Image capturing optical lens, image capturing device and electronic device

Abstract

The invention discloses an image capturing optical lens comprising eight lenses. The eight lenses are sequentially a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens and an eighth lens from the object side to the image side along an optical path. Each of the eight lenses has an object-side surface facing the object-side direction and an image-side surface facing the image-side direction. The first lens element has negative refractive power. The fourth lens element has an object-side surface being convex in a paraxial region thereof. The fifth lens element has an image-side surface being concave in a paraxial region thereof. The seventh lens element has at least one inflection point on the object-side surface thereof. The eighth lens element with negative refractive power has an object-side surface being concave in a paraxial region thereof. When specific conditions are met, the imaging optical lens can meet the requirements of wide viewing angle, miniaturization and high imaging quality at the same time. The invention further discloses an image capturing device with the image capturing optical lens and an electronic device with the image capturing device.

Description

Technical Field

[0001] This disclosure relates to an image-capturing optical lens, an image-capturing device, and an electronic device, particularly an image-capturing optical lens and an image-capturing device suitable for electronic devices. Background Technology

[0002] With advancements in semiconductor technology, the performance of electronic image sensors has improved, and pixels can be made smaller. As a result, optical lenses with high image quality have become an indispensable component.

[0003] With the rapid advancement of technology, electronic devices equipped with optical lenses are finding increasingly wider applications, leading to more diverse requirements for these lenses. Since existing optical lenses often struggle to achieve a balance between image quality, sensitivity, aperture size, size, and viewing angle, this invention provides an optical lens with high image quality to meet these demands. Summary of the Invention

[0004] This disclosure provides an imaging optical lens, an imaging device, and an electronic device. The imaging optical lens comprises eight lenses arranged sequentially along the optical path from the object side to the image side. Under certain conditions, the imaging optical lens provided by this disclosure can simultaneously meet the requirements of wide viewing angle, miniaturization, and high image quality.

[0005] This disclosure provides an imaging optical lens comprising eight lenses. The eight lenses, arranged sequentially from the object side to the image side along the optical path, are a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, and an eighth lens. Each of the eight lenses has an object-side surface facing the object side and an image-side surface facing the image side. Preferably, the first lens has negative refractive power. Preferably, the object-side surface of the fourth lens is convex near the optical axis. Preferably, the image-side surface of the fifth lens is concave near the optical axis. Preferably, the object-side surface of the seventh lens has at least one inflection point. Preferably, the eighth lens has negative refractive power. Preferably, the object-side surface of the eighth lens is concave near the optical axis. Preferably, the imaging optical lens further includes an aperture. The distance on the optical axis from the object-side surface of the first lens to the image-side surface of the third lens is Dr1r6; the distance on the optical axis from the aperture to the image-side surface of the eighth lens is SD; the optical axis spacing between the second and third lenses is T23; the optical axis spacing between the third and fourth lenses is T34; the optical axis spacing between the fourth and fifth lenses is T45; the Abbe number of the third lens is V3; and the refractive index of the third lens is N3. Preferably, the following conditions are satisfied:

[0006] 1.05 <Dr1r6 / SD<2.00;

[0007] 0.03 < (T23 + T45) / T34 < 5.00; and

[0008] 17.00 < V3 / N3 < 50.00.

[0009] The present disclosure further provides an imaging optical lens, including eight lenses. The eight lenses are, in order from the object side to the image side along the optical path, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, and an eighth lens. The eight lenses respectively have an object-side surface facing the object side and an image-side surface facing the image side. Preferably, the object-side surface of the second lens is concave near the optical axis. Preferably, the image-side surface of the second lens is convex near the optical axis. Preferably, the object-side surface of the fourth lens is convex near the optical axis. Preferably, the fifth lens has a negative refractive power. Preferably, the object-side surface of the seventh lens has at least one inflection point. Preferably, the imaging optical lens further includes an aperture. The distance on the optical axis from the object-side surface of the first lens to the image-side surface of the third lens is Dr1r6, the distance on the optical axis from the aperture to the image-side surface of the eighth lens is SD, the radius of curvature of the image-side surface of the first lens is R2, the radius of curvature of the image-side surface of the eighth lens is R16, and the maximum viewing angle in the imaging optical lens is FOV, which preferably satisfies the following conditions:

[0010] 1.05 < Dr1r6 / SD < 2.00;

[0011] -1.00 < R2 / R16 < 1.30; and

[0012] 130.0 degrees < FOV < 200.0 degrees.

[0013] The present disclosure provides an imaging device, which includes the foregoing imaging optical lens and an electronic photosensitive element, wherein the electronic photosensitive element is disposed on the imaging surface of the imaging optical lens.

[0014] The present disclosure provides an electronic device, which includes the foregoing imaging device.

[0015] When Dr1r6 / SD satisfies the above conditions, it is possible to assist with the aperture position to control the volume of the imaging optical lens at the object side end, which helps to achieve a balance between the total length and the aperture configuration.

[0016] When (T23 + T45) / T34 satisfies the above conditions, the configuration of the lens spacing can be adjusted, which helps to guide large-angle-view light rays into the imaging surface.

[0017] When V3 / N3 satisfies the above conditions, the material configuration of the third lens can be adjusted, which helps to balance the converging ability between light rays of different wavelength bands.

[0018] When R2 / R16 satisfies the above conditions, the surface shapes and refractive powers of the first lens and the eighth lens can be regulated to correct astigmatism and field curvature, thereby improving the imaging quality.

[0019] When the FOV meets the above conditions, the optical lens can have a wider field of view, thereby expanding the application range of the product.

[0020] The foregoing description of the contents of this disclosure and the following description of the embodiments are used to demonstrate and explain the spirit and principles of this disclosure, and to provide a further explanation of the claims of this disclosure. Attached Figure Description

[0021] Figure 1 A schematic diagram of an image-capturing device according to a first embodiment of this disclosure is shown.

[0022] Figure 2 From left to right, the graphs show the spherical aberration, astigmatism, and distortion curves of the first embodiment.

[0023] Figure 3 A schematic diagram of an image-capturing device according to a second embodiment of the present disclosure is shown.

[0024] Figure 4 From left to right, the graphs show the spherical aberration, astigmatism, and distortion curves of the second embodiment.

[0025] Figure 5 A schematic diagram of an imaging device according to a third embodiment of this disclosure is shown.

[0026] Figure 6 From left to right, the graphs show the spherical aberration, astigmatism, and distortion curves of the third embodiment.

[0027] Figure 7 A schematic diagram of an imaging device according to the fourth embodiment of this disclosure is shown.

[0028] Figure 8 From left to right, the graphs show the spherical aberration, astigmatism, and distortion curves of the fourth embodiment.

[0029] Figure 9 A schematic diagram of an imaging device according to the fifth embodiment of this disclosure is shown.

[0030] Figure 10 From left to right, the graphs show the spherical aberration, astigmatism, and distortion curves of the fifth embodiment.

[0031] Figure 11 A schematic diagram of an imaging device according to the sixth embodiment of this disclosure is shown.

[0032] Figure 12 From left to right, the graphs show the spherical aberration, astigmatism, and distortion curves of the sixth embodiment.

[0033] Figure 13 A schematic diagram of an imaging device according to the seventh embodiment of this disclosure is shown.

[0034] Figure 14 From left to right, the graphs show the spherical aberration, astigmatism, and distortion curves of the seventh embodiment.

[0035] Figure 15 A schematic diagram of an imaging device according to the eighth embodiment of this disclosure is shown.

[0036] Figure 16 From left to right, the graphs show the spherical aberration, astigmatism, and distortion curves of the eighth embodiment.

[0037] Figure 17 A schematic diagram of an imaging device according to the ninth embodiment of this disclosure is shown.

[0038] Figure 18 From left to right, the graphs show the spherical aberration, astigmatism, and distortion curves of the ninth embodiment.

[0039] Figure 19 A schematic diagram of an imaging device according to the tenth embodiment of this disclosure is shown.

[0040] Figure 20 From left to right, the graphs show the spherical aberration, astigmatism, and distortion curves of the tenth embodiment.

[0041] Figure 21 A schematic diagram of an imaging device according to the eleventh embodiment of this disclosure is shown.

[0042] Figure 22 From left to right, the graphs show the spherical aberration, astigmatism, and distortion curves of the eleventh embodiment.

[0043] Figure 23 A schematic diagram of an imaging device according to the twelfth embodiment of this disclosure is shown.

[0044] Figure 24 From left to right, the graphs show the spherical aberration, astigmatism, and distortion curves of the twelfth embodiment.

[0045] Figure 25 A perspective view of an imaging device according to the thirteenth embodiment of this disclosure is shown.

[0046] Figure 26 A perspective view of one side of an electronic device according to the fourteenth embodiment of this disclosure is shown.

[0047] Figure 27 Draw Figure 26 A three-dimensional diagram of the other side of the electronic device.

[0048] Figure 28 A perspective view of one side of an electronic device according to the fifteenth embodiment of this disclosure is shown.

[0049] Figure 29 Draw Figure 28A three-dimensional diagram of the other side of the electronic device.

[0050] Figure 30 Draw Figure 28 System block diagram of an electronic device.

[0051] Figure 31 A perspective view of one side of an electronic device according to the sixteenth embodiment of this disclosure is shown.

[0052] Figure 32 A perspective view of one side of an electronic device according to the seventeenth embodiment of this disclosure is shown.

[0053] Figure 33 A schematic diagram illustrating the inflection point, the critical point, and the parameters Yc71 and Yi81 on the lens surface according to the first embodiment of this disclosure is shown.

[0054] Figure 34 A schematic diagram illustrating parameters ET1, ET3, ET6, SAG1R2, Y1R1, Y4R1, Y5R2, Y6R1, Y6R2, Y7R1 and Y8R2 in the first embodiment according to this disclosure is shown.

[0055] Figure 35 A schematic diagram illustrating an arrangement of an optical path reversing element in an imaging optical lens according to the present invention is shown.

[0056] Figure 36 A schematic diagram illustrating another configuration of an optical path reversing element in an imaging optical lens according to the present invention is shown.

[0057] Figure 37 A schematic diagram illustrating one configuration of the two optical path deflection elements disclosed herein in an imaging optical lens.

[0058] [Symbol Explanation]

[0059] 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 100, 100a, 100b, 100c, 100d, 100e, 100f , 100g, 100h, 100i, 100j, 100k, 100m, 100n, 100p, 100q, 100r, 100s: imaging device

[0060] 101: Imaging Lens

[0061] 102: Drive unit

[0062] 103: Electronic photosensitive element

[0063] 104: Image Stabilization Module

[0064] 200, 300, 400, 500: Electronic devices

[0065] 201, 304: Display module

[0066] 301, 401, 501: Flash module

[0067] 302: Focusing Assist Module

[0068] 303: Image Signal Processor

[0069] 305: Image Software Processor

[0070] 306: Subject

[0071] C: Critical point

[0072] P: Inversion point

[0073] OA1: First optical axis

[0074] OA2: Second optical axis

[0075] OA3: Third optical axis

[0076] LF: Optical path switching element

[0077] LF1: First optical path switching element

[0078] LF2: Second optical path switching element

[0079] LG: Lens Group

[0080] ST: Aperture

[0081] S1, S2, S3: Aperture

[0082] E1: First lens

[0083] E2: Second lens

[0084] E3: Third Lens

[0085] E4: Fourth Lens

[0086] E5: Fifth Lens

[0087] E6: Sixth Lens

[0088] E7: Seventh Lens

[0089] E8: Eighth Lens

[0090] E9: Filter element

[0091] IMG: Imaging Surface

[0092] IS: Electronic photosensitive element

[0093] ET1: The distance parallel to the optical axis between the position of the maximum effective radius of the object-side surface of the first lens and the position of the maximum effective radius of the image-side surface of the first lens.

[0094] ET3: The distance parallel to the optical axis between the maximum effective radius of the object-side surface of the third lens and the maximum effective radius of the image-side surface of the third lens.

[0095] ET6: The distance parallel to the optical axis between the maximum effective radius of the object-side surface of the sixth lens and the maximum effective radius of the image-side surface of the sixth lens.

[0096] SAG1R2: The displacement parallel to the optical axis from the point where the image-side surface of the first lens intersects the optical axis to the position of the maximum effective radius of the image-side surface of the first lens.

[0097] Y1R1: Maximum effective radius of the object-side surface of the first lens

[0098] Y4R1: Maximum effective radius of the object-side surface of the fourth lens

[0099] Y5R2: Maximum effective radius of the image-side surface of the fifth lens

[0100] Y6R1: Maximum effective radius of the object-side surface of the sixth lens

[0101] Y6R2: Maximum effective radius of the image-side surface of the sixth lens

[0102] Y7R1: Maximum effective radius of the object-side surface of the seventh lens

[0103] Y8R2: Maximum effective radius of the image-side surface of the eighth lens

[0104] Yc71: The perpendicular distance between the critical point on the object-side surface of the seventh lens, closest to the optical axis and the optical axis.

[0105] Yi81: The perpendicular distance between the inflection point closest to the optical axis on the object-side surface of the eighth lens and the optical axis. Detailed Implementation

[0106] The imaging optical lens comprises eight lenses, which are arranged sequentially from the object side to the image side along the optical path as a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, and an eighth lens. Each of the eight lenses has an object-side surface facing the object side and an image-side surface facing the image side.

[0107] The first lens can have negative refractive power. This facilitates the formation of a short focal length lens structure, allowing light from a wide angle of view to enter the imaging optical lens, thereby expanding the light-gathering range to meet a wider range of applications.

[0108] The object-side surface of the second lens can be concave near the optical axis. This allows control over the shape of the object-side surface, helping to buffer incident light from wide angles and reduce spherical aberration in the imaging lens. The image-side surface of the second lens can be convex near the optical axis. This helps prevent light divergence and corrects astigmatism.

[0109] The fourth lens may have positive refractive power. This helps balance the aberrations of the first to third lenses and aids in converging light rays to reduce volume. The object-side surface of the fourth lens is convex near the optical axis. This enhances the converging ability of the fourth lens and effectively corrects spherical aberration in the imaging optics. The image-side surface of the fourth lens may also be convex near the optical axis. This helps converge light rays, reduces the length of the imaging optics, and facilitates aberration correction.

[0110] The fifth lens can have negative refractive power. This, in conjunction with the refractive power of the fourth lens, balances the overall refractive power distribution of the imaging optics and helps to balance aberrations such as spherical aberration caused by volume compression. The image-side surface of the fifth lens can be concave near the optical axis. This allows adjustment of the light exiting the fifth lens, helping to increase the image area.

[0111] The seventh lens can have positive refractive power. This helps to reduce the length of the imaging optics at the image side. The object-side surface of the seventh lens can be convex near the optical axis. This allows adjustment of the surface shape and refractive power of the seventh lens, which is beneficial for correcting field curvature and reducing the back focal length.

[0112] The eighth lens can have negative refractive power. This allows for effective control of the back focal length, thereby reducing the overall length of the imaging optical lens. The object-side surface of the eighth lens can be concave near the optical axis. This allows for control of the angle of incidence of light on the object-side surface of the eighth lens, preventing excessive incident angles that could cause light divergence and poor peripheral illumination.

[0113] According to the imaging optical lens disclosed herein, the object-side surface of the first lens may have at least one convex surface at the off-axis location. This facilitates the reception of peripheral light to obtain a wider range of image information.

[0114] According to the imaging optical lens disclosed herein, the object-side surface of the seventh lens has at least one inflection point. This helps reduce surface reflection of light rays at wide viewing angles, enhances the ability of the seventh lens to correct image aberrations at the periphery, and balances the light-gathering quality of incident light rays at wide viewing angles. According to the imaging optical lens disclosed herein, the object-side surface of the eighth lens may also have at least one inflection point. This facilitates adjustment of the peripheral optical path, avoids vignetting at the image periphery, and simultaneously improves image plane curvature and distortion problems. Please refer to... Figure 33 This is a schematic diagram illustrating the inflection point P of the object-side surface of the seventh lens E7 and the object-side surface of the eighth lens E8 according to the first embodiment of this disclosure. Figure 33 The inflection points P on the object-side surface of the seventh lens E7 and the object-side surface of the eighth lens E8 in the first embodiment of the present disclosure are shown, together with the inflection points P on the image-side surface of the second lens E2, the object-side surface of the third lens E3, the object-side surface of the sixth lens E6, the image-side surface of the sixth lens E6, the image-side surface of the seventh lens E7, and the image-side surface of the eighth lens E8, as an exemplary illustration. However, in each embodiment of the present disclosure, each lens surface may have one or more inflection points.

[0115] In the imaging optical lens disclosed according to the present disclosure, at least one lens may be made of glass material. Thereby, the degree of freedom in configuring the refractive power of the imaging optical lens can be increased, and the influence of the ambient temperature on the imaging optical lens can be reduced. In the imaging optical lens disclosed according to the present disclosure, at least two lenses may be made of plastic material. Thereby, it helps to reduce the production cost and the manufacturing difficulty of the aspherical lens.

[0116] In the imaging optical lens disclosed according to the present disclosure, at least one lens may have both its object-side surface and image-side surface as spherical surfaces. Thereby, it is beneficial to reduce the manufacturing tolerance. Among them, in the imaging optical lens, at least one lens may be made of glass material and both its object-side surface and image-side surface may be spherical surfaces. Thereby, the manufacturability and production qualification rate can be effectively improved, and the service life of the product can be increased.

[0117] In the imaging optical lens disclosed according to the present disclosure, there may be an air gap on the optical axis between all adjacent lenses. That is, the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, the seventh lens, and the eighth lens may be eight single non-bonded lenses. Since the process of bonded lenses is more complex than that of non-bonded lenses, especially the bonding surface of the two lenses needs to have a highly accurate curved surface in order to achieve a high degree of tightness when the two lenses are bonded, and during the bonding process, it may also cause poor tightness due to misalignment, affecting the overall optical imaging quality. Therefore, in the imaging optical lens of the present disclosure, there may be an air gap on the optical axis between all adjacent lenses, which can effectively avoid the problems caused by bonded lenses and help to increase the design freedom to improve the imaging quality.

[0118] The imaging optical lens disclosed according to the present disclosure may further include an aperture. The distance on the optical axis from the object-side surface of the first lens to the image-side surface of the third lens is Dr1r6, and the distance on the optical axis from the aperture to the image-side surface of the eighth lens is SD, which satisfies the following conditions: 1.05 < Dr1r6 / SD < 2.00. Thereby, it is possible to assist with the aperture position to control the volume of the imaging optical lens at the object-side end, which helps to achieve a balance between the total length and the aperture configuration. Among them, the following conditions may also be satisfied: 1.10 < Dr1r6 / SD < 1.80. Among them, the following conditions may also be satisfied: 1.29 ≤ Dr1r6 / SD ≤ 1.67.

[0119] The distance between the second lens and the third lens on the optical axis is T23, the distance between the third lens and the fourth lens on the optical axis is T34, and the distance between the fourth lens and the fifth lens on the optical axis is T45, which can satisfy the following conditions: 0.03 < (T23 + T45) / T34 < 5.00. Thus, the configuration of the lens spacing can be adjusted, which helps to guide large-angle light into the imaging surface. Among them, the following conditions can also be satisfied: 0.05 < (T23 + T45) / T34 < 3.80. Among them, the following conditions can also be satisfied: 0.05 < (T23 + T45) / T34 < 1.50. Among them, the following conditions can also be satisfied: 0.12 ≤ (T23 + T45) / T34 ≤ 1.23.

[0120] The Abbe number of the third lens is V3, and the refractive index of the third lens is N3, which can satisfy the following conditions: 17.00 < V3 / N3 < 50.00. Thus, the material configuration of the third lens can be adjusted, which helps to balance the converging ability between light rays of different wavelength bands. Among them, the following conditions can also be satisfied: 19.00 < V3 / N3 < 48.00. Among them, the following conditions can also be satisfied: 22.00 < V3 / N3 < 45.00. Among them, the following conditions can also be satisfied: 36.22 ≤ V3 / N3 ≤ 38.79.

[0121] The radius of curvature of the image-side surface of the first lens is R2, and the radius of curvature of the image-side surface of the eighth lens is R16, which can satisfy the following conditions: -1.00 < R2 / R16 < 1.30. Thus, the surface shape and refractive power of the first lens and the eighth lens can be adjusted to correct astigmatism and field curvature, thereby improving the imaging quality. Among them, the following conditions can also be satisfied: -0.70 < R2 / R16 < 1.00. Among them, the following conditions can also be satisfied: -0.50 < R2 / R16 < 0.85. Among them, the following conditions can also be satisfied: -0.12 ≤ R2 / R16 ≤ 0.57.

[0122] The maximum viewing angle in the imaging optical lens is FOV, which can satisfy the following conditions: 130.0 degrees < FOV < 200.0 degrees. Thus, the optical lens can have a wider viewing angle to expand the application range of the product. Among them, the following conditions can also be satisfied: 140.0 degrees < FOV < 195.0 degrees. Among them, the following conditions can also be satisfied: 145.0 degrees < FOV < 185.0 degrees. Among them, the following conditions can also be satisfied: 153.8 degrees ≤ FOV ≤ 173.04 degrees.

[0123] The distance from the image-side surface of the eighth lens to the imaging surface on the optical axis is BL, and the focal length of the imaging optical lens is f, which can satisfy the following conditions: 0.08 < BL / f < 0.55. Thus, the back focal length can be effectively controlled to avoid excessive overall length. Among them, the following conditions can also be satisfied: 0.13 < BL / f < 0.40.

[0124] The distance from the aperture to the imaging surface on the optical axis is SL, and the distance from the object side surface of the first lens to the imaging surface on the optical axis is TL, which can satisfy the following condition: 0.25 < SL / TL < 0.75. Thereby, it is possible to adjust the aperture position in配合 with a wide-angle lens structure to increase the relative illuminance of the peripheral field of view and achieve a balance among illuminance, depth of field, and imaging size. Among them, the following condition can also be satisfied: 0.28 < SL / TL < 0.62. Among them, the following condition can also be satisfied: 0.30 < SL / TL < 0.55.

[0125] The thickness of the second lens on the optical axis is CT2, and the thickness of the eighth lens on the optical axis is CT8, which can satisfy the following condition: 2.00 < CT2 / CT8 < 10.00. Thereby, it helps to make the second lens have sufficient thickness to receive light rays with a large viewing angle into the imaging optical lens. Among them, the following condition can also be satisfied: 2.30 < CT2 / CT8 < 8.00.

[0126] The distance from the object side surface of the first lens to the imaging surface on the optical axis is TL, the aperture value (F-number) of the imaging optical lens is Fno, and the maximum imaging height of the imaging optical lens (which can be half of the total length of the diagonal of the effective sensing area of the electronic photosensitive element) is ImgH, which can satisfy the following condition: 4.80 < TL×Fno / ImgH < 9.00. Thereby, it helps to achieve a balance among the total length, illuminance, and image size. Among them, the following condition can also be satisfied: 5.70 < TL×Fno / ImgH < 8.50.

[0127] The focal length of the imaging optical lens is f, and the combined focal length of the fifth and sixth lenses is f56, which can satisfy the following condition: -1.50 < f / f56 < -0.30. Thereby, the refractive powers of the fifth and sixth lenses can be coordinated with each other to correct aberrations. Among them, the following condition can also be satisfied: -1.20 < f / f56 < -0.35.

[0128] The radius of curvature of the object side surface of the fourth lens is R7, and the radius of curvature of the image side surface of the fourth lens is R8, which can satisfy the following condition: -2.00 < (R7 + R8) / (R7 - R8) < 2.00. Thereby, the lens shape of the fourth lens can be adjusted, which helps to reduce the aberrations caused by the incidence of light rays with a large viewing angle and at the same time reduce the sensitivity of the imaging optical lens. Among them, the following condition can also be satisfied: -0.70 < (R7 + R8) / (R7 - R8) < 0.70.

[0129] The focal length of the imaging optical lens is f, the focal length of the first lens is f1, the focal length of the fifth lens is f5, and the focal length of the eighth lens is f8, which can satisfy the following conditions: -2.50 < f / f1 + f / f5 + f / f8 < -1.00. Thereby, it helps to balance the refractive power distribution of the imaging optical lens under the specifications of a wide viewing angle and a short overall length. Among them, the following conditions can also be satisfied: -2.20 < f / f1 + f / f5 + f / f8 < -1.20.

[0130] The radius of curvature of the object side surface of the fourth lens is R7, and the radius of curvature of the image side surface of the fourth lens is R8, which can satisfy the following conditions: -4.00 < R7 / R8 < 2.50. Thereby, it helps to correct spherical aberration and coma to improve image clarity. Among them, the following conditions can also be satisfied: -3.50 < R7 / R8 < 2.00.

[0131] The radius of curvature of the object side surface of the first lens is R1, and the radius of curvature of the image side surface of the eighth lens is R16, which can satisfy the following conditions: -2.50 < R1 / R16 < 5.50. Thereby, the incident angle and the exit angle of light in the imaging optical lens can be adjusted, which helps to balance between the viewing angle and the volume distribution. Among them, the following conditions can also be satisfied: -2.00 < R1 / R16 < 4.50.

[0132] The radius of curvature of the object side surface of the second lens is R3, and the radius of curvature of the image side surface of the second lens is R4, which can satisfy the following conditions: 0.10 < R3 / R4 < 25.00. Thereby, the surface shape and refractive power of the second lens can be adjusted to help adjust the optical path of light with a large viewing angle. Among them, the following conditions can also be satisfied: 0.25 < R3 / R4 < 15.50.

[0133] The focal length of the imaging optical lens is f, the focal length of the second lens is f2, and the focal length of the third lens is f3, which can satisfy the following conditions: 0.03 < |f / f2| + |f / f3| < 1.00. Thereby, the refractive power of the second lens and the third lens can be controlled, which helps to balance the convergence or divergence of incident light with a large viewing angle and improve the light-gathering quality of the entire field of view. Among them, the following conditions can also be satisfied: 0.10 < |f / f2| + |f / f3| < 0.90.

[0134] The displacement parallel to the optical axis from the intersection point of the image side surface of the first lens on the optical axis to the position of the maximum effective radius of the image side surface of the first lens is SAG1R2, and the thickness of the first lens on the optical axis is CT1, which can satisfy the following conditions: 1.35 < SAG1R2 / CT1 < 2.50. Thereby, the bending degree of the peripheral surface shape of the image side surface of the first lens can be effectively controlled, which is beneficial to balance between the viewing angle and manufacturability. Among them, the following conditions can also be satisfied: 1.40 < SAG1R2 / CT1 < 2.20. Please refer to Figure 34, which is a schematic diagram showing the parameter SAG1R2 in the first embodiment of the present disclosure, where the displacement value is positive in the image side direction and negative in the object side direction.

[0135] The maximum effective radius of the object side surface of the first lens is Y1R1, and the maximum effective radius of the image side surface of the eighth lens is Y8R2, which can satisfy the following conditions: 1.00 < Y1R1 / Y8R2 < 2.00. Thereby, by adjusting the proportional relationship of the optical effective diameter heights of the first lens and the eighth lens, it is beneficial to achieve a balance between a wide viewing angle and an enlarged imaging surface. Among them, the following conditions can also be satisfied: 1.00 < Y1R1 / Y8R2 < 1.85. Please refer to Figure 34 , which is a schematic diagram showing the parameters Y1R1 and Y8R2 in the first embodiment of the present disclosure.

[0136] The distance parallel to the optical axis between the maximum effective radius position of the object side surface of the third lens and the maximum effective radius position of the image side surface of the third lens is ET3, and the distance parallel to the optical axis between the maximum effective radius position of the object side surface of the sixth lens and the maximum effective radius position of the image side surface of the sixth lens is ET6, which can satisfy the following conditions: 1.60 < ET3 / ET6 < 5.00. Thereby, it helps to control the edge thickness of the lens, thereby improving manufacturability. Among them, the following conditions can also be satisfied: 2.00 < ET3 / ET6 < 4.00. Please refer to Figure 34 , which is a schematic diagram showing the parameters ET3 and ET6 in the first embodiment of the present disclosure.

[0137] The maximum imaging height of the imaging optical lens is ImgH, the maximum effective radius of the object side surface of the first lens is Y1R1, and the maximum effective radius of the object side surface of the fourth lens is Y4R1, which can satisfy the following conditions: 4.50 < ImgH / Y4R1 + Y1R1 / Y4R1 < 16.00. Thereby, it is beneficial to reduce the volume while maintaining a relatively wide shooting field of view and a large imaging range, and at the same time increase the flexibility of the mechanism space configuration. Among them, the following conditions can also be satisfied: 6.00 < ImgH / Y4R1 + Y1R1 / Y4R1 < 14.50. Please refer to Figure 34 , which is a schematic diagram showing the parameters Y1R1 and Y4R1 in the first embodiment of the present disclosure.

[0138] The focal length of the fifth lens is f5, and the focal length of the eighth lens is f8, which can satisfy the following conditions: -1.0 < f5 / f8 < 3.00. Thereby, the refractive power configuration of the fifth lens and the eighth lens can be adjusted, which helps to correct aberration, improve astigmatism and adjust the viewing angle. Among them, the following conditions can also be satisfied: -0.5 < f5 / f8 < 2.80. Among them, the following conditions can also be satisfied: 0.00 < f5 / f8 < 2.50.

[0139] The radius of curvature of the image-side surface of the second lens is R4, and the radius of curvature of the object-side surface of the eighth lens is R15, which can satisfy the following conditions: -1.00 < R15 / R4 < 20.00. Thereby, the radius of curvature of the image-side surface of the second lens and the radius of curvature of the object-side surface of the eighth lens can cooperate with each other to improve distortion and field curvature. Among them, the following conditions can also be satisfied: 0.00 < R15 / R4 < 15.00.

[0140] The focal length of the imaging optical lens is f, and the focal length of the sixth lens is f6, which can satisfy the following conditions: -0.50 < f / f6 < 0.30. Thereby, the sixth lens can be used as a correction lens, which helps to improve image contrast and recognition, and enhance imaging quality. Among them, the following conditions can also be satisfied: -0.30 < f / f6 < 0.20.

[0141] The radius of curvature of the object-side surface of the eighth lens is R15, and the radius of curvature of the image-side surface of the eighth lens is R16, which can satisfy the following conditions: -7.50 < (R15 + R16) / (R15 - R16) < 1.50. Thereby, the surface shape design of the eighth lens can be standardized, achieving the effects of reducing distortion, shortening the back focal length, and simultaneously reducing the sensitivity of the imaging optical lens. Among them, the following conditions can also be satisfied: -5.60 < (R15 + R16) / (R15 - R16) < 1.00. Among them, the following conditions can also be satisfied: -3.10 < (R15 + R16) / (R15 - R16) < 0.80.

[0142] The thickness of the second lens on the optical axis is CT2, the thickness of the third lens on the optical axis is CT3, the thickness of the fourth lens on the optical axis is CT4, the thickness of the fifth lens on the optical axis is CT5, the thickness of the sixth lens on the optical axis is CT6, the thickness of the seventh lens on the optical axis is CT7, and the thickness of the eighth lens on the optical axis is CT8, which can satisfy the following conditions: 0.70 < (CT2 + CT3) / (CT4 + CT5 + CT6 + CT7 + CT8) < 1.80. Thereby, the lens distribution can be adjusted to facilitate the formation of a miniaturized wide-angle lens structure to meet more diverse product applications. Among them, the following conditions can also be satisfied: 0.82 < (CT2 + CT3) / (CT4 + CT5 + CT6 + CT7 + CT8) < 1.70.

[0143] The radius of curvature of the image-side surface of the first lens is R2, and the radius of curvature of the object-side surface of the seventh lens is R13, which can satisfy the following conditions: -0.10 < R2 / R13 < 2.00. Thereby, the radius of curvature of the image-side surface of the first lens and the radius of curvature of the object-side surface of the seventh lens can cooperate with each other, which helps to reconcile the optical path and correct astigmatism and magnification chromatic aberration. Among them, the following conditions can also be satisfied: 0.15 < R2 / R13 < 1.80. Among them, the following conditions can also be satisfied: 0.20 < R2 / R13 < 1.55.

[0144] The maximum imaging height of the imaging optical lens is ImgH, and the distance on the optical axis from the object side surface of the first lens to the image side surface of the eighth lens is TD, which can satisfy the following condition: 0.50 < 2×ImgH / TD < 1.10. Thereby, a balance can be achieved between the image size and the volume of the imaging optical lens. Among them, the following condition can also be satisfied: 0.56 < 2×ImgH / TD < 1.00.

[0145] The maximum effective radius of the image side surface of the fifth lens is Y5R2, the maximum effective radius of the object side surface of the sixth lens is Y6R1, the maximum effective radius of the image side surface of the sixth lens is Y6R2, and the maximum effective radius of the object side surface of the seventh lens is Y7R1, which can satisfy the following condition: 2.30 < Y7R1 / Y6R2 + Y6R1 / Y5R2 < 4.00. Thereby, it is beneficial to compress the volume of the imaging optical lens under the wide-angle specification. Among them, the following condition can also be satisfied: 2.50 < Y7R1 / Y6R2 + Y6R1 / Y5R2 < 3.20. Please refer to Figure 34 , which is a schematic diagram showing the parameters Y5R2, Y6R1, Y6R2, and Y7R1 in the first embodiment of the present disclosure.

[0146] The vertical distance between the critical point closest to the optical axis at the off-axis position on the object side surface of the seventh lens and the optical axis is Yc71, and the vertical distance between the inflection point closest to the optical axis on the object side surface of the eighth lens and the optical axis is Yi81, which can satisfy the following condition: 0.65 < Yc71 / Yi81 < 1.40. Thereby, the seventh lens and the eighth lens can cooperate with each other to adjust the light deflection angle in the peripheral area, which helps to improve the image quality of the wide-angle field light and the response efficiency of the electronic photosensitive element. Please refer to Figure 33 , which is a schematic diagram showing the parameters Yc71 and Yi81 in the first embodiment of the present disclosure. Figure 33 Illustrate the critical point C on the object side surface of the seventh lens in the first embodiment of the present disclosure, together with the critical points C on the object side surface of the third lens E3, the object side surface of the sixth lens E6, the image side surface of the sixth lens E6, the image side surface of the seventh lens E7, and the image side surface of the eighth lens E8. As an exemplary illustration, in each embodiment of the present disclosure, each lens surface can have one or more critical points.

[0147] The distance parallel to the optical axis between the maximum effective radius position of the object side surface of the first lens and the maximum effective radius position of the image side surface of the first lens is ET1, and the thickness of the first lens on the optical axis is CT1, which can satisfy the following condition: 1.10 < ET1 / CT1 < 2.20. Thereby, the ratio of the edge thickness to the center thickness of the first lens can be controlled, so that the first lens has sufficient edge thickness to adjust the light deflection angle of the large viewing angle, and at the same time ensure the formability of the lens. Please refer to Figure 34 This is a schematic diagram illustrating parameter ET1 according to the first embodiment of this disclosure.

[0148] The various technical features of the imaging optical lens disclosed in this disclosure can be combined and configured to achieve the corresponding effects.

[0149] In the imaging optical lens disclosed in this invention, the lens material can be glass or plastic. If the lens is made of glass, the freedom of refractive power configuration of the imaging optical lens can be increased, and the influence of external environmental temperature changes on imaging can be reduced. Glass lenses can be manufactured using techniques such as grinding or molding. If the lens is made of plastic, production costs can be effectively reduced. Furthermore, spherical (SPH) or aspherical (ASP) surfaces can be incorporated into the lens surface. Spherical lenses reduce manufacturing difficulty, while aspherical surfaces provide more controllable variables to reduce aberrations, decrease the number of lenses, and effectively reduce the overall length of the imaging optical lens disclosed in this invention. Further, aspherical surfaces can be manufactured using methods such as plastic injection molding or molding glass lenses.

[0150] In the imaging optical lens disclosed in this disclosure, if the lens surface is aspherical, it means that all or part of the optically effective area of ​​the lens surface is aspherical.

[0151] In the imaging optical lens disclosed herein, additives can be selectively added to any (or more) lens materials to produce light absorption or interference effects, thereby altering the lens's transmittance for specific wavelengths of light and reducing stray light and color shift. For example, the additives may filter out light in the 600 nm to 800 nm wavelength range to help reduce excess red or infrared light; or they may filter out light in the 350 nm to 450 nm wavelength range to reduce excess blue or ultraviolet light. Therefore, the additives can prevent specific wavelengths of light from interfering with imaging. Furthermore, the additives can be uniformly mixed into a plastic material and manufactured into a lens using injection molding technology. Additionally, the additives can also be deposited on the lens surface as a coating to provide the aforementioned effects.

[0152] In the imaging optical lens disclosed in this disclosure, if the lens surface is convex and the position of the convex surface is not defined, it means that the convex surface can be located near the optical axis of the lens surface; if the lens surface is concave and the position of the concave surface is not defined, it means that the concave surface can be located near the optical axis of the lens surface. If the refractive power or focal length of the lens is not defined in its region, 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.

[0153] In the imaging optical lens disclosed herein, the inflection point of the lens surface refers to the boundary point where the curvature of the lens surface changes from positive to negative. The critical point of the lens surface refers to the point of tangency on the tangent line between a plane perpendicular to the optical axis and the lens surface, and the critical point is not located on the optical axis.

[0154] In the imaging optical lens disclosed herein, the imaging surface of the imaging optical lens can be a plane or a curved surface with any curvature, depending on the corresponding electronic photosensitive element, especially a curved surface with a concave surface facing the object side.

[0155] In the imaging optical lens disclosed herein, one or more imaging correction elements (such as planar elements) can be selectively disposed between the lens closest to the imaging plane and the imaging plane in the imaging optical path to achieve the effect of correcting image curvature (such as image distortion). The optical properties of the 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 imaging device. Generally, a preferred configuration of the imaging correction element is to place a thin plano-concave element with a concave surface in the object-side direction close to the imaging plane.

[0156] In the imaging optical lens disclosed herein, at least one element with a deflecting optical path function, such as a prism or a mirror, may be selectively disposed between the subject and the imaging plane in the imaging optical path. The surface of the prism or mirror may be a plane, spherical, aspherical, or freeform surface, etc., to provide a more flexible spatial configuration for the imaging optical lens, allowing the thinning of electronic devices to be unrestricted by the total optical length of the imaging optical lens. For further explanation, please refer to... Figure 35 and Figure 36 ,in Figure 35 This is a schematic diagram illustrating an arrangement of an optical path reversing element in an imaging optical lens according to the present disclosure, and Figure 36 This is a schematic diagram illustrating another configuration of an optical path reversing element according to this disclosure in an imaging optical lens. For example... Figure 35 and Figure 36 As shown, the imaging optical lens can travel along the optical path from the subject (not shown) to the imaging plane IMG, and sequentially has a first optical axis OA1, an optical path deflection element LF, and a second optical axis OA2, wherein the optical path deflection element LF can be as follows: Figure 35 The image shown is positioned between the subject and the lens group LG of the image-capturing optical lens, or as... Figure 36 The diagram shows the lens group LG positioned between the imaging optical lens and the imaging plane IMG. Please also refer to... Figure 37 This is a schematic diagram illustrating one configuration of two optical path deflection elements in an imaging optical lens according to the present disclosure, such as... Figure 37As shown, the imaging optical lens can also travel along the light path from the subject (not shown) to the imaging plane IMG, and sequentially includes a first optical axis OA1, a first optical path reversing element LF1, a second optical axis OA2, a second optical path reversing element LF2, and a third optical axis OA3. The first optical path reversing element LF1 is positioned between the subject and the lens group LG of the imaging optical lens, and the second optical path reversing element LF2 is positioned between the lens group LG of the imaging optical lens and the imaging plane IMG. Furthermore, the direction of light travel along the first optical axis OA1 can be as follows: Figure 37 The direction shown is the same as the direction of light travel along the third optical axis OA3. The imaging optical lens may also be optionally configured with more than three optical path deflection elements; this disclosure is not limited to the type, number, and position of the optical path deflection elements shown in the accompanying drawings.

[0157] The imaging optical lens disclosed herein may be provided with at least one aperture stop, which may be located before the first lens, between the lenses, or after the last lens. The aperture stop may be of the type such as a glare stop or a field stop, which can be used to reduce stray light and help improve image quality.

[0158] In the imaging optical lens disclosed in this invention, the aperture can be configured as a front aperture or a center aperture. A front aperture means the aperture is positioned between the subject and the first lens, while a center aperture means the aperture is positioned between the first lens and the imaging plane. A front aperture allows for a longer distance between the exit pupil and the imaging plane, resulting in a telecentric effect and increasing the efficiency of image reception by the CCD or CMOS sensor. A center aperture helps to widen the field of view of the imaging optical lens.

[0159] This disclosure may appropriately incorporate a variable aperture element, which can be a mechanical component or a light-regulating element, capable of electrically or signal-controlled aperture size and shape. The mechanical component may include movable parts such as blade assemblies or shielding plates; the light-regulating element may include masking materials such as filter elements, electrochromic materials, or liquid crystal layers. The variable aperture element can enhance image adjustment capabilities by controlling the amount of light entering the image or the exposure time. Furthermore, the variable aperture element can also be the aperture of this disclosure, allowing adjustment of image quality, such as depth of field or exposure speed, by changing the aperture value.

[0160] This disclosure allows for the appropriate placement of one or more optical elements to restrict the form of light passing through the imaging optical lens. These optical elements may be filters, polarizers, etc., but this disclosure is not limited thereto. Furthermore, the optical elements may be monolithic elements, composite components, or thin films, but this disclosure is not limited thereto. The optical elements can be placed between the object end, image end, or lens of the imaging optical lens to control the passage of specific forms of light, thereby meeting application requirements.

[0161] The imaging optical lens disclosed herein may include at least one optical lens, optical element, or carrier, at least one surface of which has a low-reflection layer, which can effectively reduce stray light generated by light reflection at the interface. The low-reflection layer may be disposed in the non-effective area of ​​the object-side surface or image-side surface of the optical lens, or on the connecting surface between the object-side surface and the image-side surface; the optical element may be a light-shielding element, an annular spacer element, a lens barrel element, a cover glass, blue glass, a filter element (color filter), a light path deflection element (reflective element), a prism, or a mirror, etc.; the carrier may be a lens mount, a microlens disposed on the photosensitive element, the periphery of the photosensitive element substrate, or a glass sheet used to protect the photosensitive element, etc.

[0162] In the imaging optical lens disclosed herein, the object side and image side are determined according to the optical axis direction, and the data on the optical axis are calculated along the optical axis. Furthermore, if the optical axis is deflected by an optical path deflection element, the data on the optical axis are also calculated along the optical axis.

[0163] Based on the above implementation methods, specific embodiments are presented below and described in detail with reference to the accompanying drawings.

[0164] <First Embodiment>

[0165] Please refer to Figures 1 to 2 ,in Figure 1 A schematic diagram of an image-capturing device according to a first embodiment of this disclosure is shown. Figure 2 From left to right, the graphs show the spherical aberration, astigmatism, and distortion curves of the first embodiment. Figure 1It is known that the image capturing device 1 includes an image capturing optical lens (not otherwise labeled) and an electronic image sensor IS. The image capturing optical lens, along the optical path from the object side to the image side, sequentially includes a first lens E1, a second lens E2, an aperture stop S1, a third lens E3, an aperture ST, a fourth lens E4, an aperture stop S2, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, a filter element E9, and an imaging surface IMG. The electronic image sensor IS is disposed on the imaging surface IMG. The image capturing optical lens comprises eight lenses (E1, E2, E3, E4, E5, E6, E7, E8), and there are no other interposed lenses between each lens. Furthermore, all adjacent lenses in the eight lenses of the image capturing optical lens have an air gap along the optical axis.

[0166] The first lens E1 has negative refractive power and is made of glass. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are spherical.

[0167] The second lens E2 has positive refractive power and is made of plastic. Its object-side surface is concave near the optical axis, and its image-side surface is convex near the optical axis. Both surfaces are aspherical, and its image-side surface has a point of inflection.

[0168] The third lens E3 has positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is also convex near the optical axis. Both surfaces are aspherical. Its object-side surface has a point of inflection and a critical point off-axis.

[0169] The fourth lens E4 has positive refractive power and is made of glass. Its object-side surface is convex near the optical axis, and its image-side surface is convex near the optical axis. Both of its surfaces are aspherical.

[0170] The fifth lens, E5, has negative refractive power and is made of plastic. Its object-side surface is concave near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are aspherical.

[0171] The sixth lens E6 has negative refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are aspherical. Its object-side surface has a point of inflection, its image-side surface has a point of inflection, its object-side surface has a critical point off-axis, and its image-side surface has a critical point off-axis.

[0172] The seventh lens E7 has positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are aspherical. Its object-side surface has two inflection points, and its image-side surface has two inflection points. Its object-side surface has a critical point off-axis, and its image-side surface has a critical point off-axis.

[0173] The eighth lens E8 has negative refractive power and is made of plastic. Its object-side surface is concave near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are aspherical. Its object-side surface has two inflection points, its image-side surface has three inflection points, and its image-side surface has a critical point off-axis.

[0174] The filter element E9 is made of glass and is located between the eighth lens E8 and the imaging surface IMG. It does not affect the focal length of the imaging optical lens.

[0175] The equations for the aspherical surfaces of the above lenses are expressed as follows:

[0176]

[0177] X: The displacement parallel to the optical axis from the intersection of the aspherical surface and the optical axis to a point on the aspherical surface at a distance Y from the optical axis;

[0178] Y: The perpendicular distance between a point on the aspherical curve and the optical axis;

[0179] R: Radius of curvature;

[0180] k: cone coefficient; and

[0181] Ai: The i-th order aspherical coefficient.

[0182] In the imaging optical lens of the first embodiment, the focal length of the imaging optical lens is f, the aperture value of the imaging optical lens is Fno, and half of the maximum angle of view in the imaging optical lens is HFOV, with the following values: f = 3.71 mm, Fno = 2.75, HFOV = 80.5 degrees.

[0183] The maximum field of view (FOV) in an imaging optical lens satisfies the following condition: FOV = 161.0 degrees.

[0184] The distance on the optical axis from the object-side surface of the first lens E1 to the imaging plane IMG is TL, the aperture value of the imaging optical lens is Fno, and the maximum imaging height of the imaging optical lens is ImgH, which satisfies the following condition: TL×Fno / ImgH=8.16.

[0185] The maximum imaging height of the imaging optical lens is ImgH, and the distance on the optical axis from the object-side surface of the first lens E1 to the image-side surface of the eighth lens E8 is TD, which satisfies the following condition: 2×ImgH / TD=0.71.

[0186] The distance from the image-side surface of the eighth lens E8 to the imaging plane IMG on the optical axis is BL, and the focal length of the imaging optical lens is f, which satisfies the following condition: BL / f = 0.25.

[0187] The focal length of the imaging optical lens is f, and the focal length of the sixth lens E6 is f6, which satisfies the following condition: f / f6=-0.10.

[0188] The focal length of the fifth lens E5 is f5, and the focal length of the eighth lens E8 is f8. They satisfy the following condition: f5 / f8 = 0.78.

[0189] The focal length of the imaging optical lens is f, and the combined focal length of the fifth lens E5 and the sixth lens E6 is f56, which satisfies the following condition: f / f56=-0.82.

[0190] The focal length of the imaging optical lens is f, the focal length of the second lens E2 is f2, and the focal length of the third lens E3 is f3. They satisfy the following condition: |f / f2|+|f / f3|=0.45.

[0191] The focal length of the imaging optical lens is f, the focal length of the first lens E1 is f1, the focal length of the fifth lens E5 is f5, and the focal length of the eighth lens E8 is f8. They satisfy the following condition: f / f1 + f / f5 + f / f8 = -1.72.

[0192] The distance from the aperture ST to the imaging plane IMG on the optical axis is SL, and the distance from the object-side surface of the first lens E1 to the imaging plane IMG on the optical axis is TL. They satisfy the following condition: SL / TL = 0.39.

[0193] The distance on the optical axis from the object-side surface of the first lens E1 to the image-side surface of the third lens E3 is Dr1r6, and the distance on the optical axis from the aperture ST to the image-side surface of the eighth lens E8 is SD, which satisfies the following condition: Dr1r6 / SD=1.65.

[0194] The thickness of the second lens E2 on the optical axis is CT2, and the thickness of the eighth lens E8 on the optical axis is CT8, which satisfies the following condition: CT2 / CT8 = 5.21.

[0195] The optical axis spacing between the second lens E2 and the third lens E3 is T23, the optical axis spacing between the third lens E3 and the fourth lens E4 is T34, and the optical axis spacing between the fourth lens E4 and the fifth lens E5 is T45, satisfying the following condition: (T23+T45) / T34=0.12. In this embodiment, the optical axis spacing between two adjacent lenses refers to the optical axis distance between two adjacent mirror surfaces of the two adjacent lenses.

[0196] The thickness of the second lens E2 on the optical axis is CT2, the thickness of the third lens E3 on the optical axis is CT3, the thickness of the fourth lens E4 on the optical axis is CT4, the thickness of the fifth lens E5 on the optical axis is CT5, the thickness of the sixth lens E6 on the optical axis is CT6, the thickness of the seventh lens E7 on the optical axis is CT7, and the thickness of the eighth lens E8 on the optical axis is CT8. They satisfy the following condition: (CT2+CT3) / (CT4+CT5+CT6+CT7+CT8)=1.40.

[0197] The radius of curvature of the object-side surface of the first lens E1 is R1, and the radius of curvature of the image-side surface of the eighth lens E8 is R16, which satisfies the following condition: R1 / R16=0.02.

[0198] The radius of curvature of the image-side surface of the first lens E1 is R2, and the radius of curvature of the image-side surface of the eighth lens E8 is R16, which satisfies the following condition: R2 / R16=0.01.

[0199] The radius of curvature of the image-side surface of the first lens E1 is R2, and the radius of curvature of the object-side surface of the seventh lens E7 is R13, which satisfies the following condition: R2 / R13=0.96.

[0200] The radius of curvature of the object-side surface of the second lens E2 is R3, and the radius of curvature of the image-side surface of the second lens E2 is R4, which satisfies the following condition: R3 / R4 = 3.36.

[0201] The radius of curvature of the image-side surface of the second lens E2 is R4, and the radius of curvature of the object-side surface of the eighth lens E8 is R15, which satisfies the following condition: R15 / R4=0.54.

[0202] The radius of curvature of the object-side surface of the fourth lens E4 is R7, and the radius of curvature of the image-side surface of the fourth lens E4 is R8, which satisfies the following condition: R7 / R8=-0.60.

[0203] The radius of curvature of the object-side surface of the fourth lens E4 is R7, and the radius of curvature of the image-side surface of the fourth lens E4 is R8, which satisfies the following condition: (R7+R8) / (R7-R8)=-0.25.

[0204] The radius of curvature of the object-side surface of the eighth lens E8 is R15, and the radius of curvature of the image-side surface of the eighth lens E8 is R16, which satisfies the following condition: (R15+R16) / (R15-R16)=-0.99.

[0205] The Abbe number of the third lens E3 is V3, and the refractive index of the third lens E3 is N3, which satisfies the following condition: V3 / N3 = 37.23.

[0206] The distance parallel to the optical axis between the maximum effective radius position of the object-side surface of the first lens E1 and the maximum effective radius position of the image-side surface of the first lens E1 is ET1, and the thickness of the first lens E1 on the optical axis is CT1, which satisfies the following condition: ET1 / CT1=1.46.

[0207] The distance parallel to the optical axis between the maximum effective radius position of the object-side surface of the third lens E3 and the maximum effective radius position of the image-side surface of the third lens E3 is ET3. The distance parallel to the optical axis between the maximum effective radius position of the object-side surface of the sixth lens E6 and the maximum effective radius position of the image-side surface of the sixth lens E6 is ET6. The following condition is satisfied: ET3 / ET6=3.76.

[0208] The displacement parallel to the optical axis from the intersection of the image-side surface of the first lens E1 and the optical axis to the position of the maximum effective radius of the image-side surface of the first lens E1 is SAG1R2. The thickness of the first lens E1 on the optical axis is CT1, which satisfies the following condition: SAG1R2 / CT1 = 2.00. In this embodiment, the direction of SAG1R2 points towards the image side, so the value is positive.

[0209] The vertical distance between the critical point on the object-side surface of the seventh lens E7, closest to the optical axis, and the optical axis is Yc71. The vertical distance between the inflection point on the object-side surface of the eighth lens E8, closest to the optical axis, and the optical axis is Yi81. They satisfy the following condition: Yc71 / Yi81=0.85.

[0210] The maximum imaging height of the imaging optical lens is ImgH, the maximum effective radius of the object-side surface of the first lens E1 is Y1R1, and the maximum effective radius of the object-side surface of the fourth lens E4 is Y4R1. They satisfy the following condition: ImgH / Y4R1+Y1R1 / Y4R1=11.19.

[0211] The maximum effective radius of the object-side surface of the first lens E1 is Y1R1, and the maximum effective radius of the image-side surface of the eighth lens E8 is Y8R2, which satisfies the following condition: Y1R1 / Y8R2=1.41.

[0212] The maximum effective radius of the image-side surface of the fifth lens E5 is Y5R2, the maximum effective radius of the object-side surface of the sixth lens E6 is Y6R1, the maximum effective radius of the image-side surface of the sixth lens E6 is Y6R2, and the maximum effective radius of the object-side surface of the seventh lens E7 is Y7R1. They satisfy the following condition: Y7R1 / Y6R2+Y6R1 / Y5R2=2.84.

[0213] Please refer to Table 1A and Table 1B below.

[0214]

[0215]

[0216]

[0217]

[0218] Table 1A is... Figure 1 The first embodiment provides detailed structural data, where the units for radius of curvature, thickness, and focal length are millimeters (mm), and surfaces 0 to 22 sequentially represent surfaces from the object side to the image side. Table 1B shows the aspherical data in the first embodiment, where k is the conic coefficient in the aspherical curve equation, and A4 to A28 represent the 4th to 28th 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 1A and 1B of the first embodiment, and will not be repeated here.

[0219] <Second Embodiment>

[0220] Please refer to Figures 3 to 4 ,in Figure 3 A schematic diagram of an image-capturing device according to a second embodiment of this disclosure is shown. Figure 4 From left to right, the graphs show the spherical aberration, astigmatism, and distortion curves of the second embodiment. Figure 3 It is known that the image capturing device 2 includes an image capturing optical lens (not otherwise labeled) and an electronic image sensor IS. The image capturing optical lens, along the optical path from the object side to the image side, sequentially includes a first lens E1, a second lens E2, an aperture stop S1, a third lens E3, an aperture ST, a fourth lens E4, an aperture stop S2, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, a filter element E9, and an imaging surface IMG. The electronic image sensor IS is disposed on the imaging surface IMG. The image capturing optical lens comprises eight lenses (E1, E2, E3, E4, E5, E6, E7, E8), and there are no other interposed lenses between each lens. Furthermore, all adjacent lenses in the eight lenses of the image capturing optical lens have an air gap along the optical axis.

[0221] The first lens E1 has negative refractive power and is made of glass. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are spherical.

[0222] The second lens E2 has positive refractive power and is made of plastic. Its object-side surface is concave near the optical axis, and its image-side surface is convex near the optical axis. Both of its surfaces are aspherical.

[0223] The third lens E3 has positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both surfaces are aspherical. Its object-side surface has one inflection point, and its image-side surface has two inflection points.

[0224] The fourth lens E4 has positive refractive power and is made of glass. Its object-side surface is convex near the optical axis, and its image-side surface is convex near the optical axis. Both of its surfaces are aspherical.

[0225] The fifth lens E5 has negative refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are aspherical. Its object-side surface has a point of inflection, its image-side surface has a point of inflection, and its object-side surface has a critical point off-axis.

[0226] The sixth lens E6 has negative refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are aspherical. Its object-side surface has one inflection point, and its image-side surface has three inflection points. Its object-side surface has a critical point off-axis, and its image-side surface has a critical point off-axis.

[0227] The seventh lens E7 has positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both surfaces are aspherical. Its object-side surface has two inflection points, and its image-side surface has one inflection point. Its object-side surface has a critical point off-axis, and its image-side surface has a critical point off-axis.

[0228] The eighth lens E8 has negative refractive power and is made of plastic. Its object-side surface is concave near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are aspherical. Its object-side surface has two inflection points, its image-side surface has three inflection points, and its image-side surface has a critical point off-axis.

[0229] The filter element E9 is made of glass and is located between the eighth lens E8 and the imaging surface IMG. It does not affect the focal length of the imaging optical lens.

[0230] Please refer to Table 2A and Table 2B below.

[0231]

[0232]

[0233]

[0234]

[0235] In the second embodiment, the equation for the aspherical curve is expressed as in the first embodiment. Furthermore, the definitions in Table 2C are the same as in the first embodiment and will not be repeated here.

[0236]

[0237]

[0238] <Third Embodiment>

[0239] Please refer to Figures 5 to 6 ,in Figure 5 A schematic diagram of an image-capturing device according to a third embodiment of this disclosure is shown. Figure 6 From left to right, the graphs show the spherical aberration, astigmatism, and distortion curves of the third embodiment. Figure 5 It is known that the image capturing device 3 includes an image capturing optical lens (not otherwise labeled) and an electronic image sensor IS. The image capturing optical lens, along the optical path from the object side to the image side, sequentially includes a first lens E1, a second lens E2, an aperture stop S1, a third lens E3, an aperture ST, a fourth lens E4, an aperture stop S2, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, a filter element E9, and an imaging surface IMG. The electronic image sensor IS is disposed on the imaging surface IMG. The image capturing optical lens comprises eight lenses (E1, E2, E3, E4, E5, E6, E7, E8), and there are no other interposed lenses between each lens. Furthermore, all adjacent lenses in the eight lenses of the image capturing optical lens have an air gap along the optical axis.

[0240] The first lens E1 has negative refractive power and is made of glass. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are spherical.

[0241] The second lens E2 has positive refractive power and is made of plastic. Its object-side surface is concave near the optical axis, and its image-side surface is convex near the optical axis. Both surfaces are aspherical, and its image-side surface has a point of inflection.

[0242] The third lens E3 has positive refractive power and is made of plastic. Its object-side surface is concave near the optical axis, and its image-side surface is convex near the optical axis. Both of its surfaces are aspherical. Its object-side surface has a point of inflection, and its image-side surface also has a point of inflection.

[0243] The fourth lens E4 has positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is convex near the optical axis. Both of its surfaces are aspherical.

[0244] The fifth lens, E5, has negative refractive power and is made of plastic. Its object-side surface is concave near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are aspherical.

[0245] The sixth lens E6 has positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are aspherical. Its object-side surface has a point of inflection, its image-side surface has a point of inflection, and its object-side surface has a critical point off-axis.

[0246] The seventh lens E7 has positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is convex near the optical axis. Both of its surfaces are aspherical. Its object-side surface has two inflection points, its image-side surface has three inflection points, and its object-side surface has a critical point off-axis.

[0247] The eighth lens E8 has negative refractive power and is made of plastic. Its object-side surface is concave near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are aspherical. Its object-side surface has two inflection points, its image-side surface has three inflection points, and its image-side surface has a critical point off-axis.

[0248] The filter element E9 is made of glass and is located between the eighth lens E8 and the imaging surface IMG. It does not affect the focal length of the imaging optical lens.

[0249] Please refer to Table 3A and Table 3B below.

[0250]

[0251]

[0252]

[0253]

[0254] In the third embodiment, the equation for the aspherical curve is expressed as in the first embodiment. Furthermore, the definitions in Table 3C are the same as in the first embodiment and will not be repeated here.

[0255]

[0256]

[0257] <Fourth Embodiment>

[0258] Please refer to Figures 7 to 8 ,in Figure 7 A schematic diagram of an image-capturing device according to the fourth embodiment of this disclosure is shown. Figure 8From left to right, the graphs show the spherical aberration, astigmatism, and distortion curves of the fourth embodiment. Figure 7 It is known that the image capturing device 4 includes an image capturing optical lens (not otherwise labeled) and an electronic image sensor IS. The image capturing optical lens, along the optical path from the object side to the image side, sequentially includes a first lens E1, a second lens E2, an aperture stop S1, a third lens E3, an aperture ST, a fourth lens E4, an aperture stop S2, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, a filter element E9, and an imaging surface IMG. The electronic image sensor IS is disposed on the imaging surface IMG. The image capturing optical lens comprises eight lenses (E1, E2, E3, E4, E5, E6, E7, E8), and there are no other interposed lenses between each lens. Furthermore, all adjacent lenses in the eight lenses of the image capturing optical lens have an air gap along the optical axis.

[0259] The first lens E1 has negative refractive power and is made of glass. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are spherical.

[0260] The second lens E2 has positive refractive power and is made of plastic. Its object-side surface is concave near the optical axis, and its image-side surface is convex near the optical axis. Both surfaces are aspherical, and its image-side surface has a point of inflection.

[0261] The third lens E3 has positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is convex near the optical axis. Both surfaces are aspherical, and its object-side surface has two inflection points.

[0262] The fourth lens E4 has positive refractive power and is made of glass. Its object-side surface is convex near the optical axis, and its image-side surface is convex near the optical axis. Both of its surfaces are aspherical, and its object-side surface has a point of inflection.

[0263] The fifth lens E5 has negative refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are aspherical. Its object-side surface has a point of inflection, its image-side surface has a point of inflection, and its object-side surface has a critical point off-axis.

[0264] The sixth lens E6 has positive refractive power and is made of plastic. Its object-side surface is concave near the optical axis, and its image-side surface is convex near the optical axis. Both surfaces are aspherical, and its image-side surface has two inflection points.

[0265] The seventh lens E7 has positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both surfaces are aspherical. Its object-side surface has two inflection points, and its image-side surface has one inflection point. Its object-side surface has a critical point off-axis, and its image-side surface has a critical point off-axis.

[0266] The eighth lens E8 has negative refractive power and is made of plastic. Its object-side surface is concave near the optical axis, and its image-side surface is convex near the optical axis. Both surfaces are aspherical. Its object-side surface has two inflection points, and its image-side surface has four inflection points.

[0267] The filter element E9 is made of glass and is located between the eighth lens E8 and the imaging surface IMG. It does not affect the focal length of the imaging optical lens.

[0268] Please refer to Table 4A and Table 4B below.

[0269]

[0270]

[0271]

[0272]

[0273] In the fourth embodiment, the equation for the aspherical curve is expressed as in the first embodiment. Furthermore, the definitions in Table 4C are the same as in the first embodiment and will not be repeated here.

[0274]

[0275] <Fifth Embodiment>

[0276] Please refer to Figures 9 to 10 ,in Figure 9 A schematic diagram of an image-capturing device according to the fifth embodiment of this disclosure is shown. Figure 10 From left to right, the graphs show the spherical aberration, astigmatism, and distortion curves of the fifth embodiment. Figure 9It is known that the image capturing device 5 includes an image capturing optical lens (not otherwise labeled) and an electronic image sensor IS. The image capturing optical lens, along the optical path from the object side to the image side, sequentially includes a first lens E1, a second lens E2, an aperture stop S1, a third lens E3, an aperture ST, a fourth lens E4, an aperture stop S2, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, a filter element E9, and an imaging surface IMG. The electronic image sensor IS is disposed on the imaging surface IMG. The image capturing optical lens comprises eight lenses (E1, E2, E3, E4, E5, E6, E7, E8), and there are no other interposed lenses between each lens. Furthermore, all adjacent lenses in the eight lenses of the image capturing optical lens have an air gap along the optical axis.

[0277] The first lens E1 has negative refractive power and is made of glass. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are spherical.

[0278] The second lens E2 has negative refractive power and is made of plastic. Its object-side surface is concave near the optical axis, and its image-side surface is convex near the optical axis. Both of its surfaces are aspherical.

[0279] The third lens E3 has positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both surfaces are aspherical. Its image-side surface has two inflection points, and its image-side surface has a critical point off-axis.

[0280] The fourth lens E4 has positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is convex near the optical axis. Both of its surfaces are aspherical.

[0281] The fifth lens E5 has negative refractive power and is made of plastic. Its object-side surface is concave near the optical axis, and its image-side surface is concave near the optical axis. Both surfaces are aspherical, and its image-side surface has a point of inflection.

[0282] The sixth lens E6 has negative refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are aspherical. Its object-side surface has a point of inflection, its image-side surface has a point of inflection, its object-side surface has a critical point off-axis, and its image-side surface has a critical point off-axis.

[0283] The seventh lens E7 has positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are aspherical. Its object-side surface has a point of inflection, its image-side surface has a point of inflection, its object-side surface has a critical point off-axis, and its image-side surface has a critical point off-axis.

[0284] The eighth lens, E8, has negative refractive power and is made of plastic. Its object-side surface is concave near the optical axis, and its image-side surface is concave near the optical axis. Both surfaces are aspherical. Its object-side surface has two inflection points, and its image-side surface has three inflection points. Its object-side surface has two critical points off-axis, and its image-side surface has one critical point off-axis.

[0285] The filter element E9 is made of glass and is located between the eighth lens E8 and the imaging surface IMG. It does not affect the focal length of the imaging optical lens.

[0286] Please refer to Table 5A and Table 5B below.

[0287]

[0288]

[0289]

[0290]

[0291] In the fifth embodiment, the equation for the aspherical curve is expressed as in the first embodiment. Furthermore, the definitions in Table 5C are the same as in the first embodiment and will not be repeated here.

[0292]

[0293] <Sixth Embodiment>

[0294] Please refer to Figures 11 to 12 ,in Figure 11 A schematic diagram of an image-capturing device according to the sixth embodiment of this disclosure is shown. Figure 12 From left to right, the graphs show the spherical aberration, astigmatism, and distortion curves of the sixth embodiment. Figure 11 It is known that the image capturing device 6 includes an image capturing optical lens (not otherwise labeled) and an electronic photosensitive element IS. The image capturing optical lens, along the optical path from the object side to the image side, sequentially includes a first lens E1, a second lens E2, an aperture stop S1, and a third lens E3.

[0295] The imaging optical lens comprises an aperture ST, a fourth lens E4, an aperture stop S2, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, a filter element E9, and an imaging plane IMG. The electronic image sensor IS is located on the imaging plane IMG. The imaging optical lens consists of eight lenses (E1, E2, E3, E4, E5, E6, E7, E8), with no other interposed lenses between them. All adjacent lenses in the eight-lens imaging optical lens have an air gap along the optical axis.

[0296] The first lens E1 has negative refractive power and is made of glass. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are spherical.

[0297] The second lens E2 has positive refractive power and is made of plastic. Its object-side surface is concave near the optical axis, and its image-side surface is convex near the optical axis. Both surfaces are aspherical, and its image-side surface has two inflection points.

[0298] The third lens E3 has positive refractive power and is made of plastic. Its object-side surface is concave near the optical axis, and its image-side surface is convex near the optical axis. Both of its surfaces are aspherical.

[0299] The fourth lens E4 has positive refractive power and is made of glass. Its object-side surface is convex near the optical axis, and its image-side surface is convex near the optical axis. Both of its surfaces are aspherical.

[0300] The fifth lens E5 has negative refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both surfaces are aspherical. Its object-side surface has a point of inflection and a critical point off-axis.

[0301] The sixth lens E6 has negative refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are aspherical. Its object-side surface has a point of inflection, its image-side surface has a point of inflection, and its object-side surface has a critical point off-axis.

[0302] The seventh lens E7 has positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is convex near the optical axis. Both of its surfaces are aspherical. Its object-side surface has two inflection points, its image-side surface has two inflection points, and its object-side surface has two critical points off-axis.

[0303] The eighth lens E8 has negative refractive power and is made of plastic. Its object-side surface is concave near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are aspherical. Its object-side surface has two inflection points, its image-side surface has one inflection point, and its image-side surface has a critical point off-axis.

[0304] The filter element E9 is made of glass and is located between the eighth lens E8 and the imaging surface IMG. It does not affect the focal length of the imaging optical lens.

[0305] Please refer to Table 6A and Table 6B below.

[0306]

[0307]

[0308]

[0309]

[0310] In the sixth embodiment, the equation for the aspherical curve is expressed as in the first embodiment. Furthermore, the definitions in Table 6C are the same as in the first embodiment and will not be repeated here.

[0311]

[0312] <Seventh Embodiment>

[0313] Please refer to Figures 13 to 14 ,in Figure 13 A schematic diagram of an image-capturing device according to the seventh embodiment of this disclosure is shown. Figure 14 From left to right, the graphs show the spherical aberration, astigmatism, and distortion curves of the seventh embodiment. Figure 13 It is known that the image capturing device 7 includes an image capturing optical lens (not otherwise labeled) and an electronic image sensor IS. The image capturing optical lens, along the optical path from the object side to the image side, sequentially includes a first lens E1, a second lens E2, an aperture stop S1, a third lens E3, an aperture ST, a fourth lens E4, an aperture stop S2, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, a filter element E9, and an imaging surface IMG. The electronic image sensor IS is disposed on the imaging surface IMG. The image capturing optical lens comprises eight lenses (E1, E2, E3, E4, E5, E6, E7, E8), and there are no other interposed lenses between each lens. Furthermore, all adjacent lenses in the eight lenses of the image capturing optical lens have an air gap along the optical axis.

[0314] The first lens E1 has negative refractive power and is made of glass. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are spherical.

[0315] The second lens E2 has negative refractive power and is made of plastic. Its object-side surface is concave near the optical axis, and its image-side surface is convex near the optical axis. Both of its surfaces are aspherical.

[0316] The third lens E3 has positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both surfaces are aspherical. Its image-side surface has two inflection points, and its image-side surface has a critical point off-axis.

[0317] The fourth lens E4 has positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is convex near the optical axis. Both of its surfaces are aspherical.

[0318] The fifth lens E5 has negative refractive power and is made of plastic. Its object-side surface is concave near the optical axis, and its image-side surface is concave near the optical axis. Both surfaces are aspherical, and its image-side surface has a point of inflection.

[0319] The sixth lens E6 has negative refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both surfaces are aspherical. Its object-side surface has one inflection point, and its image-side surface has two inflection points. Its object-side surface has a critical point off-axis, and its image-side surface has a critical point off-axis.

[0320] The seventh lens E7 has positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both surfaces are aspherical. Its object-side surface has two inflection points, and its image-side surface has one inflection point. Its object-side surface has a critical point off-axis, and its image-side surface has a critical point off-axis.

[0321] The eighth lens, E8, has negative refractive power and is made of plastic. Its object-side surface is concave near the optical axis, and its image-side surface is concave near the optical axis. Both surfaces are aspherical. Its object-side surface has two inflection points, and its image-side surface has three inflection points. Its object-side surface has two critical points off-axis, and its image-side surface has one critical point off-axis.

[0322] The filter element E9 is made of glass and is located between the eighth lens E8 and the imaging surface IMG. It does not affect the focal length of the imaging optical lens.

[0323] Please refer to Table 7A and Table 7B below.

[0324]

[0325]

[0326]

[0327]

[0328] In the seventh embodiment, the equation for the aspherical curve is expressed as in the first embodiment. Furthermore, the definitions in Table 7C are the same as in the first embodiment and will not be repeated here.

[0329]

[0330] <Eighth Embodiment>

[0331] Please refer to Figures 15 to 16 ,in Figure 15A schematic diagram of an image-capturing device according to the eighth embodiment of this disclosure is shown. Figure 16 From left to right, the graphs show the spherical aberration, astigmatism, and distortion curves of the eighth embodiment. Figure 15 It is known that the image capturing device 8 includes an image capturing optical lens (not otherwise labeled) and an electronic image sensor IS. The image capturing optical lens, along the optical path from the object side to the image side, sequentially includes a first lens E1, a second lens E2, an aperture stop S1, a third lens E3, an aperture ST, a fourth lens E4, an aperture stop S2, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, a filter element E9, and an imaging surface IMG. The electronic image sensor IS is disposed on the imaging surface IMG. The image capturing optical lens comprises eight lenses (E1, E2, E3, E4, E5, E6, E7, E8), and there are no other interposed lenses between each lens. Furthermore, all adjacent lenses in the eight lenses of the image capturing optical lens have an air gap along the optical axis.

[0332] The first lens E1 has negative refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are spherical.

[0333] The second lens E2 has positive refractive power and is made of plastic. Its object-side surface is concave near the optical axis, and its image-side surface is convex near the optical axis. Both surfaces are aspherical, and its image-side surface has a point of inflection.

[0334] The third lens E3 has positive refractive power and is made of plastic. Its object-side surface is concave near the optical axis, and its image-side surface is convex near the optical axis. Both surfaces are aspherical, and its object-side surface has a point of inflection.

[0335] The fourth lens E4 has positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is convex near the optical axis. Both of its surfaces are aspherical.

[0336] The fifth lens E5 has negative refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both surfaces are aspherical. Its object-side surface has a point of inflection and a critical point off-axis.

[0337] The sixth lens E6 has negative refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are aspherical. Its object-side surface has a point of inflection, its image-side surface has a point of inflection, and its object-side surface has a critical point off-axis.

[0338] The seventh lens E7 has positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is convex near the optical axis. Both of its surfaces are aspherical. Its object-side surface has two inflection points, and its image-side surface has two inflection points. Its object-side surface has one critical point off-axis, and its image-side surface has two critical points off-axis.

[0339] The eighth lens E8 has negative refractive power and is made of plastic. Its object-side surface is concave near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are aspherical. Its object-side surface has two inflection points, and its image-side surface has three inflection points. Its object-side surface has a critical point off-axis, and its image-side surface has a critical point off-axis.

[0340] The filter element E9 is made of glass and is located between the eighth lens E8 and the imaging surface IMG. It does not affect the focal length of the imaging optical lens.

[0341] Please refer to Table 8A and Table 8B below.

[0342]

[0343]

[0344]

[0345]

[0346] In the eighth embodiment, the equation for the aspherical curve is expressed as in the first embodiment. Furthermore, the definitions in Table 8C are the same as in the first embodiment and will not be repeated here.

[0347]

[0348]

[0349] <Ninth Embodiment>

[0350] Please refer to Figures 17 to 18 ,in Figure 17 A schematic diagram of an image-capturing device according to the ninth embodiment of this disclosure is shown. Figure 18 From left to right, the graphs show the spherical aberration, astigmatism, and distortion curves of the ninth embodiment. Figure 17It is known that the image capturing device 9 includes an image capturing optical lens (not otherwise labeled) and an electronic image sensor IS. The image capturing optical lens, along the optical path from the object side to the image side, sequentially includes a first lens E1, a second lens E2, an aperture stop S1, a third lens E3, an aperture ST, a fourth lens E4, an aperture stop S2, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, a filter element E9, and an imaging surface IMG. The electronic image sensor IS is disposed on the imaging surface IMG. The image capturing optical lens comprises eight lenses (E1, E2, E3, E4, E5, E6, E7, E8), and there are no other interposed lenses between each lens. Furthermore, all adjacent lenses in the eight lenses of the image capturing optical lens have an air gap along the optical axis.

[0351] The first lens E1 has negative refractive power and is made of glass. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are spherical.

[0352] The second lens E2 has positive refractive power and is made of plastic. Its object-side surface is concave near the optical axis, and its image-side surface is convex near the optical axis. Both surfaces are aspherical, and its image-side surface has a point of inflection.

[0353] The third lens E3 has positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is convex near the optical axis. Both surfaces are aspherical, and its object-side surface has two inflection points.

[0354] The fourth lens E4 has positive refractive power and is made of glass. Its object-side surface is convex near the optical axis, and its image-side surface is convex near the optical axis. Both of its surfaces are aspherical.

[0355] The fifth lens E5 has negative refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both surfaces are aspherical. Its object-side surface has a point of inflection and a critical point off-axis.

[0356] The sixth lens E6 has negative refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are aspherical. Its object-side surface has a point of inflection, its image-side surface has a point of inflection, its object-side surface has a critical point off-axis, and its image-side surface has a critical point off-axis.

[0357] The seventh lens E7 has positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are aspherical. Its object-side surface has three inflection points, and its image-side surface has three inflection points. Its object-side surface has a critical point off-axis, and its image-side surface has a critical point off-axis.

[0358] The eighth lens E8 has negative refractive power and is made of plastic. Its object-side surface is concave near the optical axis, and its image-side surface is convex near the optical axis. Both surfaces are aspherical. Its object-side surface has two inflection points, its image-side surface has four inflection points, and its image-side surface has two critical points off-axis.

[0359] The filter element E9 is made of glass and is located between the eighth lens E8 and the imaging surface IMG. It does not affect the focal length of the imaging optical lens.

[0360] Please refer to Table 9A and Table 9B below.

[0361]

[0362]

[0363]

[0364]

[0365] In the ninth embodiment, the equation for the aspherical curve is expressed as in the first embodiment. Furthermore, the definitions in Table 9C are the same as in the first embodiment and will not be repeated here.

[0366]

[0367]

[0368] <Tenth Embodiment>

[0369] Please refer to Figures 19 to 20 ,in Figure 19 A schematic diagram of an image-capturing device according to the tenth embodiment of this disclosure is shown. Figure 20 From left to right, the graphs show the spherical aberration, astigmatism, and distortion curves of the tenth embodiment. Figure 19It is known that the image capturing device 10 includes an image capturing optical lens (not otherwise labeled) and an electronic image sensor IS. The image capturing optical lens, along the optical path from the object side to the image side, sequentially includes a first lens E1, a second lens E2, an aperture stop S1, a third lens E3, an aperture ST, a fourth lens E4, an aperture stop S2, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, a filter element E9, and an imaging surface IMG. The electronic image sensor IS is disposed on the imaging surface IMG. The image capturing optical lens comprises eight lenses (E1, E2, E3, E4, E5, E6, E7, E8), and there are no other interposed lenses between each lens. Furthermore, all adjacent lenses in the eight lenses of the image capturing optical lens have an air gap along the optical axis.

[0370] The first lens E1 has negative refractive power and is made of glass. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are spherical.

[0371] The second lens E2 has positive refractive power and is made of plastic. Its object-side surface is concave near the optical axis, and its image-side surface is convex near the optical axis. Both surfaces are aspherical, and its image-side surface has a point of inflection.

[0372] The third lens E3 has positive refractive power and is made of plastic. Its object-side surface is concave near the optical axis, and its image-side surface is convex near the optical axis. Both surfaces are aspherical, and its object-side surface has a point of inflection.

[0373] The fourth lens E4 has positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is convex near the optical axis. Both of its surfaces are aspherical.

[0374] The fifth lens E5 has negative refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both surfaces are aspherical. Its object-side surface has a point of inflection and a critical point off-axis.

[0375] The sixth lens E6 has negative refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are aspherical. Its object-side surface has a point of inflection, its image-side surface has a point of inflection, its object-side surface has a critical point off-axis, and its image-side surface has a critical point off-axis.

[0376] The seventh lens E7 has positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is convex near the optical axis. Both of its surfaces are aspherical. Its object-side surface has three inflection points, its image-side surface has two inflection points, and its object-side surface has a critical point off-axis.

[0377] The eighth lens E8 has negative refractive power and is made of plastic. Its object-side surface is concave near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are aspherical. Its object-side surface has two inflection points, its image-side surface has three inflection points, and its image-side surface has a critical point off-axis.

[0378] The filter element E9 is made of glass and is located between the eighth lens E8 and the imaging surface IMG. It does not affect the focal length of the imaging optical lens.

[0379] Please refer to Table 10A and Table 10B below.

[0380]

[0381]

[0382]

[0383]

[0384] In the tenth embodiment, the equation for the aspherical curve is expressed as in the first embodiment. Furthermore, the definitions in Table 10C are the same as in the first embodiment and will not be repeated here.

[0385]

[0386]

[0387] <Eleventh Embodiment>

[0388] Please refer to Figures 21 to 22 ,in Figure 21 A schematic diagram of an image-capturing device according to the eleventh embodiment of this disclosure is shown. Figure 22 From left to right, the graphs show the spherical aberration, astigmatism, and distortion curves of the eleventh embodiment. Figure 21 It is known that the image capturing device 11 includes an image capturing optical lens (not otherwise labeled) and an electronic image sensor IS. The image capturing optical lens, along the optical path from the object side to the image side, sequentially includes a first lens E1, a second lens E2, an aperture stop S1, a third lens E3, an aperture ST, a fourth lens E4, an aperture stop S2, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, a filter element E9, and an imaging surface IMG. The electronic image sensor IS is disposed on the imaging surface IMG. The image capturing optical lens comprises eight lenses (E1, E2, E3, E4, E5, E6, E7, E8), and there are no other interposed lenses between each lens. Furthermore, all adjacent lenses in the eight lenses of the image capturing optical lens have an air gap along the optical axis.

[0389] The first lens E1 has negative refractive power and is made of glass. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both surfaces are aspherical, and its object-side surface has a point of inflection.

[0390] The second lens E2 has positive refractive power and is made of plastic. Its object-side surface is concave near the optical axis, and its image-side surface is convex near the optical axis. Both of its surfaces are aspherical.

[0391] The third lens E3 has positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are aspherical. Its image-side surface has two inflection points and two critical points off-axis.

[0392] The fourth lens E4 has positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is convex near the optical axis. Both of its surfaces are aspherical.

[0393] The fifth lens E5 has negative refractive power and is made of plastic. Its object-side surface is concave near the optical axis, and its image-side surface is concave near the optical axis. Both surfaces are aspherical, and its image-side surface has a point of inflection.

[0394] The sixth lens E6 has negative refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are aspherical. Its object-side surface has one inflection point, and its image-side surface has three inflection points. Its object-side surface has a critical point off-axis, and its image-side surface has a critical point off-axis.

[0395] The seventh lens E7 has positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both surfaces are aspherical. Its object-side surface has two inflection points, and its image-side surface has one inflection point. Its object-side surface has a critical point off-axis, and its image-side surface has a critical point off-axis.

[0396] The eighth lens, E8, has negative refractive power and is made of plastic. Its object-side surface is concave near the optical axis, and its image-side surface is concave near the optical axis. Both surfaces are aspherical. Its object-side surface has two inflection points, and its image-side surface has three inflection points. Its object-side surface has two critical points off-axis, and its image-side surface has one critical point off-axis.

[0397] The filter element E9 is made of glass and is located between the eighth lens E8 and the imaging surface IMG. It does not affect the focal length of the imaging optical lens.

[0398] Please refer to Table 11A and Table 11B below.

[0399]

[0400]

[0401]

[0402]

[0403] In the eleventh embodiment, the equation for the aspherical curve is expressed as in the first embodiment. Furthermore, the definitions in Table 11C are the same as in the first embodiment and will not be repeated here.

[0404]

[0405] <Twelfth Embodiment>

[0406] Please refer to Figures 23 to 24 ,in Figure 23 A schematic diagram of an image-capturing device according to the twelfth embodiment of this disclosure is shown. Figure 24 From left to right, the graphs show the spherical aberration, astigmatism, and distortion curves of the twelfth embodiment. Figure 23 It is known that the image capturing device 12 includes an image capturing optical lens (not otherwise labeled) and an electronic image sensor IS. The image capturing optical lens, along the optical path from the object side to the image side, sequentially includes a first lens E1, a second lens E2, an aperture stop S1, a third lens E3, an aperture ST, a fourth lens E4, an aperture stop S2, a fifth lens E5, a sixth lens E6, a seventh lens E7, an aperture stop S3, an eighth lens E8, a filter element E9, and an imaging surface IMG. The electronic image sensor IS is disposed on the imaging surface IMG. The image capturing optical lens comprises eight lenses (E1, E2, E3, E4, E5, E6, E7, E8), and there are no other interposed lenses between each lens. Furthermore, all adjacent lenses in the eight lenses of the image capturing optical lens have an air gap along the optical axis.

[0407] The first lens E1 has negative refractive power and is made of glass. Its object-side surface is concave near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are aspherical. Its object-side surface has a point of inflection, its object-side surface has a critical point off-axis, and its object-side surface has at least one convex surface off-axis.

[0408] The second lens E2 has negative refractive power and is made of plastic. Its object-side surface is concave near the optical axis, and its image-side surface is convex near the optical axis. Both of its surfaces are aspherical.

[0409] The third lens E3 has positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are aspherical. Its image-side surface has two inflection points and two critical points off-axis.

[0410] The fourth lens E4 has positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is convex near the optical axis. Both of its surfaces are aspherical.

[0411] The fifth lens E5 has negative refractive power and is made of plastic. Its object-side surface is concave near the optical axis, and its image-side surface is concave near the optical axis. Both surfaces are aspherical, and its image-side surface has a point of inflection.

[0412] The sixth lens E6 has negative refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both surfaces are aspherical. Its object-side surface has one inflection point, and its image-side surface has two inflection points. Its object-side surface has a critical point off-axis, and its image-side surface has a critical point off-axis.

[0413] The seventh lens E7 has positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both surfaces are aspherical. Its object-side surface has two inflection points, and its image-side surface has one inflection point. Its object-side surface has a critical point off-axis, and its image-side surface has a critical point off-axis.

[0414] The eighth lens E8 has negative refractive power and is made of plastic. Its object-side surface is concave near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are aspherical. Its object-side surface has two inflection points, its image-side surface has three inflection points, and its image-side surface has a critical point off-axis.

[0415] The filter element E9 is made of glass and is located between the eighth lens E8 and the imaging surface IMG. It does not affect the focal length of the imaging optical lens.

[0416] Please refer to Table 12A and Table 12B below.

[0417]

[0418]

[0419]

[0420]

[0421] In the twelfth embodiment, the equation for the aspherical curve is expressed as in the first embodiment. Furthermore, the definitions in Table 12C are the same as in the first embodiment and will not be repeated here.

[0422]

[0423] <Thirteenth Embodiment>

[0424] Please refer to Figure 25 This is a perspective view illustrating an image capturing device according to a thirteenth embodiment of the present disclosure. In this embodiment, the image capturing device 100 is a camera module. The image capturing device 100 includes an imaging lens 101, a driving device 102, an electronic photosensitive element 103, and an image stabilization module 104. The imaging lens 101 includes the imaging optical lens of the first embodiment described above, a lens barrel (not otherwise labeled) for supporting the imaging optical lens, and a support device (Holder Member, not otherwise labeled). The imaging lens 101 can also be replaced with the imaging optical lens of other embodiments described above, and the present disclosure is not limited thereto. The image capturing device 100 uses the imaging lens 101 to focus light to generate an image, and cooperates with the driving device 102 to focus the image, finally imaging it on the electronic photosensitive element 103 and outputting it as image data.

[0425] The driving device 102 may have an auto-focus function, and its driving method can use a driving system such as a voice coil motor (VCM), microelectromechanical systems (MEMS), piezoelectric systems, and shape memory alloys. The driving device 102 enables the imaging lens 101 to achieve a better imaging position, allowing clear images to be captured of the subject at different object distances. In addition, the image capturing device 100 is equipped with a high-sensitivity and low-noise electronic image sensor 103 (such as CMOS or CCD) located on the imaging surface of the imaging optical lens, which can truly present the good image quality of the imaging optical lens.

[0426] The image stabilization module 104 may be, for example, an accelerometer, a gyroscope, or a Hall effect sensor. The drive unit 102 may work in conjunction with the image stabilization module 104 to form an optical image stabilization (OIS) device. By adjusting the changes in different axes of the imaging lens 101, it can compensate for the blurry image caused by shaking during shooting, or use image compensation technology in the imaging software to provide electronic image stabilization (EIS), further improving the image quality of shooting in dynamic and low-light scenes.

[0427] <Fourteenth Embodiment>

[0428] Please refer to Figures 26 to 27 ,in Figure 26 A perspective view of one side of an electronic device according to the fourteenth embodiment of this disclosure is shown, and Figure 27 Draw Figure 26 A three-dimensional diagram of the other side of the electronic device.

[0429] In this embodiment, the electronic device 200 is a smartphone. The electronic device 200 includes, according to the thirteenth embodiment, image-capturing devices 100, 100a, 100b, and 100c, and a display module 201. (As...) Figure 26 As shown, image capturing devices 100, 100a, and 100b are all located on the same side of the electronic device 200 and are all single-focus. Figure 27 As shown, the image capturing device 100c and the display module 201 are both disposed on the other side of the electronic device 200. The image capturing device 100c can serve as a front-facing camera to provide a selfie function, but this disclosure is not limited thereto. Furthermore, the image capturing devices 100a, 100b, and 100c can all include the image capturing optical lens disclosed herein and can all have a structural configuration similar to that of the image capturing device 100. In detail, each of the image capturing devices 100a, 100b, and 100c can include an imaging lens, a driving device, an electronic photosensitive element, and an image stabilization module. The imaging lens of each of the image capturing devices 100a, 100b, and 100c can include, for example, an optical lens group (such as the image capturing optical lens disclosed herein), a lens barrel for supporting the optical lens group, and a support device.

[0430] Image capturing device 100 is a wide-angle image capturing device, image capturing device 100a is a telephoto image capturing device, image capturing device 100b is an ultra-wide-angle image capturing device, and image capturing device 100c is a wide-angle image capturing device. In this embodiment, image capturing devices 100, 100a, and 100b have different viewing angles, allowing the electronic device 200 to provide different magnifications to achieve an optical zoom shooting effect. Furthermore, as... Figure 27 As shown, the opening of the image capturing device 100c can be non-circular, and the lens barrel or lens inside the image capturing device 100c can be cut at the outer diameter to have a chamfered edge to fit the non-circular opening. This allows for a further reduction in the single-axis length of the image capturing device 100c, which helps to reduce the lens volume, increase the area ratio of the display module 201 relative to the electronic device 200, and reduce the thickness of the electronic device 200, further achieving module miniaturization. The aforementioned electronic device 200 is exemplified by including multiple image capturing devices 100, 100a, 100b, and 100c, but the number and configuration of the image capturing devices are not intended to limit this disclosure.

[0431] <Fifteenth Embodiment>

[0432] Please refer to Figures 28 to 30 ,in Figure 28 A perspective view of one side of an electronic device according to the fifteenth embodiment of this disclosure is shown. Figure 29 Draw Figure 28 A three-dimensional diagram of the other side of the electronic device, and Figure 30 Draw Figure 28 System block diagram of an electronic device.

[0433] In this embodiment, the electronic device 300 is a smartphone. The electronic device 300 includes, according to the thirteenth embodiment, image capturing devices 100, 100d, 100e, 100f, and 100g, a flash module 301, a focus assist module 302, an image signal processor 303, a display module 304, and an image software processor 305. Image capturing devices 100 and 100d are both located on the same side of the electronic device 300. The focus assist module 302 may employ a laser rangefinder or a Time-of-Flight (ToF) module, but this disclosure is not limited thereto. Image capturing devices 100e, 100f, and 100g, along with display module 304, are all located on the other side of electronic device 300. Display module 304 can serve as a user interface, allowing image capturing devices 100e, 100f, and 100g to function as front-facing cameras for selfies; however, this disclosure is not limited to this. Furthermore, image capturing devices 100d, 100e, 100f, and 100g can all include the image capturing optical lens disclosed herein and can all have a structural configuration similar to that of image capturing device 100. Specifically, each of image capturing devices 100d, 100e, 100f, and 100g can include an imaging lens, a driving device, an electronic photosensitive element, and an image stabilization module. The imaging lenses of imaging devices 100d, 100e, 100f and 100g may each include, for example, an optical lens group of the imaging optical lens disclosed herein, a lens barrel for carrying the optical lens group and a support device.

[0434] Image capturing device 100 is a wide-angle image capturing device, image capturing device 100d is an ultra-wide-angle image capturing device, image capturing device 100e is a wide-angle image capturing device, image capturing device 100f is an ultra-wide-angle image capturing device, and image capturing device 100g is a time-of-flight ranging image capturing device. In this embodiment, image capturing devices 100 and 100d have different viewing angles, allowing the electronic device 300 to provide different magnifications to achieve optical zoom shooting effects. Additionally, image capturing device 100g can acquire depth information of the image. The above-described electronic device 300 is exemplified by including multiple image capturing devices 100, 100d, 100e, 100f, and 100g, but the number and configuration of the image capturing devices are not intended to limit this disclosure.

[0435] When the user photographs the subject 306, the electronic device 300 uses the image capturing device 100 or image capturing device 100d to capture the image, activates the flash module 301 for supplemental lighting, and uses the subject distance information of the subject 306 provided by the focus assist module 302 for fast focusing. Furthermore, the image signal processor 303 performs image optimization processing to further improve the image quality produced by the image capturing lens. The focus assist module 302 can use an infrared or laser focus assist system to achieve fast focusing. In addition, the electronic device 300 can also use the image capturing devices 100e, 100f, or 100g for shooting. The display module 304 can use a touch screen, combined with the diverse functions of the image software processor 305 for image capturing and image processing (or can use a physical shooting button). The image processed by the image software processor 305 can be displayed on the display module 304.

[0436] <Sixteenth Embodiment>

[0437] Please refer to Figure 31 This is a perspective view illustrating one side of an electronic device according to the sixteenth embodiment of this disclosure.

[0438] In this embodiment, the electronic device 400 is a smartphone. The electronic device 400 includes, according to the thirteenth embodiment, an image capturing device 100, an image capturing device 100h, an image capturing device 100i, a flash module 401, a focus assist module, an image signal processor, a display module, and an image software processor (not shown). The image capturing devices 100, 100h, and 100i are all disposed on the same side of the electronic device 400, while the display module is disposed on the other side. Furthermore, both the image capturing devices 100h and 100i may include the image capturing optical lens disclosed herein and may have a structural configuration similar to that of the image capturing device 100, which will not be described in detail here.

[0439] Image capturing device 100 is a wide-angle image capturing device, image capturing device 100h is a telephoto image capturing device, and image capturing device 100i is an ultra-wide-angle image capturing device. In this embodiment, image capturing devices 100, 100h, and 100i have different viewing angles, allowing the electronic device 400 to provide different magnifications to achieve optical zoom shooting effects. Furthermore, image capturing device 100h is a telephoto image capturing device with an optical path deflection element configuration, so that the total length of image capturing device 100h is not limited by the thickness of the electronic device 400. The optical path deflection element configuration of image capturing device 100h can, for example, have a similar... Figures 35 to 37 The structure can be referred to the aforementioned corresponding structure. Figures 35 to 37The description of the above-described electronic device 400 is given as an example, which includes multiple image capturing devices 100, 100h, and 100i, but the number and configuration of the image capturing devices are not intended to limit this disclosure. When a user photographs a subject, the electronic device 400 uses the image capturing device 100, image capturing device 100h, or image capturing device 100i to focus the light and capture the image, activates the flash module 401 to provide supplementary lighting, and performs subsequent processing in a manner similar to the aforementioned embodiments, which will not be described in detail here.

[0440] <Seventeenth Embodiment>

[0441] Please refer to Figure 32 This is a perspective view illustrating one side of an electronic device according to the seventeenth embodiment of this disclosure.

[0442] In this embodiment, the electronic device 500 is a smartphone. The electronic device 500 includes, according to the thirteenth embodiment, image capturing devices 100, 100j, 100k, 100m, 100n, 100p, 100q, 100r, and 100s, a flash module 501, a focus assist module, an image signal processor, a display module, and an image software processor (not shown). Image capturing devices 100, 100j, 100k, 100m, 100n, 100p, 100q, 100r, and 100s are all located on the same side of the electronic device 500, while the display module is located on the other side of the electronic device 500. Furthermore, the imaging devices 100j, 100k, 100m, 100n, 100p, 100q, 100r, and 100s can all include the imaging optical lens disclosed herein and can all have a structural configuration similar to that of the imaging device 100, which will not be described in detail here.

[0443] Image capturing device 100 is a wide-angle image capturing device, image capturing device 100j is a telephoto image capturing device, image capturing device 100k is a telephoto image capturing device, image capturing device 100m is a wide-angle image capturing device, image capturing device 100n is an ultra-wide-angle image capturing device, image capturing device 100p is an ultra-wide-angle image capturing device, image capturing device 100q is a telephoto image capturing device, image capturing device 100r is a telephoto image capturing device, and image capturing device 100s is a time-of-flight ranging image capturing device. In this embodiment, image capturing devices 100, 100j, 100k, 100m, 100n, 100p, 100q, and 100r have different viewing angles, allowing the electronic device 500 to provide different magnifications to achieve an optical zoom shooting effect. Furthermore, the image capturing devices 100j and 100k can be telescopic image capturing devices configured with optical path deflection elements. The optical path deflection element configuration of the image capturing devices 100j and 100k can, for example, have similar... Figures 35 to 37 The structure can be referred to the aforementioned corresponding structure. Figures 35 to 37 The description of the image acquisition device 100s will not be repeated here. Additionally, the image acquisition device 100s can acquire depth information of the image. The electronic device 500 described above is exemplified by including multiple image acquisition devices 100, 100j, 100k, 100m, 100n, 100p, 100q, 100r, and 100s, but the number and configuration of the image acquisition devices are not intended to limit this disclosure. When a user photographs a subject, the electronic device 500 uses image acquisition devices 100, 100j, 100k, 100m, 100n, 100p, 100q, 100r, or 100s to focus light and acquire an image, activates the flash module 501 for supplemental lighting, and performs subsequent processing in a manner similar to the aforementioned embodiments, which will not be repeated here.

[0444] The image capturing device disclosed herein is not limited to smartphones. It can also be applied to mobile focusing systems as needed, offering excellent aberration correction and good image quality. For example, the image capturing device can be used in a wide range of electronic devices, including 3D image capture, digital cameras, mobile devices, tablets, smart TVs, network monitoring equipment, dashcams, reversing cameras, multi-lens systems, recognition systems, motion-sensing game consoles, and wearable devices. The aforementioned electronic devices are merely illustrative examples of practical applications of this disclosure and do not limit the scope of application of the image capturing device disclosed herein.

[0445] Although this disclosure is based on the foregoing preferred embodiments, it is not intended to limit this disclosure. Any person skilled in the art may make some modifications and refinements without departing from the spirit and scope of this disclosure. Therefore, the scope of patent protection of this disclosure shall be determined by the claims appended to this specification.

Claims

1. An image-capturing optical lens, characterized in that, It includes eight lenses, and the eight lenses are, in order from the object side to the image side along the optical path, the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, the seventh lens, and the eighth lens. Each of the eight lenses has an object-side surface facing the object side and an image-side surface facing the image side; Among them, the first lens has a negative refractive power, the object-side surface of the fourth lens is convex near the optical axis, the image-side surface of the fifth lens is concave near the optical axis, the object-side surface of the seventh lens has at least one inflection point, the eighth lens has a negative refractive power, and the object-side surface of the eighth lens is concave near the optical axis; Among them, the imaging optical lens further includes an aperture. The distance on the optical axis from the object-side surface of the first lens to the image-side surface of the third lens is Dr1r6, the distance on the optical axis from the aperture to the image-side surface of the eighth lens is SD, the distance on the optical axis between the second lens and the third lens is T23, 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 Abbe number of the third lens is V3, and the refractive index of the third lens is N3, which satisfy the following conditions: 1.05 < Dr1r6 / SD < 2.00; 0.03 < (T23 + T45) / T34 < 5.00; and 17.00 < V3 / N3 < 50.

00.

2. The imaging optical lens according to claim 1, characterized in that, The object-side surface of the first lens has at least one convex surface at the off-axis position, the fourth lens has a positive refractive power, the seventh lens has a positive refractive power, the object-side surface of the seventh lens is convex near the optical axis, and the object-side surface of the eighth lens has at least one inflection point.

3. The imaging optical lens according to claim 1, characterized in that, The image-side surface of the second lens is convex near the optical axis, the fifth lens has a negative refractive power, at least one lens in the imaging optical lens has both an object-side surface and an image-side surface that are spherical surfaces, and at least one lens in the imaging optical lens is made of glass.

4. The imaging optical lens according to claim 1, characterized in that, The distance on the optical axis from the image-side surface of the eighth lens to an imaging surface is BL, the focal length of the imaging optical lens is f, the distance on the optical axis from the aperture to the imaging surface is SL, and the distance on the optical axis from the object-side surface of the first lens to the imaging surface is TL, which satisfy the following conditions: 0.08 < BL / f < 0.55; and 0.28 < SL / TL < 0.

62.

5. The imaging optical lens according to claim 1, characterized in that, At least two lenses in the imaging optical lens are made of plastic; Among them, the thickness of the second lens on the optical axis is CT2, and the thickness of the eighth lens on the optical axis is CT8, which satisfy the following conditions: 2.00 < CT2 / CT8 < 10.

00.

6. The imaging optical lens according to claim 1, characterized in that, The distance on the optical axis from the object-side surface of the first lens to an imaging surface is TL, the F-number of the imaging optical lens is Fno, and the maximum imaging height of the imaging optical lens is ImgH, which satisfy the following conditions: 4.80 < TL×Fno / ImgH < 9.

00.

7. The imaging optical lens according to claim 1, characterized in that, The focal length of the imaging optical lens is f, the combined focal length of the fifth lens and the sixth lens is f56, the radius of curvature of the object-side surface of the fourth lens is R7, and the radius of curvature of the image-side surface of the fourth lens is R8, which satisfy the following conditions: -1.50 < f / f56 < -0.30; and -2.00 < (R7 + R8) / (R7 - R8) < 2.

00.

8. The imaging optical lens according to claim 1, characterized in that, The focal length of the imaging optical lens is f, the focal length of the first lens is f1, the focal length of the fifth lens is f5, the focal length of the eighth lens is f8, the radius of curvature of the object-side surface of the fourth lens is R7, and the radius of curvature of the image-side surface of the fourth lens is R8, which satisfy the following conditions: -2.50 < f / f1 + f / f5 + f / f8 < -1.00; and -4.00 < R7 / R8 < 2.

50.

9. The imaging optical lens according to claim 1, characterized in that, The radius of curvature of the object-side surface of the first lens is R1, and the radius of curvature of the image-side surface of the eighth lens is R16, which satisfy the following conditions: -2.50 < R1 / R16 < 5.

50.

10. The imaging optical lens according to claim 1, characterized in that, The radius of curvature of the object-side surface of the second lens is R3, and the radius of curvature of the image-side surface of the second lens is R4, which satisfy the following conditions: 0.10 < R3 / R4 < 25.

00.

11. The imaging optical lens according to claim 1, characterized in that, The focal length of the imaging optical lens is f, the focal length of the second lens is f2, the focal length of the third lens is f3, and the maximum viewing angle of the imaging optical lens is FOV, which satisfy the following conditions: 0.03 < |f / f2| + |f / f3| < 1.00; and 140.0 degrees < FOV < 195.0 degrees.

12. The imaging optical lens according to claim 1, characterized in that, The displacement parallel to the optical axis from the intersection of the image-side surface of the first lens on the optical axis to the maximum effective radius position of the image-side surface of the first lens is SAG1R2, the thickness of the first lens on the optical axis is CT1, the maximum effective radius of the object-side surface of the first lens is Y1R1, and the maximum effective radius of the image-side surface of the eighth lens is Y8R2, which satisfy the following conditions: 1.35 < SAG1R2 / CT1 < 2.50; and 1.00 < Y1R1 / Y8R2 < 2.

00.

13. The imaging optical lens according to claim 1, characterized in that, The distance parallel to the optical axis between the maximum effective radius position of the object-side surface of the third lens and the maximum effective radius position of the image-side surface of the third lens is ET3, the distance parallel to the optical axis between the maximum effective radius position of the object-side surface of the sixth lens and the maximum effective radius position of the image-side surface of the sixth lens is ET6, the maximum imaging height of the imaging optical lens is ImgH, the maximum effective radius of the object-side surface of the first lens is Y1R1, and the maximum effective radius of the object-side surface of the fourth lens is Y4R1, which satisfy the following conditions: 1.60 < ET3 / ET6 < 5.00; and 4.50 < ImgH / Y4R1 + Y1R1 / Y4R1 < 16.

00.

14. An image capturing device, characterized in that, Comprising: The imaging optical lens according to claim 1; and An electronic photosensitive element disposed on an imaging surface of the imaging optical lens.

15. An electronic device, characterized in that, Comprising: The imaging device according to claim 14.

16. An image-capturing optical lens, characterized in that, It includes eight lenses, which are, in order from the object side to the image side along the optical path, the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, the seventh lens, and the eighth lens. And the eight lenses respectively have an object-side surface facing the object side direction and an image-side surface facing the image side direction; Among them, the object-side surface of the second lens is concave near the optical axis, the image-side surface of the second lens is convex near the optical axis, the object-side surface of the fourth lens is convex near the optical axis, the fifth lens has a negative refractive power, and the object-side surface of the seventh lens has at least one inflection point; Among them, the imaging optical lens further includes an aperture. The distance on the optical axis from the object-side surface of the first lens to the image-side surface of the third lens is Dr1r6, the distance on the optical axis from the aperture to the image-side surface of the eighth lens is SD, the radius of curvature of the image-side surface of the first lens is R2, the radius of curvature of the image-side surface of the eighth lens is R16. The maximum viewing angle in the imaging optical lens is FOV, which satisfies the following conditions: 1.05 < Dr1r6 / SD < 2.00; -1.00 < R2 / R16 < 1.30; and 130.0 degrees < FOV < 200.0 degrees.

17. The imaging optical lens according to claim 16, characterized in that, The first lens has a negative refractive power, the object-side surface of the seventh lens is convex near the optical axis, and there is an air gap on the optical axis between all adjacent lenses in the imaging optical lens.

18. The imaging optical lens according to claim 16, characterized in that, The eighth lens has a negative refractive power; Among them, the distance between the second lens and the third lens on the optical axis is T23, 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, which satisfies the following conditions: 0.03 < (T23 + T45) / T34 < 5.

00.

19. The imaging optical lens according to claim 16, characterized in that, The object-side surface of the eighth lens is concave near the optical axis, and at least one lens in the imaging optical lens is made of glass and its object-side surface and image-side surface are both spherical.

20. The imaging optical lens according to claim 16, characterized in that, The focal length of the fifth lens is f5, the focal length of the eighth lens is f8, the radius of curvature of the image-side surface of the second lens is R4, the radius of curvature of the object-side surface of the eighth lens is R15, which satisfies the following conditions: -1.0 < f5 / f8 < 3.00; and -1.00 < R15 / R4 < 20.

00.

21. The imaging optical lens according to claim 16, characterized in that, The focal length of the imaging optical lens is f, the focal length of the sixth lens is f6, the radius of curvature of the object-side surface of the eighth lens is R15, the radius of curvature of the image-side surface of the eighth lens is R16, which satisfies the following conditions: -0.50 < f / f6 < 0.30; and -7.50 < (R15 + R16) / (R15 - R16) < 1.

50.

22. The imaging optical lens according to claim 16, characterized in that, The thickness of the second lens on the optical axis is CT2, the thickness of the third lens on the optical axis is CT3, the thickness of the fourth lens on the optical axis is CT4, the thickness of the fifth lens on the optical axis is CT5, the thickness of the sixth lens on the optical axis is CT6, the thickness of the seventh lens on the optical axis is CT7, and the thickness of the eighth lens on the optical axis is CT8, which satisfy the following conditions: 0.70 < (CT2 + CT3) / (CT4 + CT5 + CT6 + CT7 + CT8) < 1.

80.

23. The imaging optical lens according to claim 16, characterized in that, The image-side surface of the fifth lens is concave near the optical axis; Wherein, the distance from the aperture to an imaging surface on the optical axis is SL, and the distance from the object-side surface of the first lens to the imaging surface on the optical axis is TL, which satisfy the following conditions: 0.25 < SL / TL < 0.

75.

24. The imaging optical lens according to claim 16, characterized in that, The radius of curvature of the image-side surface of the first lens is R2, and the radius of curvature of the object-side surface of the seventh lens is R13, which satisfy the following conditions: -0.10 < R2 / R13 < 2.

00.

25. The imaging optical lens according to claim 16, characterized in that, The image-side surface of the fourth lens is convex near the optical axis; Wherein, the distance from the image-side surface of the eighth lens to an imaging surface on the optical axis is BL, and the focal length of the imaging optical lens is f, which satisfy the following conditions: 0.08 < BL / f < 0.

55.

26. The imaging optical lens according to claim 16, characterized in that, The maximum imaging height of the imaging optical lens is ImgH, and the distance from the object-side surface of the first lens to the image-side surface of the eighth lens on the optical axis is TD, which satisfy the following conditions: 0.50 < 2 × ImgH / TD < 1.

10.

27. The imaging optical lens according to claim 16, characterized in that, The maximum effective radius of the image-side surface of the fifth lens is Y5R2, the maximum effective radius of the object-side surface of the sixth lens is Y6R1, the maximum effective radius of the image-side surface of the sixth lens is Y6R2, and the maximum effective radius of the object-side surface of the seventh lens is Y7R1, which satisfy the following conditions: 2.30 < Y7R1 / Y6R2 + Y6R1 / Y5R2 < 4.

00.

28. The imaging optical lens according to claim 16, characterized in that, The vertical distance between the off-axis critical point closest to the optical axis on the object-side surface of the seventh lens and the optical axis is Yc71, the vertical distance between the inflection point closest to the optical axis on the object-side surface of the eighth lens and the optical axis is Yi81, the distance parallel to the optical axis between the maximum effective radius position of the object-side surface of the first lens and the maximum effective radius position of the image-side surface of the first lens is ET1, and the thickness of the first lens on the optical axis is CT1, which satisfy the following conditions: 0.65 < Yc71 / Yi81 < 1.40; and 1.10 < ET1 / CT1 < 2.

20.

29. The imaging optical lens according to claim 16, characterized in that, The distance on the optical axis from the object-side surface of the first lens to the image-side surface of the third lens is Dr1r6; the distance on the optical axis from the aperture to the image-side surface of the eighth lens is SD; the optical axis spacing between the second lens and the third lens is T23; the optical axis spacing between the third lens and the fourth lens is T34; the optical axis spacing between the fourth lens and the fifth lens is T45; the Abbe number of the third lens is V3; the refractive index of the third lens is N3; the radius of curvature of the image-side surface of the first lens is R2; the radius of curvature of the image-side surface of the eighth lens is R16; and the maximum angle of view (FOV) in the imaging optical lens satisfies the following conditions: 1.29≤Dr1r6 / SD≤1.67; 0.12≤(T23+T45) / T34≤1.23; 36.22≤V3 / N3≤38.79; -0.12≤R² / R¹⁶≤0.57; and 153.8 degrees ≤ FOV ≤ 173.04 degrees.

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