range for 16

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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)

Abstract

On connaît un projecteur à réflecteur qui concentre des rayons de plusieurs sources de rayonnement plus faibles en un faisceau commun intense au moyen de segments d'ellipsoïdes de rotation métallisés et d'un miroir concave central, dont les foyers coïncident. Dans cette construction, les rayons marginaux incidents ne sont pas utilisés de façon optimale. Dans le projecteur à réflecteur (01) selon l'invention, on obtient un accroissement du rendement par un désalignement des segments d'ellipsoïdes de rotation (10) par rapport au miroir concave central (12) ainsi que par l'utilisation d'un premier réflecteur annulaire (15) placé dans l'ouverture (08) et d'un second réflecteur annulaire (16) placé directement au-dessus du miroir concave (12), qui réfléchissent tous deux dans la direction de rayonnement principal (07) ou en direction du miroir concave (12). Grâce au désalignement, on obtient un meilleur rayonnement incident, en particulier en fonction de la caractéristique de rayonnement des sources de rayonnement utilisées (40), par exemple des DEL. Aucun rayon ne sort directement du projecteur à réflecteur (01) à travers l'ouverture (08) mais seulement après une réflexion (41, 42, 43) sur le miroir concave (12) ou sur le premier ou le second réflecteur annulaire (15, 16), selon son angle. Le projecteur à réflecteur (01) peut être utilisé, par exemple, dans les installations de signalisation, les lampes à usage médical ou les lampes à ultraviolets, ou encore comme projecteur pour les véhicules ou pour les installations en mer, et aussi en particulier dans les activités sous-marines.
EP13706910.0A 2012-02-10 2013-01-19 Projecteur à réflecteur Not-in-force EP2812629B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102012003071.1A DE102012003071B4 (de) 2012-02-10 2012-02-10 Reflektorstrahler
PCT/DE2013/000044 WO2013117178A1 (fr) 2012-02-10 2013-01-19 Projecteur à réflecteur

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EP2812629A1 true EP2812629A1 (fr) 2014-12-17
EP2812629B1 EP2812629B1 (fr) 2015-12-30

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EP3431868A1 (fr) * 2017-07-21 2019-01-23 Philips Lighting Holding B.V. Dispositif d'éclairage catadioptrique
EP4215802A4 (fr) * 2020-09-21 2024-11-13 Suzhou Opple Lighting Co., Ltd. Système de source de lumière d'un appareil d'éclairage, et appareil d'éclairage
CN113725343B (zh) * 2021-09-01 2024-08-30 深圳市佑明光电有限公司 一种高效深紫外led光源封装结构及其封装方法

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US1935729A (en) * 1931-03-27 1933-11-21 Gen Electric Beacon or searchlight
JPH1164795A (ja) * 1997-08-25 1999-03-05 Hitachi Ltd 照明装置及びこの照明装置を用いた投写型表示装置
US7513630B2 (en) * 2000-03-27 2009-04-07 Wavien, Inc. Compact dual ellipsoidal reflector (DER) system having two molded ellipsoidal modules such that a radiation receiving module reflects a portion of rays to an opening in the other module
FR2826098B1 (fr) 2001-06-14 2003-12-26 Valeo Vision Dispositif d'eclairage ou de signalisation, notamment pour vehicule, comportant plusieurs sources lumineuses
FR2861831B1 (fr) 2003-10-31 2006-01-20 Valeo Vision Module d'eclairage pour projecteur de vehicule
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WO2013117178A1 (fr) 2013-08-15
EP2812629B1 (fr) 2015-12-30
DE102012003071B4 (de) 2014-11-20
DE102012003071A1 (de) 2013-08-14

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