EP1809943A1 - Procede d'eclairage - Google Patents

Procede d'eclairage

Info

Publication number
EP1809943A1
EP1809943A1 EP05796067A EP05796067A EP1809943A1 EP 1809943 A1 EP1809943 A1 EP 1809943A1 EP 05796067 A EP05796067 A EP 05796067A EP 05796067 A EP05796067 A EP 05796067A EP 1809943 A1 EP1809943 A1 EP 1809943A1
Authority
EP
European Patent Office
Prior art keywords
light
array
target surface
donors
cone
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.)
Withdrawn
Application number
EP05796067A
Other languages
German (de)
English (en)
Inventor
Karsten Splitthof
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.)
Dantec Dynamics GmbH
Original Assignee
Dantec Dynamics GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Dantec Dynamics GmbH filed Critical Dantec Dynamics GmbH
Publication of EP1809943A1 publication Critical patent/EP1809943A1/fr
Withdrawn legal-status Critical Current

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
    • F21V14/00—Controlling the distribution of the light emitted by adjustment of elements
    • F21V14/04—Controlling the distribution of the light emitted by adjustment of elements by movement of reflectors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S2/00—Systems of lighting devices, not provided for in main groups F21S4/00 - F21S10/00 or F21S19/00, e.g. of modular construction
    • 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
    • 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
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/84—Systems specially adapted for particular applications
    • G01N21/88—Investigating the presence of flaws or contamination
    • G01N21/8806—Specially adapted optical and illumination features
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V21/00—Supporting, suspending, or attaching arrangements for lighting devices; Hand grips
    • F21V21/14—Adjustable mountings
    • F21V21/30—Pivoted housings or frames
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2131/00—Use or application of lighting devices or systems not provided for in codes F21W2102/00-F21W2121/00
    • F21W2131/20—Lighting for medical use
    • F21W2131/205—Lighting for medical use for operating theatres
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]

Definitions

  • the invention relates to a lighting method and to a lighting fixture for carrying out this method, as well as to a measuring method which works by means of this lighting.
  • a target area For many optical processes, it is necessary for a target area to be illuminated as uniformly as possible, ie for the irradiance to be uniform over the entire target area, ie for a given desired value only to have certain permissible deviations or within a target value corridor.
  • the requirement for the uniformity of the illumination is particularly high when the illumination is used in the context of an optically based measurement method, such as, for example, the optical, non-destructive, planar Measuring method according to the correlation principle, for example according to the speckle correlation or the image correlation.
  • an optically based measurement method such as, for example, the optical, non-destructive, planar Measuring method according to the correlation principle, for example according to the speckle correlation or the image correlation.
  • luminaires which have a large number of light sources, in particular light sources, arranged in a grid next to one another, which direct their light cones next to one another and usually aim at each other in an overlapping manner onto the target area.
  • the light intensity is not uniform, in particular more similar to a Gaussian distribution, which, at least quantitatively, changes with the distance from the light donor with the square of the distance, and often qualitatively, This is a very uniform irradiance on a target area, which in a z. B. predetermined distance and a predetermined angular position to such a light donor array is only very roughly reach.
  • the uniform irradiance - preferably within predetermined limits - on the relative to the light donors defined Zielflä ⁇ surface is reached, in which the light donors relative to each other and / or relative to the target surface are positioned and aligned so that the sum of the individual light donors Irradiation levels (Licht ⁇ spots) generated on the target surface, in particular their superimpositions, lead to the desired uniform result.
  • the target surface may be a plane or a curved surface.
  • the light donors lie on a convex to the target surface curved array surface in which they are mounted at different distances to the main plane of the array Grundkörpes.
  • a light donor in particular on such an array, serve either even light-generating light sources or optical elements, in particular mirrors, prisms, etc., which are mounted in particular on the array and by one or more, spaced therefrom and also housed separately from the array, light sources are irradiated can, and forward the light in the direction of the target surface für ⁇ , in particular by deflection and / or bundling or scattering.
  • one or more scattering optical elements in particular a lens, may be arranged.
  • LEDs light-emitting diodes
  • the corresponding mirror may also be curved.
  • the orientation of the light cone emitted from the individual light emitters in the direction of the target surface or, if appropriate, also light cylinders, etc. determines the illumination result and, above all, the uniformity of the irradiation intensity over the entire target surface, in addition to the distance of the individual light dispensers from the target surface usually can not be achieved without simple or even multiple overlap of the light spots generated by the light donors on the target surface.
  • the individual light sources in particular LED's, may in each case be subdivided. assume different angular position with respect to the body and also under ⁇ different distance thereof.
  • the light sources when used directly on the array, they are fixed in a different but firmly fixed angular position and spacing on the base body, so that in particular they define an array surface curved convexly in the direction of the target surface. Subsequently, this no longer changeable array must be positioned in the correct relative position (distance and angle position) relative to the desired target surface.
  • the uniformity of the irradiance for reasons of control at several points of the target area, and also optionally at intervals in succession, be measured, however, is to change the result then only the change in the relative position of the entire array relative to the target surface possible.
  • optical elements are used as light donors on the array
  • each optical element located on the array can be driven very quickly and easily from the outside, and receive their illumination by one or more light sources spaced from the array, preferably also outside the array.
  • each optical element can be irradiated by a separate light source, in particular a separate LED, or several optical elements can be irradiated together by a single light source.
  • a strongly focused light source such as a laser
  • whose light is not applied simultaneously to the individual optical elements of the array, but rather in rapid succession, with this change being rapid enough in order not to cause any irritation with respect to the sensor scanning the target surface and / or the evaluation method used.
  • the light spots generated by the individual optical elements on the target surface are not static - relative to the array - but by Bere ⁇ movement of the optical element can cover a larger area in a very short time.
  • the uniformity of the irradiation intensity, in particular in the overlapping area of light spots, can be improved, on the other hand, with a reduced number of optical elements as a light donor - with otherwise unchanged parameters - and
  • the orientation of the individual light donors can still be changed during the illumination, by changing the orientation and / or position of the optical elements on the array relative to the array Basic body, if a review of the irradiance on the Zielflä ⁇ che a subsequent optimization may be necessary.
  • the relative positioning of the entire array relative to the target surface can be changed.
  • the relative positioning, ie angular position and / or distance, of the individual light dispenser can be changed to the target surface or to the part of the target surface to be irradiated by this light dispenser:
  • the cell thickness distribution within the light patch remains qualitatively the same, but decreases quantitatively.
  • the distance between the light source and the target surface can be changed by changing the corresponding distance of the light source to the main body of the array, or in the reflector (if present) associated with the actual light source in its distance and / or its angular position relative to the light source and / or to the main body of the array is changed.
  • optical elements such as mirrors on the array - in extreme cases, only a single optical elements, such as a single mirror can be used instead of a whole array, if the sweeping of the entire target area successively fast enough is possible - this optical element in turn, in its angular position and / or its distance from the target surface, for example by changing the angular position and / or the distance to the main body of the array to be changed.
  • the change in angle preferably takes place by pivoting around two pivot axes which are at an angle to one another and which preferably extend in each case parallel to the main plane of the main body of the array.
  • the light donors are arranged to achieve a simple design preferably in auf ⁇ mutually perpendicular rows and columns (X and Y direction) along the main plane of the main body of the array, but define a curved array surface which is convexly bent towards the target surface.
  • the light donors are arranged such that the light spots generated on the target surface, in particular adjacent light spots, overlap one another and, in particular, multiple overlaps of light spots are deliberately set.
  • the light spots In order to illuminate the edge areas of the target area as well, the light spots generally go far beyond the edge of the target area.
  • the above-mentioned design of the array makes possible an illumination method for a target area by means of a light-dispensing array in which a uniform irradiance is continuously achieved over the entire target area by the optical and / or geometric parameters of the light dispensers, in particular of the entire Arrays are adjusted in relation to the target surface so that the desired uniform irradiance over the entire target surface results.
  • the individual light donors are not fastened on a flat surface of the array but at different distances from the main body and the conical axes of their light cones are aligned with the main body, that is, with respect to the storage space defined target surface, the individual light spots of these Lichtke ⁇ gel in sum, in particular by one or multiple overlap, taking into account the irradiance distribution in the interior of a single Licht ⁇ stain a uniform irradiance on the target surface er ⁇ enough.
  • the irradiance on the target surface at a plurality of points is measured and from this result, an optimization of the optical and / or geometric parameters, in particular the angular positions of the Ke ⁇ gelachsen, relative to the main body of the array, determined and set in particular automatically.
  • the distances of the light donors of the main body, so the main level of the array can be adjusted automatically depending on it.
  • the irradiance in the area of the corners or outer edges of the target area and / or control points which are outside the actual target area at a defined distance are determined and the irradiance of the vertices relative to one another and / or those of the control points relative to one another and / or those of the vertices compared to those of the control points.
  • Figure 4 different light dispenser.
  • Figures 1 show a lighting situation according to the invention in perspective view (Figure 1a) and two-dimensional in the side view ( Figure 1 b).
  • a precisely defined target surface 3 usually a section on the surface of a target object 3 ', should be evenly illuminated by the light donor array 1, ie with the same irradiance at each point of the target surface 3.
  • FIG. 1 b additionally shows the CCD sensor 11, which receives the illuminated target area 3 for carrying out an optical measuring method, and which is not shown in FIG. 1 a for reasons of clarity.
  • the light donor array 1 consists of a base body 1 b with a flat bottom as the main plane V, on the front side of several light donors 2, preferably direct light generating light sources 4a, b, ... are arranged. However, these are not at equal distance to the main plane 8 1 1 son ⁇ countries with such different distances 8a, b, ... that these light sources 4a b, an array surface 1 defining the convexly curved with respect to the main level V is.
  • the light sources 4a, b are preferably LEDs, and are arranged on the surface 1a in mutually perpendicular rows X1, X2,..., And columns Y1, Y2,.
  • the individual light sources 4 emit light cones 6 in the direction of the target surface 3, and produce there light spots 7, which - as best seen in FIGS. 2 - usually partially overlap one another and thereby illuminate the entire target surface 3.
  • the array 1 illuminates an area on the object 3 'that is larger than the target area 3, while the CCD sensor 11 is usually adjusted so that it is exactly the target area 3 scans.
  • Figure 1a shows - the array 1 and / or the sensor 11 is not necessarily set with their main planes parallel to the target surface 3, which, moreover, does not have to be a flat surface, but may well have a Wöl ⁇ exercise.
  • FIG. 2 shows, in plan view of the target surface 3, the light spots 7, 8,... Superimposed there, which are produced on the target surface 3 by the light donor array 1 according to FIGS. In this case, only part of the target surface 3 is shown in FIGS.
  • FIG. 2a shows how the light spots arranged in a row X1, X2,..., For example 7a-c and 7d-f, overlap one another as well as in the transverse direction, ie between the individual rows X1 and X2. This results also overlaps of more than two light spots at individual points of the target surface 3.
  • FIG. 3a shows the individual curves 14a-c the irradiance distribution within such a light spot, for example 7a, as it is exclusively caused by the generating light cone 6a.
  • the cumulative curve as illustrated in FIG. 3b only for one line through the target area 1, can also be transmitted across all such lines two-dimensionally over the
  • the target surface 3 can be adjusted so that at each point of the target surface 3 there is an irradiation intensity E which, for example, moves within the predetermined limit values according to FIG.
  • the influencing possibilities of a single curve 14a are shown in FIG. 4a for a single light source 4 which, like the other light sources, is fastened on or in the base body 1b of the array 1.
  • the array 1 is in this case in a defined distance and angle position to the target object 3 'and thus the target surface 3.
  • a lateral displacement of the light spot 7 is obtained by changing the angular position of the light cone 6 to the target surface 3, best represented by the angular position of the cone axis 10 to the target surface 3, for example by pivoting the angular position of the light source 4 and / or its reflector 15 rela ⁇ tive to the main body 1 of the array. 1
  • a pure pivoting also increases the distance between the light source 4 or the reflector 15 and the target surface 3, so that a curve E3 results which is not only offset laterally with respect to the output curve, but is also wider and flatter.
  • this also changes the contour of the light spot, which is circular when perpendicular to the target surface 3 incident cone axis 6 and the cone axis 6 rotations ⁇ symmetrical reflector 15 is increasingly elliptical or egg-shaped with increasing deviation from this basic position.
  • This contour change is also used selectively for equalizing the irradiance over the entire target area 3.
  • the directions of the conical axes 6a, b of the individual light sources 4a, b of an array 1 can be arranged in a targeted manner in more or less or in one of the directions not at all overlapping rows X1, X2, as shown in FIG.
  • FIG. 2 c shows a solution which is formed symmetrically to the two transverse axes by the illuminated area. so that the respective transverse axes of the light spots from these central axes are becoming increasingly larger outwards.
  • Which and if a regular arrangement of the light spots on the target surface is the optimal arrangement can be determined empirically, but also automatically, for example with the aid of a computer-assisted optimization program.
  • the irradiance E must be measured at specific points of the target surface 3, as partially drawn in FIGS. 2a and 2b, and the value of the irradiance, preferably automatically, be passed on to the optimization program, which then - in the As a rule, starting from one of the basic arrangements according to FIGS. 2a-d, an optimization is carried out by changes in the individual positions of the light spots.
  • corner points 13 are recommended as measuring points, inter alia, in the case of the generally rectangular target surface 3, or at least measuring points which are offset slightly inwards from these corner points 13a, b.
  • control points 12a, b which lie outside the target surface 3, preferably radially outside the corner points 13a, b, are recommended as measuring points.
  • FIG. 4b shows an array 1 in which light sources 2 are not light sources, but optical light which does not generate any light but only passes light on.
  • table elements such as mirror 5 are used.
  • the mirrors 5a, b are irradiated by one or more light sources 4a, b, which are located away from the actual array 1 and can be fixed on the main body 1b of the array.
  • this Licht ⁇ source 4a especially if it is such a light source, the highly concentrated light, such as a laser beam, emits, be pivotable about at least one spatial axis x and / or y.
  • microspi- gel can be used, or other miniaturization of the optical elements, which are very small and light and therefore easy to drive, and - ein ⁇ finally their drive - are manufactured as high-volume parts low, since they already today in optical Devices are used.
  • micromirrors can still be moved in a controlled manner relative to the array 1 during the ongoing illumination or the measurement method illustrated in FIG.
  • the entire target area or a relatively large subarea of the target area can be irradiated one after the other in rapid succession so that this can be done for the intended optical measuring method. ren - even taking into account the inertia of the CCD sensor and its Be ⁇ exposure time - is acceptable.
  • the mirrors 5 a, b, ... are Draink ⁇ bar for this purpose by at least two mutually transverse spatial axes with respect to the main body 1 b of the array 1.
  • a scattering plate 9 are arranged, as indicated in Figure 4a, which is partially transparent to the light of the light sources 4 and in the direction on the target surface 3, the light scatters streaks ker.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

L'invention concerne des procédés de mesure optiques surfaciques. Dans le cas de ces procédés, la qualité du résultat de mesure dépend notamment de l'uniformité de l'intensité de rayonnement sur l'ensemble de la surface de mesure. L'invention vise à obtenir une grande uniformité. A cet effet, on utilise un réseau (1) comportant plusieurs diodes (4) qui sont placées dessus à différentes distances du plan principal du réseau et leur position angulaire étant ajustée.
EP05796067A 2004-10-11 2005-10-11 Procede d'eclairage Withdrawn EP1809943A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004049493 2004-10-11
PCT/EP2005/010939 WO2006040133A1 (fr) 2004-10-11 2005-10-11 Procede d'eclairage

Publications (1)

Publication Number Publication Date
EP1809943A1 true EP1809943A1 (fr) 2007-07-25

Family

ID=35500894

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05796067A Withdrawn EP1809943A1 (fr) 2004-10-11 2005-10-11 Procede d'eclairage

Country Status (2)

Country Link
EP (1) EP1809943A1 (fr)
WO (1) WO2006040133A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008142621A1 (fr) * 2007-05-21 2008-11-27 Philips Intellectual Property & Standards Gmbh Dispositif de projection de lumière comprenant un réseau de del
WO2009007927A1 (fr) * 2007-07-11 2009-01-15 Koninklijke Philips Electronics N.V. Procédé d'éclairage d'au moins une partie d'un espace et système d'éclairage destiné à être utilisé dans ce procédé
ITPR20070078A1 (it) * 2007-10-16 2009-04-17 Coemar Spa Proiettore per illuminazione di superfici e generazione di effetti luminosi

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1112253A (fr) * 1954-10-06 1956-03-12 Anciens Ets Barbier éclairage simultané de deux champs opératoires
JPS5225032B2 (fr) * 1972-10-07 1977-07-05
DE19826729C2 (de) * 1998-06-16 2000-06-15 Klaus Bagusat Reflektoranordnung mit einer Anzahl von Reflektoren
DE20002092U1 (de) * 2000-02-05 2000-05-18 Docter Optics Gmbh Beleuchtungsvorrichtung für einen Arbeitsplatz
EP1363065A1 (fr) * 2002-05-14 2003-11-19 ERCO Leuchten GmbH Dispositif d'éclairage de bâtiments et procédé pour la simulation de la distribution de la lumière à la surface d'un bâtiment
FR2849160B1 (fr) * 2002-12-24 2005-03-18 Alm Dispositif d'eclairage et son utilisation

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2006040133A1 *

Also Published As

Publication number Publication date
WO2006040133A1 (fr) 2006-04-20

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