CN114967071B - Optical imaging lens - Google Patents

Optical imaging lens Download PDF

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Publication number
CN114967071B
CN114967071B CN202210638679.1A CN202210638679A CN114967071B CN 114967071 B CN114967071 B CN 114967071B CN 202210638679 A CN202210638679 A CN 202210638679A CN 114967071 B CN114967071 B CN 114967071B
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China
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lens
optical imaging
curvature
imaging lens
optical
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CN114967071A (en
Inventor
柯再霖
邢天祥
黄林
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
    • G02B13/06—Panoramic objectives; So-called "sky lenses" including panoramic objectives having reflecting surfaces
    • 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
    • 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
    • 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

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Lenses (AREA)

Abstract

The application discloses an optical imaging lens, which sequentially comprises the following components from an object side to an image side along an optical axis: a first lens having negative optical power; a second lens having positive optical power; a third lens having positive optical power; a fourth lens having negative optical power; a fifth lens having positive optical power; a sixth lens having optical power; the effective focal length f2 of the second lens, the effective focal length f5 of the fifth lens, the curvature radius R4 of the image side surface of the second lens, the curvature radius R5 of the object side surface of the third lens and the curvature radius R6 of the image side surface of the third lens satisfy the following conditions: 6.7mm 2 <f2×R4‑f5×(R5‑R6)<8.8mm 2 。

Description

Optical imaging lens
Technical Field
The application relates to the field of optical elements, in particular to an optical imaging lens.
Background
With the continuous improvement of the technical capability of portable electronic devices, the current trend of using mobile phone to pick up images instead of traditional cameras is more and more obvious, and meanwhile, the public is more and more favored for mobile phones with high-quality photographing function; as is well known, the basic characteristics of the wide-angle lens are large viewing angle, wide visual field and Jing Shenchang, more clear background can be accommodated during self-shooting, and meanwhile, the size of a face can be visually reduced, so that a photo is more attractive, and meanwhile, a picture shot by the wide-angle lens often has a strong space perspective sense and an shocking tension effect, so that more and more mobile phones support wide-angle shooting at present.
In order to meet the miniaturization requirement of electronic devices such as mobile phones, the imaging lens needs to reduce the number of lenses as much as possible, but the lack of design freedom caused by the reduction of the number of lenses can hardly meet the requirement of high imaging performance in the market. The design with less design freedom can reduce the production cost and the assembly cost, so the design of the six-piece optical imaging lens with low optical distortion, which is applicable to portable electronic products, has important practical significance.
Disclosure of Invention
The present application provides an optical imaging lens comprising, in order from an object side to an image side along an optical axis: a first lens having negative optical power; a second lens having positive optical power; a third lens having positive optical power; a fourth lens having negative optical power; a fifth lens having positive optical power; a sixth lens having optical power; the effective focal length f2 of the second lens element, the effective focal length f5 of the fifth lens element, the radius of curvature R4 of the image-side surface of the second lens element, the radius of curvature R5 of the object-side surface of the third lens element and the radius of curvature R6 of the image-side surface of the third lens element satisfy the following conditions: 6.7mm 2 <f2×R4-f5×(R5-R6)<8.8mm 2 。
In one embodiment, the radius of curvature R2 of the image side of the first lens, the radius of curvature R3 of the object side of the second lens, and the air space T12 of the first lens and the second lens on the optical axis satisfy: 3.0 < (R2-T12)/(R3-T12) < 4.0.
In one embodiment, the maximum field angle FOV of the optical imaging lens satisfies: the FOV is more than or equal to 120 degrees.
In one embodiment, the effective focal length f4 of the fourth lens and the air interval T45 of the fourth lens and the fifth lens on the optical axis satisfy: -32.0 < f4/T45 < -20.0.
In one embodiment, the effective focal length f5 of the fifth lens and the air interval T56 of the fifth lens and the sixth lens on the optical axis satisfy: f5/T56 is less than 8.1 and more than 5.8.
In one embodiment, the radius of curvature R8 of the image side surface of the fourth lens and the air interval T34 of the third lens and the fourth lens on the optical axis satisfy: R8/T34 is more than 6.7 and less than 10.1.
In one embodiment, the radius of curvature R2 of the image side surface of the first lens and the air interval T12 of the first lens and the second lens on the optical axis satisfy: R2/T12 is more than 7.0 and less than 9.5.
In one embodiment, the radius of curvature R10 of the image side of the fifth lens, the radius of curvature R11 of the object side of the sixth lens, the radius of curvature R12 of the image side of the sixth lens, and the effective focal length f of the optical imaging lens satisfy: -f/(R10+R11+R12) < -2.0.
In one embodiment, the on-axis distance TD from the object side surface of the first lens element to the image side surface of the sixth lens element, the center thickness CT4 of the fourth lens element on the optical axis, and the center thickness CT5 of the fifth lens element on the optical axis satisfy: 4.5< TD/(CT4+CT5) < 5.2.
In one embodiment, the radius of curvature R1 of the object side surface of the first lens and the center thickness CT1 of the first lens on the optical axis satisfy: -9.0 < R1/CT1 < -6.0.
In one embodiment, the radius of curvature R1 of the object side surface of the first lens and the center thickness CT2 of the second lens on the optical axis satisfy: -9.5 < R1/CT 2< -8.5.
In one embodiment, the radius of curvature R5 of the object-side surface of the third lens and the radius of curvature R11 of the object-side surface of the sixth lens satisfy: R5/R11 is more than 2.0 and less than 2.6.
In one embodiment, the curvature radius R10 of the image side surface of the fifth lens and the center thickness CT5 of the fifth lens on the optical axis satisfy: -3.8 < R10/CT 5< -2.5.
In one embodiment, the radius of curvature R1 of the object side surface of the first lens and the air space T12 of the first lens and the second lens on the optical axis satisfy: -4.5< R1/T12< -4.0.
The optical imaging lens adopts six lenses, and the lower-order aberration of the system is effectively balanced and controlled by reasonably distributing the focal power of each lens; the first lens with negative focal power is beneficial to increasing the angle of view, and simultaneously, the effective focal length of the second lens, the effective focal length of the fifth lens and the curvature radiuses of the second lens and the third lens are controlled within a reasonable range, so that the optical sensitivity of the second lens and the third lens is effectively reduced, mass production is more beneficial to realization, the optical distortion size can be reduced, and the optical imaging lens is ensured to have better imaging quality.
Drawings
Other features, objects and advantages of the present application will become more apparent upon reading of the detailed description of non-limiting embodiments, made with reference to the accompanying drawings in which:
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; and
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.
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 six lenses having optical power, which are a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens, respectively. The six lenses are arranged in order from the object side to the image side along the optical axis. Any two adjacent lenses from the first lens to the sixth lens can have a spacing distance therebetween.
In an exemplary embodiment, the first lens may have negative optical power; the second lens may have positive optical power; the third lens may have positive optical power; the fourth lens may have negative optical power; the fifth lens may have positive optical power; and the sixth lens may have positive or negative optical power. The surface type of the optical imaging lens is beneficial to ensuring that the distribution of the focal power of the optical imaging lens is more reasonable under the condition that the size of the optical imaging lens is not too large, and is important to improving the aberration correction capability of the optical imaging lens and reducing the sensitivity of the optical imaging lens.
In an exemplary embodiment, the optical imaging lens according to an exemplary embodiment of the present application further includes a stop disposed between the second lens and the third lens. The first lens with negative focal power is beneficial to increasing the angle of view, simultaneously is beneficial to compressing the incidence angle of light rays at the diaphragm position, reducing the pupil aberration and improving the imaging quality; the diaphragm is arranged in the middle, so that a symmetrical structure is realized, and the correction of off-axis aberration is facilitated; the second lens and the third lens which are positioned at the two sides of the diaphragm and have positive focal power are favorable for correcting spherical aberration and coma, and the last three lenses (namely the fourth lens, the fifth lens and the sixth lens) adopt negative positive and negative or negative positive focal power combinations and are favorable for balancing chromatic dispersion, distortion and chromatic aberration of magnification.
In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: 6.7mm 2 <f2×R4-f5×(R5-R6)<8.8mm 2 Where f2 is the effective focal length of the second lens element, f5 is the effective focal length of the fifth lens element, R4 is the radius of curvature of the image side of the second lens element, R5 is the radius of curvature of the object side of the third lens element, and R6 is the radius of curvature of the image side of the third lens element. More specifically, f2, R4, f5, R5, and R6 may further satisfy: 6.70mm 2 <f2×R4-f5×(R5-R6)<8.72mm 2 . Satisfy 6.7mm 2 <f2×R4-f5×(R5-R6)<8.8mm 2 The optical sensitivity of the second lens and the third lens can be effectively reduced, mass production is more facilitated, the optical distortion can be reduced, and the optical imaging lens is ensured to have better imaging quality.
In an exemplary embodiment, half of the effective pixel area diagonal length ImgH on the imaging surface of the optical imaging lens may be, for example, in the range of 3.0mm to 4.0mm, with ImgH being 3.42mm, for example.
The maximum half field angle Semi-FOV of the optical imaging lens satisfies: the Semi-FOV >60, the Semi-FOV may be, for example, in the range of 60.0 to 61.5.
In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: 3.0 < (R2-T12)/(R3-T12) < 4.0, wherein R2 is the radius of curvature of the image side of the first lens, R3 is the radius of curvature of the object side of the second lens, and T12 is the air gap between the first lens and the second lens on the optical axis. More specifically, R2, R3, and T12 may further satisfy: 3.21 < (R2-T12)/(R3-T12) < 3.71. Satisfies that (R2-T12)/(R3-T12) is less than 4.0, is favorable for reasonably controlling the range of residual distortion after balance, ensures that the optical imaging lens has good distortion performance and ensures reasonable processability of the lens.
In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: FOV is larger than or equal to 120 degrees, wherein FOV is the maximum field angle of the optical imaging lens. The FOV is more than or equal to 120 degrees, and the imaging range of the optical imaging lens is effectively controlled by controlling the full field angle.
In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: -32.0 < f4/T45 < -20.0, wherein f4 is the effective focal length of the fourth lens and T45 is the air separation of the fourth and fifth lenses on the optical axis. More specifically, f4 and T45 may further satisfy: 31.45 < f4/T45 < -21.26. Satisfies-32.0 < f4/T45 < -20.0, is favorable for effectively controlling the coma aberration performance of the optical imaging lens, and enables the imaging quality of the optical imaging lens in the meridian direction and the sagittal direction to be close.
In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: 5.8 < f5/T56 < 8.1, where f5 is the effective focal length of the fifth lens and T56 is the air separation of the fifth and sixth lenses on the optical axis. More specifically, f5 and T56 further satisfy: 5.84 < f5/T56 < 8.02. Satisfies 5.8 < f5/T56 < 8.1, is favorable for effectively controlling the coma aberration performance of the optical imaging lens, and enables the imaging quality of the optical imaging lens in the meridian direction and the sagittal direction to be close.
In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: 6.7 < R8/T34 < 10.1, wherein R8 is the radius of curvature of the image side of the fourth lens, and T34 is the air separation of the third lens and the fourth lens on the optical axis. More specifically, R8 and T34 may further satisfy: R8/T34 is more than 6.78 and less than 10.03. Satisfies R8/T34 < 10.1, and can effectively control the refraction angle of the light beam of the optical imaging lens in the fourth lens, thereby realizing good processing characteristics of the optical imaging lens.
In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: 7.0 < R2/T12 < 9.5, wherein R2 is the radius of curvature of the image side of the first lens and T12 is the air separation of the first and second lenses on the optical axis. More specifically, R2 and T12 may further satisfy: R2/T12 is more than 7.60 and less than 9.16. Satisfies 7.0 < R2/T12 < 9.5, is favorable for easily balancing the Pittzval (petzval) field curvature, the 5-order spherical aberration and the chromatic spherical aberration thereof, and further ensures that the optical imaging lens obtains good imaging quality and lower system sensitivity, thereby better ensuring the processability of the optical imaging lens.
In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: -10.0 +.f/(R10+R11+R12) < -2.0, where f is the effective focal length of the optical imaging lens, R10 is the radius of curvature of the image side of the fifth lens, R11 is the radius of curvature of the object side of the sixth lens, and R12 is the radius of curvature of the image side of the sixth lens. More specifically, f, R10, R11, and R12 may further satisfy: -f/(R10+R11+R12) < -2.81 of 10.0. Satisfies f/(R10+R11+R12) < -2.0, is favorable for better correcting chromatic aberration and improves imaging quality; while avoiding the problem of increased tolerance sensitivity of the optical imaging lens due to excessive bending of the image side surface of the fifth lens and the surface of the sixth lens.
In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: 4.5< TD/(CT4+CT5) < 5.2, where TD is the on-axis distance from the object side of the first lens to the image side of the sixth lens, CT4 is the center thickness of the fourth lens on the optical axis, and CT5 is the center thickness of the fifth lens on the optical axis. More specifically, TD, CT4, and CT5 may further satisfy: 4.55 < TD/(CT4+CT5) < 5.20. Satisfies the condition that TD/(CT4+CT5) < 5.2, is favorable for ensuring that the optical imaging lens has good machinability, and can reasonably control the range of residual distortion after balancing, so that the optical imaging lens has good distortion performance.
In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: -9.0 < R1/CT1 < -6.0, wherein R1 is the radius of curvature of the object side of the first lens and CT1 is the central thickness of the first lens on the optical axis. More specifically, R1 and CT1 may further satisfy: -6.42 < R1/CT1 < -6.17. Satisfies R1/CT1 < -6.0 > and is favorable for ensuring the processability of the first lens.
In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: -9.5 < R1/CT 2< -8.5, wherein R1 is the radius of curvature of the object side of the first lens and CT2 is the center thickness of the second lens on the optical axis. More specifically, R1 and CT2 may further satisfy: -9.33 < R1/CT 2< -8.75. Satisfies R1/CT2 less than 8.5 and is beneficial to controlling the deflection direction of incident light and the thickness of the center of the second lens on the optical axis, thereby ensuring the processing characteristics of the second lens.
In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: 2.0 < R5/R11 < 2.6, wherein R5 is the radius of curvature of the object-side surface of the third lens and R11 is the radius of curvature of the object-side surface of the sixth lens. More specifically, R5 and R11 may further satisfy: R5/R11 is more than 2.25 and less than 2.60. Satisfies R5/R11 more than 2.0 and less than 2.6, is favorable for balancing the aberration of the optical imaging lens and improves the imaging quality of the optical imaging lens.
In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: -3.8 < R10/CT 5< -2.5, wherein R10 is the radius of curvature of the image side of the fifth lens and CT5 is the central thickness of the fifth lens on the optical axis. Satisfying R10/CT 5< -2.5, is beneficial to controlling the field curvature contribution of the image side surface of the fifth lens within a reasonable range so as to balance the generated field curvature of the front lens.
In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: -4.5< R1/T12< -4.0, wherein R1 is the radius of curvature of the object side of the first lens and T12 is the air separation of the first and second lenses on the optical axis. More specifically, R1 and T12 may further satisfy: -4.40< R1/T12< -4.20. Satisfying-4.5 < R1/T12< -4.0, being beneficial to controlling the curvature of the object side surface of the first lens, leading the field curvature contribution quantity to be in a reasonable range and reducing the optical sensitivity of the object side surface of the first lens.
In an exemplary embodiment, the effective focal length f1 of the first lens may be, for example, in the range of-3.38 mm to-3.27 mm, the effective focal length f2 of the second lens may be, for example, in the range of 7.22mm to 7.50mm, the effective focal length f3 of the third lens may be, for example, in the range of 2.29mm to 2.43mm, the effective focal length f4 of the fourth lens may be, for example, in the range of-4.07 mm to-3.26 mm, the effective focal length f5 of the fifth lens may be, for example, in the range of 3.26mm to 4.14mm, the effective focal length f6 of the sixth lens may be, for example, in the range of-47.01 mm to 602.71mm, and the effective focal length f of the optical imaging lens may be, for example, in the range of 2.02mm to 2.08 mm. 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 5.95mm < TTL <6.14mm.
In an exemplary embodiment, the optical imaging lens according to the present application further includes a filter for correcting color deviation and/or a protective glass for protecting a photosensitive element located on an imaging surface. The optical imaging lens according to the above embodiment of the present application may employ a plurality of lenses, for example, the above six lenses. By reasonably distributing the focal power, the surface shape, the center thickness of each lens, the axial spacing between each lens and the like of each lens, the low-order aberration of the optical imaging lens can be effectively balanced and controlled, and the sensitivity of the tolerance of the optical imaging lens can be reduced, so that the miniaturization of the optical imaging lens is maintained.
In an embodiment of the present application, at least one of the mirror surfaces of each of the first to sixth lenses is an aspherical mirror surface. 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 during imaging can be eliminated as much as possible, thereby improving imaging quality. Optionally, the object side surface and the image side surface of each of the first lens to the sixth lens are aspherical mirror surfaces.
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 six lenses are described as an example in the embodiment, the optical imaging lens is not limited to include six 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 shows a schematic configuration diagram 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: a first lens E1, a second lens E2, a stop STO, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter E7, and an imaging surface S15.
The first lens element E1 has negative refractive power, wherein an object-side surface S1 thereof is concave, and an image-side surface S2 thereof is concave. The second lens element E2 has positive 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 negative refractive power, wherein an object-side surface S7 thereof is concave, and an image-side surface S8 thereof is concave. The fifth lens element E5 has positive refractive power, wherein an object-side surface S9 thereof is convex, and an image-side surface S10 thereof is convex. The sixth lens element E6 has negative refractive power, wherein an object-side surface S11 thereof is convex and an image-side surface S12 thereof is concave. The filter E7 has an object side surface S13 and an image side surface S14. Light from the object sequentially passes through the respective surfaces S1 to S14 and is finally imaged on the imaging surface S15.
In this example, the effective focal length f of the optical imaging lens is 2.07mm, the total length TTL of the optical imaging lens (i.e., the distance on the optical axis from the object side surface S1 of the first lens E1 to the imaging surface S15 of the optical imaging lens) is 6.05mm, half of the diagonal length ImgH of the effective pixel area on the imaging surface S15 of the optical imaging lens is 3.42mm, and half of the maximum field angle Semi-FOV of the optical imaging lens is 60.8 °.
Table 1 shows the basic parameter table of the optical imaging lens of embodiment 1, in which the units of the radius of curvature, the thickness, and the effective focal length are all millimeters (mm).
TABLE 1
In embodiment 1, the object side surface and the image side surface of any one of the first lens E1 to the sixth lens E6 are aspherical, and the surface profile x of each aspherical lens can be defined by, but not limited to, the following aspherical 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. The following tables 2-1 and 2-2 give the higher order coefficients A that can be used for each of the aspherical mirror faces S1-S12 in example 1 4 、A 6 、A 8 、A 10 、A 12 、A 14 、A 16 、A 18 、A 20 、A 22 、A 24 、A 26 、A 28 And A 30 。
Face number A4 A6 A8 A10 A12 A14 A16
S1 1.4700E+00 -2.4621E-01 6.7072E-02 -2.3978E-02 8.8638E-03 -3.4771E-03 1.3669E-03
S2 5.9248E-01 -1.7597E-01 3.3725E-03 6.2631E-03 5.1462E-03 -2.1610E-03 -1.0874E-03
S3 -2.4664E-01 -7.5212E-03 1.2819E-02 -1.4329E-03 -1.8070E-03 -1.4599E-04 2.2330E-04
S4 -3.0790E-02 6.0579E-03 5.4775E-03 1.1101E-03 2.0759E-04 1.3985E-05 9.9066E-06
S5 1.2116E-02 -3.4386E-04 -1.3673E-04 -6.4095E-05 -8.3971E-05 -7.9536E-05 -6.8878E-05
S6 -5.2270E-02 -1.2737E-04 -7.7020E-07 2.0536E-04 1.0290E-04 3.7046E-05 1.5927E-05
S7 -2.3281E-01 4.4350E-03 -1.7423E-03 1.3545E-03 6.3198E-04 3.6963E-04 2.9430E-05
S8 -3.0961E-01 7.3906E-02 -1.0124E-02 5.6624E-03 1.8474E-04 9.6788E-04 -2.7478E-04
S9 -1.9526E-01 3.6301E-02 -1.0669E-02 2.3853E-03 -2.1646E-03 4.6320E-04 -3.7051E-04
S10 -1.6685E-01 1.1811E-01 -2.2421E-02 4.6537E-03 -8.4471E-03 -4.9529E-04 -3.2836E-04
S11 -4.2040E+00 1.0481E+00 -2.5842E-01 6.4111E-02 -3.6590E-02 2.0758E-02 -6.2941E-03
S12 -5.7353E+00 1.1167E+00 -3.2973E-01 1.4539E-01 -5.9279E-02 2.3488E-02 -1.4152E-02
TABLE 2-1
TABLE 2-2
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 image heights. 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. In this embodiment and the following embodiments, descriptions of portions similar to embodiment 1 will be omitted for brevity. 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: a first lens E1, a second lens E2, a stop STO, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter E7, and an imaging surface S15.
The first lens element E1 has negative refractive power, wherein an object-side surface S1 thereof is concave, and an image-side surface S2 thereof is concave. The second lens element E2 has positive 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 negative refractive power, wherein an object-side surface S7 thereof is concave, and an image-side surface S8 thereof is concave. The fifth lens element E5 has positive refractive power, wherein an object-side surface S9 thereof is convex, and an image-side surface S10 thereof is convex. The sixth lens element E6 has negative refractive power, wherein an object-side surface S11 thereof is convex and an image-side surface S12 thereof is concave. The filter E7 has an object side surface S13 and an image side surface S14. Light from the object sequentially passes through the respective surfaces S1 to S14 and is finally imaged on the imaging surface S15.
In this example, the effective focal length f of the optical imaging lens is 2.03mm, the total length TTL of the optical imaging lens (i.e., the distance on the optical axis from the object side surface S1 of the first lens E1 to the imaging surface S15 of the optical imaging lens) is 5.96mm, half of the diagonal length ImgH of the effective pixel area on the imaging surface S15 of the optical imaging lens is 3.42mm, and half of the maximum field angle Semi-FOV of the optical imaging lens is 60.8 °.
Table 3 shows the basic parameter table of the optical imaging lens of embodiment 2, in which the units of the radius of curvature, the thickness, and the effective focal length are all millimeters (mm). Tables 4-1 and 4-2 show the higher order coefficients that can be used for each of the aspherical mirror surfaces in example 2, wherein each of the aspherical surface profiles can be defined by the formula (1) given in example 1 above.
TABLE 3 Table 3
Face number A4 A6 A8 A10 A12 A14 A16
S1 1.4892E+00 -2.4243E-01 6.7910E-02 -2.4413E-02 8.8568E-03 -3.4213E-03 1.3821E-03
S2 5.9089E-01 -1.7331E-01 3.3215E-03 5.8419E-03 5.3648E-03 -1.9593E-03 -1.2273E-03
S3 -2.4770E-01 -4.8026E-03 1.2071E-02 -1.4378E-03 -1.6041E-03 -2.1152E-04 1.3238E-04
S4 -3.2013E-02 6.3494E-03 5.2577E-03 1.1039E-03 3.3504E-04 1.2349E-04 9.9348E-05
S5 1.1603E-02 -6.2723E-04 -2.1976E-04 -8.9009E-05 -8.1622E-05 -6.7847E-05 -5.3130E-05
S6 -5.2417E-02 -4.2668E-04 -1.1296E-04 1.5195E-04 1.2887E-04 8.6613E-05 7.5320E-05
S7 -2.3799E-01 4.7398E-03 -5.5852E-04 9.2171E-04 4.9243E-04 2.9965E-04 3.9174E-05
S8 -3.1465E-01 7.4910E-02 -7.3251E-03 4.0372E-03 1.8819E-04 1.0291E-03 -7.8757E-05
S9 -2.0005E-01 3.7996E-02 -8.9256E-03 3.9468E-03 -2.1494E-03 6.1600E-04 -4.1667E-04
S10 -1.7738E-01 1.1661E-01 -2.5638E-02 2.8959E-03 -9.6768E-03 -8.0011E-04 6.7942E-04
S11 -4.1934E+00 1.0493E+00 -2.6269E-01 6.4192E-02 -3.4748E-02 1.9430E-02 -5.6677E-03
S12 -5.7269E+00 1.1330E+00 -3.3576E-01 1.4421E-01 -6.1028E-02 2.3876E-02 -1.3972E-02
TABLE 4-1
TABLE 4-2
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 image heights. 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: a first lens E1, a second lens E2, a stop STO, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter E7, and an imaging surface S15.
The first lens element E1 has negative refractive power, wherein an object-side surface S1 thereof is concave, and an image-side surface S2 thereof is concave. The second lens element E2 has positive 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 negative refractive power, wherein an object-side surface S7 thereof is concave, and an image-side surface S8 thereof is concave. The fifth lens element E5 has positive refractive power, wherein an object-side surface S9 thereof is concave and an image-side surface S10 thereof is convex. The sixth lens element E6 has negative refractive power, wherein an object-side surface S11 thereof is convex and an image-side surface S12 thereof is concave. The filter E7 has an object side surface S13 and an image side surface S14. Light from the object sequentially passes through the respective surfaces S1 to S14 and is finally imaged on the imaging surface S15.
In this example, the effective focal length f of the optical imaging lens is 2.06mm, the total length TTL of the optical imaging lens (i.e., the distance on the optical axis from the object side surface S1 of the first lens E1 to the imaging surface S15 of the optical imaging lens) is 6.13mm, half of the diagonal length ImgH of the effective pixel area on the imaging surface S15 of the optical imaging lens is 3.42mm, and half of the maximum field angle Semi-FOV of the optical imaging lens is 61.2 °.
Table 5 shows the basic parameter table of the optical imaging lens of embodiment 3, in which the units of the radius of curvature, the thickness, and the effective focal length are all millimeters (mm). Tables 6-1 and 6-2 show the higher order coefficients that can be used for each of the aspherical mirror surfaces in example 3, wherein each of the aspherical surface profiles can be defined by the formula (1) given in example 1 above.
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TABLE 5
Face number A4 A6 A8 A10 A12 A14 A16
S1 1.7371E+00 -2.7810E-01 8.2318E-02 -3.0644E-02 1.1136E-02 -5.1838E-03 1.7931E-03
S2 6.0764E-01 -1.8810E-01 7.6093E-03 7.9394E-03 5.6993E-03 -3.1685E-03 -1.2476E-03
S3 -2.0698E-01 -8.3920E-03 8.1006E-03 6.1858E-04 -4.7354E-04 -1.8016E-04 3.7182E-05
S4 -3.7950E-02 3.8680E-03 3.8644E-03 7.7645E-04 2.2509E-04 5.0108E-05 3.7256E-05
S5 1.0432E-02 -8.3601E-04 -3.4376E-04 -1.0505E-04 -3.6365E-05 -1.4249E-05 -5.8157E-06
S6 -4.8600E-02 -5.3779E-04 -1.2430E-03 -3.2448E-04 -1.2667E-04 -4.9238E-05 -2.0986E-05
S7 -2.5524E-01 4.9924E-03 -1.4288E-03 -7.2006E-05 8.9576E-06 9.1724E-05 -1.6717E-06
S8 -2.8876E-01 4.5578E-02 -4.8313E-03 1.1103E-03 -3.0456E-04 2.2116E-04 -4.8190E-05
S9 -4.3407E-02 1.8913E-02 -3.6326E-03 1.6365E-03 -1.7939E-03 4.2927E-04 -1.0473E-04
S10 -1.1799E-01 1.1011E-01 -1.6093E-02 8.4252E-03 -3.2848E-03 -2.0462E-04 -7.2745E-04
S11 -3.9987E+00 9.9940E-01 -2.5299E-01 6.7406E-02 -3.6449E-02 2.0341E-02 -5.6805E-03
S12 -6.7054E+00 1.4251E+00 -4.4916E-01 1.8181E-01 -8.7749E-02 3.5469E-02 -1.6302E-02
TABLE 6-1
Face number A18 A20 A22 A24 A26 A28 A30
S1 -9.4086E-04 3.8319E-04 -1.4369E-04 1.1614E-04 1.3768E-05 3.2621E-05 4.2928E-06
S2 5.7378E-04 5.2247E-04 -9.2214E-05 -1.6920E-04 -4.0749E-06 4.5866E-05 1.3587E-05
S3 2.7199E-05 -9.3792E-07 -2.4260E-06 5.9018E-07 1.1120E-06 2.7254E-07 1.8654E-06
S4 9.2834E-06 5.8641E-06 1.0780E-06 2.1693E-06 -4.8662E-07 4.9368E-07 -5.1961E-07
S5 4.0445E-07 5.4314E-08 2.1537E-07 -5.6100E-07 2.7296E-07 3.1478E-08 0.0000E+00
S6 -1.0721E-05 -1.1494E-06 -7.2459E-07 1.4420E-06 7.1201E-08 5.0123E-07 -1.4070E-07
S7 3.8286E-07 -1.4905E-05 1.1044E-06 -1.3966E-06 4.1068E-06 6.2014E-07 1.1269E-06
S8 3.4792E-05 -2.6547E-05 1.1209E-05 -1.9999E-06 6.0654E-06 -4.6060E-07 0.0000E+00
S9 8.2819E-05 -1.0374E-04 3.0231E-05 1.1914E-05 2.5849E-05 2.1006E-06 4.2911E-06
S10 3.8309E-04 1.0102E-04 5.7342E-05 -6.4241E-05 -2.4098E-05 -6.8932E-06 1.1388E-05
S11 -1.5701E-03 -9.1729E-04 1.6354E-03 3.3992E-04 -2.5138E-04 -9.7864E-05 1.1800E-04
S12 1.1586E-02 -3.8533E-03 1.0642E-03 -2.4018E-03 -9.4576E-05 -3.5013E-05 4.8663E-04
TABLE 6-2
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 image heights. 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: a first lens E1, a second lens E2, a stop STO, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter E7, and an imaging surface S15.
The first lens element E1 has negative refractive power, wherein an object-side surface S1 thereof is concave, and an image-side surface S2 thereof is concave. The second lens element E2 has positive 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 negative refractive power, wherein an object-side surface S7 thereof is concave, and an image-side surface S8 thereof is concave. The fifth lens element E5 has positive refractive power, wherein an object-side surface S9 thereof is concave and an image-side surface S10 thereof is convex. The sixth lens element E6 has negative refractive power, wherein an object-side surface S11 thereof is convex and an image-side surface S12 thereof is concave. The filter E7 has an object side surface S13 and an image side surface S14. Light from the object sequentially passes through the respective surfaces S1 to S14 and is finally imaged on the imaging surface S15.
In this example, the effective focal length f of the optical imaging lens is 2.06mm, the total length TTL of the optical imaging lens (i.e., the distance on the optical axis from the object side surface S1 of the first lens E1 to the imaging surface S15 of the optical imaging lens) is 6.13mm, half of the diagonal length ImgH of the effective pixel area on the imaging surface S15 of the optical imaging lens is 3.42mm, and half of the maximum field angle Semi-FOV of the optical imaging lens is 61.4 °.
Table 7 shows a basic parameter table of the optical imaging lens of embodiment 4, in which the units of the radius of curvature, the thickness, and the effective focal length are all millimeters (mm). Tables 8-1 and 8-2 show the higher order coefficients that can be used for each of the aspherical mirror surfaces in example 4, wherein each of the aspherical surface profiles can be defined by the formula (1) given in example 1 above.
TABLE 7
Face number A4 A6 A8 A10 A12 A14 A16
S1 1.7358E+00 -2.7843E-01 8.2277E-02 -3.0647E-02 1.1132E-02 -5.1680E-03 1.7893E-03
S2 6.0780E-01 -1.8822E-01 7.5457E-03 7.9111E-03 5.7118E-03 -3.1672E-03 -1.2224E-03
S3 -2.0697E-01 -8.3930E-03 8.1440E-03 6.0697E-04 -4.8614E-04 -1.8188E-04 3.9481E-05
S4 -3.7957E-02 3.8780E-03 3.8850E-03 7.7649E-04 2.2110E-04 4.9160E-05 3.8083E-05
S5 1.0469E-02 -8.0194E-04 -3.3923E-04 -9.7143E-05 -3.5525E-05 -1.1640E-05 -4.5192E-06
S6 -4.8592E-02 -5.4346E-04 -1.2156E-03 -3.1539E-04 -1.2248E-04 -4.8936E-05 -2.0334E-05
S7 -2.5462E-01 4.9949E-03 -1.4541E-03 -7.7706E-05 1.3033E-05 8.9464E-05 -3.7329E-06
S8 -2.8871E-01 4.5577E-02 -4.9202E-03 1.1258E-03 -3.2575E-04 2.2342E-04 -5.6751E-05
S9 -4.7945E-02 1.9232E-02 -3.6697E-03 1.7223E-03 -1.7672E-03 4.5286E-04 -1.1778E-04
S10 -1.2030E-01 1.1007E-01 -1.6200E-02 8.4474E-03 -3.2790E-03 -2.0897E-04 -7.2489E-04
S11 -3.9956E+00 1.0000E+00 -2.5380E-01 6.7041E-02 -3.6450E-02 2.0249E-02 -5.4918E-03
S12 -6.7053E+00 1.4229E+00 -4.4862E-01 1.8196E-01 -8.7582E-02 3.5464E-02 -1.6226E-02
TABLE 8-1
Face number A18 A20 A22 A24 A26 A28 A30
S1 -9.4242E-04 3.7979E-04 -1.4273E-04 1.1410E-04 1.3339E-05 3.0958E-05 4.3348E-06
S2 5.7541E-04 5.3111E-04 -9.1721E-05 -1.6899E-04 -3.9233E-06 4.8057E-05 1.4187E-05
S3 2.5460E-05 -2.5574E-06 -3.5120E-06 -1.5352E-07 7.9404E-07 -4.5456E-08 2.2555E-06
S4 8.9513E-06 6.1196E-06 1.0641E-06 1.8798E-06 -1.4230E-06 2.6683E-07 -6.1298E-07
S5 2.1023E-06 6.9833E-07 8.1118E-07 -3.4287E-07 6.9870E-07 3.4087E-07 0.0000E+00
S6 -9.7315E-06 -2.8854E-07 1.0730E-07 2.0784E-06 9.3153E-07 1.2482E-06 4.5220E-07
S7 3.3272E-07 -1.2790E-05 3.9423E-06 1.1785E-06 6.5517E-06 2.0919E-06 1.5465E-06
S8 3.7258E-05 -2.7721E-05 1.1533E-05 -3.4319E-06 6.3013E-06 -2.7784E-07 0.0000E+00
S9 9.6061E-05 -1.0811E-04 2.6894E-05 4.8819E-06 2.5712E-05 1.5671E-06 3.9265E-06
S10 3.8040E-04 9.9742E-05 5.5610E-05 -6.2715E-05 -2.3784E-05 -7.1162E-06 1.1621E-05
S11 -1.4623E-03 -9.3209E-04 1.5711E-03 2.6622E-04 -2.4449E-04 -5.8295E-05 1.6708E-04
S12 1.1542E-02 -3.8905E-03 1.0240E-03 -2.4398E-03 -9.2214E-05 -2.2841E-05 4.9901E-04
TABLE 8-2
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 image heights. 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: a first lens E1, a second lens E2, a stop STO, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter E7, and an imaging surface S15.
The first lens element E1 has negative refractive power, wherein an object-side surface S1 thereof is concave, and an image-side surface S2 thereof is concave. The second lens element E2 has positive 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 negative refractive power, wherein an object-side surface S7 thereof is convex and an image-side surface S8 thereof is concave. The fifth lens element E5 has positive refractive power, wherein an object-side surface S9 thereof is convex, and an image-side surface S10 thereof is convex. The sixth lens element E6 has negative refractive power, wherein an object-side surface S11 thereof is convex and an image-side surface S12 thereof is concave. The filter E7 has an object side surface S13 and an image side surface S14. Light from the object sequentially passes through the respective surfaces S1 to S14 and is finally imaged on the imaging surface S15.
In this example, the effective focal length f of the optical imaging lens is 2.05mm, the total length TTL of the optical imaging lens (i.e., the distance on the optical axis from the object side surface S1 of the first lens E1 to the imaging surface S15 of the optical imaging lens) is 6.05mm, half of the diagonal length ImgH of the effective pixel area on the imaging surface S15 of the optical imaging lens is 3.42mm, and half of the maximum field angle Semi-FOV of the optical imaging lens is 60.3 °.
Table 9 shows a basic parameter table of the optical imaging lens of embodiment 5, in which the units of the radius of curvature, the thickness, and the effective focal length are all millimeters (mm). Tables 10-1 and 10-2 show the higher order coefficients that can be used for each of the aspherical mirror surfaces in example 5, wherein each of the aspherical surface profiles can be defined by the formula (1) given in example 1 above.
TABLE 9
Face number A4 A6 A8 A10 A12 A14 A16
S1 1.7113E+00 -2.7225E-01 8.0769E-02 -3.0254E-02 1.0580E-02 -4.9030E-03 1.7363E-03
S2 6.0642E-01 -1.9061E-01 7.6543E-03 8.5480E-03 5.4038E-03 -3.1268E-03 -1.2563E-03
S3 -2.0765E-01 -7.2401E-03 8.4321E-03 3.3957E-04 -5.5533E-04 -1.4223E-04 6.0589E-05
S4 -3.7091E-02 4.6321E-03 3.9645E-03 6.9430E-04 1.6688E-04 3.5227E-05 2.8858E-05
S5 8.9692E-03 -3.2697E-04 -1.3413E-04 -3.2328E-05 -1.7708E-05 -7.7043E-06 -4.6349E-06
S6 -4.8235E-02 8.6616E-04 -4.2520E-04 -5.6890E-05 -4.1816E-05 -1.3670E-05 -1.2559E-05
S7 -2.4566E-01 6.5791E-03 -1.1876E-03 2.1154E-04 -9.4383E-05 1.3868E-04 -3.3990E-05
S8 -3.1752E-01 5.2354E-02 -7.2938E-03 1.9614E-03 -9.6850E-04 5.2090E-04 -2.2330E-04
S9 -1.6965E-01 3.8973E-02 -8.8802E-03 3.9972E-03 -2.7111E-03 1.0636E-03 -4.1781E-04
S10 -1.5793E-01 1.2498E-01 -1.7699E-02 1.0374E-02 -5.1936E-03 -5.3338E-04 -6.6261E-04
S11 -3.8898E+00 1.0000E+00 -2.5369E-01 6.4790E-02 -3.3430E-02 1.8834E-02 -4.6327E-03
S12 -6.5605E+00 1.4040E+00 -4.4013E-01 1.7965E-01 -8.6911E-02 3.5532E-02 -1.5731E-02
TABLE 10-1
Face number A18 A20 A22 A24 A26 A28 A30
S1 -8.6818E-04 3.6473E-04 -1.1257E-04 1.2705E-04 3.6335E-05 4.2007E-05 1.2521E-05
S2 5.3390E-04 5.0361E-04 -7.1255E-05 -1.6039E-04 -1.3348E-05 3.7874E-05 1.0884E-05
S3 2.1050E-05 -3.3673E-06 -2.6597E-06 1.2575E-06 -6.0778E-07 -1.1493E-06 9.0674E-07
S4 4.9951E-06 3.5394E-06 1.4516E-06 2.3327E-06 2.3514E-07 8.3190E-07 3.0889E-07
S5 3.2164E-07 -9.4643E-08 7.6386E-07 -1.8726E-07 1.7310E-08 -6.4113E-07 0.0000E+00
S6 -6.2854E-06 -3.2119E-06 -1.0310E-06 2.7502E-07 5.6787E-07 7.4902E-07 1.2473E-07
S7 2.1058E-05 -2.4463E-05 7.3692E-06 -8.8030E-06 3.6558E-06 -1.3388E-06 1.0973E-06
S8 1.2911E-04 -7.6730E-05 4.1142E-05 -2.4520E-05 1.3721E-05 -3.9749E-06 0.0000E+00
S9 2.5259E-04 -1.9429E-04 7.1810E-05 -3.4514E-05 3.3710E-05 -1.1032E-05 2.6230E-06
S10 7.2248E-04 5.1575E-05 -3.4448E-05 -1.3206E-04 -1.0643E-05 1.1611E-05 2.7448E-05
S11 -1.7264E-03 -6.8445E-04 1.6237E-03 2.1106E-04 -3.1241E-04 -1.0513E-04 8.1073E-05
S12 1.0796E-02 -4.1365E-03 1.1751E-03 -2.4708E-03 -6.6569E-06 8.5624E-05 5.5182E-04
TABLE 10-2
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 image heights. 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: a first lens E1, a second lens E2, a stop STO, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter E7, and an imaging surface S15.
The first lens element E1 has negative refractive power, wherein an object-side surface S1 thereof is concave, and an image-side surface S2 thereof is concave. The second lens element E2 has positive 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 negative refractive power, wherein an object-side surface S7 thereof is convex and an image-side surface S8 thereof is concave. The fifth lens element E5 has positive refractive power, wherein an object-side surface S9 thereof is convex, and an image-side surface S10 thereof is convex. The sixth lens element E6 has negative refractive power, wherein an object-side surface S11 thereof is convex and an image-side surface S12 thereof is concave. The filter E7 has an object side surface S13 and an image side surface S14. Light from the object sequentially passes through the respective surfaces S1 to S14 and is finally imaged on the imaging surface S15.
In this example, the effective focal length f of the optical imaging lens is 2.05mm, the total length TTL of the optical imaging lens (i.e., the distance on the optical axis from the object side surface S1 of the first lens E1 to the imaging surface S15 of the optical imaging lens) is 6.08mm, half of the diagonal length ImgH of the effective pixel area on the imaging surface S15 of the optical imaging lens is 3.42mm, and half of the maximum field angle Semi-FOV of the optical imaging lens is 60.0 °.
Table 11 shows a basic parameter table of the optical imaging lens of embodiment 6, in which the units of the radius of curvature, the thickness, and the effective focal length are all millimeters (mm). Tables 12-1 and 12-2 show the higher order coefficients that can be used for each of the aspherical mirror surfaces in example 6, wherein each of the aspherical surface profiles can be defined by the formula (1) given in example 1 above.
TABLE 11
Face number A4 A6 A8 A10 A12 A14 A16
S1 1.7245E+00 -2.7090E-01 8.2028E-02 -3.0627E-02 1.0700E-02 -5.0375E-03 1.8148E-03
S2 6.0955E-01 -1.9404E-01 8.7905E-03 8.9276E-03 5.4552E-03 -3.3583E-03 -1.2211E-03
S3 -2.1681E-01 -6.0806E-03 8.7906E-03 2.2079E-04 -5.9413E-04 -1.2777E-04 6.8203E-05
S4 -3.7683E-02 5.3083E-03 4.2098E-03 7.5257E-04 1.9498E-04 4.7922E-05 3.6055E-05
S5 8.8471E-03 -4.1417E-04 -1.5509E-04 -3.7653E-05 -1.8710E-05 -7.5968E-06 -4.4022E-06
S6 -4.9380E-02 7.9721E-04 -5.2345E-04 -9.3129E-05 -5.5491E-05 -1.8906E-05 -1.4128E-05
S7 -2.5643E-01 7.7333E-03 -1.0857E-03 2.3162E-04 -1.1129E-04 1.4360E-04 -3.8393E-05
S8 -3.3180E-01 5.4719E-02 -7.4818E-03 2.1323E-03 -1.0746E-03 5.6652E-04 -2.3616E-04
S9 -1.7020E-01 3.9931E-02 -8.9630E-03 4.2142E-03 -3.0847E-03 1.3082E-03 -4.7452E-04
S10 -1.4414E-01 1.3111E-01 -1.8689E-02 1.0514E-02 -6.0486E-03 -5.5026E-04 -4.3553E-04
S11 -3.8941E+00 1.0073E+00 -2.5768E-01 6.4630E-02 -3.3499E-02 1.9929E-02 -5.3629E-03
S12 -6.6635E+00 1.4354E+00 -4.5257E-01 1.8313E-01 -9.1371E-02 3.7856E-02 -1.6228E-02
TABLE 12-1
Face number A18 A20 A22 A24 A26 A28 A30
S1 -8.3179E-04 4.4700E-04 -6.3206E-05 1.7000E-04 5.2849E-05 5.2065E-05 1.4358E-05
S2 6.2233E-04 5.2245E-04 -9.9844E-05 -1.6481E-04 4.9888E-07 5.2760E-05 1.7018E-05
S3 2.1540E-05 -4.7724E-06 -2.2331E-06 8.6037E-07 -3.9898E-07 -1.3653E-06 8.6886E-07
S4 8.1847E-06 5.8626E-06 2.4239E-06 3.0893E-06 6.1307E-07 8.9830E-07 2.4399E-07
S5 1.5481E-07 -2.8656E-07 5.5478E-07 -2.3028E-07 1.3084E-07 -5.4594E-07 0.0000E+00
S6 -6.6162E-06 -2.8722E-06 -7.8257E-07 6.4747E-07 6.0947E-07 6.3530E-07 -1.1169E-07
S7 1.9650E-05 -2.5945E-05 7.2608E-06 -8.8861E-06 3.8713E-06 -1.5643E-06 1.0031E-06
S8 1.3633E-04 -8.1406E-05 4.3664E-05 -2.6412E-05 1.5094E-05 -4.7782E-06 0.0000E+00
S9 2.6109E-04 -2.2287E-04 7.9514E-05 -3.9326E-05 3.9168E-05 -1.4218E-05 5.8440E-06
S10 8.8878E-04 -5.3563E-07 -9.8580E-05 -1.7232E-04 -4.3524E-06 2.2016E-05 3.8124E-05
S11 -2.0300E-03 -5.1438E-04 1.7416E-03 2.3933E-04 -3.4511E-04 -7.2320E-05 1.1911E-04
S12 1.1735E-02 -4.6960E-03 1.0101E-03 -2.5959E-03 6.7901E-05 5.2425E-05 5.9922E-04
TABLE 12-2
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 image heights. 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.
In summary, examples 1 to 6 satisfy the relationships shown in table 13, respectively.
TABLE 13
The application also provides an imaging device, wherein the electronic photosensitive element can be a photosensitive coupling element (CCD) or a complementary metal oxide semiconductor element (CMOS). The imaging device may be a stand alone imaging device such as a digital camera or an imaging module integrated on a mobile electronic device such as a cell phone. The imaging device is equipped with the optical imaging lens described above.
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 (11)

1. The optical imaging lens is characterized by comprising, in order from an object side to an image side along an optical axis:
a first lens having negative optical power;
a second lens having positive optical power;
a third lens having positive optical power;
a fourth lens having negative optical power;
a fifth lens having positive optical power; and
a sixth lens having optical power; wherein,
the number of lenses with focal power in the optical imaging lens is six;
the maximum field angle FOV of the optical imaging lens satisfies: FOV is more than or equal to 120 degrees;
the radius of curvature R10 of the image side of the fifth lens, the radius of curvature R11 of the object side of the sixth lens, the radius of curvature R12 of the image side of the sixth lens and the effective focal length f of the optical imaging lens satisfy: -f/(R10+R11+R12) < -2.0;
an on-axis distance TD from an object side surface of the first lens element to an image side surface of the sixth lens element, a center thickness CT4 of the fourth lens element on the optical axis, and a center thickness CT5 of the fifth lens element on the optical axis satisfy: 4.5< TD/(CT4+CT5) < 5.2;
the effective focal length f2 of the second lens element, the effective focal length f5 of the fifth lens element, the radius of curvature R4 of the image-side surface of the second lens element, the radius of curvature R5 of the object-side surface of the third lens element and the radius of curvature R6 of the image-side surface of the third lens element satisfy the following conditions: 6.7mm 2 <f2×R4-f5×(R5-R6)<8.8mm 2 。
2. The optical imaging lens according to claim 1, wherein a radius of curvature R2 of an image side surface of the first lens, a radius of curvature R3 of an object side surface of the second lens, and an air interval T12 of the first lens and the second lens on the optical axis satisfy: 3.0 < (R2-T12)/(R3-T12) < 4.0.
3. The optical imaging lens according to claim 1 or 2, wherein an effective focal length f4 of the fourth lens and an air interval T45 of the fourth lens and the fifth lens on the optical axis satisfy: -32.0 < f4/T45 < -20.0.
4. The optical imaging lens according to claim 1 or 2, wherein an effective focal length f5 of the fifth lens and an air interval T56 of the fifth lens and the sixth lens on the optical axis satisfy: f5/T56 is less than 8.1 and more than 5.8.
5. The optical imaging lens according to claim 1 or 2, wherein a radius of curvature R8 of an image side surface of the fourth lens and an air interval T34 of the third lens and the fourth lens on the optical axis satisfy: R8/T34 is more than 6.7 and less than 10.1.
6. The optical imaging lens according to claim 1 or 2, wherein a radius of curvature R2 of an image side surface of the first lens and an air interval T12 of the first lens and the second lens on the optical axis satisfy: R2/T12 is more than 7.0 and less than 9.5.
7. The optical imaging lens according to claim 1, wherein a radius of curvature R1 of an object side surface of the first lens and a center thickness CT1 of the first lens on the optical axis satisfy: -9.0 < R1/CT1 < -6.0.
8. The optical imaging lens according to claim 1 or 7, wherein a radius of curvature R1 of an object side surface of the first lens and a center thickness CT2 of the second lens on the optical axis satisfy: -9.5 < R1/CT 2< -8.5.
9. The optical imaging lens according to claim 1 or 7, wherein a radius of curvature R5 of an object side surface of the third lens and a radius of curvature R11 of an object side surface of the sixth lens satisfy: R5/R11 is more than 2.0 and less than 2.6.
10. The optical imaging lens according to claim 1 or 7, wherein a curvature radius R10 of an image side surface of the fifth lens and a center thickness CT5 of the fifth lens on the optical axis satisfy: -3.8 < R10/CT 5< -2.5.
11. The optical imaging lens according to claim 1 or 7, wherein a radius of curvature R1 of an object side surface of the first lens and an air interval T12 of the first lens and the second lens on the optical axis satisfy: -4.5< R1/T12< -4.0.
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CN210136355U (en) * 2019-07-15 2020-03-10 浙江舜宇光学有限公司 Optical imaging lens
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CN113484993A (en) * 2021-07-28 2021-10-08 浙江舜宇光学有限公司 Optical imaging lens

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105717611A (en) * 2014-12-19 2016-06-29 三星电机株式会社 Lens module
CN209132499U (en) * 2018-11-21 2019-07-19 浙江舜宇光学有限公司 Pick-up lens group
CN113376808A (en) * 2018-11-21 2021-09-10 浙江舜宇光学有限公司 Image pickup lens assembly
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