KR101950767B1 - Dispenser and light cylinder manufacturing method using the same - Google Patents

Abstract

A dispenser and a method of manufacturing a light cylinder formed thereby are disclosed. The dispenser includes a body in which an optical resin is accommodated; An injecting part formed on one surface of the body and emitting the optical resin; And a bubble discharge passage formed on at least one side surface of the body, the bubble discharge passage removing bubbles generated when the optical resin is released.

Description

Dispenser and method of manufacturing optical cylinder using the same

The present invention relates to a dispenser for injecting an optical resin and a method of manufacturing a light cylinder using the dispenser.

The light pipe is a device that transmits light generated from a light source through the inside of a light pipe, and can be transmitted to a remote place with a relatively small transmission loss and can be made thinner.

A conventional light pipe has an air layer inside a clay, and a reflection plate is installed inside or outside the light pipe. Such a light pipe reflects the incoming light by using a reflector.

In this case, the light output from the light source is uniformly transmitted from the input end of the light pipe to the output end (end) of the light pipe, but is not uniformly transmitted over the entire light pipe due to diffusion generated at the input end of the light pipe .

In addition, there is a disadvantage that uniformity of light transmission is reduced due to leakage phenomenon near the input end of the light pipe.

The present invention provides a dispenser capable of filling a resin capable of ultraviolet curing into the inside thereof, and a method of manufacturing a light cylinder using the dispenser. Here, the light cylinder may have a flexible characteristic.

Another object of the present invention is to provide a dispenser capable of effectively removing bubbles generated by filling an optical resin and ensuring uniformity over the entire area of a light cylinder, and a method of manufacturing a light cylinder using the dispenser.

According to one aspect of the present invention, there is provided a dispenser for optical resin injection and a method of manufacturing a light cylinder formed thereby.

According to the first embodiment, there is provided a liquid crystal display comprising: a body in which an optical resin is accommodated; An injection unit formed on one surface of the body and emitting the optical resin; And a bubble discharging passage formed on at least one side of the body, the bubble discharging passage removing bubbles generated when the optical resin is discharged.

The bubble discharge passage may be formed on both sides of the body, and may be formed adjacent to the injection unit.

The bubble eliminating passage may be formed with a leakage preventing film for preventing the optical resin leakage.

The leakage preventing film may be formed on one surface of the bubble discharging passage contacting the one side surface of the body.

A part of the body adjacent to the injection unit may have a round corner shape, and the bubble discharge passage may be formed on one side of the round corner.

The bubble eliminating passage may be formed in an " a " shape to prevent the optical resin leakage.

The bubble eliminating passage may communicate with a tank for accommodating the optical resin.

The bubble discharge passage may be formed by connecting the lower region and the upper region of one side of the body so as to penetrate.

The injection unit may be coupled with an injection needle.

According to the second embodiment, the first step of filling the clay with the optical resin using the dispenser containing the optical resin; And a second step of curing the filled optical resin, wherein the refractive index of the optical resin to be filled is determined in consideration of the refractive index of the clay, and the dispenser is capable of removing air bubbles which can be generated in the filling process The method of manufacturing a light cylinder can be provided.

The direction for curing the optical resin corresponds to the direction in which the optical resin is filled, and the curing is ultraviolet curing.

A bubble discharge passage through which the bubble can be discharged to the outside can be formed on one side of the dispenser.

In the first step, the closure may be coupled to one end of the clay.

The optical cylinder according to the present invention includes a core filled with a resin for ultraviolet curing, and can output the light output from the light source and totally transmit the light to the output terminal.

At this time, the resin is selected in consideration of the refractive index of the clay of the optical cylinder so that total internal reflection can be performed, and may be a single material or a mixed material. In particular, when the resin is made of a mixed material, the combination of the resin may be variously modified so long as it allows internal total internal reflection. That is, the selection width of the filled resin can be widened.

Further, in manufacturing the optical cylinder according to an embodiment of the present invention, bubbles generated by filling the optical resin for curing with ultraviolet rays are removed, and uniformity of light transmission in the entire region of the optical cylinder can be secured.

1 is a perspective view of a light cylinder according to a first embodiment;
2 is a perspective view of a light cylinder according to a second embodiment;
3 is a view showing the structure of a dispenser for manufacturing a light cylinder according to the first embodiment;
4 is a view showing a structure of a dispenser for manufacturing a light cylinder according to a second embodiment;
5 is a view showing a manufacturing process of an optical cylinder according to the first embodiment;
6 is a view for explaining a manufacturing process of a light cylinder according to the first embodiment;
7 is a view showing a simulation result of a light leakage produced by a light cylinder according to the first embodiment and a light cylinder manufactured by extrusion molding.
8 is a view showing a bubble movement path according to an embodiment of the present invention;
9 and 10 are diagrams illustrating dispensers compared to dispensers of the present invention.
11 illustrates a dispenser system in accordance with one embodiment of the present invention.
12 illustrates operation of a dispenser according to an embodiment of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The present invention is capable of various modifications and various embodiments, and specific embodiments are illustrated in the drawings and described in detail in the detailed description. It is to be understood, however, that the invention is not to be limited to the specific embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

The terms first, second, etc. may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another.

The terminology used in this application is used only to describe a specific embodiment and is not intended to limit the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. In the present application, the terms "comprises" or "having" and the like are used to specify that there is a feature, a number, a step, an operation, an element, a component or a combination thereof described in the specification, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

The present invention relates to a dispenser capable of filling an optical resin for manufacturing a light cylinder manufactured by filling an optical resin capable of being cured with ultraviolet rays, and a method of manufacturing an optical cylinder using the dispenser.

The light cylinder can be manufactured by filling a light-transmissive optical resin in a light-diffusible clay such as a tube or the like, followed by ultraviolet curing. Here, the core produced as the filled optical resin is cured may have a total reflection relationship with the clay. As a result, the light incident on the optical cylinder can be transmitted to the output end of the optical cylinder without leakage.

Here, the optical resin can be filled in the clay by using a dispenser. The dispenser according to the first embodiment can effectively remove bubbles generated in the process of filling the optical resin in the clay. This will be described in more detail with reference to FIG. 3 below.

Further, according to another embodiment, the resin forming the core may be produced by mixing a plurality of materials capable of transmitting light. Preferably, a resin having a desired refractive index may be formed by mixing optical materials so as to form a total reflection relationship with the material forming the clay. However, it should be apparent to those skilled in the art that the constituents of the resin can be variously modified as long as the clay and the core have a total internal reflection, and such modifications fall within the scope of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a perspective view of a light cylinder according to a first embodiment, and FIG. 2 is a perspective view of a light cylinder according to a second embodiment.

As shown in FIG. 1, the optical cylinder 100 according to the first embodiment includes a clay (110), a clay (outer layer), and a core (120, core, inner layer). The shape of the optical cylinder 100 is not particularly limited, and may have various shapes such as a circle, a support, an ellipse, a square, and a triangle. Further, the shape of the light cylinder 100 may be curved.

The clay 110 is the sheath of the light diffusible light cylinder 100. The clay 110 may be formed of a flexible material that can be bent or bent. A curved clay is shown in Fig.

According to the first embodiment, the shape of the clay 110 may be a cylindrical shape such as a cylinder, a tube, or the like. Of course, the clay 110 may have various shapes such as a square, a triangle, a plane, etc. in addition to a cylindrical shape. The shape of the clay 110 is not limited as long as it is formed of a material capable of diffusing light and bending.

The clay 110 may be formed of a transparent or opaque resin.

The clay 110 may also be applied as an outfit product, such as a ready-made tube or cylinder.

Although the thickness of the clay 110 according to the first embodiment is not particularly limited, it is preferable that the thickness of the clay 110 is 0.01 mm or more and 1 mm or less for thinning. However, the thickness of the clay 110 can effectively confine the light incident on the optical cylinder 100, and can be determined to such a thickness that the optical cylinder 110 can rotate.

The inside of the clay 110 includes voids (i.e., holes), since the clay 110 must simultaneously perform the function of sheathing for forming the core 120. [

The clay 110 may be formed of a material such as polymethyl methacrylate (PMMA), polycarbonate (PC), polypropylene (PP), polyethylene (PE), polyurethane (PU), thermosetting A thermoplastic urethane elastomer (TPU), or the like, and can be manufactured using a material having transparency.

Can be formed through homopolymers or copolymers of polymethylmethacrylate (PMMA), polycarbonate (PC) homopolymers and copolymers or resins based on polypropylene homopolymers or copolymers.

Here, polymethyl methacrylate (PMMA) is a polymer having methyl methacrylate as a raw material and has the highest transparency and weatherability among plastics, has a light transmittance of 90 to 91%, and is easily colored.

Polycarbonate (PC) is easily processed by injection molding, extrusion molding, and has excellent optical properties and toughness. That is, the polycarbonate resin has a visible light transmittance of about 89% on average.

Polypropylene is a thermoplastic resin that softens when heated, forms a spiral structure with a polymer of propylene monomer, has a unique crystal structure, and has properties such as excellent rigidity, heat resistance, and chemical stability.

Polyethylene (PE) is divided into Low Density Polyethylene (LDPE) and High Density Polyethylene (HDPE). It has the advantage of being manufactured easily when manufacturing clay by extrusion process.

In the case of polyurethane and thermosetting urethane elastomer, it is a material having a three-dimensional structure, which has quality and chemical stability and has an advantage that a material having high transmittance can be formed.

The core 120 may be formed by filling the clay 110 with an ultraviolet curing resin and curing it. The core 120 may have transparency.

According to one embodiment, the core 120 may be a homopolymer or copolymer of polymethyl methacrylate (PMMA), a polycarbonate (PC) homopolymer or copolymer or a polypropylene homopolymer or copolymer, Or a combination thereof.

A method of forming the core 120 and the clay by an extrusion molding method without filling the clay 110 with ultraviolet ray hardening resin may be considered in the method of forming the core 120 inside the clay 110. [ However, when a light cylinder is manufactured by the extrusion molding method, the material of the core that can be used in the extrusion molding is limited. As a result, due to the material limitations of the core, the clay and core may not have a total internal reflection, and a leakage phenomenon may occur.

Therefore, in the method of manufacturing the optical cylinder of the present invention, the optical cylinder 100 can be manufactured by filling the clay 110 with an optical resin capable of achieving high refractive index, which can realize ultraviolet curing, in order to realize easy total internal reflection characteristics. At this time, the ultraviolet ray-curable resin may be variously combined and a combination of materials may be used so as to have a desired refractive index. Thus, an optical resin capable of forming total internal reflection depending on the material constituting the clay 110 may be used. On the other hand, the refractive index of the core 120 formed by ultraviolet curing the resin may be higher than the refractive index of the clay 110 according to Snell's law.

For example, when the clay 110 is made of polymethyl methacrylate (PMMA) having a refractive index of 1.492, an optical resin capable of having a refractive index of 1.495 to 1.58 in order to improve the total internal reflection property according to Snell's law . ≪ / RTI >

Particularly, when the light cylinder 100 has a curved shape as shown in FIG. 2, the clay 110 is formed in consideration of the material of the clay 110 so that the light leakage phenomenon does not occur near the input end of the light cylinder 100 The refractive index of the optical resin or the optical resin to be filled can be determined.

However, such an optical resin may be a single substance or a mixed substance. In the case of a mixed material, the materials constituting the optical resin may be various combinations so as to match the refractive index of the determined resin. For example, when the refractive index of the optical resin to be filled is determined to be 1.5, an acrylic resin having excellent optical properties and an acrylate having excellent adhesiveness as a main chain, an optical resin having a high refractive index, and an acrylate . That is, the combination of the optical resin may be variously modified as long as the refractive index is determined.

Although it is mentioned above that two materials are combined to form a filler resin, three or more materials may be combined.

In the above description, the filling resin is ultraviolet cured. However, the filling resin is not limited to ultraviolet rays as long as the filling resin is cured after being filled in the clay 110.

In summary, in the optical cylinder manufacturing method of the present embodiment, the optical resin having the refractive index determined in consideration of total internal reflection is filled in the clay 110, and ultraviolet rays are cured to form the core 120. In this case, since the core 120 is formed using the filling method, various combinations of the optical resins are possible, and the core 120 having a desired refractive index can be formed by appropriately combining the materials according to the refractive index of the clay 110 have. As a result, light incident on the optical cylinder 100 can be output through the output terminal without leakage. Also, the light leakage phenomenon near the input end of the light cylinder 100 can be considerably reduced.

Further, in the conventional light pipe, a reflector is required to transmit light. However, in the optical cylinder 100 of the present embodiment, no reflector is required at all, and therefore, the structure of the optical seal renderer 100 is simplified, .

In the above description, the core 120 is described as one layer, but the core 120 may be formed of a plurality of layers.

The optical cylinder 100 may be formed by filling an optical resin into the clay 110 by the dispenser 300 shown in FIG. Hereinafter, the structure of the dispenser for manufacturing the optical cylinder will be described with reference to FIG.

FIG. 3 is a view showing a structure of a dispenser for manufacturing a light cylinder according to the first embodiment, and FIG. 4 is a view showing a structure of a dispenser for manufacturing a light cylinder according to the second embodiment.

3, a dispenser for filling an optical resin in the clay 110 to manufacture a light cylinder includes a body 310, a connecting portion 315, a first inlet 320, an injection portion 325, And a bubble discharge passage (330).

The body 310 is a space for accommodating the optical resin. The body 310 has a first inlet 320 for receiving an optical resin and a second inlet 325 for emitting an optical resin on the other surface facing the first inlet 320. Hereinafter, the second inlet 325 will be referred to as an injection section for convenience.

A connecting portion 315 may be positioned between the body 310 and the first inlet 320. The connection part 315 connects the first inlet 320 formed in a tube type and the body 310 of the dispenser.

Further, at least one side surface of the body 310 is formed with a bubble discharge passage 330 for removing bubbles generated by the optical resin discharge.

When the optical resin is filled into the clay 110 according to the opening of the injection part 325, bubbles may be generated near the injection part 325. The bubbles formed in accordance with the release of the optical resin rise up due to their characteristics, and when the number of rising bubbles increases, some bubbles may enter the clay 110 through the injection part 325 together with the optical resin. That is, bubbles are formed inside the optical cylinder, and as a result, light can not be smoothly transmitted through the optical cylinder, that is, the optical efficiency, for example, the total reflection efficiency may be lowered.

Therefore, it is important to remove air bubbles that can be generated when the optical resin is filled into the clay 110 through the injection part 325. [

According to one embodiment, the bubble discharge passage 330 may be formed in a part of the body 310 so that the bubble can be discharged to the outside when the bubble generated near the injection unit 325 rises. As a result, since the bubbles are not continuously accumulated and are discharged to the outside every time the bubbles are discharged, it is possible to prevent the bubbles from penetrating into the clay 110.

As shown in FIG. 8, bubbles generated when filling the optical resin into the clay 110 move along the wall surface of the body 310 and rise upward. Accordingly, in order to remove bubbles most efficiently, it is preferable that the body 310 is formed in a round corner shape in a portion communicating with the bubble discharge passage 330.

9, when the body 310 is formed to have a gentle slope in the direction of the injection unit 315, the bubbles may move along the inside of the body 310. Accordingly, in order to completely remove the bubbles generated inside the body 310, there is a disadvantage that bubbles must be removed by opening the nozzles of the injection unit 325.

10, even when the body 310 is formed to have a steep slope in the direction of the injection part 325 and to have a gentle inclination again, the bubbles are formed inside the optical resin , The inside of the body 310).

Accordingly, the bubble discharge passage 330 may be formed through a part of one side of the body 310 to effectively remove bubbles generated in the optical resin supplied into the body 310. That is, the bubble discharge passage 330 is formed so as to communicate with the round corner region of the body 310 to effectively remove bubbles generated upon filling the optical resin.

At this time, the bubble discharge passage 330 may have a small diameter or be formed in an upward direction so that the optical resin is not discharged through the bubble discharge passage 330. The bubble eliminating passage 330 may be designed in consideration of the injection rate of the optical resin and the like.

As another example, the bubble eliminating passage 330 may be formed with a barrier film for preventing the optical resin from leaking. At this time, the prevention film may be formed at a position where the bubble discharge passage 330 passes through one side of the body 310 to prevent the optical resin from leaking along the bubble discharge passage 330. Therefore, only the bubbles generated without leakage of the optical resin can be discharged and removed along the bubble discharge passage 330 through the barrier film.

As another example, the bubble removing passage 330 may be formed in an " a " shape to prevent the optical resin from leaking from the body 310. That is, the bubble discharge passage 330 abutting on the body 310 is low, and the other surface may be formed so as to be discharged only bubbles.

As another example, the bubble eliminating passage 330 may be formed in the shape of a handle that passes through the lower surface and the upper surface of at least one side surface of the body 310.

The bubble removing passage 330 may be formed at a position adjacent to the injection section 325. Thereby, there is an advantage that bubbles formed according to the release of the optical resin can be directly removed.

In addition, the bubble discharging passage 330 may be formed to cooperate with a separate tank for resin supply, as shown in FIG. Even if the optical resin resin flows out through the bubble discharging passage 330, the optical resin resin can be introduced into the resin supply tank and utilized again.

That is, in the optical cylinder manufacturing method of the present embodiment, the bubble discharge passage 330 is formed in the body 310 of the dispenser 300 for uniform total reflection of the optical cylinder 100, So that bubbles can not be injected into the clay 110.

3 shows an example in which the bubble discharge passage 330 is formed in the body 310 of the dispenser 300. The bubble discharge passage 330 may be formed on both sides of the body of the dispenser 300, May be formed.

The position where the bubble discharge passage 330 is formed in a part of one side of the body 310 may not be particularly limited. However, it is preferable to be formed adjacent to the injection part 325 in order to immediately remove bubbles generated when the optical resin is filled through the injection part 325. [

The injection portion 325 is a member for injecting the optical resin into the clay.

The injection unit 325 is not shown in FIG. 3, but may be connected to a motor. That is, the injection section 325 can be controlled to be opened and closed according to the operation of the motor.

Fig. 12 shows the closed and open states of the injection section 325. Fig. As shown in Fig. 12, the optical resin is not filled with the clay 110 when the injection part 325 is closed. However, when the injection part 325 is opened, the optical resin can be discharged and filled into the clay 110. [

That is, the injection unit 325 may be configured as a valve. The optical resin accommodated in the body 310 can be released into the clay 110 through the injection part 325 when the injection part 325 is opened by the connected motor .

The optical resin accommodated in the body 310 is not discharged through the injection part 325 when the injection part 325 is closed (that is, the valve is locked) according to the control of the motor.

Further, an injection needle may be connected to the injection unit 325.

The injection needle is connected to the injection unit 325, so that the optical resin can be easily released into the clay 110. [

FIG. 5 is a view showing a manufacturing process of the optical cylinder according to the first embodiment, and FIG. 6 is a view illustrating the manufacturing process of the optical cylinder according to the first embodiment.

In the first step 510, a clay 110 having an inner hole such as a tube or a cylinder is inserted to fabricate the optical cylinder 100 using a filling method. In order to facilitate understanding and explanation, it is assumed that the clay 110 has the shape of a cylinder or a tube, but the shape of the clay 110 may be a square, a triangle, or the like and may be curved. The first step is as shown in 610 of FIG. According to one embodiment, the clay 110 may be an off-the-shelf product.

Clay 110 charged for light cylinder manufacture is temporarily held (held) in holder 610. Then, the roller member 615 is moved in a row in the conventional manner to fill the optical resin in the clay 110.

The roller member 615 is connected to one end of the holder 610 and the clay 110 held on the holder 610 by the roller member 615 is moved in a row.

As shown in FIG. 6, in the second step 515, the clay 110 is filled with an optical resin that can be cured by ultraviolet rays. For example, assume that the clay 110 is in the shape of a cylinder or a tube. The piston 315 located in the dispenser 300 is pressed in the second step 515 so that the optical resin accommodated in the dispenser 300 under the pressure of the piston 315 is pressed by the injection part 325 And discharged into a cylinder or a tube to be filled.

3, the dispenser 300 can immediately remove bubbles generated by the release of the optical resin to release the optical resin to the clay 110. [

The clay 110 prevents the optical resin from flowing to the other surface of the clay 110 in order to prevent the optical resin from flowing through the other surface opposite to the charging direction in which the optical resin is charged when the optical resin is filled, A closure part 620 for clipping the optical resin to the clay 110 may be connected. As already mentioned above, the optical resin may be an ultraviolet curable resin.

The stopper portion 620 can be positioned at the lower end where the roller member 615 is located. That is, the stopper 620 is formed for the purpose of preventing the optical resin filled in the clay 110 from flowing, so that the stopper 620 is not positioned at the lower end of the holder 610. In the third step 520, a defoaming process may be performed to remove bubbles generated in filling the clay 110 with the optical resin. If the bubbles are penetrated into the clay 110 without being removed, the optical characteristics of the optical cylinder 100, for example, the uniformity of light transmission, may be reduced. Therefore, the method of manufacturing a light cylinder of this embodiment also removes bubbles while filling the clay 110 with the optical resin. As a result, there is an advantage that the uniformity of light transmission of the core 120 can be increased.

In the fourth step 525, the filled optical resin is cured. At this time, the curing may be ultraviolet curing.

6, the ultraviolet ray irradiation direction for ultraviolet curing of the resin can be irradiated in a direction coinciding with the direction in which the resin is injected into the clay 110. [

As shown in FIG. 3, a light cylinder 100 manufactured using a resin that can be cured with ultraviolet rays has an advantage in that the material constituting the resin can be mixed and the refractive index can be easily controlled.

An inspection process for inspecting the optical cylinder 100 manufactured by ultraviolet curing in the fifth step 530 is performed. It is possible to check whether or not a uniform core is formed by filling the optical cylinder 100 with the optical resin through the inspection process.

In the sixth step (535), the optical cylinder (100) passed the inspection process is commercialized.

7 is a graph comparing simulation results of the light leakage phenomenon of the optical cylinder manufactured according to the extrusion molding and the optical cylinder according to the first embodiment.

Fig. 7 (a) is a simulation result of light leakage of the optical cylinder according to the first embodiment, and Fig. 7 (b) is a simulation result of light leakage of a light cylinder manufactured by extrusion molding.

As shown in FIG. 7 (b), it can be seen that many light leakage phenomena are generated in the curve region where the light source is incident in the optical cylinder manufactured by extrusion molding.

In contrast, in the light cylinder 100 manufactured by filling the ultraviolet ray-curing resin as in the first embodiment, it can be seen that leakage of light in the curve region where the light source is incident is hardly generated.

In addition, in the light pipe manufactured by the extrusion process and the optical cylinder according to the first embodiment, a small amount of leakage phenomenon occurs in the bended part (A), but a very small amount It is lighted.

As a result, when comparing the light source emitted from the output portion opposed to the surface on which the light source is incident, the light cylinder manufactured according to the extrusion molding has a large amount of light due to the light leakage phenomenon that is largely emitted in the curve region adjacent to the point where the light source is incident And light is emitted relatively weakly at the output end of the light cylinder.

On the other hand, the optical cylinder manufactured by filling the outer-curing resin according to the first embodiment has a light leakage phenomenon in a region where a lot of light loss has occurred in a light cylinder manufactured by extrusion molding (a curve region adjacent to a point where a light source is incident) The light is uniformly emitted from the output end of the light cylinder.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention as defined in the appended claims. It will be understood that the invention may be varied and varied without departing from the scope of the invention.

100: Light cylinder
110: Clay
120: Core
300: Dispenser
310: Body
315:
320, 325: first inlet, second inlet
330: bubble discharge passage

Claims (3)

A first step of filling the clay with an optical resin using a dispenser containing an optical resin; And
And a second step of curing the filled optical resin,
The dispenser may include a bubble discharge passage communicating with one side of the body accommodating the optical resin to remove bubbles generated when the optical resin is discharged. The bubble discharge passage may be used to remove bubbles generated in the filling process The bubble discharge passage is formed to communicate with a part of the body formed in a rounded corner shape and the other end is formed to be higher than one end of the bubble discharge passage in order to prevent the optical resin leakage, And the other end is formed so as to communicate with an upper region of the body in which the optical resin is accommodated so as to be recycled when the optical resin leaks through the bubble discharge passage, and a portion of the body is formed to have a gentle slope toward the injection portion,
Wherein the optical resin to be filled is formed by combining a plurality of optical materials having a refractive index higher than the refractive index of the clay in consideration of the refractive index of the clay and forming a total reflection relationship with the material forming the clay . The method according to claim 1,
Wherein a direction for curing the optical resin coincides with a direction in which the optical resin is filled,
Wherein said curing is ultraviolet curing.
The method according to claim 1,
Wherein a closure is coupled to one end of the clay in the first step.

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