KR100598958B1 - Fabrication method of lens by using curing material - Google Patents

Abstract

The present invention relates to a method for manufacturing a lens using a curable material. The manufacturing method may include preparing a first lens, applying a curable resin to one surface of the first lens to form a lens shape to be paired with the first lens, and curing the curable resin to integrate the first lens. 2 Form the lens. In this way, a curable material is added to a prefabricated lens to form a second lens to be paired with the lens, thereby precisely aligning an optical axis therebetween.

Imaging, lens, dispersion, chromatic aberration, optical axis, alignment, curability

Description

Lens manufacturing method using a curable material {FABRICATION METHOD OF LENS BY USING CURING MATERIAL}             

1 to 6 are cross-sectional views showing each step of the lens manufacturing method using a curable material according to a first embodiment of the present invention.

7 and 8 are cross-sectional views showing each step of the lens manufacturing method using a curable material according to a second embodiment of the present invention.

9 to 12 are cross-sectional views illustrating respective steps of a method of manufacturing a lens using a curable material according to a third exemplary embodiment of the present invention.

13 is a cross-sectional view illustrating one step of a lens manufacturing method according to a fourth embodiment of the present invention.

14 and 15 are cross-sectional views illustrating a method of manufacturing a lens using a curable resin according to a fifth exemplary embodiment of the present invention.

The present invention relates to a method for manufacturing a lens using a curable material. More specifically, the present invention relates to a lens manufacturing method using a curable material by adding a curable material to a pre-fabricated lens to produce a second lens paired with the lens.

In general, an imaging lens does not form a clear image due to chromatic aberration when only one sheet is used due to the dispersibility of the lens material. In order to eliminate the deterioration of image sharpness due to chromatic aberration, several lenses made of materials having different dispersibility are used. The lenses used for this purpose are manufactured separately and then combined with each other.

In general, convex lenses are composed of a material having a low dispersibility, and concave lenses are used as a material having a high dispersibility. Therefore, when these convex and concave lenses are combined with each other, the chromatic aberration of each other is corrected to obtain an image from which chromatic aberration is removed.

These convex and concave lenses, on the other hand, are made separately as described above and then glued together, requiring sophisticated work for optical axis alignment.

Meanwhile, with the development of Wafer Level Packaging (WLP) technology, it is expected that the image acquisition sensor used in the camera will also be manufactured by WLP rather than wire bonding. For the sensor manufactured by this method, the conventional imaging lens also needs to be manufactured with fine dimensions.

However, the convex and concave lenses finely processed as described above are not only easy to combine with each other, but also have difficulty in accurately aligning the optical axes.

Therefore, the present invention has been made to solve the above-described problems of the prior art, an object of the present invention is to add a curable material to a pre-fabricated lens to form a second lens paired with the lens to precisely adjust the optical axis therebetween It is to provide a lens manufacturing method using a curable material that can be aligned.

Another object of the present invention is to provide a lens manufacturing method using a curable material capable of precisely aligning the optical axis therebetween by forming an intermediate lens by injecting a curable material into the space between the first and second lenses made in advance will be.

It is another object of the present invention to manufacture a plurality of imaging lenses at once by arranging a plurality of prefabricated lenses on one plate and pouring a curable material on each lens to form a second lens that is paired with these lenses. It is to provide a lens manufacturing method.

In order to achieve the above object of the present invention, the present invention provides a first lens, a curable resin is added to one surface of the first lens to form a lens shape to be paired with the first lens, the curable resin It is characterized by providing a lens manufacturing method using a curable resin to form a second lens integrated with the first lens.

In addition, the present invention comprises the steps of preparing a first lens; Pouring curable resin on one surface of the first lens; Forming the curable resin into a lens shape paired with the first lens by covering the die formed in a lens shape paired with the first lens on the curable resin on one side of the first lens; Curing the curable resin to form a second lens integrated with the first lens; And it provides a lens manufacturing method using a curable resin comprising the step of removing the formwork.

In addition, the present invention comprises the steps of preparing a first lens; Coupling a die engraved in a lens shape to be paired with the first lens to one surface of the first lens; Filling a curable resin into a space between the first lens and the formwork; Curing the curable resin to form a second lens integrated with the first lens; And it provides a lens manufacturing method using a curable resin comprising the step of removing the formwork.

In addition, the present invention comprises the steps of preparing a first lens; Preparing a curable resin having a predetermined viscosity and surface tension; Discharging the curable resin to one surface of the first lens by a predetermined amount to form a lens shape having a predetermined surface curvature while being paired with the first lens; And curing the discharged curable resin to form a second lens integrated with the first lens.

In addition, the present invention comprises the steps of preparing a plurality of first lenses arranged on the plate; And forming a second lens by any one of the above-described methods.

In the method according to the present invention, the curable resin has a dispersibility for correcting chromatic aberration of the first lens.

In addition, the present invention comprises the steps of preparing a first lens; Pouring curable resin on one surface of the first lens; Preparing a second lens engraved into a lens shape that is paired with the first lens and covering the second lens with the curable resin on one surface of the first lens; And curing the curable resin to form an intermediate lens integrated with the first and second lenses, thereby providing a lens manufacturing method using the curable resin.

In addition, the present invention comprises the steps of preparing a first lens; Coupling a second lens engraved into a lens shape that is paired with the first lens to one surface of the first lens; Filling the curable resin into a space between the first lens and the second lens; And curing the curable resin to form an intermediate lens integrated with the first and second lenses, thereby providing a lens manufacturing method using the curable resin.

In addition, the present invention comprises the steps of preparing a plurality of first lenses arranged on the plate; And it provides a lens manufacturing method comprising the step of forming an intermediate lens by any one of the methods described above.

In the method of the present invention, the curable resin has a dispersibility for correcting chromatic aberration of the first and second lenses.

In the method of the present invention, the curing step is characterized by using heat or ultraviolet light.

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

1 to 6 are cross-sectional views showing each step of the lens manufacturing method using a curable material according to a first embodiment of the present invention.

First, a convex first lens 12 as shown in FIG. 1 is prepared. The first lens 12 has a convex body 14 at the center thereof, and an extension 16 and a flange 18 extending upwardly from the extension 16 to form a concave space 20. Formed.

Next, as shown in FIG. 2, the curable resin 22 is poured into the space 20. The curable resin 22 is selected from a material cured by ultraviolet rays, and has a dispersibility capable of correcting chromatic aberration by the first lens 12. For example, as shown in the drawing, when the first lens 12 is a convex lens, since the first lens 12 is made of a material having a low dispersibility, the curable resin 22 is selected as a material having a high dispersibility. 12) Chromatic aberration with must be corrected. Alternatively, as the curable resin 22, a material that is cured by heat may be selected.

Next, as shown in FIGS. 3 and 4, the mold 24 engraved into the lens shape 26 to be paired with the first lens 12 is prepared, and the curable resin 22 is poured therein. The upper surface of the first lens 12 is covered.

In this way, the curable resin 22 has the shape of the second lens 22a paired with the first lens 12 by the first lens 12 and the formwork 24.

In this state, ultraviolet rays are applied as shown in FIG. 5 to cure the second lens 22a. On the other hand, when the formwork 24 is made of a transparent or UV-transmitting material, ultraviolet rays may be applied to the upper side of the drawing, that is, the formwork 24. Of course, when the second lens 22a is made of a thermosetting resin that is cured by heat, heat is applied to cure the second lens 22a.

When the second lens 22a is sufficiently cured for a predetermined time, the mold 24 is removed to form the imaging lens 10 in which the first lens 12 and the second lens 22a are integrated as shown in FIG. 6. You get

The imaging lens 10 manufactured as described above has an advantage that the optical axes thereof are automatically aligned since the second lens 22a is formed on the first lens 12 prepared in advance.

In addition, since the second lens 22a is selected such that the resin 22 has a dispersibility for correcting chromatic aberration of the first lens 12, the imaging lens 10 manufactured according to the above method has the chromatic aberration removed. You win a prize.

7 and 8 are cross-sectional views showing each step of the lens manufacturing method using a curable material according to a second embodiment of the present invention. Hereinafter, a method of manufacturing a lens according to the second embodiment will be described with reference to FIGS. 1, 5, and 6, which will be described with reference to FIGS. 7 and 8.

First, the first lens 12 as shown in FIG. 1 is prepared. The first lens 12 is as described in the first embodiment.

Then, as shown in FIG. 7, the mold 24a engraved into the lens shape 26 to be paired with the first lens 12 is prepared, and is covered with an upper surface of the first lens 12. . Unlike the formwork 24 of the first embodiment, the formwork 24a has a resin inlet 28 and a gas outlet 30.

Subsequently, as shown in FIG. 8, the curable resin 22 is injected into the space of the first lens 12 in the direction of the arrow A through the resin injection hole 28. As the injection means, a dispenser or the like capable of metering can be used. In this case, as the curable resin 22 is injected, the gas inside is discharged to the outside in the direction of the arrow B through the discharge port 30. Alternatively, a vacuum atmosphere may be provided in the space 20 and the lens shape 26 of the first lens 12, and then curable resin may be injected.

The curable resin 22 is selected from a material cured by ultraviolet rays, and has a dispersibility capable of correcting chromatic aberration by the first lens 12. For example, as shown in the drawing, when the first lens 12 is a convex lens, since the first lens 12 is made of a material having a low dispersibility, the curable resin 22 is selected as a material having a high dispersibility. 12) Chromatic aberration with must be corrected. Alternatively, as the curable resin 22, a material that is cured by heat may be selected.

In this way, the curable resin 22 has a second lens shape paired with the first lens 12 by the first lens 12 and the formwork 24.

In this state, ultraviolet rays are applied as shown in FIG. 5 to cure the second lens 22a. On the other hand, when the formwork 24a is made of a transparent or ultraviolet light transmitting material, ultraviolet rays may be applied to the upper side of the drawing, that is, the formwork 24a. Of course, when the second lens 22a is made of a thermosetting resin that is cured by heat, heat is applied to cure the second lens 22a.

When the second lens 22a is sufficiently cured for a predetermined time, the mold 24a is removed to form an imaging lens 10A in which the first lens 12 and the second lens 22a are integrated as shown in FIG. 6. You get

The imaging lens 10A manufactured in this way has the advantage that the optical axes thereof are automatically aligned since the second lens 22a is formed on the first lens 12 prepared in advance as in the first embodiment described above.

In addition, since the second lens 22a is selected such that the resin 22 has a dispersibility for correcting the chromatic aberration of the first lens 12, the imaging lens 10A manufactured according to the above method has the chromatic aberration removed. You win a prize.

9 to 12 are cross-sectional views illustrating respective steps of a method of manufacturing a lens using a curable material according to a third exemplary embodiment of the present invention.

First, a convex first lens 102 as shown in FIG. 9 is prepared. The first lens 102 has a convex body 104 at the center thereof, and an extension 106 and a flange 108 extending upwardly from the extension 106 to form a concave space 110. Formed.

Next, as shown in FIG. 10, the curable resin 112 is poured into the space 110. The curable resin 112 is selected from a material that is cured by ultraviolet rays, and has a dispersibility capable of correcting chromatic aberration of the first lens 102 and the second lens 114 described later. Alternatively, as the curable resin 112, a material that is cured by heat may be selected.

Next, as shown in FIG. 11, the second lens 114 is prepared. The second lens 114 has a convex body 116 and has an extension 118 around it and a flange 120 extending downward. When the second lens 114 having such a shape is combined with the first lens 102, the second lens 114 forms a space therebetween.

Then, as shown in FIG. 12, the second lens 114 is covered on the upper surface of the first lens 102 on which the curable resin 112 is poured.

In this way, the curable resin 112 has the shape of the intermediate lens 112a paired with the first lens 102 and the second lens 114 by these.

In this state, ultraviolet rays are applied under the drawing, that is, toward the first lens 102 to cure the intermediate lens 112a. Meanwhile, since the second lens 114 is made of a transparent material, ultraviolet rays may be applied from the upper side of the drawing, that is, the die 114. Of course, when the intermediate lens 112a is made of a thermosetting resin cured by heat, the intermediate lens 112a is hardened by applying heat.

When the second lens 112a is sufficiently cured for a predetermined time and integrated with the first lens 102 and the second lens 114, an imaging lens 100 is obtained.

The imaging lens 100 manufactured as described above has an advantage that the optical axes thereof are automatically aligned because the intermediate lens 112a is formed between the first and second lenses 102 and 114 prepared in advance.

In addition, since the intermediate lens 112a is selected such that the resin 112 has a dispersion ability to correct chromatic aberration of the first and second lenses 102 and 114, the imaging lens 100 manufactured according to the above method is You get an image with chromatic aberration removed.

13 is a cross-sectional view illustrating one step of a lens manufacturing method according to a fourth embodiment of the present invention. Hereinafter, a method of manufacturing a lens according to the fourth embodiment will be described with reference to FIGS. 9 and 12, which will be described with reference to FIG. 13.

First, the first lens 102 as shown in FIG. 13 is prepared. The first lens 102 is as described in the third embodiment.

Then, as shown in FIG. 13, a second lens 114a engraved in a lens shape that is paired with the first lens 102 is prepared, and is covered with an upper surface of the first lens 102. Unlike the second lens 114 of the first embodiment, the second lens 114a has a resin inlet 122 and a gas outlet 124.

Subsequently, the curable resin 112 is injected into the space between the first lens 102 and the second lens 114a through the resin injection hole 122. As the injection means, a dispenser or the like capable of metering can be used. In this case, as the curable resin 112 is injected, the gas inside is discharged to the outside through the discharge port 124. Alternatively, a vacuum atmosphere may be provided in the space between the first and second lenses 102 and 114a and then the curable resin 112 may be injected.

The curable resin 112 is selected from a material cured by ultraviolet rays, and has a dispersibility capable of correcting chromatic aberration of the first and second lenses 102 and 114a. Alternatively, as the curable resin 112, a material that is cured by heat may be selected.

In this way, the curable resin 112 has an intermediate lens shape paired with them between the first lens 102 and the second lens 114a.

In this state, ultraviolet rays are applied to cure the second lens. Meanwhile, since the second lens 114a is made of a transparent material, ultraviolet rays may be applied from the upper side of the drawing, that is, the second lens 114a. Of course, when the intermediate lens is made of a thermosetting resin that is cured by heat, heat is applied to cure the second lens.

When the second lens is sufficiently cured for a predetermined time and integrated with the first lens 102 and the second lens 114a, an imaging lens 100A is obtained.

In addition, since the intermediate lens is selected such that the resin 112 has a dispersibility for correcting chromatic aberration of the first and second lenses 102 and 114a, the imaging lens 100A manufactured according to the above method eliminates chromatic aberration. You get a reward.

14 and 15 are cross-sectional views illustrating a method of manufacturing a lens using a curable resin according to a fifth exemplary embodiment of the present invention. Hereinafter, a lens manufacturing method according to a fifth exemplary embodiment of the present invention will be described with reference to FIGS. 14 and 15.

First, the first lens 202 is prepared as shown in FIG. 14. The first lens 202 has a flat upper surface 202a and a lower surface 202b having a convex body 204 and an extension 206 formed around the body 204.

Subsequently, an ultraviolet curable resin having a predetermined viscosity and surface tension is prepared so as to form a predetermined curvature when discharged in a predetermined amount on a specific surface.

When the curable resin is discharged to the upper surface 202a of the first lens 202 by a predetermined amount, the discharged curable resin has a predetermined surface curvature as shown in FIG. 15 by its viscosity and surface tension. The shape of the second lens 208 is obtained.

When the curable resin is cured by applying ultraviolet rays in this state, the imaging lens 200 in which the first lens 202 and the second lens 208 are integrated is obtained.

In contrast, when the curable resin is a thermosetting resin, heat may be applied to cure the curable resin.

On the other hand, the first lens 202 has an example that the image surface 202a is flat, but the method of the present embodiment can be applied even when the image surface is concave.

In addition, since the second lens 208 is selected so that the resin has a dispersibility to correct chromatic aberration of the first lens 202, the imaging lens 200 manufactured according to the above method obtains an image from which chromatic aberration is removed. do.

By applying the lens manufacturing method of the present invention, a plurality of imaging lenses can be produced at one time.

That is, after arranging a plurality of pre-fabricated first lenses 12 and 202 in one tray or plate, the second lenses 22a and 208 are made according to any one of the first, second and fifth embodiments described above. ) May be integrated with the first lenses 12 and 202 to manufacture the imaging lenses 10, 10A, and 200. Further, after arranging a plurality of first lenses 102 made in advance on a tray or plate, the intermediate lenses 112a may be replaced with the first and second lenses 102; 114, according to the third or fourth embodiment described above. The imaging lenses 100 and 100A can be manufactured by integrating with 114a).

Therefore, there is an advantage that can easily and precisely manufacture a plurality of imaging lenses.

As described above, according to the present invention, an optical axis therebetween can be precisely aligned by adding a curable material to a prefabricated lens to form a second lens to be paired with the lens. In addition, the optical axis therebetween can be precisely aligned by injecting a curable material into the space between the first and second lenses prepared in advance to form an intermediate lens.

In addition, a plurality of imaging lenses may be manufactured at a time by arranging a plurality of prefabricated lenses in one plate and injecting a curable material into each lens to form a second or intermediate lens that is paired with these lenses.

Although the above has been described with reference to the preferred embodiments of the present invention, those skilled in the art may vary the present invention without departing from the spirit and scope of the present invention as set forth in the claims below. It will be understood that modifications and variations can be made.

Claims (15)

delete delete Preparing a first lens; Coupling a die engraved in a lens shape to be paired with the first lens to one surface of the first lens; Filling a curable resin into a space between the first lens and the formwork; Curing the curable resin to form a second lens integrated with the first lens; And Lens manufacturing method using a curable resin comprising the step of removing the formwork. Preparing a first lens; Preparing a curable resin having a predetermined viscosity and surface tension; Discharging the curable resin to one surface of the first lens by a predetermined amount to form a lens shape having a predetermined surface curvature while being paired with the first lens; And And curing the discharged curable resin to form a second lens integrated with the first lens. Preparing and arranging a plurality of first lenses on a plate; And A method of manufacturing a lens comprising the step of forming a second lens by the method according to claim 3. The method of claim 5, wherein the curing step uses heat or ultraviolet rays. The method of claim 5, wherein the curable resin has a dispersibility for correcting chromatic aberration of the first lens. The lens manufacturing method according to claim 3 or 4, wherein the curable resin has a dispersibility for correcting chromatic aberration of the first lens. Preparing a first lens; Pouring curable resin into a space formed on one surface of the first lens; An intermediate lens shape paired with the first and second lenses by preparing a second lens engraved into a lens shape paired with the first lens and covering the second lens with the curable resin on one surface of the first lens; Obtaining; And And curing the curable resin of the intermediate lens shape to form an intermediate lens integrated with the first and second lenses. Preparing a first lens; Coupling a second lens engraved into a lens shape that is paired with the first lens to one surface of the first lens; Filling the curable resin into a space between the first lens and the second lens; And And curing the curable resin to form an intermediate lens integrated with the first and second lenses. Preparing and arranging a plurality of first lenses on a plate; And A method of manufacturing a lens comprising forming an intermediate lens by the method according to claim 9. The method of claim 11, wherein the curing step uses heat or ultraviolet rays. 12. The lens manufacturing method according to claim 11, wherein the curable resin has a dispersion ability to correct chromatic aberration of the first and second lenses. The lens manufacturing method according to claim 9 or 10, wherein the curable resin has a dispersibility for correcting chromatic aberration of the first and second lenses. A method according to any one of claims 3, 4, 9 and 10, wherein the curing step uses heat or ultraviolet light.

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