Camera lens

Abstract

The present invention provides a camera lens, which can meet the requirements of low back and low F value and has good optical characteristics. The camera lens includes, from the object side to the image side, a first lens having a negative optical focal length; a second lens having a positive optical focal length; a third lens having a positive optical focal length; a fourth lens having a negative optical focal length; a fifth lens having a positive optical focal length; a sixth lens; and a seventh lens having a negative optical focal length; the convex surface of the fourth lens in the paraxial zone faces the image side, and the concave surface of the seventh lens in the paraxial zone faces the image side, satisfying a predetermined conditional formula.

Description

Technical Field

[0001] The present invention relates to an imaging lens for forming an image of a subject on a solid-state imaging element of a CCD sensor or a C-MOS sensor used in an imaging device. Background Art

[0002] In recent years, camera functions have been widely installed in various products such as home appliances, information terminals, and automobiles. It is expected that the development of products incorporating camera functions will continue in the future.

[0003] The imaging lens installed in such equipment needs to be compact and have high resolution performance.

[0004] As an imaging lens that aims at improving performance in the related art, for example, an imaging lens disclosed in Patent Document 1 below is known.

[0005] Patent document 1 (China Patent Gazette No. 110346903) discloses a camera lens, which includes, from the object side, in order: a first lens; a second lens; a third lens; a fourth lens; a fifth lens; a sixth lens; and a seventh lens; the relationship between the focal length of the first lens and the focal length of the entire camera lens system, the relationship between the refractive index of the second lens and the focal length of the third lens and the focal length of the fourth lens, the relationship between the paraxial curvature radius of the object side surface of the seventh lens and the paraxial curvature radius of the image side surface of the seventh lens, and the refractive index of the fourth lens satisfies certain conditions. Summary of the invention

[0006] Problem that the invention aims to solve

[0007] When attempting to achieve low profile and low F value by using the lens structure described in Patent Document 1, it is very difficult to correct aberrations in the peripheral portion, and good optical performance cannot be obtained.

[0008] The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide an imaging lens having a high resolution that satisfies the requirements for low profile and low F-number in a balanced manner and that satisfies various aberrations with good correction.

[0009] Furthermore, regarding the terms used in the present invention, the convex surface, concave surface, and plane surface of the lens surface refer to the shape near the optical axis (paraxial). The optical power refers to the optical power near the optical axis (paraxial). The pole refers to the point on the aspheric surface other than the optical axis where the tangent plane intersects the optical axis perpendicularly. The total optical length refers to the distance on the optical axis from the object side of the optical element located closest to the object side to the imaging surface. In addition, the total optical length and the back focal length are distances obtained by converting the thickness of the IR cutoff filter or protective glass disposed between the imaging lens and the imaging surface into air.

[0010] Means used to solve problems

[0011] The camera lens of the present invention comprises, from the object side toward the image side, a first lens having negative optical focal power; a second lens having positive optical focal power; a third lens having positive optical focal power; a fourth lens having negative optical focal power; a fifth lens having positive optical focal power; a sixth lens; and a seventh lens having negative optical focal power; the convex surface of the fourth lens in the paraxial zone faces the image side, and the concave surface of the seventh lens in the paraxial zone faces the image side.

[0012] Since the first lens has negative power and both surfaces thereof are aspherical, chromatic aberration, coma, astigmatism and distortion are suppressed.

[0013] Since the second lens has positive refractive power and both surfaces thereof are aspherical, low profile is achieved and coma, astigmatism, field curvature and distortion are corrected well.

[0014] Since the third lens has positive refractive power and both surfaces thereof are aspherical, low profile is achieved and spherical aberration, astigmatism, field curvature and distortion are corrected well.

[0015] The fourth lens has negative power and both surfaces are aspherical, with a convex surface facing the image side in the paraxial region, so that chromatic aberration, coma, astigmatism, field curvature and distortion are well corrected.

[0016] Since the fifth lens has positive refractive power and both surfaces thereof are aspherical, low profile is achieved and coma, astigmatism, field curvature and distortion are corrected well.

[0017] Since both surfaces of the sixth lens are aspherical, coma, astigmatism, field curvature, and distortion are corrected favorably.

[0018] The seventh lens has negative refractive power and both surfaces are aspherical, which can effectively correct chromatic aberration, astigmatism, field curvature and distortion. In addition, the concave surface in the paraxial region faces the image side, which can maintain a low profile and ensure a good back focus.

[0019] In the imaging lens of the above structure, it is preferred that the third lens has a convex surface facing the object side in the paraxial region.

[0020] By making the object-side surface of the third lens element convex toward the object side in the paraxial region, spherical aberration, astigmatism and distortion can be corrected well.

[0021] In the imaging lens having the above structure, it is preferable that the third lens has a convex surface facing the image side in the paraxial region.

[0022] By making the image-side surface of the third lens convex toward the image side in the paraxial region, spherical aberration, astigmatism, field curvature and distortion can be corrected well.

[0023] In the imaging lens having the above configuration, it is preferable that the object-side surface of the third lens be formed as an aspherical surface having a pole at a position other than on the optical axis.

[0024] By forming the object-side surface of the third lens element as an aspherical surface having a pole at a position other than the optical axis, astigmatism, field curvature and distortion can be corrected more effectively.

[0025] In the imaging lens having the above configuration, it is preferable that the object-side surface of the sixth lens is formed as an aspherical surface having a pole at a position other than on the optical axis.

[0026] By forming the object-side surface of the sixth lens element as an aspherical surface having a pole at a position other than the optical axis, astigmatism, field curvature and distortion can be corrected more effectively.

[0027] In the imaging lens having the above configuration, it is preferable that the image side surface of the sixth lens is formed as an aspherical surface having a pole at a position other than on the optical axis.

[0028] By forming the image-side surface of the sixth lens as an aspherical surface having a pole at a position other than the optical axis, astigmatism, field curvature and distortion can be corrected more effectively.

[0029] In addition, in the imaging lens having the above structure, it is preferred that the seventh lens has a convex surface facing the object side in the paraxial region.

[0030] By making the object-side surface of the seventh lens element convex toward the object side in the paraxial region, astigmatism, field curvature and distortion can be well corrected.

[0031] In the imaging lens having the above configuration, it is preferable that the image-side surface of the seventh lens is formed as an aspherical surface having a pole at a position other than on the optical axis.

[0032] By forming the image-side surface of the seventh lens as an aspherical surface having a pole at a position other than the optical axis, astigmatism, field curvature and distortion can be corrected more effectively.

[0033] By adopting the above structure, the imaging lens of the present invention can achieve a low profile with an overall aspect ratio (ratio of the overall optical length to the diagonal length of the effective imaging surface of the imaging element) of 0.75 or less, and a low F value of 2.0 or less.

[0034] In addition, in the imaging lens of the above structure, it is preferable that the following conditional expression (1) is satisfied:

[0035] (1) -1.90<f7 / f<-0.30

[0036] in,

[0037] f7: focal length of the seventh lens,

[0038] f: Focal length of the entire camera lens system.

[0039] Conditional expression (1) specifies the focal length of the seventh lens within an appropriate range. When the conditional expression (1) is satisfied, chromatic aberration, astigmatism, field curvature, and distortion can be corrected well.

[0040] In addition, in the imaging lens of the above structure, it is preferable that the following conditional expression (2) is satisfied:

[0041] (2)41.00<|r2| / D1

[0042] r2: paraxial radius of curvature of the image side of the first lens,

[0043] D1: The thickness of the first lens on the optical axis.

[0044] Conditional expression (2) specifies the relationship between the paraxial curvature radius of the image side surface of the first lens and the thickness of the first lens on the optical axis within an appropriate range. By satisfying the range of conditional expression (2), a low profile can be achieved, and coma, astigmatism, and distortion can be corrected well.

[0045] In addition, in the imaging lens of the above structure, it is preferable that the following conditional expression (3) is satisfied:

[0046] (3)1.00<r11 / (T5+D6)<20.00

[0047] r11: the paraxial curvature radius of the object side of the sixth lens,

[0048] T5: The distance on the optical axis from the image side of the fifth lens to the object side of the sixth lens,

[0049] D6: The thickness of the sixth lens on the optical axis.

[0050] Conditional formula (3) specifies the relationship between the paraxial radius of curvature of the object side surface of the sixth lens, the distance on the optical axis from the image side surface of the fifth lens to the object side surface of the sixth lens, and the thickness on the optical axis of the sixth lens within an appropriate range. By satisfying the range of conditional formula (3), low profile can be achieved, and coma, astigmatism, field curvature and distortion can be well corrected.

[0051] In addition, in the imaging lens of the above structure, it is preferable that the following conditional expression (4) is satisfied:

[0052] (4) 0.35<f5 / f<1.58

[0053] in,

[0054] f5: focal length of the fifth lens,

[0055] f: Focal length of the entire camera lens system.

[0056] Conditional expression (4) specifies the focal length of the fifth lens within an appropriate range. By satisfying the range of conditional expression (4), coma, astigmatism, field curvature, and distortion can be corrected well.

[0057] In addition, in the imaging lens of the above structure, it is preferable that the following conditional expression (5) is satisfied:

[0058] (5)-1.70<r6 / f<-0.20

[0059] in,

[0060] r6: paraxial curvature radius of the image side of the third lens,

[0061] f: Focal length of the entire camera lens system.

[0062] Conditional expression (5) specifies the paraxial curvature radius of the image-side surface of the third lens within an appropriate range. By satisfying the range of conditional expression (5), spherical aberration, astigmatism, field curvature, and distortion can be corrected well.

[0063] In addition, in the imaging lens of the above structure, it is preferable that the following conditional expression (6) is satisfied:

[0064] (6)1.10<|r9| / f<7.00

[0065] in,

[0066] r9: the paraxial radius of curvature of the object side of the fifth lens,

[0067] f: Focal length of the entire camera lens system.

[0068] Conditional expression (6) specifies the paraxial curvature radius of the object-side surface of the fifth lens within an appropriate range. By satisfying the range of conditional expression (6), coma, astigmatism, and distortion can be corrected well.

[0069] In addition, in the imaging lens of the above structure, it is preferable that the following conditional expression (7) is satisfied:

[0070] (7) 3.50<r13 / T6<12.50

[0071] r13: paraxial radius of curvature of the object side of the seventh lens,

[0072] T6: The distance on the optical axis from the image side surface of the sixth lens to the object side surface of the seventh lens.

[0073] The conditional expression (7) specifies the relationship between the paraxial curvature radius of the object side surface of the seventh lens and the distance on the optical axis from the image side surface of the sixth lens to the object side surface of the seventh lens within an appropriate range. By satisfying the range of the conditional expression (7), a low profile can be achieved, and astigmatism, field curvature, and distortion can be well corrected.

[0074] In addition, in the imaging lens of the above structure, it is preferable that the following conditional expression (8) is satisfied:

[0075] (8)-1.70<r13 / f7<-0.45

[0076] in,

[0077] r13: paraxial radius of curvature of the object side of the seventh lens,

[0078] f7: focal length of the seventh lens.

[0079] Conditional expression (8) defines the relationship between the paraxial curvature radius of the object-side surface of the seventh lens and the focal length of the seventh lens within an appropriate range. By satisfying the range of conditional expression (8), chromatic aberration, astigmatism, field curvature and distortion can be corrected well.

[0080] In addition, in the imaging lens of the above structure, it is preferable that the following conditional expression (9) is satisfied:

[0081] (9)0.10<(D6 / |f6|)×100<3.00

[0082] in,

[0083] D6: The thickness of the sixth lens on the optical axis,

[0084] f6: focal length of the sixth lens.

[0085] Conditional expression (9) defines the relationship between the thickness of the sixth lens on the optical axis and the focal length of the sixth lens within an appropriate range. By satisfying the range of conditional expression (9), a low profile can be achieved, and coma, astigmatism, field curvature, and distortion can be corrected well.

[0086] In addition, in the imaging lens of the above structure, it is preferable that the following conditional expression (10) is satisfied:

[0087] (10)0.30<(T1 / TTL)×100<0.55

[0088] in,

[0089] T1: The distance on the optical axis from the image side of the first lens to the object side of the second lens.

[0090] TTL: Total optical length.

[0091] Conditional expression (10) specifies the relationship between the distance on the optical axis from the image side surface of the first lens to the object side surface of the second lens and the total optical length within an appropriate range. By satisfying the range of conditional expression (10), low profile can be achieved, and coma, astigmatism and distortion can be well corrected.

[0092] In addition, in the imaging lens of the above structure, it is preferable that the following conditional expression (11) is satisfied:

[0093] (11)18.50<T6 / T5<50.00

[0094] in,

[0095] T6: The distance on the optical axis from the image side of the sixth lens to the object side of the seventh lens,

[0096] T5: The distance on the optical axis from the image side surface of the fifth lens to the object side surface of the sixth lens.

[0097] The conditional expression (11) specifies the relationship between the distance on the optical axis from the image side surface of the sixth lens to the object side surface of the seventh lens and the distance on the optical axis from the image side surface of the fifth lens to the object side surface of the sixth lens within an appropriate range. By satisfying the range of the conditional expression (11), a low profile can be achieved, and coma, astigmatism, field curvature and distortion can be well corrected.

[0098] In addition, in the imaging lens of the above structure, it is preferable that the following conditional expression (12) is satisfied:

[0099] (12)3.50<|f6| / f

[0100] in,

[0101] f6: focal length of the sixth lens,

[0102] f: Focal length of the entire camera lens system.

[0103] Conditional expression (12) specifies the focal length of the sixth lens within an appropriate range. By satisfying the range of conditional expression (12), coma, astigmatism, field curvature, and distortion can be corrected well.

[0104] In addition, in the imaging lens of the above structure, it is preferable that the following conditional expression (13) is satisfied:

[0105] (13)-2.75<f2 / f7<-1.10

[0106] in,

[0107] f2: focal length of the second lens,

[0108] f7: focal length of the seventh lens.

[0109] Conditional expression (13) defines the relationship between the focal length of the second lens and the focal length of the seventh lens within an appropriate range. By satisfying the range of conditional expression (13), chromatic aberration, coma, astigmatism, field curvature and distortion can be corrected well.

[0110] In addition, in the imaging lens of the above structure, it is preferable that the following conditional expression (14) is satisfied:

[0111] (14)0.55<f3 / f2<1.50

[0112] in,

[0113] f3: focal length of the third lens,

[0114] f2: Focal length of the second lens.

[0115] Conditional expression (14) specifies the relationship between the focal length of the third lens and the focal length of the second lens within an appropriate range. By satisfying the range of conditional expression (14), a low profile can be achieved, and spherical aberration, coma, astigmatism, field curvature and distortion can be well corrected.

[0116] In addition, in the imaging lens of the above structure, it is preferable that the following conditional expression (15) is satisfied:

[0117] (15) 0.10<f4 / f5 / f7<0.35

[0118] in,

[0119] f4: focal length of the fourth lens,

[0120] f5: focal length of the fifth lens,

[0121] f7: focal length of the seventh lens.

[0122] Conditional expression (15) specifies the relationship between the focal length of the fourth lens, the focal length of the fifth lens, and the focal length of the seventh lens within an appropriate range. By satisfying the range of conditional expression (15), chromatic aberration, coma, astigmatism, field curvature, and distortion can be corrected well.

[0123] In addition, in the imaging lens of the above structure, it is preferable that the following conditional expression (16) is satisfied:

[0124] (16)2.35<|r2| / f<86.00

[0125] in,

[0126] r2: paraxial radius of curvature of the image side of the first lens,

[0127] f: Focal length of the entire camera lens system.

[0128] Conditional expression (16) specifies the paraxial curvature radius of the image side surface of the first lens within an appropriate range. By satisfying the range of conditional expression (16), coma, astigmatism, and distortion can be corrected well.

[0129] In addition, in the imaging lens of the above structure, it is preferable that the following conditional expression (17) is satisfied:

[0130] (17)35.00<r3 / T1<132.00

[0131] in,

[0132] r3: paraxial radius of curvature of the object side of the second lens,

[0133] T1: The distance on the optical axis from the image side surface of the first lens to the object side surface of the second lens.

[0134] Conditional expression (17) specifies the relationship between the paraxial radius of curvature of the object side surface of the second lens and the distance on the optical axis from the image side surface of the first lens to the object side surface of the second lens within an appropriate range. By satisfying the range of conditional expression (17), low profile can be achieved, and coma, astigmatism, field curvature and distortion can be well corrected.

[0135] In addition, in the imaging lens of the above structure, it is preferable that the following conditional expression (18) is satisfied:

[0136] (18)0.70<|r5| / f<8.00

[0137] in,

[0138] r5: the paraxial radius of curvature of the object side of the third lens,

[0139] f: Focal length of the entire camera lens system.

[0140] Conditional expression (18) specifies the paraxial curvature radius of the object-side surface of the third lens within an appropriate range. By satisfying the range of conditional expression (18), spherical aberration, astigmatism, and distortion can be corrected well.

[0141] In addition, in the imaging lens of the above structure, it is preferable that the following conditional expression (19) is satisfied:

[0142] (19)-12.00<r6 / T3<-2.50

[0143] in,

[0144] r6: paraxial curvature radius of the image side of the third lens,

[0145] T3: The distance on the optical axis from the image side surface of the third lens to the object side surface of the fourth lens.

[0146] Conditional formula (19) specifies the relationship between the paraxial curvature radius of the image side surface of the third lens and the distance on the optical axis from the image side surface of the third lens to the object side surface of the fourth lens within an appropriate range. By satisfying the range of conditional formula (19), low-profile lens can be achieved, and spherical aberration, astigmatism, field curvature and distortion can be well corrected.

[0147] In addition, in the imaging lens of the above structure, it is preferable that the following conditional expression (20) is satisfied:

[0148] (20) 0.20<r11 / f<1.15

[0149] in,

[0150] r11: the paraxial curvature radius of the object side of the sixth lens,

[0151] f: Focal length of the entire camera lens system.

[0152] Conditional expression (20) specifies the paraxial curvature radius of the object-side surface of the sixth lens within an appropriate range. By satisfying the range of conditional expression (20), coma, astigmatism, field curvature, and distortion can be corrected well.

[0153] In addition, in the imaging lens of the above structure, it is preferable that the following conditional expression (21) is satisfied:

[0154] (21)0.10<r12 / r13<1.30

[0155] in,

[0156] r12: paraxial curvature radius of the image side of the sixth lens,

[0157] r13: paraxial radius of curvature of the object side of the seventh lens.

[0158] The conditional expression (21) specifies the relationship between the paraxial curvature radius of the image side surface of the sixth lens and the paraxial curvature radius of the object side surface of the seventh lens within an appropriate range. By satisfying the range of the conditional expression (21), coma, astigmatism, field curvature and distortion can be well corrected.

[0159] In addition, in the imaging lens of the above structure, it is preferable that the following conditional expression (22) is satisfied:

[0160] (22)0.01<r12 / |f6|<0.15

[0161] in,

[0162] r12: paraxial curvature radius of the image side of the sixth lens,

[0163] f6: focal length of the sixth lens.

[0164] Conditional expression (22) defines the relationship between the paraxial curvature radius of the image-side surface of the sixth lens and the focal length of the sixth lens within an appropriate range. By satisfying the range of conditional expression (22), coma, astigmatism, field curvature and distortion can be corrected well.

[0165] In addition, in the imaging lens of the above structure, it is preferable that the following conditional expression (23) is satisfied:

[0166] (23)-0.60<r14 / f7<-0.20

[0167] in,

[0168] r14: paraxial curvature radius of the image side of the seventh lens,

[0169] f7: focal length of the seventh lens.

[0170] Conditional expression (23) defines the relationship between the paraxial curvature radius of the image-side surface of the seventh lens and the focal length of the seventh lens within an appropriate range. By satisfying the range of conditional expression (23), chromatic aberration, astigmatism, field curvature and distortion can be corrected well.

[0171] According to the present invention, it is possible to obtain an imaging lens that satisfies the requirements of low profile and low F value in a balanced manner, corrects various aberrations well, and has high resolution. BRIEF DESCRIPTION OF THE DRAWINGS

[0172] Figure 1 It is a diagram showing a schematic structure of an imaging lens according to Example 1 of the present invention.

[0173] Figure 2 These are diagrams showing spherical aberration, astigmatism, and distortion of the imaging lens according to Example 1 of the present invention.

[0174] Figure 3 A diagram schematically showing the structure of an imaging lens according to Example 2 of the present invention.

[0175] Figure 4 These are diagrams showing spherical aberration, astigmatism, and distortion of the imaging lens according to Example 2 of the present invention.

[0176] Figure 5 A diagram schematically showing the structure of an imaging lens according to Example 3 of the present invention.

[0177] Figure 6 These are diagrams showing spherical aberration, astigmatism, and distortion of the imaging lens according to Example 3 of the present invention.

[0178] Figure 7 A diagram schematically showing the structure of an imaging lens according to Example 4 of the present invention.

[0179] Figure 8 These are diagrams showing spherical aberration, astigmatism, and distortion of the imaging lens according to Example 4 of the present invention.

[0180] Fig. 9 A diagram schematically showing the structure of an imaging lens according to Example 5 of the present invention.

[0181] Fig.10 These are diagrams showing spherical aberration, astigmatism, and distortion of the imaging lens according to Example 5 of the present invention.

[0182] Fig.11 A diagram schematically showing the structure of an imaging lens according to Example 6 of the present invention.

[0183] Fig.12 These are diagrams showing spherical aberration, astigmatism, and distortion of the imaging lens according to Example 6 of the present invention.

[0184] Fig.13 A diagram schematically showing the structure of an imaging lens according to Example 7 of the present invention.

[0185] Fig.14 Graphs showing spherical aberration, astigmatism, and distortion of the imaging lens according to Example 7 of the present invention.

[0186] Fig.15 A diagram schematically showing the structure of an imaging lens according to Example 8 of the present invention.

[0187] Fig.16 Graphs showing spherical aberration, astigmatism, and distortion of the imaging lens according to Example 8 of the present invention.

[0188] Fig.17 A diagram schematically showing the structure of an imaging lens according to Example 9 of the present invention.

[0189] Fig.18 Graphs showing spherical aberration, astigmatism, and distortion of the imaging lens according to Example 9 of the present invention.

[0190] Fig.19 A diagram schematically showing the structure of an imaging lens according to Example 10 of the present invention.

[0191] Fig. 20 These are diagrams showing spherical aberration, astigmatism, and distortion of the imaging lens according to Example 10 of the present invention.

[0192] Fig.21 A diagram schematically showing the structure of an imaging lens according to Example 11 of the present invention.

[0193] Fig. 22 Graphs showing spherical aberration, astigmatism, and distortion of the imaging lens according to Example 11 of the present invention. DETAILED DESCRIPTION

[0194] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0195] Figure 1 , Figure 3 , Figure 5 , Figure 7, Fig. 9 , Fig.11 , Fig.13 , Fig.15 , Fig.17 , Fig.19 and Fig.21 The schematic configuration diagrams of imaging lenses according to Examples 1 to 11 of the embodiments of the present invention are shown below. Figure 1 Embodiments of the present invention will be described in detail.

[0196] like Figure 1 As shown, the camera lens of the present invention comprises, from the object side toward the image side, a first lens L1 having negative optical focal power; a second lens L2 having positive optical focal power; a third lens L3 having positive optical focal power; a fourth lens L4 having negative optical focal power; a fifth lens L5 having positive optical focal power; a sixth lens L6; and a seventh lens L7 having negative optical focal power, wherein the convex surface of the fourth lens L4 in the paraxial zone faces the image side, and the concave surface of the seventh lens L7 in the paraxial zone faces the image side.

[0197] An infrared cut filter, a protective glass or other filter IR is disposed between the seventh lens L7 and the imaging plane IMG (ie, the imaging plane of the imaging element). The filter IR may be omitted.

[0198] The aperture stop ST is disposed between the second lens L2 and the third lens L3, so that distortion correction is easy. In addition, the position of the aperture stop ST is not limited to between the second lens L2 and the third lens L3. It can be appropriately disposed according to the specifications of the imaging element.

[0199] The first lens L1 has negative refractive power and has a meniscus shape with a concave surface facing the object side and a convex surface facing the image side in the paraxial region. In addition, by forming both surfaces aspherical, chromatic aberration, coma, astigmatism and distortion are suppressed.

[0200] In addition, if Figure 5 , Figure 7 and Fig. 9 As shown in the third, fourth and fifth embodiments, the shape of the first lens L1 can also be a biconcave shape with the concave surface facing the object side and the concave surface facing the image side in the paraxial region. In this case, the negative optical power of both surfaces is conducive to suppressing chromatic aberration. In addition, as Fig.17 and Fig.19 As shown in Examples 9 and 10, the shape of the first lens L1 may also be a meniscus shape with a convex surface facing the object side and a concave surface facing the image side in the paraxial region. In this case, chromatic aberration, coma, astigmatism and distortion can be suppressed.

[0201] The second lens L2 has positive refractive power and is in a meniscus shape with a convex surface facing the object side and a concave surface facing the image side in the paraxial region. In addition, both surfaces are formed as aspherical. Therefore, a low profile is achieved and coma, astigmatism, field curvature and distortion are well corrected.

[0202] The third lens L3 has positive optical power and is biconvex in shape with the convex surface facing the object side and the convex surface facing the image side in the paraxial region. In addition, both surfaces are aspherical. Therefore, low profile is achieved and spherical aberration, astigmatism, field curvature and distortion are well corrected.

[0203] The fourth lens L4 has negative optical power and is in a meniscus shape with a concave surface facing the object side and a convex surface facing the image side in the paraxial region. In addition, both surfaces are formed as aspherical. Therefore, chromatic aberration, coma, astigmatism, field curvature and distortion are well corrected.

[0204] The fifth lens L5 has positive optical power and is in a meniscus shape with a concave surface facing the object side and a convex surface facing the image side in the paraxial zone. In addition, both surfaces are formed as aspherical. Therefore, a low profile is achieved and coma, astigmatism, field curvature and distortion are well corrected.

[0205] In addition, if Figure 5 , Figure 7 , Fig. 9 , Fig.11 , Fig.13 , Fig.15 , Fig.17 , Fig.19 and Fig.21 As shown in Examples 3, 4, 5, 6, 7, 8, 9, 10 and 11, the shape of the fifth lens L5 may also be a biconvex shape with a convex surface facing the object side in the paraxial region and a convex surface facing the image side. In this case, the positive refractive power of both surfaces is conducive to low-profile.

[0206] The sixth lens L6 has positive optical power and is in a meniscus shape with a convex surface facing the object side and a concave surface facing the image side in the paraxial region. In addition, both surfaces are formed as aspherical. Therefore, coma, astigmatism, field curvature and distortion are well corrected.

[0207] In addition, if Figure 5 , Figure 7 and Fig. 9 As shown in Examples 3, 4 and 5, the sixth lens L6 may also have a negative optical power, which is beneficial for correcting chromatic aberration, coma, astigmatism, field curvature and distortion.

[0208] In addition, the object-side surface of the sixth lens L6 is formed as an aspherical surface having a pole at a position other than on the optical axis X. Therefore, astigmatism, field curvature, and distortion are corrected well.

[0209] In addition, the image-side surface of the sixth lens L6 is formed as an aspherical surface having a pole at a position other than on the optical axis X. Therefore, astigmatism, field curvature, and distortion are corrected more effectively.

[0210] The seventh lens L7 has negative optical power and is in a meniscus shape with a convex surface facing the object side and a concave surface facing the image side in the paraxial region. In addition, both surfaces are formed as aspherical. Therefore, chromatic aberration, astigmatism, field curvature and distortion are corrected. In addition, by having the seventh lens L7 with a concave surface facing the image side in the paraxial region, a low profile is maintained and a back focus is ensured.

[0211] In addition, the image side surface of the seventh lens L7 is formed as an aspherical surface having a pole at a position other than the optical axis, so astigmatism, field curvature, and distortion are corrected well.

[0212] In the camera lens of this embodiment, it is preferred that all lenses from the first lens L1 to the seventh lens L7 are composed of respective single lenses. Composed of only single lenses, more aspheric surfaces can be used. In this embodiment, by forming all lens surfaces into appropriate aspheric surfaces, various aberrations can be corrected well. In addition, compared with the case of using a cemented lens, since the man-hours can be reduced, it can be manufactured at a low cost.

[0213] Furthermore, the imaging lens of this embodiment uses plastic material for all lenses, so that the manufacturing is easy and mass production is possible at low cost.

[0214] In addition, the lens material used is not limited to plastic materials. By adopting glass materials, higher performance can also be expected. In addition, it is preferred that all lens surfaces are formed as aspherical surfaces, but spherical surfaces that are easy to manufacture can also be adopted according to the required performance.

[0215] The imaging lens in this embodiment satisfies the following conditional expressions (1) to (23), thereby achieving favorable effects.

[0216] (1) -1.90<f7 / f<-0.30

[0217] (2)41.00<|r2| / D1

[0218] (3)1.00<r11 / (T5+D6)<20.00

[0219] (4) 0.35<f5 / f<1.58

[0220] (5)-1.70<r6 / f<-0.20

[0221] (6)1.10<|r9| / f<7.00

[0222] (7) 3.50<r13 / T6<12.50

[0223] (8)-1.70<r13 / f7<-0.45

[0224] (9)0.10<(D6 / |f6|)×100<3.00

[0225] (10)0.30<(T1 / TTL)×100<0.55

[0226] (11)18.50<T6 / T5<50.00

[0227] (12)3.50<|f6| / f

[0228] (13)-2.75<f2 / f7<-1.10

[0229] (14)0.55<f3 / f2<1.50

[0230] (15) 0.10<f4 / f5 / f7<0.35

[0231] (16)2.35<|r2| / f<86.00

[0232] (17)35.00<r3 / T1<132.00

[0233] (18)0.70<|r5| / f<8.00

[0234] (19)-12.00<r6 / T3<-2.50

[0235] (20) 0.20<r11 / f<1.15

[0236] (21)0.10<r12 / r13<1.30

[0237] (22)0.01<r12 / |f6|<0.15

[0238] (23)-0.60<r14 / f7<-0.20

[0239] in,

[0240] D1: thickness of the first lens F1 on the optical axis X,

[0241] D6: thickness of the sixth lens F6 on the optical axis X,

[0242] TTL: total optical length,

[0243] T1: the distance on the optical axis X from the image side surface of the first lens F1 to the object side surface of the second lens F2,

[0244] T3: the distance on the optical axis X from the image side surface of the third lens F3 to the object side surface of the fourth lens F4,

[0245] T5: the distance on the optical axis X from the image side surface of the fifth lens F5 to the object side surface of the sixth lens F6,

[0246] T6: the distance on the optical axis X from the image side surface of the sixth lens F6 to the object side surface of the seventh lens F7,

[0247] f: focal length of the entire camera lens system,

[0248] f2: focal length of the second lens F2,

[0249] f3: focal length of the third lens F3,

[0250] f4: the focal length of the fourth lens F4,

[0251] f5: the focal length of the fifth lens F5,

[0252] f6: focal length of the sixth lens F6,

[0253] f7: the focal length of the seventh lens F7,

[0254] r2: paraxial curvature radius of the image side surface of the first lens F1,

[0255] r3: paraxial radius of curvature of the object side of the second lens F2,

[0256] r5: paraxial radius of curvature of the object side of the third lens F3,

[0257] r6: paraxial radius of curvature of the image side surface of the third lens F3,

[0258] r9: paraxial radius of curvature of the object side of the fifth lens F5,

[0259] r11: paraxial radius of curvature of the object side surface of the sixth lens F6,

[0260] r12: paraxial radius of curvature of the image side surface of the sixth lens F6,

[0261] r13: paraxial radius of curvature of the object side of the seventh lens F7,

[0262] r14: paraxial radius of curvature of the image-side surface of the seventh lens element F7.

[0263] It is not necessary to satisfy all of the above-mentioned conditional expressions, and by satisfying each conditional expression individually, the effects corresponding to each conditional expression can be obtained.

[0264] Furthermore, the imaging lens in this embodiment satisfies the following conditional expressions (1a) to (23a), thereby achieving better effects.<h2 style=";text-align:left;direction:ltr"> <h2 style=";text-align:left;direction:ltr">

[0265] <h2 style=";text-align:left;direction:ltr"> (1a)-1.70<f7 / f<-0.70<h2 style=";text-align:left;direction:ltr"> <h2 style=";text-align:left;direction:ltr">

[0266] <h2 style=";text-align:left;direction:ltr"> (2a)46.00<|r2| / D1<1500.00<h2 style=";text-align:left;direction:ltr"> <h2 style=";text-align:left;direction:ltr">

[0267] <h2 style=";text-align:left;direction:ltr"> (3a)2.50 = r11 / (T5+D6) = 14.00<h2 style=";text-align:left;direction:ltr"> <h2 style=";text-align:left;direction:ltr">

[0268] <h2 style=";text-align:left;direction:ltr"> (4a)0.55<f5 / f<1.40<h2 style=";text-align:left;direction:ltr"> <h2 style=";text-align:left;direction:ltr">

[0269] <h2 style=";text-align:left;direction:ltr"> (5a)-1.45<r6 / f<-0.55<h2 style=";text-align:left;direction:ltr"> <h2 style=";text-align:left;direction:ltr">

[0270] <h2 style=";text-align:left;direction:ltr"> (6a)1.40 = |r9| / f = 6.60<h2 style=";text-align:left;direction:ltr"> <h2 style=";text-align:left;direction:ltr">

[0271] <h2 style=";text-align:left;direction:ltr"> (7a)4.00<r13 / T6<10.50<h2 style=";text-align:left;direction:ltr"> <h2 style=";text-align:left;direction:ltr">

[0272] <h2 style=";text-align:left;direction:ltr"> (8a)-1.45<r13 / f7<-0.50<h2 style=";text-align:left;direction:ltr"> <h2 style=";text-align:left;direction:ltr">

[0273] <h2 style=";text-align:left;direction:ltr"> (9a)0.20 = (D6 / |f6|)×100 = 2.50<h2 style=";text-align:left;direction:ltr"> <h2 style=";text-align:left;direction:ltr">

[0274] <h2 style=";text-align:left;direction:ltr"> (10a)0.40<(T1 / TTL)×100<0.50<h2 style=";text-align:left;direction:ltr"> <h2 style=";text-align:left;direction:ltr">

[0275] <h2 style=";text-align:left;direction:ltr"> (11a)20.50<T6 / T5<41.50<h2 style=";text-align:left;direction:ltr"> <h2 style=";text-align:left;direction:ltr">

[0276] <h2 style=";text-align:left;direction:ltr"> (12a)4.00<|f6| / f<100.00<h2 style=";text-align:left;direction:ltr"> <h2 style=";text-align:left;direction:ltr">

[0277] <h2 style=";text-align:left;direction:ltr"> (13a)-2.20<f2 / f7<-1.30<h2 style=";text-align:left;direction:ltr"> <h2 style=";text-align:left;direction:ltr">

[0278] <h2 style=";text-align:left;direction:ltr"> (14a)0.60<f3 / f2<1.15<h2 style=";text-align:left;direction:ltr"> <h2 style=";text-align:left;direction:ltr">

[0279] <h2 style=";text-align:left;direction:ltr"> (15a)0.13<f4 / f5 / f7<0.25<h2 style=";text-align:left;direction:ltr"> <h2 style=";text-align:left;direction:ltr">

[0280] <h2 style=";text-align:left;direction:ltr"> (16a)2.75<|r2| / f<70.00<h2 style=";text-align:left;direction:ltr"> <h2 style=";text-align:left;direction:ltr">

[0281] <h2 style=";text-align:left;direction:ltr"> (17a)55.00<r3 / T1<110.00<h2 style=";text-align:left;direction:ltr"> <h2 style=";text-align:left;direction:ltr">

[0282] <h2 style=";text-align:left;direction:ltr"> (18a)1.10 = |r5| / f = 6.50<h2 style=";text-align:left;direction:ltr"> <h2 style=";text-align:left;direction:ltr">

[0283] <h2 style=";text-align:left;direction:ltr"> (19a)-11.40<r6 / T3<-3.75<h2 style=";text-align:left;direction:ltr"> <h2 style=";text-align:left;direction:ltr">

[0284] <h2 style=";text-align:left;direction:ltr"> (20a)0.30<r11 / f<0.95<h2 style=";text-align:left;direction:ltr"> <h2 style=";text-align:left;direction:ltr">

[0285] (21a)0.20<r12 / r13<1.10

[0286] (22a)0.01<r12 / |f6|<0.12

[0287] (23a)-0.45<r14 / f7<-0.25

[0288] The symbols of the conditional expressions are the same as those described in the previous paragraph. In addition, only the lower limit value or the upper limit value of the conditional expressions (1a) to (23a) can be applied to the corresponding conditional expressions (1) to (23).

[0289] In this embodiment, the aspheric shape used on the aspheric surface of the lens surface is expressed by mathematical formula 1 when the axis in the optical axis direction is set to Z, the height in the direction perpendicular to the optical axis is set to H, the near-axis curvature radius is set to R, the cone coefficient is set to k, and the aspheric coefficient is set to A4, A6, A8, A10, A12, A14, A16, A18, and A20.

[0290] [Mathematical formula 1]

[0291]

[0292] Next, examples of the imaging lens involved in this embodiment are shown. In each example, f represents the focal length of the entire imaging lens system, Fno represents the F value, ω represents the half field angle, ih represents the maximum image height, and TTL represents the total optical length. In addition, i represents the surface number from the object side, r represents the paraxial curvature radius, d represents the distance between the lens surfaces on the optical axis (surface spacing), Nd represents the refractive index of the d-line (reference wavelength), and νd represents the dispersion coefficient relative to the d-line. In addition, for aspherical surfaces, the symbol * (asterisk) is added after the surface number i to represent it.

[0293] [Example 1]

[0294] Basic lens data are shown in Table 1 below.

[0295] [Table 1]

[0296] Example 1

[0297] Unit: mm

[0298] f=4.91

[0299] Fno=1.80

[0300] ω(°)=46.3

[0301] ih=5.23

[0302] TTL=7.12

[0303] Area data

[0304]

[0305] Composition lens data

[0306]

[0307] Aspheric surface data

[0308]

[0309] The imaging lens of Example 1 achieves an overall aspect ratio of 0.68 and an F value of 1.80. In addition, as shown in Table 12, conditional expressions (1) to (23) are satisfied.

[0310] Figure 2 The spherical aberration (mm), astigmatism (mm), and distortion (%) are shown for the imaging lens of Example 1. The spherical aberration diagram shows the aberration amount for each wavelength of the F line (486nm), d line (588nm), and C line (656nm). In addition, the astigmatism diagram shows the aberration amount of the d line on the sagittal image plane S (solid line) and the aberration amount of the d line on the meridional image plane T (dashed line). Figure 4 , Figure 6 , Figure 8 , Fig.10 , Fig.12 , Fig.14 , Fig.16 , Fig.18 , Fig. 20 and Fig. 22 are the same in the examples. Figure 2 As shown, it can be seen that each aberration is well corrected.

[0311] [Example 2]

[0312] Basic lens data are shown in Table 2 below.

[0313] [Table 2]

[0314] Example 2

[0315] Unit: mm

[0316] f=4.91

[0317] Fno=1.80

[0318] ω(°)=46.3

[0319] ih=5.23

[0320] TTL=7.10

[0321] Area data

[0322]

[0323] Composition lens data

[0324]

[0325] Aspheric surface data

[0326]

[0327] The imaging lens of Example 2 achieves an overall aspect ratio of 0.68 and an F value of 1.80. In addition, as shown in Table 12, conditional expressions (1) to (23) are satisfied.

[0328] Figure 4 For the imaging lens of Example 2, spherical aberration (mm), astigmatism (mm), and distortion (%) are shown. Figure 4 As shown, it can be seen that each aberration is well corrected.

[0329] [Example 3]

[0330] Basic lens data are shown in Table 3 below.

[0331] [Table 3]

[0332] Example 3

[0333] Unit: mm

[0334] f=4.90

[0335] Fno=1.80

[0336] ω(°)=46.2

[0337] ih=5.23

[0338] TTL=7.12

[0339] Area data

[0340]

[0341] Composition lens data

[0342]

[0343] Aspheric surface data

[0344]

[0345] The imaging lens of Example 3 achieves an overall aspect ratio of 0.68 and an F value of 1.80. In addition, as shown in Table 12, conditional expressions (1) to (23) are satisfied.

[0346] Figure 6 For the imaging lens of Example 3, spherical aberration (mm), astigmatism (mm), and distortion (%) are shown. Figure 6 As shown, it can be seen that each aberration is well corrected.

[0347] [Example 4]

[0348] Basic lens data are shown in Table 4 below.

[0349] [Table 4]

[0350] Example 4

[0351] Unit: mm

[0352] f=4.90

[0353] Fno=1.80

[0354] ω(°)=46.1

[0355] ih=5.23

[0356] TTL=7.13

[0357] Area data

[0358]

[0359] Composition lens data

[0360]

[0361] Aspheric surface data

[0362]

[0363] The imaging lens of Example 4 achieves an overall aspect ratio of 0.68 and an F value of 1.80. In addition, as shown in Table 12, conditional expressions (1) to (23) are satisfied.

[0364] Figure 8 For the imaging lens of Example 4, spherical aberration (mm), astigmatism (mm), and distortion (%) are shown. Figure 8 As shown, it can be seen that each aberration is well corrected.

[0365] [Example 5]

[0366] Basic lens data are shown in Table 5 below.

[0367] [Table 5]

[0368] Example 5

[0369] Unit: mm

[0370] f=4.90Fno=1.80

[0371] ω(°)=46.1

[0372] ih=5.23

[0373] TTL=7.13

[0374] Area data

[0375]

[0376] Composition lens data

[0377]

[0378] Aspheric surface data

[0379]

[0380] The imaging lens of Example 5 achieves an overall aspect ratio of 0.68 and an F value of 1.80. In addition, as shown in Table 12, conditional expressions (1) to (23) are satisfied.

[0381] Fig.10 For the imaging lens of Example 5, spherical aberration (mm), astigmatism (mm), and distortion (%) are shown. Fig.10 As shown, it can be seen that each aberration is well corrected.

[0382] [Example 6]

[0383] Basic lens data are shown in Table 6 below.

[0384] [Table 6]

[0385] Example 6

[0386] Unit: mm

[0387] f=4.90

[0388] Fno=1.80

[0389] ω(°)=46.0

[0390] ih=5.23

[0391] TTL=7.12

[0392] Area data

[0393]

[0394] Composition lens data

[0395]

[0396] Aspheric surface data

[0397]

[0398] The imaging lens of Example 6 achieves an overall aspect ratio of 0.68 and an F value of 1.80. In addition, as shown in Table 12, conditional expressions (1) to (23) are satisfied.

[0399] Fig.12 For the imaging lens of Example 6, spherical aberration (mm), astigmatism (mm), and distortion (%) are shown. Fig.12 As shown, it can be seen that each aberration is well corrected.

[0400] [Example 7]

[0401] Basic lens data are shown in Table 7 below.

[0402] [Table 7]

[0403] Example 7

[0404] Unit: mm

[0405] f=4.90

[0406] Fno=1.80

[0407] ω(°)=46.0

[0408] ih=5.23

[0409] TTL=7.12

[0410] Area data

[0411]

[0412] Composition lens data

[0413]

[0414] Aspheric surface data

[0415]

[0416] The imaging lens of Example 7 achieves an overall aspect ratio of 0.68 and an F value of 1.80. In addition, as shown in Table 12, conditional expressions (1) to (23) are satisfied.

[0417] Fig.14 For the imaging lens of Example 7, spherical aberration (mm), astigmatism (mm), and distortion (%) are shown. Fig.14 As shown, it can be seen that each aberration is well corrected.

[0418] [Example 8]

[0419] Basic lens data are shown in Table 8 below.

[0420] [Table 8]

[0421] Example 8

[0422] Unit: mm

[0423] f=4.90

[0424] Fno=1.80

[0425] ω(°)=46.2

[0426] ih=5.23

[0427] TTL=7.12

[0428] Area data

[0429]

[0430] Composition lens data

[0431]

[0432] Aspheric surface data

[0433]

[0434] The imaging lens of Example 8 achieves an overall aspect ratio of 0.68 and an F value of 1.80. In addition, as shown in Table 12, conditional expressions (1) to (23) are satisfied.

[0435] Fig.16 For the imaging lens of Example 8, spherical aberration (mm), astigmatism (mm), and distortion (%) are shown. Fig.16 As shown, it can be seen that each aberration is well corrected.

[0436] [Example 9]

[0437] Basic lens data are shown in Table 9 below.

[0438] [Table 9]

[0439] Example 9

[0440] Unit: mm

[0441] f=4.90

[0442] Fno=1.80

[0443] ω(°)=46.0

[0444] ih=5.23

[0445] TTL=7.13

[0446] Area data

[0447]

[0448] Composition lens data

[0449]

[0450] Aspheric surface data

[0451]

[0452] The imaging lens of Example 9 achieves an overall aspect ratio of 0.68 and an F value of 1.80. In addition, as shown in Table 12, conditional expressions (1) to (23) are satisfied.

[0453] Fig.18 For the imaging lens of Example 9, spherical aberration (mm), astigmatism (mm), and distortion (%) are shown. Fig.18 As shown, it can be seen that each aberration is well corrected.

[0454] [Example 10]

[0455] Basic lens data are shown in Table 10 below.

[0456] [Table 10]

[0457] Example 10

[0458] Unit: mm

[0459] f=4.90

[0460] Fno=1.80

[0461] ω(°)=46.0

[0462] ih=5.23

[0463] TTL=7.13

[0464] Area data

[0465]

[0466] Composition lens data

[0467]

[0468] Aspheric surface data

[0469]

[0470] The imaging lens of Example 10 achieves an overall aspect ratio of 0.68 and an F value of 1.80. In addition, as shown in Table 12, conditional expressions (1) to (23) are satisfied.

[0471] Fig. 20 For the imaging lens of Example 10, spherical aberration (mm), astigmatism (mm), and distortion (%) are shown. Fig. 20 As shown, it can be seen that each aberration is well corrected.

[0472] [Example 11]

[0473] Basic lens data are shown in Table 11 below.

[0474] [Table 11]

[0475] Embodiment 11

[0476] Unit: mm

[0477] f=4.90

[0478] Fno=1.80

[0479] ω(°)=46.0

[0480] ih=5.23

[0481] TTL=7.13

[0482] Area data

[0483]

[0484] Composition lens data

[0485]

[0486] Aspheric surface data

[0487]

[0488] The imaging lens of Example 11 achieves an overall aspect ratio of 0.68 and an F value of 1.80. In addition, as shown in Table 12, conditional expressions (1) to (23) are satisfied.

[0489] Fig. 22 For the imaging lens of Example 11, spherical aberration (mm), astigmatism (mm), and distortion (%) are shown. Fig. 22 As shown, it can be seen that each aberration is well corrected.

[0490] Table 12 shows the values ​​of conditional expressions (1) to (23) according to Examples 1 to 11.

[0491] [Table 12]

[0492] Table 12

[0493]

[0494] Industrial Applicability

[0495] When the imaging lens according to the present invention is applied to a product with a camera function, it can contribute to a lower profile and a lower F value of the camera, and can also achieve higher performance of the camera.

[0496] Description of Reference Numerals

[0497] ST Aperture Stop,

[0498] L1 first lens,

[0499] L2 Second lens,

[0500] L3 third lens,

[0501] L4 fourth lens,

[0502] L5 fifth lens,

[0503] L6 Sixth lens,

[0504] L7 seventh lens,

[0505] IR filter,

[0506] IMG camera surface.

Claims

1. A camera lens, characterized in that: From the object side to the image side, they include: A first lens having negative optical power; A second lens having positive optical power; A third lens having positive optical power; a fourth lens having negative optical power; a fifth lens having positive optical power; a sixth lens; and a seventh lens having negative optical power; The third lens has a convex surface facing the image side in the paraxial zone, the fourth lens has a convex surface facing the image side in the paraxial zone, and the seventh lens has a concave surface facing the image side in the paraxial zone, and the following conditional equations (1), (2), (3) and (4) are satisfied: (1) -1.90<f7 / f<-0.30 (2)41.00＜|r2| / D1 (3)1.00<r11 / (T5+D6)<20.00 (4) 0.35<f5 / f<1.58 in, f7: focal length of the seventh lens, f: focal length of the entire camera lens system, r2: paraxial radius of curvature of the image side of the first lens, D1: The thickness of the first lens on the optical axis, r11: the paraxial curvature radius of the object side of the sixth lens, T5: The distance on the optical axis from the image side of the fifth lens to the object side of the sixth lens, D6: The thickness of the sixth lens on the optical axis, f5: Focal length of the fifth lens.

2. The imaging lens according to claim 1, wherein: The following condition (5) is satisfied: (5)-1.70＜r6 / f＜-0.20 in, r6: paraxial curvature radius of the image side of the third lens, f: Focal length of the entire camera lens system.

3. The imaging lens according to claim 1, wherein: The following condition (6) is satisfied: (6)1.10＜|r9| / f＜7.00 in, r9: the paraxial radius of curvature of the object side of the fifth lens, f: Focal length of the entire camera lens system.

4. The imaging lens according to claim 1, wherein: The following condition (7) is satisfied: (7)3.50＜r13 / T6＜12.50 in, r13: paraxial radius of curvature of the object side of the seventh lens, T6: The distance on the optical axis from the image side surface of the sixth lens to the object side surface of the seventh lens.

5. The imaging lens according to claim 1, wherein: The following condition (8) is satisfied: (8)-1.70＜r13 / f7＜-0.45 in, r13: paraxial radius of curvature of the object side of the seventh lens, f7: focal length of the seventh lens.

Images