CN215264209U - Optical imaging lens - Google Patents

Optical imaging lens Download PDF

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CN215264209U
CN215264209U CN202121779057.8U CN202121779057U CN215264209U CN 215264209 U CN215264209 U CN 215264209U CN 202121779057 U CN202121779057 U CN 202121779057U CN 215264209 U CN215264209 U CN 215264209U
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lens
optical imaging
optical
imaging lens
optical axis
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刘子维
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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Abstract

The application discloses optical imaging lens includes following preface from object side to image side along optical axis: a first lens having a positive optical power; a second lens having a negative optical power; a third lens having a positive refractive power, an object-side surface of which is convex; 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 distance TTL from the object side surface of the first lens to the imaging surface of the optical imaging lens along the optical axis, half of the diagonal length ImgH of the effective pixel area on the imaging surface and half of the maximum field angle Semi-FOV of the optical imaging lens meet the following conditions: TTL/(ImgH/tan (Semi-FOV)) < 1.25. The effective focal length f2 of the second lens and the entrance pupil diameter EPD of the optical imaging lens satisfy that: -6 < f2/EPD < -3. The effective focal length f1 of the first lens and the effective focal length f of the optical imaging lens meet the following conditions: f1/f is more than 0.5 and less than 1.

Description

Optical imaging lens
Technical Field
The present application relates to the field of optical elements, and more particularly, to an optical imaging lens.
Background
Electronic products such as smart phones and tablet computers have the advantage of being portable, so that the popularization degree of the electronic products is higher and higher, and the development of cameras carried in the electronic products is also new and different day by day. On the other hand, the trend of electronic products to be more and more light and thin is more and more demanding, and the size of the imaging lens applied to the electronic products is required to be more compact and light and thin. On the other hand, as the performance of CCD (Charge Coupled Device) and CMOS (Complementary Metal Oxide Semiconductor) image sensors is improved and the size thereof is reduced, the corresponding imaging lens is also required to have high-quality imaging performance and miniaturization. Therefore, miniaturization and high imaging quality are the trends of optical imaging lenses in order to be more suitable for the demands of the developing portable electronic products for their application.
SUMMERY OF THE UTILITY MODEL
An aspect of the present disclosure provides an optical imaging lens, sequentially from an object side to an image side along an optical axis, comprising: a first lens having a positive optical power; a second lens having a negative optical power; a third lens having a positive refractive power, an object-side surface of which is convex; 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 distance TTL from the object side surface of the first lens to the imaging surface of the optical imaging lens along the optical axis, half of the diagonal length ImgH of the effective pixel area on the imaging surface and half of the maximum field angle Semi-FOV of the optical imaging lens can satisfy the following conditions: TTL/(ImgH/tan (Semi-FOV)) < 1.25. The effective focal length f2 of the second lens and the entrance pupil diameter EPD of the optical imaging lens can satisfy: -6 < f2/EPD < -3. The effective focal length f1 of the first lens and the effective focal length f of the optical imaging lens can satisfy: f1/f is more than 0.5 and less than 1.
In one embodiment, ImgH, which is half the diagonal length of the effective pixel area on the imaging plane, may satisfy: ImgH > 5.
In one embodiment, the maximum effective radius DT22 of the image-side surface of the second lens and the maximum effective radius DT42 of the image-side surface of the fourth lens may satisfy: DT22/DT42 of more than 0 and less than or equal to 0.57.
In one embodiment, the maximum effective radius DT31 of the object-side surface of the third lens and the maximum effective radius DT21 of the object-side surface of the second lens may satisfy: 0.8 < DT31/DT21 < 1.
In one embodiment, a maximum effective radius DT32 of an image-side surface of the third lens is spaced from the first and second lenses by a distance T12 on the optical axis, which satisfies: 1 < DT32/T12 < 1.2.
In one embodiment, the edge thickness ET1 of the first lens and the center thickness CT1 of the first lens on the optical axis may satisfy: 0 < ET1/CT1 < 0.5.
In one embodiment, the edge thickness ET6 of the sixth lens and the edge thickness ET5 of the fifth lens may satisfy: 0 < (ET6-ET5)/(ET6+ ET5) is less than or equal to 0.45.
In one embodiment, a central thickness CT6 of the sixth lens on the optical axis and a central thickness CT5 of the fifth lens on the optical axis may satisfy: CT6/CT5 are more than 0 and less than or equal to 1.03.
In one embodiment, a radius of curvature R12 of an image-side surface of the sixth lens and a radius of curvature R11 of an object-side surface of the sixth lens may satisfy: 0 < R12/R11 < 1.
In one embodiment, a center thickness CT5 of the fifth lens on the optical axis, a separation distance T45 of the fourth lens and the fifth lens on the optical axis, and a separation distance T56 of the fifth lens and the sixth lens on the optical axis may satisfy: 0.3 < CT5/(T45+ T56) < 0.9.
In one embodiment, a sum Σ AT of a spacing distance T12 on the optical axis of the first lens and the second lens and a spacing distance on the optical axis between any adjacent two lenses of the first lens to the fourth lens may satisfy: 0 < T12/∑ AT < 0.2.
In one embodiment, an on-axis distance SAG61 from an intersection point of an object-side surface of the sixth lens and an optical axis to a vertex of an effective radius of an object-side surface of the sixth lens to an intersection point of an image-side surface of the sixth lens and an optical axis to a vertex of an effective radius of an image-side surface of the sixth lens may satisfy SAG 62: 0.5 < SAG61/SAG62 < 1.
In one embodiment, the effective focal length f3 of the third lens, the radius of curvature R5 of the object-side surface of the third lens, and the radius of curvature R6 of the image-side surface of the third lens may satisfy: 0 < f 3/| R5+ R6 | < 2.
Another aspect of the present disclosure provides an optical imaging lens, in order from an object side to an image side along an optical axis, comprising: a first lens having a positive optical power; a second lens having a negative optical power; a third lens having a positive refractive power, an object-side surface of which is convex; 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 distance TTL from the object side surface of the first lens to the imaging surface of the optical imaging lens along the optical axis, half of the diagonal length ImgH of the effective pixel area on the imaging surface and half of the maximum field angle Semi-FOV of the optical imaging lens can satisfy the following conditions: TTL/(ImgH/tan (Semi-FOV)) < 1.25. The ImgH of half the diagonal length of the effective pixel area on the imaging plane may satisfy: ImgH > 5. The effective focal length f1 of the first lens and the effective focal length f of the optical imaging lens can satisfy: f1/f is more than 0.5 and less than 1.
In one embodiment, the maximum effective radius DT22 of the image-side surface of the second lens and the maximum effective radius DT42 of the image-side surface of the fourth lens may satisfy: DT22/DT42 of more than 0 and less than or equal to 0.57.
In one embodiment, the effective focal length f2 of the second lens and the entrance pupil diameter EPD of the optical imaging lens may satisfy: -6 < f2/EPD < -3.
In one embodiment, the maximum effective radius DT31 of the object-side surface of the third lens and the maximum effective radius DT21 of the object-side surface of the second lens may satisfy: 0.8 < DT31/DT21 < 1.
In one embodiment, a maximum effective radius DT32 of an image-side surface of the third lens is spaced from the first and second lenses by a distance T12 on the optical axis, which satisfies: 1 < DT32/T12 < 1.2.
In one embodiment, the edge thickness ET1 of the first lens and the center thickness CT1 of the first lens on the optical axis may satisfy: 0 < ET1/CT1 < 0.5.
In one embodiment, the edge thickness ET6 of the sixth lens and the edge thickness ET5 of the fifth lens may satisfy: 0 < (ET6-ET5)/(ET6+ ET5) is less than or equal to 0.45.
In one embodiment, a central thickness CT6 of the sixth lens on the optical axis and a central thickness CT5 of the fifth lens on the optical axis may satisfy: CT6/CT5 are more than 0 and less than or equal to 1.03.
In one embodiment, a radius of curvature R12 of an image-side surface of the sixth lens and a radius of curvature R11 of an object-side surface of the sixth lens may satisfy: 0 < R12/R11 < 1.
In one embodiment, a center thickness CT5 of the fifth lens on the optical axis, a separation distance T45 of the fourth lens and the fifth lens on the optical axis, and a separation distance T56 of the fifth lens and the sixth lens on the optical axis may satisfy: 0.3 < CT5/(T45+ T56) < 0.9.
In one embodiment, a sum Σ AT of a spacing distance T12 on the optical axis of the first lens and the second lens and a spacing distance on the optical axis between any adjacent two lenses of the first lens to the fourth lens may satisfy: 0 < T12/∑ AT < 0.2.
In one embodiment, an on-axis distance SAG61 from an intersection point of an object-side surface of the sixth lens and an optical axis to a vertex of an effective radius of an object-side surface of the sixth lens to an intersection point of an image-side surface of the sixth lens and an optical axis to a vertex of an effective radius of an image-side surface of the sixth lens may satisfy SAG 62: 0.5 < SAG61/SAG62 < 1.
In one embodiment, the effective focal length f3 of the third lens, the radius of curvature R5 of the object-side surface of the third lens, and the radius of curvature R6 of the image-side surface of the third lens may satisfy: 0 < f 3/| R5+ R6 | < 2.
The six-piece type lens framework is adopted, and the lens has the beneficial effects of being at least one of ultrathin, high in pixel, large in image plane, good in imaging quality and the like by reasonably distributing the focal power of each lens and optimally selecting the surface type and the thickness of each lens.
Drawings
Other features, objects, and advantages of the present application will become more apparent from the following detailed description of non-limiting embodiments when taken in conjunction with the accompanying drawings. In the drawings:
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;
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;
fig. 11 is a schematic structural view showing an optical imaging lens according to embodiment 6 of the present application; and
fig. 12A to 12D show an axial chromatic aberration curve, an astigmatism curve, a distortion curve, and a chromatic aberration of magnification curve, respectively, of the optical imaging lens of embodiment 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. In this document, the surface of each lens closest to the subject is referred to as the object-side surface of the lens, and the surface of each lens closest to the image plane is referred to as 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 according to an exemplary embodiment of the present application may include, for example, six lenses having optical powers, i.e., a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens. The six lenses are arranged in order from the object side to the image side along the optical axis.
In an exemplary embodiment, the first lens may have a positive optical power; the second lens may have a negative optical power; the third lens may have a positive optical power; the fourth lens may have a positive power or a negative power; the fifth lens may have a positive power or a negative power; the sixth lens may have a positive power or a negative power.
In an exemplary embodiment, the object side surface of the third lens may be convex. The object side surface of the sixth lens element may be convex.
By reasonably configuring the focal power and the surface type of each lens, better imaging quality can be obtained, and the characteristic of ultra-thin system can be realized.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression TTL/(ImgH/tan (Semi-FOV)) < 1.25, where TTL is a distance along an optical axis from an object side surface of the first lens to an imaging plane of the optical imaging lens, ImgH is a half of a diagonal length of an effective pixel area on the imaging plane, and Semi-FOV is a half of a maximum field angle of the optical imaging lens. By controlling the distance from the object side surface of the first lens to the imaging surface of the optical imaging lens along the optical axis, half of the diagonal length of the effective pixel area on the imaging surface and half of the maximum field angle of the optical imaging lens to satisfy the conditional expression TTL/(ImgH/tan (Semi-FOV)) < 1.25, the low-order aberration of a control system can be effectively balanced, the sensitivity of tolerance can be reduced, and the miniaturization of the system is favorably maintained; in addition, the optical system has the characteristic of high pixel, and can effectively improve the resolution of the system. More specifically, TTL, ImgH, and Semi-FOV may satisfy TTL/(ImgH/tan (Semi-FOV)) < 1.23.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression ImgH > 5, where ImgH is half the diagonal length of the effective pixel area on the imaging plane. By controlling the value of half the diagonal length of the effective pixel area on the imaging plane within this range, better imaging quality can be facilitated. More specifically, ImgH may satisfy ImgH > 5.2.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression-6 < f2/EPD < -3, where f2 is the effective focal length of the second lens and EPD is the entrance pupil diameter of the optical imaging lens. By controlling the ratio of the effective focal length of the second lens to the entrance pupil diameter of the optical imaging lens within the range, the characteristics of ultrathin and large image surface of the system can be realized, and better imaging quality can be obtained. More specifically, f2 and EPD can satisfy-5 < f2/EPD < -4.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression 0 < DT22/DT42 ≦ 0.57, where DT22 is the maximum effective radius of the image-side surface of the second lens, and DT42 is the maximum effective radius of the image-side surface of the fourth lens. The ratio of the maximum effective radius of the image side surface of the second lens to the maximum effective radius of the image side surface of the fourth lens is controlled within the range, so that the incident light range can be reasonably limited, light with poor edge quality can be eliminated, off-axis aberration can be reduced, and the resolving power of the optical imaging lens can be effectively improved. More specifically, DT22 and DT42 may satisfy 0.5 < DT22/DT42 ≦ 0.57.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression 0.8 < DT31/DT21 < 1, where DT31 is the maximum effective radius of the object-side surface of the third lens and DT21 is the maximum effective radius of the object-side surface of the second lens. By controlling the ratio of the maximum effective radius of the object side surface of the third lens to the maximum effective radius of the object side surface of the second lens within the range, the size of the front end of the lens can be favorably reduced, so that the whole optical imaging lens is lighter and thinner.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression 1 < DT32/T12 < 1.2, where DT32 is a maximum effective radius of an image side surface of the third lens, and T12 is a separation distance of the first lens and the second lens on an optical axis. By controlling the ratio of the maximum effective radius of the image side surface of the third lens to the distance between the first lens and the second lens on the optical axis within the range, the field curvature and the distortion of the system can be effectively ensured, so that the off-axis field of view has good imaging quality. More specifically, DT32 and T12 may satisfy 1 < DT32/T12 < 1.1.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression 0.5 < f1/f < 1, where f1 is an effective focal length of the first lens and f is an effective focal length of the optical imaging lens. By controlling the ratio of the effective focal length of the first lens to the effective focal length of the optical imaging lens within the range, the curvature of field of the constraint system can be reasonably controlled within a certain range. More specifically, f1 and f can satisfy 0.7 < f1/f < 0.9.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression 0 < ET1/CT1 < 0.5, where ET1 is an edge thickness of the first lens and CT1 is a center thickness of the first lens on an optical axis. By controlling the ratio of the edge thickness of the first lens to the center thickness of the first lens on the optical axis within the range, the shape of the first lens can be effectively controlled, and the molding processing is facilitated. More specifically, ET1 and CT1 may satisfy 0.3 < ET1/CT1 < 0.4.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression 0 < (ET6-ET5)/(ET6+ ET5) ≦ 0.45, where ET6 is the edge thickness of the sixth lens and ET5 is the edge thickness of the fifth lens. By controlling the ratio of the difference between the edge thickness of the sixth lens and the edge thickness of the fifth lens to the sum of the edge thickness of the sixth lens and the edge thickness of the fifth lens within the range, spherical aberration and chromatic aberration can be effectively reduced, and the imaging quality of the lens is improved.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression 0 < CT6/CT5 ≦ 1.03, where CT6 is a central thickness of the sixth lens on the optical axis and CT5 is a central thickness of the fifth lens on the optical axis. By controlling the ratio of the central thickness of the sixth lens on the optical axis to the central thickness of the fifth lens on the optical axis to be in the range, the distortion contribution of the sixth lens and the fifth lens can be in a reasonable range, so that the final distortion of each field of view is controlled to be within 2%, the sensitivity of the sixth lens and the fifth lens is reduced, the injection molding is easy, and the yield of the system is improved. More specifically, CT6 and CT5 can satisfy 0.5 < CT6/CT5 ≦ 1.03.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression 0 < R12/R11 < 1, where R12 is a radius of curvature of an image-side surface of the sixth lens, and R11 is a radius of curvature of an object-side surface of the sixth lens. By controlling the ratio of the curvature radius of the image side surface of the sixth lens element to the curvature radius of the object side surface of the sixth lens element within the range, the deflection angle of the system edge light can be reasonably controlled, and the sensitivity of the system can be effectively reduced. More specifically, R12 and R11 may satisfy 0 < R12/R11 < 0.6.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression 0.3 < CT5/(T45+ T56) < 0.9, where CT5 is a center thickness of the fifth lens on the optical axis, T45 is a separation distance of the fourth lens and the fifth lens on the optical axis, and T56 is a separation distance of the fifth lens and the sixth lens on the optical axis. By controlling the ratio of the center thickness of the fifth lens on the optical axis to the sum of the distance between the fourth lens and the fifth lens on the optical axis and the distance between the fifth lens and the sixth lens on the optical axis within the range, the field curvature and the distortion of the system can be effectively ensured, so that the off-axis field has good imaging quality. More specifically, CT5, T45, and T56 may satisfy 0.5 < CT5/(T45+ T56) < 0.8.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression 0 < T12/∑ AT < 0.2, where T12 is a separation distance between the first lens and the second lens on the optical axis, and Σ AT is a sum of separation distances between any adjacent two lenses of the first lens to the fourth lens on the optical axis. By controlling the ratio of the distance between the first lens and the second lens on the optical axis to the sum of the distances between any two adjacent lenses from the first lens to the fourth lens on the optical axis within the range, the distortion contribution of the system can be reasonably controlled, and the system has good distortion performance.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression 0.5 < SAG61/SAG62 < 1, where SAG61 is an on-axis distance from an intersection of an object-side surface of the sixth lens and the optical axis to an effective radius vertex of the object-side surface of the sixth lens, and SAG62 is an on-axis distance from an intersection 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. The ratio of the on-axis distance from the intersection point of the object-side surface of the sixth lens and the optical axis to the effective radius peak of the object-side surface of the sixth lens to the on-axis distance from the intersection point of the image-side surface of the sixth lens and the optical axis to the effective radius peak of the image-side surface of the sixth lens is controlled within the range, so that the sixth lens can be favorably processed, molded and assembled, good imaging quality is obtained, the trend of light rays in the edge field can be effectively controlled, and the system can be better matched with a chip. More specifically, SAG61 and SAG62 may satisfy 0.6 < SAG61/SAG62 < 1.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression 0 < f 3/| R5+ R6 | < 2, where f3 is an effective focal length of the third lens, R5 is a radius of curvature of an object-side surface of the third lens, and R6 is a radius of curvature of an image-side surface of the third lens. By controlling the ratio of the effective focal length of the third lens to the absolute value of the sum of the curvature radius of the object-side surface of the third lens and the curvature radius of the image-side surface of the third lens within the range, the contribution of the third lens to the fifth-order spherical aberration of the system can be well controlled, and further the third-order spherical aberration generated by the lens is compensated, so that the system has good imaging quality on the axis. More specifically, f3, R5 and R6 satisfy 0.1 < f 3/| R5+ R6 | < 1.8.
In an exemplary embodiment, the optical imaging lens may further include at least one diaphragm. The stop may be disposed at an appropriate position as needed, for example, between the object side and the first lens. Optionally, the optical imaging lens may further include a filter for correcting color deviation and/or a protective glass for protecting a photosensitive element on the imaging surface.
The optical imaging lens according to the above-described embodiment of the present application may employ a plurality of lenses, for example, six lenses as described above. By reasonably distributing the focal power and the surface type of each lens, the central thickness of each lens, the on-axis distance between each lens and the like, the lens has the characteristics of ultrathin thickness, high pixel, large image plane, good imaging quality and the like.
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 in imaging can be eliminated as much as possible, and the imaging quality is further improved. 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 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 six lenses are exemplified in the embodiment, the optical imaging lens is not limited to including six 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, in order from an object side to an image side along an optical axis, comprises: a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, and a filter E7.
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 positive 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 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. Filter E7 has an object side S13 and an image side S14. The optical imaging lens has an imaging surface S15, and light from the object passes through the respective surfaces S1 to S14 in order and is finally imaged on the imaging surface S15.
Table 1 shows basic parameters of the optical imaging lens of embodiment 1, in which the unit of the radius of curvature and the thickness/distance are both millimeters (mm).
Figure BDA0003191731040000071
TABLE 1
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:
Figure BDA0003191731040000072
wherein x is the rise of the distance from the aspheric surface vertex to the aspheric surface vertex when the aspheric surface is at the position with the height of h along the optical axis direction; c is the paraxial curvature of the aspheric surface, c being 1/R (i.e., paraxial curvature c is the inverse of radius of curvature R in table 1 above); k is a conic coefficient; ai is the correction coefficient of the i-th order of the aspherical surface. The high-order term coefficients A usable for the aspherical mirror surfaces S1 to S12 in example 1 are shown in Table 2-1 and Table 2-2 below4、A6、A8、A10、A12、A14、A16、A18、A20、A22、A24、A26And A28。
Figure BDA0003191731040000073
Figure BDA0003191731040000081
TABLE 2-1
Flour mark A18 A20 A22 A24 A26 A28
S1 -1.0085E-05 -2.1860E-06 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S2 6.6811E-06 4.0892E-06 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S3 9.6278E-06 3.3439E-06 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S4 7.3445E-06 -2.6215E-08 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S5 9.0826E-06 1.2693E-05 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S6 -1.1244E-04 -7.0856E-05 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S7 -6.9607E-06 -1.6265E-04 -7.9489E-05 -5.1728E-05 0.0000E+00 0.0000E+00
S8 -1.5376E-04 2.8854E-04 7.7682E-05 -1.1441E-04 0.0000E+00 0.0000E+00
S9 -3.1921E-04 3.8146E-04 1.4803E-04 -2.1916E-04 -2.1130E-05 3.6349E-05
S10 1.9506E-03 -1.3448E-03 6.2969E-04 -4.2480E-04 3.6728E-05 -1.2160E-04
S11 2.9386E-03 -1.9765E-03 2.2329E-03 -1.4107E-03 4.9249E-04 -1.3389E-04
S12 9.6819E-03 -8.9844E-04 3.1333E-03 -9.5559E-04 -4.7203E-05 -4.4847E-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 convergent focus deviation 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, in order from an object side to an image side along an optical axis, comprises: a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, and a filter E7.
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 positive power, and has a convex object-side surface S5 and a convex 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 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. Filter E7 has an object side S13 and an image side S14. The optical imaging lens has an imaging surface S15, and light from the object passes through the respective surfaces S1 to S14 in order and is finally imaged on the imaging surface S15.
Table 3 shows basic parameters of the optical imaging lens of embodiment 2, in which the unit of the radius of curvature and the thickness/distance are both millimeters (mm). Tables 4-1 and 4-2 show the high-order term coefficients A that can be used for the aspherical mirror surfaces S1 through S12 in example 24、A6、A8、A10、A12、A14、A16、A18、A20、A22、A24、A26And A28Wherein each aspherical surface shape can be defined by the formula (1) given in the above-described embodiment 1.
Figure BDA0003191731040000091
TABLE 3
Flour mark A4 A6 A8 A10 A12 A14 A16
S1 -2.4483E-02 -7.8243E-03 -3.5452E-03 -1.3546E-03 -4.9439E-04 -1.5446E-04 -6.0430E-05
S2 -4.1766E-02 -1.5433E-03 -1.6111E-03 -3.1497E-04 -8.4590E-05 -3.8882E-05 -9.2494E-06
S3 1.3042E-02 1.3576E-02 -7.7993E-04 3.3019E-04 4.3239E-06 -3.7315E-05 -4.0321E-06
S4 5.1637E-02 1.2718E-02 6.2817E-04 4.5758E-04 1.0109E-04 1.8485E-05 -6.5016E-07
S5 -8.1858E-02 2.1906E-05 -1.1794E-04 2.1307E-04 6.3556E-05 5.1831E-07 -8.4350E-06
S6 -1.3382E-01 9.2400E-03 4.5231E-03 2.3950E-03 6.4363E-04 1.3772E-04 -7.8568E-05
S7 -3.3023E-01 1.4343E-02 -8.5183E-03 -2.9218E-03 6.7432E-04 7.7826E-04 4.2959E-04
S8 -4.1822E-01 1.3695E-01 -3.7520E-02 -8.5077E-03 6.3470E-03 6.8523E-05 -1.0771E-03
S9 -1.3483E+00 2.4600E-01 5.7392E-02 -5.5619E-02 9.1878E-03 6.0339E-03 1.4042E-03
S10 -1.5925E+00 2.4228E-02 5.0634E-02 -4.0489E-03 -9.1504E-03 -3.1928E-03 2.1966E-03
S11 -3.8285E+00 1.1858E+00 -3.8532E-01 1.2691E-01 -6.7233E-02 4.2366E-02 -1.4009E-02
S12 -6.8478E+00 1.2803E+00 -3.3786E-01 1.7481E-01 -8.0832E-02 2.2284E-02 -2.0475E-02
TABLE 4-1
Figure BDA0003191731040000092
Figure BDA0003191731040000101
TABLE 4-2
Fig. 4A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 2, which represents the 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 of embodiment 2. Fig. 4C shows a distortion curve of the optical imaging lens of embodiment 2, which represents distortion magnitude values corresponding to different image heights. Fig. 4D shows a chromatic aberration of magnification curve of the optical imaging lens of embodiment 2, which represents the deviation of different image heights on the imaging plane after light passes through the lens. As can be seen from fig. 4A to 4D, the optical imaging lens according to embodiment 2 can achieve good imaging quality.
Example 3
An optical imaging lens according to embodiment 3 of the present application is described below with reference to fig. 5 to 6D. Fig. 5 shows a schematic structural diagram of an optical imaging lens according to embodiment 3 of the present application.
As shown in fig. 5, the optical imaging lens, in order from an object side to an image side along an optical axis, comprises: a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, and a filter E7.
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 positive 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 optical imaging lens has an imaging surface S15, and light from the object passes through the respective surfaces S1 to S14 in order and is finally imaged on the imaging surface S15.
Table 5 shows basic parameters of the optical imaging lens of embodiment 3, in which the unit of the radius of curvature and the thickness/distance are both millimeters (mm). Tables 6-1 and 6-2 show the high-order term coefficients A that can be used for the aspherical mirror surfaces S1 to S12 in example 34、A6、A8、A10、A12、A14、A16、A18、A20、A22、A24、A26、A28And A30Wherein each aspherical surface shape can be defined by the formula (1) given in the above-described embodiment 1.
Figure BDA0003191731040000102
Figure BDA0003191731040000111
TABLE 5
Flour mark A4 A6 A8 A10 A12 A14 A16
S1 4.2699E-03 -4.8075E-03 -4.0630E-03 -1.8299E-03 -7.3453E-04 -2.1539E-04 -7.0278E-05
S2 -8.2217E-02 1.5830E-03 -2.5644E-03 -4.1081E-04 -4.2186E-05 -4.7076E-05 -8.0337E-06
S3 1.4523E-02 2.3948E-02 -8.6464E-04 1.1871E-03 1.3751E-04 -5.8151E-05 8.5563E-06
S4 6.5630E-02 2.4319E-02 3.0302E-03 2.1270E-03 6.7966E-04 2.0277E-04 4.7986E-05
S5 -1.8140E-01 -1.0835E-02 7.4206E-04 1.6517E-03 9.0673E-04 3.7212E-04 1.7939E-04
S6 -2.8119E-01 7.6992E-03 1.1770E-02 6.1385E-03 1.7078E-03 8.6412E-05 -2.4214E-04
S7 -5.7232E-01 2.1361E-01 -6.4428E-02 -2.2234E-03 6.0161E-03 -3.6666E-04 -2.1080E-03
S8 -9.8146E-01 3.8487E-01 -1.4786E-01 7.9273E-03 1.3838E-02 -5.5661E-03 -3.7081E-03
S9 -1.5907E+00 3.4150E-01 4.6361E-02 -3.0371E-02 -1.3773E-02 4.0749E-03 8.1563E-03
S10 2.5322E-01 4.8891E-02 2.3080E-02 2.7874E-02 6.7566E-03 3.3074E-03 -7.5539E-04
S11 -2.1263E+00 1.1309E+00 -5.5463E-01 2.6793E-01 -1.3364E-01 6.2285E-02 -3.0896E-02
S12 -6.5944E+00 1.5861E+00 -4.2640E-01 2.4801E-01 -1.5313E-01 5.2223E-02 -3.4241E-02
TABLE 6-1
Flour mark A18 A20 A22 A24 A26 A28 A30
S1 -1.0871E-05 -4.4635E-06 5.3137E-06 8.2902E-06 4.5537E-06 -1.6154E-06 -2.3619E-06
S2 4.7076E-06 6.8790E-06 7.1767E-06 1.0290E-05 8.3245E-06 -1.0143E-06 -7.0838E-06
S3 2.1805E-06 1.7881E-05 5.8464E-06 2.9159E-06 2.0030E-06 1.6004E-06 -5.7925E-06
S4 2.7422E-06 -1.7821E-05 -1.0688E-05 -9.3552E-06 -2.2810E-06 -5.5331E-06 -2.3249E-06
S5 4.2271E-05 3.4609E-05 4.3204E-06 8.0468E-06 -6.9840E-06 -6.0632E-06 -1.0253E-05
S6 -2.7382E-04 -1.2137E-04 -7.1134E-05 -9.0454E-06 -1.1640E-05 2.9447E-06 -4.2664E-06
S7 1.8665E-04 3.7618E-04 -3.7962E-04 2.9256E-05 3.8732E-05 7.0858E-05 1.6939E-05
S8 1.8760E-03 3.6490E-04 -1.0117E-03 3.3574E-04 1.5209E-04 -4.8700E-05 -8.7384E-05
S9 -3.3864E-03 -1.5018E-03 2.7145E-04 7.1999E-04 -2.2484E-04 -6.0416E-05 1.3429E-05
S10 -5.5282E-03 -8.8250E-04 -7.6171E-04 -2.8112E-04 1.1904E-04 2.2840E-04 2.3593E-04
S11 1.6143E-02 -7.6835E-03 1.6483E-03 7.3305E-04 -1.2552E-03 6.4736E-04 -2.0682E-04
S12 2.2046E-02 -5.9502E-03 3.5954E-03 -3.3324E-03 3.8591E-04 -6.0240E-04 5.3857E-04
TABLE 6-2
Fig. 6A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 3, which represents the 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 of embodiment 3. Fig. 6C shows a distortion curve of the optical imaging lens of embodiment 3, which represents distortion magnitude values corresponding to different image heights. Fig. 6D shows a chromatic aberration of magnification curve of the optical imaging lens of embodiment 3, which represents a deviation of different image heights on the imaging plane after light passes through the lens. As can be seen from fig. 6A to 6D, the optical imaging lens according to embodiment 3 can achieve good imaging quality.
Example 4
An optical imaging lens according to embodiment 4 of the present application is described below with reference to fig. 7 to 8D. Fig. 7 shows a schematic structural diagram of an optical imaging lens according to embodiment 4 of the present application.
As shown in fig. 7, the optical imaging lens, in order from an object side to an image side along an optical axis, comprises: a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, and a filter E7.
The first lens element E1 has positive power, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens element E2 has negative power, and has a concave object-side surface S3 and a concave image-side surface S4. The third lens element E3 has positive power, and has a convex object-side surface S5 and a convex 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 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. Filter E7 has an object side S13 and an image side S14. The optical imaging lens has an imaging surface S15, and light from the object passes through the respective surfaces S1 to S14 in order and is finally imaged on the imaging surface S15.
Table 7 shows basic parameters of the optical imaging lens of embodiment 4, in which the unit of the radius of curvature and the thickness/distance are both millimeters (mm). Tables 8-1 and 8-2 show the high-order term coefficients A that can be used for the aspherical mirror surfaces S1 to S12 in example 44、A6、A8、A10、A12、A14、A16、A18、A20、A22、A24、A26And A28Wherein each aspherical surface shape can be defined by the formula (1) given in the above-described embodiment 1.
Figure BDA0003191731040000121
TABLE 7
Figure BDA0003191731040000122
Figure BDA0003191731040000131
TABLE 8-1
Flour mark A18 A20 A22 A24 A26 A28
S1 -2.7429E-06 3.0529E-06 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S2 -4.0062E-09 3.1256E-06 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S3 1.1194E-05 6.3988E-06 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S4 4.0697E-06 -2.6362E-06 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S5 5.9164E-06 2.8156E-06 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S6 8.3967E-06 -1.1521E-05 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
S7 2.7498E-04 6.7408E-05 4.4115E-05 -1.2949E-05 0.0000E+00 0.0000E+00
S8 -2.2725E-04 3.8708E-04 1.8490E-04 -1.0943E-04 0.0000E+00 0.0000E+00
S9 -1.2981E-03 -1.7173E-04 6.5389E-04 -1.0518E-04 6.9742E-05 -8.5175E-05
S10 4.6890E-03 -1.6083E-03 -1.1769E-04 -1.4361E-03 -3.5287E-04 -2.3681E-04
S11 1.8352E-03 -2.5019E-03 2.6818E-03 -2.3083E-03 5.3651E-04 -1.4978E-04
S12 1.0016E-02 -3.8737E-03 2.1198E-03 -1.2597E-03 4.4416E-04 -5.5343E-04
TABLE 8-2
Fig. 8A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 4, which represents the 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 of embodiment 4. Fig. 8C shows a distortion curve of the optical imaging lens of embodiment 4, which represents distortion magnitude values corresponding to different image heights. Fig. 8D shows a chromatic aberration of magnification curve of the optical imaging lens of embodiment 4, which represents the deviation of different image heights on the imaging plane after light passes through the lens. As can be seen from fig. 8A to 8D, the optical imaging lens according to embodiment 4 can achieve good imaging quality.
Example 5
An optical imaging lens according to embodiment 5 of the present application is described below with reference to fig. 9 to 10D. Fig. 9 shows a schematic structural diagram of an optical imaging lens according to embodiment 5 of the present application.
As shown in fig. 9, the optical imaging lens, in order from an object side to an image side along an optical axis, comprises: a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, and a filter E7.
The first lens element E1 has positive power, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens element E2 has negative power, and has a concave object-side surface S3 and a concave image-side surface S4. The third lens element E3 has positive 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 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. Filter E7 has an object side S13 and an image side S14. The optical imaging lens has an imaging surface S15, and light from the object passes through the respective surfaces S1 to S14 in order and is finally imaged on the imaging surface S15.
Table 9 shows example 5Wherein the unit of the radius of curvature and the thickness/distance are both millimeters (mm). Tables 10-1 and 10-2 show the high-order term coefficients A that can be used for the aspherical mirror surfaces S1 to S12 in example 54、A6、A8、A10、A12、A14、A16、A18、A20、A22、A24、A26And A28Wherein each aspherical surface shape can be defined by the formula (1) given in the above-described embodiment 1.
Figure BDA0003191731040000141
TABLE 9
Flour mark A4 A6 A8 A10 A12 A14 A16
S1 -2.6527E-02 -9.7342E-03 -4.1825E-03 -1.5764E-03 -5.2272E-04 -1.4920E-04 -3.5439E-05
S2 -4.6537E-02 -2.6881E-03 -1.4333E-03 -1.8211E-04 1.6737E-05 1.7958E-05 1.7225E-05
S3 2.4784E-02 1.4577E-02 1.8396E-04 6.5013E-04 1.5114E-04 3.1044E-05 2.1379E-05
S4 6.3172E-02 1.4345E-02 1.3553E-03 6.7101E-04 2.0685E-04 6.2937E-05 2.5262E-05
S5 -8.5809E-02 -7.7469E-04 -3.4233E-04 2.4232E-04 9.2696E-05 6.0004E-05 1.8303E-05
S6 -1.7843E-01 1.9988E-03 2.5543E-03 2.4561E-03 1.2109E-03 5.8934E-04 1.7809E-04
S7 -3.7080E-01 2.7829E-03 -1.1401E-02 -2.9308E-03 2.1386E-03 2.8122E-03 1.3031E-03
S8 -4.2028E-01 1.1565E-01 -2.8671E-02 -8.4548E-03 4.8827E-03 1.4663E-03 -1.2193E-03
S9 -1.3572E+00 2.5215E-01 3.7514E-02 -4.2217E-02 1.1674E-02 3.2830E-03 -3.4247E-03
S10 -1.5769E+00 1.2943E-02 5.9418E-02 4.6875E-03 -2.0501E-04 4.0304E-03 -1.8781E-03
S11 -3.8188E+00 1.1826E+00 -3.5583E-01 1.0419E-01 -5.7372E-02 3.2822E-02 -9.8667E-03
S12 -6.7400E+00 1.2730E+00 -3.1426E-01 1.4518E-01 -6.7546E-02 1.5964E-02 -1.4444E-02
TABLE 10-1
Figure BDA0003191731040000142
Figure BDA0003191731040000151
TABLE 10-2
Fig. 10A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 5, which represents the 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 of embodiment 5. Fig. 10C shows a distortion curve of the optical imaging lens of embodiment 5, which represents distortion magnitude values corresponding to different image heights. Fig. 10D shows a chromatic aberration of magnification curve of the optical imaging lens of embodiment 5, which represents a deviation of different image heights on the imaging surface after light passes through the lens. As can be seen from fig. 10A to 10D, the optical imaging lens according to embodiment 5 can achieve good imaging quality.
Example 6
An optical imaging lens according to embodiment 6 of the present application is described below with reference to fig. 11 to 12D. Fig. 11 shows a schematic structural view of an optical imaging lens according to embodiment 6 of the present application.
As shown in fig. 11, the optical imaging lens, in order from an object side to an image side along an optical axis, comprises: a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, and a filter E7.
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 positive power, and has a convex object-side surface S5 and a convex 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 optical imaging lens has an imaging surface S15, and light from the object passes through the respective surfaces S1 to S14 in order and is finally imaged on the imaging surface S15.
Table 11 shows basic parameters of the optical imaging lens of embodiment 6, in which the unit of the radius of curvature and the thickness/distance are both millimeters (mm). Tables 12-1 and 12-2 show the high-order term coefficients A that can be used for the aspherical mirror surfaces S1 to S12 in example 64、A6、A8、A10、A12、A14、A16、A18、A20、A22、A24、A26、A28And A30Wherein each aspherical surface shape can be defined by the formula (1) given in the above-described embodiment 1.
Figure BDA0003191731040000152
Figure BDA0003191731040000161
TABLE 11
Flour mark A4 A6 A8 A10 A12 A14 A16
S1 5.6615E-03 -2.5807E-03 -2.2160E-03 -1.0476E-03 -3.6214E-04 -1.2186E-04 -2.7400E-05
S2 -6.6906E-02 2.0854E-03 -1.6195E-03 -1.2190E-04 -5.2554E-06 -1.7742E-05 -1.5109E-05
S3 -1.6115E-02 1.5461E-02 -2.1978E-04 6.1714E-04 1.2984E-04 -2.0328E-05 -6.8524E-06
S4 3.5749E-02 1.3031E-02 1.2854E-03 7.2508E-04 2.2406E-04 6.6295E-05 1.6144E-05
S5 -1.7174E-01 -1.3062E-02 -8.3868E-04 5.8944E-04 4.2277E-04 2.1979E-04 1.2558E-04
S6 -2.9382E-01 -1.1810E-03 6.0899E-03 3.3587E-03 1.0403E-03 5.0673E-04 1.5947E-04
S7 -5.3843E-01 1.9143E-01 -4.4468E-02 -4.9175E-03 5.7389E-03 1.7180E-03 -2.3420E-03
S8 -8.8004E-01 3.4715E-01 -9.3163E-02 -3.6914E-03 9.2843E-03 2.3212E-03 -3.9563E-03
S9 -1.4768E+00 2.5871E-01 4.9171E-02 -1.0999E-02 -2.4219E-02 7.8812E-04 8.3991E-03
S10 2.8022E-01 4.6251E-02 -2.3648E-03 8.5463E-03 -1.0472E-02 2.0887E-03 2.4053E-03
S11 -2.1354E+00 1.1561E+00 -5.6449E-01 2.6817E-01 -1.2474E-01 5.3139E-02 -2.6492E-02
S12 -6.7309E+00 1.4950E+00 -4.1985E-01 2.6062E-01 -1.2412E-01 4.6330E-02 -3.6892E-02
TABLE 12-1
Flour mark A18 A20 A22 A24 A26 A28 A30
S1 -1.1758E-05 9.5129E-07 -2.5747E-06 3.7898E-06 2.9373E-06 2.4750E-06 -2.3196E-06
S2 -5.5028E-06 -5.8628E-06 4.6012E-07 2.4899E-07 4.7309E-06 3.1506E-06 2.2616E-06
S3 -1.0395E-05 -1.4054E-06 -4.1889E-06 -3.5292E-06 -2.7404E-06 1.9064E-06 2.3467E-07
S4 5.1757E-06 -2.5377E-06 8.3013E-07 2.7050E-06 6.1962E-06 2.2560E-06 -1.8958E-07
S5 5.2570E-05 3.4314E-05 7.5619E-06 5.5325E-06 -5.7676E-06 -3.4668E-06 -4.6598E-06
S6 2.4232E-05 -4.6384E-06 -2.0726E-05 -7.9841E-06 -1.4505E-05 -6.5177E-06 -8.0552E-06
S7 3.9029E-04 4.4389E-04 -1.7572E-04 -6.2451E-05 5.1768E-05 2.0889E-07 -2.7717E-05
S8 8.9726E-04 7.5272E-04 -3.7406E-04 -1.4741E-04 1.3144E-04 2.3585E-05 -5.1689E-05
S9 1.0622E-03 -1.8996E-03 -9.7721E-04 3.1773E-04 2.8677E-04 8.8837E-06 -5.7064E-05
S10 -2.3251E-03 4.6444E-04 5.8547E-04 2.8289E-05 -4.4787E-05 -5.6202E-05 -2.9564E-07
S11 1.3915E-02 -5.8380E-03 2.0822E-03 4.2117E-04 -5.4720E-04 5.3056E-04 -8.1476E-05
S12 1.3570E-02 -5.6794E-03 5.0239E-03 -5.4164E-04 2.0100E-03 3.4499E-04 6.9138E-04
TABLE 12-2
Fig. 12A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 6, which represents the 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 of embodiment 6. Fig. 12C shows a distortion curve of the optical imaging lens of embodiment 6, which represents distortion magnitude values corresponding to different image heights. Fig. 12D shows a chromatic aberration of magnification curve of the optical imaging lens of embodiment 6, which represents a deviation of different image heights on the imaging surface after light passes through the lens. As can be seen from fig. 12A to 12D, the optical imaging lens according to embodiment 6 can achieve good imaging quality.
Further, in embodiments 1 to 6, data of the distance TTL along the optical axis from the object side surface of the first lens of the optical imaging lens to the imaging surface of the optical imaging lens, the half ImgH of the diagonal length of the effective pixel area on the imaging surface of the optical imaging lens, the half Semi-FOV of the maximum angle of view of the optical imaging lens, the f-number Fno of the optical imaging lens, the effective focal length f of the optical imaging lens, and the focal length values f1 to f6 of the respective lenses are as shown in table 13.
Figure BDA0003191731040000162
Figure BDA0003191731040000171
Table 13 each of the conditional expressions in example 1 to example 6 satisfies the condition shown in table 14.
Conditions/examples 1 2 3 4 5 6
TTL/(ImgH/tan(Semi-FOV)) 1.17 1.17 1.15 1.22 1.21 1.22
f2/EPD -4.96 -4.98 -4.27 -4.79 -4.83 -4.53
DT32/T12 1.08 1.08 1.03 1.05 1.08 1.09
DT31/DT21 0.93 0.93 0.92 0.90 0.93 0.95
f1/f 0.81 0.81 0.85 0.79 0.79 0.86
CT6/CT5 0.96 1.03 0.54 1.03 0.99 0.54
DT22/DT42 0.54 0.53 0.53 0.57 0.57 0.52
f3/∣R5+R6∣ 1.28 0.47 1.65 0.35 1.73 0.14
SAG61/SAG62 0.70 0.72 0.99 0.87 0.89 0.96
ET1/CT1 0.34 0.34 0.31 0.33 0.33 0.34
R12/R11 0.58 0.58 0.12 0.57 0.55 0.08
(ET6-ET5)/(ET6+ET5) 0.07 0.23 0.25 0.45 0.38 0.08
CT5/(T45+T56) 0.76 0.77 0.74 0.65 0.70 0.54
T12/∑AT 0.11 0.11 0.07 0.10 0.10 0.06
TABLE 14
The present application also provides an imaging Device, which is provided with an electron sensing element to form an image, wherein the electron sensing element may be a Charge Coupled Device (CCD) or a Complementary Metal Oxide Semiconductor (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 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 a person skilled in the art that the scope of protection covered by the present application is not limited to the embodiments with a specific combination of the features described above, but also covers other embodiments with any combination of the features described above or their equivalents without departing from the scope of the present application. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.

Claims (26)

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 positive optical power;
a second lens having a negative optical power;
a third lens having a positive refractive power, an object-side surface of which is convex;
a fourth lens having an optical power;
a fifth lens having optical power; and
a sixth lens having a refractive power, the object-side surface of which is convex,
the optical imaging lens satisfies:
TTL/(ImgH/tan(Semi-FOV))＜1.25；
-6 < f2/EPD < -3; and
0.5＜f1/f＜1，
wherein, TTL is a distance along the optical axis from an object side surface of the first lens element to an imaging surface of the optical imaging lens, ImgH is a half of a diagonal length of an effective pixel area on the imaging surface, Semi-FOV is a half of a maximum field angle of the optical imaging lens, f2 is an effective focal length of the second lens element, EPD is an entrance pupil diameter of the optical imaging lens, f1 is an effective focal length of the first lens element, and f is an effective focal length of the optical imaging lens.
2. 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＞5。
3. the optical imaging lens of claim 1, wherein the maximum effective radius DT22 of the image side surface of the second lens and the maximum effective radius DT42 of the image side surface of the fourth lens satisfy:
0＜DT22/DT42≤0.57。
4. the optical imaging lens of claim 1, wherein the maximum effective radius DT31 of the object side surface of the third lens and the maximum effective radius DT21 of the object side surface of the second lens satisfy:
0.8＜DT31/DT21＜1。
5. the optical imaging lens of claim 1, wherein a maximum effective radius DT32 of an image side surface of the third lens is spaced from the first and second lenses by a distance T12 on the optical axis, which satisfies:
1＜DT32/T12＜1.2。
6. the optical imaging lens of claim 1, wherein the edge thickness ET1 of the first lens and the center thickness CT1 of the first lens on the optical axis satisfy:
0＜ET1/CT1＜0.5。
7. the optical imaging lens of claim 1, wherein the edge thickness ET6 of the sixth lens and the edge thickness ET5 of the fifth lens satisfy:
0＜(ET6-ET5)/(ET6+ET5)≤0.45。
8. the optical imaging lens according to any one of claims 1 to 7, wherein a central thickness CT6 of the sixth lens on the optical axis and a central thickness CT5 of the fifth lens on the optical axis satisfy:
0＜CT6/CT5≤1.03。
9. the optical imaging lens according to any one of claims 1 to 7, wherein a curvature radius R12 of an image side surface of the sixth lens and a curvature radius R11 of an object side surface of the sixth lens satisfy:
0＜R12/R11＜1。
10. the optical imaging lens according to any one of claims 1 to 7, wherein a center thickness CT5 of the fifth lens on the optical axis, a separation distance T45 of the fourth lens and the fifth lens on the optical axis, and a separation distance T56 of the fifth lens and the sixth lens on the optical axis satisfy:
0.3＜CT5/(T45+T56)＜0.9。
11. the optical imaging lens according to any one of claims 1 to 7, wherein a sum Σ AT of a separation distance T12 on the optical axis of the first lens and the second lens and a separation distance on the optical axis between any adjacent two lenses of the first lens to the fourth lens satisfies:
0＜T12/∑AT＜0.2。
12. the optical imaging lens according to any one of claims 1 to 7, wherein an on-axis distance from an intersection point of an object-side surface and an optical axis of the sixth lens to an effective radius vertex of the object-side surface of the sixth lens, SAG61, and an intersection point of an image-side surface and an optical axis of the sixth lens to an effective radius vertex of an image-side surface of the sixth lens, SAG62 satisfy:
0.5＜SAG61/SAG62＜1。
13. the optical imaging lens according to any one of claims 1 to 7, wherein an effective focal length f3 of the third lens, a radius of curvature R5 of an object side surface of the third lens, and a radius of curvature R6 of an image side surface of the third lens satisfy:
0＜f3/∣R5+R6∣＜2。
14. 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 positive optical power;
a second lens having a negative optical power;
a third lens having a positive refractive power, an object-side surface of which is convex;
a fourth lens having an optical power;
a fifth lens having optical power; and
a sixth lens having a refractive power, the object-side surface of which is convex,
the optical imaging lens satisfies:
TTL/(ImgH/tan(Semi-FOV))＜1.25；
ImgH > 5; and
0.5＜f1/f＜1，
wherein, TTL is a distance along the optical axis from an object side surface of the first lens element to an imaging surface of the optical imaging lens, ImgH is a half of a diagonal length of an effective pixel area on the imaging surface, Semi-FOV is a half of a maximum field angle of the optical imaging lens, f1 is an effective focal length of the first lens element, and f is an effective focal length of the optical imaging lens.
15. The optical imaging lens of claim 14, wherein the maximum effective radius DT22 of the image side surface of the second lens and the maximum effective radius DT42 of the image side surface of the fourth lens satisfy:
0＜DT22/DT42≤0.57。
16. the optical imaging lens of claim 15, wherein the effective focal length f2 of the second lens and the entrance pupil diameter EPD of the optical imaging lens satisfy:
-6＜f2/EPD＜-3。
17. the optical imaging lens of claim 14, wherein the maximum effective radius DT31 of the object side surface of the third lens and the maximum effective radius DT21 of the object side surface of the second lens satisfy:
0.8＜DT31/DT21＜1。
18. the optical imaging lens of claim 14, wherein the maximum effective radius DT32 of the image side surface of the third lens is spaced from the first and second lenses by a distance T12 on the optical axis, which satisfies:
1＜DT32/T12＜1.2。
19. the optical imaging lens of claim 14, wherein the edge thickness ET1 of the first lens and the center thickness CT1 of the first lens on the optical axis satisfy:
0＜ET1/CT1＜0.5。
20. the optical imaging lens of claim 14, wherein the edge thickness ET6 of the sixth lens and the edge thickness ET5 of the fifth lens satisfy:
0＜(ET6-ET5)/(ET6+ET5)≤0.45。
21. the optical imaging lens according to any one of claims 14 to 20, wherein a central thickness CT6 of the sixth lens on the optical axis and a central thickness CT5 of the fifth lens on the optical axis satisfy:
0＜CT6/CT5≤1.03。
22. the optical imaging lens according to any one of claims 14 to 20, wherein a curvature radius R12 of an image side surface of the sixth lens and a curvature radius R11 of an object side surface of the sixth lens satisfy:
0＜R12/R11＜1。
23. the optical imaging lens according to any one of claims 14 to 20, wherein a center thickness CT5 of the fifth lens on the optical axis, a separation distance T45 of the fourth lens and the fifth lens on the optical axis, and a separation distance T56 of the fifth lens and the sixth lens on the optical axis satisfy:
0.3＜CT5/(T45+T56)＜0.9。
24. the optical imaging lens according to any one of claims 14 to 20, wherein a sum Σ AT of a separation distance T12 on the optical axis of the first lens and the second lens and a separation distance on the optical axis between any adjacent two lenses of the first lens to the fourth lens satisfies:
0＜T12/∑AT＜0.2。
25. the optical imaging lens according to any one of claims 14 to 20, wherein an on-axis distance from an intersection point of an object-side surface and an optical axis of the sixth lens to an effective radius vertex of the object-side surface of the sixth lens, SAG61, and an intersection point of an image-side surface and an optical axis of the sixth lens to an effective radius vertex of an image-side surface of the sixth lens, SAG62 satisfy:
0.5＜SAG61/SAG62＜1。
26. the optical imaging lens according to any one of claims 14 to 20, wherein an effective focal length f3 of the third lens, a radius of curvature R5 of an object side surface of the third lens, and a radius of curvature R6 of an image side surface of the third lens satisfy:
0＜f3/∣R5+R6∣＜2。
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