CN114167577B - Optical imaging lens - Google Patents

Optical imaging lens Download PDF

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Publication number
CN114167577B
CN114167577B CN202111240423.7A CN202111240423A CN114167577B CN 114167577 B CN114167577 B CN 114167577B CN 202111240423 A CN202111240423 A CN 202111240423A CN 114167577 B CN114167577 B CN 114167577B
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China
Prior art keywords
lens
optical imaging
optical
imaging lens
object side
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CN114167577A (en
Inventor
陈晨
张凯元
徐武超
徐标
戴付建
赵烈烽
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Zhejiang Sunny Optics Co Ltd
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Zhejiang Sunny Optics Co Ltd
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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
    • G02B13/0015—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design
    • G02B13/002—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface
    • G02B13/0045—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface having five or more lenses
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G02B13/18—Optical objectives specially designed for the purposes specified below with lenses having one or more non-spherical faces, e.g. for reducing geometrical aberration
    • 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
    • G03B30/00—Camera modules comprising integrated lens units and imaging units, specially adapted for being embedded in other devices, e.g. mobile phones or vehicles

Abstract

The application discloses an optical imaging lens, which sequentially comprises a first lens with positive focal power from an object side to an image side along an optical axis; a second lens having negative optical power; a third lens having optical power; a fourth lens element with optical power, the image-side surface of which is convex; and a fifth lens with negative focal power, the object side surface of which is a concave surface; half of the diagonal length ImgH of the effective pixel area on the imaging surface of the optical imaging lens and the total effective focal length f of the optical imaging lens meet the following conditions: imgH/f <0.3; and an effective focal length f2 of the second lens and an effective focal length f5 of the fifth lens satisfy: 0.2< f2/f5<1.4.

Description

Optical imaging lens
Statement of divisional application
The application relates to a division application of Chinese application patent application with the application number of 201910913431.X, which is filed in 2019, 09 and 25 days and has the name of an optical imaging lens.
Technical Field
The present application relates to an optical imaging lens, and more particularly, to an optical imaging lens including five lenses.
Background
Along with the progress of science and technology, electronic products with a camera shooting function are rapidly developed and are increasingly applied to multi-scene camera shooting under different environments, wherein the electronic products which can be applied to long-distance high-definition camera shooting are favored by the market. For the image capturing function of electronic products, an optical imaging lens is a key for determining the image capturing effect of the electronic products. The long-focus lens is suitable for long-range shooting due to the characteristics of small depth of field, easiness in realizing background blurring and the like. Therefore, in order for an electronic product to have a good photographing effect at the time of long-distance photographing, an optical imaging lens in a photographing apparatus may be required to have a tele characteristic. However, a long focal length lens is generally extremely susceptible to environmental temperature due to an excessively long focal length, and is susceptible to degradation in imaging quality due to a change in temperature.
Disclosure of Invention
An aspect of the present application provides an optical imaging lens sequentially including, from an object side to an image side along an optical axis: a first lens having positive optical power; a second lens having negative optical power; a third lens having optical power; a fourth lens element with optical power, the image-side surface of which is convex; and a fifth lens with negative focal power, wherein the object side surface of the fifth lens is a concave surface.
In one embodiment, half of the diagonal length ImgH of the effective pixel region on the imaging surface of the optical imaging lens and the total effective focal length f of the optical imaging lens satisfy: imgH/f <0.3.
In one embodiment, the effective focal length f2 of the second lens and the effective focal length f5 of the fifth lens satisfy: 0.2< f2/f5<1.4.
In one embodiment, the total effective focal length f of the optical imaging lens satisfies: 12mm < f <20mm.
In one embodiment, the radius of curvature R1 of the object-side surface of the first lens, the radius of curvature R5 of the object-side surface of the third lens, the effective focal length f1 of the first lens, and the effective focal length f3 of the third lens satisfy: 0.2< (R1+R5)/(f1+f3) <0.7.
In one embodiment, the maximum field angle FOV of the optical imaging lens satisfies: FOV <25 °.
In one embodiment, the distance TTL between the object side surface of the first lens and the imaging surface of the optical imaging lens on the optical axis and the total effective focal length f of the optical imaging lens satisfy: TTL/f <1.1.
In one embodiment, the radius of curvature R4 of the image side of the second lens, the radius of curvature R8 of the image side of the fourth lens, and the radius of curvature R9 of the object side of the fifth lens satisfy: -0.6< R4/(R8+R9) < -0.1.
In one embodiment, the center thickness CT1 of the first lens on the optical axis and the distance TTL between the object side surface of the first lens and the imaging surface of the optical imaging lens on the optical axis satisfy: 1.8< CT1/TTL x 10<2.3.
In one embodiment, the combined focal length f123 of the first lens, the second lens, and the third lens and the combined focal length f45 of the fourth lens and the fifth lens satisfy: -0.8< f123/f45< -0.3.
In one embodiment, the distance T34 between the third lens element and the fourth lens element on the optical axis and the distance BFL between the image side surface of the fifth lens element and the imaging surface of the optical imaging lens element on the optical axis satisfy: 0.2< T34/BFL <0.6.
In one embodiment, the on-axis distance SAG31 from the intersection of the object side surface of the third lens and the optical axis to the vertex of the effective radius of the object side surface of the third lens and the on-axis distance SAG11 from the intersection of the object side surface of the first lens and the optical axis to the vertex of the effective radius of the object side surface of the first lens satisfy: 0.5< SAG31/SAG11<1.3.
In one embodiment, an on-axis distance SAG51 from an intersection point of the object side surface of the fifth lens and the optical axis to an effective radius vertex of the object side surface of the fifth lens, an on-axis distance SAG52 from an intersection point of the image side surface of the fifth lens and the optical axis to an effective radius vertex of the image side surface of the fifth lens, an on-axis distance SAG41 from an intersection point of the object side surface of the fourth lens and the optical axis to an effective radius vertex of the object side surface of the fourth lens, and an on-axis distance SAG42 from an intersection point of the image side surface of the fourth lens and the optical axis to an effective radius vertex of the image side surface of the fourth lens satisfy: 0.2< (SAG51+SAG52)/(SAG41+SAG42) <0.9.
In one embodiment, at least one of the first to fifth lenses is a glass lens.
In one embodiment, the object side surface and the image side surface of at least one of the first lens element to the fifth lens element are spherical.
The optical imaging lens provided by the application adopts a plurality of lens settings, including a first lens to a fifth lens. The total effective focal length of the optical imaging lens is reasonably set, and the focal power and the surface shape of each lens are optimally set, so that the optical imaging lens has good imaging quality while having long focal length characteristics.
Drawings
Other features, objects and advantages of the present application will become more apparent from the following detailed description of non-limiting embodiments, taken in conjunction with the accompanying drawings. In the drawings:
fig. 1 shows a schematic configuration diagram of an optical imaging lens according to embodiment 1 of the present application;
fig. 2A to 2D show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve, respectively, of the optical imaging lens of embodiment 1;
fig. 3 is a schematic diagram showing the structure of an optical imaging lens according to embodiment 2 of the present application;
fig. 4A to 4D show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve, respectively, of the optical imaging lens of embodiment 2;
fig. 5 shows a schematic structural view of an optical imaging lens according to embodiment 3 of the present application;
fig. 6A to 6D show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve, respectively, of the optical imaging lens of embodiment 3;
fig. 7 shows a schematic configuration diagram of an optical imaging lens according to embodiment 4 of the present application;
fig. 8A to 8D show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve, respectively, of the optical imaging lens of embodiment 4;
fig. 9 shows a schematic configuration diagram of an optical imaging lens according to embodiment 5 of the present application;
fig. 10A to 10D show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve, respectively, of the optical imaging lens of embodiment 5;
fig. 11 shows a schematic structural view of an optical imaging lens according to embodiment 6 of the present application;
fig. 12A to 12D show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve, respectively, of the optical imaging lens of embodiment 6;
fig. 13 is a schematic diagram showing the structure of an optical imaging lens according to embodiment 7 of the present application;
fig. 14A to 14D show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve, respectively, of the optical imaging lens of embodiment 7;
fig. 15 shows a schematic structural view of an optical imaging lens according to embodiment 8 of the present application;
fig. 16A to 16D show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve of the optical imaging lens of embodiment 8, respectively.
Detailed Description
For a better understanding of the application, various aspects of the application will be described in more detail with reference to the accompanying drawings. It should be understood that the detailed description is merely illustrative of exemplary embodiments of the application and is not intended to limit the scope of the application in any way. Like reference numerals refer to like elements throughout the specification. The expression "and/or" includes any and all combinations of one or more of the associated listed items.
It should be noted that in the present specification, the expressions of first, second, third, etc. are only used to distinguish one feature from another feature, and do not represent any limitation on the feature. Accordingly, a first lens discussed below may also be referred to as a second lens or a third lens without departing from the teachings of the present application.
In the drawings, the thickness, size, and shape of the lenses have been slightly exaggerated for convenience of explanation. In particular, the spherical or aspherical shape shown in the drawings is shown by way of example. That is, the shape of the spherical or aspherical surface is not limited to the shape of the spherical or aspherical surface shown in the drawings. The figures are merely examples and are not drawn to scale.
Herein, the paraxial region refers to a region near the optical axis. If the lens surface is convex and the convex position is not defined, then the lens surface is convex at least in the paraxial region; if the lens surface is concave and the concave position is not defined, it means that the lens surface is concave at least in the paraxial region. The surface of each lens closest to the object is referred to as the object side of the lens, and the surface of each lens closest to the imaging plane is referred to as the image side of the lens.
It will be further understood that the terms "comprises," "comprising," "includes," "including," "having," "containing," and/or "including," when used in this specification, specify the presence of stated features, elements, and/or components, but do not preclude the presence or addition of one or more other features, elements, components, and/or groups thereof. Furthermore, when a statement such as "at least one of the following" appears after a list of features that are listed, the entire listed feature is modified instead of modifying a separate element in the list. Furthermore, when describing embodiments of the application, use of "may" means "one or more embodiments of the application. Also, the term "exemplary" is intended to refer to an example or illustration.
Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be combined with each other. The application will be described in detail below with reference to the drawings in connection with embodiments.
The features, principles, and other aspects of the present application are described in detail below.
The optical imaging lens according to the exemplary embodiment of the present application may include, for example, five lenses having optical power, i.e., a first lens, a second lens, a third lens, a fourth lens, and a fifth lens. The five lenses are sequentially arranged from the object side to the image side along the optical axis.
In an exemplary embodiment, the first lens may have positive optical power; the second lens may have negative optical power; the third lens may have positive or negative optical power; the fourth lens can have positive focal power or negative focal power, and the image side surface of the fourth lens is a convex surface; and the fifth lens can have negative focal power, and the object side surface of the fifth lens is concave. By reasonably configuring the focal power and the surface shape of each lens, the imaging quality of the optical imaging lens can be improved.
The total effective focal length f of the optical imaging lens can satisfy: 12mm < f <20mm, for example, 12mm < f <16mm. The total effective focal length of the optical imaging lens is set between 12mm and 20mm, so that the optical imaging lens has long-focus characteristic, and long-distance high-definition imaging of the optical imaging system is facilitated.
In an exemplary embodiment, half of the diagonal length ImgH of the effective pixel region on the imaging surface of the optical imaging lens and the total effective focal length f of the optical imaging lens may satisfy: imgH/f <0.3, e.g., 0.1< ImgH/f <0.3. The proportional relation between half of the diagonal length of the effective pixel area on the imaging surface of the optical imaging lens and the total effective focal length of the optical imaging lens is reasonably set, so that the optical imaging system is compact in structure and has the long-focus characteristic, and long-distance high-definition imaging of the optical imaging system is facilitated.
In an exemplary embodiment, the radius of curvature R1 of the object side of the first lens, the radius of curvature R5 of the object side of the third lens, the effective focal length f1 of the first lens, and the effective focal length f3 of the third lens may satisfy: 0.2< (r1+r5)/(f1+f3) <0.7, for example, 0.3< (r1+r5)/(f1+f3) <0.6. And the proportional relation between the sum of the curvature radius of the object side surface of the first lens and the curvature radius of the object side surface of the third lens and the sum of the effective focal length of the first lens and the effective focal length of the third lens is reasonably set, so that the optical path deflection in the optical system can be better realized, and the advanced spherical aberration generated by the optical system can be balanced.
In an exemplary embodiment, the effective focal length f2 of the second lens and the effective focal length f5 of the fifth lens may satisfy: 0.2< f2/f5<1.4. The proportional relation between the effective focal length of the second lens and the effective focal length of the fifth lens is reasonably set, so that the optical sensitivity of the second lens and the optical sensitivity of the fifth lens are reduced, and mass production is easy to realize.
In an exemplary embodiment, the maximum field angle FOV of the optical imaging lens may satisfy: FOV <25 °, e.g., 20 ° < FOV <25 °. The angle of the maximum field angle of the optical imaging lens is reasonably set, so that the imaging range of the optical system can be controlled.
In an exemplary embodiment, the distance TTL between the object side surface of the first lens and the imaging surface of the optical imaging lens on the optical axis and the total effective focal length f of the optical imaging lens may satisfy: TTL/f <1.1, e.g., 0.8< TTL/f <1.1. The proportional relation between the distance from the object side surface of the first lens to the imaging surface of the optical imaging lens on the optical axis and the total effective focal length of the optical imaging lens is reasonably set, so that the optical imaging system is beneficial to meeting the characteristic of long focus, and the overall length of the optical system is ensured to be in a reasonable range, so that the lightening and thinning of the lens are realized.
In an exemplary embodiment, the radius of curvature R4 of the image side of the second lens, the radius of curvature R8 of the image side of the fourth lens, and the radius of curvature R9 of the object side of the fifth lens may satisfy: -0.6< R4/(R8+R9) < -0.1. And the proportional relation between the curvature radius of the image side surface of the second lens and the sum of the curvature radius of the image side surface of the fourth lens and the curvature radius of the object side surface of the fifth lens is reasonably set, so that the deflection angle of the marginal light ray of the optical system is controlled, and the sensitivity of the optical system is reduced.
In an exemplary embodiment, the center thickness CT1 of the first lens on the optical axis and the distance TTL between the object side surface of the first lens and the imaging surface of the optical imaging lens on the optical axis may satisfy: 1.8< CT1/TTL x 10<2.3. The proportional relation between the central thickness of the first lens on the optical axis and the distance from the object side surface of the first lens to the imaging surface of the optical imaging lens on the optical axis is reasonably set, so that the optical imaging lens has good machinability and the refraction angle of incident light rays on the first lens is not too large, and the imaging quality of an optical system is improved.
In an exemplary embodiment, the combined focal length f123 of the first, second, and third lenses and the combined focal length f45 of the fourth and fifth lenses may satisfy: -0.8< f123/f45< -0.3. The proportional relation between the combined focal length of the first lens, the second lens and the third lens and the combined focal length of the fourth lens and the fifth lens is reasonably set, so that off-axis aberration of the optical system is balanced, and the aberration correcting capability of the system is improved.
In an exemplary embodiment, the distance T34 between the third lens element and the fourth lens element on the optical axis and the distance BFL between the image side surface of the fifth lens element and the imaging surface of the optical imaging lens element on the optical axis may satisfy: 0.2< T34/BFL <0.6. The ratio of the spacing distance between the third lens and the fourth lens on the optical axis and the distance between the image side surface of the fifth lens and the imaging surface of the optical imaging lens on the optical axis is set within a reasonable numerical range, so that effective balancing of field curvature between lenses in the optical system is facilitated, and the optical system has reasonable field curvature.
In an exemplary embodiment, an on-axis distance SAG31 from an intersection of the object side surface of the third lens and the optical axis to an effective radius vertex of the object side surface of the third lens and an on-axis distance SAG11 from an intersection of the object side surface of the first lens and the optical axis to an effective radius vertex of the object side surface of the first lens may satisfy: 0.5< SAG31/SAG11<1.3. And the proportional relation between the on-axis distance from the intersection point of the object side surface of the third lens and the optical axis to the vertex of the effective radius of the object side surface of the third lens and the on-axis distance from the intersection point of the object side surface of the first lens and the optical axis to the vertex of the effective radius of the object side surface of the first lens is reasonably set, so that the adjustment of the angle of the principal ray of the optical imaging lens is facilitated, the relative brightness of the lens group in the optical imaging lens is improved, and the definition of the image plane is improved.
In an exemplary embodiment, an on-axis distance SAG51 from an intersection point of the object side surface of the fifth lens and the optical axis to an effective radius vertex of the object side surface of the fifth lens, an on-axis distance SAG52 from an intersection point of the image side surface of the fifth lens and the optical axis to an effective radius vertex of the image side surface of the fifth lens, an on-axis distance SAG41 from an intersection point of the object side surface of the fourth lens and the optical axis to an effective radius vertex of the object side surface of the fourth lens and an on-axis distance SAG42 from an intersection point of the image side surface of the fourth lens to an effective radius vertex of the image side surface of the fourth lens may satisfy: 0.2< (SAG51+SAG52)/(SAG41+SAG42) <0.9. The proportional relation between the sum of the object-side sagittal height of the fifth lens and the sum of the image-side sagittal height of the fifth lens and the sum of the object-side sagittal height of the fourth lens and the image-side sagittal height of the fourth lens is reasonably set, so that the shapes and the processing of the fourth lens and the fifth lens are guaranteed to be at a better level, and the spherical aberration, the coma aberration and the astigmatism generated by the optical system are balanced.
In an exemplary embodiment, at least one of the first to fifth lenses may be a glass lens. The use of a glass lens in an optical imaging lens may have at least one of the following benefits: glass has a wide refractive index distribution, a wide selection source of materials, a low thermal expansion coefficient of the glass, and the like. Meanwhile, as the thermal expansion coefficient of the glass is low, the glass lens can optimize adverse effects caused by the ambient temperature when applied to an optical imaging system, and improve the thermal stability of the optical system. Alternatively, the third lens may be a glass lens.
In an exemplary embodiment, the object side surface and the image side surface of at least one of the first to fifth lenses are spherical surfaces. Compared with the aspheric surface type, the spherical surface type arrangement can effectively reduce the processing cost of the lens and the influence of the surface type sensitivity, thereby improving the production yield of the lens in the optical system. Optionally, the object side surface and the image side surface of the third lens are spherical surfaces.
In an exemplary embodiment, the optical imaging lens may further include a diaphragm. The diaphragm may be provided at an appropriate position as required. For example, a diaphragm is provided between the object side and the first lens, near the object side of the first lens. Optionally, the optical imaging lens may further include a filter for correcting color deviation and/or a protective glass for protecting a photosensitive element located on the imaging surface.
In an exemplary embodiment, the object side and/or image side of a portion of the lenses in an optical imaging lens according to the present application may be aspherical mirrors. The aspherical lens is characterized in that: the curvature varies continuously from the center of the lens to the periphery of the lens. Unlike a spherical lens having a constant curvature from the center of the lens to the periphery of the lens, an aspherical lens has a better radius of curvature characteristic, and has advantages of improving distortion aberration and improving astigmatic aberration. By adopting the aspherical lens, aberration occurring at the time of imaging can be eliminated as much as possible, thereby improving imaging quality. Alternatively, either or both of the object side surface and the image side surface of at least one of the first lens, the second lens, the fourth lens, and the fifth lens may be aspherical mirror surfaces. Alternatively, the object side surface and the image side surface of each of the first lens, the second lens, the fourth lens, and the fifth lens may be aspherical mirror surfaces.
The optical imaging lens according to the present application may have a long focal length. The depth of field is small, so that the background blurring is easy to realize, and the method is very suitable for long-range shooting. Meanwhile, as the lens part of the lens system is made of glass and the lens part of the lens system is made of plastic, the adaptability of the optical imaging lens to the environment temperature and the thermal stability of the optical system can be enhanced.
Exemplary embodiments of the present application also provide an image pickup apparatus including the above-described optical imaging lens.
Exemplary embodiments of the present application also provide an electronic apparatus including the image pickup device described above.
However, it will be appreciated by those skilled in the art that the number of lenses making up the optical imaging lens can be varied to achieve the various results and advantages described in this specification without departing from the technical solution claimed in the present application. For example, although the description has been made by taking five lenses as an example in the embodiment, the optical imaging lens is not limited to include five lenses. The optical imaging lens may also include other numbers of lenses, if desired.
Specific examples of the optical imaging lens applicable to the above-described embodiments are further described below with reference to the accompanying drawings.
Example 1
An optical imaging lens according to embodiment 1 of the present application is described below with reference to fig. 1 to 2D. Fig. 1 is a schematic diagram showing the structure of an optical imaging lens according to embodiment 1 of the present application.
As shown in fig. 1, the optical imaging lens sequentially includes, from an object side to an image side along an optical axis: stop STO, first lens E1, second lens E2, third lens E3, fourth lens E4, fifth lens E5, filter E6 and imaging surface S13.
The first lens element E1 has positive refractive power, wherein an object-side surface S1 thereof is convex, and an image-side surface S2 thereof is concave. The second lens element E2 has negative refractive power, wherein an object-side surface S3 thereof is convex, and an image-side surface S4 thereof is concave. The third lens element E3 has positive refractive power, wherein an object-side surface S5 thereof is convex, and an image-side surface S6 thereof is concave. The fourth lens element E4 has positive refractive power, wherein an object-side surface S7 thereof is concave and an image-side surface S8 thereof is convex. The fifth lens element E5 has negative refractive power, wherein an object-side surface S9 thereof is concave and an image-side surface S10 thereof is convex. The filter E6 has an object side surface S11 and an image side surface S12. Light from the object sequentially passes through the respective surfaces S1 to S12 and is finally imaged on the imaging surface S13.
Table 1 shows the basic parameter table of the optical imaging lens of embodiment 1, in which the units of radius of curvature, thickness/distance, and focal length are all millimeters (mm).
TABLE 1
In the present embodiment, the total effective focal length f= 14.44mm of the optical imaging lens, the distance ttl=12.69 mm on the optical axis from the object side surface S1 of the first lens E1 to the imaging surface S13, half of the diagonal length imgh=2.70 mm of the effective pixel area on the imaging surface S13, and the maximum field angle fov=21.0° of the optical imaging lens.
In embodiment 1, the object side surface and the image side surface of the first lens element E1, the second lens element E2, the fourth lens element E4 and the fifth lens element E5 are aspheric, and the surface profile x of each aspheric lens element can be defined by, but not limited to, the following aspheric formula:
wherein x is the distance vector height from the vertex of the aspheric surface when the aspheric surface is at the position with the height h along the optical axis direction; c is the paraxial curvature of the aspheric surface, c=1/R (i.e., paraxial curvature c is the inverse of radius of curvature R in table 1 above); k is a conic coefficient; ai is the correction coefficient of the aspherical i-th order. Table 2 below shows the higher order coefficients A that can be used for each of the aspherical mirrors S1-S4 and S7-S10 in example 1 4 、A 6 、A 8 、A 10 、A 12 、A 14 、A 16 、A 18 And A 20 。
Face number A4 A6 A8 A10 A12 A14 A16 A18 A20
S1 -1.9000E-04 -1.4000E-05 -1.3000E-05 1.4700E-05 -7.7000E-06 2.5200E-06 -4.9000E-07 5.0200E-08 -2.0000E-09
S2 1.3228E-02 -4.0200E-03 1.5850E-03 2.7900E-04 -1.2800E-03 1.1000E-03 -4.6000E-04 9.4400E-05 -7.1000E-06
S3 7.9480E-03 -1.3600E-02 1.4207E-02 -1.3080E-02 8.5840E-03 -3.6200E-03 9.0200E-04 -1.2000E-04 6.4000E-06
S4 3.1882E-02 -2.2120E-02 2.0181E-02 -1.8360E-02 1.2831E-02 -5.9900E-03 1.7040E-03 -2.6000E-04 1.5700E-05
S7 -2.1390E-02 -7.4300E-03 -9.5200E-03 1.8592E-02 -1.5380E-02 5.1920E-03 8.9900E-04 -1.1400E-03 2.3700E-04
S8 -6.5110E-02 8.1489E-02 -2.6693E-01 4.4461E-01 -4.2400E-01 2.4247E-01 -8.2140E-02 1.5144E-02 -1.1600E-03
S9 -8.3720E-02 1.3437E-01 -3.6957E-01 6.0444E-01 -5.7812E-01 3.3287E-01 -1.1391E-01 2.1337E-02 -1.6800E-03
S10 -3.7480E-02 2.7444E-02 -3.7510E-02 4.5052E-02 -3.7170E-02 1.9104E-02 -5.8700E-03 9.9100E-04 -7.1000E-05
TABLE 2
Fig. 2A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 1, which indicates the deviation of the converging focus after light rays of different wavelengths pass through the lens. Fig. 2B shows an astigmatism curve of the optical imaging lens of embodiment 1, which represents meridional image plane curvature and sagittal image plane curvature. Fig. 2C shows a distortion curve of the optical imaging lens of embodiment 1, which represents distortion magnitude values corresponding to different angles of view. Fig. 2D shows a magnification chromatic aberration curve of the optical imaging lens of embodiment 1, which represents the deviation of different image heights on the imaging plane after light passes through the lens. As can be seen from fig. 2A to 2D, the optical imaging lens provided in embodiment 1 can achieve good imaging quality.
Example 2
An optical imaging lens according to embodiment 2 of the present application is described below with reference to fig. 3 to 4D. Fig. 3 shows a schematic configuration of an optical imaging lens according to embodiment 2 of the present application.
As shown in fig. 3, the optical imaging lens sequentially includes, from an object side to an image side along an optical axis: stop STO, first lens E1, second lens E2, third lens E3, fourth lens E4, fifth lens E5, filter E6 and imaging surface S13.
The first lens element E1 has positive refractive power, wherein an object-side surface S1 thereof is convex, and an image-side surface S2 thereof is concave. The second lens element E2 has negative refractive power, wherein an object-side surface S3 thereof is convex, and an image-side surface S4 thereof is concave. The third lens element E3 has positive refractive power, wherein an object-side surface S5 thereof is convex, and an image-side surface S6 thereof is concave. The fourth lens element E4 has positive refractive power, wherein an object-side surface S7 thereof is concave and an image-side surface S8 thereof is convex. The fifth lens element E5 has negative refractive power, wherein an object-side surface S9 thereof is concave, and an image-side surface S10 thereof is concave. The filter E6 has an object side surface S11 and an image side surface S12. Light from the object sequentially passes through the respective surfaces S1 to S12 and is finally imaged on the imaging surface S13.
In the present embodiment, the total effective focal length f=14.35 mm of the optical imaging lens, the distance ttl=12.69 mm on the optical axis from the object side surface S1 of the first lens E1 to the imaging surface S13, half of the diagonal length imgh=2.70 mm of the effective pixel area on the imaging surface S13, and the maximum field angle fov=21.2° of the optical imaging lens.
Table 3 shows the basic parameter table of the optical imaging lens of embodiment 2, in which the units of radius of curvature, thickness/distance, and focal length are all millimeters (mm). Table 4 shows the higher order coefficients that can be used for each of the aspherical mirror surfaces in example 2.
TABLE 3 Table 3
Face number A4 A6 A8 A10 A12 A14 A16 A18 A20
S1 -3.0000E-04 4.0300E-05 -8.6000E-05 4.8700E-05 -1.4000E-05 1.8600E-06 4.2200E-08 -3.9000E-08 3.1700E-09
S2 1.2444E-02 -1.4200E-03 -5.8700E-03 7.8880E-03 -4.9200E-03 1.6330E-03 -2.5000E-04 -4.2000E-07 3.2300E-06
S3 2.0096E-02 -1.2220E-02 7.0000E-05 7.0390E-03 -6.5300E-03 3.0670E-03 -8.2000E-04 1.2000E-04 -7.3000E-06
S4 3.2025E-02 -1.4210E-02 4.8620E-03 2.5410E-03 -5.1600E-03 3.7090E-03 -1.4900E-03 3.2700E-04 -3.1000E-05
S7 -1.9520E-02 -1.0670E-02 3.1920E-03 -4.9900E-03 9.3580E-03 -9.6300E-03 5.8090E-03 -1.9300E-03 2.7700E-04
S8 -6.4910E-02 8.9658E-02 -2.6721E-01 4.2568E-01 -3.9836E-01 2.2699E-01 -7.7530E-02 1.4578E-02 -1.1600E-03
S9 -1.0052E-01 1.7137E-01 -4.1283E-01 6.3337E-01 -5.8909E-01 3.3549E-01 -1.1472E-01 2.1650E-02 -1.7300E-03
S10 -4.1200E-02 3.5834E-02 -5.2470E-02 6.3270E-02 -5.1530E-02 2.6276E-02 -8.0600E-03 1.3600E-03 -9.7000E-05
TABLE 4 Table 4
Fig. 4A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 2, which indicates the deviation of the converging focus after light rays of different wavelengths pass through the lens. Fig. 4B shows an astigmatism curve of the optical imaging lens of embodiment 2, which represents meridional image plane curvature and sagittal image plane curvature. Fig. 4C shows a distortion curve of the optical imaging lens of embodiment 2, which represents distortion magnitude values corresponding to different angles of view. Fig. 4D shows a magnification chromatic aberration curve of the optical imaging lens of embodiment 2, which represents the deviation of different image heights on the imaging plane after light passes through the lens. As can be seen from fig. 4A to 4D, the optical imaging lens provided in embodiment 2 can achieve good imaging quality.
Example 3
An optical imaging lens according to embodiment 3 of the present application is described below with reference to fig. 5 to 6D. Fig. 5 shows a schematic configuration diagram of an optical imaging lens according to embodiment 3 of the present application.
As shown in fig. 5, the optical imaging lens sequentially includes, from an object side to an image side along an optical axis: stop STO, first lens E1, second lens E2, third lens E3, fourth lens E4, fifth lens E5, filter E6 and imaging surface S13.
The first lens element E1 has positive refractive power, wherein an object-side surface S1 thereof is convex, and an image-side surface S2 thereof is concave. The second lens element E2 has negative refractive power, wherein an object-side surface S3 thereof is concave, and an image-side surface S4 thereof is concave. The third lens element E3 has positive refractive power, wherein an object-side surface S5 thereof is convex, and an image-side surface S6 thereof is concave. The fourth lens element E4 has positive refractive power, wherein an object-side surface S7 thereof is concave and an image-side surface S8 thereof is convex. The fifth lens element E5 has negative refractive power, wherein an object-side surface S9 thereof is concave, and an image-side surface S10 thereof is concave. The filter E6 has an object side surface S11 and an image side surface S12. Light from the object sequentially passes through the respective surfaces S1 to S12 and is finally imaged on the imaging surface S13.
In the present embodiment, the total effective focal length f=13.50 mm of the optical imaging lens, the distance ttl=12.63 mm on the optical axis from the object side surface S1 of the first lens E1 to the imaging surface S13, half of the diagonal length imgh=2.52 mm of the effective pixel area on the imaging surface S13, and the maximum field angle fov=21.0° of the optical imaging lens.
Table 5 shows the basic parameter table of the optical imaging lens of embodiment 3, in which the units of radius of curvature, thickness/distance, and focal length are all millimeters (mm). Table 6 shows the higher order coefficients that can be used for each of the aspherical mirror surfaces in example 3.
TABLE 5
Face number A4 A6 A8 A10 A12 A14 A16 A18 A20
S1 -3.9000E-04 1.1400E-04 -2.3000E-04 2.3100E-04 -1.4000E-04 5.2200E-05 -1.2000E-05 1.4400E-06 -7.5000E-08
S2 9.3160E-03 -1.3100E-03 3.1500E-04 1.7400E-04 -1.1100E-03 1.3890E-03 -7.4000E-04 1.7600E-04 -1.5000E-05
S3 3.5780E-03 -5.2700E-03 6.5960E-03 -9.1100E-03 7.8510E-03 -3.8600E-03 1.0400E-03 -1.4000E-04 7.7500E-06
S4 2.2071E-02 -1.2350E-02 1.3345E-02 -1.8200E-02 1.7759E-02 -1.0940E-02 4.0410E-03 -8.2000E-04 7.0700E-05
S7 -3.4440E-02 1.0654E-02 -4.0400E-02 5.0931E-02 -2.7960E-02 -6.9000E-03 1.8497E-02 -9.5000E-03 1.6790E-03
S8 -1.2443E-01 3.0056E-01 -6.5961E-01 8.9679E-01 -7.7977E-01 4.3237E-01 -1.4709E-01 2.7800E-02 -2.2200E-03
S9 -1.4904E-01 4.1018E-01 -8.7566E-01 1.1810E+00 -1.0236E+00 5.6725E-01 -1.9359E-01 3.6924E-02 -3.0000E-03
S10 -3.8280E-02 4.5390E-02 -7.8070E-02 8.9695E-02 -6.7300E-02 3.2146E-02 -9.3900E-03 1.5240E-03 -1.1000E-04
TABLE 6
Fig. 6A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 3, which indicates a convergent focus deviation of light rays of different wavelengths after passing through the lens. Fig. 6B shows an astigmatism curve of the optical imaging lens of embodiment 3, which represents meridional image plane curvature and sagittal image plane curvature. Fig. 6C shows a distortion curve of the optical imaging lens of embodiment 3, which represents distortion magnitude values corresponding to different angles of view. Fig. 6D shows a magnification chromatic aberration curve of the optical imaging lens of embodiment 3, which represents the deviation of different image heights on the imaging plane after light passes through the lens. As can be seen from fig. 6A to 6D, the optical imaging lens provided in embodiment 3 can achieve good imaging quality.
Example 4
An optical imaging lens according to embodiment 4 of the present application is described below with reference to fig. 7 to 8D. Fig. 7 shows a schematic configuration diagram of an optical imaging lens according to embodiment 4 of the present application.
As shown in fig. 7, the optical imaging lens sequentially includes, from an object side to an image side along an optical axis: stop STO, first lens E1, second lens E2, third lens E3, fourth lens E4, fifth lens E5, filter E6 and imaging surface S13.
The first lens element E1 has positive refractive power, wherein an object-side surface S1 thereof is convex, and an image-side surface S2 thereof is concave. The second lens element E2 has negative refractive power, wherein an object-side surface S3 thereof is convex, and an image-side surface S4 thereof is concave. The third lens element E3 has positive refractive power, wherein an object-side surface S5 thereof is convex, and an image-side surface S6 thereof is concave. The fourth lens element E4 has negative refractive power, wherein an object-side surface S7 thereof is concave and an image-side surface S8 thereof is convex. The fifth lens element E5 has negative refractive power, wherein an object-side surface S9 thereof is concave and an image-side surface S10 thereof is convex. The filter E6 has an object side surface S11 and an image side surface S12. Light from the object sequentially passes through the respective surfaces S1 to S12 and is finally imaged on the imaging surface S13.
In the present embodiment, the total effective focal length f=13.30 mm of the optical imaging lens, the distance ttl=12.99 mm on the optical axis from the object side surface S1 of the first lens E1 to the imaging surface S13, half of the diagonal length imgh=2.70 mm of the effective pixel area on the imaging surface S13, and the maximum field angle fov=22.9° of the optical imaging lens.
Table 7 shows a basic parameter table of the optical imaging lens of example 4, in which the units of radius of curvature, thickness/distance, and focal length are all millimeters (mm). Table 8 shows the higher order coefficients that can be used for each of the aspherical mirror surfaces in example 4.
TABLE 7
Face number A4 A6 A8 A10 A12 A14 A16 A18 A20
S1 -7.8000E-04 5.5100E-05 -1.0000E-04 9.4000E-05 -5.7000E-05 2.2000E-05 -5.0000E-06 6.2700E-07 -3.2567E-08
S2 2.2790E-03 2.6330E-03 -8.5000E-04 -7.4000E-04 6.8400E-04 1.0600E-04 -2.6000E-04 8.5700E-05 -8.5046E-06
S3 -1.4090E-02 1.1362E-02 -3.9700E-03 -2.7000E-03 4.6020E-03 -2.6800E-03 7.6500E-04 -1.1000E-04 5.7710E-06
S4 1.3747E-02 -1.5000E-03 3.8860E-03 -9.6200E-03 1.0794E-02 -6.8600E-03 2.5010E-03 -4.9000E-04 3.9665E-05
S7 -2.8800E-02 1.6207E-02 -5.2540E-02 9.5071E-02 -1.0695E-01 7.0830E-02 -2.5080E-02 3.6540E-03 1.1650E-05
S8 -1.9296E-01 3.9520E-01 -6.5644E-01 8.4967E-01 -7.9408E-01 4.8722E-01 -1.8208E-01 3.7315E-02 -3.2053E-03
S9 -2.5242E-01 5.5200E-01 -8.9598E-01 1.1428E+00 -1.0597E+00 6.4697E-01 -2.4075E-01 4.9126E-02 -4.2010E-03
S10 -4.5760E-02 7.3470E-02 -1.0720E-01 1.2243E-01 -1.0223E-01 5.6491E-02 -1.9090E-02 3.5430E-03 -2.7585E-04
TABLE 8
Fig. 8A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 4, which indicates a convergent focus deviation of light rays of different wavelengths after passing through the lens. Fig. 8B shows an astigmatism curve of the optical imaging lens of embodiment 4, which represents meridional image plane curvature and sagittal image plane curvature. Fig. 8C shows a distortion curve of the optical imaging lens of embodiment 4, which represents distortion magnitude values corresponding to different angles of view. Fig. 8D shows a magnification chromatic aberration curve of the optical imaging lens of embodiment 4, which represents the deviation of different image heights on the imaging plane after light passes through the lens. As can be seen from fig. 8A to 8D, the optical imaging lens provided in embodiment 4 can achieve good imaging quality.
Example 5
An optical imaging lens according to embodiment 5 of the present application is described below with reference to fig. 9 to 10D. Fig. 9 shows a schematic configuration of an optical imaging lens according to embodiment 5 of the present application.
As shown in fig. 9, the optical imaging lens sequentially includes, from an object side to an image side along an optical axis: stop STO, first lens E1, second lens E2, third lens E3, fourth lens E4, fifth lens E5, filter E6 and imaging surface S13.
The first lens element E1 has positive refractive power, wherein an object-side surface S1 thereof is convex, and an image-side surface S2 thereof is convex. The second lens element E2 has negative refractive power, wherein an object-side surface S3 thereof is convex, and an image-side surface S4 thereof is concave. The third lens element E3 has positive refractive power, wherein an object-side surface S5 thereof is convex, and an image-side surface S6 thereof is concave. The fourth lens element E4 has positive refractive power, wherein an object-side surface S7 thereof is concave and an image-side surface S8 thereof is convex. The fifth lens element E5 has negative refractive power, wherein an object-side surface S9 thereof is concave, and an image-side surface S10 thereof is concave. The filter E6 has an object side surface S11 and an image side surface S12. Light from the object sequentially passes through the respective surfaces S1 to S12 and is finally imaged on the imaging surface S13.
In the present embodiment, the total effective focal length f=13.13 mm of the optical imaging lens, the distance ttl=12.76 mm on the optical axis from the object side surface S1 of the first lens E1 to the imaging surface S13, half of the diagonal length imgh=2.68 mm of the effective pixel area on the imaging surface S13, and the maximum field angle fov=22.9° of the optical imaging lens.
Table 9 shows a basic parameter table of the optical imaging lens of embodiment 5, in which the units of radius of curvature, thickness/distance, and focal length are all millimeters (mm). Table 10 shows the higher order coefficients that can be used for each of the aspherical mirror surfaces in example 5.
TABLE 9
Face number A4 A6 A8 A10 A12 A14 A16 A18 A20
S1 -1.3900E-03 1.5300E-04 -5.7000E-04 5.9000E-04 -3.6194E-04 1.3600E-04 -3.1000E-05 3.8900E-06 -2.1000E-07
S2 5.4193E-02 -1.3271E-01 1.7255E-01 -1.4127E-01 7.5481E-02 -2.6290E-02 5.7570E-03 -7.2000E-04 3.9800E-05
S3 4.9914E-02 -1.2653E-01 1.6338E-01 -1.3116E-01 6.7787E-02 -2.2450E-02 4.5600E-03 -5.1000E-04 2.4300E-05
S4 3.0966E-02 -3.2260E-02 3.0205E-02 -2.0980E-02 9.2311E-03 -2.2700E-03 1.8900E-04 3.1900E-05 -5.8000E-06
S7 -1.6430E-02 -8.4000E-03 -3.0040E-02 8.2736E-02 -1.0491E-01 7.5475E-02 -3.0830E-02 6.5160E-03 -5.2000E-04
S8 5.4450E-03 -2.3295E-01 4.3709E-01 -4.7152E-01 3.1392E-01 -1.3000E-01 3.2327E-02 -4.3700E-03 2.4500E-04
S9 3.1820E-02 -3.4271E-01 6.5385E-01 -7.1413E-01 4.8539E-01 -2.0729E-01 5.3754E-02 -7.6600E-03 4.5500E-04
S10 -2.2310E-02 -3.2080E-02 6.7837E-02 -6.9530E-02 4.3263E-02 -1.6840E-02 3.9780E-03 -5.1000E-04 2.7000E-05
Table 10
Fig. 10A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 5, which indicates a convergent focus deviation of light rays of different wavelengths after passing through the lens. Fig. 10B shows an astigmatism curve of the optical imaging lens of embodiment 5, which represents meridional image plane curvature and sagittal image plane curvature. Fig. 10C shows a distortion curve of the optical imaging lens of embodiment 5, which represents distortion magnitude values corresponding to different angles of view. Fig. 10D shows a magnification chromatic aberration curve of the optical imaging lens of embodiment 5, which represents the deviation of different image heights on the imaging plane after light passes through the lens. As can be seen from fig. 10A to 10D, the optical imaging lens provided in embodiment 5 can achieve good imaging quality.
Example 6
An optical imaging lens according to embodiment 6 of the present application is described below with reference to fig. 11 to 12D. Fig. 11 shows a schematic structural diagram of an optical imaging lens according to embodiment 6 of the present application.
As shown in fig. 11, the optical imaging lens sequentially includes, from an object side to an image side along an optical axis: stop STO, first lens E1, second lens E2, third lens E3, fourth lens E4, fifth lens E5, filter E6 and imaging surface S13.
The first lens element E1 has positive refractive power, wherein an object-side surface S1 thereof is convex, and an image-side surface S2 thereof is concave. The second lens element E2 has negative refractive power, wherein an object-side surface S3 thereof is convex, and an image-side surface S4 thereof is concave. The third lens element E3 has positive refractive power, wherein an object-side surface S5 thereof is convex, and an image-side surface S6 thereof is convex. The fourth lens element E4 has positive refractive power, wherein an object-side surface S7 thereof is concave and an image-side surface S8 thereof is convex. The fifth lens element E5 has negative refractive power, wherein an object-side surface S9 thereof is concave, and an image-side surface S10 thereof is concave. The filter E6 has an object side surface S11 and an image side surface S12. Light from the object sequentially passes through the respective surfaces S1 to S12 and is finally imaged on the imaging surface S13.
In the present embodiment, the total effective focal length f=13.23 mm of the optical imaging lens, the distance ttl=12.89 mm on the optical axis from the object side surface S1 of the first lens E1 to the imaging surface S13, half of the diagonal length imgh=2.65 mm of the effective pixel area on the imaging surface S13, and the maximum field angle fov=22.5° of the optical imaging lens.
Table 11 shows a basic parameter table of the optical imaging lens of embodiment 6, in which the units of radius of curvature, thickness/distance, and focal length are all millimeters (mm). Table 12 shows the higher order coefficients that can be used for each of the aspherical mirror surfaces in example 6.
TABLE 11
Face number A4 A6 A8 A10 A12 A14 A16 A18 A20
S1 -1.7000E-04 1.9500E-04 -3.5962E-04 3.8000E-04 -2.4000E-04 9.3400E-05 -2.2000E-05 2.8100E-06 -1.5000E-07
S2 1.0976E-02 -3.8900E-03 9.0891E-03 -1.4040E-02 1.1781E-02 -5.3000E-03 1.0930E-03 -4.5000E-05 -9.2000E-06
S3 -6.5200E-03 -3.7300E-03 9.3646E-03 -1.6670E-02 1.6337E-02 -9.1700E-03 2.8490E-03 -4.5000E-04 2.7900E-05
S4 4.4983E-02 -4.3360E-02 4.3923E-02 -4.8900E-02 4.5607E-02 -3.0090E-02 1.2675E-02 -3.0300E-03 3.1100E-04
S7 -1.6570E-02 1.4297E-02 -5.7964E-02 9.7634E-02 -1.0076E-01 6.4113E-02 -2.4420E-02 5.0520E-03 -4.3000E-04
S8 -8.3430E-02 1.3747E-01 -2.9592E-01 4.1771E-01 -3.8203E-01 2.2231E-01 -7.9030E-02 1.5582E-02 -1.3000E-03
S9 -1.1371E-01 1.7595E-01 -3.3566E-01 4.5776E-01 -4.1451E-01 2.4169E-01 -8.6680E-02 1.7337E-02 -1.4800E-03
S10 -5.0090E-02 3.3686E-02 -2.3450E-02 1.1235E-02 -2.5800E-03 -4.3000E-04 4.5600E-04 -1.1000E-04 9.8900E-06
Table 12
Fig. 12A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 6, which indicates a convergent focus deviation of light rays of different wavelengths after passing through the lens. Fig. 12B shows an astigmatism curve of the optical imaging lens of embodiment 6, which represents meridional image plane curvature and sagittal image plane curvature. Fig. 12C shows a distortion curve of the optical imaging lens of embodiment 6, which represents distortion magnitude values corresponding to different angles of view. Fig. 12D shows a magnification chromatic aberration curve of the optical imaging lens of embodiment 6, which represents the deviation of different image heights on the imaging plane after light passes through the lens. As can be seen from fig. 12A to 12D, the optical imaging lens provided in embodiment 6 can achieve good imaging quality.
Example 7
An optical imaging lens according to embodiment 7 of the present application is described below with reference to fig. 13 to 14D. Fig. 13 shows a schematic configuration diagram of an optical imaging lens according to embodiment 7 of the present application.
As shown in fig. 13, the optical imaging lens sequentially includes, from an object side to an image side along an optical axis: stop STO, first lens E1, second lens E2, third lens E3, fourth lens E4, fifth lens E5, filter E6 and imaging surface S13.
The first lens element E1 has positive refractive power, wherein an object-side surface S1 thereof is convex, and an image-side surface S2 thereof is concave. The second lens element E2 has negative refractive power, wherein an object-side surface S3 thereof is convex, and an image-side surface S4 thereof is concave. The third lens element E3 has positive refractive power, wherein an object-side surface S5 thereof is convex, and an image-side surface S6 thereof is convex. The fourth lens element E4 has positive refractive power, wherein an object-side surface S7 thereof is convex, and an image-side surface S8 thereof is convex. The fifth lens element E5 has negative refractive power, wherein an object-side surface S9 thereof is concave, and an image-side surface S10 thereof is concave. The filter E8 has an object side surface S11 and an image side surface S12. Light from the object sequentially passes through the respective surfaces S1 to S12 and is finally imaged on the imaging surface S13.
In the present embodiment, the total effective focal length f=12.80 mm of the optical imaging lens, the distance ttl=12.95 mm on the optical axis from the object side surface S1 of the first lens E1 to the imaging surface S13, half of the diagonal length imgh=2.61 mm of the effective pixel area on the imaging surface S13, and the maximum field angle fov=22.8° of the optical imaging lens.
Table 13 shows a basic parameter table of the optical imaging lens of embodiment 7, in which the units of radius of curvature, thickness/distance, and focal length are all millimeters (mm). Table 14 shows the higher order coefficients that can be used for each of the aspherical mirror surfaces in example 7.
TABLE 13
Face number A4 A6 A8 A10 A12 A14 A16 A18 A20
S1 1.7200E-04 2.2006E-04 -3.7000E-04 4.1700E-04 -2.9000E-04 1.2100E-04 -3.1000E-05 4.3000E-06 -2.6000E-07
S2 4.4380E-03 5.6027E-03 -8.5700E-03 1.1417E-02 -9.5800E-03 4.6240E-03 -1.1400E-03 8.2500E-05 9.5000E-06
S3 -1.9980E-02 9.2087E-03 -1.5170E-02 2.3884E-02 -2.4580E-02 1.5407E-02 -5.7300E-03 1.1420E-03 -9.2000E-05
S4 5.6395E-02 -7.8682E-02 8.6997E-02 -8.0380E-02 5.6312E-02 -2.8070E-02 9.2620E-03 -1.8100E-03 1.5800E-04
S7 -4.5150E-02 4.7352E-02 -1.0076E-01 1.3606E-01 -1.1963E-01 6.7288E-02 -2.3180E-02 4.3830E-03 -3.4000E-04
S8 -1.0976E-01 2.2091E-01 -3.6592E-01 3.9648E-01 -2.9231E-01 1.4488E-01 -4.5770E-02 8.2400E-03 -6.4000E-04
S9 -1.2904E-01 3.0762E-01 -4.9331E-01 4.9690E-01 -3.3481E-01 1.5166E-01 -4.4180E-02 7.4480E-03 -5.5000E-04
S10 -8.9000E-03 5.9413E-02 -1.1105E-01 1.0686E-01 -6.3230E-02 2.3661E-02 -5.4200E-03 6.8900E-04 -3.7000E-05
TABLE 14
Fig. 14A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 7, which indicates a convergent focus deviation of light rays of different wavelengths after passing through the lens. Fig. 14B shows an astigmatism curve of the optical imaging lens of embodiment 7, which represents meridional image plane curvature and sagittal image plane curvature. Fig. 14C shows a distortion curve of the optical imaging lens of embodiment 7, which represents distortion magnitude values corresponding to different angles of view. Fig. 14D shows a magnification chromatic aberration curve of the optical imaging lens of embodiment 7, which represents the deviation of different image heights on the imaging plane after light passes through the lens. As can be seen from fig. 14A to 14D, the optical imaging lens provided in embodiment 7 can achieve good imaging quality.
Example 8
An optical imaging lens according to embodiment 8 of the present application is described below with reference to fig. 15 to 16D. Fig. 15 shows a schematic structural diagram of an optical imaging lens according to embodiment 8 of the present application.
As shown in fig. 15, the optical imaging lens sequentially includes, from an object side to an image side along an optical axis: stop STO, first lens E1, second lens E2, third lens E3, fourth lens E4, fifth lens E5, filter E6 and imaging surface S13.
The first lens element E1 has positive refractive power, wherein an object-side surface S1 thereof is convex, and an image-side surface S2 thereof is concave. The second lens element E2 has negative refractive power, wherein an object-side surface S3 thereof is convex, and an image-side surface S4 thereof is concave. The third lens element E3 has positive refractive power, wherein an object-side surface S5 thereof is convex, and an image-side surface S6 thereof is convex. The fourth lens element E4 has positive refractive power, wherein an object-side surface S7 thereof is concave and an image-side surface S8 thereof is convex. The fifth lens element E5 has negative refractive power, wherein an object-side surface S9 thereof is concave and an image-side surface S10 thereof is convex. The filter E8 has an object side surface S11 and an image side surface S12. Light from the object sequentially passes through the respective surfaces S1 to S12 and is finally imaged on the imaging surface S13.
In the present embodiment, the total effective focal length f=13.06 mm of the optical imaging lens, the distance ttl=12.90 mm on the optical axis from the object side surface S1 of the first lens E1 to the imaging surface S13, half of the diagonal length imgh=2.65 mm of the effective pixel area on the imaging surface S13, and the maximum field angle fov=22.7° of the optical imaging lens.
Table 15 shows a basic parameter table of the optical imaging lens of example 8, in which the units of radius of curvature, thickness/distance, and focal length are all millimeters (mm). Table 16 shows the higher order coefficients that can be used for each of the aspherical mirror surfaces in example 8.
TABLE 15
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Table 16
Fig. 16A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 8, which indicates a convergent focus deviation of light rays of different wavelengths after passing through the lens. Fig. 16B shows an astigmatism curve of the optical imaging lens of embodiment 8, which represents meridional image plane curvature and sagittal image plane curvature. Fig. 16C shows a distortion curve of the optical imaging lens of embodiment 8, which represents distortion magnitude values corresponding to different angles of view. Fig. 16D shows a magnification chromatic aberration curve of the optical imaging lens of embodiment 8, which represents the deviation of different image heights on the imaging plane after light passes through the lens. As can be seen from fig. 16A to 16D, the optical imaging lens provided in embodiment 8 can achieve good imaging quality.
In summary, examples 1 to 8 each satisfy the relationship shown in table 17.
Condition/example 1 2 3 4 5 6 7 8
ImgH/f 0.19 0.19 0.19 0.20 0.20 0.20 0.20 0.20
f(mm) 14.44 14.35 13.50 13.30 13.13 13.23 12.80 13.06
(R1+R5)/(f1+f3) 0.38 0.37 0.36 0.32 0.49 0.47 0.57 0.50
f2/f5 0.92 0.90 0.70 0.29 1.31 0.69 0.66 0.68
FOV(°) 21.0 21.2 21.0 22.9 22.9 22.5 22.8 22.7
TTL/f 0.88 0.88 0.94 0.98 0.97 0.97 1.01 0.99
R4/(R8+R9) -0.50 -0.55 -0.48 -0.25 -0.22 -0.38 -0.14 -0.35
CT1/TTL×10 2.00 2.02 2.07 1.96 2.23 2.20 2.08 2.25
f123/f45 -0.55 -0.53 -0.39 -0.39 -0.78 -0.48 -0.57 -0.52
T34/BFL 0.50 0.51 0.30 0.24 0.34 0.30 0.26 0.28
SAG31/SAG11 0.55 0.60 0.64 0.74 1.20 0.56 0.52 0.59
(SAG51+SAG52)/(SAG41+SAG42) 0.73 0.73 0.62 0.68 0.29 0.84 0.76 0.83
TABLE 17
The above description is only illustrative of the preferred embodiments of the present application and of the principles of the technology employed. It will be appreciated by persons skilled in the art that the scope of the application referred to in the present application is not limited to the specific combinations of the technical features described above, but also covers other technical features formed by any combination of the technical features described above or their equivalents without departing from the inventive concept. Such as the above-mentioned features and the technical features disclosed in the present application (but not limited to) having similar functions are replaced with each other.

Claims (12)

1. An optical imaging lens, comprising, in order from an object side to an image side along an optical axis:
a first lens having positive optical power;
a second lens having negative optical power;
a third lens having positive optical power;
a fourth lens having positive optical power, the image-side surface of which is convex; and
a fifth lens with negative focal power, the object side surface of which is a concave surface;
the number of lenses with focal power in the optical imaging lens is five;
wherein, the liquid crystal display device comprises a liquid crystal display device,
the total effective focal length f of the optical imaging lens satisfies: 12mm < f <20mm;
half of the diagonal length ImgH of the effective pixel area on the imaging surface of the optical imaging lens and the total effective focal length f of the optical imaging lens satisfy the following conditions: imgH/f <0.3; and
the effective focal length f2 of the second lens and the effective focal length f5 of the fifth lens satisfy: 0.2< f2/f5<1.4.
2. The optical imaging lens of claim 1, wherein a radius of curvature R1 of an object side of the first lens, a radius of curvature R5 of an object side of the third lens, an effective focal length f1 of the first lens, and an effective focal length f3 of the third lens satisfy:
0.2<(R1+R5)/(f1+f3)<0.7。
3. the optical imaging lens of claim 1, wherein a maximum field angle FOV of the optical imaging lens satisfies:
FOV<25°。
4. the optical imaging lens as claimed in claim 1, wherein a distance TTL from an object side surface of the first lens to an imaging surface of the optical imaging lens on the optical axis and a total effective focal length f of the optical imaging lens satisfy:
TTL/f<1.1。
5. the optical imaging lens of claim 1, wherein a radius of curvature R4 of an image side of the second lens, a radius of curvature R8 of an image side of the fourth lens, and a radius of curvature R9 of an object side of the fifth lens satisfy:
-0.6<R4/(R8+R9)<-0.1。
6. the optical imaging lens as claimed in claim 1, wherein a center thickness CT1 of the first lens on the optical axis and a distance TTL between an object side surface of the first lens and an imaging surface of the optical imaging lens on the optical axis satisfy:
1.8<CT1/TTL×10<2.3。
7. the optical imaging lens of claim 1, wherein a combined focal length f123 of the first lens, the second lens, and the third lens and a combined focal length f45 of the fourth lens and the fifth lens satisfy:
-0.8<f123/f45<-0.3。
8. the optical imaging lens as claimed in claim 1, wherein a separation distance T34 of the third lens and the fourth lens on the optical axis and a distance BFL of an image side surface of the fifth lens to an imaging surface of the optical imaging lens on the optical axis satisfy:
0.2<T34/BFL<0.6。
9. the optical imaging lens of claim 1, wherein an on-axis distance SAG31 from an intersection of the object side surface of the third lens and the optical axis to an effective radius vertex of the object side surface of the third lens and an on-axis distance SAG11 from an intersection of the object side surface of the first lens and the optical axis to an effective radius vertex of the object side surface of the first lens satisfy:
0.5<SAG31/SAG11<1.3。
10. the optical imaging lens according to claim 1, wherein an on-axis distance SAG51 from an intersection of the object side surface of the fifth lens and the optical axis to an effective radius vertex of the object side surface of the fifth lens, an on-axis distance SAG52 from an intersection of the image side surface of the fifth lens and the optical axis to an effective radius vertex of the image side surface of the fifth lens, an on-axis distance SAG41 from an intersection of the object side surface of the fourth lens and the optical axis to an effective radius vertex of the object side surface of the fourth lens and an on-axis distance SAG42 from an intersection of the image side surface of the fourth lens and the optical axis to an effective radius vertex of the image side surface of the fourth lens satisfy:
0.2<(SAG51+SAG52)/(SAG41+SAG42)<0.9。
11. the optical imaging lens of any of claims 1 to 10, wherein at least one of the first to fifth lenses is a glass lens.
12. The optical imaging lens of any of claims 1 to 10, wherein an object side surface and an image side surface of at least one of the first lens element to the fifth lens element are spherical.
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