CN111443464A - Optical imaging lens group - Google Patents
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- CN111443464A CN111443464A CN202010429832.0A CN202010429832A CN111443464A CN 111443464 A CN111443464 A CN 111443464A CN 202010429832 A CN202010429832 A CN 202010429832A CN 111443464 A CN111443464 A CN 111443464A
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- 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
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Abstract
The application discloses an optical imaging lens group, which sequentially comprises a first lens with negative focal power, a second lens with the focal power, a third lens with the focal power, a fourth lens with the negative focal power, a fifth lens with the focal power and a sixth lens with the focal power, wherein the image side surface of the second lens is convex, the object side surface of the third lens is convex, the object side surface of the fourth lens is convex, the object side surface of the fifth lens is convex, the maximum field angle FOV of the optical imaging lens group and the distance TT L between the object side surface of the first lens and the imaging surface of the optical imaging lens group on the optical axis satisfy that 2.5mm‑1＜10×tan(FOV/2)/TTL＜4mm‑1(ii) a And the maximum effective radius DT11 of the object side surface of the first lens and the maximum effective radius DT61 of the object side surface of the sixth lens meet: 0.5 < DT11/DT61 < 1.
Description
Technical Field
The application relates to the field of optical elements, in particular to an optical imaging lens group.
Background
With the development of science and technology, portable electronic devices such as mobile phones and tablet computers are rapidly developed, and the imaging requirements of people on the optical imaging lens group are higher and higher. With the trend that portable electronic devices such as mobile phones and tablet computers are gradually becoming thinner and lighter, and smaller in size, thinner bodies and smaller spaces present a great challenge to lenses that undertake the task of taking pictures.
How to make an optical imaging lens group give consideration to lightness, thinness, miniaturization and high resolution at the same time is one of the problems that many designers of camera lenses need to pay attention to and solve at present.
Disclosure of Invention
The application provides an optical imaging lens group which sequentially comprises a first lens with negative focal power, a second lens with focal power, a third lens with focal power, a fourth lens with negative focal power, a fifth lens with focal power and a sixth lens with focal power, wherein the image side surface of the second lens is convex, the object side surface of the third lens is convex, the object side surface of the sixth lens is convex, the maximum field angle FOV of the optical imaging lens group and the distance TT L between the object side surface of the first lens and the imaging surface of the optical imaging lens group on the optical axis can satisfy 2.5mm-1＜10×tan(FOV/2)/TTL＜4mm-1(ii) a And the maximum effective radius DT11 of the object side surface of the first lens and the maximum effective radius DT61 of the object side surface of the sixth lens can satisfy: 0.5 < DT11/DT61 < 1.
In one embodiment, the object-side surface of the first lens element and the image-side surface of the sixth lens element have at least one aspheric mirror surface.
In one embodiment, the radius of curvature R11 of the object-side surface of the sixth lens element and the total effective focal length f of the optical imaging lens group satisfy: 0 < R11/f < 1.
In one embodiment, a distance TT L from the object side surface of the first lens to the imaging surface of the optical imaging lens group on the optical axis and a half of a diagonal length ImgH of the effective pixel area of the optical imaging lens group satisfy TT L/ImgH < 1.8.
In one embodiment, the effective focal length f1 of the first lens and the effective focal length f4 of the fourth lens may satisfy: 0 < f1/f4 < 1.
In one embodiment, the effective focal length f3 of the third lens and the effective focal length f4 of the fourth lens may satisfy: f3/f4 > 0.
In one embodiment, a separation distance T12 on the optical axis of the first lens and the second lens, a separation distance T23 on the optical axis of the second lens and the third lens, a separation distance T34 on the optical axis of the third lens and the fourth lens, a separation distance T45 on the optical axis of the fourth lens and the fifth lens, and a separation distance T56 on the optical axis of the fifth lens and the sixth lens may satisfy: 0 < T12/(T23+ T34+ T45+ T56) < 1.5.
In one embodiment, the central thickness CT3 of the third lens on the optical axis and the separation distance T34 of the third lens and the fourth lens on the optical axis may satisfy: CT3/T34 < 1.5.
In one embodiment, the distance SAG11 on the optical axis from the intersection point of the object-side surface of the first lens and the optical axis to the effective radius vertex of the object-side surface of the first lens and the central thickness CT1 of the first lens may satisfy: 0 < SAG11/CT1 < 1.
In one embodiment, the radius of curvature R5 of the object-side surface of the third lens and the radius of curvature R4 of the image-side surface of the second lens may satisfy: -5 < R5/R4 < 0.
In one embodiment, the distance SAG31 on the optical axis from the intersection point of the object-side surface of the third lens and the optical axis to the effective radius vertex of the object-side surface of the third lens and the central thickness CT3 of the third lens may satisfy: -0.5 < SAG31/CT3 < 0.
In one embodiment, the edge thickness ET3 of the third lens and the center thickness CT3 of the third lens may satisfy: 1.5 < ET3/CT3 < 2.5.
In one embodiment, the distance SAG51 on the optical axis from the intersection point of the object-side surface of the fifth lens and the optical axis to the effective radius vertex of the object-side surface of the fifth lens and the center thickness CT5 of the fifth lens may satisfy: -0.5 < SAG51/CT5 < 0.
In one embodiment, the image-side surface of the fourth lens has at least one inflection point, and the vertical distance YC42 from the inflection point to the optical axis and the maximum effective radius DT42 of the image-side surface of the fourth lens satisfy: YC42/DT42 is more than 0 and less than 0.5.
In one embodiment, the separation distance T23 between the second lens and the third lens on the optical axis and the separation distance T34 between the third lens and the fourth lens on the optical axis may satisfy: 0 < T23/T34 < 0.5.
In one embodiment, the radius of curvature R2 of the image-side surface of the first lens and the radius of curvature R3 of the object-side surface of the second lens may satisfy: 0.8 < R2/R3 < 1.2.
In one embodiment, the object side surface of the first lens is concave.
In one embodiment, the third lens has a negative optical power.
In one embodiment, the object side surface of the fifth lens is convex.
Another aspect of the present disclosure provides an optical imaging lens assembly, in order from an object side to an image side along an optical axis, comprising: a first lens having an optical power; the image side surface of the second lens is a convex surface; a third lens with negative focal power, wherein the object side surface of the third lens is a convex surface; a fourth lens having an optical power; a fifth lens having optical power; and a sixth lens having a refractive power, an object side surface of which is convex. The curvature radius R11 of the object side surface of the sixth lens and the total effective focal length f of the optical imaging lens group meet the following conditions: r11/f is more than 0 and less than 1; and the maximum effective radius DT11 of the object side surface of the first lens and the maximum effective radius DT61 of the object side surface of the sixth lens meet: 0.5 < DT11/DT61 < 1.
The application provides an optical imaging lens group which is applicable to portable electronic products, and has light weight, thinness, miniaturization, high resolution and good imaging quality through reasonable distribution focal power and optimization of optical parameters.
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 group according to embodiment 1 of the present application;
fig. 2A to 2D respectively show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a chromatic aberration of magnification curve of the optical imaging lens group of embodiment 1;
fig. 3 shows a schematic structural view of an optical imaging lens group 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 chromatic aberration of magnification curve, respectively, of the optical imaging lens group of embodiment 2;
fig. 5 is a schematic view showing a structure of an optical imaging lens group 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 chromatic aberration of magnification curve, respectively, of the optical imaging lens group of embodiment 3;
fig. 7 is a schematic view showing a structure of an optical imaging lens group 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 group of embodiment 4;
fig. 9 is a schematic view showing a structure of an optical imaging lens group according to embodiment 5 of the present application;
fig. 10A to 10D respectively show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a chromatic aberration of magnification curve of the optical imaging lens group of example 5;
fig. 11 is a schematic view showing a structure of an optical imaging lens group 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 chromatic aberration of magnification curve, respectively, of the optical imaging lens group of example 6.
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.
The optical imaging lens group according to an 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 along the optical axis in sequence from the object side to the image side. Any adjacent two lenses of the first lens to the sixth lens can have a spacing distance therebetween.
In an exemplary embodiment, the first lens may have a negative power; the second lens can have positive focal power or negative focal power, and the image side surface of the second lens can be a convex surface; the third lens can have positive focal power or negative focal power, and the object side surface of the third lens can be a convex surface; the fourth lens may have a negative optical power; the fifth lens may have a positive power or a negative power; and the sixth lens can have positive power or negative power, and the object side surface can be a convex surface.
In an exemplary embodiment, an optical imaging lens group according to the present application may satisfy: 2.5mm-1＜10×tan(FOV/2)/TTL＜4mm-1Where FOV is the maximum field angle of the optical imaging lens group and TT L is the distance on the optical axis from the object side surface of the first lens to the imaging surface of the optical imaging lens group more specifically, FOV and TT L may further satisfy 2.8mm-1＜10×tan(FOV/2)/TTL＜3.2mm-1. Satisfies the requirement of 2.5mm-1＜10×tan(FOV/2)/TTL＜4mm-1The ultra-wide angle and ultra-thin characteristic can be realized, high resolution can be considered, and the optical imaging lens group has better imaging quality.
In an exemplary embodiment, an optical imaging lens group according to the present application may satisfy: 0 < R11/f < 1, where R11 is the radius of curvature of the object-side surface of the sixth lens and f is the total effective focal length of the optical imaging lens group. More specifically, R11 and f further satisfy: r11/f is more than 0.4 and less than 0.8. Satisfying 0 < R11/f < 1 can well balance the distribution of focal power and is beneficial to correcting the off-axis aberration of the system.
In an exemplary embodiment, an optical imaging lens group according to the present application may satisfy TT L/ImgH < 1.8, where TT L is a distance on an optical axis from an object side surface of a first lens to an imaging surface of the optical imaging lens group, and ImgH is a half of a diagonal length of an effective pixel region of the optical imaging lens group, and it satisfies TT L/ImgH < 1.8, which is advantageous in that an ultra-thin characteristic of a system can be well achieved while ensuring an imaging quality of the system.
In an exemplary embodiment, an optical imaging lens group according to the present application may satisfy: 0 < f1/f4 < 1, where f1 is the effective focal length of the first lens and f4 is the effective focal length of the fourth lens. More specifically, f1 and f4 may further satisfy: f1/f4 is more than 0 and less than 0.6. Satisfying 0 < f1/f4 < 1, and can correct axial and off-axis aberration of the system well.
In an exemplary embodiment, an optical imaging lens group according to the present application may satisfy: f3/f4 > 0, where f3 is the effective focal length of the third lens and f4 is the effective focal length of the fourth lens. Satisfying f3/f4 > 0, the axial and off-axis aberration of the system can be corrected well.
In an exemplary embodiment, an optical imaging lens group according to the present application may satisfy: 0 < T12/(T23+ T34+ T45+ T56) < 1.5, where T12 is a distance between the first lens and the second lens on the optical axis, T23 is a distance between the second lens and the third lens on the optical axis, T34 is a distance between the third lens and the fourth lens on the optical axis, T45 is a distance between the fourth lens and the fifth lens on the optical axis, and T56 is a distance between the fifth lens and the sixth lens on the optical axis. More specifically, T12, T23, T34, T45, and T56 may further satisfy: 0.4 < T12/(T23+ T34+ T45+ T56) < 1.1. The optical power distribution requirement is 0 < T12/(T23+ T34+ T45+ T56) < 1.5, and the optical power distribution of the system is favorably realized, and the axial aberration of the system is favorably corrected.
In an exemplary embodiment, an optical imaging lens group according to the present application may satisfy: CT3/T34 < 1.5, where CT3 is the central thickness of the third lens on the optical axis, and T34 is the separation distance between the third lens and the fourth lens on the optical axis. More specifically, CT3 and T34 further satisfy: CT3/T34 < 1.0. The CT3/T34 is satisfied and is less than 1.5, which is beneficial to correcting the axial chromatic aberration of the system and simultaneously is beneficial to improving the imaging characteristic of the off-axis visual field.
In an exemplary embodiment, an optical imaging lens group according to the present application may satisfy: 0.5 < DT11/DT61 < 1, where DT11 is the maximum effective radius of the object-side face of the first lens and DT61 is the maximum effective radius of the object-side face of the sixth lens. More specifically, DT11 and DT61 further satisfy: 0.5 < DT11/DT61 < 0.8. The ultra-thin characteristic of the system can be better realized by meeting the requirement that DT11/DT61 is less than 1 and is 0.5.
In an exemplary embodiment, an optical imaging lens group according to the present application may satisfy: 0 < SAG11/CT1 < 1, wherein SAG11 is a distance on the optical axis from an intersection point of the object-side surface of the first lens and the optical axis to an effective radius vertex of the object-side surface of the first lens, and CT1 is a center thickness of the first lens. More specifically, SAG11 and CT1 further satisfy: 0.2 < SAG11/CT1 < 0.7. The super wide-angle field can be better shared and the characteristics of the first lens in the super wide-angle system can be better embodied when 0 < SAG11/CT1 < 1 is satisfied.
In an exemplary embodiment, an optical imaging lens group according to the present application may satisfy: -5 < R5/R4 < 0, wherein R5 is the radius of curvature of the object-side surface of the third lens and R4 is the radius of curvature of the image-side surface of the second lens. More specifically, R5 and R4 may further satisfy: -4.2 < R5/R4 < -2.6. And the optical power of the image side surface of the second lens and the object side surface of the third lens can be better balanced and the focusing function can be better realized by satisfying-5 < R5/R4 < 0.
In an exemplary embodiment, an optical imaging lens group according to the present application may satisfy: -0.5 < SAG31/CT3 < 0, wherein SAG31 is the distance on the optical axis from the intersection of the object-side surface of the third lens and the optical axis to the vertex of the effective radius of the object-side surface of the third lens, and CT3 is the center thickness of the third lens. More specifically, SAG31 and CT3 further satisfy: -0.3 < SAG31/CT3 < -0.1. The coma, curvature of field, vertical axis chromatic aberration and the like of the system can be effectively corrected by satisfying-0.5 < SAG31/CT3 < 0.
In an exemplary embodiment, an optical imaging lens group according to the present application may satisfy: 1.5 < ET3/CT3 < 2.5, wherein ET3 is the edge thickness of the third lens and CT3 is the center thickness of the third lens. More specifically, ET3 and CT3 further satisfy: 1.8 < ET3/CT3 < 2.2. The requirements that ET3/CT3 is more than 1.5 and less than 2.5 are met, and the axial chromatic aberration and the chromatic spherical aberration can be well corrected while the processing feasibility is ensured.
In an exemplary embodiment, an optical imaging lens group according to the present application may satisfy: -0.5 < SAG51/CT5 < 0, wherein 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, and CT5 is the center thickness of the fifth lens. More specifically, SAG51 and CT5 further satisfy: -0.3 < SAG51/CT5 < 0. The off-axis aberration of the system, such as field curvature, distortion, vertical axis aberration and the like, can be well corrected to ensure that the system obtains better imaging quality when the-0.5 < SAG51/CT5 < 0 is satisfied.
In an exemplary embodiment, an optical imaging lens group according to the present application may satisfy: 0 < YC42/DT42 < 0.5, where YC42 is the vertical distance from the inflection point of the image-side surface of the fourth lens to the optical axis, and DT42 is the maximum effective radius of the image-side surface of the fourth lens. More specifically, YC42 and DT42 further satisfy: YC42/DT42 is more than 0.3 and less than 0.5. The requirements that YC42/DT42 is more than 0 and less than 0.5 are met, the distortion and the curvature of field of the system can be better corrected, and the smaller distortion is obtained under the condition that the performance of the system is ensured.
In an exemplary embodiment, an optical imaging lens group according to the present application may satisfy: 0 < T23/T34 < 0.5, wherein T23 is the distance of the second lens and the third lens from each other on the optical axis, and T34 is the distance of the third lens and the fourth lens from each other on the optical axis. More specifically, T23 and T34 may further satisfy: 0.2 < T23/T34 < 0.5.
In an exemplary embodiment, an optical imaging lens group according to the present application may satisfy: 0.8 < R2/R3 < 1.2, wherein R2 is the radius of curvature of the image-side surface of the first lens and R3 is the radius of curvature of the object-side surface of the second lens. More specifically, R2 and R3 may further satisfy: 0.8 < R2/R3 < 1.1.
In an exemplary embodiment, the object side surface of the first lens may be concave.
In an exemplary embodiment, the third lens may have a negative power.
In an exemplary embodiment, the object side surface of the fifth lens may be convex.
In an exemplary embodiment, an optical imaging lens group according to the present application further includes a stop disposed between the first lens and the second lens. Optionally, the optical imaging lens group may further include a filter for correcting color deviation and/or a protective glass for protecting a photosensitive element on an imaging surface. The application provides an optical imaging lens group with the characteristics of miniaturization, super wide angle, lightness and thinness, high resolution, high imaging quality and the like. The optical imaging lens group according to the above-described embodiment of the present application may employ a plurality of lenses, for example, the above six lenses. By reasonably distributing the focal power and the surface type of each lens, the central thickness of each lens, the axial distance between each lens and the like, incident light can be effectively converged, the optical total length of the imaging lens is reduced, the machinability of the imaging lens is improved, and the optical imaging lens group is more favorable for production and processing.
In the embodiment of the present application, at least one of the mirror surfaces of each lens is an aspherical mirror surface, that is, at least one of the object-side surface of the first lens to the image-side surface of the sixth lens 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 during imaging can be eliminated as much as possible, thereby improving the imaging quality. Optionally, at least one of an object-side surface and an image-side surface of each of the first lens, the second lens, the third lens, the fourth lens, the fifth lens, and the sixth lens is an aspheric mirror surface. Optionally, each of the first, second, third, fourth, fifth, and sixth lenses has an object-side surface and an image-side surface that are aspheric mirror surfaces.
However, it will be appreciated by those skilled in the art that the number of lenses constituting the optical imaging lens group can be varied to achieve the various results and advantages described in the present specification without departing from the claimed subject matter. For example, although six lenses are exemplified in the embodiment, the optical imaging lens group is not limited to including six lenses. The optical imaging lens group may also include other numbers of lenses, if desired.
Specific examples of the optical imaging lens group applicable to the above-described embodiments are further described below with reference to the drawings.
Example 1
An optical imaging lens group 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 group according to embodiment 1 of the present application.
As shown in fig. 1, the optical imaging lens assembly, in order from an object side to an image side, comprises: a first lens E1, a stop STO, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter E7, and an image forming surface S15.
The first lens element E1 has negative power, and has a concave object-side surface S1 and a concave image-side surface S2. The second lens element E2 has positive power, and has a convex 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 negative power, and has a convex object-side surface S7 and a concave image-side surface S8. The fifth lens element E5 has positive power, and has a convex object-side surface S9 and a convex image-side surface S10. The sixth lens element E6 has negative power, and has a convex object-side surface S11 and a concave image-side surface S12. Filter E7 has an object side S13 and an image side S14. The light from the object sequentially passes through the respective surfaces S1 to S14 and is finally imaged on the imaging surface S15.
Table 1 shows a basic parameter table of the optical imaging lens group of embodiment 1, in which the units of the radius of curvature, thickness/distance, and focal length are all millimeters (mm).
TABLE 1
In this example, the total effective focal length f of the optical imaging lens group is 2.42mm, the total length TT L of the optical imaging lens group (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 group) is 5.88mm, the half ImgH of the diagonal length of the effective pixel area on the imaging surface S15 of the optical imaging lens group is 3.38mm, and the maximum field angle FOV of the optical imaging lens group is 119.5 °.
In embodiment 1, the object-side surface and the image-side surface of any one of the first lens E1 through the sixth lens E6 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:
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 that can be used for the aspherical mirror surfaces S1 through S12 in example 1 are shown in tables 2-1 and 2-2 below4、A6、A8、A10、A12、A14、A16、A18、A20、A22、A24、A26、A28And A30。
| Flour mark | A4 | A6 | A8 | A10 | A12 | A14 | A16 |
| S1 | 1.8317E-01 | -1.2397E-01 | 9.6306E-02 | -6.0972E-02 | 2.6264E-02 | -6.2239E-03 | -5.6293E-04 |
| S2 | 2.8846E-01 | 3.8685E-02 | -1.0494E+00 | 5.5476E+00 | -1.5708E+01 | 2.8381E+01 | -3.1998E+01 |
| S3 | -7.4158E-02 | 6.0284E-01 | -9.8813E+00 | 8.0103E+01 | -4.0865E+02 | 1.3058E+03 | -2.5509E+03 |
| S4 | 3.0945E-02 | -4.6760E-01 | 2.1274E+00 | -7.6681E+00 | 1.8467E+01 | -3.0029E+01 | 3.1367E+01 |
| S5 | -2.8341E-02 | -3.9740E-01 | 1.7232E+00 | -5.7800E+00 | 1.2873E+01 | -1.9058E+01 | 1.7709E+01 |
| S6 | 1.0226E-01 | -3.6967E-01 | 9.8288E-01 | -2.0540E+00 | 3.0565E+00 | -3.0974E+00 | 2.0165E+00 |
| S7 | -1.7521E-02 | -1.0785E-01 | 4.0004E-01 | -6.2159E-01 | 4.8830E-01 | -9.4633E-02 | -1.2547E-01 |
| S8 | 1.1990E-01 | -1.0276E+00 | 2.3696E+00 | -3.7859E+00 | 4.1682E+00 | -3.0436E+00 | 1.3921E+00 |
| S9 | 2.9753E-01 | -9.3161E-01 | 1.3963E+00 | -5.4167E-01 | -3.1189E+00 | 9.1313E+00 | -1.4252E+01 |
| S10 | -9.0556E-02 | 7.1282E-01 | -2.0296E+00 | 3.2862E+00 | -2.4249E+00 | -1.1462E+00 | 4.5850E+00 |
| S11 | 2.1143E-02 | -9.1570E-01 | 2.6653E+00 | -6.2625E+00 | 1.1849E+01 | -1.6658E+01 | 1.6786E+01 |
| S12 | -3.5580E-01 | 3.8634E-01 | -3.5933E-01 | 2.8762E-01 | -1.9169E-01 | 1.0064E-01 | -3.9961E-02 |
TABLE 2-1
| Flour mark | A18 | A20 | A22 | A24 | A26 | A28 | A30 |
| S1 | 7.1447E-04 | -1.1673E-04 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S2 | 2.0401E+01 | -5.6494E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S3 | 2.7828E+03 | -1.3015E+03 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S4 | -1.8876E+01 | 4.8754E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S5 | -9.2493E+00 | 2.0676E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S6 | -7.5483E-01 | 1.2335E-01 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S7 | 8.8655E-02 | -1.7824E-02 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S8 | -3.5605E-01 | 3.8417E-02 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S9 | 1.4941E+01 | -1.1027E+01 | 5.7353E+00 | -2.0537E+00 | 4.8091E-01 | -6.6202E-02 | 4.0578E-03 |
| S10 | -5.1025E+00 | 3.2996E+00 | -1.3813E+00 | 3.8080E-01 | -6.7003E-02 | 6.8387E-03 | -3.0866E-04 |
| S11 | -1.2031E+01 | 6.1210E+00 | -2.1915E+00 | 5.3955E-01 | -8.6937E-02 | 8.2543E-03 | -3.5013E-04 |
| S12 | 1.1750E-02 | -2.5253E-03 | 3.9043E-04 | -4.2235E-05 | 3.0336E-06 | -1.3000E-07 | 2.5165E-09 |
Tables 2 to 2
Fig. 2A shows an on-axis chromatic aberration curve of the optical imaging lens group of embodiment 1, which represents a convergent focus deviation of light rays of different wavelengths after passing through the lens. Fig. 2B shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the optical imaging lens group of embodiment 1. Fig. 2C shows a distortion curve of the optical imaging lens group 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 group of embodiment 1, which represents a deviation of different image heights on an imaging surface after light passes through the lens. As can be seen from fig. 2A to 2D, the optical imaging lens assembly of embodiment 1 can achieve good imaging quality.
Example 2
An optical imaging lens group 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 view of an optical imaging lens group according to embodiment 2 of the present application.
As shown in fig. 3, the optical imaging lens assembly, in order from an object side to an image side, comprises: a first lens E1, a stop STO, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter E7, and an image forming surface S15.
The first lens element E1 has negative power, and has a concave object-side surface S1 and a concave image-side surface S2. The second lens element E2 has positive power, and has a convex 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 negative power, and has a convex object-side surface S7 and a concave image-side surface S8. The fifth lens element E5 has positive power, and has a convex object-side surface S9 and a convex image-side surface S10. The sixth lens element E6 has negative power, and has a convex object-side surface S11 and a concave image-side surface S12. Filter E7 has an object side S13 and an image side S14. The 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 total effective focal length f of the optical imaging lens group is 2.48mm, the total length TT L of the optical imaging lens group is 5.50mm, the half ImgH of the diagonal length of the effective pixel area on the imaging surface S15 of the optical imaging lens group is 3.38mm, and the maximum field angle FOV of the optical imaging lens group is 118.7 °.
Table 3 shows a basic parameter table of the optical imaging lens group of embodiment 2, in which the units of the radius of curvature, thickness/distance, and focal length are all millimeters (mm). Tables 4-1, 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.
TABLE 3
| Flour mark | A4 | A6 | A8 | A10 | A12 | A14 | A16 |
| S1 | 2.6368E-01 | -3.1347E-01 | 4.9887E-01 | -8.6276E-01 | 1.1816E+00 | -1.1385E+00 | 7.0848E-01 |
| S2 | 4.5620E-01 | -7.8132E-01 | 5.1319E+00 | -2.8248E+01 | 1.0832E+02 | -2.7052E+02 | 4.1913E+02 |
| S3 | -1.9402E-02 | 1.0665E-01 | -3.2189E+00 | 2.0984E+01 | -8.4954E+01 | 1.9926E+02 | -2.6300E+02 |
| S4 | -1.5961E-02 | -7.2340E-02 | -1.8806E-01 | 2.1215E+00 | -1.0224E+01 | 2.4908E+01 | -3.3522E+01 |
| S5 | -7.0986E-02 | -5.8963E-02 | 1.1327E-01 | -5.8552E-01 | 1.5698E+00 | -2.8601E+00 | 3.1380E+00 |
| S6 | 9.8774E-02 | -3.5895E-01 | 9.8191E-01 | -2.1931E+00 | 3.5621E+00 | -3.9820E+00 | 2.8789E+00 |
| S7 | -6.6854E-02 | 5.6000E-02 | -6.4459E-02 | 3.9748E-01 | -1.0017E+00 | 1.2800E+00 | -8.8969E-01 |
| S8 | 1.3808E-01 | -1.1517E+00 | 2.9118E+00 | -5.1711E+00 | 6.1240E+00 | -4.6368E+00 | 2.1378E+00 |
| S9 | 3.3330E-01 | -1.1330E+00 | 2.4386E+00 | -3.4578E+00 | 2.6127E+00 | 3.7667E-01 | -3.7403E+00 |
| S10 | -2.8418E-01 | 1.5955E+00 | -4.9229E+00 | 1.1179E+01 | -1.7588E+01 | 1.8912E+01 | -1.4142E+01 |
| S11 | 4.5815E-02 | -1.0488E+00 | 3.1219E+00 | -6.2998E+00 | 9.8391E+00 | -1.2156E+01 | 1.1409E+01 |
| S12 | -4.3038E-01 | 5.0542E-01 | -3.3109E-01 | 8.1072E-03 | 1.8619E-01 | -1.8157E-01 | 9.8023E-02 |
TABLE 4-1
| Flour mark | A18 | A20 | A22 | A24 | A26 | A28 | A30 |
| S1 | -2.5311E-01 | 3.9467E-02 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S2 | -3.6658E+02 | 1.3913E+02 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S3 | 1.7167E+02 | -4.5365E+01 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S4 | 2.3874E+01 | -7.0999E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S5 | -1.8830E+00 | 5.0478E-01 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S6 | -1.2056E+00 | 2.2251E-01 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S7 | 3.2204E-01 | -4.7854E-02 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S8 | -5.4126E-01 | 5.7231E-02 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S9 | 5.2247E+00 | -4.2834E+00 | 2.3137E+00 | -8.2934E-01 | 1.8956E-01 | -2.4956E-02 | 1.4366E-03 |
| S10 | 7.4923E+00 | -2.8439E+00 | 7.7412E-01 | -1.4907E-01 | 1.9539E-02 | -1.5856E-03 | 6.0815E-05 |
| S11 | -7.8329E+00 | 3.8523E+00 | -1.3349E+00 | 3.1769E-01 | -4.9413E-02 | 4.5254E-03 | -1.8518E-04 |
| S12 | -3.5095E-02 | 8.7506E-03 | -1.5318E-03 | 1.8491E-04 | -1.4669E-05 | 6.8847E-07 | -1.4483E-08 |
TABLE 4-2
Fig. 4A shows an on-axis chromatic aberration curve of the optical imaging lens group of embodiment 2, which represents a convergent focus deviation 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 group of embodiment 2. Fig. 4C shows a distortion curve of the optical imaging lens group 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 group of embodiment 2, which represents a deviation of different image heights on an imaging surface after light passes through the lens. As can be seen from fig. 4A to 4D, the optical imaging lens assembly of embodiment 2 can achieve good imaging quality.
Example 3
An optical imaging lens group according to embodiment 3 of the present application is described below with reference to fig. 5 to 6D. Fig. 5 shows a schematic structural view of an optical imaging lens group according to embodiment 3 of the present application.
As shown in fig. 5, the optical imaging lens assembly, in order from an object side to an image side, comprises: a first lens E1, a stop STO, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter E7, and an image forming surface S15.
The first lens element E1 has negative power, and has a concave object-side surface S1 and a concave image-side surface S2. The second lens element E2 has positive power, and has a convex 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 negative power, and has a concave object-side surface S7 and a concave image-side surface S8. The fifth lens element E5 has positive power, and has a convex object-side surface S9 and a convex image-side surface S10. The sixth lens element E6 has negative power, and has a convex object-side surface S11 and a concave image-side surface S12. Filter E7 has an object side S13 and an image side S14. The 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 total effective focal length f of the optical imaging lens group is 2.48mm, the total length TT L of the optical imaging lens group is 5.51mm, the half ImgH of the diagonal length of the effective pixel area on the imaging surface S15 of the optical imaging lens group is 3.38mm, and the maximum field angle FOV of the optical imaging lens group is 119.1 °.
Table 5 shows a basic parameter table of the optical imaging lens group of embodiment 3, in which the units of the radius of curvature, thickness/distance, and focal length are all millimeters (mm). Tables 6-1, 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.
TABLE 5
| Flour mark | A4 | A6 | A8 | A10 | A12 | A14 | A16 |
| S1 | 2.5988E-01 | -3.1050E-01 | 5.1508E-01 | -9.4083E-01 | 1.3552E+00 | -1.3604E+00 | 8.7486E-01 |
| S2 | 4.4276E-01 | -6.9288E-01 | 4.4504E+00 | -2.4624E+01 | 9.5379E+01 | -2.3979E+02 | 3.7268E+02 |
| S3 | -2.6807E-02 | 2.1957E-01 | -5.2287E+00 | 4.1720E+01 | -2.1301E+02 | 6.8084E+02 | -1.3428E+03 |
| S4 | -2.1608E-02 | -7.0865E-03 | -6.5034E-01 | 4.1463E+00 | -1.5957E+01 | 3.5611E+01 | -4.6302E+01 |
| S5 | -7.0731E-02 | -7.3719E-02 | 3.2025E-01 | -1.7973E+00 | 5.3598E+00 | -9.7714E+00 | 1.0521E+01 |
| S6 | 9.4486E-02 | -3.3788E-01 | 9.4542E-01 | -2.2209E+00 | 3.7850E+00 | -4.3777E+00 | 3.2255E+00 |
| S7 | -7.3245E-02 | 7.9263E-02 | -1.2887E-01 | 5.3171E-01 | -1.1988E+00 | 1.4688E+00 | -1.0003E+00 |
| S8 | 1.2798E-01 | -1.0691E+00 | 2.6267E+00 | -4.6079E+00 | 5.4201E+00 | -4.0739E+00 | 1.8591E+00 |
| S9 | 3.3827E-01 | -1.1795E+00 | 2.8156E+00 | -5.0192E+00 | 6.5246E+00 | -6.1481E+00 | 3.8614E+00 |
| S10 | -2.8796E-01 | 1.5615E+00 | -4.6142E+00 | 1.0104E+01 | -1.5404E+01 | 1.6006E+01 | -1.1476E+01 |
| S11 | 1.8892E-02 | -9.4538E-01 | 2.9232E+00 | -6.0533E+00 | 9.5503E+00 | -1.1738E+01 | 1.0860E+01 |
| S12 | -4.4120E-01 | 5.4960E-01 | -4.2199E-01 | 1.2379E-01 | 8.8454E-02 | -1.2429E-01 | 7.4062E-02 |
TABLE 6-1
| Flour mark | A18 | A20 | A22 | A24 | A26 | A28 | A30 |
| S1 | -3.2128E-01 | 5.1290E-02 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S2 | -3.2612E+02 | 1.2360E+02 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S3 | 1.4973E+03 | -7.3075E+02 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S4 | 3.2693E+01 | -9.7675E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S5 | -6.1728E+00 | 1.5530E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S6 | -1.3590E+00 | 2.4967E-01 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S7 | 3.5801E-01 | -5.2834E-02 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S8 | -4.6388E-01 | 4.8083E-02 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S9 | -1.1029E+00 | -4.9931E-01 | 7.0313E-01 | -3.5460E-01 | 9.7773E-02 | -1.4536E-02 | 9.1291E-04 |
| S10 | 5.7642E+00 | -2.0434E+00 | 5.0976E-01 | -8.8007E-02 | 1.0109E-02 | -7.0595E-04 | 2.3141E-05 |
| S11 | -7.3225E+00 | 3.5329E+00 | -1.2012E+00 | 2.8072E-01 | -4.2944E-02 | 3.8771E-03 | -1.5688E-04 |
| S12 | -2.7823E-02 | 7.1431E-03 | -1.2754E-03 | 1.5614E-04 | -1.2517E-05 | 5.9198E-07 | -1.2525E-08 |
TABLE 6-2
Fig. 6A shows an on-axis chromatic aberration curve of the optical imaging lens group of embodiment 3, which represents a convergent focus deviation 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 group of embodiment 3. Fig. 6C shows a distortion curve of the optical imaging lens group 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 group of embodiment 3, which represents a deviation of different image heights on an imaging surface after light passes through the lens. As can be seen from fig. 6A to 6D, the optical imaging lens assembly according to embodiment 3 can achieve good imaging quality.
Example 4
An optical imaging lens group 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 group according to embodiment 4 of the present application.
As shown in fig. 7, the optical imaging lens assembly, in order from an object side to an image side, comprises: a first lens E1, a stop STO, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter E7, and an image forming surface S15.
The first lens element E1 has negative 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 convex 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 negative power, and has a concave object-side surface S7 and a concave image-side surface S8. The fifth lens element E5 has positive power, and has a convex object-side surface S9 and a convex image-side surface S10. The sixth lens element E6 has negative power, and has a convex object-side surface S11 and a concave image-side surface S12. Filter E7 has an object side S13 and an image side S14. The 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 total effective focal length f of the optical imaging lens group is 2.48mm, the total length TT L of the optical imaging lens group is 5.35mm, the half ImgH of the diagonal length of the effective pixel area on the imaging surface S15 of the optical imaging lens group is 3.38mm, and the maximum field angle FOV of the optical imaging lens group is 117.1 °.
Table 7 shows a basic parameter table of the optical imaging lens group of embodiment 4, in which the units of the radius of curvature, thickness/distance, and focal length are all millimeters (mm). Tables 8-1, 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.
TABLE 7
| Flour mark | A4 | A6 | A8 | A10 | A12 | A14 | A16 |
| S1 | 2.0078E-01 | -1.0912E-01 | -1.7605E-01 | 8.5590E-01 | -1.7663E+00 | 2.1339E+00 | -1.5495E+00 |
| S2 | 4.7709E-01 | -2.0348E+00 | 1.9456E+01 | -1.2409E+02 | 5.1100E+02 | -1.3402E+03 | 2.1602E+03 |
| S3 | -3.4348E-02 | 5.8326E-01 | -1.1334E+01 | 1.0001E+02 | -5.4634E+02 | 1.8442E+03 | -3.7668E+03 |
| S4 | 9.8314E-02 | -1.0983E+00 | 5.4207E+00 | -1.8253E+01 | 3.8297E+01 | -4.9868E+01 | 3.8084E+01 |
| S5 | 1.0602E-02 | -8.3995E-01 | 3.8778E+00 | -1.2359E+01 | 2.6194E+01 | -3.7216E+01 | 3.3930E+01 |
| S6 | 1.1514E-01 | -5.4065E-01 | 1.7788E+00 | -4.2254E+00 | 6.9261E+00 | -7.6287E+00 | 5.3883E+00 |
| S7 | -3.5999E-02 | -1.2875E-01 | 3.9523E-01 | -2.2974E-01 | -6.6039E-01 | 1.4807E+00 | -1.2912E+00 |
| S8 | 1.3754E-01 | -1.1994E+00 | 2.7887E+00 | -4.4937E+00 | 4.8563E+00 | -3.3321E+00 | 1.3399E+00 |
| S9 | 3.2796E-01 | -7.4073E-01 | 1.3670E-01 | 4.1031E+00 | -1.3977E+01 | 2.6218E+01 | -3.2985E+01 |
| S10 | -4.6040E-01 | 2.9272E+00 | -9.9180E+00 | 2.3175E+01 | -3.7539E+01 | 4.2834E+01 | -3.5193E+01 |
| S11 | 8.7754E-03 | -6.6525E-01 | 2.1033E+00 | -5.7817E+00 | 1.2259E+01 | -1.8114E+01 | 1.8333E+01 |
| S12 | -4.5100E-01 | 6.1641E-01 | -7.2234E-01 | 6.9239E-01 | -5.1398E-01 | 2.8145E-01 | -1.1124E-01 |
TABLE 8-1
| Flour mark | A18 | A20 | A22 | A24 | A26 | A28 | A30 |
| S1 | 6.2583E-01 | -1.0782E-01 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S2 | -1.9511E+03 | 7.5620E+02 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S3 | 4.2648E+03 | -2.0618E+03 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S4 | -1.4674E+01 | 1.7354E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S5 | -1.7866E+01 | 4.1319E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S6 | -2.2007E+00 | 3.9493E-01 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S7 | 5.4272E-01 | -9.1918E-02 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S8 | -2.6738E-01 | 1.6852E-02 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S9 | 2.9464E+01 | -1.8986E+01 | 8.7701E+00 | -2.8299E+00 | 6.0483E-01 | -7.6815E-02 | 4.3821E-03 |
| S10 | 2.1142E+01 | -9.3301E+00 | 2.9993E+00 | -6.8451E-01 | 1.0517E-01 | -9.7519E-03 | 4.1198E-04 |
| S11 | -1.2843E+01 | 6.2840E+00 | -2.1426E+00 | 4.9911E-01 | -7.5749E-02 | 6.7512E-03 | -2.6811E-04 |
| S12 | 3.1473E-02 | -6.3187E-03 | 8.8366E-04 | -8.2951E-05 | 4.8652E-06 | -1.5355E-07 | 1.7491E-09 |
TABLE 8-2
Fig. 8A shows an on-axis chromatic aberration curve of the optical imaging lens group of embodiment 4, which represents a convergent focus deviation 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 group of embodiment 4. Fig. 8C shows a distortion curve of the optical imaging lens group 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 group of embodiment 4, which represents a deviation of different image heights on the imaging surface after light passes through the lens. As can be seen from fig. 8A to 8D, the optical imaging lens assembly according to embodiment 4 can achieve good imaging quality.
Example 5
An optical imaging lens group according to embodiment 5 of the present application is described below with reference to fig. 9 to 10D. Fig. 9 shows a schematic structural view of an optical imaging lens group according to embodiment 5 of the present application.
As shown in fig. 9, the optical imaging lens assembly, in order from an object side to an image side, comprises: a first lens E1, a stop STO, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter E7, and an image forming surface S15.
The first lens element E1 has negative power, and has a concave object-side surface S1 and a concave image-side surface S2. The second lens element E2 has positive power, and has a convex 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 negative power, and has a concave object-side surface S7 and a convex image-side surface S8. The fifth lens element E5 has positive power, and has a convex object-side surface S9 and a convex image-side surface S10. The sixth lens element E6 has negative power, and has a convex object-side surface S11 and a concave image-side surface S12. Filter E7 has an object side S13 and an image side S14. The 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 total effective focal length f of the optical imaging lens group is 2.49mm, the total length TT L of the optical imaging lens group is 5.52mm, the half ImgH of the diagonal length of the effective pixel area on the imaging surface S15 of the optical imaging lens group is 3.38mm, and the maximum field angle FOV of the optical imaging lens group is 119.3 °.
Table 9 shows a basic parameter table of the optical imaging lens group of embodiment 5, in which the units of the radius of curvature, thickness/distance, and focal length are all millimeters (mm). Tables 10-1, 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.
TABLE 9
| Flour mark | A4 | A6 | A8 | A10 | A12 | A14 | A16 |
| S1 | 2.6250E-01 | -3.1225E-01 | 5.1404E-01 | -9.2348E-01 | 1.3082E+00 | -1.2978E+00 | 8.3016E-01 |
| S2 | 4.4317E-01 | -6.5884E-01 | 4.0756E+00 | -2.2106E+01 | 8.4504E+01 | -2.0997E+02 | 3.2237E+02 |
| S3 | -2.7604E-02 | 2.2300E-01 | -5.1636E+00 | 4.0340E+01 | -2.0244E+02 | 6.3826E+02 | -1.2473E+03 |
| S4 | -2.9647E-02 | 6.3687E-02 | -8.3432E-01 | 4.1768E+00 | -1.4809E+01 | 3.2264E+01 | -4.1838E+01 |
| S5 | -9.5229E-02 | 2.8707E-02 | 5.3472E-02 | -1.1726E+00 | 3.9600E+00 | -7.3107E+00 | 7.7332E+00 |
| S6 | 8.2517E-02 | -3.1120E-01 | 9.1375E-01 | -2.1156E+00 | 3.4139E+00 | -3.6666E+00 | 2.4982E+00 |
| S7 | -5.5347E-02 | 1.4388E-01 | -6.4892E-01 | 2.0448E+00 | -3.7395E+00 | 4.0740E+00 | -2.5982E+00 |
| S8 | 2.5194E-02 | -4.0502E-01 | 2.9720E-01 | 1.9174E-01 | -7.1586E-01 | 8.9357E-01 | -6.3033E-01 |
| S9 | 3.0276E-01 | -6.6328E-01 | 1.1440E+00 | -2.0695E+00 | 3.3702E+00 | -4.3171E+00 | 3.8989E+00 |
| S10 | -3.4040E-01 | 2.0749E+00 | -6.1130E+00 | 1.3123E+01 | -2.0788E+01 | 2.4032E+01 | -2.0450E+01 |
| S11 | -3.0908E-02 | -6.6239E-01 | 2.2869E+00 | -5.3405E+00 | 8.9896E+00 | -1.0958E+01 | 9.5395E+00 |
| S12 | -4.5468E-01 | 6.3088E-01 | -6.5497E-01 | 4.7753E-01 | -2.4073E-01 | 7.9497E-02 | -1.3785E-02 |
TABLE 10-1
| Flour mark | A18 | A20 | A22 | A24 | A26 | A28 | A30 |
| S1 | -3.0532E-01 | 4.9157E-02 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S2 | -2.7843E+02 | 1.0401E+02 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S3 | 1.3845E+03 | -6.7632E+02 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S4 | 2.9748E+01 | -9.0112E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S5 | -4.4378E+00 | 1.1008E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S6 | -9.7689E-01 | 1.6757E-01 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S7 | 8.9733E-01 | -1.3012E-01 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S8 | 2.4150E-01 | -3.8132E-02 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S9 | -2.2336E+00 | 6.2245E-01 | 8.8450E-02 | -1.4481E-01 | 5.4071E-02 | -9.5554E-03 | 6.8468E-04 |
| S10 | 1.2943E+01 | -6.0977E+00 | 2.1097E+00 | -5.1941E-01 | 8.5856E-02 | -8.5120E-03 | 3.8141E-04 |
| S11 | -5.8616E+00 | 2.5166E+00 | -7.4223E-01 | 1.4540E-01 | -1.7706E-02 | 1.1676E-03 | -2.9066E-05 |
| S12 | -8.1847E-04 | 1.1756E-03 | -3.3345E-04 | 5.2449E-05 | -4.9484E-06 | 2.6278E-07 | -6.0633E-09 |
TABLE 10-2
Fig. 10A shows an on-axis chromatic aberration curve of the optical imaging lens group of embodiment 5, which represents a convergent focus deviation 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 group of embodiment 5. Fig. 10C shows a distortion curve of the optical imaging lens group 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 group of embodiment 5, which represents a deviation of different image heights on an imaging surface after light passes through the lens. As can be seen from fig. 10A to 10D, the optical imaging lens assembly according to embodiment 5 can achieve good imaging quality.
Example 6
An optical imaging lens group according to embodiment 6 of the present application is described below with reference to fig. 11 to 12D. Fig. 11 shows a schematic structural view of an optical imaging lens group according to embodiment 6 of the present application.
As shown in fig. 11, the optical imaging lens assembly, in order from an object side to an image side, comprises: a first lens E1, a stop STO, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter E7, and an image forming surface S15.
The first lens element E1 has negative power, and has a concave object-side surface S1 and a concave image-side surface S2. The second lens element E2 has positive power, and has a convex 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 negative power, and has a concave object-side surface S7 and a convex image-side surface S8. The fifth lens element E5 has positive power, and has a concave object-side surface S9 and a convex image-side surface S10. The sixth lens element E6 has negative power, and has a convex object-side surface S11 and a concave image-side surface S12. Filter E7 has an object side S13 and an image side S14. The 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 total effective focal length f of the optical imaging lens group is 2.48mm, the total length TT L of the optical imaging lens group is 5.51mm, the half ImgH of the diagonal length of the effective pixel area on the imaging surface S15 of the optical imaging lens group is 3.38mm, and the maximum field angle FOV of the optical imaging lens group is 119.4 °.
Table 11 shows a basic parameter table of the optical imaging lens group of example 6, in which the units of the radius of curvature, thickness/distance, and focal length are all millimeters (mm). Tables 12-1, 12-2 show the high-order term coefficients that can be used for each aspherical mirror surface in example 6, wherein each aspherical mirror surface type can be defined by the formula (1) given in example 1 above.
TABLE 11
TABLE 12-1
| Flour mark | A18 | A20 | A22 | A24 | A26 | A28 | A30 |
| S1 | -1.7259E-01 | 3.1695E-02 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S2 | -2.3613E+02 | 9.5189E+01 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S3 | 3.4062E+03 | -1.7284E+03 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S4 | 1.5960E+01 | -4.8197E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S5 | 7.1901E-01 | -1.2479E-01 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S6 | -1.4646E+00 | 2.5091E-01 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S7 | 1.0336E+00 | -1.4363E-01 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S8 | 3.1484E-01 | -4.2313E-02 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S9 | 1.3785E+01 | -8.1831E+00 | 3.0981E+00 | -6.3648E-01 | 2.3307E-02 | 1.6280E-02 | -2.3312E-03 |
| S10 | 3.6583E+01 | -1.9171E+01 | 7.2892E+00 | -1.9529E+00 | 3.4874E-01 | -3.7176E-02 | 1.7865E-03 |
| S11 | -6.6678E+00 | 3.0190E+00 | -9.7072E-01 | 2.1533E-01 | -3.1295E-02 | 2.6826E-03 | -1.0292E-04 |
| S12 | -9.7563E-04 | 1.7793E-03 | -5.0065E-04 | 7.7469E-05 | -7.1924E-06 | 3.7665E-07 | -8.5929E-09 |
TABLE 12-2
Fig. 12A shows an on-axis chromatic aberration curve of the optical imaging lens group of embodiment 6, which represents a convergent focus deviation of light rays of different wavelengths after passing through the lens. Fig. 12B shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the optical imaging lens group of embodiment 6. Fig. 12C shows a distortion curve of the optical imaging lens group of embodiment 6, which represents distortion magnitude values corresponding to different angles of view. Fig. 12D shows a chromatic aberration of magnification curve of the optical imaging lens group of embodiment 6, which represents a deviation of different image heights on an imaging surface after light passes through the lens. As can be seen from fig. 12A to 12D, the optical imaging lens group according to embodiment 6 can achieve good imaging quality.
In summary, examples 1 to 6 each satisfy the relationship shown in table 13.
Watch 13
The present application also provides an imaging device whose electron photosensitive element may be a photo-coupled device (CCD) or a complementary metal oxide semiconductor device (CMOS). The imaging device may be a stand-alone imaging device such as a digital camera, or may be an imaging module integrated on a mobile electronic device such as a mobile phone. The imaging device is equipped with the optical imaging lens group described above.
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 those skilled in the art that the scope of the invention herein disclosed is not limited to the particular combination of features described above, but also encompasses other arrangements formed by any combination of the above 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. The optical imaging lens assembly, in order from an object side to an image side along an optical axis, comprises:
a first lens having a negative optical power;
the image side surface of the second lens is a convex surface;
a third lens having a refractive power, an object-side surface of which is convex;
a fourth lens having a negative optical power;
a fifth lens having optical power; and
a sixth lens having a refractive power, an object-side surface of which is convex;
the maximum field angle FOV of the optical imaging lens group and the distance TT L between the object side surface of the first lens and the imaging surface of the optical imaging lens group on the optical axis satisfy 2.5mm-1＜10×tan(FOV/2)/TTL＜4mm-1(ii) a And
the maximum effective radius DT11 of the object side surface of the first lens and the maximum effective radius DT61 of the object side surface of the sixth lens meet the following conditions: 0.5 < DT11/DT61 < 1.
2. The optical imaging lens group of claim 1 wherein the radius of curvature R11 of the object side surface of the sixth lens and the total effective focal length f of the optical imaging lens group satisfy: 0 < R11/f < 1.
3. The optical imaging lens group of claim 1, wherein a distance TT L from the object side surface of the first lens to the imaging surface of the optical imaging lens group on the optical axis and a half of a diagonal length ImgH of an effective pixel area of the optical imaging lens group satisfy TT L/ImgH < 1.8.
4. The optical imaging lens group of claim 1, wherein the effective focal length f1 of the first lens and the effective focal length f4 of the fourth lens satisfy: 0 < f1/f4 < 1.
5. The optical imaging lens group of claim 1, wherein the effective focal length f3 of the third lens and the effective focal length f4 of the fourth lens satisfy: f3/f4 > 0.
6. The optical imaging lens group of claim 1, wherein a separation distance T12 on the optical axis of the first lens and the second lens, a separation distance T23 on the optical axis of the second lens and the third lens, a separation distance T34 on the optical axis of the third lens and the fourth lens, a separation distance T45 on the optical axis of the fourth lens and the fifth lens, and a separation distance T56 on the optical axis of the fifth lens and the sixth lens satisfy: 0 < T12/(T23+ T34+ T45+ T56) < 1.5.
7. The optical imaging lens group of claim 1 wherein the central thickness CT3 of the third lens on the optical axis is separated from the third and fourth lenses on the optical axis by a distance T34 that satisfies: CT3/T34 < 1.5.
8. The optical imaging lens group of claim 1 wherein the distance SAG11 on the optical axis from the intersection of the object-side surface of the first lens and the optical axis to the effective radius vertex of the object-side surface of the first lens and the central thickness CT1 of the first lens satisfy: 0 < SAG11/CT1 < 1.
9. The optical imaging lens group of claim 1 wherein the radius of curvature of the object-side surface of the third lens, R5, and the radius of curvature of the image-side surface of the second lens, R4, satisfy: -5 < R5/R4 < 0.
10. The optical imaging lens assembly, in order from an object side to an image side along an optical axis, comprises:
a first lens having an optical power;
the image side surface of the second lens is a convex surface;
a third lens with negative focal power, wherein the object side surface of the third lens is a convex surface;
a fourth lens having an optical power;
a fifth lens having optical power; and
a sixth lens having a refractive power, an object-side surface of which is convex;
the edge thickness ET3 of the third lens and the center thickness CT3 of the third lens satisfy: 1.5 < ET3/CT3 < 2.5; and
the maximum effective radius DT11 of the object side surface of the first lens and the maximum effective radius DT61 of the object side surface of the sixth lens meet the following conditions: 0.5 < DT11/DT61 < 1.
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