KR20140076761A - Lens module - Google Patents

Lens module Download PDF

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Publication number
KR20140076761A
KR20140076761A KR1020120145166A KR20120145166A KR20140076761A KR 20140076761 A KR20140076761 A KR 20140076761A KR 1020120145166 A KR1020120145166 A KR 1020120145166A KR 20120145166 A KR20120145166 A KR 20120145166A KR 20140076761 A KR20140076761 A KR 20140076761A
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KR
South Korea
Prior art keywords
lens
lens barrel
adhesive
groove
barrel
Prior art date
Application number
KR1020120145166A
Other languages
Korean (ko)
Inventor
박주성
Original Assignee
삼성전기주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 삼성전기주식회사 filed Critical 삼성전기주식회사
Priority to KR1020120145166A priority Critical patent/KR20140076761A/en
Publication of KR20140076761A publication Critical patent/KR20140076761A/en

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
    • G02B7/021—Mountings, adjusting means, or light-tight connections, for optical elements for lenses for more than one lens
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
    • G02B7/022—Mountings, adjusting means, or light-tight connections, for optical elements for lenses lens and mount having complementary engagement means, e.g. screw/thread
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
    • G02B7/023—Mountings, adjusting means, or light-tight connections, for optical elements for lenses permitting adjustment
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
    • G02B7/025—Mountings, adjusting means, or light-tight connections, for optical elements for lenses using glue
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B17/00—Details of cameras or camera bodies; Accessories therefor
    • G03B17/02—Bodies
    • G03B17/12—Bodies with means for supporting objectives, supplementary lenses, filters, masks, or turrets

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Lens Barrels (AREA)

Abstract

A lens barrel of the present invention includes: a first lens barrel accommodating at least one first lens; And a second lens barrel receiving at least one second lens and engaging with the first lens barrel, wherein grooves for filling the adhesive are formed on one surface of the second lens barrel facing the first lens barrel .

Description

A lens module {Lens module}

The present invention relates to a lens module, and more particularly, to a lens module capable of precisely adjusting the position of an object-side lens.

In general, it is very important to align the optical axis of the lens with the lens module composed of a plurality of lenses. For this reason, the assembling process of the lens module includes a step of aligning the optical axis of the lens with the lens (commonly referred to as a careful adjustment). In addition, the lens module has a structure capable of adjusting the optical axis between the lens and the lens, and at least one lens is fixed to the lens barrel by an adhesive.

However, since the conventional lens module does not provide a sufficient adhesion space between the lens to be adjusted and the lens barrel, a phenomenon (hereinafter referred to as post-distortion) in which the optical axes between the lenses are discordant due to an external impact may occur.

In addition, since the conventional lens module has a structure for filling or injecting the adhesive after performing the alignment adjustment of the lens, there is a possibility that the position of the lens may be changed during filling and injecting of the adhesive.

In addition, since the conventional lens module does not completely block the entrance of the adhesive filled between the lens barrel and the lens barrel into the lens barrel, the optical surface of the lens may be contaminated with the adhesive.

On the other hand, Patent Documents 1 and 2 are the prior art related to the present invention. Patent Document 1 discloses a technique of forming a space in which an adhesive agent 5 can be applied between a holding member 4 and a holder 1 to firmly couple the holder member 4 and the holder 1. Patent Document 2 discloses a technique of forming a protrusion 7 on the lens holder 1 to adjust the angle of the lens.

However, Patent Document 1 has a disadvantage in that it can not provide sufficient space between the holding member 4 and the holder 1 to fill the adhesive, and Patent Document 2 discloses a disadvantage that the optical surface of the lens may be contaminated by the adhesive .

KR 2007-026054 A JP 2007-087511 A

SUMMARY OF THE INVENTION It is an object of the present invention to provide a lens module capable of stable and careful adjustment of a lens.

It is another object of the present invention to provide a lens module that can completely block the phenomenon that an adhesive is introduced between a lens and a lens barrel.

According to an aspect of the present invention, there is provided a lens module comprising: a first lens barrel accommodating at least one first lens; And a second lens barrel receiving at least one second lens and engaging with the first lens barrel, wherein grooves for filling the adhesive are formed on one surface of the second lens barrel facing the first lens barrel .

In the lens module according to an embodiment of the present invention, protrusions that fit into the grooves may be formed on one surface of the first lens barrel.

In the lens module according to an embodiment of the present invention, the groove may include a first groove into which the first adhesive is injected and a second groove into which the second adhesive is injected.

In the lens module according to an embodiment of the present invention, the first groove may be formed deeper than the second groove.

In the lens module according to an embodiment of the present invention, the first adhesive may be a thermosetting adhesive, and the second adhesive may be an instant adhesive.

According to another aspect of the present invention, there is provided a lens module comprising: a first lens barrel accommodating at least one first lens; And a second lens barrel receiving at least one second lens and engaging with the first lens barrel, wherein an adhesive agent is provided between the first lens barrel and the second lens barrel on one surface of the second lens barrel A first peripheral wall for separating the first lens and the second lens from each other so that the first lens and the second lens are not in contact with each other can be formed.

In the lens module according to another embodiment of the present invention, a second peripheral wall may be formed on one surface of the second lens barrel to prevent overflow of the adhesive.

In the lens module according to another embodiment of the present invention, protrusions protruding into the space between the first peripheral wall and the second peripheral wall may be formed on one surface of the first lens barrel.

In the lens module according to another embodiment of the present invention, a first groove and a second groove having different depths may be formed in a space between the first peripheral wall and the second peripheral wall.

In the lens module according to another embodiment of the present invention, a first adhesive may be injected into the first groove, and a second adhesive may be injected into the second groove.

In the lens module according to another embodiment of the present invention, the first adhesive may be a thermosetting adhesive, and the second adhesive may be an instant adhesive.

In the lens module according to another embodiment of the present invention, a light shielding member may be mounted between the first lens and the second lens.

The present invention provides sufficient space for the adhesive to be injected, so that it is possible to effectively prevent the optical axis mismatch between the lenses due to post-distortion.

In addition, since the first lens and the second lens are not in contact with each other, the shape of the light shielding member mounted between the first lens and the second lens is damaged due to the alignment adjustment for adjusting the position of the first lens, There is no problem that the position of the member is changed.

1 is a cross-sectional view of a lens module according to a first embodiment of the present invention,
2 is an enlarged view of a portion A shown in Fig. 1,
Fig. 3 is a plan view of the second lens barrel shown in Fig. 1,
4 is a sectional view taken along the line BB of the second lens barrel shown in Fig. 3,
FIG. 5 is a plan view showing a position where an adhesive is injected into the second lens barrel shown in FIG. 1,
6 is a cross-sectional view of a lens module according to a second embodiment of the present invention,
FIG. 7 is an enlarged view of a portion C shown in FIG. 6,
8 is a plan view of the second lens barrel shown in Fig. 6,
Fig. 9 is a DD sectional view of the second lens barrel shown in Fig. 8,
10 is a plan view showing positions where an adhesive is injected into the second lens barrel shown in FIG.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

In describing the present invention, it is to be understood that the terminology used herein is for the purpose of describing the present invention only and is not intended to limit the technical scope of the present invention.

FIG. 1 is a sectional view of a lens module according to a first embodiment of the present invention, FIG. 2 is an enlarged view of a portion A shown in FIG. 1, FIG. 3 is a plan view of a second lens barrel shown in FIG. 4 is a cross-sectional view taken along the line BB of the second lens barrel shown in FIG. 3, FIG. 5 is a plan view showing a position where the adhesive is injected into the second lens barrel shown in FIG. 1, 6 is an enlarged view of the portion C shown in Fig. 6, Fig. 8 is a plan view of the second lens barrel shown in Fig. 6, and Fig. 9 is a cross- And FIG. 10 is a plan view showing a position where the adhesive is injected into the second lens barrel shown in FIG.

1 to 5, a lens module according to a first embodiment of the present invention will be described.

The lens module 100 according to the present embodiment may include a first lens barrel 110, a second lens barrel 120, a first lens 130, and a second lens 140. In addition, the lens module 100 according to the present embodiment may include adhesives 150 and 160 for bonding the first lens barrel 110 and the second lens barrel 120 together. Here, the adhesives 150 and 160 may be made of different kinds of adhesives. That is, the adhesives 150 and 160 may be composed of the first adhesive 150 and the second adhesive 160.

The first lens barrel 110 is formed in a disc shape and can accommodate one or more lenses. In other words, the first lens barrel 110 may have a hole through which the effective light is incident, and one or more first lenses 130 may be attached or attached to the hole of the first lens barrel 110. In the drawings, one first lens 130 is shown mounted on the first lens barrel 110. However, if necessary, two or more first lenses 130 Can be mounted.

The first lens barrel 110 can engage with the second lens barrel 120. To this end, one surface of the first lens barrel 110 (as viewed in FIG. 1) may be substantially coincident with one surface (upper surface in FIG. 1) of the second lens barrel 120. In other words, the first lens barrel 110 may have a structure that interlocks with the second lens barrel 120. However, the first lens barrel 110 and the second lens barrel 120 do not completely coincide with one side of the first lens barrel 110 and one side of the second lens barrel 120, A space can be formed.

A projection 112 may be formed on one surface of the first lens barrel 110 as shown in FIG. The protrusion 112 may be formed at the edge of the first lens barrel 110 and may extend toward the lower side of the first lens barrel 110. In other words, the protrusion 112 extends downward from one surface of the first lens barrel 110 and can be fitted into the groove 122 formed on one surface of the second lens barrel 120. Here, the protrusion 112 is fitted in the groove 122, which means that the protrusion 112 is spatially positioned in the groove 122 and that the protrusion 112 and the groove 122 are in physical contact with each other It does not. 2, a space through which the adhesives 150 and 160 can be injected may be formed between the protrusions 112 and the grooves 122 even when the protrusions 112 are fitted in the grooves 122 . For reference, the protrusion 112 of the first lens barrel 110 may be omitted if necessary.

The second lens barrel 120 may have a cylindrical shape capable of accommodating a plurality of lenses. In other words, the second lens barrel 120 may have a cylindrical shape that is opened up and down, and may accommodate one or more second lenses 140 therein. Here, the second lens barrel 120 may have a larger volume than the first lens barrel 110. Therefore, lenses larger than the first lens barrel 110 can be mounted on the second lens barrel 120. [ In the drawings, one second lens 140 is shown mounted on the second lens barrel 120. However, if necessary, two or more second lenses 140 Can be mounted. For example, three or more second lenses 140 may be mounted on the second lens barrel 120.

The second lens barrel 120 can be engaged with the first lens barrel 110. To this end, one surface (upper surface in FIG. 1) of the second lens barrel 120 may be shaped to substantially conform to one surface (in terms of FIG. 1) of the first lens barrel 110. In other words, the second lens barrel 120 may have a structure in which the first lens barrel 110 and the second lens barrel 110 are interlocked with each other. However, one surface of the second lens barrel 120 and the one surface of the first lens barrel 110 do not completely coincide with each other, and one surface of the first lens barrel 120 and one surface of the first lens barrel 110, A predetermined space may be formed.

A groove 122 may be formed on one surface of the second lens barrel 120. A groove 122 capable of receiving the projection 112 of the first lens barrel 110 may be formed on one surface of the second lens barrel 120. [ Here, the size of the groove 122 may be larger than that of the projection 112. The depth of the groove 122 may be greater than the height of the protrusion 112 and the width of the groove 122 may be greater than the width of the protrusion 112. In other words, Therefore, even when the projections 112 are fitted in the grooves 122 by the engagement of the first lens barrel 110 and the second lens barrel 120, adhesives 150 and 160 Can be injected.

The groove 122 may have a constant width along the edge of the second lens barrel 120 and may be generally annular. Thus, the adhesive 150, 160 can be injected at one side of the second lens barrel 120 so that the injected adhesive 150, 160 can spread along the groove 122 to a substantially uniform thickness. On the other hand, the groove 122 may have a sufficient depth to prevent the adhesive 150, 160 from overflowing.

The groove 122 may be formed of a first groove 1222 and a second groove 1224 as shown in FIGS. Here, the first groove 1222 may be formed deeper than the second groove 1224. In addition, the first grooves 1222 may be partially formed at predetermined intervals in the annular groove 122 as shown in FIG. That is, the size of the region where the first groove 1222 is formed may be smaller than the size of the region where the second groove 1224 is formed.

The first lens 130 may be mounted on the first lens barrel 110. The first lens 130 may be a lens disposed closer to the object side in the lens module 100. That is, the first lens 130 may be a lens that is exposed toward the object side. The first lens 130 may have a positive refractive power. However, it can have a negative refractive power if necessary. The first lens 130 may be a concave, convex or meniscus lens. However, the shape of the first lens 130 is not particularly limited to the above-described shape. For example, the first lens 130 may be a cemented lens formed by bonding a concave lens and a convex lens. For reference, the first lens 130 may be made of a plastic material or a glass material.

The second lens 140 may be mounted on the second lens barrel 120. The second lens 140 may be a lens that is relatively close to the image sensor in the lens module 100. The second lens 140 may have a positive refractive power. However, it can have a negative refractive power if necessary. The second lens 140 may be a concave, convex or meniscus lens. However, the shape of the second lens 140 is not particularly limited to the above-described shape.

The second lens 140 may be formed of a plurality of lenses. For example, the second lens 140 may be composed of a lens having a negative refracting power, a lens having a positive refracting power, and a lens having a negative refracting power. However, the second lens 140 is not limited to three lenses, and may be composed of two or four lenses as required. For reference, the second lens 140 may be made of a plastic material or a glass material, like the first lens 130.

The adhesives 150 and 160 may be made of different kinds of adhesives. The adhesives 150 and 160 may include a first adhesive 150 used to temporarily fix the position of the first lens 130 and a second adhesive 150 used to completely fix the position of the first lens 130 160). Here, the first adhesive 150 may be a thermosetting adhesive whose curing time is relatively long and adjustable, and the second adhesive 160 may be an instant adhesive having a relatively short curing time. Accordingly, the first adhesive 150 can be used in adjusting the relative position of the first lens 130 relative to the second lens 140 (i.e., the caution adjusting step), and the second adhesive 160 can be used

The adhesive 150, 160 may be injected into the groove 122 of the second lens barrel 120. In other words, the first adhesive 150 can be injected into the first groove 1222 and the second adhesive 160 can be injected into the second groove 1224.

In the lens module 100 thus configured, the first lens 130 can be carefully adjusted while the first adhesive 150 is injected into the first groove 1222. That is, since the first groove 1222 occupies a considerably small area in the groove 122 as described above, the first lens barrel 110 and the second lens barrel 120 may not be firmly joined. Accordingly, after the first adhesive agent 150 is injected into the first groove 1222, the position of the first lens barrel 110 with respect to the second lens barrel 120 is adjusted so that the distance between the first lens 130 and the second lens barrel 120 The optical axis of the lens 140 can be aligned. Thereafter, the second adhesive 160 is injected into the second groove 1224 to firmly bond the first lens barrel 110 and the second lens barrel 120 together. Here, since the second groove 1224 is relatively wide and wide, the second adhesive 160 necessary for bonding the first lens barrel 110 and the second lens barrel 120 can be sufficiently injected.

The first adhesive 150 injected during the alignment of the first lens 130 is injected into the relatively deep first groove 1222 so that it flows over the lens in the alignment step of the first lens 130, Or does not flow out of the lens barrel. The second adhesive 160 used to fix the position of the first lens 130 is hardened within a short time as described above to fix the positions of the first lens barrel 110 and the second lens barrel 120 (Post-distortion) in which the optical axes between the lenses are discordant due to an external impact can be effectively prevented.

Therefore, according to the present embodiment, not only the careful adjustment of the lens module 100 is easy, but also the quality deterioration of the lens module 100 due to the post-distortion can be effectively prevented.

In addition, since the present embodiment uses an adhesive having different hardening speeds in the step of adjusting the alignment of the lens and the step of fixing the position of the lens, the production speed of the lens module 100 can be improved.

Hereinafter, a lens module according to a second embodiment of the present invention will be described with reference to FIGS. 6 to 10. FIG. For reference, the same constituent elements as those of the above-described embodiment in the description of the second embodiment use the same reference numerals as those in the above-described embodiment, and a detailed description of these constituent elements is omitted.

The lens module 100 according to the present embodiment can be distinguished from the above-described embodiment in that the first peripheral wall 122 and the second peripheral wall 124 are formed in the second lens barrel 120. The grooves 122 into which the adhesives 150 and 160 are injected may be a space surrounded by the first peripheral wall 124 and the second peripheral wall 126. [ The first circumferential wall 124 may hold the first lens barrel 110 upward (reference to FIG. 6) so that the first lens 130 and the second lens 140 do not contact each other.

In the lens module 100 thus configured, the first lens 130 and the second lens 140 may not be in contact with each other as described above. The position of the light shielding member 170 attached to the second lens 140 may be changed by the movement of the first lens 130 or the position of the light shielding member 170 may be changed It is possible to effectively reduce the phenomenon of being damaged due to contact with the first lens 130. [

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 inventions And various modifications may be made.

100 lens module
110 first lens barrel
112 protrusion
120 Second lens barrel
122 Home
124 First circumference
126 Second circumference
130 first lens
140 Second lens
150 first adhesive
160 second adhesive
170 shielding member

Claims (12)

A first lens barrel accommodating at least one first lens; And
A second lens barrel receiving at least one second lens and engaging with the first lens barrel;
Lt; / RTI >
And a groove filled with an adhesive is formed on one surface of the second lens barrel facing the first lens barrel. The method according to claim 1,
And a projection which is fitted in the groove is formed on one surface of the first lens barrel. The method according to claim 1,
Wherein the groove includes a first groove into which a first adhesive is injected and a second groove into which a second adhesive is injected. The method of claim 3,
Wherein the first groove is formed deeper than the second groove. The method of claim 3,
Wherein the first adhesive is a thermosetting adhesive,
Wherein the second adhesive is an instant adhesive. A first lens barrel accommodating at least one first lens; And
A second lens barrel receiving at least one second lens and engaging with the first lens barrel;
Lt; / RTI >
On one surface of the second lens barrel,
A first peripheral wall for spacing an adhesive between the first lens barrel and the second lens barrel and spaced apart from the first lens and the second lens such that the first lens and the second lens are not in contact with each other, A formed lens barrel. The method according to claim 6,
And a second peripheral wall for preventing overflow of the adhesive is formed on one surface of the second lens barrel. 8. The method of claim 7,
And a projection protruding into a space between the first peripheral wall and the second peripheral wall is formed on one surface of the first lens barrel. 8. The method of claim 7,
And a first groove and a second groove having different depths are formed in a space between the first peripheral wall and the second peripheral wall. 10. The method of claim 9,
A first adhesive is injected into the first groove,
And a second adhesive is injected into the second groove. 11. The method of claim 10,
Wherein the first adhesive is a thermosetting adhesive,
Wherein the second adhesive is an instant adhesive. The method according to claim 6,
And a light blocking member is mounted between the first lens and the second lens.
KR1020120145166A 2012-12-13 2012-12-13 Lens module KR20140076761A (en)

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