CN114415337A - Optical imaging lens - Google Patents

Optical imaging lens Download PDF

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Publication number
CN114415337A
CN114415337A CN202210102005.XA CN202210102005A CN114415337A CN 114415337 A CN114415337 A CN 114415337A CN 202210102005 A CN202210102005 A CN 202210102005A CN 114415337 A CN114415337 A CN 114415337A
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lens
optical imaging
optical axis
image
imaging lens
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CN202210102005.XA
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CN114415337B (en
Inventor
王焕
胡亚斌
闻人建科
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
    • 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 comprises a first lens, a second lens, a third lens, a fourth lens and a fifth lens, wherein the first lens to the fifth lens are sequentially arranged from an object side to an image side along an optical axis, and the image side surface of the first lens is a concave surface; the object side surface of the second lens is a concave surface, and the image side surface of the second lens is a convex surface; the third lens has a negative optical power; the object side surface of the fourth lens is a convex surface; the object side surface of the fifth lens is a convex surface, and the image side surface of the fifth lens is a concave surface; the distance TTL from the object side surface of the first lens to the imaging surface of the optical imaging lens on the optical axis and the half ImgH of the diagonal length of the effective pixel area on the imaging surface satisfy that: TTL/ImgH < 1.5; and a distance T12 on the optical axis from the image-side surface of the first lens to the object-side surface of the second lens and a distance T34 on the optical axis from the image-side surface of the third lens to the object-side surface of the fourth lens satisfy: T12/T34> 1.57.

Description

Optical imaging lens
Technical Field
The application relates to the field of optical elements, in particular to an optical imaging lens.
Background
In modern social activities, mobile phones have become indispensable articles in people's lives, and meanwhile, the camera function of the mobile phones also attracts more and more attention of consumers. In terms of the selection of mobile phone users on the market at present, the primary position is still the photographic index: light and thin practical camera phones have become the first choice for consumers. The molding process of the existing lens constrains the optimization capability of an optical system, when the camera is pursued to be ultra-thin, the imaging effects of short focus, wide angle and the like can be difficult to achieve, and the miniaturized optical imaging lens still has some technical defects to be improved.
Disclosure of Invention
The application provides an optical imaging lens, which sequentially comprises a first lens, a second lens, a third lens, a fourth lens and a fifth lens from an object side to an image side along an optical axis, wherein the image side surface of the first lens is a concave surface; the object side surface of the second lens is a concave surface, and the image side surface of the second lens is a convex surface; the third lens has negative focal power; the object side surface of the fourth lens is a convex surface; the object side surface of the fifth lens is a convex surface, and the image side surface of the fifth lens is a concave surface; the distance TTL from the object side surface of the first lens to the imaging surface of the optical imaging lens on the optical axis and the half ImgH of the diagonal length of the effective pixel area on the imaging surface satisfy that: TTL/ImgH < 1.5; and the distance T12 between the image-side surface of the first lens and the object-side surface of the second lens on the optical axis and the distance T34 between the image-side surface of the third lens and the object-side surface of the fourth lens on the optical axis satisfy: T12/T34> 1.57.
In one embodiment, an air space is formed between any two adjacent first to fifth lenses, and the first to fifth lenses are made of plastic material.
In one embodiment, the effective focal length f of the optical imaging lens, the radius of curvature R7 of the object-side surface of the fourth lens and the radius of curvature R10 of the image-side surface of the fifth lens satisfy: 0.2< (R7+ R10)/f < 1.8.
In one embodiment, the radius of curvature R3 of the object-side surface of the second lens, the radius of curvature R4 of the image-side surface of the second lens, and the effective focal length f2 of the second lens satisfy: 0.5< | f2/(R3+ R4) | < 2.6.
In one embodiment, a distance T45 on the optical axis from the image-side surface of the fourth lens to the object-side surface of the fifth lens, and a distance SAG51 on the optical axis from the intersection of the object-side surface of the fifth lens and the optical axis to the vertex of the effective radius of the object-side surface of the fifth lens satisfy: -2.5< SAG51/T45 ≦ -1.18.
In one embodiment, the central thickness CT1 of the first lens on the optical axis, the central thickness CT2 of the second lens on the optical axis, the central thickness CT3 of the third lens on the optical axis, and the central thickness CT4 of the fourth lens on the optical axis satisfy: 0.5< CT1/(CT2+ CT3+ CT4) < 1.5.
In one embodiment, a distance T12 on the optical axis from the image-side surface of the first lens to the object-side surface of the second lens and a distance T45 on the optical axis from the image-side surface of the fourth lens to the object-side surface of the fifth lens satisfy: 0< T45/T12< 2.44.
In one embodiment, a distance T12 on the optical axis from the image-side surface of the first lens to the object-side surface of the second lens, and a distance SAG21 on the optical axis from the intersection of the object-side surface of the second lens and the optical axis to the vertex of the effective radius of the object-side surface of the second lens satisfy: -1< SAG21/T12 ≦ 0.42.
In one embodiment, the effective half aperture DT12 of the image-side surface of the first lens and the effective half aperture DT21 of the object-side surface of the second lens satisfy: 0.7< DT21/DT12< 1.5.
In one embodiment, the central thickness CT4 of the fourth lens on the optical axis and the edge thickness ET4 of the fourth lens satisfy: 0.2< ET4/CT4< 1.
In one embodiment, the central thickness CT5 of the fifth lens on the optical axis and the edge thickness ET5 of the fifth lens satisfy: ET5/CT5 is more than or equal to 0.75.
In one embodiment, the Semi-FOV of the maximum field angle of the optical imaging lens and the effective focal length f of the optical imaging lens satisfy: 0.5mm < f tan (Semi-FOV/2) <1.5 mm.
In one embodiment, the effective focal length f of the optical imaging lens, the effective focal length f1 of the first lens and the effective focal length f4 of the fourth lens satisfy: 1.2< (f1+ f4)/f < 2.1.
In one embodiment, a sum Σ AT of air intervals on an optical axis between any adjacent two lenses of the first lens to the fifth lens and a distance TTL on the optical axis from an object side surface of the first lens to an image forming surface satisfy: 0< ∑ AT/TTL < 0.5.
In one embodiment, a distance T34 on the optical axis from the image-side surface of the third lens to the object-side surface of the fourth lens, and a distance SAG41 on the optical axis from the intersection point of the object-side surface of the fourth lens and the optical axis to the effective radius vertex of the object-side surface of the fourth lens satisfy: -2.6< SAG41/T34< 0.
The present application further provides an optical imaging lens including a first lens element, a second lens element, a third lens element, a fourth lens element, and a fifth lens element, wherein the first lens element to the fifth lens element are sequentially disposed along an optical axis from an object side to an image side, and an image side surface of the first lens element is a concave surface; the object side surface of the second lens is a concave surface, and the image side surface of the second lens is a convex surface; the third lens has negative focal power; the object side surface of the fourth lens is a convex surface; the object side surface of the fifth lens is a convex surface, and the image side surface of the fifth lens is a concave surface; the distance TTL from the object side surface of the first lens to the imaging surface of the optical imaging lens on the optical axis and the half ImgH of the diagonal length of the effective pixel area on the imaging surface satisfy that: TTL/ImgH < 1.5; and a center thickness CT1 of the first lens on the optical axis, a center thickness CT2 of the second lens on the optical axis, a center thickness CT3 of the third lens on the optical axis, and a center thickness CT4 of the fourth lens on the optical axis satisfy: 0.5< CT1/(CT2+ CT3+ CT4) < 1.5.
This application adopts five lens, through the focal power of rational distribution each lens, face type, each lens's central thickness and each lens between the epaxial interval etc. for above-mentioned optical imaging lens has at least one beneficial effect such as big image plane, high resolution, miniaturization, high imaging quality.
Drawings
Other features, objects and advantages of the present application will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, made with reference to the accompanying drawings in which:
fig. 1 shows a schematic structural view 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 astigmatic curve, a distortion curve, and a chromatic aberration of magnification curve, respectively, of the optical imaging lens of embodiment 1;
fig. 3 is a schematic structural view showing an optical imaging lens according to embodiment 2 of the present application;
fig. 4A to 4D show an on-axis chromatic aberration curve, an astigmatic curve, a distortion curve, and a chromatic aberration of magnification curve, respectively, of the optical imaging lens of embodiment 2;
fig. 5 is a schematic structural view showing an optical imaging lens according to embodiment 3 of the present application;
fig. 6A to 6D show an on-axis chromatic aberration curve, an astigmatic curve, a distortion curve, and a chromatic aberration of magnification curve, respectively, of the optical imaging lens of embodiment 3;
fig. 7 is a schematic structural view showing 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 chromatic aberration of magnification curve, respectively, of the optical imaging lens of embodiment 4;
fig. 9 is a schematic structural view showing an optical imaging lens according to embodiment 5 of the present application; and
fig. 10A to 10D show an axial chromatic aberration curve, an astigmatism curve, a distortion curve, and a chromatic aberration of magnification curve, respectively, of the optical imaging lens of embodiment 5.
Detailed Description
For a better understanding of the present application, various aspects of the present 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 present application and does not limit the scope of the present 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 this specification, the expressions first, second, third, etc. are used only to distinguish one feature from another, and do not represent any limitation on the features. Thus, the first lens discussed below may also be referred to as the second lens or the third lens without departing from the teachings of the present application.
In the drawings, the thickness, size, and shape of the lens have been slightly exaggerated for convenience of explanation. In particular, the shapes of the spherical or aspherical surfaces shown in the drawings are shown by way of example. That is, the shape of the spherical surface or the aspherical surface is not limited to the shape of the spherical surface or the aspherical surface shown in the drawings. The figures are purely diagrammatic and 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, it means that 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 called the object side surface of the lens, and the surface of each lens closest to the imaging surface is called the image side surface of the lens.
It will be further understood that the terms "comprises," "comprising," "has," "having," "includes" 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. Moreover, when a statement such as "at least one of" appears after a list of listed features, the entirety of the listed features is modified rather than modifying individual elements in the list. Furthermore, when describing embodiments of the present application, the use of "may" mean "one or more embodiments of the present 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 the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
The features, principles, and other aspects of the present application are described in detail below.
An optical imaging lens according to an exemplary embodiment of the present application may include five lenses having optical powers, which are a first lens, a second lens, a third lens, a fourth lens, and a fifth lens, respectively. The five lenses are arranged along the optical axis in sequence from the object side to the image side. Any adjacent two lenses of the first lens to the fifth lens can have a spacing distance therebetween.
In an exemplary embodiment, the first lens may have a positive or negative power, with the image-side surface being concave; the second lens can have positive focal power or negative focal power, the object side surface of the second lens is a concave surface, and the image side surface of the second lens is a convex surface; the third lens may have a negative optical power; the fourth lens can have positive focal power or negative focal power, and the object side surface of the fourth lens is a convex surface; and the fifth lens can have positive focal power or negative focal power, and the object side surface of the fifth lens is a convex surface, and the image side surface of the fifth lens is a concave surface. The surface type arrangement 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 reduced and is not too large, and is vital to improving the aberration correction capability of the optical imaging lens and reducing the sensitivity of the optical imaging lens.
An air space is arranged between any two adjacent lenses of the first lens to the fifth lens, and the first lens to the fifth lens are made of plastic materials.
The distance TTL from the object side surface of the first lens to the imaging surface of the optical imaging lens on the optical axis and the half ImgH of the diagonal length of the effective pixel area on the imaging surface satisfy that: TTL/ImgH is less than 1.5, which is beneficial to reducing the total size of the optical imaging lens, ensuring a larger field angle and realizing the ultrathin characteristic and miniaturization of the optical imaging lens.
The distance T12 between the image-side surface of the first lens element and the object-side surface of the second lens element on the optical axis and the distance T34 between the image-side surface of the third lens element and the object-side surface of the fourth lens element on the optical axis satisfy: T12/T34> 1.57. More specifically, T12 and T34 further satisfy T12/T34> 2.2. The optical imaging lens meets the requirements of T12/T34>1.57, is favorable for realizing reasonable distribution of space occupied by each lens of the optical imaging lens, and meets the head size structure requirement of a small head.
The half ImgH of the diagonal length of the effective pixel area on the imaging surface of the optical imaging lens meets the following conditions: ImgH >2.67 mm.
In an exemplary embodiment, an optical imaging lens according to the present application further includes a stop disposed between the object side and the first lens.
In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 0.2< (R7+ R10)/f <1.8, wherein f is an effective focal length of the optical imaging lens, R7 is a radius of curvature of an object-side surface of the fourth lens, and R10 is a radius of curvature of an image-side surface of the fifth lens. More specifically, R7, R10 and f further satisfy 0.7< (R7+ R10)/f < 1.1. The spherical aberration correction lens meets the requirement that 0.2< (R7+ R10)/f <1.8, is favorable for effectively correcting the spherical aberration brought to the optical imaging lens by the fourth lens and the fifth lens, is also favorable for reducing the light height of an edge field of view, and reduces the risk of tail stray light.
In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 0.5< | f2/(R3+ R4) | <2.6, wherein R3 is a radius of curvature of an object-side surface of the second lens, R4 is a radius of curvature of an image-side surface of the second lens, and f2 is an effective focal length of the second lens. More specifically, f2, R3 and R4 further satisfy 1< | f2/(R3+ R4) | < 2.1. Satisfy 0.5< | f2/(R3+ R4) | <2.6, be favorable to satisfying the structural requirement of optical imaging lens, promote the performance of optical imaging lens, still be favorable to effectively reducing the chromatic aberration that the second lens brought.
In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: -2.5< SAG51/T45 ≦ -1.18, where T45 is the distance on the optical axis from the image-side surface of the fourth lens to the object-side surface of the fifth lens, and SAG51 is the distance on the optical axis from the intersection of the object-side surface of the fifth lens and the optical axis to the vertex of the effective radius of the object-side surface of the fifth lens. More specifically, SAG51 and T45 further satisfied-1.8 < SAG51/T45 ≦ -1.18. The optical imaging lens meets the structural size requirement of an optical imaging lens, and is favorable for effectively avoiding four times of reflection ghost images generated between the fourth lens and the fifth lens, wherein-2.5 < SAG51/T45 is less than or equal to-1.18.
In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 0.5< CT1/(CT2+ CT3+ CT4) <1.5, where CT1 is the central thickness of the first lens on the optical axis, CT2 is the central thickness of the second lens on the optical axis, CT3 is the central thickness of the third lens on the optical axis, and CT4 is the central thickness of the fourth lens on the optical axis. More specifically, CT1, CT2, CT3 and CT4 further satisfy 0.9< CT1/(CT2+ CT3+ CT4) < 1.2. The optical imaging lens meets 0.5< CT1/(CT2+ CT3+ CT4) <1.5, is favorable for reducing the coma aberration of the optical imaging lens, and is favorable for realizing reasonable distribution of the sizes of the lenses under the condition of meeting the requirement of ultrathin structural size.
In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 0< T45/T12<2.44, where T12 is the distance on the optical axis from the image-side surface of the first lens element to the object-side surface of the second lens element, and T45 is the distance on the optical axis from the image-side surface of the fourth lens element to the object-side surface of the fifth lens element. More specifically, T45 and T12 may further satisfy 1< T45/T12< 1.6. The optical imaging lens meets the requirement that 0< T45/T12<2.44, is favorable for realizing uniform distribution of air gaps among the lenses, avoids the problem of deformation interference after the lenses are assembled, and improves the space utilization rate of the optical imaging lens.
In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: -1< SAG21/T12 ≦ -0.42, wherein T12 is the distance on the optical axis from the image-side surface of the first lens to the object-side surface of the second lens, and SAG21 is the distance on the optical axis from the intersection of the object-side surface of the second lens and the optical axis to the vertex of the effective radius of the object-side surface of the second lens. More specifically, SAG21 and T12 further satisfy-0.7 < SAG21/T12 ≦ -0.42. Satisfies-1 < SAG21/T12 is less than or equal to-0.42, is beneficial to controlling the surface form and the focal power of the lens, reducing the forming risk of the lens, improving the sensitivity of the lens and reducing the assembly difficulty.
In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 0.7< DT21/DT12<1.5, where DT12 is the effective half aperture of the image side surface of the first lens and DT21 is the effective half aperture of the object side surface of the second lens. More specifically, DT21 and DT12 further satisfy 1.0< DT21/DT12< 1.1. The optical imaging lens meets the requirement that 0.7< DT21/DT12<1.5, is beneficial to realizing the small head of the optical imaging lens, and is also beneficial to reducing partial aberration of the optical imaging lens and improving the resolution of the optical imaging lens.
In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 0.2< ET4/CT4<1, wherein CT4 is the central thickness of the fourth lens on the optical axis and ET4 is the edge thickness of the fourth lens. More specifically, ET4 and CT4 further satisfy 0.4< ET4/CT4< 0.9. The optical imaging lens meets the requirement that 0.2< ET4/CT4<1, is favorable for effectively reducing the distortion and vertical axis chromatic aberration of the optical imaging lens, and reduces the molding risk of the lens.
In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: ET5/CT5 is more than or equal to 0.75, wherein CT5 is the central thickness of the fifth lens on the optical axis, and ET5 is the edge thickness of the fifth lens. The requirements that ET5/CT5 is more than or equal to 0.75 are met, the forming risk of the fifth lens is favorably reduced, the yield of the fifth lens is improved, the economic benefit is improved, the veiling glare risk brought by the fifth lens is favorably avoided in advance, and the actual economic loss is reduced.
In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 0.5mm < f tan (Semi-FOV/2) <1.5mm, wherein Semi-FOV is half of the maximum field angle of the optical imaging lens and f is the effective focal length of the optical imaging lens. More specifically, the Semi-FOV and f may further satisfy 0.9mm < f tan (Semi-FOV/2) <1.2 mm. The optical imaging lens meets the requirement that the thickness of the optical imaging lens is 0.5mm < f tan (Semi-FOV/2) <1.5mm, is favorable for enabling the optical imaging lens to obtain the effects of a large image plane and a large field angle, improves the environmental adaptability of the optical imaging lens, and accordingly can properly reduce the requirement on the stability of a carrying system.
In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 1.2< (f1+ f4)/f <2.1, wherein f is an effective focal length of the optical imaging lens, f1 is an effective focal length of the first lens, and f4 is an effective focal length of the fourth lens. More specifically, f1, f4 and f further satisfy 1.6< (f1+ f4)/f < 1.8. Satisfies 1.2< (f1+ f4)/f <2.1, is beneficial to realizing reasonable distribution of focal power, improves chromatic aberration and off-axis aberration of the optical imaging lens, and improves the performance of the optical imaging lens.
In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 0< ∑ AT/TTL <0.5, where Σ AT is the sum of air spaces on the optical axis between any adjacent two lenses of the first lens to the fifth lens, and TTL is the distance on the optical axis from the object side surface of the first lens to the image plane. More specifically, Σ AT and TTL can further satisfy 0.1< ∑ AT/TTL < 0.3. The requirement that 0< ∑ AT/TTL is less than 0.5 is met, the space utilization rate of the optical imaging lens is improved, the forming risk of the lens is reduced, and the economic benefit is improved.
In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: -2.6< SAG41/T34<0, wherein T34 is a distance on the optical axis from the image-side surface of the third lens to the object-side surface of the fourth lens, and SAG41 is a distance on the optical axis 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. More specifically, SAG41 and T34 further satisfy-1.3 < SAG41/T34< -0.5. The requirement of-2.6 < SAG41/T34<0 is met, the production quantity rate of the fourth lens is favorably improved, the forming risk is reduced, and the space utilization rate between the third lens and the fourth lens is favorably improved.
In an exemplary embodiment, the effective focal length f of the optical imaging lens may be, for example, in the range of 2.82mm to 2.92mm, the effective focal length f1 of the first lens may be, for example, in the range of 2.49mm to 3.01mm, the effective focal length f2 of the second lens may be, for example, in the range of-11.99 mm to 24.15mm, the effective focal length f3 of the third lens may be, for example, in the range of-6.77 mm to-2.72 mm, the effective focal length f4 of the fourth lens may be, for example, in the range of 1.69mm to 2.56mm, and the effective focal length f5 of the fifth lens may be, for example, in the range of-3.22 mm to-1.72 mm. Half of the Semi-FOV of the maximum field angle of the optical imaging lens may satisfy: Semi-FOV > 36.2. 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 can satisfy 3.34mm < TTL <3.51 mm. The aperture value Fno of the optical imaging lens may satisfy 2.46< Fno < 2.52.
In an exemplary embodiment, an 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 application provides an optical imaging lens with continuously variable focal power. The optical imaging lens according to the above-described embodiment of the present application may employ a plurality of lenses, for example, the above five lenses. By reasonably distributing the focal power, the surface type, the central thickness of each lens, the on-axis distance between each lens and the like, the low-order aberration of the optical imaging lens can be effectively balanced and controlled, meanwhile, the tolerance sensitivity can be reduced, and the miniaturization of the optical imaging lens can be kept.
In the embodiment of the present application, at least one of the mirror surfaces of each of the first to fifth lenses is an aspherical mirror surface. The aspheric 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 better curvature radius characteristics, and has advantages of improving distortion aberration and improving astigmatic aberration. After the aspheric lens is adopted, the aberration generated in imaging can be eliminated as much as possible, and the imaging quality is further improved. Optionally, the object-side surface and the image-side surface of each of the first lens to the fifth lens are aspheric mirror surfaces.
However, it will be appreciated by those skilled in the art that the number of lenses constituting an optical imaging lens may be varied to achieve the various results and advantages described in the present specification without departing from the claimed subject matter. For example, although five lenses are exemplified 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 an optical imaging lens applicable to the above-described embodiments are further described below with reference to the 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 structural diagram of an optical imaging lens according to embodiment 1 of the present application.
As shown in fig. 1, the optical imaging lens includes, in order from an object side to an image side: a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a filter E6, and an image forming surface S13.
The first lens element E1 has positive power, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens element E2 has negative power, and has a concave object-side surface S3 and a convex image-side surface S4. The third lens element E3 has negative power, and has a convex object-side surface S5 and a concave image-side surface S6. The fourth lens element E4 has positive power, and has a convex object-side surface S7 and a convex image-side surface S8. The fifth lens element E5 has negative power, and has a convex object-side surface S9 and a concave image-side surface S10. Filter E6 has an object side S11 and an image side S12. The light from the object sequentially passes through the respective surfaces S1 to S12 and is finally imaged on the imaging surface S13.
In this example, the effective focal length f of the optical imaging lens is 2.83mm, the effective focal length f1 of the first lens of the optical imaging lens is 3.00mm, the effective focal length f2 of the second lens is-11.98 mm, the effective focal length f3 of the third lens is-6.76 mm, the effective focal length f4 of the fourth lens is 1.70mm, the effective focal length f5 of the fifth lens is-1.73 mm, 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 S13 of the optical imaging lens) is 3.50mm, half ImgH of the diagonal line length of the effective pixel area on the imaging surface S15 of the optical imaging lens is 2.70mm, half of the semifov of the maximum field angle of view of the optical imaging lens is 42.87 °, and the aperture value f of the optical imaging lens is 2.51.
Table 1 shows a basic parameter table of the optical imaging lens of embodiment 1, in which the unit of the radius of curvature and the thickness are both millimeters (mm).
Figure BDA0003492750300000081
TABLE 1
In embodiment 1, the object-side surface and the image-side surface of any one of the first lens E1 to the fifth lens E5 are aspheric surfaces, and the surface shape x of each aspheric lens can be defined by, but is not limited to, the following aspheric surface formula:
Figure BDA0003492750300000082
wherein x is the rise of the distance from the aspheric surface vertex to the aspheric surface vertex when the aspheric surface is at the position with the height of h along the optical axis direction; c is the paraxial curvature of the aspheric surface, c being 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 i-th order of the aspherical surface. The high-order term coefficients A usable for the aspherical mirror surfaces S1 to S12 in example 1 are shown in Table 2-1 and Table 2-2 below4、A6、A8、A10、A12、A14、A16、A18、A20、A22、A24、A26、A28And A30。
Figure BDA0003492750300000083
Figure BDA0003492750300000091
TABLE 2-1
Flour mark A18 A20 A22 A24 A26 A28 A30
S1 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S2 5.7172E-06 5.9254E-06 1.0211E-05 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S3 -1.3554E-05 2.1922E-05 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S4 1.8776E-05 -4.8191E-05 1.6690E-05 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S5 1.4558E-04 -5.8980E-05 4.5044E-05 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S6 -4.3412E-05 -7.8934E-05 4.0454E-05 -1.7006E-05 -1.4991E-05 4.1504E-06 3.2197E-06
S7 9.2703E-04 2.1577E-04 -1.6727E-04 -1.9050E-05 -3.7498E-05 0.0000E+00 0.0000E+00
S8 -1.8730E-03 2.5767E-03 -2.9044E-04 3.8536E-05 3.6757E-05 -1.3794E-04 -6.3691E-05
S9 3.5129E-03 -2.6163E-03 1.5151E-03 2.6135E-04 -6.1665E-04 4.6790E-04 -2.2723E-04
S10 4.3447E-03 -1.0824E-03 1.5740E-03 2.8030E-04 1.2187E-04 -1.6905E-04 -8.0088E-05
Tables 2 to 2
Fig. 2A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 1, which represents the deviation of the convergent focal points of light rays of different wavelengths after passing through the lens. Fig. 2B shows an astigmatism curve representing a meridional field curvature and a sagittal field curvature of the optical imaging lens of embodiment 1. 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 chromatic aberration of magnification curve of the optical imaging lens of embodiment 1, which represents a 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 according to 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 parts similar to those of embodiment 1 will be omitted for the sake of brevity. Fig. 3 shows a schematic structural diagram of an optical imaging lens according to embodiment 2 of the present application.
As shown in fig. 3, the optical imaging lens includes, in order from an object side to an image side: a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a filter E6, and an image forming surface S13.
The first lens element E1 has positive power, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens element E2 has positive power, and has a concave object-side surface S3 and a convex image-side surface S4. The third lens element E3 has negative power, and has a concave object-side surface S5 and a concave image-side surface S6. The fourth lens element E4 has positive power, and has a convex object-side surface S7 and a concave image-side surface S8. The fifth lens element E5 has negative power, and has a convex object-side surface S9 and a concave image-side surface S10. Filter E6 has an object side S11 and an image side S12. The light from the object sequentially passes through the respective surfaces S1 to S12 and is finally imaged on the imaging surface S13.
In this example, the effective focal length f of the optical imaging lens is 2.90mm, the effective focal length f1 of the first lens of the optical imaging lens is 2.63mm, the effective focal length f2 of the second lens is 24.12mm, the effective focal length f3 of the third lens is-2.73 mm, the effective focal length f4 of the fourth lens is 2.12mm, the effective focal length f5 of the fifth lens is-2.47 mm, 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 S13 of the optical imaging lens) is 3.36mm, the half ImgH of the diagonal line length of the effective pixel area on the imaging surface S15 of the optical imaging lens is 2.68mm, the half semifov of the maximum field angle of view of the optical imaging lens is 38.16 °, and the aperture value f of the optical imaging lens is 2.47 no.
Table 3 shows a basic parameter table of the optical imaging lens of embodiment 2, in which the unit of the radius of curvature and the thickness are both millimeters (mm). Tables 4-1 and 4-2 show the high-order term coefficients that can be used for each aspherical mirror surface in example 2, wherein each aspherical mirror surface type can be defined by the formula (1) given in example 1 above.
Figure BDA0003492750300000101
TABLE 3
Flour mark A4 A6 A8 A10 A12 A14 A16
S1 -4.7192E-03 -2.7429E-04 -4.5021E-05 5.2593E-06 -1.2664E-05 4.8061E-06 6.0113E-06
S2 -5.2599E-02 -4.4122E-03 1.2546E-04 -7.2664E-05 3.4089E-05 -3.8790E-05 2.5065E-05
S3 -7.3585E-02 2.0336E-03 1.4259E-03 -1.9306E-04 -4.5868E-05 -4.0473E-06 -3.1846E-05
S4 1.2881E-02 5.3681E-03 4.3505E-03 -9.3595E-04 7.8846E-05 1.6540E-05 -2.5206E-05
S5 1.1843E-01 -1.7000E-02 1.2373E-03 -1.8198E-03 -1.8719E-04 3.0615E-04 -2.0468E-04
S6 -1.6425E-01 4.2689E-02 -1.7452E-02 3.2373E-03 -2.6656E-03 1.2221E-03 -7.7153E-04
S7 -9.9627E-01 6.0264E-03 -4.8688E-02 1.1801E-02 -2.7611E-03 -4.3247E-04 -2.1641E-03
S8 -2.6112E-01 6.8579E-02 -7.3888E-02 3.0436E-02 -1.0985E-02 1.5750E-03 1.7730E-03
S9 -8.6828E-01 4.2268E-01 -2.3094E-01 1.0362E-01 -3.3038E-02 1.0251E-02 -6.2963E-03
S10 -2.0212E+00 3.6477E-01 -1.4891E-01 7.4398E-02 -3.6768E-02 1.6417E-02 -7.1483E-03
TABLE 4-1
Figure BDA0003492750300000102
Figure BDA0003492750300000111
TABLE 4-2
Fig. 4A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 2, which represents the deviation of the convergent focal points of light rays of different wavelengths after passing through the lens. Fig. 4B shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the optical imaging lens of embodiment 2. 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 chromatic aberration of magnification 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 according to 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 structural diagram of an optical imaging lens according to embodiment 3 of the present application.
As shown in fig. 5, the optical imaging lens includes, in order from an object side to an image side: a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a filter E6, and an image forming surface S13.
The first lens element E1 has positive power, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens element E2 has positive power, and has a concave object-side surface S3 and a convex image-side surface S4. The third lens element E3 has negative power, and has a concave object-side surface S5 and a concave image-side surface S6. The fourth lens element E4 has positive power, and has a convex object-side surface S7 and a convex image-side surface S8. The fifth lens element E5 has negative power, and has a convex object-side surface S9 and a concave image-side surface S10. Filter E6 has an object side S11 and an image side S12. The light from the object sequentially passes through the respective surfaces S1 to S12 and is finally imaged on the imaging surface S13.
In this example, the effective focal length f of the optical imaging lens is 2.90mm, the effective focal length f1 of the first lens of the optical imaging lens is 2.65mm, the effective focal length f2 of the second lens is 24.14mm, the effective focal length f3 of the third lens is-2.73 mm, the effective focal length f4 of the fourth lens is 2.07mm, the effective focal length f5 of the fifth lens is-2.43 mm, 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 S13 of the optical imaging lens) is 3.36mm, the half ImgH of the diagonal line length of the effective pixel area on the imaging surface S15 of the optical imaging lens is 2.68mm, the half semifov of the maximum field angle of view of the optical imaging lens is 37.85 °, and the aperture value f of the optical imaging lens is 2.47.
Table 5 shows a basic parameter table of the optical imaging lens of embodiment 3, in which the unit of the radius of curvature and the thickness are both millimeters (mm). Tables 6-1 and 6-2 show the high-order term coefficients that can be used for each aspherical mirror surface in example 3, wherein each aspherical mirror surface type can be defined by the formula (1) given in example 1 above.
Figure BDA0003492750300000112
Figure BDA0003492750300000121
TABLE 5
Flour mark A4 A6 A8 A10 A12 A14 A16
S1 -4.7192E-03 -2.7429E-04 -4.5015E-05 5.2593E-06 -1.2664E-05 4.8061E-06 6.0158E-06
S2 -5.3396E-02 -4.0373E-03 -2.0854E-05 -1.1473E-05 -6.3995E-06 -1.4536E-05 9.2025E-06
S3 -7.3585E-02 2.0336E-03 1.4259E-03 -1.9306E-04 -4.5868E-05 -4.0473E-06 -3.1846E-05
S4 1.0606E-02 5.2130E-03 4.5451E-03 -1.0419E-03 8.7193E-05 -1.0126E-06 -1.3647E-05
S5 1.1474E-01 -1.5554E-02 1.5563E-03 -2.2823E-03 1.4615E-04 5.3869E-04 -1.1554E-05
S6 -1.9109E-01 4.5545E-02 -1.6989E-02 1.4757E-03 -3.5663E-03 7.4873E-04 -9.1247E-04
S7 -7.5637E-01 6.0805E-02 -2.4927E-02 2.1414E-02 1.3916E-03 1.5806E-03 -1.2420E-03
S8 -2.6827E-01 7.1104E-02 -7.3675E-02 2.9488E-02 -1.1545E-02 1.3273E-03 1.3372E-03
S9 -8.7871E-01 4.2345E-01 -2.2987E-01 1.0277E-01 -3.4100E-02 1.0589E-02 -6.1945E-03
S10 -2.0212E+00 3.6477E-01 -1.4891E-01 7.4398E-02 -3.6768E-02 1.6417E-02 -7.1483E-03
TABLE 6-1
Flour mark A18 A20 A22 A24 A26 A28 A30
S1 4.5179E-07 -4.5276E-06 1.2021E-06 2.6226E-07 0.0000E+00 0.0000E+00 0.0000E+00
S2 -6.1122E-06 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S3 2.0846E-05 -1.2583E-05 1.0191E-05 -7.0162E-06 6.0629E-06 -4.9949E-06 1.8162E-06
S4 7.2170E-06 -7.7490E-07 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S5 2.2710E-04 -1.9204E-05 4.9757E-05 -1.8473E-05 -4.3062E-07 -2.7414E-06 0.0000E+00
S6 7.2415E-05 -3.2974E-04 -1.6646E-06 -5.3204E-05 -9.3107E-06 2.0899E-06 0.0000E+00
S7 2.9664E-04 -2.1169E-04 -8.6928E-05 -1.1939E-04 -4.8658E-05 0.0000E+00 0.0000E+00
S8 -1.4788E-03 -2.8650E-04 5.8602E-04 -1.9103E-04 -8.7926E-05 7.6428E-05 2.3886E-05
S9 3.0494E-03 -3.8847E-05 -1.0427E-03 5.6675E-04 -1.0776E-04 4.0427E-06 0.0000E+00
S10 3.2993E-03 -9.8944E-04 3.7484E-04 8.7736E-06 -3.7723E-05 -2.7627E-05 -7.8972E-05
TABLE 6-2
Fig. 6A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 3, which represents the deviation of the convergent focal points of light rays of different wavelengths after passing through the lens. Fig. 6B shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the optical imaging lens of embodiment 3. 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 chromatic aberration of magnification curve of the optical imaging lens of embodiment 3, which represents a 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 according to 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 structural diagram of an optical imaging lens according to embodiment 4 of the present application.
As shown in fig. 7, the optical imaging lens includes, in order from an object side to an image side: a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a filter E6, and an image forming surface S13.
The first lens element E1 has positive power, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens element E2 has positive power, and has a concave object-side surface S3 and a convex image-side surface S4. The third lens element E3 has negative power, and has a concave object-side surface S5 and a convex image-side surface S6. The fourth lens element E4 has positive power, and has a convex object-side surface S7 and a concave image-side surface S8. The fifth lens element E5 has negative power, and has a convex object-side surface S9 and a concave image-side surface S10. Filter E6 has an object side S11 and an image side S12. The light from the object sequentially passes through the respective surfaces S1 to S12 and is finally imaged on the imaging surface S13.
In this example, the effective focal length f of the optical imaging lens is 2.91mm, the effective focal length f1 of the first lens of the optical imaging lens is 2.50mm, the effective focal length f2 of the second lens is 24.04mm, the effective focal length f3 of the third lens is-2.76 mm, the effective focal length f4 of the fourth lens is 2.55mm, the effective focal length f5 of the fifth lens is-3.21 mm, 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 S13 of the optical imaging lens) is 3.35mm, the half ImgH of the diagonal line length of the effective pixel area on the imaging surface S15 of the optical imaging lens is 2.68mm, the half semifov of the maximum field angle of view of the optical imaging lens is 36.28 °, and the aperture value f of the optical imaging lens is 2.47 no.
Table 7 shows a basic parameter table of the optical imaging lens of embodiment 4, in which the unit of the radius of curvature and the thickness are both millimeters (mm). Tables 8-1 and 8-2 show the high-order term coefficients that can be used for each aspherical mirror surface in example 4, wherein each aspherical mirror surface type can be defined by the formula (1) given in example 1 above.
Figure BDA0003492750300000131
Figure BDA0003492750300000141
TABLE 7
Flour mark A4 A6 A8 A10 A12 A14 A16
S1 -4.7192E-03 -3.9049E-04 -4.2961E-05 4.9241E-07 -2.3893E-06 -1.0068E-06 -1.0797E-06
S2 -4.5307E-02 -3.0317E-03 -4.7336E-05 4.9045E-05 -4.2615E-06 -8.4989E-06 3.1324E-06
S3 -7.3585E-02 4.5332E-05 1.5577E-03 2.7147E-04 4.5162E-05 -3.7129E-05 -3.1846E-05
S4 -1.8617E-02 -2.8251E-04 6.1947E-03 -1.5251E-03 1.3078E-03 -2.5989E-04 4.4342E-05
S5 6.5719E-02 -2.7388E-02 -3.6882E-03 -8.3413E-03 2.6480E-03 -4.6915E-04 8.4752E-04
S6 -2.0569E-02 6.7934E-02 -1.9658E-02 -4.2485E-03 2.1287E-03 -2.3799E-03 -2.7427E-04
S7 -6.7253E-01 5.8010E-02 -1.1424E-03 2.2239E-02 8.3611E-03 1.8361E-03 -4.2138E-03
S8 -2.9247E-01 6.1763E-02 -6.4672E-02 1.9290E-02 -1.3104E-02 2.3833E-03 -8.4099E-04
S9 -9.0834E-01 4.0415E-01 -2.2054E-01 8.8848E-02 -2.8442E-02 1.1552E-02 -5.3501E-03
S10 -2.0212E+00 3.1451E-01 -1.4891E-01 5.4381E-02 -2.7845E-02 8.7942E-03 -5.4196E-03
TABLE 8-1
Flour mark A18 A20 A22 A24 A26 A28 A30
S1 -1.0246E-06 -5.8537E-06 7.6688E-07 2.1020E-06 0.0000E+00 0.0000E+00 0.0000E+00
S2 -3.9747E-06 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S3 1.7666E-05 -1.0622E-05 1.0191E-05 -9.1353E-06 5.1312E-06 -3.8667E-06 1.4104E-06
S4 -1.0748E-05 4.0479E-05 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S5 7.2276E-04 5.5132E-04 1.9826E-04 1.0883E-04 2.1325E-05 -2.7414E-06 0.0000E+00
S6 -9.3444E-05 -4.5407E-04 -3.6273E-04 -1.1338E-04 -8.5848E-05 -5.3210E-05 0.0000E+00
S7 -3.9247E-03 -2.8453E-03 -1.6250E-03 -6.6570E-04 -1.6611E-04 0.0000E+00 0.0000E+00
S8 1.7857E-03 7.8194E-05 1.0267E-03 4.0209E-04 1.0512E-04 1.1206E-04 1.2228E-04
S9 5.4923E-04 -2.6265E-03 -1.9023E-03 -9.7041E-04 -1.0753E-04 0.0000E+00 0.0000E+00
S10 1.6505E-03 -9.8944E-04 3.7484E-04 -1.5426E-04 -7.6553E-05 -1.2006E-04 -1.0844E-04
TABLE 8-2
Fig. 8A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 4, which represents the deviation of the convergent focal points of light rays of different wavelengths after passing through the lens. Fig. 8B shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the optical imaging lens of embodiment 4. 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 chromatic aberration of magnification 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 according to 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 structural diagram of an optical imaging lens according to embodiment 5 of the present application.
As shown in fig. 9, the optical imaging lens includes, in order from an object side to an image side: a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a filter E6, and an image forming surface S13.
The first lens element E1 has positive power, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens element E2 has positive power, and has a concave object-side surface S3 and a convex image-side surface S4. The third lens element E3 has negative power, and has a concave object-side surface S5 and a concave image-side surface S6. The fourth lens element E4 has positive power, and has a convex object-side surface S7 and a convex image-side surface S8. The fifth lens element E5 has negative power, and has a convex object-side surface S9 and a concave image-side surface S10. Filter E6 has an object side S11 and an image side S12. The light from the object sequentially passes through the respective surfaces S1 to S12 and is finally imaged on the imaging surface S13.
In this example, the effective focal length f of the optical imaging lens is 2.85mm, the effective focal length f1 of the first lens of the optical imaging lens is 2.83mm, the effective focal length f2 of the second lens is 18.09mm, the effective focal length f3 of the third lens is-2.85 mm, the effective focal length f4 of the fourth lens is 2.03mm, the effective focal length f5 of the fifth lens is-2.34 mm, 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 S13 of the optical imaging lens) is 3.37mm, the ImgH that is half the diagonal line length of the effective pixel area on the imaging surface S15 of the optical imaging lens is 2.69mm, the semifov of the maximum field angle of view of the optical imaging lens is 42.17 °, and the aperture value f of the optical imaging lens is 2.47.
Table 9 shows a basic parameter table of the optical imaging lens of embodiment 5, in which the unit of the radius of curvature and the thickness are both millimeters (mm). Tables 10-1 and 10-2 show the high-order term coefficients that can be used for each aspherical mirror surface in example 5, wherein each aspherical mirror surface type can be defined by the formula (1) given in example 1 above.
Figure BDA0003492750300000151
TABLE 9
Figure BDA0003492750300000152
Figure BDA0003492750300000161
TABLE 10-1
Flour mark A18 A20 A22 A24 A26 A28 A30
S1 2.1505E-06 -3.3108E-06 3.1240E-06 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S2 -5.1162E-06 7.1671E-06 -7.9812E-06 2.8708E-07 -4.3795E-06 2.2733E-06 -1.0128E-07
S3 1.2548E-05 -8.8464E-06 8.1362E-07 -2.1165E-06 0.0000E+00 0.0000E+00 0.0000E+00
S4 4.3323E-05 -2.5701E-05 7.3018E-06 -6.4690E-06 -4.9041E-06 3.8745E-07 8.9304E-07
S5 7.5064E-05 -7.9518E-05 2.8952E-05 -9.4885E-06 2.3207E-06 6.5296E-07 1.1295E-06
S6 3.7129E-04 -1.7820E-04 1.1814E-04 -7.0628E-05 3.6875E-05 -6.2200E-07 -4.2681E-06
S7 4.4017E-04 -9.6641E-04 2.5212E-04 4.5307E-05 4.8077E-05 -5.1784E-05 6.5185E-06
S8 -8.9521E-04 1.7644E-03 -6.0591E-04 -7.6600E-04 3.6877E-04 1.0143E-04 -6.0740E-05
S9 5.1966E-03 -4.5492E-03 1.7588E-03 7.8386E-04 -1.2003E-03 5.6425E-04 -8.7621E-05
S10 6.3610E-03 -3.4080E-03 2.0813E-03 -5.5571E-04 1.9651E-04 -1.4257E-04 7.9791E-05
TABLE 10-2
Fig. 10A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 5, which represents the deviation of the convergent focal points of light rays of different wavelengths after passing through the lens. Fig. 10B shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the optical imaging lens of embodiment 5. 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 chromatic aberration of magnification curve of the optical imaging lens of embodiment 5, which represents a deviation of different image heights on the imaging surface after light passes through the lens. As can be seen from fig. 10A to 10D, the optical imaging lens according to embodiment 5 can achieve good imaging quality.
In summary, examples 1 to 5 satisfy the relationships shown in table 11, respectively.
Conditions/examples 1 2 3 4 5
ET5/CT5 0.97 0.75 1.09 1.02 1.00
∑AT/TTL 0.19 0.23 0.23 0.23 0.21
TTL/ImgH 1.30 1.25 1.25 1.25 1.25
T12/T23 4.54 2.46 2.46 2.46 2.25
T45/T12 1.54 1.05 1.05 1.06 1.49
f*tan(Semi-FOV/2) 1.11 1.00 0.99 0.95 1.10
CT1/(CT2+CT3+CT4) 1.01 1.10 1.10 1.10 0.99
(R7+R10)/f 1.08 0.80 0.80 0.85 0.76
SAG51/T45 -1.18 -1.64 -1.70 -1.51 -1.52
DT21/DT12 1.02 1.01 1.01 1.01 1.01
ET4/CT4 0.54 0.71 0.68 0.82 0.49
|f2/(R3+R4)| 1.08 1.76 1.74 1.85 2.09
SAG21/T12 -0.69 -0.42 -0.42 -0.44 -0.55
SAG41/T34 -0.54 -1.21 -1.04 -0.83 -0.85
(f1+f4)/f 1.66 1.64 1.63 1.74 1.70
TABLE 11
The above description is only a preferred embodiment of the application and is illustrative of the principles of the technology employed. It will be appreciated by a person skilled in the art that the scope of the invention as referred to in the present application is not limited to the embodiments with a specific combination of the above-mentioned features, but also covers other embodiments with any combination of the above-mentioned features or their equivalents without departing from the inventive concept. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.

Claims (10)

1. An optical imaging lens includes a first lens element, a second lens element, a third lens element, a fourth lens element, and a fifth lens element, wherein the first lens element to the fifth lens element are sequentially disposed along an optical axis from an object side to an image side,
it is characterized in that the preparation method is characterized in that,
the image side surface of the first lens is a concave surface;
the object side surface of the second lens is a concave surface, and the image side surface of the second lens is a convex surface;
the third lens has a negative optical power;
the object side surface of the fourth lens is a convex surface;
the object side surface of the fifth lens is a convex surface, and the image side surface of the fifth lens is a concave surface;
the distance TTL from the object side surface of the first lens to the imaging surface of the optical imaging lens on the optical axis and the half ImgH of the diagonal length of the effective pixel area on the imaging surface satisfy that: TTL/ImgH < 1.5; and
a distance T12 between an image-side surface of the first lens and an object-side surface of the second lens on the optical axis and a distance T34 between an image-side surface of the third lens and an object-side surface of the fourth lens on the optical axis satisfy: T12/T34> 1.57.
2. The optical imaging lens of claim 1, wherein an effective focal length f of the optical imaging lens, a radius of curvature R7 of an object-side surface of the fourth lens, and a radius of curvature R10 of an image-side surface of the fifth lens satisfy: 0.2< (R7+ R10)/f < 1.8.
3. The optical imaging lens of claim 1, wherein the radius of curvature of the object-side surface of the second lens, R3, the radius of curvature of the image-side surface of the second lens, R4, and the effective focal length of the second lens, f2, satisfy: 0.5< | f2/(R3+ R4) | < 2.6.
4. The optical imaging lens of claim 1, wherein a distance T45 on the optical axis from the image-side surface of the fourth lens to the object-side surface of the fifth lens, and a distance SAG51 on the optical axis between an intersection point of the object-side surface of the fifth lens and the optical axis and a vertex of an effective radius of the object-side surface of the fifth lens satisfy: -2.5< SAG51/T45 ≦ -1.18.
5. The optical imaging lens of claim 1, wherein a center thickness CT1 of the first lens on the optical axis, a center thickness CT2 of the second lens on the optical axis, a center thickness CT3 of the third lens on the optical axis, and a center thickness CT4 of the fourth lens on the optical axis satisfy: 0.5< CT1/(CT2+ CT3+ CT4) < 1.5.
6. The optical imaging lens of claim 1, wherein a distance T12 on the optical axis from the image-side surface of the first lens to the object-side surface of the second lens and a distance T45 on the optical axis from the image-side surface of the fourth lens to the object-side surface of the fifth lens satisfy: 0< T45/T12< 2.44.
7. The optical imaging lens of claim 1, wherein a distance T12 on the optical axis from the image-side surface of the first lens to the object-side surface of the second lens, and a distance SAG21 on the optical axis between an intersection point of the object-side surface of the second lens and the optical axis and a vertex of an effective radius of the object-side surface of the second lens satisfy: -1< SAG21/T12 ≦ 0.42.
8. The optical imaging lens of claim 1, wherein the effective half aperture DT12 of the image side surface of the first lens and the effective half aperture DT21 of the object side surface of the second lens satisfy: 0.7< DT21/DT12< 1.5.
9. The optical imaging lens of claim 1, wherein a center thickness CT4 of the fourth lens on the optical axis and an edge thickness ET4 of the fourth lens satisfy: 0.2< ET4/CT4< 1.
10. An optical imaging lens includes a first lens element, a second lens element, a third lens element, a fourth lens element, and a fifth lens element, wherein the first lens element to the fifth lens element are sequentially disposed along an optical axis from an object side to an image side,
it is characterized in that the preparation method is characterized in that,
the image side surface of the first lens is a concave surface;
the object side surface of the second lens is a concave surface, and the image side surface of the second lens is a convex surface;
the third lens has a negative optical power;
the object side surface of the fourth lens is a convex surface;
the object side surface of the fifth lens is a convex surface, and the image side surface of the fifth lens is a concave surface;
the distance TTL from the object side surface of the first lens to the imaging surface of the optical imaging lens on the optical axis and the half ImgH of the diagonal length of the effective pixel area on the imaging surface satisfy that: TTL/ImgH < 1.5; and
a center thickness CT1 of the first lens on the optical axis, a center thickness CT2 of the second lens on the optical axis, a center thickness CT3 of the third lens on the optical axis, and a center thickness CT4 of the fourth lens on the optical axis satisfy: 0.5< CT1/(CT2+ CT3+ CT4) < 1.5.
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Cited By (1)

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CN116360077A (en) * 2023-03-03 2023-06-30 广州瑞格尔电子有限公司 Large-view-field short-focus projection lens and LCD projector

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CN211086760U (en) * 2019-10-18 2020-07-24 浙江舜宇光学有限公司 Optical imaging lens
US20210003828A1 (en) * 2018-12-13 2021-01-07 Zhejiang Sunny Optical Co., Ltd Optical imaging lens assembly

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Publication number Priority date Publication date Assignee Title
CN107462976A (en) * 2017-09-13 2017-12-12 浙江舜宇光学有限公司 Pick-up lens
US20210003828A1 (en) * 2018-12-13 2021-01-07 Zhejiang Sunny Optical Co., Ltd Optical imaging lens assembly
CN211086760U (en) * 2019-10-18 2020-07-24 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
CN116360077A (en) * 2023-03-03 2023-06-30 广州瑞格尔电子有限公司 Large-view-field short-focus projection lens and LCD projector
CN116360077B (en) * 2023-03-03 2023-11-03 广州瑞格尔电子有限公司 Large-view-field short-focus projection lens and LCD projector

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