CN215813519U - Optical imaging lens - Google Patents
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- CN215813519U CN215813519U CN202121862307.4U CN202121862307U CN215813519U CN 215813519 U CN215813519 U CN 215813519U CN 202121862307 U CN202121862307 U CN 202121862307U CN 215813519 U CN215813519 U CN 215813519U
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Abstract
The utility model provides an optical imaging lens. The imaging lens sequentially comprises the following components from the object side to the image side of the imaging lens: the first lens has negative focal power, and the object side surface of the first lens is a convex surface; the second lens has negative focal power, and the object side surface of the second lens is a concave surface; a third lens having a positive focal power; a fourth lens having a positive refractive power; the fifth lens has negative focal power, and the object side surface of the fifth lens is a concave surface; a sixth lens having a positive refractive power; the object side surface of the seventh lens is a convex surface, and the image side surface of the seventh lens is a concave surface; and the combined focal length f12 of the first lens and the second lens and the effective focal length f of the optical imaging lens satisfy the following conditions: -2.0< f12/f < -1.0. The utility model solves the problem that the optical imaging lens in the prior art has large wide angle and high image quality which are difficult to be considered simultaneously.
Description
Technical Field
The utility model relates to the technical field of optical imaging equipment, in particular to an optical imaging lens.
Background
In recent years, smart device imaging plays an important role in life and work against the background of rapid development of the internet. The large wide-angle optical imaging lens can be applied to smart homes, video conferences, monitoring security and other scenes at present, the real-time performance of man-machine interaction is enhanced, and convenient service is provided for remote office. In order to make the intelligent device of the optical imaging lens more widely used, the temperature stability, the viewing range, the size and the imaging quality of the optical imaging lens are all important factors for manufacturers, and are also targets for the practical application of consumer electronic products. The existing large wide-angle optical imaging lens generally has the problems that the size and the imaging quality are difficult to meet the requirements of users, and the use satisfaction of the users is greatly influenced.
That is to say, the optical imaging lens in the prior art has the problem that the wide angle and the high image quality are difficult to be compatible.
SUMMERY OF THE UTILITY MODEL
The utility model mainly aims to provide an optical imaging lens to solve the problem that the optical imaging lens in the prior art has large wide angle and high image quality and is difficult to realize at the same time.
In order to achieve the above object, according to an aspect of the present invention, there is provided an optical imaging lens, comprising, in order from an object side to an image side of the optical imaging lens: the first lens has negative focal power, and the object side surface of the first lens is a convex surface; the second lens has negative focal power, and the object side surface of the second lens is a concave surface; a third lens having a positive focal power; a fourth lens having a positive refractive power; the fifth lens has negative focal power, and the object side surface of the fifth lens is a concave surface; a sixth lens having a positive refractive power; the object side surface of the seventh lens is a convex surface, and the image side surface of the seventh lens is a concave surface; and the combined focal length f12 of the first lens and the second lens and the effective focal length f of the optical imaging lens satisfy the following conditions: -2.0< f12/f < -1.0.
Further, the maximum field angle FOV of the optical imaging lens satisfies: 125 ° < FOV <148 °.
Further, the effective focal length f1 of the first lens and the effective focal length f2 of the second lens satisfy: 0< f1/f2< 1.5.
Further, a radius of curvature R1 of the object-side surface of the first lens and a radius of curvature R2 of the image-side surface of the first lens satisfy: 0.7< (R1+ R2)/(R1-R2) < 1.5.
Further, the radius of curvature R6 of the image-side surface of the third lens, the radius of curvature R5 of the object-side surface of the third lens, and the effective focal length f3 of the third lens satisfy: 2.5< (R5-R6)/f3< 6.5.
Further, the radius of curvature R8 of the image-side surface of the fourth lens, the radius of curvature R7 of the object-side surface of the fourth lens, and the effective focal length f4 of the fourth lens satisfy: 1.8< (R7-R8)/f4< 2.5.
Further, the effective focal length f5 of the fifth lens, the effective focal length f6 of the sixth lens and the effective focal length f of the optical imaging lens satisfy: 0.5< (f5+ f6)/f < 3.8.
Further, an on-axis distance TTL from the object-side surface of the first lens to the imaging surface and a center thickness CT3 of the third lens on the optical axis satisfy: 4.1< TTL/CT3< 5.1.
Further, the effective semi-aperture DT11 of the object side surface of the first lens and the effective semi-aperture DT41 of the object side surface of the fourth lens satisfy: 5.4< DT11/DT41< 6.4.
Further, the effective half caliber DT72 of the image side surface of the seventh lens and the effective half caliber DT42 of the image side surface of the fourth lens satisfy: 2.1< DT72/DT42< 2.8.
Further, the on-axis distance SL from the diaphragm to the imaging surface, the central thickness CT4 of the fourth lens on the optical axis, the central thickness CT5 of the fifth lens on the optical axis, the central thickness CT6 of the sixth lens on the optical axis, and the central thickness CT7 of the seventh lens on the optical axis satisfy: 1.5< SL/(CT4+ CT5+ CT6+ CT7) < 2.0.
Further, the combined focal length f23 of the second lens and the third lens, the edge thickness ET2 of the second lens and the edge thickness ET3 of the third lens satisfy: 1.1< f23/(ET2+ ET3) < 1.8.
Further, the central thickness CT1 of the first lens on the optical axis and the edge thickness ET1 of the first lens satisfy: 1.1< ET1/CT1< 1.9.
Further, the edge thickness ET5 of the fifth lens, the edge thickness ET6 of the sixth lens and the edge thickness ET7 of the seventh lens satisfy: 1.0< (ET6+ ET7)/ET5< 2.0.
According to another aspect of the present invention, there is provided an optical imaging lens, comprising, in order from an object side to an image side of the optical imaging lens: the first lens has negative focal power, and the object side surface of the first lens is a convex surface; the second lens has negative focal power, and the object side surface of the second lens is a concave surface; a third lens having a positive focal power; a fourth lens having a positive refractive power; the fifth lens has negative focal power, and the object side surface of the fifth lens is a concave surface; a sixth lens having a positive refractive power; the object side surface of the seventh lens is a convex surface, and the image side surface of the seventh lens is a concave surface; wherein, the on-axis distance SL from the diaphragm to the imaging surface, the central thickness CT4 of the fourth lens on the optical axis, the central thickness CT5 of the fifth lens on the optical axis, the central thickness CT6 of the sixth lens on the optical axis and the central thickness CT7 of the seventh lens on the optical axis satisfy: 1.5< SL/(CT4+ CT5+ CT6+ CT7) < 2.0.
Further, the combined focal length f12 of the first lens and the second lens and the effective focal length f of the optical imaging lens satisfy: -2.0< f12/f < -1.0; the maximum field angle FOV of the optical imaging lens satisfies the following conditions: 125 ° < FOV <148 °.
Further, the effective focal length f1 of the first lens and the effective focal length f2 of the second lens satisfy: 0< f1/f2< 1.5.
Further, a radius of curvature R1 of the object-side surface of the first lens and a radius of curvature R2 of the image-side surface of the first lens satisfy: 0.7< (R1+ R2)/(R1-R2) < 1.5.
Further, the radius of curvature R6 of the image-side surface of the third lens, the radius of curvature R5 of the object-side surface of the third lens, and the effective focal length f3 of the third lens satisfy: 2.5< (R5-R6)/f3< 6.5.
Further, the radius of curvature R8 of the image-side surface of the fourth lens, the radius of curvature R7 of the object-side surface of the fourth lens, and the effective focal length f4 of the fourth lens satisfy: 1.8< (R7-R8)/f4< 2.5.
Further, the effective focal length f5 of the fifth lens, the effective focal length f6 of the sixth lens and the effective focal length f of the optical imaging lens satisfy: 0.5< (f5+ f6)/f < 3.8.
Further, an on-axis distance TTL from the object-side surface of the first lens to the imaging surface and a center thickness CT3 of the third lens on the optical axis satisfy: 4.1< TTL/CT3< 5.1; the effective half aperture DT11 of the object side surface of the first lens and the effective half aperture DT41 of the object side surface of the fourth lens satisfy that: 5.4< DT11/DT41< 6.4.
Further, the effective half caliber DT72 of the image side surface of the seventh lens and the effective half caliber DT42 of the image side surface of the fourth lens satisfy: 2.1< DT72/DT42< 2.8.
Further, the combined focal length f23 of the second lens and the third lens, the edge thickness ET2 of the second lens and the edge thickness ET3 of the third lens satisfy: 1.1< f23/(ET2+ ET3) < 1.8.
Further, the central thickness CT1 of the first lens on the optical axis and the edge thickness ET1 of the first lens satisfy: 1.1< ET1/CT1< 1.9.
Further, the edge thickness ET5 of the fifth lens, the edge thickness ET6 of the sixth lens and the edge thickness ET7 of the seventh lens satisfy: 1.0< (ET6+ ET7)/ET5< 2.0.
By applying the technical scheme of the utility model, the optical imaging lens sequentially comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens from the object side to the image side of the optical imaging lens, wherein the first lens has negative focal power, and the object side surface of the first lens is a convex surface; the second lens has negative focal power, and the object side surface of the second lens is a concave surface; the third lens has positive focal power; the fourth lens has positive focal power; the fifth lens has negative focal power, and the object side surface of the fifth lens is a concave surface; the sixth lens has positive focal power; the object side surface of the seventh lens is a convex surface, and the image side surface of the seventh lens is a concave surface; and the combined focal length f12 of the first lens and the second lens and the effective focal length f of the optical imaging lens satisfy the following conditions: -2.0< f12/f < -1.0.
Through the reasonable distribution of the focal power and the surface type of the light to each lens, various aberrations of the system can be effectively balanced and corrected, astigmatism and distortion can be effectively reduced, and the imaging quality of the optical imaging lens is greatly improved. The ratio of the composite focal length f12 of the first lens and the second lens to the effective focal length f of the optical imaging lens is limited within a reasonable range, so that the ratio of the composite focal length of the first lens and the second lens in the system focal length is limited, and the correction of the vertical axis chromatic aberration of the system is facilitated. In addition, the optical imaging lens has the characteristics of miniaturization, large wide angle and high image quality, meets the requirements of users and market practical application, and improves the use satisfaction of the users.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the utility model and, together with the description, serve to explain the utility model and not to limit the utility model. In the drawings:
fig. 1 is a schematic structural view showing an optical imaging lens according to a first example of the present invention;
fig. 2 to 5 respectively show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve of the optical imaging lens in fig. 1;
fig. 6 is a schematic view showing a configuration of an optical imaging lens according to a second example of the present invention;
fig. 7 to 10 respectively show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve of the optical imaging lens in fig. 6;
fig. 11 is a schematic structural view showing an optical imaging lens of example three of the present invention;
fig. 12 to 15 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 in fig. 11;
fig. 16 is a schematic configuration diagram showing an optical imaging lens of example four of the present invention;
fig. 17 to 20 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 in fig. 16;
fig. 21 is a schematic view showing a configuration of an optical imaging lens of example five of the present invention;
fig. 22 to 25 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 in fig. 21;
fig. 26 is a schematic structural view showing an optical imaging lens of example six of the present invention;
fig. 27 to 30 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 in fig. 26;
fig. 31 is a schematic configuration diagram showing an optical imaging lens of example seven of the present invention;
fig. 32 to 35 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 in fig. 31.
Wherein the figures include the following reference numerals:
STO, stop; e1, first lens; s1, the object side surface of the first lens; s2, an image side surface of the first lens; e2, second lens; s3, the object side surface of the second lens; s4, an image side surface of the second lens; e3, third lens; s5, the object side surface of the third lens; s6, an image side surface of the third lens; e4, fourth lens; s7, the object side surface of the fourth lens; s8, an image side surface of the fourth lens element; e5, fifth lens; s9, the object side surface of the fifth lens; s10, an image side surface of the fifth lens element; e6, sixth lens; s11, the object-side surface of the sixth lens element; s12, an image side surface of the sixth lens element; e7, seventh lens; s13, an object-side surface of the seventh lens; s14, an image side surface of the seventh lens element; e8, optical filters; s15, the object side surface of the optical filter; s16, the image side surface of the optical filter; and S17, imaging surface.
Detailed Description
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 invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
It is noted that, unless otherwise indicated, all 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.
In the present invention, unless specified to the contrary, use of the terms of orientation such as "upper, lower, top, bottom" or the like, generally refer to the orientation as shown in the drawings, or to the component itself in a vertical, perpendicular, or gravitational orientation; likewise, for ease of understanding and description, "inner and outer" refer to the inner and outer relative to the profile of the components themselves, but the above directional words are not intended to limit the utility model.
It should be noted that in this specification, the expressions first, second, third, etc. are used only to distinguish one feature from another, and do not represent any limitation on the features. Thus, the first lens discussed below may also be referred to as the second lens or the third lens without departing from the teachings of the present application.
In the drawings, the thickness, size, and shape of the lens have been slightly exaggerated for convenience of explanation. In particular, the shapes of the spherical or aspherical surfaces shown in the drawings are shown by way of example. That is, the shape of the spherical surface or the aspherical surface is not limited to the shape of the spherical surface or the aspherical surface shown in the drawings. The figures are purely diagrammatic and not drawn to scale.
Herein, the paraxial region refers to a region near the optical axis. If the lens surface is convex and the convex position is not defined, it means that the lens surface is convex at least in the paraxial region; if the lens surface is concave and the concave position is not defined, it means that the lens surface is concave at least in the paraxial region. The surface of each lens close to the object side becomes the object side surface of the lens, and the surface of each lens close to the image side is called the image side surface of the lens. The determination of the surface shape in the paraxial region can be performed by determining whether or not the surface shape is concave or convex, based on the R value (R denotes the radius of curvature of the paraxial region, and usually denotes the R value in a lens database (lens data) in optical software) in accordance with the determination method of a person ordinarily skilled in the art. For the object side surface, when the R value is positive, the object side surface is judged to be convex, and when the R value is negative, the object side surface is judged to be concave; in the case of the image side surface, the image side surface is determined to be concave when the R value is positive, and is determined to be convex when the R value is negative.
The utility model provides an optical imaging lens, aiming at solving the problem that the optical imaging lens in the prior art has large wide angle and high image quality which are difficult to be considered at the same time.
Example one
As shown in fig. 1 to 35, the optical imaging lens includes, in order from an object side to an image side, a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element, a sixth lens element and a seventh lens element, where the first lens element has a negative focal power and an object-side surface of the first lens element is a convex surface; the second lens has negative focal power, and the object side surface of the second lens is a concave surface; the third lens has positive focal power; the fourth lens has positive focal power; the fifth lens has negative focal power, and the object side surface of the fifth lens is a concave surface; the sixth lens has positive focal power; the object side surface of the seventh lens is a convex surface, and the image side surface of the seventh lens is a concave surface; and the combined focal length f12 of the first lens and the second lens and the effective focal length f of the optical imaging lens satisfy the following conditions: -2.0< f12/f < -1.0.
Preferably, -1.9< f12/f < -1.0.
Through the reasonable distribution of the focal power and the surface type of the light to each lens, various aberrations of the system can be effectively balanced and corrected, astigmatism and distortion can be effectively reduced, and the imaging quality of the optical imaging lens is greatly improved. The ratio of the composite focal length f12 of the first lens and the second lens to the effective focal length f of the optical imaging lens is limited within a reasonable range, so that the ratio of the composite focal length of the first lens and the second lens in the system focal length is limited, and the correction of the vertical axis chromatic aberration of the system is facilitated. In addition, the optical imaging lens has the characteristics of miniaturization, large wide angle and high image quality, meets the requirements of users and market practical application, and improves the use satisfaction of the users.
In the present embodiment, the maximum field angle FOV of the optical imaging lens satisfies: 125 ° < FOV <148 °. The maximum field angle FOV of the optical imaging lens is limited within the range of 125-148 degrees, so that the optical imaging lens is favorable for meeting the field angle requirement, and the imaging field range of the optical imaging lens is ensured to be large enough to realize the large-wide-angle optical imaging lens. Preferably 133 ° < FOV <138 °.
In the present embodiment, the effective focal length f1 of the first lens and the effective focal length f2 of the second lens satisfy: 0< f1/f2< 1.5. By properly planning the ratio of the effective focal length f1 of the first lens to the effective focal length f2 of the second lens, a proper distribution of negative focal power can be achieved, which is beneficial for correcting off-axis aberrations. Preferably 0.3< f1/f2< 1.4.
In the present embodiment, a radius of curvature R1 of the object-side surface of the first lens and a radius of curvature R2 of the image-side surface of the first lens satisfy: 0.7< (R1+ R2)/(R1-R2) < 1.5. The shape of the first lens is limited within a reasonable range by limiting the conditional expressions, and the processability of the first lens is guaranteed. Preferably, 1.0< (R1+ R2)/(R1-R2) < 1.3.
In the present embodiment, the radius of curvature R6 of the image-side surface of the third lens, the radius of curvature R5 of the object-side surface of the third lens, and the effective focal length f3 of the third lens satisfy: 2.5< (R5-R6)/f3< 6.5. The conditional expression is satisfied, the shape of the third lens is limited, and the processability of the third lens is ensured. Preferably, 2.7< (R5-R6)/f3< 6.3.
In the present embodiment, the radius of curvature R8 of the image-side surface of the fourth lens, the radius of curvature R7 of the object-side surface of the fourth lens, and the effective focal length f4 of the fourth lens satisfy: 1.8< (R7-R8)/f4< 2.5. Satisfying this conditional expression restricts the shape of the fourth lens, which is beneficial to the system balancing of aberrations. Preferably, 2.0< (R7-R8)/f4< 2.3.
In the present embodiment, the effective focal length f5 of the fifth lens, the effective focal length f6 of the sixth lens, and the effective focal length f of the optical imaging lens satisfy: 0.5< (f5+ f6)/f < 3.8. The conditional expression is satisfied, the proportion of the focal length of the fifth lens and the focal length of the sixth lens in the focal length of the system is limited, and the correction of the vertical axis chromatic aberration of the system is facilitated. Preferably, 0.6< (f5+ f6)/f < 3.7.
In the present embodiment, the on-axis distance TTL from the object-side surface to the imaging surface of the first lens element and the central thickness CT3 of the third lens element on the optical axis satisfy: 4.1< TTL/CT3< 5.1. The ratio of the distance TTL from the object side surface of the first lens to the imaging surface on the axis to the central thickness CT3 of the third lens on the optical axis is in a reasonable range, so that the shape and the position of the third lens are limited, the third lens processability is guaranteed, ghost images are reduced, and the imaging quality is guaranteed. Preferably, 4.3< TTL/CT3< 5.0.
In the present embodiment, the effective half aperture DT11 of the object-side surface of the first lens and the effective half aperture DT41 of the object-side surface of the fourth lens satisfy: 5.4< DT11/DT41< 6.4. The condition is met, the shape proportion of the first lens and the fourth lens is limited, and the relative illumination is favorably improved. Preferably 5.5< DT11/DT41< 6.3.
In this embodiment, the effective half aperture DT72 of the image-side surface of the seventh lens and the effective half aperture DT42 of the image-side surface of the fourth lens satisfy: 2.1< DT72/DT42< 2.8. The conditional expression is satisfied, the shape proportion of the fourth lens and the seventh lens is limited, on one hand, the lens processability is guaranteed, and on the other hand, the off-axis aberration is corrected. Preferably, 2.3< DT72/DT42< 2.7.
In the present embodiment, the on-axis distance SL from the diaphragm to the imaging surface, the central thickness CT4 of the fourth lens on the optical axis, the central thickness CT5 of the fifth lens on the optical axis, the central thickness CT6 of the sixth lens on the optical axis, and the central thickness CT7 of the seventh lens on the optical axis satisfy: 1.5< SL/(CT4+ CT5+ CT6+ CT7) < 2.0. By limiting SL/(CT4+ CT5+ CT6+ CT7) within a reasonable range, the position and the optical back focal length of the diaphragm are limited, which is not only beneficial to correcting off-axis aberration, but also beneficial to reducing ghost images so as to improve the imaging quality. Preferably, 1.7< SL/(CT4+ CT5+ CT6+ CT7) < 1.9.
In the present embodiment, the combined focal length f23 of the second lens and the third lens, the edge thickness ET2 of the second lens, and the edge thickness ET3 of the third lens satisfy: 1.1< f23/(ET2+ ET3) < 1.8. The shape of the second lens and the shape of the third lens are limited when the conditional expression is met, the Petzian image surface curvature of the system can be corrected, and the processability of the lenses can be guaranteed. Preferably, 1.2< f23/(ET2+ ET3) < 1.6.
In the present embodiment, the central thickness CT1 of the first lens on the optical axis and the edge thickness ET1 of the first lens satisfy: 1.1< ET1/CT1< 1.9. Satisfying this conditional expression, having restricted the shape of first lens, be favorable to guaranteeing the manufacturability of first lens. Preferably, 1.2< ET1/CT1< 1.8.
In the present embodiment, the edge thicknesses ET5, ET6 and ET7 of the fifth lens and the sixth lens satisfy: 1.0< (ET6+ ET7)/ET5< 2.0. The conditional expression is satisfied, the shapes of the fifth lens, the sixth lens and the seventh lens are limited, the lens processability is guaranteed, and the off-axis aberration of the system is corrected. Preferably, 1.1< (ET6+ ET7)/ET5< 1.7.
Example two
As shown in fig. 1 to 35, the optical imaging lens includes, in order from an object side to an image side, a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element, a sixth lens element and a seventh lens element, where the first lens element has a negative focal power and an object-side surface of the first lens element is a convex surface; the second lens has negative focal power, and the object side surface of the second lens is a concave surface; the third lens has positive focal power; the fourth lens has positive focal power; the fifth lens has negative focal power, and the object side surface of the fifth lens is a concave surface; the sixth lens has positive focal power; the object side surface of the seventh lens is a convex surface, and the image side surface of the seventh lens is a concave surface; wherein, the on-axis distance SL from the diaphragm to the imaging surface, the central thickness CT4 of the fourth lens on the optical axis, the central thickness CT5 of the fifth lens on the optical axis, the central thickness CT6 of the sixth lens on the optical axis and the central thickness CT7 of the seventh lens on the optical axis satisfy: 1.5< SL/(CT4+ CT5+ CT6+ CT7) < 2.0.
Preferably, 1.7< SL/(CT4+ CT5+ CT6+ CT7) < 1.9.
Through the reasonable distribution of the focal power and the surface type of the light to each lens, various aberrations of the system can be effectively balanced and corrected, astigmatism and distortion can be effectively reduced, and the imaging quality of the optical imaging lens is greatly improved. By limiting SL/(CT4+ CT5+ CT6+ CT7) within a reasonable range, the position and the optical back focal length of the diaphragm are limited, which is not only beneficial to correcting off-axis aberration, but also beneficial to reducing ghost images so as to improve the imaging quality. In addition, the optical imaging lens has the characteristics of miniaturization, large wide angle and high image quality, meets the requirements of users and market practical application, and improves the use satisfaction of the users.
In the present embodiment, a combined focal length f12 of the first lens and the second lens and an effective focal length f of the optical imaging lens satisfy: -2.0< f12/f < -1.0. The ratio of the composite focal length f12 of the first lens and the second lens to the effective focal length f of the optical imaging lens is limited within a reasonable range, so that the ratio of the composite focal length of the first lens and the second lens in the system focal length is limited, and the correction of the vertical axis chromatic aberration of the system is facilitated. The ratio of the composite focal length f12 of the first lens and the second lens to the effective focal length f of the optical imaging lens is limited within a reasonable range, so that the ratio of the composite focal length of the first lens and the second lens in the system focal length is limited, and the correction of the vertical axis chromatic aberration of the system is facilitated.
In the present embodiment, the maximum field angle FOV of the optical imaging lens satisfies: 125 ° < FOV <148 °. The maximum field angle FOV of the optical imaging lens is limited within the range of 125-148 degrees, so that the optical imaging lens is favorable for meeting the field angle requirement, and the imaging field range of the optical imaging lens is ensured to be large enough to realize the large-wide-angle optical imaging lens. Preferably 133 ° < FOV <138 °.
In the present embodiment, the effective focal length f1 of the first lens and the effective focal length f2 of the second lens satisfy: 0< f1/f2< 1.5. By properly planning the ratio of the effective focal length f1 of the first lens to the effective focal length f2 of the second lens, a proper distribution of negative focal power can be achieved, which is beneficial for correcting off-axis aberrations. Preferably 0.3< f1/f2< 1.4.
In the present embodiment, a radius of curvature R1 of the object-side surface of the first lens and a radius of curvature R2 of the image-side surface of the first lens satisfy: 0.7< (R1+ R2)/(R1-R2) < 1.5. The shape of the first lens is limited within a reasonable range by limiting the conditional expressions, and the processability of the first lens is guaranteed. Preferably, 1.0< (R1+ R2)/(R1-R2) < 1.3.
In the present embodiment, the radius of curvature R6 of the image-side surface of the third lens, the radius of curvature R5 of the object-side surface of the third lens, and the effective focal length f3 of the third lens satisfy: 2.5< (R5-R6)/f3< 6.5. The conditional expression is satisfied, the shape of the third lens is limited, and the processability of the third lens is ensured. Preferably, 2.7< (R5-R6)/f3< 6.3.
In the present embodiment, the radius of curvature R8 of the image-side surface of the fourth lens, the radius of curvature R7 of the object-side surface of the fourth lens, and the effective focal length f4 of the fourth lens satisfy: 1.8< (R7-R8)/f4< 2.5. Satisfying this conditional expression restricts the shape of the fourth lens, which is beneficial to the system balancing of aberrations. Preferably, 2.0< (R7-R8)/f4< 2.3.
In the present embodiment, the effective focal length f5 of the fifth lens, the effective focal length f6 of the sixth lens, and the effective focal length f of the optical imaging lens satisfy: 0.5< (f5+ f6)/f < 3.8. The conditional expression is satisfied, the proportion of the focal length of the fifth lens and the focal length of the sixth lens in the focal length of the system is limited, and the correction of the vertical axis chromatic aberration of the system is facilitated. Preferably, 0.6< (f5+ f6)/f < 3.7.
In the present embodiment, the on-axis distance TTL from the object-side surface to the imaging surface of the first lens element and the central thickness CT3 of the third lens element on the optical axis satisfy: 4.1< TTL/CT3< 5.1. The ratio of the distance TTL from the object side surface of the first lens to the imaging surface on the axis to the central thickness CT3 of the third lens on the optical axis is in a reasonable range, so that the shape and the position of the third lens are limited, the third lens processability is guaranteed, ghost images are reduced, and the imaging quality is guaranteed. Preferably, 4.3< TTL/CT3< 5.0.
In the present embodiment, the effective half aperture DT11 of the object-side surface of the first lens and the effective half aperture DT41 of the object-side surface of the fourth lens satisfy: 5.4< DT11/DT41< 6.4. The condition is met, the shape proportion of the first lens and the fourth lens is limited, and the relative illumination is favorably improved. Preferably 5.5< DT11/DT41< 6.3.
In this embodiment, the effective half aperture DT72 of the image-side surface of the seventh lens and the effective half aperture DT42 of the image-side surface of the fourth lens satisfy: 2.1< DT72/DT42< 2.8. The conditional expression is satisfied, the shape proportion of the fourth lens and the seventh lens is limited, on one hand, the lens processability is guaranteed, and on the other hand, the off-axis aberration is corrected. Preferably, 2.3< DT72/DT42< 2.7.
In the present embodiment, the combined focal length f23 of the second lens and the third lens, the edge thickness ET2 of the second lens, and the edge thickness ET3 of the third lens satisfy: 1.1< f23/(ET2+ ET3) < 1.8. The shape of the second lens and the shape of the third lens are limited when the conditional expression is met, the Petzian image surface curvature of the system can be corrected, and the processability of the lenses can be guaranteed. Preferably, 1.2< f23/(ET2+ ET3) < 1.6.
In the present embodiment, the central thickness CT1 of the first lens on the optical axis and the edge thickness ET1 of the first lens satisfy: 1.1< ET1/CT1< 1.9. Satisfying this conditional expression, having restricted the shape of first lens, be favorable to guaranteeing the manufacturability of first lens. Preferably, 1.2< ET1/CT1< 1.8.
In the present embodiment, the edge thicknesses ET5, ET6 and ET7 of the fifth lens and the sixth lens satisfy: 1.0< (ET6+ ET7)/ET5< 2.0. The conditional expression is satisfied, the shapes of the fifth lens, the sixth lens and the seventh lens are limited, the lens processability is guaranteed, and the off-axis aberration of the system is corrected. Preferably, 1.1< (ET6+ ET7)/ET5< 1.7.
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 in the present application may employ a plurality of lenses, such as the seven lenses described above. By reasonably distributing the focal power, the surface shape, the central thickness of each lens, the axial distance between each lens and the like, the aperture of the optical imaging lens can be effectively increased, the sensitivity of the lens can be reduced, and the machinability of the lens can be improved, so that the optical imaging lens is more beneficial to production and processing and can be suitable for portable electronic equipment such as smart phones. The optical imaging lens also has the advantages of wide angle, miniaturization and good imaging quality, and can meet the miniaturization requirement of intelligent electronic products.
In the present application, at least one of the mirror surfaces of each lens is an aspherical mirror surface. The aspheric lens is characterized in that: the curvature varies continuously from the center of the lens to the periphery of the lens. Unlike a spherical lens having a constant curvature from the center of the lens to the periphery of the lens, an aspherical lens has better curvature radius characteristics, and has advantages of improving distortion aberration and improving astigmatic aberration. After the aspheric lens is adopted, the aberration generated during imaging can be eliminated as much as possible, thereby improving the imaging quality.
However, it will be appreciated by those skilled in the art that the number of lenses constituting an optical imaging lens may be varied to achieve the various results and advantages described in the present specification without departing from the claimed subject matter. For example, although five lenses are exemplified in the embodiment, the optical imaging lens is not limited to include five lenses. The optical imaging lens may also include other numbers of lenses, as desired.
Examples of specific surface types and parameters applicable to the optical imaging lens of the above-described embodiment are further described below with reference to the drawings.
It should be noted that any one of the following examples one to seven is applicable to all embodiments of the present application.
Example one
As shown in fig. 1 to 5, an optical imaging lens of the first example of the present application is described. Fig. 1 shows a schematic diagram of an optical imaging lens structure of example one.
As shown in fig. 1, the optical imaging lens includes, in order from an object side to an image side: a first lens E1, a second lens E2, a third lens E3, a stop STO, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, a filter E8, and an image forming surface S17.
The first lens element E1 has negative power, and the object-side surface S1 of the first lens element is convex and the image-side surface S2 of the first lens element is concave. The second lens element E2 has negative power, and the object-side surface S3 of the second lens element is concave, and the image-side surface S4 of the second lens element is concave. The third lens element E3 has positive refractive power, and the object-side surface S5 and the image-side surface S6 of the third lens element are convex. The fourth lens element E4 has positive refractive power, and the object-side surface S7 and the image-side surface S8 of the fourth lens element are convex. The fifth lens E5 has negative power, and the object-side surface S9 of the fifth lens is concave, and the image-side surface S10 of the fifth lens is concave. The sixth lens element E6 has positive refractive power, and the object-side surface S11 of the sixth lens element is convex and the image-side surface S12 of the sixth lens element is concave. The seventh lens element E7 has negative power, and the object-side surface S13 of the seventh lens element is convex, and the image-side surface S14 of the seventh lens element is concave. The filter E8 has an object side surface S15 of the filter and an image side surface S16 of the filter. The light from the object sequentially passes through the respective surfaces S1 to S16 and is finally imaged on the imaging surface S17.
In this example, the total effective focal length f of the optical imaging lens is 1.63mm, the maximum field angle FOV of the optical imaging lens is 134.8 °, the total system length TTL of the optical imaging lens is 11.79mm, and the image height ImgH is 2.93 mm.
Table 1 shows a basic structural parameter table of the optical imaging lens of example one, in which the units of the radius of curvature, the thickness/distance, the focal length, and the effective radius are all millimeters (mm).
TABLE 1
In the first example, the object-side surface and the image-side surface of any one of the first lens element E1 through the seventh lens element E7 are aspheric, and the surface shape of each aspheric lens can be defined by, but is not limited to, the following aspheric 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 below gives the high-order coefficient A4, A6, A8, A10, A12, A14, A16, A18, A20 that can be used for each of the aspherical mirrors S1-S14 in example one.
| Flour mark | A4 | A6 | A8 | A10 | A12 | A14 | A16 | A18 | A20 |
| S1 | 1.8762E-02 | -4.5293E-03 | 6.1108E-04 | -5.2433E-05 | 2.9765E-06 | -1.1185E-07 | 2.6847E-09 | -3.7380E-11 | 2.3013E-13 |
| S2 | 1.6365E-02 | -1.3906E-04 | -5.1123E-03 | 2.5482E-03 | -5.7083E-04 | 6.4469E-05 | -3.3697E-06 | 3.8980E-08 | 1.7309E-09 |
| S3 | 2.3678E-02 | 2.8619E-02 | -2.5455E-02 | 9.3137E-03 | -1.9710E-03 | 2.6036E-04 | -2.1338E-05 | 1.0002E-06 | -2.0644E-08 |
| S4 | 7.4220E-02 | -4.4970E-03 | 9.6320E-02 | -1.7478E-01 | 1.3379E-01 | -5.7237E-02 | 1.4453E-02 | -2.0432E-03 | 1.2665E-04 |
| S5 | 1.4883E-02 | 2.6620E-04 | -1.6325E-03 | -7.1529E-03 | 7.3963E-03 | -3.3140E-03 | 7.1916E-04 | -6.0073E-05 | 0.0000E+00 |
| S6 | 1.2388E-02 | -1.9920E-02 | 2.2592E-02 | -1.6705E-02 | 7.5037E-03 | -1.4579E-03 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S7 | 3.9981E-02 | -1.2475E-01 | 5.8702E-01 | -1.8800E+00 | 3.1377E+00 | -2.7118E+00 | 8.7560E-01 | 0.0000E+00 | 0.0000E+00 |
| S8 | -9.8529E-02 | -1.8506E-01 | 1.0772E+00 | -2.9290E+00 | 4.3946E+00 | -3.3723E+00 | 1.0362E+00 | 0.0000E+00 | 0.0000E+00 |
| S9 | -2.3894E-01 | -1.3390E-01 | 1.2219E+00 | -3.4234E+00 | 5.2573E+00 | -4.0806E+00 | 1.2555E+00 | 0.0000E+00 | 0.0000E+00 |
| S10 | -1.8960E-01 | 1.1906E-01 | 9.6853E-02 | -3.0044E-01 | 3.3500E-01 | -1.7629E-01 | 3.6175E-02 | 0.0000E+00 | 0.0000E+00 |
| S11 | 4.3866E-02 | -8.9679E-02 | 1.5333E-01 | -2.3005E-01 | 2.3709E-01 | -1.6390E-01 | 7.1754E-02 | -1.7863E-02 | 1.9076E-03 |
| S12 | 8.3449E-02 | -9.6156E-03 | -5.6128E-02 | 6.4561E-02 | -4.0870E-02 | 1.6246E-02 | -3.9799E-03 | 5.4706E-04 | -3.2239E-05 |
| S13 | -3.8053E-02 | -6.8153E-02 | 1.1291E-01 | -8.5696E-02 | 3.6844E-02 | -9.3999E-03 | 1.4151E-03 | -1.1654E-04 | 4.0568E-06 |
| S14 | 4.3771E-02 | -1.5335E-01 | 1.3055E-01 | -6.4475E-02 | 2.0102E-02 | -4.0322E-03 | 5.0377E-04 | -3.5465E-05 | 1.0666E-06 |
TABLE 2
Fig. 2 shows an on-axis chromatic aberration curve of the optical imaging lens of example one, which represents the deviation of the convergent focus of light rays of different wavelengths after passing through the optical imaging lens. Fig. 3 shows astigmatism curves of the optical imaging lens of example one, which represent meridional field curvature and sagittal field curvature. Fig. 4 shows distortion curves of the optical imaging lens of example one, which indicate distortion magnitude values corresponding to different angles of view. Fig. 5 shows a chromatic aberration of magnification curve of the optical imaging lens of the first example, which represents a deviation of different image heights on the imaging plane after light passes through the optical imaging lens.
As can be seen from fig. 2 to 5, the optical imaging lens according to the first example can achieve good imaging quality.
Example two
As shown in fig. 6 to 10, an optical imaging lens of example two of the present application is described. In this example and the following examples, descriptions of parts similar to example one will be omitted for the sake of brevity. Fig. 6 shows a schematic diagram of the optical imaging lens structure of example two.
As shown in fig. 6, the optical imaging lens includes, in order from an object side to an image side: a first lens E1, a second lens E2, a third lens E3, a stop STO, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, a filter E8, and an image forming surface S17.
The first lens element E1 has negative power, and the object-side surface S1 of the first lens element is convex and the image-side surface S2 of the first lens element is concave. The second lens element E2 has negative power, and the object-side surface S3 of the second lens element is concave, and the image-side surface S4 of the second lens element is concave. The third lens element E3 has positive refractive power, and the object-side surface S5 and the image-side surface S6 of the third lens element are convex. The fourth lens element E4 has positive refractive power, and the object-side surface S7 and the image-side surface S8 of the fourth lens element are convex. The fifth lens E5 has negative power, and the object-side surface S9 of the fifth lens is concave, and the image-side surface S10 of the fifth lens is concave. The sixth lens element E6 has positive refractive 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 the object-side surface S13 of the seventh lens element is convex, and the image-side surface S14 of the seventh lens element is concave. The filter E8 has an object side surface S15 of the filter and an image side surface S16 of the filter. The light from the object sequentially passes through the respective surfaces S1 to S16 and is finally imaged on the imaging surface S17.
In this example, the total effective focal length f of the optical imaging lens is 1.66mm, the maximum field angle FOV of the optical imaging lens is 137.8 °, the total system length TTL of the optical imaging lens is 11.44mm, and the image height ImgH is 3.05 mm.
Table 3 shows a basic structural parameter table of the optical imaging lens of example two, in which the units of the radius of curvature, the thickness/distance, the focal length, and the effective radius are all millimeters (mm).
TABLE 3
Table 4 shows the high-order term coefficients that can be used for each aspherical mirror surface in example two, wherein each aspherical mirror surface type can be defined by formula (1) given in example two above.
| Flour mark | A4 | A6 | A8 | A10 | A12 | A14 | A16 | A18 | A20 |
| S1 | 2.2221E-02 | -5.4874E-03 | 7.5526E-04 | -6.6456E-05 | 3.9034E-06 | -1.5298E-07 | 3.8607E-09 | -5.7067E-11 | 3.7766E-13 |
| S2 | 3.1820E-02 | -1.0468E-03 | -6.5475E-03 | 3.1278E-03 | -7.6242E-04 | 1.0262E-04 | -7.0546E-06 | 1.7943E-07 | 8.7775E-10 |
| S3 | 6.2552E-02 | -8.9796E-03 | -1.5663E-02 | 1.0678E-02 | -3.3212E-03 | 6.0037E-04 | -6.5123E-05 | 3.9596E-06 | -1.0432E-07 |
| S4 | 9.1380E-02 | 3.0399E-02 | -1.0440E-01 | 9.8940E-02 | -5.7646E-02 | 2.3142E-02 | -6.1685E-03 | 9.6906E-04 | -6.7293E-05 |
| S5 | 1.1045E-02 | -8.3592E-03 | 6.8764E-04 | -1.4978E-04 | 6.1623E-04 | -3.4849E-04 | 9.0431E-05 | -1.1692E-05 | 5.7970E-07 |
| S6 | 1.1685E-02 | -1.6189E-02 | 1.7597E-02 | -1.2014E-02 | 4.3994E-03 | -5.6298E-04 | -2.1741E-05 | 0.0000E+00 | 0.0000E+00 |
| S7 | 1.5155E-02 | -5.7461E-02 | -1.4485E-01 | 1.4276E+00 | -6.0964E+00 | 1.2629E+01 | -1.3222E+01 | 5.5530E+00 | 0.0000E+00 |
| S8 | -1.7778E-01 | 1.5982E-01 | -4.0251E-01 | 1.5180E+00 | -3.6311E+00 | 4.8590E+00 | -3.4495E+00 | 1.0180E+00 | 0.0000E+00 |
| S9 | -3.0730E-01 | 4.5749E-01 | -8.4677E-01 | 2.7900E+00 | -6.7914E+00 | 1.0241E+01 | -9.3354E+00 | 4.7534E+00 | -1.0345E+00 |
| S10 | -1.7711E-01 | 3.5237E-01 | -6.6267E-01 | 1.4358E+00 | -2.2783E+00 | 2.3652E+00 | -1.5358E+00 | 5.6845E-01 | -9.1859E-02 |
| S11 | -1.1447E-02 | 1.1557E-01 | -4.9608E-01 | 1.0981E+00 | -1.5148E+00 | 1.3124E+00 | -6.9533E-01 | 2.0524E-01 | -2.5688E-02 |
| S12 | 8.2370E-02 | 3.0045E-03 | -9.4277E-02 | 1.5509E-01 | -1.6158E-01 | 1.0291E-01 | -3.7963E-02 | 7.1543E-03 | -4.7242E-04 |
| S13 | 4.6235E-02 | -2.3390E-01 | 3.0643E-01 | -2.5367E-01 | 1.4030E-01 | -5.1297E-02 | 1.1670E-02 | -1.4695E-03 | 7.7437E-05 |
| S14 | 2.8444E-02 | -1.8397E-01 | 1.7487E-01 | -9.6331E-02 | 3.3674E-02 | -7.5586E-03 | 1.0507E-03 | -8.2017E-05 | 2.7412E-06 |
TABLE 4
Fig. 7 shows an on-axis chromatic aberration curve of the optical imaging lens of example two, which represents the deviation of the convergent focus of light rays of different wavelengths after passing through the optical imaging lens. Fig. 8 shows astigmatism curves of the optical imaging lens of example two, which represent meridional field curvature and sagittal field curvature. Fig. 9 shows distortion curves of the optical imaging lens of example two, which indicate distortion magnitude values corresponding to different angles of view. Fig. 10 shows a chromatic aberration of magnification curve of the optical imaging lens of example two, which represents the deviation of different image heights on the imaging plane after light passes through the optical imaging lens.
As can be seen from fig. 7 to 10, the optical imaging lens according to the second example can achieve good imaging quality.
Example III
As shown in fig. 11 to 15, an optical imaging lens of example three of the present application is described. Fig. 11 shows a schematic diagram of an optical imaging lens structure of example three.
As shown in fig. 11, the optical imaging lens includes, in order from an object side to an image side: a first lens E1, a second lens E2, a third lens E3, a stop STO, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, a filter E8, and an image forming surface S17.
The first lens element E1 has negative power, and the object-side surface S1 of the first lens element is convex and the image-side surface S2 of the first lens element is concave. The second lens element E2 has negative power, and the object-side surface S3 of the second lens element is concave, and the image-side surface S4 of the second lens element is concave. The third lens element E3 has positive refractive power, and the object-side surface S5 and the image-side surface S6 of the third lens element are convex. The fourth lens element E4 has positive refractive power, and the object-side surface S7 and the image-side surface S8 of the fourth lens element are convex. The fifth lens E5 has negative power, and the object-side surface S9 of the fifth lens is concave, and the image-side surface S10 of the fifth lens is concave. The sixth lens element E6 has positive refractive 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 the object-side surface S13 of the seventh lens element is convex, and the image-side surface S14 of the seventh lens element is concave. The filter E8 has an object side surface S15 of the filter and an image side surface S16 of the filter. The light from the object sequentially passes through the respective surfaces S1 to S16 and is finally imaged on the imaging surface S17.
In this example, the total effective focal length f of the optical imaging lens is 1.79mm, the maximum field angle FOV of the optical imaging lens is 133.8 °, the total system length TTL of the optical imaging lens is 11.35mm, and the image height ImgH is 2.93 mm.
Table 5 shows a basic structural parameter table of the optical imaging lens of example three, in which the units of the radius of curvature, thickness/distance, focal length, and effective radius are all millimeters (mm).
TABLE 5
Table 6 shows the high-order term coefficients that can be used for each aspherical mirror surface in example three, wherein each aspherical mirror surface type can be defined by formula (1) given in example three above.
TABLE 6
Fig. 12 shows an on-axis chromatic aberration curve of the optical imaging lens of example three, which represents the deviation of the convergent focus of light rays of different wavelengths after passing through the optical imaging lens. Fig. 13 shows astigmatism curves of the optical imaging lens of example three, which represent meridional field curvature and sagittal field curvature. Fig. 14 shows distortion curves of the optical imaging lens of example three, which represent distortion magnitude values corresponding to different angles of view. Fig. 15 shows a chromatic aberration of magnification curve of the optical imaging lens of example three, which represents the deviation of different image heights on the imaging plane after light passes through the optical imaging lens.
As can be seen from fig. 12 to 15, the optical imaging lens according to the third example can achieve good imaging quality.
Example four
As shown in fig. 16 to 20, an optical imaging lens of example four of the present application is described. Fig. 16 shows a schematic diagram of an optical imaging lens structure of example four.
As shown in fig. 16, the optical imaging lens includes, in order from an object side to an image side: a first lens E1, a second lens E2, a third lens E3, a stop STO, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, a filter E8, and an image forming surface S17.
The first lens element E1 has negative power, and the object-side surface S1 of the first lens element is convex and the image-side surface S2 of the first lens element is concave. The second lens element E2 has negative power, and the object-side surface S3 of the second lens element is concave, and the image-side surface S4 of the second lens element is concave. The third lens element E3 has positive refractive power, and the object-side surface S5 and the image-side surface S6 of the third lens element are convex. The fourth lens element E4 has positive refractive power, and the object-side surface S7 and the image-side surface S8 of the fourth lens element are convex. The fifth lens E5 has negative power, and the object-side surface S9 of the fifth lens is concave, and the image-side surface S10 of the fifth lens is concave. The sixth lens element E6 has positive refractive 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 the object-side surface S13 of the seventh lens element is convex, and the image-side surface S14 of the seventh lens element is concave. The filter E8 has an object side surface S15 of the filter and an image side surface S16 of the filter. The light from the object sequentially passes through the respective surfaces S1 to S16 and is finally imaged on the imaging surface S17.
In this example, the total effective focal length f of the optical imaging lens is 1.63mm, the maximum field angle FOV of the optical imaging lens is 134.1 °, the total system length TTL of the optical imaging lens is 11.92mm, and the image height ImgH is 2.93 mm.
Table 7 shows a basic structural parameter table of the optical imaging lens of example four, in which the units of the radius of curvature, the thickness/distance, the focal length, and the effective radius are all millimeters (mm).
TABLE 7
Table 8 shows the high-order term coefficients that can be used for each aspherical mirror surface in example four, wherein each aspherical mirror surface type can be defined by formula (1) given in example four above.
| Flour mark | A4 | A6 | A8 | A10 | A12 | A14 | A16 | A18 | A20 |
| S1 | 2.1157E-02 | -4.9281E-03 | 6.0938E-04 | -4.7831E-05 | 2.5147E-06 | -8.8777E-08 | 2.0310E-09 | -2.7359E-11 | 1.6552E-13 |
| S2 | 2.1972E-02 | 4.6770E-03 | -1.1083E-02 | 5.7216E-03 | -1.6704E-03 | 2.9932E-04 | -3.2668E-05 | 2.0028E-06 | -5.3188E-08 |
| S3 | 4.3177E-02 | 1.9062E-02 | -3.0258E-02 | 1.4041E-02 | -3.5479E-03 | 5.4626E-04 | -5.1547E-05 | 2.7580E-06 | -6.4330E-08 |
| S4 | 8.0810E-02 | 5.1094E-02 | -6.9730E-02 | 1.7578E-02 | 9.2570E-03 | -7.9640E-03 | 2.5799E-03 | -4.2107E-04 | 2.8446E-05 |
| S5 | 1.1135E-02 | 3.4346E-03 | -1.3048E-02 | 9.8948E-03 | -5.6133E-03 | 2.4832E-03 | -6.9928E-04 | 1.0611E-04 | -6.5902E-06 |
| S6 | 8.2477E-03 | -4.1718E-03 | -1.7266E-03 | 4.3986E-03 | -2.9372E-03 | 8.9209E-04 | -1.0684E-04 | 0.0000E+00 | 0.0000E+00 |
| S7 | 2.3081E-02 | -8.5129E-02 | 3.1686E-01 | -1.0211E+00 | 1.6899E+00 | -1.4791E+00 | 5.1009E-01 | 0.0000E+00 | 0.0000E+00 |
| S8 | -1.1559E-01 | 1.1832E-01 | -3.8432E-02 | -6.9791E-01 | 1.9223E+00 | -2.1425E+00 | 1.0742E+00 | -1.9020E-01 | 0.0000E+00 |
| S9 | -2.4970E-01 | 3.1732E-01 | -1.1294E-01 | -8.1998E-01 | 1.5060E+00 | 4.9239E-02 | -2.2698E+00 | 2.0572E+00 | -5.7220E-01 |
| S10 | -1.9136E-01 | 2.4718E-01 | -8.4777E-02 | -1.8677E-01 | 3.3608E-01 | -2.1392E-01 | 4.9389E-02 | 0.0000E+00 | 0.0000E+00 |
| S11 | -6.8157E-03 | 2.5231E-02 | -7.8253E-02 | 1.1326E-01 | -1.2414E-01 | 9.8021E-02 | -5.3932E-02 | 1.8273E-02 | -2.8498E-03 |
| S12 | 1.0978E-01 | -5.7979E-02 | 1.0919E-02 | 5.9807E-03 | -7.3648E-03 | 3.7499E-03 | -1.0608E-03 | 1.5863E-04 | -9.7411E-06 |
| S13 | -2.5010E-02 | -6.3387E-02 | 8.4710E-02 | -5.8481E-02 | 2.4023E-02 | -5.9553E-03 | 8.7536E-04 | -7.0456E-05 | 2.3975E-06 |
| S14 | 3.2942E-02 | -1.3434E-01 | 1.1108E-01 | -5.3689E-02 | 1.6468E-02 | -3.2555E-03 | 4.0106E-04 | -2.7854E-05 | 8.2775E-07 |
TABLE 8
Fig. 17 shows an on-axis chromatic aberration curve of the optical imaging lens of example four, which represents the deviation of the convergent focus of light rays of different wavelengths after passing through the optical imaging lens. Fig. 18 shows astigmatism curves of the optical imaging lens of example four, which represent meridional field curvature and sagittal field curvature. Fig. 19 shows distortion curves of the optical imaging lens of example four, which represent distortion magnitude values corresponding to different angles of view. Fig. 20 shows a chromatic aberration of magnification curve of the optical imaging lens of example four, which represents a deviation of different image heights on the imaging plane after light passes through the optical imaging lens.
As can be seen from fig. 17 to 20, the optical imaging lens according to example four can achieve good imaging quality.
Example five
As shown in fig. 21 to 25, an optical imaging lens of example five of the present application is described. Fig. 21 shows a schematic diagram of an optical imaging lens structure of example five.
As shown in fig. 21, the optical imaging lens includes, in order from an object side to an image side: a first lens E1, a second lens E2, a third lens E3, a stop STO, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, a filter E8, and an image forming surface S17.
The first lens element E1 has negative power, and the object-side surface S1 of the first lens element is convex and the image-side surface S2 of the first lens element is concave. The second lens element E2 has negative power, and the object-side surface S3 of the second lens element is concave, and the image-side surface S4 of the second lens element is concave. The third lens element E3 has positive refractive power, and the object-side surface S5 and the image-side surface S6 of the third lens element are convex. The fourth lens element E4 has positive refractive power, and the object-side surface S7 and the image-side surface S8 of the fourth lens element are convex. The fifth lens E5 has negative power, and the object-side surface S9 of the fifth lens is concave, and the image-side surface S10 of the fifth lens is concave. The sixth lens element E6 has positive refractive power, and the object-side surface S11 of the sixth lens element is convex and the image-side surface S12 of the sixth lens element is concave. The seventh lens element E7 has positive refractive power, and the object-side surface S13 of the seventh lens element is convex, and the image-side surface S14 of the seventh lens element is concave. The filter E8 has an object side surface S15 of the filter and an image side surface S16 of the filter. The light from the object sequentially passes through the respective surfaces S1 to S16 and is finally imaged on the imaging surface S17.
In this example, the total effective focal length f of the optical imaging lens is 1.68mm, the maximum field angle FOV of the optical imaging lens is 135.9 °, the total system length TTL of the optical imaging lens is 11.48mm, and the image height ImgH is 2.93 mm.
Table 9 shows a basic structural parameter table of the optical imaging lens of example five, in which the units of the radius of curvature, thickness/distance, focal length, and effective radius are all millimeters (mm).
Table 10 shows the high-order term coefficients that can be used for each aspherical mirror surface in example five, wherein each aspherical mirror surface type can be defined by formula (1) given in example five above.
| Flour mark | A4 | A6 | A8 | A10 | A12 | A14 | A16 | A18 | A20 |
| S1 | 7.5532E-03 | -3.9591E-05 | -1.5291E-04 | 2.0389E-05 | -1.3116E-06 | 4.9425E-08 | -1.1192E-09 | 1.4150E-11 | -7.6207E-14 |
| S2 | 6.4440E-03 | 5.7012E-03 | -5.5697E-03 | 4.6318E-03 | -2.4565E-03 | 7.0324E-04 | -1.1173E-04 | 9.4410E-06 | -3.3387E-07 |
| S3 | 5.4033E-02 | -1.0715E-02 | -1.1819E-02 | 9.5036E-03 | -3.2871E-03 | 6.5294E-04 | -7.7348E-05 | 5.1026E-06 | -1.4462E-07 |
| S4 | 8.0857E-02 | -1.0056E-02 | -3.0951E-02 | 2.3852E-02 | -5.7353E-03 | -1.3004E-03 | 1.1387E-03 | -2.6306E-04 | 2.1572E-05 |
| S5 | 8.0464E-03 | 2.6189E-03 | -1.7916E-02 | 1.9691E-02 | -1.3292E-02 | 5.8289E-03 | -1.5547E-03 | 2.2614E-04 | -1.3709E-05 |
| S6 | 5.9001E-03 | 3.3621E-03 | -1.3931E-02 | 1.6809E-02 | -1.0348E-02 | 3.2240E-03 | -4.0108E-04 | 0.0000E+00 | 0.0000E+00 |
| S7 | 9.8947E-03 | -3.4169E-02 | -2.1749E-01 | 1.6318E+00 | -6.2537E+00 | 1.2019E+01 | -1.1608E+01 | 4.4161E+00 | 0.0000E+00 |
| S8 | -2.2980E-01 | 5.5713E-01 | -1.0273E+00 | 1.5493E+00 | -2.6941E+00 | 3.7983E+00 | -2.9953E+00 | 9.4722E-01 | 0.0000E+00 |
| S9 | -4.2949E-01 | 1.3717E+00 | -3.4735E+00 | 8.7661E+00 | -1.9646E+01 | 3.0770E+01 | -2.9539E+01 | 1.5520E+01 | -3.4042E+00 |
| S10 | -3.4118E-01 | 1.2969E+00 | -3.2509E+00 | 6.4568E+00 | -9.2927E+00 | 9.0437E+00 | -5.5646E+00 | 1.9378E+00 | -2.8828E-01 |
| S11 | -7.6852E-02 | 3.8321E-01 | -1.0759E+00 | 1.7572E+00 | -1.8634E+00 | 1.2928E+00 | -5.7369E-01 | 1.5088E-01 | -1.9157E-02 |
| S12 | 6.5067E-02 | -4.4864E-02 | -7.9245E-03 | -8.1412E-03 | 5.0542E-02 | -5.2381E-02 | 2.5249E-02 | -6.0442E-03 | 5.7719E-04 |
| S13 | 1.4988E-02 | -1.3318E-01 | 1.6222E-01 | -1.1013E-01 | 4.3983E-02 | -1.0412E-02 | 1.4287E-03 | -1.0372E-04 | 3.0051E-06 |
| S14 | -1.0306E-01 | 5.3238E-03 | 1.8979E-02 | -1.4271E-02 | 5.7251E-03 | -1.4963E-03 | 2.4869E-04 | -2.3488E-05 | 9.4874E-07 |
Fig. 22 shows an on-axis chromatic aberration curve of the optical imaging lens of example five, which represents the deviation of the convergent focal points of light rays of different wavelengths after passing through the optical imaging lens. Fig. 23 shows astigmatism curves of the optical imaging lens of example five, which represent meridional field curvature and sagittal field curvature. Fig. 24 shows distortion curves of the optical imaging lens of example five, which represent distortion magnitude values corresponding to different angles of view. Fig. 25 shows a chromatic aberration of magnification curve of the optical imaging lens of example five, which represents deviations of different image heights on the imaging plane after light passes through the optical imaging lens.
As can be seen from fig. 22 to 25, the optical imaging lens according to example five can achieve good imaging quality.
Example six
As shown in fig. 26 to 30, an optical imaging lens of example six of the present application is described. Fig. 26 shows a schematic diagram of an optical imaging lens structure of example six.
As shown in fig. 26, the optical imaging lens, in order from an object side to an image side, comprises: a first lens E1, a second lens E2, a third lens E3, a stop STO, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, a filter E8, and an image forming surface S17.
The first lens element E1 has negative power, and the object-side surface S1 of the first lens element is convex and the image-side surface S2 of the first lens element is concave. The second lens element E2 has negative power, and the object-side surface S3 of the second lens element is concave, and the image-side surface S4 of the second lens element is convex. The third lens element E3 has positive refractive power, and the object-side surface S5 and the image-side surface S6 of the third lens element are convex. The fourth lens element E4 has positive refractive power, and the object-side surface S7 and the image-side surface S8 of the fourth lens element are convex. The fifth lens element E5 has negative power, and the object-side surface S9 of the fifth lens element is concave, and the image-side surface S10 of the fifth lens element is convex. The sixth lens element E6 has positive refractive power, and the object-side surface S11 of the sixth lens element is convex and the image-side surface S12 of the sixth lens element is concave. The seventh lens element E7 has negative power, and the object-side surface S13 of the seventh lens element is convex, and the image-side surface S14 of the seventh lens element is concave. The filter E8 has an object side surface S15 of the filter and an image side surface S16 of the filter. The light from the object sequentially passes through the respective surfaces S1 to S16 and is finally imaged on the imaging surface S17.
In this example, the total effective focal length f of the optical imaging lens is 1.70mm, the maximum field angle FOV of the optical imaging lens is 135.5 °, the total system length TTL of the optical imaging lens is 11.28mm, and the image height ImgH is 2.93 mm.
Table 11 shows a basic structural parameter table of the optical imaging lens of example six, in which the units of the radius of curvature, thickness/distance, focal length, and effective radius are all millimeters (mm).
TABLE 11
Table 12 shows the high-order term coefficients that can be used for each aspherical mirror surface in example six, wherein each aspherical mirror surface type can be defined by formula (1) given in example six above.
TABLE 12
Fig. 27 shows on-axis chromatic aberration curves of the optical imaging lens of example six, which represent the deviation of the convergence focus of light rays of different wavelengths after passing through the optical imaging lens. Fig. 28 shows astigmatism curves representing meridional field curvature and sagittal field curvature of the optical imaging lens of example six. Fig. 29 shows distortion curves of the optical imaging lens of example six, which represent distortion magnitude values corresponding to different angles of view. Fig. 30 shows a chromatic aberration of magnification curve of the optical imaging lens of example six, which represents deviations of different image heights on the imaging plane after light passes through the optical imaging lens.
As can be seen from fig. 27 to 30, the optical imaging lens according to example six can achieve good imaging quality.
Example seven
As shown in fig. 31 to 35, an optical imaging lens of example seven of the present application is described. Fig. 31 shows a schematic diagram of an optical imaging lens structure of example seven.
As shown in fig. 31, the optical imaging lens includes, in order from an object side to an image side: a first lens E1, a second lens E2, a third lens E3, a stop STO, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, a filter E8, and an image forming surface S17.
The first lens element E1 has negative power, and the object-side surface S1 of the first lens element is convex and the image-side surface S2 of the first lens element is concave. The second lens element E2 has negative power, and the object-side surface S3 of the second lens element is concave, and the image-side surface S4 of the second lens element is convex. The third lens element E3 has positive refractive power, and the object-side surface S5 and the image-side surface S6 of the third lens element are convex. The fourth lens element E4 has positive refractive power, and the object-side surface S7 and the image-side surface S8 of the fourth lens element are convex. The fifth lens E5 has negative power, and the object-side surface S9 of the fifth lens is concave, and the image-side surface S10 of the fifth lens is concave. The sixth lens element E6 has positive refractive power, and the object-side surface S11 of the sixth lens element is convex and the image-side surface S12 of the sixth lens element is concave. The seventh lens element E7 has positive refractive power, and the object-side surface S13 of the seventh lens element is convex, and the image-side surface S14 of the seventh lens element is concave. The filter E8 has an object side surface S15 of the filter and an image side surface S16 of the filter. The light from the object sequentially passes through the respective surfaces S1 to S16 and is finally imaged on the imaging surface S17.
In this example, the total effective focal length f of the optical imaging lens is 1.63mm, the maximum field angle FOV of the optical imaging lens is 137.3 °, the total system length TTL of the optical imaging lens is 11.33mm, and the image height ImgH is 2.93 mm.
Table 13 shows a basic structural parameter table of the optical imaging lens of example seven, in which the units of the radius of curvature, the thickness/distance, the focal length, and the effective radius are all millimeters (mm).
Watch 13
Table 14 shows the high-order term coefficients that can be used for each aspherical mirror surface in example seven, wherein each aspherical mirror surface type can be defined by formula (1) given in example seven above.
| Flour mark | A4 | A6 | A8 | A10 | A12 | A14 | A16 | A18 | A20 |
| S1 | 1.1676E-02 | -1.1269E-03 | -4.4850E-06 | 8.1714E-06 | -6.7303E-07 | 2.7730E-08 | -6.5626E-10 | 8.6783E-12 | -5.0843E-14 |
| S2 | 2.5078E-02 | -2.2881E-03 | 3.1159E-03 | -1.0470E-03 | -2.1024E-04 | 1.1896E-04 | -1.6006E-05 | 7.2560E-07 | -7.0300E-09 |
| S3 | 6.3951E-02 | -2.7139E-02 | 4.4849E-04 | 4.2666E-03 | -1.9734E-03 | 4.7271E-04 | -6.7924E-05 | 5.5616E-06 | -1.9888E-07 |
| S4 | 8.0581E-02 | -2.5203E-02 | -2.0345E-02 | 2.7512E-02 | -1.4891E-02 | 4.4739E-03 | -6.8334E-04 | 3.0611E-05 | 2.3117E-06 |
| S5 | 8.0464E-03 | 2.6189E-03 | -1.7916E-02 | 1.9691E-02 | -1.3292E-02 | 5.8289E-03 | -1.5547E-03 | 2.2614E-04 | -1.3709E-05 |
| S6 | 5.9001E-03 | 3.3621E-03 | -1.3931E-02 | 1.6809E-02 | -1.0348E-02 | 3.2240E-03 | -4.0108E-04 | 0.0000E+00 | 0.0000E+00 |
| S7 | 3.9430E-02 | -1.4249E-01 | 6.2048E-01 | -1.4704E+00 | -1.1854E-01 | 6.0090E+00 | -9.8184E+00 | 4.9945E+00 | 0.0000E+00 |
| S8 | -1.6485E-01 | 6.5510E-03 | -4.9910E-01 | 5.1975E+00 | -1.7312E+01 | 2.7165E+01 | -2.0983E+01 | 6.5049E+00 | 0.0000E+00 |
| S9 | -3.7984E-01 | 1.4916E+00 | -9.2368E+00 | 4.2330E+01 | -1.1775E+02 | 1.9735E+02 | -1.9662E+02 | 1.0775E+02 | -2.4999E+01 |
| S10 | -2.9824E-01 | 1.1872E+00 | -3.5486E+00 | 8.1667E+00 | -1.2479E+01 | 1.2209E+01 | -7.3605E+00 | 2.5011E+00 | -3.6802E-01 |
| S11 | -3.1622E-02 | 3.0667E-01 | -9.0966E-01 | 1.4952E+00 | -1.5797E+00 | 1.0828E+00 | -4.6531E-01 | 1.1329E-01 | -1.1833E-02 |
| S12 | 1.5284E-01 | -9.4578E-02 | -1.5282E-02 | 6.2351E-02 | -4.8582E-02 | 2.0366E-02 | -4.9600E-03 | 6.6121E-04 | -3.7564E-05 |
| S13 | 1.3074E-01 | -3.1511E-01 | 3.3886E-01 | -2.2366E-01 | 9.2601E-02 | -2.3904E-02 | 3.7372E-03 | -3.2434E-04 | 1.2007E-05 |
| S14 | -7.5165E-02 | -9.2473E-03 | 6.4660E-03 | 6.0098E-03 | -6.4031E-03 | 2.4388E-03 | -4.7918E-04 | 4.8779E-05 | -2.0434E-06 |
TABLE 14
Fig. 32 shows an on-axis chromatic aberration curve of the optical imaging lens of example seven, which represents the deviation of the convergent focal points of light rays of different wavelengths after passing through the optical imaging lens. Fig. 33 shows astigmatism curves representing meridional field curvature and sagittal field curvature of the optical imaging lens of example seven. Fig. 34 shows distortion curves of the optical imaging lens of example seven, which represent distortion magnitude values corresponding to different angles of view. Fig. 35 shows a chromatic aberration of magnification curve of the optical imaging lens of example seven, which represents deviations of different image heights on the imaging plane after light passes through the optical imaging lens.
As can be seen from fig. 32 to 35, the optical imaging lens according to example seven can achieve good imaging quality.
To sum up, examples one to seven respectively satisfy the relationships shown in table 15.
| Conditional formula/example | 1 | 2 | 3 | 4 | 5 | 6 | 7 |
| FOV(°) | 134.8 | 137.8 | 133.8 | 134.1 | 135.9 | 135.5 | 137.3 |
| f1/f2 | 1.31 | 0.65 | 0.31 | 0.88 | 0.66 | 0.34 | 0.31 |
| (R1+R2)/(R1-R2) | 1.23 | 1.17 | 1.09 | 1.25 | 1.11 | 1.12 | 1.10 |
| (R5-R6)/f3 | 2.79 | 4.00 | 6.29 | 3.89 | 3.84 | 3.84 | 3.84 |
| (R7-R8)/f4 | 2.24 | 2.12 | 2.10 | 2.07 | 2.07 | 2.10 | 2.08 |
| (f5+f6)/f | 0.97 | 0.60 | 1.14 | 0.92 | 3.68 | 2.62 | 2.74 |
| TTL/CT3 | 4.37 | 4.77 | 4.73 | 4.96 | 4.76 | 4.68 | 4.70 |
| DT11/DT41 | 6.21 | 6.07 | 5.95 | 5.59 | 5.90 | 6.27 | 6.21 |
| DT72/DT42 | 2.58 | 2.46 | 2.60 | 2.39 | 2.48 | 2.62 | 2.65 |
| SL/(CT4+CT5+CT6+CT7) | 1.76 | 1.88 | 1.87 | 1.73 | 1.70 | 1.82 | 1.78 |
| f12/f | -1.17 | -1.61 | -1.72 | -1.49 | -1.54 | -1.75 | -1.81 |
| f23/(ET2+ET3) | 1.23 | 1.57 | 1.45 | 1.60 | 1.51 | 1.40 | 1.38 |
| ET1/CT1 | 1.47 | 1.27 | 1.39 | 1.32 | 1.47 | 1.76 | 1.79 |
| (ET6+ET7)/ET5 | 1.65 | 1.47 | 1.59 | 1.58 | 1.47 | 1.34 | 1.14 |
Table 15 table 16 gives effective focal lengths f of the optical imaging lenses of example one to example seven, and effective focal lengths f1 to f7 of the respective lenses.
| |
1 | 2 | 3 | 4 | 5 | 6 | 7 |
| f1(mm) | -5.39 | -5.10 | -4.44 | -5.42 | -5.01 | -4.46 | -4.29 |
| f2(mm) | -4.13 | -7.90 | -14.27 | -6.17 | -7.59 | -13.00 | -14.00 |
| f3(mm) | 3.02 | 3.95 | 4.08 | 3.83 | 3.77 | 3.77 | 3.77 |
| f4(mm) | 3.10 | 3.08 | 3.04 | 2.93 | 2.72 | 2.87 | 2.69 |
| f5(mm) | -2.97 | -3.19 | -3.48 | -3.32 | -2.95 | -3.10 | -2.74 |
| f6(mm) | 4.55 | 4.18 | 5.51 | 4.82 | 9.15 | 7.56 | 7.19 |
| f7(mm) | -16.22 | -9.51 | -7.77 | -10.79 | 342.93 | -129.62 | 130.63 |
| f(mm) | 1.63 | 1.66 | 1.79 | 1.63 | 1.68 | 1.70 | 1.63 |
| TTL(mm) | 11.79 | 11.44 | 11.35 | 11.92 | 11.48 | 11.28 | 11.33 |
| ImgH(mm) | 2.93 | 3.05 | 2.93 | 2.93 | 2.93 | 2.93 | 2.93 |
TABLE 16
The present application also provides an imaging device whose electron photosensitive element may be a photo-coupled device (CCD) or a complementary metal oxide semiconductor device (CMOS). The imaging device may be a stand-alone imaging device such as a digital camera, or may be an imaging module integrated on a mobile electronic device such as a mobile phone. The imaging device is equipped with the optical imaging lens described above.
It is to be understood that the above-described embodiments are only a few, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular is intended to include the plural unless the context clearly dictates otherwise, and it should be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of features, steps, operations, devices, components, and/or combinations thereof.
It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (26)
1. An optical imaging lens, comprising, in order from an object side to an image side of the optical imaging lens:
a first lens having a negative focal power, an object side surface of the first lens being a convex surface;
a second lens having a negative focal power, the second lens having a concave object-side surface;
a third lens having a positive optical power;
a fourth lens having a positive optical power;
a fifth lens having a negative focal power, an object side surface of the fifth lens being a concave surface;
a sixth lens having a positive optical power;
the object side surface of the seventh lens is a convex surface, and the image side surface of the seventh lens is a concave surface;
wherein a combined focal length f12 of the first lens and the second lens and an effective focal length f of the optical imaging lens satisfy: -2.0< f12/f < -1.0.
2. The optical imaging lens of claim 1, wherein the maximum field angle FOV of the optical imaging lens satisfies: 125 ° < FOV <148 °.
3. The optical imaging lens of claim 1, wherein an effective focal length f1 of the first lens and an effective focal length f2 of the second lens satisfy: 0< f1/f2< 1.5.
4. The optical imaging lens of claim 1, wherein a radius of curvature R1 of the object-side surface of the first lens and a radius of curvature R2 of the image-side surface of the first lens satisfy: 0.7< (R1+ R2)/(R1-R2) < 1.5.
5. The optical imaging lens of claim 1, wherein the radius of curvature of the image-side surface of the third lens, R6, the radius of curvature of the object-side surface of the third lens, R5, and the effective focal length f3 of the third lens satisfy: 2.5< (R5-R6)/f3< 6.5.
6. The optical imaging lens of claim 1, wherein a radius of curvature R8 of an image side surface of the fourth lens, a radius of curvature R7 of an object side surface of the fourth lens, and an effective focal length f4 of the fourth lens satisfy: 1.8< (R7-R8)/f4< 2.5.
7. The optical imaging lens of claim 1, wherein the effective focal length f5 of the fifth lens, the effective focal length f6 of the sixth lens and the effective focal length f of the optical imaging lens satisfy: 0.5< (f5+ f6)/f < 3.8.
8. The optical imaging lens of claim 1, wherein an on-axis distance TTL between an object side surface and an imaging surface of the first lens element and a central thickness CT3 of the third lens element on an optical axis satisfy: 4.1< TTL/CT3< 5.1.
9. The optical imaging lens of claim 1, wherein an effective half aperture DT11 of the object side surface of the first lens and an effective half aperture DT41 of the object side surface of the fourth lens satisfy: 5.4< DT11/DT41< 6.4.
10. The optical imaging lens of claim 1, wherein an effective half aperture DT72 of the image side surface of the seventh lens and an effective half aperture DT42 of the image side surface of the fourth lens satisfy: 2.1< DT72/DT42< 2.8.
11. The optical imaging lens according to claim 1, wherein an on-axis distance SL from a diaphragm to an imaging surface, a central thickness CT4 of the fourth lens on an optical axis, a central thickness CT5 of the fifth lens on the optical axis, a central thickness CT6 of the sixth lens on the optical axis, and a central thickness CT7 of the seventh lens on the optical axis satisfy: 1.5< SL/(CT4+ CT5+ CT6+ CT7) < 2.0.
12. The optical imaging lens of claim 1, wherein a combined focal length f23 of the second lens and the third lens, an edge thickness ET2 of the second lens and an edge thickness ET3 of the third lens satisfy: 1.1< f23/(ET2+ ET3) < 1.8.
13. The optical imaging lens of claim 1, wherein a center thickness CT1 of the first lens on an optical axis and an edge thickness ET1 of the first lens satisfy: 1.1< ET1/CT1< 1.9.
14. The optical imaging lens according to claim 1, characterized in that the edge thickness ET5 of the fifth lens, the edge thickness ET6 of the sixth lens and the edge thickness ET7 of the seventh lens satisfy: 1.0< (ET6+ ET7)/ET5< 2.0.
15. An optical imaging lens, comprising, in order from an object side to an image side of the optical imaging lens:
a first lens having a negative focal power, an object side surface of the first lens being a convex surface;
a second lens having a negative focal power, the second lens having a concave object-side surface;
a third lens having a positive optical power;
a fourth lens having a positive optical power;
a fifth lens having a negative focal power, an object side surface of the fifth lens being a concave surface;
a sixth lens having a positive optical power;
the object side surface of the seventh lens is a convex surface, and the image side surface of the seventh lens is a concave surface;
wherein an on-axis distance SL of the diaphragm to an imaging surface, a central thickness CT4 of the fourth lens on an optical axis, a central thickness CT5 of the fifth lens on the optical axis, a central thickness CT6 of the sixth lens on the optical axis, and a central thickness CT7 of the seventh lens on the optical axis satisfy: 1.5< SL/(CT4+ CT5+ CT6+ CT7) < 2.0.
16. The optical imaging lens of claim 15, wherein a combined focal length f12 of the first and second lenses and an effective focal length f of the optical imaging lens satisfy: -2.0< f12/f < -1.0; the maximum field angle FOV of the optical imaging lens satisfies the following conditions: 125 ° < FOV <148 °.
17. The optical imaging lens of claim 15, wherein an effective focal length f1 of the first lens and an effective focal length f2 of the second lens satisfy: 0< f1/f2< 1.5.
18. The optical imaging lens of claim 15, wherein a radius of curvature R1 of the object-side surface of the first lens and a radius of curvature R2 of the image-side surface of the first lens satisfy: 0.7< (R1+ R2)/(R1-R2) < 1.5.
19. The optical imaging lens of claim 15, wherein the radius of curvature R6 of the image side surface of the third lens, the radius of curvature R5 of the object side surface of the third lens, and the effective focal length f3 of the third lens satisfy: 2.5< (R5-R6)/f3< 6.5.
20. The optical imaging lens of claim 15, wherein a radius of curvature R8 of an image side surface of the fourth lens, a radius of curvature R7 of an object side surface of the fourth lens, and an effective focal length f4 of the fourth lens satisfy: 1.8< (R7-R8)/f4< 2.5.
21. The optical imaging lens of claim 15, wherein the effective focal length f5 of the fifth lens, the effective focal length f6 of the sixth lens and the effective focal length f of the optical imaging lens satisfy: 0.5< (f5+ f6)/f < 3.8.
22. The optical imaging lens of claim 15, wherein an on-axis distance TTL between an object side surface and an imaging surface of the first lens element and a central thickness CT3 of the third lens element on an optical axis satisfy: 4.1< TTL/CT3< 5.1; the effective semi-aperture DT11 of the object side surface of the first lens and the effective semi-aperture DT41 of the object side surface of the fourth lens satisfy the following conditions: 5.4< DT11/DT41< 6.4.
23. The optical imaging lens of claim 15, wherein an effective half aperture DT72 of the image side surface of the seventh lens and an effective half aperture DT42 of the image side surface of the fourth lens satisfy: 2.1< DT72/DT42< 2.8.
24. The optical imaging lens of claim 15, wherein a combined focal length f23 of the second lens and the third lens, an edge thickness ET2 of the second lens and an edge thickness ET3 of the third lens satisfy: 1.1< f23/(ET2+ ET3) < 1.8.
25. The optical imaging lens of claim 15, wherein a center thickness CT1 of the first lens on the optical axis and an edge thickness ET1 of the first lens satisfy: 1.1< ET1/CT1< 1.9.
26. The optical imaging lens according to claim 15, characterized in that the edge thickness ET5 of the fifth lens, the edge thickness ET6 of the sixth lens and the edge thickness ET7 of the seventh lens satisfy: 1.0< (ET6+ ET7)/ET5< 2.0.
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| CN202121862307.4U CN215813519U (en) | 2021-08-10 | 2021-08-10 | Optical imaging lens |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114545605A (en) * | 2022-02-24 | 2022-05-27 | 浙江舜宇光学有限公司 | Imaging lens group |
| WO2024113723A1 (en) * | 2022-11-29 | 2024-06-06 | 东莞市宇瞳光学科技股份有限公司 | Low-distortion wide-angle lens |
-
2021
- 2021-08-10 CN CN202121862307.4U patent/CN215813519U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114545605A (en) * | 2022-02-24 | 2022-05-27 | 浙江舜宇光学有限公司 | Imaging lens group |
| CN114545605B (en) * | 2022-02-24 | 2023-07-14 | 浙江舜宇光学有限公司 | Imaging lens group |
| WO2024113723A1 (en) * | 2022-11-29 | 2024-06-06 | 东莞市宇瞳光学科技股份有限公司 | Low-distortion wide-angle lens |
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