CH284201A

CH284201A - Photoelectric cell.

Info

Publication number: CH284201A
Authority: CH
Inventors: L Electronique Moderne Limitee
Original assignee: Electronique Moderne Societe A
Priority date: 1948-12-07
Filing date: 1949-12-01
Publication date: 1952-07-15
Also published as: NL84382C

Description

Cellule photo-eleetrique. 0n connait des cellules photo-electriques se composant dune anode centrale et dune cathode p@riplierique qui, reliees respectivement aux p6les dune source de courant continu, donnent naissance ä un courant electrique d'intensite variable, proportionnelle ä 1'intensite du fais- ceau lumineux qui tombe sur la cathode, et qui peut etre amplifiee ä 1'aide dune ou de plu- sieurs lampes ä electrodes multiples. Photoelectric cell. We know of photoelectric cells consisting of a central anode and a peripheral cathode which, respectively connected to the poles of a direct current source, give rise to an electric current of variable intensity, proportional to the intensity of the beam. light which falls on the cathode, and which can be amplified using one or more lamps with multiple electrodes.

0 n connait eg alement des cel lules photo-elec- triques dites uh multiplicateur d'electrons et qui comportent plusieurs anodes situees en general les unes derriere les autres et portees ä des potentiell progressivement Croissants au fur et ä, mesure que 1'on s'ecarte de la cathode, cha- que anode jouant 1e Ale de recepteur d'electrons par rapport ä 1'anode qui la precede et de gene- rateur d'eleetrons vis-ä-vis de 1'anode qui la suit. We also know of photoelectric cells called an electron multiplier and which comprise several anodes generally located one behind the other and brought to progressively increasing potentials as one s separated from the cathode, each anode acting as an electron receiver with respect to the anode which precedes it and as an electron generator with respect to the anode which follows it.

Si 1'on fait abstraction de 1'influence de la Couleur de la lumiere, toutes Ces cellules con- nues emettent un courant dependant unique- ment de la quantite de lumiere regue et sensible- ment proportionnel ä cette quantite de lumiere, les cellules ä anodes multiples ne fournissant qu'un courant amplifie par rapport ä celui fourni par les cellules ä anode simple. Cette circons- tance limite les possibilites d'utilisation des cellules connues. If we disregard the influence of the color of the light, all these known cells emit a current depending solely on the quantity of light received and substantially proportional to this quantity of light, the cells at multiple anodes providing only an amplified current compared to that provided by single anode cells. This circumstance limits the possibilities of using the known cells.

Le presente invention a pour objet une cel- lule photo-electrique dort 1'utilisation n'est pas limitee ä la traduction de variations quantita tives de la lumiere projetee sur la catliode. Elle est caracterisee en ce qu'elle comporte une ca- thode plane et au moins une paire d'anodes rec- tilignes, deux ä deux paralleles et situees dans un plan parallele ä la cathode. The present invention relates to a photoelectric cell whose use is not limited to the translation of quantitative variations of the light projected on the catliode. It is characterized in that it comprises a planar cathode and at least one pair of rectilinear anodes, two by two parallel and situated in a plane parallel to the cathode.

0n verra que des cellules de ce genre peu vent etre montees de faqon qu'elles fournissent un courant dependant par exemple de la Posi tion d'un faiscea.u lumineux irradiant seulement une petite Partie de la cathode ou bien de la Polarisation d'un faisceau lumineux irradiant toute cette cathode. It will be seen that cells of this kind can be mounted in such a way that they provide a current depending, for example, on the position of a light beam irradiating only a small part of the cathode or else on the polarization of a light beam radiating all this cathode.

Deux modes d'execution de la cellule photo- eleetrique selon 1'invention sont representes ä titre d'exemples au dessin annexe dann lequel: la fig. 1 est une vue schematique montrant un montage dune cellule photo-electrique ä deux anodes, la fig. 2 represente ce meme montage dune fa@on un peu plus detaillee et la fig. 3 montre schematiquement un mon- tage dune cellule ä quatre electrodes, deux ä deux paralleles, perpendiculaires entre elles et reliees par paires. Two embodiments of the photoelectric cell according to the invention are represented by way of examples in the appended drawing in which: FIG. 1 is a schematic view showing an assembly of a photoelectric cell with two anodes, FIG. 2 represents this same assembly in a slightly more detailed fashion and FIG. 3 schematically shows an assembly of a cell with four electrodes, two by two parallel, perpendicular to each other and connected in pairs.

En se reportant ä laRTI ID="0001.0269" WI="5" HE="4" LX="1442" LY="1826"> fig. 1, a1 et a2 repre- sentent, en plan, deux anodes rectilignes dis- posees parallelement ä une cathode plane C, les electrodes etant reliees respectivement aux pöles dune source 8 de courant continu. Referring to RTI ID="0001.0269" WI="5" HE="4" LX="1442" LY="1826"> fig. 1, a1 and a2 represent, in plan, two rectilinear anodes arranged parallel to a planar cathode C, the electrodes being respectively connected to the poles of a direct current source 8.

Si Fon projette sur 1a cathode sofft un spot, sofft une bande lumineuse x parallele aux anodes, 1'intensite du courant qui traverse chacune des anodes est fonction de la distance qui la separe du point x. La difMrence des intensites des cou- rants elementaires qui parcourent respective- ment les enroulements A etB permet de tra- duire ä chaque instant la variation de Position du faisceau lumineux qui irradie la petite Par tie x de la cathode. If Fon projects on the cathode sofft a spot, sofft a luminous band x parallel to the anodes, the intensity of the current which crosses each of the anodes is a function of the distance which separates it from the point x. The difference in the intensities of the elementary currents which respectively traverse the windings A and B makes it possible to translate at each instant the variation of Position of the light beam which irradiates the small part x of the cathode.

La fig. 2 represente ce meme montage com- plete en vue de la production d'un courant dif- ferentiel traduisant les variations de Position sur la cathode du spot produit par 1e faisceau lumineux F, Position qui peut par exemple etre commandee par un enregistrement sonore. La source S etant reunie au point median de 1'un des enroulements d'un transformateur T, 1e second enroulement peut etre relie, par exemple, ä un amplificateur A1 actionnant un haut-par- leur. fig. 2 represents this same complete assembly for the production of a differential current translating the variations of Position on the cathode of the spot produced by the light beam F, Position which can for example be controlled by a sound recording. The source S being joined to the midpoint of one of the windings of a transformer T, the second winding can be connected, for example, to an amplifier A1 driving a loudspeaker.

Dans 1e montage represente sch6matique- ment en elevation ä la fig. 3, les quatre anodes a1, a2, bi, b2, deux ä deux paralleles, s'etendent parallelement ä la cathode plane C et les anodes a1, a2, b1, b2 sont reliees respectivement ä Pentree A et ä la sortie B dune bobine. In the assembly shown schematically in elevation in FIG. 3, the four anodes a1, a2, bi, b2, two by two parallel, extend parallel to the planar cathode C and the anodes a1, a2, b1, b2 are connected respectively to the input A and at the output B of a coil.

L'experience montre que si la cathode C est irradiee partiellement ou totalement par un fais- ceau de lumiere polarisee lineairement, les cou- rants parcourant les demi-bobines dependent de la direction du plan de Polarisation. Pour la direction P de co plan, ces courants sont egaux (la cathode etant irradiee totalement), tandis que pour la direction P' de ce plan, 1e cou- rant en 0A est superieur ä celui enOB. La rotation du plan de Polarisation, due par exemple ä une cellule de Kerr, peut donc etre dece1ee par ce montage, par exemple dans un but ana- logue ä celui decrit en reference de la fig. 2. Les cellules decrites peuvent -eventuellement comporter en outre des multiplicateurs d'kec- trons. Experience shows that if the cathode C is partially or totally irradiated by a beam of linearly polarized light, the currents traversing the half-coils depend on the direction of the polarization plane. For the direction P of the co-plane, these currents are equal (the cathode being totally irradiated), while for the direction P' of this plane, the current in 0A is greater than that inOB. The rotation of the polarization plane, due for example to a Kerr cell, can therefore be detected by this assembly, for example for a purpose analogous to that described with reference to FIG. 2. The cells described may optionally also comprise kectron multipliers.

Claims

CLAIM Photoelectric cell, characterized in that it carries a flat cathode and at least one pair of rectilinear anodes, two, two parallel and located in a plane parallel to the cathode. SUB-CLAIM: Cell according to claim, characterized in that it comprises two pairs of mutually perpendicular anodes.