Imaging lens, imaging device, and information terminal

Abstract

The application provides a camera lens, a camera device and an information terminal. The camera lens is sequentially arranged from an object side to an image side with: a first lens with negative refractive power, the first lens being an aspherical lens; a second lens with negative refractive power, the second lens being an aspherical lens; a third lens and a fourth lens with refractive power; a fifth lens with positive refractive power; a sixth lens with positive refractive power; a seventh lens with negative refractive power, the sixth lens and the seventh lens being cemented lenses; an aperture stop; an eighth lens with positive refractive power; and a ninth lens with negative refractive power, the object side surface of the ninth lens being concave at a near optical axis. The camera lens provided by the embodiment of the application has wide-angle characteristics, a short total length and a small lens aperture, and can effectively control distortion and match an image sensor with a large read-in angle.

Description

Technical Field

[0001] The invention relates to a camera lens, a camera device and an information terminal. Background Art

[0002] Wide-angle lenses, such as fisheye lenses, are used in a variety of applications. In recent years, shortening the total optical length and reducing the lens diameter of imaging lenses have become research topics. In particular, with the increasing thinness of portable information devices such as smartphones and the increasing pixel count of image sensors (imaging elements) incorporated into these devices, there is a growing demand for lower-profile imaging lenses in cameras incorporated into these devices. Furthermore, wide-angle lenses can produce significant distortion, leading to a desire for lenses with appropriately controlled aberrations.

[0003] For example, Patent Document 1 proposes an optical system substantially composed of seven lenses as an optical system that has a wide viewing angle and is compact while ensuring excellent optical performance.

[0004] Prior art literature:

[0005] Patent Literature:

[0006] Patent Document 1: Japanese Patent Application Laid-Open No. 2020-060722 Summary of the Invention

[0007] Problems to be solved by the invention

[0008] In recent years, to reduce the thickness of the entire camera system, models with image sensors having a larger light entry angle have emerged. As a result, there is also a demand for imaging lenses that support image sensors with a larger light entry angle.

[0009] However, the optical system described in Patent Document 1 cannot cope with an image sensor having a large reading angle.

[0010] Therefore, the object of the present invention is to realize a camera lens with wide-angle characteristics, which has a shorter total length and a smaller lens aperture, and the camera lens can effectively control distortion while also matching an image sensor with a larger reading angle.

[0011] Technical means to solve the problem

[0012] The camera lens of the present invention has nine refractive power lenses, which include, from the object side to the image side, the following: a first lens with negative refractive power, which is an aspheric lens; a second lens with negative refractive power, which is an aspheric lens; a third lens and a fourth lens with refractive power; a fifth lens with positive refractive power; a sixth lens with positive refractive power; a seventh lens with negative refractive power, which is a cemented lens; an aperture stop; an eighth lens with positive refractive power; and a ninth lens with negative refractive power, wherein at least one of the eighth lens and the ninth lens is an aspheric lens, and the object side surface of the ninth lens is concave near the optical axis.

[0013] Furthermore, an “aspherical lens” means that at least one of the object-side surface and the image-side surface of the lens is an aspherical surface.

[0014] According to the camera lens structure described above, distortion can be properly and effectively controlled through the first and second lenses, enabling equidistant projection and stereoscopic projection, thus achieving wide-angle imaging. Furthermore, the aspheric lenses (i.e., the eighth and ninth lenses) located closer to the image side than the aperture stop properly control the light incident on the image sensor, thereby enabling the camera lens to capture light at a wide angle, facilitating matching with the image sensor, which has a wide light entry angle. Furthermore, through the interaction between the two aspheric lenses (i.e., the first and second lenses) located closest to the object side, the cemented lens (i.e., the sixth and seventh lenses) located closer to the object side than the aperture stop, and the aspheric lenses (i.e., the eighth and ninth lenses) located closer to the image side than the aperture stop, the camera lens achieves miniaturization while maintaining high imaging quality.

[0015] That is, the above embodiment realizes a camera lens with wide-angle characteristics, which has a short total length and a small lens aperture. The camera lens can effectively control distortion while also matching an image sensor with a large reading angle.

[0016] In the above-mentioned imaging lens, it is preferable that the following conditional expression (1) is satisfied.

[0017] (1)0.40<|(CRH) / (Ymax)|<0.90,

[0018] Among them, Ymax is the image height corresponding to half of the maximum field of view angle; with the aperture stop as the symmetry axis, on the surface symmetrical to the imaging plane, the chief ray height corresponding to the maximum image height on the imaging plane is CRH.

[0019] According to conditional expression (1), the aperture stop is clamped in the middle, and on the imaging planes that are equidistant from each other and on the planes symmetrical to the imaging planes, the ratio of the chief ray heights corresponding to the maximum image heights on the two planes is reasonably optimized. That is, with the aperture stop as the symmetry plane, there is a plane symmetrical to the imaging plane, and the chief ray corresponding to the maximum image height has an intersection point through the plane. The vertical distance from the intersection point to the optical axis is the chief ray height (CRH). The ratio between this chief ray height and the maximum image height (Ymax) on the imaging plane is reasonably controlled to optimize the ratio between the two. This allows the camera lens to better control distortion while also matching an image sensor with a larger reading angle.

[0020] In addition, in the above-mentioned imaging lens, it is preferable that the following conditional expression (2) is satisfied.

[0021] (2)0.7<(fall) / (flF)<1.25,

[0022] Wherein, fall is the effective focal length of the camera lens; flF is the combined focal length of the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, and the seventh lens.

[0023] According to conditional expression (2), the ratio of the focal length of the entire system to the focal length of the lens group on the object side of the aperture stop is optimized. That is, the ratio of the focal length of the camera lens to the combined focal length of the first to seventh lenses is reasonably optimized. Seven of the nine lenses are closer to the object side than the aperture stop, that is, the aperture stop is closer to the image side. As a result, the camera lens maintains the appropriate angle of incidence of light relative to the image sensor while also appropriately and effectively correcting various aberrations.

[0024] In addition, in the above-mentioned imaging lens, it is preferable that the following conditional expression (3) is satisfied.

[0025] (3)2.0<(fLP1) / (fall)<3.9,

[0026] Among them, fLP1 is the effective focal length of the fifth lens; fall is the effective focal length of the camera lens.

[0027] According to conditional expression (3), the ratio between the focal length of the entire system and the focal length of the fifth lens is appropriately optimized. As a result, the imaging lens can effectively correct spherical aberration and field curvature.

[0028] In addition, in the above-mentioned imaging lens, it is preferable that the following conditional expression (4) is satisfied.

[0029] (4)1.3<(Rlast) / (fall)<5.0,

[0030] Wherein, Rlast is the curvature radius of the image side surface of the ninth lens at the optical axis; fall is the effective focal length of the camera lens.

[0031] According to conditional expression (4), the ratio of the focal length of the entire system and the paraxial curvature radius of the lens surface located closest to the image side (i.e., the image side surface of the ninth lens) is optimized. As a result, the incident angle of the main light of each field of view relative to the image sensor can be appropriately and effectively corrected.

[0032] In addition, in the above-mentioned imaging lens, it is preferable that the following conditional expression (5) is satisfied.

[0033] (5)1.6<|(fL1) / (fall)|<4.2,

[0034] Among them, fL1 is the effective focal length of the first lens; fall is the effective focal length of the camera lens.

[0035] According to conditional expression (5), the ratio between the focal length of the entire system and the focal length of the front first lens is optimized, and as a result, the imaging lens can maintain a wide angle of view and an appropriate amount of distortion.

[0036] In addition, in the above-mentioned imaging lens, it is preferable that the following conditional expression (6) is satisfied.

[0037] (6)1.5<(YmFOV) / (YmCRA)<3.0,

[0038] Among them, YmFOV is half of the maximum field of view angle; YmCRA is the chief ray incident angle of the field of view corresponding to the maximum image height.

[0039] According to conditional expression (6), the ratio of the principal ray incident angle of the field of view corresponding to the maximum field angle and the maximum image height is optimized, and as a result, the imaging lens can be matched with an image sensor having a large reading angle.

[0040] In addition, in the above-mentioned imaging lens, it is preferable that the following conditional expression (7) is satisfied.

[0041] (7)0.75<|(fLBS1) / (fLBS2)|<1.35,

[0042] Wherein, fLBS1 is the effective focal length of the sixth lens; fLBS2 is the effective focal length of the seventh lens.

[0043] According to conditional expression (7), the ratio of the focal lengths of the object-side lens (i.e., the sixth lens) and the image-side lens (i.e., the seventh lens) of the cemented lens is optimized, resulting in that the imaging lens can effectively correct chromatic aberration of magnification.

[0044] In addition, in the above-mentioned imaging lens, it is preferable that the following conditional expression (8) is satisfied.

[0045] (8) 2.0<(vdBS1) / (vdBS2)

[0046] Wherein, vdBS1 is the Abbe number of the sixth lens; vdBS2 is the Abbe number of the seventh lens.

[0047] According to conditional expression (8), the ratio of the Abbe numbers of the object-side lens (i.e., the sixth lens) and the image-side lens (i.e., the seventh lens) of the cemented lens (i.e., the sixth lens and the seventh lens) is optimized, resulting in that the imaging lens can further effectively correct chromatic aberration of magnification.

[0048] Furthermore, it is also preferable that the intermediate lenses (i.e., the third and fourth lenses) in the above-mentioned imaging lens be composed of a spherical lens with negative refractive power and a spherical lens with positive refractive power, arranged in this order from the object side toward the image side. This configuration facilitates the realization of an imaging lens that simultaneously satisfies multiple of the aforementioned conditional expressions.

[0049] An imaging device that solves the above-mentioned problems comprises: any of the above-mentioned imaging lenses; and an imaging element that converts an optical image formed by the imaging lens into an electrical signal. This imaging device achieves a shortened overall length and a reduced lens diameter in the imaging lens, effectively controls distortion, and supports an imaging element with a wide reading angle, thereby achieving a thinner design.

[0050] An information terminal that solves the above-mentioned problem comprises: any of the above-mentioned imaging lenses; an imaging element that converts an optical image formed by the imaging lens into an electrical signal; and a processing element that processes the electrical signal obtained by the imaging element. This information terminal is thinner.

[0051] Effects of the Invention

[0052] According to the present invention, it is possible to shorten the total length and reduce the lens diameter in a wide-angle lens, and to cope with a larger reading angle while appropriately controlling distortion. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] Figure 1 3 is a schematic structural diagram of the imaging lens in the first embodiment.

[0054] Figure 2 Graphs showing longitudinal spherical aberration, astigmatism field curvature, and distortion curves in the first embodiment.

[0055] Figure 3 This is an F-theta distortion curve diagram in the first embodiment.

[0056] Figure 4 2 is a schematic structural diagram of an imaging lens in a second embodiment.

[0057] Figure 5 Graphs showing longitudinal spherical aberration, astigmatism field curvature, and distortion curves in the second embodiment are shown.

[0058] Figure 6 This is an F-theta distortion curve diagram in the second embodiment.

[0059] Figure 7 3 is a schematic structural diagram of an imaging lens in a third embodiment.

[0060] Figure 8 Graphs showing longitudinal spherical aberration, astigmatism field curvature, and distortion curves in the third embodiment.

[0061] Figure 9 This is an F-theta distortion curve diagram in the third embodiment.

[0062] Figure 10 3 is a schematic structural diagram of an imaging lens in a fourth embodiment.

[0063] Figure 11 Graphs showing longitudinal spherical aberration, astigmatism field curvature, and distortion curves in the fourth embodiment.

[0064] Figure 12 This is an F-theta distortion curve diagram in the fourth embodiment.

[0065] Figure 13 3 is a schematic structural diagram of an imaging lens in a fifth embodiment.

[0066] Figure 14 Graphs showing longitudinal spherical aberration, astigmatism field curvature, and distortion curves in the fifth embodiment.

[0067] Figure 15 is an F-theta distortion curve diagram in the fifth embodiment.

[0068] Figure 16 This is a block diagram showing the structure of a smartphone corresponding to one embodiment of the information terminal of the present invention.

[0069] Description of Reference Numerals

[0070] 1, 2, 3, 4, 5, 205: camera lens;

[0071] 11, 21, 31, 41, 51: first lens (front first lens);

[0072] 12, 22, 32, 42, 52: second lens (front second lens);

[0073] 13, 23, 33, 43, 53: third lens (intermediate lens);

[0074] 14, 24, 34, 44, 54: fourth lens (middle lens);

[0075] 15, 25, 35, 45, 55: fifth lens (third lens in front);

[0076] 16, 26, 36, 46, 56: sixth lens (positive lens of cemented lens);

[0077] 17, 27, 37, 47, 57: seventh lens (negative lens of cemented lens);

[0078] 18, 28, 38, 48, 58: eighth lens element (the first lens element behind);

[0079] 19, 29, 39, 49, 59: ninth lens element (second lens element at the rear);

[0080] JL1, JL2, JL3, JL4, JL5: cemented lenses;

[0081] A: aperture stop; IR: infrared filter;

[0082] P: Imaging surface. DETAILED DESCRIPTION

[0083] Hereinafter, embodiments of the present invention will be described.

[0084] The camera lens structure of the present invention comprises, arranged in order from the object side to the image side: a first front lens element having an aspherical surface and negative refractive power on the optical axis; a second front lens element having an aspherical surface and negative refractive power on the optical axis; a predetermined number of intermediate lenses, which may be zero; a third front lens element having positive refractive power on the optical axis; a cemented lens comprising an object-side lens having positive refractive power on the optical axis and an image-side lens having negative refractive power on the optical axis; an aperture stop; a first rear lens element having positive refractive power on the optical axis; and a second rear lens element having negative refractive power on the optical axis, with the object-side surface thereof being concave on the optical axis. Furthermore, at least one of the first rear lens element and the second rear lens element is an aspherical lens element.

[0085] The imaging lens of the present invention preferably satisfies the following conditional expression (1).

[0086] (1)0.40<|(CRH) / (Ymax)|<0.90,

[0087] Where, Ymax is the image height corresponding to half of the maximum field of view; CRH is the chief ray height corresponding to the maximum image height on the imaging plane on a plane symmetrical to the imaging plane with the aperture stop as the symmetry axis.

[0088] The camera lens that satisfies condition (1) can better control distortion and can also match an image sensor with a larger reading angle.

[0089] Furthermore, the imaging lens of the present invention preferably satisfies the following conditional expression (2).

[0090] (2)0.7<(fall) / (flF)<1.25,

[0091] Wherein, fall is the effective focal length of the camera lens; flF is the combined focal length of the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, and the seventh lens.

[0092] The imaging lens that satisfies conditional expression (2) maintains an appropriate angle of incidence of light with respect to the image sensor while also appropriately and effectively correcting various aberrations.

[0093] Furthermore, the imaging lens of the present invention preferably satisfies the following conditional expression (3).

[0094] (3)2.0<(fLP1) / (fall)<3.9,

[0095] Among them, fLP1 is the effective focal length of the fifth lens; fall is the effective focal length of the camera lens.

[0096] The camera lens that satisfies the conditional expression (3) can effectively correct spherical aberration and field curvature.

[0097] Furthermore, the imaging lens of the present invention preferably satisfies the following conditional expression (4).

[0098] (4)1.3<(Rlast) / (fall)<5.0,

[0099] Wherein, Rlast is the curvature radius of the image side surface of the ninth lens at the optical axis; fall is the effective focal length of the camera lens.

[0100] An imaging lens that satisfies conditional expression (4) can appropriately and effectively correct the incident angle of the principal ray of each field of view with respect to the image sensor.

[0101] Furthermore, the imaging lens of the present invention preferably satisfies the following conditional expression (5).

[0102] (5)1.6<|(fL1) / (fall)|<4.2,

[0103] Among them, fL1 is the effective focal length of the first lens; fall is the effective focal length of the camera lens.

[0104] An imaging lens that satisfies conditional expression (5) can maintain an appropriate angle of view and an appropriate amount of distortion.

[0105] Furthermore, the imaging lens of the present invention preferably satisfies the following conditional expression (6).

[0106] (6)1.5<(YmFOV) / (YmCRA)<3.0,

[0107] Among them, YmFOV is half of the maximum field of view angle; YmCRA is the chief ray incident angle of the field of view corresponding to the maximum image height.

[0108] A camera lens that satisfies conditional expression (6) can be matched with an image sensor having a larger reading angle.

[0109] Furthermore, the imaging lens of the present invention preferably satisfies the following conditional expression (7).

[0110] (7)0.75<|(fLBS1) / (fLBS2)|<1.35,

[0111] Wherein, fLBS1 is the effective focal length of the sixth lens; fLBS2 is the effective focal length of the seventh lens.

[0112] An imaging lens that satisfies conditional expression (7) can effectively correct lateral chromatic aberration.

[0113] Furthermore, the imaging lens of the present invention preferably satisfies the following conditional expression (8).

[0114] (8) 2.0<(vdBS1) / (vdBS2)

[0115] Wherein, vdBS1 is the Abbe number of the sixth lens; vdBS2 is the Abbe number of the seventh lens.

[0116] An imaging lens that satisfies conditional expression (8) can correct lateral chromatic aberration more effectively.

[0117] Furthermore, the imaging lens of the present invention is preferably configured such that the intermediate lenses (i.e., the third and fourth lenses) in the imaging lens include a spherical lens having negative refractive power and a spherical lens having positive refractive power, arranged in this order from the object side toward the image side. An imaging lens with such a configuration can easily simultaneously satisfy multiple of the aforementioned conditional expressions.

[0118] Hereinafter, specific embodiments of the imaging lens of the present invention will be described with reference to the accompanying drawings and tables.

[0119] In addition, the meanings of the symbols shown in the following tables and explanations are as follows.

[0120] "Sn" represents the surface number assigned to each lens surface or aperture surface of the imaging lens, sequentially from the object side to the image side. "R" represents the radius of curvature of each surface on the optical axis. "D" represents the distance between each surface and the next on the optical axis (the thickness at the center of the lens or the air gap). "nd" represents the refractive index of the lens or other device for the d-line (wavelength λ = 587.6 nm). "vd" represents the Abbe number of the lens or other device for the d-line. Furthermore, "fL" represents the focal length of each lens, and "vr" represents the effective diameter of each lens surface or aperture surface.

[0121] Regarding "curvature radius R", "INFINITY" indicates that the surface is flat. Regarding "optical element", "ImgH" indicates the size of the imaging surface.

[0122] In the imaging lenses used in various embodiments, some lens surfaces are formed as aspherical. With the center point of the lens surface (lens vertex) as the origin, the distance from a certain point to the origin in the direction parallel to the optical axis is set to "z," and the distance from the point to the origin in the direction perpendicular to the optical axis is set to "r." Furthermore, when the paraxial curvature of the lens vertex is set to "c," the conic constant is set to "k," and the 4th, 6th, ..., and 20th order aspheric coefficients are set to "A4," "A6," ..., and "A20," respectively, the aspheric shape is defined by the following formula 1.

[0123] [Formula 1]

[0124]

[0125] In the tables showing the following conic constants and aspheric coefficients, numerical values ​​are expressed using exponential notation with a base of 10. For example, "0.12E-05" means "0.12 × (10 to the power of -5)" and "9.87E+03" means "9.87 × (10 to the power of 3)".

[0126] <First embodiment>

[0127] Figure 1 1 is a schematic diagram showing the structure of an imaging lens 1 according to the first embodiment.

[0128] The imaging lens 1 of the first embodiment has the following configuration: arranged in order from the object side to the image side: a first lens 11 having negative refractive power, a second lens 12 having negative refractive power, a third lens 13 having negative refractive power, a fourth lens 14 having positive refractive power, a fifth lens 15 having positive refractive power, a sixth lens 16 having positive refractive power, a seventh lens 17 having negative refractive power, an eighth lens 18 having positive refractive power, and a ninth lens 19 having negative refractive power. The sixth lens 16 and the seventh lens 17 are cemented together to form a cemented lens JL1.

[0129] In the following description of each embodiment, the object side (left side in the drawing) surface of each lens may be referred to as the “front surface”, and the image side (right side in the drawing) surface of each lens may be referred to as the “rear surface”.

[0130] The first lens 11 is an example of the first lens at the front, and the second lens 12 is an example of the second lens at the front. The third lens 13 and the fourth lens 14 are examples of intermediate lenses, and the fifth lens 15 is an example of the third lens at the front. The eighth lens 18 is an example of the first lens at the rear, and the ninth lens 19 is an example of the second lens at the rear.

[0131] An aperture stop A with a fixed aperture is provided between the cemented lens JL1 and the eighth lens 18. An imaging plane P of an imaging element (image sensor) is provided on the imaging plane of the imaging lens 1. An infrared filter IR is provided between the ninth lens 19 and the imaging plane P.

[0132] Table 1 shows lens data for the imaging lens 1 according to the first embodiment.

[0133] [Table 1]

[0134] Optical components Sn R(mm) D(mm) nd vd fL(mm) vr(mm) lens1 1 -16.1342 0.6000 1.77400 49.60 -7.133 14.83 2 8.5294 3.4758 9.01 lens2 3 -8.5942 0.4000 1.85223 40.12 -13.868 8.36 4 -32.1722 1.1389 7.51 lens3 5 -13.1082 0.9839 1.71736 29.51 -17.094 7.54 6 196.0643 0.1000 8.09 lens4 7 14.6678 1.8818 2.00331 28.32 8.682 8.54 8 -20.0685 0.1000 8.53 lens5 9 5.4918 2.2149 1.75500 52.34 7.607 7.52 10 103.5844 0.6159 6.73 lens6 11 5.1945 1.4285 1.59349 67.33 4.941 4.27 lens7 12 -6.0428 0.4000 1.94596 17.94 -5.334 2.94 13 31.5779 0.2048 2.32 Aperture stop 14 INFINITY 0.6587 1.72 lens8 15 -56.8790 1.0553 1.62087 63.88 12.653 2.82 16 -6.9515 0.8793 3.70 lens9 17 23.2447 1.1632 1.77400 49.60 -10.246 4.84 18 5.7841 0.7000 6.31 IR 19 INFINITY 0.3000 1.51680 64.21 20 INFINITY 0.5000 IhD 21 INFINITY

[0135] In the imaging lens 1 , of the eighteen lens surfaces from the first lens 11 to the ninth lens 19 , two surfaces of the first lens 11 , two surfaces of the second lens 12 , two surfaces of the eighth lens 18 , and two surfaces of the ninth lens 19 (a total of eight surfaces) are formed aspherical surfaces.

[0136] Tables 2 and 3 show the aspheric coefficients and the conic constant k of the aspheric lens in the first embodiment.

[0137] [Table 2]

[0138] Sn K A4 A6 A8 A10 1 0.000000 3.6187410E-03 -2.1105940E-04 8.8574220E-06 -2.3020640E-07 2 0.000000 3.1643780E-03 -1.2422040E-04 1.7144300E-06 -5.5401530E-08 3 0.000000 -1.4299570E-03 -5.6355660E-05 9.1269740E-05 -1.3575800E-05 4 0.000000 4.9489070E-04 7.7292670E-07 7.9697140E-05 -1.1037180E-05 15 0.000000 -1.3597810E-02 4.5320860E-03 -1.0822550E-02 1.5406190E-02 16 0.000000 -1.7052050E-02 6.7576120E-03 -5.6411820E-03 4.5048060E-03 17 0.000000 -3.5800530E-02 8.1040080E-03 -3.5985040E-03 1.5606260E-03 18 0.000000 -3.3624030E-02 8.3781010E-03 -2.4414210E-03 5.4617140E-04

[0139] [Table 3]

[0140] Sn A12 A14 A16 A18 A20 1 3.5396370E-09 -2.7236600E-11 3.4479440E-14 5.4717880E-16 0.0000000E+00 2 -1.3832930E-08 4.2578620E-09 -2.6943720E-10 5.8125000E-12 0.0000000E+00 3 1.0452540E-06 -4.7766520E-08 1.2337970E-09 -1.3921740E-11 0.0000000E+00 4 7.2765880E-07 -2.3839340E-08 1.8697070E-10 6.6616250E-12 0.0000000E+00 15 -1.3311020E-02 7.0778710E-03 -2.0939150E-03 2.5921160E-04 0.0000000E+00 16 -2.3867800E-03 8.0607660E-04 -1.4859850E-04 1.1148160E-05 0.0000000E+00 17 -4.6668820E-04 8.8321750E-05 -9.2552040E-06 4.0208770E-07 0.0000000E+00 18 -8.4355190E-05 8.2147290E-06 -4.4834920E-07 1.0368270E-08 0.0000000E+00

[0141] Table 4 shows the effective focal length fall, F number, field of view, image height (Ymax) corresponding to half of the maximum field of view, total optical length (TTL) of the camera lens 1 in the first embodiment, the chief ray height CRH corresponding to the maximum image height on the imaging plane P on the plane symmetrical to the imaging plane P with the aperture stop A held therebetween, the combined focal length flF from the first lens 11 to the cemented lens JL1 (i.e., the first lens 11 to the seventh lens 17), the focal length fLP1 of the convex lens immediately in front of the cemented lens JL1 (i.e., the fifth lens 15), and the focal length of the camera lens 1. The radius of curvature Rlast of the lens surface closest to the image side (i.e., the image side surface of the ninth lens 19), half of the maximum field of view YmFOV, the principal ray incident angle YmCRA of the field of view corresponding to the maximum image height, the focal length fLBS1 of the positive lens of the cemented lens JL1 (i.e., the sixth lens 16), the focal length fLBS2 of the negative lens of the cemented lens JL1 (i.e., the seventh lens 17), the Abbe number vdBS1 of the positive lens of the cemented lens JL1 (i.e., the sixth lens 16), and the Abbe number vdBS2 of the negative lens of the cemented lens JL1 (i.e., the seventh lens 17).

[0142] [Table 4]

[0143] fLall(mm) 3.056 F-number 2.55 Full viewing angle (°) 150 Maximum image height Ymax (mm) 4.0 Optical full length TTL (mm) 18.801 CRH(mm) -3.03 fIF(mm) 3.502 fLP1(=fL5)(mm) 7.607 Rlast(=R18)(mm) 5.784 YmFOV(°) 75.0 YmCRA(°) 33.4 fLBS1(=fL11)(mm) 4.941 fLBS2(=fL12)(mm) -5.334 vdBS1(=vd11) 67.33 vdBS2(=vd12) 17.94

[0144] like Figure 1 As shown in Table 4, at the end of the imaging plane P, the incident angle of the chief ray of the field of view relative to the imaging plane P is relatively large. As shown in Table 4, the incident angle YmCRA of the chief ray of the field of view corresponding to the maximum image height is 33.4 degrees. Therefore, the imaging lens 1 of the first embodiment can be compatible with image sensors with relatively large light reading angles.

[0145] In addition, according to Table 4, in the first embodiment:

[0146] |(CRH) / (Ymax)|=0.76, (fall) / (flF)=0.87, (fLPl) / (fall)=2.49, (Rlast) / (fall)=1.89, |(fL1) / (fall)|=2.33, (YmFOV) / (YmCRA)=2.24, |(fLBS1) / (fLBS2)|=0.93, (vdBS1) / (vdBS2)=3.75, therefore, the above-mentioned conditional expressions (1)-(8) are satisfied.

[0147] Figure 2 and Figure 3 Graphs showing various aberrations in the first embodiment. Figure 2 The longitudinal spherical diagram, astigmatism field curvature diagram, and distortion curve diagram are shown in FIG. Figure 3The F-theta distortion graph is shown in . The vertical axis of the longitudinal spherical aberration graph represents the normalized field of view, and the vertical axes of the astigmatism field curvature graph, the distortion graph, and the F-theta distortion graph represent the image height (mm).

[0148] In the longitudinal spherical diagram, the values ​​for the c-line (λ = 656.3 nm) are indicated by a dashed line, the values ​​for the e-line (λ = 546.1 nm) are indicated by a solid line, and the values ​​for the f-line (λ = 486.1 nm) are indicated by a dashed line. The solid line representing the e-line values ​​nearly coincides with the vertical axis. In the astigmatic field curvature diagram, T represents the field curvature in the tangential direction of the imaging surface P, indicated by a dashed line, and S represents the field curvature in the sagittal direction of the imaging surface P, indicated by a solid line.

[0149] from Figure 2 and Figure 3 As can be seen from the various aberration diagrams shown, the first embodiment has various aberrations that are well corrected and has excellent imaging performance.

[0150] <Second embodiment>

[0151] Figure 4 2 is a schematic diagram showing the structure of an imaging lens 2 in a second embodiment.

[0152] The imaging lens 2 of the second embodiment has the following configuration: arranged in order from the object side to the image side: a first lens 21 having negative refractive power, a second lens 22 having negative refractive power, a third lens 23 having negative refractive power, a fourth lens 24 having positive refractive power, a fifth lens 25 having positive refractive power, a sixth lens 26 having positive refractive power, a seventh lens 27 having negative refractive power, an eighth lens 28 having positive refractive power, and a ninth lens 29 having negative refractive power. The sixth lens 26 and the seventh lens 27 are cemented together to form a cemented lens JL2.

[0153] The first lens 21 is an example of the first lens at the front, the second lens 22 is an example of the second lens at the front. The third lens 23 and the fourth lens 24 are examples of intermediate lenses, and the fifth lens 25 is an example of the third lens at the front. The eighth lens 28 is an example of the first lens at the rear, and the ninth lens 29 is an example of the second lens at the rear.

[0154] An aperture stop A with a fixed aperture is provided between the cemented lens JL2 and the eighth lens 28. An imaging surface P of an imaging element (image sensor) is disposed on the imaging surface P of the imaging lens 2. An infrared filter IR is disposed between the ninth lens 29 and the imaging surface P.

[0155] Table 5 shows lens data for the imaging lens 2 according to the second embodiment.

[0156] [Table 5]

[0157] Optical components Sn R(mm) D(mm) nd vd fL(mm) vr(mm) lens1 1 -18.1874 0.6000 1.69385 53.15 -8.139 14.81 2 8.3011 3.2358 9.35 lens2 3 -9.6514 0.4000 1.88385 37.20 -10.408 8.63 4 200.0000 1.4910 7.42 lens3 5 -12.0380 0.9540 1.80811 22.69 -14.023 7.44 6 200.0000 0.1000 7.99 lens4 7 17.2933 1.9147 2.00331 28.32 8.274 8.39 8 -15.0806 0.1000 8.44 lens5 9 5.1909 2.1242 1.83481 42.73 7.317 7.33 10 28.1304 0.8940 6.46 lens6 11 4.4126 1.3349 1.59349 67.33 4.460 3.74 lens7 12 -5.8692 0.4000 1.94596 17.94 -4.730 2.38 13 19.4480 0.0653 1.79 Aperture stop 14 INFINITY 0.7272 1.63 lens8 15 -200.0000 0.9160 1.62087 63.88 22.939 2.84 16 -13.3186 0.6011 3.66 lens9 17 9.4361 1.3443 1.66910 55.40 -26.282 4.92 18 5.7903 0.7000 6.42 IR 19 INFINITY 0.3000 1.51680 64.21 20 INFINITY 0.5000 IhD 21 INFINITY

[0158] In the imaging lens 2 , of the eighteen lens surfaces from the first lens 21 to the ninth lens 29 , two surfaces of the first lens 21 , two surfaces of the second lens 22 , two surfaces of the eighth lens 28 , and two surfaces of the ninth lens 29 (a total of eight surfaces) are formed aspherical surfaces.

[0159] Tables 6 and 7 show the aspherical coefficients and the conic constant k of the aspherical lens in the second embodiment.

[0160] [Table 6]

[0161] Sn K A4 A6 A8 A10 1 0.000000 3.4458550E-03 -2.2956580E-04 1.0989430E-05 -3.2976750E-07 2 0.000000 2.8169520E-03 -1.6227030E-04 8.4394750E-06 -1.5143340E-06 3 0.000000 -1.3845450E-03 1.4902800E-05 7.7362730E-05 -1.1779280E-05 4 0.000000 8.6106310E-04 3.2982650E-05 7.9568830E-05 -1.1148650E-05 15 0.000000 -1.3881270E-02 5.5917110E-03 -1.1420920E-02 1.5628400E-02 16 0.000000 -2.0216280E-02 8.7889370E-03 -5.2570540E-03 4.2379150E-03 17 0.000000 -3.1869830E-02 5.7886340E-03 -1.3991760E-03 5.2136900E-04 18 0.000000 -2.3027440E-02 3.0781150E-03 -5.2373910E-04 7.5598630E-05

[0162] [Table 7]

[0163] Sn A12 A14 A16 A18 A20 1 6.1615930E-09 -6.8487470E-11 3.9939640E-13 -8.6113300E-16 0.0000000E+00 2 1.8070530E-07 -9.7597680E-09 2.5092800E-10 -2.3807980E-12 0.0000000E+00 3 8.6337020E-07 -3.5830670E-08 8.1092770E-10 -7.8119950E-12 0.0000000E+00 4 7.2765880E-07 -2.3839340E-08 1.8697070E-10 6.6616250E-12 0.0000000E+00 15 -1.3311020E-02 7.0778710E-03 -2.0939150E-03 2.5921160E-04 0.0000000E+00 16 -2.5217310E-03 9.6461790E-04 -1.9677770E-04 1.6011130E-05 0.0000000E+00 17 -1.6213860E-04 3.2376540E-05 -3.4137920E-06 1.4022420E-07 0.0000000E+00 18 -6.5592470E-06 4.7271000E-08 3.6417880E-08 -1.8759710E-09 0.0000000E+00

[0164] Table 8 shows the effective focal length fall, F number, field of view, image height (Ymax) corresponding to half of the maximum field of view, total optical length (TTL) of the camera lens 2 in the second embodiment, the chief ray height CRH corresponding to the maximum image height on the imaging plane P on the surface between which the aperture stop A is held and which is symmetrical to the imaging plane P, the combined focal length flF from the first lens 21 to the cemented lens JL2 (i.e., the first lens 21 to the seventh lens 27), the focal length fLP1 of the convex lens (i.e., the fifth lens 25) directly in front of the cemented lens JL2, and the focal length of the camera lens 2. The radius of curvature Rlast of the lens surface closest to the image side (i.e., the image side surface of the ninth lens 27), half of the maximum field of view angle YmFOV, the principal ray incident angle YmCRA of the field of view corresponding to the maximum image height, the focal length fLBS1 of the positive lens of the cemented lens JL2 (i.e., the sixth lens 26), the focal length fLBS2 of the negative lens of the cemented lens JL2 (i.e., the seventh lens 27), the Abbe number vdBS1 of the positive lens of the cemented lens JL2 (i.e., the sixth lens 26), and the Abbe number vdBS2 of the negative lens of the cemented lens JL2 (i.e., the seventh lens 27).

[0165] [Table 8]

[0166] fLall(mm) 2.910 F-number 2.55 Full viewing angle (°) 150 Maximum image height Ymax (mm) 4.0 Optical full length TTL (mm) 18.703 CRH(mm) -2.93 flF(mm) 3.346 fLP1(=fL5)(mm) 7.317 Rlast(=R18)(mm) 5.790 YmFOV(°) 75.0 YmCRA(°) 33.7 fLBS1(=fL11)(mm) 4.460 fLBS2(=fL12)(mm) -4.730 vdBS1(=vd11) 67.33 vdBS2(=vd12) 17.94

[0167] like Figure 4 As shown in Table 8, at the ends of the imaging plane P, the incident angle of the chief ray of the field of view relative to the imaging plane P is relatively large. As shown in Table 8, the incident angle YmCRA of the chief ray of the field of view corresponding to the maximum image height is 33.7 degrees. Therefore, the imaging lens 2 of the second embodiment can be compatible with image sensors with relatively large light reading angles.

[0168] In addition, according to Table 8, in the second embodiment:

[0169] |(CRH) / (Ymax)|=0.73, (fall) / (flF)=0.87, (fLP1) / (fall)=2.51, (Rlast) / (fall)=1.99, |(fL1) / (fall)|=2.80, (YmFOV) / (YmCRA)=2.22, |(fLBS1) / (fLBS2)|=0.94, (vdBS1) / (vdBS2)=3.75, therefore, the above-mentioned conditional expressions (1)-(8) are satisfied.

[0170] Figure 5 and Figure 6 Graphs showing various aberrations in the second embodiment. Figure 5 It shows the longitudinal spherical diagram, astigmatism field curvature diagram, and distortion curve diagram. Figure 6 The F-theta distortion graph is shown in . The vertical axis of the longitudinal spherical aberration graph represents the normalized field of view, and the vertical axes of the astigmatism field curvature graph, the distortion graph, and the F-theta distortion graph represent the image height (mm).

[0171] In the longitudinal spherical diagram, the values ​​along the c-line (λ = 656.3 nm) are indicated by a dashed line, the values ​​along the e-line (λ = 546.1 nm) by a solid line, and the values ​​along the f-line (λ = 486.1 nm) by a dashed line. The solid line representing the e-line values ​​nearly coincides with the vertical axis. In the astigmatism field curvature diagram, T represents the field curvature in the tangential direction of the imaging surface P, indicated by a dashed line, and S represents the field curvature in the sagittal direction of the imaging surface P, indicated by a solid line.

[0172] from Figure 5 and Figure 6 As can be seen from the various aberration diagrams shown, the second embodiment has various aberrations corrected well and has excellent imaging performance.

[0173] <Third embodiment>

[0174] Figure 7 3 is a schematic diagram showing the structure of the imaging lens 3 in the third embodiment.

[0175] The imaging lens 3 of the third embodiment has the following configuration: arranged in order from the object side to the image side: a first lens 31 having negative refractive power, a second lens 32 having negative refractive power, a third lens 33 having negative refractive power, a fourth lens 34 having positive refractive power, a fifth lens 35 having positive refractive power, a sixth lens 36 having positive refractive power, a seventh lens 37 having negative refractive power, an eighth lens 38 having positive refractive power, and a ninth lens 39 having negative refractive power. The sixth lens 36 and the seventh lens 37 are cemented together to form a cemented lens JL3.

[0176] The first lens 31 is an example of the first lens at the front, the second lens 32 is an example of the second lens at the front. The third lens 33 and the fourth lens 34 are examples of intermediate lenses, and the fifth lens 35 is an example of the third lens at the front. The eighth lens 38 is an example of the first lens at the rear, and the ninth lens 39 is an example of the second lens at the rear.

[0177] An aperture stop A with a fixed aperture is provided between the cemented lens JL3 and the eighth lens 38. An imaging surface P of an imaging element (image sensor) is disposed on the imaging surface P of the imaging lens 3. An infrared filter IR is disposed between the ninth lens 39 and the imaging surface P.

[0178] Table 9 shows lens data for the imaging lens 3 according to the third embodiment.

[0179] [Table 9]

[0180] Optical components Sn R(mm) D(mm) nd vd fL(mm) vr(mm) lens1 1 -50.9189 0.6000 1.80337 45.53 -7.755 14.97 2 7.1363 3.3902 10.12 lens2 3 -9.9928 0.4000 1.95150 29.83 -16.336 9.03 4 -28.5264 1.6829 7.50 lens3 5 -8.6568 0.9229 1.90366 31.42 -11.699 7.48 6 -50.2097 0.1000 8.14 lens4 7 18.8423 3.3976 2.00069 25.43 8.520 8.64 8 -14.1690 0.1000 8.77 lens5 9 5.6486 2.5493 1.75500 52.34 8.032 7.47 10 66.4189 0.6131 6.21 lens6 11 4.8955 1.3537 1.67790 55.56 4.363 3.92 lens7 12 -6.6359 0.4000 1.94596 17.94 -4.103 2.60 13 9.6249 0.0956 1.93 Aperture stop 14 INFINITY 0.8726 1.77 lens8 15 -149.7666 0.8986 1.62087 63.88 26.358 3.06 16 -14.7869 0.6525 3.81 lens9 17 5.4227 1.2317 1.49700 81.61 -80.139 5.60 18 4.4129 0.7000 6.72 IR 19 INFINITY 0.3000 1.51680 64.21 20 INFINITY 0.5000 IhD 21 INFINITY

[0181] In the imaging lens 3, among the eighteen lens surfaces from the first lens 31 to the ninth lens 39, two surfaces of the first lens 31, two surfaces of the second lens 32, two surfaces 8 of the eighth lens 3, and two surfaces of the ninth lens 39 (a total of eight surfaces) are formed aspherical surfaces.

[0182] Tables 10 and 11 show the aspherical coefficients and the conic constants k of the aspherical lenses in the third embodiment.

[0183] [Table 10]

[0184] Sn K A4 A6 A8 A10 1 0.000000 2.8064501E-03 -1.6843010E-04 6.8531197E-06 -1.8003622E-07 2 0.000000 2.3489557E-03 -7.4546641E-05 -6.2034163E-06 3.3055815E-07 3 0.000000 -1.5546886E-03 9.8931515E-05 5.7932676E-05 -8.3951299E-06 4 0.000000 3.5571931E-04 1.1575599E-04 6.2000291E-05 -7.4911252E-06 15 0.000000 -1.1769271E-02 3.8401174E-03 -4.0040769E-03 3.0812799E-03 16 0.000000 -1.7771799E-02 9.1772815E-03 -4.6910847E-03 2.5097663E-03 17 0.000000 -3.3819622E-02 8.3477939E-03 -2.2149123E-03 4.8469234E-04 18 0.000000 -2.5352054E-02 3.9262865E-03 -5.6686685E-04 2.3508523E-05

[0185] [Table 11]

[0186] Sn A12 A14 A16 A18 A20 1 3.1493936E-09 -3.5275435E-11 2.2513660E-13 -5.9316019E-16 0.0000000E+00 2 1.9028393E-09 -3.0880661E-10 4.6876972E-12 0.0000000E+00 0.0000000E+00 3 5.5033779E-07 -2.0246301E-08 4.0737929E-10 -3.5020980E-12 0.0000000E+00 4 3.5321141E-07 5.0763517E-09 -1.2595232E-09 3.7445685E-11 0.0000000E+00 15 -1.1704007E-03 2.2397566E-04 -1.7650845E-05 0.0000000E+00 0.0000000E+00 16 -9.6147511E-04 2.6776043E-04 -4.5198379E-05 3.2330449E-06 0.0000000E+00 17 -6.5313767E-05 4.8043705E-06 -1.5124225E-07 0.0000000E+00 0.0000000E+00 18 7.4343000E-06 -1.4385519E-06 1.0467868E-07 -2.8422732E-09 0.0000000E+00

[0187] Table 12 shows the effective distance fall, F number, field of view, image height (Ymax) corresponding to half of the maximum field of view, total optical length (TTL) of the camera lens 3 in the third embodiment, the chief ray height CRH corresponding to the maximum image height on the imaging plane P on the surface between which the aperture stop A is clamped and which is symmetrical to the imaging plane P, the combined focal length flF from the first lens 31 to the cemented lens JL3 (i.e., the first lens 31 to the seventh lens 37), the focal length fLP1 of the convex lens (i.e., the fifth lens 35) directly in front of the cemented lens JL3, and the focal length of the camera lens 3. The radius of curvature Rlast of the lens surface closest to the image side (i.e., the image side surface of the ninth lens 39), half of the maximum field of view angle YmFOV, the principal ray incident angle YmCRA of the field of view corresponding to the maximum image height, the focal length fLBS1 of the positive lens of the cemented lens JL3 (i.e., the sixth lens 36), the focal length fLBS2 of the negative lens of the cemented lens JL3 (i.e., the seventh lens 37), the Abbe number vdBS1 of the positive lens of the cemented lens JL3 (i.e., the sixth lens 36), and the Abbe number vdBS2 of the negative lens of the cemented lens JL3 (i.e., the seventh lens 37).

[0188] [Table 12]

[0189] fLall(mm) 2.770 F-number 2.40 Full viewing angle (°) 142 Maximum image height Ymax (mm) 4.0 Optical full length TTL (mm) 20.761 CRH(mm) -2.73 flF(mm) 3.332 fL_P1(=fL5)(mm) 8.032 Rlast(=R18)(mm) 4.413 YmFOV(°) 71.0 YmCRA(°) 32.8 fLBS1(=fL11)(mm) 4.363 fLBS2(=fL12)(mm) -4.103 vdBS1(=vd11) 55.56 vdBS2(=vd12) 17.94

[0190] like Figure 7 As shown in Table 12, at the ends of the imaging plane P, the incident angle of the chief ray of the field of view relative to the imaging plane P is relatively large. As shown in Table 12, the incident angle YmCRA of the chief ray of the field of view corresponding to the maximum image height is 32.8 degrees. Therefore, the imaging lens 3 of the third embodiment can be compatible with image sensors with relatively large light reading angles.

[0191] According to Table 12, since in the third embodiment, |(CRH) / (Ymax)|=0.68, (fall) / (flF)=0.83, (fLP1) / (fall)=2.90, (Rlast) / (fall)=1.59, |(fL1) / (fall)|=2.80, (YmFOV) / (YmCRA)=2.16, |(fLBS1) / (fLBS2)|=1.06, (vdBS1) / (vdBS2)=3.10, the above-mentioned conditional expressions (1)-(8) are satisfied.

[0192] Figure 8 and Figure 9 Graphs showing various aberrations in the third embodiment. Figure 8 The longitudinal spherical diagram, astigmatism field curvature diagram, and distortion curve diagram are shown in FIG. Figure 9The F-theta distortion graph is shown in . The vertical axis of the longitudinal spherical aberration graph represents the normalized field of view, and the vertical axes of the astigmatism field curvature graph, the distortion graph, and the F-theta distortion graph represent the image height (mm).

[0193] In the longitudinal spherical diagram, the values ​​along the c-line (λ = 656.3 nm) are indicated by a dashed line, the values ​​along the e-line (λ = 546.1 nm) by a solid line, and the values ​​along the f-line (λ = 486.1 nm) by a dashed line. The solid line representing the e-line values ​​nearly coincides with the vertical axis. In the astigmatism field curvature diagram, T represents the field curvature in the tangential direction of the imaging surface P, indicated by a dashed line, and S represents the field curvature in the sagittal direction of the imaging surface P, indicated by a solid line.

[0194] like Figure 8 and Figure 9 As can be seen from the various aberration diagrams shown, the third embodiment has various aberrations corrected well and has excellent imaging performance.

[0195] <Fourth embodiment>

[0196] Figure 10 1 is a schematic diagram showing the structure of an imaging lens 4 in a fourth embodiment.

[0197] The imaging lens 4 of the fourth embodiment has the following configuration: arranged in order from the object side to the image side: a first lens 41 having negative refractive power, a second lens 42 having negative refractive power, a third lens 43 having negative refractive power, a fourth lens 44 having positive refractive power, a fifth lens 45 having positive refractive power, a sixth lens 46 having positive refractive power, a seventh lens 47 having negative refractive power, an eighth lens 48 having positive refractive power, and a ninth lens 49 having positive refractive power. The sixth lens 46 and the seventh lens 47 are cemented together to form a cemented lens JL4.

[0198] The first lens 41 is an example of the first lens at the front, the second lens 42 is an example of the second lens at the front. The third lens 43 and the fourth lens 44 are examples of intermediate lenses, and the fifth lens 45 is an example of the third lens at the front. The eighth lens 48 is an example of the first lens at the rear, and the ninth lens 49 is an example of the second lens at the rear.

[0199] An aperture stop A with a fixed aperture is provided between the cemented lens JL4 and the eighth lens 48. An imaging surface P of an imaging element (image sensor) is disposed on the imaging surface P of the imaging lens 4. An infrared filter IR is disposed between the ninth lens 49 and the imaging surface P.

[0200] Table 13 shows lens data for the fourth embodiment.

[0201] [Table 13]

[0202] Optical components Sn R(mm) D(mm) nd vd fL(mm) vr(mm) lens1 1 82.0480 0.7500 1.80337 45.53 -7.863 15.03 2 5.8416 3.5171 9.67 lens2 3 -12.3663 0.6000 2.00170 20.70 -34.704 8.36 4 -19.6602 1.5310 6.95 lens3 5 -6.5323 0.8501 1.88300 40.87 -8.186 6.88 6 -71.9994 0.1000 7.56 lens4 7 16.3066 3.4566 2.00069 25.43 7.210 8.03 8 -11.5696 0.1000 8.13 lens5 9 6.3237 1.9659 1.75500 52.34 8.950 6.74 10 85.3985 0.6580 5.73 lens6 11 5.7491 1.2522 1.75500 52.34 4.082 3.73 lens7 12 -6.0221 0.4000 1.94596 17.94 -3.994 2.63 13 10.4652 0.0942 1.99 Aperture stop 14 INFINITY 1.0835 1.85 lens8 15 15.7695 0.8375 1.68894 31.08 33.580 3.56 16 48.4604 0.5756 4.11 lens9 17 5.1831 1.1880 1.49700 81.61 1876.521 5.59 18 4.8155 0.8140 6.70 IR 19 INFINITY 0.3000 1.51680 64.21 20 INFINITY 0.5000 IhD 21 INFINITY

[0203] In the imaging lens 4 , of the eighteen lens surfaces from the first lens 41 to the ninth lens 49 , two surfaces of the first lens 41 , two surfaces of the second lens 42 , two surfaces of the eighth lens 48 , and two surfaces of the ninth lens 49 (a total of eight surfaces) are formed aspherical surfaces.

[0204] Tables 14 and 15 show the aspherical coefficients and the conic constant k of the aspherical lens in the fourth embodiment.

[0205] [Table 14]

[0206] Sn K A4 A6 A8 A10 1 0.000000 3.0375384E-03 -1.5398228E-04 3.6903658E-06 -3.4610814E-09 2 0.000000 2.9477779E-03 -3.2442353E-06 -4.8579450E-06 -7.1537259E-07 3 0.000000 -3.3341078E-03 1.2704042E-03 -2.0545571E-04 2.1435004E-05 4 0.000000 -1.4188324E-03 1.1240452E-03 -1.6912133E-04 1.7093719E-05 15 0.000000 -6.0730538E-03 5.8601730E-03 -5.4315751E-03 3.4891187E-03 16 0.000000 -1.3728773E-02 1.0369323E.02 -4.3663699E.03 1.2567514E-03 17 0.000000 -3.3539988E-02 9.3527450E-03 -2.4818229E-03 5.1622514E-04 18 0.000000 -2.0241657E-02 2.4050418E-03 -1.4444861E-04 -4.1994662E-05

[0207] [Table 15]

[0208] Sn A12 A14 A16 A18 A20 1 -2.1360215E-09 5.6586617E-11 -6.5180855E-13 2.9920876E-15 0.0000000E+00 2 7.2974449E-08 -2.5659567E-09 3.5038405E-11 0.0000000E+00 0.0000000E+00 3 -1.3060424E-06 4.2418542E-08 -5.8071753E-10 2.5300346E-13 0.0000000E+00 4 -5.7246718E-07 -5.2073569E-08 6.8350328E-09 -2.3117554E-10 0.0000000E+00 15 -1.3047626E-03 2.5539606E-04 -2.0386843E-05 00000000E+00 0.0000000E+00 16 -1.1812364E-04 -3.1953345E-05 9.1399161E-06 -6.7001463E-07 0.0000000E+00 17 -6.8952928E-05 5.1848015E-06 -1.6833584E-07 0.0000000E+00 0.0000000E+00 18 1.3309183E-05 -1.7584755E-06 1.1488293E-07 -3.0014636E-09 0.0000000E+00

[0209] Table 16 shows the effective focal length fall, F number, field angle, image height (Ymax) corresponding to half the maximum field angle, total optical length (TTL), chief ray height CRH corresponding to the maximum image height on the imaging plane P on a plane symmetrical to the imaging plane P with the aperture stop A interposed therebetween, combined focal length flF from the first lens element 41 to the cemented lens JL4 (i.e., the first lens element 41 to the seventh lens element 47), focal length fLP1 of the convex lens element (i.e., the fifth lens element 45) immediately in front of the cemented lens JL4, and the image quality of the imaging lens 4 in the fourth embodiment. The curvature radius Rlast of the lens surface closest to the image side (i.e., the image side surface of the ninth lens 49), half of the maximum field of view angle YmFOV, the principal ray incident angle YmCRA of the field of view corresponding to the maximum image height, the focal length fLBS1 of the positive lens of the cemented lens JL4 (i.e., the sixth lens 46), the focal length fLBS2 of the negative lens of the cemented lens JL4 (i.e., the seventh lens 47), the Abbe number vdBS1 of the positive lens of the cemented lens JL4 (i.e., the sixth lens 46), and the Abbe number vdBS2 of the negative lens of the cemented lens JL4 (i.e., the seventh lens 47).

[0210] [Table 16]

[0211] fLall(mm) 2.770 F-number 2.40 Full viewing angle (°) 144.6 Maximum image height Ymax (mm) 4.0 Optical full length TTL (mm) 20.574 CRH(mm) -2.50 flF(mm) 3.403 fl_P1(=fl_5)(mm) 8.950 Rlast(=R18)(mm) 4.815 YmFOV(°) 72.3 YmCRA(°) 32.8 fLBS1(=fL11)(mm) 4.082 fLBS2(=fL12)(mm) -3.994 vdBS1(=vd11) 52.34 vdBS2(=vd12) 17.94

[0212] like Figure 10 As shown in Table 16, at the ends of the imaging plane P, the incident angle of the chief ray of the field of view relative to the imaging plane P is relatively large. As shown in Table 16, the chief ray incident angle YmCRA at the field angle corresponding to the maximum image height is 32.8 degrees. Therefore, the imaging lens 4 of the fourth embodiment can be compatible with image sensors with relatively large light reading angles.

[0213] In addition, according to Table 16, since in the fourth embodiment, |(CRH) / (Ymax)|=0.63, (fall) / (flF)=0.81, (fLP1) / (fall)=3.23, (Rlast) / (fall)=1.74, |(fL1) / (fall)|=2.84, (YmFOV) / (YmCRA)=2.20, |(fLBS1) / (fLBS2)|=1.02, (vdBS1) / (vdBS2)=2.92, the above-mentioned conditional expressions (1)-(8) are satisfied.

[0214] Figure 11 and Figure 12 Graphs showing various aberrations in the fourth embodiment. Figure 11 The longitudinal spherical diagram, astigmatism field curvature diagram, and distortion curve diagram are shown in FIG. Figure 12 The F-theta distortion graph is shown in . The vertical axis of the longitudinal spherical aberration graph represents the normalized field of view, and the vertical axes of the astigmatism field curvature graph, the distortion graph, and the F-theta distortion graph represent the image height (mm).

[0215] In the longitudinal spherical diagram, the values ​​along the c-line (λ = 656.3 nm) are indicated by a dashed line, the values ​​along the e-line (λ = 546.1 nm) by a solid line, and the values ​​along the f-line (λ = 486.1 nm) by a dashed line. The solid line representing the e-line values ​​nearly coincides with the vertical axis. In the astigmatism field curvature diagram, T represents the field curvature in the tangential direction of the imaging surface P, indicated by a dashed line, and S represents the field curvature in the sagittal direction of the imaging surface P, indicated by a solid line.

[0216] Depend on Figure 11 and Figure 12 As can be seen from the various aberration diagrams shown, the fourth embodiment has various aberrations corrected well and has excellent imaging performance.

[0217] <Fifth embodiment>

[0218] Figure 13 1 is a schematic diagram showing the structure of an imaging lens 5 according to a fifth embodiment.

[0219] The imaging lens 5 of the fifth embodiment has the following configuration: arranged in order from the object side to the image side: a first lens 51 having negative refractive power, a second lens 52 having negative refractive power, a third lens 53 having negative refractive power, a fourth lens 54 having positive refractive power, a fifth lens 55 having positive refractive power, a sixth lens 56 having positive refractive power, a seventh lens 57 having negative refractive power, an eighth lens 58 having positive refractive power, and a ninth lens 59 having negative refractive power. The sixth lens 56 and the seventh lens 57 are cemented together to form a cemented lens JL5.

[0220] The first lens 51 is an example of the first lens at the front, the second lens 52 is an example of the second lens at the front. The third lens 53 and the fourth lens 54 are examples of intermediate lenses, and the fifth lens 55 is an example of the third lens at the front. The eighth lens 58 is an example of the first lens at the rear, and the ninth lens 59 is an example of the second lens at the rear.

[0221] An aperture stop A with a fixed aperture is provided between the cemented lens JL5 and the eighth lens 58 . An imaging surface P of an imaging element (image sensor) is disposed on the imaging surface P of the imaging lens 5 . An infrared filter IR is disposed between the ninth lens 59 and the imaging surface P.

[0222] Table 17 shows lens data for the imaging lens 5 according to the fifth embodiment.

[0223] [Table 17]

[0224] Optical components Sn R(mm) D(mm) nd vd fL(mm) vr(mm) Iens1 1 -12.3094 0.7500 1.80337 45.53 -7.948 14.66 2 13.6268 3.2125 9.68 lens2 3 -11.1695 0.5500 1.85135 40.10 -7.925 9.25 4 17.4236 1.4309 8.19 lens3 5 -44.6681 1.7760 1.95375 32.32 -88.121 8.32 6 -97.1885 0.1000 9.01 lens4 7 15.0260 2.2153 1.88300 40.87 9.685 9.65 8 -18.4783 0.8734 9.64 lens5 9 5.4132 2.1989 1.78590 44.21 8.697 7.91 10 21.3719 1.3345 7.02 lens6 11 4.7838 1.3027 1.59280 68.34 5.010 3.83 lens7 12 -7.0380 0.5000 1.94596 17.94 -5.085 2.58 13 15.7194 0.0732 1.91 Aperture stop 14 INFINITY 0.6523 1.78 lens8 15 -92.3468 0.9829 1.62087 63.88 25.065 2.79 16 -13.3719 0.6032 3.60 lens9 17 21.5614 1.5758 1.85135 40.10 -27.296 4.63 18 10.8084 0.9500 6.08 IR 19 INFINITY 0.3000 1.51680 64.21 20 INFINITY 0.5000 IhD 21 INFINITY

[0225] In the imaging lens 5 , of the eighteen lens surfaces from the first lens 51 to the ninth lens 59 , two surfaces of the first lens 51 , two surfaces of the second lens 52 , two surfaces of the eighth lens 58 , and two surfaces of the ninth lens 59 (a total of eight surfaces) are formed aspherical surfaces.

[0226] Tables 18 and 19 show the aspherical coefficients and the conic constants k of the aspherical lenses in the fifth embodiment.

[0227] [Table 18]

[0228] Sn K A4 A6 A8 A10 1 0.000000 3.9510542E-03 -2.4342170E-04 1.3696380E-05 -5.9723544E-07 2 0.000000 3.3993468E-03 -1.3928424E-04 -7.1103326E-06 2.9428566E-06 3 0.000000 -1.3819729E-03 -1.2789984E-04 8.3972113E-05 -1.1826765E-05 4 0.000000 2.5585007E-04 -7.9415584E-05 8.0423930E-05 -1.3103930E-05 15 0.000000 -1.3984887E-02 8.1526127E-03 -2.0206651E-02 3.3007564E-02 16 0.000000 -2.1382854E-02 8.6248344E-03 -5.9323199E-03 3.9789138E-03 17 0.000000 -2.3963982E-02 5.8844498E-03 -2.6013271E-03 1.0836462E-03 18 0.000000 -1.7638577E-02 4.5298106E-03 -1.6755145E-03 5.2288052E-04

[0229] [Table 19]

[0230] Sn A12 A14 A16 A18 A20 1 1.8822416E-08 -4.0306017E-10 5.4968893E-12 -4.2959128E-14 1.4649529E-16 2 -3.9075113E-07 3.0913437E-08 -1.4910259E-09 4.0707581E-11 -4.7819860E-13 3 9.2345728E-07 -4.5308889E-08 1.3970432E-09 -2.4871079E-11 1.9504046E-13 4 1.2865313E-06 -9.0268378E-08 4.3474106E-09 -1.2453104E-10 1.5667551E-12 15 -3.4712379E-02 2.3721945E-02 -1.0105591E-02 2.4331958E-03 -2.5123944E-04 16 -1.8528437E-03 6.4338546E-04 -1.5804987E-04 2.4028006E-05 -1.6245791E-06 17 -3.2766843E-04 7.8732838E-05 -1.4096945E-05 1.5398399E-06 -7.2865746E-08 18 -1.1991239E-04 1.8812106E-05 -1.8712145E-06 1.0494894E-07 -2.5098554E-09

[0231] Table 20 shows the effective focal length fall, F number, field of view, image height (Ymax) generally corresponding to the maximum field of view angle, total optical length (TTL), chief ray height CRH of the maximum image height on the imaging plane P corresponding to the plane symmetrical to the imaging plane P with the aperture stop A held therebetween, combined focal length flF from the first lens 51 to the cemented lens JL5 (i.e., the first lens 51 to the seventh lens 57), focal length fLP1 of the convex lens (i.e., the fifth lens 55) directly in front of the cemented lens JL5, and the imaging lens 5 in the fifth embodiment. The radius of curvature Rlast of the lens surface closest to the image side in 5 (i.e., the image side surface of the ninth lens 59), half of the maximum field of view angle YmFOV, the principal ray incident angle YmCRA of the field of view corresponding to the maximum image height, the focal length fLBS1 of the positive lens of the cemented lens JL5 (i.e., the sixth lens 56), the focal length fLBS2 of the negative lens of the cemented lens JL5 (i.e., the seventh lens 57), the Abbe number vdBS1 of the positive lens of the cemented lens JL5 (i.e., the sixth lens 56), and the Abbe number vdBS2 of the negative lens of the cemented lens JL5 (i.e., the seventh lens 57).

[0232] [Table 20]

[0233] fLall(mm) 3.060 F-number 2.50 Full viewing angle (°) 152 Maximum image height Ymax (mm) 4.0 Optical full length TTL (mm) 21.882 CRH(mm) -3.23 flF(mm) 3.393 fLP1(=fL5)(mm) 8.697 Rlast(=R18)(mm) 10.808 Ym FOV(°) 76.0 YmCRA(°) 37.8 fLBS1(=fL11)(mm) 5.010 fLBS2(=fL12)(mm) -5.085 vdBS1(=vd11) 68.34 vdBS2(=vd12) 17.94

[0234] like Figure 13 As shown in Table 20, at the end of the imaging plane P, the incident angle of the chief ray of the field of view relative to the imaging plane P is relatively large. As shown in Table 20, the incident angle YmCRA of the chief ray of the field of view corresponding to the maximum image height is 37.8 degrees. Therefore, the imaging lens 5 of the fifth embodiment can be compatible with image sensors with relatively large light reading angles.

[0235] In addition, according to Table 20, in the fifth embodiment, |(CRH) / (Ymax)|=0.81, (fall) / (flF)=0.90, (fLP1) / (fall)=2.84, (Rlast) / (fall)=3.53, |(fL1) / (fall)|=2.60, (YmFOV) / (YmCRA)=2.01, |(fLBS1) / (fLBS2)|=0.99, (vdBS1) / (vdBS2)=3.81, and therefore, the above-mentioned conditional expressions (1)-(8) are satisfied.

[0236] Figure 14 and Figure 15 Graphs showing various aberrations in the fifth embodiment. Figure 14 The longitudinal spherical aberration diagram, astigmatism field curvature diagram, and distortion curve diagram are shown in FIG. Figure 15The F-theta distortion graph is shown in . The vertical axis of the longitudinal spherical aberration graph represents the normalized field of view, and the vertical axes of the astigmatism field curvature graph, the distortion graph, and the F-theta distortion graph represent the image height (mm).

[0237] In the longitudinal spherical diagram, the values ​​along the c-line (λ = 656.3 nm) are represented by a dashed line, the values ​​along the e-line (λ = 546.1 nm) by a solid line, and the values ​​along the f-line (λ = 486.1 nm) by a dashed line. The solid line representing the e-line values ​​almost coincides with the vertical axis. In the astigmatic field curvature diagram, T represents the field curvature of the imaging surface P in the tangential direction, represented by a dashed line, and S represents the field curvature of the imaging surface P in the sagittal direction, represented by a solid line.

[0238] Depend on Figure 14 and Figure 15 As can be seen from the various aberration diagrams shown, the fifth embodiment has various aberrations corrected well and has excellent imaging performance.

[0239] An imaging device according to the present invention includes the imaging lens according to the present invention and an imaging element that converts an optical image formed by the imaging lens into an electrical signal.

[0240] Specifically, the imaging lens of the imaging device of the present invention is configured to include, arranged in order from the object side toward the image side: a front first lens element having an aspherical surface and negative refractive power on the optical axis; a front second lens element having an aspherical surface and negative refractive power on the optical axis; a predetermined number of intermediate lenses, which may be zero; a front third lens element having positive refractive power on the optical axis; a cemented lens comprising an object-side lens having positive refractive power on the optical axis and an image-side lens having negative refractive power on the optical axis; an aperture stop A; a rear first lens element having positive refractive power on the optical axis; and a rear second lens element having negative refractive power on the optical axis, with its object-side lens surface being concave on the optical axis. Furthermore, at least one of the rear first lens element and the rear second lens element is an aspherical lens element.

[0241] The imaging lens in the imaging device of the present invention preferably satisfies the following conditional expression (1).

[0242] (1)0.40<|(CRH) / (Ymax)|<0.90,

[0243] Where, Ymax is the image height corresponding to half the maximum field of view angle; CRH is the chief ray height corresponding to the maximum image height on the imaging plane P, on a plane symmetrical to the imaging plane P with the aperture stop A as the symmetry axis. A camera lens that satisfies conditional equation (1) not only better controls distortion but also can be used with image sensors with a larger read angle.

[0244] Furthermore, the imaging lens in the imaging device of the present invention preferably satisfies the following conditional expression (2).

[0245] (2)0.7<(fall) / (flF)<1.25,

[0246] Wherein, fall is the effective focal length of the camera lens; flF is the combined focal length of the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, and the seventh lens.

[0247] The imaging lens that satisfies conditional expression (2) maintains an appropriate angle of incidence of light with respect to the image sensor while also appropriately and effectively correcting various aberrations.

[0248] Furthermore, the imaging lens in the imaging device of the present invention preferably satisfies the following conditional expression (3).

[0249] (3)2.0<(fLP1) / (fall)<3.9,

[0250] Among them, fLP1 is the effective focal length of the fifth lens; fall is the effective focal length of the camera lens.

[0251] The camera lens that satisfies the conditional expression (3) can effectively correct spherical aberration and field curvature.

[0252] Furthermore, the imaging lens in the imaging device of the present invention preferably satisfies the following conditional expression (4).

[0253] (4)1.3<(Rlast) / (fall)<5.0,

[0254] Wherein, Rlast is the curvature radius of the image side surface of the ninth lens at the optical axis; fall is the effective focal length of the camera lens.

[0255] An imaging lens that satisfies conditional expression (4) can appropriately and effectively correct the incident angle of the principal ray of each field of view with respect to the image sensor.

[0256] Furthermore, the imaging lens in the imaging device of the present invention preferably satisfies the following conditional expression (5).

[0257] (5)1.6<|(fL1) / (fall)|<4.2,

[0258] Among them, fL1 is the effective focal length of the first lens; fall is the effective focal length of the camera lens.

[0259] An imaging lens that satisfies conditional expression (5) can maintain an appropriate angle of view and an appropriate amount of distortion.

[0260] Furthermore, the imaging lens in the imaging device of the present invention preferably satisfies the following conditional expression (6).

[0261] (6)1.5<(YmFOV) / (YmCRA)<3.0,

[0262] Among them, YmFOV is half of the maximum field of view angle; YmCRA is the chief ray incident angle of the field of view corresponding to the maximum image height.

[0263] The camera lens that satisfies conditional expression (6) corresponds to an image sensor with a larger reading angle.

[0264] Furthermore, the imaging lens in the imaging device of the present invention preferably satisfies the following conditional expression (7).

[0265] (7)0.75<|(fLBS1) / (fLBS2)|<1.35,

[0266] Wherein, fLBS1 is the effective focal length of the sixth lens; fLBS2 is the effective focal length of the seventh lens.

[0267] An imaging lens that satisfies conditional expression (7) can effectively correct lateral chromatic aberration.

[0268] Furthermore, the imaging lens in the imaging device of the present invention preferably satisfies the following conditional expression (8).

[0269] (8) 2.0<(vdBS1) / (vdBS2)

[0270] Wherein, vdBS1 is the Abbe number of the sixth lens; vdBS2 is the Abbe number of the seventh lens.

[0271] An imaging lens that satisfies conditional expression (8) can correct lateral chromatic aberration more effectively.

[0272] Furthermore, the imaging lens in the imaging device of the present invention preferably has a structure in which the intermediate lenses (i.e., the third and fourth lenses) in the imaging lens are arranged in this order from the object side to the image side, comprising a spherical lens having negative refractive power and a spherical lens having positive refractive power. This configuration makes it easier for an imaging lens to simultaneously satisfy multiple of the aforementioned conditional expressions.

[0273] Figure 16 This is a block diagram showing the structure of a smartphone corresponding to one embodiment of the information terminal of the present invention.

[0274] Smartphone 200 includes: a display 201 with a touch panel that serves as a display unit and input unit; a CPU (central processing unit) 202 that performs information input and output, various information processing, and control processing via touch panel display 201; a communication unit 203 that performs telephone communications, Wi-Fi communications, and other functions under the control of CPU 202; a storage unit 204 that stores various information; an imaging lens 205 that employs any of the imaging lenses 1, ..., or 5 described in the above-described embodiments; an imaging element (image sensor) 206 that converts an optical image formed by imaging lens 205 into an electrical signal; and a power supply unit 207 that supplies power to the various components of smartphone 200. The combination of imaging lens 205 and imaging element (image sensor) 206 constitutes one embodiment of the imaging device of the present invention.

[0275] The electrical signal obtained by converting the optical image by the imaging element 206 is read as image data into the CPU 202, where various signal and image processing are performed. The CPU 202 is an example of a processing element as described herein. Furthermore, based on user instructions via the touch-panel display 201, the image data is displayed on the touch-panel display 201, stored in the storage unit 204, or transmitted via the communication unit 203.

[0276] Furthermore, in the above description, a smartphone is exemplified as one embodiment of the information terminal of the present invention. However, the information terminal of the present invention may be a mobile phone other than a smartphone, or a mobile terminal such as a tablet computer or a notebook computer.

[0277] Furthermore, in the above description, an imaging device incorporated in a smartphone is exemplified as one embodiment of the imaging device of the present invention. However, the imaging device of the present invention may also be a digital camera or the like.

Claims

1. A camera lens, characterized in that: There are nine lenses with refractive power, including the following from the object side to the image side: a first lens having negative refractive power, wherein the first lens is an aspherical lens; a second lens having negative refractive power, wherein the second lens is an aspherical lens; a third lens element having negative refractive power and a fourth lens element having positive refractive power; a fifth lens element having positive refractive power; a sixth lens element having positive refractive power; a seventh lens having negative refractive power, wherein the sixth lens and the seventh lens are a cemented lens; Aperture stop; an eighth lens element having positive refractive power; A ninth lens having negative refractive power, at least one of the eighth lens and the ninth lens being an aspherical lens, and the object side surface of the ninth lens being concave near the optical axis, wherein: Satisfy the conditional formula, 1.5<(YmFOV) / (YmCRA)<3.0, YmFOV is half of the maximum field of view; YmCRA is the chief ray incident angle of the field of view corresponding to the maximum image height.

2. The imaging lens according to claim 1, wherein: Satisfy the conditional expression, 0.40<|(CRH) / (Ymax)|<0.90, Wherein, Ymax is the image height corresponding to half of the maximum field of view angle; with the aperture stop as the axis of symmetry, on a surface symmetrical to the imaging plane, the chief ray height corresponding to the maximum image height on the imaging plane is CRH.

3. The camera lens according to claim 1, wherein: Satisfy the conditional expression, 0.7<(fall) / (flF)<1.25, Wherein, fall is the effective focal length of the camera lens; flF is the combined focal length of the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, and the seventh lens.

4. The imaging lens according to claim 1, wherein: Satisfy the conditional expression, 2.0<(fLP1) / (fall)<3.9, Among them, fLP1 is the effective focal length of the fifth lens; fall is the effective focal length of the camera lens.

5. The imaging lens according to claim 1, wherein: Satisfy the conditional expression, 1.3<(Rlast) / (fall)<5.0, Wherein, Rlast is the curvature radius of the image side surface of the ninth lens at the optical axis; fall is the effective focal length of the camera lens.

6. The camera lens according to claim 1, wherein: Satisfy the conditional expression, 1.6<|(fL1) / (fall)|<4.2, Among them, fL1 is the effective focal length of the first lens; fall is the effective focal length of the camera lens.

7. The imaging lens according to claim 1, wherein: The image side surface of the first lens is concave at the near optical axis; The object side surface of the second lens is concave at the near optical axis; The object side surface of the third lens is concave at the near optical axis; The object-side surface of the fourth lens is convex at the near optical axis, and the image-side surface is convex at the near optical axis; The object side surface of the fifth lens is convex at the near optical axis, and the image side surface is concave at the near optical axis; The object-side surface of the sixth lens is convex near the optical axis, and the image-side surface is convex near the optical axis; The object-side surface of the seventh lens element is concave near the optical axis, and the image-side surface is concave near the optical axis; The object side surface of the ninth lens is convex near the optical axis, and the image side surface is concave near the optical axis.

8. The imaging lens according to claim 1, wherein: Satisfy the conditional expression, 0.75<|(fLBS1) / (fLBS2)|<1.35, Wherein, fLBS1 is the effective focal length of the sixth lens; fLBS2 is the effective focal length of the seventh lens.

9. The imaging lens according to claim 1, wherein: Satisfy the conditional expression, 2.0<(vdBS1) / (vdBS2) Wherein, vdBS1 is the Abbe number of the sixth lens; vdBS2 is the Abbe number of the seventh lens.

10. The imaging lens according to claim 1, wherein: The third lens has negative refractive power and is a spherical lens; The fourth lens has positive refractive power and is a spherical lens.

11. A camera device, characterized in that: include: The camera lens according to any one of claims 1 to 10; and An imaging element converts an optical image formed by the imaging lens into an electrical signal.

12. An information terminal, characterized in that: include: The camera lens according to any one of claims 1 to 10; An imaging element, which converts an optical image formed by the imaging lens into an electrical signal; as well as The processing element processes the electrical signal obtained by the imaging element.

Images