CN1110715C - Lateral luminous optical cable and its preparing equiment and preparing method - Google Patents
Lateral luminous optical cable and its preparing equiment and preparing method Download PDFInfo
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- CN1110715C CN1110715C CN99106741A CN99106741A CN1110715C CN 1110715 C CN1110715 C CN 1110715C CN 99106741 A CN99106741 A CN 99106741A CN 99106741 A CN99106741 A CN 99106741A CN 1110715 C CN1110715 C CN 1110715C
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Abstract
The present invention relates to a device for preparing optical cables, which sequentially comprises a supply source with a plurality of plastic optical fiber stranded wires in moving directions of optical fibers, a micro-bending shaper used for alternately receiving each of the stranded wires and forming a plurality of uniform micro-bending patterns in each stranded wire and a stranded wire director used for receiving a plurality of micro-bending stranded wires and making adjacent stranded wires contact each other. The device preferably also comprises a wrapping device wrapping sheath materials on the peripheries of the stranded wires contacting each other. The present invention also provides a transversal luminous optical cable and a relevant preparation method thereof, wherein the optical cable has a plurality of stranded wires, and a plurality of microbending places are formed in each of the stranded wires.
Description
Technical field
The application relates to a kind of optical cable, relates in particular to a kind of lateral luminous optical cable, and it at least can be lateral luminous along cable length from a light source.
Background technology
Generally know that, can be used for the luminous flux that laterally penetrates in the optical cable or leak such as fields such as aesthetic illumination or safety lightings.Usually, optical cable has many individual light twisted wire or the optical fiber twisted wires for example made by plastics or glass, and transparent or semitransparent sheath is restrainted their together, and is installed at least one end optical coupled that has a light source and optical cable at least.So, the whole length that spreads all over optical cable from the light of light source, and laterally penetrate from jacket surface.In various application, use this light that laterally penetrates then, comprise swimming pool, hot spring, pond or waterfall are carried out back-lighting or surface illumination etc.Compare with other lighting engineering (for example, neon tube lamp, incandescent lamp or other discrete light source), optical cable has many advantages, and is flexible such as optical cable, avoid electric shock and The noise, and cost is low or the like.
The optical cable that uses in these application of being everlasting can adopt a kind of light scattering design, so that it is lateral luminous to strengthen optical cable.For example, can close many individual twisted wire bundles with twisted together.Specifically, this prior art generally twists into a son bundle with (for example about 7-14 bar twisted wire) individual optical fiber twisted wire.Implementation method normally around fixing clamping mold (closing die) rotation multifiber, is made the son bundle.Then, (for example about 3-10 bar) many strips bundle is screwed in the clamping mold of fixing, make optical cable (for example, approximately comprising the individual optical fiber twisted wire of 40-140 bar).Because this technology mainly depends on tension force and is added in power on the clamping mold,, and break and to reduce the homogeneity in individual twisted wire crack greatly so any breaking of taking place in the fibre cladding generally appears in the grouping of being made up of 7-14 bar optical fiber twisted wire.This twisting technology itself has also weakened the quick ejaculation of light, and homogeneity that almost can not controlling packet layer structure.
Following United States Patent (USP) has been described these twisting technology for example: No. 5,345,531, the United States Patent (USP) of people such as Keplinger invention, and its denomination of invention is " optical fibre illumination equipment and a method "; No. 5,617,497, the United States Patent (USP) of Kingstone invention, its denomination of invention is " fiber optic cable plant of transverse illumination and a manufacture method thereof "; No. 5,333,228, the United States Patent (USP) of Kingstone invention, its denomination of invention is " fiber optic cable plant of transverse illumination and a manufacture method thereof ".
In addition, when using these prior aries, the sizable back of the body tension force that acts on the individual twisted wire generally can make the twisted wire elongation, and when attempting control reverse (back lash), even bigger back of the body tension force can appear, cause total back of the body tension force in the scope that approximately 850-1500 restrains.So big back of the body tension force has influenced attenuation loss again greatly.For example, the initial decay characteristic of plastic optical fiber twisted wire is approximately 135 decibels/km, and the cumulative function of back of the body tension force can become about 1200 decibels/km to 2700 decibel/km to the decay of plastic optical fiber twisted wire, and this is the performance of the individual twisted wire of influence obviously.
Being used to strengthen other lateral luminous technology comprises twisted wire is launched into flat belt-like, and formation is located the track of usefulness for optical cable or part optical cable along it, the United States Patent (USP) 4 of people such as Awai invention wherein, 763, No. 984 last technology is described, its denomination of invention is " light fixture and a method ", and the United States Patent (USP) 5 of Kingstone invention, a technology is described after 617,496 pairs, and its denomination of invention is " fiber optic cable plant of transverse illumination and a manufacture method thereof ".
These prior aries generally also lack uniformity of luminance on the whole length of optical cable, optical fiber ribbon cable or optical cable track.In addition, need make optical cable with complicated and expensive system usually, optical fiber ribbon cable and optical cable track, the United States Patent (USP) of Kingstone invention has been described such equipment and system 5,376, No. 201, and its denomination of invention is " method of making image amplifier ".
Summary of the invention
Under above-mentioned background, the present invention has advantageously provided a kind of equipment and method that is used to prepare lateral luminous optical cable, described optical cable generally makes light evenly distribute on its whole length so that light laterally penetrates from the optical cable outside surface, and from the horizontal a large amount of light (for example, the light of light intensity increase) that penetrates of the outside surface of optical cable.By strengthening with a similar light source or even distribution of control and light intensity, the user of optical cable can advantageously improve the luminous mass of optical cable with regard to required application.The present invention also advantageously provided a kind of cheaply, better simply lateral luminous optical cable prepares equipment and method, wherein said lateral luminous optical cable generally has the light intensity of even light distribution and increase.In addition, the present invention has advantageously provided a kind of equipment and method, they can be controlled can influence the homogeneity in the covering crack of individual plastic optical fiber twisted wire, and reduces the attenuation loss of individual optical fiber twisted wire thus greatly, and the overall attenuation that forms many twisted wires of lateral luminous optical cable.
Specifically, provide a kind of equipment that is used to prepare optical cable, every twisted wire of bar plastic optical fiber twisted wire has a plurality of microbends more than the described optical cable, and the pattern of microbend is quite even, can increase the light quantity that optical cable laterally evenly penetrates thus.Wherein, described equipment comprises:
Supply source, it has a plurality of plastic optical fiber twisted wires;
Little o ing device, it is positioned at the downstream of described supply source, and is installed into by indivedual every the twisted wires that receive in many plastic optical fiber twisted wires of spaced relationship, is used for forming a plurality of microbends at every twisted wire of many twisted wires, and the pattern of microbend is quite even;
The twisted wire guide piece, it is positioned at the downstream of described little o ing device, and is installed into every the twisted wire that receives many microbend twisted wires, is used for the twisted wire of a plurality of intervals and microbend is guided into the relation of adjacent contact; With
Wrap device, it is positioned at the downstream of described twisted wire guide piece, and be used for sheath is wrapped in around the twisted wire of many adjacent contact, thereby form the optical cable of individual optical fiber twisted wire with many microbends,
Wherein, described little o ing device comprises an outer cover, be formed with the perforate at a plurality of intervals in the outer cover, place an independent optical fiber twisted wire in each hole of a plurality of perforates, described little o ing device also comprises the twisting device, it is installed into when every twisted wire in many twisted wires is arranged in a plurality of perforate and every twisted wire adjacent contact of many twisted wires, be used for every twisted wire of many twisted wires is generally continuous twisting, thereby when many optical fiber twisted wires are mobile downstream, in the optical fiber twisted wire, form a plurality of patterns microbend quite uniformly, described twisting device comprises a motor, one driving shaft and an optical fiber contact component, wherein said driving shaft links to each other with described motor, by motor it is rotated driving, and described optical fiber contact component links to each other with described driving shaft, is used for every twisted wire adjacent contact with many twisted wires.
In foregoing invention, described sheath can comprise an optical cable inner sheath, and described equipment can also comprise packing device, and described packing device is positioned at the downstream of described Wrap device, is used for wrapping up described optical cable inner sheath with a cable outer sheath.In addition, described equipment can also comprise the optical cable pulling off device, it is positioned at the downstream of described packing device, be used to pull out the optical cable that constitutes by many micro-bending optical fiber twisted wires through parcel, described many micro-bending optical fiber twisted wires are from described supply source, and the described little o ing device of process, described guide piece, described Wrap device and described packing device; And the optical cable gathering-device, it is positioned at the downstream of described optical cable pulling off device, is used to collect the optical cable with many micro-bending optical fiber twisted wires.
In addition, in foregoing invention, the material of described Wrap device can comprise a kind of in mylar or the teflon at least, and with material overlapping be wrapped in many microbend twisted wires around.
In addition, in foregoing invention, described contact component can comprise a contact ring of being made by resilient material.
In addition, in foregoing invention, described equipment can also comprise driving control device, and described driving control device links to each other with described gathering-device with described little o ing device, described pulling off device at least, is used to control the driving to them.Described driving control device can comprise synchronous device, is used for the described little o ing device of driven in synchronism, described pulling off device and described gathering-device.
Used term " microbend " is meant little distortion or the crack in the fibre cladding of individual optical fiber twisted wire in full.These microbends are preferably by clockwise or be rotated counterclockwise with the individual optical fiber twisted wire of twisting and produce.It is that per minute moves 1 to 50 meter and twisting 1-360 circle that rotation or twisting are closed, and.Make the total back of the body tension force that is added on any individual optical fiber twisted wire S be preferably 100 to 300 grams with the machinery on the supply source, electric or electromechanical braking system, for example, control reverse by spool work.This can be controlled at attenuation loss 100 to 500 decibels/km, has strengthened decay control.
The present invention has also advantageously provided a kind of lateral luminous plastic optical fiber cable of optical cable that is used to improve.Described optical cable comprises:
Many plastic optical fiber twisted wires, every twisted wire all is formed with a plurality of microbends through independent twisting, and the pattern of microbend is quite even; With
At least one sheath, described jacket-shaped be formed in many plastic optical fiber twisted wires around.
In foregoing invention, described optical cable can also comprise an inner core, described many plastic optical fiber twisted wires be positioned at described inner core around.
In addition, in foregoing invention, described at least one sheath can comprise an inner sheath and an oversheath, and described inner sheath is by at least a the making in mylar or the teflon, and described over gloves is made by translucent plastic material.
In addition, in foregoing invention, every twisted wire in described many twisted wires generally all extends in parallel to each other, and every twisted wire in perhaps described many twisted wires generally all is parallel to inner core and extends, and every twisted wire in many twisted wires of described inner core twisting.
In addition, in foregoing invention, described many twisted wires can comprise a subclass that is made of many twisted wires at least, and make many mutual twistings of microbend twisted wire; Perhaps many twisted wires comprise a subclass that is made of many twisted wires at least, and make many mutual twistings of microbend twisted wire and around described inner core twisting.
In addition, in foregoing invention, described inner core can be made by a kind of trnaslucent materials.Described inner core can comprise a translucent pipe.Described inner core can also comprise a kind of fluid, and described fluid is arranged in described translucent pipe.Inner core can also comprise a kind of fluid such as water, and it is beneficial in fountain, pond, hot spring or other water and uses in the illumination application.
According to the present invention, also provide a kind of method that is used to prepare optical cable.Said method comprising the steps of:
By every twisted wire in many plastic optical fiber twisted wires of independent twisting, in every twisted wire, form a plurality of microbends;
With every twisted wire in many twisted wires be positioned at least with many twisted wires in another is adjacent; And
Around many microbend twisted wires, form sheath.
In said method, the pattern of described microbend can be quite even.And can comprise the step that many plastic optical fiber twisted wires are provided by spaced relationship.
Can advantageously the equipment and the method that are used at the quite uniform microbend of individual optical fiber twisted wire formation pattern be used with existing optical cable preparation method and existing cable configuration type, so that on these prior art bases, strengthen, and improve lateral luminous homogeneity to lateral luminous control.For example, the size (this is that existing at present optical cable is made desired) by reducing back of the body tension force can improve homogeneity, and strengthen the control to decay.This can control total covering crack to a greater extent, improve luminous homogeneity again, and provides more uniform lateral luminous.
Description of drawings
Narrated characteristics more of the present invention, advantage and benefit, along with knowing other characteristics of the present invention, advantage and benefit below in conjunction with the description of accompanying drawing, accompanying drawing has:
Fig. 1 is a block scheme, shows the equipment that is used to prepare lateral luminous optical cable according to first embodiment of the invention;
Fig. 2 is a skeleton view, shows the equipment that is used to prepare lateral luminous optical cable according to first embodiment of the invention;
Fig. 3 is a skeleton view, shows the little o ing device of equipment that is used for preparing lateral luminous optical cable according to first embodiment of the invention;
Fig. 4 is a partial elevation view of amplifying, and shows the little o ing device that is used for preparing the equipment of lateral luminous optical cable according to of the present invention;
Fig. 5 is a side view, shows the little o ing device that is used for preparing the equipment of lateral luminous optical cable according to of the present invention;
Fig. 6 is a block scheme, shows the equipment that is used to prepare lateral luminous optical cable according to second embodiment of the invention;
Fig. 7 is a skeleton view, shows little o ing device, twisted wire bundle twisting device and the twisted wire guides of equipment that is used for preparing lateral luminous optical cable according to second embodiment of the invention;
Fig. 8 is a skeleton view, shows the optical cable according to the present invention first lateral luminous optical cable embodiment, and this optical cable has many twisted wires, all is formed with a plurality of microbends in every twisted wire;
Fig. 9 is a sectional view, shows the optical cable according to the present invention first optical cable embodiment, and this optical cable has many twisted wires, all is formed with a plurality of microbends in every twisted wire, and this figure is that straight line 9-9 along Fig. 8 intercepts;
Figure 10 is a sectional view, shows the optical cable according to the present invention first optical cable embodiment, and this optical cable has many twisted wires, all is formed with a plurality of microbends in every twisted wire, and this figure is that straight line 10-10 along Fig. 8 intercepts;
Figure 11 is according to a twisted wire in the optical cable of the present invention, is formed with a plurality of microbends in the twisted wire;
Figure 12 is a sectional view, shows according to a twisted wire in the optical cable of the present invention, is formed with a plurality of microbends in the twisted wire, and this figure is that straight line 12-12 along Figure 11 intercepts;
Figure 13 is a sectional view, shows according to a twisted wire in the optical cable of the present invention, is formed with a plurality of microbends in the twisted wire, and this figure is that straight line 13-13 along Figure 11 intercepts;
Figure 14 is a partial view, shows the optical cable according to the present invention second optical cable embodiment, and this optical cable has many twisted wires, all is formed with a plurality of microbends in every twisted wire;
Figure 15 is a sectional view, shows the optical cable according to the present invention second optical cable embodiment, and this optical cable has many twisted wires, all is formed with a plurality of microbends in every twisted wire, and this figure is that straight line 15-15 along Figure 14 intercepts;
Figure 16 is a partial view, shows the optical cable according to the present invention the 3rd optical cable embodiment, and this optical cable has many twisted wires, all is formed with a plurality of microbends in every twisted wire;
Figure 17 is a sectional view, shows the optical cable according to the present invention the 3rd optical cable embodiment, and this optical cable has many twisted wires, all is formed with a plurality of microbends in every twisted wire, and this figure is that straight line 17-17 along Figure 16 intercepts;
Figure 18 is a partial view, shows the optical cable according to the present invention the 4th optical cable embodiment, and this optical cable has many twisted wires, all is formed with a plurality of microbends in every twisted wire;
Figure 19 is a sectional view, shows the optical cable according to the present invention the 4th optical cable embodiment, and this optical cable has many twisted wires, all is formed with a plurality of microbends in every twisted wire, and this figure is that straight line 19-19 along Figure 18 intercepts;
Figure 20 is a partial view, shows the optical cable according to the present invention the 5th optical cable embodiment, and this optical cable has many twisted wires, all is formed with a plurality of microbends in every twisted wire;
Figure 21 is a sectional view, shows the optical cable according to the present invention the 5th optical cable embodiment, and this optical cable has many twisted wires, all is formed with a plurality of microbends in every twisted wire, and this figure is that straight line 21-21 along Figure 20 intercepts;
Figure 22 is a skeleton view, shows the optical cable according to another embodiment of the present invention, and this optical cable is quite flat band shape, has many individual optical fiber twisted wires, all is formed with a plurality of microbends in every twisted wire.
Figure 23 shows the propagation synoptic diagram with the light of θ angle incident optical.
Figure 24 shows the relation curve of refractive index and wavelength.
Embodiment
Hereinafter with reference to the accompanying drawing of describing preferred embodiment of the present invention, the present invention is described more fully.But the present invention can implement by many different forms, it should be interpreted as the embodiment that is confined to here to be narrated.On the contrary, it is in order to make disclosure fully and fully that these embodiment are provided, and scope of the present invention is all imparted to those skilled in the art.Represent alternative embodiment with apostrophe or a plurality of apostrophe.Identical label is represented identical parts all the time.
Fig. 1-2 shows the equipment 30 that is used to make optical cable C according to of the present invention, and each bar twisted wire of bar plastic optical fiber twisted wire S all has a plurality of microbend B more than the optical cable C, and the pattern of microbend is quite even, can improve optical cable C thus laterally and the light quantity that evenly penetrates.Equipment 30 preferably includes a supply source 40, and supply source 40 has a plurality of spools 41, is wound with plastic optical fiber twisted wire S on the spool and is fixed on the base of determining framework 45.Spool 41 is positioned on the framework 45, and each spool 41 is preferably all controlled by a spool brake system, for example, understand as those skilled in the art, spool 41 is carried out motor or Motor Control, and it is linked to each other with control module 25, so that control " reverse " and the tension force of individual twisted wire S.Supply source 40 preferably also comprises a twisted wire spacer 46, among the figure it is drawn as the twisted wire spaced ring that for example is made of metal, and is formed with the guide hole or the perforate 47 at a plurality of intervals in the spaced ring, is used to isolate and guides individual twisted wire from supply source 40.
Equipment 30 preferably also has little o ing device, for example preferably provide by little o ing device 50, it preferably is positioned at the downstream of supply source 40, and be installed into by indivedual every the twisted wires that receive in many plastic optical fiber twisted wires of spaced relationship, be used for forming a plurality of microbend B at every twisted wire of many twisted wire S, the pattern of microbend is (referring to Fig. 3-5) quite evenly.Little o ing device 50 preferably includes an outer cover 51 that for example is fixed on the ground base 52, be formed with the perforate 53 at a plurality of intervals in the outer cover 51, outer cover is passed in perforate, for example passes location gathering ring 54, so as in each of a plurality of perforates location single fiber twisted wire S.Little o ing device 50 also comprises twisting device 55, it is installed into when twisted wire S is arranged in a plurality of perforate 53 and every twisted wire adjacent contact, be used for every twisted wire of many twisted wire S is generally continuous twisting, thereby when many optical fiber twisted wire S are mobile downstream, in twisted wire, form a plurality of patterns microbend B quite uniformly.For example, twisting device 55 can comprise motor 59, driving shaft 56 and optical fiber contact component 57, and wherein driving shaft 56 links to each other with motor 59, and motor 59 drives its rotation, and optical fiber contact component 57 links to each other with driving shaft 56, is used for every twisted wire adjacent contact with many twisted wires.Contact component 57 must comprise a contact ring 58a who is made by two kinds of resilient materials, friction-driven belts for example, contact ring is suitable for gear drive with the material that spline driven wheel 58b engages, and should not be damaged by gear, and the material that contact ring contacts with optical fiber is softer, and can produce the friction force that is enough to make the optical fiber twisting.Spline driven wheel 58b itself then is fixed on the driving shaft 56.
Preferably the twisted wire guide piece that will for example be provided by twisted wire guides 60, guidance tape or binding clasp is installed in the downstream of little o ing device 50, and be mounted to and can receive many every twisted wires among little curved twisted wire S, be used for many intervals and little curved twisted wire S are guided into the adjacent contact relation.For example, can be acquisition twisted wire guide piece with Frusto-conical outer cover 61 as shown in the figure, and this device can comprise motor 62 and rotating band 63.Also available guidance tape or other binding clasp substitute.
Preferably the Wrap device that will for example be provided by wrapper 70 is installed in the downstream of twisted wire guides 60, be used for sheath material (for example material of optical cable inner sheath J1) is wrapped in around the twisted wire S of many adjacent contact, so that form optical cable C with many little curved individual optical fiber twisted wire S.For example, wrapper 70 can comprise have lapping (such as, polyester, the belt that mylar or teflon are made etc.) cylinder 72 or spool, and parcel guides 74, its intermediate roll 72 is fixed on the bracket component 73, and parcel guides 74 is used for the lapping guiding around twisted wire bundle S.And preferably material is wrapped in overlappingly many little curved twisted wires around.
In addition, the packing device that is for example provided by wrapper 80 can also be provided equipment 30, and it is positioned at the downstream of wrapper 70, is used for cable outer sheath J2 parcel optical cable inner sheath J1.When wrapper is preferably in inner sheath J1 by hopper or guide groove translucent plastic material is wrapped in it around.A pair of conduit 82 links to each other with hopper 81 with 83, provides fluid plastic material and/or liquid coolant to it.Optical cable pulling off device 90 is installed in the downstream of wrapper 80, be used to pull out the optical cable C that constitutes by many microbend fiber twisted wire S through parcel, here as the skilled person understands, optical cable pulling off device 90 is preferably provided by optical cable puller 90 or Track Type device, described many microbend fiber twisted wires then are from supply source 40, then by little o ing device 50, twisted wire guides 60, wrapper 70 and wrapper 80.Optical cable puller 90 preferably includes the driving motor 92 that is used to drive a plurality of head rolls 94.A pair of travelling belt 95 and 96 is installed on the head roll, is used for contacting with the oversheath J2 of optical cable C.
In addition, the optical cable gathering-device is installed in the downstream of optical cable puller 90, is used for collecting the optical cable with many microbend fiber twisted wire S with control mode, wherein the optical cable gathering-device is preferably provided by spool gatherer 100.Spool gatherer 100 preferably includes driving motor 102, and be used for rotation and drive spool, thus rolling optical cable C.Spool gatherer 100 preferably also comprises optical cable guides 105, is used for during the spool rotation optical cable being directed to spool.Optical cable guides 105 preferably includes motor 106 and eyelet 108, and wherein motor 106 is fixed on the bracket component 107, and eyelet 108 links to each other with motor 106 by drive chain or other driving link.During rolling, eyelet 108 advantageously moves along bracket component 107, thereby reposefully, systematically optical cable C is collected on the spool.
In addition, equipment 30 preferably has driving control device, and for example control module 25.As the skilled person understands, control module 25 comprises one or more treatment circuits (for example microprocessor) and/or relevant Control Software.Control module 25 links to each other with little o ing device 50, optical cable puller 90 and spool gatherer 100 at least, is used to control the driving to these devices.Control module 25 preferably includes synchronous device, and for example the timing synchronizer 26 that is made of hardware and/or software is used for the little o ing device 50 of driven in synchronism, optical cable puller 90 and spool gatherer 100.
Preferable that illustrate and as Fig. 6-7 for the replacement of cable configuration (referring to Figure 16-21) for example, equipment 30 ' can also comprise twisted wire bundle twisting device, it is preferably provided by for example twisted wire bundle twisting device 65, be positioned at the downstream of little o ing device 50, be used for before arranging or wrapping up inner sheath J1 ', individual twisted wire S being twisted into many strips bundle.Also the child bundle can be arranged in inner core I around.For example, twisted wire bundle twisting device 65 can comprise another guide ring 68 that is fixed on the ground support.Guide ring 68 has a ring and an outer shroud in one, and interior ring links to each other with support is static, and outer ring surface contacts with the rotating band 67 that driving motor 66 drives.Guide ring 68 has a plurality of perforates 69 therefrom to pass, and the child group of optical fiber twisted wire or son bundle pass through from perforate.When twisted wire during by perforate, rotating band 67 twisted pair wire S twistings.And many child bundles of twisted wire bundle twisting device 65 output through twisting, and the son bundle move to downstream twisted wire guides 60 ', so that begin to form optical cable C '.
Term " microbend " B that uses in full is meant little distortion or crack in the fibre cladding of individual optical fiber twisted wire S, such as breaking because of twisting under enough big power or tension force causes.These microbends are preferably by clockwise or be rotated counterclockwise with the individual optical fiber twisted wire of twisting S and produce.It is that per minute moves 1 to 50 meter and twisting 1-360 circle that rotation or twisting are closed, and.Make the total back of the body tension force on any individual optical fiber twisted wire S be preferably 100 to 300 grams with the machinery on the supply source, electric or electromechanical braking system, for example, control reverse by spool work.This just is controlled at attenuation loss 100 to 500 decibels/km, has improved decay control.
For example, as the skilled person understands, the fibre core of the most handy polymethylmethacrylate (" PMMA "), the covering of fluorinated polymer and the structure with step change type refractive index form plastic twisted strands S.Figure 16 shows the optical fiber twisted wire S with a plurality of microbend B and little distortion B1, for example when twisted wire S when the X-axis positive dirction moves with the speed of per minute 1-50 rice, the little distortion B1 that rotates around X-axis occurs 1-360 time for every meter; And occur 1-360 time for every meter around the microbend B of Z axle rotation.
Referring to Figure 23, the figure shows propagation synoptic diagram with the light of θ angle incident optical.Wherein, numerical aperture
, and n
1＞n
2Suppose that numerical aperture (" N.A. ") equals 0.54, and acceptance angle is 65 °, so can be following the bandwidth step change type index modulation of expression PMMA twisted wire:
A. intermode dispersion: the propagation delay between pattern is:
Wherein n is a fiber core refractive index, and c is that the light velocity, the Δ in the vacuum is the poor of specific refractivity, and v is normalized frequency.
B. material dispersion:, can calculate spectral content material dispersion σ in order to following equation for the visible light of 398 nanometer to 1200 nanometers
c:
Following " Cauchy " sequence has provided the PMMA refractive index of representing with wavelength:
N (2)=n
0+ A λ
-2+ B λ
-4N wherein
0=1.4779.
A＝5.0496×10
3
B=6.9486 * 10
7These data are used to calculate bandwidth of an optical fiber.Figure 24 shows the relation curve of refractive index and wavelength.Wherein, n (λ)=1.4779+5.0496 * 10
3/ λ
2-6.9486 * 10
7/ λ
4
PMMA is columniform fibre-optic waveguide, can propagate visible light wave.Mode of propagation is " light " signal mode.According to refractive index distribution curve, can make these signals is to propagate in the single mode of step change type or the multimode optical fiber in refractive index.The size of multimode optical fiber is characterized by cladding diameter and core diameter.The number of microbend changes between every meter several extremely every meter hundreds ofs are individual.When distortion or " twisting " change " close ", can cause microbending loss.Size Control is carried out in hope between radius, be tens of microns or littler so that rationally guarantee it.
The thickness of covering is for example compared to 1500 μ (micron) with fiber core refractive index 500 μ (micron) less than the thickness of fibre core, and cladding index is that 50 μ (micron) are to 300 μ (micron).Owing to there is refringence in the material that constitutes fibre core and covering, to propagate in optical fiber so import the light of microbend fiber one end, and launch into that brightness is evenly controlled or " horizontal " light, light is approximately 32 meters optical cable propagation along predetermined length.Individual optical fiber twisted wire S being carried out the method for microbend can evenly control the crack on the fibre cladding, so that influence attenuation loss by influencing the number of times that light wave passes through.This will cause the leakage of light, under the influence of microbend or little distortion, can increase or reduce light leak brightness.The refraction of light and scattering process meeting cause the high brightness light leak.S can make the optical cable C with twisted wire S that constructs with aforesaid way by the individual optical fiber twisted wire of twisting, and forms the rotation light leak according to the present invention in optical cable thus.
As preferable illustrating among Fig. 8-21, the present invention has also advantageously provided a kind of lateral luminous plastic optical fiber cable C of optical cable that is used to strengthen.Optical cable C preferably includes many aforesaid plastic optical fiber twisted wire S (referring to Fig. 8-15).Be formed with aforesaid a plurality of microbend B among every twisted wire S, the pattern of microbend is quite even.Above-mentioned twisted wire generally extends in parallel to each other, and parallel with the outrigger shaft of one or more sheath J1 and J2.Be preferably in many plastic optical fiber twisted wire S around form at least one sheath, for example interior cable jacket J1 that makes by mylar, teflon or translucent plastic material.Another kind method is shown in 14-15, before parcel and/or packaging step, individual twisted wire S ' to be twisted into the son bundle.
" can advantageously comprise an inner core I, many twisted wire S " according to other optical cable embodiment of the present invention, optical cable C and be positioned at inner core around (referring to Figure 16-21).For example, every twisted wire during many twisted wire S " generally extend in parallel to each other, and generally are parallel to the longitudinal extension of inner core I, perhaps around many twisted wire S of inner core I twisting ".As preferable illustrating among Figure 18-19, inner core I ' can also comprise a kind of fluid F such as water, and it is beneficial in fountain, pond, hot spring or other water and uses in the illumination application.For example, can be placed on fluid F among the translucent or transparent pipe T, pipe has been determined optical cable C with fluid " inner core.In addition, shown in Figure 20-21, can advantageously optical fiber bundle be lined up multilayer (two-layer or more multi-layered) bundle around inner core I, so that light can penetrate from the region R between the adjacent son bundle.The number that inner sub-bundle can use diameter small individuals optical fiber twisted wire S " constitute, and sub intrafascicular twisted wire S " is less, so that more effectively be wrapped in sheath J1 " in, and the more effectively lateral luminous amount of acquisition.
Figure 22 also shows another embodiment about optical cable C , and optical cable C is quite flat, is banded, has many individual optical fiber twisted wire S, according to being formed with a plurality of microbends in every twisted wire of the present invention.This embodiment also preferably includes a translucent oversheath J , and this sheath allows light therefrom laterally to penetrate.To understand as those skilled in the art, this structure also illustrates individual twisted wire S and is arranged side by side, and for example preferably is the adjacent contact relation, so that light can penetrate from the both sides of quite flat oversheath J .
Shown in Fig. 1-2 1, also provide the method for preparing optical cable C according to the present invention.A kind of method may further comprise the steps: form a plurality of microbend B in every twisted wire of many optical fiber twisted wire S; Make among many twisted wire S every twisted wire at least with many twisted wire S in another is adjacent; And form a sheath J1 around many microbend twisted wire S.Be preferably in and form a plurality of microbend B in every twisted wire of many optical fiber twisted wire S, the pattern of microbend generally is uniform.
The another kind of preparation method that can strengthen the lateral luminous optical cable C of luminous and uniformly light-emitting preferably includes following steps: every twisted wire among many plastic optical fiber twisted wire S that move along predetermined mobile route is generally continuous twisting, so that form microbend B in every twisted wire of many twisted wire S, the pattern of microbend generally is uniform; And restraint and close many little curved twisted wire S, so that determine lateral luminous optical cable C.
The method of the lateral luminous optical cable C of another kind of preparation preferably includes following steps: provide many plastic optical fiber twisted wire S by spaced relationship; Form a plurality of microbend B in every twisted wire of many plastic optical fiber twisted wires, the pattern of microbend generally is uniform; Every twisted wire among many intervals and the little curved twisted wire S is guided into the relation of adjacent contact; And with the material arrangements of sheath J1 around many twisted wire S.
The principle that relies on foregoing description and relevant drawings to be explained, those skilled in the art can obtain many variations of the present invention and other embodiment.Therefore, should be appreciated that the present invention is not limited to the specific embodiment that is disclosed, the inventor attempts many variations and embodiment are comprised within the scope of the appended claims.
Claims (22)
1. every twisted wire of bar plastic optical fiber twisted wire has a plurality of microbends more than equipment that is used to prepare optical cable, described optical cable, and the pattern of microbend is quite even, can increase the light quantity that optical cable laterally evenly penetrates thus, it is characterized in that described equipment comprises:
Supply source, it has a plurality of plastic optical fiber twisted wires;
Little o ing device, it is positioned at the downstream of described supply source, and is installed into by indivedual every the twisted wires that receive in many plastic optical fiber twisted wires of spaced relationship, is used for forming a plurality of microbends at every twisted wire of many twisted wires, and the pattern of microbend is quite even;
The twisted wire guide piece, it is positioned at the downstream of described little o ing device, and is installed into every the twisted wire that receives many microbend twisted wires, is used for the twisted wire of a plurality of intervals and microbend is guided into the relation of adjacent contact; With
Wrap device, it is positioned at the downstream of described twisted wire guide piece, and be used for sheath is wrapped in around the twisted wire of many adjacent contact, thereby form the optical cable of individual optical fiber twisted wire with many microbends,
Wherein, described little o ing device comprises an outer cover, be formed with the perforate at a plurality of intervals in the outer cover, place an independent optical fiber twisted wire in each hole of a plurality of perforates, described little o ing device also comprises the twisting device, it is installed into when every twisted wire in many twisted wires is arranged in a plurality of perforate and every twisted wire adjacent contact of many twisted wires, be used for every twisted wire of many twisted wires is generally continuous twisting, thereby when many optical fiber twisted wires are mobile downstream, in the optical fiber twisted wire, form a plurality of patterns microbend quite uniformly, described twisting device comprises a motor, one driving shaft and an optical fiber contact component, wherein said driving shaft links to each other with described motor, by motor it is rotated driving, and described optical fiber contact component links to each other with described driving shaft, is used for every twisted wire adjacent contact with many twisted wires.
2. equipment as claimed in claim 1, it is characterized in that described sheath comprises an optical cable inner sheath, and described equipment also comprises packing device, described packing device is positioned at the downstream of described Wrap device, is used for wrapping up described optical cable inner sheath with a cable outer sheath.
3. equipment as claimed in claim 2, it is characterized in that, also comprise the optical cable pulling off device, it is positioned at the downstream of described packing device, be used to pull out the optical cable that constitutes by many micro-bending optical fiber twisted wires through parcel, described many micro-bending optical fiber twisted wires are from described supply source, and the described little o ing device of process, described guide piece, described Wrap device and described packing device.
4. equipment as claimed in claim 3 is characterized in that, also comprises the optical cable gathering-device, and it is positioned at the downstream of described optical cable pulling off device, is used to collect the optical cable with many micro-bending optical fiber twisted wires.
5. equipment as claimed in claim 1 is characterized in that, the material of described Wrap device comprises a kind of in mylar or the teflon at least, and with material overlapping be wrapped in many microbend twisted wires around.
6. equipment as claimed in claim 1 is characterized in that, described contact component comprises a contact ring of being made by resilient material.
7. equipment as claimed in claim 1 is characterized in that, also comprises driving control device, and described driving control device links to each other with described gathering-device with described little o ing device, described pulling off device at least, is used to control the driving to them.
8. equipment as claimed in claim 7 is characterized in that described driving control device comprises synchronous device, is used for the described little o ing device of driven in synchronism, described pulling off device and described gathering-device.
9. one kind is used to improve the lateral luminous plastic optical fiber cable of optical cable, it is characterized in that described optical cable comprises:
Many plastic optical fiber twisted wires, every twisted wire all is formed with a plurality of microbends through independent twisting, and the pattern of microbend is quite even; With
At least one sheath, described jacket-shaped be formed in many plastic optical fiber twisted wires around.
10. optical cable as claimed in claim 9 is characterized in that described optical cable also comprises an inner core, described many plastic optical fiber twisted wires be positioned at described inner core around.
11. as claim 9 or 10 described optical cables, it is characterized in that, described at least one sheath comprises an inner sheath and an oversheath, and described inner sheath is by at least a the making in mylar or the teflon, and described over gloves is made by translucent plastic material.
12., it is characterized in that every twisted wire in many twisted wires generally all extends in parallel to each other as claim 9 or 10 described optical cables.
13. optical cable as claimed in claim 10 is characterized in that, every twisted wire in many twisted wires generally all is parallel to inner core and extends.
14. optical cable as claimed in claim 10 is characterized in that, every twisted wire in many twisted wires of described inner core twisting.
15., it is characterized in that many twisted wires comprise a subclass that is made of many twisted wires at least as claim 9 or 10 described optical cables, and make many mutual twistings of microbend twisted wire.
16. optical cable as claimed in claim 10 is characterized in that, many twisted wires comprise a subclass that is made of many twisted wires at least, and make many mutual twistings of microbend twisted wire and around described inner core twisting.
17. optical cable as claimed in claim 10 is characterized in that, described inner core is made by a kind of trnaslucent materials.
18. optical cable as claimed in claim 17 is characterized in that, described inner core comprises a translucent pipe.
19. optical cable as claimed in claim 18 is characterized in that, described inner core comprises a kind of fluid, and described fluid is arranged in described translucent pipe.
20. a method that is used to prepare optical cable is characterized in that, said method comprising the steps of:
By every twisted wire in many plastic optical fiber twisted wires of independent twisting, in every twisted wire, form a plurality of microbends;
With every twisted wire in many twisted wires be positioned at least with many twisted wires in another is adjacent; And
Around many microbend twisted wires, form sheath.
21. method as claimed in claim 20 is characterized in that, the pattern of described microbend is quite even.
22. method as claimed in claim 21 is characterized in that, described method comprises also following step: provide many plastic optical fiber twisted wires by spaced relationship.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US7957698A | 1998-05-15 | 1998-05-15 | |
| US09/079,576 | 1998-05-15 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1236112A CN1236112A (en) | 1999-11-24 |
| CN1110715C true CN1110715C (en) | 2003-06-04 |
Family
ID=22151424
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN99106741A Expired - Fee Related CN1110715C (en) | 1998-05-15 | 1999-05-14 | Lateral luminous optical cable and its preparing equiment and preparing method |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN1110715C (en) |
| TW (1) | TW444144B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4881795A (en) * | 1989-02-03 | 1989-11-21 | Siecor Corporation | High count optical fiber distribution cable |
| US5315813A (en) * | 1991-07-05 | 1994-05-31 | Sumitomo Electric Industries, Ltd. | Method and apparatus for manufacturing optical fiber cable |
| US5345531A (en) * | 1993-02-26 | 1994-09-06 | Fiberstars, Inc. | Optical fiber lighting apparatus and method |
| US5611017A (en) * | 1995-06-01 | 1997-03-11 | Minnesota Mining And Manufacturing Co. | Fiber optic ribbon cable with pre-installed locations for subsequent connectorization |
| US5617497A (en) * | 1993-05-21 | 1997-04-01 | Super Vision International, Inc. | Lateral illumination fiber optic cable device and method of manufacture |
-
1999
- 1999-05-14 CN CN99106741A patent/CN1110715C/en not_active Expired - Fee Related
-
2000
- 2000-03-20 TW TW88119458A patent/TW444144B/en not_active IP Right Cessation
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4881795A (en) * | 1989-02-03 | 1989-11-21 | Siecor Corporation | High count optical fiber distribution cable |
| US5315813A (en) * | 1991-07-05 | 1994-05-31 | Sumitomo Electric Industries, Ltd. | Method and apparatus for manufacturing optical fiber cable |
| US5345531A (en) * | 1993-02-26 | 1994-09-06 | Fiberstars, Inc. | Optical fiber lighting apparatus and method |
| US5617497A (en) * | 1993-05-21 | 1997-04-01 | Super Vision International, Inc. | Lateral illumination fiber optic cable device and method of manufacture |
| US5611017A (en) * | 1995-06-01 | 1997-03-11 | Minnesota Mining And Manufacturing Co. | Fiber optic ribbon cable with pre-installed locations for subsequent connectorization |
Also Published As
| Publication number | Publication date |
|---|---|
| TW444144B (en) | 2001-07-01 |
| CN1236112A (en) | 1999-11-24 |
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