JP2009271457A - Method for manufacturing optical element module - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for manufacturing an optical element module which contributes to improvement in the optical coupling efficiency. <P>SOLUTION: An optical element module packaging part 26, an optical element module lens part 27, a microscope and a centering device 21 are prepared for the method of manufacturing the optical element module 22. In first process step, the center of the light-receiving/emitting part 28 of the optical element module packaging part 26 held by a stationary table part 25 is arranged at the center of a field of view obtained, in a state where the optical element module lens part 27 and a barrel part 23 with a built-in aberration correcting lens do not exist. In second process step, the barrel part 23 with the built-in aberration correcting lens is attached to the microscope barrel part 24, thereafter, the optical element module lens part 27 is moved by a centering mechanism part 58 so as to make alignment between the center of the light-receiving/emitting part 28 and the center of the lens 29 with the aberration. At third process step, the optical element module lens part 27 is fixed to the optical element module packaging part 26, while maintaining the alingnment state. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a method for manufacturing an optical element module using an element / lens alignment apparatus.

  As a conventional optical element module, for example, one disclosed in Patent Document 1 below is known. In FIG. 8, the optical element module 1 includes a light emitting device 2 and a housing 3. The optical element module 1 shown in FIG. 8 is configured to perform a function on the light emitting side in optical communication. The light emitting device 2 includes a substrate 4, a light emitting element 5 and an electronic component 6 mounted on the front surface of the substrate 4, and a sealing resin 7 that seals the light emitting element 5 and the electronic component 6. . The housing 3 has a main body portion 8 and a cylindrical body portion 9 for inserting an optical fiber integrated with the main body portion 8 and is formed in a shape as shown in the figure.

  A plurality of locking recesses 10 are formed in the rear portion of the substrate 4 of the light emitting device 2. A locking hook portion 11 formed on the main body portion 8 of the housing 3 is hooked on the concave portion 10. The light emitting device 2 is accommodated in a state in which the light emitting device 2 is in contact with the step portion 12 inside the main body portion 8. At this time, the recesses 10 and the hook portions 11 are prevented from falling off by fitting and locking.

In the above configuration, when the light-emitting device 2 is fitted and locked to the main body portion 8, the light-emitting element 5 is transmitted through the sealing resin 7 from the front end opening of the cylindrical body portion 9 of the housing 3. It comes to face. When the optical fiber terminal is inserted into the cylindrical body portion 9, the inserted optical fiber terminal is opposed to the light emitting element 5. Although not particularly illustrated, a ferrule having an outer diameter matching the inner diameter of the cylindrical body portion 9 is attached to the optical fiber terminal.
JP 2006-30813 A

  In the above prior art, since the ferrule attached to the optical fiber terminal is structured to be inserted into the cylindrical body portion 9, the inner diameter of the cylindrical body portion 9 is slightly larger than the outer diameter of the ferrule. The dimensions are set so that Therefore, the ferrule may be misaligned in the direction of the arrow P in FIG. 8 by an amount corresponding to the dimensional difference with the cylindrical body portion 9. As a result, for the optical fiber exposed on the end face of the ferrule, There is a problem that the optical signal from the light emitting element 5 cannot be sufficiently combined (including an element that reduces the coupling efficiency). In addition, for example, when the insertion amount of the ferrule with respect to the cylindrical body portion 9 is small (the insertion in the arrow Q direction in FIG. 8 is shallow), or when the fitting and locking state of the light emitting device 2 and the hook portion 11 is poor ( (The light emitting device 2 is loose in the directions of arrows P and Q) has a problem that the optical signal from the light emitting element 5 cannot be sufficiently combined.

  In recent years, there has been an increase in the amount of information transmission and the need for real-time processing, and it is strongly desired to increase the transmission speed of optical signals. In order to increase the speed, it is possible to reduce the light receiving area of the optical fiber, but it has the following problems. That is, when the light receiving area of the optical fiber is reduced, the optical element module 1 having a large optical loss has a problem that it may not be possible to cope with the increase in speed.

  The inventor of the present application believes that the above problem can be solved by including a lens capable of increasing the optical coupling efficiency in the configuration of the optical element module. The lens is not a simple lens but a lens capable of giving a desired aberration between the light emitting element or the light receiving element and the optical fiber terminal. The inventor of the present application has found that by providing aberration to the lens, high coupling efficiency can be ensured even if the position of the light emitting element or light receiving element and the optical fiber terminal is slightly shifted. Further, the inventor of the present application has found that high coupling efficiency can be ensured even when the position of the optical fiber terminal is moved closer to or away from the lens.

  By the way, in an optical element module including a lens having aberration, the focal point is not a single point by the lens having aberration, but a circle having a certain area. In the manufacturing process of the optical element module, even if it tries to see the light emitting element or the light receiving element through the lens having an aberration, it will be blurred. Therefore, it becomes difficult in manufacturing to align the center of the lens with aberration with the center of the light emitting element or the light receiving element with high accuracy, which becomes a problem.

  Matching the center of the lens with aberration and the center of the light emitting element or light receiving element with high accuracy is important for improving the optical coupling efficiency between the optical fiber terminal and the light emitting element or light receiving element.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a method for manufacturing an optical element module that contributes to an improvement in optical coupling efficiency between an optical fiber terminal and a light emitting element or a light receiving element.

  The optical element module manufacturing method of the present invention according to claim 1, which has been made to solve the above-described problems, includes a light emitting element or a light receiving element, and a housing that houses the light emitting element or the light receiving element. A module package part and an optical element module lens part having a lens having an aberration interposed between the light emitting element or the light receiving element and an optical fiber terminal and fixed to the opening of the housing are prepared. In addition, an aberration correction lens built-in cylinder part that incorporates an aberration correction lens that corrects aberrations of the lens having the aberration, a microscope cylinder part or an imaging device to which the aberration correction lens built-in cylinder part is attached, A fixed base part that holds the optical element module package part in an immovable manner, and the optical element module lens that is held between the aberration correcting lens-containing cylinder part and the fixed base part And an alignment mechanism unit that moves the unit in this holding state. In the first step, in the first step, the light emitting element or the light receiving unit of the optical element module package unit held on the fixed base unit The center of the element is arranged at the center of the field of view obtained in the state where the optical element module lens part and the aberration correcting lens-containing cylinder part do not exist, and in the second step, the aberration correcting lens-containing cylinder part is A lens barrel attached to a microscope body or the imaging device, and then moving the optical element module lens part using the alignment mechanism part and the center of the light emitting element or the light receiving element and the lens having the aberration. Alignment with the center or the center of the cylindrical part integrated with the lens having the aberration is performed, and in the third step, the alignment state is maintained while maintaining the alignment state. An optical element module lens unit is characterized in that fixed to the housing.

  According to the present invention having such characteristics, the image of the light emitting element or the light receiving element viewed through the lens with aberration is corrected by the aberration correcting lens and becomes clear. In the present invention, since alignment is performed directly based on a clear image of the light emitting element or the light receiving element, an optical element module with high alignment accuracy can be manufactured.

  According to the present invention, the position specifying accuracy is improved, and high-precision positioning is possible without using active alignment.

  According to a second aspect of the present invention, there is provided an optical element module manufacturing method according to the first aspect, wherein one or a plurality of the aberration correction lenses are used.

  According to the present invention having such a feature, a clear image can be obtained by adjusting the shape and the number of aberration correction lenses, for example, even a lens having a large aberration.

  According to the first aspect of the present invention, since the element and the lens are directly aligned based on a clear image of the light emitting element or the light receiving element, an optical element module with high alignment accuracy is manufactured. Can do. Therefore, according to the present invention, it is possible to provide an optical element module manufacturing method that contributes to an improvement in optical coupling efficiency between the optical fiber terminal and the light emitting element or the light receiving element.

  According to the second aspect of the present invention, by adjusting the number of aberration correcting lenses, it is possible to cope with a lens having a large aberration. The present invention has an effect that it can be employed in the manufacture of various optical element modules.

  Hereinafter, description will be given with reference to the drawings. FIG. 1 is a diagram showing an embodiment of a method of manufacturing an optical element module according to the present invention. FIG. 1A is a schematic configuration of a microscope and alignment device as an element / lens alignment apparatus, and an optical element module. FIG. 4B is a flowchart of the manufacturing process of the optical element module, and FIG. 4C is a configuration diagram showing another example of the element / lens alignment apparatus.

  In FIG. 1A, reference numeral 21 indicates a microscope and alignment device corresponding to the element / lens alignment apparatus of the present invention. This microscope and aligning device 21 is a device used in the manufacturing process of the optical element module 22, and includes an aberration correcting lens built-in cylindrical portion 23, a microscope cylindrical portion 24, a fixed base portion 25, and an aligning mechanism portion. 58 (for example, a centering stage). The microscope and aligning device 21 is used for alignment when the optical element module lens unit 27 is fixed to the optical element module package unit 26 constituting the optical element module 22. The optical element module lens unit 27 includes a lens 29 having an aberration at a position facing a light emitting / receiving unit (light emitting element or light receiving element) 28 in the optical element module package unit 26.

  The aberration correcting lens built-in cylinder portion 23 has one or a plurality of aberration correcting lenses 30. The aberration correcting lens built-in cylinder part 23 is formed so as to be attached to the end of the microscope cylinder part 24. The lens section 23 with a built-in aberration correction lens is disposed so as to face the lens 29 attached to the microscope body section 24 and having the aberration of the optical element module lens section 27 with a gap. The microscope and aligning device 21 can move the aberration correcting lens built-in cylinder part 23 and the microscope cylinder part 24 closer to or away from the lens 29 having an aberration. The aberration correcting lens 30 is formed so as to correct the aberration of the lens 29 having an aberration.

  The fixed base part 25 is formed so that the optical element module package part 26 can be held immovably. The alignment mechanism unit 58 moves the optical element module lens unit 27 held between the aberration correcting lens built-in cylindrical body unit 23 and the fixed base unit 25 in this holding state (at least moves in the left-right direction in FIG. 1). It is comprised so that it can be made to.

  The image of the light emitting / receiving unit 28 is formed at a focal point 31 through a lens 29 having an aberration. The lens 29 with aberration in this embodiment has a large aberration, and the image of the light emitting / receiving unit 28 formed at the focal point 31 is in a state where it is blurred and the shape is not known. Therefore, in this state, even if an attempt is made to look at the light emitting / receiving unit 28 through the lens 29 having an aberration, it cannot be accurately confirmed.

  The microscope and aligning device 21 includes the aberration correction lens 30, so that the light receiving / emitting unit 28 of the optical element module package unit 26 is provided even if the optical element module lens unit 27 includes the lens 29 having an aberration. It can be confirmed accurately. This is because, even if the optical element module lens unit 27 has a lens 29 with an aberration, a blurred image is corrected by the aberration correction lens 30 and becomes a focus through the aberration correction lens 30. This is because a clear image is formed at the focal point 32 on the part 24 side.

  If a blurred image is clearly formed at the focal point 32 on the microscope cylindrical body 24 side, the alignment between the center position of the light emitting / receiving section 28 and the center position of the lens 29 having aberration is highly accurate. Thus, after the optical element module 22 is manufactured, the optical coupling efficiency between the optical fiber terminal (not shown) and the light emitting / receiving unit 28 can be improved. The center position of the lens 29 having an aberration can be specified at the center of a circle represented by the lens outer periphery or the reflected light of the coaxial incident illumination of the microscope.

  The optical element module 22 is manufactured through a process as shown in FIG. That is, the manufacturing method of the optical element module 22 prepares the optical element module package part 26 and the optical element module lens part 27, and also prepares the microscope and the aligning device 21 having the above-described configuration. The center of the light receiving / emitting part 28 of the optical element module package part 26 held on the fixed base part 25 is arranged at the center of the visual field obtained in the state where the optical element module lens part 27 and the aberration correcting lens built-in cylindrical body part 23 are not present. In the second step, the aberration correcting lens built-in cylinder part 23 is attached to the microscope cylinder part 24, and then the optical element module lens part 27 is moved using the alignment mechanism part 58, while the light receiving / emitting part 28 is moved. The center is aligned with the center of the lens 29 with aberration (or the center of a cylindrical portion to be described later). In the third step, the above alignment state is set. Fixed to the optical device module package portion 26 an optical device module lens portion 27 while lifting, which is the production method that.

  It is assumed that the aberration correcting lens built-in cylindrical portion 23, the microscope cylindrical portion 24, and the fixing base portion 25 of the microscope and aligning device 21 are free from unnecessary inclination and positional deviation. For example, a level or the like is used for checking the inclination. In addition, it is preferable that the movement of the optical element module lens unit 27 using the aligning mechanism 58 is a fine adjustment movement (the optical element module package unit 26 and the optical element module lens unit 27). It is preferable that a certain degree of positioning is performed by a structure (for example, a fine adjustment structure portion described later corresponds to this).

  In the above description, the element / lens aligning device is the microscope and aligning device 21. However, the present invention is not limited to this and may be configured as follows. That is, as shown in FIG. 1C instead of the microscope cylinder portion 24, an imaging device 59 to which the aberration correcting lens built-in cylinder portion 23 is attached, and an image processing apparatus 60 to which signals from the imaging device 59 are input. And a display device 61 for outputting a result processed by the image processing device 60. The imaging device 59 is, for example, a CCD camera, and the image processing apparatus 60 is provided with an arithmetic processing function, a control function, a storage function, and the like. The display device 61 is a display or the like.

  In addition to MTF (Modulated Transfer Function, which represents the contrast of an image with respect to spatial frequency) as an index indicating the aberration correction effect, the effect can also be confirmed by a lateral aberration diagram and Strehl intensity. Here, the implementation results will be described with reference to FIG. 7. The MTF (spatial frequency-contrast plot) without the aberration correction lens was 11% @ 50 cycles / mm (field diameter φ400 μm). With the aberration correction lens, it was 61% @ 50cycles / mm (the same field diameter) (30% @ 50cycles / mm is considered as one index for recognizing an image having a width of 10 μm).

  By improving the aberrations, the depth of field (lens aperture angle NA), magnification (lens NA), and field size (diaphragm size) can be set freely. The effect of increasing is obtained.

  Next, with reference to FIG. 2 to FIG. 6, each of the above-described configurations and manufacturing methods will be described using a more specific example. 2 is a cross-sectional view of the microscope and alignment device and the optical element module, FIG. 3 is a perspective view of the optical element module, FIG. 4 is an exploded perspective view of the optical element module, and FIG. 5 is a front view of the optical element module package part. 6 is a cross-sectional view of the optical element module during its manufacture.

  In FIG. 2, the microscope and aligning device 21 includes an aberration correcting lens built-in cylinder part 23, a microscope cylinder part 24, a fixed base part 25, and an aligning mechanism part 58 as described above. The optical element module 22 includes an optical element module package part 26 and an optical element module lens part 27. Since the optical element module 22 has the fine adjustment structure portion 33 in the drawing, the optical element module lens part 27 can be positioned to some extent in advance with respect to the optical element module package part 26.

  The aberration correcting lens built-in cylinder part 23 has a hollow outer cylinder part 34 that forms a circular outer periphery. Three aberration correction lenses 30 are provided in the outer cylinder portion 34 at a predetermined interval. The three aberration correcting lenses 30 are for correcting the aberration of the lens 29 having an aberration, and the predetermined interval is maintained by the spacer 35 provided on the inner surface of the outer cylindrical portion 34. It has become.

  The aberration correcting lens built-in cylinder part 23 can be attached to the end of the microscope cylinder part 24 by screwing the outer cylinder part 34 or by using an attachment. The lens section 23 with a built-in aberration correction lens is disposed so as to face the lens 29 attached to the microscope body section 24 and having the aberration of the optical element module lens section 27 with a gap.

  The aberration correction lens 30 is made of a transparent synthetic resin material having light permeability or glass. The aberration correction lens 30 includes a material refractive index of a portion through which light is transmitted, a positional relationship of each member, a shape of the lens 29 having an aberration of the optical element module lens unit 27, a used wavelength, a required field of view, and a microscope tube. It is designed based on the NA of the microscope objective lens 36 of the body 24. The aberration correcting lens 30 is designed so that a sufficiently clear image can be obtained at the time of alignment.

  The microscope cylinder portion 24 is arranged in accordance with the position of the focal point 32 (see FIG. 1) through the three aberration correction lenses 30. The microscope barrel portion 24 is provided with a microscope objective lens 36 therein. The microscope objective lens 36 is disposed so as to face the aberration correction lens 30.

  The fixed base part 25 is formed so that the optical element module package part 26 can be held immovably. In this embodiment, a concave portion 37 is formed in accordance with the shape of the optical element module package portion 26.

  The alignment mechanism unit 58 holds the optical element module lens unit 27 which is previously positioned to some extent with respect to the optical element module package unit 26, and can finely adjust the position of the optical element module lens unit 27. It is configured.

  2 to 6, the optical element module package portion 26 of the optical element module 22 includes a light emitting / receiving section 28 (light emitting element or light receiving element), a conductive metallic lead frame 38, and an insulating composite. A resin casing 39, a silicone resin sealing portion 40, an IC 41 and an electronic component 42 are provided. The optical element module lens portion 27 of the optical element module 22 includes a cylindrical portion 43 into which an optical fiber terminal (not shown) is inserted, and a lens 29 having an aberration interposed between the light emitting / receiving portion 28 and the optical fiber terminal. The lid portion 45 is fixed to the opening portion 44 of the housing 39. The optical element module lens portion 27 is molded from a transparent synthetic resin material having light permeability (in this embodiment, the respective portions are molded and integrated together, but the present invention is not limited to this. For example, the lens 29 having an aberration may be separately formed, for example, by insert molding).

  The light emitting / receiving unit 28 is mounted on the lead frame 38 together with the IC 41 and the electronic component 42. For example, when the light emitting / receiving unit 28 is a light emitting element, an optical signal output from the light emitting element is generated by converting an electrical signal. As a light emitting element, LED and VCSEL are generally known. Here, a VCSEL is used to increase the transmission speed. On the other hand, in the case of a light receiving element, PD is generally known. The light emitting / receiving unit 28 is mounted on a small substrate 46 provided on the lead frame 38.

  The lead frame 38 is formed into a shape as shown in the figure by processing a conductive metal thin plate. The lead frame 38 is not separated from the carrier formed by the above-described processing until insert molding described later or mounting of the light emitting / receiving unit 28 and the like is performed.

  In the lead frame 38, for example, a through hole 47 is formed on the central axis. The through hole 47 is formed so as to penetrate the lead frame 38 with a diameter slightly larger than the diameter of an ejector pin described later. In the vicinity of the through hole 47, an element mounting portion 48 for the light emitting / receiving portion 28 is set. The element mounting portion 48 is set by the size of the substrate 46. An IC 41 and an electronic component 42 are mounted in the vicinity of the element mounting portion 48.

  The casing 39 is formed by resin molding in which the lead frame 38 is inserted into a predetermined position. The casing 39 is formed in a shape that is open at the front, rectangular, and shallow. Specifically, the bottom wall 49, the upper wall 50, the lower wall 51, the left side wall 52, the right side wall 53, and the opening 44 are formed. The opening 44 is formed as a portion opened by each end of the upper wall 50, the lower wall 51, the left side wall 52, and the right side wall 53. Each end part of the upper wall 50, the lower wall 51, the left side wall 52, and the right side wall 53 is formed so as to be continuous on a flat surface. A concave portion 54 is formed on such a flat surface.

  The concave portion 54 is a groove-shaped portion, and is formed to have a rectangular shape when the housing 39 is viewed from the front as shown in FIG. The recess 54 is formed outside the opening 44. The concave portion 54 is formed as a part of the fine adjustment structure portion 33 (see FIG. 2) that becomes the non-locking uneven portion on the housing 39 side. The cross-sectional shape of the recess 54 is not limited to a rectangle or a square, but may be a V shape or a U shape. The shape of the recess 54 is such that the optical element module lens unit 27 is finely moved for alignment in a state where a non-locking uneven part (fine adjustment structure part 33) to be described later on the optical element module lens unit 27 side is inserted. The shape is not particularly limited as long as it can be formed. In the manufacture of the optical element module 22, a fixing adhesive is applied to the recess 54.

  The casing 39 has a marker 55 that serves as a positioning reference in mounting the light emitting / receiving unit 28. The marker 55 is formed on the bottom wall 49 when the lead frame 38 is insert-molded at a predetermined position. Specifically, the marker 55 is formed when the casing 39 is resin-molded. That is, the marker 55 is formed using the mark of the ejector pin of the molding die. The marker 55 is formed at a position facing the through hole 47 of the lead frame 38. The marker 55 is formed by passing an ejector pin of a molding die through the through hole 47 of the lead frame 38 during resin molding of the housing 39.

  The lid 45 in the optical element module lens unit 27 is formed in a rectangular shape that can cover the opening 44 of the housing 39. The lid 45 has a convex portion to be fixed by an adhesive at a position of a flat surface at each end of the upper wall 50, the lower wall 51, the left side wall 52, and the right side wall 53 of the housing 39. 56 is formed. The convex portion 56 is formed as a part of the fine adjustment structure portion 33 (see FIG. 2) that becomes the non-locking uneven portion on the lid portion 45 side. The convex portion 56 is formed in accordance with the shape and arrangement of the concave portion 54 of the housing 39.

  In addition, the convex part 56 may be formed in the housing | casing 39 side, and the recessed part 54 shall be formed in the cover part 45 side. The convex portion 56 and the concave portion 54 are formed in a shape that can be inserted and are not caught by each other (the optical element module lens portion 27 and the housing 39 are formed by the convex portion 56 and the concave portion 54. (It is assumed that the structure is not an adhesive or an adhesive or equivalent). The dimensions of the convex portion 56 and the concave portion 54 are set so that an extremely small backlash (a backlash necessary for positioning) is generated in a state where they are inserted.

  The cylindrical portion 43 is formed as a portion into which the end of the optical fiber is inserted through the ferrule or a portion into which the end of the optical fiber is directly inserted when the optical element module 22 is used. The cylinder part 43 is formed in a cylindrical shape. Inside the cylindrical portion 43, a lens 29 having an aberration is integrally formed (it may be a separate body). The lens 29 having an aberration is arranged and formed in the vicinity of a continuous portion between the cylindrical portion 43 and the lid portion 45. The cylindrical portion 43 is formed so that this center and the center of the lens 29 having an aberration coincide with each other.

  The lens 29 with aberration is disposed and formed so as to be interposed between the end of the optical fiber and the light emitting / receiving unit 28 when the optical element module 22 is used. The lens 29 having an aberration is arranged in consideration of the distance between the end of the optical fiber and the light emitting / receiving unit 28. The lens 29 with aberration is formed so as to be convex on the end side of the optical fiber and on the side of the light emitting / receiving unit 28, respectively. The lens 29 having an aberration is formed so that each convex surface is an aspherical surface. As shown in FIG. 2, an aberration correction lens 30 is opposed to the lens 29 having such aberration.

  As the optical fiber, POF and PCF are generally known. Here, PCF is used to increase the transmission speed.

  The lens 29 with aberration will be described in more detail. The lens 29 with aberration has a first aspherical convex lens portion 29a that is convex on the light emitting / receiving portion 28 side and formed aspherical, and on the optical fiber terminal side. Formed to have a second aspherical convex lens portion 29b that is convex and formed into an aspherical surface, and a solid intermediate portion 29c that is continuous between the first aspherical convex lens portion 29a and the second aspherical convex lens portion 29b. Has been. In addition, the lens 29 having an aberration is formed such that the shapes of the first aspherical convex lens portion 29a and the second aspherical convex lens portion 29b are asymmetrical.

  With respect to the asymmetric shape, when the lens diameter is the same, the second aspherical convex lens portion 29b is formed to be thicker than the first aspherical convex lens portion 29a. In addition, the asymmetric shape is formed such that light propagating through the solid intermediate portion 29c spreads in the propagation direction (in the case of a light receiving element, it is narrowed).

  The lens 29 with aberration is formed in the shape as described above so that a desired aberration can be generated between the light emitting / receiving unit 28 and the optical fiber terminal. The lens 29 having the aberration is formed in the shape as described above so as to have the aberration so that a high coupling efficiency can be ensured even if the position of the light emitting / receiving unit 28 and the optical fiber terminal is slightly shifted. It has become. That is, by providing aberration, the focal point 31 (see FIG. 1) at the focal point position does not become one point, but a circle having a certain area can be obtained, thereby ensuring high coupling efficiency. It has become.

  In addition, the lens 29 with aberration is formed in the shape as described above, so that even if the position of the optical fiber terminal is close to or away from the lens 29 with aberration, the lens 29 is not coupled. A sufficient spot diameter can be obtained. That is, also in this case, high coupling efficiency is ensured.

  4 to 6, the silicone resin sealing portion 40 is formed in a state as illustrated by potting a sealing silicone resin with respect to the housing 39. The light emitting / receiving unit 28, the IC 41, and the electronic component 42 mounted on the lead frame 38 are protected by the silicone resin sealing unit 40. The silicone resin sealing portion 40 is formed so that the top surface is slightly lower than the opening 44.

  Next, the manufacture of the optical element module 22 will be described based on the above configuration.

  First, the lead frame 38 with the carrier attached (the lead frame 38 will be scattered if the carrier is not attached) is set in the molding die. Next, when resin molding of the housing 39 is started in this state, the housing 39 is formed with a part of the lead frame 38 being insert-molded. At this time, a positioning marker 55 is formed on the casing 39 using the marks of the ejector pins of the molding die (see FIG. 5). Since the ejector pin is arranged on the mold body with the dimensional accuracy of the molding die, the marker 55 is arranged and formed with high accuracy by such an ejector pin.

  In forming the marker 55, the ejector pin penetrates the through hole 47 of the lead frame 38. Therefore, when the housing 39 is molded while the lead frame 38 is inserted, the lead frame 38 is moved by the resin flow. It is prevented from moving. Therefore, the positioning of the lead frame 38 is completed with high accuracy simultaneously with the molding of the housing 39.

  When the opening 44 is exposed after the housing 39 is resin-molded, a part of the lead frame 38 is exposed. Subsequently, an operation of mounting and wiring the light emitting / receiving unit 28, the IC 41, and the electronic component 42 on the exposed portion is performed. For mounting the light emitting / receiving unit 28 and the like, the marker 55 is used as a positioning reference. By using the marker 55 as a positioning reference, the light emitting / receiving unit 28 is arranged with high accuracy with respect to the lead frame 38 and the housing 39.

  Subsequently, a potting silicone resin is potted on the casing 39. With this operation, the silicone resin sealing portion 40 is formed in the housing 39. The light emitting / receiving unit 28, the IC 41, and the electronic component 42 mounted on the lead frame 38 are protected by the silicone resin sealing unit 40. When the light emitting / receiving unit 28, the IC 41, and the electronic component 42 are protected by the silicone resin sealing unit 40, and the lead frame 38 is separated from the carrier, the optical element module package unit 26 is formed as shown in FIGS. The

  Subsequently, the pre-molded optical element module lens portion 27 is fixed to the housing 39 of the optical element module package portion 26 using an adhesive. This operation is performed using a microscope and aligning device 21 (see FIGS. 1 and 2). In the operation of fixing the optical element module lens unit 27 to the housing 39, an adhesive is applied to the concave portion 54 of the housing 39, the convex portion 56 of the lid portion 45 is inserted, and the light emitting / receiving unit 28 is positioned. A temporary fixing operation for determining the fixing position of the optical element module lens unit 27 while using as a reference, and a main fixing operation for completely fixing the optical element module lens unit 27 to the housing 39 by curing the adhesive applied to the concave portion 54. Divided. The microscope and aligning device 21 are mainly used in the former temporary fixing work.

  The temporary fixing operation using the microscope and the aligning device 21 is an operation through the first step to the third step in order. In the first step, the optical element module package unit 26 held by the fixing base unit 25 is received. The center of the light emitting unit 28 is arranged at the center of the field of view obtained in the state where the optical element module lens unit 27 and the aberration correcting lens built-in cylinder unit 23 are not present. In the second step, the aberration correcting lens built-in cylinder part 23 is attached to the microscope cylinder part 24, and thereafter, the optical element module lens part 27 is moved using the alignment mechanism part 58 and the center of the light receiving / emitting part 28 is set. Alignment with the center of the lens 29 having the aberration (or the center of the cylindrical portion 43) is performed. In the third step, the optical element module lens unit 27 is temporarily fixed to the optical element module package unit 26 while maintaining the above alignment state. The temporary fixing in the present embodiment is not particularly limited, but a liquid UV curable adhesive (for example, a cyanoacrylate-based instantaneous adhesive having a UV adhesive function) is applied to the concave portion 54 of the casing 39 and the convex portion of the lid portion 45. It is performed by dropping onto the fitting portion with the portion 56 and then irradiating with UV light.

  In this embodiment, a thermosetting epoxy adhesive is used as the adhesive applied to the recess 54 of the casing 39 (assumed to be an example). The adhesive is applied to, for example, the recesses 54 at the positions of the upper wall 50 and the lower wall 51 of the casing 39 (the positions of the left side wall 52 and the right side wall 53 are portions where the liquid UV curing adhesive is dropped). When the heat fixing (for example, 1 Hr at 100 ° C.) is applied and cured after the temporary fixing operation, the optical element module lens unit 27 is completely fixed to the housing 39. When the thermosetting epoxy adhesive is cured, the optical element module lens unit 27 matches the center of the light emitting / receiving unit 28 with the center of the lens 29 with aberration (or the center of the tube unit 43) with high accuracy. It is fixed in the state. When the thermosetting epoxy adhesive is cured and the optical element module lens unit 27 is completely fixed to the housing 39, the manufacture of the optical element module 22 is completed.

  In the temporary fixing operation using the microscope and aligning device 21, the image of the light emitting / receiving unit 28 viewed through the lens 29 having an aberration is corrected by the aberration correcting lens 30 to become a clear image. By directly aligning the optical element module lens unit 27 based on the clear image of the light emitting and receiving unit 28, the optical element module 22 with high alignment accuracy is manufactured.

  It goes without saying that the present invention can be variously modified without departing from the spirit of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows one Embodiment of the manufacturing method of the optical element module of this invention, (a) is a typical block diagram of the microscope and alignment apparatus as an element and lens aligning apparatus, and an optical element module, (b) is a flowchart of the manufacturing process of an optical element module, (c) is a block diagram which shows the other example of an element and lens aligning apparatus. It is sectional drawing of a microscope, an alignment apparatus, and an optical element module. It is a perspective view of an optical element module. It is a disassembled perspective view of an optical element module. It is a front view of an optical element module package part. It is sectional drawing in the middle of manufacture of an optical element module. It is a graph which concerns on the change of MTF. It is sectional drawing of the optical element module of a prior art example.

Explanation of symbols

21 Microscope and alignment device (element / lens alignment device)
DESCRIPTION OF SYMBOLS 22 Optical element module 23 Aberration correction lens built-in cylinder part 24 Microscope cylinder part 25 Fixing base part 26 Optical element module package part 27 Optical element module lens part 28 Light receiving / emitting part (light emitting element or light receiving element)
DESCRIPTION OF SYMBOLS 29 Lens which gave aberration 29a 1st aspherical convex lens part 29b 2nd aspherical convex lens part 29c Solid intermediate part 30 Aberration correction lens 31, 32 Focus 33 Fine adjustment structure part 34 Outer cylinder part 35 Spacer 36 Microscope objective lens 37 Concave part 38 Lead frame 39 Case 40 Silicone resin sealing part 41 IC
42 Electronic Component 43 Tube 44 Opening 45 Lid 46 Substrate 47 Through Hole 48 Device Mounting Portion 49 Bottom Wall 50 Top Wall 51 Bottom Wall 52 Left Side Wall 53 Right Side Wall 54 Recessed 55 Marker 56 Protruding 57 Light 58 Centering Mechanism 59 Imaging device 60 Image processing device 61 Display device

Claims (2)

An optical element module package unit including a light emitting element or a light receiving element, and a housing for housing the light emitting element or the light receiving element, and an aberration interposed between the light emitting element or the light receiving element and the optical fiber terminal And having an optical element module lens unit fixed to the opening of the housing having a lens
An aberration-correcting lens built-in cylinder part that incorporates an aberration-correcting lens that corrects aberration of the lens having the aberration, a microscope cylinder part or an imaging device to which the aberration-correcting lens built-in cylinder part is attached, and the optical element A fixing base part that holds the module package part immovably, and an alignment that moves the optical element module lens part held between the aberration correcting lens-containing cylinder body part and the fixing base part in this holding state. Prepare an element / lens alignment device comprising a mechanism,
In the first step, the center of the light-emitting element or the light-receiving element of the optical element module package part held on the fixed base part is in a state where the optical element module lens part and the aberration correcting lens built-in cylindrical body part do not exist. Placed in the center of the resulting field of view,
In the second step, the aberration correcting lens built-in cylinder part is attached to the microscope cylinder part or the imaging device, and then the light emitting module is moved while moving the optical element module lens part using the alignment mechanism part. Perform alignment between the center of the element or the light receiving element and the center of the lens having the aberration or the center of the cylindrical portion in which the lens having the aberration is integrated,
In the third step, the optical element module lens unit is fixed to the casing while maintaining the alignment state. A method of manufacturing an optical element module, comprising: In the manufacturing method of the optical element module of Claim 1,
One or a plurality of the aberration correction lenses are used. A method of manufacturing an optical element module.

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