EP0031556B1 - Illumination source for line scanning of a document - Google Patents

Illumination source for line scanning of a document Download PDF

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Publication number
EP0031556B1
EP0031556B1 EP80108040A EP80108040A EP0031556B1 EP 0031556 B1 EP0031556 B1 EP 0031556B1 EP 80108040 A EP80108040 A EP 80108040A EP 80108040 A EP80108040 A EP 80108040A EP 0031556 B1 EP0031556 B1 EP 0031556B1
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EP
European Patent Office
Prior art keywords
tube
document
source according
line
analysis
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
Application number
EP80108040A
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German (de)
French (fr)
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EP0031556A1 (en
Inventor
Gérard Biron
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.)
Alcatel CIT SA
Original Assignee
Compagnie Industrielle de Telecommunication CIT Alcatel SA
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Filing date
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Publication of EP0031556A1 publication Critical patent/EP0031556A1/en
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Publication of EP0031556B1 publication Critical patent/EP0031556B1/en
Expired legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/70—Lamps with low-pressure unconstricted discharge having a cold pressure < 400 Torr
    • H01J61/80—Lamps suitable only for intermittent operation, e.g. flash lamp

Definitions

  • the present invention relates to a light source for line-by-line analysis of a document in particular by a linear array of photodetectors, these photodetectors being in number equal to that of the image points of the line given by the desired definition of analysis. .
  • any system for analyzing a document line using a photodetector array requires uniform illumination of the document over the entire length of an analysis line.
  • a fluorescent tube slightly longer than the width of the document and used at a short distance from the document is used as the lighting source; the source can also be formed from two fluorescent tubes also of length slightly greater than the width of the document, these two tubes being arranged symmetrically on either side of the analysis zone, at a short distance from the document.
  • a reflector provided with a narrow slit along its entire length is associated with the tube so as to transversely restrict the dimen- s i ons of the beam incident on the document and / or prevent direct illumination of the strip of photodetectors from the tube.
  • the object of the present invention is to remedy these drawbacks in particular by making it possible, in particular, with scrolling at high continuous speed of the document, to allocate to the analysis time a time substantially equal to that of scrolling from one line to the next. 'other without affecting the results of analysis.
  • the subject of the present invention is a light source for line-by-line analysis of a document, constituted by a flash tube having an internal channel, the ends of which are respectively connected to two gas reserve chambers in which two electrodes are arranged. operation of the tube respectively, said tube being externally equipped with a priming electrode disposed between the two operating electrodes, characterized in that said inner channel is along the useful length of said tube intended to be opposite the document a capillary channel and that, over its useful length, said tube is thick-walled, the section of which is, on a portion facing the document, substantially V-shaped with rounded angle to form a magnifying glass incorporated in the wall of the tube.
  • the light source comprises a reflector on a part of the tube opposite to that forming a magnifying glass.
  • FIG. 1 there is illustrated a light source 1 of a document 2 to be analyzed line by line during its drive by a drive roller 3 carrying an end pinion 4 driven by a shaft pinion motor 5.
  • the light source 1 is connected to a supply circuit 6 having a control input 7.
  • the light source 1 is intended to illuminate the successive lines to be analyzed of the document, it belongs to a fac emitter -similar comprising, as is well known for the analysis of successive lines of the document, a linear array of photo-detectors, not shown, receiving the light beam returned by the lines successively illuminated by the source.
  • the source 1 illustrated in FIGS. 1 to 3 is a flash tube also designated by the general reference 1, the internal channel for the gas, for example Xenon, to be ionized is a capillary channel 10.
  • This capillary channel is of substantially length equal to the width of document 2 and defines the useful part of the tube. Over the length of the capillary channel, the wall of the tube is of considerable thickness.
  • the capillary canal 10 is connected to two gas reserve chambers 11 and 12, respectively at the two ends of the tube.
  • the tube is further equipped with two operating electrodes 13 and 14 inside the gas reserve chambers respectively and with a priming electrode constituted by a metal spiral 15 which is wound around the tube in the vicinity of one of the electrodes and which extends to the vicinity of the other electrode by a metallized track, not visible here, deposited on the external surface of the tube.
  • the section of the tube over its useful length is substantially triangular, it has here the shape of an isosceles triangle whose angles are rounded and the sides rounded.
  • this section may be of different shape, it will in any case have a portion, referenced 16 in FIG. 3, delimited in V with rounded angle on the part of the tube intended to be opposite the document, to form a magnifying glass incorporated into the wall of the tube over its useful length.
  • the part of the tube opposite to that forming a magnifying glass can be semi-cylindrical.
  • the tube is further equipped on the part opposite to that forming a magnifying glass with a reflector 17, formed by a layer of white paint, on the external wall of the tube in this part.
  • the operating electrodes 13 and 14 and the ignition electrode 15 are connected to the supply circuit 6 supplying the operating voltage to the operating electrodes and the ignition voltage to the ignition electrode at each control signal on input 7.
  • This circuit 6 is of known type and is therefore not described here.
  • the control signal applied to input 7 is of rhythm defined by the rhythm of scrolling of the successive lines of the document to be analyzed.
  • This flash tube with capillary channel and incorporated magnifying glass forms a light source of small transverse dimension which can be placed at a short distance from the document to illuminate the successive lines to be analyzed, this promoting the uniformity of the illumination along each line, and which can provide the power necessary for the analysis of each of the lines by the photodetector array in a very short time.
  • this light source allows, thanks to its capillary channel, to adjust without too much excess the amount of gas between the electrodes to that which will be ionized, this to ensure the almost total ionization of the gas contained in the capillary channel and thus to favor the production of a uniform flash along the tube, therefore of the line to be analyzed.
  • the thick wall of the tube gives good mechanical resistance to the light source which, when mounted in an analysis device or facsimile transmitter, is subjected to vibrations and allows, opposite the analysis line, to play the role of magnifying glass incorporated in the tube to focus the light from the tube on the document line.
  • the capillary channel will be chosen with a diameter between 0.2 and 1 mm and preferably from 0.25 to 0.5 mm, for a vertical definition of 4 to 8 analysis points. to the millimeter, and the tube of larger transverse dimension reduced to 5 or 6 mm.
  • This source allows the analysis of a document driven continuously or step by step, at fixed or variable speed and in particular at very high speed: successive flashes triggered in correspondence providing sufficient lighting power in very short durations, the running time of successive lines in front of the source can be used almost entirely for the analysis of the content of these lines respectively.
  • the rapidity of the lighting of each of the successive lines of document makes it possible to form a fixed image of each of these lines on the linear bar of analysis, the bar. "sees” then each of the lines as being fixed.

Description

La présente invention concerne une source d'éclairage pour l'analyse ligne par ligne d'un document notamment par une barrette linéaire de photodétecteurs, ces photodétecteurs étant en nombre égal à celui des points image de la ligne donné par la définition souhaitée d'analyse.The present invention relates to a light source for line-by-line analysis of a document in particular by a linear array of photodetectors, these photodetectors being in number equal to that of the image points of the line given by the desired definition of analysis. .

Tout système d'analyse d'une ligne de document par une barrette de photodétecteurs nécessite un éclairement uniforme du document sur toute la longueur d'une ligne d'analyse. De manière courante, on utilise comme source d'éclairage un tube fluorescent de longueur légèrement supérieure à la largeur du document et disposé à faible distance du document; la source peut aussi être formée de deux tubes fluorescents également de longueur légèrement supérieuré à la largeur du document, ces deux tubes étant disposés symétriquement de part et d'autre de la zone d'analyse, à faible distance du document.Any system for analyzing a document line using a photodetector array requires uniform illumination of the document over the entire length of an analysis line. Currently, a fluorescent tube slightly longer than the width of the document and used at a short distance from the document is used as the lighting source; the source can also be formed from two fluorescent tubes also of length slightly greater than the width of the document, these two tubes being arranged symmetrically on either side of the analysis zone, at a short distance from the document.

Un réflecteur muni d'une fente étroite sur toute sa longueur est associé au tube de manière à limiter transversalement les dimen- sions du faisceau tombant sur le document et/ou éviter un éclairement direct de la barrette de photodétecteurs à partir du tube.A reflector provided with a narrow slit along its entire length is associated with the tube so as to transversely restrict the dimen- s i ons of the beam incident on the document and / or prevent direct illumination of the strip of photodetectors from the tube.

Notamment dans des systèmes à grande vitesse et à définition élevée, correspondant par exemple au défilement de chacune des lignes successives d'analyse de 125,um de hauteur en 1 ms environ et à une définition de 8x8 points d'image au millimètre carré, l'analyse doit être faite sur un document défilant en continu. En effet, les caractéristiques des systèmes mécaniques d'entraînement actuels ne permettent pas dans ces conditions un arrêt sur les lignes successives du document pour l'analyse de ces lignes. Cependant avec un défilement à vitesse continue du document, les sources d'éclairage telles que celles citées ci-avant ne permettent pas une précision d'analyse suffisante des lignes successives. En effet, pour obtenir une analyse suffisamment précise des lignes avec un défilement à vitesse continue, ou est tenu d'effectuer l'analyse en un temps nettement inférieur à celui affecté au défilement d'une ligne à l'autre, au jDoins 10 fois inférieur, ceci conduit alors pour la définition élevée donnée, à un temps d'analyse, extrêmement faible, incompatible avec la fréquence maximale de fonctionnement des barrettes de photodétecteurs actuelles.In particular in high speed and high definition systems, corresponding for example to the scrolling of each of the successive analysis lines of 125 μm in height in approximately 1 ms and to a definition of 8 × 8 image points per square millimeter, l analysis must be done on a continuously scrolling document. Indeed, the characteristics of the current mechanical drive systems do not allow under these conditions a stop on the successive lines of the document for the analysis of these lines. However, with scrolling at a continuous speed of the document, the light sources such as those mentioned above do not allow sufficient analysis precision of the successive lines. Indeed, to obtain a sufficiently precise analysis of the lines with a scrolling at continuous speed, or is required to perform the analysis in a time significantly less than that allocated to scrolling from one line to another, at d D oins 10 times lower, this then leads, for the high definition given, to an extremely low analysis time, incompatible with the maximum operating frequency of the current photodetector arrays.

La présente invention a pour but de remédier notamment à ces inconvénients en permettant, en particulier, avec un défilement à vitesse continue élevée du document, d'affecter au temps d'analyse un temps sensiblement égal à celui de défilement d'une ligne à l'autre sans pour autant que les résultants d'analyse en soient affectés.The object of the present invention is to remedy these drawbacks in particular by making it possible, in particular, with scrolling at high continuous speed of the document, to allocate to the analysis time a time substantially equal to that of scrolling from one line to the next. 'other without affecting the results of analysis.

La présente invention a pour objet une source d'éclairage pour analyse ligne par ligne d'un document, constituée par un tube éclairs présentant un canal intérieur dont les extrémités sont reliées respectivement à deux chambres de réserve de gaz dans lesquelles sont disposées deux électrodes de fonctionnement du tube respectivement, ledit tube étant équipé extérieurement d'une électrode d'amorçage disposée entre les deux électrodes de fonctionnement, caractérisée en ce que ledit canal intérieur est sur la longueur utile dudit tube destinée à être en regard du document un canal capillaire et que, sur sa longueur utile, ledit tube est à paroi épaisse dont la section est, sur un portion en regard du document, sensiblement en forme de V à angle arrondi pour former loupe incorporée dans la paroi du tube.The subject of the present invention is a light source for line-by-line analysis of a document, constituted by a flash tube having an internal channel, the ends of which are respectively connected to two gas reserve chambers in which two electrodes are arranged. operation of the tube respectively, said tube being externally equipped with a priming electrode disposed between the two operating electrodes, characterized in that said inner channel is along the useful length of said tube intended to be opposite the document a capillary channel and that, over its useful length, said tube is thick-walled, the section of which is, on a portion facing the document, substantially V-shaped with rounded angle to form a magnifying glass incorporated in the wall of the tube.

Selon une autre caractéristique de l'invention, la source d'éclairage comporte un réflecteur sur une partie du tube opposée à celle formant loupe.According to another characteristic of the invention, the light source comprises a reflector on a part of the tube opposite to that forming a magnifying glass.

Les caractéristiques et avantages de la présente invention apparaîtront plus clairement au cours de la description d'un exemple de réalisation donné dans le dessin ci-annexé dans lequel:

  • - la figure 1 est un vue schématique en perspective de la source d'éclairage d'un document à analyser, selon l'invention,
  • - la figure 2 est une vue en élévation d'une partie d'extrémité de la source d'éclairage de la figure 1, à échelle agrandie,
  • - la figure 3 est une vue en coupe selon la ligne III-111 de la figure 2, à échelle très agrandie, de la source d'éclairage.
The characteristics and advantages of the present invention will appear more clearly during the description of an exemplary embodiment given in the attached drawing in which:
  • FIG. 1 is a schematic perspective view of the light source of a document to be analyzed, according to the invention,
  • FIG. 2 is an elevation view of an end portion of the lighting source of FIG. 1, on an enlarged scale,
  • - Figure 3 is a sectional view along line III-111 of Figure 2, on a greatly enlarged scale, of the light source.

Dans la figure 1, on a illustré une source d'éclairage 1 d'un document 2 à analyser ligne par ligne au cours de son entraînement par un rouleau d'entraînement 3 portant un pignon d'extrémité 4 attaqué par un pignon d'arbre moteur 5. La source d'éclairage 1 est reliée à un circuit d'alimentation 6 présentant une entrée de commande 7. La source d'éclairage 1 est destinée à éclairer les lignes successives à analyser du document, elle appartient à un émetteur de fac-similé comportant, ainsi qu'il est bien connu pour l'analyse des lignes successives du document, une barrette linéaire de photo-détecteurs, non représentée, recevant le faisceau lumineux renvoyé par les lignes successivement éclairées par la source.In Figure 1, there is illustrated a light source 1 of a document 2 to be analyzed line by line during its drive by a drive roller 3 carrying an end pinion 4 driven by a shaft pinion motor 5. The light source 1 is connected to a supply circuit 6 having a control input 7. The light source 1 is intended to illuminate the successive lines to be analyzed of the document, it belongs to a fac emitter -similar comprising, as is well known for the analysis of successive lines of the document, a linear array of photo-detectors, not shown, receiving the light beam returned by the lines successively illuminated by the source.

La source 1 illustrée dans les figures 1 à 3 est un tube à éclairs désigné également par la référence générale 1 dont le canal intérieur pour le gaz, par exemple du Xénon, à ioniser est un canal capillaire 10. Ce canal capillaire est de longueur sensiblement égale à la largeur du document 2 et définit la partie utile du tube. Sur la longueur du canal capillaire la paroi du tube est d'épaisseur importante. La canal capillaire 10 est relié à deux chambres de réserve de gaz 11 et 12, respectivement aux deux extrémités du tube. Le tube est en outre équipé de deux électrodes de fonctionnement 13 et 14 intérieures aux chambres de réserve de gaz respectivement et d'une électrode d'amorçage constituée par une spirale métallique 15 qui est enroulée autour du tube au voisinage de l'une des électrodes et qui se prolonge jusqu'au voisinage de l'autre électrode par une piste métallisée, non visible ici, déposée sur la surface externe du tube.The source 1 illustrated in FIGS. 1 to 3 is a flash tube also designated by the general reference 1, the internal channel for the gas, for example Xenon, to be ionized is a capillary channel 10. This capillary channel is of substantially length equal to the width of document 2 and defines the useful part of the tube. Over the length of the capillary channel, the wall of the tube is of considerable thickness. The capillary canal 10 is connected to two gas reserve chambers 11 and 12, respectively at the two ends of the tube. The tube is further equipped with two operating electrodes 13 and 14 inside the gas reserve chambers respectively and with a priming electrode constituted by a metal spiral 15 which is wound around the tube in the vicinity of one of the electrodes and which extends to the vicinity of the other electrode by a metallized track, not visible here, deposited on the external surface of the tube.

Ainsi qu'il apparaît dans la figure 3, la section du tube sur sa longueur utile est sensiblement triangulaire, elle a ici la forme d'un triangle isocèle dont les angles sont arrondis et les côtés bombés.As it appears in FIG. 3, the section of the tube over its useful length is substantially triangular, it has here the shape of an isosceles triangle whose angles are rounded and the sides rounded.

On comprendra, bien que non illustré, que cette section peut être de forme différente, elle présentera de toute manière une portion, référencée 16 dans -la figure 3, délimitée en V à angle arrondi sur la partie du tube destinée à être en regard du document, pour former loupe incorporée dans la paroi du tube sur sa longueur utile. Ainsi la partie du tube opposée à celle formant loupe peut être semi-cylindrique.It will be understood, although not illustrated, that this section may be of different shape, it will in any case have a portion, referenced 16 in FIG. 3, delimited in V with rounded angle on the part of the tube intended to be opposite the document, to form a magnifying glass incorporated into the wall of the tube over its useful length. Thus the part of the tube opposite to that forming a magnifying glass can be semi-cylindrical.

Le tube est en outre équipé sur la partie opposée à celle formant loupe d'un réflecteur 17, formé par une couche de peinture blanche, sur la paroi extérieure du tube en cette partie.The tube is further equipped on the part opposite to that forming a magnifying glass with a reflector 17, formed by a layer of white paint, on the external wall of the tube in this part.

Les électrodes de fonctionnement 13 et 14 et l'électrode d'amorçage 15 sont reliées au circuit d'alimentation 6 fournissant la tension de fonctionnement aux électrodes de fonctionnement et la tension d'amorçage à l'électrode d'amorçage à chaque signal de commande sur l'entrée 7. Ce circuit 6 est de type connu et n'est donc pas décrit ici. Le signal de commande appliqué à l'entrée 7 est de rythme défini par le rythme de défilement des lignes successives du document à analyser.The operating electrodes 13 and 14 and the ignition electrode 15 are connected to the supply circuit 6 supplying the operating voltage to the operating electrodes and the ignition voltage to the ignition electrode at each control signal on input 7. This circuit 6 is of known type and is therefore not described here. The control signal applied to input 7 is of rhythm defined by the rhythm of scrolling of the successive lines of the document to be analyzed.

Ce tube à éclairs à canal capillaire et à loupe incorporée forme une source d'éclairage de faible dimension transversale qui peut être placée à faible distance du document pour éclairer les lignes successives à analyser, ceci favorisant l'uniformité de l'éclairement le long de chaque ligne, et qui peut fournir la puissance nécessaire pour l'analyse de chacune des lignes par la barette de photodétecteurs en un temps très bref. De plus, pour une énergie électrique utilise donnée à laquelle correspond l'ionisation d'une certaine quantité de gaz, cette source d'éclairage permet, grâce à son canal capillaire, d'adjuster sans trop d'excès la quantité de gaz entre les électrodes à celle qui sera ionisée, ceci pour assurer l'ionisation quasi- totale du gaz renfermé dans le canal capillaire et ainsi favoriser la production d'un éclair uniforme le long du tube, donc de la ligne à analyser.This flash tube with capillary channel and incorporated magnifying glass forms a light source of small transverse dimension which can be placed at a short distance from the document to illuminate the successive lines to be analyzed, this promoting the uniformity of the illumination along each line, and which can provide the power necessary for the analysis of each of the lines by the photodetector array in a very short time. In addition, for a given electrical energy use which corresponds to the ionization of a certain amount of gas, this light source allows, thanks to its capillary channel, to adjust without too much excess the amount of gas between the electrodes to that which will be ionized, this to ensure the almost total ionization of the gas contained in the capillary channel and thus to favor the production of a uniform flash along the tube, therefore of the line to be analyzed.

La paroi épaisse du tube confère une bonne résistance mécanique à la source d'éclairage qui, montée dans un dispositif d'analyse ou émetteur de fac-similé, est soumise à des vibrations et permet en regard de la ligne d'analyse de jouer le rôle de loupe incorporée au tube pour concentrer la lumière issue du tube sur la ligne de document.The thick wall of the tube gives good mechanical resistance to the light source which, when mounted in an analysis device or facsimile transmitter, is subjected to vibrations and allows, opposite the analysis line, to play the role of magnifying glass incorporated in the tube to focus the light from the tube on the document line.

En pratique, pour la source d'éclairage, le canal capillaire sera choisi de diamètre compris entre 0,2 et 1 mm et de préférence de 0,25 à 0,5 mm, pour une définition verticale de 4 à 8 points d'analyse au millimètre, et le tube de plus grande dimension transversale réduite à 5 ou 6 mm.In practice, for the light source, the capillary channel will be chosen with a diameter between 0.2 and 1 mm and preferably from 0.25 to 0.5 mm, for a vertical definition of 4 to 8 analysis points. to the millimeter, and the tube of larger transverse dimension reduced to 5 or 6 mm.

Cette source permet l'analyse d'un document entraîné en continu ou pas à pas, à vitesse fixe ou variable et en particulier à très grande vitesse: les éclairs successifs déclenchés en correspondance fournissant la puissance d'éclairage suffisante en des durées très brèves, le temps de défilement des lignes successives devant la source peut être exploité en quasi-totalité pour l'analyse du contenu de ces lignes respectivement. De plus indépendamment du mode d'entraînement pas à pas ou en continu, la rapidité de l'éclairage de chacune des lignes successives de document, permet de former une image fixe de chacune de ces lignes sur la barrette linéaire d'analyse, la barrette "voit" alors chacune des lignes comme étant fixes.This source allows the analysis of a document driven continuously or step by step, at fixed or variable speed and in particular at very high speed: successive flashes triggered in correspondence providing sufficient lighting power in very short durations, the running time of successive lines in front of the source can be used almost entirely for the analysis of the content of these lines respectively. In addition, independently of the step-by-step or continuous drive mode, the rapidity of the lighting of each of the successive lines of document, makes it possible to form a fixed image of each of these lines on the linear bar of analysis, the bar. "sees" then each of the lines as being fixed.

Claims (6)

1. A light source for scanning a document line-by-line, constituted by a flash tube presenting an inner channel, the ends of which are connected respectively to two gas storage chambers in which are disposed two operating electrodes respectively of the tube, said tube being equipped on the outside with a priming electrode disposed between the two operating electrodes, characterized in that said inner channel is a capillary channel (10) over the useful length of said tube (1) destined to face the document, and that, over the useful length, said tube is a thick-walled tube, the section of which is, for a portion (16) facing the document, substantially formed as a V with a rounded angle in order to form a magnifying glass built into the wall of the tube.
2. A source according to claim 1, characterized in that it comprises a reflector (17) on a part of the tube (1) which is opposite to that which forms a magnifying glass.
3. A source according to claim 2, characterized in that said reflector (17) is constituted by a deposit of white substance on the outer wall of the tube.
4. A source according to one of the claims 1 to 3, characterized in that said tube (1) has a cross-section which is substantially triangular.
5. A source according to one of the claims 1 to 4, characterized in that said capillary channel (10) has a transversal dimension which lies between 0,1 and 1 mm.
6. A source according to claim 5, characterized in that said capillary channel (10) has preferably a transversal dimension which lies between 0,25 and 0,5 mm.
EP80108040A 1979-12-27 1980-12-19 Illumination source for line scanning of a document Expired EP0031556B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR7931746 1979-12-27
FR7931746A FR2472833A1 (en) 1979-12-27 1979-12-27 LIGHTING SOURCE FOR LINE-BY-LINE ANALYSIS OF A DOCUMENT

Publications (2)

Publication Number Publication Date
EP0031556A1 EP0031556A1 (en) 1981-07-08
EP0031556B1 true EP0031556B1 (en) 1983-06-29

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Application Number Title Priority Date Filing Date
EP80108040A Expired EP0031556B1 (en) 1979-12-27 1980-12-19 Illumination source for line scanning of a document

Country Status (5)

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EP (1) EP0031556B1 (en)
CA (1) CA1162969A (en)
DE (1) DE3063996D1 (en)
FR (1) FR2472833A1 (en)
IE (1) IE50763B1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8800632U1 (en) * 1988-01-20 1989-05-18 Heimann Gmbh, 6200 Wiesbaden, De

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2284046A (en) * 1939-11-21 1942-05-26 Doane Products Corp Fluorescent lamp
FR2050868A5 (en) * 1969-06-27 1971-04-02 Meyer Yves
FR2139860A1 (en) * 1971-04-28 1973-01-12 Multiblitz Mannesmann Gmbh Co
FR2150908A1 (en) * 1971-08-28 1973-04-13 Philips Nv

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2284046A (en) * 1939-11-21 1942-05-26 Doane Products Corp Fluorescent lamp
FR2050868A5 (en) * 1969-06-27 1971-04-02 Meyer Yves
FR2139860A1 (en) * 1971-04-28 1973-01-12 Multiblitz Mannesmann Gmbh Co
FR2150908A1 (en) * 1971-08-28 1973-04-13 Philips Nv

Also Published As

Publication number Publication date
IE50763B1 (en) 1986-07-09
DE3063996D1 (en) 1983-08-04
EP0031556A1 (en) 1981-07-08
FR2472833B1 (en) 1982-09-03
CA1162969A (en) 1984-02-28
FR2472833A1 (en) 1981-07-03
IE802724L (en) 1981-06-27

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