CN214174728U - Optical imaging lens - Google Patents
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- CN214174728U CN214174728U CN202120396589.7U CN202120396589U CN214174728U CN 214174728 U CN214174728 U CN 214174728U CN 202120396589 U CN202120396589 U CN 202120396589U CN 214174728 U CN214174728 U CN 214174728U
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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 positive optical power; a third lens with negative focal power, the image side surface of which is concave; a fourth lens with focal power, wherein the image side surface of the fourth lens is convex; a fifth lens having optical power; a sixth lens having optical power; and a seventh lens having a negative optical power. The distance TTL between the object side surface of the first lens and the imaging surface of the optical imaging lens on the optical axis and the entrance pupil diameter EPD of the optical imaging lens meet the following requirements: TTL/EPD is less than 1.6. The curvature radius R3 of the object side surface of the second lens and the curvature radius R6 of the image side surface of the third lens meet the following conditions: 1 < R3/R6 < 1.5. The distance T45 between the fourth lens and the fifth lens on the optical axis and the central thickness CT4 of the fourth lens on the optical axis satisfy: 0.9 < T45/CT4 < 1.3.
Description
Technical Field
The present application relates to the field of optical elements, and more particularly, to an optical imaging lens.
Background
In recent years, with the higher and higher requirements of the mobile phone photographing function in the market, higher standards are provided for the zoom capability and the long-range imaging capability of the mobile phone lens.
In general, a telephoto lens has a long total optical length. When a telephoto lens is provided in a portable device such as a mobile phone, the size of the telephoto lens is too long, which is not advantageous for thinning the mobile phone. In addition, the existing mobile phone lens is limited by the focal length of the mobile phone lens, so that the clear imaging effect is difficult to realize.
Therefore, in view of the above problems, it is desirable to provide an optical imaging lens having features such as long focus, thin thickness, and large aperture to effectively improve the image quality and satisfy the feature of thin portable electronic devices such as mobile phones.
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 positive optical power; a third lens with negative focal power, the image side surface of which is concave; a fourth lens with focal power, wherein the image side surface of the fourth lens is convex; a fifth lens having optical power; a sixth lens having optical power; and a seventh lens having a negative optical power. The distance TTL between the object side surface of the first lens and the imaging surface of the optical imaging lens on the optical axis and the entrance pupil diameter EPD of the optical imaging lens can satisfy the following conditions: TTL/EPD is less than 1.6. The curvature radius R3 of the object side surface of the second lens and the curvature radius R6 of the image side surface of the third lens can satisfy the following conditions: 1 < R3/R6 < 1.5. The distance T45 between the fourth lens and the fifth lens on the optical axis and the central thickness CT4 of the fourth lens on the optical axis can satisfy: 0.9 < T45/CT4 < 1.3.
In some embodiments, the effective focal length f2 of the second lens and the effective focal length f3 of the third lens may satisfy: 0.5 < f2/f3 < 1.
In some embodiments, the effective focal length f1 of the first lens, the effective focal length f2 of the second lens, and the effective focal length f3 of the third lens may satisfy: 1 < f1/(f2-f3) < 1.5.
In some embodiments, the effective focal length f1 of the first lens and the effective focal length f of the optical imaging lens may satisfy: 2< f1/f < 2.5.
In some embodiments, the radius of curvature R14 of the image-side surface of the seventh lens and the effective focal length f7 of the seventh lens may satisfy: -1 < R14/f7 < -0.5.
In some embodiments, the central thickness CT1 of the first lens on the optical axis and the central thickness CT2 of the second lens on the optical axis may satisfy: 0< CT1/CT 2< 1.
In some embodiments, the maximum effective radius DT11 of the object-side surface of the first lens and the maximum effective radius DT72 of the image-side surface of the seventh lens may satisfy: 0.7 < DT11/DT72 < 1.
In some embodiments, the maximum effective radius DT11 of the object side surface of the first lens and the half ImgH of the diagonal length of the effective pixel area on the imaging surface of the optical imaging lens may satisfy: 0.5 < DT11/ImgH < 1.
In some embodiments, the maximum effective radius DT32 of the image-side surface of the third lens, the maximum effective radius DT41 of the object-side surface of the fourth lens, and the maximum effective radius DT51 of the object-side surface of the fifth lens may satisfy: 0.5 < (DT32-DT41)/(DT41-DT51) < 1.1.
In some embodiments, the maximum effective radius DT12 of the image-side surface of the first lens, the maximum effective radius DT21 of the object-side surface of the second lens, the maximum effective radius DT22 of the image-side surface of the second lens, and the maximum effective radius DT31 of the object-side surface of the third lens may satisfy: 0< (DT12-DT21)/(DT22-DT31) < 1.
In some embodiments, an on-axis distance SAG72 from 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 and an on-axis distance SAG11 from an intersection point of an object-side surface of the first lens and the optical axis to an effective radius vertex of the object-side surface of the first lens may satisfy: -0.7 < SAG72/SAG11 < -0.2.
In some embodiments, an on-axis distance SAG41 from an intersection of an object-side surface of the fourth lens and the optical axis to an effective radius vertex of the object-side surface of the fourth lens and an on-axis distance SAG52 from an intersection 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 may satisfy: -1 < SAG41/SAG52 < -0.3.
In some embodiments, an on-axis distance SAG41 from an intersection of an object-side surface of the fourth lens and the optical axis to an effective radius vertex of the object-side surface of the fourth lens and a center thickness CT4 of the fourth lens on the optical axis may satisfy: 0.3 < SAG41/CT4 < 0.9.
In some embodiments, an on-axis distance SAG32 from an intersection point of an image-side surface of the third lens and the optical axis to an effective radius vertex of the image-side surface of the third lens and a separation distance T34 of the third lens and the fourth lens on the optical axis may satisfy: 0.8 < SAG32/T34 < 1.2.
In some embodiments, the central thickness CT6 of the sixth lens on the optical axis and the edge thickness ET6 of the sixth lens at the maximum effective radius may satisfy: 1 < CT6/ET6 < 1.5.
In some embodiments, an on-axis distance SAG61 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 an on-axis distance SAG62 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 may satisfy: 0.5 < SAG61/SAG62 < 1.
In some embodiments, the optical imaging lens further includes a prism disposed on an object side of the first lens.
The optical imaging lens adopts a seven-piece lens framework, and is favorable for enabling the optical imaging lens to have the characteristics of long focus, thinning, large aperture and the like through reasonable distribution of focal power and optimal selection of surface type and thickness, and the imaging quality can be effectively improved.
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 2C show an axial chromatic aberration curve, an astigmatism curve, and a distortion curve of the optical imaging lens of embodiment 1, respectively;
fig. 3 is a schematic structural view showing an optical imaging lens according to embodiment 2 of the present application;
fig. 4A to 4C show an axial chromatic aberration curve, an astigmatism curve, and a distortion curve of the optical imaging lens of embodiment 2, respectively;
fig. 5 is a schematic structural view showing an optical imaging lens according to embodiment 3 of the present application;
fig. 6A to 6C show an axial chromatic aberration curve, an astigmatism curve, and a distortion curve of the optical imaging lens of embodiment 3, respectively;
fig. 7 is a schematic structural view showing an optical imaging lens according to embodiment 4 of the present application;
fig. 8A to 8C show an axial chromatic aberration curve, an astigmatism curve, and a distortion curve of the optical imaging lens of embodiment 4, respectively;
fig. 9 is a schematic structural view showing an optical imaging lens according to embodiment 5 of the present application;
fig. 10A to 10C show an axial chromatic aberration curve, an astigmatism curve, and a distortion curve of the optical imaging lens of embodiment 5, respectively;
fig. 11 is a schematic structural view showing an optical imaging lens according to embodiment 6 of the present application; and
fig. 12A to 12C show an axial chromatic aberration curve, an astigmatism curve, and a distortion curve of the optical imaging lens of embodiment 6, respectively.
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, seven lenses having optical powers, i.e., a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens. The seven lenses are arranged in sequence 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 positive optical power; the third lens may have a negative optical power, and the image-side surface thereof may be concave; the fourth lens has positive focal power or negative focal power, and the image side surface of the fourth lens can be a convex surface; the fifth lens has positive focal power or negative focal power; the sixth lens has positive focal power or negative focal power; and the seventh lens may have a negative optical power. The whole lens that has according to this application is ultra-thin big light ring structure, can increase the light inlet quantity of camera lens to improve the whole illuminance of camera lens.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy a conditional expression TTL/EPD < 1.6, where TTL is a distance along an optical axis from an object-side surface of the first lens element to an imaging surface of the optical imaging lens, and EPD is an entrance pupil diameter of the optical imaging lens. By controlling the on-axis distance from the object side surface of the first lens to the imaging surface of the optical imaging lens and the entrance pupil diameter of the optical imaging lens to meet the condition that TTL/EPD is less than 1.6, the optical imaging lens can be helpful for shooting objects with long distance and some details of the objects, namely, the long-focus characteristic of the optical imaging lens is guaranteed. More specifically, TTL and EPD can satisfy 1.4 < TTL/EPD < 1.5.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression 2< f1/f <2.5, where f1 is an effective focal length of the first lens, and f is an effective focal length of the optical imaging lens. The ratio of the effective focal length of the first lens to the effective focal length of the optical imaging lens is restricted in the range, so that the first lens has reasonable focal power, aberration can be well corrected, and the length of the whole optical imaging lens is shortened.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression 0< (R8-R7)/(R8+ R7) <0.5, where R8 is a radius of curvature of an image-side surface of the fourth lens and R7 is a radius of curvature of an object-side surface of the fourth lens. By reasonably controlling the curvature radius of the image side surface of the fourth lens and the curvature radius of the object side surface of the fourth lens, the deflection angle of light rays at the fourth lens can be controlled, and further the sensitivity of the whole optical system can be effectively reduced.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression 0.5 < f2/f3 < 1, where f2 is an effective focal length of the second lens and f3 is an effective focal length of the third lens. Through rationally distributing the focal power of second lens and third lens, restrain the effective focal length of second lens and the effective focal length's of third lens ratio in this scope, can be favorable to sharing the big visual field of object space to off-axis aberration that follow-up lens produced that can be fine correction, thereby promote whole optical system's imaging quality. More specifically, f2 and f3 may satisfy 0.7 < f2/f3 < 1.0.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression 1 < f1/(f2-f3) < 1.5, where f1 is an effective focal length of the first lens, f2 is an effective focal length of the second lens, and f3 is an effective focal length of the third lens. By restricting the ratio of the effective focal length of the first lens to the difference between the effective focal lengths of the second lens and the third lens within this range, the imaging quality of the entire optical imaging lens can be improved and the sensitivity of the system can be reduced.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression 1 < R3/R6 < 1.5, where R3 is a radius of curvature of an object-side surface of the second lens and R6 is a radius of curvature of an image-side surface of the third lens. By controlling the ratio of the curvature radius of the object side surface of the second lens element to the curvature radius of the image side surface of the third lens element within the range, the height of the imaging surface of the optical system can be increased, the optical system can have a wider imaging range, and the processing manufacturability of the second lens element and the third lens element can be improved.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression-1 < R14/f7 < -0.5, where R14 is a radius of curvature of an image-side surface of the seventh lens and f7 is an effective focal length of the seventh lens. By controlling the ratio of the curvature radius of the image side surface of the seventh lens to the effective focal length of the seventh lens within the range, the deflection angle of the marginal ray at the seventh lens can be effectively controlled, thereby reducing the sensitivity of the whole optical system.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression 0< CT1/CT 2< 1, where CT1 is a central thickness of the first lens on an optical axis and CT2 is a central thickness of the second lens on the optical axis. By controlling the ratio of the central thickness of the first lens on the optical axis to the central thickness of the second lens on the optical axis within the range, the sensitivity of the lens can be effectively reduced, the field curvature can be corrected, and a better imaging effect can be realized. More specifically, CT1 and CT2 may satisfy 0.5 < CT1/CT 2< 0.8.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression 0.9 < T45/CT4 < 1.3, where T45 is a separation distance of the fourth lens and the fifth lens on the optical axis, and CT4 is a center thickness of the fourth lens on the optical axis. By controlling the ratio of the on-axis distance between the fourth lens and the fifth lens to the central thickness of the fourth lens on the optical axis within the range, the thickness sensitivity of the lens can be effectively reduced, and further the field curvature can be effectively corrected.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression 0.7 < DT11/DT72 < 1, where DT11 is a maximum effective radius of an object-side surface of the first lens and DT72 is a maximum effective radius of an image-side surface of the seventh lens. By controlling the ratio of the maximum effective radius of the object side surface of the first lens to the maximum effective radius of the image side surface of the seventh lens within the range, the light flux of the lens can be effectively increased, the relative illumination of the edge field of view is improved, and the optical system has good imaging quality in a dark environment.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression 0.5 < DT11/ImgH < 1, where DT11 is the maximum effective radius of the object side surface of the first lens, and ImgH is half the diagonal length of the effective pixel area on the imaging surface of the optical imaging lens. By controlling the ratio of the maximum effective radius of the object side surface of the first lens to half of the diagonal length of the effective pixel area on the imaging surface of the optical imaging lens within the range, the size of the system can be effectively reduced, the system is ensured to be compact, and the ultrathin characteristic of the lens is realized. More specifically, DT11 and ImgH may satisfy 0.7 < DT11/ImgH < 0.9.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression 0.5 < (DT32-DT41)/(DT41-DT51) < 1.1, where DT32 is the maximum effective radius of the image-side surface of the third lens, DT41 is the maximum effective radius of the object-side surface of the fourth lens, and DT51 is the maximum effective radius of the object-side surface of the fifth lens. By controlling the ratio of the difference between the maximum effective radius of the image-side surface of the third lens and the maximum effective radius of the object-side surface of the fourth lens to the difference between the maximum effective radius of the object-side surface of the fourth lens and the maximum effective radius of the object-side surface of the fifth lens within the range, the relative brightness of the optical system can be improved to a certain extent, and the optical system can have a good imaging result in a dark environment.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression 0< (DT12-DT21)/(DT22-DT31) < 1, where DT12 is a maximum effective radius of an image-side surface of the first lens, DT21 is a maximum effective radius of an object-side surface of the second lens, DT22 is a maximum effective radius of an image-side surface of the second lens, and DT31 is a maximum effective radius of an object-side surface of the third lens. The ratio of the difference value of the maximum effective radius of the image side surface of the first lens and the maximum effective radius of the object side surface of the second lens to the difference value of the maximum effective radius of the image side surface of the second lens and the maximum effective radius of the object side surface of the third lens is controlled to be in the range, so that the light transmission amount of the whole optical system can be increased, the integral illumination of the optical imaging lens is improved, and the imaging effect is improved. More specifically, DT12, DT21, DT22 and DT31 may satisfy 0.1 < (DT12-DT21)/(DT22-DT31) < 0.7.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression-0.7 < SAG72/SAG11 < -0.2, where SAG72 is an on-axis distance from 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, and SAG11 is an on-axis distance from an intersection of an object-side surface of the first lens and the optical axis to an effective radius vertex of the object-side surface of the first lens. By controlling the ratio of SAG72 to SAG11 in the range, the optical power of the whole optical system can be reasonably distributed, and the long-focus effect of the lens is improved. More specifically, SAG72 and SAG11 may satisfy-0.6 < SAG72/SAG11 < -0.3.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression-1 < SAG41/SAG52 < -0.3, where SAG41 is an on-axis distance from an intersection of an object-side surface of the fourth lens and the optical axis to an effective radius vertex of the object-side surface of the fourth lens, and SAG52 is an on-axis distance from an intersection 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. By controlling the ratio of SAG41 to SAG52 in the range, the deflection angles of the light rays on the fourth lens and the fifth lens can be controlled, the sensitivity of the whole optical system can be effectively reduced, and the yield of the system is improved. More specifically, SAG41 and SAG52 may satisfy-0.8 < SAG41/SAG52 < -0.4.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression 0.3 < SAG41/CT4 < 0.9, where SAG41 is an on-axis distance from an intersection of an object-side surface of the fourth lens and an optical axis to an effective radius vertex of the object-side surface of the fourth lens, and CT4 is a center thickness of the fourth lens. By controlling the ratio of SAG41 to CT4 in the range, the shape of the fourth lens can be reasonably controlled, the spherical aberration and the coma aberration of the whole optical system can be favorably controlled, and the imaging quality is ensured. More specifically, SAG41 and CT4 may satisfy 0.4 < SAG41/CT4 < 0.8.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression 0.8 < SAG32/T34 < 1.2, where SAG32 is an on-axis distance from an intersection of an image-side surface of the third lens and the optical axis to an effective radius vertex of the image-side surface of the third lens, and T34 is a separation distance of the third lens and the fourth lens on the optical axis. By controlling the ratio of SAG32 to T34 in the range, the main ray angle of the whole optical system is adjusted, so that the relative brightness of the optical lens is improved, and the definition of an image plane is improved. More specifically, SAG32 and T34 may satisfy 0.9 < SAG32/T34 < 1.1.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression 1 < CT6/ET6 < 1.5, where CT6 is a center thickness of the sixth lens and ET6 is an edge thickness of the sixth lens at the maximum effective radius. By controlling the ratio of the center thickness of the sixth lens to the edge thickness of the sixth lens at the maximum effective radius within this range, the thickness sensitivity of the entire optical system can be reduced, curvature of field can be corrected, and yield can be improved. More specifically, CT6 and ET6 may satisfy 1.2 < CT6/ET6 < 1.4.
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. By controlling the ratio of SAG61 to SAG62 in this range, the shape of the sixth lens can be well controlled, and the yield can be improved. Meanwhile, the success rate of coating the sixth lens is favorably improved, and the overall yield of the optical system can be ensured. More specifically, SAG61 and SAG62 may satisfy 0.5 < SAG61/SAG62 < 0.8.
In an exemplary embodiment, the optical imaging lens of the present application may further include a prism. The prism may be disposed between the subject and the first lens. By arranging the prism, the direction of the incident light can be perpendicular to the length direction of the optical imaging lens. Although in the following embodiments, only the prism is shown in embodiment 1, it should be understood by those skilled in the art that the following embodiments may each include a prism disposed between the subject and the first lens.
The periscopic telephoto lens changes a light path through a prism so that the light path of the entire optical system is folded, that is, the direction of incident light is perpendicular to the length direction of the lens. Through such setting, can guarantee that the optical length of telephoto lens is not restricted by the thickness of portable equipment, consequently for telephoto lens can have sufficient optical path length to guarantee the imaging performance of camera lens. The periscopic telephoto lens using the prism can well solve the problem that miniaturization of the portable device is not facilitated due to a long optical length of the telephoto lens.
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. Or in case a prism is provided, a diaphragm may be provided between the prism 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, seven lenses as described above. Through reasonable distribution of the focal power and the surface type of each lens, the central thickness of each lens, the on-axis distance between the lenses and the like, the optical imaging lens can be effectively ensured to have the characteristics of long focus, thinning, large aperture, high imaging quality and the like, so that the optical imaging lens can be more suitable for portable electronic products such as mobile phones and the like which are continuously developed, and the higher requirements of people on the photographing function of the electronic products such as the mobile phones and the like are met.
In the embodiment of the present application, at least one of the mirror surfaces of each lens is an aspherical mirror, that is, at least one of the object-side surface of the first lens to the image-side surface of the seventh lens is an aspherical mirror. 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 lens center to the lens periphery, an aspherical lens has a better curvature radius characteristic, and has an advantage of improving distortion aberration, that is, 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, the sixth lens, and the seventh lens is an aspheric mirror surface. Optionally, each of the first, second, third, fourth, fifth, sixth, and seventh 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 seven lenses are exemplified in the embodiment, the optical imaging lens is not limited to include seven 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 2C. 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 prism P, 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, a seventh lens E7, and a filter E8.
The prism P has an incident surface S1, a reflecting surface S2, and an exit surface S3. The first lens element E1 has positive power, and has a convex object-side surface S4 and a concave image-side surface S5. The second lens element E2 has positive power, and has a convex object-side surface S6 and a concave image-side surface S7. The third lens element E3 has negative power, and has a convex object-side surface S8 and a concave image-side surface S9. The fourth lens element E4 has positive power, and has a convex object-side surface S10 and a concave image-side surface S11. The fifth lens element E5 has positive power, and has a convex object-side surface S12 and a concave image-side surface S13. The sixth lens element E6 has negative power, and has a convex object-side surface S14 and a concave image-side surface S15. The seventh lens element E7 has negative power, and has a concave object-side surface S16 and a concave image-side surface S17. Filter E8 has an object side S18 and an image side S19. The optical imaging lens has an imaging surface S20, and light from the object passes through the respective surfaces S1 to S19 in order and is finally imaged on the imaging surface S20.
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).
TABLE 1
In embodiment 1, the object-side surface and the image-side surface of any one of the first lens E1 through the seventh lens E7 are aspheric surfaces, and the surface shape x of each aspheric lens can be defined by, but is not limited to, the following aspheric surface formula:
wherein x is the rise of the distance from the aspheric surface vertex to the aspheric surface vertex when the aspheric surface is at the position with the height of h along the optical axis direction; c is the paraxial curvature of the aspheric surface, c being 1/R (i.e., paraxial curvature c is the inverse of radius of curvature R in table 1 above); k is a conic coefficient; ai is the correction coefficient of the i-th order of the aspherical surface. Table 2 and Table 3 below show the coefficients A of the high-order terms that can be used for the aspherical mirror surfaces S4 to S17 in example 14、A6、A8、A10、A12、A14、A16、A18、A20、A22、A24、A26、A28And A30。
| Flour mark | A4 | A6 | A8 | A10 | A12 | A14 | A16 |
| S4 | 9.0910E-02 | 7.9342E-02 | 3.5978E-02 | 1.1796E-02 | 2.4671E-03 | -1.5191E-04 | -5.4799E-04 |
| S5 | 3.5042E-01 | 4.1533E-02 | 3.5553E-02 | 4.6726E-03 | 7.2742E-04 | -1.1471E-03 | -5.6059E-04 |
| S6 | 3.3430E-01 | 4.0496E-02 | 3.0082E-02 | 8.3079E-03 | 4.3771E-03 | 7.9507E-04 | -5.2361E-04 |
| S7 | 8.9740E-02 | -1.1057E-02 | 1.2435E-02 | -7.8033E-04 | 1.9011E-03 | -9.4258E-04 | 2.1865E-04 |
| S8 | 2.4887E-01 | -8.2998E-02 | 1.6875E-02 | -3.3916E-03 | 9.9904E-04 | -6.0191E-04 | 2.1858E-04 |
| S9 | 1.0006E-01 | -4.1506E-02 | -6.5249E-04 | 3.3432E-05 | 7.7947E-04 | 2.2046E-04 | 6.0834E-05 |
| S10 | 1.8761E-02 | -4.0309E-02 | -1.5649E-02 | -3.2261E-03 | -6.4901E-04 | -4.1974E-04 | -2.6120E-04 |
| S11 | 9.2541E-02 | -1.4408E-02 | -5.4696E-03 | -1.5091E-03 | -8.0333E-05 | -4.2622E-05 | -1.4367E-05 |
| S12 | 3.7972E-01 | 3.3200E-02 | 6.1188E-03 | 7.8419E-04 | 5.3305E-04 | 1.5809E-04 | 5.8632E-05 |
| S13 | 5.0758E-01 | 2.0834E-02 | 1.0150E-03 | -1.1762E-03 | -3.0052E-04 | -4.6168E-04 | -2.8707E-04 |
| S14 | 9.6777E-01 | -5.2927E-02 | -3.2522E-02 | -1.2811E-02 | -7.3273E-03 | -2.5367E-03 | 1.3664E-03 |
| S15 | 1.2421E+00 | -1.0419E-01 | 9.8069E-03 | 1.8524E-03 | -4.2526E-03 | -2.6676E-03 | -1.1465E-04 |
| S16 | 1.2981E+00 | -5.3839E-01 | 1.0695E-01 | -5.0688E-02 | 2.2211E-02 | -4.6962E-04 | -9.2144E-04 |
| S17 | 2.2359E+00 | -3.9961E-01 | 9.3397E-02 | -7.7911E-02 | 1.7232E-02 | -7.4673E-04 | 1.8907E-03 |
TABLE 2
| Flour mark | A18 | A20 | A22 | A24 | A26 | A28 | A30 |
| S4 | -3.9379E-04 | -1.8575E-04 | -5.2778E-05 | -6.3497E-06 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S5 | -3.8567E-05 | 1.7523E-04 | 1.1999E-04 | 2.6619E-05 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S6 | -6.0724E-04 | -2.6364E-04 | -4.3119E-05 | 3.4705E-06 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S7 | -4.3265E-05 | 9.8177E-05 | -2.1053E-05 | 1.1337E-05 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S8 | 4.2235E-05 | 6.8692E-05 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S9 | -6.3456E-06 | -7.7934E-06 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S10 | -1.2589E-04 | -6.3416E-05 | -2.6770E-05 | 1.5468E-05 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S11 | -1.1808E-05 | -5.7719E-06 | -6.1384E-07 | 9.4770E-07 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S12 | -5.8259E-07 | 1.3896E-06 | -6.6254E-06 | -1.1942E-07 | -1.2430E-06 | 2.6189E-06 | 0.0000E+00 |
| S13 | -1.5664E-04 | -6.4272E-05 | -3.1416E-05 | -1.3103E-05 | -8.2632E-06 | 0.0000E+00 | 0.0000E+00 |
| S14 | 1.9217E-03 | 8.2444E-04 | 6.7642E-05 | -1.5949E-04 | -1.1171E-04 | -4.3853E-05 | -7.4897E-06 |
| S15 | 1.7770E-04 | -3.1459E-04 | -2.0065E-04 | -8.5319E-05 | -4.2716E-05 | -3.4895E-06 | 1.4874E-05 |
| S16 | -9.6922E-04 | -3.6384E-04 | 5.3648E-04 | 1.6619E-04 | -1.4869E-04 | -2.0269E-05 | 1.8973E-05 |
| S17 | -2.6048E-05 | -2.2652E-04 | -1.0859E-04 | 1.2307E-04 | 7.8443E-05 | 4.3466E-05 | -2.0243E-05 |
TABLE 3
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. As can be seen from fig. 2A to 2C, 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 4C. 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, a seventh lens E7, and a filter E8.
The first lens element E1 has positive power, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens element E2 has positive power, and has a 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 concave 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 positive power, and has a concave object-side surface S11 and a convex image-side surface S12. The seventh lens element E7 has negative power, and has a concave object-side surface S13 and a concave image-side surface S14. Filter E8 has an object side S15 and an image side S16. The optical imaging lens has an imaging surface S17, and light from the object passes through the respective surfaces S1 to S16 in order and is finally imaged on the imaging surface S17.
Table 4 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 5 and 6 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 formula (1) given in example 1 above.
TABLE 4
TABLE 5
| Flour mark | A18 | A20 | A22 | A24 | A26 | A28 | A30 |
| S1 | 6.3572E-04 | 3.8893E-04 | 1.4652E-04 | 2.9243E-05 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S2 | 6.3658E-04 | 1.6826E-04 | -5.5260E-07 | -1.2155E-05 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S3 | 4.3830E-04 | 1.3015E-04 | 2.7583E-06 | -1.0703E-05 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S4 | 1.7947E-05 | 3.2248E-06 | 9.7787E-06 | 8.1530E-07 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S5 | -3.4643E-04 | -1.0349E-04 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S6 | 6.1434E-06 | 6.3684E-06 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S7 | 4.0364E-05 | 1.6920E-05 | 6.0382E-06 | 4.9881E-06 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S8 | 6.6512E-06 | 4.0252E-06 | 1.0514E-06 | -5.9455E-07 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S9 | 4.2842E-05 | 1.7194E-05 | 1.4308E-05 | 3.3222E-06 | 2.6132E-06 | -1.4769E-06 | 0.0000E+00 |
| S10 | 1.0516E-04 | 4.1360E-05 | 2.2072E-05 | 8.1094E-06 | 5.8940E-06 | 0.0000E+00 | 0.0000E+00 |
| S11 | -5.5619E-03 | -3.6878E-03 | -2.0574E-03 | -9.4787E-04 | -3.4247E-04 | -8.5758E-05 | -9.8975E-06 |
| S12 | 7.9516E-04 | -8.2269E-04 | -2.0999E-04 | 5.3081E-04 | 2.9420E-04 | 5.0787E-05 | 2.6534E-05 |
| S13 | -1.4258E-03 | -1.5766E-03 | 1.2429E-03 | 5.9727E-04 | -4.5723E-04 | -2.0435E-04 | 1.3172E-04 |
| S14 | -8.9008E-04 | -1.9126E-03 | -7.3310E-04 | -5.9573E-04 | -2.3160E-04 | -4.7824E-05 | 5.4866E-05 |
TABLE 6
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. As can be seen from fig. 4A to 4C, 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 6C. 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, a seventh lens E7, and a filter E8.
The first lens element E1 has positive power, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens element E2 has positive power, and has a convex object-side surface S3 and a convex image-side surface S4. The third lens element E3 has negative power, and has a convex object-side surface S5 and a concave image-side surface S6. The fourth lens element E4 has positive 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 positive 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 concave image-side surface S14. Filter E8 has an object side S15 and an image side S16. The optical imaging lens has an imaging surface S17, and light from the object passes through the respective surfaces S1 to S16 in order and is finally imaged on the imaging surface S17.
Table 7 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 8 and 9 show high-order term coefficients that can be used for each aspherical mirror surface in embodiment 3, wherein each aspherical mirror surface type can be defined by the formula (1) given in embodiment 1 above.
TABLE 7
| Flour mark | A4 | A6 | A8 | A10 | A12 | A14 | A16 |
| S1 | -6.9410E-02 | -3.8095E-02 | -1.4703E-02 | -7.6456E-03 | -3.6472E-03 | -1.6122E-03 | -5.6364E-04 |
| S2 | -2.5152E-01 | 6.6741E-03 | -7.0555E-03 | -6.9024E-03 | -2.7702E-03 | -1.4215E-03 | -2.7933E-04 |
| S3 | -2.8607E-01 | -4.4758E-02 | -6.7952E-03 | 8.3356E-04 | 1.6729E-03 | 3.8532E-04 | 2.3283E-04 |
| S4 | -7.8006E-02 | -1.9237E-02 | 5.3127E-03 | -1.1014E-03 | 7.0774E-04 | -1.5052E-04 | 1.6194E-04 |
| S5 | -2.0375E-01 | 5.3575E-02 | -7.6330E-03 | -2.6808E-04 | -2.4087E-05 | -8.1474E-05 | 7.5714E-05 |
| S6 | -1.1358E-01 | 5.3134E-02 | 2.4795E-04 | -5.2978E-04 | -7.4841E-04 | -3.1384E-04 | -4.0997E-05 |
| S7 | -9.2764E-03 | 4.3297E-02 | 1.4089E-02 | 1.6779E-03 | 1.7210E-04 | 1.3433E-04 | 9.6684E-05 |
| S8 | -7.7953E-02 | 1.4744E-02 | 6.8726E-03 | 1.1352E-03 | 1.5539E-04 | 6.8200E-05 | 3.9716E-05 |
| S9 | -3.2511E-01 | -3.3521E-02 | -7.3350E-03 | -1.7947E-03 | -6.9244E-04 | -7.6326E-05 | 5.5192E-05 |
| S10 | -5.9170E-01 | -7.7287E-03 | -2.7137E-03 | 2.0109E-03 | 1.9249E-03 | 1.5798E-03 | 9.0161E-04 |
| S11 | -8.2209E-01 | 5.9772E-03 | 7.6136E-03 | 3.0638E-03 | 2.9988E-03 | 1.5493E-03 | 4.3409E-04 |
| S12 | -1.0537E+00 | 2.7962E-02 | 7.4031E-03 | -4.8293E-03 | 4.1148E-03 | 7.8520E-04 | 1.5151E-03 |
| S13 | -8.6567E-01 | 4.7896E-01 | -1.3035E-01 | 4.9091E-02 | -1.5819E-02 | 8.3454E-03 | -1.9203E-03 |
| S14 | -2.2860E+00 | 3.6025E-01 | -1.5999E-01 | 4.6301E-02 | -2.5687E-02 | 4.2984E-03 | -3.2694E-03 |
TABLE 8
TABLE 9
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. As can be seen from fig. 6A to 6C, 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 8C. 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, a seventh lens E7, and a filter E8.
The first lens element E1 has positive power, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens element E2 has positive power, and has a convex object-side surface S3 and a convex image-side surface S4. The third lens element E3 has negative power, and has a convex object-side surface S5 and a concave image-side surface S6. The fourth lens element E4 has positive 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 concave image-side surface S10. The sixth lens element E6 has positive power, and has a convex object-side surface S11 and a convex image-side surface S12. The seventh lens element E7 has negative power, and has a concave object-side surface S13 and a concave image-side surface S14. Filter E8 has an object side S15 and an image side S16. The optical imaging lens has an imaging surface S17, and light from the object passes through the respective surfaces S1 to S16 in order and is finally imaged on the imaging surface S17.
Table 10 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 11 and 12 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.
| Flour mark | A4 | A6 | A8 | A10 | A12 | A14 | A16 |
| S1 | -1.1939E-01 | -7.5820E-02 | -3.0107E-02 | -1.1093E-02 | -3.5750E-03 | -8.4048E-04 | 1.8938E-05 |
| S2 | -3.4969E-01 | -4.1169E-02 | -1.7846E-02 | -8.1117E-03 | -1.9815E-03 | -8.0074E-05 | 3.0689E-04 |
| S3 | -3.7408E-01 | -5.4430E-02 | -5.5752E-03 | -1.7276E-03 | -4.9871E-04 | 1.7874E-04 | 3.9229E-04 |
| S4 | -9.6097E-02 | -9.7021E-03 | 2.7715E-03 | -1.3909E-03 | 6.2652E-04 | 6.1573E-05 | 1.6300E-04 |
| S5 | -2.4059E-01 | 7.1279E-02 | -1.7695E-02 | 1.2164E-03 | -3.4654E-04 | -7.1214E-04 | -5.7807E-04 |
| S6 | -1.0420E-01 | 4.2768E-02 | 1.5319E-03 | 3.3629E-04 | -3.7359E-04 | -2.1625E-04 | -4.6943E-05 |
| S7 | -1.2146E-02 | 3.4713E-02 | 1.3282E-02 | 1.6520E-03 | 5.8575E-05 | 4.1365E-05 | 5.4935E-05 |
| S8 | -6.6470E-02 | 9.5802E-03 | 5.4871E-03 | 6.9130E-04 | -5.2696E-05 | -1.0370E-05 | -4.0462E-07 |
| S9 | -3.1017E-01 | -2.2881E-02 | -4.1025E-03 | -7.1454E-04 | -4.4749E-04 | -3.1301E-05 | 1.3851E-05 |
| S10 | -5.0970E-01 | 5.1262E-04 | -1.9885E-03 | 3.6417E-04 | 1.0416E-04 | 2.8107E-04 | 1.3437E-04 |
| S11 | -8.8883E-01 | 4.2651E-02 | 2.9296E-02 | 1.7863E-02 | 7.5374E-03 | -1.4348E-03 | -5.0660E-03 |
| S12 | -8.5975E-01 | 1.8553E-02 | 6.1785E-03 | -2.3701E-03 | 3.3391E-03 | 5.7426E-04 | 1.8364E-03 |
| S13 | -1.1475E+00 | 4.9769E-01 | -1.0316E-01 | 3.5492E-02 | -1.4869E-02 | 5.4819E-03 | 1.6598E-05 |
| S14 | -2.3146E+00 | 3.0779E-01 | -1.2201E-01 | 4.3015E-02 | -1.9951E-02 | 3.2378E-03 | -2.6832E-03 |
TABLE 11
| Flour mark | A18 | A20 | A22 | A24 | A26 | A28 | A30 |
| S1 | 1.8578E-04 | 1.2724E-04 | 4.9860E-05 | 1.0745E-05 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S2 | 1.9827E-04 | 5.1806E-05 | 8.5744E-07 | -2.5502E-06 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S3 | 2.5839E-04 | 8.5047E-05 | 1.1280E-05 | -1.0860E-06 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S4 | -1.5021E-05 | 1.3452E-05 | 6.3625E-06 | 1.9795E-06 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S5 | -3.6586E-04 | -8.3714E-05 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S6 | 3.4556E-06 | 6.1275E-06 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S7 | 2.6716E-05 | 1.1412E-05 | 3.1726E-06 | 4.6450E-06 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S8 | 1.7009E-06 | 3.2426E-06 | 8.2911E-07 | -1.7408E-07 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S9 | 2.9407E-05 | 6.0875E-06 | 1.0532E-05 | 1.3940E-06 | 3.3433E-06 | -1.6192E-06 | 0.0000E+00 |
| S10 | 5.6718E-05 | 1.6347E-05 | 9.6521E-06 | 2.1078E-06 | 4.7073E-06 | 0.0000E+00 | 0.0000E+00 |
| S11 | -4.9132E-03 | -3.4844E-03 | -2.0928E-03 | -1.0608E-03 | -4.3857E-04 | -1.3620E-04 | -2.4262E-05 |
| S12 | 7.3232E-04 | -1.5790E-04 | -1.5012E-04 | 2.0521E-04 | 1.5416E-04 | 3.4709E-05 | 2.2923E-05 |
| S13 | -7.7522E-04 | -8.7913E-04 | 6.1963E-04 | 3.7694E-04 | -2.0962E-04 | -1.5077E-04 | 7.6529E-05 |
| S14 | -2.0256E-04 | -9.3314E-04 | -3.0222E-04 | -3.0341E-04 | -1.2472E-04 | -6.2422E-05 | 1.3587E-05 |
TABLE 12
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. As can be seen from fig. 8A to 8C, 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 10C. 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, a seventh lens E7, and a filter E8.
The first lens element E1 has positive power, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens element E2 has positive power, and has a 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 concave image-side surface S8. The fifth lens element E5 has negative power, and has a convex object-side surface S9 and a concave image-side surface S10. The sixth lens element E6 has positive power, and has a convex object-side surface S11 and a convex image-side surface S12. The seventh lens element E7 has negative power, and has a concave object-side surface S13 and a concave image-side surface S14. Filter E8 has an object side S15 and an image side S16. The optical imaging lens has an imaging surface S17, and light from the object passes through the respective surfaces S1 to S16 in order and is finally imaged on the imaging surface S17.
Table 13 shows basic parameters of the optical imaging lens of embodiment 5, in which the unit of the radius of curvature and the thickness/distance are both millimeters (mm). Tables 14 and 15 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.
Watch 13
TABLE 14
| Flour mark | A18 | A20 | A22 | A24 | A26 | A28 | A30 |
| S1 | 1.4615E-03 | 8.6906E-04 | 3.3081E-04 | 6.8419E-05 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S2 | 1.1349E-03 | 2.3338E-04 | -6.1869E-05 | -4.2164E-05 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S3 | 8.5293E-04 | 2.4120E-04 | -2.3010E-05 | -3.8251E-05 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S4 | -5.0872E-06 | 5.9559E-05 | 2.7916E-05 | 7.5580E-06 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S5 | -2.0852E-04 | -7.6490E-05 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S6 | 2.7474E-06 | 9.0869E-06 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S7 | 9.4786E-05 | 4.7484E-05 | 1.9252E-05 | 1.3525E-05 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S8 | 1.6560E-05 | 1.1616E-05 | 4.8367E-08 | -3.9961E-07 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S9 | 3.2209E-05 | 2.0086E-05 | 1.7799E-05 | 3.1135E-06 | -4.8306E-07 | -3.8199E-06 | 0.0000E+00 |
| S10 | 1.0696E-04 | 4.0972E-05 | 2.6360E-05 | 1.1684E-05 | 9.4750E-06 | 0.0000E+00 | 0.0000E+00 |
| S11 | -6.7223E-03 | -4.7550E-03 | -2.7655E-03 | -1.3514E-03 | -5.3758E-04 | -1.5821E-04 | -2.5118E-05 |
| S12 | 1.6814E-03 | -6.7777E-04 | -5.5259E-04 | 2.8277E-04 | 2.0964E-04 | -1.5929E-05 | -1.9879E-05 |
| S13 | -6.7924E-04 | -2.5804E-03 | 9.1440E-04 | 7.8260E-04 | -2.9471E-04 | -2.0432E-04 | 1.0636E-04 |
| S14 | 9.5521E-04 | -8.9479E-04 | 9.9144E-05 | -1.8047E-04 | -1.8353E-04 | -1.0035E-04 | 6.1305E-05 |
Watch 15
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. As can be seen from fig. 10A to 10C, 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 12C. 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, a seventh lens E7, and a filter E8.
The first lens element E1 has positive power, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens element E2 has positive power, and has a convex object-side surface S3 and a convex image-side surface S4. The third lens element E3 has negative power, and has a convex object-side surface S5 and a concave image-side surface S6. The fourth lens element E4 has positive 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 concave image-side surface S10. The sixth lens element E6 has positive power, and has a concave object-side surface S11 and a convex image-side surface S12. The seventh lens element E7 has negative power, and has a concave object-side surface S13 and a concave image-side surface S14. Filter E8 has an object side S15 and an image side S16. The optical imaging lens has an imaging surface S17, and light from the object passes through the respective surfaces S1 to S16 in order and is finally imaged on the imaging surface S17.
Table 16 shows basic parameters of the optical imaging lens of example 6, in which the unit of the radius of curvature and the thickness/distance are both millimeters (mm). Tables 17 and 18 show the high-order term coefficients that can be used for each aspherical mirror surface in example 6, wherein each aspherical mirror surface type can be defined by the formula (1) given in example 1 above.
TABLE 16
| Flour mark | A4 | A6 | A8 | A10 | A12 | A14 | A16 |
| S1 | -6.0300E-02 | -3.3953E-02 | -1.3913E-02 | -7.4942E-03 | -3.4056E-03 | -1.3738E-03 | -4.2071E-04 |
| S2 | -2.3500E-01 | 1.0548E-02 | -8.8228E-03 | -6.8862E-03 | -2.4395E-03 | -1.1905E-03 | -1.2111E-04 |
| S3 | -2.9125E-01 | -4.0896E-02 | -7.8770E-03 | 9.6864E-04 | 2.0777E-03 | 6.2798E-04 | 3.7699E-04 |
| S4 | -8.2368E-02 | -1.9170E-02 | 5.2245E-03 | -3.5818E-04 | 8.3039E-04 | 5.1854E-05 | 2.0141E-04 |
| S5 | -1.9858E-01 | 5.8220E-02 | -1.1044E-02 | -1.0750E-04 | -2.5472E-04 | 6.8885E-05 | 8.3724E-05 |
| S6 | -1.0183E-01 | 5.5452E-02 | -4.4942E-04 | -1.0213E-03 | -1.2152E-03 | -4.1685E-04 | -4.3299E-05 |
| S7 | -3.0482E-03 | 4.4927E-02 | 1.4462E-02 | 2.0917E-03 | 2.8492E-04 | 1.6854E-04 | 1.2014E-04 |
| S8 | -7.3443E-02 | 1.5586E-02 | 6.7392E-03 | 1.2266E-03 | 1.6601E-04 | 6.8720E-05 | 3.6982E-05 |
| S9 | -3.5520E-01 | -3.5567E-02 | -7.5330E-03 | -1.6895E-03 | -5.2750E-04 | 6.2353E-05 | 1.4565E-04 |
| S10 | -5.8718E-01 | -1.2134E-02 | -2.9496E-04 | 2.6934E-03 | 2.5280E-03 | 1.9484E-03 | 1.1367E-03 |
| S11 | -7.1947E-01 | -1.1427E-03 | 6.9509E-03 | 2.8271E-03 | 3.5222E-03 | 2.0038E-03 | 7.2351E-04 |
| S12 | -7.9317E-01 | -1.5187E-03 | 1.4863E-02 | -8.0936E-03 | 4.3274E-03 | -2.7981E-04 | 1.9354E-03 |
| S13 | -1.0701E+00 | 4.4284E-01 | -7.9409E-02 | 2.5914E-02 | -9.1900E-03 | 3.2972E-03 | 1.1776E-03 |
| S14 | -2.2508E+00 | 2.9390E-01 | -8.9262E-02 | 4.0666E-02 | -1.0520E-02 | 2.3424E-03 | -2.5751E-04 |
TABLE 17
| Flour mark | A18 | A20 | A22 | A24 | A26 | A28 | A30 |
| S1 | 4.1827E-06 | 9.5038E-05 | 5.7980E-05 | 1.5661E-05 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S2 | 1.6827E-04 | 9.2219E-05 | 1.9811E-05 | -5.4396E-06 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S3 | 2.7703E-04 | 1.1029E-04 | 1.7408E-05 | -7.5799E-06 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S4 | 6.9337E-06 | 7.1356E-06 | 5.0353E-06 | 1.3014E-06 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S5 | -1.7917E-05 | -1.6899E-05 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S6 | 3.0130E-05 | 1.5265E-05 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S7 | 5.3346E-05 | 2.2333E-05 | 8.3262E-06 | 5.9184E-06 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S8 | 1.7491E-05 | 8.9303E-06 | 1.8930E-06 | 1.1691E-08 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S9 | 1.1891E-04 | 6.0953E-05 | 3.5016E-05 | 9.8828E-06 | 2.6394E-06 | -2.8444E-06 | 0.0000E+00 |
| S10 | 5.9719E-04 | 2.9359E-04 | 1.4246E-04 | 5.6632E-05 | 1.9792E-05 | 0.0000E+00 | 0.0000E+00 |
| S11 | 1.7039E-04 | 2.5163E-05 | -2.2134E-05 | -3.1836E-05 | -2.5535E-05 | -1.4488E-05 | -3.6904E-06 |
| S12 | 1.2102E-03 | -3.1030E-04 | -5.0416E-04 | 1.0703E-04 | 1.5270E-04 | 1.5383E-05 | 1.7112E-05 |
| S13 | -1.1157E-03 | -1.7905E-03 | 8.4202E-04 | 7.7268E-04 | -3.0247E-04 | -2.5384E-04 | 1.1564E-04 |
| S14 | 7.3711E-04 | -3.5796E-04 | -7.3582E-06 | -1.2453E-04 | -8.5500E-05 | -6.0613E-05 | 4.2062E-05 |
Watch 18
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. As can be seen from fig. 12A to 12C, the optical imaging lens according to embodiment 6 can achieve good imaging quality.
Further, in embodiments 1 to 6, an on-axis distance TTL from the object side surface of the first lens of the optical imaging lens to the imaging surface of the optical imaging lens, a half ImgH of the diagonal length of the effective pixel area on the imaging surface of the optical imaging lens, an f-number Fno of the optical imaging lens, an effective focal length f of the optical imaging lens, and focal length values f1 to f7 of the respective lenses are as shown in table 19.
| Parameters/ |
1 | 2 | 3 | 4 | 5 | 6 |
| TTL(mm) | 9.80 | 9.90 | 9.60 | 10.22 | 9.50 | 9.60 |
| ImgH(mm) | 4.20 | 4.20 | 4.20 | 4.20 | 4.20 | 4.20 |
| Fno | 1.25 | 1.26 | 1.28 | 1.24 | 1.23 | 1.28 |
| f(mm) | 8.68 | 8.55 | 8.31 | 8.64 | 8.24 | 8.34 |
| f1(mm) | 19.47 | 18.42 | 19.33 | 19.24 | 17.66 | 19.37 |
| f2(mm) | 7.17 | 7.31 | 7.13 | 7.19 | 7.34 | 7.14 |
| f3(mm) | -7.87 | -8.30 | -8.44 | -8.20 | -8.48 | -8.34 |
| f4(mm) | 170.33 | 35.96 | 41.21 | 31.81 | 43.45 | 34.81 |
| f5(mm) | 23.52 | 54.12 | 48.54 | 177.62 | -814.01 | 48.54 |
| f6(mm) | -188.52 | 35.59 | 78.40 | 24.60 | 26.23 | 36.84 |
| f7(mm) | -10.89 | -7.39 | -8.12 | -7.27 | -8.39 | -7.24 |
The conditional expressions in examples 1 to 6 satisfy the conditions shown in table 20, respectively.
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 (17)
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 positive optical power;
a third lens with negative focal power, the image side surface of which is concave;
a fourth lens with focal power, wherein the image side surface of the fourth lens is convex;
a fifth lens having optical power;
a sixth lens having optical power; and
a seventh lens having a negative optical power,
wherein, the optical imaging lens satisfies:
TTL/EPD＜1.6；
1 < R3/R6 < 1.5; and
0.9＜T45/CT4＜1.3，
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, EPD is an entrance pupil diameter of the optical imaging lens, R3 is a radius of curvature of an object-side surface of the second lens element, R6 is a radius of curvature of an image-side surface of the third lens element, T45 is a distance separating the fourth lens element and the fifth lens element on the optical axis, and CT4 is a center thickness of the fourth lens element on the optical axis.
2. The optical imaging lens of claim 1, wherein the effective focal length f2 of the second lens and the effective focal length f3 of the third lens satisfy:
0.5＜f2/f3＜1。
3. the optical imaging lens of claim 1, wherein the effective focal length f1 of the first lens, the effective focal length f2 of the second lens and the effective focal length f3 of the third lens satisfy:
1＜f1/(f2-f3)＜1.5。
4. the optical imaging lens of claim 1, wherein the effective focal length f of the optical imaging lens, the effective focal length f1 of the first lens satisfy:
2＜f1/f＜2.5。
5. the optical imaging lens of claim 1, wherein the radius of curvature R14 of the image side surface of the seventh lens and the effective focal length f7 of the seventh lens satisfy:
-1＜R14/f7＜-0.5。
6. the optical imaging lens of claim 1, wherein a central thickness CT1 of the first lens on the optical axis and a central thickness CT2 of the second lens on the optical axis satisfy:
0＜CT1/CT2＜1。
7. the optical imaging lens of claim 1, wherein the maximum effective radius DT11 of the object side surface of the first lens and the maximum effective radius DT72 of the image side surface of the seventh lens satisfy:
0.7＜DT11/DT72＜1。
8. the optical imaging lens according to claim 1, wherein a maximum effective radius DT11 of the object side surface of the first lens and a half ImgH of a diagonal length of an effective pixel area on an imaging surface of the optical imaging lens satisfy:
0.5＜DT11/ImgH＜1。
9. the optical imaging lens according to claim 1, wherein the maximum effective radius DT32 of the image side surface of the third lens, the maximum effective radius DT41 of the object side surface of the fourth lens, and the maximum effective radius DT51 of the object side surface of the fifth lens satisfy:
0.5＜(DT32-DT41)/(DT41-DT51)＜1.1。
10. the optical imaging lens according to claim 1, wherein the maximum effective radius DT12 of the image side surface of the first lens, the maximum effective radius DT21 of the object side surface of the second lens, the maximum effective radius DT22 of the image side surface of the second lens, and the maximum effective radius DT31 of the object side surface of the third lens satisfy:
0＜(DT12-DT21)/(DT22-DT31)＜1。
11. the optical imaging lens of claim 1, wherein an on-axis distance from an intersection point of the 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 SAG72 and an on-axis distance from an intersection point of the object-side surface of the first lens and the optical axis to an effective radius vertex of the object-side surface of the first lens SAG11 satisfy:
-0.7＜SAG72/SAG11＜-0.2。
12. the optical imaging lens of claim 1, wherein an on-axis distance from an intersection of an object-side surface of the fourth lens and the optical axis to an effective radius vertex of the object-side surface of the fourth lens, SAG41, and an intersection 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, SAG52 satisfies:
-1＜SAG41/SAG52＜-0.3。
13. the optical imaging lens of claim 1, wherein an on-axis distance SAG41 from an intersection point of an object-side surface of the fourth lens and the optical axis to an effective radius vertex of the object-side surface of the fourth lens and a center thickness CT4 of the fourth lens on the optical axis satisfy:
0.3＜SAG41/CT4＜0.9。
14. the optical imaging lens of claim 1, wherein an on-axis distance SAG32 from an intersection point of the image side surface of the third lens and the optical axis to an effective radius vertex of the image side surface of the third lens to the optical axis is separated from the third lens and the fourth lens by a distance T34 on the optical axis satisfies:
0.8＜SAG32/T34＜1.2。
15. the optical imaging lens of claim 1, wherein a center thickness CT6 of the sixth lens on the optical axis and an edge thickness ET6 of the sixth lens at a maximum effective radius satisfy:
1＜CT6/ET6＜1.5。
16. the optical imaging lens of claim 1, wherein an on-axis distance from an intersection point 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 SAG61 and 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 SAG62 satisfy:
0.5＜SAG61/SAG62＜1。
17. the optical imaging lens according to any one of claims 1 to 16, characterized in that the optical imaging lens further comprises a prism disposed on an object side of the first lens.
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