KR101626551B1 - Lens module - Google Patents

Lens module Download PDF

Info

Publication number
KR101626551B1
KR101626551B1 KR1020090083043A KR20090083043A KR101626551B1 KR 101626551 B1 KR101626551 B1 KR 101626551B1 KR 1020090083043 A KR1020090083043 A KR 1020090083043A KR 20090083043 A KR20090083043 A KR 20090083043A KR 101626551 B1 KR101626551 B1 KR 101626551B1
Authority
KR
South Korea
Prior art keywords
lens
module
refractive power
lens module
positive refractive
Prior art date
Application number
KR1020090083043A
Other languages
Korean (ko)
Other versions
KR20110024872A (en
Inventor
정혜정
Original Assignee
엘지이노텍 주식회사
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 엘지이노텍 주식회사 filed Critical 엘지이노텍 주식회사
Priority to KR1020090083043A priority Critical patent/KR101626551B1/en
Publication of KR20110024872A publication Critical patent/KR20110024872A/en
Application granted granted Critical
Publication of KR101626551B1 publication Critical patent/KR101626551B1/en

Links

Images

Abstract

The present invention relates to a lens module, and more particularly, to a lens module suitable for a camera module using a high-resolution image sensor and having a plurality of lenses to reduce the sensitivity.
A lens module of the present invention comprises, in order from an object side, a first lens having a positive refractive power; A second lens having a negative refractive power; A third lens having positive refractive power; A fourth lens having positive refractive power; A fifth lens having positive refractive power; And a sixth lens having negative refracting power, wherein the fourth lens is formed such that the object side surface is convex.
Lens, imaging

Description

LENS MODULE {LENS MODULE}
The present invention relates to a lens module, and more particularly, to a lens module suitable for a camera module using a high-resolution image sensor and having a plurality of lenses to reduce the sensitivity.
Recently, a camera module for a communication terminal, a digital still camera (DSC), a camcorder, a PC camera (an image pickup device attached to a personal computer), and the like have been studied in connection with an image pick-up system . A most important component for obtaining an image of a camera module related to such an image pickup system is a lens module having a plurality of lens modules for imaging an image.
Attempts have been made to construct a high-resolution lens module using five lenses. Each of the five lenses is composed of a lens having a positive refractive power and a lens having a negative refractive power. For example, the lens module is constructed in the order of PNNPN (+ - + -), PNPNN (+ - + -), or PPNPN (++ - + -) from the object side. However, the lens module having such a structure does not exhibit satisfactory optical characteristics or aberration characteristics in some cases, and a high-resolution lens module having a new power structure is required.
An object of the present invention is to provide a lens module having a new power structure in which the number of lenses is increased, and to provide a lens module having a characteristic of reducing a flare phenomenon and reducing sensitivity and having aberration characteristics.
In particular, it is an object of the present invention to provide a lens module that improves the performance of the lens module as the pixel size of the image sensor becomes smaller.
According to an aspect of the present invention, there is provided a lens module comprising: a first lens having, in order from an object side, a positive refractive power; A second lens having a negative refractive power; A third lens having positive refractive power; A fourth lens having positive refractive power; A fifth lens having positive refractive power; And a sixth lens having negative refracting power, wherein the fourth lens is formed such that the object side surface is convex.
In the lens module of the present invention, at least one of the object side surface and the image side surface of the first lens to the sixth lens is an aspherical surface.
In the lens module of the present invention, the fifth lens is concave on the object side.
In the lens module of the present invention, the sixth lens is formed so that the object side surface is convex.
In the lens module of the present invention, the sixth lens has inflection points on both the object side and the upper side.
In the lens module of the present invention, when the total focal length of the lens module is f and the focal length of the first lens is f1, 0.5 <f1 / f <1.5 is satisfied.
In the lens module of the present invention, when the Abbe number of the second lens is V2 and the Abbe number of the third lens is V3, 20 <V2 and V3 <30 are satisfied.
In the lens module of the present invention, when the Abbe number of the fourth lens is V4, the Abbe number of the fifth lens is V5, and the Abbe number of the sixth lens is V6, 50 <V4, V5, Is satisfied.
Further, in the lens module of the present invention, when the total focal length of the lens module is denoted by f and the total thickness of the lens module is denoted by d, 0.5 <d / f <1.5 is satisfied.
In the lens module of the present invention, when the focal length of the first lens is f1 and the focal length of the second lens is f2, the conditional expression | f2 / f1 |> 1 is satisfied.
The lens module according to the present embodiment is characterized in that the first lens and the third lens to the fifth lens have a positive power and the second lens and the sixth lens are formed of a lens having a negative power The lens module is a power structure of the PNPPPN.
Further, the fourth lens can be realized with a lens module in which the object side is convex so that the flare phenomenon is reduced and the sensitivity is reduced while the aberration characteristic is excellent.
While the invention is susceptible to various modifications and alternative forms, specific embodiments thereof are shown by way of example in the drawings and will herein be described in detail. It should be understood, however, that the invention is not intended to be limited to the particular embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.
Terms including ordinals, such as first, second, etc., may be used to describe various elements, but the elements are not limited to these terms. The terms are used only for the purpose of distinguishing one component from another.
For example, without departing from the scope of the present invention, the second component may be referred to as a first component, and similarly, the first component may also be referred to as a second component.
It is to be understood that when an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, . On the other hand, when an element is referred to as being "directly connected" or "directly connected" to another element, it should be understood that there are no other elements in between.
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", "having", and the like are used to specify that a feature, a number, a step, an operation, an element, a component, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.
Hereinafter, a lens module according to an embodiment of the present invention will be described in detail with reference to the drawings, and the same or corresponding components are denoted by the same reference numerals regardless of the reference numerals, and redundant explanations thereof are omitted.
Fig. 1 is a configuration diagram of a camera lens module according to the present embodiment, and is a side view showing an arrangement state of lenses around an optical axis Z0. In the configuration diagram of Fig. 1, the thickness, size, and shape of the lens are shown somewhat exaggerated for explanatory purposes, and the spherical or aspherical shape is not limited to this shape, but only one embodiment.
 1, a camera lens module according to the present invention includes a first lens 10, a second lens 20, a third lens 30, a fourth lens 40, a fifth lens 40, 50, a sixth lens 60, a filter 70, and a light receiving element 80 are arranged.
The light corresponding to the image information of the object is incident on the first lens 10, the second lens 20, the third lens 30, the fourth lens 40, the fifth lens 50, the sixth lens 60 And the filter 70 and is incident on the light receiving element 80. [
The term " object side surface "refers to a surface of the lens facing the object side with respect to the optical axis, and" upper surface " Means the face of the lens.
The first lens 10 has a positive refractive power, and the object side surface S1 is convex. The object-side surface S1 of the first lens 10 may serve as a diaphragm. In this case, the lens module of this embodiment does not require a separate diaphragm. The second lens 20 has a negative refracting power and the object side surface S3 is convex.
The third lens 30, the fourth lens 40 and the fifth lens 50 have a positive refractive power and the sixth lens 60 has a negative refractive power. As shown in the figure, the third lens 30 is in the form of a meniscus in which the object side surface S5 is formed convexly. The refractive power of the third lens 30 is formed to be smaller than the refractive power of the remaining lenses. The third lens 30 is formed so that the object side surface S5 is convex so that the flare phenomenon in which the image is spread is reduced and the sensitivity of the lens is reduced.
The first lens 10, the second lens 20, the third lens 30, the fourth lens 40, the fifth lens 50, and the sixth lens 60 have at least an object- Any one surface may be formed of an aspheric surface, but the present invention is not limited thereto. Both surfaces may be provided with aspherical surfaces.
Here, the sixth lens 60 is an aspherical shape in which both the object side surface S11 and the upper side surface S12 have inflection points. As shown in the figure, the upper surface S12 of the sixth lens 60 is bent upward toward the periphery from the central portion with the optical axis Z0 as its center, and again, at the peripheral portion away from the optical axis Z0, It is bent toward the object side to form an aspheric inflection point.
The aspheric inflection point formed in the sixth lens 60 can adjust the maximum emission angle of the principal ray incident on the light receiving element 70. The aspherical surface inflection point formed on the object side surface S11 and the upper surface S12 of the sixth lens 60 adjusts the maximum projection angle of the principal ray to prevent the shadow of the peripheral portion of the screen from becoming shaded.
The filter 70 is at least one of an infrared filter, an optical filter such as a cover glass, and the like. When the infrared filter is applied as the filter 70, the radiant heat emitted from the external light is blocked from being transmitted to the light receiving element 80. In addition, the infrared ray filter transmits visible light, and the infrared ray reflects the infrared ray to the outside.
The light receiving element 80 is an image sensor such as a CCD (Charge Coupled Device) or a CMOS (Complementary Metal Oxide Semiconductor).
The first lens 10, the second lens 20, the third lens 30, the fourth lens 40, the fifth lens 50, and the sixth lens 60, as in the following embodiments, By using a lens having at least one surface or both surfaces of an aspherical surface, it is possible to improve the resolving power of the lens and to take advantage of the excellent aberration characteristics.
It will be apparent to those skilled in the art that the conditional expressions and embodiments described below are preferred embodiments for increasing the operating effect, and that the present invention is not necessarily constituted by the following conditions. For example, the lens configuration of the present invention may have an elevated action effect even if only the conditional formulas of some of the conditional expressions described below are satisfied.
[Conditional expression 1]
0.5 < f1 / f < 1.5
[Conditional expression 2]
20 < V2, V3 < 30
[Conditional expression 3]
50 < V4, V5, V6 < 60
[Conditional expression 4]
0.5 < d / f < 1.5
[Conditional expression 5]
| F2 / f1 | > 1
here,
f: Overall focal length of lens module
f1: focal length of the first lens
V1 to V6: Abbe number of the first to sixth lenses
d: Overall thickness of the lens module
.
Conditional expression 1 defines the refractive power of the first lens 10. The first lens 10 has a refractive power with proper chromatic aberration and correction of the appropriate spherical aberration according to the conditional expression (1). Conditions 2 and 3 define the Abbe number of each lens. The definition of the refractive index and Abbe number of each lens is a condition for satisfactorily correcting the chromatic aberration. The conditional expression 5 is a condition capable of downsizing the lens module while correcting the magnification and the abstract chromatic aberration.
Hereinafter, the operation and effect of the present invention will be described with reference to specific examples. Conic constants k mentioned in the following examples and 'E and the numbers following' used in the aspherical coefficients A, B, C, D, E and F indicate powers of ten. For example, E + 01 represents 10 1 and E-02 represents 10 -2 .
[Example]
[Table 1]
Face number The radius of curvature (R) Thickness (d) Refractive index (N)
One* 4.06 1.00 1.53
2* -2.49 0.20
3 * 9.04 0.43 1.61
4* 1.97 0.38
5 * 111.8 0.43 1.61
6 * -111.4 0.36
7 * -5.60 0.48 1.53
8* -5.00 0.20
9 * -4.12 0.86 1.53
10 * -1.14 0.20
11 * 6.96 0.52 1.53
12 * 1.07 0.65
13 0.00 0.30 1.52
14 0.00 0.56
Image 0.00 0.00
In Table 1, the symbol * next to the surface number indicates an aspherical surface.
The embodiment of Table 1 is a concrete example of Conditional Expressions 1 to 5, and the values of the aspherical surface coefficients of the respective lenses in the embodiment of Table 1 are shown in Table 2 below.
[Table 2]
Figure 112009054383893-pat00001
FIG. 2 is a graph showing aberration diagrams according to the above embodiment. FIG. 2 is a graph showing longitudinal spherical aberration, astigmatic field curves, and distortion in order from the left.
In Fig. 2, the Y axis means the size of the image, and the X side means the focal length (in mm) and the distortion degree (in%). In FIG. 2, as the curves approach the Y-axis, the aberration correction function is considered to be better. In the illustrated aberration diagrams, since the values of the images are adjacent to the Y axis in almost all fields, spherical aberration, astigmatism, and distortion aberration are all excellent values.
FIG. 3 is a graph of coma aberration, and FIG. 3 is a graph showing a tangential aberration and a sagittal aberration of each wavelength according to the height of the top surface. In FIG. 3, as the graph showing the experimental results is closer to the X axis on the positive axis and the negative axis, it is interpreted that the coma aberration correction function is good. The measurement examples of FIG. 3 are interpreted as showing superior coma aberration correction functions because the values of the images appear near the X axis in almost all fields.
While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those skilled in the art that various changes and modifications may be made therein without departing from the spirit and scope of the invention. You will understand. Accordingly, it is intended that the present invention covers all embodiments falling within the scope of the following claims, rather than being limited to the above-described embodiments.
1 is a configuration diagram of a lens module according to the present embodiment.
2 is a graph showing aberration characteristics according to an embodiment of the present invention.
3 is a graph showing coma aberration according to an embodiment of the present invention.

Claims (10)

  1. In order from the object side,
    A first lens having positive refractive power;
    A second lens having a negative refractive power;
    A third lens having positive refractive power;
    A fourth lens having positive refractive power;
    A fifth lens having positive refractive power; And
    And a sixth lens having a negative refractive power,
    Wherein the fourth lens and the sixth lens are convex on the object side.
  2. The method according to claim 1,
    Wherein the first lens to the sixth lens are aspherical surfaces on at least one side or both sides of the object side surface and the upper side surface.
  3. The method according to claim 1,
    And the fifth lens has a concave surface on the object side.
  4. delete
  5. 5. The method of claim 4,
    And the sixth lens has an inflection point on both the object side surface and the image side surface.
  6. The method according to claim 1,
    When the total focal length of the lens module is f and the focal length of the first lens is f1,
    0.5 < f1 / f < 1.5
    Lt; / RTI &gt;
  7. The method according to claim 1,
    When the Abbe number of the second lens is V2 and the Abbe number of the third lens is V3,
    20 < V2, V3 < 30
    Lt; / RTI &gt;
  8. The method according to claim 1,
    When the Abbe number of the fourth lens is V4, the Abbe number of the fifth lens is V5, and the Abbe number of the sixth lens is V6,
    50 < V4, V5, V6 < 60
    Lt; / RTI &gt;
  9. The method according to claim 1,
    The total focal length of the lens module is f, and the total thickness of the lens module, which is the distance from the object-side incident surface of the first lens to the image surface,
    0.5 < d / f < 1.5
    Lt; / RTI &gt;
  10. The method according to claim 1,
    When the focal length of the first lens is f1 and the focal length of the second lens is f2,
    | F2 / f1 | > 1
    Lt; / RTI &gt;
KR1020090083043A 2009-09-03 2009-09-03 Lens module KR101626551B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020090083043A KR101626551B1 (en) 2009-09-03 2009-09-03 Lens module

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020090083043A KR101626551B1 (en) 2009-09-03 2009-09-03 Lens module

Related Child Applications (1)

Application Number Title Priority Date Filing Date
KR1020160064366A Division KR101803869B1 (en) 2016-05-25 2016-05-25 Lens module

Publications (2)

Publication Number Publication Date
KR20110024872A KR20110024872A (en) 2011-03-09
KR101626551B1 true KR101626551B1 (en) 2016-06-01

Family

ID=43932645

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020090083043A KR101626551B1 (en) 2009-09-03 2009-09-03 Lens module

Country Status (1)

Country Link
KR (1) KR101626551B1 (en)

Families Citing this family (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI435138B (en) 2011-06-20 2014-04-21 Largan Precision Co Optical imaging system for pickup
KR101364975B1 (en) * 2012-03-19 2014-02-20 주식회사 코렌 Photographic lens optical system
WO2013145547A1 (en) 2012-03-26 2013-10-03 富士フイルム株式会社 Imaging lens and imaging device provided with imaging lens
KR101450287B1 (en) * 2012-09-05 2014-10-22 삼성전기주식회사 Lens module
JP5764622B2 (en) 2012-09-05 2015-08-19 サムソン エレクトロ−メカニックス カンパニーリミテッド. Lens module
US9348112B2 (en) 2012-09-05 2016-05-24 Samsung Electro-Mechanics Co., Ltd. Optical system
US9429736B2 (en) 2012-09-10 2016-08-30 Samsung Electro-Mechanics Co., Ltd. Optical system
KR101452045B1 (en) 2012-10-25 2014-10-21 삼성전기주식회사 Optical System
US9411130B2 (en) 2012-12-04 2016-08-09 Samsung Electronics Co., Ltd. Photographing lens and electronic apparatus
JP6033658B2 (en) * 2012-12-04 2016-11-30 三星電子株式会社Samsung Electronics Co.,Ltd. Imaging lens
TWI487944B (en) * 2012-12-28 2015-06-11 Largan Precision Co Ltd Optical imaging lens assembly
KR101989157B1 (en) * 2012-12-31 2019-09-30 삼성전자주식회사 Photographing lens and photographing apparatus
KR101539845B1 (en) * 2013-06-25 2015-07-27 삼성전기주식회사 Lens module
KR102063899B1 (en) 2013-07-10 2020-01-08 삼성전자주식회사 Photographing lens and photographing apparatus
TWI463169B (en) 2013-07-25 2014-12-01 Largan Precision Co Ltd Image lens assembly and image capturing device
KR101983147B1 (en) 2013-08-16 2019-05-28 삼성전기주식회사 Lens module
TWI467218B (en) * 2013-10-29 2015-01-01 Largan Precision Co Ltd Imaging lens assembly, imaging device and mobile terminal
KR20150058972A (en) 2013-11-21 2015-05-29 삼성전자주식회사 Imaging lens system and imaging apparatus employing the same
KR102180476B1 (en) 2013-12-17 2020-11-18 삼성전자주식회사 Imaging lens system and imaging apparatus employing the same
KR101652849B1 (en) * 2013-12-19 2016-08-31 삼성전기주식회사 Lens module
JP2015222369A (en) 2014-05-23 2015-12-10 富士フイルム株式会社 Imaging lens and imaging apparatus including the same
KR101681382B1 (en) 2014-11-14 2016-12-12 삼성전기주식회사 Optical System
KR102037832B1 (en) 2015-01-12 2019-10-30 삼성전기주식회사 Lens module
KR101748260B1 (en) 2015-04-23 2017-06-16 엘지전자 주식회사 Camera module
KR20170023504A (en) * 2015-08-24 2017-03-06 엘지이노텍 주식회사 Image pickup lens group, camera module and digital device including the same
KR102076189B1 (en) 2019-10-22 2020-02-11 삼성전기주식회사 Lens module
KR102120199B1 (en) 2020-01-10 2020-06-08 삼성전기주식회사 Lens module
KR102207277B1 (en) 2020-05-27 2021-01-25 삼성전기주식회사 Lens module

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000221396A (en) * 1999-02-02 2000-08-11 Canon Inc Zoom lens
JP2000221392A (en) 1999-02-04 2000-08-11 Konica Corp Zoom lens
JP2007121459A (en) 2005-10-25 2007-05-17 Konica Minolta Opto Inc Variable magnification optical system, imaging lens device and digital apparatus

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100896634B1 (en) * 2007-09-12 2009-05-08 삼성전기주식회사 Auto focus Optical System

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000221396A (en) * 1999-02-02 2000-08-11 Canon Inc Zoom lens
JP2000221392A (en) 1999-02-04 2000-08-11 Konica Corp Zoom lens
JP2007121459A (en) 2005-10-25 2007-05-17 Konica Minolta Opto Inc Variable magnification optical system, imaging lens device and digital apparatus

Also Published As

Publication number Publication date
KR20110024872A (en) 2011-03-09

Similar Documents

Publication Publication Date Title
US10324276B2 (en) Imaging lens system
JP5735712B2 (en) Imaging lens and imaging device provided with imaging lens
JP5877183B2 (en) Imaging lens
JP5904623B2 (en) Imaging lens and imaging device provided with imaging lens
CN107942478B (en) Lens module
KR101834728B1 (en) Photographic lens optical system
WO2017199633A1 (en) Imaging lens and imaging device
KR101759058B1 (en) Photographic lens and photographic apparatus including the same
JP5827688B2 (en) Imaging lens and imaging device provided with imaging lens
TWI422900B (en) Photographing optical lens assembly
KR101321276B1 (en) Imaging lens
TWI439720B (en) Image capturing lens assembly
US9459431B2 (en) Wide angle lens, imaging optical device and digital equipment
KR100851838B1 (en) Imaging lens
TWI429981B (en) Optical system for imaging pickup
JP4924141B2 (en) Imaging lens, imaging device, and portable terminal
JP4567366B2 (en) Imaging lens
TWI437311B (en) Optical lens assembly for image taking
TWI432773B (en) Photographing lens assembly
KR101505740B1 (en) Imaging lens
JP4706787B2 (en) Imaging lens, imaging unit, and portable terminal equipped with the same
JP5706584B2 (en) Imaging lens and imaging device provided with imaging lens
US9915804B2 (en) Imaging lens and camera module
US6961191B2 (en) Single focus lens
TWI421533B (en) Optical photographing lens assembly

Legal Events

Date Code Title Description
A201 Request for examination
E902 Notification of reason for refusal
E701 Decision to grant or registration of patent right
A107 Divisional application of patent
GRNT Written decision to grant