CN101788699B - Hollow fiber optic rotary joint - Google Patents
Hollow fiber optic rotary joint Download PDFInfo
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- CN101788699B CN101788699B CN201010103099XA CN201010103099A CN101788699B CN 101788699 B CN101788699 B CN 101788699B CN 201010103099X A CN201010103099X A CN 201010103099XA CN 201010103099 A CN201010103099 A CN 201010103099A CN 101788699 B CN101788699 B CN 101788699B
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Abstract
The invention discloses a hollow fiber optic rotary joint and a multi-channel fiber optic rotary joint constructed by the hollow fiber optic rotary joints. A single-channel hollow fiber optic rotary joint comprises an input end, an output end and annular transmission medium in the middle; wherein, the input end is composed of a fiber optic, a fiber optic collimator and a coupler blazed grating; and the output end is composed of a collimation lens, a fiber optic collimator and a fiber optic. The transmission medium is composed of an annular substrate, the upper surface of the annular substrate is a plane and the lower surface thereof is a conical surface, an output window is arranged on the conical surface and the output end is fixed towards the output window. The input end rotates around the symmetry shaft of the transmission medium. A plurality of single-channel joints are fabricated on the same substrate by the same method, for the two adjacent single-channel joints, the outer diameter of the inner side joint is less than the inner diameter of the outer side joint so that the interference among the channels is avoided. The joint with a plurality of single channels can form the multi-channel connector. The invention has high coupling efficiency, dynamic transmission property and can transmit flow media such as gas and liquid in hollow state.
Description
[technical field]: the invention belongs to spatial light interconnection, the communication technology, binary optical, optical waveguide and micro-optic technical field.Be particularly related to a kind of novel in the empty state fiber rotation connector, claim the paraxonic fiber rotation connector again or from the axle fiber rotation connector, to realize dynamically multichannel two-way free space optical interconnection.
[background technology]: in infotech, it is very necessary keeping the high-efficiency transfer of information.In signals transmission, need to rotate the mechanism that is of coupled connections signal is constantly passed to the other end from an end.This mechanism is exactly a rotary connector.Connector is the interconnection device of signal, is used for the connection and the transmission of short-range signal.Rotary connector is widely used in different fields, as industrial mechanical arm, winch, oil exploration equipment, be used for the scanning system of hydrospace detection and follow the trail of radar, seabed robot, the seabed underwater acoustic system of military battleship, the rotation control tower of battlebus, the aircraft of space industry and Medical Devices CT scan system etc.
In dynamic fiber rotation connector signals transmission, sometimes also follow the transmission of media such as gas, oil and water, for example signal will follow gases at high pressure to transmit simultaneously in some radar use, and the transmission of these media needs a passage, and this passage is through being normally placed in the position of central shaft; Sometimes lay devices such as some roller bearings, turning barrel in addition in the part of the central shaft of connector, or even human body, its objective is that carrying out some stretches, rolls or the operation of scanning.
Because central shaft is taken by other media or device, light signal is no longer along connector center of rotation transmitting optical signal, and the transmission line of most of existing dynamic fiber rotation connector all to be the technology path that the optical axis according to the use optical device overlaps with the connector center of rotation design and make.Therefore, existing this part dynamic fiber rotation connector can not satisfy the application of above-mentioned occasion, needs a kind of light signal to transmit in " hollow " attitude joints of optical fibre.
At present, domestic still do not have this type of fiber rotation connector.Several " hollow " attitude fiber rotation connector has been arranged abroad, and they each have its characteristics and shortcoming.Patent US410998 proposes a kind of middle empty state fiber rotation connector, and its ultimate principle is by inside and outside two circular irrors, utilizes the reflection of light beam between catoptron to propagate light beam.Two catoptrons are concentric, and input end is at outer wall place input beam, this just require the outer wall catoptron promptly can transmitted beam also can folded light beam, very high for the catoptron requirement, can cause light beam coupling efficient low.Patent US4753506 propose a kind of in the empty state fiber rotation connector, its input end, output terminal are concentric with hollow space.On the circumference of input end, be evenly distributed 8 elliptical reflectors, corresponding output terminal 8 receivers that also distribute.But each catoptron of input end gets final product also folded light beam of transmitted beam.Propagate into next catoptron behind the segment beam penetration mirror, propagate into receiving plane after another part light beam is reflected, form a disc, in this disc, have a receiver to receive this reflected signal at receiving plane.Clearly, the coupling efficiency of this connector is low.The connector that patent US4934783 proposes adopts a cylinder as catoptron, cylinder can focus on a bit the planar light beam reflection of incident, become a virtual focus, beam divergence afterwards, again be converged to another virtual focus through mirror reflects again, arrive exit end output at last through processes such as overconvergence, reflection, convergence, reflections with this.The focusing principle of this patent utilization circular irror face is propagated light beam, but the circular irror focusing principle only is suitable for the paraxial propagation of light pencil, so when light beam had the incident angle of certain width and light beam relatively large, the focusing effect of this patent was bad, so laser propagation effect is not good yet.The disc waveguide device that the connector utilization that patent US5297225 proposes has the V-type cutting carries out the coupling of spatial light signal, is integrated with 45 ° catoptron in the inside of disc waveguide and comes light signal in the outgoing waveguide.The waveguide device that adopts is when spacing wave is coupled, and coupling efficiency is lower, influences the transmission quality of light signal, can not solve " hollow " dynamically light interconnection fully.The signal of the connector transmission that patent US2003/0210859 A1 proposes is that scioptics are direct-coupled, though kept hollow space, the coupling of each interchannel is to realize by two terminals that the rotor of high speed rotating is selected to need to connect.It is similar to the rotation photoswitch.It is not real middle empty state rotary connector, is a kind of communication device.Patent US2004/0086222 A1 adopts U type reflection groove to propagate light beam, and reflection groove places on the excircle, is distributed with a plurality of reflection grooves on the circumference, and light transmits between a plurality of reflection grooves.This reflection and patent US410998 all belong to the wall reflection-type, and promptly light beam reflects on inside and outside wall.This patent is not owing to there is the inwall reflection, the beam incident angle degree that it requires is very big, so that light beam can propagate into the reflection groove of another position from a reflection groove, because catoptron is not continuous on outer wall, so when connector rotated, it can't realize continuous signal transmission.The rotary connector that patent US2006/0260832A1 proposes is actually the Lens Coupling type, and it adopts very complicated backup system to finish the selection of channel, and is similar with patent US2003/0210859 A1, is a kind of communication system.
[summary of the invention]: the present invention seeks to overcome above shortcomings in the prior art, a kind of novel middle empty state fiber rotation connector is provided.The present invention utilizes grating that input beam is coupled into annular matrix, and the annular matrix hollow position is used for other medium transmission, and matrix is used to realize the turnover of light beam, with dynamic transmission and the hollow transmission that realizes high coupling efficiency.
Empty state fiber rotation connector in provided by the invention, comprise the input end that constitutes by first optical fiber, first optical fiber collimator (as C-lens lens, G-lens lens, sphere lens etc.) and coupling blazed grating, the output terminal that constitutes by collimation lens, second optical fiber collimator and second optical fiber, and the annular transmission medium between input end and the output terminal, input end, output terminal and transmission medium constitute empty state fiber rotation connector in the single channel jointly.Described transmission medium is made of an annular matrix, and the upper surface of transmission medium is a plane, is coated with 4～5 tunics on it.The lower surface of transmission medium is a conical surface, and this conical surface is provided with an output window, and described output window is the plane parallel with upper surface, and the surface of output window is provided with anti-reflection film.Output terminal is fixed on the below of output window, and when placing, output terminal is perpendicular to output window, and collimation lens is used for receiving beam near output window; Simultaneously be provided with reflective line style grating or binary optical elements in the diffraction optical element at upper surface with the output window correspondence position.Input end is arranged on the top of transmission medium, and when placing, input end is perpendicular to the upper surface of transmission medium, and with an end of coupling blazed grating near the transmission medium upper surface; The score line of blazed grating of being coupled simultaneously is parallel with the radial direction of input end present position.Input end can rotate around the axis of symmetry of transmission medium and first optical fiber collimator keeps relative static with the coupling blazed grating.
The present invention promptly can make empty state fiber rotation connector in the single channel, also can make empty state fiber rotation connector in the hyperchannel.The empty state fiber rotation connector can be combined by empty state fiber rotation connector in two that make on the same matrix above-mentioned single channels that differ in size at least in the described hyperchannel, wherein the external diameter of inboard connector does not disturb to guarantee each passage mutually less than the internal diameter of the connector in the outside in Jin Lin two single channel connectors.The empty state fiber rotation connector also can form by the empty state fiber rotation connector is nested at least two above-mentioned single channels that differ in size in the hyperchannel.Because hyperchannel can realize transmitted in both directions, so according to the requirement of transmission direction, the upper surface of the transmission medium of each single channel connector can also can be respectively towards heteropleural towards homonymy.
Advantage of the present invention and good effect:
But the present invention has characteristics such as flow media such as coupling efficiency height, dynamic transmission hollow state transport gas, liquid.Aspect economic benefit, but patent widespread use of the present invention needs occasions such as being rotatably connected of CT scan, light signal, and market outlook are good, have the good technical conversion base.
[description of drawings]:
Fig. 1 is an empty state fiber rotation connector arrangement structural representation in the single channel, and Figure 1A is a three-dimensional side view, and Figure 1B is a front view;
Fig. 2 is the input end structure synoptic diagram;
Fig. 3 is the output end structure synoptic diagram;
Fig. 4 is a matrix calculation of parameter synoptic diagram;
Fig. 5 is the transmission medium structural representation;
Fig. 6 is an empty state fiber rotation connector one-piece construction synoptic diagram in the hyperchannel;
Fig. 7 is that empty state fiber rotation connector master looks sectional drawing in the hyperchannel.
Among the figure, 1 is optical fiber, 2 is optical fiber collimator, 3 are the coupling blazed grating, and 4 is optical fiber, and 5 is optical fiber collimator, 6 is collimation lens, 7 are the axis of symmetry of transmission medium (being matrix), and 8 is the cylindrical hollow part of transmission medium, and 9 is the upper surface of transmission medium, 10 is the lower surface of transmission medium, 11 is the column annular section in the middle of the transmission medium, and 12 is the plated film on the transmission medium upper surface, and 13 is the output window of light beam, 14 is the light beam steering element, 15 is input end, and 16 is output terminal, and 17 is transmission medium.
[embodiment]:
Empty state fiber rotation connector in embodiment 1, the single channel
As shown in Figure 1, empty state fiber rotation connector in the single channel provided by the invention is made of input end 15, output terminal 16 and transmission medium 17.
The lower surface 10 of transmission medium is a conical surface, this conical surface is provided with an output window 13, output window is the plane parallel with upper surface 9, the surface of output window is provided with anti-reflection film, be provided with light beam steering element 14 simultaneously at upper surface with the output window correspondence position, this light beam steering element is a diffraction optical element, as reflective line style grating, binary optical elements etc.Light beam steering element area is less, only is covered in the zone of window 13 tops.
It between the upper surface 9 of transmission medium and the lower surface 10 the column annular section 11 in the middle of the transmission medium.
Light is propagated in transmission medium, in fixing position output.When parallel beam is propagated in matrix, light beam is oblique propagation, for the ease of the output terminal receiving beam, need increase a light beam steering element at the output port place, be used for the parallel beam of oblique propagation transferred perpendicular to the direction of body upper surface propagating, light beam after the turnover is still parallel beam, can come directed turnover with grating.Lower surface is a conical surface, but at the output port place, need be arranged to the plane, is convenient to output, shown in Figure 1B.
The circulation way of light beam in transmission medium is earlier by entering into the annular matrix upper surface behind the optical grating diffraction, propagation through matrix afterwards arrives the matrix lower surface, passes through the total reflection of lower surface again, the reflected back upper surface, by entering matrix after the upper surface total reflection, propagate successively.The upper surface of annular matrix reflects the light beam of being propagated by lower surface again owing to promptly will receive irradiating light beam, so upper surface need increase by 4～5 tunics, the effect of film is the incident light that sees through from grating, and the light beam of total reflection matrix inside.Lower surface is mainly used in folded light beam, so it is without plated film, but is used for output beam at fixing output port place, window place plating anti-reflection film.
As shown in Figure 2, input end 15 is made of optical fiber 1, optical fiber collimator 2 and coupling blazed grating 3.The effect of optical fiber collimator 2 is that the light of optical fiber 1 output is become parallel beam, coupling blazed grating 3 is a sub-wave length grating, its effect is that coupling light in the transmission medium of optical fiber collimator output gone, it utilizes the senior diffraction of blazed grating, and luminous energy is mainly concentrated in certain order diffraction light.Grating satisfies grating equation dsin θ=m λ, and θ is the angle of diffraction of diffraction light, and d is the grating cycle, the order of diffraction of m for setting, and this order of diffraction has big angle of diffraction θ, so that after entering matrix, can satisfy the requirement of light beam total reflection.
Input end 15 be arranged on the top of transmission medium and with coupling blazed grating 3 towards the upper surface 9 of transmission medium, and the score line of coupling blazed grating is parallel with the radial direction of input end present position, input end can rotate around the symcenter axle 7 of annular transmission medium, the anglec of rotation is unrestricted, and optical fiber collimator remains relative static with the coupling blazed grating.
As shown in Figure 3, output terminal 16 is made of collimation lens 6, optical fiber collimator 5 and optical fiber 4.Towards output window 13 and be fixed on output window below, output terminal 16 stationkeeping do not move in a circle output terminal 16 with collimation lens 6.The effect of collimation lens 6 is that the light beam by transmission medium output is focused in the optical fiber collimator 5, again by optical fiber collimator 5 beam propagation in optical fiber 4, so that output.
As Fig. 4, shown in Figure 5, transmission medium is made of the annular matrix of a hollow, and 7 is the symcenter axle of transmission medium, also is the axis of symmetry of total system, and 8 is the cylindrical hollow part of transmission medium.The size of matrix is set as required, and such as be used for light when interconnection at rotary connector, matrix is of a size of a centimetre magnitude.The upper surface 9 of transmission medium is a plane, is coated with multilayer film 12 on it, and the principle that the number of plies of film and refractive index are selected is the total reflection that guarantees high transmittance and satisfy light beam.There is relation at the incident angle of two parameters and light beam, the material of matrix and thickness, lower surface inclination angle etc.Light beam is incident on the A point on the round I, and enters in the matrix at this point, and light beam propagates into B point on the lower surface circle II with the form of geometrical optics in matrix afterwards, and returns matrix at the B point reflection.For control bundle, as long as the conical surface is set suitable subtended angle, light will return 1 C on the upper surface circle I from the B point reflection.The center of supposing upper surface circle I is O
1, the center of circle II is O on the lower surface
2, O
1, O
2All be positioned on the central shaft, the plane of crossing circle II is designated as the plane III.Incidence point A is projected as A ' planar I II's, and this moment, A ' was on circle II, and made ∠ BAA '=α, ∠ BO
2A '=β, the subtended angle of the conical surface are γ.By the direction of propagation of optical grating diffraction light beam as can be known, the diffraction direction of main pole high light line is perpendicular to the grating score line, and when the score line of grating 3 is parallel to the radius at incident end place, satisfies
For the conical surface, the normal that is located at the B point place conical surface is
Reflective relation by how much is known:
Three-way coplane, and
About
Symmetry.Utilize above geometric relationship can calculate tan γ=sin β tan α.
The physical significance of angle beta is meant that light beam reflexes to lower surface from upper surface, the primary event of being experienced is in the shared angle of circumferencial direction projection, for the better propagation of control bundle, confine optical beam is behind process integer secondary reflection, just in time can rotate a circle, be β=2 π/N, N is the total order of reflection of light beam.The physical significance of angle [alpha] is meant the reflection angle of light beam at upper surface, also is the incident angle of light beam when just having entered matrix.By grating formula as can be known, the angle of diffraction light is θ, after light beam enters the rete of upper surface so, is subjected to the influence of refraction law, n
0Sin θ=n
iSin θ
i=n
1Sin α, n in the formula
i, θ
iBe the refractive index and the refraction angle of i tunic, formula can obtain α thus.By the triangle relation formula as can be known, β, α can determine suitable γ, propagate along direction initialization to guarantee light beam.
Suppose R
1The radius of representative circle I, R
2The radius of representative circle II, the matrix internal diameter is r
1, the matrix external diameter is r
2, h
1Be illustrated in the thickness of matrix inner radius, h
2Be illustrated in the thickness of matrix outer radius, have relation so
h
1＝R
1[tanβ·cotα+(1-cosβ)/(tanγcosβ)]+(R
1-r
1)/tanγ，
h
2＝R
1[tanβ·cotα+(1-cosβ)/(tanγcosβ)]-(R
1-r
2)/tanγ。
h
1, h
2Constituted the machined parameters of matrix with γ.Choosing of the inside and outside radius of matrix is not too strict, satisfies r
1＜R
1＜R
2＜r
2
As shown in Figure 5, the inside radius of the annular matrix of transmission medium is r
1, external radius is r
2Matrix is an entity, and material is common optical waveguide material, has low absorb, hang down chromatic dispersion, isotropic characteristics.When rotating on the circumference of input end in radius r, input beam is incident on this circumference, and light beam should be perpendicular to radially, rather than point to radially, light beam enters matrix inside after seeing through rete, through matrix transmission, lower surface total reflection, upper surface total reflection, matrix transmission or the like, transmission is gone down successively afterwards.Light beam is every through primary event, the direction of reflection meeting deviation, thus be positioned at diverse location at the reflection spot of upper and lower surface light beam, but circumferentially.
The light beam of propagating in the matrix is by the upper surface reflex time, and upper surface is the plane, and it makes light beam propagate to the direction away from central shaft, up to being reflected by lower surface; Light beam is by the lower surface reflex time, because reflecting surface is towards central shaft, so light beam can be reflected to the direction near optical axis.Because it is less in the distance of radial direction skew that light beam arrives lower surface from upper surface, can be referring to Fig. 2, the radius of circle II is slightly larger than the radius of round I among the figure II, and light beam does not also propagate into inside and outside wall just by lower surface reflected back upper surface, so. light beam can not propagate on the inside and outside wall of matrix.
The size of matrix can be made a centimetre magnitude, also can make large scale, required size during as CT scan.For matrix or waveguide centimetre more than the magnitude, light beam can be by the method research of geometrical optics.
The light of input end 15 outputs, its chief ray are perpendicular to the radial direction at place, and light enters into matrix inside after seeing through the film of body upper surface.Light beam form with geometrical optics in matrix is propagated, and arrives lower surface afterwards.When light beam arrives lower surface, satisfy the condition of total reflection,, be reflected back toward matrix inside so light beam at lower surface total reflection can take place.The propagation of process matrix arrives upper surface more afterwards.The plated film of upper surface can satisfy the light beam total reflection condition, so light beam by the upper surface total reflection, reflexes to matrix inside.Reflection successively arrives the light beam steering element up to light beam afterwards, outputs to output terminal after being deflected.
Input end 15 is along central shaft 7 rotations, in rotary course, the incidence point of light beam changes at any time, and (but the direction of light beam is always pointed to the direction of advancing when input end rotates, so situation that does not exist light beam to propagate backward), though incidence point difference, but input end remains its grating score line in rotary course identical or parallel with the radial direction of position, and the chief ray of light beam that can guarantee input end output like this is always perpendicular to radially.Indirect like this assurance the incident angle of light when entering matrix remain unchanged, so the angle that light is propagated in matrix is identical.
Because parallel beam propagates in matrix, through still being directional light after the reflection, so light beam steering element 14 can be the parallel beam output window 13 of vertically transferring.
Core of the present invention is the accurate processing at the inclination angle of the thickness of transmission medium matrix and the lower surface conical surface, and the grating processing (referring to aforementioned transmission medium CALCULATION OF PARAMETERS) of the integrated and input end of the optical coating of body upper surface, light beam steering element.Wherein grating 3 can adopt the described radiation type blazed grating of patent CN200910228451.X, and it cooperates with the described rotary connector of this patent.
When assembling, note the position and the direction of input end, the groove direction that should satisfy grating is with residing radially identical or parallel.
Empty state fiber rotation connector in embodiment 2, the hyperchannel
As Fig. 6, shown in Figure 7, the making principle of empty state fiber rotation connector is identical with single channel in the hyperchannel.The area of the matrix that the single channel connector is occupied is a ring, occupies from radius r
1To r
2Between circular cylinder part (as shown in Figure 5), light beam can not propagate into beyond this cylinder.So, the empty state fiber rotation connector is to be combined by empty state fiber rotation connector in the single channel that differs in size among two that make on same matrix and the above embodiment 1 in the hyperchannel, wherein in Jin Lin two single channel connectors the external diameter of inboard connector less than the internal diameter of the connector in the outside, to guarantee that each passage does not disturb mutually, as shown in Figure 7.Because hyperchannel can realize transmitted in both directions, so according to the requirement of transmission direction, the upper surface of each single channel connector can also can be respectively towards heteropleural towards homonymy.
The empty state fiber rotation connector also can form by the empty state fiber rotation connector is nested in the single channel that differs in size among two and the above embodiment 1 in the hyperchannel, wherein in Jin Lin two single channel connectors the external diameter of inboard connector smaller or equal to the internal diameter of the connector in the outside.Because hyperchannel can realize transmitted in both directions, so according to the requirement of transmission direction, the upper surface of each single channel connector can also can be respectively towards heteropleural towards homonymy.
Provided three-channel situation among the figure, S1, S2, S3 are respectively input end 1, input end 2, input end 3.O1, O2, O3 are respectively output terminal 1, output terminal 2, output terminal 3.T1, T2, T3 are respectively passage 1, passage 2, passage 3, wherein passage 1 is the transmission signals that makes progress, passage 2,3 downward transmission signals, the fiber rotation connector that belongs to the multichannel bidirectional transmission, its centre is empty, be used for media such as transmission oil, water, vapour, place human body etc. when also can be used for CT scan.Because passage 1 is different with the signal propagation direction of passage 2, passage 3, so its output face is opposite.Three passages are positioned at different positions, do not disturb mutually.
Claims (5)
1. empty state fiber rotation connector in a kind, it is characterized in that this connector comprises the input end that is made of first optical fiber, first optical fiber collimator and coupling blazed grating, the output terminal that constitutes by collimation lens, second optical fiber collimator and second optical fiber, and the transmission medium of the annular between input end and the output terminal, input end, output terminal and transmission medium constitute empty state fiber rotation connector in the single channel jointly; Described transmission medium is made of an annular matrix, and the upper surface of transmission medium is a plane, and the lower surface of transmission medium is a conical surface, and this conical surface is provided with an output window, and described output window is parallel with upper surface; Output terminal is fixed on the below of output window, and when placing, output terminal is perpendicular to output window, and collimation lens is used for receiving beam near output window; Simultaneously be provided with the light beam steering element at upper surface with the output window correspondence position; Input end is arranged on the top of transmission medium, and when placing, input end is perpendicular to the upper surface of transmission medium, and with an end of coupling blazed grating near the transmission medium upper surface; The score line of blazed grating of being coupled simultaneously is parallel with the radial direction of input end present position; Input end can rotate around the axis of symmetry of transmission medium and first optical fiber collimator keeps relative static with the coupling blazed grating.
2. empty state fiber rotation connector in according to claim 1 is characterized in that the upper surface of described transmission medium is coated with 4～5 tunics.
3. empty state fiber rotation connector in according to claim 1 and 2, the surface that it is characterized in that described output window is provided with anti-reflection film, with the light beam steering element of output window correspondence position upper surface be reflective line style grating or binary optical elements in the diffraction optical element.
One kind by claim 1 described in empty state fiber rotation connector in the hyperchannel that constitutes of empty state fiber rotation connector, it is characterized in that the empty state fiber rotation connector forms by the empty state fiber rotation connector is nested at least two described single channels that differ in size of claim 1 in the described hyperchannel, wherein the external diameter of inboard connector is smaller or equal to the internal diameter of the connector in the outside in Jin Lin two single channel connectors, and the upper surface of the transmission medium of each single channel connector is towards homonymy or respectively towards heteropleural.
One kind by claim 1 described in empty state fiber rotation connector in the hyperchannel that constitutes of empty state fiber rotation connector, it is characterized in that empty state fiber rotation connector in the described hyperchannel is that the empty state fiber rotation connector combines in two of making and the above described single channel that differs in size of claim 1 thereof on same matrix, wherein the external diameter of inboard connector does not disturb to guarantee each passage mutually less than the internal diameter of the connector in the outside in Jin Lin two single channel connectors; Because hyperchannel can be realized transmitted in both directions, according to the requirement of transmission direction, the upper surface of the transmission medium of each single channel connector is towards homonymy or respectively towards heteropleural.
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| CN201010103099XA CN101788699B (en) | 2010-02-01 | 2010-02-01 | Hollow fiber optic rotary joint |
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|---|---|---|---|
| CN201010103099XA CN101788699B (en) | 2010-02-01 | 2010-02-01 | Hollow fiber optic rotary joint |
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| CN101788699B true CN101788699B (en) | 2011-07-20 |
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| EP2788804A4 (en) | 2011-12-09 | 2015-08-05 | Hewlett Packard Development Co | Optical connections |
| CN103217746B (en) * | 2012-01-19 | 2016-01-20 | 中兴通讯股份有限公司 | Light path switch and control method thereof |
| CN103149642B (en) * | 2013-03-22 | 2014-10-15 | 上海理工大学 | Off-axis optical fiber rotary connector |
| US9473239B2 (en) * | 2013-08-22 | 2016-10-18 | Corning Cable Systems Llc | Systems and methods for aligning an optical interface assembly with an integrated circuit |
| CN103472539B (en) * | 2013-09-04 | 2016-06-15 | 中国电子科技集团公司第八研究所 | A kind of method of hollow light slip ring and transmission optical signal thereof |
| CN108710177B (en) * | 2018-04-20 | 2020-02-07 | 天津大学 | Off-axis optical fiber rotary connector |
| CN108809424A (en) * | 2018-06-21 | 2018-11-13 | 安徽光纤光缆传输技术研究所(中国电子科技集团公司第八研究所) | A kind of method and device for realizing open-core type optical signal rotary transfer |
| CN110361826B (en) * | 2019-04-24 | 2021-05-11 | 长春理工大学 | Shafting high-speed information transmission device with memory alloy driving main backup structure |
| CN111708120B (en) * | 2020-07-01 | 2021-04-16 | 武汉理工大学 | High-speed multichannel optical fiber rotary connector |
| CN112045320A (en) * | 2020-09-03 | 2020-12-08 | 诺伯特智能装备（山东）有限公司 | CO for nonmetal processing2Five-axis laser cutting machine and working method thereof |
| CN113835157A (en) * | 2021-09-10 | 2021-12-24 | 中国兵器装备集团上海电控研究所 | Eccentric optical fiber rotary transmission device |
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| CN1017000B (en) * | 1986-09-02 | 1992-06-10 | 休斯航空公司 | Abaxial optical communication system |
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