CN113985577A - Optical imaging lens - Google Patents

Optical imaging lens Download PDF

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Publication number
CN113985577A
CN113985577A CN202111307318.0A CN202111307318A CN113985577A CN 113985577 A CN113985577 A CN 113985577A CN 202111307318 A CN202111307318 A CN 202111307318A CN 113985577 A CN113985577 A CN 113985577A
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lens
optical imaging
image
optical
imaging lens
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CN202111307318.0A
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CN113985577B (en
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肖亮
戴付建
赵烈烽
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Zhejiang Sunny Optics Co Ltd
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Zhejiang Sunny Optics Co Ltd
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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
    • G02B13/0015—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design
    • G02B13/002—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface
    • G02B13/0045—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface having five or more lenses
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B30/00—Camera modules comprising integrated lens units and imaging units, specially adapted for being embedded in other devices, e.g. mobile phones or vehicles

Abstract

An optical imaging lens includes, in order from an object side to an image side along an optical axis, a first lens having positive power, a second lens having negative power, a third lens having negative power, a fourth lens having negative power, a fifth lens having negative power, a sixth lens having negative power, a seventh lens having negative power, an eighth lens having negative power, and a ninth lens having negative power; the first lens is made of glass; the image side surface of the fifth lens is a concave surface; the object side surface of the seventh lens is a concave surface, and the image side surface of the seventh lens is a convex surface; and the radius of curvature R15 of the object-side surface of the eighth lens, the radius of curvature R16 of the image-side surface of the eighth lens, and the focal length f8 of the eighth lens satisfy: f8/(R15+ R16) < 1.7.

Description

Optical imaging lens
Technical Field
The application relates to the field of optical elements, in particular to an optical imaging lens.
Background
With the rapid development of miniaturized electronic products such as smart phones, the optical imaging lens mounted on the smart phone is continuously upgraded. Each chip factory is actively laying out 1-inch chips, and the Fno of the traditional mobile phone imaging lens is 2.0 or more than 2.0, so that the traditional mobile phone imaging lens cannot meet higher imaging requirements. In addition, the structure of the lens with seven or less lenses is not enough to effectively deal with the challenge of a large aperture, and the optical imaging lens with eight or nine lenses will gradually become the mainstream. Therefore, in order to comply with the market demand, it is necessary to design an optical imaging lens having various requirements of miniaturization, large image plane, and high quality.
Disclosure of Invention
An optical imaging lens includes, in order from an object side to an image side along an optical axis, a first lens having positive power, a second lens having negative power, a third lens having negative power, a fourth lens having power, a fifth lens having negative power, a sixth lens having negative power, a seventh lens having power, an eighth lens having power, and a ninth lens having power; wherein, the first lens is made of glass; the image side surface of the fifth lens is a concave surface; the object side surface of the seventh lens is a concave surface, and the image side surface of the seventh lens is a convex surface; and the curvature radius R15 of the object side surface of the eighth lens, the curvature radius R16 of the image side surface of the eighth lens and the focal length f8 of the eighth lens satisfy: f8/(R15+ R16) < 1.7.
In one embodiment, an optical imaging lens according to the present application further includes a stop disposed between the second lens and the third lens.
In one embodiment, ImgH, which is half the diagonal length of the effective pixel area on the imaging plane, and TTL, which is the on-axis distance from the object side surface of the first lens to the imaging plane, satisfy: TTL/ImgH is less than or equal to 1.3.
In one embodiment, the focal length f of the optical imaging lens and the entrance pupil diameter EPD of the optical imaging lens satisfy: f/EPD is less than or equal to 1.5.
In one embodiment, half of the Semi-FOV of the maximum field angle of the optical imaging lens satisfies: Semi-FOV > 40.
In one embodiment, ImgH, which is half the diagonal length of the effective pixel area on the imaging plane, satisfies: ImgH > 8.0 mm.
In one embodiment, the optical imaging lens further includes a stop, and a sum Σ AT of an on-axis distance SL from the stop to the imaging surface and an air space on the optical axis between any adjacent two lenses having optical powers of the first lens to the ninth lens satisfies: 2.0 < SL/∑ AT < 2.5.
In one embodiment, the radius of curvature R7 of the object-side surface of the fourth lens, the radius of curvature R8 of the image-side surface of the fourth lens, and the focal length f4 of the fourth lens satisfy: 1.0 < (R7+ R8)/f4 < 2.0.
In one embodiment, a radius of curvature R17 of the object-side surface of the ninth lens and a radius of curvature R18 of the image-side surface of the ninth lens satisfy: 13.5 < R17/R18 < -9.0.
In one embodiment, an on-axis distance SAG71 between an intersection point of an object-side surface of the seventh lens and the optical axis to an effective radius vertex of the object-side surface of the seventh lens and an on-axis distance SAG72 between an intersection point of an image-side surface of the seventh lens and the optical axis to an effective radius vertex of the image-side surface of the seventh lens satisfy: -6.0 < (SAG71+ SAG72)/(SAG71-SAG72) < -4.0.
In one embodiment, an on-axis distance SAG52 between an intersection point of an image-side surface of the fifth lens and the optical axis to an effective radius vertex of the image-side surface of the fifth lens and an on-axis distance SAG62 between an intersection point of an image-side surface of the sixth lens and the optical axis to an effective radius vertex of the image-side surface of the sixth lens satisfy: 2.0 < SAG52/SAG62 < 4.5.
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: 1.5 < CT5/ET 5< 3.5.
In one embodiment, an on-axis distance SAG91 between an intersection of an object-side surface of the ninth lens and the optical axis to an effective radius vertex of the object-side surface of the ninth lens and an on-axis distance SAG92 between an intersection of an image-side surface of the ninth lens and the optical axis to an effective radius vertex of the image-side surface of the ninth lens satisfy: 1.0 < SAG91/SAG92 < 2.0.
In one embodiment, an air interval T67 of the sixth lens and the seventh lens on the optical axis and an air interval T89 of the eighth lens and the ninth lens on the optical axis satisfy: 2.0 < T89/T67 < 3.5.
In one embodiment, the abbe number V1 of the first lens and the abbe number V2 of the second lens satisfy: V1-V2< 27.
In one embodiment, the abbe number V5 of the fifth lens and the abbe number V4 of the fourth lens satisfy: V4-V5< 19.
This application adopts nine lenses, through the focal power of rational distribution each lens, face type, each lens's central thickness and each epaxial interval between the lens etc for above-mentioned optical imaging lens has big image plane, at least one beneficial effect such as 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 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 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 nine lenses having optical powers, which are a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens, and a ninth lens, respectively. The nine lenses are arranged along the optical axis in order from the object side to the image side. Any adjacent two lenses of the first lens to the ninth lens may have a spacing distance therebetween.
In an exemplary embodiment, the first lens may have a positive optical power and be made of a glass material; the second lens may have a positive or negative optical power; the third lens may have a negative optical power; the fourth lens may have a positive power or a negative power; the fifth lens can have negative focal power, and the image side surface of the fifth lens is a concave surface; the sixth lens may have a negative optical power; the seventh lens can have positive focal power or negative focal power, and the object side surface of the seventh lens is a concave surface, and the image side surface of the seventh lens is a convex surface; the eighth lens may have a positive or negative optical power and the ninth lens may have a positive or negative optical power. The optical power and materials of each lens are reasonably matched, so that the temperature drift of the lens can be controlled within a reasonable range, the sensitivity of the optical imaging lens can be adjusted, and the production yield of the lens can be improved.
In an exemplary embodiment, a curvature radius R15 of an object side surface of an eighth lens, a curvature radius R16 of an image side surface of the eighth lens, and a focal length f8 of the eighth lens of the optical imaging lens according to the present application satisfy: f8/(R15+ R16) < 1.7. The curvature radius of the object side surface of the eighth lens and the curvature radius of the image side surface of the eighth lens are restricted within a certain range, so that the optical distortion can be reduced, better imaging quality is ensured, the incident angle of the light rays of the off-axis field of view on an imaging surface can be controlled, and the matching performance with the photosensitive element and the band-pass filter is improved.
In an exemplary embodiment, an optical imaging lens according to the present application further includes a stop disposed between the second lens and the third lens.
In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: TTL/ImgH is less than or equal to 1.3, wherein ImgH is half of the diagonal length of an effective pixel area on an imaging surface, and TTL is the on-axis distance from the object side surface of the first lens to the imaging surface. The TTL/ImgH is less than or equal to 1.3, the optical total length of the whole optical imaging lens is favorably limited to a certain size, and the optical imaging lens has the ultrathin characteristic.
The optical imaging lens according to the present application can have a smaller total optical length with a large image plane, for example, TTL can satisfy 10.79mm < TTL <10.92 mm.
In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: f/EPD is less than or equal to 1.5, wherein f is the focal length of the optical imaging lens, and EPD is the entrance pupil diameter of the optical imaging lens. The f/EPD is less than or equal to 1.5, so that the optical imaging lens has a larger aperture, the light incoming amount of the optical imaging lens is improved, and the use requirement of a dark environment is met.
In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: the Semi-FOV is more than 40 degrees, wherein the Semi-FOV is half of the maximum field angle of the optical imaging lens. More specifically, the Semi-FOV further satisfies: Semi-FOV > 44. The Semi-FOV is more than 40 degrees, the optical imaging lens is ensured to obtain a wider imaging range, and the angle of the field of view is more than 80 degrees.
In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: ImgH > 8.0mm, where ImgH is half the diagonal length of the effective pixel area on the imaging plane. More specifically, ImgH further satisfies: ImgH > 8.3 mm. The ImgH is more than 8.0mm, and the optical imaging lens is favorably ensured to have a larger imaging range.
In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 2.0 < SL/∑ AT < 2.5, where SL is the on-axis distance from the diaphragm to the image plane, and Σ AT is the sum of the air spaces on the optical axis between any adjacent two lenses having power among the first lens to the ninth lens. More specifically, SL and sigma AT may further satisfy 2.13 < SL/sigma AT < 2.26. The requirement that SL/sigma AT is more than 2.0 and less than 2.5 is met, the ratio of SL to sigma AT is favorably and reasonably controlled, the compact feeling of the lens is ensured, and the ultrathin effect of the lens is also realized under the condition that the lens has a large aperture.
In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 1.0 < (R7+ R8)/f4 < 2.0, wherein R7 is the radius of curvature of the object-side surface of the fourth lens, R8 is the radius of curvature of the image-side surface of the fourth lens, and f4 is the focal length of the fourth lens. More specifically, R7, R8, and f4 may further satisfy: 1.40 < (R7+ R8)/f4 < 1.76. The requirement that 1.0 < (R7+ R8)/f4 is less than 2.0 is met, the curvature radii of the object side surface of the fourth lens and the image side surface of the fourth lens are restrained within a certain range, the optical distortion is reduced, and good imaging quality is ensured.
In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: -13.5 < R17/R18 < -9.0, wherein R17 is the radius of curvature of the object-side surface of the ninth lens and R18 is the radius of curvature of the image-side surface of the ninth lens. More specifically, R17 and R18 may further satisfy: 13.36 < R17/R18 < -9.22. The optical imaging lens meets the requirement that R17/R18 is less than-9.0 and is more than-13.5, and the axial aberration generated by the optical imaging lens is effectively balanced by reasonably controlling the curvature radius of the object side surface of the ninth lens and the curvature radius of the image side surface of the ninth lens to be in a certain interval.
In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: -6.0 < (SAG71+ SAG72)/(SAG71-SAG72) < -4.0, wherein SAG71 is an on-axis distance between an intersection of an object-side surface of the seventh lens and the optical axis to an effective radius vertex of the object-side surface of the seventh lens, and SAG72 is an on-axis distance between an intersection of an image-side surface of the seventh lens and the optical axis to an effective radius vertex of the image-side surface of the seventh lens. More specifically, SAG71 and SAG72 further may satisfy: -6.0 < (SAG71+ SAG72)/(SAG71-SAG72) < -4.0. Satisfying-5.53 < (SAG71+ SAG72)/(SAG71-SAG72) < -4.76 is advantageous for making the degree of freedom of variation of the seventh lens surface higher, thereby enabling the optical imaging lens to obtain a stronger ability to correct astigmatism and curvature of field.
In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 2.0 < SAG52/SAG62 < 4.5, wherein SAG52 is an on-axis distance from an intersection point of an image side surface of the fifth lens and the optical axis to an effective radius vertex of the image side surface of the fifth lens, and SAG62 is an on-axis distance from an intersection point of an image side surface of the sixth lens and the optical axis to an effective radius vertex of the image side surface of the sixth lens. More specifically, SAG52 and SAG62 further may satisfy: 2.0 < SAG52/SAG62 < 4.5. The requirement that 2.02 < SAG52/SAG62 < 4.11 is met is favorable for ensuring that the chief ray of the optical imaging system has a smaller incident angle and higher relative illumination when being incident on an image surface by reasonably controlling the ratio range of SAG52 and SAG61, and is also favorable for ensuring that the fifth lens and the sixth lens have better processability.
In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 1.5 < CT5/ET 5< 3.5, wherein CT5 is the central thickness of the fifth lens on the optical axis and ET5 is the edge thickness of the fifth lens. More specifically, CT5 and ET5 further satisfy 1.95 < CT5/ET 5< 3.48. The requirement that the ratio range of CT5/ET5 is more than 1.5 and less than 3.5 is met, the processing difficulty of the lens is controlled by reasonably restricting the ratio range of CT5 and ET5, the angle between the principal ray incident on the image plane and the optical axis is reduced, and the relative illumination of the image plane is improved.
In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 1.0 < SAG91/SAG92 < 2.0, wherein SAG91 is an on-axis distance between an intersection point of an object-side surface of the ninth lens and the optical axis to an effective radius vertex of the object-side surface of the ninth lens, and SAG92 is an on-axis distance between an intersection point of an image-side surface of the ninth lens and the optical axis to an effective radius vertex of the image-side surface of the ninth lens. The SAG91/SAG92 is more than 1.0 and less than 2.0, the SAG91/SAG92 is reasonably controlled within a certain range to adjust the chief ray angle of the optical imaging lens, the relative brightness of the optical imaging lens group is improved, and the image plane definition is improved.
In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 2.0 < T89/T67 < 3.5, wherein T67 is an air space on the optical axis of the sixth lens and the seventh lens, and T89 is an air space on the optical axis of the eighth lens and the ninth lens. More specifically, T89 and T67 may further satisfy 2.24 < T89/T67 < 2.64. The requirement that T89/T67 is more than 2.0 and less than 3.5 is met, and the air space of the sixth lens and the seventh lens on the optical axis and the air space of the eighth lens and the ninth lens on the optical axis are restrained, so that the field curvature generated by the front lens and the field curvature generated by the rear lens of the optical imaging lens are balanced, and the optical imaging lens has reasonable field curvature.
In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: V1-V2<27, where V1 is the abbe number of the first lens and V2 is the abbe number of the second lens. More specifically, V1 and V2 may further satisfy V1-V2< 26.4. The optical imaging lens meets the requirement that V1-V2 is less than 27, and is beneficial to strongly correcting the vertical axis chromatic aberration, the axial chromatic aberration and the chromatic spherical aberration of the system by controlling the Abbe numbers of the first lens and the second lens, so that the image quality of the optical imaging lens is better ensured.
In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: V4-V5<19, where V5 is the Abbe number of the fifth lens and V4 is the Abbe number of the fourth lens. More specifically, V4 and V5 may further satisfy V4-V5< 18.8. The optical lens meets the requirement that V4-V5 is less than 19, is beneficial to reasonably distributing the curvature radius of the fourth lens and the Abbe number of the fifth lens, is beneficial to reducing the chromatic dispersion of the system, and ensures a better imaging effect.
In an exemplary embodiment, the focal length f of the optical imaging lens may be, for example, in the range of 8.01mm to 8.23mm, the focal length f1 of the first lens may be, for example, in the range of 7.74mm to 7.98mm, the focal length f2 of the second lens may be, for example, in the range of-14.06 mm to-13.39 mm, the focal length f3 of the third lens may be, for example, in the range of-67.59 mm to-59.66 mm, the focal length f4 of the fourth lens may be, for example, in the range of 13.59mm to 13.98mm, the focal length f5 of the fifth lens may be, for example, in the range of-8402.13 mm to-163.76 mm, the focal length f6 of the sixth lens may be, for example, in the range of-442.41 mm to-93.67 mm, the focal length f7 of the seventh lens may be, for example, in the range of-81.06 mm to-69.69 mm, the focal length f8 of the eighth lens may be, for example, in the range of 11.12 mm to-18.84 mm, and nine mm.
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 characteristics of large image surface, high pixel, miniaturization, high imaging quality and the like. The optical imaging lens according to the above-described embodiment of the present application may employ a plurality of lenses, for example, the above nine lenses. By reasonably distributing the focal power and the surface shape of each lens, the central thickness of each lens, the on-axis 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 is more beneficial to production and processing.
In the embodiment of the present application, at least one of the mirror surfaces of each of the first to ninth 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 ninth 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 nine lenses are exemplified in the embodiment, the optical imaging lens is not limited to include nine 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 first lens E1, a second lens E2, a stop STO, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, a ninth lens E9, a filter E10, and an image plane S21.
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 convex object-side surface S3 and a concave 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. The sixth lens element E6 has negative power, and has a convex object-side surface S11 and a concave image-side surface S12. The seventh lens element E7 has negative power, and has a concave object-side surface S13 and a convex image-side surface S14. The eighth lens element E8 has positive power, and has a convex object-side surface S15 and a concave image-side surface S16. The ninth lens element E9 has negative power, and has a concave object-side surface S17 and a concave image-side surface S18. Filter E10 has an object side S19 and an image side S20. The light from the object sequentially passes through the respective surfaces S1 to S20 and is finally imaged on the imaging surface S21.
Table 1 shows a basic parameter table of the optical imaging lens of embodiment 1, in which the radius of curvature and the thickness are both in millimeters (mm).
Figure BDA0003340737400000071
Figure BDA0003340737400000081
TABLE 1
In the present example, the focal length f of the optical imaging lens is 8.11mm, the focal length f1 of the first lens is 7.89mm, the focal length f2 of the second lens is-13.81 mm, the focal length f3 of the third lens is-60.22 mm, the focal length f4 of the fourth lens is 13.67mm, the focal length f5 of the fifth lens is-163.77 mm, the focal length f6 of the sixth lens is-442.40 mm, the focal length f7 of the seventh lens is-69.70 mm, the focal length f8 of the eighth lens is 11.79mm, the focal length f9 of the ninth lens is-7.86 mm, the on-axis distance TTL of the object side surface of the first lens to the imaging surface (i.e., the distance on the optical axis from the object side surface S1 of the first lens E1 to the imaging surface S21 of the optical imaging lens) is 10.80mm, the diagonal half of the maximum imaging angle of the optical field of the optical imaging lens S21 is immi h 8.40 mm.
In embodiment 1, the object-side surface and the image-side surface of any one of the first lens E1 to the ninth lens E9 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 BDA0003340737400000082
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 S18 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 BDA0003340737400000083
Figure BDA0003340737400000091
TABLE 2-1
Flour mark A18 A20 A22 A24 A26 A28 A30
S1 -1.2976E-05 -1.3640E-05 -4.1661E-06 -3.9447E-06 -1.5002E-06 -4.3663E-06 -2.1075E-06
S2 -5.2324E-05 2.3960E-05 -1.3587E-05 7.2412E-06 -3.6902E-06 3.2761E-06 -1.5906E-06
S3 -8.9644E-05 1.3844E-05 -2.4311E-05 2.7145E-06 -6.7716E-06 2.4220E-06 -4.6413E-07
S4 -1.0647E-04 -4.1630E-05 -2.8760E-05 -1.0610E-05 -1.0417E-05 -6.5550E-06 -6.1342E-06
S5 -5.1286E-05 -2.9611E-05 -1.0050E-05 -4.7073E-06 2.2855E-06 1.4368E-06 3.3249E-06
S6 2.1795E-05 5.2257E-06 -2.9955E-06 -3.5812E-06 2.3370E-06 3.2330E-06 3.1987E-07
S7 1.0807E-04 4.4881E-05 1.5144E-05 -2.4339E-06 -5.6081E-07 3.0821E-07 2.2577E-06
S8 1.1166E-04 8.0570E-05 -4.0973E-05 -5.2521E-06 -2.4314E-05 -3.6194E-06 -6.9562E-07
S9 -5.5780E-05 6.8821E-05 -6.6605E-05 4.1578E-05 -9.0886E-06 1.1108E-05 -3.1150E-06
S10 -3.9077E-04 -5.4703E-05 -1.0754E-04 -9.8746E-06 -5.7858E-06 5.7965E-06 4.1177E-06
S11 -5.9644E-05 3.7940E-04 3.9581E-05 4.7874E-05 -1.9377E-05 7.1638E-07 -8.1680E-06
S12 -1.2958E-04 6.0091E-04 -2.2716E-05 2.3123E-05 -5.9596E-05 -2.0898E-06 -1.2929E-05
S13 4.0513E-04 -9.2356E-05 -7.6689E-04 -3.9494E-04 -3.2321E-04 -8.8521E-05 -6.1842E-06
S14 -3.5288E-03 -2.3588E-03 -1.2107E-04 1.3738E-04 3.2624E-05 1.0391E-05 7.7897E-05
S15 7.7799E-03 -4.0194E-04 -1.7259E-03 -1.7259E-03 -1.6760E-04 1.2653E-04 1.9346E-04
S16 7.8663E-05 1.5391E-03 2.6364E-04 9.7153E-05 -1.7651E-04 -3.0386E-05 -2.2463E-05
S17 1.8480E-03 -3.5460E-03 2.4730E-03 -1.1265E-03 4.2634E-04 -1.4401E-04 2.6862E-05
S18 1.1928E-02 -3.5001E-03 2.7707E-03 -9.9093E-04 5.0575E-04 -6.8360E-04 2.1982E-04
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 image heights. 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 first lens E1, a second lens E2, a stop STO, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, a ninth lens E9, a filter E10, and an image plane S21.
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 convex object-side surface S3 and a concave 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. The sixth lens element E6 has negative power, and has a convex object-side surface S11 and a concave image-side surface S12. The seventh lens element E7 has negative power, and has a concave object-side surface S13 and a convex image-side surface S14. The eighth lens element E8 has positive power, and has a convex object-side surface S15 and a concave image-side surface S16. The ninth lens element E9 has negative power, and has a concave object-side surface S17 and a concave image-side surface S18. Filter E10 has an object side S19 and an image side S20. The light from the object sequentially passes through the respective surfaces S1 to S20 and is finally imaged on the imaging surface S21.
In the present example, the focal length f of the optical imaging lens is 8.14mm, the focal length f1 of the first lens is 7.78mm, the focal length f2 of the second lens is-13.46 mm, the focal length f3 of the third lens is-59.67 mm, the focal length f4 of the fourth lens is 13.60mm, the focal length f5 of the fifth lens is-255.78 mm, the focal length f6 of the sixth lens is-179.28 mm, the focal length f7 of the seventh lens is-72.27 mm, the focal length f8 of the eighth lens is 11.97mm, the focal length f9 of the ninth lens is-7.84 mm, the on-axis distance TTL from the object side surface of the first lens to the imaging plane (i.e., the distance on the optical axis from the object side surface S1 of the first lens E1 to the imaging plane S21 of the optical imaging lens) is 10.82mm, the diagonal length of the effective pixel area on the imaging plane S21 of the optical imaging lens is half of ImgH 8.40mm, and half of the maximum imaging angle of the optical imaging lens is-half of imh.
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 BDA0003340737400000101
Figure BDA0003340737400000111
TABLE 3
Flour mark A4 A6 A8 A10 A12 A14 A16
S1 1.0522E-02 2.4409E-03 -7.4935E-04 -6.4594E-04 -3.3275E-04 -1.1759E-04 -3.3520E-05
S2 7.8756E-02 -1.2028E-02 2.6554E-03 -8.1291E-04 1.4516E-04 -1.0819E-04 7.2307E-05
S3 9.8122E-02 -1.6980E-02 4.8140E-03 -7.5154E-04 1.8320E-04 -1.6439E-04 7.3535E-05
S4 1.8578E-02 -8.1897E-03 -6.9211E-04 -7.7220E-04 -3.1466E-04 -2.2366E-04 -7.2194E-05
S5 -2.8101E-01 1.8087E-02 4.8022E-04 -1.0418E-03 -4.2249E-04 -9.0991E-05 -4.9120E-05
S6 -2.7679E-01 3.6993E-02 3.6148E-03 -1.8799E-03 -4.9238E-04 5.4990E-05 7.5169E-06
S7 -1.9554E-01 -3.7253E-02 -4.9269E-03 -2.2373E-03 -3.9384E-04 1.6077E-04 7.7678E-05
S8 -4.2527E-01 -4.4147E-04 -9.9663E-03 3.5023E-03 -3.3666E-04 9.7706E-04 2.6965E-04
S9 -5.5006E-01 1.5328E-01 -2.8349E-03 -5.8787E-04 -2.8044E-03 6.5031E-04 -2.9300E-04
S10 -6.8582E-01 -6.9129E-03 7.5630E-03 7.1467E-04 1.2844E-03 -1.7106E-04 -5.6543E-05
S11 -6.1320E-01 -6.5192E-02 2.4729E-02 -4.6140E-04 -7.4391E-04 -2.5573E-03 6.6003E-04
S12 -5.0212E-01 -1.4538E-02 3.7770E-02 -8.9097E-03 8.8073E-04 -2.8649E-03 2.0073E-03
S13 4.4700E-02 -2.4801E-01 6.1539E-02 -4.0522E-02 1.1194E-02 4.4716E-03 7.3699E-03
S14 -7.3916E-01 2.0485E-01 -9.4491E-03 -1.5883E-02 8.9601E-04 1.5426E-02 2.2303E-03
S15 -4.9092E+00 4.1230E-01 6.7147E-02 2.8048E-02 -3.4279E-02 6.7295E-04 3.2901E-03
S16 -4.4726E+00 2.9539E-01 5.5548E-02 -7.0316E-02 1.2603E-02 -6.8972E-03 4.9569E-03
S17 -1.6897E+00 1.3171E+00 -6.4104E-01 3.1387E-01 -1.3292E-01 3.6735E-02 -3.7909E-03
S18 -7.5500E+00 1.9537E+00 -5.0514E-01 2.4289E-01 -9.6856E-02 2.5921E-02 -2.5657E-02
TABLE 4-1
Figure BDA0003340737400000112
Figure BDA0003340737400000121
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 a chromatic aberration of magnification curve of the optical imaging lens of embodiment 2, which represents a deviation of different image heights on the imaging plane after light passes through the lens. Fig. 4C shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the optical imaging lens of embodiment 2. Fig. 4D shows a distortion curve of the optical imaging lens of embodiment 2, which represents distortion magnitude values corresponding to different image heights. 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 first lens E1, a second lens E2, a stop STO, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, a ninth lens E9, a filter E10, and an image plane S21.
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 convex object-side surface S3 and a concave 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. The sixth lens element E6 has negative power, and has a convex object-side surface S11 and a concave image-side surface S12. The seventh lens element E7 has negative power, and has a concave object-side surface S13 and a convex image-side surface S14. The eighth lens element E8 has positive power, and has a convex object-side surface S15 and a concave image-side surface S16. The ninth lens element E9 has negative power, and has a concave object-side surface S17 and a concave image-side surface S18. Filter E10 has an object side S19 and an image side S20. The light from the object sequentially passes through the respective surfaces S1 to S20 and is finally imaged on the imaging surface S21.
In the present example, the focal length f of the optical imaging lens is 8.07mm, the focal length f1 of the first lens is 7.95mm, the focal length f2 of the second lens is-14.00 mm, the focal length f3 of the third lens is-65.94 mm, the focal length f4 of the fourth lens is 13.91mm, the focal length f5 of the fifth lens is-398.85 mm, the focal length f6 of the sixth lens is-121.53 mm, the focal length f7 of the seventh lens is-81.05 mm, the focal length f8 of the eighth lens is 12.17mm, the focal length f9 of the ninth lens is-7.86 mm, the on-axis distance TTL of the object side surface of the first lens to the imaging surface (i.e., the distance on the optical axis from the object side surface S1 of the first lens E1 to the imaging surface S21 of the optical imaging lens) is 10.87mm, the diagonal half of the maximum imaging angle of the optical field of the optical imaging lens S21 is imgih 8.40 mm.
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 BDA0003340737400000131
TABLE 5
Figure BDA0003340737400000132
Figure BDA0003340737400000141
TABLE 6-1
Flour mark A18 A20 A22 A24 A26 A28 A30
S1 -6.0719E-06 -2.6160E-06 1.1798E-06 1.3000E-06 2.5902E-06 -7.8777E-08 -2.4959E-06
S2 -4.7421E-05 2.3672E-05 -1.2345E-05 5.5741E-06 -4.3655E-06 3.1793E-06 -9.1274E-07
S3 -6.0721E-05 2.6352E-05 -1.4095E-05 5.5385E-06 -6.5060E-06 1.7390E-06 1.7483E-07
S4 -2.2757E-05 -2.1659E-07 -6.1971E-06 1.1687E-06 6.2621E-08 2.1633E-06 -1.4795E-06
S5 -1.0586E-06 -4.6215E-06 1.7954E-06 -1.3650E-06 1.0067E-06 -2.1060E-06 1.0326E-06
S6 7.2052E-06 2.8630E-06 2.5771E-06 -1.6369E-06 6.6566E-07 3.5824E-07 -1.0811E-07
S7 7.4856E-06 4.8641E-06 7.1139E-06 -2.1573E-06 8.9487E-08 -5.5957E-09 2.9368E-06
S8 1.4453E-05 6.3204E-05 -7.5634E-06 1.7921E-05 -5.0741E-06 -8.2513E-07 2.5441E-07
S9 2.3971E-05 9.7063E-05 -8.1262E-05 2.5089E-05 -1.6939E-05 9.9267E-06 -2.0298E-06
S10 -1.2141E-04 1.0670E-04 -4.5524E-05 7.6807E-06 -1.2339E-05 -2.7462E-06 -1.6704E-06
S11 -5.6646E-05 3.1698E-04 -2.9582E-05 4.1770E-06 -2.5204E-05 9.9498E-06 -8.3643E-07
S12 -1.4188E-04 4.8112E-04 -1.0793E-04 3.4754E-05 -3.2341E-05 1.6823E-05 -1.0316E-05
S13 6.8847E-04 2.8949E-04 -5.5217E-04 -1.7268E-04 -1.7661E-04 -1.9145E-05 6.2977E-06
S14 -3.0745E-03 -2.4693E-03 -2.5099E-04 4.7873E-04 1.7968E-04 -8.5029E-06 -1.4226E-05
S15 4.6074E-03 -7.8924E-04 -7.7431E-04 -7.8980E-04 1.2103E-04 1.3322E-04 1.1514E-04
S16 -5.8721E-06 1.1932E-03 1.7750E-04 1.8381E-05 -2.0881E-04 -6.1409E-05 -2.7262E-05
S17 9.4479E-04 -2.9726E-03 2.7869E-03 -1.1430E-03 6.3661E-04 -2.8287E-04 1.1405E-04
S18 1.4918E-02 -4.1072E-03 3.0565E-03 -1.9034E-03 6.3765E-04 -6.6699E-04 4.5226E-04
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 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. Fig. 6C shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the optical imaging lens of embodiment 3. Fig. 6D shows a distortion curve of the optical imaging lens of embodiment 3, which represents distortion magnitude values corresponding to different image heights. 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 first lens E1, a second lens E2, a stop STO, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, a ninth lens E9, a filter E10, and an image plane S21.
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 convex object-side surface S3 and a concave 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. The sixth lens element E6 has negative power, and has a convex object-side surface S11 and a concave image-side surface S12. The seventh lens element E7 has negative power, and has a concave object-side surface S13 and a convex image-side surface S14. The eighth lens element E8 has positive power, and has a convex object-side surface S15 and a concave image-side surface S16. The ninth lens element E9 has negative power, and has a concave object-side surface S17 and a concave image-side surface S18. Filter E10 has an object side S19 and an image side S20. The light from the object sequentially passes through the respective surfaces S1 to S20 and is finally imaged on the imaging surface S21.
In the present example, the focal length f of the optical imaging lens is 8.02mm, the focal length f1 of the first lens is 7.97mm, the focal length f2 of the second lens is-14.05 mm, the focal length f3 of the third lens is-67.58 mm, the focal length f4 of the fourth lens is 13.97mm, the focal length f5 of the fifth lens is-390.44 mm, the focal length f6 of the sixth lens is-129.45 mm, the focal length f7 of the seventh lens is-79.80 mm, the focal length f8 of the eighth lens is 12.10mm, the focal length f9 of the ninth lens is-7.86 mm, the on-axis distance TTL of the object side surface of the first lens to the imaging plane (i.e., the distance on the optical axis from the object side surface S1 of the first lens E1 to the imaging plane S21 of the optical imaging lens) is 10.85mm, the diagonal length gh of the effective pixel area on the imaging plane S21 of the optical imaging lens is half of the maximum image length of the optical imaging lens h 8.45 mm-half of the maximum field angle of the optical imaging lens.
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 BDA0003340737400000151
Figure BDA0003340737400000161
TABLE 7
Flour mark A4 A6 A8 A10 A12 A14 A16
S1 1.6745E-02 3.5962E-03 -4.0369E-04 -5.8170E-04 -3.4297E-04 -1.5268E-04 -4.8039E-05
S2 7.7562E-02 -1.2401E-02 2.6082E-03 -7.8302E-04 9.7959E-05 -1.1515E-04 8.5180E-05
S3 9.4638E-02 -1.8288E-02 4.5156E-03 -6.5268E-04 1.9652E-04 -1.4281E-04 1.0386E-04
S4 1.9573E-02 -8.4725E-03 -7.5604E-04 -5.8570E-04 -1.3051E-04 -1.0458E-04 -2.8299E-06
S5 -2.8113E-01 1.7559E-02 8.2769E-04 -7.4615E-04 -2.5266E-04 -9.2613E-08 -9.6208E-06
S6 -2.7588E-01 3.6610E-02 3.8939E-03 -1.4486E-03 -3.4349E-04 7.8729E-05 1.8244E-06
S7 -1.9225E-01 -3.5044E-02 -4.5739E-03 -2.1833E-03 -5.7011E-04 1.3913E-05 -1.4253E-05
S8 -4.2186E-01 2.1375E-04 -1.2325E-02 2.1960E-03 -1.0483E-03 5.2942E-04 7.3104E-05
S9 -5.5437E-01 1.4970E-01 -5.2912E-03 1.0869E-03 -1.9715E-03 6.6443E-04 -1.8524E-04
S10 -6.6481E-01 -3.6193E-03 8.9338E-03 1.5904E-03 1.9132E-03 -4.7145E-05 2.1673E-04
S11 -6.1255E-01 -6.0497E-02 2.7627E-02 1.2591E-03 -5.2116E-04 -2.8500E-03 3.6202E-04
S12 -5.0884E-01 -1.5458E-02 3.9010E-02 -8.3412E-03 2.9469E-04 -3.3324E-03 1.6486E-03
S13 5.5719E-02 -2.3811E-01 6.2339E-02 -4.0806E-02 9.3354E-03 2.9210E-03 7.0470E-03
S14 -7.5862E-01 1.9775E-01 -6.4559E-03 -1.5021E-02 -7.2919E-04 1.3933E-02 2.7090E-03
S15 -4.8878E+00 3.9078E-01 5.0431E-02 2.7254E-02 -3.3103E-02 1.0426E-03 4.3774E-04
S16 -4.4147E+00 2.5780E-01 5.9166E-02 -6.2520E-02 1.7533E-02 -3.9567E-03 4.2239E-03
S17 -1.7338E+00 1.3111E+00 -6.4459E-01 3.1276E-01 -1.3139E-01 3.6573E-02 -3.3194E-03
S18 -7.6034E+00 1.9377E+00 -5.1167E-01 2.3359E-01 -9.8175E-02 3.1486E-02 -2.6380E-02
TABLE 8-1
Figure BDA0003340737400000162
Figure BDA0003340737400000171
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 a chromatic aberration of magnification curve of the optical imaging lens of embodiment 4, which represents a deviation of different image heights on the imaging plane after light passes through the lens. Fig. 8C shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the optical imaging lens of embodiment 4. Fig. 8D shows a distortion curve of the optical imaging lens of embodiment 4, which represents distortion magnitude values corresponding to different image heights. 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 first lens E1, a second lens E2, a stop STO, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, a ninth lens E9, a filter E10, and an image plane S21.
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 convex object-side surface S3 and a concave 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. The sixth lens element E6 has negative power, and has a convex object-side surface S11 and a concave image-side surface S12. The seventh lens element E7 has negative power, and has a concave object-side surface S13 and a convex image-side surface S14. The eighth lens element E8 has positive power, and has a convex object-side surface S15 and a concave image-side surface S16. The ninth lens element E9 has negative power, and has a concave object-side surface S17 and a concave image-side surface S18. Filter E10 has an object side S19 and an image side S20. The light from the object sequentially passes through the respective surfaces S1 to S20 and is finally imaged on the imaging surface S21.
In the present example, the focal length f of the optical imaging lens is 8.22mm, the focal length f1 of the first lens is 7.75mm, the focal length f2 of the second lens is-13.40 mm, the focal length f3 of the third lens is-60.49 mm, the focal length f4 of the fourth lens is 13.68mm, the focal length f5 of the fifth lens is-8402.12 mm, the focal length f6 of the sixth lens is-93.68 mm, the focal length f7 of the seventh lens is-74.32 mm, the focal length f8 of the eighth lens is 11.98mm, the focal length f9 of the ninth lens is-7.81 mm, the on-axis distance TTL of the object side surface of the first lens to the imaging plane (i.e., the distance on the optical axis from the object side surface S1 of the first lens E1 to the imaging plane S21 of the optical imaging lens) is 10.91mm, the diagonal length gh of the effective pixel area on the imaging plane S21 of the optical imaging lens is half of imh 8.40mm, and half of the maximum angle of the optical field angle is-44 mm.
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 BDA0003340737400000181
TABLE 9
Figure BDA0003340737400000182
Figure BDA0003340737400000191
TABLE 10-1
Flour mark A18 A20 A22 A24 A26 A28 A30
S1 -7.4624E-06 -9.2752E-06 -1.0092E-06 -3.7882E-07 2.0117E-06 -1.8687E-06 -2.8136E-06
S2 -4.8187E-05 2.3484E-05 -1.3146E-05 5.9746E-06 -4.0232E-06 3.2383E-06 -1.0404E-06
S3 -6.8718E-05 2.0507E-05 -1.7504E-05 3.9584E-06 -6.6080E-06 2.4392E-06 -2.4868E-07
S4 -6.1963E-05 -2.7309E-05 -1.1514E-05 -4.3039E-06 -1.5037E-06 -3.4200E-06 -2.8961E-06
S5 -2.2310E-05 -1.5418E-05 -1.3286E-06 -4.4042E-06 1.4927E-06 -2.6526E-06 8.8778E-07
S6 -4.2608E-06 1.3248E-05 -4.1742E-06 2.8272E-06 -1.2476E-06 5.9692E-06 -3.0132E-07
S7 3.8684E-05 1.9497E-05 7.6756E-06 -9.8214E-07 4.9709E-06 2.7815E-06 3.7277E-06
S8 9.9252E-05 4.2092E-05 -9.0980E-06 -7.7268E-06 -1.4084E-05 -4.1867E-06 4.4509E-06
S9 1.4270E-05 2.4365E-05 -4.7715E-05 3.2732E-05 5.0483E-06 1.4758E-05 -1.4045E-06
S10 -2.6190E-04 -4.7209E-05 -7.5479E-05 -8.2364E-06 4.5025E-06 8.3502E-06 5.7431E-06
S11 2.6450E-04 3.7978E-04 1.2119E-05 -1.3257E-05 -9.8348E-06 3.7830E-06 2.8145E-06
S12 6.9743E-05 4.5849E-04 -1.6825E-04 -3.4561E-05 -5.9117E-05 -3.4396E-06 -1.3316E-05
S13 7.9291E-04 2.4369E-04 -6.5923E-04 -3.4447E-04 -2.8144E-04 -8.8022E-05 -1.5644E-05
S14 -2.5068E-03 -2.1753E-03 -1.8878E-04 1.7456E-04 9.1943E-06 -1.0124E-04 -1.0586E-05
S15 6.8644E-03 -3.0190E-04 -1.3653E-03 -1.4694E-03 -2.5744E-04 -5.1195E-05 4.5861E-05
S16 -4.5492E-04 9.3579E-04 1.3468E-04 1.9672E-05 -2.2598E-04 -8.8084E-05 -1.4399E-06
S17 9.0249E-04 -3.1846E-03 2.7563E-03 -1.4329E-03 5.8546E-04 -2.3220E-04 7.1165E-05
S18 1.4669E-02 -3.8231E-03 2.6016E-03 -1.5732E-03 3.1578E-04 -7.2777E-04 2.4363E-04
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 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 plane after light passes through the lens. Fig. 10C shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the optical imaging lens of embodiment 5. Fig. 10D shows a distortion curve of the optical imaging lens of embodiment 5, which represents distortion magnitude values corresponding to different image heights. 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.
Figure BDA0003340737400000192
Figure BDA0003340737400000201
Watch 15
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 including, in order from an object side to an image side along an optical axis, a first lens having positive optical power, a second lens having optical power, a third lens having negative optical power, a fourth lens having optical power, a fifth lens having negative optical power, a sixth lens having negative optical power, a seventh lens having optical power, an eighth lens having optical power, and a ninth lens having optical power; wherein the content of the first and second substances,
the first lens is made of glass;
the image side surface of the fifth lens is a concave surface;
the object side surface of the seventh lens is a concave surface, and the image side surface of the seventh lens is a convex surface; and
a radius of curvature R15 of an object-side surface of the eighth lens, a radius of curvature R16 of an image-side surface of the eighth lens, and a focal length f8 of the eighth lens satisfy: f8/(R15+ R16) < 1.7.
2. The optical imaging lens of claim 1, wherein ImgH, which is half the diagonal length of the effective pixel area on the imaging plane, and TTL, which is the on-axis distance from the object side surface of the first lens element to the imaging plane, satisfy: TTL/ImgH is less than or equal to 1.3.
3. The optical imaging lens of claim 1, wherein the focal length f of the optical imaging lens and the entrance pupil diameter EPD of the optical imaging lens satisfy: f/EPD is less than or equal to 1.5.
4. The optical imaging lens of claim 1, wherein the Semi-FOV of the maximum field angle of the optical imaging lens satisfies: Semi-FOV > 40.
5. The optical imaging lens according to claim 1, wherein ImgH, which is half the diagonal length of the effective pixel area on the imaging plane, satisfies: ImgH > 8.0 mm.
6. The optical imaging lens according to claim 1, characterized in that the optical imaging lens further comprises a stop, and a sum Σ AT of an on-axis distance SL from the stop to the imaging surface and an air interval on the optical axis between any adjacent two lenses having optical powers of the first lens to the ninth lens satisfies: 2.0 < SL/∑ AT < 2.5.
7. The optical imaging lens of claim 1, wherein the radius of curvature R7 of the object-side surface of the fourth lens, the radius of curvature R8 of the image-side surface of the fourth lens, and the focal length f4 of the fourth lens satisfy: 1.0 < (R7+ R8)/f4 < 2.0.
8. The optical imaging lens of claim 1, wherein the radius of curvature R17 of the object-side surface of the ninth lens and the radius of curvature R18 of the image-side surface of the ninth lens satisfy: 13.5 < R17/R18 < -9.0.
9. The optical imaging lens of claim 1, wherein an on-axis distance SAG71 between an intersection point of an object-side surface of the seventh lens and the optical axis to an effective radius vertex of the object-side surface of the seventh lens and an on-axis distance SAG72 between an intersection point of an image-side surface of the seventh lens and the optical axis to an effective radius vertex of an image-side surface of the seventh lens satisfy: -6.0 < (SAG71+ SAG72)/(SAG71-SAG72) < -4.0.
10. The optical imaging lens of claim 1, wherein an on-axis distance SAG52 between an intersection point of the image-side surface of the fifth lens and the optical axis to an effective radius vertex of the image-side surface of the fifth lens and an on-axis distance SAG62 between an intersection point of the image-side surface of the sixth lens and the optical axis to an effective radius vertex of the image-side surface of the sixth lens satisfy: 2.0 < SAG52/SAG62 < 4.5.
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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110531503A (en) * 2019-10-10 2019-12-03 浙江舜宇光学有限公司 Optical imaging lens
CN111487748A (en) * 2019-01-28 2020-08-04 康达智株式会社 Camera lens
CN113552696A (en) * 2021-07-15 2021-10-26 江西晶超光学有限公司 Optical system, image capturing module and electronic equipment

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111487748A (en) * 2019-01-28 2020-08-04 康达智株式会社 Camera lens
CN110531503A (en) * 2019-10-10 2019-12-03 浙江舜宇光学有限公司 Optical imaging lens
CN113552696A (en) * 2021-07-15 2021-10-26 江西晶超光学有限公司 Optical system, image capturing module and electronic equipment

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