JP3993040B2 - Ferrule eccentricity measuring device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a ferrule eccentricity measuring device that measures the eccentricity of an optical fiber insertion hole formed in a ferrule and the eccentricity of an optical fiber core attached to the ferrule.
[0002]
[Prior art]
A ferrule is attached to the tip of an optical fiber as a connector component of the optical fiber to protect and center the end of the ferrule. The shape of the pipe has an optical fiber insertion hole in the center or the center or one end of the pipe. There is a flanged type with a flange on the side.
[0003]
For example, a ferrule used for a single mode optical fiber having a clad diameter of 125 μm has an outer diameter of about 1.5 to 2.5 mm and an optical fiber insertion hole having an inner diameter of about 126 μm.
When performing optical connection using this ferrule, after polishing the end face of the ferrule attached to the tip of the optical fiber together with the optical fiber, insert the ferrule from both sides of the sleeve according to the outer diameter of the ferrule, The end faces of the optical fibers are joined together.
[0004]
In this case, even if the outer diameter and the inner diameter of the optical fiber insertion hole are formed with high accuracy, if the insertion hole is formed eccentrically from the center of the ferrule outer diameter, the optical loss at the connection portion is large. Become.
For example, in the case of a single mode optical fiber having a core diameter of 10 μm, the optical transmission efficiency is reduced to about 50% simply by the two ferrules to be faced being eccentric by 1 μm.
[0005]
For this reason, manufacturers inspect all manufactured ferrules, classify them according to the measured eccentricity, and use single-mode optical fibers that require high accuracy. Classification for optical fibers and even defective products that are not suitable as ferrules is made.
[0006]
FIG. 4 is an explanatory view showing such a conventional ferrule eccentricity measuring device.
The ferrule eccentricity measuring device 51 has a V-groove 4 for setting a ferrule W along a substantially horizontal imaging optical axis Z extending from the light source 2 to the imaging camera 3, and a rolling roller is placed on the ferrule W placed there. The image pickup device 3 can image the end face of the optical fiber insertion hole 6 and the eccentric amount of the optical fiber core attached to the ferrule while the 55 is in contact with the image pickup device. .
[0007]
The rolling roller 55 is attached to the tip of a rotating arm 57 that is rotated by an air cylinder 56. When the ferrule W is placed in the V groove 4, the piston rod 58 of the air cylinder 56 is extended and the arm 57 is directed downward. The roller 55 is rotated to contact the ferrule W.
[0008]
Here, when the light source 2 is turned on and the end surface is enlarged so that only the optical fiber insertion hole 6 is reflected, the portion of the optical fiber insertion hole 6 is white and the other portions are black. Therefore, the center coordinates C (x, y) of the white optical fiber insertion hole 6 are detected by performing image analysis.
[0009]
In this state, when the rolling roller 55 is activated and the ferrule W is rotated at a predetermined speed and the central coordinate C (x, y) is detected at a predetermined time interval, the central coordinate C (x, y) is changed. If there is not, it can be determined that the optical fiber insertion hole 6 is not eccentric, and if there is a change in the center coordinate C (x, y), it can be determined that the optical fiber insertion hole 6 is eccentric, and the center at that time 1/2 of the change width of the coordinates C (x, y) corresponds to the eccentricity.
At the same time, by measuring the horizontal or vertical diameter of the optical fiber insertion hole 6 while rotating the ferrule W, the roundness of the optical fiber insertion hole 6 can also be measured.
[0010]
[Problems to be solved by the invention]
By the way, such a ferrule eccentricity measuring device 51 has a problem that it takes a long time to inspect each ferrule and the processing efficiency is low.
The cause is automated after the ferrule W is set in the V-groove 4 until the measurement is completed. However, the operator manually sets the ferrule W in the V-groove 4 and removes it after the measurement is completed. It cannot be automated.
[0011]
By automating the ferrule W using a robot arm or the like so that it can be set and recovered from directly above the V-groove 4, not only the measurement time per piece can be shortened, but also full operation can be performed for 24 hours. Therefore, the processing efficiency per day increases dramatically.
However, since there is a rotating arm 57 that supports the rolling roller 55 directly above the V-groove 4, this interferes with the provision of a robot arm.
[0012]
In addition, since the ferrule W is manually set and recovered in the V-groove 4, a large space is secured above the V-groove 4 so that the hand can be freely put in and out while the rolling roller 55 is not in contact. For this reason, the rotation angle of the rotation arm 57 that supports the rolling roller 55 is set to be large and retracted to a position away from the V-groove 4.
Accordingly, the moving distance from the retracted position of the rolling roller 55 to the working position in contact with the ferrule W is long, and it takes time to advance and retract the rotating arm 57, and it takes a long time to measure each piece. was there.
[0013]
Therefore, the present invention reduces the advance / retreat time of the rolling roller by completely retracting the rolling roller from the upper position of the V-groove with a short moving distance, and sets the ferrule to the V-groove and completes the measurement of the ferrule. It is a technical problem to improve the processing efficiency by enabling the collection operation to be performed quickly and reliably.
[0014]
[Means for Solving the Problems]
In order to solve this problem, the invention of claim 1 of the present application sets a ferrule in a V-groove formed along a substantially horizontal imaging optical axis, and makes a rolling roller contact the ferrule while rotating it. In a ferrule eccentricity measuring device that measures an eccentricity of an optical fiber insertion hole and an eccentricity of an optical fiber core attached to a ferrule by imaging an end surface, a ferrule rotation that rotates a ferrule set in the V groove A mechanism is arranged with the rolling roller on the front end side, and a biaxial slide table arranged to be able to advance and retreat in the front-rear direction and the vertical direction of the imaging optical axis, and the rolling roller from the rearward retracted position of the imaging optical axis A table drive mechanism is provided that moves forward to a position directly above the V-groove and lowers from the advanced position to a working position that contacts the ferrule.
[0015]
According to the first aspect of the present invention, since the rolling roller is provided on the biaxial slide table that moves in the front-rear direction and the vertical direction, the rolling roller is lifted upward from the working position in contact with the ferrule to separate the rolling roller from the ferrule. The rolling roller can be completely retracted from directly above the V-groove with a slight movement distance of about 1 to 2 cm in both the vertical direction and the front-rear direction.
[0016]
Therefore, not only when the ferrule is set manually, but also when the ferrule is automatically set using a robot arm or the like, the rolling roller does not get in the way, and full automation can be achieved.
In addition, since the vertical and longitudinal travel distances can be shortened, the rolling roller advance / retreat time can be shortened, and the time required for measurement can be reduced both when the ferrule is set manually and when it is automated. Processing efficiency can be improved.
[0017]
In this case, if the cam mechanism described in claim 4 is used as the table driving mechanism, the rolling roller can be sequentially moved in one direction in two directions, ie, forward-downward or in the upward-backward two directions.
[0018]
According to a second aspect of the present invention, there is provided a ferrule transport mechanism that collects a measured ferrule from a V-groove and sets another ferrule, and passes a suction pickup that adsorbs the ferrule directly above the V-groove as an imaging optical axis. A robot arm that reciprocally moves along a substantially orthogonal horizontal direction, and a mounter in which a ferrule from which an eccentricity is to be measured is set in advance, and a measured ferrule dropped from a pickup are collected by class. The ferrule collection boxes described above are arranged along the movement trajectory of the pickup, and the mounter includes a tray on which the ferrules are arranged in a matrix, and a tray carrier that moves the tray to position each ferrule directly below the pickup. It is characterized by having prepared .
[0019]
According to the second aspect of the present invention, the ferrule set in the mounter is vacuum-adsorbed to the pickup, transported to a position just above the V-groove by the robot arm, and released from the pickup on the V-groove. The set ends.
When the measurement is completed, the ferrule set in the V-groove is vacuum-adsorbed to the pickup, transported to a predetermined collection box according to the measurement result, and released from the pickup on the collection box. Collected.
[0020]
If the mounter moves the tray in which the ferrules are arranged in a matrix as in claims 2 and 5 on the tray table so that the individual ferrules are located directly below the pickup, the pickup is always in a fixed place. Can be vacuum-sucked, so that even if the movement of the robot arm is simple, the ferrules can be reliably set in the V-groove one by one.
[0021]
Further, as in claim 6, a set pickup for conveying a ferrule to be measured for eccentricity from the mounter to the V-groove, and a collection for conveying the ferrule after measurement from the V-groove to the ferrule collection box. If two pickups are provided on the robot arm, the measurement time can be further shortened.
[0022]
In this case, the ferrule of the mounter is vacuum-sucked to the set pickup, and the robot arm is moved to the V groove.
Next, the ferrule that has been measured and set in the V-groove is vacuum-sucked on the recovery pickup, and the ferrule of the setting pickup is set in the V-groove.
Then, the ferrule vacuum-sucked by the recovery pickup may be released on a predetermined recovery box according to the measurement result while the robot arm returns to the mounter.
In this way, the ferrule can be set in the V-groove and the ferrule can be collected from the V-groove in parallel only by reciprocating the robot arm once.
[0023]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be specifically described below with reference to the drawings.
FIG. 1 is a schematic configuration diagram showing a main part of a ferrule eccentricity measuring device according to the present invention, and FIG. 2 is an overall configuration diagram thereof.
[0024]
1 and 2 show a ferrule eccentricity measuring apparatus 1 according to the present invention, in which a V-groove 4 for setting a ferrule W along a substantially horizontal imaging optical axis Z from a light source 2 to an imaging camera 3 is formed. An optical fiber attached to the ferrule or the eccentricity of the optical fiber insertion hole 6 by imaging the end face with the imaging device 3 while rotating the rolling roller 5 in contact with the ferrule W placed there. The eccentricity of the core can be measured.
[0025]
This ferrule eccentricity measuring apparatus 1 collects a ferrule rotating mechanism 7 that rotates a ferrule W set in a V-groove 4, and another ferrule W that collects a measured ferrule W from the V-groove 4 and intends to measure it. Is provided.
[0026]
The ferrule rotating mechanism 7 has a rolling roller 5 arranged on the tip side and a biaxial slide table 9 arranged to be able to advance and retreat in the front-rear direction and the up-down direction of the imaging optical axis Z, and to drive the table 9 up and down and up and down. A table driving mechanism 10 for rotating the roller 5 and a motor 11 for rotating the rolling roller 5 are provided.
[0027]
The slide table 9 includes a Z table 9Z that slides back and forth along the imaging optical axis Z direction on the fixed base 12, and a Y table 9Y that can be moved up and down on the Z table 9Z. The rolling roller 5 and its drive motor 11 are supported.
The Z table 9Z is urged forward by a spring 13Z and stopped at a front end position by a stopper (not shown) formed on the fixed base 12, and the Y table 9Y is urged upward by a spring 13Y. The stopper (not shown) provided on the Z table 9Z is stopped at the upper end position and the lower end position.
[0028]
The table drive mechanism 10 also includes a Z-direction moving cam (first cam) 15Z that moves the Z table 9Z in the front-rear direction along the imaging optical axis Z, and the Y table 9Y in the vertical direction with respect to the imaging optical axis Z. A Y-direction moving cam (second cam) 15 </ b> Y to be moved is attached to the rotating shaft 17 of one motor 16.
The first cam 15Z is engaged with a cam groove 18Z formed in the Z table 9Z, and when the motor 16 is rotated in the forward direction from 0 to 180 °, for example, the first cam 15Z is rotated in the first half of rotation of 0 to 120 °. When the moving roller 5 is advanced to the position directly above the V-groove 4 and the Z table 9Z comes into contact with a stopper (not shown) formed on the fixed base 12 (120 °), the cam 15Z is played. It has become.
The second cam 15Y is brought into contact with a driven plate 18Y formed on the Y table 9Y, and the cam displacement is set to 0 so that the Y table 9Y does not move up and down in the first half of rotation of 0 to 120 °, and 120 to 180. The Y table 9Y is lowered in the second half of the rotation of the angle, and is stopped when the Y table 9Y comes into contact with a lower limit stopper (not shown) formed on the Z table 9Z.
[0029]
As a result, when the Z table 9Z is positioned at the rear end position and the Y table 9Y is positioned at the upper end, and the cams 15Z and 15Y are synchronously rotated in the forward direction by the motor 16, the first half of the rotation is performed. The rolling roller 5 moves forward by about 2 cm from the rearward retracted position P ₀ of the imaging optical axis Z to the position P ₁ directly above the V-groove 4, and the rolling roller 5 contacts the ferrule W in the latter half of the rotation. position is approximately 1cm lowered to P _2, the rolling roller is moved by one action from the retracted position P ₀ to the working position P _2.
Further, when it is rotated synchronously in opposite directions, to be moved in one action from the working position P ₂ to the retracted position P _0.
[0030]
The rotating shaft of the rolling roller 5 is provided with a slight inclination with respect to the V-groove 4, and when the ferrule W is rotated by the rolling roller 5, the ferrule W is moved to the camera 3 by the friction of the rolling roller 5. It is energized to the side.
Thus, the ferrule W is always pressed against the ferrule stopper 19 placed between the V-groove 4 and the imaging camera 3, and in this state, the imaging camera 3 moves the end surface of the ferrule W. To focus on.
The stopper 19 is formed with a through hole 19a coaxially with the imaging optical axis Z. The through hole 19a is formed such that the ferrule side opening is thicker than the optical fiber insertion hole 6 and thinner than the outer diameter, and the camera side opening is enlarged.
Accordingly, light that becomes noise through the outer side of the ferrule W is reliably blocked, and light that is transmitted through the optical fiber insertion hole 6 and diffused from the end surface of the ferrule W can be incident on the imaging camera 3 without being blocked. It can be done.
[0031]
The ferrule transport mechanism 8 has a pickup 21A for setting the ferrule W in the V-groove 4 at the lower end of the robot arm 20, and a pickup 21B for collecting the ferrule W that has been measured from the V-groove 4 vertically. It is provided to be stretchable.
[0032]
The robot arm 20 is disposed so as to be able to travel on the guide rail 22 so as to reciprocate the pickups 21A and 21B along the horizontal left and right directions that pass right above the V-groove 4 and are substantially orthogonal to the imaging optical axis Z. Yes.
Each pickup 21A and 21B is formed with an air circuit (not shown) for individually sucking and stopping air.
[0033]
Further, the mounter 23 in which the ferrule W to be measured for the eccentricity is set in advance along the pickups 21A and 21B, and the measured ferrule W dropped from the pickup 21B is, for example, from high grade products to defective products 6 Eight ferrule collection boxes 24A to 24H are provided that are divided into stages and collected by class.
[0034]
The mounter 23 includes a supply stocker 26A for stacking trays 25 in which ferrules W are arranged in a matrix, a collection stocker 26B for stacking empty trays 25, and an uppermost tray of the supply stocker 26A. 25 is moved to position the individual ferrules W directly below the pickup position of the pickup 21A, and a tray carrier 27 is provided for sending the empty tray 25 to the collection stocker 26B.
[0035]
Each stocker 26A and 26B is provided with a level adjusting device (not shown) that keeps the height of the tray 25 placed at the uppermost level constant regardless of the number of stacked trays 25. ing.
Further, the tray 25 is formed with a recess (not shown) for placing the individual ferrules W in the same direction, and the depth is formed deeper than the outer diameter of the ferrules W so that the trays 25 are stacked. The ferrule W is formed so as not to protrude from the upper surface of the tray 25.
[0036]
Furthermore, in this example, the light source 29 and the imaging camera 30 that are imaging optical systems for measuring the outer diameter that image the horizontal upper end surface of the ferrule W set in the V groove 4 along the horizontal direction orthogonal to the imaging optical axis Z. Is arranged.
[0037]
The above is one configuration example of the present invention, and the operation thereof will be described next.
When starting a measurement, first, to wait for the rolling roller 5 of the ferrule rotating mechanism 7 to the retracted position P _0, previously loaded with one or more trays 25 equipped with a ferrule W ... to supply stocker 26A.
[0038]
When turning on the switch (not shown), uppermost tray 25 of the feed stockers 26A in tray carrier 27 so that movement, is positioned directly below the suction position Q ₁ first ferrule W is due to the set for the pickup 21A .
[0039]
Next, when the robot picks up the set pickup 21A directly above the suction position by the robot arm 20 and lowers the tip to a position where it comes into contact with the ferrule W, the ferrule W is vacuum-sucked and then set pickup 21A Is contracted to move the robot arm 20.
[0040]
When the set pickup 21A is positioned right above the V-groove 4, the set pickup 21A is extended again. When the ferrule W is lowered to a position where it contacts the V-groove 4, the pickup 21A is released to the atmosphere, and the ferrule W is released onto the V groove 4.
[0041]
Next, when the cause of the rotation shaft 17 in the forward direction by a predetermined angle by the motor 16, directly above the V-groove 4 that Z table 9Z by the cam 15Z to rotate the first half is moved tumbling roller 5 from the retracted position P ₀ advanced to P _1, then the Y table 9Y by the cam 15Y to rotate the second half-life is rolling roller 5 is pressed downward is lowered to the working position P ₂ to be in contact with the ferrule W.
[0042]
At this time, advancing amount is only 2cm from the retracted position P ₀ to just above P ₁ of the V-groove 4, drop of the work to a position P ₂ to be in contact with the ferrule W is slightly 1cm only without addition, two cams Since the rolling roller 5 can be moved in two directions by a one-action operation in which the motor 16 rotates the 15Z and 15Y synchronously at a predetermined angle, the movement time is extremely short.
[0043]
Here, when the motor 11 of the ferrule rotating mechanism 7 is activated to rotate the rolling roller 5, the ferrule W that contacts the rotating roller 5 is rotated in the V groove 4, and the rotating shaft of the rolling roller 5 is the V groove 4. Therefore, the tip end surface of the ferrule W is pressed against the ferrule stopper 19 by the friction of the rolling roller 5.
[0044]
At this time, since the imaging camera 3 is focused on the distal end surface of the ferrule W, the light is transmitted through the optical fiber insertion hole 6 so that the portion is white and the other portions are displayed in black. Thus, the amount of eccentricity of the optical fiber insertion hole 6 is measured, and the variation in the external dimensions can be measured by the imaging camera 30.
[0045]
When the ferrule W is rotated once by the measurement ends, retracting the rolling roller 5 to the retracted position P _0.
Also in this case, since the moving distance of the rolling roller 5 is short, the moving time is very short, and the measuring time per piece is shortened, and the processing efficiency is improved.
[0046]
When recovering the measured ferrule, the ferrule W to be set next is attracted to the setting pickup 21A in the same manner as described above, and the recovery pickup 21B is positioned and extended just above the V-groove, At the time of contact with the ferrule W, vacuum suction is performed.
[0047]
Then, after setting the ferrule W attracted by the setting pickup 21A in the V-groove 4, the ferrule W vacuum-sucked by the recovery pickup 21B is released immediately above the class collection boxes 24A to 24H according to the measurement results. If it does, it will be classified and collected automatically.
[0048]
As described above, according to this example, if the tray 25 on which the ferrule W to be measured is set is loaded on the supply stocker 26A of the mounter 23, the individual ferrules W from the tray 25 become V-grooves. 4, after the amount of eccentricity of the optical fiber insertion hole 6 is measured, it can be performed fully automatically until it is classified according to the measurement result.
[0049]
In addition, since the moving distance of the rolling roller 5 is short and the rolling roller 5 can be moved in two directions by a one-action operation of rotating the motor 16 by a predetermined angle, the moving time is very short.
Therefore, not only when the ferrule W is automatically set in the V-groove 4 by the ferrule transport mechanism 8 to measure the eccentricity, but the ferrule W is manually set in the V-groove 4 to adjust the eccentricity. Also in the case of performing the measurement, since the moving time of the rolling roller 5 is shortened, the processing efficiency is improved.
[0050]
In the above description, the ferrule eccentricity measuring device 1 has been described with respect to the case where the ferrule W is automatically set in the V groove 4 by the ferrule transport mechanism 8, but the ferrule rotation mechanism 7 does not have the ferrule transport mechanism 8. It can also be applied to a ferrule eccentricity measuring device.
[0051]
In addition to measuring the eccentricity of the optical fiber insertion hole 6, the ferrule W attached to the tip of the optical fiber is set in the V-groove 4 by manual work, and the other end of the optical fiber is connected to the light source. Thus, the eccentricity of the optical fiber core can also be measured.
[0052]
【The invention's effect】
As described above, according to the present invention, the rolling roller can be completely retracted from the upper position of the V-groove with a short moving distance. Therefore, when the ferrule is automatically set in the V-groove by the robot arm, Of course, even when manually setting the V-groove, the advance / retreat time is shortened, and as a result, the measurement time of each ferrule can be shortened to improve the processing efficiency.
[0053]
If a ferrule transport mechanism using a robot arm is provided, the ferrule set on the mounter can be automatically transported to the V-groove, and when the eccentricity measurement is completed, it is set in the V-groove. Since ferrules that have been collected can be collected in a collection box for each class according to measurement results, ferrule setting / recovery operations can be performed quickly and reliably, so that the processing efficiency is also improved. There is.
[Brief description of the drawings]
FIG. 1 is a schematic configuration diagram showing a main part of a device of the present invention.
FIG. 2 is a front view showing an overall configuration.
FIG. 3 is a plan view showing an overall configuration.
FIG. 4 is a schematic configuration diagram showing a conventional apparatus.
[Explanation of symbols]
1 ... Ferrule eccentricity measuring device 2 ... Light source 3 ... Imaging camera Z ......... Imaging optical axis W ... Ferrule 4 ... V groove 5 ... Rolling roller 6 ......... Optical fiber insertion hole 7... Ferrule rotation mechanism 8... Ferrule transport mechanism 9... Biaxial slide table 9 Y. Y table 9 Z. …… Fixed base 13Y …… Spring 13Z …… Spring 15Z …… Z-direction moving cam (first cam)
15Y …… Y-direction moving cam (second cam)
16 ......... Motor 20 ......... Robot arm 21A ... Set pickup 21B ... Recovery pickup 23 ......... Mounters 24A-24H ......... Ferrule collection box 25 ......... Tray 27 ......... Tray carrier

Claims (6)

A ferrule is set in a V-groove formed along a substantially horizontal imaging optical axis, and a rolling roller is brought into contact with the ferrule and rotated to take an image of the end face thereof, thereby determining the eccentricity of the optical fiber insertion hole and the ferrule. In the ferrule eccentricity measuring device for measuring the eccentricity of the attached optical fiber core,
A two-axis slide table in which a ferrule rotating mechanism that rotates a ferrule set in the V-groove is arranged so that the rolling roller is arranged on the tip side and can be moved back and forth in the front-rear direction and the vertical direction of the imaging optical axis; A ferrule eccentric amount comprising a table drive mechanism that moves the rolling roller forward from a rearward retracted position of the imaging optical axis to a position just above the V-groove and lowers from the advanced position to a working position that contacts the ferrule. measuring device. A ferrule is set in a V-groove formed along a substantially horizontal imaging optical axis, and a rolling roller is brought into contact with the ferrule and rotated to take an image of the end face thereof, thereby determining the eccentricity of the optical fiber insertion hole and the ferrule. In the ferrule eccentricity measuring device for measuring the eccentricity of the attached optical fiber core,
A ferrule transport mechanism that collects a measured ferrule from the V groove and sets another ferrule reciprocates the ferrule suction pickup along a horizontal direction that passes right above the V groove and is substantially orthogonal to the imaging optical axis. A mounter that has a robot arm and pre-sets ferrules whose eccentricity is to be measured, and two or more ferrule collection boxes that collect the measured ferrules dropped from the pickup by class, the movement trajectory of the pickup Arranged along the
The ferrule eccentricity measuring device , wherein the mounter includes a tray for arranging ferrules in a matrix and a tray carrier for moving the tray to position each ferrule directly below the pickup . A ferrule is set in a V-groove formed along a substantially horizontal imaging optical axis, and a rolling roller is brought into contact with the ferrule and rotated to take an image of the end face thereof, thereby determining the eccentricity of the optical fiber insertion hole and the ferrule. In the ferrule eccentricity measuring device for measuring the eccentricity of the attached optical fiber core,
A ferrule transport mechanism that collects a measured ferrule from the V groove and sets another ferrule reciprocates the ferrule suction pickup along a horizontal direction that passes right above the V groove and is substantially orthogonal to the imaging optical axis. A mounter that has a robot arm and pre-sets a ferrule whose eccentricity is to be measured, and two or more ferrule collection boxes that collect the measured ferrules dropped from the pickup by class. Arranged along the
A two-axis slide table in which a ferrule rotating mechanism that rotates a ferrule set in the V-groove is arranged so that the rolling roller is arranged on the tip side and can be moved back and forth in the front-rear direction and the vertical direction of the imaging optical axis; A ferrule eccentric amount comprising a table drive mechanism that moves the rolling roller forward from a rearward retracted position of the imaging optical axis to a position just above the V-groove and lowers from the advanced position to a working position that contacts the ferrule. measuring device.   The table driving mechanism includes a first cam that moves the slide table in the front-rear direction with respect to the imaging optical axis, and a second cam that moves the slide table in the vertical direction with respect to the imaging optical axis. When the motor rotates synchronously, the rolling roller is advanced to the V-groove position by the first cam in the first half of the rotation until the position where the rolling roller contacts the ferrule in the second half of the rotation. The ferrule eccentricity measuring device according to claim 1 or 3, wherein the ferrule eccentricity measuring device is lowered. 4. The ferrule eccentricity measuring device according to claim 3, wherein the mounter of the ferrule transport mechanism comprises a tray on which ferrules are arranged in a matrix and a tray carrier that moves the tray to position each ferrule directly below the pickup.   The robot arm includes a set pickup for conveying a ferrule to be measured for eccentricity from the mounter to the V-groove and a collection pickup for conveying the measured ferrule from the V-groove to the ferrule collection box. The ferrule eccentricity measuring device according to claim 2 or 3.

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