WO1993005590A1 - Device for optical transmission of data between different electronic circuits - Google Patents
Device for optical transmission of data between different electronic circuits Download PDFInfo
- Publication number
- WO1993005590A1 WO1993005590A1 PCT/FR1992/000839 FR9200839W WO9305590A1 WO 1993005590 A1 WO1993005590 A1 WO 1993005590A1 FR 9200839 W FR9200839 W FR 9200839W WO 9305590 A1 WO9305590 A1 WO 9305590A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- guide
- card
- beams
- optical
- cards
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/25—Arrangements specific to fibre transmission
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/42—Coupling light guides with opto-electronic elements
- G02B6/43—Arrangements comprising a plurality of opto-electronic elements and associated optical interconnections
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/80—Optical aspects relating to the use of optical transmission for specific applications, not provided for in groups H04B10/03 - H04B10/70, e.g. optical power feeding or optical transmission through water
- H04B10/801—Optical aspects relating to the use of optical transmission for specific applications, not provided for in groups H04B10/03 - H04B10/70, e.g. optical power feeding or optical transmission through water using optical interconnects, e.g. light coupled isolators, circuit board interconnections
- H04B10/803—Free space interconnects, e.g. between circuit boards or chips
Definitions
- the present invention relates to a device for transmitting information by optical means between different electronic circuits arranged on auxiliary cards extending from a main card of an electronic circuit box.
- each auxiliary card comprises optical connection means provided with means for transmitting and receiving optical beams of information.
- These devices also include means for transmitting information beams by optical means provided with complementary connection means opposite the card connection means, to ensure the transmission of optical beams between cards.
- the housings used to support the electronic circuits of any assembly generally comprise a rigid carcass and most often metallic.
- the part opposite to the front of this box is often used for fixing connectors for connecting the circuits of this box with the other components of the assembly in question.
- the lower part of this box is constituted by a main printed circuit board also called “motherboard”, on which are arranged connectors which allow to interconnect sub-assemblies of electronic circuits arranged in the box on printed circuit boards.
- auxiliary cards also called "daughter cards”. Different means of exchanging information between the different daughter cards have been devised in the state of the art.
- these exchanges are made by means of connectors and printed circuits fixed on the motherboard.
- the speed and capacity of information exchanges are such that the means described above are insufficient to ensure the proper functioning of the assembly. This is the case in particular for the assemblies used in the aeronautical industry but also in any industry where the acquisition and exchange of a very large number of information must be done very quickly and at very high speed.
- Means have also been developed in the prior art for transmitting information by optical means in the air.
- each daughter card has one or more means for transmitting optical information beams and one or more means for receiving beams. Information is then distributed either from one daughter card to all the other daughter cards, or in series from card to card.
- each coupler is connected to an optical fiber arranged for example in a loop.
- this structure has a large footprint below the motherboard, which is not always compatible with the space available, in particular for on-board assemblies.
- the object of the invention is therefore to solve these problems by proposing an information transmission device which is simple, reliable, as small as possible and whose cost price is as low as possible.
- the invention relates to a device for transmitting information by optical means between different electronic circuits arranged on auxiliary cards extending from a main card of an electronic circuit box.
- at least each auxiliary card comprises optical connection means provided with means for transmitting and receiving information beams, and comprising means for transmitting information beams between the cards, provided additional connection means opposite the card connection means, characterized in that the beam transmission means comprise a flat optical guide made of light-conducting dielectric material extending approximately parallel to the main card, opposite the transmission and reception means of each card to connect them together.
- FIG. 1 - Fig.l, 2 and 3 show devices for transmitting information by optical means of the prior art
- - Fig.4 schematically illustrates the operation of information transmission means according to the invention
- - Fig.5, ⁇ and 7 show different embodiments of an information transmission device according to the invention.
- FIG. 8 - Fig.8,9 and 10 show different embodiments of an optical guide forming part of a transmission device according to the invention.
- These cards include for example means 2 for transmitting an optical information beam in the direction of means 3 for receiving it, provided on the other daughter cards.
- FIGS. 2 and 3 another embodiment of means for transmitting information by optical means is shown, of the state of the art.
- This figure shows an information transmission device using optical fibers. for example 6, making it possible to connect daughter cards 7 to each other using an optical coupler 8, for example in a star shape.
- Each means of transmitting or receiving information from each daughter card is connected to an optical fiber and all the optical fibers are connected at the optical coupler to ensure the transmission of information between the different cards.
- These different elements are fixed on a motherboard 9.
- the information transmission device comprises means for transmitting optical beams between cards, which are in the form of a flat optical guide , designated by the general reference
- the planar optical guide is formed from dielectric material which conducts light, such as for example polymer.
- This optical guide comprises, opposite means for transmitting and receiving beams from each card, connection means comprising a portion of the input and output surface of the optical beams and a portion of deflection of these beams for deflecting the beams emanating from the transmission means of each card in the general direction of the guide and the beams propagating in the guide, towards the reception means of each card.
- the beams passing through the guide propagate in a direction parallel to the axis thereof between the different cards and at the level of each card and more particularly of the connection means of each of these, these beams are deviated at 90 ° in the example illustrated, to be directed to means for receiving these cards.
- the beams emitted by the emission means of each card are also deflected at 90 ° to propagate in a direction roughly parallel to the axis of the guide in the direction of the other cards.
- the deflection means consist of inclined planes, for example 10a and 10b, at 45 °, arranged opposite the means for transmitting and receiving each card as can be see it in Fig. 4.
- These inclined planes can be formed by the edges of notches or V-shaped grooves, or else of conical recesses with a circular or other base or pyramids with any polygonal base.
- Figs. 5,6 and 7 different positions of the guide 10 have been illustrated relative to a motherboard 12.
- the guide 10 is arranged under the motherboard 12 and this guide has portions 10c passing through this motherboard 12, a part of this guide projecting beyond this card to allow the optical connection of the guide and of means for transmitting and receiving bundles of cards.
- the guide comprises, facing the map, an inclined plane lOd used to deflect the optical beams emitted and received by this card, in order to connect it to other cards.
- connection means opposite each card.
- connection means can be constituted by inclined planes for example at 45 ° formed by the lateral sides of V-grooves whose tip is directed towards the cards, to connect these cards to each other.
- the surface portion of the guide facing the issuing and receiving means of each card can be curved to improve the transmission of the beams.
- FIGS. 8, 9 and 10 various forms of guide have been shown and it can be seen that this can have a star shape as shown in FIG. 8, that is to say that this guide comprises different branches to connect the different cards together, a loop shape as shown in Fig.9 or a straight shape as shown in Fig.10.
- the depths of the grooves or recesses may be different depending on their position in the guide to improve the transmission of information.
- these grooves or these recesses may have a decreasing depth the closer we get to the central part of the guide.
- This guide can for example be produced by molding and can be fixed on the motherboard, for example by gluing or integrated into the latter during its manufacture.
Abstract
The device for optical transmission of data between different electronic circuits disposed on auxiliairy cards (11) extending from a main card (12) of an electronic circuit housing, in which at least each auxiliairy card (11) includes means for optical coupling fitted with means for emitting and receiving data beams. The device comprises means for optically transmitting data beams between cards, provided with means for complementary coupling opposite the card coupling means. The data transmission device is characterized in that the means for transmitting beams comprise a plane optical guide (10) made of a light conducting dielectric material extending more or less parallel to the main card (12) opposite the emission and reception means of each card in order to connect the cards among themselves.
Description
Dispositif de transmission d'informations par voie optique entre différents circuits électroniques Device for transmitting information optically between different electronic circuits
La présente invention concerne un dispositif de transmission d'informations par voie optique entre diffé¬ rents circuits électroniques disposés sur des cartes auxiliaires s'étendant à partir d'une carte principale d'un boîtier de circuits électroniques.The present invention relates to a device for transmitting information by optical means between different electronic circuits arranged on auxiliary cards extending from a main card of an electronic circuit box.
On connaît déjà dans l'état de la technique différents dispositifs de transmission de ce type, dans lesquels au moins chaque carte auxiliaire comporte des moyens de connexion optique munis de moyens d'émission et de réception de faisceaux optiques d'informations. Ces dispositifs comportent également des moyens de transmis¬ sion des faisceaux d ' informations par voie optique munis de moyens de connexion complémentaires en regard des moyens de connexion des cartes, pour assurer la transmis- sion des faisceaux optiques entre cartes.There are already known in the prior art various transmission devices of this type, in which at least each auxiliary card comprises optical connection means provided with means for transmitting and receiving optical beams of information. These devices also include means for transmitting information beams by optical means provided with complementary connection means opposite the card connection means, to ensure the transmission of optical beams between cards.
Les boîtiers utilisés pour supporter les cir¬ cuits électroniques d'un ensemble quelconque comportent généralement une carcasse rigide et le plus souvent métallique. La partie opposée à la façade de ce boîtier est souvent utilisée pour la fixation de connecteurs de liaison des circuits de ce boîtier avec les autres compo¬ sants de l'ensemble considéré. La partie inférieure de ce boîtier est constituée par une carte de circuit imprimé principale également appelée "carte mère", sur laquelle sont disposés des connecteurs qui permettent de relier entre eux des sous-ensembles de circuits électroniques disposés dans le boîtier sur des circuits imprimés de cartes auxiliaires également appelées "cartes filles". Différents moyens d'échange d'informations entre les différentes cartes filles ont été imaginés dans l'état de la technique.The housings used to support the electronic circuits of any assembly generally comprise a rigid carcass and most often metallic. The part opposite to the front of this box is often used for fixing connectors for connecting the circuits of this box with the other components of the assembly in question. The lower part of this box is constituted by a main printed circuit board also called "motherboard", on which are arranged connectors which allow to interconnect sub-assemblies of electronic circuits arranged in the box on printed circuit boards. auxiliary cards also called "daughter cards". Different means of exchanging information between the different daughter cards have been devised in the state of the art.
C'est ainsi par exemple que ces échanges se font par 1 'intermédiaire de connecteurs et de circuits imprimés fixés sur la carte mère.
Cependant, dans les ensembles complexes, la vitesse et la capacité des échanges d'informations sont telles que les moyens décrits précédemment sont insuffi¬ sants pour assurer le bon fonctionnement de l'ensemble. Ceci est le cas en particulier pour les ensem¬ bles utilisés dans 1'industrie aéronautique mais également dans toute industrie où 1'acquisition et 1'échange d'un nombre très important d'informations doit se faire très rapidement et à très grand débit. On a également développé dans 1'état de la technique des moyens de transmission d'informations par voie optique dans l'air.Thus, for example, these exchanges are made by means of connectors and printed circuits fixed on the motherboard. However, in complex assemblies, the speed and capacity of information exchanges are such that the means described above are insufficient to ensure the proper functioning of the assembly. This is the case in particular for the assemblies used in the aeronautical industry but also in any industry where the acquisition and exchange of a very large number of information must be done very quickly and at very high speed. Means have also been developed in the prior art for transmitting information by optical means in the air.
Dans ce cas, chaque carte fille dispose d'un ou de plusieurs moyens d'émission de faisceaux optiques d'informations et d'un ou de plusieurs moyens de réception de faisceaux. La diffusion des informations se fait alors soit d'une carte fille à toutes les autres cartes filles, soit en série de carte à carte.In this case, each daughter card has one or more means for transmitting optical information beams and one or more means for receiving beams. Information is then distributed either from one daughter card to all the other daughter cards, or in series from card to card.
Cependant, les inconvénients de l'échange d'informations dans l'air sont multiples, car des obsta¬ cles imprévus comme des fumées, peuvent gêner ou empêcher la propagation des faisceaux optiques.However, the drawbacks of exchanging information in the air are manifold, since unforeseen obstacles such as smoke can hinder or prevent the propagation of optical beams.
Par ailleurs, des réflexions indésirables peuvent également introduire des informations parasites dans l'ensemble.Furthermore, unwanted reflections can also introduce spurious information into the whole.
On connaît également déjà dans 1'état de la technique des moyens d'échange d'informations qui utili¬ sent des fibres optiques et des coupleurs optiques, en étoile, ou individuels, pour chaque interface d'entrée- sortie des cartes filles.Also known in the prior art are information exchange means which use optical fibers and optical couplers, star, or individual, for each input-output interface of the daughter cards.
Dans ce cas, chaque coupleur est connecté à une fibre optique disposée par exemple en boucle.In this case, each coupler is connected to an optical fiber arranged for example in a loop.
Cependant, cette structure présente un encom¬ brement important au-dessous de la carte mère, ce qui
n'est pas toujours compatible avec l'espace disponible notamment pour les ensembles embarqués.However, this structure has a large footprint below the motherboard, which is not always compatible with the space available, in particular for on-board assemblies.
Le but de 1'invention est donc de résoudre ces problèmes en proposant un dispositif de transmission d'informations qui soit simple, fiable, le moins encom¬ brant possible et dont le prix de revient soit le plus faible possible.The object of the invention is therefore to solve these problems by proposing an information transmission device which is simple, reliable, as small as possible and whose cost price is as low as possible.
A cet effet, l'invention a pour objet un dispo¬ sitif de transmission d'informations par voie optique entre différents circuits électroniques disposés sur des cartes auxiliaires s'étendant à partir d'une carte princi¬ pale d'un boîtier de circuits électroniques, dans lequel au moins chaque carte auxiliaire comporte des moyens de connexion optique munis de moyens d'émission et de récep- tion de faisceaux d'informations, et comportant des moyens de transmission des faisceaux d'informations par voie optique entre les cartes, munis de moyens de connexion complémentaires en regard des moyens de connexion des cartes, caractérisé en ce que les moyens de transmission des faisceaux comprennent un guide optique plan en maté¬ riau diélectrique conducteur de la lumière s'étendant à peu près parallèlement à la carte principale, en regard des moyens d'émission et de réception de chaque carte pour raccorder celles-ci entre elles. L'invention sera mieux comprise à l'aide de la description qui va suivre, donnée uniquement à titre d'exemple et faite en se référant aux dessins annexés, sur lesquels :To this end, the invention relates to a device for transmitting information by optical means between different electronic circuits arranged on auxiliary cards extending from a main card of an electronic circuit box. , in which at least each auxiliary card comprises optical connection means provided with means for transmitting and receiving information beams, and comprising means for transmitting information beams between the cards, provided additional connection means opposite the card connection means, characterized in that the beam transmission means comprise a flat optical guide made of light-conducting dielectric material extending approximately parallel to the main card, opposite the transmission and reception means of each card to connect them together. The invention will be better understood with the aid of the description which follows, given solely by way of example and made with reference to the appended drawings, in which:
- les Fig.l, 2 et 3 représentent des dispositifs de transmission d'informations par voie optique de l'état de la technique;- Fig.l, 2 and 3 show devices for transmitting information by optical means of the prior art;
- la Fig.4 illustre schématiquement le fonction¬ nement de moyens de transmission d'informations selon 1'invention;
- les Fig.5, δ et 7 représentent différents modes de réalisation d'un dispositif de transmission d'informations selon l'invention; et- Fig.4 schematically illustrates the operation of information transmission means according to the invention; - Fig.5, δ and 7 show different embodiments of an information transmission device according to the invention; and
- les Fig.8,9 et 10 représentent différentes formes de réalisation d'un guide optique entrant dans la constitution d'un dispositif de transmission selon l'in¬ vention.- Fig.8,9 and 10 show different embodiments of an optical guide forming part of a transmission device according to the invention.
Ainsi qu'on peut le voir sur la Fig.1, il existe déjà dans l'état de la technique, des dispositifs de transmission d'informations par voie optique entre cartes filles désignées par la référence générale 1. Ces cartes comprennent par exemple des moyens 2 d'émission d'un faisceau optique d'information en direction de moyens 3 de réception de celui-ci, prévus sur les autres cartes filles.As can be seen in FIG. 1, there already exist in the state of the art, devices for transmitting information by optical means between daughter cards designated by the general reference 1. These cards include for example means 2 for transmitting an optical information beam in the direction of means 3 for receiving it, provided on the other daughter cards.
Ces différents moyens permettent de transmettre différents signaux entre les cartes et assurent donc 1'échange d'informations entre ces cartes. Ces cartes filles s'étendent à peu près perpendiculairement à partir d'une carte mère 4 et sont raccordées aux circuits de celle-ci par exemple par 1'intermédiaire de connecteurs électriques 5. Ces moyens sont décrits par exemple dans la revue " l'Onde Electrique" vol.70, n 6. Novembre, Décembre 1990. Ainsi qu'on lra décrit précédemment, ces moyens de transmission par voie optique dans 1' air présentent un certain nombre d'inconvénients.These different means make it possible to transmit different signals between the cards and therefore ensure the exchange of information between these cards. These daughter boards extend approximately perpendicularly from a mother board 4 and are connected to the circuits thereof, for example by means of electrical connectors 5. These means are described, for example, in the review "l ' Onde Electrique "vol.70, No. 6. November, December 1990. As the r previously described, these means of transmission by optical means 1 in air have a number of disadvantages.
Sur les Fig.2 et 3, on a représenté un autre mode de réalisation de moyens de transmission d'informa- tions par voie optique, de l'état de la technique. Sur cette figure, on reconnaît un dispositif de transmission d'informations utilisant des fibres optiques. par exemple 6, permettant de raccorder des cartes filles 7 entre elles grâce à un coupleur optique 8 par exemple en étoile.
Chaque moyen d'émission ou de réception d' infor¬ mations de chaque carte fille, est relié à une fibre optique et toutes les fibres optiques sont raccordées au niveau du coupleur optique pour assurer la transmission des informations entre les différentes cartes. Ces diffé¬ rents éléments sont fixés sur une carte mère 9.In FIGS. 2 and 3, another embodiment of means for transmitting information by optical means is shown, of the state of the art. This figure shows an information transmission device using optical fibers. for example 6, making it possible to connect daughter cards 7 to each other using an optical coupler 8, for example in a star shape. Each means of transmitting or receiving information from each daughter card is connected to an optical fiber and all the optical fibers are connected at the optical coupler to ensure the transmission of information between the different cards. These different elements are fixed on a motherboard 9.
Les différents inconvénients de ce type de dispositifs ont également été décrits précédemment.The various drawbacks of this type of device have also been described above.
Comme on peut le voir sur les figures 4,5 et 6, le dispositif de transmission d'informations selon l'in¬ vention comporte des moyens de transmission de faisceaux optiques entre cartes, qui se présentent sous la forme d'un guide optique plan, désigné par la référence généraleAs can be seen in FIGS. 4,5 and 6, the information transmission device according to the invention comprises means for transmitting optical beams between cards, which are in the form of a flat optical guide , designated by the general reference
10, s'étendant à peu près parallèlement à la carte princi- pale en regard de moyens d'émission et de réception de moyens de connexion de chaque carte auxiliaire par exemple10, extending roughly parallel to the main card opposite transmission and reception means for connection of each auxiliary card for example
11, pour raccorder celles-ci entre elles et permettre la- transmission des faisceaux optiques entre ces différentes cartes. Plus particulièrement, le guide optique plan est formé de matériau diélectrique conducteur de la lumière, comme par exemple en polymère. Ce guide optique comporte en regard des moyens d'émission et de réception de fais¬ ceaux de chaque carte, des moyens de connexion comprenant une portion de surface d'entrée et de sortie des faisceaux optiques et une portion de déviation de ces faisceaux pour dévier les faisceaux émanant des moyens d'émission de chaque carte dans la direction générale du guide et les faisceaux se propageant dans le guide, en direction des moyens de réception de chaque carte.11, to connect them together and allow the transmission of the optical beams between these different cards. More particularly, the planar optical guide is formed from dielectric material which conducts light, such as for example polymer. This optical guide comprises, opposite means for transmitting and receiving beams from each card, connection means comprising a portion of the input and output surface of the optical beams and a portion of deflection of these beams for deflecting the beams emanating from the transmission means of each card in the general direction of the guide and the beams propagating in the guide, towards the reception means of each card.
Ainsi, les faisceaux transitant dans le guide se propagent suivant une direction parallèle à 1 ' axe de celui-ci entre les différentes cartes et au niveau de chaque carte et plus particulièrement des moyens de connexion de chacune de celles-ci, ces faisceaux sont
déviés à 90° dans l'exemple illustré, pour être dirigés vers des moyens de réception de ces cartes. Les faisceaux émis par les moyens d'émission de chaque carte sont également déviés à 90° pour se propager dans une direction à peu près parallèle à 1'axe du guide en direction des autres cartes.Thus, the beams passing through the guide propagate in a direction parallel to the axis thereof between the different cards and at the level of each card and more particularly of the connection means of each of these, these beams are deviated at 90 ° in the example illustrated, to be directed to means for receiving these cards. The beams emitted by the emission means of each card are also deflected at 90 ° to propagate in a direction roughly parallel to the axis of the guide in the direction of the other cards.
Dans les différents modes de réalisation repré¬ sentés sur ces figures, les moyens de déviation sont constitués par des plans inclinés par exemple 10a et 10b, à 45°, ménagés en regard des moyens d'émission et de réception de chaque carte comme on peut le voir sur la Fig.4.In the various embodiments shown in these figures, the deflection means consist of inclined planes, for example 10a and 10b, at 45 °, arranged opposite the means for transmitting and receiving each card as can be see it in Fig. 4.
Ceci permet aux moyens d'émission et de récep¬ tion de chaque carte, d'émettre et de recevoir des fais- ceaux optiques dans et depuis le guide afin d'assurer un échange d'informations entre les différentes cartes.This allows the transmission and reception means of each card to transmit and receive optical beams in and from the guide in order to ensure an exchange of information between the various cards.
Ces plans inclinés peuvent être formés par les rebords d'encoches ou de rainures en V, ou encore d'évide- ments coniques à base circulaire ou autre ou pyramidaux à base polygonale quelconque.These inclined planes can be formed by the edges of notches or V-shaped grooves, or else of conical recesses with a circular or other base or pyramids with any polygonal base.
L'utilisation de ces évidements présente un certain nombre d'avantages par rapport aux encoches et aux rainures, car elle permet d'améliorer la qualité du couplage notamment en réception. Sur les Fig.5,6 et 7, on a illustré différentes positions du guide 10 par rapport à une carte mère 12. Sur la Fig.5, le guide 10 est disposé sous la carte mère 12 et ce guide comporte des portions 10c traversant cette carte mère 12, une partie de ce guide faisant saillie au-delà de cette carte pour permettre le raccordement optique du guide et des moyens d'émission et de réception de fais¬ ceaux des cartes.The use of these recesses has a certain number of advantages compared to the notches and the grooves, because it makes it possible to improve the quality of the coupling in particular in reception. In Figs. 5,6 and 7, different positions of the guide 10 have been illustrated relative to a motherboard 12. In Fig. 5, the guide 10 is arranged under the motherboard 12 and this guide has portions 10c passing through this motherboard 12, a part of this guide projecting beyond this card to allow the optical connection of the guide and of means for transmitting and receiving bundles of cards.
On constate également sur cette figure que le guide comporte en regard de la carte, un plan incliné lOd
permettant de dévier les faisceaux optiques émis et reçus par cette carte, afin de la raccorder aux autres cartes.It can also be seen in this figure that the guide comprises, facing the map, an inclined plane lOd used to deflect the optical beams emitted and received by this card, in order to connect it to other cards.
Sur les Fig.6 et 7, le guide optique 10 est disposé au-dessus de la carte mère 12 et comporte des moyens de raccordement en regard de chaque carte. Ces moyens de raccordement peuvent être constitués par des plans inclinés par exemple à 45° constitués par les pans latéraux de rainures en V dont la pointe est dirigée vers les cartes, pour raccorder ces cartes les unes aux autres. Selon un mode de réalisation particulier, la portion de surface du guide en regard des moyens d'émis¬ sion et de réception de chaque carte, peut être bombée pour améliorer la transmission des faisceaux.In Fig. 6 and 7, the optical guide 10 is arranged above the motherboard 12 and includes connection means opposite each card. These connection means can be constituted by inclined planes for example at 45 ° formed by the lateral sides of V-grooves whose tip is directed towards the cards, to connect these cards to each other. According to a particular embodiment, the surface portion of the guide facing the issuing and receiving means of each card can be curved to improve the transmission of the beams.
Sur les Fig.8, 9 et 10, on a représenté diffé- rentes formes de guide et on peut constater que celui-ci peut présenter une forme en étoile comme représenté sur la Fig.8, c'est à dire que ce guide comporte différentes branches permettant de raccorder les différentes cartes entre elles, une forme en boucle comme représentée sur la Fig.9 ou encore une forme rectiligne comme représentée sur la Fig.10.In FIGS. 8, 9 and 10, various forms of guide have been shown and it can be seen that this can have a star shape as shown in FIG. 8, that is to say that this guide comprises different branches to connect the different cards together, a loop shape as shown in Fig.9 or a straight shape as shown in Fig.10.
On notera également que les profondeurs des rainures ou des évidements peuvent être différentes en fonction de leur position dans le guide pour améliorer la transmission des informations. C'est ainsi par exemple que ces rainures ou ces évidements peuvent présenter une profondeur décroissante plus on se rapproche de la partie centrale du guide.It will also be noted that the depths of the grooves or recesses may be different depending on their position in the guide to improve the transmission of information. Thus, for example, these grooves or these recesses may have a decreasing depth the closer we get to the central part of the guide.
Ce guide peut par exemple être réalisé par moulage et peut être fixé sur la carte mère, par exemple par collage ou intégré dans celle-ci au cours de sa fabrication.
This guide can for example be produced by molding and can be fixed on the motherboard, for example by gluing or integrated into the latter during its manufacture.
Claims
REVENDICATIONS 1. Dispositif de transmission d'informations par voie optique entre différents circuits électroniques disposés sur des cartes auxiliaires (11) s'étendant à partir d'une carte principale (12) d'un boîtier de circuit électronique, dans lequel au moins chaque carte auxiliaire (11) comporte des moyens de connexion optique munis de moyens d'émission et de réception de faisceaux d'informa¬ tions, et comportant des moyens de transmission des faisceaux d'informations par voie optique entre les cartes, munis de moyens de connexion complémentaires en regard des moyens de connexion des cartes, caractérisé en ce que les moyens de transmission des faisceaux compren¬ nent un guide optique plan (10) en matériau diélectrique conducteur de la lumière, s'étendant à peu près parallèle¬ ment à la carte principale (12), en regard des moyens d'émission et de réception de chaque carte pour raccorder celles-ci entre elles. CLAIMS 1. Device for transmitting information optically between different electronic circuits arranged on auxiliary cards (11) extending from a main card (12) of an electronic circuit box, in which at least each auxiliary card (11) comprises optical connection means provided with means for transmitting and receiving information beams, and comprising means for transmitting information beams by optical means between the cards, provided with means complementary connection opposite the card connection means, characterized in that the beam transmission means comprise a flat optical guide (10) made of dielectric material conducting light, extending approximately parallel to the main card (12), opposite the transmission and reception means of each card to connect them together.
2. Dispositif selon la revendication 1, caracté- risê en ce que le guide est réalisé en polymère.2. Device according to claim 1, characterized in that the guide is made of polymer.
3. Dispositif selon la revendication 1 ou 2, caractérisé en ce que les moyens d'émission et de récep¬ tion des faisceaux optiques des cartes auxiliaires s'é- tendent dans un plan à peu près perpendiculaire au plan du guide (10) et en ce que les moyens de connexion complémen¬ taires du guide comportent en regard de ces moyens de connexion de chaque carte, une portion de surface d'entrée et de sortie de faisceaux et une portion (10a, 10b, lOd) de déviation de faisceaux pour dévier les faisceaux émanant des moyens d'émission de faisceaux de chaque carte dans la direction générale du guide et les faisceaux se propageant dans le guide, en direction des moyens de réception de chaque carte. 3. Device according to claim 1 or 2, characterized in that the means for transmitting and receiving the optical beams of the auxiliary cards extend in a plane approximately perpendicular to the plane of the guide (10) and in that the complementary connection means of the guide comprise, opposite these connection means of each card, a portion of the beam entry and exit surface and a portion (10a, 10b, 10d) of beam deflection to deflect the beams from the beam emitting means of each card in the general direction of the guide and the beams propagating in the guide, towards the receiving means of each card.
4. Dispositif selon l'une quelconque des reven¬ dications précédentes, caractérisé en ce que le guide présente une forme en étoile.4. Device according to any one of the preceding reven¬ dications, characterized in that the guide has a star shape.
5. Dispositif selon les revendications 1 à 3, caractérisé en ce que le guide présente une forme en boucle.5. Device according to claims 1 to 3, characterized in that the guide has a loop shape.
6. Dispositif selon les revendications 1 à 3, caractérisé en ce que le guide est rectiligne.6. Device according to claims 1 to 3, characterized in that the guide is straight.
7. Dispositif selon l'une quelconque des reven- dications précédentes, caractérisé en ce que le guide (10) est disposé sous la carte principale (12).7. Device according to any one of the preceding claims, characterized in that the guide (10) is arranged under the main card (12).
8. Dispositif selon la revendication 1 à 6, caractérisé en ce que le guide (10) est disposé sur la carte principale (12). 8. Device according to claim 1 to 6, characterized in that the guide (10) is arranged on the main card (12).
9. Dispositif selon l'une quelconque des reven¬ dications 3 à 8, caractérisé en ce que la portion de déviation de faisceaux comprend des plans inclinés.9. Device according to any one of reven¬ dications 3 to 8, characterized in that the beam deflection portion comprises inclined planes.
10. Dispositif selon la revendication 9, carac¬ térisé en ce que les plans inclinés sont formés par les rebords de rainures en V.10. Device according to claim 9, carac¬ terized in that the inclined planes are formed by the edges of V-grooves.
11. Dispositif selon la revendication 9, carac¬ térisé en ce que les plans inclinés sont formés par les rebords d'évidements de section progressivement décrois¬ sante. 11. Device according to claim 9, carac¬ terized in that the inclined planes are formed by the edges of recesses of gradually decreasing health section.
12. Dispositif selon la revendication 11, caractérisé en ce que les évidements sont coniques.12. Device according to claim 11, characterized in that the recesses are conical.
13. Dispositif selon la revendication 11, caractérisé en ce que les évidements sont pyramidaux.13. Device according to claim 11, characterized in that the recesses are pyramidal.
14. Dispositif selon l'une quelconque des revendications 10 à 13, caractérisé en ce que les profon¬ deurs des rainures ou des évidements sont différentes selon leur position dans le guide. 14. Device according to any one of claims 10 to 13, characterized in that the depths of the grooves or recesses are different according to their position in the guide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP92919445A EP0602158A1 (en) | 1991-09-06 | 1992-09-02 | Device for optical transmission of data between different electronic circuits |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9111067A FR2681201B1 (en) | 1991-09-06 | 1991-09-06 | DEVICE FOR TRANSMITTING INFORMATION OPTICALLY BETWEEN DIFFERENT ELECTRONIC CIRCUITS. |
| FR91/11067 | 1991-09-06 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO1993005590A1 true WO1993005590A1 (en) | 1993-03-18 |
Family
ID=9416723
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/FR1992/000839 WO1993005590A1 (en) | 1991-09-06 | 1992-09-02 | Device for optical transmission of data between different electronic circuits |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP0602158A1 (en) |
| FR (1) | FR2681201B1 (en) |
| WO (1) | WO1993005590A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0864894A1 (en) * | 1997-02-18 | 1998-09-16 | International Technology Consultants Ltd. | A waveguide |
| WO1999012065A1 (en) * | 1997-09-03 | 1999-03-11 | Robert Bosch Gmbh | Electrical appliance |
| WO2004040342A1 (en) * | 2002-10-29 | 2004-05-13 | Canon Kabushiki Kaisha | Optical slab waveguide interchip communication bus and synchronisation method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4733093A (en) * | 1984-03-26 | 1988-03-22 | Northern Telecom Limited | Electronic apparatus with circuit cards and signals optically coupled therebetween |
| GB2208566A (en) * | 1987-08-06 | 1989-04-05 | Plessey Co Plc | Circuit board back plane assembly with electrical and optical connectors |
| US4863229A (en) * | 1982-02-17 | 1989-09-05 | Sharp Kabushiki Kaisha | Optical information transmitting device |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59126339A (en) * | 1983-01-08 | 1984-07-20 | Akai Electric Co Ltd | Bi-directional optical transmission system |
| JPS59232312A (en) * | 1983-06-16 | 1984-12-27 | Nippon Telegr & Teleph Corp <Ntt> | High polymer optical guide path and its production |
-
1991
- 1991-09-06 FR FR9111067A patent/FR2681201B1/en not_active Expired - Fee Related
-
1992
- 1992-09-02 WO PCT/FR1992/000839 patent/WO1993005590A1/en not_active Application Discontinuation
- 1992-09-02 EP EP92919445A patent/EP0602158A1/en not_active Withdrawn
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4863229A (en) * | 1982-02-17 | 1989-09-05 | Sharp Kabushiki Kaisha | Optical information transmitting device |
| US4733093A (en) * | 1984-03-26 | 1988-03-22 | Northern Telecom Limited | Electronic apparatus with circuit cards and signals optically coupled therebetween |
| GB2208566A (en) * | 1987-08-06 | 1989-04-05 | Plessey Co Plc | Circuit board back plane assembly with electrical and optical connectors |
Non-Patent Citations (4)
| Title |
|---|
| IBM TECHNICAL DISCLOSURE BULLETIN. vol. 22, no. 8B, Janvier 1980, NEW YORK US pages 3519 - 3520 L.BAILLET ET AL 'Module-to-module Communication via Fiber-optic piping' * |
| ONDE ELECTRIQUE. vol. 70, no. 6, Novembre 1990, PARIS FR pages 27 - 31 C.VERGNOLLE ET AL 'Connectique optique dans les matériels aéroportés : Limitation des connexions par fond de panier, perspective de solutions optiques' cité dans la demande * |
| PATENT ABSTRACTS OF JAPAN vol. 8, no. 250 (E-279)(1687) 16 Novembre 1984 & JP,A,59 126 339 ( AKAI DENKI ) * |
| PATENT ABSTRACTS OF JAPAN vol. 9, no. 113 (P-356)(1836) 17 Mai 1985 & JP,A,59 232 312 ( NIPPON DENSHIN ) * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0864894A1 (en) * | 1997-02-18 | 1998-09-16 | International Technology Consultants Ltd. | A waveguide |
| WO1999012065A1 (en) * | 1997-09-03 | 1999-03-11 | Robert Bosch Gmbh | Electrical appliance |
| WO2004040342A1 (en) * | 2002-10-29 | 2004-05-13 | Canon Kabushiki Kaisha | Optical slab waveguide interchip communication bus and synchronisation method |
| US7151865B2 (en) | 2002-10-29 | 2006-12-19 | Canon Kabushiki Kaisha | Optical waveguide device, optical and electrical elements combined device, method of driving the same, and electronic equipment using the same |
Also Published As
| Publication number | Publication date |
|---|---|
| EP0602158A1 (en) | 1994-06-22 |
| FR2681201A1 (en) | 1993-03-12 |
| FR2681201B1 (en) | 1994-11-18 |
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