Imaging lens system and camera module, imaging device, in-vehicle system, mobile device equipped therewith

Abstract

To provide a compact imaging lens system with bright, high-resolution capabilities. [Solution] The optical system comprises, in order from the object side toward the image side, a first lens having negative power with its image side facing concave toward the image side, a second lens having negative power with its image side facing concave toward the image side, a third lens having positive power with its object side facing concave toward the object side, a fourth lens having positive power, a fifth lens having negative power with its object side facing convex toward the image side, a sixth lens having positive power with its object side facing convex toward the object side, and a seventh lens having positive power, wherein the refractive index of the first lens is nd1, the Abbe number of the first lens is vd1, the Abbe number of the third lens is vd3, the focal length of the third lens is fe3, and the focal length of the entire optical system is fe, and satisfies the following conditions (1), (2), (3), and (4). nd1>1.7(1), vd1<60(2), 19

Description

Technical Field

[0001] The present invention relates to an imaging lens system, a camera module including the same, an imaging device, an in-vehicle system, and a moving body.

Background Art

[0002] In recent years, an imaging lens system for in-vehicle use has been required to have a lens corresponding to a wide view. The imaging lens system for in-vehicle use is used in an in-vehicle camera, and for example, is used for view applications such as front, back, and side, and sensing applications to ensure safety when driving a vehicle.

[0003] The imaging lens system of an in-vehicle camera is required to be an imaging lens system having an extremely wide viewing angle and higher resolution and brighter. Further, an in-vehicle camera mounted on a side mirror or the like of an automobile (vehicle) is required to be miniaturized due to being mounted in a narrow space.

[0004] However, an increase in the number of pixels due to a requirement for higher resolution results in a configuration of a large sensor, that is, an increase in the size of the optical system, and spherical aberration and coma aberration occur. Therefore, the imaging lens system of an in-vehicle camera has a problem of achieving both miniaturization and high resolution.

[0005] On the other hand, a configuration of reducing the pixel size due to a requirement for higher resolution also has a problem. The imaging lens system of an in-vehicle camera needs to be able to image brightly even in a dark place, and the size of one pixel of the sensor requires about 3 microns and has a limit. Therefore, for the high resolution of the imaging lens system of an in-vehicle camera, a configuration of a large sensor due to an increase in the number of pixels is still a problem. Patent Document 1 describes an imaging lens system in an in-vehicle camera.

Prior Art Documents

Patent Documents

[0006]

Patent Document 1

[0007] The present invention has been made in view of the above, and provides a compact imaging lens system with bright and high resolution. [Means for solving the problem]

[0008] The optical system comprises, in order from the object side toward the image side, a first lens having negative power with its image side concave toward the image side, a second lens having negative power with its image side concave toward the image side, a third lens having positive power with its object side concave toward the object side, a fourth lens having positive power, a fifth lens having negative power with its object side convex toward the image side, a sixth lens having positive power with its object side convex toward the object side, and a seventh lens having positive power, wherein the refractive index of the first lens is nd1, the Abbe number of the first lens is vd1, the Abbe number of the third lens is vd3, the focal length of the third lens is fe3, and the focal length of the entire optical system is fe, and satisfies the following conditions (1), (2), (3), and (4). nd1>1.7 ···(1) vd1<60 ···(2) 19 <vd3<26 ···(3) 4 <fe3 / fe<7 ···(4) [Effects of the Invention]

[0009] The present invention can provide a compact imaging lens system with bright and high resolution. [Brief explanation of the drawing]

[0010] [Figure 1] This is a cross-sectional view of the imaging lens system according to Example 1. [Figure 2] This is an aberration diagram of the imaging lens system according to Example 1. [Figure 3] This is a cross-sectional view of the imaging lens system according to Example 2. [Figure 4]It is an aberration diagram of the imaging lens system according to Example 2. [Figure 5] It is a cross-sectional view of the imaging lens system according to Example 3. [Figure 6] It is an aberration diagram of the imaging lens system according to Example 3. [Figure 7] It is a cross-sectional view of the imaging lens system according to Example 4. [Figure 8] It is an aberration diagram of the imaging lens system according to Example 4. [Figure 9] It is a cross-sectional view of the imaging lens system according to Example 5. [Figure 10] It is an aberration diagram of the imaging lens system according to Example 5. [Figure 11] It is a cross-sectional view of the imaging lens system according to Example 6. [Figure 12] It is an aberration diagram of the imaging lens system according to Example 6. [Figure 13] It is a cross-sectional view of the imaging lens system according to Example 7. [Figure 14] It is an aberration diagram of the imaging lens system according to Example 7. [Figure 15] It is a cross-sectional view of the imaging lens system according to Example 8. [Figure 16] It is an aberration diagram of the imaging lens system according to Example 8. [Figure 17] It is a configuration diagram of an imaging device including an imaging lens system. [Figure 18] It is a schematic diagram of a vehicle including an imaging device. [Figure 19] It is a configuration diagram of a vehicle including an imaging device.

Modes for Carrying Out the Invention

[0011] Hereinafter, embodiments of the present invention will be described with reference to the drawings and the like. In the drawings and description of this embodiment, functionally identical elements may sometimes be denoted by the same reference numerals. Although the following description shows embodiments based on principles, these are for understanding this embodiment and are not used to interpret this embodiment restrictively. The description of this embodiment is merely a typical example and does not limit the claims or application examples in any sense.

[0012] Although this embodiment is described in sufficient detail for those skilled in the art to implement, other embodiments are also possible, and it is necessary to understand that configurations and structures can be changed and various elements can be replaced without departing from the scope and spirit of the technical idea. Therefore, the following description should not be construed restrictively.

[0013] In addition, this embodiment can realize a highly reliable system especially in a sensing system, aiming to promote the construction of a resilient infrastructure, inclusive and sustainable industrialization, and the advancement of innovation, targeting "9. Build the foundation of industry and technological innovation" of the Sustainable Development Goals (SDGs) proposed by the United Nations, specifically "9.1 Develop high-quality, reliable, sustainable and resilient infrastructure, including regional and cross-border infrastructure, to support economic development and human well-being with a focus on affordable and equitable access for all people." [Embodiment 1] Hereinafter, based on the embodiments of the present invention, the imaging lens system according to the present invention, a camera module, an imaging device, an in-vehicle system, and a moving body including the same will be described in detail with reference to the drawings.

[0014] FIG. 1 is an example of the first embodiment and also relates to Example 1 based on specific numerical values. Before describing the example including specific numerical values, first, the principle-based embodiment of the present invention will be described.

[0015] When the refractive index of the first lens L1 of the imaging lens system 11 is nd1, the following conditional expression (1) is satisfied. nd1>1.7 ···(1) By satisfying condition (1), the first lens L1 has a small aperture, and the optical system of the imaging lens system 11 can be miniaturized.

[0016] The imaging lens system 11 satisfies the following condition (2) when the Abbe number of the first lens L1 is vd1. vd1<60 ···(2) By satisfying condition (2), the first glass lens L1 has a small aperture, which allows for miniaturization of the optical system of the imaging lens system 11.

[0017] The imaging lens system 11 satisfies the following condition (3) when the Abbe number of the third lens L3 is vd3. 19 <vd3<26 ···(3) By satisfying condition (3), chromatic aberration generated in the reduced-aperture first lens L1 can be corrected by the third lens L3.

[0018] The imaging lens system 11 satisfies the following condition (4) when the focal length of the third lens L3 is fe3 and the focal length of the entire optical system is fe. 4 <fe3 / fe<7 ···(4) By satisfying condition (4), chromatic aberration can be corrected by the third lens L3.

[0019] The imaging lens system 11 satisfies the following condition (5) when Tol is the distance from the object-side lens surface S1 of the first lens L1 to the imaging surface S18 of the image sensor 12 on the optical axis O, and fe is the focal length of the entire optical system. 8 <Tol / fe<10 ···(5) By satisfying condition (5), the optical system can be shortened.

[0020] The imaging lens system 11 satisfies the following condition (6) when the focal length of the cemented lens formed by joining the fifth lens L5 and the sixth lens L6 is fce, and the focal length of the entire optical system is fe. -4 <fce / fe<-2 ···(6) By satisfying condition (6), axial chromatic aberration, spherical aberration, and coma aberration can be properly corrected.

[0021] The imaging lens system 11 satisfies the following condition (7) when the effective diameter of the first lens L1 (front element diameter L1φ) is L1D and the focal length of the entire optical system is fe. 5 <L1D / fe<7 ···(7) By satisfying condition (7), the optical system can be shortened.

[0022] As an embodiment, the imaging lens system 11 of the camera module 10 will be described as an example including specific numerical values.

[0023] [Example 1] Figure 1 is a cross-sectional view showing the lens configuration of the imaging lens system 11 of the camera module 10 of Embodiment 1. As shown in Figure 1, the imaging lens system 11 of Embodiment 1 comprises a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, and a seventh lens L7 in the order of the optical axis O direction from the object side toward the image side.

[0024] Furthermore, the imaging lens system 11 includes a front lens group consisting of a first lens L1, a second lens L2, a third lens L3, and a fourth lens L4, which determine the angle of view characteristics, etc. In addition, the imaging lens system 11 has a front lens group and a rear lens group consisting of a fifth lens L5, a sixth lens L6, and a seventh lens L7, which contribute to brightness, light-gathering characteristics, etc., with the optical aperture 1 in between.

[0025] The first lens L1 has a lens surface S1 which is the object side of a spherical surface with positive curvature and a convex shape toward the object, and a lens surface S2 which is the image side of a spherical surface with negative curvature and a concave shape toward the image. The first lens L1 is a negative lens with a negative power (negative refractive power) that diffuses light rays, and is a meniscus-shaped glass lens with a thicker edge than the center.

[0026] The second lens L2 has an aspherical lens surface S3 with negative curvature and a concave shape on the object side, and an aspherical lens surface S4 with negative curvature and a concave shape on the image side. The second lens L2 is a negative lens with negative power and is made of plastic.

[0027] The third lens L3 has an aspherical lens surface S5 with negative curvature and a concave shape on the object side, and an aspherical lens surface S6 with positive curvature and a convex shape on the image side. The third lens, L3, is a positive glass lens that has positive power where light rays converge, and is thicker towards the center than towards the edges.

[0028] The fourth lens L4 has a spherical lens surface S7 with positive curvature that is convex towards the object side, and a spherical lens surface S8 with positive curvature that is convex towards the image side. The fourth lens L4 is a positive glass lens with positive power.

[0029] The optical diaphragm 1 (STOP) has an opening that allows light rays to pass through the optical diaphragm surface S9, and the amount of light rays is set by the diameter of the opening. The optical diaphragm 1 is made of a non-transparent resin material and has a thin shape.

[0030] The fifth lens L5 has an aspherical lens surface S10 with negative curvature and a concave shape on the object side, and an aspherical lens surface S11 with negative curvature and a concave shape on the image side. The fifth lens L5 is a negative plastic lens with negative power.

[0031] The sixth lens L6 has an aspherical lens surface S12 with positive curvature and a convex shape towards the object, and an aspherical lens surface S13 with negative curvature and a concave shape towards the image. The sixth lens L6 is a positive plastic lens with positive power.

[0032] Furthermore, the image-side lens surface S11 of the fifth lens L5 is bonded to the object-side lens surface S12 of the sixth lens L6 by applying a synthetic resin adhesive or the like, thereby forming a cemented lens with the fifth lens L5 and the sixth lens L6. This cemented lens is a plastic lens with negative power. In addition, the area around the joint and edges of the cemented lens may be coated with a solvent-free resin mixed with carbon black or the like. By combining the fifth lens L5 and the sixth lens L6, axial chromatic aberration and lateral chromatic aberration can be corrected.

[0033] The seventh lens L7 has an aspherical lens surface S14 with positive curvature that is convex towards the object side, and an aspherical lens surface S15 with positive curvature that is convex towards the image side. The seventh lens L7 is a positive glass lens with positive power.

[0034] The first lens L1, third lens L3, fourth lens L4, and seventh lens L7 are glass lenses with excellent heat resistance and weather resistance, and can withstand natural outdoor environments such as sunlight, temperature, humidity, and rain, suppressing focus fluctuations due to changes in ambient temperature. The lens surface S1 of the first lens L1 may be coated with a water-repellent or water-resistant coating. In addition, at least one of the third lens L3, fourth lens L4, and seventh lens L7 may be a glass lens.

[0035] Furthermore, the second lens L2, fifth lens L5, and sixth lens L6 are made of plastic to achieve weight reduction, lower cost, and impact resistance. The third lens L3, fourth lens L4, and seventh lens L7 may also have at least two plastic lenses.

[0036] This allows the imaging lens system 11 to correct chromatic aberration and suppress focus shifts, for example, at high and low temperatures. Furthermore, each lens surface of the first lens L1 to the seventh lens L7 only needs to have a curved surface passing through the optical axis O, similar to the lens surface S2 of the first lens L1, and the edges may be flat.

[0037] The cover glass 13 (CG) of the camera module 10 is a glass plate for protecting the image sensor 12. The cover glass 13 has a CG surface S16 and a CG surface S17. The image sensor 12 (IMG) is an element that captures light rays (images) and has an imaging surface S18.

[0038] Thus, the camera module 10 comprises an imaging lens system 11, an optical aperture 1, a cover glass 13, and an image sensor 12, with each edge fixed to the housing of the camera module 10 or the imaging lens system 11 by a flange or the like. The optical aperture 1 is installed integrally with the imaging lens system 11, but it is not an essential component of the imaging lens system 11, and the optical aperture 1 is optional.

[0039] Furthermore, the optical aperture 1 is installed between the fourth lens L4 and the fifth lens L5, but it may also be installed between the third lens L3 and the fourth lens L4, or at any position between the first lens L1 and the seventh lens L7. By installing the optical aperture 1, the imaging lens system 11 can further reduce the front element diameter of the first lens L1. Moreover, the imaging lens system 11 may have multiple optical apertures.

[0040] Furthermore, the camera module 10 may be equipped with an IR cut filter (IRCF) between the seventh lens L7 and the cover glass 13, or between the cover glass 13 and the image sensor 12, i.e., on the image side of the image sensor 12. Moreover, the camera module 10 does not need to have a cover glass 13.

[0041] Table 1 shows the lens data for each lens surface of the imaging lens system 11 in Example 1.

[0042] [Table 1]

[0043] Table 1, the lens data table, shows the paraxial radius of curvature R, interplanar spacing D, refractive index Nd, and Abbe number vd for each surface. The interplanar spacing D(i) is the distance between surfaces S(i) and S(i+1) on the optical axis O. For example, it indicates that the central thickness on the optical axis O, which is the distance between the object-side lens surface S1 and the image-side lens surface S2, is 0.350 mm. Furthermore, surfaces marked with an asterisk (e.g., lens surface S3 of the second lens L2) indicate aspherical lens surfaces. That is, the second lens L2, the third lens L3, and the fifth lenses L5 through the seventh lenses L7 are aspherical lenses. Such aspherical lens surfaces can effectively correct spherical aberration and coma aberration. The aspherical shapes used for the aspherical lens surfaces in Table 1 are represented by Equation 1.

[0044]

number

[0045] Here, Z is the sag amount. c is the reciprocal of the paraxial radius of curvature R, k is the conicity coefficient, and r is the height from the optical axis. A4, A6, A8, A10, A12, A14, and A16 represent the 4th, 6th, 8th, 10th, 12th, 14th, and 16th order aspherical coefficients, respectively.

[0046] Table 2 shows the aspheric coefficients and other parameters used to define the aspherical shape of the lens surface designated as aspherical in Table 1 in the imaging lens system 11 of Example 1.

[0047] [Table 2]

[0048] In Table 2, for example, "1.808348E-02" means "1.808348 × 10 to the power of -2".

[0049] Table 3 shows the characteristic values ​​for the imaging lens system 11 of Example 1, as shown in Tables 1 and 2.

[0050] [Table 3]

[0051] In the imaging lens system 11, fe represents the focal length of the entire lens system from the first lens L1 to the seventh lens L7. fce represents the focal length of the cemented lens consisting of the fifth lens L5 and the sixth lens L6. fe1 represents the focal length of the first lens L1. fe2 represents the focal length of the second lens L2, fe3 represents the focal length of the third lens L3, fe4 represents the focal length of the fourth lens L4, fe5 represents the focal length of the fifth lens L5, fe6 represents the focal length of the sixth lens L6, and fe7 represents the focal length of the seventh lens L7. L1φ represents the diameter of the first lens L1 (front element). tol represents the total optical length along the optical axis O from the object-side lens surface S1 of the first lens L1 to the imaging surface S18 of the image sensor 12. bf represents the distance along the optical axis O from the image-side lens surface S15 of the seventh lens L7 to the imaging surface S18 of the image sensor 12.

[0052] The Fno (F-number) of the imaging lens system 11 at this time is 2.0, ensuring sufficient light and allowing the imaging lens to be bright, and it is an ultra-wide-angle lens with a half-angle of view of 105° (full-angle 210°). This lens may be, for example, an ultra-wide-angle lens that corresponds to a wide field of view of 130° or more horizontally, or a fisheye lens with a horizontal angle of view of 180° or more. Also, the Fno (F-number) may be smaller than Fno 2.8, which is generally considered a dark optical system, and may be less than 2.0. The imaging lens system 11 corrects various aberrations such as spherical aberration and coma aberration that occur when the effective aperture (e.g., entrance pupil diameter, exit pupil diameter) is increased and a bright optical system (e.g., F-number 2.0) is made.

[0053] Figure 2(a) shows the spherical aberration of the imaging lens system 11 of Example 1. The horizontal axis in Figure 2(a) represents the distance in the direction of the optical axis O. The vertical axis represents the pupil coordinates relative to the entrance pupil diameter. In addition, the solid line in Figure 2(a) represents the wavelength of light ray 0.5461 μm, the dotted line represents the wavelength of light ray 0.6563 μm, the dashed line represents the wavelength of light ray 0.5876 μm, and the dashed line represents the wavelength of light ray 0.4861 μm. Thus, the imaging lens system 11 of Example 1 has little distance deviation in the direction of the optical axis O, and the spherical aberration is corrected to an appropriate range.

[0054] Figure 2(b) shows the field curvature of the imaging lens system 11 of Example 1. In Figure 2(b), the horizontal axis represents the distance in the direction of the optical axis O, and the vertical axis represents the image height (angle of view). In addition, the solid line in Figure 2(b) represents the field curvature in the tangential plane, and the dotted line represents the field curvature in the sagittal plane. Thus, in the imaging lens system 11 of Example 1, the distance deviation in the direction of the optical axis O of each field curvature is small, and the field curvature is corrected to an appropriate range.

[0055] Figure 2(c) shows the distortion aberration of the imaging lens system 11 of Example 1. In Figure 2(c), the horizontal axis represents the ratio in the optical axis O direction, and the vertical axis represents the field of view (image height). As shown above, the imaging lens system 11 of Example 1 has a small ratio in the optical axis O direction, and the distortion aberration is corrected to an appropriate range.

[0056] Figure 2(d) shows the chromatic aberration of the imaging lens system 11 of Example 1. The horizontal axis in Figure 2(d) represents the distance in the direction of the optical axis O. The vertical axis represents the angle of view as a relative value. In addition, the solid line in Figure 2(d) represents the wavelength of light of 0.5461 μm, the dotted line represents the wavelength of light of 0.6563 μm, the dashed line represents the wavelength of light of 0.5876 μm, and the dashed line represents the wavelength of light of 0.4861 μm. Thus, the imaging lens system 11 of Example 1 has little distance deviation in the direction of the optical axis O, and the chromatic aberration of magnification is corrected to an appropriate range.

[0057] [Example 2] Figure 3 is a cross-sectional view showing the configuration of the imaging lens system 11 of the camera module 10 in Example 2. The configuration of the imaging lens system 11 in Example 2 is the same as that of Example 1, so its explanation is omitted. Similarly, the configuration of the camera module 10 in Example 2 is the same as that of Example 1, so its explanation is omitted. This Example 2 differs from Example 1 in lens data, etc., as follows.

[0058] Table 4 shows the lens data for each lens surface of the imaging lens system 11 in Example 2. The lens data in Table 4 shows data for the same items as in Table 1.

[0059] [Table 4]

[0060] Table 5 shows the aspheric coefficients and other parameters used to define the aspherical shape of the aspherical lens surface in the imaging lens system 11 of Example 2. Table 5 shows the same values ​​for the same items as in Table 2.

[0061] [Table 5]

[0062] Table 6 shows the characteristic values ​​for the imaging lens system 11 of Example 2, as shown in Tables 4 and 5, etc., for the same items as shown in Table 3, which shows the characteristic values ​​for Example 1. Note that the F-number of the camera module 10 in this case is a bright 2.0, and the half-angle of view is 105° (full-angle 210°), making it an ultra-wide-angle lens.

[0063] [Table 6]

[0064] Figure 4(a) shows the spherical aberration of the imaging lens system 11 of Example 2, Figure 4(b) shows the field curvature of the imaging lens system 11 of Example 2, Figure 4(c) shows the distortion aberration of the imaging lens system 11 of Example 2, and Figure 4(d) shows the chromatic aberration of the imaging lens system 11 of Example 2.

[0065] Figures 4(a) to 4(d) show graphs for the same items as Figures 2(a) to 2(d), so the explanations for each aberration graph are the same and will be omitted.

[0066] [Example 3] Figure 5 is a cross-sectional view showing the configuration of the imaging lens system 11 of the camera module 10 in Example 3. The configuration of the imaging lens system 11 in Example 3 is the same as that of Example 1, so its explanation is omitted. Similarly, the configuration of the camera module 10 in Example 3 is the same as that of Example 1, so its explanation is omitted. This Example 3 differs from Example 1 in the following ways regarding lens data, etc.

[0067] Table 7 shows the lens data for each lens surface of the imaging lens system 11 in Example 3. The lens data in Table 7 shows data for the same items as in Table 1.

[0068] [Table 7]

[0069] Table 8 shows the aspheric coefficients and other parameters used to define the aspherical shape of the aspherical lens surface in the imaging lens system 11 of Example 3. Table 8 shows the same values ​​for the same items as in Table 2.

[0070] [Table 8]

[0071] Table 9 shows the characteristic values ​​for the imaging lens system 11 of Example 3, as shown in Tables 7 and 8, etc., for the same items as shown in Table 3, which shows the characteristic values ​​for Example 1. Note that the F-number of the camera module 10 in this case is a bright 2.0, and the half-angle of view is 105° (full-angle 210°), making it an ultra-wide-angle lens.

[0072] [Table 9]

[0073] Figure 6(a) shows the spherical aberration of the imaging lens system 11 of Example 3, Figure 6(b) shows the field curvature of the imaging lens system 11 of Example 3, Figure 6(c) shows the distortion aberration of the imaging lens system 11 of Example 3, and Figure 6(d) shows the chromatic aberration of the imaging lens system 11 of Example 3.

[0074] Figures 6(a) to 6(d) show graphs for the same items as Figures 2(a) to 2(d), so the explanations for each aberration graph are the same and will be omitted.

[0075] [Example 4] Figure 7 is a cross-sectional view showing the configuration of the imaging lens system 11 of the camera module 10 in Example 4. The configuration of the imaging lens system 11 in Example 4 is the same as that of Example 1, so its explanation is omitted. Similarly, the configuration of the camera module 10 in Example 4 is the same as that of Example 1, so its explanation is omitted. This Example 4 differs from Example 1 in lens data, etc., as follows.

[0076] Table 10 shows the lens data for each lens surface of the imaging lens system 11 in Example 4. The lens data in Table 10 shows data for the same items as in Table 1. Surfaces marked with an asterisk (*) indicate aspherical lens surfaces. That is, the second lens L2 to the seventh lens L7 are aspherical lenses.

[0077] [Table 10]

[0078] Table 11 shows the aspheric coefficients and other parameters used to define the aspherical shape of the aspherical lens surface in the imaging lens system 11 of Example 4. Table 11 shows the same values ​​for the same items as in Table 2.

[0079] [Table 11]

[0080] Table 12 shows the characteristic values ​​for the imaging lens system 11 of Example 4, as shown in Tables 10 and 11, etc., for the same items as shown in Table 3, which shows the characteristic values ​​for Example 1. Note that the F-number of the camera module 10 in this case is a bright 2.0, and the half-angle of view is 105° (full-angle 210°), making it an ultra-wide-angle lens.

[0081] [Table 12]

[0082] Figure 8(a) shows the spherical aberration of the imaging lens system 11 of Example 4, Figure 8(b) shows the field curvature of the imaging lens system 11 of Example 4, Figure 8(c) shows the distortion aberration of the imaging lens system 11 of Example 4, and Figure 8(d) shows the chromatic aberration of the imaging lens system 11 of Example 4.

[0083] Figures 8(a) to 8(d) show graphs for the same items as Figures 2(a) to 2(d), so the explanations for each aberration graph are the same and will be omitted.

[0084] [Example 5] Figure 9 is a cross-sectional view showing the configuration of the imaging lens system 11 of the camera module 10 of Embodiment 5. The second lens L2 has an aspherical lens surface S3 with positive curvature that is convex towards the object side, and an aspherical lens surface S4 with negative curvature that is concave towards the image side. The second lens L2 is a negative lens with negative power and is made of plastic.

[0085] The configuration of the imaging lens system 11 in Example 5 is the same as in Example 1, except for the second lens L2, so its explanation is omitted. Similarly, the configuration of the camera module 10 in Example 5 is the same as in Example 1, so its explanation is omitted. This Example 5 differs from Example 1 in the following ways regarding lens data, etc.

[0086] Table 13 shows the lens data for each lens surface of the imaging lens system 11 in Example 5. The lens data in Table 13 shows data for the same items as in Table 1. Surfaces marked with an asterisk (*) indicate aspherical lens surfaces. That is, the second lens L2 to the seventh lens L7 are aspherical lenses.

[0087] [Table 13]

[0088] Table 14 shows the aspheric coefficients and other parameters used to define the aspherical shape of the aspherical lens surface in the imaging lens system 11 of Example 5. Table 14 shows the same values ​​for the same items as in Table 2.

[0089] [Table 14]

[0090] Table 15 shows the characteristic values ​​for the imaging lens system 11 of Example 5, as shown in Tables 13 and 14, etc., for the same items as shown in Table 3, which shows the characteristic values ​​for Example 1. Note that the F-number of the camera module 10 in this case is a bright 2.0, and the half-angle of view is 105° (full-angle 210°), making it an ultra-wide-angle lens.

[0091] [Table 15]

[0092] Figure 10(a) shows the spherical aberration of the imaging lens system 11 of Example 5, Figure 10(b) shows the field curvature of the imaging lens system 11 of Example 5, Figure 10(c) shows the distortion aberration of the imaging lens system 11 of Example 5, and Figure 10(d) shows the chromatic aberration of the imaging lens system 11 of Example 5.

[0093] Figures 10(a) to 10(d) show graphs for the same items as Figures 2(a) to 2(d), so the explanations for each aberration graph are the same and will be omitted.

[0094] [Example 6] Figure 11 is a cross-sectional view showing the configuration of the imaging lens system 11 of the camera module 10 in Example 6. The configuration of the imaging lens system 11 in Example 6 is the same as that of Example 1, so its explanation is omitted. Similarly, the configuration of the camera module 10 in Example 6 is the same as that of Example 1, so its explanation is omitted. This Example 6 differs from Example 1 in the following ways regarding lens data, etc.

[0095] Table 16 shows the lens data for each lens surface of the imaging lens system 11 in Example 6. The lens data in Table 16 shows data for the same items as in Table 1.

[0096] [Table 16]

[0097] Table 17 shows the aspheric coefficients and other parameters used to define the aspherical shape of the aspherical lens surface in the imaging lens system 11 of Example 6. Table 17 shows the same values ​​for the same items as in Table 2.

[0098] [Table 17]

[0099] Table 18 shows the characteristic values ​​for the imaging lens system 11 of Example 6, as shown in Tables 16 and 17, etc., for the same items as shown in Table 3, which shows the characteristic values ​​for Example 1. Note that the F-number of the camera module 10 in this case is a bright 2.0, and the half-angle of view is 105° (full-angle 210°), making it an ultra-wide-angle lens.

[0100] [Table 18]

[0101] Figure 12(a) shows the spherical aberration of the imaging lens system 11 of Example 6, Figure 12(b) shows the field curvature of the imaging lens system 11 of Example 6, Figure 12(c) shows the distortion aberration of the imaging lens system 11 of Example 6, and Figure 12(d) shows the chromatic aberration of the imaging lens system 11 of Example 6.

[0102] Figures 12(a) to 12(d) show graphs for the same items as Figures 2(a) to 2(d), so the explanations for each aberration graph are the same and will be omitted.

[0103] [Example 7] Figure 13 is a cross-sectional view showing the configuration of the imaging lens system 11 of the camera module 10 in Example 7. The configuration of the imaging lens system 11 in Example 7 is the same as that of Example 1, so its explanation is omitted. Similarly, the configuration of the camera module 10 in Example 7 is the same as that of Example 1, so its explanation is omitted. This Example 7 differs from Example 1 in the following ways regarding lens data, etc.

[0104] Table 19 shows the lens data for each lens surface of the imaging lens system 11 in Example 7. The lens data in Table 19 shows data for the same items as in Table 1.

[0105] [Table 19]

[0106] Table 20 shows the aspheric coefficients and other parameters used to define the aspherical shape of the aspherical lens surface in the imaging lens system 11 of Example 7. Table 20 shows the same values ​​for the same items as in Table 2.

[0107] [Table 20]

[0108] Table 21 shows the characteristic values ​​for the imaging lens system 11 of Example 7, as shown in Tables 19 and 20, etc., for the same items as shown in Table 3, which shows the characteristic values ​​for Example 1. Note that the F-number of the camera module 10 at this time is a bright 2.0, and the half-angle of view is 103° (full-angle 206°), making it an ultra-wide-angle lens.

[0109] [Table 21]

[0110] Figure 14(a) shows the spherical aberration of the imaging lens system 11 of Example 7, Figure 14(b) shows the field curvature of the imaging lens system 11 of Example 7, Figure 14(c) shows the distortion aberration of the imaging lens system 11 of Example 7, and Figure 14(d) shows the chromatic aberration of the imaging lens system 11 of Example 7.

[0111] Figures 14(a) to 14(d) show graphs for the same items as Figures 2(a) to 2(d), so the explanations for each aberration graph are the same and will be omitted.

[0112] [Example 8] Figure 15 is a cross-sectional view showing the lens configuration of the imaging lens system 11 of the camera module 10 of Embodiment 8. As shown in Figure 15, the imaging lens system 11 of Embodiment 8 comprises a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, and a seventh lens L7 in the order of the optical axis O direction from the object side toward the image side.

[0113] Furthermore, the imaging lens system 11 includes a front lens group that determines the angle of view characteristics, etc., through the first lens L1, the second lens L2, and the third lens L3. In addition, the imaging lens system 11 has a front lens group and a rear lens group that contributes to brightness, light-gathering characteristics, etc., through the fourth lens L4, the fifth lens L5, the sixth lens L6, and the seventh lens L7, with the optical aperture 1 in between. Thus, the optical aperture 1 is installed between the third lens L3 and the fourth lens L4.

[0114] The configuration of the imaging lens system 11 in Example 8 is the same as that of Example 1, except for the position of the optical aperture 1 having the optical aperture surface S91 of Example 8, so its description is omitted. Also, the configuration of the camera module 10 in Example 8 is the same as that of Example 1, so its description is omitted. This Example 8 differs from Example 1 in lens data, etc., as follows.

[0115] Table 22 shows the lens data for each lens surface of the imaging lens system 11 in Example 8. The lens data in Table 22 shows data for the same items as in Table 1.

[0116] [Table 22]

[0117] Table 23 shows the aspheric coefficients and other parameters used to define the aspherical shape of the aspherical lens surface in the imaging lens system 11 of Example 8. Table 23 shows the same values ​​for the same items as in Table 2.

[0118] [Table 23]

[0119] Table 24 shows the characteristic values ​​for the imaging lens system 11 of Example 8, as shown in Tables 22 and 23, etc., for the same items as shown in Table 3, which shows the characteristic values ​​for Example 1. Note that the F-number of the camera module 10 in this case is a bright 2.0, and the half-angle of view is 105° (full-angle 210°), making it an ultra-wide-angle lens.

[0120] [Table 24]

[0121] Figure 16(a) shows the spherical aberration of the imaging lens system 11 of Example 8, Figure 16(b) shows the field curvature of the imaging lens system 11 of Example 8, Figure 16(c) shows the distortion aberration of the imaging lens system 11 of Example 8, and Figure 16(d) shows the chromatic aberration of the imaging lens system 11 of Example 8.

[0122] Figures 16(a) to 16(d) show graphs for the same items as Figures 2(a) to 2(d), so the explanations for each aberration graph are the same and will be omitted.

[0123] [Summary of conditional expressions] Table 25 summarizes the main characteristic values ​​and calculated related values ​​of the imaging lens system 11 in Examples 1 to 8.

[0124] [Table 25]

[0125] The imaging lens system 11 satisfies the following condition (1) when the refractive index of the d line (wavelength 0.5876 μm) of the first lens L1 is nd1. nd1>1.7 ···(1) By satisfying condition (1), the first lens L1 has a small aperture, allowing for miniaturization of the optical system of the imaging lens system 11. Thus, the refractive index nd1 of the first lens L1 is greater than that of the second lens L2 and the third lens L3, resulting in a small aperture for the first lens L1. If the refractive index nd1 is less than 1.7, the first lens L1 becomes larger, making miniaturization of the optical system difficult. Furthermore, it is desirable that the refractive index nd1 be 2.0 or less. It is even better if the refractive index nd1 satisfies 1.8 ≥ nd1 ≥ 1.7.

[0126] The imaging lens system 11 satisfies the following condition (2) when the Abbe number of the first lens L1 is vd1. vd1<60 ···(2) By satisfying condition (2), the first glass lens L1 has a small aperture, allowing for miniaturization of the optical system of the imaging lens system 11. Furthermore, it is desirable that the Abbe number vd1 be 32 or greater. It is even better if the Abbe number vd1 satisfies 41 ≤ vd1 ≤ 54.

[0127] The imaging lens system 11 satisfies the following condition (3) when the Abbe number of the third lens L3 is vd3. 19 <vd3<26 ···(3) By satisfying condition (3), the chromatic aberration generated in the reduced-aperture first lens L1 can be corrected by the third lens L3. Thus, the Abbe number vd3 of the third lens L3 is smaller than the Abbe number vd1 of the first lens L1, and the chromatic aberration when the first lens L1 is reduced in aperture can be corrected. If the Abbe number vd3 is 19 or less, the correction of axial chromatic aberration and lateral chromatic aberration becomes excessive, making chromatic aberration correction difficult. Also, if the Abbe number vd3 is 26 or more, the correction of axial chromatic aberration and lateral chromatic aberration becomes insufficient, making chromatic aberration correction difficult. Furthermore, it is even better if the Abbe number vd3 satisfies 20.0 ≤ nd3 ≤ 20.4.

[0128] The imaging lens system 11 satisfies the following condition (4) when the focal length of the third lens L3 is fe3 and the focal length of the entire optical system is fe. 4 <fe3 / fe<7 ···(4) By satisfying condition (4), chromatic aberration can be corrected by the third lens L3. If fe3 / fe is 4 or less, the correction of axial chromatic aberration and lateral chromatic aberration becomes excessive, making chromatic aberration correction difficult. Also, if fe3 / fe is 7 or more, the correction of axial chromatic aberration and lateral chromatic aberration becomes insufficient, making chromatic aberration correction difficult. Furthermore, it is even better if fe3 / fe satisfies 4.6 ≤ fe3 / fe ≤ 5.9.

[0129] The imaging lens system 11 satisfies the following condition (5) when tol is the distance from the object-side lens surface S1 of the first lens L1 to the imaging surface S18 of the image sensor 12 on the optical axis O, and fe is the focal length of the entire optical system. 8 <tol / fe<10 ···(5) By satisfying condition (5), the optical system can be shortened relative to the size of the image sensor, i.e., miniaturized. If tol / fe is 8 or less, the overall length is too short, making it difficult to maintain proper performance (resolution). Also, if tol / fe is 10 or more, the overall length becomes too long, making miniaturization difficult. Furthermore, it is even better if tol / fe satisfies 9.0 ≤ tol / fe ≤ 9.6.

[0130] The imaging lens system 11 satisfies the following condition (6) when the focal length of the cemented lens formed by joining the fifth lens L5 and the sixth lens L6 is fce, and the focal length of the entire optical system is fe. -4 <fce / fe<-2 ···(6) By satisfying condition (6), axial chromatic aberration, spherical aberration, and coma aberration can be properly corrected, for example, by suppressing focus shifts at high and low temperatures. If fce / fe is -4 or less, the aberration correction is insufficient, and axial chromatic aberration, spherical aberration, and coma aberration cannot be properly corrected. Also, if fce / fe is -2 or greater, the aberration correction is overcorrected, and axial chromatic aberration, spherical aberration, and coma aberration cannot be properly corrected. Furthermore, it is even better if fce / fe satisfies -2.8 ≤ fce / fe ≤ -2.7.

[0131] The imaging lens system 11 satisfies the following condition (7) when the effective diameter of the first lens L1 (front element diameter L1φ) is L1D and the focal length of the entire optical system is fe. 5 <L1D / fe<7 ···(7) By satisfying condition (7), it becomes possible to shorten the optical system by making the effective diameter of the first lens L1 small relative to the size of the image sensor. If L1D / fe is 5 or less, the first lens L1 becomes too small relative to the sensor size of the image sensor 12, making it difficult to maintain various characteristics (especially resolution). Also, if L1D / fe is 7 or more, the first lens L1 becomes too large relative to the sensor size of the image sensor 12, making miniaturization difficult. Furthermore, it is even better if L1D / fe satisfies 6.5 ≤ L1D / fe ≤ 6.6.

[0132] [Differentiation] The present invention is not limited to the embodiments described above, and includes various other modifications. For example, the embodiments described above are described in detail to make the present invention easier to understand, and are not necessarily limited to those having all the configurations described.

[0133] Furthermore, it is possible to replace parts of the configuration of one embodiment with parts of the configuration of another embodiment, and it is also possible to add parts of the configuration of another embodiment to the configuration of one embodiment. In addition, it is possible to add, delete, or replace parts of the configuration of each embodiment with parts of other configurations. [Embodiment 2] Figure 17 shows the configuration of an imaging device 50 equipped with the imaging lens system 11 of Embodiment 1. As shown in the figure, the imaging device 50 according to the embodiment includes a camera module 10 that houses the imaging lens system 11 and an image sensor 12 etc. in a housing (not shown), a control unit 52, and a storage unit 54.

[0134] The control unit 52 controls the camera module 10 and processes the electrical signals output from the image sensor 12 of the camera module 10. This control unit 52 may be composed of, for example, a processor unit (PU), RAM, ROM, etc. The control unit 52 may also include one or more processors.

[0135] The processor may include a general-purpose processor that loads a specific program and executes a specific function, and a dedicated processor specialized for a specific process. The dedicated processor may include an application-specific integrated circuit (IC). An application-specific integrated circuit (ASIC) is also called an application-specific integrated circuit (ASIC). The processor may also include a programmable logic device (Programmable Logic Device). A programmable logic device (PLD) is also called a Programmable Logic Device (PLD). A PLD may include a Field-Programmable Gate Array (FPGA). The control unit 52 may be either a System-on-a-Chip (SoC) or a System-in-a-Package (SiP) in which one or more processors cooperate.

[0136] The storage unit 54 stores various information or parameters related to the operation of the imaging device 50. The storage unit 54 may be composed of, for example, a semiconductor memory. The storage unit 54 may function as a work memory for the control unit 52. The storage unit 54 may store captured images. The storage unit 54 may store various information or parameters for the control unit 52 to perform detection processing and control based on the captured images. The storage unit 54 may be included in the control unit 52.

[0137] As mentioned above, the camera module 10 captures an image of a subject (object) formed via the imaging lens system 11 with the image sensor 12 and outputs the captured image. The image captured by the camera module 10 is also called the captured image.

[0138] The image sensor 12 may be composed of, for example, a CMOS (Complementary Metal Oxide Semiconductor) image sensor or a CCD (Charge Coupled Device). The image sensor 12, positioned at the focal point of the imaging lens system 11, has an imaging surface in which multiple pixels are arranged. Each pixel outputs a signal that is specified by current or voltage according to the amount of incident light. The signal output by each pixel is also called imaging data.

[0139] The imaging data may be read out by the camera module 10 for all pixels and taken into the control unit 52 as an image. The image obtained by reading out all pixels is also called the maximum image. The imaging data may be read out by the camera module 10 for some pixels and taken into the image. In other words, the imaging data may be read out from pixels within a predetermined acquisition range. The imaging data read out from pixels within a predetermined acquisition range may be taken into the image. The predetermined acquisition range may be set by the control unit 52. The camera module 10 may obtain the predetermined acquisition range from the control unit 52. The image sensor 12 may capture an image within a predetermined acquisition range from the subject image formed via the imaging lens system 11. Alternatively, the imaging device 50 (imaging camera) may be an imaging system in which the camera module 10 is a separate unit connected by cables or the like. [Embodiment 3] Figure 18 is a schematic diagram of a vehicle 40 equipped with an in-vehicle system that includes an imaging device 50 comprising an imaging lens system according to Embodiment 1 or Embodiment 2 and an image sensor that converts the light focused through thereon into an electrical signal.

[0140] As shown in Figure 18, the vehicle 40, which is a motor vehicle that travels day and night, is equipped with tires, steering, etc., for driving. The vehicle 40, being a mobile unit, is equipped with an imaging device 50 that can obtain bright, high-resolution images corresponding to a wide field of view. The vehicle 40 is also equipped with an information processing device 42, a display device 43, etc.

[0141] Figure 18 shows several example arrangements illustrating the mounting positions of the imaging devices 50 in the vehicle 40. For example, the first imaging device 50a, which is one of the imaging devices 50, may be placed on or near the front bumper as a camera that monitors the area in front of the vehicle 40 while it is in motion. The second imaging device 50b, which is another imaging device 50 that monitors the area in front, may be placed near the rearview mirror inside the vehicle 40. The third imaging device 50c may be placed on the dashboard or inside the instrument panel, etc., as a camera that monitors the driver's driving conditions. The fourth imaging device 50d may be installed at the rear of the vehicle 40 for use as a rear monitor.

[0142] The first imaging device 50a and the second imaging device 50b can be called front cameras. The third imaging device 50c can be called an in-camera. The fourth imaging device 50d can be called a rear camera. The imaging device 50 is not limited to these, and can be installed in various positions, such as a left-side camera that images the left rear side and a right-side camera that images the right rear side, and is an imaging device that can provide a wide field of view with few blind spots. In this way, the imaging lens system 11 within the imaging device 50 can be installed in various positions on the vehicle 40.

[0143] Figure 19 is a diagram showing the configuration of a vehicle 40 on which an in-vehicle system 41 is mounted, which includes an imaging device 50 comprising an imaging lens system 11 according to Embodiment 1 or Embodiment 2 and an imaging sensor 12 that converts the light focused through thereon into an electrical signal.

[0144] As shown in Figure 19, the imaging device 50 mounted on the vehicle 40 as an automobile can also be called an on-board camera and can be installed in various locations on the vehicle 40. Furthermore, the on-board system 41 equipped with the imaging device 50 etc. mounted on the vehicle 40 as an automobile is also a mobile system equipped with the imaging device 50 etc. mounted on a mobile body. In other words, the mobile body is not limited to the vehicle 40 as an automobile, but includes, for example, a moving bicycle, motorcycle, wheelchair, train, drone, helicopter, airplane, ship, etc.

[0145] As shown in Figure 19, the image signal of the captured image captured by the imaging device 50 is output to the information processing device 42, display device 43, etc. of the vehicle 40 via a cable or bus, etc. Furthermore, the image signal of the captured image may be output to the information processing device, display device, etc. of the control center via wireless or network, etc. The in-vehicle system 41 comprises at least the information processing device 42 and the imaging device 50. The in-vehicle system 41 may also comprise the information processing device 42, the imaging device 50, and the display device 43, etc.

[0146] The information processing device 42 of the vehicle 40 acquires the captured image output from the camera module 10 of the imaging device 50 and processes the image signal of the captured image. The information processing device 42 may also process the captured images acquired by the first imaging device 50a and the second imaging device 50b, which are imaging devices 50 as shown in Figure 18, by combining them. The information processing device 42 may be composed of, for example, a processor unit (PU), RAM, ROM, etc.

[0147] The information processing device 42 recognizes various objects in the captured image, such as people (including the driver of the vehicle 40 captured by the in-camera), other vehicles, other moving objects, animals, roads, and road signs, and generates recognition information such as images of the objects, their type, location, and speed of movement.

[0148] The captured images may be images of the vehicle 40 in the direction of movement, or one or more images that meet predetermined conditions, for example, one image when the vehicle 40 is traveling at a predetermined speed or higher, and multiple images when it is traveling at a speed lower than that.

[0149] The information processing device 42 includes devices that assist the driver in driving. For example, the information processing device 42 includes, but is not limited to, a navigation system, a collision mitigation braking system, a distance control device, and a lane departure warning system.

[0150] The display device 43 displays images and other recognition information processed and output by the information processing device 42 as an output device, but it may also notify audio, which is recognition information corresponding to the images and other recognition information, using an audio output device as an output device.

[0151] Furthermore, the display device 43 may employ, but is not limited to, a liquid crystal display (LCD), an organic electro-luminescence (EL) display, or an inorganic EL display. The display device 43 can also directly receive image signals, such as captured images output from an imaging device 50 that captures images from a position difficult for the driver to see, such as a rear camera, for example, a fourth imaging device 50d, and display the captured images to the driver or other occupants. The display device 43 may also be an output device equipped with an audio output device that outputs sound, etc., based on the image signal.

[0152] It should be noted that the present invention is not limited to the embodiments described above, and can be modified as appropriate without departing from the spirit of the invention. For example, the applications of the imaging lens system 11 of the present invention are not limited to in-vehicle cameras, but can also be used in other applications such as fixed surveillance cameras, digital cameras, and cameras mounted on small electronic devices such as portable mobile phones.

[0153] Furthermore, the present invention includes various embodiments other than those described above. For example, the above-described embodiments are explained in detail to make the present invention easier to understand, and are not necessarily limited to those having all the configurations described.

[0154] Furthermore, the present invention allows for the replacement of parts of the configuration of one embodiment with the configuration of another embodiment, and also allows for the addition of configurations from other embodiments to the configuration of one embodiment. In addition, the present invention allows for the addition, deletion, and replacement of parts of the configuration of each embodiment with other configurations. [Explanation of symbols]

[0155] 1: Optical aperture (STOP), 10: Camera module, 11: Imaging lens system, 12: Image sensor (IMG), 13: Cover glass (CG), 40: Vehicles, 41: In-vehicle systems, 42: Information processing equipment, 43:Display device, 50, 50a, 50b, 50c, 50d: Imaging devices (imaging cameras, in-vehicle cameras) 52: Control unit, 54: Memory section, L1: First lens, L2: Second lens, L3: Third lens, L4: Fourth lens, L5: Fifth lens, L6: 6th lens, L7: 7th lens, S1~S8, S10~S15: Lens surface, S9, S91: Optical aperture surface, S16, S17: CG surface, S18: Imaging plane.

Claims

1. Starting from the object side and moving towards the image side, A first lens having negative power with its image side facing the image side as a concave surface, A second lens having negative power with the image side facing the image side as a concave surface, A third lens having positive power with the side of the object facing the object with a concave surface, The fourth lens has positive power, A fifth lens having negative power with the object's side surface facing the image side, A sixth lens having positive power with the side surface of the object facing the object, It has a seventh lens with positive power, An imaging lens system that satisfies the following conditions (1), (2), (3), and (4), where nd1 is the refractive index of the first lens, vd1 is the Abbe number of the first lens, vd3 is the Abbe number of the third lens, fe3 is the focal length of the third lens, and fe is the focal length of the entire optical system. nd1>1.7...(1) vd1<60...(2) 19<vd3<26...(3) 4<fe3 / fe<7...(4)

2. In the imaging lens system described in claim 1, An imaging lens system that satisfies the following condition (5), where tol is the distance from the object-side surface of the first lens to the imaging surface of the image sensor on the optical axis. 8<tol / fe<10...(5)

3. In the imaging lens system described in claim 1, An imaging lens system that satisfies the following condition (6), where fce is the focal length of the cemented lens formed by joining the fifth lens and the sixth lens. -4<fce / fe<-2...(6)

4. In the imaging lens system described in claim 3, The aforementioned cemented lens is an imaging lens system having negative power.

5. In the imaging lens system described in claim 3, The aforementioned cemented lens is an imaging lens system having a plastic lens.

6. In the imaging lens system described in claim 1, An imaging lens system that satisfies the following condition (7) when the effective diameter of the first lens is L1D. 5<L1D / f<7 (7)

7. In the imaging lens system described in claim 1, An imaging lens system in which an optical aperture is positioned between the third lens and the fourth lens, or between the fourth lens and the fifth lens.

8. In the imaging lens system described in claim 1, The first lens is a glass lens, forming an imaging lens system.

9. In the imaging lens system described in claim 1, An imaging lens system in which the third lens, the fourth lens, and the seventh lens are at least one glass lens.

10. In the imaging lens system described in claim 1, An imaging lens system with a horizontal field of view of 130 degrees or more.

11. A camera module comprising: an imaging lens system according to any one of claims 1 to 10; and an image sensor that converts light focused through the imaging lens system into an electrical signal.

12. An imaging device comprising: a camera module according to claim 11; a control unit for controlling the camera module; and a storage unit for storing information for the control unit to perform control.

13. An in-vehicle system comprising a camera module according to claim 11, and an information processing device that recognizes an object in an image captured by the camera module and generates recognition information.

14. A mobile body comprising: a camera module according to claim 11; an information processing device that recognizes an object in an image captured by the camera module and generates recognition information; and an output device that outputs the recognition information.

Images