JP2002023019A - Assembling device for optical element module and optical axis control method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an assembling device and an optical axis control method, by which the optical axis of an optical fiber can be controlled at high speed when assembling an optical element module in double lens configuration. SOLUTION: A fiber bundle 20 capable of transmitting a laser beam image is provided on a movable mechanism 5, which can be moved in the direction of the optical axis and can be stopped at any arbitrary position, and the optical axis is controlled at high speed by an optical axis position measuring means equipped with a mechanism, in which one side of the fiber bundle 20 is located on the optical axis of an LD and a second lens and the other side is located on an optical system and a camera 3 capable of picking up an image, capable of measuring the optical axis of the optical module from a distant position while saving the space.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a semiconductor laser.
(Hereinafter abbreviated as LD), a device for assembling an optical element module used in assembling an element module for optical communication composed of a lens and an optical fiber, in particular, an optical element module constituting an optical axis adjusting portion of the optical fiber The present invention relates to an assembling apparatus and an optical axis adjusting method.

[0002]

2. Description of the Related Art In a communication optical element module having a configuration in which light emitted from an LD is condensed by a lens and incident on an optical fiber, positioning of components constituting the module is performed in order to obtain good optical coupling. Adjust the axis and assemble.

An optical element module uses two lenses, a first lens for receiving light emitted from an LD and a second lens for condensing light emitted from the first lens and entering the optical fiber. There are things. An optical element module using two lenses is characterized in that the tolerance of the lens axis shift is loose and the manufacturability is good. In addition, since there is a characteristic that the loss due to optical coupling can be reduced, this configuration is frequently used in an optical element module that requires high performance despite having a large number of components such as two lenses.

In the manufacture of an optical element module, it is necessary to precisely align the optical axis of the second lens with the position of the optical fiber, that is, to adjust the optical axis. In the conventional optical axis adjustment method, an optical axis adjustment is performed while observing the optical output from the end of an optical fiber using an optical output measuring device, and a position where the optical output is maximized is found. However, the conventional method requires a long adjustment time, and requires a method for performing optical axis adjustment at high speed.

For example, in Japanese Patent Laid-Open No. 8-297229, a CCD camera is used to measure two points of a light beam of an LD, and a shift amount between a position where light should be originally focused and a position where light is currently focused is calculated. A method has been proposed in which the stage is driven to adjust the optical axis to a position where light should be originally collected in a very short time.However, since a CCD camera is provided above the optical axis, it is difficult to adjust the optical axis of the optical fiber. Moreover, since it is an optical axis adjustment device for an optical element module that does not use the second lens, it is difficult to apply it to the manufacture of an optical element module that uses the second lens.

In Japanese Patent Application Laid-Open No. 9-43456, the position of a laser spot of an optical element module is imaged using an infrared imaging tube camera, and the optical fiber held by a fiber chuck is moved on an XY stage, and the end of the optical fiber is moved. There has been proposed a method of positioning the laser beam to the laser spot. However, in the case of an optical element module for fixing an optical fiber by laser welding or the like, if an infrared imaging tube camera is arranged above the optical axis, the entire apparatus becomes large, and laser welding is not performed. There is a problem that it is difficult to dispose the projection optical unit, and a large evacuation time is required even when the infrared imaging tube camera is evacuated on a Z stage or the like, which hinders speeding up the optical axis adjustment.

[0007]

SUMMARY OF THE INVENTION The present invention provides an apparatus for assembling an optical element module for shortening the optical axis adjustment time in the manufacture of the optical element module, and more particularly, to a structure of an optical fiber optical axis adjusting section and an optical axis adjusting method. The purpose is to do.

[0008]

In order to achieve the above object, in an apparatus for manufacturing an optical element module in which an LD, an optical fiber, and a lens are assembled by adjusting the optical axis, an optical axis of the optical fiber and the lens is adjusted. Imaging means for performing an optical axis adjustment of an optical fiber to obtain an image output of an output beam of the lens near the optical axis of the LD and the lens at a position away from the optical axis while changing the position of the image A processing device for calculating position data from an image obtained by the imaging means; a positioning means for positioning the optical fiber using the position data; and measuring an output of the optical fiber when adjusting the positioning means. A light output measuring device.

In a particularly preferred embodiment of the present invention, a fiber bundle for transmitting an optical image by the imaging means, a moving mechanism for moving one end of the fiber bundle near the optical axis of the lens and stopping at an arbitrary position, An optical system and a camera for capturing the transmitted optical image are provided at the other end of the fiber bundle.

Further, according to the optical fiber optical axis adjusting method of the present invention, in the above-mentioned apparatus for assembling an optical element module of the present invention, the LD is set to a light emitting state, the lens is set to a predetermined position, and the light is emitted from the lens. The laser beam image near the convergence position is focused at a position separated from the vicinity of the convergence position, the data of the beam convergence position is measured, and the measured data is measured. The optical fiber holding device to be assembled is moved to a predetermined position.

According to the apparatus and the method of the present invention, in the assembly and manufacture of an optical element module using a lens, the optical axis of the optical element module can be measured from a remote position in a space-saving manner. After performing the axis adjustment, it is possible to install a laser welding fixing device that welds the lens unit and the optical fiber unit near the optical fiber, and it is possible to shorten the moving time of the laser welding fixing device etc. and further adjust the optical axis In addition, the speed of assembling the optical element module can be increased.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an optical device module assembling apparatus according to the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view of an embodiment of an apparatus for assembling an optical element module according to the present invention. FIG. 2 is a side view showing a main configuration of the optical device module assembling apparatus. Before describing the embodiments of the present invention, the structure and optical coupling state of an optical element module assembled by the assembling apparatus of the present invention will be described with reference to FIG.

As shown in FIG. 3A, the optical element module includes a package 16 having a laser diode (LD) 10, an isolator module 17, and an optical fiber 1
4 and a holder 19 for holding the input end.
A stem 15 on which the LD 10 is mounted is included in the package 16.
And a first lens 11 which is built in the cylindrical lens holder 18 and converts divergent light from the LD 10 into parallel light. The isolator module 17 has a built-in isolator 12 and a second lens 13 for converging parallel light.

After alignment of the optical axis, the lens holder 18 holds the stem 1
5 and the lens holder mounting surface. The stem 15 to which the lens holder 18 is connected and fixed is the package 1
6 and the package 16 is sealed. After the package 16 is hermetically sealed, the optical axis of the optical fiber 14 and the isolator module 17 having the second lens 13 and the isolator 12 as one component are adjusted and fixed by laser welding.

FIG. 3B is a diagram showing only the optical system shown in FIG. 3A, and the divergent light emitted from the LD 10 is:
The light becomes parallel light through the first lens 11 and becomes an isolator 12
And is converged by the second lens 13 and enters the optical fiber 14. The isolator 12 has a function of removing return light from the second lens 13, the optical fiber 14, and the like.

The optical axis adjustment in the two-lens type optical element module includes the following two contents.

(1) The laser light emitted from the first lens 11 is substantially parallel light, and its optical axis is parallel to the outer shape of the stem 15. This is because the isolator module 17 is fixed to the package 16 in which the stem 15 is stored. (2) When the isolator module 17 and the optical fiber 14 are assembled, the amount of light incident on the optical fiber 14 is maximized. The optical fiber optical axis adjusting section and the method of the optical element module assembling apparatus of the present invention are directed to the above (2).

The optical device module assembling apparatus shown in FIG. 1 includes an operation panel 1 on which an operator operates, an optical fiber
Laser welding outgoing optical part 2 for welding and fixing
An infrared imaging tube camera 3 for remotely detecting and imaging an optical image of the light beam from the optical element module at a position away from the optical axis; a YAG laser oscillator 4 for outputting a YAG laser to the YAG laser welding emission optical unit 2; A fiber bundle positioning mechanism 5 for positioning a fiber bundle for detecting a light beam from the module, and a package 16;
An optical axis adjustment stage 6 for adjusting the optical axis to a position where the amount of light incident on the isolator module 17 and the optical fiber 14 is maximum, an isolator adjustment stage 7 for positioning and adjusting the isolator module 17 when performing the optical axis adjustment, When performing the optical axis adjustment, the optical fiber 1
4 comprises an optical fiber adjustment stage 8 for adjusting the position of the optical fiber 4. FIG. 1 does not show the package 16, the isolator module 17, the optical fiber 14, and the optical fiber holder 19 that constitute the optical element module.

As shown in FIG. 2, a main part of the optical device module assembling apparatus is composed of a fiber bundle 20 and a package 16 for detecting a convergence position of convergence light emitted from a second lens in an isolator module 17. A fiber detector 50 for detecting the total amount of light emitted is fixed by the fiber bundle positioning mechanism 5, and a fiber bundle vertical movement unit 35 and a fiber bundle XY movement unit that can move vertically and in the XY (plane perpendicular to the paper) direction. 34, an infrared imaging tube camera 3 for photographing an image of the light beam incident on the fiber bundle 20 at the other end of the fiber bundle 20 and displaying an image for confirming the convergence position of the light beam, and incident on the optical fiber 14. A package fixing mechanism 32 for holding and fixing the package 16 containing the LD 10 in order to adjust the optical axis to a position where the amount of light becomes maximum.
An optical axis adjustment stage 6 having an optical axis adjustment XYθ moving unit 31 that can move the isolator module 17 in the XYθ direction, and an isolator holding mechanism 39 for positioning and adjusting the isolator module 17 when performing the optical axis adjustment.
An isolator adjusting stage 7 having an isolator vertical moving part 38 and an isolator XY moving part 37 that can move in the vertical and XY directions while being gripped by the fiber, a fiber holder 19 for holding and positioning the optical fiber 14 and a fiber holder for holding the optical fiber 14 An optical fiber fiber holder XY moving part 40 which can hold the fiber holder vertical moving part 41 and the optical fiber vertical moving part 43 which can be moved in XY by independently holding the fiber holder vertical moving part 41 which is gripped at the same center by the gripping mechanism 42 and the optical fiber gripping mechanism 44; The optical fiber adjustment stage 8 and the power meter 33 for detecting the output of the optical fiber 14 are configured on the base 30.

In order to fix the isolator module 17, the optical fiber 14, the fiber holder 19, and the package 16 after each positioning adjustment, a YAG laser welding moving up and down and back and forth is provided above the optical axis adjustment stage 6. A plurality of YAG laser welding output optical units 2 capable of welding and fixing with a YAG laser are arranged at an optimum position in a projection optical unit vertical moving unit 45 and a YAG laser welding output optical unit back-and-forth moving unit 46, and these are operated in an optimal operation. Control unit 48, power detection adjustment control unit 47, overall control unit 4
9.

FIG. 4 is a flowchart showing the overall operation of the optical fiber assembling apparatus shown in FIG. 1 and a process flow of the optical axis adjusting method according to the present invention. First, the package 16, the isolator module 17, and the optical fiber 14 are manually supplied to the assembling apparatus (S200). Next, when the automatic start switch on the operation panel 1 is turned on (S201), the package 16, the isolator module 17, and the light set on the optical axis adjustment stage 6, the isolator adjustment stage 7, and the optical fiber adjustment stage 5, respectively. Fiber 14
Is automatically conveyed and is initially positioned at a preset position (S202).

Next, the mounting height of the isolator module 17 was measured to correct the welding height of the YAG laser (S
203), package 16 and isolator module 1
The surface of the welding surface of No. 7 is aligned (S204). After the completion of the surface alignment, the optical axis adjustment stage 6 is rotated by θ to align the polarization planes of the package 16 and the isolator module 17 (S205). Then, the coordinate data when the correction is made is read (S206).

Next, the mounting height of the optical fiber 14 is measured to correct the YAG laser welding height (S207), and the optical fiber is moved to the XYZ coordinate position (on the optical axis) recognized by the image detection. Positioning is performed (S208). Next, the optical fiber 14 is adjusted in the XYZ directions and the package 16 is adjusted in the XY directions, and the adjustment is repeated up to the position where the optical output becomes maximum (S209).

After the completion of the optical axis adjustment, the isolator module 17 and the package 16 are fixed by welding with a YAG laser (S210). Next, the welding surfaces of the isolator module 17 and the fiber holder 19 are aligned (S21).
1) After that, the optical fiber 14 is adjusted in the XYZ directions,
The adjustment is repeated until the position where the light output becomes maximum (S21)
2). After the completion of the optical axis adjustment, the optical fiber 14 and the fiber holder 19 are fixed by welding with a YAG laser (S21).
3). Next, the welding surfaces of the isolator module 17 and the fiber holder 19 are aligned again (S21).
4) Then, the fiber 14 is adjusted in the X and Y directions, and the adjustment is repeated until the position where the optical output is maximized (S215).
After the completion of the optical axis adjustment, the fiber holder 19 and the isolator module 17 are fixed by welding with a YAG laser (S2).
16). Optical element module 21 completed through the above steps
Is transported by the optical axis adjustment stage 6 to the take-out place (S217), and the finished product is manually removed (S21).
8) A series of assembling operations of the optical element module is completed.

The method of adjusting the optical axis of the optical fiber in a series of assembly of the optical element module will be described below in detail. FIG. 5A is a view for explaining a surface-matching operation for bringing the portion where the isolator module 17 and the package 16 are fixed by welding into complete close contact. In FIG. 5A, by driving an isolator adjustment stage 7 (not shown), the lower end of the isolator module 17 is lowered to a position where it contacts the upper end of the package 16, and the isolator adjustment stage 7 is further driven from that position. Then, the isolator module 17 is lowered in the Z direction, and the lower end surface of the isolator module 17 is pressed against the upper end surface of the package 16, whereby the angle of the optical axis adjustment stage 6 is slightly changed. The upper end surface of the package 16 becomes completely parallel, and the surface matching operation between the isolator module 17 and the package 16 is completed.

FIG. 5B is a diagram for explaining the operation of aligning the polarization plane between the package 16 and the isolator module 17. After the surface matching operation, as shown in FIG. 5B, the fiber bundle positioning mechanism 5 (not shown) is driven to move the photodetector 50 directly above the isolator module 17, and the package 16 is moved. , A laser beam is emitted from the upper end of the package 16.
The laser beam emitted from the package 16 passes through the inside of the isolator module 17 and then enters the photodetector 50. Next, the optical axis adjustment stage 6 is rotated in the θ direction, and the optical axis adjustment stage 6 is stopped at a position where the laser output incident on the photodetector 50 becomes maximum.

FIG. 5C is a diagram for explaining the light beam image detecting operation by the fiber bundle 20. In FIG. 5C, the fiber bundle positioning mechanism (not shown) is driven, and the fiber bundle 2 is placed immediately above the isolator module 17.
Position 0. Next, while photographing the other end of the fiber bundle 20 with the infrared imaging tube camera 3 (not shown), the fiber bundle positioning mechanism 5 (not shown) is driven in the XY directions,
The fiber bundle 20 is stopped at a position where the laser light enters the center of the fiber bundle 20. While lowering the fiber bundle 20 from this position in the Z direction, the movement of the fiber bundle 20 is stopped at a position where the area of the image of the laser light captured by the infrared imaging tube camera is minimized. Since the area of the image of the laser light is minimized when the end face of the fiber bundle 20 is located at a position where the laser light emitted from the isolator module 17 converges, by determining the position where the detection area is minimized, Position data at which the laser light converges can be obtained.

FIG. 6A is a view for explaining an optical axis adjusting operation for adjusting the positional relationship between the package 16 and the isolator module 17 to an optimum one. As shown in FIG. 6A, the optical fiber adjustment stage 8 (not shown) is driven to move the optical fiber 14 and the fiber holder 19 directly above the isolator module 17. At this time, FIG.
The tip of the optical fiber 14 is positioned using the data of the position where the laser light converges obtained in (c). From this state, the optical output measuring device 3 connected to the other end of the optical fiber 14 is moved while slightly moving the optical fiber 14 in the XYZ directions.
The position where the optical output measured at 3 (not shown) becomes maximum is determined, and the optical fiber 14 is stopped at that position. Next, the optical axis adjustment stage 6 is slightly moved in the X and Y directions, and the positional relationship between the package 16 and the isolator module 17 is changed to finely adjust the incident angle when the laser light is incident on the optical fiber 14. The optical output is measured by the output measuring device 33, and at the position where the optical output is maximized, the package 1
Stop 6.

Next, as shown in FIG. 6 (b), a YAG laser welding output optical unit positioning mechanism (not shown) is driven,
The three YAG laser welding emission optical units 2 are lowered, and the joining surfaces of the package 16 and the isolator module 17 are fixed by welding at three points. Then the isolator gripping mechanism 39
Is released, and while the optical axis adjustment stage 6 is rotated in the θ direction, multi-point welding of the joint surface between the package 16 and the isolator module 17 is performed. After the welding is completed, an isolator adjustment stage (not shown) is driven, and the isolator holding mechanism is driven.
Evacuate 39 to the right.

Next, as shown in FIG. 6C, a surface matching operation is performed to bring the lower end surface of the fiber holder 19 and the upper end surface of the isolator module 17 into close contact by welding. In FIG. 6C, by driving an optical fiber adjustment stage (not shown), the optical fiber 14 and the fiber holder 19 are lowered in the Z direction, and the lower end surface of the fiber holder 19 is placed on the upper end surface of the isolator module 17. By pressing, the angle of the optical axis adjustment stage 6 changes minutely, and the lower end surface of the fiber holder 19 and the upper end surface of the isolator module 17 are completely parallel to each other.
Is completed.

After the completion of the surface alignment, as shown in FIG. 7A, the optical fiber adjustment stage (not shown) is again moved to XY.
The optical fiber 14 is moved in the Z direction,
The optical fiber 14 is positioned at a position where the optical output measured by (not shown) is maximum.

Next, as shown in FIG. 7 (b), YAG laser welding output optical unit positioning mechanisms 45, 46 (not shown).
To move the three YAG laser welding output optical units 2 to weld and fix the optical fiber 14 and the fiber holder 19. Then, after the fiber holder 19 and the isolator module 17 were again subjected to the surface alignment according to the above procedure,
The fiber holder 19 is slightly moved in the X and Y directions, and FIG.
As shown in (2), the fiber holder 19 is positioned at a position where the light output becomes maximum.

Next, the fiber holder 19 and the isolator module 17 are fixed by welding.

As shown in FIG. 8 (b), the YAG laser welding and emitting optical unit positioning mechanisms 45 and 46 (not shown) are driven to move the three YAG laser welding and emitting optical units 2 and the fiber holder 19 is moved. And isolator module 1
7 are welded and fixed at three points. Next, the fiber holder holding mechanism 42 and the optical fiber holding mechanism 44 are released, and the joint surface between the fiber holder 19 and the isolator module 17 is subjected to multipoint welding while rotating the optical axis adjustment stage 6 in the θ direction. The optical element module 21 is completed by the above procedure.

FIG. 9 shows a second lens 13 in still another embodiment of the optical device module assembling apparatus according to the present invention.
2 shows an assembling position adjusting unit for connecting the optical fiber 14 and the optical fiber 14. In this embodiment, a light receiving plate for visualizing the condensed laser light is used instead of the fiber bundle which is a means for obtaining a light beam image at a remote place in the embodiment shown in FIG. . Other optical fiber adjustment stages, optical axis adjustment stages, etc. are the same as those shown in FIG.
Omit description. 11, reference numeral 90 denotes an alternative light source having the same wavelength as that of the LD 10, reference numeral 91 denotes a light receiving plate for visualizing the laser light condensed by the second lens 13, and reference numeral 92 denotes a collection of the laser light visualized by the light receiving plate 91. This is a camera for recognizing the light state, and includes a motor 93 for moving the position of the light receiving plate 91 in accordance with the condensing state of the laser light recognized by the camera 92, and a control device 94 for controlling the motor 93.

The divergent light from the alternative light source 90 is transmitted to the second lens 13
Is visualized on the light receiving plate 91 via the light receiving device, and has a minimum spot diameter at the focal position. Therefore, the spot diameter on the surface of the light receiving plate 91 is recognized by the camera 92, and data of a position (hereinafter referred to as WD) at which the minimum spot diameter is obtained. Is detected by moving the light receiving plate 91 in the front-rear direction with respect to the laser beam by the motor 93, whereby the focal position variation unique to the second lens 13 is grasped in advance. Second lens 13 and optical fiber 14
In the position adjustment of (1) and (2), the distance between the second lens 13 and the optical fiber 14 is set to WD, so that the focal position variation unique to the second lens 13 can be absorbed. Become.

[0038]

As described above, according to the present invention, when assembling a package including an LD, a converging lens, and an optical element module comprising an optical fiber, the converging position of the laser beam by the converging lens is determined by the optical element. An optical image is captured at a position distant from the optical axis of the module, and the optical axis adjustment of the optical fiber can be performed with high accuracy and in a short time in order to perform subsequent accurate optical axis alignment using the position data. It becomes possible.

[Brief description of the drawings]

FIG. 1 is a perspective view of an embodiment of an apparatus for assembling an optical element module according to the present invention.

FIG. 2 is a side view showing a main configuration of FIG. 1;

FIG. 3 is a view for explaining the structure of an optical element module applied to an embodiment of the present invention.

FIG. 4 is a flowchart illustrating an optical element module assembly according to the embodiment of FIG. 1;

FIG. 5 is a view for explaining the steps of an embodiment of an optical fiber optical axis adjusting method according to the present invention.

FIG. 6 is a view for explaining the steps of an embodiment of an optical fiber optical axis adjusting method according to the present invention.

FIG. 7 is a view for explaining the steps of an embodiment of an optical fiber optical axis adjusting method according to the present invention.

FIG. 8 is a view for explaining the steps of an embodiment of an optical fiber optical axis adjusting method according to the present invention.

FIG. 9 is a diagram showing a configuration of a part of still another embodiment of the optical device module assembling apparatus according to the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Operation panel, 2 ... YAG laser welding emission optical part, 3 ... Infrared imaging tube camera, 4 ... YAG laser oscillator, 5 ... Fiber bundle positioning mechanism part, 6 ... Optical axis adjustment stage, 7 ... … Isolator adjustment stage, 8 ……
Optical fiber adjustment stage, 10 Laser diode (LD), 11 First lens, 12 Isolator, 13 Second lens, 14 Optical fiber, 15
... Stem, 16 ... Package, 18 ... Lens holder, 19 ... Fiber holder, 20 ... Fiber bundle, 2
DESCRIPTION OF SYMBOLS 1 ... Optical element module, 30 ... Base, 31 ... Optical axis adjustment XY (theta) moving part, 32 ... Package fixing mechanism, 3
3. Power meter, 34 Fiber XY moving part,
35: Fiber bundle vertical moving unit, 36: Fiber bundle gripping mechanism, 37: Isolator XY moving unit, 38: Isolator vertical moving unit, 39: Isolator gripping mechanism, 40: Optical fiber, fiber holder XY movement Part 41: Second lens vertical moving part, 42: Fiber holder gripping mechanism, 43: Optical fiber vertical moving part, 44:
Optical fiber gripping mechanism, 45... YAG laser welding emission optical part vertical movement part, 46... YAG laser welding emission optical part longitudinal movement part, 47... Power detection adjustment control part, 48.
Camera imaging detection adjustment control unit, 49... Overall control unit, 50
... Photodetector, 90... Alternative light source, 91.
2 ... Camera, 93 ... Motor, 94 ... Control device

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Hiroshi Matahira 216 Totsukacho, Totsuka-ku, Yokohama-shi, Kanagawa Prefecture Inside the Hitachi, Ltd.Communications Division (72) Inventor Minoru Kawabata 216 Totsukacho, Totsuka-ku, Yokohama-shi, Kanagawa Prefecture Hitachi, Ltd. Communications Division (72) Inventor Toshiyuki Ogawara 216 Totsuka-cho, Totsuka-ku, Yokohama-shi, Kanagawa Prefecture F-term (Reference) 2H037 AA01 BA03 DA03 DA04 DA05 DA06 DA16 DA23 DA36

Claims (5)

[Claims] An apparatus for manufacturing an optical element module by assembling a laser diode (hereinafter abbreviated as LD), an optical fiber, and a lens with an optical axis, wherein the optical axis adjusts the optical fiber and the lens. An imaging unit that obtains an image output of an output beam of the lens in the vicinity of the optical axis of the LD and the lens at a position away from the optical axis while changing the position of the image, and A processing device for calculating position data from the image obtained by the imaging means; a positioning means for positioning the optical fiber using the position data; and an optical output for measuring an output of the optical fiber when adjusting the positioning means. An assembling apparatus for an optical element module, comprising: a measuring device. 2. An apparatus for assembling an optical element module according to claim 1, wherein said imaging means moves a fiber bundle for transmitting an optical image and one end of said fiber bundle near an optical axis of said lens to an arbitrary position. A device for assembling an optical element module, comprising: a moving mechanism for stopping; and an image display device for capturing an image transmitted to the other end of the fiber bundle. 3. An optical fiber optical axis adjusting device according to claim 1, wherein said image pickup means receives a light receiving plate for visualizing the laser light condensed by said lens, and an image pickup means for picking up an image of said L light receiving plate. A control device for moving the position of the light receiving plate in conjunction with the imaging means. 4. A method for producing an optical element module by assembling a laser diode (hereinafter abbreviated as LD), an optical fiber and a lens by adjusting an optical axis thereof, wherein the LD is made to emit light, and a light beam emitted from the lens is produced. Observing the light beam image at a position distant from the image position while changing the position of the image, detecting position data when the light beam converges, and using the position data to A method for adjusting an optical axis of an optical fiber, comprising a step of controlling a position of an optical fiber holding device for assembling the optical fiber. 5. The method according to claim 4, wherein the step of observing the image of the light beam at a position away from the image position while changing the position of the image of the light beam emitted from the lens, An optical fiber optical axis adjusting method, comprising moving one end of an optical fiber bundle near a position where the light beam converges, and observing an image of the light beam at the other end of the optical fiber bundle.