Photographic lens system

Abstract

The present application provides a kind of photographic lens system, the photographic lens system contains seven pieces of lens, which are sequentially from object side to image side: first lens, second lens, third lens, fourth lens, fifth lens, sixth lens and seventh lens.In the first lens to the seventh lens, each lens includes a object side surface towards object side direction and an image side surface towards image side direction, the first lens has negative refractive power, the second lens has negative refractive power, the third lens has positive refractive power, and the seventh lens image side surface is concave at near optical axis and has at least one inflection point at off-axis.The present application can improve the comprehensive performance of imaging quality, sensitivity, aperture size, volume, angle of view, etc. of lens.

Description

[0001] This invention is a divisional application of a patent application for an invention named "Photographic Lens System, Imaging Device and Electronic Device" with an application date of July 23, 2019 and an application number of "201910666157.0". Technical Field

[0002] The present invention relates to the technical field of optical lenses, and particularly to a photographic lens system and an imaging device applicable to electronic devices. Background Art

[0003] With the continuous improvement of semiconductor process technology, the performance of electronic photosensitive elements has been enhanced, and pixels can reach a smaller size. Therefore, an optical lens with high imaging quality has become an essential part.

[0004] With the rapid development of technology, the application range of electronic devices equipped with optical lenses is more extensive, and the requirements for optical lenses are also more diverse. Since it is relatively difficult for existing optical lenses to balance the requirements of imaging quality, sensitivity, aperture size, volume or viewing angle, etc., the present invention provides an optical lens to meet the requirements. Summary of the Invention

[0005] An embodiment of the present invention provides a photographic lens system, which includes seven lenses. The seven lenses are, in order from the object side to the image side: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens. Among the first lens to the seventh lens, each lens includes an object side surface facing the object side and an image side surface facing the image side. The first lens has a negative refractive power, the second lens has a negative refractive power, the third lens has a positive refractive power, the image side surface of the third lens is convex near the optical axis, the seventh lens has a negative refractive power, the image side surface of the seventh lens is concave near the optical axis and has at least one inflection point off the axis. The total number of lenses in the photographic lens system is seven. The photographic lens system further includes an aperture between the second lens and the third lens. The distance on the optical axis between the object side surface of the first lens and an imaging surface is TL, the focal length of the photographic lens system is f, the maximum image height of the photographic lens system is ImgH, the sum of the spacing distances on the optical axis between all adjacent lenses in the photographic lens system is ΣAT, and the sum of the thicknesses of all lenses on the optical axis in the photographic lens system is ΣCT, satisfying the following relationships:

[0006] 0.80 < TL / f < 3.60;

[0007] 1.0 < TL / ImgH < 2.10; and

[0008] 0.10 < ΣAT / ΣCT < 0.83.

[0009] An embodiment of the present invention further provides a photographic lens system, which includes seven lenses. The seven lenses are, in order from the object side to the image side: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens. Among the first lens to the seventh lens, each lens includes an object side surface facing the object side and an image side surface facing the image side. The first lens has a negative refractive power, the second lens has a negative refractive power, the third lens has a positive refractive power, the seventh lens has a negative refractive power, the image side surface of the seventh lens is concave near the optical axis and has at least one inflection point off the axis. The total number of lenses in the photographic lens system is seven. The distance between the object side surface of the first lens and an imaging surface on the optical axis is TL, the focal length of the photographic lens system is f, the maximum image height of the photographic lens system is ImgH, the distance between the third lens and the fourth lens on the optical axis is T34, the distance between the fourth lens and the fifth lens on the optical axis is T45, the distance between the fifth lens and the sixth lens on the optical axis is T56, and the distance between the sixth lens and the seventh lens on the optical axis is T67. The following relationships are satisfied:

[0010] 0.80 < TL / f < 3.60;

[0011] 1.0 < TL / ImgH < 2.10; and

[0012] 0.20 < (T34 + T56 + T67) / T45 < 2.80.

[0013] An embodiment of the present invention further provides a photographic lens system, which includes seven lenses. The seven lenses are, in order from the object side to the image side: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens. Among the first lens to the seventh lens, each lens includes an object side surface facing the object side and an image side surface facing the image side. The first lens has a negative refractive power, the second lens has a negative refractive power, the third lens has a positive refractive power, the image side surface of the seventh lens is concave near the optical axis and has at least one inflection point off the axis. The total number of lenses in the photographic lens system is seven. The distance between the object side surface of the first lens and an imaging surface on the optical axis is TL, the focal length of the photographic lens system is f, the focal length of the third lens is f3, the focal length of the sixth lens is f6, the maximum image height of the photographic lens system is ImgH, the sum of the spacing distances between all adjacent lenses of the photographic lens system on the optical axis is ΣAT, and the sum of the thicknesses of each lens of the photographic lens system on the optical axis is ΣCT. The following relationships are satisfied:

[0014] 0.80 < TL / f < 3.60;

[0015] 2.0 < (f / f3) + (f / f6) < 5.0;

[0016] 1.0 < TL / ImgH < 2.10; and

[0017] 0.10 < ΣAT / ΣCT < 0.83.

[0018] When TL / f satisfies the above conditions, the total length of the system can be balanced and the viewing angle can be controlled.

[0019] When TL / ImgH satisfies the above conditions, while the system pursues miniaturization, it can maintain a sufficient light receiving area to maintain sufficient brightness of the image.

[0020] When ΣAT / ΣCT satisfies the above conditions, the lens spacing can be effectively controlled to improve the space utilization efficiency and avoid space waste.

[0021] When (T34 + T56 + T67) / T45 satisfies the above conditions, the system space can be effectively balanced to facilitate lens assembly, thereby improving the product yield.

[0022] When (f / f3) + (f / f6) satisfies the above conditions, sufficient converging ability can be provided to meet the appropriate specification requirements within a limited space. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts. In the drawings:

[0024] Figure 1A is a schematic diagram of an image pickup device according to the first embodiment of the present invention;

[0025] Figure 1B is an aberration curve diagram according to the first embodiment of the present invention;

[0026] Figure 2A is a schematic diagram of an image pickup device according to the second embodiment of the present invention;

[0027] Figure 2B is an aberration curve diagram according to the second embodiment of the present invention;

[0028] Figure 3A is a schematic diagram of an image pickup device according to the third embodiment of the present invention;

[0029] Figure 3B is an aberration curve diagram according to the third embodiment of the present invention;

[0030] Figure 4A is a schematic diagram of an image pickup device according to the fourth embodiment of the present invention;

[0031] Figure 4B This is an aberration curve diagram of the fourth embodiment of the present invention;

[0032] Figure 5A This is a schematic diagram of the imaging device according to the fifth embodiment of the present invention;

[0033] Figure 5B This is an aberration curve diagram of the fifth embodiment of the present invention;

[0034] Figure 6A This is a schematic diagram of the imaging device according to the sixth embodiment of the present invention;

[0035] Figure 6B This is an aberration curve diagram of the sixth embodiment of the present invention;

[0036] Figure 7A This is a schematic diagram of the imaging device according to the seventh embodiment of the present invention;

[0037] Figure 7B This is an aberration curve diagram of the seventh embodiment of the present invention;

[0038] Figure 8A This is a schematic diagram of the imaging device according to the eighth embodiment of the present invention;

[0039] Figure 8B This is an aberration curve diagram of the eighth embodiment of the present invention;

[0040] Figure 9A This is a schematic diagram of the imaging device according to the ninth embodiment of the present invention;

[0041] Figure 9B This is an aberration curve diagram of the ninth embodiment of the present invention;

[0042] Figure 10 This is a schematic diagram of parameter Yc52, which is an example of the first embodiment of the present invention;

[0043] Figure 11 This is a three-dimensional schematic diagram of an image-capturing device according to the tenth embodiment of the present invention;

[0044] Figure 12A This is a front view of an electronic device according to the eleventh embodiment of the present invention;

[0045] Figure 12B This is a rear view of the electronic device according to the eleventh embodiment of the present invention;

[0046] 10a Imaging Device;

[0047] 11a imaging lens;

[0048] 12a drive unit;

[0049] 13a electronic photosensitive element;

[0050] 14a image stabilization module;

[0051] Apertures of 100, 200, 300, 400, 500, 600, 700, 800, and 900;

[0052] 110, 210, 310, 410, 510, 610, 710, 810, 910 First Lens;

[0053] Side views of objects 111, 211, 311, 411, 511, 611, 711, 811, and 911;

[0054] 112, 212, 312, 412, 512, 612, 712, 812, 912 are side views;

[0055] Second lenses of 120, 220, 320, 420, 520, 620, 720, 820, and 920;

[0056] Side views of objects 121, 221, 321, 421, 521, 621, 721, 821, and 921;

[0057] 122, 222, 322, 422, 522, 622, 722, 822, 922 are side views;

[0058] Third lenses: 130, 230, 330, 430, 530, 630, 730, 830, 930;

[0059] Side views of objects 131, 231, 331, 431, 531, 631, 731, 831, and 931;

[0060] 132, 232, 332, 432, 532, 632, 732, 832, 932 are side views;

[0061] Fourth lenses: 140, 240, 340, 440, 540, 640, 740, 840, 940;

[0062] Side views of objects 141, 241, 341, 441, 541, 641, 741, 841, and 941;

[0063] 142, 242, 342, 442, 542, 642, 742, 842, 942 are side views;

[0064] Fifth lenses: 150, 250, 350, 450, 550, 650, 750, 850, 950;

[0065] Side views of objects 151, 251, 351, 451, 551, 651, 751, 851, and 951;

[0066] 152, 252, 352, 452, 552, 652, 752, 852, 952 are side views;

[0067] 160, 260, 360, 460, 560, 660, 760, 860, 960 sixth lenses;

[0068] Side views of objects numbered 161, 261, 361, 461, 561, 661, 761, 861, and 961;

[0069] 162, 262, 362, 462, 562, 662, 762, 862, 962 are side views;

[0070] 170, 270, 370, 470, 570, 670, 770, 870, 970 seventh lenses;

[0071] Side views of objects 171, 271, 371, 471, 571, 671, 771, 871, and 971;

[0072] 172, 272, 372, 472, 572, 672, 772, 872, 972 are side views;

[0073] 180, 280, 380, 480, 580, 680, 780, 880, 980 filter elements;

[0074] Imaging planes of 190°, 290°, 390°, 490°, 590°, 690°, 790°, 890°, and 990°.

[0075] 195, 295, 395, 495, 595, 695, 795, 895, 995 electronic photosensitive elements;

[0076] 1200 electronic devices;

[0077] Image acquisition devices 1201, 1202, 1203, and 1204;

[0078] 1200 electronic devices;

[0079] 1205 display device;

[0080] The focal length of the f-type photographic lens system;

[0081] Aperture value of the Fno photographic lens system;

[0082] Half of the maximum field of view in the HFOV imaging lens system;

[0083] Maximum image height of the ImgH photographic lens system;

[0084] Entrance pupil diameter of EPD imaging lens system;

[0085] The Abbe number of the first lens, V1;

[0086] The Abbe number of the second lens V2;

[0087] Abbe number of the third lens in V3;

[0088] Abbe number of the fourth lens in V4;

[0089] Abbe number of the fifth lens in V5;

[0090] Abbe number of the sixth lens of V6;

[0091] Abbe number of the seventh lens in V7;

[0092] Vmin is the smallest Abbe number among the seven lenses;

[0093] The refractive index of the first lens, N1;

[0094] The refractive index of the second lens N2;

[0095] The refractive index of the third lens N3;

[0096] The refractive index of the fourth lens N4;

[0097] The refractive index of the fifth lens of N5;

[0098] The refractive index of the N6 sixth lens;

[0099] The refractive index of the N7 seventh lens;

[0100] The distance on the optical axis between the third and fourth lenses of T34;

[0101] The distance on the optical axis between the fourth and fifth lenses of T45;

[0102] The distance on the optical axis between the fifth and sixth lenses of T56;

[0103] The distance on the optical axis between the sixth and seventh lenses of T67;

[0104] R1 is the radius of curvature of the object side surface of the first lens;

[0105] R2 is the radius of curvature of the side surface of the first lens;

[0106] R4 is the radius of curvature of the side surface of the second lens;

[0107] R5 is the radius of curvature of the object side surface of the third lens;

[0108] R6 Third Lens Image Side Radius of Curvature;

[0109] R8 fourth lens image side curvature radius;

[0110] R10 is the radius of curvature of the side surface of the fifth lens;

[0111] R13 Seventh Lens Object Side Radius of Curvature;

[0112] f1 is the focal length of the first lens;

[0113] f2 is the focal length of the second lens;

[0114] The focal length of the third lens at f3;

[0115] The focal length of the fourth lens at f4;

[0116] The focal length of the fifth lens at f5;

[0117] The focal length of the sixth lens (f6);

[0118] The focal length of the seventh lens at f7;

[0119] The distance on the optical axis between the object side surface of the first lens (TL) and the imaging plane.

[0120] The distance on the optical axis between the SD aperture and the side of the image of the seventh lens;

[0121] The sum of the distances between all two adjacent lenses in the ΣAT imaging lens system along the optical axis; the sum of the thicknesses of all lenses in the ΣCT imaging lens system along the optical axis;

[0122] The distance on the optical axis between the image side surface and the imaging plane of the BL seventh lens. Detailed Implementation

[0123] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. Here, the illustrative embodiments of the present invention and their descriptions are used to explain the present invention, but are not intended to limit the present invention.

[0124] This invention provides a photographic lens system comprising seven lenses, arranged sequentially from the object side to the image side as: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens. Each of the first to seventh lenses includes an object-side surface facing the object side and an image-side surface facing the image side.

[0125] The first lens may have a negative refractive power, which is conducive to forming a retrofocus structure and can expand the viewing angle of the lens. The object side surface of the first lens may be concave near the optical axis, which helps to compress the volume in the wide-angle configuration. The first lens has an inflection point, which can effectively control the effective diameter of the first lens to avoid the excessive size of the object end of the lens and affect the product volume and appearance.

[0126] The second lens may have a negative refractive power, which can effectively share the negative refractive power of the first lens, enabling the system to meet the specification requirements while maintaining the image quality. The image side surface of the second lens may be concave near the optical axis, which can effectively control the light path direction and balance the imaging quality of each field of view.

[0127] The third lens may have a positive refractive power, which can provide the main converging ability of the system to effectively compress the system space and meet the miniaturization requirements. The object side surface of the third lens may be convex near the optical axis, which can enhance the light path control ability of the third lens to improve the light condensing ability of the system.

[0128] The fourth lens may have a negative refractive power, which can balance the chromatic aberration generated by the third lens. The image side surface of the fourth lens may be concave near the optical axis, which is conducive to correcting the light path and improving the image quality.

[0129] The object side surface of the fifth lens may be convex near the optical axis, which helps to correct the image curvature of the system. The image side surface of the fifth lens may be concave near the optical axis, which can effectively control the shape of the fifth lens to facilitate the correction of astigmatism and coma.

[0130] The sixth lens may have a positive refractive power, which can provide the light path converging ability at the image side end of the system to facilitate the control of the overall optical length. The image side surface of the sixth lens may be convex near the optical axis, which can ensure that the sixth lens has sufficient converging ability to avoid the insufficient concentration of the light path and affect the overall system length. The sixth lens may have an inflection point to effectively correct the off-axis aberration and improve the image quality.

[0131] The seventh lens may have a negative refractive power, which can effectively control the back focal length of the system to avoid excessive overall length. The object side surface of the seventh lens may be convex near the optical axis, which can balance the light path directions in the tangential and sagittal directions to facilitate the correction of the system astigmatism. The image side surface of the seventh lens is concave near the optical axis and has at least one inflection point off the axis, which is conducive to reducing the back focal length of the system, meeting the miniaturization characteristics, and making the Petzval surface of the system flatter.

[0132] The distance between the object side surface of the first lens and an imaging surface on the optical axis is TL, and the focal length of the photographic lens system is f. When the photographic lens system satisfies the following relationship: 0.80 < TL / f < 3.60, it can balance the overall system length and control the field of view size. It can also satisfy 1.0 < TL / f < 2.60.

[0133] The distance on the optical axis between the object side surface of the first lens and the imaging surface is TL, and the maximum image height of the photographic lens system is ImgH. When the photographic lens system satisfies the following relationship: 1.0 < TL / ImgH < 2.10, while pursuing miniaturization of the system, it can maintain a sufficient light-receiving area to maintain sufficient brightness of the image. It can also satisfy 1.20 < TL / ImgH < 1.80.

[0134] The focal length of the photographic lens system is f, and the radius of curvature of the image side surface of the fourth lens is R8. When the photographic lens system satisfies the following relationship: 0.30 < f / R8 < 8.0, it can balance the curvature intensity of the image side surface of the fourth lens to provide better aberration correction ability.

[0135] The sum of the spacing distances on the optical axis between all adjacent lenses in the photographic lens system is ΣAT, and the sum of the thicknesses of all lenses on the optical axis in the photographic lens system is ΣCT. When the photographic lens system satisfies the following relationship: 0.10 < ΣAT / ΣCT < 0.83, it can effectively control the lens spacing to improve the space utilization efficiency and avoid space waste. It can also satisfy 0.08 < ΣAT / ΣCT < 0.61.

[0136] The smallest Abbe number among the seven lenses is Vmin. When the photographic lens system satisfies the following relationship: 10.0 < Vmin < 22.0, it can ensure that the lens materials in the system have sufficient ability to control light, balance the focusing positions of light in different bands, and avoid the occurrence of image overlap. It can also satisfy 10.0 < Vmin < 20.0. It can also satisfy 10.0 < Vmin < 19.0.

[0137] The distance on the optical axis between the third lens and the fourth lens is T34, the distance on the optical axis between the fourth lens and the fifth lens is T45, the distance on the optical axis between the fifth lens and the sixth lens is T56, and the distance on the optical axis between the sixth lens and the seventh lens is T67. When the photographic lens system satisfies the following relationship: 0.20 < (T34 + T56 + T67) / T45 < 2.80, it can effectively balance the system space to facilitate lens assembly and thus improve the product yield. It can also satisfy 0.20 < (T34 + T56 + T67) / T45 < 1.85.

[0138] The focal length of the photographic lens system is f, the focal length of the first lens is f1, and the focal length of the second lens is f2. When the photographic lens system satisfies the following relationship: -1.50 < (f / f1) + (f / f2) < -0.10, it can ensure the balance of the refractive power distribution of the first lens and the second lens in the system to avoid serious aberrations caused by excessive refractive power.

[0139] The distance on the optical axis between the fourth lens and the fifth lens is T45, and the distance on the optical axis between the fifth lens and the sixth lens is T56. When the photographic lens system satisfies the following relational expression: 1.10 < T45 / T56 < 2.0, the lens spacings among the fourth lens, the fifth lens, and the sixth lens can be balanced, which is conducive to lens assembly and reduces the system sensitivity.

[0140] The distance on the optical axis between the object side surface of the first lens and the imaging surface is TL, and the entrance pupil diameter of the photographic lens system is EPD. When the photographic lens system satisfies the following relational expression: 1.50 < TL / EPD < 4.0, it can simultaneously meet the requirements of a short overall length and a large aperture, enabling sufficient bright images to be captured within a limited lens space.

[0141] The focal length of the photographic lens system is f, and the entrance pupil diameter of the photographic lens system is EPD. When the photographic lens system satisfies the following relational expression: 1.0 < f / EPD < 2.0, the light entrance aperture of the lens can be effectively adjusted, and the light input amount of the system can be controlled to enhance the image brightness.

[0142] The focal length of the second lens is f2, and the distance on the optical axis between the object side surface of the first lens and the imaging surface is TL. When the photographic lens system satisfies the following relational expression: f2 / TL < -0.70, the aberration correction ability of the second lens can balance the overall length of the system to meet market demands. It can also satisfy -45.0 < f2 / TL < -1.0.

[0143] The focal length of the photographic lens system is f, the focal length of the first lens is f1, the focal length of the second lens is f2, the focal length of the third lens is f3, the focal length of the fourth lens is f4, the focal length of the fifth lens is f5, the focal length of the sixth lens is f6, and the focal length of the seventh lens is f7. Among |f / f1|, |f / f2|, |f / f3|, |f / f4|, |f / f5|, |f / f6|, and |f / f7|, the smallest one is |f / fi|min. When the photographic lens system satisfies the following relational expression: |f / fi|min < 0.15, there is at least one correction lens in the system, which is conducive to correcting off-axis system aberrations. It can also satisfy |f / fi|min < 0.065.

[0144] The radius of curvature of the object side surface of the fifth lens is R5, and the radius of curvature of the image side surface of the fifth lens is R6. When the photographic lens system satisfies the following relational expression: -1.0 < (R5 + R6) / (R5 - R6) < 0, the shape of the third lens can be balanced, which is conducive to correcting the aberrations generated by the first lens and the second lens, thereby improving the image quality.

[0145] The distance on the optical axis between the object side of the first lens and the image side of the seventh lens is TD, and the distance on the optical axis between the aperture and the image side of the seventh lens is SD. When the photographic lens system satisfies the following relationship: 0.60 < SD / TD < 0.88, the aperture position can be effectively balanced to facilitate the control of the lens volume.

[0146] Half of the maximum viewing angle HFOV in the photographic lens system. When the photographic lens system satisfies the following relationship: 43.0 degrees < HFOV < 70.0 degrees, the system viewing angle can be expanded to meet various different application fields.

[0147] The distance on the optical axis between the fifth lens and the sixth lens is T56, and the distance on the optical axis between the sixth lens and the seventh lens is T67. When the photographic lens system satisfies the following relationship: 0 < T67 / T56 < 0.90, the interval distance between the sixth lens and the seventh lens can be effectively reduced to balance the total lens length. It can also satisfy 0 < T67 / T56 < 0.50.

[0148] The radius of curvature of the image side of the fourth lens is R8, and the radius of curvature of the object side of the seventh lens is R13. When the photographic lens system satisfies the following relationship: 0.40 < R8 / R13, the surface shapes of the fourth lens and the seventh lens can be controlled to balance aberrations with each other. It can also satisfy 0.50 < R8 / R13 < 4.0.

[0149] The Abbe number of the second lens is V2, and the Abbe number of the fourth lens is V4. When the photographic lens system satisfies the following relationship: 0.10 < V4 / V2 < 0.50, the control capabilities of different wavelength light between the second lens and the fourth lens can be balanced to correct chromatic aberration.

[0150] The distance on the optical axis between the image side of the seventh lens and the imaging surface is BL, and the entrance pupil diameter of the photographic lens system is EPD. When the photographic lens system satisfies the following relationship: 0.20 < BL / EPD < 1.0, the back focal length of the system can be effectively compressed while maintaining the size of the entrance light aperture, so that the system can provide sufficient image brightness within a limited space.

[0151] The distance on the optical axis between the third lens and the fourth lens is T34, and the distance on the optical axis between the fourth lens and the fifth lens is T45. When the photographic lens system satisfies the following relationship: 0.03 < T34 / T45 < 1.0, the lens interval distance in the middle section of the system can be balanced to avoid wasting the space inside the lens and being unable to reduce the lens volume.

[0152] The Abbe number of the first lens is V1, the Abbe number of the second lens is V2, the Abbe number of the third lens is V3, the Abbe number of the fourth lens is V4, the Abbe number of the fifth lens is V5, the Abbe number of the sixth lens is V6, and the Abbe number of the seventh lens is V7. The refractive index of the first lens is N1, the refractive index of the second lens is N2, the refractive index of the third lens is N3, the refractive index of the fourth lens is N4, the refractive index of the fifth lens is N5, the refractive index of the sixth lens is N6, and the refractive index of the seventh lens is N7. Among V1 / N1, V2 / N2, V3 / N3, V4 / N4, V5 / N5, V6 / N6, and V7 / N7, the smallest is (Vi / Ni)min. When the photographic lens system satisfies the following relationship: 5.0 < (Vi / Ni)min < 11.8, it helps to strengthen chromatic aberration correction.

[0153] The focal length of the photographic lens system is f, and the focal length of the fifth lens is f5. When the photographic lens system satisfies the following relationship: -0.55 < f / f5 < 0.50, the fifth lens can balance the aberrations generated by adjacent lenses.

[0154] The focal length of the photographic lens system is f, and the radius of curvature of the image side surface of the fifth lens is R10. When the photographic lens system satisfies the following relationship: 0.50 < f / R10 < 5.0, it can assist the system in shortening the back focal length to meet the requirements of miniaturization. It can also meet 1.10 < f / R10 < 5.0.

[0155] The distance between the object side surface of the first lens and the imaging surface on the optical axis is TL, the focal length of the photographic lens system is f, the maximum image height of the photographic lens system is ImgH, and the entrance pupil diameter of the photographic lens system is EPD. When the photographic lens system satisfies the following relationship: 1.50 < (TL × f) / (ImgH × EPD) < 4.30, it can simultaneously meet the requirements of miniaturization and high light input. It can also meet 1.80 < (TL × f) / (ImgH × EPD) < 3.50.

[0156] Among the critical points of the image side surface of the fifth lens at the off-axis position, the perpendicular distance from the critical point closest to the optical axis to the optical axis is Yc52, and the central thickness of the fifth lens on the optical axis is CT5. When the photographic lens system satisfies the following relationship: 0.10 < Yc52 / CT5 < 10.0, it is beneficial to correct field curvature and improve the imaging quality of peripheral images.

[0157] The focal length of the photographic lens system is f, the focal length of the third lens is f3, and the focal length of the sixth lens is f6. When the photographic lens system satisfies the following relationship: 2.0 < (f / f3) + (f / f6) < 5.0, it can provide the system with sufficient converging ability to meet the appropriate specification requirements within a limited space.

[0158] The Abbe number of the fifth lens is V5. When the photographic lens system satisfies the following relationship: 10.0 < V5 < 35.0, it can provide better chromatic aberration balance ability for the fifth lens to avoid the imaging position shift of light rays in different wavelength bands.

[0159] The focal length of the photographic lens system is f, and the maximum image height of the photographic lens system is ImgH. When the photographic lens system satisfies the following relationship: 0.45 < f / ImgH < 1.05, it can capture a wider range of images to receive richer image information.

[0160] Each of the above technical features in the photographic lens system of the present invention can be combined and configured to achieve the corresponding effects.

[0161] In the photographic lens system of the embodiment of the present invention, the material of the lens can be glass or plastic. If the material of the lens is glass, it can increase the freedom of refractive power configuration of the photographic lens system, and the glass lens can be made by techniques such as grinding or molding. If the lens material is plastic, the production cost can be effectively reduced. In addition, an aspherical surface (ASP) can be set on the lens surface, so as to obtain more control variables, reduce aberration, reduce the number of lenses, and effectively reduce the total length of the photographic lens system of the present invention. The aspherical surface can be made by methods such as plastic injection molding or molding glass lenses.

[0162] In the photographic lens system of the embodiment of the present invention, additives can be selectively added to any of the above lens materials to change the transmittance of the lens for light rays in a specific wavelength band, thereby reducing stray light and color deviation. For example: the additive can have the function of filtering light rays in the 600nm - 800nm wavelength band in the system to reduce excess red light or infrared light; or it can filter light rays in the 350nm - 450nm wavelength band to reduce blue light or ultraviolet light in the system. Therefore, the additive can avoid the interference of light rays in a specific wavelength band on imaging. In addition, the additive can be uniformly mixed in the plastic and made into a lens by injection molding technology.

[0163] In the photographic lens system of the embodiment of the present invention, if the lens surface is an aspherical surface, it means that the entire or a part of the optical effective area of the lens surface is an aspherical surface.

[0164] In the photographic lens system of the embodiment of the present invention, if the lens surface is convex and the convex surface position is not defined, it means that the lens surface can be convex near the optical axis; if the lens surface is concave and the concave surface position is not defined, it means that the lens surface can be concave near the optical axis. If the refractive power or focal length of the lens is not defined in its regional position, it means that the refractive power or focal length of the lens can be the refractive power or focal length of the lens near the optical axis.

[0165] In the photographic lens system of this invention, the inflection point is defined as the point where the center of curvature of the curve from the optical axis to the lens surface around the lens transitions from the object side to the image side (or from the image side to the object side). The critical point of the lens surface refers to the point of tangency on the tangent line between the plane perpendicular to the optical axis and the lens surface, and the critical point is not located on the optical axis.

[0166] In the photographic lens system of this invention, the imaging surface of the photographic lens system can be a plane or a curved surface with any curvature, depending on the corresponding electronic photosensitive element, particularly a curved surface with a concave surface facing the object side. Furthermore, in the photographic lens system of this invention, one or more imaging correction elements (such as planar elements) can be selectively arranged between the lens closest to the imaging surface and the imaging surface to achieve the effect of correcting image curvature (e.g., distortion). The optical properties of this imaging correction element, such as curvature, thickness, refractive index, position, and surface shape (convex or concave, spherical or aspherical, diffractive surface, and Fresnel surface, etc.), can be adjusted according to the requirements of the photographic lens system. Generally, a preferred imaging correction element configuration is a thin plano-concave element with a concave surface facing the object side positioned close to the imaging surface.

[0167] In the photographic lens system of this invention, at least one stop can be provided, such as an aperture stop, glare stop, or field stop, which helps to reduce stray light and improve image quality.

[0168] In the photographic lens system of this invention, the aperture configuration can be front-mounted or center-mounted. A front-mounted aperture means that the aperture is set between the subject and the first lens, while a center-mounted aperture means that the aperture is set between the first lens and the imaging plane. A front-mounted aperture can create a longer distance between the exit pupil of the photographic lens system and the imaging plane, giving it a telecentric effect, which can increase the efficiency of electronic image sensors such as CCD or CMOS in receiving images. A center-mounted aperture helps to expand the field of view of the lens, giving the photographic lens system the advantages of a wide-angle lens.

[0169] In embodiments of the present invention, a variable aperture element may be appropriately provided. This variable aperture element can be a mechanical component or a light-regulating element, and its size and shape can be controlled electrically or by electrical signals. The mechanical component may include movable parts such as a blade assembly or a shielding plate; the light-regulating element may include a filter element, an electrochromic material, a liquid crystal layer, or other masking materials. This variable aperture element can enhance the image adjustment capability by controlling the amount of light entering the image or the exposure time. Furthermore, this variable aperture element can also be the aperture of the present invention, and the image quality, such as depth of field or exposure speed, can be adjusted by changing the F-value.

[0170] The photographic lens system of this invention can also be applied in various electronic devices such as three-dimensional (3D) image capture, digital cameras, mobile products, digital tablets, smart TVs, network monitoring equipment, motion-sensing game consoles, dashcams, reversing cameras, wearable products, and drones.

[0171] This invention provides an image-capturing device, comprising the aforementioned photographic lens system and an electronic photosensitive element, wherein the electronic photosensitive element is disposed on an imaging surface of the photographic lens system. By reducing the effective optical radius of the first lens in the photographic lens system through surface configuration, the overall volume of the photographic lens system can be reduced, thereby achieving miniaturization of the photographic lens system. Preferably, the image-capturing device may further include a barrel member, a holder member, or a combination thereof.

[0172] This invention provides an electronic device including the aforementioned image-capturing device. The image-capturing device includes a photographic lens system and an electronic photosensitive element, wherein the electronic photosensitive element is disposed on the imaging surface of the photographic lens system. Preferably, the electronic device may further include a control unit, a display unit, a storage unit, a temporary storage unit (RAM), or a combination thereof.

[0173] The photographic lens system and image capturing device of the present invention will be described in detail below with reference to the accompanying drawings.

[0174] First Embodiment

[0175] First embodiment of the present invention, for example Figure 1A As shown, the aberration curve of the first embodiment is as follows: Figure 1B As shown. The imaging device of the first embodiment includes a photographic lens system (not otherwise labeled) and an electronic photosensitive element 195. The photographic lens system includes, from the object side to the image side, a first lens 110, a second lens 120, an aperture 100, a third lens 130, a fourth lens 140, a fifth lens 150, a sixth lens 160, a seventh lens 170, and an imaging surface 190. The electronic photosensitive element 195 is disposed on the imaging surface 190 of the photographic lens system. The photographic lens system includes seven lenses (110, 120, 130, 140, 150, 160, 170), and there are no other interposed lenses between the seven lenses.

[0176] The first lens 110 has negative refractive power and is made of plastic. Its object side 111 is concave near the optical axis, and its image side 112 is concave near the optical axis. Both the object side 111 and the image side 112 are aspherical.

[0177] The second lens 120 has negative refractive power and is made of plastic. Its object side 121 is convex near the optical axis and its image side 122 is concave near the optical axis. Both its object side 121 and image side 122 are aspherical.

[0178] The third lens 130 has positive refractive power and is made of plastic. Its object side 131 is convex near the optical axis, and its image side 132 is convex near the optical axis. Both the object side 131 and the image side 132 are aspherical.

[0179] The fourth lens 140 has negative refractive power and is made of plastic. Its object side 141 is convex near the optical axis, and its image side 142 is concave near the optical axis. Both the object side 141 and the image side 142 are aspherical.

[0180] The fifth lens 150 has negative refractive power and is made of plastic. Its object side 151 is convex near the optical axis, and its image side 152 is concave near the optical axis and has at least one critical point off the axis. Both its object side 151 and image side 152 are aspherical.

[0181] The sixth lens 160 has positive refractive power and is made of plastic. Its object side 161 is concave near the optical axis and has at least one inflection point off the axis. Its image side 162 is convex near the optical axis and has at least one inflection point off the axis. Both its object side 161 and image side 162 are aspherical.

[0182] The seventh lens 170 has negative refractive power and is made of plastic. Its object side 171 is convex near the optical axis, and its image side 172 is concave near the optical axis and has at least one inflection point off the axis. Both its object side 171 and image side 172 are aspherical.

[0183] The filter element 180 is disposed between the seventh lens 170 and the imaging surface 190, and its material is glass and does not affect the focal length.

[0184] The schematic diagram of parameter Yc52 in the first embodiment of the present invention as an example is shown below. Figure 10 As shown, Yc52 is the perpendicular distance between the critical point closest to the optical axis and the optical axis among the critical points on the image side 152 of the fifth lens 150 that is off-axis.

[0185] Detailed optical data for the first embodiment are shown in Table 1. The units for radius of curvature, thickness, and focal length are millimeters. f represents the focal length, Fno represents the aperture value, HFOV represents half of the maximum angle of view, and surfaces 0-18 sequentially represent surfaces from the object side to the image side. The aspherical data are shown in Table 2. k represents the cone coefficient in the aspherical curve equation, and A4-A18 represent the 4th-18th order aspherical coefficients of each surface. Furthermore, the tables for the following embodiments are corresponding schematic diagrams and aberration curves for each embodiment. The definitions of the data in the tables are the same as those in Tables 1 and 2 of the first embodiment, and will not be repeated here.

[0186] Table 1 Optical data of the first embodiment

[0187]

[0188]

[0189] Table 2 Aspheric coefficients of the first embodiment

[0190] surface# 1 2 3 4 6 7 8 k＝ -1.7758E+01 -2.4216E+01 -1.1069E+00 -1.3408E+01 -7.4247E+00 -4.7573E+00 -1.0000E+00 A4＝ 3.8051E-02 1.0705E-01 -5.4969E-02 -4.1742E-01 -7.7952E-03 1.2660E-01 9.1650E-02 A6＝ -5.0154E-02 -5.5278E-02 2.1959E-01 7.8607E-01 4.6348E-02 -4.6198E-01 -5.4845E-01 A8＝ 1.2106E-02 -5.9751E-02 -5.3384E-01 -1.2938E+00 -1.8767E-01 5.1679E-01 5.2721E-01 A10＝ -2.2566E-03 4.9739E-02 4.5116E-01 1.1254E+00 1.4193E-01 -2.7822E-01 5.4981E-03 A12＝ 8.3135E-03 8.3790E-03 -1.2862E-01 -3.8894E-01 -3.5106E-02 5.2549E-02 -2.0575E-01 A14＝ -4.8379E-03 6.7727E-02 A16＝ 7.7744E-04 surface# 9 10 11 12 13 14 15 k＝ 1.7168E+00 -8.9998E+01 -3.2699E+01 5.9775E+00 -5.9758E+00 -1.7256E-01 -4.0620E+00 A4＝ -1.1615E-02 -1.6661E-01 -9.8217E-02 -1.5034E-01 -4.8448E-01 1.1381E-01 1.3549E-02 A6＝ -2.2859E-01 -6.8981E-02 5.5284E-02 1.1688E+00 1.1977E+00 -4.7386E-01 -1.1048E-01 A8＝ 2.3746E-01 2.8714E-01 -1.3699E-01 -2.5360E+00 -1.9403E+00 4.3947E-01 8.8806E-02 A10＝ -7.7534E-02 -2.6520E-01 6.0469E-02 2.8492E+00 1.9216E+00 -2.2622E-01 -3.7172E-02 A12＝ -1.5517E-03 1.3843E-01 7.3638E-02 -1.8075E+00 -1.1076E+00 7.0094E-02 9.1309E-03 A14＝ -3.1524E-02 -6.3203E-02 6.5176E-01 3.6998E-01 -1.2927E-02 -1.3259E-03 A16＝ 1.3341E-02 -1.2251E-01 -6.7302E-02 1.3086E-03 1.0541E-04 A18＝ 8.8212E-03 5.2004E-03 -5.6195E-05 -3.5353E-06

[0191] The equation for the aforementioned aspherical curve is expressed as follows:

[0192]

[0193] in,

[0194] X: The distance between a point on the aspherical surface at a distance Y from the optical axis and the tangent plane at the vertex on the optical axis of the aspherical surface;

[0195] Y: The perpendicular distance between a point on the aspherical curve and the optical axis;

[0196] R: Radius of curvature;

[0197] k: Conical coefficient;

[0198] Ai: The i-th order aspherical coefficient.

[0199] In the first embodiment, the focal length of the photographic lens system is f, the aperture value of the photographic lens system is Fno, and half of the maximum field of view of the photographic lens system is HFOV, with the values: f = 2.56 (mm), Fno = 1.76, and HFOV = 51.7 (degrees).

[0200] In the first embodiment, the Abbe number of the fifth lens 150 is V5, and its value is: V5 = 30.2.

[0201] In the first embodiment, the smallest Abbe number among the seven lenses is Vmin, and its value is: Vmin = 19.5 (the smallest Abbe number is the fourth lens 140).

[0202] The Abbe number of the second lens 120 is V2, and the Abbe number of the fourth lens 140 is V4, which satisfy the relationship: V4 / V2=0.35.

[0203] In the first embodiment, the Abbe number of the first lens 110 is V1, the Abbe number of the second lens 120 is V2, the Abbe number of the third lens 130 is V3, the Abbe number of the fourth lens 140 is V4, the Abbe number of the fifth lens 150 is V5, the Abbe number of the sixth lens 160 is V6, and the Abbe number of the seventh lens 170 is V7. The refractive index of the first lens 110 is N1, the refractive index of the second lens 120 is N2, the refractive index of the third lens 130 is N3, the refractive index of the fourth lens 140 is N4, the refractive index of the fifth lens 150 is N5, the refractive index of the sixth lens 160 is N6, and the refractive index of the seventh lens 170 is N7. The smallest of V1 / N1, V2 / N2, V3 / N3, V4 / N4, V5 / N5, V6 / N6, and V7 / N7 is (Vi / Ni)min, which satisfies the relationship: (Vi / Ni)min = 11.67.

[0204] In the first embodiment, the total distance between any two adjacent lenses in the photographic lens system on the optical axis is ΣAT, and the total thickness of each lens in the photographic lens system on the optical axis is ΣCT, which satisfies the relationship: ΣAT / ΣCT=0.38.

[0205] In the first embodiment, the distance between the third lens 130 and the fourth lens 140 on the optical axis is T34, and the distance between the fourth lens 140 and the fifth lens 150 on the optical axis is T45, which satisfies the relationship: T34 / T45=0.35.

[0206] In the first embodiment, the distance between the fourth lens 140 and the fifth lens 150 on the optical axis is T45, and the distance between the fifth lens 150 and the sixth lens 160 on the optical axis is T56, which satisfies the relationship: T45 / T56=1.78.

[0207] In the first embodiment, the distance on the optical axis between the sixth lens 160 and the seventh lens 170 is T67, and the distance on the optical axis between the fifth lens 150 and the sixth lens 160 is T56, which satisfies the relationship: T67 / T56=0.26.

[0208] In the first embodiment, the distance on the optical axis between the third lens 130 and the fourth lens 140 is T34, the distance on the optical axis between the fifth lens 150 and the sixth lens 160 is T56, and the distance on the optical axis between the sixth lens 160 and the seventh lens 170 is T67, which satisfies the relationship: (T34+T56+T67) / T45=1.06.

[0209] In the first embodiment, the focal length of the photographic lens system is f, and the radius of curvature of the image side of the fourth lens is R8, which satisfies the relationship: f / R8=1.10.

[0210] In the first embodiment, the focal length of the photographic lens system is f, and the radius of curvature of the image side of the fifth lens is R10, which satisfies the relationship: f / R10=1.54.

[0211] In the first embodiment, the radius of curvature of the image side 142 of the fourth lens 140 is R8, and the radius of curvature of the object side 171 of the seventh lens 170 is R13, which satisfies the relationship: R8 / R13=1.09.

[0212] In the first embodiment, the radius of curvature of the object side 131 of the third lens 130 is R5, and the radius of curvature of the image side 132 of the third lens 130 is R6, which satisfies the relationship: (R5+R6) / (R5-R6)=-0.39.

[0213] In the first embodiment, the focal length of the photographic lens system is f, and the focal length of the fifth lens 150 is f5, which satisfies the relationship: f / f5=-0.34.

[0214] In the first embodiment, the focal length of the second lens 120 is f2, and the distance TL between the object side 111 of the first lens 110 and the imaging surface 190 on the optical axis satisfies the relationship: f2 / TL=-3.82.

[0215] In the first embodiment, the focal length of the photographic lens system is f, the focal length of the first lens 110 is f1, and the focal length of the second lens 120 is f2, which satisfy the relationship: (f / f1)+(f / f2)=-0.46.

[0216] In the first embodiment, the focal length of the photographic lens system is f, the focal length of the third lens 130 is f3, and the focal length of the sixth lens 160 is f6, which satisfy the relationship: (f / f3)+(f / f6)=2.91.

[0217] In the first embodiment, the focal length of the photographic lens system is f, the focal length of the first lens 110 is f1, the focal length of the second lens 120 is f2, the focal length of the third lens 130 is f3, the focal length of the fourth lens 140 is f4, the focal length of the fifth lens 150 is f5, the focal length of the sixth lens 160 is f6, and the focal length of the seventh lens 170 is f7. The smallest of |f / f1|, |f / f2|, |f / f3|, |f / f4|, |f / f5|, |f / f6|, and |f / f7| is |f / fi|min, which satisfies the relationship: |f / fi|min=0.13.

[0218] In the first embodiment, the focal length of the photographic lens system is f, and the entrance pupil diameter of the photographic lens system is EPD, which satisfies the relationship: f / EPD=1.76.

[0219] In the first embodiment, the distance on the optical axis between the object side 111 of the first lens 110 and the imaging surface 190 is TL, and the focal length of the photographic lens system is f, which satisfies the relationship: TL / f = 2.03.

[0220] In the first embodiment, the distance on the optical axis between the object side 111 of the first lens 110 and the imaging surface 190 is TL, and the maximum image height of the photographic lens system is ImgH, which satisfies the relationship: TL / ImgH=1.65.

[0221] In the first embodiment, the distance on the optical axis between the object side 111 of the first lens 110 and the imaging surface 190 is TL, and the entrance pupil diameter of the photographic lens system is EPD, which satisfies the relationship: TL / EPD=3.57.

[0222] In the first embodiment, the focal length of the photographic lens system is f, and the maximum image height of the photographic lens system is ImgH, which satisfies the relationship: f / ImgH=0.81.

[0223] In the first embodiment, the distance on the optical axis between the aperture and the image side 172 of the seventh lens 170 is SD, and the distance on the optical axis between the object side 111 of the first lens 110 and the image side 172 of the seventh lens 170 is TD, which satisfies the relationship: SD / TD = 0.76.

[0224] In the first embodiment, the distance on the optical axis between the image side 172 of the seventh lens 170 and the imaging surface 190 is BL, and the entrance pupil diameter of the photographic lens system is EPD, which satisfies the relationship: BL / EPD=0.79.

[0225] In the first embodiment, the vertical distance between the critical point closest to the optical axis and the critical point on the image side 152 of the fifth lens 150 at the off-axis is Yc52, and the center thickness of the fifth lens 150 on the optical axis is CT5, which satisfies the relationship: Yc52 / CT5=3.52.

[0226] In the first embodiment, the distance on the optical axis between the object side 111 of the first lens 110 and the imaging surface 190 is TL, the focal length of the photographic lens system is f, the maximum image height of the photographic lens system is ImgH, and the entrance pupil diameter of the photographic lens system is EPD, which satisfies the relationship: (TL×f) / (ImgH×EPD)=2.90.

[0227] Second Embodiment

[0228] Second embodiment of the present invention, for example Figure 2AAs shown, the aberration curve of the second embodiment is as follows: Figure 2B As shown. The imaging device of the second embodiment includes a photographic lens system (not otherwise labeled) and an electronic photosensitive element 295. The photographic lens system includes, from the object side to the image side, a first lens 210, a second lens 220, an aperture 200, a third lens 230, a fourth lens 240, a fifth lens 250, a sixth lens 260, a seventh lens 270, and an imaging surface 290. The electronic photosensitive element 295 is disposed on the imaging surface 290 of the photographic lens system. The photographic lens system includes seven lenses (210, 220, 230, 240, 250, 260, 270), and there are no other interposed lenses between the seven lenses.

[0229] The first lens 210 has negative refractive power and is made of plastic. Its object side 211 is convex near the optical axis and has at least one inflection point off the axis. Its image side 212 is concave near the optical axis. Both the object side 211 and the image side 212 are aspherical.

[0230] The second lens 220 has negative refractive power and is made of plastic. Its object side 221 is convex near the optical axis, and its image side 222 is concave near the optical axis. Both its object side 221 and image side 222 are aspherical.

[0231] The third lens 230 has positive refractive power and is made of plastic. Its object side 231 is convex near the optical axis, and its image side 232 is convex near the optical axis. Both the object side 231 and the image side 232 are aspherical.

[0232] The fourth lens 240 has negative refractive power and is made of plastic. Its object side 241 is concave near the optical axis, and its image side 242 is concave near the optical axis. Both the object side 241 and the image side 242 are aspherical.

[0233] The fifth lens 250 has negative refractive power and is made of plastic. Its object side 251 is convex near the optical axis, and its image side 252 is concave near the optical axis and has at least one critical point off the axis. Both its object side 251 and image side 252 are aspherical.

[0234] The sixth lens 260 has positive refractive power and is made of plastic. Its object side 261 is concave near the optical axis and has at least one inflection point off the axis. Its image side 262 is convex near the optical axis and has at least one inflection point off the axis. Both its object side 261 and image side 262 are aspherical.

[0235] The seventh lens 270 has negative refractive power and is made of plastic. Its object side 271 is convex near the optical axis, and its image side 272 is concave near the optical axis and has at least one inflection point off the axis. Both its object side 271 and image side 272 are aspherical.

[0236] The filter element 280 is disposed between the seventh lens 270 and the imaging surface 290. It is made of glass and does not affect the focal length.

[0237] The detailed optical data of the second embodiment are shown in Table 3, and its aspherical data are shown in Table 4.

[0238] Table 3 Optical data of the second embodiment

[0239]

[0240] Table 4 Aspheric coefficients of the second embodiment

[0241]

[0242]

[0243] The equations for the aspherical curves in the second embodiment are expressed in the same form as in the first embodiment. Furthermore, the parameters of each relation are as explained in the first embodiment, except that the numerical values ​​of each relation are listed in Table 5 below.

[0244] Table 5. Values ​​of various relational expressions in the second embodiment.

[0245] f[mm] 2.50 (R5+R6) / (R5-R6) -0.22 Fno. 1.76 f / f5 -0.32 HFOV [deg.] 52.1 f2 / TL -3.49 V5 30.2 (f / f1)+(f / f2) -0.48 Vmin 19.5 (f / f3)+(f / f6) 2.94 V4 / V2 0.35 |f / fi|min 0.13 (Vi / Ni)min 11.67 f / EPD 1.76 ΣAT / ΣCT 0.50 TL / f 2.22 T34 / T45 0.41 TL / ImgH 1.75 T45 / T56 1.38 TL / EPD 3.91 T67 / T56 0.20 f / ImgH 0.79 (T34+T56+T67) / T45 1.28 SD / TD 0.73 f / R8 1.02 BL / EPD 0.78 f / R10 1.59 Yc52 / CT5 2.70 R8 / R13 1.16 (TL×f) / (ImgH×EPD) 3.07

[0246] Third Embodiment

[0247] Third embodiment of the present invention, for example Figure 3A As shown, the aberration curve of the third embodiment is as follows: Figure 3B As shown. The imaging device of the third embodiment includes a photographic lens system (not otherwise labeled) and an electronic photosensitive element 395. The photographic lens system includes, from the object side to the image side, a first lens 310, a second lens 320, an aperture 300, a third lens 330, a fourth lens 340, a fifth lens 350, a sixth lens 360, a seventh lens 370, and an imaging surface 390. The electronic photosensitive element 395 is disposed on the imaging surface 390 of the photographic lens system. The photographic lens system includes seven lenses (310, 320, 330, 340, 350, 360, 370), and there are no other interposed lenses between the seven lenses.

[0248] The first lens 310 has negative refractive power and is made of plastic. Its object side 311 is convex near the optical axis and has at least one inflection point off the axis. Its image side 312 is concave near the optical axis. Both the object side 311 and the image side 312 are aspherical.

[0249] The second lens 320 has negative refractive power and is made of plastic. Its object side 321 is concave near the optical axis, and its image side 322 is concave near the optical axis. Both the object side 321 and the image side 322 are aspherical.

[0250] The third lens 330 has positive refractive power and is made of plastic. Its object side 331 is convex near the optical axis, and its image side 332 is convex near the optical axis. Both its object side 331 and image side 332 are aspherical.

[0251] The fourth lens 340 has negative refractive power and is made of plastic. Its object side 341 is convex near the optical axis, and its image side 342 is concave near the optical axis. Both its object side 341 and image side 342 are aspherical.

[0252] The fifth lens 350 has positive refractive power and is made of plastic. Its object side 351 is convex near the optical axis, and its image side 352 is concave near the optical axis and has at least one critical point off the axis. Both its object side 351 and image side 352 are aspherical.

[0253] The sixth lens 360 has positive refractive power and is made of plastic. Its object side 361 is concave near the optical axis and has at least one inflection point off the axis. Its image side 362 is convex near the optical axis and has at least one inflection point off the axis. Both its object side 361 and image side 362 are aspherical.

[0254] The seventh lens 370 has negative refractive power and is made of plastic. Its object side 371 is convex near the optical axis, and its image side 372 is concave near the optical axis and has at least one inflection point off the axis. Both its object side 371 and image side 372 are aspherical.

[0255] The filter element 380 is located between the seventh lens 370 and the imaging surface 390. It is made of glass and does not affect the focal length.

[0256] The detailed optical data of the third embodiment are shown in Table 6, and its aspherical data are shown in Table 7.

[0257] Table 6 Optical data of the third embodiment

[0258]

[0259]

[0260] Table 7 Aspheric coefficients of the third embodiment

[0261] surface# 1 2 3 4 6 7 8 k＝ -1.7758E+01 -2.4207E+01 -1.1069E+00 -1.3405E+01 -6.9151E+00 -4.7548E+00 -1.0000E+00 A4＝ 9.2976E-02 2.0309E-01 1.4090E-02 -2.9834E-01 -1.6471E-03 6.3560E-02 3.1097E-02 A6＝ -1.0842E-01 -1.5912E-01 -3.5959E-02 3.9728E-01 6.2605E-02 -1.7191E-01 -2.3759E-01 A8＝ 4.8042E-02 5.1184E-02 -7.0034E-02 -5.6486E-01 -1.8106E-01 6.2940E-02 1.7617E-01 A10＝ -1.5291E-02 -1.1751E-02 8.7508E-02 4.7432E-01 1.6018E-01 4.1568E-02 4.0688E-02 A12＝ 6.9744E-03 7.9586E-03 -2.7532E-02 -1.6310E-01 -5.3491E-02 -3.0820E-02 -7.1402E-02 A14＝ -2.3352E-03 1.4212E-02 A16＝ 2.8706E-04 surface# 9 10 11 12 13 14 15 k＝ 1.3490E+00 -8.9998E+01 -3.2746E+01 1.4333E+00 -4.6203E+00 -1.7416E-01 -3.5272E+00 A4＝ -3.3612E-02 -3.7027E-03 -1.3712E-01 -1.8759E-02 -2.8941E-01 6.6093E-02 -3.9117E-02 A6＝ -1.2000E-01 -1.7133E-01 8.8735E-02 2.7565E-01 6.6958E-01 -3.5941E-01 -4.8931E-02 A8＝ 1.1075E-01 2.5123E-01 -2.4262E-02 -4.2638E-01 -1.1203E+00 3.2763E-01 4.6729E-02 A10＝ -2.9580E-02 -2.5028E-01 -1.8060E-01 2.6023E-01 1.1989E+00 -1.6286E-01 -1.9501E-02 A12＝ 2.1955E-03 1.4960E-01 2.6566E-01 8.2735E-02 -7.3890E-01 4.8140E-02 4.6009E-03 A14＝ -3.7900E-03 -3.4220E-02 -1.3461E-01 -1.7558E-01 2.6022E-01 -8.3827E-03 -6.4072E-04 A16＝ 2.4087E-02 7.7434E-02 -4.9261E-02 7.9453E-04 4.9456E-05 A18＝ -1.1527E-02 3.9110E-03 -3.1721E-05 -1.6342E-06

[0262] The equations for the aspherical curves in the third embodiment are expressed in the same form as in the first embodiment. Furthermore, the parameters of each relation are as explained in the first embodiment, except that the numerical values ​​of each relation are listed in Table 8.

[0263] Table 8. Values ​​of various relations in the third embodiment.

[0264]

[0265]

[0266] Fourth Embodiment

[0267] Fourth embodiment of the present invention, for example Figure 4A As shown, the aberration curve of the fourth embodiment is as follows: Figure 4B As shown. The imaging device of the fourth embodiment includes a photographic lens system (unspecified) and an electronic photosensitive element 495. The photographic lens system includes, from the object side to the image side, a first lens 410, a second lens 420, an aperture 400, a third lens 430, a fourth lens 440, a fifth lens 450, a sixth lens 460, a seventh lens 470, and an imaging surface 490. The electronic photosensitive element 495 is disposed on the imaging surface 490 of the photographic lens system. The photographic lens system includes seven lenses (410, 420, 430, 440, 450, 460, 470), and there are no other interposed lenses between the seven lenses.

[0268] The first lens 410 has negative refractive power and is made of plastic. Its object side 411 is convex near the optical axis and has at least one inflection point off the axis. Its image side 412 is concave near the optical axis. Both the object side 411 and the image side 412 are aspherical.

[0269] The second lens 420 has negative refractive power and is made of plastic. Its object side 421 is concave near the optical axis, and its image side 422 is concave near the optical axis. Both the object side 421 and the image side 422 are aspherical.

[0270] The third lens 430 has positive refractive power and is made of plastic. Its object side 431 is convex near the optical axis, and its image side 432 is convex near the optical axis. Both the object side 431 and the image side 432 are aspherical.

[0271] The fourth lens 440 has negative refractive power and is made of plastic. Its object side 441 is convex near the optical axis, and its image side 442 is concave near the optical axis. Both the object side 441 and the image side 442 are aspherical.

[0272] The fifth lens 450 has positive refractive power and is made of plastic. Its object side 451 is convex near the optical axis, and its image side 452 is concave near the optical axis and has at least one critical point off the axis. Both its object side 451 and image side 452 are aspherical.

[0273] The sixth lens 460 has positive refractive power and is made of plastic. Its object side 461 is concave near the optical axis and has at least one inflection point off the axis. Its image side 462 is convex near the optical axis and has at least one inflection point off the axis. Both its object side 461 and image side 462 are aspherical.

[0274] The seventh lens 470 has negative refractive power and is made of plastic. Its object side 471 is convex near the optical axis, and its image side 472 is concave near the optical axis and has at least one inflection point off the axis. Both its object side 471 and image side 472 are aspherical.

[0275] The filter element 480 is located between the seventh lens 470 and the imaging surface 490. It is made of glass and does not affect the focal length.

[0276] The detailed optical data of the fourth embodiment are shown in Table 9, and its aspherical data are shown in Table 10.

[0277] Table 9 Optical data of the fourth embodiment

[0278]

[0279] Table 10 Aspheric coefficients of the fourth embodiment

[0280]

[0281]

[0282] The equations for the aspherical curves in the fourth embodiment are expressed in the same form as in the first embodiment. Furthermore, the parameters of each relation are as explained in the first embodiment, except that the numerical values ​​of each relation are listed in Table 11.

[0283] Table 11. Values ​​of various relational formulas in the fourth embodiment.

[0284] f[mm] 2.37 (R5+R6) / (R5-R6) -0.43 Fno. 1.65 f / f5 0.00 HFOV [deg.] 54.0 f2 / TL -3.20 V5 56.8 (f / f1)+(f / f2) -0.45 Vmin 17.8 (f / f3)+(f / f6) 2.53 V4 / V2 0.32 |f / fi|min 0.00 (Vi / Ni)min 10.41 f / EPD 1.65 ΣAT / ΣCT 0.52 TL / f 2.35 T34 / T45 0.36 TL / ImgH 1.75 T45 / T56 1.15 TL / EPD 3.88 T67 / T56 0.57 f / ImgH 0.74 (T34+T56+T67) / T45 1.72 SD / TD 0.70 f / R8 1.12 BL / EPD 0.74 f / R10 0.83 Yc52 / CT5 3.73 R8 / R13 1.01 (TL×f) / (ImgH×EPD) 2.88

[0285] Fifth Embodiment

[0286] Fifth embodiment of the present invention Figure 5A As shown, the aberration curve of the fifth embodiment is as follows: Figure 5BAs shown. The imaging device of the fifth embodiment includes a photographic lens system (unlabeled) and an electronic photosensitive element 595. The photographic lens system includes, from the object side to the image side, a first lens 510, a second lens 520, a third lens 530, an aperture 500, a fourth lens 540, a fifth lens 550, a sixth lens 560, a seventh lens 570, and an imaging surface 590. The electronic photosensitive element 595 is disposed on the imaging surface 590 of the photographic lens system. The photographic lens system includes seven lenses (510, 520, 530, 540, 550, 560, 570), and there are no other interposed lenses between the seven lenses.

[0287] The first lens 510 has negative refractive power and is made of plastic. Its object side 511 is concave near the optical axis and has at least one inflection point off the axis. Its image side 512 is convex near the optical axis and has at least one inflection point off the axis. Both the object side 511 and the image side 512 are aspherical.

[0288] The second lens 520 has negative refractive power and is made of plastic. Its object side 521 is convex near the optical axis, and its image side 522 is concave near the optical axis. Both its object side 521 and image side 522 are aspherical.

[0289] The third lens 530 has positive refractive power and is made of plastic. Its object side 531 is convex near the optical axis, and its image side 532 is convex near the optical axis. Both the object side 531 and the image side 532 are aspherical.

[0290] The fourth lens 540 has negative refractive power and is made of plastic. Its object side 541 is convex near the optical axis, and its image side 542 is concave near the optical axis. Both the object side 541 and the image side 542 are aspherical.

[0291] The fifth lens 550 has negative refractive power and is made of plastic. Its object side 551 is convex near the optical axis, and its image side 552 is concave near the optical axis and has at least one critical point off the axis. Both its object side 551 and image side 552 are aspherical.

[0292] The sixth lens 560 has positive refractive power and is made of plastic. Its object side 561 is convex near the optical axis and has at least one inflection point off the axis. Its image side 562 is convex near the optical axis and has at least one inflection point off the axis. Both its object side 561 and image side 562 are aspherical.

[0293] The seventh lens 570 has negative refractive power and is made of plastic. Its object side 571 is convex near the optical axis, and its image side 572 is concave near the optical axis and has at least one inflection point off the axis. Both its object side 571 and image side 572 are aspherical.

[0294] The filter element 580 is located between the seventh lens 570 and the imaging surface 590. It is made of glass and does not affect the focal length.

[0295] The detailed optical data of the fifth embodiment are shown in Table 12, and its aspherical data are shown in Table 13.

[0296] Table 12 Optical data of the fifth embodiment

[0297]

[0298]

[0299] Table 13 Aspheric coefficients of the fifth embodiment

[0300] surface# 1 2 3 4 5 6 8 k＝ -4.4464E+01 -7.7623E+01 -4.6754E+00 -6.8719E+00 -6.9168E+00 -3.9691E+01 -3.8024E+00 A4＝ -1.2469E-02 5.7187E-03 -8.0982E-02 -1.9008E-01 2.4349E-02 -1.0053E-01 -8.4005E-02 A6＝ 2.6575E-02 4.3263E-02 6.7959E-02 1.1105E-01 -6.8251E-02 1.6279E-01 2.2209E-01 A8＝ -1.3336E-02 -3.9427E-02 -9.1745E-02 -4.7914E-02 1.0552E-01 -1.7288E-01 -1.7403E-01 A10＝ 3.5449E-03 2.4102E-02 4.0566E-02 3.4801E-03 -3.8767E-02 1.1770E-01 5.7120E-02 A12＝ -3.4366E-04 -9.6315E-03 -5.1001E-03 3.0385E-03 -6.0249E-03 -4.4887E-02 5.8007E-03 A14＝ 2.0545E-03 -1.1244E-02 surface# 9 10 11 12 13 14 15 k＝ 4.2835E+00 -3.8583E+01 -2.1011E+01 1.4223E+01 -5.5108E+00 4.1697E+01 -4.4125E+00 A4＝ -4.1141E-02 -1.9398E-01 -9.9299E-02 6.8418E-04 -7.9251E-02 -1.1998E-01 -9.9606E-02 A6＝ 3.6396E-02 1.0133E-01 -2.2673E-02 -4.5086E-02 2.4092E-02 -8.5582E-02 3.4494E-02 A8＝ 8.1862E-02 -6.1996E-02 9.9235E-02 -5.6163E-03 -2.2726E-02 9.2781E-02 -7.2752E-03 A10＝ -2.0152E-01 -2.1429E-02 -1.2628E-01 4.0304E-02 1.1979E-02 -3.5283E-02 7.2846E-04 A12＝ 1.7690E-01 5.8689E-02 9.3645E-02 -2.8999E-02 -2.3667E-03 6.9922E-03 -1.1779E-05 A14＝ -6.3541E-02 -2.0708E-02 -3.3429E-02 9.5709E-03 1.1693E-04 -7.1758E-04 -4.2658E-06 A16＝ 4.4341E-03 -1.3093E-03 1.4083E-05 3.0045E-05 2.8678E-07

[0301] The equations for the aspherical curves in the fifth embodiment are expressed in the same form as in the first embodiment. Furthermore, the parameters of each relation are as explained in the first embodiment, except that the values ​​of each relation are listed in Table 14.

[0302] Table 14. Values ​​of various relational formulas in the fifth embodiment.

[0303]

[0304]

[0305] The Sixth Embodiment

[0306] Sixth embodiment of the present invention Figure 6A As shown, the aberration curve of the sixth embodiment is as follows: Figure 6B As shown. The imaging device of the sixth embodiment includes a photographic lens system (unspecified) and an electronic photosensitive element 695. The photographic lens system includes, from the object side to the image side, a first lens 610, a second lens 620, an aperture 600, a third lens 630, a fourth lens 640, a fifth lens 650, a sixth lens 660, a seventh lens 670, and an imaging surface 690. The electronic photosensitive element 695 is disposed on the imaging surface 690 of the photographic lens system. The photographic lens system includes seven lenses (610, 620, 630, 640, 650, 660, and 670), and there are no other interposed lenses between the seven lenses.

[0307] The first lens 610 has negative refractive power and is made of plastic. Its object side 611 is concave near the optical axis and has at least one inflection point off the axis. Its image side 612 is convex near the optical axis and has at least one inflection point off the axis. Both the object side 611 and the image side 612 are aspherical.

[0308] The second lens 620 has negative refractive power and is made of plastic. Its object side 621 is convex near the optical axis, and its image side 622 is concave near the optical axis. Both its object side 621 and image side 622 are aspherical.

[0309] The third lens 630 has positive refractive power and is made of plastic. Its object side 631 is convex near the optical axis, and its image side 632 is convex near the optical axis. Both the object side 631 and the image side 632 are aspherical.

[0310] The fourth lens 640 has negative refractive power and is made of plastic. Its object side 641 is convex near the optical axis, and its image side 642 is concave near the optical axis. Both the object side 641 and the image side 642 are aspherical.

[0311] The fifth lens 650 has negative refractive power and is made of plastic. Its object side 651 is convex near the optical axis, and its image side 652 is concave near the optical axis and has at least one critical point off the axis. Both its object side 651 and image side 652 are aspherical.

[0312] The sixth lens 660 has positive refractive power and is made of plastic. Its object side 661 is concave near the optical axis and has at least one inflection point off the axis. Its image side 662 is convex near the optical axis and has at least one inflection point off the axis. Both its object side 661 and image side 662 are aspherical.

[0313] The seventh lens 670 has negative refractive power and is made of plastic. Its object side 671 is convex near the optical axis, and its image side 672 is concave near the optical axis and has at least one inflection point off the axis. Both its object side 671 and image side 672 are aspherical.

[0314] The filter element 680 is located between the seventh lens 670 and the imaging surface 690. It is made of glass and does not affect the focal length.

[0315] The detailed optical data of the sixth embodiment are shown in Table 15, and its aspherical data are shown in Table 16.

[0316] Table 15 Optical data of the sixth embodiment

[0317]

[0318] Table 16 Aspheric coefficients of the sixth embodiment

[0319]

[0320]

[0321] The equations for the aspherical curves in the sixth embodiment are expressed in the same form as in the first embodiment. Furthermore, the parameters of each relation are as explained in the first embodiment, except that the numerical values ​​of each relation are listed in Table 17.

[0322] Table 17. Values ​​of various relational formulas in the sixth embodiment.

[0323] f[mm] 3.02 (R5+R6) / (R5-R6) -0.32 Fno. 1.88 f / f5 -0.15 HFOV [deg.] 47.3 f2 / TL -22.35 V5 20.3 (f / f1)+(f / f2) -0.06 Vmin 19.5 (f / f3)+(f / f6) 2.36 V4 / V2 0.35 |f / fi|min 0.03 (Vi / Ni)min 11.67 f / EPD 1.88 ΣAT / ΣCT 0.37 TL / f 1.79 T34 / T45 0.43 TL / ImgH 1.69 T45 / T56 1.39 TL / EPD 3.36 T67 / T56 0.22 f / ImgH 0.94 (T34+T56+T67) / T45 1.31 SD / TD 0.76 f / R8 1.02 BL / EPD 0.69 f / R10 1.15 Yc52 / CT5 4.27 R8 / R13 1.17 (TL×f) / (ImgH×EPD) 3.18

[0324] Seventh Embodiment

[0325] Seventh embodiment of the present invention, for example Figure 7A As shown, the aberration curve of the seventh embodiment is as follows: Figure 7B As shown. The imaging device of the seventh embodiment includes an imaging lens system (unspecified) and an electronic photosensitive element 795. The imaging lens system includes, from the object side to the image side, a first lens 710, a second lens 720, an aperture 700, a third lens 730, a fourth lens 740, a fifth lens 750, a sixth lens 760, a seventh lens 770, and an imaging surface 790. The electronic photosensitive element 795 is disposed on the imaging surface 790. The imaging lens system includes seven lenses (710, 720, 730, 740, 750, 760, and 770), and there are no other interposed lenses between the seven lenses.

[0326] The first lens 710 has negative refractive power and is made of plastic. Its object side 711 is concave near the optical axis and has at least one inflection point off the axis. Its image side 712 is convex near the optical axis and has at least one inflection point off the axis. Both the object side 711 and the image side 712 are aspherical.

[0327] The second lens 720 has negative refractive power and is made of plastic. Its object side 721 is convex near the optical axis, and its image side 722 is concave near the optical axis. Both the object side 721 and the image side 722 are aspherical.

[0328] The third lens 730 has positive refractive power and is made of plastic. Its object side 731 is convex near the optical axis, and its image side 732 is convex near the optical axis. Both the object side 731 and the image side 732 are aspherical.

[0329] The fourth lens 740 has negative refractive power and is made of plastic. Its object side 741 is convex near the optical axis, and its image side 742 is concave near the optical axis. Both the object side 741 and the image side 742 are aspherical.

[0330] The fifth lens 750 has negative refractive power and is made of plastic. Its object side 751 is convex near the optical axis, and its image side 752 is concave near the optical axis and has at least one critical point off the axis. Both its object side 751 and image side 752 are aspherical.

[0331] The sixth lens 760 has positive refractive power and is made of plastic. Its object side 761 is concave near the optical axis and has at least one inflection point off the axis. Its image side 762 is convex near the optical axis and has at least one inflection point off the axis. Both the object side 761 and the image side 762 are aspherical.

[0332] The seventh lens 770 has negative refractive power and is made of plastic. Its object side 771 is convex near the optical axis, and its image side 772 is concave near the optical axis and has at least one inflection point off the axis. Both its object side 771 and image side 772 are aspherical.

[0333] The filter element 780 is located between the seventh lens 770 and the imaging surface 790. It is made of glass and does not affect the focal length.

[0334] The detailed optical data of the seventh embodiment are shown in Table 18, and its aspherical data are shown in Table 19.

[0335] Table 18 Optical Data of the Seventh Embodiment

[0336]

[0337]

[0338] Table 19 Aspheric coefficients of the seventh embodiment

[0339] surface# 1 2 3 4 6 7 8 k＝ -1.7760E+01 -2.4218E+01 -1.1063E+00 -1.3401E+01 -7.4247E+00 -4.7653E+00 -1.0000E+00 A4＝ -1.2084E-01 2.9437E-02 -1.0542E-01 -2.9504E-01 -2.3384E-02 8.5924E-02 6.0906E-02 A6＝ 2.7848E-01 4.0626E-02 1.3159E-01 4.2570E-01 -2.0650E-02 -4.4478E-01 -4.9693E-01 A8＝ -3.9766E-01 -1.1250E-01 -2.0786E-01 -5.6507E-01 -5.5001E-02 5.6255E-01 4.3747E-01 A10＝ 3.4076E-01 1.1291E-01 2.2394E-01 4.8435E-01 6.4762E-02 -3.2185E-01 1.3137E-01 A12＝ -1.6404E-01 -2.4099E-02 -3.7716E-02 -1.2602E-01 -5.7973E-02 3.4091E-02 -3.2000E-01 A14＝ 4.0672E-02 1.0610E-01 A16＝ -3.9831E-03 surface# 9 10 11 12 13 14 15 k＝ 1.9191E+00 -8.9998E+01 -3.2699E+01 7.5403E+00 -5.6043E+00 -1.1205E-01 -4.1114E+00 A4＝ 1.9585E-03 -2.5253E-01 -2.1390E-01 -4.0280E-02 -3.6273E-01 -1.6293E-02 -3.5851E-02 A6＝ -2.4576E-01 3.4039E-01 3.2372E-01 4.6475E-01 7.0668E-01 -2.8866E-01 -3.9983E-02 A8＝ 2.3285E-01 -5.0360E-01 -4.3500E-01 -1.0211E+00 -1.0538E+00 2.6766E-01 3.4473E-02 A10＝ -6.6955E-02 4.8923E-01 2.5812E-01 1.1673E+00 9.5326E-01 -1.2523E-01 -1.2963E-02 A12＝ -5.6934E-03 -2.1305E-01 1.4317E-02 -7.1032E-01 -4.4800E-01 3.2610E-02 2.6180E-03 A14＝ 3.1480E-02 -6.6898E-02 2.2204E-01 1.0309E-01 -4.4322E-03 -2.7755E-04 A16＝ 1.7712E-02 -2.8435E-02 -9.2712E-03 2.4350E-04 1.2097E-05

[0340] The equations for the aspherical curves in the seventh embodiment are expressed in the same form as in the first embodiment. Furthermore, the parameters of each relation are as explained in the first embodiment, except that the numerical values ​​of each relation are listed in Table 20.

[0341] Table 20: Values ​​of various relations in the seventh embodiment

[0342]

[0343]

[0344] Eighth Embodiment

[0345] The eighth embodiment of the present invention is as follows Figure 8A As shown, the aberration curve of the eighth embodiment is as follows: Figure 8BAs shown. The imaging device of the eighth embodiment includes a camera lens system (unspecified) and an electronic photosensitive element 895. The camera lens system includes, from the object side to the image side, a first lens 810, a second lens 820, an aperture 800, a third lens 830, a fourth lens 840, a fifth lens 850, a sixth lens 860, a seventh lens 870, and an imaging surface 890. The electronic photosensitive element 895 is disposed on the imaging surface 890. The camera lens system includes seven lenses (810, 820, 830, 840, 850, 860, and 870), and there are no other interposed lenses between the seven lenses.

[0346] The first lens 810 has negative refractive power and is made of plastic. Its object side 811 is concave near the optical axis and has at least one inflection point off the axis. Its image side 812 is convex near the optical axis and has at least one inflection point off the axis. Both the object side 811 and the image side 812 are aspherical.

[0347] The second lens 820 has negative refractive power and is made of plastic. Its object side 821 is convex near the optical axis, and its image side 822 is concave near the optical axis. Both the object side 821 and the image side 822 are aspherical.

[0348] The third lens 830 has positive refractive power and is made of plastic. Its object side 831 is convex near the optical axis, and its image side 832 is convex near the optical axis. Both the object side 831 and the image side 832 are aspherical.

[0349] The fourth lens 840 has negative refractive power and is made of plastic. Its object side 841 is convex near the optical axis, and its image side 842 is concave near the optical axis. Both the object side 841 and the image side 842 are aspherical.

[0350] The fifth lens 850 has negative refractive power and is made of plastic. Its object side 851 is convex near the optical axis, and its image side 852 is concave near the optical axis and has at least one critical point off the axis. Both its object side 851 and image side 852 are aspherical.

[0351] The sixth lens 860 has positive refractive power and is made of plastic. Its object side 861 is concave near the optical axis and has at least one inflection point off the axis. Its image side 862 is convex near the optical axis and has at least one inflection point off the axis. Both its object side 861 and image side 862 are aspherical.

[0352] The seventh lens 870 has negative refractive power and is made of plastic. Its object side 871 is convex near the optical axis, and its image side 872 is concave near the optical axis and has at least one inflection point off the axis. Both its object side 871 and image side 872 are aspherical.

[0353] The filter element 880 is located between the seventh lens 870 and the imaging surface 890. It is made of glass and does not affect the focal length.

[0354] The detailed optical data of the eighth embodiment are shown in Table 21, and its aspherical data are shown in Table 22.

[0355] Table 21 Optical data of the eighth embodiment

[0356]

[0357] Table 22 Aspheric coefficients of the eighth embodiment

[0358] surface# 1 2 3 4 6 7 8 k＝ -4.4464E+01 -3.4079E+01 -5.6799E+00 -3.1829E+00 -6.3728E+00 -5.0000E+01 -1.2673E+01 A4＝ -6.6675E-03 7.1805E-03 -5.6730E-02 -1.0803E-01 1.0072E-02 -9.1835E-03 1.3990E-01 A6＝ 1.3846E-02 3.9042E-04 2.2006E-02 4.1844E-03 -8.7979E-02 -2.1616E-01 -3.9324E-01 A8＝ -7.8574E-03 2.4670E-03 -2.4505E-02 -1.4630E-02 -1.2265E-03 1.8827E-01 4.5315E-01 A10＝ 3.1524E-03 2.6489E-04 1.5562E-02 2.9005E-02 1.0936E-02 -6.3969E-02 -2.2337E-01 A12＝ -4.1197E-04 -6.2105E-04 -3.9876E-05 9.1041E-07 1.4948E-04 1.5459E-06 3.9928E-02 A14＝ 4.2986E-04 -1.3746E-05 surface# 9 10 11 12 13 14 15 k＝ 3.9912E+00 -3.8583E+01 -2.1011E+01 1.4223E+01 -5.4777E+00 -1.0264E+01 -4.3677E+00 A4＝ 2.2264E-02 -7.2648E-02 -6.0025E-02 -3.6452E-02 -2.1838E-01 -1.3745E-01 -6.8659E-02 A6＝ -1.1635E-01 -1.4065E-02 5.3240E-03 3.6368E-02 3.1108E-01 3.4140E-02 2.1865E-02 A8＝ 1.2931E-01 -4.0272E-02 -2.9100E-02 -1.1184E-02 -3.5323E-01 -6.4597E-03 -4.6720E-03 A10＝ -5.5360E-02 4.8420E-02 2.7455E-03 -4.8605E-02 2.5986E-01 2.0447E-03 5.1961E-04 A12＝ 6.8750E-03 -7.3146E-03 2.1694E-02 4.5093E-02 -1.1774E-01 -4.7878E-04 -3.1214E-05 A14＝ -2.4738E-05 -1.7275E-03 -1.0356E-02 -1.3903E-02 2.9374E-02 5.4073E-05 1.5541E-06 A16＝ 1.2731E-03 1.4330E-03 -2.9883E-03 -2.3521E-06 -8.6922E-08

[0359] The equations for the aspherical curves in the eighth embodiment are expressed in the same form as in the first embodiment. Furthermore, the parameters of each relation are as explained in the first embodiment, except that the numerical values ​​of each relation are listed in Table 23.

[0360] Table 23 Values ​​of various relations in the eighth embodiment

[0361] f[mm] 3.22 (R5+R6) / (R5-R6) -0.24 Fno. 1.66 f / f5 -0.16 HFOV [deg.] 43.4 f2 / TL -8.54 V5 20.3 (f / f1)+(f / f2) -0.10 Vmin 19.5 (f / f3)+(f / f6) 3.37 V4 / V2 0.35 |f / fi|min 0.03 (Vi / Ni)min 11.67 f / EPD 1.66 ΣAT / ΣCT 0.39 TL / f 1.67 T34 / T45 0.18 TL / ImgH 1.69 T45 / T56 1.74 TL / EPD 2.78 T67 / T56 0.68 f / ImgH 1.01 (T34+T56+T67) / T45 1.14 SD / TD 0.81 f / R8 0.98 BL / EPD 0.59 f / R10 1.26 Yc52 / CT5 4.14 R8 / R13 0.66 (TL×f) / (ImgH×EPD) 2.80

[0362] Ninth Embodiment

[0363] Ninth embodiment of the present invention, for example Figure 9A The aberration curve of the ninth embodiment shown is as follows: Figure 9B As shown. The imaging device of the ninth embodiment includes a camera lens system (unspecified) and an electronic photosensitive element 995. The camera lens system includes, from the object side to the image side, a first lens 910, a second lens 920, an aperture 900, a third lens 930, a fourth lens 940, a fifth lens 950, a sixth lens 960, a seventh lens 970, and an imaging surface 990. The electronic photosensitive element 995 is disposed on the imaging surface 990. The camera lens system includes seven lenses (910, 920, 930, 940, 950, 960, and 970), and there are no other interposed lenses between the seven lenses.

[0364] The first lens 910 has negative refractive power and is made of plastic. Its object side 911 is convex near the optical axis and has at least one inflection point off the axis. Its image side 912 is concave near the optical axis. Both the object side 911 and the image side 912 are aspherical.

[0365] The second lens 920 has negative refractive power and is made of plastic. Its object side 921 is concave near the optical axis, and its image side 922 is convex near the optical axis. Both the object side 921 and the image side 922 are aspherical.

[0366] The third lens 930 has positive refractive power and is made of plastic. Its object side 931 is convex near the optical axis, and its image side 932 is convex near the optical axis. Both the object side 931 and the image side 932 are aspherical.

[0367] The fourth lens 940 has negative refractive power and is made of plastic. Its object side 941 is convex near the optical axis, and its image side 942 is concave near the optical axis. Both its object side 941 and image side 942 are aspherical.

[0368] The fifth lens 950 has positive refractive power and is made of plastic. Its object side 951 is concave near the optical axis, and its image side 952 is convex near the optical axis and has at least one critical point off the axis. Both its object side 951 and image side 952 are aspherical.

[0369] The sixth lens 960 has positive refractive power and is made of plastic. Its object side 961 is concave near the optical axis and has at least one inflection point off the axis. Its image side 962 is convex near the optical axis and has at least one inflection point off the axis. Both its object side 961 and image side 962 are aspherical.

[0370] The seventh lens 970 has negative refractive power and is made of plastic. Its object side 971 is convex near the optical axis, and its image side 972 is concave near the optical axis and has at least one inflection point off the axis. Both its object side 971 and image side 972 are aspherical.

[0371] The filter element 980 is located between the seventh lens 970 and the imaging surface 990. It is made of glass and does not affect the focal length.

[0372] Detailed optical data for the ninth embodiment are shown in Table 24, and its aspherical data are shown in Table 25. The equation for the aspherical curve in the ninth embodiment is expressed in the same form as in the first embodiment.

[0373] Table 24 Optical Data of the Ninth Embodiment

[0374]

[0375] Table 25 Aspheric coefficients of the ninth embodiment

[0376] surface# 1 2 3 4 6 7 8 k＝ -1.7758E+01 -2.4207E+01 -1.1069E+00 -1.3405E+01 -6.6366E+00 -4.7325E+00 -8.7601E-01 A4＝ 1.1522E-01 2.0350E-01 5.3467E-02 -2.4106E-01 2.8931E-02 1.4941E-01 6.7944E-02 A6＝ -1.1560E-01 -1.2849E-01 -7.7906E-02 2.7321E-01 6.2533E-03 -4.1117E-01 -4.4399E-01 A8＝ 4.7449E-02 2.1058E-02 2.6558E-03 -3.2947E-01 -6.8383E-02 4.4494E-01 6.1037E-01 A10＝ -2.2182E-02 -8.0574E-03 2.4964E-02 2.3958E-01 4.7587E-02 -2.5367E-01 -3.6138E-01 A12＝ 1.3397E-02 9.7100E-03 -7.6090E-03 -7.2608E-02 -1.1056E-02 5.6853E-02 9.2486E-02 A14＝ -4.4040E-03 -8.0739E-03 A16＝ 5.1952E-04 surface# 9 10 11 12 13 14 15 k＝ 8.1482E-01 -8.9998E+01 -3.2746E+01 6.2296E-01 -4.3832E+00 -2.2310E-01 -3.8002E+00 A4＝ -5.4999E-02 3.6826E-02 2.7201E-02 -7.0532E-02 -3.4828E-01 1.5850E-03 -4.1795E-02 A6＝ -1.6239E-01 -2.7382E-01 -1.4593E-01 7.9701E-01 8.7123E-01 -2.3064E-01 -3.5354E-02 A8＝ 2.2673E-01 3.2229E-01 1.1155E-01 -1.4808E+00 -1.2077E+00 2.0630E-01 3.6202E-02 A10＝ -1.0375E-01 -1.4675E-01 -1.9327E-01 1.3120E+00 1.0217E+00 -9.9584E-02 -1.5953E-02 A12＝ 8.1545E-03 -3.2405E-02 2.7906E-01 -5.2202E-01 -5.0426E-01 2.8937E-02 4.0127E-03 A14＝ 5.4801E-04 5.8454E-02 -1.6913E-01 3.2910E-02 1.4074E-01 -5.0041E-03 -5.9892E-04 A16＝ -1.5429E-02 3.6815E-02 3.5887E-02 -2.0391E-02 4.7428E-04 4.9535E-05 A18＝ -7.6691E-03 1.1637E-03 -1.9053E-05 -1.7472E-06

[0377] Furthermore, the parameters of each relation are as explained in the first embodiment, except that the values ​​of each relation are listed in Table 26.

[0378] Table 26 Values ​​of various relations in the ninth embodiment

[0379] f[mm] 2.63 (R5+R6) / (R5-R6) -0.39 Fno. 1.80 f / f5 0.06 HFOV [deg.] 50.8 f2 / TL -3.24 V5 30.2 (f / f1)+(f / f2) -0.42 Vmin 17.5 (f / f3)+(f / f6) 2.67 V4 / V2 0.31 |f / fi|min 0.06 (Vi / Ni)min 10.14 f / EPD 1.80 ΣAT / ΣCT 0.60 TL / f 2.11 T34 / T45 0.28 TL / ImgH 1.76 T45 / T56 1.85 TL / EPD 3.80 T67 / T56 0.49 f / ImgH 0.83 (T34+T56+T67) / T45 1.09 SD / TD 0.71 f / R8 1.35 BL / EPD 0.72 f / R10 -0.16 Yc52 / CT5 4.75 R8 / R13 0.91 (TL×f) / (ImgH×EPD) 3.17

[0380] The Tenth Embodiment

[0381] A three-dimensional schematic diagram of an image capturing device 10a according to the tenth embodiment of the present invention is shown below. Figure 11 As shown. By Figure 11 As can be seen, in this embodiment, the image capturing device 10a is a camera module. The image capturing device 10a includes an imaging lens 11a, a driving device 12a, and an electronic photosensitive element 13a, wherein the imaging lens 11a includes the camera lens system of the first embodiment of the present invention and a lens barrel (not otherwise labeled) carrying the camera lens system. The image capturing device 10a uses the imaging lens 11a to focus light to generate an image, and cooperates with the driving device 12a to focus the image, finally imaging it on the electronic photosensitive element 13a and outputting the image data.

[0382] The drive unit 12a can be an auto-focus module, and its driving method can use drive systems such as voice coil motors (VCM), microelectromechanical systems (MEMS), piezoelectric systems, and shape memory alloys. The drive unit 12a enables the imaging lens 11a to achieve a better imaging position, allowing for clear image capture of the subject at different object distances.

[0383] The imaging device 10a can be equipped with an electronic image sensor 13a (such as CMOS or CCD) with high sensitivity and low noise, which is placed on the imaging surface of the camera lens system, so as to truly present the good imaging quality of the imaging optical lens.

[0384] Furthermore, the image capturing device 10a may also include an image stabilization module 14a, which may be a kinetic energy sensing element such as an accelerometer, gyroscope, or Hall effect sensor. In the tenth embodiment, the image stabilization module 14a is a gyroscope, but it is not limited thereto. By adjusting the changes in different axes of the image capturing optical lens to compensate for the blurry image caused by shaking during shooting, the imaging quality of shooting in dynamic and low-light scenes is further improved, and advanced image compensation functions such as optical image stabilization (OIS) and electronic image stabilization (EIS) are provided.

[0385] Eleventh Embodiment

[0386] Eleventh embodiment of the present invention, for example Figure 12A and Figure 12B As shown, where Figure 12A A front view of an electronic device 1200. Figure 12B for Figure 12A A rear view of the electronic device 1200. In this embodiment, the electronic device 1200 is a smartphone. The electronic device 1200 includes image capturing devices 1201, 1202, 1203, and 1204, and a display device 1205. Figure 12A As shown, the image capturing device 1201 is located above the display device 1205 of the electronic device 1200. For example... Figure 12B As shown, image capturing devices 1202, 1203, and 1204 face the same direction and are horizontally arranged on the upper edge of the back of the electronic device 1200. Image capturing devices 1201 and 1202 are optical lenses as used in the first embodiment of the present invention, image capturing device 1203 is a general-view lens, and image capturing device 1204 is a telephoto lens. The viewing angles of image capturing devices 1202 and 1203 differ by at least 20 degrees.

[0387] The electronic devices described above are merely illustrative examples illustrating the practical application of the present invention and are not intended to limit the scope of application of the imaging device of the present invention. Preferably, the electronic device may further include a control unit, a display unit, a storage unit, a temporary storage unit (RAM), or a combination thereof.

[0388] The tables above show different numerical variations of the optical lens in the embodiments of the present invention. However, the numerical variations in each embodiment of the present invention are all obtained from experiments. Even if different values ​​are used, products with the same structure should still fall within the protection scope disclosed in the present invention. Therefore, the descriptions and figures above are only illustrative and are not intended to limit the scope of the patent application disclosed in the present invention.

Claims

1. A photographic lens system, characterized in that, It contains seven lenses, which are arranged in the following order from the object side to the image side: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens. Each of the first to the seventh lenses includes an object-side surface facing the object side and an image-side surface facing the image side. The first lens has negative refractive power, the second lens has negative refractive power, the third lens has positive refractive power, and the image-side surface of the third lens is convex near the optical axis. The fourth lens has negative refractive power, the sixth lens has positive refractive power, and the seventh lens has negative refractive power. The image-side surface of the seventh lens is concave near the optical axis and has at least one inflection point off-axis. The photographic lens system comprises seven lenses in total. It also includes an aperture between the second and third lenses. The distance on the optical axis between the object-side surface of the first lens and an image plane is TL. The focal length of the photographic lens system is f. The maximum image height of the photographic lens system is ImgH. The total distance on the optical axis between any two adjacent lenses in the photographic lens system is ΣAT. The total thickness of all lenses on the optical axis in the photographic lens system is ΣCT. The entrance pupil diameter of the photographic lens system is EPD. The Abbe number of the fifth lens is V5, satisfying the following relationship: 0.80 < TL / f < 3.60; 1.0 < TL / ImgH < 2.10; 0.10 < ΣAT / ΣCT < 0.83; 1.50 < (TL×f) / (ImgH×EPD) < 4.30; and 10.0 < V5 < 35.0。 2. The photographic lens system as claimed in claim 1, characterized in that, The seventh lens has a convex surface near the optical axis.

3. The photographic lens system as described in claim 1, characterized in that, The first lens has a concave side near the optical axis and at least one inflection point off the optical axis.

4. The photographic lens system as claimed in claim 1, characterized in that, The fifth lens has negative refractive power.

5. The photographic lens system as claimed in claim 1, characterized in that, The side of the sixth lens is convex near the optical axis.

6. The photographic lens system as claimed in claim 1, characterized in that, The distance along the optical axis between the object side of the first lens and the imaging plane is TL, and the entrance pupil diameter of the photographic lens system is EPD, satisfying the following relationship: 1.50 < TL / EPD < 4.

0.

7. The photographic lens system as claimed in claim 1, characterized in that, The focal length of the photographic lens system is f, the entrance pupil diameter is EPD, the maximum image height is ImgH, the sum of the optical axis spacing between all two adjacent lenses in the photographic lens system is ΣAT, the sum of the optical axis thickness of all lenses in the photographic lens system is ΣCT, and the distance between the object side of the first lens and the imaging plane on the optical axis is TL, satisfying the following relationship: 1.57 <= TL / ImgH <= 1.82; 0.30 <= ΣAT / ΣCT < 0.61; and 2.77 <= (TL×f) / (ImgH×EPD) < 3.

50.

8. The photographic lens system as claimed in claim 1, characterized in that, The distance on the optical axis between the aperture and the image side of the seventh lens is SD, the distance on the optical axis between the object side of the first lens and the image side of the seventh lens is TD, and half of the maximum angle of view in the photographic lens system is HFOV, satisfying the following relationship: 0.60 < SD / TD < 0.88; and 43.0 degrees < HFOV < 70.0 degrees.

9. The photographic lens system as claimed in claim 1, characterized in that, The distance on the optical axis between the image-side surface of the seventh lens and the imaging plane is BL; the entrance pupil diameter of the photographic lens system is EPD; the distance on the optical axis between the aperture and the image-side surface of the seventh lens is SD; and the distance on the optical axis between the object-side surface of the first lens and the image-side surface of the seventh lens is TD, satisfying the following relationship: 0.20 < BL / EPD < 1.0; and 0.60 < SD / TD < 0.

88.

10. The photographic lens system as claimed in claim 1, characterized in that, The Abbe number of the first lens is V1, the Abbe number of the second lens is V2, the Abbe number of the third lens is V3, the Abbe number of the fourth lens is V4, the Abbe number of the fifth lens is V5, the Abbe number of the sixth lens is V6, and the Abbe number of the seventh lens is V7. The refractive index of the first lens is N1, the refractive index of the second lens is N2, the refractive index of the third lens is N3, the refractive index of the fourth lens is N4, the refractive index of the fifth lens is N5, the refractive index of the sixth lens is N6, and the refractive index of the seventh lens is N7. The smallest of V1 / N1, V2 / N2, V3 / N3, V4 / N4, V5 / N5, V6 / N6, and V7 / N7 is (Vi / Ni)min, satisfying the following relationship: 5.0 < (Vi / Ni)min < 11.

8.

11. The photographic lens system as claimed in claim 1, characterized in that, The distance on the optical axis between the object side of the first lens and the imaging plane is TL; the maximum image height of the photographic lens system is ImgH; the sum of the optical axis spacing between all two adjacent lenses in the photographic lens system is ΣAT; the sum of the thicknesses of all lenses in the photographic lens system on the optical axis is ΣCT; the distance on the optical axis between the third and fourth lenses is T34; the distance on the optical axis between the fourth and fifth lenses is T45; the distance on the optical axis between the fifth and sixth lenses is T56; and the distance on the optical axis between the sixth and seventh lenses is T67. The following relationships are satisfied: 1.20 < TL / ImgH <= 1.82; 0.10 < ΣAT / ΣCT < 0.61; and 0.20 < (T34+T56+T67) / T45 < 1.

85.

12. The photographic lens system as claimed in claim 11, characterized in that, The distance on the optical axis between the object side of the first lens and the imaging plane is TL, the focal length of the photographic lens system is f, the maximum image height of the photographic lens system is ImgH, and the entrance pupil diameter of the photographic lens system is EPD, satisfying the following relationship: 1.80 < (TL×f) / (ImgH×EPD) < 3.

50.

13. The photographic lens system as claimed in claim 1, characterized in that, The Abbe number of the fifth lens is V5, which satisfies the following relationship: 10.0 < V5 <=30.2。 14. A photographic lens system, characterized in that, It contains seven lenses, which are arranged in the following order from the object side to the image side: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens. Each of the first to the seventh lenses includes an object-side surface facing the object side and an image-side surface facing the image side. The first lens has negative refractive power, the second lens has negative refractive power, the third lens has positive refractive power, the fourth lens has negative refractive power, the sixth lens has positive refractive power, and the seventh lens has negative refractive power. The image-side surface of the seventh lens is concave near the optical axis and has at least one inflection point off the axis. The photographic lens system comprises seven lenses in total. The distance on the optical axis between the object-side surface of the first lens and an imaging plane is TL. The focal length of the photographic lens system is f. The maximum image height of the photographic lens system is ImgH. The distance on the optical axis between the third and fourth lenses is T34. The distance on the optical axis between the fourth and fifth lenses is T45. The distance on the optical axis between the fifth and sixth lenses is T56. The distance on the optical axis between the sixth and seventh lenses is T67. The entrance pupil diameter of the photographic lens system is EPD. The Abbe number of the fifth lens is V5. The following relationship is satisfied: 0.80 < TL / f < 3.60; 1.0 < TL / ImgH < 2.10; 0.20 < (T34+T56+T67) / T45 < 2.80; 1.50 < (TL×f) / (ImgH×EPD) < 4.30; and 10.0 < V5 < 35.0。 15. The photographic lens system as claimed in claim 14, characterized in that, The first lens has a concave side surface near the optical axis, and the first lens has at least one inflection point off-axis. The seventh lens has a convex side surface near the optical axis.

16. The photographic lens system as claimed in claim 14, characterized in that, The fifth lens has negative refractive power.

17. The photographic lens system as claimed in claim 14, characterized in that, The distance along the optical axis between the object side of the first lens and the imaging plane is TL, and the entrance pupil diameter of the photographic lens system is EPD, satisfying the following relationship: 1.50 < TL / EPD < 4.

0.

18. The photographic lens system as claimed in claim 14, characterized in that, The focal length of the photographic lens system is f, the entrance pupil diameter is EPD, the focal length of the second lens is f2, and the distance on the optical axis between the object side of the first lens and the imaging plane is TL, satisfying the following relationship: 1.0 < f / EPD < 2.0; and f2 / TL < -0.

70.

19. The photographic lens system as claimed in claim 14, characterized in that, The distance on the optical axis between the object-side surface of the first lens and the imaging plane is TL; the focal length of the photographic lens system is f; the focal length of the third lens is f3; the focal length of the sixth lens is f6; the distance on the optical axis between the third lens and the fourth lens is T34; the distance on the optical axis between the fourth lens and the fifth lens is T45; the distance on the optical axis between the fifth lens and the sixth lens is T56; and the distance on the optical axis between the sixth lens and the seventh lens is T67. The following relationship is satisfied: 1.54 <= TL / f < 3.60; 0.79 <= (T34+T56+T67) / T45 < 1.85; and 2.0 < (f / f3)+(f / f6) <= 3.

37.

20. The photographic lens system as claimed in claim 14, characterized in that, The Abbe number of the fifth lens is V5, which satisfies the following relationship: 19.5 <= V5 < 35.0。 21. A photographic lens system, characterized in that, It contains seven lenses, which are arranged in the following order from the object side to the image side: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens. Each of the first to the seventh lenses includes an object-side surface facing the object side and an image-side surface facing the image side. The first lens has negative refractive power, the second lens has negative refractive power, the third lens has positive refractive power, the fourth lens has negative refractive power, the sixth lens has positive refractive power, and the seventh lens has negative refractive power. The image-side surface of the seventh lens is concave near the optical axis and has at least one inflection point off the axis. The photographic lens system comprises seven lenses. The distance on the optical axis between the object side of the first lens and an imaging plane is TL. The focal length of the photographic lens system is f. The focal length of the third lens is f3. The focal length of the sixth lens is f6. The maximum image height of the photographic lens system is ImgH. The total distance on the optical axis between any two adjacent lenses in the photographic lens system is ΣAT. The total thickness of all lenses on the optical axis in the photographic lens system is ΣCT. The entrance pupil diameter of the photographic lens system is EPD. The Abbe number of the fifth lens is V5. The following relationship is satisfied: 0.80 < TL / f < 3.60; 2.0 < (f / f3) + (f / f6) < 5.0; 1.0 < TL / ImgH < 2.10; 0.10 < ΣAT / ΣCT < 0.83; 1.50 < (TL×f) / (ImgH×EPD) < 4.30; and 10.0 < V5 < 35.0。 22. The photographic lens system as claimed in claim 21, characterized in that, The seventh lens has a convex surface near the optical axis.

23. The photographic lens system as claimed in claim 21, characterized in that, The first lens has a concave side near the optical axis and at least one inflection point off the optical axis.

24. The photographic lens system as claimed in claim 21, characterized in that, The distance along the optical axis between the object side of the first lens and the imaging plane is TL, and the entrance pupil diameter of the photographic lens system is EPD, satisfying the following relationship: 2.78 <= TL / EPD < 4.

0.

25. The photographic lens system as claimed in claim 21, characterized in that, The Abbe number of the first lens is V1, the Abbe number of the second lens is V2, the Abbe number of the third lens is V3, the Abbe number of the fourth lens is V4, the Abbe number of the fifth lens is V5, the Abbe number of the sixth lens is V6, and the Abbe number of the seventh lens is V7. The refractive index of the first lens is N1, the refractive index of the second lens is N2, the refractive index of the third lens is N3, the refractive index of the fourth lens is N4, the refractive index of the fifth lens is N5, the refractive index of the sixth lens is N6, and the refractive index of the seventh lens is N7. The smallest of V1 / N1, V2 / N2, V3 / N3, V4 / N4, V5 / N5, V6 / N6, and V7 / N7 is (Vi / Ni)min, satisfying the following relationship: 10.14 <= ​​(Vi / Ni)min < 11.

8.

26. The photographic lens system as claimed in claim 21, characterized in that, The distance on the optical axis between the object side of the first lens and the imaging plane is TL, the focal length of the photographic lens system is f, the focal length of the third lens is f3, the focal length of the sixth lens is f6, the maximum image height of the photographic lens system is ImgH, and the entrance pupil diameter of the photographic lens system is EPD, satisfying the following relationship: 1.54 <= TL / f < 2.60; 2.36 <= (f / f3) + (f / f6) <= 3.37; and 2.77 <= (TL×f) / (ImgH×EPD) <= 3.

27.

27. The photographic lens system as claimed in claim 21, characterized in that, The Abbe number of the fifth lens is V5, which satisfies the following relationship: 19.5<=V5 <=30.2。

Images