CN217213295U - Camera lens - Google Patents
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- CN217213295U CN217213295U CN202220506387.8U CN202220506387U CN217213295U CN 217213295 U CN217213295 U CN 217213295U CN 202220506387 U CN202220506387 U CN 202220506387U CN 217213295 U CN217213295 U CN 217213295U
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Abstract
The utility model provides a camera lens includes in order by going into light side to light-emitting side: a first lens element with refractive power; a second lens element with refractive power; a third lens element with refractive power; the fourth lens has refractive power, and the surface of the fourth lens, facing the light incidence side, is in a convex shape; the fifth lens has refractive power, and the surface of the fifth lens, facing the light emergent side, is in a convex shape; the sixth lens element with negative refractive power has a concave surface facing the light incident side; wherein, the entrance pupil diameter EPD of camera lens satisfies: 3mm < EPD <4 mm; the effective focal length f5 of the fifth lens and half semi-Fov of the maximum field angle of the camera lens meet the following conditions: 4mm < f5 tan (semi-Fov) <6.5 mm; the air gap T56 between the fifth lens and the sixth lens on the optical axis and the effective focal length f of the camera lens satisfy that: 3< f/T56< 5. The utility model provides an among the prior art take a photograph of the camera lens have the poor problem of formation of image quality.
Description
Technical Field
The utility model relates to an optical imaging equipment technical field particularly, relates to a camera lens.
Background
In recent years, with the wide use of portable electronic products, people are also continuously making higher demands on the performance of camera modules on the portable electronic products, and the market expects that the imaging of the portable electronic products is clearer, the performance of the lens is better, and the portable electronic products can be well used under different environmental conditions.
That is, the imaging lens in the related art has a problem of poor imaging quality.
SUMMERY OF THE UTILITY MODEL
A primary object of the present invention is to provide a camera lens to solve the problem of poor imaging quality of camera lenses in the prior art.
In order to achieve the above object, according to an aspect of the present invention, there is provided an image pickup lens including, in order from an incident light side to a light exit side: a first lens element with refractive power; a second lens element with refractive power; a third lens element with refractive power; the fourth lens has refractive power, and the surface of the fourth lens, facing the light incidence side, is in a convex shape; the fifth lens has refractive power, and the surface of the fifth lens, facing the light emergent side, is in a convex shape; the sixth lens element with negative refractive power has a concave surface facing the light incident side; wherein, the entrance pupil diameter EPD of camera lens satisfies: 3mm < EPD <4 mm; the effective focal length f5 of the fifth lens and half semi-Fov of the maximum field angle of the camera lens meet the following conditions: 4mm < f5 tan (semi-Fov) <6.5 mm; the air gap T56 between the fifth lens and the sixth lens on the optical axis and the effective focal length f of the camera lens satisfy the following conditions: 3< f/T56< 5.
Further, the distance TTL along the optical axis from the surface of the first lens facing the light incident side to the imaging surface of the imaging lens, the sum Σ CT of the central thicknesses of all the lenses in the first lens to the sixth lens, and half ImgH of the diagonal length of the effective pixel region on the imaging surface satisfy: 0.5< (TTL-Sigma CT)/ImgH < 1.5.
Further, an effective focal length f5 of the fifth lens and an effective focal length f of the imaging lens satisfy: 0.4< f5/f < 1.5.
Further, the distance TTL along the optical axis from the surface of the first lens facing the light incident side to the imaging surface of the imaging lens, the effective focal length f of the imaging lens, and the effective focal length f6 of the sixth lens satisfy: 3.0< TTL/(f + f6) < 6.0.
Further, a combined focal length f123 of the first lens, the second lens and the third lens and a combined focal length f2345 of the second lens, the third lens, the fourth lens and the fifth lens satisfy: 1.0< f123/f2345< 2.5.
Further, the fourth lens and the fifth lens satisfy, between an air gap T45 on the optical axis of the imaging lens, an air gap T56 on the optical axis of the fifth lens and the sixth lens, and a center thickness CT5 of the fifth lens: 1.5< (T45+ T56)/CT5< 3.5.
Further, the curvature radius R10 of the surface of the fifth lens facing the light-out side and the curvature radius R11 of the surface of the sixth lens facing the light-in side satisfy that: -0.5< (R10-R11)/(R10+ R11) < 0.5.
Further, the center thickness CT1 of the first lens, the air gap T12 of the first lens and the second lens on the optical axis, the center thickness CT2 of the second lens, the air gap T23 of the second lens and the third lens on the optical axis, and the center thickness CT3 of the third lens satisfy: 6.0< (CT1+ T12+ CT2+ T23+ CT3)/CT2< 8.5.
Further, the edge thickness ET6 at the maximum effective radius of the sixth lens and the curvature radius R11 of the surface of the sixth lens facing the light inlet side meet the following condition: -0.8< ET6/R11< 0.
Further, an on-axis distance SAG51 from the intersection point of the surface of the fifth lens facing the light entrance side and the optical axis to the effective radius vertex of the surface of the fifth lens facing the light entrance side, an on-axis distance SAG61 from the intersection point of the surface of the sixth lens facing the light entrance side and the optical axis to the effective radius vertex of the surface of the sixth lens facing the light entrance side, and an on-axis distance SAG21 from the intersection point of the surface of the second lens facing the light entrance side and the optical axis to the effective radius vertex of the surface of the second lens facing the light entrance side satisfy: -0.5< SAG51/(SAG61-SAG21) < 0.5.
Further, an on-axis distance SAG61 between an intersection point of a surface of the sixth lens facing the light-entering side and the optical axis and an effective radius vertex of the surface of the sixth lens facing the light-entering side and an on-axis distance SAG62 between an intersection point of the surface of the sixth lens facing the light-exiting side and the optical axis and an effective radius vertex of the surface of the sixth lens facing the light-exiting side satisfy: 1.0< SAG61/SAG62< 2.5.
Further, the edge thickness at the maximum effective radius of the fourth lens ET4, the center thickness of the fourth lens CT4, the edge thickness at the maximum effective radius of the third lens ET3, and the center thickness of the third lens CT3 satisfy: -1.0< ET4/CT4-ET3/CT3< 1.0.
Further, the center thickness CT3 of the third lens, the air gap T34 of the third lens and the fourth lens on the optical axis, the center thickness CT4 of the fourth lens, and the sum Sigma AT of the air gaps of any adjacent lenses of the first lens to the sixth lens on the optical axis satisfy 0< (CT3+ T34+ CT 4)/. Sigma AT < 0.7.
Further, a sum Σ CT of center thicknesses of all lenses of the first lens to the sixth lens and a distance TD on the optical axis from a surface of the first lens toward the light-entrance side to a surface of the sixth lens toward the light-exit side satisfy: 0.2< ∑ CT/TD < 1.0.
According to the utility model discloses an on the other hand provides a camera lens, includes in order by going into light side to light-emitting side: a first lens element with refractive power; a second lens element with refractive power; a third lens element with refractive power; the fourth lens has refractive power, and the surface of the fourth lens, facing the light incidence side, is in a convex shape; the fifth lens has refractive power, and the surface of the fifth lens, facing the light emergent side, is in a convex shape; the sixth lens element with negative refractive power has a concave surface facing the light incident side; wherein, the entrance pupil diameter EPD of camera lens satisfies: 3mm < EPD <4 mm; the effective focal length f5 of the fifth lens and half semi-Fov of the maximum field angle of the camera lens meet the following conditions: 4mm < f5 tan (semi-Fov) <6.5 mm; the air gap T45 of the fourth lens and the fifth lens on the optical axis of the camera lens, the air gap T56 of the fifth lens and the sixth lens on the optical axis and the center thickness CT5 of the fifth lens satisfy that: 1.5< (T45+ T56)/CT5< 3.5.
Further, the distance TTL along the optical axis from the surface of the first lens facing the light incident side to the imaging surface of the imaging lens, the sum Σ CT of the central thicknesses of all the lenses in the first lens to the sixth lens, and half ImgH of the diagonal length of the effective pixel region on the imaging surface satisfy: 0.5< (TTL-Sigma CT)/ImgH < 1.5.
Further, an effective focal length f5 of the fifth lens and an effective focal length f of the imaging lens satisfy: 0.4< f5/f < 1.5.
Further, the distance TTL along the optical axis from the surface of the first lens facing the light incident side to the imaging surface of the imaging lens, the effective focal length f of the imaging lens, and the effective focal length f6 of the sixth lens satisfy: 3.0< TTL/(f + f6) < 6.0.
Further, a combined focal length f123 of the first lens, the second lens and the third lens and a combined focal length f2345 of the second lens, the third lens, the fourth lens and the fifth lens satisfy: 1.0< f123/f2345< 2.5.
Further, the curvature radius R10 of the surface of the fifth lens facing the light-out side and the curvature radius R11 of the surface of the sixth lens facing the light-in side satisfy that: -0.5< (R10-R11)/(R10+ R11) < 0.5.
Further, the center thickness CT1 of the first lens, the air gap T12 of the first lens and the second lens on the optical axis, the center thickness CT2 of the second lens, the air gap T23 of the second lens and the third lens on the optical axis, and the center thickness CT3 of the third lens satisfy: 6.0< (CT1+ T12+ CT2+ T23+ CT3)/CT2< 8.5.
Further, the edge thickness ET6 at the maximum effective radius of the sixth lens and the curvature radius R11 of the surface of the sixth lens facing the light inlet side meet the following condition: -0.8< ET6/R11< 0.
Further, an on-axis distance SAG51 from the intersection point of the surface of the fifth lens facing the light entrance side and the optical axis to the effective radius vertex of the surface of the fifth lens facing the light entrance side, an on-axis distance SAG61 from the intersection point of the surface of the sixth lens facing the light entrance side and the optical axis to the effective radius vertex of the surface of the sixth lens facing the light entrance side, and an on-axis distance SAG21 from the intersection point of the surface of the second lens facing the light entrance side and the optical axis to the effective radius vertex of the surface of the second lens facing the light entrance side satisfy: -0.5< SAG51/(SAG61-SAG21) < 0.5.
Further, an on-axis distance SAG61 between an intersection point of a surface of the sixth lens facing the light-entering side and the optical axis and an effective radius vertex of the surface of the sixth lens facing the light-entering side and an on-axis distance SAG62 between an intersection point of the surface of the sixth lens facing the light-exiting side and the optical axis and an effective radius vertex of the surface of the sixth lens facing the light-exiting side satisfy: 1.0< SAG61/SAG62< 2.5.
Further, the on-axis distance SAG22 between the intersection point of the surface of the second lens facing the light-emitting side and the optical axis and the effective radius vertex of the surface of the second lens facing the light-emitting side and the edge thickness ET2 at the maximum effective radius of the second lens satisfy that: -0.5< SAG22/ET2< 1.5.
Further, the edge thickness at the maximum effective radius of the fourth lens ET4, the center thickness of the fourth lens CT4, the edge thickness at the maximum effective radius of the third lens ET3, and the center thickness of the third lens CT3 satisfy: -1.0< ET4/CT4-ET3/CT3< 1.0.
Further, the central thickness CT3 of the third lens, the air gap T34 of the third lens and the fourth lens on the optical axis, the central thickness CT4 of the fourth lens and the sum Sigma AT of the air gaps of any adjacent lenses of the first lens to the sixth lens on the optical axis satisfy 0< (CT3+ T34+ CT 4)/SigmaAT < 0.7.
Further, a sum Σ CT of center thicknesses of all lenses of the first lens to the sixth lens and a distance TD on the optical axis from a surface of the first lens toward the light-entrance side to a surface of the sixth lens toward the light-exit side satisfy: 0.2< ∑ CT/TD < 1.0.
Use the technical scheme of the utility model, camera lens includes first lens, second lens, third lens, fourth lens, fifth lens and sixth lens in order by income light side to light-emitting side. The first lens element with refractive power; the second lens element with refractive power; the third lens element with refractive power; the fourth lens has refractive power, and the surface of the fourth lens, facing the light incidence side, is convex; the fifth lens element with refractive power has a convex surface facing the light emergent side; the sixth lens element with negative refractive power has a concave surface facing the light incident side; wherein, the entrance pupil diameter EPD of camera lens satisfies: 3mm < EPD <4 mm; the effective focal length f5 of the fifth lens and half semi-Fov of the maximum field angle of the camera lens meet the following conditions: 4mm < f5 tan (semi-Fov) <6.5 mm; the air gap T56 between the fifth lens and the sixth lens on the optical axis and the effective focal length f of the camera lens satisfy that: 3< f/T56< 5.
By distributing the refractive power of part of the lenses of the camera lens and designing the surface type of the lenses, the low-order aberration of the camera lens can be effectively balanced, the sensitivity of the tolerance of the camera lens can be reduced, the miniaturization of the camera lens is kept, and the imaging quality of the camera lens is ensured, so that the camera lens has the characteristics of a large image plane and a large aperture. By limiting the EPD to a reasonable range, the luminous flux of the imaging lens can be ensured. And f5 star (semi-Fov) is controlled within a reasonable range, so that the maximum field angle of the imaging lens can be controlled within a reasonable range to ensure the characteristic of a large image plane of the imaging lens. By limiting the f/T56 within a reasonable range, the focal length of the camera lens can be ensured within a reasonable range, and the imaging quality of the camera lens is ensured.
Drawings
The accompanying drawings, which form a part of the present application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic view showing a configuration of an 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 imaging lens in fig. 1;
fig. 6 is a schematic structural view of an imaging lens according to a second example of the present invention;
fig. 7 to 10 show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve, respectively, of the imaging lens in fig. 6;
fig. 11 is a schematic structural view of an imaging lens according to a third example of the present invention;
fig. 12 to 15 show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve, respectively, of the imaging lens in fig. 11;
fig. 16 is a schematic view showing a configuration of an imaging lens according to a fourth example of the present invention;
fig. 17 to 20 show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve, respectively, of the imaging lens in fig. 16;
fig. 21 is a schematic view showing a configuration of an imaging lens according to a fifth example of the present invention;
fig. 22 to 25 show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve, respectively, of the imaging lens in fig. 21;
fig. 26 is a schematic structural view of an imaging lens according to a sixth example of the present invention;
fig. 27 to 30 show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve, respectively, of the imaging lens in fig. 26;
fig. 31 is a schematic view showing a configuration of an imaging lens according to a seventh example of the present invention;
fig. 32 to 35 show an axial chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve of the imaging lens in fig. 31, respectively;
fig. 36 is a schematic view showing a configuration of an imaging lens according to example eight of the present invention;
fig. 37 to 40 show an axial chromatic aberration curve, an astigmatism curve, a distortion curve, and a chromatic aberration of magnification curve of the imaging lens in fig. 36, respectively.
Wherein the figures include the following reference numerals:
e1, first lens; s1, the surface of the first lens facing the light incidence side; s2, the surface of the first lens facing the light-emitting side; e2, second lens; s3, the surface of the second lens facing the light incidence side; s4, the surface of the second lens facing the light-emitting side; e3, third lens; s5, the surface of the third lens facing the light incidence side; s6, the surface of the third lens facing the light-emitting side; e4, fourth lens; s7, the fourth lens faces the surface of the light incidence side; s8, the surface of the fourth lens faces the light emitting side; e5, fifth lens; s9, the surface of the fifth lens facing the light incidence side; s10, the surface of the fifth lens facing the light-emitting side; e6, sixth lens; s11, the surface of the sixth lens facing the light incidence side; s12, the surface of the sixth lens facing the light-emitting side; e7, a filter plate; s13, the surface of the filter plate facing to the light incident side; s14, enabling the filter plate to face the surface of the light emergent side; and S15, 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 accompanying drawings in conjunction with embodiments.
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 application, where the contrary is not intended, the use of directional words such as "upper, lower, top and bottom" is generally with respect to the orientation shown in the drawings, or with respect to the component itself in the vertical, perpendicular or gravitational direction; 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 invention.
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 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. With respect to the surface facing the light incident side, a convex shape is determined when the R value is positive, and a concave shape is determined when the R value is negative; the surface facing the light exit side is determined to be concave when the R value is positive, and convex when the R value is negative.
In order to solve the problem that the camera lens has poor imaging quality among the prior art, the utility model provides a camera lens.
Example one
As shown in fig. 1 to 40, the image pickup lens includes, in order from the light-in side to the light-out side, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens. The first lens element with refractive power; the second lens element with refractive power; the third lens element with refractive power; the fourth lens has refractive power, and the surface of the fourth lens, facing the light incidence side, is convex; the fifth lens element with refractive power has a convex surface facing the light emergent side; the sixth lens element with negative refractive power has a concave surface facing the light incident side; wherein, the entrance pupil diameter EPD of camera lens satisfies: 3mm < EPD <4 mm; the effective focal length f5 of the fifth lens and half semi-Fov of the maximum field angle of the camera lens meet the following conditions: 4mm < f5 tan (semi-Fov) <6.5 mm; the air gap T56 between the fifth lens and the sixth lens on the optical axis and the effective focal length f of the camera lens satisfy that: 3< f/T56< 5.
By distributing the refractive power of part of the lenses of the camera lens and designing the surface type of the lenses, the low-order aberration of the camera lens can be effectively balanced, the sensitivity of the tolerance of the camera lens can be reduced, the miniaturization of the camera lens is kept, and the imaging quality of the camera lens is ensured, so that the camera lens has the characteristics of a large image plane and a large aperture. By limiting the EPD to a reasonable range, the luminous flux of the imaging lens can be ensured. And f5 star (semi-Fov) is controlled within a reasonable range, so that the maximum field angle of the imaging lens can be controlled within a reasonable range to ensure the characteristic of a large image plane of the imaging lens. By limiting the f/T56 within a reasonable range, the focal length of the camera lens can be ensured within a reasonable range, and the imaging quality of the camera lens is ensured.
Preferably, the entrance pupil diameter EPD of the imaging lens satisfies: 3.1mm < EPD <3.6 mm; the effective focal length f5 of the fifth lens and half semi-Fov of the maximum field angle of the camera lens meet the following conditions: 4.2mm < f5 tan (semi-Fov) <6.0 mm; the air gap T56 between the fifth lens and the sixth lens on the optical axis and the effective focal length f of the camera lens satisfy that: 3.2< f/T56< 4.8.
In the embodiment, a distance TTL along the optical axis from the surface of the first lens facing the light incident side to the imaging surface of the imaging lens, a sum Σ CT of center thicknesses of all lenses in the first lens to the sixth lens, and a half ImgH of a diagonal length of an effective pixel region on the imaging surface satisfy: 0.5< (TTL-Sigma CT)/ImgH < 1.5. By limiting (TTL- ∑ CT)/ImgH within a reasonable range, the CRA design of the camera lens and the balance of aberrations can be better realized. Preferably, 0.6< (TTL-sigma CT)/ImgH < 1.0.
In the present embodiment, the effective focal length f5 of the fifth lens and the effective focal length f of the imaging lens satisfy: 0.4< f5/f < 1.5. By limiting f5/f within a reasonable range, the distribution of the refractive power of the camera lens can be better realized, and the axial aberration of the camera lens can be better corrected. Preferably 0.6< f5/f < 1.3.
In the embodiment, the distance TTL along the optical axis from the surface of the first lens facing the light incident side to the imaging surface of the imaging lens, the effective focal length f of the imaging lens, and the effective focal length f6 of the sixth lens satisfy: 3.0< TTL/(f + f6) < 6.0. Through TTL/(f + f6) limitation in reasonable range, wide-angle performance of the camera lens is guaranteed, and meanwhile miniaturization of the system is guaranteed. Preferably, 3.1< TTL/(f + f6) < 5.8.
In this embodiment, a combined focal length f123 of the first lens, the second lens, and the third lens and a combined focal length f2345 of the second lens, the third lens, the fourth lens, and the fifth lens satisfy: 1.0< f123/f2345< 2.5. Through the design of the front five lenses, the characteristic of a large aperture is favorably realized by the camera lens, and the aberration of the camera lens is better corrected. Preferably, 1.2< f123/f2345< 2.2.
In the present embodiment, the air gap T45 of the fourth lens and the fifth lens on the optical axis of the imaging lens, the air gap T56 of the fifth lens and the sixth lens on the optical axis, and the center thickness CT5 of the fifth lens satisfy: 1.5< (T45+ T56)/CT5< 3.5. By limiting (T45+ T56)/CT5 to a reasonable range, it is helpful to correct the axial chromatic aberration and chromatic spherical aberration of the imaging lens. Preferably, 1.6< (T45+ T56)/CT5< 3.3.
In the present embodiment, the radius of curvature R10 of the surface of the fifth lens facing the light exit side and the radius of curvature R11 of the surface of the sixth lens facing the light entrance side satisfy: -0.5< (R10-R11)/(R10+ R11) < 0.5. By limiting (R10-R11)/(R10+ R11) within a reasonable range, curvature of field and astigmatism of the camera lens can be better corrected, and higher imaging quality can be obtained. Preferably, -0.3< (R10-R11)/(R10+ R11) < 0.4.
In the present embodiment, the central thickness CT1 of the first lens, the air gap T12 of the first lens and the second lens on the optical axis, the central thickness CT2 of the second lens, the air gap T23 of the second lens and the third lens on the optical axis, and the central thickness CT3 of the third lens satisfy: 6.0< (CT1+ T12+ CT2+ T23+ CT3)/CT2< 8.5. By limiting (CT1+ T12+ CT2+ T23+ CT3)/CT2 within a reasonable range, the characteristic of a large aperture can be better realized, which is beneficial to correcting the axial aberration of the imaging lens. Preferably, 6.5< (CT1+ T12+ CT2+ T23+ CT3)/CT2< 8.2.
In the present embodiment, the edge thickness ET6 at the maximum effective radius of the sixth lens and the curvature radius R11 of the surface of the sixth lens facing the light incident side satisfy: -0.8< ET6/R11< 0. By limiting ET6/R11 to a reasonable range, the shape of the sixth lens can be controlled to better correct for curvature of field and distortion. Preferably, -0.6< ET6/R11< -0.1.
In the present embodiment, the on-axis distance SAG51 between the intersection point of the surface of the fifth lens facing the light entrance side and the optical axis and the effective radius vertex of the surface of the fifth lens facing the light entrance side, the on-axis distance SAG61 between the intersection point of the surface of the sixth lens facing the light entrance side and the optical axis and the effective radius vertex of the surface of the sixth lens facing the light entrance side, and the on-axis distance SAG21 between the intersection point of the surface of the second lens facing the light entrance side and the optical axis and the effective radius vertex of the surface of the second lens facing the light entrance side satisfy: -0.5< SAG51/(SAG61-SAG21) < 0.5. By limiting SAG51/(SAG61-SAG21) to a reasonable range, the shapes of the fifth lens and the sixth lens can be limited to better correct off-axis aberrations of the imaging lens, such as correction of field curvature and correction of object astigmatism. Preferably, -0.3< SAG51/(SAG61-SAG21) < 0.45.
In the embodiment, an on-axis distance SAG61 between an intersection point of a surface of the sixth lens facing the light entrance side and the optical axis and an effective radius vertex of the surface of the sixth lens facing the light entrance side and an on-axis distance SAG62 between an intersection point of the surface of the sixth lens facing the light exit side and the optical axis and an effective radius vertex of the surface of the sixth lens facing the light exit side satisfy: 1.0< SAG61/SAG62< 2.5. By limiting SAG61/SAG62 to a reasonable range, the shape of the sixth lens can be limited, and curvature of field and distortion can be better corrected, and the design of the CRA can be better realized. Preferably, 1.2< SAG61/SAG62< 2.2.
In the present embodiment, the edge thickness ET4 at the maximum effective radius of the fourth lens, the center thickness CT4 of the fourth lens, the edge thickness ET3 at the maximum effective radius of the third lens, and the center thickness CT3 of the third lens satisfy: -1.0< ET4/CT4-ET3/CT3< 1.0. The arrangement is favorable for correcting off-axis aberration of the camera lens, such as field curvature, astigmatism, distortion, vertical axis chromatic aberration and the like. Preferably, -0.9< ET4/CT4-ET3/CT3< 0.8.
In the present embodiment, the center thickness CT3 of the third lens, the air gap T34 of the third lens and the fourth lens on the optical axis, the center thickness CT4 of the fourth lens, and the sum Sigma AT of the air gaps of any adjacent lenses of the first lens to the sixth lens on the optical axis satisfy 0< (CT3+ T34+ CT 4)/. Sigma AT < 0.7. By controlling (CT3+ T34+ CT 4)/[ sigma ] AT in a reasonable range, spherical aberration and axial chromatic aberration can be well balanced, and the characteristic of a large aperture can be better realized. Preferably, 0.1< (CT3+ T34+ CT 4)/. Sigma AT < 0.6.
In the present embodiment, a sum Σ CT of center thicknesses of all lenses of the first lens to the sixth lens and a distance TD on the optical axis from a surface of the first lens toward the light-entrance side to a surface of the sixth lens toward the light-exit side satisfy: 0.2< ∑ CT/TD < 1.0. By controlling the sigma CT/TD within a reasonable range, the balance of focal length, axial chromatic aberration and chromatic spherical aberration is facilitated, so that better imaging quality is obtained. Preferably, 0.4< ∑ CT/TD < 0.8.
Example two
As shown in fig. 1 to 40, the image pickup lens includes, in order from the light-in side to the light-out side, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens. The first lens element with refractive power; the second lens element with refractive power; the third lens element with refractive power; the fourth lens has refractive power, and the surface of the fourth lens, facing the light incidence side, is convex; the fifth lens element with refractive power has a convex surface facing the light emergent side; the sixth lens element with negative refractive power has a concave surface facing the light incident side; wherein, the entrance pupil diameter EPD of camera lens satisfies: 3mm < EPD <4 mm; the effective focal length f5 of the fifth lens and half semi-Fov of the maximum field angle of the camera lens meet the following conditions: 4mm < f5 tan (semi-Fov) <6.5 mm; the air gap T45 of the fourth lens and the fifth lens on the optical axis of the camera lens, the air gap T56 of the fifth lens and the sixth lens on the optical axis and the center thickness CT5 of the fifth lens satisfy that: 1.5< (T45+ T56)/CT5< 3.5.
By distributing the refractive power of part of the lenses of the camera lens and designing the surface type of the lenses, the low-order aberration of the camera lens can be effectively balanced, the sensitivity of the tolerance of the camera lens can be reduced, the miniaturization of the camera lens is kept, and the imaging quality of the camera lens is ensured, so that the camera lens has the characteristics of a large image plane and a large aperture. By limiting the EPD to a reasonable range, the luminous flux of the imaging lens can be ensured. F5 star (semi-Fov) is controlled within a reasonable range, so that the maximum field angle of the imaging lens can be controlled within a reasonable range to ensure the characteristic of a large image plane of the imaging lens. By limiting the f/T56 within a reasonable range, the focal length of the camera lens can be ensured within a reasonable range, and the imaging quality of the camera lens is ensured.
Preferably, the entrance pupil diameter EPD of the imaging lens satisfies: 3.1mm < EPD <3.6 mm; the effective focal length f5 of the fifth lens and half semi-Fov of the maximum field angle of the camera lens meet the following conditions: 4.2mm < f5 tan (semi-Fov) <6.0 mm; the air gap T56 between the fifth lens and the sixth lens on the optical axis and the effective focal length f of the camera lens satisfy that: 3.2< f/T56< 4.8.
In the present embodiment, the air gap T56 on the optical axis between the fifth lens and the sixth lens and the effective focal length f of the imaging lens satisfy: 3< f/T56< 5. By limiting the f/T56 within a reasonable range, the focal length of the camera lens can be ensured within a reasonable range, and the imaging quality of the camera lens is ensured. Preferably 3.2< f/T56< 4.8.
In the embodiment, a distance TTL along the optical axis from the surface of the first lens facing the light incident side to the imaging surface of the imaging lens, a sum Σ CT of center thicknesses of all lenses in the first lens to the sixth lens, and a half ImgH of a diagonal length of an effective pixel region on the imaging surface satisfy: 0.5< (TTL-sigma CT)/ImgH < 1.5. By limiting (TTL- Σ CT)/ImgH within a reasonable range, it is possible to better achieve CRA design of the imaging lens and balance of aberrations. Preferably, 0.6< (TTL-sigma CT)/ImgH < 1.0.
In the present embodiment, the effective focal length f5 of the fifth lens and the effective focal length f of the imaging lens satisfy: 0.4< f5/f < 1.5. By limiting f5/f within a reasonable range, the distribution of the refractive power of the camera lens can be better realized, and the axial aberration of the camera lens can be better corrected. Preferably 0.6< f5/f < 1.3.
In this embodiment, the distance TTL along the optical axis from the surface of the first lens facing the light entrance side to the imaging surface of the imaging lens, the effective focal length f of the imaging lens, and the effective focal length f6 of the sixth lens satisfy: 3.0< TTL/(f + f6) < 6.0. Through TTL/(f + f6) limitation in reasonable range, wide-angle performance of the camera lens is guaranteed, and meanwhile miniaturization of the system is guaranteed. Preferably, 3.1< TTL/(f + f6) < 5.8.
In this embodiment, a combined focal length f123 of the first lens, the second lens, and the third lens and a combined focal length f2345 of the second lens, the third lens, the fourth lens, and the fifth lens satisfy: 1.0< f123/f2345< 2.5. Through the design of the front five lenses, the characteristic of a large aperture is favorably realized by the camera lens, and the aberration of the camera lens is better corrected. Preferably, 1.2< f123/f2345< 2.2.
In the present embodiment, the air gap T45 of the fourth lens and the fifth lens on the optical axis of the imaging lens, the air gap T56 of the fifth lens and the sixth lens on the optical axis, and the center thickness CT5 of the fifth lens satisfy: 1.5< (T45+ T56)/CT5< 3.5. By limiting (T45+ T56)/CT5 to a reasonable range, it is helpful to correct the axial chromatic aberration and chromatic spherical aberration of the imaging lens. Preferably, 1.6< (T45+ T56)/CT5< 3.3.
In the present embodiment, the radius of curvature R10 of the surface of the fifth lens facing the light exit side and the radius of curvature R11 of the surface of the sixth lens facing the light entrance side satisfy: -0.5< (R10-R11)/(R10+ R11) < 0.5. By limiting (R10-R11)/(R10+ R11) within a reasonable range, curvature of field and astigmatism of the photographic lens can be corrected better, and high imaging quality can be obtained. Preferably, -0.3< (R10-R11)/(R10+ R11) < 0.4.
In the present embodiment, the center thickness CT1 of the first lens, the air gap T12 of the first lens and the second lens on the optical axis, the center thickness CT2 of the second lens, the air gap T23 of the second lens and the third lens on the optical axis, and the center thickness CT3 of the third lens satisfy: 6.0< (CT1+ T12+ CT2+ T23+ CT3)/CT2< 8.5. By limiting (CT1+ T12+ CT2+ T23+ CT3)/CT2 within a reasonable range, the characteristic of a large aperture can be better realized, which is beneficial to correcting the axial aberration of the imaging lens. Preferably, 6.5< (CT1+ T12+ CT2+ T23+ CT3)/CT2< 8.2.
In the present embodiment, the edge thickness ET6 at the maximum effective radius of the sixth lens and the curvature radius R11 of the surface of the sixth lens facing the light incident side satisfy: -0.8< ET6/R11< 0. By limiting the ET6/R11 to a reasonable range, the shape of the sixth lens can be controlled to better correct for curvature of field and distortion. Preferably, -0.6< ET6/R11< -0.1.
In the present embodiment, the axial distance SAG51 between the intersection of the surface of the fifth lens facing the light entrance side and the optical axis and the effective radius apex of the surface of the fifth lens facing the light entrance side, the axial distance SAG61 between the intersection of the surface of the sixth lens facing the light entrance side and the optical axis and the effective radius apex of the surface of the sixth lens facing the light entrance side, and the axial distance SAG21 between the intersection of the surface of the second lens facing the light entrance side and the optical axis and the effective radius apex of the surface of the second lens facing the light entrance side satisfy: -0.5< SAG51/(SAG61-SAG21) < 0.5. By limiting SAG51/(SAG61-SAG21) to a reasonable range, the shapes of the fifth lens and the sixth lens can be limited to better correct off-axis aberrations of the imaging lens, such as correction of field curvature and correction of object astigmatism. Preferably, -0.3< SAG51/(SAG61-SAG21) < 0.45.
In the present embodiment, an on-axis distance SAG61 between an intersection point of a surface of the sixth lens facing the light-entering side and the optical axis and an effective radius vertex of the surface of the sixth lens facing the light-entering side and an on-axis distance SAG62 between an intersection point of the surface of the sixth lens facing the light-exiting side and the optical axis and an effective radius vertex of the surface of the sixth lens facing the light-exiting side satisfy: 1.0< SAG61/SAG62< 2.5. By limiting SAG61/SAG62 to a reasonable range, the shape of the sixth lens can be limited, and curvature of field and distortion can be better corrected, and the design of the CRA can be better realized. Preferably, 1.2< SAG61/SAG62< 2.2.
In the present embodiment, the edge thickness ET4 at the maximum effective radius of the fourth lens, the center thickness CT4 of the fourth lens, the edge thickness ET3 at the maximum effective radius of the third lens, and the center thickness CT3 of the third lens satisfy: -1.0< ET4/CT4-ET3/CT3< 1.0. The arrangement is favorable for correcting off-axis aberration of the camera lens, such as field curvature, astigmatism, distortion, vertical axis chromatic aberration and the like. Preferably, -0.9< ET4/CT4-ET3/CT3< 0.8.
In the present embodiment, the center thickness CT3 of the third lens, the air gap T34 of the third lens and the fourth lens on the optical axis, the center thickness CT4 of the fourth lens, and the sum Sigma AT of the air gaps of any adjacent lenses of the first lens to the sixth lens on the optical axis satisfy 0< (CT3+ T34+ CT 4)/. Sigma AT < 0.7. By controlling (CT3+ T34+ CT 4)/[ Sigma ] AT in a reasonable range, spherical aberration and axial chromatic aberration can be well balanced, and the characteristic of a large aperture can be better realized. Preferably, 0.1< (CT3+ T34+ CT 4)/. Sigma AT < 0.6.
In the present embodiment, a sum Σ CT of center thicknesses of all lenses of the first lens to the sixth lens and a distance TD on the optical axis from a surface of the first lens toward the light-entrance side to a surface of the sixth lens toward the light-exit side satisfy: 0.2< ∑ CT/TD < 1.0. By controlling the sigma CT/TD within a reasonable range, the balance of focal length, axial chromatic aberration and chromatic spherical aberration is facilitated, so that better imaging quality is obtained. Preferably, 0.4< ∑ CT/TD < 0.8.
Optionally, the above-described imaging lens may further include a filter for correcting color deviation and/or a protective glass for protecting a photosensitive element located on an image forming surface.
The imaging lens in the present application may employ a plurality of lenses, for example, the above-described six lenses. By reasonably distributing the refractive power, the surface shape, the center thickness of each lens, the on-axis distance between each lens and the like, the imaging quality of the camera lens can be effectively improved, the sensitivity of the camera lens is reduced, and the machinability of the camera lens is improved, so that the camera lens is more beneficial to production and processing and is applicable to portable electronic equipment such as smart phones.
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 a better curvature radius characteristic, 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 making up the imaging lens can be varied to achieve the various results and advantages described in this specification without departing from the claimed subject matter. For example, although six lenses are exemplified in the embodiment, the imaging lens is not limited to including six lenses. The camera lens may also include other numbers of lenses, as desired.
Examples of specific surface types and parameters of the imaging lens applicable to the above embodiments are further described below with reference to the drawings.
It should be noted that any one of the following examples one to eight is applicable to all embodiments of the present application.
Example one
As shown in fig. 1 to 5, an imaging lens of the first example of the present application is described. Fig. 1 shows a schematic configuration diagram of an imaging lens of example one.
As shown in fig. 1, the camera lens sequentially includes, from the light incident side to the light emergent side: a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter E7, and an image forming surface S15.
The first lens element E1 has positive refractive power, and has a convex surface S1 facing the light-incident side and a concave surface S2 facing the light-exit side. The second lens element E2 has negative refractive power, and has a concave surface S3 facing the light-incident side and a convex surface S4 facing the light-exit side. The third lens element E3 has positive refractive power, and has a concave surface S5 facing the light-incident side and a convex surface S6 facing the light-exit side. The fourth lens element E4 has positive refractive power, and has a convex surface S7 facing the light-incident side and a concave surface S8 facing the light-exit side. The fifth lens element E5 has positive refractive power, and its surface facing the light-incident side S9 is convex, and its surface facing the light-exit side S10 is convex. The sixth lens element E6 has negative refractive power, and its surface facing the light-entering side S11 is concave, and its surface facing the light-exiting side S12 is concave. The filter E7 has a surface S13 facing the light entrance side of the filter and a surface S14 facing the light exit side of the filter. The light from the object sequentially passes through the respective surfaces S1 to S14 and is finally imaged on the imaging surface S15.
In this example, the image height ImgH of the imaging lens is 4.81 mm. The total length TTL of the camera lens is 6.65 mm.
Table 1 shows a basic structural parameter table of the imaging lens of example one, in which the units of the radius of curvature, the thickness/distance, and the focal length are all millimeters (mm).
TABLE 1
In the first example, a surface facing the light incident side and a surface facing the light exiting side of any one of the first lens E1 to the sixth lens E6 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 coefficients A4, A6, A8, A10, A12, A14, A16 that can be used for each of the aspherical mirrors S1-S12 in example one.
| Flour mark | A4 | A6 | A8 | A10 | A12 | A14 | A16 |
| S1 | 2.37E-03 | -5.72E-03 | 8.74E-03 | -6.36E-03 | 2.60E-03 | -5.37E-04 | 4.21E-05 |
| S2 | -4.70E-03 | 1.42E-02 | -2.12E-02 | 1.86E-02 | -9.25E-03 | 2.42E-03 | -2.67E-04 |
| S3 | -1.04E-02 | -1.76E-02 | 5.82E-02 | -5.76E-02 | 2.78E-02 | -6.86E-03 | 6.82E-04 |
| S4 | 6.84E-02 | -2.30E-01 | 3.55E-01 | -2.81E-01 | 1.22E-01 | -2.79E-02 | 2.62E-03 |
| S5 | 1.49E-01 | -3.42E-01 | 4.42E-01 | -3.24E-01 | 1.35E-01 | -2.97E-02 | 2.70E-03 |
| S6 | 5.36E-02 | -7.88E-02 | 6.56E-02 | -3.38E-02 | 9.93E-03 | -1.38E-03 | 5.01E-05 |
| S7 | -7.31E-02 | 2.91E-02 | -3.31E-02 | 3.08E-02 | -1.64E-02 | 4.55E-03 | -5.03E-04 |
| S8 | -8.39E-02 | 5.83E-02 | -5.68E-02 | 3.81E-02 | -1.52E-02 | 3.31E-03 | -2.93E-04 |
| S9 | 1.55E-03 | -6.62E-04 | -2.59E-04 | 2.30E-04 | -7.86E-05 | 1.07E-05 | -4.95E-07 |
| S10 | 1.78E-02 | -3.82E-03 | 9.79E-04 | -2.89E-05 | -3.19E-05 | 4.65E-06 | -1.89E-07 |
| S11 | -6.71E-03 | -6.41E-03 | 2.46E-03 | -2.18E-04 | -2.20E-05 | 4.65E-06 | -2.05E-07 |
| S12 | -2.06E-02 | 1.51E-03 | 6.00E-05 | -1.95E-05 | 1.09E-06 | -1.02E-08 | -4.03E-10 |
TABLE 2
Fig. 2 shows an axial chromatic aberration curve of the imaging lens of the first example, which shows the deviation of the focal point of convergence of light rays of different wavelengths after passing through the imaging lens. Fig. 3 shows astigmatism curves of the imaging lens of the first example, which represent meridional field curvature and sagittal field curvature. Fig. 4 shows distortion curves of the imaging lens of the first example, which show distortion magnitude values corresponding to different angles of view. Fig. 5 shows a chromatic aberration of magnification curve of the imaging lens of the first example, which shows the deviation of different image heights on the image formation plane after the light passes through the imaging lens.
As can be seen from fig. 2 to 5, the imaging lens according to the first example can achieve good imaging quality.
Example two
As shown in fig. 6 to 10, an imaging lens of example two of the present application is described. Fig. 6 shows a schematic configuration diagram of an imaging lens of example two.
As shown in fig. 6, the camera lens sequentially includes, from the light incident side to the light emergent side: a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter E7, and an image forming surface S15.
The first lens element E1 has positive refractive power, and has a convex surface S1 facing the light-incident side and a concave surface S2 facing the light-exit side. The second lens element E2 has negative refractive power, and has a convex surface S3 facing the light-incident side and a concave surface S4 facing the light-exit side. The third lens element E3 has negative refractive power, and its surface facing the light-incident side S5 is convex, and its surface facing the light-exit side S6 is concave. The fourth lens element E4 has positive refractive power, and has a convex surface S7 facing the light-incident side and a convex surface S8 facing the light-exit side. The fifth lens element E5 has positive refractive power, and its surface facing the light-incident side S9 is convex, and its surface facing the light-exit side S10 is convex. The sixth lens element E6 has negative refractive power, and its surface facing the light-entering side S11 is concave, and its surface facing the light-exiting side S12 is concave. The filter E7 has a surface S13 facing the light entrance side of the filter and a surface S14 facing the light exit side of the filter. The light from the object sequentially passes through the respective surfaces S1 to S14 and is finally imaged on the imaging surface S15.
In this example, the image height ImgH of the imaging lens is 4.88 mm. The total length TTL of the camera lens is 6.65 mm.
Table 3 shows a basic structural parameter table of the imaging lens of example two, in which the units of the radius of curvature, the thickness/distance, and the focal length 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 one above.
| Flour mark | A4 | A6 | A8 | A10 | A12 | A14 | A16 |
| S1 | 1.49E-03 | 1.65E-04 | 3.10E-04 | 5.14E-05 | 2.22E-05 | -1.88E-05 | 2.59E-06 |
| S2 | -3.44E-03 | 9.10E-03 | -1.49E-02 | 1.26E-02 | -5.74E-03 | 1.28E-03 | -1.06E-04 |
| S3 | 1.78E-02 | -6.18E-02 | 7.46E-02 | -5.82E-02 | 2.92E-02 | -8.38E-03 | 9.97E-04 |
| S4 | 1.96E-02 | -7.70E-02 | 7.87E-02 | -4.43E-02 | 1.78E-02 | -4.32E-03 | 4.14E-04 |
| S5 | -4.23E-02 | -4.03E-03 | -1.99E-02 | 3.19E-02 | -1.78E-02 | 5.01E-03 | -6.02E-04 |
| S6 | -5.33E-02 | 4.72E-02 | -6.41E-02 | 4.96E-02 | -2.11E-02 | 4.66E-03 | -4.02E-04 |
| S7 | -4.63E-02 | 8.50E-03 | 1.27E-02 | -1.70E-02 | 9.12E-03 | -2.34E-03 | 2.26E-04 |
| S8 | -6.20E-02 | 1.37E-02 | -3.22E-03 | -4.34E-06 | 2.26E-04 | -2.06E-05 | -9.22E-07 |
| S9 | -1.06E-02 | 3.36E-04 | -5.14E-04 | 1.55E-04 | -1.93E-05 | 1.18E-06 | -2.94E-08 |
| S10 | 2.17E-02 | -2.96E-03 | -3.72E-04 | 2.04E-04 | -3.06E-05 | 2.00E-06 | -4.57E-08 |
| S11 | 5.08E-03 | -4.16E-03 | 5.00E-04 | 7.14E-04 | -4.78E-04 | 1.75E-04 | -4.41E-05 |
| S12 | -1.63E-02 | 1.67E-03 | -1.13E-04 | 7.57E-06 | -7.19E-07 | 4.04E-08 | -7.38E-10 |
| Flour mark | A18 | A20 | A22 | A24 | A26 | A28 | A30 |
| S1 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 |
| S2 | -2.19E-06 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 |
| S3 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 |
| S4 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 |
| S5 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 |
| S6 | -5.20E-06 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 |
| S7 | 2.07E-06 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 |
| S8 | -7.34E-08 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 |
| S9 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 |
| S10 | -2.03E-10 | -4.89E-12 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 |
| S11 | 7.89E-06 | -1.01E-06 | 9.25E-08 | -5.85E-09 | 2.44E-10 | -6.02E-12 | 6.65E-14 |
| S12 | -2.28E-12 | -4.74E-14 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 |
TABLE 4
Fig. 7 shows an axial chromatic aberration curve of the imaging lens of example two, which shows the deviation of the convergent focus of light rays of different wavelengths after passing through the imaging lens. Fig. 8 shows astigmatism curves representing meridional field curvature and sagittal field curvature of the imaging lens of example two. Fig. 9 shows distortion curves of the imaging lens of example two, which show values of distortion magnitudes corresponding to different angles of view. Fig. 10 shows a chromatic aberration of magnification curve of the imaging lens of the second example, which shows the deviation of different image heights on the image forming surface after the light passes through the imaging lens.
As can be seen from fig. 7 to 10, the imaging lens according to example two can achieve good imaging quality.
EXAMPLE III
As shown in fig. 11 to 15, an imaging lens of example three of the present application is described. Fig. 11 shows a schematic configuration diagram of an imaging lens of example three.
As shown in fig. 11, the image capturing lens sequentially includes, from the light incident side to the light emitting side: a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter E7, and an image forming surface S15.
The first lens element E1 has positive refractive power, and has a convex surface S1 facing the light-incident side and a concave surface S2 facing the light-exit side. The second lens element E2 with negative refractive power has a concave surface S3 facing the light-incident side and a concave surface S4 facing the light-exit side. The third lens element E3 has positive refractive power, and has a concave surface S5 facing the light-incident side and a convex surface S6 facing the light-exit side. The fourth lens element E4 has positive refractive power, and has a convex surface S7 facing the light-incident side and a concave surface S8 facing the light-exit side. The fifth lens element E5 has positive refractive power, and its surface facing the light-incident side S9 is convex, and its surface facing the light-exit side S10 is convex. The sixth lens element E6 has negative refractive power, and a surface S11 of the sixth lens element facing the light-in side is concave, and a surface S12 of the sixth lens element facing the light-out side is concave. The filter E7 has a surface S13 facing the light entrance side of the filter and a surface S14 facing the light exit side of the filter. The light from the object sequentially passes through the respective surfaces S1 to S14 and is finally imaged on the imaging surface S15.
In this example, the image height ImgH of the imaging lens is 4.80 mm. The total length TTL of the camera lens is 6.65 mm.
Table 5 shows a basic structural parameter table of the imaging lens of example three, in which the units of the radius of curvature, thickness/distance, and focal length 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 one above.
TABLE 6
Fig. 12 shows an axial chromatic aberration curve of the imaging lens of example three, which shows the deviation of the convergent focus of light rays of different wavelengths after passing through the imaging lens. Fig. 13 shows astigmatism curves representing meridional field curvature and sagittal field curvature of the imaging lens of example three. Fig. 14 shows distortion curves of the imaging lens of example three, which show distortion magnitude values corresponding to different angles of view. Fig. 15 shows a chromatic aberration of magnification curve of the imaging lens of example three, which represents the deviation of different image heights on the imaging surface after the light passes through the imaging lens.
As can be seen from fig. 12 to 15, the imaging lens according to the third example can achieve good imaging quality.
Example four
As shown in fig. 16 to 20, an imaging lens of the present example four is described. Fig. 16 shows a schematic configuration diagram of an imaging lens of example four.
As shown in fig. 16, the image capturing lens sequentially includes, from the light incident side to the light emitting side: a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter E7, and an image forming surface S15.
The first lens element E1 has positive refractive power, and has a convex surface S1 facing the light-incident side and a concave surface S2 facing the light-exit side. The second lens element E2 has positive refractive power, and has a convex surface S3 facing the light-incident side and a concave surface S4 facing the light-exit side. The third lens element E3 has negative refractive power, and its surface facing the light-incident side S5 is concave, and its surface facing the light-exit side S6 is convex. The fourth lens element E4 has negative refractive power, and a surface S7 of the fourth lens element facing the light-in side is convex, and a surface S8 of the fourth lens element facing the light-out side is concave. The fifth lens element E5 has positive refractive power, and its surface facing the light-incident side S9 is concave, and its surface facing the light-exit side S10 is convex. The sixth lens element E6 has negative refractive power, and its surface facing the light-entering side S11 is concave, and its surface facing the light-exiting side S12 is concave. The filter E7 has a surface S13 of the filter facing the light entrance side and a surface S14 of the filter facing the light exit side. The light from the object sequentially passes through the respective surfaces S1 to S14 and is finally imaged on the imaging surface S15.
In this example, the image height ImgH of the imaging lens is 4.92 mm. The total length TTL of the camera lens is 6.65 mm.
Table 7 shows a basic structural parameter table of the imaging lens of example four, in which the units of the radius of curvature, the thickness/distance, and the focal length 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 one above.
TABLE 8
Fig. 17 shows an on-axis chromatic aberration curve of the imaging lens of example four, which shows the deviation of the convergent focus of light rays of different wavelengths after passing through the imaging lens. Fig. 18 shows astigmatism curves representing meridional field curvature and sagittal field curvature of the imaging lens of example four. Fig. 19 shows distortion curves of the imaging lens of example four, which show values of distortion magnitudes corresponding to different angles of view. Fig. 20 shows a chromatic aberration of magnification curve of the imaging lens of example four, which represents a deviation of different image heights on the imaging surface after light passes through the imaging lens.
As can be seen from fig. 17 to 20, the imaging lens according to example four can achieve good imaging quality.
Example five
As shown in fig. 21 to 25, an imaging lens of example five of the present application is described. Fig. 21 shows a schematic configuration diagram of an imaging lens of example five.
As shown in fig. 21, the image capturing lens sequentially includes, from the light incident side to the light emitting side: a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter E7, and an image forming surface S15.
The first lens element E1 has positive refractive power, and has a convex surface S1 facing the light-incident side and a concave surface S2 facing the light-exit side. The second lens element E2 has negative refractive power, and has a convex surface S3 facing the light-incident side and a concave surface S4 facing the light-exit side. The third lens element E3 has positive refractive power, and has a convex surface S5 facing the light-incident side and a concave surface S6 facing the light-exit side. The fourth lens element E4 has positive refractive power, and a surface S7 of the fourth lens element facing the light-in side is convex, and a surface S8 of the fourth lens element facing the light-out side is convex. The fifth lens element E5 has positive refractive power, and its surface facing the light-incident side S9 is concave, and its surface facing the light-exit side S10 is convex. The sixth lens element E6 has negative refractive power, and its surface facing the light-entering side S11 is concave, and its surface facing the light-exiting side S12 is convex. The filter E7 has a surface S13 facing the light entrance side of the filter and a surface S14 facing the light exit side of the filter. The light from the object sequentially passes through the respective surfaces S1 to S14 and is finally imaged on the imaging surface S15.
In this example, the image height ImgH of the imaging lens is 4.84 mm. The total length TTL of the camera lens is 6.65 mm.
Table 9 shows a basic structural parameter table of the imaging lens of example five, in which the units of the radius of curvature, thickness/distance, and focal length are all millimeters (mm).
TABLE 9
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 one above.
Fig. 22 shows an on-axis chromatic aberration curve of the imaging lens of example five, which shows the deviation of the convergent focus of light rays of different wavelengths after passing through the imaging lens. Fig. 23 shows astigmatism curves representing meridional field curvature and sagittal field curvature of the imaging lens of example five. Fig. 24 shows distortion curves of the imaging lens of example five, which show distortion magnitude values corresponding to different angles of view. Fig. 25 shows a chromatic aberration of magnification curve of the imaging lens of example five, which represents a deviation of different image heights on the imaging surface after light passes through the imaging lens.
As can be seen from fig. 22 to 25, the imaging lens according to example five can achieve good imaging quality.
Example six
As shown in fig. 26 to 30, an imaging lens of example six of the present application is described. Fig. 26 shows a schematic configuration diagram of an imaging lens of example six.
As shown in fig. 26, the camera lens sequentially includes, from the light incident side to the light emergent side: a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter E7, and an image forming surface S15.
The first lens element E1 has positive refractive power, and has a convex surface S1 facing the light-incident side and a concave surface S2 facing the light-exit side. The second lens element E2 has negative refractive power, and has a convex surface S3 facing the light-incident side and a concave surface S4 facing the light-exit side. The third lens element E3 has negative refractive power, and its surface facing the light-incident side S5 is convex, and its surface facing the light-exit side S6 is concave. The fourth lens element E4 has positive refractive power, and has a convex surface S7 facing the light-incident side and a convex surface S8 facing the light-exit side. The fifth lens element E5 has positive refractive power, and a surface S9 of the fifth lens element facing the light-incident side is convex, and a surface S10 of the fifth lens element facing the light-exiting side is convex. The sixth lens element E6 has negative refractive power, and its surface facing the light-entering side S11 is concave, and its surface facing the light-exiting side S12 is concave. The filter E7 has a surface S13 facing the light entrance side of the filter and a surface S14 facing the light exit side of the filter. The light from the object sequentially passes through the respective surfaces S1 to S14 and is finally imaged on the imaging surface S15.
In this example, the image height ImgH of the imaging lens is 4.85 mm. The total length TTL of the camera lens is 6.60 mm.
Table 11 shows a basic configuration parameter table of the imaging lens of example six, in which the units of the radius of curvature, thickness/distance, and focal length are millimeters (mm).
TABLE 11
Table 12 shows the high-order term coefficients that can be used for each of the aspherical mirror surfaces in example six, wherein each aspherical mirror surface type can be defined by formula (1) given in example one above.
TABLE 12
Fig. 27 shows an on-axis chromatic aberration curve of the imaging lens of example six, which shows the deviation of the convergent focal points of light rays of different wavelengths after passing through the imaging lens. Fig. 28 shows astigmatism curves representing meridional field curvature and sagittal field curvature of the imaging lens of example six. Fig. 29 shows distortion curves of the imaging lens of example six, which show distortion magnitude values corresponding to different angles of view. Fig. 30 shows a chromatic aberration of magnification curve of the imaging lens of example six, which represents a deviation of different image heights on the imaging surface after light passes through the imaging lens.
As can be seen from fig. 27 to 30, the imaging lens according to example six can achieve good image quality.
Example seven
As shown in fig. 31 to 35, an imaging lens of example seven of the present application is described. Fig. 31 shows a schematic configuration diagram of an imaging lens of example seven.
As shown in fig. 31, the image capturing lens sequentially includes, from the light incident side to the light emitting side: a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter E7, and an image forming surface S15.
The first lens element E1 has positive refractive power, and a surface S1 of the first lens element facing the light-in side is convex, and a surface S2 of the first lens element facing the light-out side is concave. The second lens element E2 has negative refractive power, and has a concave surface S3 facing the light-incident side and a convex surface S4 facing the light-exit side. The third lens element E3 has positive refractive power, and its surface S5 facing the light incident side is concave, and its surface S6 facing the light emergent side is convex. The fourth lens element E4 has positive refractive power, and has a convex surface S7 facing the light-incident side and a concave surface S8 facing the light-exit side. The fifth lens element E5 has positive refractive power, and its surface facing the light-incident side S9 is convex, and its surface facing the light-exit side S10 is convex. The sixth lens element E6 has negative refractive power, and its surface facing the light-entering side S11 is concave, and its surface facing the light-exiting side S12 is concave. The filter E7 has a surface S13 facing the light entrance side of the filter and a surface S14 facing the light exit side of the filter. The light from the object sequentially passes through the respective surfaces S1 to S14 and is finally imaged on the imaging surface S15.
In this example, the image height ImgH of the imaging lens is 4.81 mm. The total length TTL of the camera lens is 6.59 mm.
Table 13 shows a basic structural parameter table of the imaging lens of example seven, in which the units of the radius of curvature, thickness/distance, and focal length are all millimeters (mm).
Watch 13
Table 14 shows the high-order term coefficients that can be used for each of the aspherical mirror surfaces in example seven, wherein each of the aspherical mirror surface types can be defined by formula (1) given in example one above.
| Flour mark | A4 | A6 | A8 | A10 | A12 | A14 | A16 |
| S1 | 2.43E-03 | -5.97E-03 | 9.28E-03 | -6.86E-03 | 2.85E-03 | -5.99E-04 | 4.77E-05 |
| S2 | -4.82E-03 | 1.48E-02 | -2.25E-02 | 2.01E-02 | -1.01E-02 | 2.70E-03 | -3.03E-04 |
| S3 | -1.06E-02 | -1.83E-02 | 6.17E-02 | -6.21E-02 | 3.05E-02 | -7.66E-03 | 7.74E-04 |
| S4 | 7.02E-02 | -2.40E-01 | 3.77E-01 | -3.03E-01 | 1.34E-01 | -3.11E-02 | 2.97E-03 |
| S5 | 1.53E-01 | -3.57E-01 | 4.69E-01 | -3.50E-01 | 1.48E-01 | -3.32E-02 | 3.06E-03 |
| S6 | 5.50E-02 | -8.22E-02 | 6.96E-02 | -3.65E-02 | 1.09E-02 | -1.54E-03 | 5.69E-05 |
| S7 | -7.49E-02 | 3.04E-02 | -3.52E-02 | 3.32E-02 | -1.80E-02 | 5.08E-03 | -5.71E-04 |
| S8 | -8.61E-02 | 6.08E-02 | -6.03E-02 | 4.11E-02 | -1.67E-02 | 3.69E-03 | -3.33E-04 |
| S9 | 1.59E-03 | -6.90E-04 | -2.75E-04 | 2.48E-04 | -8.63E-05 | 1.19E-05 | -5.61E-07 |
| S10 | 1.82E-02 | -3.98E-03 | 1.04E-03 | -3.12E-05 | -3.50E-05 | 5.19E-06 | -2.15E-07 |
| S11 | -6.88E-03 | -6.69E-03 | 2.61E-03 | -2.36E-04 | -2.41E-05 | 5.19E-06 | -2.33E-07 |
| S12 | -2.11E-02 | 1.57E-03 | 6.36E-05 | -2.10E-05 | 1.19E-06 | -1.14E-08 | -4.58E-10 |
TABLE 14
Fig. 32 shows an on-axis chromatic aberration curve of the imaging lens of example seven, which indicates that light rays of different wavelengths are out of focus after passing through the imaging lens. Fig. 33 shows astigmatism curves representing meridional field curvature and sagittal field curvature of the imaging lens of example seven. Fig. 34 shows distortion curves of the imaging lens of example seven, which indicate distortion magnitude values corresponding to different angles of view. Fig. 35 shows a chromatic aberration of magnification curve of the imaging lens of example seven, which represents a deviation of different image heights on the imaging surface after light passes through the imaging lens.
As can be seen from fig. 32 to 35, the imaging lens according to example seven can achieve good imaging quality.
Example eight
As shown in fig. 36 to 40, an imaging lens of example eight of the present application is described. Fig. 36 shows a schematic configuration diagram of an imaging lens of example eight.
As shown in fig. 36, the image capturing lens sequentially includes from the light incident side to the light emergent side: a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter E7, and an image forming surface S15.
The first lens element E1 has positive refractive power, and a surface S1 of the first lens element facing the light-in side is convex, and a surface S2 of the first lens element facing the light-out side is concave. The second lens element E2 has negative refractive power, and has a convex surface S3 facing the light-incident side and a concave surface S4 facing the light-exit side. The third lens element E3 has positive refractive power, and has a convex surface S5 facing the light-incident side and a concave surface S6 facing the light-exit side. The fourth lens element E4 has positive refractive power, and a surface S7 of the fourth lens element facing the light-in side is convex, and a surface S8 of the fourth lens element facing the light-out side is convex. The fifth lens element E5 has positive refractive power, and its surface facing the light-incident side S9 is concave, and its surface facing the light-exit side S10 is convex. The sixth lens element E6 has negative refractive power, and its surface facing the light-entering side S11 is concave, and its surface facing the light-exiting side S12 is convex. The filter E7 has a surface S13 facing the light entrance side of the filter and a surface S14 facing the light exit side of the filter. The light from the object sequentially passes through the respective surfaces S1 to S14 and is finally imaged on the imaging surface S15.
In this example, the image height ImgH of the imaging lens is 4.85 mm. The total length TTL of the camera lens is 6.67 mm.
Table 15 shows a basic structural parameter table of the imaging lens of example eight, in which the units of the radius of curvature, thickness/distance, and focal length are all millimeters (mm).
Watch 15
Table 16 shows the high-order term coefficients that can be used for each aspherical mirror surface in example eight, wherein each aspherical mirror surface type can be defined by formula (1) given in example one above.
TABLE 16
Fig. 37 shows an on-axis chromatic aberration curve of the imaging lens of example eight, which indicates that light rays of different wavelengths are out of focus after passing through the imaging lens. Fig. 38 shows astigmatism curves representing meridional field curvature and sagittal field curvature of the imaging lens of example eight. Fig. 39 shows distortion curves of the imaging lens of example eight, which show distortion magnitude values corresponding to different angles of view. Fig. 40 shows a chromatic aberration of magnification curve of the imaging lens of example eight, which represents a deviation of different image heights on the imaging surface after light passes through the imaging lens.
As can be seen from fig. 37 to 40, the imaging lens according to example eight can achieve good imaging quality.
To sum up, examples one to eight satisfy the relationships shown in table 17, respectively.
Table 17 table 18 gives effective focal lengths f1 to f6 of the respective lenses of the imaging lenses of example one to example eight.
| Parameter/example | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
| TTL(mm) | 6.65 | 6.65 | 6.65 | 6.65 | 6.65 | 6.60 | 6.59 | 6.67 |
| Semi-FOV(°) | 43.00 | 42.99 | 42.99 | 43.00 | 43.00 | 42.99 | 43.24 | 43.00 |
| ImgH(mm) | 4.81 | 4.88 | 4.80 | 4.92 | 4.84 | 4.85 | 4.81 | 4.85 |
| f(mm) | 5.36 | 5.39 | 5.36 | 5.39 | 5.34 | 5.35 | 5.32 | 5.35 |
| f1(mm) | 6.82 | 7.95 | 6.33 | 10.32 | 9.63 | 7.89 | 6.76 | 9.66 |
| f2(mm) | -28.40 | -329.12 | -9.02 | 28.68 | -42.52 | -326.69 | -28.16 | -42.66 |
| f3(mm) | 25.47 | -44.66 | 39.35 | -63.88 | 33.63 | -44.33 | 25.26 | 33.74 |
| f4(mm) | 197.25 | 50.42 | 13.77 | -110.61 | 14.00 | 50.05 | 195.59 | 14.05 |
| f5(mm) | 5.34 | 4.68 | 6.28 | 4.55 | 5.89 | 4.64 | 5.30 | 5.91 |
| f6(mm) | -3.34 | -3.43 | -4.16 | -3.85 | -3.42 | -3.40 | -3.31 | -3.44 |
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 above-described image pickup lens.
It is obvious that the above described embodiments are only some of the embodiments of the present invention, and not all of them. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall belong to 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 accompanying drawings 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 (27)
1. An image pickup lens, comprising, in order from an incident side to an emergent side:
a first lens element with refractive power;
a second lens element with refractive power;
a third lens element with refractive power;
the fourth lens element with refractive power has a convex surface facing the light incident side;
the fifth lens element with refractive power has a convex surface facing the light exit side;
the sixth lens element with negative refractive power has a concave surface facing the light entrance side;
wherein, the entrance pupil diameter EPD of the camera lens satisfies: 3mm < EPD <4 mm;
the effective focal length f5 of the fifth lens and half semi-Fov of the maximum field angle of the camera lens meet the following conditions: 4mm < f5 tan (semi-Fov) <6.5 mm;
the air gap T56 between the fifth lens and the sixth lens on the optical axis of the camera lens and the effective focal length f of the camera lens satisfy that: 3< f/T56< 5.
2. The imaging lens according to claim 1, wherein a distance TTL along an optical axis from a surface of the first lens facing a light entrance side to an imaging surface of the imaging lens, a sum Σ CT of center thicknesses of all lenses of the first lens to the sixth lens, and a half ImgH of a diagonal length of an effective pixel area on the imaging surface satisfy: 0.5< (TTL-Sigma CT)/ImgH < 1.5.
3. The imaging lens of claim 1, wherein an effective focal length f5 of the fifth lens and an effective focal length f of the imaging lens satisfy: 0.4< f5/f < 1.5.
4. The imaging lens of claim 1, wherein a distance TTL along an optical axis from a surface of the first lens facing a light incident side to an imaging surface of the imaging lens, an effective focal length f of the imaging lens, and an effective focal length f6 of the sixth lens satisfy: 3.0< TTL/(f + f6) < 6.0.
5. The imaging lens according to claim 1, wherein a composite focal length f123 of the first lens, the second lens, and the third lens and a composite focal length f2345 of the second lens, the third lens, the fourth lens, and the fifth lens satisfy: 1.0< f123/f2345< 2.5.
6. The imaging lens according to claim 1, characterized in that an air gap T45 of the fourth lens and the fifth lens on an optical axis of the imaging lens, an air gap T56 of the fifth lens and the sixth lens on the optical axis, and a center thickness CT5 of the fifth lens satisfy: 1.5< (T45+ T56)/CT5< 3.5.
7. The imaging lens of claim 1, wherein a radius of curvature R10 of a surface of the fifth lens facing the light exit side and a radius of curvature R11 of a surface of the sixth lens facing the light entrance side satisfy: -0.5< (R10-R11)/(R10+ R11) < 0.5.
8. The imaging lens according to claim 1, wherein a center thickness CT1 of the first lens, an air gap T12 of the first lens and the second lens on the optical axis, a center thickness CT2 of the second lens, an air gap T23 of the second lens and the third lens on the optical axis, a center thickness CT3 of the third lens satisfy: 6.0< (CT1+ T12+ CT2+ T23+ CT3)/CT2< 8.5.
9. The imaging lens according to claim 1, wherein an edge thickness ET6 at the maximum effective radius of the sixth lens and a curvature radius R11 of a surface of the sixth lens facing the light incident side satisfy: -0.8< ET6/R11< 0.
10. The imaging lens according to claim 1, wherein an on-axis distance SAG51 between an intersection point of the fifth lens light-entering-side surface and the optical axis and an effective radius vertex of the fifth lens light-entering-side surface, an on-axis distance SAG61 between an intersection point of the sixth lens light-entering-side surface and the optical axis and an effective radius vertex of the sixth lens light-entering-side surface, and an on-axis distance SAG21 between an intersection point of the second lens light-entering-side surface and the optical axis and an effective radius vertex of the second lens light-entering-side surface satisfy: -0.5< SAG51/(SAG61-SAG21) < 0.5.
11. The imaging lens according to claim 1, wherein an on-axis distance SAG61 between an intersection point of the light-entering-side surface of the sixth lens and the optical axis and an effective radius apex of the light-entering-side surface of the sixth lens and an on-axis distance SAG62 between an intersection point of the light-exiting-side surface of the sixth lens and the optical axis and an effective radius apex of the light-exiting-side surface of the sixth lens satisfy: 1.0< SAG61/SAG62< 2.5.
12. The imaging lens according to claim 1, wherein an edge thickness ET4 at the maximum effective radius of the fourth lens, a center thickness CT4 of the fourth lens, an edge thickness ET3 at the maximum effective radius of the third lens, and a center thickness CT3 of the third lens satisfy: -1.0< ET4/CT4-ET3/CT3< 1.0.
13. The imaging lens according to claim 1, wherein a center thickness CT3 of the third lens, an air gap T34 of the third lens and the fourth lens on the optical axis, a center thickness CT4 of the fourth lens, and a sum Σ AT of air gaps of any adjacent lenses of the first lens to the sixth lens on the optical axis satisfy 0< (CT3+ T34+ CT4)/∑ AT < 0.7.
14. The imaging lens according to claim 1, wherein a sum Σ CT of center thicknesses of all lenses of the first lens to the sixth lens and a distance TD on the optical axis between a surface of the first lens facing the light-entering side and a surface of the sixth lens facing the light-exiting side satisfy: 0.2< ∑ CT/TD < 1.0.
15. An image pickup lens, comprising, in order from an incident side to an emergent side:
a first lens element with refractive power;
a second lens element with refractive power;
a third lens element with refractive power;
the fourth lens element with refractive power has a convex surface facing the light incident side;
the fifth lens element with refractive power has a convex surface facing the light exit side;
the sixth lens element with negative refractive power has a concave surface facing the light incident side;
wherein, the entrance pupil diameter EPD of the camera lens satisfies: 3mm < EPD <4 mm;
the effective focal length f5 of the fifth lens and half semi-Fov of the maximum field angle of the camera lens meet the following conditions: 4mm < f5 tan (semi-Fov) <6.5 mm;
the air gap T45 of the fourth lens and the fifth lens on the optical axis of the camera lens, the air gap T56 of the fifth lens and the sixth lens on the optical axis and the center thickness CT5 of the fifth lens satisfy: 1.5< (T45+ T56)/CT5< 3.5.
16. The imaging lens unit according to claim 15, wherein a distance TTL along an optical axis from a surface of the first lens element facing a light entrance side to an imaging surface of the imaging lens unit, a sum Σ CT of center thicknesses of all lenses of the first lens element to the sixth lens element, and a half ImgH of a diagonal length of an effective pixel area on the imaging surface satisfy: 0.5< (TTL-sigma CT)/ImgH < 1.5.
17. An imaging lens according to claim 15, wherein an effective focal length f5 of the fifth lens and an effective focal length f of the imaging lens satisfy: 0.4< f5/f < 1.5.
18. An image pickup lens according to claim 15, wherein a distance TTL along an optical axis from a surface of the first lens element facing a light entrance side to an image plane of the image pickup lens, an effective focal length f of the image pickup lens, and an effective focal length f6 of the sixth lens element satisfy: 3.0< TTL/(f + f6) < 6.0.
19. The imaging lens according to claim 15, wherein a combined focal length f123 of the first lens, the second lens, and the third lens and a combined focal length f2345 of the second lens, the third lens, the fourth lens, and the fifth lens satisfy: 1.0< f123/f2345< 2.5.
20. The imaging lens of claim 15, wherein a radius of curvature R10 of a surface of the fifth lens facing the light exit side and a radius of curvature R11 of a surface of the sixth lens facing the light entrance side satisfy: -0.5< (R10-R11)/(R10+ R11) < 0.5.
21. The imaging lens according to claim 15, wherein a center thickness CT1 of the first lens, an air gap T12 of the first lens and the second lens on the optical axis, a center thickness CT2 of the second lens, an air gap T23 of the second lens and the third lens on the optical axis, a center thickness CT3 of the third lens satisfy: 6.0< (CT1+ T12+ CT2+ T23+ CT3)/CT2< 8.5.
22. The imaging lens of claim 15, wherein the edge thickness ET6 at the maximum effective radius of the sixth lens and the curvature radius R11 of the surface of the sixth lens facing the light incident side satisfy: -0.8< ET6/R11< 0.
23. The image pickup lens as set forth in claim 15, wherein an axial distance SAG51 between an intersection of the fifth lens light entrance side surface and the optical axis and an effective radius apex of the fifth lens light entrance side surface, an axial distance SAG61 between an intersection of the sixth lens light entrance side surface and the optical axis and an effective radius apex of the sixth lens light entrance side surface, and an axial distance SAG21 between an intersection of the second lens light entrance side surface and the optical axis and an effective radius apex of the second lens light entrance side surface satisfy: -0.5< SAG51/(SAG61-SAG21) < 0.5.
24. The imaging lens according to claim 15, wherein an on-axis distance SAG61 between an intersection point of the light-entering-side surface of the sixth lens and the optical axis and an effective radius vertex of the light-entering-side surface of the sixth lens and an on-axis distance SAG62 between an intersection point of the light-exiting-side surface of the sixth lens and the optical axis and an effective radius vertex of the light-exiting-side surface of the sixth lens satisfy: 1.0< SAG61/SAG62< 2.5.
25. The imaging lens of claim 15, wherein an edge thickness ET4 at the maximum effective radius of the fourth lens, a center thickness CT4 of the fourth lens, an edge thickness ET3 at the maximum effective radius of the third lens, and a center thickness CT3 of the third lens satisfy: -1.0< ET4/CT4-ET3/CT3< 1.0.
26. The imaging lens according to claim 15, wherein a center thickness CT3 of the third lens, an air gap T34 of the third lens and the fourth lens on the optical axis, a center thickness CT4 of the fourth lens, and a sum Σ AT of air gaps of any adjacent lenses of the first lens to the sixth lens on the optical axis satisfy 0< (CT3+ T34+ CT4)/∑ AT < 0.7.
27. The imaging lens according to claim 15, wherein a sum Σ CT of center thicknesses of all lenses of the first lens to the sixth lens and a distance TD on the optical axis between a surface of the first lens facing the light-entering side and a surface of the sixth lens facing the light-exiting side satisfy: 0.2< ∑ CT/TD < 1.0.
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