CN114280761B - Optical imaging lens - Google Patents

Optical imaging lens Download PDF

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CN114280761B
CN114280761B CN202210001090.0A CN202210001090A CN114280761B CN 114280761 B CN114280761 B CN 114280761B CN 202210001090 A CN202210001090 A CN 202210001090A CN 114280761 B CN114280761 B CN 114280761B
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lens
optical imaging
optical
optical axis
imaging lens
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CN114280761A (en
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谢丽
黄林
戴付建
赵烈烽
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Zhejiang Sunny Optics Co Ltd
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Zhejiang Sunny Optics Co Ltd
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Abstract

The application discloses an optical imaging lens, which sequentially comprises the following components from an object side to an image side along an optical axis: a first lens; a second lens; the object side surface of the third lens is a concave surface, and the image side surface of the third lens is a convex surface; a fourth lens; a fifth lens; and a sixth lens. The distance TTL from the object side surface of the first lens element to the imaging surface of the optical imaging lens along the optical axis and half of the diagonal length ImgH of the effective pixel area on the imaging surface satisfy: TTL/ImgH <1.25. Half the diagonal length ImgH of the effective pixel region on the imaging plane satisfies: 5mm < ImgH. At least one lens of the first lens to the sixth lens is made of glass.

Description

Optical imaging lens
Technical Field
The present application relates to the field of optical elements, and more particularly, to an optical imaging lens.
Background
At present, the requirements of the mobile phone market on photographing are continuously improved, the main camera of the main-flow mobile phone flagship machine basically reaches more than 4800 ten thousand pixels, and six-piece or seven-piece lens structures are adopted, so that the mobile phone flagship machine is also a development trend of high-end photographing mobile phones in the future. It is known that the larger the pixel, the larger the image plane. Moreover, on the basis of ensuring the performance, the smaller and better the optical total length of the lens is, which are all technical challenges facing lens manufacturers. Therefore, there is a need in the market for an optical imaging lens with a large image plane, ultra-thin and high imaging quality, so as to better meet the requirements of manufacturers of smart devices such as mobile phones.
Disclosure of Invention
The application provides an optical imaging lens, which sequentially comprises the following components from an object side to an image side along an optical axis: a first lens; a second lens; the object side surface of the third lens is a concave surface, and the image side surface of the third lens is a convex surface; a fourth lens; a fifth lens; and a sixth lens. The distance TTL from the object side surface of the first lens to the imaging surface of the optical imaging lens along the optical axis and half of the diagonal length ImgH of the effective pixel area on the imaging surface may satisfy: TTL/ImgH <1.25. Half of the diagonal length ImgH of the effective pixel region on the imaging plane can satisfy: 5mm < ImgH. And at least one lens of the first lens to the sixth lens is made of glass.
In one embodiment, the optical imaging lens further includes a diaphragm, and a distance TD between the object side surface of the first lens element and the image side surface of the sixth lens element along the optical axis and a distance SD between the diaphragm and the image side surface of the sixth lens element along the optical axis may satisfy: 1< TD/SD <1.3.
In one embodiment, a distance BFL from an image side surface of the sixth lens to an imaging surface of the optical imaging lens along the optical axis and an entrance pupil diameter EPD of the optical imaging lens may satisfy: BFL/EPD <0.5.
In one embodiment, the optical imaging lens further includes a diaphragm, and the effective focal length f of the optical imaging lens, the distance SL between the diaphragm and the imaging surface of the optical imaging lens along the optical axis, and half of the Semi-FOV of the maximum field angle of the optical imaging lens may satisfy: 0.9< f/(SL×TAN (Semi-FOV)) <1.
In one embodiment, the entrance pupil diameter EPD of the optical imaging lens and half the diagonal length ImgH of the effective pixel area on the imaging surface of the optical imaging lens may satisfy: 0.4< EPD/ImgH <0.6.
In one embodiment, the effective focal length f2 of the second lens, the effective focal length f3 of the third lens, and the effective focal length f4 of the fourth lens may satisfy: 0.1< (f2+f3)/(f3+f4) <0.6.
In one embodiment, the effective focal length f5 of the fifth lens and the effective focal length f1 of the first lens may satisfy: 1< f5/f1<1.5.
In one embodiment, the effective focal length f1 of the first lens, the effective focal length f2 of the second lens, and the combined focal length f12 of the first lens and the second lens may satisfy: 1.5< |f1+f2|/f12<2.2.
In one embodiment, the effective focal length f6 of the sixth lens, the radius of curvature R11 of the object-side surface of the sixth lens, and the radius of curvature R12 of the image-side surface of the sixth lens may satisfy: -1< f 6/(r11+r12) <0.
In one embodiment, the minimum value ET of the edge thickness of each of the first to sixth lenses MIN And the maximum value ET of the edge thickness of each of the first lens to the sixth lens MAX The method can satisfy the following conditions: 0.3<ET MIN /ET MAX <0.6。
In one embodiment, the edge thickness ET4 of the fourth lens and the edge thickness ET5 of the fifth lens may satisfy: 0.9< ET4/ET5<1.1.
In one embodiment, the edge thickness ET6 of the sixth lens and the maximum value ET of the edge thickness of each of the first to sixth lenses MAX The method can satisfy the following conditions: et6=et MAX 。
In one embodiment, a center thickness CT1 of the first lens on the optical axis, an edge thickness ET1 of the first lens, a center thickness CT6 of the sixth lens on the optical axis, and an edge thickness ET6 of the sixth lens may satisfy: 0.8< (CT1+Et1)/(CT6+Et6) <1.1.
In one embodiment, a sum Σat of a distance T56 between the fifth lens and the sixth lens on the optical axis, a distance BFL between an image side surface of the sixth lens and an imaging surface of the optical imaging lens along the optical axis, and a distance Σat between any adjacent two lenses of the first lens to the sixth lens on the optical axis may satisfy: 0.8< (T56+BFL)/ΣAT <1.
In one embodiment, a sum Σat of the distances between any adjacent two lenses of the first lens to the sixth lens on the optical axis and a sum Σct of the thicknesses of centers of the first lens to the sixth lens on the optical axis, respectively, may satisfy: 0.7< ΣAT/ΣCT <1.
In one embodiment, a center thickness CT2 of the second lens on the optical axis and a center thickness CT4 of the fourth lens on the optical axis may satisfy: 0.9< CT2/CT4<1.2.
In one embodiment, a center thickness CT1 of the first lens on the optical axis, a center thickness CT3 of the third lens on the optical axis, and a center thickness CT5 of the fifth lens on the optical axis may satisfy: 0.9< (CT 1/CT 3)/(CT 5/CT 1) <1.1.
In one embodiment, a sum Σct of a center thickness CT1 of the first lens on the optical axis, a center thickness CT3 of the third lens on the optical axis, a center thickness CT5 of the fifth lens on the optical axis, and center thicknesses Σct of the first lens to the sixth lens on the optical axis, respectively, may satisfy: 0.65< (CT1+CT3+CT5)/(SIGMA CT < 0.8).
In one embodiment, the maximum effective radius DT11 of the object side surface of the first lens and the maximum effective radius DT62 of the image side surface of the sixth lens may satisfy: 0.25< DT11/DT62<0.4.
In one embodiment, the abbe number V1 of the first lens and the abbe number V2 of the second lens may satisfy: V1-V2>50.
The application adopts a six-lens framework, and provides the optical imaging lens with at least one of large image surface, ultra-thin and high imaging quality by reasonably distributing the focal power of each lens, optimally selecting the surface type and thickness of each lens, the interval distance between each lens and the like, thereby being beneficial to better meeting the demands of manufacturers of intelligent equipment such as mobile phones and the like.
Drawings
Other features, objects and advantages of the present application will become more apparent from the following detailed description of non-limiting embodiments, taken in conjunction with the accompanying drawings. In the drawings:
fig. 1 shows a schematic configuration diagram of an optical imaging lens according to embodiment 1 of the present application;
fig. 2A to 2C show an on-axis chromatic aberration curve, an astigmatism curve, and a distortion curve, respectively, of the optical imaging lens of embodiment 1;
fig. 3 is a schematic diagram showing the structure of an optical imaging lens according to embodiment 2 of the present application;
fig. 4A to 4C show an on-axis chromatic aberration curve, an astigmatism curve, and a distortion curve, respectively, of the optical imaging lens of embodiment 2;
fig. 5 shows a schematic structural view of an optical imaging lens according to embodiment 3 of the present application;
Fig. 6A to 6C show an on-axis chromatic aberration curve, an astigmatism curve, and a distortion curve, respectively, of the optical imaging lens of embodiment 3;
fig. 7 shows a schematic configuration diagram of an optical imaging lens according to embodiment 4 of the present application;
fig. 8A to 8C show an on-axis chromatic aberration curve, an astigmatism curve, and a distortion curve, respectively, of the optical imaging lens of embodiment 4;
fig. 9 shows a schematic configuration diagram of an optical imaging lens according to embodiment 5 of the present application; and
fig. 10A to 10C show an on-axis chromatic aberration curve, an astigmatism curve, and a distortion curve of the optical imaging lens of embodiment 5, respectively.
Detailed Description
For a better understanding of the application, various aspects of the 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 application and is not intended to limit the scope of the 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 the present specification, the expressions of first, second, third, etc. are only used to distinguish one feature from another feature, and do not represent any limitation on the feature. Accordingly, a first lens discussed below may also be referred to as a second lens or a third lens without departing from the teachings of the present application.
In the drawings, the thickness, size, and shape of the lenses have been slightly exaggerated for convenience of explanation. In particular, the spherical or aspherical shape shown in the drawings is shown by way of example. That is, the shape of the spherical or aspherical surface is not limited to the shape of the spherical or aspherical surface shown in the drawings. The figures are merely examples and are 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, then the lens surface is convex at least in the paraxial region; if the lens surface is concave and the concave position is not defined, it means that the lens surface is concave at least in the paraxial region. The surface of each lens closest to the subject is referred to herein as the object side of the lens, and the surface of each lens closest to the imaging plane is referred to as the image side of the lens.
It will be further understood that the terms "comprises," "comprising," "includes," "including," "having," "containing," 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. Furthermore, when a statement such as "at least one of the following" appears after a list of features that are listed, the entire listed feature is modified instead of modifying a separate element in the list. Furthermore, when describing embodiments of the application, use of "may" means "one or more embodiments of the 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, without conflict, the embodiments of the present application and features of the embodiments may be combined with each other. The application will be described in detail below with reference to the drawings in connection with embodiments.
The features, principles, and other aspects of the present application are described in detail below.
The optical imaging lens according to the exemplary embodiment of the present application may include, for example, six lenses, i.e., a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens. The six lenses are sequentially arranged from the object side to the image side along the optical axis.
In an exemplary embodiment, the first lens may have positive or negative optical power; the second lens may have positive or negative optical power; the third lens may have positive optical power; the fourth lens may have positive or negative optical power; the fifth lens may have positive or negative optical power; the sixth lens may have positive or negative optical power.
In an exemplary embodiment, the third lens may have positive optical power. The object-side surface of the third lens element may be concave, and the image-side surface thereof may be convex. The third lens is arranged in the focal power and the surface type, the first lens can effectively reduce the size of the system, the second lens can enable the distribution of the focal power of the system to be more reasonable, and the third lens is important to improving the correcting capability of the aberration of the system and reducing the sensitivity of the system.
In an exemplary embodiment, at least one of the first lens to the sixth lens is made of glass. At least one lens of the first lens to the sixth lens is made of glass material, so that the sensitivity of the lens group to temperature can be effectively reduced, the lens has better temperature drift performance, and the imaging performance of the lens is improved.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy a conditional expression TTL/ImgH <1.25, where TTL is a distance from an object side surface of the first lens to an imaging surface of the optical imaging lens along an optical axis, and ImgH is a half of a diagonal length of an effective pixel area on the imaging surface. By controlling the ratio of the distance from the object side surface of the first lens to the imaging surface of the optical imaging lens along the optical axis to half of the diagonal length of the effective pixel area on the imaging surface in the range, the total size of the optical lens can be effectively reduced, the ultrathin characteristic and miniaturization of the optical lens can be realized, and the optical lens can be better suitable for more ultrathin electronic products in the market. More specifically, TTL and ImgH can satisfy 1< TTL/ImgH <1.25. Illustratively, TTL may satisfy 6.2mm < TTL < 7.7mm and ImgH may satisfy 5.1mm < ImgH < 6.2mm.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy a conditional expression of 5mm < ImgH, where ImgH is half the diagonal length of the effective pixel region on the imaging surface of the optical imaging lens. By controlling the value of half of the diagonal line length of the effective pixel area on the imaging surface of the optical imaging lens to be in the range, the imaging effect of the large imaging surface of the system can be realized, and the optical performance of the system is further improved. More specifically, imgH may satisfy 5.1mm < ImgH < 6.2mm.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy the condition 1< TD/SD <1.3, where TD is a distance from an object side surface of the first lens to an image side surface of the sixth lens along the optical axis, and SD is a distance from a stop in the optical imaging lens to the image side surface of the sixth lens along the optical axis. The ratio of the distance from the object side surface of the first lens to the image side surface of the sixth lens along the optical axis to the distance from the diaphragm in the optical imaging lens to the image side surface of the sixth lens along the optical axis is controlled within the range, so that the positions of the lenses can be reasonably distributed, and the imaging quality of the system can be effectively improved. More specifically, TD and SD may satisfy 1.05< TD/SD <1.2.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy the condition BFL/EPD <0.5, wherein BFL is a distance along the optical axis from the image side surface of the sixth lens to the imaging surface of the optical imaging lens, and EPD is an entrance pupil diameter of the optical imaging lens. The ratio of the distance from the image side surface of the sixth lens to the imaging surface of the optical imaging lens along the optical axis to the entrance pupil diameter of the optical imaging lens is controlled within the range, so that the characteristic of a large image surface of the system is realized, and meanwhile, the actual processing difficulty caused by too short back focus of the lens can be avoided.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression 0.9< f/(sl×tan (Semi-FOV)) <1, where f is an effective focal length of the optical imaging lens, SL is a distance from a stop of the optical imaging lens to an imaging surface of the optical imaging lens along an optical axis, and Semi-FOV is half of a maximum field angle of the optical imaging lens. By controlling the effective focal length of the optical imaging lens and the distance from the aperture of the optical imaging lens to the imaging surface of the optical imaging lens along the optical axis and half of the maximum field angle of the optical imaging lens to satisfy 0.9< f/(sl×tan (Semi-FOV)) <1, the size of the system can be effectively reduced, contributing to balancing the paraxial chromatic aberration and lateral chromatic aberration of the lens. Illustratively, a Semi-FOV may satisfy 43.2 < Semi-FOV < 44.3.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression 0.4< EPD/ImgH <0.6, where EPD is an entrance pupil diameter of the optical imaging lens and ImgH is half of a diagonal length of an effective pixel region on an imaging surface of the optical imaging lens. The ratio of the entrance pupil diameter of the optical imaging lens to half of the diagonal length of the effective pixel area on the imaging surface of the optical imaging lens is controlled in the range, so that the light flux of the lens can be effectively increased, the lens has higher relative illuminance, the imaging quality of the lens in a darker environment can be well improved, and the lens has higher practicability. Illustratively, EPD may satisfy 2.2mm < EPD < 3.0mm and ImgH may satisfy 5.1mm < ImgH < 6.2mm.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression of 0.1< (f2+f3)/(f3+f4) <0.6, where f2 is an effective focal length of the second lens, f3 is an effective focal length of the third lens, and f4 is an effective focal length of the fourth lens. The ratio of the sum of the effective focal length of the second lens to the effective focal length of the third lens to the sum of the effective focal length of the third lens to the effective focal length of the fourth lens is controlled within the range, so that the overall large-image-plane effect is improved, field curvature and chromatic aberration can be avoided, and astigmatism and spherical aberration are not easy to generate.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy the condition of 1< f5/f1<1.5, where f5 is an effective focal length of the fifth lens and f1 is an effective focal length of the first lens. By controlling the ratio of the effective focal length of the fifth lens to the effective focal length of the first lens in the range, the aberration of the whole system can be effectively reduced, the sensitivity of the system is reduced, the problems of poor manufacturability and the like caused by overlarge f1 are avoided, and the problems of poor imaging quality and high sensitivity of the system caused by overlarge aperture of the fifth lens are also avoided. More specifically, f5 and f1 may satisfy 1< f5/f1<1.35.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression 1.5< |f1+f2|/f12<2.2, where f1 is an effective focal length of the first lens, f2 is an effective focal length of the second lens, and f12 is a combined focal length of the first lens and the second lens. The ratio of the absolute value of the sum of the effective focal length of the first lens and the effective focal length of the second lens to the combined focal length of the first lens and the second lens is controlled within the range, so that the imaging quality of the system is improved and the sensitivity of the system is reduced. More specifically, f1, f2, and f12 may satisfy 1.55< |f1+f2|/f12<2.1. Illustratively, f12 may satisfy 6.6mm < f12< 8.2mm.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy the condition-1 < f 6/(r11+r12) <0, where f6 is an effective focal length of the sixth lens, R11 is a radius of curvature of an object side surface of the sixth lens, and R12 is a radius of curvature of an image side surface of the sixth lens. The ratio of the effective focal length of the sixth lens to the sum of the radius of curvature of the object side surface of the sixth lens and the radius of curvature of the image side surface of the sixth lens is controlled within the range, so that the system can have better manufacturability while keeping miniaturization, the post-processing mass production is facilitated, and the practicability of the lens is improved; in addition, aberrations of both the intermediate field of view and the fringe field of view can be effectively corrected. More specifically, f6, R11 and R12 may satisfy-0.9 < f 6/(R11+R12) < -0.5.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy conditional expression 0.3<ET MIN /ET MAX <0.6, wherein ET MIN Is the minimum value of the thickness of each lens edge of the first lens to the sixth lens, ET MAX Is the maximum value of the thickness of each lens edge of the first lens to the sixth lens. By controlling the ratio of the minimum value of the edge thickness of each of the first to sixth lenses to the maximum value of the edge thickness of each of the first to sixth lenses within the range, the system distortion influence amount can be balanced to obtain better formation while reducing the system size and maintaining good workabilityImage effect.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression 0.9< ET4/ET5<1.1, where ET4 is an edge thickness of the fourth lens and ET5 is an edge thickness of the fifth lens. By controlling the ratio of the edge thickness of the fourth lens to the edge thickness of the fifth lens in the range, the sizes of the fourth lens and the fifth lens can be reasonably distributed, the processing process difficulty caused by the fact that the fourth lens and the fifth lens are too thin is effectively avoided, the ghost image risk between the fourth lens and the fifth lens is reduced, and the lens has more excellent imaging quality.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy the condition et6=et MAX Wherein ET6 is the edge thickness of the sixth lens, ET MAX Is the maximum value of the thickness of each lens edge of the first lens to the sixth lens. By controlling the edge thickness of the sixth lens to be equal to the maximum value of the edge thickness of each of the first to sixth lenses, that is, by optimizing the edge thickness of the sixth lens to be the maximum edge thickness among all the lenses, the sensitivity of the system can be improved, the sensitivity of the system can be reduced, and the process processability of the system can be improved.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression 0.8< (ct1+et1)/(ct6+et6) <1.1, where CT1 is a center thickness of the first lens on the optical axis, ET1 is an edge thickness of the first lens, CT6 is a center thickness of the sixth lens on the optical axis, and ET6 is an edge thickness of the sixth lens. The ratio of the sum of the central thickness of the first lens on the optical axis and the edge thickness of the first lens to the sum of the central thickness of the sixth lens on the optical axis and the edge thickness of the sixth lens is controlled within the range, so that the lens group can better balance system chromatic aberration, and the distortion amount of the lens is effectively controlled; and the problems of difficult processing technology, poor system sensitivity and the like caused by over-thin first lens can be effectively avoided.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression 0.8< (t56+bfl)/Σat <1, where T56 is the distance between the fifth lens and the sixth lens on the optical axis, BFL is the distance between the image side surface of the sixth lens and the imaging surface of the optical imaging lens along the optical axis, Σat is the sum of the distances between any adjacent two lenses of the first lens to the sixth lens on the optical axis. The ratio of the sum of the interval distance between the fifth lens and the sixth lens on the optical axis and the distance between the image side surface of the sixth lens and the imaging surface of the optical imaging lens along the optical axis to the sum of the interval distances between any two adjacent lenses of the first lens and the sixth lens on the optical axis is controlled within the range, so that the size of the system is reduced, the distances between the lenses are effectively distributed, and the lens has higher processability.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression 0.7< Σat/Σct <1, where Σat is a sum of distances between any adjacent two lenses of the first lens to the sixth lens on the optical axis, Σct is a sum of thicknesses of centers of the first lens to the sixth lens on the optical axis, respectively. The ratio of the sum of the interval distances between any two adjacent lenses from the first lens to the sixth lens on the optical axis to the sum of the thicknesses of the centers of the first lens to the sixth lens on the optical axis respectively is controlled within the range, so that the meat-thickness ratio of each lens can be reasonably distributed, and the system has better aberration correcting capability.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression 0.9< ct2/CT4<1.2, where CT2 is the center thickness of the second lens on the optical axis and CT4 is the center thickness of the fourth lens on the optical axis. The ratio of the center thickness of the second lens on the optical axis to the center thickness of the fourth lens on the optical axis is controlled within the range, so that the lens group can better balance the chromatic aberration of the system, and meanwhile, the chromatic aberration of the system can be effectively reduced by matching with other lenses.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression of 0.9< (CT 1/CT 3)/(CT 5/CT 1) <1.1, where CT1 is a center thickness of the first lens on the optical axis, CT3 is a center thickness of the third lens on the optical axis, and CT5 is a center thickness of the fifth lens on the optical axis. By controlling the center thickness of the first lens on the optical axis and the center thickness of the third lens on the optical axis and the center thickness of the fifth lens on the optical axis to satisfy 0.9< (CT 1/CT 3)/(CT 5/CT 1) <1.1, the system size can be reduced, good processability can be maintained, the system distortion influence amount can be balanced, and better imaging effect can be obtained by controlling the medium thickness ratio of the first lens, the third lens and the fifth lens in a reasonable range.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression 0.65< (ct1+ct3+ct5)/Σct <0.8, where CT1 is the center thickness of the first lens on the optical axis, CT3 is the center thickness of the third lens on the optical axis, CT5 is the center thickness of the fifth lens on the optical axis, and Σct is the sum of the center thicknesses of the first lens to the sixth lens on the optical axis, respectively. By controlling the ratio of the sum of the center thickness of the first lens on the optical axis and the center thickness of the third lens on the optical axis to the sum of the center thicknesses of the fifth lens on the optical axis to the center thicknesses of the first lens to the sixth lens on the optical axis, respectively, in this range, the thicknesses of the lenses in the system can be reasonably distributed, so that the chromatic aberration and distortion of the system can be effectively balanced while the ultra-thin characteristics are maintained, and difficulties in the processing technology due to the excessive thinness of the lenses can be effectively avoided.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression 0.25< d 11/DT62<0.4, wherein DT11 is the maximum effective radius of the object side surface of the first lens and DT62 is the maximum effective radius of the image side surface of the sixth 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 sixth lens in the range, the first lens element can help to raise the height of the imaging surface of the system and raise the effective focal length of the system; second, enabling the system to better balance aberrations of the intermediate field of view; third, the small head characteristics of the system can be maintained.
In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression V1-V2>50, where V1 is the abbe number of the first lens and V2 is the abbe number of the second lens. By controlling the difference between the Abbe number of the first lens and the Abbe number of the second lens in the range, the first lens is a low refractive index lens, and the second lens is a high refractive index lens, so that light rays have better converging effect, chromatic aberration correction is facilitated, and overall imaging performance of the system is improved.
In an exemplary embodiment, the effective focal length f of the optical imaging lens may be, for example, in the range of 5.1mm to 6.4mm, the effective focal length f1 of the first lens may be, for example, in the range of 5.1mm to 6.4mm, the effective focal length f2 of the second lens may be, for example, in the range of-21.9 mm to-16.6 mm, the effective focal length f3 of the third lens may be, for example, in the range of 19.7mm to 24.1mm, the effective focal length f4 of the fourth lens may be, for example, in the range of-13.4 mm to-10.2 mm, the effective focal length f5 of the fifth lens may be, for example, in the range of 5.5mm to 7.2mm, and the effective focal length f6 of the sixth lens may be, for example, in the range of-5.5 mm to-4.2 mm.
In an exemplary embodiment, the optical imaging lens may further include at least one diaphragm. The diaphragm can restrict the light path and control the intensity of light. The diaphragm may be provided at an appropriate position as required, for example, between the object side and the first lens. Optionally, the optical imaging lens may further include a filter for correcting color deviation and/or a protective glass for protecting a photosensitive element located on the imaging surface.
The optical imaging lens according to the above embodiment of the present application may employ a plurality of lenses, for example, six lenses as described above. Through reasonable distribution of focal power, surface type, material, center thickness and on-axis interval etc. between each lens, can provide an optical imaging lens with characteristics such as big image plane, ultra-thin and high imaging quality, be favorable to satisfying the high demand in market better.
In an embodiment of the present application, at least one of the mirrors of the first lens element, the second lens element, the third lens element, the fourth lens element, the fifth lens element and the sixth lens element may have at least one aspherical mirror surface, i.e., at least one aspherical mirror surface may be included in the object-side surface of the first lens element to the image-side surface of the sixth lens element. The aspherical 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 a better radius of curvature characteristic, and has advantages of improving distortion aberration and improving astigmatic aberration. By adopting the aspherical lens, aberration occurring during imaging can be eliminated as much as possible, thereby improving imaging quality. Optionally, at least one of an object side surface and an image side surface of each of the first lens, the second lens, the third lens, the fourth lens, the fifth lens, and the sixth lens is an aspherical mirror surface. Optionally, the object side surface and the image side surface of each of the first lens, the second lens, the third lens, the fourth lens, the fifth lens and the sixth lens are aspherical mirror surfaces.
However, it will be appreciated by those skilled in the art that the number of lenses making up the optical imaging lens can be varied to achieve the various results and advantages described in this specification without departing from the technical solution claimed in the present application. For example, although six lenses are described as an example in the embodiment, the optical imaging lens is not limited to include six lenses. The optical imaging lens may also include other numbers of lenses, if desired.
Specific examples of the optical imaging lens applicable to the above-described embodiments are further described below with reference to the accompanying 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 configuration diagram of an optical imaging lens according to embodiment 1 of the present application.
As shown in fig. 1, the optical imaging lens sequentially includes, from an object side to an image side along an optical axis: stop STO, first lens E1, second lens E2, third lens E3, fourth lens E4, fifth lens E5, sixth lens E6, and filter E7.
The first lens element E1 has positive refractive power, wherein an object-side surface S1 thereof is convex, and an image-side surface S2 thereof is concave. The second lens element E2 has negative refractive power, wherein an object-side surface S3 thereof is convex, and an image-side surface S4 thereof is concave. The third lens element E3 has positive refractive power, wherein an object-side surface S5 thereof is concave, and an image-side surface S6 thereof is convex. The fourth lens element E4 has negative refractive power, wherein an object-side surface S7 thereof is concave, and an image-side surface S8 thereof is concave. The fifth lens element E5 has positive refractive power, wherein an object-side surface S9 thereof is convex, and an image-side surface S10 thereof is convex. The sixth lens element E6 has negative refractive power, wherein an object-side surface S11 thereof is convex and an image-side surface S12 thereof is concave. The filter E7 has an object side surface S13 and an image side surface S14. The optical imaging lens has an imaging surface S15, and light from an object sequentially passes through the respective surfaces S1 to S14 and is finally imaged on the imaging surface S15.
Table 1 shows basic parameters of the optical imaging lens of embodiment 1, in which the unit of curvature radius and thickness/distance is millimeter (mm).
TABLE 1
In embodiment 1, the object side surface and the image side surface of any one of the first lens E1 to the sixth lens E6 are aspherical, and the surface profile x of each aspherical lens can be defined by, but not limited to, the following aspherical formula:
wherein x is the distance vector height from the vertex of the aspheric surface when the aspheric surface is at the position with the height h along the optical axis direction; c is the paraxial curvature of the aspheric surface, c=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 aspherical i-th order. The following tables 2-1 and 2-2 give the higher order coefficients A that can be used for each of the aspherical mirror faces S1 to S12 in example 1 4 、A 6 、A 8 、A 10 、A 12 、A 14 、A 16 、A 18 、A 20 、A 22 、A 24 、A 26 、A 28 And A 30 。
Face number A4 A6 A8 A10 A12 A14 A16
S1 -8.9243E-03 9.9695E-02 -4.9467E-01 1.5470E+00 -3.1694E+00 4.3954E+00 -4.1937E+00
S2 -1.5663E-02 -5.8798E-03 9.0458E-02 -3.4757E-01 7.8790E-01 -1.1464E+00 1.1052E+00
S3 -4.3355E-02 7.2520E-03 6.6462E-02 -3.7050E-02 -8.6945E-01 4.0315E+00 -9.4197E+00
S4 -2.0688E-02 -1.1980E-01 1.2436E+00 -6.7561E+00 2.4147E+01 -5.9626E+01 1.0467E+02
S5 -2.5040E-02 -1.3977E-01 5.0475E-01 -7.3231E-01 -2.2949E+00 1.4209E+01 -3.5394E+01
S6 -2.3276E-02 -1.2333E-01 4.3670E-01 -1.0842E+00 1.8596E+00 -2.2688E+00 1.9956E+00
S7 -9.0103E-02 -1.7031E-02 2.2837E-01 -3.4639E-01 9.7996E-02 4.9160E-01 -9.5507E-01
S8 -1.4634E-01 5.6014E-02 9.3444E-02 -2.3252E-01 2.8765E-01 -2.2942E-01 1.2545E-01
S9 -4.8488E-02 3.7260E-03 6.7858E-03 -7.1212E-03 3.0596E-03 -3.9640E-04 -1.8775E-04
S10 3.2152E-02 -2.1508E-02 9.3284E-03 -4.1574E-03 1.3848E-03 -2.2664E-04 -1.5154E-05
S11 -1.9413E-01 7.9138E-02 -2.4618E-02 7.9243E-03 -3.5716E-03 1.4475E-03 -3.9706E-04
S12 -2.2111E-01 1.1793E-01 -5.2545E-02 1.8268E-02 -4.8391E-03 9.5628E-04 -1.3898E-04
TABLE 2-1
TABLE 2-2
Fig. 2A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 1, which indicates the focus deviation of light rays of different wavelengths after passing through the lens. Fig. 2B shows an astigmatism curve of the optical imaging lens of embodiment 1, which represents meridional image plane curvature and sagittal image plane curvature. Fig. 2C shows a distortion curve of the optical imaging lens of embodiment 1, which represents distortion magnitude values corresponding to different angles of view. As can be seen from fig. 2A to 2C, the optical imaging lens provided in 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 portions similar to embodiment 1 will be omitted for brevity. Fig. 3 shows a schematic configuration of an optical imaging lens according to embodiment 2 of the present application.
As shown in fig. 3, the optical imaging lens sequentially includes, from an object side to an image side along an optical axis: stop STO, first lens E1, second lens E2, third lens E3, fourth lens E4, fifth lens E5, sixth lens E6, and filter E7.
The first lens element E1 has positive refractive power, wherein an object-side surface S1 thereof is convex, and an image-side surface S2 thereof is concave. The second lens element E2 has negative refractive power, wherein an object-side surface S3 thereof is convex, and an image-side surface S4 thereof is concave. The third lens element E3 has positive refractive power, wherein an object-side surface S5 thereof is concave, and an image-side surface S6 thereof is convex. The fourth lens element E4 has negative refractive power, wherein an object-side surface S7 thereof is concave, and an image-side surface S8 thereof is concave. The fifth lens element E5 has positive refractive power, wherein an object-side surface S9 thereof is convex, and an image-side surface S10 thereof is convex. The sixth lens element E6 has negative refractive power, wherein an object-side surface S11 thereof is convex and an image-side surface S12 thereof is concave. The filter E7 has an object side surface S13 and an image side surface S14. The optical imaging lens has an imaging surface S15, and light from an object sequentially passes through the respective surfaces S1 to S14 and is finally imaged on the imaging surface S15.
Table 3 shows basic parameters of the optical imaging lens of embodiment 2, in which the unit of curvature radius and thickness/distance is millimeter (mm). Tables 4-1 and 4-2 show the higher order coefficients A that can be used for each of the aspherical mirror surfaces S1 to S12 in example 2 4 、A 6 、A 8 、A 10 、A 12 、A 14 、A 16 、A 18 、A 20 、A 22 、A 24 、A 26 、A 28 And A 30 Wherein each aspherical surface profile can be defined by the formula (1) given in the above-described embodiment 1.
TABLE 3 Table 3
Face number A4 A6 A8 A10 A12 A14 A16
S1 1.3879E-03 -1.0609E-03 1.9833E-02 -7.9276E-02 1.7577E-01 -2.4472E-01 2.2545E-01
S2 -8.3569E-03 -2.6627E-03 2.3056E-02 -6.1259E-02 9.9086E-02 -1.0371E-01 7.1764E-02
S3 -2.6967E-02 2.0277E-02 -6.3670E-02 2.1653E-01 -5.0039E-01 8.1431E-01 -9.5699E-01
S4 -1.5313E-02 -1.7102E-02 1.9264E-01 -8.8021E-01 2.5853E+00 -5.1338E+00 7.1097E+00
S5 -2.1808E-02 -5.8257E-03 -6.0615E-02 3.5644E-01 -1.1131E+00 2.1871E+00 -2.8970E+00
S6 -2.0640E-02 -4.7838E-03 -2.3322E-02 9.4445E-02 -1.9133E-01 2.3852E-01 -1.9670E-01
S7 -5.8676E-02 1.5092E-02 1.9284E-02 -1.0190E-02 -4.0859E-02 8.6334E-02 -8.5916E-02
S8 -8.4672E-02 2.8298E-02 1.5878E-02 -3.6091E-02 3.3513E-02 -1.9187E-02 7.4065E-03
S9 -2.8517E-02 1.9402E-03 6.8017E-04 -5.8688E-04 1.0346E-04 4.5964E-05 -2.8459E-05
S10 1.4494E-02 -6.9693E-03 1.9818E-03 -6.1548E-04 1.3479E-04 -8.8258E-06 -3.3010E-06
S11 -1.0744E-01 2.8936E-02 -5.4431E-03 9.4270E-04 -2.8452E-04 8.7550E-05 -1.7591E-05
S12 -1.2172E-01 4.3842E-02 -1.3073E-02 3.0262E-03 -5.3170E-04 6.9590E-05 -6.6966E-06
TABLE 4-1
Face number A18 A20 A22 A24 A26 A28 A30
S1 -1.4000E-01 5.8271E-02 -1.5742E-02 2.5625E-03 -2.1231E-04 5.3566E-06 0.0000E+00
S2 -3.2917E-02 9.8438E-03 -1.8395E-03 1.9626E-04 -9.3960E-06 0.0000E+00 0.0000E+00
S3 8.2123E-01 -5.1424E-01 2.3192E-01 -7.3163E-02 1.5270E-02 -1.8871E-03 1.0412E-04
S4 -6.9847E+00 4.8904E+00 -2.4198E+00 8.2514E-01 -1.8405E-01 2.4104E-02 -1.4003E-03
S5 2.6707E+00 -1.7335E+00 7.8832E-01 -2.4537E-01 4.9654E-02 -5.8623E-03 3.0467E-04
S6 1.1093E-01 -4.3100E-02 1.1362E-02 -1.9460E-03 1.9704E-04 -9.3554E-06 6.6370E-08
S7 5.3670E-02 -2.2748E-02 6.6758E-03 -1.3402E-03 1.7593E-04 -1.3615E-05 4.7094E-07
S8 -1.9955E-03 3.7715E-04 -4.9075E-05 4.1894E-06 -2.1136E-07 4.7820E-09 -3.4327E-14
S9 6.8842E-06 -9.3302E-07 7.4148E-08 -3.2087E-09 5.4838E-11 2.8267E-13 -3.0911E-15
S10 1.0250E-06 -1.4296E-07 1.1904E-08 -6.2088E-10 1.9807E-11 -3.5185E-13 2.6606E-15
S11 2.2751E-06 -1.9613E-07 1.1461E-08 -4.5024E-10 1.1421E-11 -1.6934E-13 1.1168E-15
S12 4.6840E-07 -2.3425E-08 8.1373E-10 -1.8617E-11 2.5200E-13 -1.5316E-15 9.7245E-20
TABLE 4-2
Fig. 4A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 2, which indicates the focus deviation of light rays of different wavelengths after passing through the lens. Fig. 4B shows an astigmatism curve of the optical imaging lens of embodiment 2, which represents meridional image plane curvature and sagittal image plane curvature. Fig. 4C shows a distortion curve of the optical imaging lens of embodiment 2, which represents distortion magnitude values corresponding to different angles of view. As can be seen from fig. 4A to 4C, the optical imaging lens provided in 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 configuration diagram of an optical imaging lens according to embodiment 3 of the present application.
As shown in fig. 5, the optical imaging lens sequentially includes, from an object side to an image side along an optical axis: stop STO, first lens E1, second lens E2, third lens E3, fourth lens E4, fifth lens E5, sixth lens E6, and filter E7.
The first lens element E1 has positive refractive power, wherein an object-side surface S1 thereof is convex, and an image-side surface S2 thereof is concave. The second lens element E2 has negative refractive power, wherein an object-side surface S3 thereof is convex, and an image-side surface S4 thereof is concave. The third lens element E3 has positive refractive power, wherein an object-side surface S5 thereof is concave, and an image-side surface S6 thereof is convex. The fourth lens element E4 has negative refractive power, wherein an object-side surface S7 thereof is concave, and an image-side surface S8 thereof is concave. The fifth lens element E5 has positive refractive power, wherein an object-side surface S9 thereof is convex, and an image-side surface S10 thereof is convex. The sixth lens element E6 has negative refractive power, wherein an object-side surface S11 thereof is convex and an image-side surface S12 thereof is concave. The filter E7 has an object side surface S13 and an image side surface S14. The optical imaging lens has an imaging surface S15, and light from an object sequentially passes through the respective surfaces S1 to S14 and is finally imaged on the imaging surface S15.
Table 5 shows basic parameters of the optical imaging lens of embodiment 3, in which the unit of curvature radius and thickness/distance is millimeter (mm). Tables 6-1 and 6-2 show the higher order term coefficients A that can be used for each of the aspherical mirror faces S1 to S12 in example 3 4 、A 6 、A 8 、A 10 、A 12 、A 14 、A 16 、A 18 、A 20 、A 22 、A 24 、A 26 、A 28 And A 30 Wherein each aspherical surface profile can be defined by the formula (1) given in the above-described embodiment 1.
TABLE 5
TABLE 6-1
Face number A18 A20 A22 A24 A26 A28 A30
S1 -4.6940E+00 2.8114E+00 -1.1023E+00 2.6475E-01 -3.3622E-02 1.5069E-03 0.0000E+00
S2 -4.5416E-01 2.3775E-01 -7.5055E-02 1.2790E-02 -8.7769E-04 0.0000E+00 0.0000E+00
S3 7.2172E+00 -9.3404E+00 7.5244E+00 -3.8913E+00 1.2563E+00 -2.2992E-01 1.8111E-02
S4 -2.7482E+02 2.7001E+02 -1.8934E+02 9.2511E+01 -2.9943E+01 5.7744E+00 -5.0264E-01
S5 4.3628E+01 -4.6911E+01 3.4079E+01 -1.6520E+01 5.0948E+00 -8.9613E-01 6.7421E-02
S6 3.3340E-01 -3.2417E-01 1.8333E-01 -6.9609E-02 1.8011E-02 -2.9203E-03 2.2333E-04
S7 1.4216E+00 -9.1286E-01 4.0048E-01 -1.1935E-01 2.3174E-02 -2.6485E-03 1.3524E-04
S8 -6.8691E-02 1.8689E-02 -3.4338E-03 4.0363E-04 -2.7128E-05 7.8095E-07 -8.1353E-12
S9 -2.9703E-04 4.0929E-05 -3.7046E-06 2.0039E-07 -5.3184E-09 4.4324E-11 -7.0178E-13
S10 1.6165E-05 -3.9701E-06 5.2855E-07 -4.2592E-08 2.0547E-09 -5.4116E-11 5.9404E-13
S11 5.7251E-05 -7.2763E-06 6.2348E-07 -3.5815E-08 1.3261E-09 -2.8672E-11 2.7549E-13
S12 1.0515E-05 -7.5870E-07 3.8011E-08 -1.2536E-09 2.4447E-11 -2.1388E-13 1.9570E-17
TABLE 6-2
Fig. 6A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 3, which indicates the focus deviation of light rays of different wavelengths after passing through the lens. Fig. 6B shows an astigmatism curve of the optical imaging lens of embodiment 3, which represents meridional image plane curvature and sagittal image plane curvature. Fig. 6C shows a distortion curve of the optical imaging lens of embodiment 3, which represents distortion magnitude values corresponding to different angles of view. As can be seen from fig. 6A to 6C, the optical imaging lens provided in 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 configuration diagram of an optical imaging lens according to embodiment 4 of the present application.
As shown in fig. 7, the optical imaging lens sequentially includes, from an object side to an image side along an optical axis: stop STO, first lens E1, second lens E2, third lens E3, fourth lens E4, fifth lens E5, sixth lens E6, and filter E7.
The first lens element E1 has positive refractive power, wherein an object-side surface S1 thereof is convex, and an image-side surface S2 thereof is concave. The second lens element E2 has negative refractive power, wherein an object-side surface S3 thereof is convex, and an image-side surface S4 thereof is concave. The third lens element E3 has positive refractive power, wherein an object-side surface S5 thereof is concave, and an image-side surface S6 thereof is convex. The fourth lens element E4 has negative refractive power, wherein an object-side surface S7 thereof is concave, and an image-side surface S8 thereof is concave. The fifth lens element E5 has positive refractive power, wherein an object-side surface S9 thereof is convex, and an image-side surface S10 thereof is convex. The sixth lens element E6 has negative refractive power, wherein an object-side surface S11 thereof is convex and an image-side surface S12 thereof is concave. The filter E7 has an object side surface S13 and an image side surface S14. The optical imaging lens has an imaging surface S15, and light from an object sequentially passes through the respective surfaces S1 to S14 and is finally imaged on the imaging surface S15.
Table 7 shows basic parameters of the optical imaging lens of embodiment 4, in which the unit of curvature radius and thickness/distance is millimeter (mm). Tables 8-1 and 8-2 show the higher order term coefficients A that can be used for each of the aspherical mirror faces S1 to S12 in example 4 4 、A 6 、A 8 、A 10 、A 12 、A 14 、A 16 、A 18 、A 20 、A 22 、A 24 、A 26 、A 28 And A 30 Wherein each aspherical surface profile can be defined by the formula (1) given in the above-described embodiment 1.
TABLE 7
Face number A4 A6 A8 A10 A12 A14 A16
S1 -3.2650E-03 5.5182E-02 -2.5757E-01 7.0849E-01 -1.0621E+00 5.1021E-01 1.0624E+00
S2 -1.3330E-02 -2.7249E-03 5.3170E-02 -2.0884E-01 4.8837E-01 -7.3991E-01 7.4968E-01
S3 -4.8489E-02 1.3010E-01 -8.7713E-01 4.2297E+00 -1.3278E+01 2.8254E+01 -4.1789E+01
S4 -1.3020E-02 -2.0158E-01 1.8426E+00 -9.7987E+00 3.5531E+01 -9.1112E+01 1.6853E+02
S5 -1.9491E-02 -2.2606E-01 1.0598E+00 -3.1834E+00 5.1844E+00 -1.8691E+00 -1.0829E+01
S6 -3.0146E-02 -9.0430E-03 -3.6521E-01 1.9652E+00 -5.5998E+00 1.0181E+01 -1.2555E+01
S7 -9.5273E-02 -1.5861E-02 1.7261E-01 -1.8223E-01 -1.4862E-01 7.6506E-01 -1.2109E+00
S8 -1.3918E-01 3.1355E-02 1.3059E-01 -2.7463E-01 3.3460E-01 -2.7045E-01 1.4964E-01
S9 -3.7360E-02 -1.0038E-02 2.1128E-02 -1.9786E-02 1.1725E-02 -4.6686E-03 1.2820E-03
S10 2.5672E-02 -2.0760E-02 1.0966E-02 -5.8878E-03 2.3333E-03 -5.5728E-04 6.2309E-05
S11 -1.7457E-01 5.8991E-02 -1.0859E-02 1.0033E-03 -8.2828E-04 5.9184E-04 -1.9631E-04
S12 -1.9467E-01 9.4013E-02 -3.7574E-02 1.1839E-02 -2.8843E-03 5.2974E-04 -7.1950E-05
TABLE 8-1
Face number A18 A20 A22 A24 A26 A28 A30
S1 -2.3468E+00 2.1950E+00 -1.1400E+00 3.2154E-01 -3.9324E-02 3.0930E-04 0.0000E+00
S2 -5.1299E-01 2.3378E-01 -6.7598E-02 1.1048E-02 -7.4731E-04 0.0000E+00 0.0000E+00
S3 4.3439E+01 -3.1702E+01 1.6043E+01 -5.5016E+00 1.2396E+00 -1.7644E-01 1.3629E-02
S4 -2.2680E+02 2.2170E+02 -1.5545E+02 7.6019E+01 -2.4565E+01 4.7039E+00 -4.0322E-01
S5 2.6868E+01 -3.3245E+01 2.5591E+01 -1.2680E+01 3.9200E+00 -6.8258E-01 5.0330E-02
S6 1.0764E+01 -6.4366E+00 2.6430E+00 -7.1544E-01 1.1717E-01 -9.5271E-03 1.8880E-04
S7 1.1401E+00 -7.1407E-01 3.0635E-01 -8.9321E-02 1.6960E-02 -1.8935E-03 9.4335E-05
S8 -5.7414E-02 1.5226E-02 -2.7285E-03 3.1369E-04 -2.0722E-05 5.9067E-07 -5.9370E-12
S9 -2.4569E-04 3.2499E-05 -2.8392E-06 1.4925E-07 -3.8957E-09 3.3870E-11 -5.2569E-13
S10 3.3643E-06 -2.2577E-06 3.5800E-07 -3.0565E-08 1.4981E-09 -3.9143E-11 4.1602E-13
S11 3.8016E-05 -4.7411E-06 3.9487E-07 -2.1949E-08 7.8459E-10 -1.6356E-11 1.5142E-13
S12 7.1198E-06 -5.0406E-07 2.4782E-08 -8.0173E-10 1.5325E-11 -1.3132E-13 1.1597E-17
TABLE 8-2
Fig. 8A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 4, which indicates the focus deviation of light rays of different wavelengths after passing through the lens. Fig. 8B shows an astigmatism curve of the optical imaging lens of embodiment 4, which represents meridional image plane curvature and sagittal image plane curvature. Fig. 8C shows a distortion curve of the optical imaging lens of embodiment 4, which represents distortion magnitude values corresponding to different angles of view. As can be seen from fig. 8A to 8C, the optical imaging lens provided in 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 configuration of an optical imaging lens according to embodiment 5 of the present application.
As shown in fig. 9, the optical imaging lens sequentially includes, from an object side to an image side along an optical axis: stop STO, first lens E1, second lens E2, third lens E3, fourth lens E4, fifth lens E5, sixth lens E6, and filter E7.
The first lens element E1 has positive refractive power, wherein an object-side surface S1 thereof is convex, and an image-side surface S2 thereof is concave. The second lens element E2 has negative refractive power, wherein an object-side surface S3 thereof is convex, and an image-side surface S4 thereof is concave. The third lens element E3 has positive refractive power, wherein an object-side surface S5 thereof is concave, and an image-side surface S6 thereof is convex. The fourth lens element E4 has negative refractive power, wherein an object-side surface S7 thereof is concave, and an image-side surface S8 thereof is concave. The fifth lens element E5 has positive refractive power, wherein an object-side surface S9 thereof is convex, and an image-side surface S10 thereof is convex. The sixth lens element E6 has negative refractive power, wherein an object-side surface S11 thereof is convex and an image-side surface S12 thereof is concave. The filter E7 has an object side surface S13 and an image side surface S14. The optical imaging lens has an imaging surface S15, and light from an object sequentially passes through the respective surfaces S1 to S14 and is finally imaged on the imaging surface S15.
Table 9 shows basic parameters of the optical imaging lens of embodiment 5, in which the unit of curvature radius and thickness/distance is millimeter (mm). Tables 10-1 and 10-2 show the higher order term coefficients A that can be used for each of the aspherical mirror faces S1 to S12 in example 5 4 、A 6 、A 8 、A 10 、A 12 、A 14 、A 16 、A 18 、A 20 、A 22 、A 24 、A 26 、A 28 And A 30 Wherein each aspherical surface profile can be defined by the formula (1) given in the above-described embodiment 1.
TABLE 9
TABLE 10-1
Face number A18 A20 A22 A24 A26 A28 A30
S1 -5.2708E+00 3.5591E+00 -1.5630E+00 4.1276E-01 -5.4211E-02 1.7733E-03 0.0000E+00
S2 6.5268E-01 -1.5406E-01 7.7169E-04 4.6955E-03 0.0000E+00 0.0000E+00 0.0000E+00
S3 3.3322E+01 -2.6868E+01 1.4731E+01 -5.3514E+00 1.2418E+00 -1.7664E-01 1.3645E-02
S4 -2.4600E+02 2.3471E+02 -1.6106E+02 7.7381E+01 -2.4685E+01 4.6935E+00 -4.0226E-01
S5 -5.4062E+00 -1.0794E+01 1.4918E+01 -9.2763E+00 3.2054E+00 -5.8463E-01 4.2576E-02
S6 1.5060E+01 -8.3125E+00 3.1664E+00 -7.9809E-01 1.2221E-01 -9.3844E-03 1.8886E-04
S7 1.2944E+00 -7.7896E-01 3.2314E-01 -9.1782E-02 1.7115E-02 -1.8930E-03 9.4306E-05
S8 -8.6354E-02 2.2705E-02 -4.0159E-03 4.4904E-04 -2.7910E-05 6.9422E-07 -7.1368E-12
S9 -4.3467E-04 5.9792E-05 -5.3661E-06 2.8485E-07 -7.1031E-09 3.3902E-11 -5.2621E-13
S10 -4.2314E-05 3.1446E-06 -5.5778E-08 -1.2682E-08 1.3041E-09 -5.6096E-11 9.9580E-13
S11 5.1865E-05 -6.4826E-06 5.4457E-07 -3.0611E-08 1.1074E-09 -2.3354E-11 2.1848E-13
S12 7.5450E-06 -5.3188E-07 2.6101E-08 -8.4472E-10 1.6186E-11 -1.3930E-13 1.2354E-17
TABLE 10-2
Fig. 10A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 5, which indicates the focus deviation of light rays of different wavelengths after passing through the lens. Fig. 10B shows an astigmatism curve of the optical imaging lens of embodiment 5, which represents meridional image plane curvature and sagittal image plane curvature. Fig. 10C shows a distortion curve of the optical imaging lens of embodiment 5, which represents distortion magnitude values corresponding to different angles of view. As can be seen from fig. 10A to 10C, the optical imaging lens provided in embodiment 5 can achieve good imaging quality.
Further, in embodiments 1 to 5, the effective focal length f of the optical imaging lens, the effective focal length values f1 to f6 of the respective lenses, the combined focal length f12 of the first lens and the second lens, the distance TTL from the object side surface of the first lens to the imaging surface of the optical imaging lens along the optical axis, half the diagonal length ImgH of the effective pixel area on the imaging surface, half the maximum field angle Semi-FOV of the optical imaging lens, and the entrance pupil diameter EPD of the optical imaging lens are shown in table 11.
Parameters/embodiments 1 2 3 4 5
f(mm) 5.29 6.33 5.29 5.29 5.20
f1(mm) 5.24 6.26 5.17 5.24 5.36
f2(mm) -18.82 -21.78 -17.71 -17.91 -16.78
f3(mm) 20.26 23.95 23.22 23.42 19.80
f4(mm) -10.31 -13.21 -12.10 -12.17 -12.02
f5(mm) 5.64 7.03 5.95 5.97 5.61
f6(mm) -4.59 -5.40 -4.51 -4.58 -4.39
f12(mm) 6.70 8.10 6.71 6.82 7.18
TTL(mm) 6.38 7.63 6.30 6.34 6.22
ImgH(mm) 5.15 6.18 5.18 5.23 5.23
Semi-FOV(°) 43.31 43.44 43.52 43.59 44.18
EPD(mm) 2.84 2.88 2.65 2.46 2.31
TABLE 11
The conditional expressions in examples 1 to 5 satisfy the conditions shown in table 12, respectively.
Condition/example 1 2 3 4 5
TTL/ImgH 1.24 1.23 1.22 1.21 1.19
TD/SD 1.12 1.08 1.10 1.09 1.07
BFL/EPD 0.36 0.40 0.37 0.39 0.41
f/(SL×TAN(Semi-FOV)) 0.97 0.93 0.96 0.94 0.91
EPD/ImgH 0.55 0.47 0.51 0.47 0.44
(f2+f3)/(f3+f4) 0.14 0.20 0.50 0.49 0.39
f5/f1 1.08 1.12 1.15 1.14 1.05
|f1+f2|/f12 2.03 1.92 1.87 1.86 1.59
f6/(R11+R12) -0.78 -0.71 -0.69 -0.70 -0.67
ET MIN /ET MAX 0.42 0.58 0.40 0.44 0.43
ET4/ET5 1.01 1.06 0.95 0.97 1.08
(CT1+ET1)/(CT6+ET6) 1.07 1.04 0.93 0.90 0.83
(T56+BFL)/∑AT 0.91 0.88 0.88 0.86 0.87
∑AT/∑CT 0.72 0.76 0.82 0.86 0.90
CT2/CT4 0.99 1.02 1.13 1.16 1.16
(CT1/CT3)/(CT5/CT1) 1.00 0.91 1.01 0.99 1.02
(CT1+CT3+CT5)/∑CT 0.70 0.69 0.68 0.67 0.67
DT11/DT62 0.36 0.30 0.33 0.30 0.29
V1-V2 58.10 58.10 58.10 58.10 58.10
Table 12
The application also provides an imaging device provided with an electron-sensitive element for imaging, which can be a photosensitive coupling element (Charge Coupled Device, CCD) or a complementary metal-oxide-semiconductor element (Complementary Metal Oxide Semiconductor, CMOS). The imaging device may be a stand alone imaging device such as a digital camera or an imaging module integrated on a mobile electronic device such as a cell phone. The imaging device is equipped with the optical imaging lens described above.
The above description is only illustrative of the preferred embodiments of the present application and of the principles of the technology employed. It will be appreciated by those skilled in the art that the scope of the application is not limited to the specific combination of the above technical features, but also encompasses other technical features which may be combined with any combination of the above technical features or their equivalents without departing from the spirit of the application. Such as the above-mentioned features and the technical features disclosed in the present application (but not limited to) having similar functions are replaced with each other.

Claims (18)

1. The optical imaging lens is characterized by sequentially comprising, from an object side to an image side along an optical axis:
a first lens having positive optical power;
a second lens having negative optical power;
the object side surface of the third lens is a concave surface, and the image side surface of the third lens is a convex surface;
a fourth lens having negative optical power;
a fifth lens having positive optical power; and
a sixth lens having a negative optical power,
the optical imaging lens satisfies the following conditions:
TTL/ImgH<1.25，
0.1<(f2+f3)/(f3+f4)<0.6，
1< f5/f1<1.5, and
5mm < ImgH, wherein TTL is the distance from the object side surface of the first lens to the imaging surface of the optical imaging lens along the optical axis, imgH is half of the diagonal length of an effective pixel area on the imaging surface, f1 is the effective focal length of the first lens, f2 is the effective focal length of the second lens, f3 is the effective focal length of the third lens, f4 is the effective focal length of the fourth lens, and f5 is the effective focal length of the fifth lens;
at least one lens of the first lens to the sixth lens is made of glass;
the number of lenses having optical power in the optical imaging lens is six.
2. The optical imaging lens of claim 1, further comprising a stop, wherein a distance TD along the optical axis from an object side of the first lens to an image side of the sixth lens and a distance SD along the optical axis from the stop to the image side of the sixth lens satisfy:
1<TD/SD<1.3。
3. The optical imaging lens of claim 1, wherein a distance BFL from an image side surface of the sixth lens to an imaging surface of the optical imaging lens along the optical axis and an entrance pupil diameter EPD of the optical imaging lens satisfy:
BFL/EPD<0.5。
4. the optical imaging lens of claim 1, further comprising a stop, an effective focal length f of the optical imaging lens, a distance SL of the stop to an imaging surface of the optical imaging lens along the optical axis, and a half of a maximum field angle Semi-FOV of the optical imaging lens satisfy:
0.9<f/(SL×TAN(Semi-FOV))<1。
5. the optical imaging lens of claim 1, wherein an entrance pupil diameter EPD of the optical imaging lens and a half of a diagonal length ImgH of an effective pixel region on an imaging surface of the optical imaging lens satisfy:
0.4<EPD/ImgH<0.6。
6. the optical imaging lens of claim 1, wherein an effective focal length f1 of the first lens, an effective focal length f2 of the second lens, and a combined focal length f12 of the first lens and the second lens satisfy:
1.5<|f1+f2|/f12<2.2。
7. the optical imaging lens of claim 1, wherein an effective focal length f6 of the sixth lens, a radius of curvature R11 of an object-side surface of the sixth lens, and a radius of curvature R12 of an image-side surface of the sixth lens satisfy:
-1<f6/(R11+R12)<0。
8. The optical imaging lens of any of claims 1 to 7, wherein a minimum ET of a thickness of each lens edge of the first to sixth lenses MIN And the maximum value ET of the edge thickness of each of the first lens to the sixth lens MAX The method meets the following conditions:
0.3<ET MIN /ET MAX <0.6。
9. the optical imaging lens of any of claims 1 to 7, wherein an edge thickness ET4 of the fourth lens and an edge thickness ET5 of the fifth lens satisfy:
0.9<ET4/ET5<1.1。
10. the optical imaging lens of any of claims 1 to 7, wherein an edge thickness ET6 of the sixth lens and the first to sixth lensesMaximum value ET of edge thickness of each lens MAX The method meets the following conditions:
ET6=ET MAX 。
11. the optical imaging lens according to any one of claims 1 to 7, wherein a center thickness CT1 of the first lens on the optical axis, an edge thickness ET1 of the first lens, a center thickness CT6 of the sixth lens on the optical axis, and an edge thickness ET6 of the sixth lens satisfy:
0.8<(CT1+ET1)/(CT6+ET6)<1.1。
12. the optical imaging lens according to any one of claims 1 to 7, wherein a sum Σat of a separation distance T56 of the fifth lens and the sixth lens on the optical axis, a distance BFL of an image side surface of the sixth lens to an imaging surface of the optical imaging lens along the optical axis, and a separation distance of any adjacent two lenses of the first lens to the sixth lens on the optical axis satisfies:
0.8<(T56+BFL)/∑AT<1。
13. The optical imaging lens according to any one of claims 1 to 7, wherein a sum Σat of separation distances on the optical axis of any adjacent two lenses of the first to sixth lenses and a sum Σct of center thicknesses on the optical axis of the first to sixth lenses, respectively, satisfy:
0.7<∑AT/∑CT<1。
14. the optical imaging lens according to any one of claims 1 to 7, wherein a center thickness CT2 of the second lens on the optical axis and a center thickness CT4 of the fourth lens on the optical axis satisfy:
0.9<CT2/CT4<1.2。
15. the optical imaging lens according to any one of claims 1 to 7, wherein a center thickness CT1 of the first lens on the optical axis, a center thickness CT3 of the third lens on the optical axis, and a center thickness CT5 of the fifth lens on the optical axis satisfy:
0.9<(CT1/CT3)/(CT5/CT1)<1.1。
16. the optical imaging lens according to any one of claims 1 to 7, wherein a sum Σct of a center thickness CT1 of the first lens on the optical axis, a center thickness CT3 of the third lens on the optical axis, a center thickness CT5 of the fifth lens on the optical axis, and center thicknesses Σct of the first to sixth lenses on the optical axis, respectively, satisfies:
0.65<(CT1+CT3+CT5)/∑CT<0.8。
17. The optical imaging lens of any of claims 1 to 7, wherein a maximum effective radius DT11 of an object-side surface of the first lens and a maximum effective radius DT62 of an image-side surface of the sixth lens satisfy:
0.25<DT11/DT62<0.4。
18. the optical imaging lens according to any one of claims 1 to 7, wherein an abbe number V1 of the first lens and an abbe number V2 of the second lens satisfy:
V1-V2>50。
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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105319687A (en) * 2014-07-07 2016-02-10 先进光电科技股份有限公司 Optical imaging system
US20190154970A1 (en) * 2017-11-18 2019-05-23 AAC Technologies Pte. Ltd. Camera Optical Lens
CN111239978A (en) * 2018-12-13 2020-06-05 浙江舜宇光学有限公司 Optical imaging lens
CN215264209U (en) * 2021-08-02 2021-12-21 浙江舜宇光学有限公司 Optical imaging lens

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105319687A (en) * 2014-07-07 2016-02-10 先进光电科技股份有限公司 Optical imaging system
US20190154970A1 (en) * 2017-11-18 2019-05-23 AAC Technologies Pte. Ltd. Camera Optical Lens
CN111239978A (en) * 2018-12-13 2020-06-05 浙江舜宇光学有限公司 Optical imaging lens
CN215264209U (en) * 2021-08-02 2021-12-21 浙江舜宇光学有限公司 Optical imaging lens

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