WO2012136645A1 - Transmetteur optique de rotation et procédé et dispositif pour la fabrication dudit transmetteur optique de rotation - Google Patents

Transmetteur optique de rotation et procédé et dispositif pour la fabrication dudit transmetteur optique de rotation Download PDF

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Publication number
WO2012136645A1
WO2012136645A1 PCT/EP2012/056049 EP2012056049W WO2012136645A1 WO 2012136645 A1 WO2012136645 A1 WO 2012136645A1 EP 2012056049 W EP2012056049 W EP 2012056049W WO 2012136645 A1 WO2012136645 A1 WO 2012136645A1
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WO
WIPO (PCT)
Prior art keywords
axis
optical
bearing
rotor
bore
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.)
Ceased
Application number
PCT/EP2012/056049
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German (de)
English (en)
Inventor
Stephan Ott
Robert RAUM
Harry Schilling
Matthias Rank
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.)
Moog GAT GmbH
Original Assignee
GAT Gesellschaft fuer Antriebstechnik mbH
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 GAT Gesellschaft fuer Antriebstechnik mbH filed Critical GAT Gesellschaft fuer Antriebstechnik mbH
Priority to DE112012001561.4T priority Critical patent/DE112012001561A5/de
Publication of WO2012136645A1 publication Critical patent/WO2012136645A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • 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
    • G02B6/36—Mechanical coupling means
    • G02B6/3604—Rotary joints allowing relative rotational movement between opposing fibre or fibre bundle ends

Definitions

  • the present invention relates to an optical rotary transformer for the direct transmission of an optical signal between a stationary and a rotating machine part, comprising a rotor having a central first bore and a first optical component received therein with a first optical axis and a first bearing seat a first bearing axis defined, and having a stator having a second central bore and an optical component received therein with a second optical axis and a second bearing seat defining a second bearing axis, wherein a sleeve of the component or the sleeve fitting receiving first bore in the rotor defines a first axis that does not coincide with the first optical axis, and wherein the first and second optical axes are aligned with the axis of rotation of the rotor.
  • the present invention also relates to a corresponding method for producing and adjusting a rotary optical transformer of the aforementioned type.
  • Corresponding optical rotary joints are required when optical signals are directly, i. without intermediate conversion into electrical signals, to be transmitted contactlessly from a stationary to a rotating element, wherein both elements can also be rotatable around the common axis in space.
  • this involves contactless optical data transmission from a stationary to a rotating machine part or vice versa.
  • optical components which could also be referred to as (optical) "signal element” or “optical transmission element, and which typically consist of an elongated cylindrical sleeve, in which opens and ends of an optical fiber fixed substantially coaxially with the sleeve, optical signals emerging from the free end of this optical fiber and collimated by an imaging optic provided at the other end of the sleeve, for example a collimator lens, to converge on the opposite end Part in a similar manner and vice versa coupled back into an optical fiber too become.
  • the collimated by the collimator optical signal can also be redirected by a deflection mirror.
  • the bundled light beam emanating from the collimator lens does not coincide exactly with the axis of the sleeve, which in turn typically coincides with the production of the units consisting of an optical fiber, a sleeve and a collimator lens is arranged in a matching bore whose axis is also referred to here as "first axis".
  • the first axis is therefore at the same time the geometric axis of the sleeve or the sleeve receiving this bore.
  • first axis The light beam emerging from the signal or the optical axis defined by the light beam is accordingly opposite the axis of the bore or the outer cylindrical sleeve, here referred to as "first axis", wherein the sleeve and the bore also have a square or other polygonal cross section However, they could in any case define a first axis, more or less offset and tilted.
  • the optical axis thus does not run along the first axis of the bore of the receiving element receiving the component (with random exceptions).
  • a larger bore or a larger cavity for receiving the collimator sleeve is provided, which ensures sufficient clearance for the collimator sleeve, so that it can initially with the aid of a suitable device is adjusted to the cavity so that the axis of rotation of the rotor (which coincides generally with the axis of the sleeve-receiving cavity) coincides with the optical axis of the collimator.
  • the remaining cavity is then filled with a filling material or adhesive and the collimator sleeve is glued and fixed in the cavity of the rotor or rotary bearing.
  • the maximum allowable errors in axial displacement or tilt of the optical axes of respective optical components are 60 ⁇ or less for axial displacement and 0.05 ° or less for tilting, if damping of more than 2.5 dB is avoided want. These error tolerances can not be met with the conventional methods and devices in the rule.
  • adjusting elements and in particular adjusting screws are provided, with the help of which the sleeve female receiving element with respect to the bearing axis in the rotor or stator can be moved and tilted to compensate for the misalignment between the optical axis and the bearing axis, because of the punctual loading of Justier vom
  • By adjusting screws however, such device are not long-term stability and often need to be readjusted. At greater mechanical load, such as at higher speeds, the adjustment of such devices is lost very quickly.
  • the present invention concentrates primarily on the adjustment and fixing of the first optical axis with respect to the rotor , Preferably, however, analogous measures are also to be applied to the adjustment and fixation of the second optical axis with respect to the stator.
  • the present invention is therefore based on the object to provide an optical rotary transformer with the features mentioned above and a method for its production, which allow, in particular the error tolerances for the alignment of the optical axis relative to the axis of rotation drastically reduce the rotor and make it much more stable over time.
  • the process for the preparation should be as simple and safe. This makes it possible to also use the high-quality optical fibers required for high data rates, which have relatively small core cross-sections and their use is possible only if very close fault tolerances are maintained.
  • the present invention is also applicable when using optical fibers having substantially larger cross-sections and are more tolerant to fault, whereby the use of such optical fibers, the possibly occurring attenuation during transmission is significantly reduced.
  • the object underlying the invention is achieved in that the surfaces of the rotor determining the position and orientation of the optical axis outside the first bore are machined such that the first axis (12) faces the first bearing axis (16). is misaligned while the first optical axis (14) coincides with the first bearing axis (16).
  • the basic principle of the present invention is that all components of the rotary transformer are firmly and uniquely positioned against each other and have no play, in particular no adjustment play and no intermediate adjustment devices, with any contiguous surfaces of parts of the rotor and / or the bearing seat of the rotor so are configured so that the optical axis coincides with the first bearing axis (which is also the axis of rotation of the rotor,), which in turn has the consequence that the first bearing axis and the first axis of the sleeve of the optical component no longer coincide.
  • the unique positioning can be achieved by surface contact of preferably rounded or angled surfaces or by a three-point system non-collinear points, which in turn are not adjustable.
  • At least one receiving element is provided between the optical component or its sleeve and a bearing portion of the rotor having the bearing seat.
  • the contact surfaces between this receiving element and the bearing portion can be edited so that the receiving element on the bearing portion so offset and tilted rests that the optical axis of the component with respect to the bearing seat on the rotor has the desired orientation.
  • the bearing portion in which the bearing portion is integrally connected to the receiving element and thus receives the optical component directly in a central bore of the rotor, the bearing seat itself, d. H. the bearing surfaces of the rotor, designed so that it defines a bearing axis, which coincides with the optical axis.
  • both the contact surfaces between receiving element and rotor and the surfaces of the bearing seat of the rotor to be adjusted accordingly, it being preferable to take only one of these measures, as far as possible.
  • the variant in which the component is arranged directly in a bore of a compact rotor preferred because it manages with fewer components and the production is relatively simple.
  • a rotor having a central bore for receiving the optical component and with respect to this central bore has a centrally symmetrical bearing seat, after inserting and fixing the component in the central bore and determining the corresponding optical axis, at its bearing seating surfaces is post-processed, so that they are now centrally symmetrical with respect to the optical axis.
  • precision bearings are used between the rotor and the stator, so that one can definitely expect a precise concentricity of the corresponding bearing.
  • even certain inaccuracies of a bearing can be compensated by appropriate machining of the bearing seat on the rotor or on the stator.
  • the unique positioning of the optical axis is then ensured by the seat of the bearing on or in the respective bearing seat.
  • centrally symmetric is to be understood here as a generalization of rotationally symmetrical and includes embodiments with contact points or surfaces which each have the same distance from a common center, without this having to be a closed surface.
  • An example would be one of a splined shaft.
  • both the first bearing seat and the second bearing seat are nevertheless formed by first or second rotationally symmetrical bearing surfaces.
  • the rotationally symmetric surfaces may in principle be conical surfaces or surfaces of an ellipsoid of revolution, but in the preferred variant cylindrical surfaces, and especially because for cylindrical surfaces corresponding precision rolling bearings are easier to obtain and are much cheaper than specially manufactured for other surfaces bearing.
  • the stator has the basic shape of a hollow cylinder which is open at one end and substantially closed at the other end, wherein the closed end face, however, has a central bore, which is referred to here as a "second central bore".
  • the rotor or its bearing portion has correspondingly the shape of a cylinder or pin with a cylindrical outer surface and is also provided at its one end with a flange-like extension.
  • tapers or extensions may be provided on the stator or rotor, for example, to accommodate retaining rings for bearings and / or seals therein.
  • Between the bearing seat of the rotor and the bearing seat of the stator is preferably at least one, in particular two, roller bearings arranged, which are preferably precision bearings and have a very low concentricity tolerance.
  • the inner radius of the bearing seat of the stator is therefore larger by the radial thickness of the rolling bearing than the outer radius of the rotor, these dimensions are of course only for the state of the bearing seat surfaces after appropriate adjustment of the optical components and post-processing of the corresponding bearing seat surfaces apply, which were previously made with allowance ..
  • the bearing seat surfaces of the rotor and the stator are preferably made with a certain allowance, that is, it is provided from the outset that of these surfaces still a certain layer must be removed, but not symmetrical about the original axis of the bearing seat surfaces distributed. Rather, the layer thickness to be removed can vary both in the circumferential direction and in the axial direction. In practice, for example, you can proceed as follows:
  • the stator After an optical component is arranged and fixed in the second central bore, the stator is received in an adjusting or measuring device and rotated about the axis of the adjusting or measuring device, which is also the axis of the bearing seat of the stator in the context of receiving tolerances , In this case, a light signal is emitted via the optical component, which is detected by a detector opposite the second bore. If the optical axis is not aligned with respect to the bearing seat surface of the stator, the light beam emanating from the component on the detector surface describes a more or less offset circle or an ellipse.
  • the diameter of the inner diameter of the corresponds to the rolling bearing and which is centrally symmetrical with respect to the optical axis of the first optical component.
  • both the bearing seat of the rotor and the bearing seat of the stator have a sufficient axial length to accommodate two bearings between these two parts with sufficient distance can.
  • the bearings can be axially fixed by corresponding bearing rings both on the rotor and on the stator and moreover at least one or two seals can also be provided axially in front of the roller bearings in order to protect them against contamination.
  • the seals are in particular sliding seals.
  • an additional receiving element is provided for mounting the first optical element on the rotor, which has a central bore for receiving the optical component and moreover has contact surfaces with which it bears against the rotor and fixed is expediently provided that instead of the bearing seat of the rotor (and possibly also of the stator), the corresponding contact surfaces on the receiving element and / or on the rotor are machined in such a way that when the receiving element is fixed to the rotor, the optical axis with the Rotation axis coincides, even if the receiving element in total then with respect to the optical axis is not (more) centrally symmetrical.
  • the contact surfaces after finishing ment preferably axially parallel and perpendicular thereto radial contact surfaces with respect to the optical axis and the axis of rotation.
  • the abutment surfaces may also be rotationally symmetric surfaces having axial and radial components.
  • the contact surfaces themselves are not aligned with respect to the optical axis and the axis of rotation, the optical axis and axis of rotation can still coincide within the achievable tolerances.
  • Axial abutment surfaces are those surfaces which extend axially, ie extend parallel to a corresponding axis, while radial abutment surfaces extend perpendicular to a corresponding axis.
  • the receiving element is therefore in turn mounted on preferably axially and radially bearing surfaces or on only rotationally symmetrical contact surfaces on the bearing portion of the rotor or stator.
  • These contact surfaces are in turn adapted so that the first axis of the receiving element (axis of the receiving bore and the sleeve) and the optical component relative to the axis of rotation of the bearing portion and the associated rotor or stator is offset and tilted in the correct manner, can It can be achieved that the tilting and the offset between the optical axis and the first axis of the receiving element is compensated by the further misalignment between the first axis and the bearing axis or axis of rotation (which is produced by post-processing of the contact surfaces), so that the optical axis and the axis of rotation coincide.
  • the contact surfaces can be machined with sufficient mechanical precision to be able to meet the required narrow error tolerances which can not or can not be achieved permanently with the conventional technique by adjustment in a filling material and / or adhesive layer.
  • the contact surfaces of the receiving element are machined so that they are aligned with respect to the optical axis, while the contact surfaces of the bearing section so machined. tet or remain so that they are aligned with respect to the axis of rotation.
  • the reverse case namely alignment of the contact surfaces of the receiving element with respect to the axis of rotation and alignment of the bearing surfaces of the bearing portion with respect to the optical axis but would lead to the same result.
  • the radial distance of the radial contact surfaces to the corresponding axes with respect to which they are aligned must always be the same, so that finally the optical axis and the axis of rotation coincide.
  • axial abutment surfaces parallel to this axis and radial abutment surfaces with respect to this axis are perpendicular, while rotationally symmetric surfaces are rotationally symmetrical with respect to just this axis. It is understood that axial and radial contact surfaces can also be rotationally symmetrical surfaces at the same time, but need not be rotationally symmetrical.
  • the at least one first optical component should be an optical fiber and at least one collimator lens, for.
  • GRIN lens or a lens combination which are fixed in a common housing and aligned with each other.
  • the collimator lens By the collimator lens, a parallel, possibly also a waisted beam or light beam is generated.
  • a second optical component which is arranged on the respective opposite of the rotor or rotary bearing parts, the same structure as the first optical component.
  • At least one of the two optical components may also be a deflection element, such as a mirror, a prism, or an optical grating, for example, only along the optical axis, i. H. must be arranged in the emanating from the first optical component beam of electromagnetic waves or light, in which case, however, the signal from the deflection element in turn must be directed to a further correspondingly aligned optical component having a collimator lens and a fiber or equivalent means.
  • a deflection element such as a mirror, a prism, or an optical grating
  • the rotor or stator in turn has axial and radial abutment surfaces which are not correctly aligned parallel or perpendicular with respect to the axis of rotation, this error can additionally be achieved by reworking the abutment surfaces of the receiving element or, preferably, the rotor or stator, be compensated.
  • the contact surfaces on the rotor or stator are subsequently processed so that they are correctly aligned with respect to the optical axis.
  • rotationally symmetrical contact surfaces each having axial and radial components, such as conical surfaces may be provided, wherein at least one of these conical contact surfaces, ie either on the bearing section or on the receiving element is machined so that its associated cone axis is misaligned with respect to the axis of rotation and the optical axis in exactly the way that the error between the optical axis and axis of rotation is balanced except for the inevitable tolerance deviations.
  • conical surfaces are also suitable for unambiguously fixing the radial position and the angular orientation of the receiving element relative to the bearing section.
  • the receiving element and rotor may have mutually matching conical bearing surfaces, which are aligned concentrically with respect to the axis of rotation and the geometric axis of the receiving element.
  • the geometric axis and the axis of rotation also coincide in this initial state.
  • the geometric axis of at least one of the parts (receiving element and bearing portion) with respect to the axis of rotation is so offset and tilted in that the optical axis and the axis of rotation coincide again.
  • the conical surface designed as an inner cone can expediently be reworked accordingly, the conical surface of the rotor preferably being designed as an inner cone.
  • the (post-) processing of the contact surfaces can be done for example by machining or grinding.
  • At least the first optical component may comprise an optical fiber, which in one embodiment of the invention is a "singlemode" or “multimode” fiber.
  • single mode fibers may have a fiber core diameter in the range of 3 to 12 ⁇ , preferably in the range of 5 to 1 ⁇ ⁇
  • the corresponding diameter of multimode fibers is more in the range of 50 to 60 ⁇ possibly up to 100 ⁇ or above, requires but also a precise alignment and bundling of the electromagnetic waves on the fiber core. More preferably, a singlemode fiber has a fiber core diameter of about 9 ⁇ m.
  • the alignment of the optical axis with respect to the axis of rotation takes place with a maximum radial offset and / or angular error, which is a damping during the signal transmission from the one optical component to the other optical component of less than or equal to 3 dB, preferably of less or less than 2.5 dB.
  • the optical axis should be tilted relative to the axis of rotation at a relative angle of less than 0.1 °.
  • the imaging figure is detected at two different distances between the optical component and the detector, so that the position and angular orientation of the optical component can be calculated even better (for example using the radiation set).
  • the position of the axis of rotation with respect to the detector system must be known in order to be able to derive displacement and angular tilting of the optical axis from only one imaging figure generated on the detector by the optical component during rotation with the alignment shaft.
  • FIG. 1 shows a first embodiment of a rotary transformer according to the invention
  • FIG. 2 shows the rotor according to the first embodiment
  • Figure 4 shows a variant of an optical rotary transformer with receiving elements before
  • FIG. 5 is a schematic representation of the surfaces to be removed on a receiving element of a rotor
  • Figure 6 shows the final seat of the receiving element in the rotor after machining
  • FIG. 7 shows another variant with conical contact surfaces.
  • a rotary transformer according to the invention which is designated as a whole by 100 and essentially consists of a rotor 10 and a stator 20 as well as a retaining ring 40 and two roller bearings 31, 32.
  • the rotor 10 consists of a bearing portion 15 in the form of a cylindrical pin with a flange 18 at one end and a stepped transition from the bearing portion 15 to the flange 18, which forms an abutment collar 33.
  • An optical component 13 is suitably received in a central bore 1 1.
  • the optical device 13 has an optical axis 14, which is shown in phantom and which deviates recognizably from the first axis 12, which is the geometric axis of the central bore 1 1 and which is also the axis of the cylindrical bearing seat 17 in an initial state, which is still referred to as the first bearing axis 16 to distinguish it from the axis 12 and is not shown separately in Figure 2, since it coincides with the axis 12.
  • FIG. 3 shows a stator 20 in the left partial image.
  • the stator 20 is a substantially hollow-cylindrical component, with an open end side 28 and a closed end side 28, wherein the closed front side 28 has a central bore 21 in which an optical component 23 is fittingly received.
  • the first axis 22 of the central bore 21 (which coincides with the geometrical axis 26 of the cylindrical bearing seat surface 27 before corresponding machining) deviates from the geometrical axis 24 of the optical component 23.
  • the bores 11 and 21 have a diameter matched to the outer diameter of the sleeves of the optical components 13 and 23, so that the components 13, 23 sit essentially free of play in their bores 11 and 21 and in addition to the example by a thin adhesive layer can be fixed, which has no effect on the long-term stability of the position of the optical axis.
  • FIG. 1 shows the assembled state of rotor 10 and stator 20, which, however, can only take place after machining of the bearing seats 17 and 27.
  • both the cylindrical inner surface of the stator 20 and the cylindrical outer surface 17 of the rotor are first made with a certain excess, in order then ablate sufficient material according to the radial offset and the tilting of the optical axes 14 and 24 respectively so that the final surfaces 17, 27 are rotationally symmetric with respect to the axles 14, 24, respectively, and at the same time have the proper diameter for the roller bearings 31, 32.
  • FIG. 4 is an alternative embodiment of the present invention in which separate receiving elements 2, 45 are provided by the bearing section 15 / flange 18 and the stator body 25 '.
  • the optical axis 14 of a component 13 deviates from the geometric axis 12 of the bore of the receiving element 2, as well as the optical axis 24 deviates from the geometric axis 22 of the receiving element 45 and its bore.
  • the axis 16 is located, which is the axis of rotation of a (not shown) pair of rolling bearings between the rotor 10 'and stator 20'. In the illustrated arrangement, the axis of rotation 16 coincides with the axes 12 and 22 of the receiving elements 2 and 45, respectively.
  • Figure 5 shows an image of a partially assembled rotary transformer according to Figure 4, wherein on the receiving element 2 by an additional narrow hatching the areas are indicated, which must be removed from the surfaces 6 and 7 of the flange of the receiving element 2, so that the optical axis 14th the desired orientation along the axis of rotation
  • the offset of the optical axis 14 and its tilt relative to the axis 12 of the receiving element 2 can be determined and the surfaces 6, 7 of the flange of the receiving element are then processed in a corresponding manner, so that the surface 6 perpendicular to optical axis 14 runs and the peripheral surface 7 of the flange concentric and parallel to the axis 14, wherein the outer diameter of the flange on the receiving element 2 then coincides with the inner diameter of the corresponding recess on the flange 18 of the rotor, so that receiving element 2 and rotor 10 'can be assembled in the manner shown in Figure 6.
  • Figure 7 shows yet another embodiment in which instead of the mutually perpendicular surfaces 6 and 7 conical contact surfaces 8 are provided, which allow, as can be seen from the upper part of Figure 7, receiving element 2 'and rotor 10 "first in order to measure the deviations of the axis 14 from the axis 12, and then subsequently to work the conical surfaces 8 so that the receiving element is correspondingly tilted and radially offset so that the axis 14 coincides with the bearing axis.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Manufacture Of Motors, Generators (AREA)

Abstract

L'invention concerne un transmetteur optique de rotation, pour la transmission directe d'un signal optique entre une pièce fixe et une pièce mobile en rotation d'une machine, comprenant un rotor (10) qui comporte une section de palier (15) avec une première portée (17) définissant un premier axe de palier (16), un premier composant optique (13) doté d'un premier axe optique (14) étant logé dans un premier alésage dans le rotor. Ledit transmetteur optique de rotation comprend également un stator (20) qui comporte une deuxième section de palier (25) avec une deuxième portée (27) définissant un deuxième axe de palier (26), un composant optique (23) doté d'un deuxième axe optique (24) étant disposé dans un deuxième alésage central (21) dans le stator (20). Une douille du composant optique ou le premier alésage logeant exactement la douille définit un premier axe (12) qui ne coïncide pas avec le premier axe optique, les premiers et deuxièmes axes optiques étant orientés avec l'axe de rotation du rotor. L'invention vise à créer un transmetteur optique de rotation présentant les caractéristiques énoncées dans le préambule, ainsi qu'un dispositif correspondant et un procédé pour sa fabrication, lesquels permettent de diminuer drastiquement les tolérances d'erreur pour l'alignement de l'axe optique par rapport à l'axe de rotation du transmetteur et de les rendre nettement plus stables dans le temps. A cet effet, les surfaces d'appui du rotor déterminant la position et l'orientation de l'axe optique sont usinées en dehors du premier alésage de telle sorte que le premier axe (12) est désorienté par rapport au premier axe de palier (16), tandis que le premier axe optique (14) coïncide avec le premier axe de palier (16).
PCT/EP2012/056049 2011-04-04 2012-04-03 Transmetteur optique de rotation et procédé et dispositif pour la fabrication dudit transmetteur optique de rotation Ceased WO2012136645A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE112012001561.4T DE112012001561A5 (de) 2011-04-04 2012-04-03 Optischer Drehübertrager und Verfahren und Vorrichtung zu seiner Herstellung

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011006739 2011-04-04
DE102011006739.6 2011-04-04

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WO2012136645A1 true WO2012136645A1 (fr) 2012-10-11

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3570084A1 (fr) 2018-05-16 2019-11-20 LTN Servotechnik GmbH Dispositif de transmission de signaux optiques entre deux unités structurales rotatives
WO2021013912A1 (fr) 2019-07-25 2021-01-28 Beckhoff Automation Gmbh Robot industriel
US12179346B2 (en) 2019-07-25 2024-12-31 Beckhoff Automation Gmbh Active and passive arm module, end module and industrial robot
US12208518B2 (en) 2019-07-25 2025-01-28 Beckhoff Automation Gmbh Arm module, robotic arm and industrial robot
US12285860B2 (en) 2019-07-25 2025-04-29 Beckhoff Automation Gmbh Arm module for a modular robotic arm of an industrial robot

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0107035A1 (fr) * 1982-10-25 1984-05-02 Litton Systems, Inc. Joint rotatif pour alignement de fibres optiques à voie unique
US5039193A (en) * 1990-04-03 1991-08-13 Focal Technologies Incorporated Fibre optic single mode rotary joint
US6263133B1 (en) * 1999-03-29 2001-07-17 Scimed Life Systems, Inc. Optical focusing, collimating and coupling systems for use with single mode optical fiber
EP1857847A1 (fr) * 2006-05-16 2007-11-21 Schleifring und Apparatebau GmbH Dispositif et procédé d'alignement d'un transmetteur optique rotatif

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0107035A1 (fr) * 1982-10-25 1984-05-02 Litton Systems, Inc. Joint rotatif pour alignement de fibres optiques à voie unique
US5039193A (en) * 1990-04-03 1991-08-13 Focal Technologies Incorporated Fibre optic single mode rotary joint
US6263133B1 (en) * 1999-03-29 2001-07-17 Scimed Life Systems, Inc. Optical focusing, collimating and coupling systems for use with single mode optical fiber
EP1857847A1 (fr) * 2006-05-16 2007-11-21 Schleifring und Apparatebau GmbH Dispositif et procédé d'alignement d'un transmetteur optique rotatif

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3570084A1 (fr) 2018-05-16 2019-11-20 LTN Servotechnik GmbH Dispositif de transmission de signaux optiques entre deux unités structurales rotatives
US10895693B2 (en) 2018-05-16 2021-01-19 Ltn Servotechnik Gmbh Device for transmitting optical signals between two rotatable sub-assemblies
WO2021013912A1 (fr) 2019-07-25 2021-01-28 Beckhoff Automation Gmbh Robot industriel
DE102019120131B4 (de) 2019-07-25 2023-01-12 Beckhoff Automation Gmbh Optische Rotations-Übertragungseinrichtung für ein Automatisierungssystem, Armmodul für einen modularen Roboterarm sowie Industrieroboter
US12109694B2 (en) 2019-07-25 2024-10-08 Beckhoff Automation Gmbh Industrial robot
US12179346B2 (en) 2019-07-25 2024-12-31 Beckhoff Automation Gmbh Active and passive arm module, end module and industrial robot
US12208518B2 (en) 2019-07-25 2025-01-28 Beckhoff Automation Gmbh Arm module, robotic arm and industrial robot
US12285860B2 (en) 2019-07-25 2025-04-29 Beckhoff Automation Gmbh Arm module for a modular robotic arm of an industrial robot

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