KR100666978B1 - Micro optics assembly and the assembly method - Google Patents

Abstract

The present invention relates to an optical component assembly and an assembly method for optical transmission. The optical transmission assembly includes a first collimator to which an optical signal is input; A second collimator installed at a predetermined interval from the first collimator to receive the optical signal; An optical filter installed between the first collimator and the second collimator to pass only light of a specific component among the optical signals input through the first collimator; The optical filter is built therein and integrated holders having one end of the first collimator and the second collimator inserted and fixed to both sides thereof, and light transmitting holes formed at both ends thereof. A housing housing the first collimator and the first collimator; A boot installed at both ends of the housing; A sealing material injected into the outside of the boot; It further comprises an end cap which is installed at both ends of the housing.

The configuration as described above has the advantage of shortening the process time by eliminating the conventional soldering process and minimizing the alignment deviation of each unit component due to the solder drift generated during soldering, and also fixing the optical filter. By improving the adhesive solution and the optical filter loading operation to simplify the automated process is possible, accordingly the optical filter assembly time is shortened to improve the yield, it has the effect of reducing the number of people.

Description

Optical component assembly and assembly method for optical transmission {MICRO OPTICS ASSEMBLY AND THE ASSEMBLY METHOD}

1 is a cross-sectional view showing the configuration of a conventional optical component for optical transmission;

2 is a partially enlarged perspective view illustrating a state in which the first lens 13 is inserted into the holder 33 of FIG. 1;

3 is a cross-sectional view taken along the line A-A 'of FIG.

4 is a view showing the configuration of an optical part for optical transmission according to an embodiment of the present invention;

5 is a perspective view showing an embodiment of the integrated holder 140 shown in FIG.

6 is a cross-sectional view taken along line B-B 'of FIG. 5;

7 is a perspective view showing another embodiment of the integrated holder 140 shown in FIGS. 4 to 6;

8 is a cross-sectional view taken along the line C-C 'of FIG.

9 is a view along arrow D of FIG. 7,

10 is a view along arrow E of FIG. 7,

11 is a view along arrow F of FIG. 7,

12A and 12B illustrate another example of the formation of the inclined surface 141c ′ illustrated in FIGS. 7 to 11.

13 is a flowchart illustrating a process of assembling an optical component assembly for optical transmission according to the present invention.

<Explanation of symbols for the main parts of the drawings>

110,120: 1st, 2nd collimator 111,121: 1st, 2nd optical fiber

113,123: 1st, 2nd lens 115,125: 1st, 2nd holder

117,127: first and second ferrule 130: optical filter

140,140 ′: Integrated holder 141a, 143a, 141d ′: Light transmitting hole

141a ': opening 141c': inclined surface

141h ′: Cross section of inclined plane S: Central axis in the longitudinal direction of integrated holder

163: housing 165: boot

167: end cap 169: sealing material

The present invention relates to an optical component assembly for optical transmission and its assembly method, and more particularly, to improve the structure of the holder for fixing each optical component and the fixing method thereof to shorten the process time and minimize the alignment deviation of each component. The present invention relates to an optical component assembly and an assembly method for optical transmission.

In general, the basic configuration of optical communication is a light source, a photodetector, and an optical transmission module, which were mainly developed around the 1970s.

The communication method by the optical fiber has advantages that are much superior to the wire communication by the coaxial cable. With a strand of fiber that is only tens of micrometers thick, it can transmit 12,000 lines of information, which not only significantly reduces the weight and volume of the cable to tens of tens, but also transmits vast amounts of information. That is the biggest advantage. In the case of optical cable, one every 30 ~ 100km is sufficient, so it is suitable for long distance transmission.

1 is a view showing a configuration of an optical component for a conventional optical transmission module of the configuration of the optical communication as described above.

As shown in the figure, a first collimator 10 into which an optical signal is input, a second collimator 20 installed at a predetermined interval with the first collimator 10 to receive the optical signal, and the first collimator It is composed of each unit component consisting of an optical filter means 30 which is installed between the 10 and the second collimator 20 to pass only the light of a specific component among the light incident through the first collimator 10 and In addition, the first collimator 10, the optical filter means 30, the second collimator 20 is located in the housing 41 for positioning and fixing the inside, and the outer case 43 to form an appearance.

The first collimator 10 includes a first holder 15 having a first lens 13 connected therein and connected to the first optical fiber 11, and the first optical fiber 11 includes a first ferrule ( 17) is fixed at a predetermined position.

The second collimator 20 includes a second holder 25 having a second lens 23 connected therein to be connected to the second optical fiber 21, and the second optical fiber 21 also includes a second ferrule ( 27) is fixed at a predetermined position.

The first and second ferrules 17 and 27 serve to align the first and second optical fibers 11 and 21.

The optical filter means 30 is composed of a filter holder 33 is built in the optical filter 31 for passing only the light of a specific component therein and returning the remaining light, one end of the filter holder 33 An end portion of the first lens 13 of the one collimator 20 is inserted and the bonding plate 35 is inserted into the other end side thereof.

As shown in FIGS. 2 and 3, the first lens 13 of the first collimator 10 is coated with an adhesive agent (E) such as epoxy on a plurality of side surfaces of the outer peripheral surface of the filter holder 33. It is inserted into the inside of the, and then the primary bonding is made by curing the bonding agent (E) by UV light irradiation, and then heat-cured by heat treatment in a high-temperature chamber again to form the secondary unit part 50 Done.

Since the filter holder 33 is made of stainless steel and does not transmit UV light, a light transmission hole 33a capable of transmitting the UV light is formed to cure the bonding agent E. do.

The assembly of a conventional optical transmission optical component configured as described above is first subjected to a unit component assembly process of assembling the first and second collimators 10 and 20 constituting each component and the optical filter means 30. .

Thereafter, the first collimator 10 and the optical filter means 30 are combined to form a second unit part 50, and the second unit part 50 and the second collimator 20 are separated by a predetermined interval. Then, the packaging operation is performed by placing the housing 41 on the outside thereof, and injecting and melting the solder by a soldering apparatus (not shown) into the housing 41.

The packaging operation as described above is for the purpose of sealing and fixing the first collimator 10 and the second collimator 20 coupled to the filter holder 33 to an appropriate position.

The optical component packaged as described above is configured to be rebuilt inside the outer case 43.

However, in the related art, as described above, the thermosetting process for forming the second unit part 50 acts as an intermittent process and requires a curing time of 8.5 hours before proceeding with the packaging process. There is a problem of lengthening.

In addition, as the combination of the second unit part 50 and the second collimator 20 is soldered through the housing 41, the alignment process is very complicated, and solder drift is performed during the soldering operation. There is a problem that (SOLDER DRIFT) is severe and position alignment is bad.

In addition, due to the asymmetric thermal expansion caused by the asymmetrical thermal expansion of the solder after the completion of the product has a large change in the loss value for the thermal contact has a structure that is unstable to the thermal contact, which also has a problem that the position alignment is poor.

In addition, conventionally, the output end side of the optical filter 31 has a structure that is bonded by the bonding plate 35 and the adhesive liquid, there is a problem that can lower the characteristic value of the optical filter 31 and the optical filter There is a problem that the process of joining the 31 to the filter holder 33 is cumbersome.

The present invention has been made to solve the above-mentioned problems, the first object of the present invention is to improve the fixing structure for fixing each unit part (first, second collimator and optical filter) to shorten the process time as well as realize automation It is an object of the present invention to provide an optical component assembly for optical transmission and a method for assembling the same, which can reduce personnel and improve yield.

A second object of the present invention is to provide an optical component assembly and assembly method for optical transmission which minimizes the alignment deviation of each unit component due to the solder drift generated during soldering, since the joining of the respective unit components is not caused by soldering.

It is a third object of the present invention to provide an optical component assembly and an assembly method for optical transmission that make it easier to assemble the optical filter means by improving the fixing structure for fixing the optical filter.

In order to achieve the above object, the present invention includes a first collimator to which an optical signal is input; A second collimator installed at a predetermined interval from the first collimator to receive the optical signal; An optical filter installed between the first collimator and the second collimator to pass only light of a specific component among the optical signals input through the first collimator; The optical filter is built therein, and ends of the first collimator and the second collimator are inserted and fixed to both sides thereof, and an integrated holder having light transmitting holes formed at both ends thereof.

In addition, the housing configured to accommodate the first and second collimator while accommodating the integrated holder therein; A boot installed at both ends of the housing; A sealing material injected into the outside of the boot; It further comprises an end cap which is installed at both ends of the housing.

The integrated holder is composed of one body or two bodies.

The integrated holder consisting of the one body forms a hollow cylindrical body of which both ends are open, an opening is provided on one side of the circumferential surface of the cylindrical body, and the opening and the extended inner bottom surface have a symmetrical shape to each other. A pair of inclined surfaces are formed so that the optical filter is inserted and seated, and both ends of the light transmitting holes are formed at predetermined intervals.

The integrated holder composed of the two bodies is formed by combining a hollow body having both ends open and a plurality of bodies having the light transmitting holes formed at a predetermined interval at one end thereof in a symmetrical form.

The boot is formed of a silicon material.

Next, assembling the first and second collimator of each unit component; Applying an adhesive solution to the interior of the integrated holder, and then curing the first by embedding an optical filter; Applying an adhesive solution to both ends of the integrated holder and inserting a part of the first and second collimators into the integrated holder to cure the primary; The optical holder assembly method comprising the step of thermosetting the integrated holder including the first and second collimator and the optical filter by a heat treatment apparatus.

In addition, the step of receiving the integrated holder and the first, second collimator inside the housing in the above-described step; Inserting a boot at both ends of the housing, and injecting a sealing material to the outside of the boot; And installing end caps at both ends of the housing.

The integrated holder forms an opening on the side of the body, forms a pair of inclined surfaces having a predetermined angle on a surface facing the opening, and applies an adhesive liquid to the inclined surface through the opening, and then the optical filter Loading from the side of the integrated holder through the opening makes it easier to apply the adhesive liquid and insert the optical filter means, and automation can be realized.

An intersection line where the pair of inclined surfaces intersect is formed to be parallel or at a predetermined angle with respect to the longitudinal central axis of the integrated holder.

Hereinafter, the configuration and operation of the present invention will be described with reference to the accompanying drawings, FIGS. 4 to 6.

4 is a view showing an optical transmission assembly for an optical component according to an embodiment of the present invention. As shown in the drawing, its basic components include a first collimator 110 to which an optical signal is input, and the first collimator ( The first collimator 110 is installed between the second collimator 120 and the first collimator 120 and the second collimator 120 to receive the optical signal. It consists of an optical filter 130 that passes only the light of a specific component of the optical signal input through.

The first collimator 110 includes a first holder 115 having a first lens 113 connected to the first optical fiber 111 therein, and the first optical fiber 111 has a first ferrule. It is fixed at a predetermined position by 117.

The second collimator 120 includes a second holder 125 having a second lens 123 connected therein and connected to the second optical fiber 121, and the second optical fiber 121 also includes a second ferrule ( 127) is fixed at a predetermined position.

The first and second collimators 110 and 120 and the optical filter 130 are fixed in an alignment by the integrated holder 140.

The integrated holder 140 serves to accommodate the optical filter 130 that has been performed by the filter holder 30 of the prior art (FIGS. 1 to 3), and at both ends of the integrated holder 140. By positioning and fixing the first and second collimators 110 and 120 at the same time to form a bare device 150, the conventional packaging process is solved.

Next, when the first and second collimators 110 and 120 and the optical filter 130 are coupled to each other by the integrated holder 140 to form a bare device 150, a housing () may be disposed outside the bare device 150. 163 is installed, a boot (BOOT) 165 is inserted into both ends of the housing 163, a sealing material 169 is injected into the outside of the boot 165, the end of both ends of the housing 163 The cap 167 is installed.

As the sealing material 169 replaces the conventional solder, the reproducible depth of sealing in the housing 163 when used as a sealing material becomes an important problem. As a result, the auxiliary body considering the reproducibility and the tension of the optical fibers 111 and 121 without touching each of the first and second collimators 110 and 120 is required.

Therefore, the boot 165 is to satisfy such a requirement, made of a silicon material, take the form of a cap so as to weakly surround the first and second collimators (110, 120) into the housing 163, and the shock absorbing and In addition to supporting the bare device 150, the sealing material 169 is prevented from flowing down.

Of course, the end cap 167 functions as an exterior, and for another use, the warpage of the first and second optical fibers 111 and 121 is smoothed so that the first and second optical fibers 111 and 121 are damaged or deteriorated. It plays a role in dissolving.

5 and 6 illustrate an example of the integrated holder 140, and are composed of a plurality of first and second bodies 141 and 143 coupled to each other in a symmetrical form as shown in the drawing.

Each of the first and second bodies 141 and 143 is open at both ends and forms a hollow state, and light transmission holes 141a and 143a are formed at respective ends at predetermined intervals, respectively. An end portion 143b is formed at one end of the first body 141 to be easily inserted into an inner circumferential surface of the first body 141.

The light transmission holes 141a and 143a are manufactured to transmit UV light, for example, for curing the adhesive liquid injected therein.

Next, FIGS. 7 to 11 are views illustrating a configuration of the integrated holder 140 'reproduced to have a different form from the integrated holder 140. As shown in FIG.

As shown in the figure consists of a single body (141 '), the body (141') has a cylindrical shape that is open at both ends and the inside of the hollow state, the circumference of the body (141 ') An opening 141a 'through which the optical filter 130 may be inserted is provided at one side of the surface, and the opening 141a' and the extended inner bottom surface have a pair of inclined surfaces 141c 'having symmetrical shapes. The light filter 130 is formed to be inserted and seated, and light transmission holes 141d 'are formed at both ends at predetermined intervals.

The plurality of inclined surfaces 141c 'are formed in a “V” shape so that the adhesive liquid coating and the optical filter 130 loading operation can be easily performed, and can easily lead to an automated process, thereby reducing the number of employees and the process. It is possible to shorten the time, and thus to improve the yield (yield) for a predetermined time.

The integrated holder 140 ′ configured as described above may solve the problem of deteriorating the characteristic value of the optical filter 130 by making the adhesive surface of the optical filter 130 at the bottom of the optical filter 130 instead of directly passing the light. It becomes possible.

In addition, since the integrated holder 140 'is composed of one body 141', it is possible to minimize the distortion of the shaft due to manufacturing tolerances that may occur when assembling the two bodies, thereby reducing the optical path deviation.

8 and 10, reference numeral 141e 'indicates holes required for processing to form portions where the inclined surfaces 141c' intersect.

7 to 11 illustrate an example in which an intersection line 141h 'formed by crossing the inclined surface 141c' is formed parallel to the central axis S in the longitudinal direction of the integrated holder 140.

In other words, the filter surface 130a of the optical filter 130 is perpendicular to the longitudinal central axis S of the integrated holder 140 when the optical filter 130 is seated.

However, the present invention is not limited thereto, and the intersection line 141h ′ is formed to be inclined at a predetermined angle with respect to the longitudinal central axis S of the integrated holder 140, as shown in FIGS. 12A to 12B. The filter surface 130a of the filter 130 can be installed to have a predetermined angle with respect to the central axis S, so that the adjustment can be appropriately made to the required optical path.

Next, a description will be given of the optical component assembly for optical transmission according to the present invention with reference to FIG.

First, the first collimator 110 and the second collimator 120 forming each unit component are assembled (S1), and the optical filter 130 is inserted into the integrated holder 140 or 140 'and installed (S2).

The installation process (S2), first, by applying an adhesive solution to the interior of the integrated holder (140 or 140 '), by placing the optical filter 130 on the adhesive liquid coating surface to irradiate UV light to the primary temporary curing, At this time, UV light is transmitted through the light transmission holes 141a, 143a or 141d 'formed at both ends of the integrated holder 140 or 140' to easily achieve the curing action.

As described above, after the optical filter 130 is built in the integrated holder 140 or 140 ′ (S2), the first lens 113 and the second lens of the first collimator 110 and the second collimator 120 are formed. The adhesive solution is applied around the periphery of 123 or the adhesive solution is applied to the inner circumferential surfaces of both ends of the integrated holder 140 or 140 'and then the first and second collimators 110 and 1120 are transferred to the integrated holder 140 or 140'. Each end is inserted and installed, and the bare device 150 is constructed by irradiating and curing the next UV light (S3).

Next, the adhesive liquid is thermally cured (S4) by placing the bare device 150 in a predetermined heat treatment chamber and heating to a predetermined temperature.

Next, after positioning the housing 163 on the outside of the bare device 150 (S5), the boot 165 is installed at both ends of the housing 161 (S6), and a sealing material on the outside of the boot 165. After injection (S7) to thermally solidify (169), after applying the adhesive liquid to both ends of the housing 163, the end cap 167 is installed (S8) to complete the sealing and fixing work.

According to the present invention, the first and second collimators and the optical filters are aligned and fixed at the same time by using the integrated holder to fix the second unit part (combination of the first collimator and the optical filter means). By removing the heat curing process for the process there is an advantage that can significantly reduce the manufacturing process time.

In addition, there is an advantage of minimizing the alignment deviation of each unit component due to the solder drift generated during soldering by eliminating the conventional soldering operation.

In addition, by improving the optical filter fixing structure to simplify the application of the adhesive solution and loading of the optical filter, an automated process is possible. Accordingly, the assembly time of the optical filter can be shortened and the yield can be improved. .

In addition, the number of parts can be reduced by integrating the number of housings into one as compared with the related art.

As described above, in the detailed description of the present invention, specific embodiments have been described. However, various modifications may be made without departing from the scope of the present invention. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be defined by the claims below and equivalents thereof.

Claims (11)

A first collimator to which an optical signal is input; A second collimator installed at a predetermined interval from the first collimator to receive the optical signal; An optical filter installed between the first collimator and the second collimator and configured to pass only light of a specific component among optical signals input through the first collimator; And, And an integrated holder having the optical filter embedded therein, and having one end of the first collimator and the second collimator fixedly inserted at both sides thereof, and having an optical transmission hole formed at both ends thereof. The method of claim 1, The integrated holder optical component assembly, characterized in that consisting of a single body. The method of claim 1, The integrated holder is an optical component assembly for optical transmission, characterized in that consisting of two bodies. The method of claim 2, The integrated holder forms a hollow cylindrical body whose ends are opened, and an opening is provided at one side of the circumferential surface of the cylindrical body, and the opening and the extended inner bottom are formed with a pair of inclined surfaces having symmetrical shapes. And the optical filter is inserted and seated, and both ends of the optical filter are formed at predetermined intervals. The method of claim 4, wherein And an intersecting line where the pair of inclined surfaces intersect to form a parallel or predetermined angle with respect to the longitudinal central axis of the integrated holder. The method of claim 3, wherein The integrated holder forms a hollow state in which both ends are opened, and is formed of a plurality of bodies formed with the light transmitting holes at predetermined intervals at one end thereof, and an end of one of the bodies is formed with an insert portion. Optical component assembly for optical transmission, characterized in that configured to be combined with. A first collimator to which an optical signal is input; A second collimator installed at a predetermined interval from the first collimator to receive an optical signal; An optical filter installed between the first collimator and the second collimator and configured to pass only light of a specific component among optical signals input through the first collimator; An integrated holder for aligning and supporting the first and second collimators and the optical filter; A housing accommodating the integrated holder therein and accommodating the first and second collimators; A boot installed at both ends of the housing; Sealing material injected to the outside of the boot; Optical component assembly for optical transmission, characterized in that consisting of end caps installed on both ends of the housing. The method of claim 7, wherein The boot is an optical component assembly for optical transmission, characterized in that formed of a silicon material. Assembling first and second collimators, which are unit parts; Applying an adhesive solution to the interior of the integrated holder, and then curing the first by embedding an optical filter; Applying an adhesive solution to both ends of the integrated holder and inserting a part of the first and second collimators into the integrated holder to cure the primary; And thermally curing the integrated holder including the first and second collimators and the optical filter by a heat treatment apparatus. 10. The method according to claim 9, wherein the integrated holder forms an opening on the side of the body, and forms a pair of inclined surfaces having a predetermined angle on a surface facing the opening to apply an adhesive liquid to the inclined surface through the opening. And then loading the optical filter on the side of the integrated holder through the opening. Assembling first and second collimators, which are unit parts; Applying an adhesive solution to the interior of the integrated holder and curing the interior of the optical filter; Applying an adhesive solution to both ends of the integrated holder and inserting a part of the first and second collimators into the integrated holder to cure the integrated holder; Thermally curing an integrated holder including the first and second collimators and the optical filter by a heat treatment apparatus; Positioning a housing outside the integrated holder; Inserting boots at both ends of the housing; Injecting a sealing material to the outside of the boot; And mounting end caps on both ends of the housing.

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