CN203658625U

CN203658625U - Calibration system

Info

Publication number: CN203658625U
Application number: CN201420021777.1U
Authority: CN
Inventors: 童朝阳; 刘蕾; 林麟
Original assignee: Tyco Electronics Shanghai Co Ltd
Current assignee: Tyco Electronics Shanghai Co Ltd
Priority date: 2014-01-14
Filing date: 2014-01-14
Publication date: 2014-06-18
Anticipated expiration: 2024-01-14

Abstract

The utility model discloses a calibration system for calibrating the position of an object fiber in the through hole of an object insertion core. The calibration system comprises: an excircle calibration element which is used for making the center determined by the excircle of the object insertion core aligned with the center of the excircle calibration element; a fiber core calibration element, wherein the center of the fiber core is aligned with the center of the excircle calibration element; an optical vision system which is used for identifying the central position of the fiber core of the object fiber and the central position of the fiber core of the fiber core calibration element; and a movement system which is used for actively adjusting the position of the object fiber in the through hole of the object insertion core under the guide of the optical vision system to make the center of the fiber core of the object fiber aligned with the center of the fiber core of the fiber core calibration element so as to make the center of the fiber core of the object fiber aligned with the center determined by the excircle of the object insertion core to eliminate the insertion loss caused by radial deviation between the center of the fiber core of the fiber and the center of the excircle cylinder of the insertion core.

Description

Calibration system

Technical field

The utility model relates to calibration system and the calibration steps in the position of the through hole of lock pin for fiber optic calibration, and the fiber stub assembly and the joints of optical fibre that utilize this calibration system and calibration steps to produce.

Background technology

Be applied to the lock pin of the joints of optical fibre, claim again pin body.Lock pin is the core component of the joints of optical fibre, and it is a kind of high precision components forming by precision processing technology.In joints of optical fibre manufacturing process, conventionally adopt and will peel off also clean bare fibre through the high precision lock pin through hole that is full of glue, then to it glue that is heating and curing, optical fiber is fixed in high precision lock pin, then makes required optical fiber connector via a series of programs such as polishing, polishing, tests.Because all manufacture processes can produce inevitable error and introduce artificially error for dimensional fits/assembling needs, for example, lock pin through-hole diameter must be greater than optical fiber external diameter so that optical fiber can penetrate in through hole, need to there is inborn error in optical fiber external diameter and lock pin clear size of opening like this, for another example, optical fiber axle center and lock pin through hole are owing to there being space to exist decentraction and lock pin through hole and alignment fiducials (single core connector mainly to be referred to lock pin external diameter, multi-core connector is mainly referred to and aims at pin hole) there is processing and manufacturing error etc., these factors all can cause that the lateral excursion in optical fiber axle center (also has other factors certainly, as angle mismatching etc.), thereby the insertion loss while affecting joints of optical fibre docking.

Because the mode field diameter of single-mode fiber is more much smaller (for most of optical fiber communications than the mode field diameter of multimode optical fiber, roughly 1/5 to 1/6 relation), therefore, the alignment precision of single-mode fiber requires will be far away higher than the alignment precision requirement to multimode optical fiber, like this, the lock pin precision that the lock pin precision that single-mode optical fiber connector uses will be used higher than multimode optical fiber connector far away.In order to ensure to guarantee that in manufacture process single-mode optical fiber connector reaches the requirement of industry standard index of correlation, manufacture field at the joints of optical fibre at present, conventionally use respectively the lock pin of different accuracy requirement for list, multimode optical fiber, multimode optical fiber connector is distinguished with lock pin and single-mode optical fiber connector lock pin.Its outward appearance of single mode/multimode lock pin that the joints of optical fibre use, it is identical that structure seems, but single mode lock pin requires very high to the relative dimensions of lock pin, especially the concentricity accuracy requirement of the through hole of through-hole aperture and lock pin and exterior circular column is high (conventionally will be in 1.5 microns, ultralow insertion loss while connection in order to meet docking, precision even will be controlled at sub-micron rank-be less than 1 micron), the most direct result of high-precision requirement is, the high cost of single mode connector that causes of single mode lock pin cost/price is high, especially outstanding for ultra-low loss connector, lock pin cost is almost difference at double.

It is mainly very high in the dimensional requirement aspect the concentricity of lock pin diameter of bore and lock pin endoporus and exterior circular column that single mode lock pin requires the relative dimensions of lock pin, below the dimension precision requirement in the following aspects by contrast single mode lock pin and multimode lock pin:

1) lock pin exterior circular column diameter dimension tolerance

Single mode: lock pin exterior circular column diameter dimension tolerance reaches +/-0.0005mm, that is, and-0.0005mm～0.0005mm:

Multimode: lock pin exterior circular column diameter dimension typical tolerances requires to reach +/-0.001mm, that is, and-0.001mm～0.001mm.

2) lock pin diameter of bore:

Single mode: lock pin diameter of bore dimensional tolerence, at 0.000～0.001mm, even requires 0.0000～0.0005mm for hole dimension in low-loss single mode lock pin;

Multimode: lock pin diameter of bore size typical tolerances is at 0.000-0.004mm.

3) concentricity requirement of optical fiber and exterior circular column:

Single mode: concentricity General Requirements reaches 0.001mm, for low-loss single mode lock pin, concentricity requirement even reaches 0.0005mm;

Multimode: concentricity General Requirements reaches 0.004mm.

Manufacture the deficiency in field for making up the joints of optical fibre, applicant of the present utility model has proposed the lock pin (it have compared with large through-hole aperture and compared with large eccentricity) of a kind of use based on low precision and has manufactured the novel technique of the single-mode optical fiber connector of low cost, high-performance (low insertion loss), easy operating in patented claim before.

This new technology is a kind of technology that realizes lock pin through hole that single-mode fiber is placed in low precision and produce high precision ferrule assembly, it is characterized by the fiber guides that protrudes from insertion core end face is entered to independently high precision alignment instrument, make the high precision pilot hole of single-mode fiber clad to be made and high precision alignment instrument carry out close adjustment, and it is fixed in low precision lock pin to be made, thereby, produce high-precision fiber stub assembly and the joints of optical fibre with the lock pin of low precision.

But because this technology is the mechanism of aiming at based on optical fibre packages coating, it need to have the comparatively good precondition that is distributed as with the concentricity between optical fibre packages coating and fibre core, further, in the actual manufacture process of optical fiber, between clad and fibre core, can inevitably there is the error (eccentric) of decentraction, and in the process of aiming at by tool master, there is stochastic error in the diameter of optical fibre packages coating, the processing procedure control of batch error and different manufacturers all can cause some random differences to a certain extent, in addition, the possibility that cover surface exists the foreign matters such as a little molecule/dust to adhere to, like this after clad high precision alignment, can not guarantee that fibre core obtains consistent full accuracy and aims at.For this deficiency, spy proposes the utility model just.

Utility model content

The purpose of this utility model is intended to solve at least one aspect of the above-mentioned problems in the prior art and defect.

An object of the present utility model be to provide a kind of for fiber optic calibration calibration system and the calibration steps in the position of the through hole of lock pin, it can make the center of fibre core of optical fiber and the center of the exterior circular column of lock pin aim at, thereby has eliminated the insertion loss that the radial missing between the center of fibre core of optical fiber and the center of the exterior circular column of lock pin causes.

According to an aspect of the present utility model, a kind of calibration system is provided, position for calibration target optical fiber at the through hole of target lock pin, wherein, described calibration system comprises: cylindrical calibrating element, for the determined center of cylindrical of calibration target lock pin, the determined center of cylindrical of target lock pin is aimed at the center of cylindrical calibrating element; Fibre core calibrating element, the center of the fibre core of described fibre core calibrating element is aimed at the center of cylindrical calibrating element; Optical vision system, for identifying the center of fibre core of target optical fiber and the center of the fibre core of fibre core calibrating element; And mobile system, for under the guiding of optical vision system active adjustment target optical fiber in the position of the through hole of target lock pin, the center of the fibre core of target optical fiber is aimed at the center of the fibre core of fibre core calibrating element, thereby the center of fibre core of target optical fiber and the determined center of cylindrical of target lock pin are aimed at.

According to the embodiment of an exemplary of the present utility model, described calibration system also comprises: calibration lock pin, described fibre core calibrating element is fixed in the through hole of calibration lock pin.

According to the embodiment of another exemplary of the present utility model, described cylindrical calibrating element is alignment sleeve instrument, and described calibration lock pin and described target lock pin insert from the two ends of alignment sleeve instrument respectively.

According to the embodiment of another exemplary of the present utility model, described optical vision system at least comprises: the first imaging device, for the first direction photographic subjects optical fiber along vertical with the central axis of cylindrical calibrating element and the first image of fibre core calibrating element; The second imaging device, for the second direction photographic subjects optical fiber along vertical with the central axis of cylindrical calibrating element and the second image of fibre core calibrating element, described second direction is perpendicular to first direction; And image recognition apparatus, for identifying the center of fibre core of target optical fiber and the center of the fibre core of fibre core calibrating element of the first image, and for identifying the center of fibre core of target optical fiber and the center of the fibre core of fibre core calibrating element of the second image.

According to the embodiment of another exemplary of the present utility model, described the first imaging device comprises: the first light source, is arranged on the side along first direction of cylindrical calibrating element; With the first video camera, be relatively arranged on the opposite side along first direction of cylindrical calibrating element with the first light source.

According to the embodiment of another exemplary of the present utility model, described the second imaging device comprises: secondary light source, is arranged on the side along second direction of cylindrical calibrating element; With the second video camera, be relatively arranged on the opposite side along second direction of cylindrical calibrating element with secondary light source.

According to the embodiment of another exemplary of the present utility model, described image recognition apparatus comprises the image processing system that the first image and the second image are processed.

According to the embodiment of another exemplary of the present utility model, protrude from the end face of target lock pin the end of described target optical fiber, and protrude and relative with the end part interval of described target optical fiber from the end face of calibration lock pin the end of described fibre core calibrating element.

According to the embodiment of another exemplary of the present utility model, the image of the end that described the first imaging device is relative with the interval of fibre core calibrating element with the second imaging device photographic subjects optical fiber.

According to the embodiment of another exemplary of the present utility model, on the periphery wall of described cylindrical calibrating element, be formed with printing opacity mouth, to can see through described cylindrical calibrating element and be received by the first and second imaging devices respectively from the light of the first and second light sources.

According to the embodiment of another exemplary of the present utility model, described cylindrical calibrating element is made up of transparent material, to can see through described cylindrical calibrating element and be received by the first and second imaging devices respectively from the light of the first and second light sources.

According to the embodiment of another exemplary of the present utility model, described mobile system comprises: mechanical arm, has the fibre clip for clamping target optical fiber; And closed-loop feedback control system, the position of fibre clip is regulated until described error is zero or in predetermined scope for the error between the center of fibre core of target optical fiber and the center of the fibre core of fibre core calibrating element that detect according to optical vision system.

According to the embodiment of another exemplary of the present utility model, described preset range is-0.001mm to 0.001mm.

According to the embodiment of another exemplary of the present utility model, described preset range is-0.3 μ m to 0.3 μ m.

According to another aspect of the present utility model, provide a kind of for calibration target optical fiber the calibration steps in the position of the through hole of target lock pin, comprise the steps:

Cylindrical calibrating element and fibre core calibrating element are provided, and the center of the fibre core of described fibre core calibrating element is aimed at the center of cylindrical calibrating element;

With the determined center of cylindrical of cylindrical calibrating element calibration target lock pin, the determined center of cylindrical of target lock pin is aimed at the center of cylindrical calibrating element; With

The position of active adjustment target optical fiber in the through hole of target lock pin under the guiding of optical vision system, makes the center of the fibre core of target optical fiber aim at the center of the fibre core of fibre core calibrating element.

According to the embodiment of an exemplary of the present utility model, described fibre core calibrating element is fixed in the through hole of calibration lock pin.

According to the embodiment of another exemplary of the present utility model, described error comprise according to the first image detection to the center of fibre core of target optical fiber and the center of the fibre core of fibre core calibrating element between the first error and the second error between the center of fibre core of target optical fiber of arriving according to the second image detection and the center of the fibre core of fibre core calibrating element.

According to another aspect of the present utility model, a kind of method of manufacturing fiber stub assembly is provided, described fiber stub assembly comprises lock pin and is arranged in the optical fiber of through hole of lock pin, described method comprises the steps:

Utilize such alignment system or calibration steps to calibrate the position in the through hole of lock pin optical fiber, the center of fibre core of optical fiber and the determined center of the cylindrical of lock pin are aimed at; With

Utilize glue or equivalent curable body that optical fiber is fixed in the through hole of lock pin.

According to another aspect of the present utility model, a kind of fiber stub assembly is provided, comprise lock pin and be arranged in the optical fiber of through hole of lock pin, wherein, described fiber stub assembly utilizes preceding method to make.

According to another aspect of the present utility model, a kind of joints of optical fibre are provided, comprising: housing; With the fiber stub assembly inserting in housing, wherein, described fiber stub assembly is aforementioned fiber stub assembly.

According to another aspect of the present utility model, a kind of calibration system is provided, position for calibration target optical fiber at the through hole of target lock pin, wherein, described calibration system comprises: fibre core calibrating element, for example being centrally located in, according to the positioning datum of target lock pin (, the alignment guidance hole of the exterior circular column of single core lock pin or multicore lock pin) determined theoretical center place of the fibre core of described fibre core calibrating element; Optical vision system, for identifying the center of fibre core of target optical fiber and the center of the fibre core of fibre core calibrating element; And mobile system, in the position of the through hole of target lock pin, the center of the fibre core of target optical fiber is aimed at for active adjustment target optical fiber under the guiding of optical vision system with the center of the fibre core of fibre core calibrating element.

Provide fibre core calibrating element, being centrally located according to the determined theoretical center of the positioning datum of target lock pin place of the fibre core of described fibre core calibrating element; With

The utility model belongs to joints of optical fibre field, the utility model is different from the employing high precision lock pin of prior art or adopts low precision lock pin to be equipped with truing tool independently the technology of optical fibre packages coating being carried out to high precision alignment, but a kind of mobile device that uses carries out active alignment based on optical vision system to fibre core, realization utilizes the lock pin to be made of low precision or target lock pin (compared with the lock pin of standard, the lock pin to be made of this low precision has compared with large through-hole aperture and compared with large eccentricity) manufacture low cost, very-high performance (ultralow insertion loss), the fiber stub assembly of easy operating and innovating technologies of the joints of optical fibre, this technical scheme realizes the joints of optical fibre of the ultra-low loss of future generation that is close to 0dB loss (lossless).

Propose before applicant of the present utility model to pass through the technology that high precision alignment instrument carries out optical fiber align be the mechanism of aiming at based on optical fibre packages coating, utilized the concentricity between optical fibre packages coating and fibre core to there is this condition of comparatively good distribution, but, due in the actual manufacture process of optical fiber, between clad and fibre core, can inevitably there is the error of decentraction, and in the process of aiming at by tool master, there is random deviation in the diameter of optical fibre packages coating, batch deviation, the control deviation of manufacturer all can cause some random differences to a certain extent, in addition, the foreign matters such as a little molecule/dust that cover surface may be adhered to, like this after clad high precision alignment, realize lower junction loss, but because fibre core is difficult to obtain consistent, the aligning of full accuracy, be difficult to realize consistent ultra-low loss (lossless) connector.

The utility model is distinguished and is compared with passing through of proposing the before technical scheme that high precision alignment instrument carries out optical fibre packages coating aligning, what the utility model adopted is utilize image recognition fibre core profile by the fiber core active alignment in connector processed the fiber core in the fibre core in be fixed on high precision single mode ferrule assembly with high precision in calibration unit (its contained fibre core calibration is first has certain protruding fine length, the physical centre of its fibre core is accurately controlled in Nano grade with respect to the bias of the physical centre position of lock pin exterior circular column, close to 0), like this, aim at the fibre core of optical fiber instead of the clad of optical fiber by contactless image recognition, thereby evade the random difference of bias between fibre core and the clad of optical fiber processed completely, the random difference of clad diameter, the whether intact and clad outside surface clean conditions of fiber end face state etc. is easy to the factor impact of impact based on optical fibre packages coating alignment precision, reach Nano grade alignment precision, by being fixed in the low precision lock pin of system at optical fiber processed of having aimed at, from instrument, take out at ferrule assembly processed (at optical fiber processed based on fibre core high-precision calibration and be fixed in lock pin processed), through the necessary one-tenth end processing to end face, assembling, test, like this, by initiatively the low cost that high precision alignment is made being carried out in fibre core position, the superhigh precision joints of optical fibre of ultra-low loss complete.

Especially, for making single fiber-optic connector, active alignment system contains high precision excircle aims at unit, including fibre core calibrates first high precision ferrule assembly (its contained fibre core calibration unit has certain protruding fine length, and be fixed in high precision single mode lock pin with high precision, be the physical centre of its fibre core with respect to the bias of the physical centre position of lock pin exterior circular column at Nano grade, close to 0) and three part compositions of fibre core profile vision alignment system, the right cylinder that is respectively used to be aligned in the low precision lock pin of system with in have fibre core to calibrate the right cylinder of first calibration high precision single mode lock pin, alignment fiducials at fiber core processed is provided, detection and the fiber core of active alignment in ferrule assembly processed and the fibre core in high precision single mode ferrule assembly are calibrated the positional precision between first fibre core, the deviation adjusting of the physical axis that makes two fibre cores in the two dimensional surface perpendicular to axle center, be registered in Nano grade.

Compared with the scheme of carrying out optical fibre packages coating aligning with use high precision alignment instrument, this technical scheme is the mode that adopts fibre core active alignment, thereby realize the ultimate controllability in fiber core positional precision processed, predictability, the high precision reproducibility of individuality to individuality, batch difference and random difference because of bare fibre diameter (clad diameter) are reduced to greatest extent, the impact of the factor such as bias and stochastic pattern between clad and fibre core, performance and the random interaction (ultralow insertion loss and ultralow random interworking insertion loss) of connector are improved so to greatest extent.

The utility model employing is carried out active calibration technology to fiber core and has been realized the high-quality single-mode optical fiber connector part based on low precision lock pin production low cost, ultra-low loss.

It should be noted that; although this technology is taking the single-mode optical fiber connector of realizing ultra-low loss based on low precision lock pin as target; meanwhile, this technology is also applicable to being adjusted to the multimode optical fiber connector of making superhigh precision ultra-low loss, also within the scope of this utility model protection.

Although this technology illustrates utility model thought taking single fiber-optic connector as example, meanwhile, this technology be equally applicable to multi-fiber connector, therefore, with this fabrication techniques multi-core connector also within the scope of this utility model protection.

By the description of hereinafter with reference to accompanying drawing, the utility model being done, other object of the present utility model and advantage will be apparent, and can help that the utility model is had to comprehensive understanding.

Brief description of the drawings

Fig. 1 shows according to the schematic diagram of the high precision excircle calibrating element of the calibration system of the embodiment of an exemplary of the present utility model and high precision fibre core calibrating element;

Fig. 2 A and Fig. 2 B show respectively the high precision fibre core calibrating element shown in Fig. 1 and fix transverse sectional view and the longitudinal sectional view of the amplification of the high-precision calibration lock pin of this high precision fibre core calibrating element;

Fig. 3 shows the cut-open view along vertical fore-and-aft plane after the target lock pin with target optical fiber (lock pin to be made) is inserted in the high precision excircle calibrating element shown in Fig. 1;

Fig. 4 shows according to the schematic diagram of the optical vision system of the calibration system of the embodiment of an exemplary of the present utility model;

Fig. 5 A demonstration utilizes the optical vision system shown in Fig. 4 along first direction (the vertical direction Y shown in Fig. 4), target optical fiber and high precision fibre core calibrating element to be carried out the schematic diagram of optical imagery;

Fig. 5 B demonstration utilizes the optical vision system shown in Fig. 4 along second direction (the horizontal direction X shown in Fig. 4), target optical fiber and high precision fibre core calibrating element to be carried out the schematic diagram of optical imagery;

Fig. 6 shows and utilizes target optical fiber that the optical vision system shown in Fig. 4 photographs along first direction (the vertical direction Y shown in Fig. 4) and the first image of high precision fibre core calibrating element;

Fig. 7 is presented under the guiding of optical vision system, the center of the fibre core of target optical fiber to be initiatively moved into the center of the fibre core of high precision fibre core calibrating element and aims at image afterwards; With

Fig. 8 show according to the embodiment of an exemplary of the present utility model for controlling the schematic diagram of closed loop position feedback control system of mobile device.

Embodiment

Below by embodiment, and by reference to the accompanying drawings, the technical solution of the utility model is described in further detail.In instructions, same or analogous drawing reference numeral is indicated same or analogous parts.Followingly with reference to accompanying drawing, the explanation of the utility model embodiment is intended to overall utility model design of the present utility model to make an explanation, and does not should be understood to a kind of restriction of the present utility model.

In the embodiment of an embodiment shown in Fig. 1 to Fig. 8, a kind of calibration system is provided, position for calibration target optical fiber 30 at the through hole 21 of target lock pin 20, wherein, described calibration system comprises: high precision excircle calibrating element 100, for the determined center of cylindrical of calibration target lock pin 20, the determined center of cylindrical of target lock pin 20 is aimed at high precision excircle calibrating element 100 center; High precision fibre core calibrating element 300, the fibre core 302 center of described high precision fibre core calibrating element 300 is aimed at high precision excircle calibrating element 100 center; Optical vision system, for identifying the center of fibre core 32 of target optical fiber 30 and the center of the fibre core 302 of high precision fibre core calibrating element 300; And mobile system, for under the guiding of optical vision system active adjustment target optical fiber 30 in the position of the through hole 21 of target lock pin 20, the fibre core 32 center of target optical fiber 30 and the fibre core 302 center of high precision fibre core calibrating element 300 are aimed at, thereby the fibre core 32 center of target optical fiber 30 and the determined center of cylindrical of target lock pin 20 are aimed at.

It should be noted that, the term " high precision " in the application refers to " precision is greater than or equal to the precision of the industry standard defined of the joints of optical fibre ".But, because the precision of the industry standard defined of the joints of optical fibre is constantly to change with the variation in epoch, therefore, the term " high precision " in the application is not limited to certain fixed numbers or certain fixed numbers scope, and it can change according to the variation in epoch.

Fig. 1 shows according to the schematic diagram of the high precision excircle calibrating element 100 of the calibration system of the embodiment of an exemplary of the present utility model and high precision fibre core calibrating element 300.Fig. 3 shows the cut-open view along vertical fore-and-aft plane after will inserting in the high precision excircle calibrating element 100 shown in Fig. 1 with the target lock pin of target optical fiber (for the manufacture of the optical fiber of fiber stub assembly or the joints of optical fibre) (for the manufacture of the lock pin of fiber stub assembly or the joints of optical fibre).

As shown in figures 1 and 3, target lock pin 20 is single core lock pin, and target optical fiber 30 inserts in the through hole of target lock pin 20.In the embodiment of an exemplary of the present utility model, the diameter of the through hole of target lock pin 20 is much larger than the diameter of target optical fiber 30, be convenient to like this in through hole that target optical fiber 30 is inserted into target lock pin 20, also can reduce the manufacturing cost of target lock pin 20, because do not need to provide and the high-precision through hole of target optical fiber 30 precision-fit.But, because the size of the through hole of target lock pin 20 is larger, therefore, be difficult to ensure the positional precision of target optical fiber 30 in the through hole of target lock pin 20, be difficult to the center of the fibre core 32 (referring to Fig. 6) that ensures target optical fiber 30 and the determined center of exterior circular column of target lock pin 20 is aimed at.

Fig. 2 A and Fig. 2 B show respectively the high precision fibre core calibrating element 300 shown in Fig. 1 and fix transverse sectional view and the longitudinal sectional view of the amplification of the high-precision calibration lock pin 200 of this high precision fibre core calibrating element 300.

As shown in Figure 1 to Figure 3, in illustrated embodiment, high precision fibre core calibrating element 300 is fixed in the through hole of a high-precision calibration lock pin 200.As shown in Figure 2 B, high precision fibre core calibrating element 300 has fibre core 302 and the clad 301 that is coated on fibre core 302 outsides.In illustrated embodiment, the fibre core 302 center of high precision fibre core calibrating element 300 is aimed at the determined center of exterior circular column of high-precision calibration lock pin 200.

Please continue referring to Fig. 1 to Fig. 3, in the embodiment of illustrated exemplary, high precision excircle calibrating element 100 is high precision alignment sleeve barrel tool, and high-precision calibration lock pin 200 and target lock pin 20 insert from the two ends of high precision alignment sleeve barrel tool respectively, like this, just make the determined center of cylindrical of target lock pin 20 and the determined center of cylindrical of high-precision calibration lock pin 200 aim at high precision excircle calibrating element 100 center, thereby the determined center of the cylindrical that makes target lock pin 20 is aimed at the determined center of cylindrical of high-precision calibration lock pin 200.For example, make error between the determined center of cylindrical of target lock pin 20 and the determined center of cylindrical of high-precision calibration lock pin 200 in the scope of-0.001mm to 0.001mm, preferably, in the scope of-0.3 μ m to 0.3 μ m.

As shown in figures 1 and 3, after high-precision calibration lock pin 200 inserts high precision excircle calibrating element 100, the fibre core 302 center of high precision fibre core calibrating element 300 is aimed at high precision excircle calibrating element 100 center.

As previously mentioned, because the through-hole diameter of target lock pin 20 is much larger than the diameter of target optical fiber 30, therefore, after target optical fiber 30 inserts in the through hole of target lock pin 20, be difficult to ensure that the fibre core 32 center of target optical fiber 30 and the determined center of exterior circular column of target lock pin 20 aim at, be difficult to ensure that the fibre core 32 center of target optical fiber 30 and the fibre core 302 center of high precision fibre core calibrating element 300 aim at, for example, shown in Fig. 5 A along in the longitudinal sectional view of the direction vertical with the central axis of high precision excircle calibrating element 100 (the horizontal direction X in Fig. 4), between the fibre core 302 center of the fibre core 32 center of target optical fiber 30 and high precision fibre core calibrating element 300, just there is a first deviation e1, shown in Fig. 5 B along in the longitudinal sectional view of the direction vertical with the central axis of high precision excircle calibrating element 100 (the vertical direction Y in Fig. 4), between the fibre core 32 center of target optical fiber 30 and the fibre core 302 center of high precision fibre core calibrating element 300, also may there is a second deviation e2.

Therefore, for accurate aligning the between the fibre core 32 center of realize target optical fiber 30 and the fibre core 302 center of high precision fibre core calibrating element 300, in the utility model, under the guiding of optical vision system, utilize the position of mobile system active adjustment target optical fiber 30 in the through hole 21 of target lock pin 20, until the first deviation e1 and the second deviation e2 are zero or in predetermined scope, for example, preset range can be-0.001mm to 0.001mm, preferably, preset range can be-0.3 μ m to 0.3 μ m.Like this, just make the fibre core 32 center of target optical fiber 30 and the fibre core 302 center of high precision fibre core calibrating element 300 aim at, thereby the fibre core 32 center of target optical fiber 30 and the determined center of cylindrical of target lock pin 20 are aimed at.

Fig. 5 A and Fig. 5 B have shown respectively between the center of fibre core 32 of target optical fiber 30 and the center of the fibre core 302 of high precision fibre core calibrating element 300 two error e 1 and the e2 in two orthogonal two dimensional surfaces.Therefore, between the center of the fibre core 302 of the center of the fibre core 32 of target optical fiber 30 and high precision fibre core calibrating element 300, the error e in solid space can obtain according to aforementioned two error e 1 and e2.Particularly, can obtain error e according to formula (1) below:

e = \sqrt{e_{1}^{2} + e_{2}^{2}} - - - (1)

Therefore, for accurate aligning the between the fibre core 32 center of realize target optical fiber 30 and the fibre core 302 center of high precision fibre core calibrating element 300, in the embodiment of another exemplary of the present utility model, under the guiding of optical vision system, utilize the position of mobile system active adjustment target optical fiber 30 in the through hole 21 of target lock pin 20, until error e is zero or in predetermined scope, for example, preset range can be-0.001mm to 0.001mm, preferably, preset range can be-0.3 μ m to 0.3 μ m.

A specific embodiment of the position of active adjustment target optical fiber 30 in the through hole 21 of target lock pin 20 will be described by Fig. 4 to Fig. 8 in detail below.

Fig. 4 shows according to the schematic diagram of the optical vision system of the calibration system of the embodiment of an exemplary of the present utility model.

As shown in Figure 4, optical vision system at least comprises: the first imaging device 411,412, for the first direction Y photographic subjects optical fiber 30 along vertical with the central axis of high precision excircle calibrating element 100 and the first image of high precision fibre core calibrating element 300; The second imaging device 421,422, for the second direction X photographic subjects optical fiber 30 along vertical with the central axis of high precision excircle calibrating element 100 and the second image of high precision fibre core calibrating element 300, second direction X is perpendicular to first direction Y; And image recognition apparatus is (not shown, can be computing machine), for identifying the center of fibre core 32 of target optical fiber 30 and the center of the fibre core 302 of high precision fibre core calibrating element 300 of the first image, and for identifying the center of fibre core 32 of target optical fiber 30 and the center of the fibre core 302 of high precision fibre core calibrating element 300 of the second image.

Particularly, as shown in Figure 4, in the embodiment of an exemplary of the present utility model, the first imaging device 411,412 comprises: the first light source 411, is arranged on the side along first direction Y of high precision excircle calibrating element 100; With the first video camera 412, be relatively arranged on the opposite side along first direction Y of high precision excircle calibrating element 100 with the first light source 411.The second imaging device 421,422 comprises: secondary light source 421, is arranged on the side along second direction X of high precision excircle calibrating element 100; With the second video camera 422, be relatively arranged on the opposite side along second direction X of high precision excircle calibrating element 100 with secondary light source 421.

Note that at the utility model and be not limited to illustrated embodiment, optical vision system can also comprise and similar the 3rd imaging device of the first and second imaging devices, the 4th imaging device or more imaging device.

Fig. 5 A demonstration utilizes the optical vision system shown in Fig. 4 along first direction (the vertical direction Y shown in Fig. 4), target optical fiber 30 and high precision fibre core calibrating element 300 to be carried out the schematic diagram of optical imagery.Fig. 6 shows and utilizes target optical fiber 30 that the optical vision system shown in Fig. 4 photographs along first direction (the vertical direction Y shown in Fig. 4) and the first image of high precision fibre core calibrating element 300.

As shown in Figure 5A, protrude from the end face of target lock pin 20 end of target optical fiber 30, and protrude and relative with the end part interval of target optical fiber 30 from the end face of high-precision calibration lock pin 200 end of high precision fibre core calibrating element 300.The first imaging device 411,412 is along the image of first direction photographic subjects optical fiber 30 end relative with the interval of high precision fibre core calibrating element 300, thereby obtains first image as shown in Figure 6.

According to the first image shown in Fig. 6, can clearly be seen that, in the first image, fibre core (shinny part) the 32 center (as shown in the dotted line in Fig. 6) of target optical fiber 30 and fibre core (shinny part) 302 center (as shown in the dotted line in Fig. 6) misalignment of high precision fibre core calibrating element 300, between there is a deviation e1.It should be noted that, because the material of fibre core is different from clad, therefore, can directly clearly distinguish fibre core and clad according to the image of taking.If needed, also can process the first image with image processing system, make the border of fibre core more outstanding and be easier to identify.

Like this, mobile system can be under the guiding of optical vision system the position of active adjustment target optical fiber 30 in the through hole 21 of target lock pin 20, until according to the first image and the second image detection to the fibre core 32 of target optical fiber 30 and the fibre core 302 of high precision fibre core calibrating element 300 between deviation be zero or in predetermined scope.

For example, Fig. 7 is presented under the guiding of optical vision system the fibre core 32 center (as shown in the dotted line in Fig. 7) of target optical fiber 30 is initiatively moved into and aims at image afterwards with the fibre core 302 center (as shown in the dotted line in Fig. 7) of high precision fibre core calibrating element 300.

In order to move the high-precision position of realize target optical fiber 30, in an embodiment of the present utility model, mobile system comprises: and mechanical arm (not shown, for example, multi-freedom robot), there is the fibre clip for clamping target optical fiber 30; And closed-loop feedback control system, the position of fibre clip is regulated until error is zero or in predetermined scope for the error between the center of fibre core 32 of target optical fiber 30 and the center of the fibre core 302 of high precision fibre core calibrating element 300 that detect according to optical vision system.

Fig. 8 show according to the embodiment of an exemplary of the present utility model for controlling the schematic diagram of closed loop position feedback control system of fibre clip of mechanical arm.

As shown in Figure 8, whole closed loop position feedback control system can comprise input media, be arranged on the fibre clip on mechanical arm movably, drive unit, control device and the pick-up unit being made up of optical vision system etc. that driving device hand moves.Because position closed loop feedback control system belongs to classical control method, no longer it is described in more details here.

According to another aspect of the present utility model, also provide a kind of for calibration target optical fiber the calibration steps in the position of the through hole of target lock pin, comprise the steps:

High precision excircle calibrating element 100 and high precision fibre core calibrating element 300 are provided, and the fibre core 302 center of described high precision fibre core calibrating element 300 is aimed at high precision excircle calibrating element 100 center;

With the determined center of cylindrical of high precision excircle calibrating element 100 calibration target lock pins 20, the determined center of cylindrical of target lock pin 20 is aimed at high precision excircle calibrating element 100 center; With

The position of active adjustment target optical fiber 30 in the through hole 21 of target lock pin 20 under the guiding of optical vision system, aims at the fibre core 32 center of target optical fiber 30 and the fibre core 302 center of high precision fibre core calibrating element 300.

According to another aspect of the present utility model, a kind of method of manufacturing fiber stub assembly is also provided, described fiber stub assembly comprises lock pin 20 and is arranged in the optical fiber 30 of the through hole of lock pin 20, described method comprises the steps:

Utilize such alignment system or calibration steps to calibrate the position in the through hole of lock pin 20 optical fiber 30, the fibre core 32 center of optical fiber 30 and the determined center of cylindrical of lock pin 20 are aimed at; With

Utilize glue or equivalent curable body that optical fiber 30 is fixed in the through hole of lock pin 20.

According to another aspect of the present utility model, a kind of fiber stub assembly is also provided, comprise lock pin 20 and be arranged in the optical fiber 30 of the through hole of lock pin 20, wherein, described fiber stub assembly utilizes preceding method to make.

According to another aspect of the present utility model, a kind of joints of optical fibre are also provided, comprising:

Housing; With

Insert the fiber stub assembly in housing,

Wherein, described fiber stub assembly is the fiber stub assembly in previous embodiment.

According to another aspect of the present utility model, a kind of calibration system is also provided, the position for calibration target optical fiber 30 at the through hole 21 of target lock pin 20, wherein, described calibration system comprises:

High precision fibre core calibrating element 300, being centrally located according to the determined theoretical center of the positioning datum of target lock pin 20 place of the fibre core 302 of described high precision fibre core calibrating element 300;

Optical vision system, for identifying the center of fibre core 32 of target optical fiber 30 and the center of the fibre core 302 of high precision fibre core calibrating element 300; With

Mobile system, in the position of the through hole 21 of target lock pin 20, aims at the fibre core 32 center of target optical fiber 30 and the fibre core 302 center of high precision fibre core calibrating element 300 for active adjustment target optical fiber 30 under the guiding of optical vision system.

Provide high precision fibre core calibrating element 300, being centrally located according to the determined theoretical center of the positioning datum of target lock pin 20 place of the fibre core 302 of described high precision fibre core calibrating element 300; With

The utility model compared with prior art, has been abandoned and has been manufactured single mode and multimode optical fiber connector by the lock pin of distinguishing different accuracy specification in prior art.

Especially, in the time that needs are made low-loss or ultra-low-loss fiber connector, the method that existing technical staff uses is that the accuracy specification by improving lock pin (dwindles the through-hole aperture of lock pin, make the through-hole diameter of lock pin and the diameter of optical fiber mate as far as possible, and improve the fibre core of optical fiber and the concentricity of exterior circular column) realize the target of ultra-low loss, the distinct disadvantage of doing is like this that one, means a kind of expensive; They are two years old, because ultraprecise lock pin through hole becomes less, and the variation that the actual outside diameter of optical fiber also exists batch, it for wearing fibre (through whole lock pin through hole), is a challenge greatly, cause disconnected fine probability to increase, particularly dark damage can cause the reliability of light connector to reduce; Its three, for manufacturing in batches, always there is some individual eccentric discreteness, as long as occur, the random interworking insertion loss of light interface unit is destroyed, etc.

Simultaneously, compared with the technical scheme of carrying out optical fibre packages coating aligning with use high precision alignment instrument, this technical scheme adopts the mode to fiber core active alignment, and the high precision alignment of fibre core is remained in lock pin by fixing mode, be no longer dependent on the clad diameter of calibrating first optical fiber at optical fiber processed and/or fibre core, the bias of fibre core and clad, state (the angle of fiber end face, angle orientation, even integrity degree etc. weares and teares) and the impact of other factors on fibre core alignment precision such as clad outside surface clean conditions, thereby there is better the controllability in the positional precision of fiber core processed, predictability, consistance (the precision reproducibility of individuality to individuality), performance and the random interaction (ultralow insertion loss and ultralow random interworking insertion loss) of connector are improved so to greatest extent, meet the demand of optical interconnection of future generation to ultra-low loss or the lossless joints of optical fibre.

It will be appreciated by those skilled in the art that, embodiment described above is exemplary, and those skilled in the art can make improvements, the structure described in various embodiment can be carried out independent assortment in the case of the conflict aspect not recurring structure or principle.

Although by reference to the accompanying drawings the utility model is illustrated, in accompanying drawing, disclosed embodiment is intended to the utility model preferred implementation to carry out exemplary illustration, and can not be interpreted as a kind of restriction of the present utility model.

Although some embodiment of this overall utility model design are shown and explanation, those skilled in the art will appreciate that, in the case of not deviating from the principle and spirit of this overall utility model design, can make a change these embodiment, scope of the present utility model limits with claim and their equivalent.

It should be noted that word " comprises " does not get rid of other element or step, and word " " or " one " do not get rid of multiple.In addition, any element numbers of claim should not be construed as restriction scope of the present utility model.

Claims

1. a calibration system, the position for calibration target optical fiber (30) at the through hole (21) of target lock pin (20), is characterized in that, described calibration system comprises:

Cylindrical calibrating element (100), for the determined center of cylindrical of calibration target lock pin (20), the determined center of cylindrical of target lock pin (20) is aimed at the center of cylindrical calibrating element (100);

Fibre core calibrating element (300), the center of the fibre core (302) of described fibre core calibrating element (300) is aimed at the center of cylindrical calibrating element (100);

Optical vision system, for identifying the center of fibre core (32) of target optical fiber (30) and the center of the fibre core (302) of fibre core calibrating element (300); With

Mobile system, for under the guiding of optical vision system active adjustment target optical fiber (30) in the position of the through hole (21) of target lock pin (20), the center of fibre core (32) of target optical fiber (30) and the center of the fibre core (302) of fibre core calibrating element (300) are aimed at, thereby the center of fibre core (32) of target optical fiber (30) and the determined center of cylindrical of target lock pin (20) are aimed at.

2. calibration system according to claim 1, is characterized in that, also comprises:

Calibration lock pin (200), described fibre core calibrating element (300) is fixed in the through hole of calibration lock pin (200).

3. calibration system according to claim 2, is characterized in that,

Described cylindrical calibrating element (100) is alignment sleeve instrument, and

Described calibration lock pin (200) and described target lock pin (20) insert from the two ends of alignment sleeve instrument respectively.

4. calibration system according to claim 3, is characterized in that, described optical vision system at least comprises:

The first imaging device (411,412), for first direction (Y) the photographic subjects optical fiber (30) along vertical with the central axis of cylindrical calibrating element (100) and the first image of fibre core calibrating element (300);

The second imaging device (421,422), for second direction (X) the photographic subjects optical fiber (30) along vertical with the central axis of cylindrical calibrating element (100) and the second image of fibre core calibrating element (300), described second direction (X) is perpendicular to first direction (Y); With

Image recognition apparatus, for identifying the center of fibre core (32) of target optical fiber (30) and the center of the fibre core (302) of fibre core calibrating element (300) of the first image, and for identifying the center of fibre core (32) of target optical fiber (30) and the center of the fibre core (302) of fibre core calibrating element (300) of the second image.

5. calibration system according to claim 4, is characterized in that, described the first imaging device (411,412) comprising:

The first light source (411), is arranged on the side along first direction (Y) of cylindrical calibrating element (100); With

The first video camera (412), is relatively arranged on the opposite side along first direction (Y) of cylindrical calibrating element (100) with the first light source (411).

6. calibration system according to claim 5, is characterized in that, described the second imaging device (421,422) comprising:

Secondary light source (421), is arranged on the side along second direction (X) of cylindrical calibrating element (100); With

The second video camera (422), is relatively arranged on the opposite side along second direction (X) of cylindrical calibrating element (100) with secondary light source (421).

7. calibration system according to claim 4, is characterized in that,

Described image recognition apparatus comprises the image processing system that the first image and the second image are processed.

8. calibration system according to claim 6, is characterized in that,

Protrude from the end face of target lock pin (20) end of described target optical fiber (30), and protrude and relative with the end part interval of described target optical fiber (30) from the end face of calibration lock pin (200) end of described fibre core calibrating element (300).

9. calibration system according to claim 8, is characterized in that,

The image of the end that described the first imaging device (412) is relative with the interval of fibre core calibrating element (300) with the second imaging device (422) photographic subjects optical fiber (30).

10. calibration system according to claim 9, is characterized in that,

On the periphery wall of described cylindrical calibrating element (100), be formed with printing opacity (101), to can see through described cylindrical calibrating element (100) and be received by the first and second imaging devices (412,422) respectively from the light of the first and second light sources (411,421).

11. calibration systems according to claim 9, is characterized in that,

Described cylindrical calibrating element (100) is made up of transparent material, to can see through described cylindrical calibrating element (100) and be received by the first and second imaging devices (412,422) respectively from the light of the first and second light sources (411,421).

12. calibration systems according to claim 10, is characterized in that, described mobile system comprises:

Mechanical arm, has the fibre clip for clamping target optical fiber (30); With

Closed-loop feedback control system, regulates the position of fibre clip until described error is zero or in predetermined scope for the error between the center of fibre core (32) of target optical fiber (30) and the center of the fibre core (302) of fibre core calibrating element (300) that detect according to optical vision system.

13. calibration systems according to claim 12, is characterized in that, described preset range is-0.001mm to 0.001mm.

14. calibration systems according to claim 13, is characterized in that, described preset range is-0.3 μ m to 0.3 μ m.

15. 1 kinds of calibration systems, the position for calibration target optical fiber (30) at the through hole (21) of target lock pin (20), is characterized in that, described calibration system comprises:

Fibre core calibrating element (300), the fibre core (302) of described fibre core calibrating element (300) be centrally located in the determined theoretical center of the positioning datum place according to target lock pin (20);

Mobile system, in the position of the through hole (21) of target lock pin (20), the center of fibre core (32) of target optical fiber (30) and the center of the fibre core (302) of fibre core calibrating element (300) are aimed at for active adjustment target optical fiber (30) under the guiding of optical vision system.