Imaging optical lens assembly, image capturing device and electronic device

Abstract

The invention discloses an imaging optical lens group. The imaging optical lens group comprises six lenses. The six lenses are sequentially a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens from the object side to the image side along an optical path. Each of the six 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 positive refractive power. The second lens element has positive refractive power. The third lens element has negative refractive power. The fourth lens element has an image-side surface being concave in a paraxial region thereof and having at least one inflection point. The fifth lens element has an object-side surface being convex in a paraxial region thereof. All adjacent lenses in the imaging optical lens group do not move relative to each other. When specific conditions are met, the imaging optical lens group can meet the requirements of miniaturization and high imaging quality at the same time. The invention further discloses an image capturing device and an electronic device with the imaging optical lens group.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to an imaging optical lens assembly, an image capturing device and an electronic device, in particular to an imaging optical lens assembly and an image capturing device suitable for an electronic device. BACKGROUND

[0002] With the advancement of semiconductor technology, the performance of electronic photosensitive elements is improved, and the pixel size can be smaller. Therefore, optical lenses with high imaging quality are indispensable.

[0003] With the rapid development of technology, electronic devices equipped with optical lenses are more widely used, and the requirements for optical lenses are more diverse. Since existing optical lenses are not easy to balance the demands of imaging quality, sensitivity, aperture size, volume or viewing angle, the present disclosure provides an optical lens to meet the needs. SUMMARY

[0004] The present disclosure provides an imaging optical lens assembly, an image capturing device and an electronic device. The imaging optical lens assembly includes six lenses arranged in order from the object side to the image side along the optical path. When certain conditions are met, the imaging optical lens assembly provided by the present disclosure can meet the needs of miniaturization and high imaging quality at the same time.

[0005] The present disclosure provides an imaging optical lens assembly, which includes six lenses. The six lenses are arranged in order 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 and a sixth lens. The six lenses respectively have an object side surface facing the object side direction and an image side surface facing the image side direction. Preferably, the first lens has positive refractive power. Preferably, the second lens has positive refractive power. Preferably, the third lens has negative refractive power. Preferably, the image side surface of the fourth lens is concave at the vicinity of the optical axis. Preferably, the image side surface of the fourth lens has at least one inflection point. Preferably, the object side surface of the fifth lens is convex at the vicinity of the optical axis. Preferably, all adjacent lenses in the imaging optical lens assembly do not move relative to each other. Wherein 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 distance from the image side surface of the sixth lens to the imaging surface on the optical axis is BL, the interval distance between the third lens and the fourth lens on the optical axis is T34, the focal length of the fourth lens is f4, and the focal length of the fifth lens is f5, preferably satisfy the following conditions:

[0006] 0.10 < CT5 / CT6 < 2.00;

[0007] 0.05 < BL / T34 < 1.25; and

[0008] 0.05 < |f4 / f5| < 1.45.

[0009] The present disclosure also provides an imaging optical lens assembly comprising six lenses. The six lenses are sequentially arranged along an optical path from an object side to an image side as a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens. The six lenses respectively have an object side surface facing an object side direction and an image side surface facing an image side direction. Preferably, the second lens has positive refractive power. Preferably, the object side surface of the second lens is convex at a vicinity of an optical axis. Preferably, the third lens has negative refractive power. Preferably, the image side surface of the fourth lens is concave at a vicinity of an optical axis. Preferably, the image side surface of the fourth lens has at least one inflection point. Preferably, the object side surface of the fifth lens is convex at a vicinity of an optical axis. Wherein, a focal length of the imaging optical lens assembly is f, a focal length of the first lens is f1, a focal length of the second lens is f2, a focal length of the fifth lens is f5, a focal length of the sixth lens is f6, a distance between the third lens and the fourth lens on the optical axis is T34, a distance between the fourth lens and the fifth lens on the optical axis is T45, a distance between the fifth lens and the sixth lens on the optical axis is T56, a radius of curvature of the object side surface of the first lens is R1, a radius of curvature of the image side surface of the first lens is R2, and the following conditions are preferably satisfied:

[0010] 0.20 < f / f5 + f / f6 < 4.00;

[0011] 0.05 < (T45 + T56) / T34 < 1.00;

[0012] -10.00 < (R1 + R2) / (R1 - R2) < 0.00; and

[0013] 0.30 < |f1 / f2| < 1.70.

[0014] The present disclosure also provides an imaging optical lens assembly comprising six lenses. The six lenses are sequentially arranged along an optical path from an object side to an image side as a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens. The six lenses respectively have an object side surface facing an object side direction and an image side surface facing an image side direction. Preferably, the first lens has positive refractive power. Preferably, the second lens has positive refractive power. Preferably, the image side surface of the fourth lens is concave at a vicinity of an optical axis. Preferably, the image side surface of the fourth lens has at least one inflection point. Wherein, a focal length of the imaging optical lens assembly is f, a focal length of the second lens is f2, a focal length of the fourth lens is f4, a focal length of the fifth lens is f5, a focal length of the sixth lens is f6, a distance between the second lens and the third lens on the optical axis is T23, a distance between the third lens and the fourth lens on the optical axis is T34, a distance between the image side surface of the sixth lens and an imaging plane on the optical axis is BL, a distance between the object side surface of the fourth lens and the image side surface of the sixth lens on the optical axis is Dr7r12, an Abbe number of the third lens is V3, and an Abbe number of the fifth lens is V5, and the following conditions are preferably satisfied:

[0015] 0.65 < f / f5 + f / f6 < 4.00;

[0016] 0.02 < T23 / T34 < 1.10;

[0017] 0.15 < BL / Dr7r12 < 0.75;

[0018] 20.0 < V3 + V5 < 60.0; and

[0019] 0.05 < |f4 / f2| < 1.25.

[0020] The present disclosure provides an image capturing device, comprising the aforementioned imaging optical lens assembly and an electronic photosensitive element, wherein the electronic photosensitive element is disposed on an image plane of the imaging optical lens assembly.

[0021] The present disclosure provides an electronic device, comprising the aforementioned image capturing device.

[0022] When CT5 / CT6 satisfies the aforementioned condition, the ratio of the fifth lens center thickness and the sixth lens center thickness can be adjusted, which helps to balance the volume distribution at the image side end of the imaging optical lens assembly.

[0023] When BL / T34 satisfies the aforementioned condition, it helps to balance the volume distribution of the imaging optical lens assembly.

[0024] When |f4 / f5| satisfies the aforementioned condition, the distribution of refractive power between the fourth lens and the fifth lens can be effectively balanced, which helps to correct the spherical aberration.

[0025] When f / f5 + f / f6 satisfies the aforementioned condition, the refractive power at the image side end of the imaging optical lens assembly can be adjusted, which helps to balance the refractive power distribution of the imaging optical lens assembly and improve the imaging quality.

[0026] When (T45+T56) / T34 satisfies the aforementioned condition, it helps to increase the arrangement compactness of the fourth lens to the sixth lens, so as to compress the total length of the imaging optical lens assembly.

[0027] When (R1+R2) / (R1-R2) satisfies the aforementioned condition, the surface shape of the first lens can be controlled, which helps to correct the aberration in the imaging optical lens assembly.

[0028] When |f1 / f2| satisfies the aforementioned condition, the refractive power distribution of the first lens and the second lens can be effectively balanced, which helps to avoid the refractive power of a single lens being too large and reducing the imaging quality.

[0029] When T23 / T34 satisfies the aforementioned condition, it helps to increase the arrangement compactness of the second lens and the third lens, so as to compress the volume.

[0030] When V3+V5 satisfies the above condition, it helps to balance the converging ability between different wavebands of light to correct chromatic aberration.

[0031] When V3+V5 satisfies the above condition, it helps to balance the converging ability between different wavebands of light to correct chromatic aberration.

[0032] When |f4 / f2| satisfies the above condition, it can effectively adjust the refractive power of the second lens and the fourth lens, which helps to reduce the sensitivity of a single lens and improve the assembly yield.

[0033] The above description of the disclosure and the following description of the embodiments are used to demonstrate and explain the spirit and principles of the disclosure, and provide further explanation of the claims of the disclosure. BRIEF DESCRIPTION OF DRAWINGS

[0034] Figure 1 A schematic diagram of an image capturing device according to a first embodiment of the disclosure is shown.

[0035] Figure 2 The ball aberration, astigmatism and distortion curves of the first embodiment are shown from left to right in sequence.

[0036] Figure 3 A schematic diagram of an image capturing device according to a second embodiment of the disclosure is shown.

[0037] Figure 4 The ball aberration, astigmatism and distortion curves of the second embodiment are shown from left to right in sequence.

[0038] Figure 5 A schematic diagram of an image capturing device according to a third embodiment of the disclosure is shown.

[0039] Figure 6 The ball aberration, astigmatism and distortion curves of the third embodiment are shown from left to right in sequence.

[0040] Figure 7 A schematic diagram of an image capturing device according to a fourth embodiment of the disclosure is shown.

[0041] Figure 8 The ball aberration, astigmatism and distortion curves of the fourth embodiment are shown from left to right in sequence.

[0042] Figure 9 A schematic diagram of an image capturing device according to a fifth embodiment of the disclosure is shown.

[0043] Figure 10 The ball aberration, astigmatism and distortion curves of the fifth embodiment are shown from left to right in sequence.

[0044] Figure 11 A schematic diagram of an image capturing device according to a sixth embodiment of the disclosure is shown.

[0045] Figure 12 From left to right in sequence are the spherical aberration, astigmatism and distortion curves of the sixth embodiment.

[0046] Figure 13 A schematic diagram of an image sensing device according to a seventh embodiment of the present disclosure is shown.

[0047] Figure 14 From left to right in sequence are the spherical aberration, astigmatism and distortion curves of the seventh embodiment.

[0048] Figure 15 A schematic diagram of an image sensing device according to an eighth embodiment of the present disclosure is shown.

[0049] Figure 16 From left to right in sequence are the spherical aberration, astigmatism and distortion curves of the eighth embodiment.

[0050] Figure 17 A schematic diagram of an image sensing device according to a ninth embodiment of the present disclosure is shown.

[0051] Figure 18 From left to right in sequence are the spherical aberration, astigmatism and distortion curves of the ninth embodiment.

[0052] Figure 19 A schematic diagram of an image sensing device according to a tenth embodiment of the present disclosure is shown.

[0053] Figure 20 From left to right in sequence are the spherical aberration, astigmatism and distortion curves of the tenth embodiment.

[0054] Figure 21 A schematic diagram of an image sensing device according to an eleventh embodiment of the present disclosure is shown.

[0055] Figure 22 From left to right in sequence are the spherical aberration, astigmatism and distortion curves of the eleventh embodiment.

[0056] Figure 23 A schematic diagram of an image sensing device according to a twelfth embodiment of the present disclosure is shown.

[0057] Figure 24 From left to right in sequence are the spherical aberration, astigmatism and distortion curves of the twelfth embodiment.

[0058] Figure 25 A perspective view of an image sensing device according to a thirteenth embodiment of the present disclosure is shown.

[0059] Figure 26 A perspective view of one side of an electronic device according to a fourteenth embodiment of the present disclosure is shown.

[0060] Figure 27 A perspective view of the other side of the electronic device of Figure 26 is shown.

[0061] Figure 28 schematic diagram illustrating a side of an electronic device according to the first embodiment of the present disclosure. Figure 26

[0062] Figure 29 schematic diagram illustrating a side of an electronic device according to the first embodiment of the present disclosure.

[0063] Figure 30 schematic diagram illustrating a side of an electronic device according to the first embodiment of the present disclosure. Figure 29

[0064] Figure 31 schematic diagram illustrating a side of an electronic device according to the first embodiment of the present disclosure.

[0065] Figure 32 schematic diagram illustrating a side of an electronic device according to the first embodiment of the present disclosure.

[0066] Figure 33 schematic diagram illustrating a side of an electronic device according to the first embodiment of the present disclosure.

[0067] Figure 34 schematic diagram illustrating a side of an electronic device according to the first embodiment of the present disclosure.

[0068] Figure 35 schematic diagram illustrating a side of an electronic device according to the first embodiment of the present disclosure.

[0069] Figure 36 schematic diagram illustrating a side of an electronic device according to the first embodiment of the present disclosure.

[0070]

Symbol Description

[0071] 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: image capturing device

[0072] 101: imaging lens

[0073] 102: driving device

[0074] 103: electronic photosensitive element

[0075] 104: image stabilization module

[0076] 200, 300, 400: electronic device ​​

[0077] 201, 401: flash module

[0078] 202: focus assist module

[0079] 203: image signal processor

[0080] 204, 301: display module

[0081] 205: image software processor

[0082] 206: subject

[0083] OA1: first optical axis

[0084] OA2: second optical axis

[0085] OA3: third optical axis

[0086] LF, LF1, LF2: reflective element

[0087] LG: lens group

[0088] ST: stop

[0089] S1, S2: diaphragm

[0090] E1: first lens

[0091] E2: second lens

[0092] E3: third lens

[0093] E4: fourth lens

[0094] E5: fifth lens

[0095] E6: sixth lens

[0096] E7: filter element

[0097] IMG: imaging surface

[0098] IS: electronic photosensitive element

[0099] P: inflection point

[0100] C: critical point

[0101] Y1R1: maximum effective radius of first lens object side surface

[0102] Y4R1: maximum effective radius of fourth lens object side surface DETAILED DESCRIPTION

[0103] The imaging optical lens includes six lenses, and the six lenses are sequentially arranged along an optical path from an object side to an image side as a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens. The six lenses each have an object side surface facing the object side direction and an image side surface facing the image side direction. In addition, all adjacent lenses in the imaging optical lens can not move relative to each other. In this way, the manufacturing difficulty is reduced, and the assembly yield is improved.

[0104] The first lens can have positive refractive power, thereby providing the main converging capability of the imaging optical lens, effectively compressing the space of the imaging optical lens, and achieving the miniaturization requirement. The object side surface of the first lens can be convex at a near optical axis, thereby helping to converge light rays. The image side surface of the first lens can be concave at the near optical axis, thereby helping to correct astigmatism.

[0105] The second lens has positive refractive power, thereby effectively sharing the positive refractive power of the first lens to avoid the refractive power of a single lens being too large to affect the imaging quality. The object side surface of the second lens can be convex at the near optical axis, thereby helping to receive a large range of light rays from the first lens and avoiding total reflection caused by a too large peripheral incident angle. The image side surface of the second lens can be convex at the near optical axis, thereby cooperating with the surface type of the third lens to reduce the size of the central light spot.

[0106] The third lens can have negative refractive power, thereby balancing the spherical aberration and chromatic aberration generated by the first lens and the second lens. The image side surface of the third lens can be concave at the near optical axis, thereby helping to correct spherical aberration.

[0107] The fourth lens can have negative refractive power, thereby effectively sharing the negative refractive power of the third lens to avoid the refractive power of a single lens being too large to generate too much aberration. The image side surface of the fourth lens can be concave at the near optical axis, thereby adjusting the direction of light rays and helping to adjust the volume distribution of the image side end of the imaging optical lens.

[0108] The fifth lens can have positive refractive power, thereby helping to correct spherical aberration. The object side surface of the fifth lens can be convex at the near optical axis, thereby helping to correct aberration in the imaging optical lens to maintain good imaging quality. The image side surface of the fifth lens can be concave at the near optical axis, thereby helping to shorten the back focal length.

[0109] The sixth lens can have positive refractive power, thereby helping to compress the volume of the image side end of the imaging optical lens.

[0110] The image side surface of the fourth lens has at least one inflection point, thereby helping to correct off-axis aberration in the imaging optical lens. At least one of the object side surface of the fifth lens and the image side surface of the fifth lens can have at least one inflection point, thereby helping to compress the total length of the imaging optical lens. Please refer to Figure 33Fig. 1 is a schematic diagram illustrating the inflection points P on the lens surfaces according to the first embodiment of the present disclosure. Figure 33 In some embodiments, the first lens E1 object-side surface, the first lens E1 image-side surface, the second lens E2 object-side surface, the fourth lens E4 object-side surface, and the sixth lens E6 image-side surface each has one inflection point P, and the third lens E3 object-side surface, the fourth lens E4 image-side surface, the fifth lens E5 object-side surface, the fifth lens E5 image-side surface, and the sixth lens E6 object-side surface each has two inflection points P. Figure 33 Fig. 1 is a schematic diagram illustrating the inflection points P on the lens surfaces according to the first embodiment of the present disclosure. However, in other embodiments of the present disclosure, each lens can have one or more inflection points.

[0111] The fourth lens image-side surface can have at least one critical point at an off-axis location. Thereby, it helps to correct the off-axis aberration in the imaging optical lens assembly. Please refer to Figure 33 Fig. 2 is a schematic diagram illustrating the critical points C on the lens surfaces according to the first embodiment of the present disclosure. Figure 33 In some embodiments, the fourth lens E4 object-side surface, the fourth lens E4 image-side surface, the fifth lens E5 object-side surface, the fifth lens E5 image-side surface, and the sixth lens E6 object-side surface each has one critical point C at an off-axis location, and the third lens E3 object-side surface has two critical points C at off-axis locations. Figure 33 Fig. 2 is a schematic diagram illustrating the critical points C on the lens surfaces according to the first embodiment of the present disclosure. However, in other embodiments of the present disclosure, each lens can have one or more critical points at an off-axis location.

[0112] According to the imaging optical lens assembly disclosed by the present disclosure, the interval distance between the third lens and the fourth lens on the optical axis can be the largest among the interval distances between all adjacent lenses on the optical axis in the imaging optical lens assembly. Thereby, it helps to balance the volume distribution of the object-side end and the image-side end of the imaging optical lens assembly.

[0113] There can be at least three lenses in the imaging optical lens assembly, each of which has an Abbe number greater than 5.0 and less than 27.0. Thereby, it helps to make the lens material have sufficient ability to control light, so as to balance the focusing positions of light of different wavebands and avoid the situation of image overlap.

[0114] The thickness of the fifth lens on the optical axis is CT5, and the thickness of the sixth lens on the optical axis is CT6, which can satisfy the following condition: 0.10 < CT5 / CT6 < 2.00. Thereby, the ratio of the central thickness of the fifth lens to the central thickness of the sixth lens can be adjusted, which helps to balance the volume distribution of the image-side end of the imaging optical lens assembly. In addition, the following condition can also be satisfied: 0.20 < CT5 / CT6 < 1.00. In addition, the following condition can also be satisfied: 0.28 ≤ CT5 / CT6 ≤ 0.67.

[0115] A distance on the optical axis from the sixth lens image-side surface to the imaging plane is BL, and a separation distance on the optical axis between the third lens and the fourth lens is T34, which can satisfy the following condition: 0.05 < BL / T34 < 1.25. In this way, the volume distribution of the imaging optical lens group can be balanced. The following condition can also be satisfied: 0.40 < BL / T34 < 1.20. The following condition can also be satisfied: 0.58 ≤ BL / T34 ≤ 1.13.

[0116] A focal length of the fourth lens is f4, and a focal length of the fifth lens is f5, which can satisfy the following condition: 0.05 < |f4 / f5| < 1.45. In this way, the distribution of refractive power between the fourth lens and the fifth lens can be effectively balanced, which helps to correct spherical aberration. The following condition can also be satisfied: 0.07 < |f4 / f5| < 1.20. The following condition can also be satisfied: 0.11 ≤ |f4 / f5| ≤ 0.88.

[0117] A focal length of the imaging optical lens group is f, a focal length of the fifth lens is f5, and a focal length of the sixth lens is f6, which can satisfy the following condition: 0.00 < f / f5 + f / f6 < 4.00. In this way, the refractive power at the image side end of the imaging optical lens group can be adjusted, which helps to balance the refractive power distribution of the imaging optical lens group and improve the imaging quality. The following condition can also be satisfied: 0.20 < f / f5 + f / f6 < 4.00. The following condition can also be satisfied: 0.65 < f / f5 + f / f6 < 4.00. The following condition can also be satisfied: 0.30 < f / f5 + f / f6 < 2.50. The following condition can also be satisfied: 0.50 < f / f5 + f / f6 < 1.80. The following condition can also be satisfied: 0.74 ≤ f / f5 + f / f6 ≤ 1.37.

[0118] A separation distance on the optical axis between the third lens and the fourth lens is T34, a separation distance on the optical axis between the fourth lens and the fifth lens is T45, and a separation distance on the optical axis between the fifth lens and the sixth lens is T56, which can satisfy the following condition: 0.05 < (T45 + T56) / T34 < 1.00. In this way, the arrangement of the fourth lens to the sixth lens can be made more compact to compress the total length of the imaging optical lens group. The following condition can also be satisfied: 0.15 < (T45 + T56) / T34 < 0.85. The following condition can also be satisfied: 0.21 ≤ (T45 + T56) / T34 ≤ 0.70.

[0119] The curvature radius of the object side surface of the first lens is R1, and the curvature radius of the image side surface of the first lens is R2, which can satisfy the following condition: -10.00 < (R1+R2) / (R1-R2) < 1.00. In this way, the surface shape of the first lens can be controlled, which helps to correct aberration in the imaging optical lens. The following condition can also be satisfied: -10.00 < (R1+R2) / (R1-R2) < 0.00. The following condition can also be satisfied: -5.00 < (R1+R2) / (R1-R2) < 0.50. The following condition can also be satisfied: -2.00 < (R1+R2) / (R1-R2) < 0.00. The following condition can also be satisfied: -1.77 ≤ (R1+R2) / (R1-R2) ≤ -0.92.

[0120] The focal length of the first lens is f1, and the focal length of the second lens is f2, which can satisfy the following condition: 0.30 < |f1 / f2| < 1.70. In this way, the refractive power distribution of the first lens and the second lens can be effectively balanced, which helps to avoid excessive refractive power of a single lens and reduces the imaging quality. The following condition can also be satisfied: 0.40 < |f1 / f2| < 1.30. The following condition can also be satisfied: 0.51 ≤ |f1 / f2| ≤ 0.97.

[0121] The interval distance of the second lens and the third lens on the optical axis is T23, and the interval distance of the third lens and the fourth lens on the optical axis is T34, which can satisfy the following condition: 0.02 < T23 / T34 < 1.10. In this way, it helps to increase the close arrangement of the second lens and the third lens to compress the volume. The following condition can also be satisfied: 0.02 < T23 / T34 < 0.50. The following condition can also be satisfied: 0.03 ≤ T23 / T34 ≤ 0.25.

[0122] The distance of the image side surface of the sixth lens to the imaging surface on the optical axis is BL, and the distance of the object side surface of the fourth lens to the image side surface of the sixth lens on the optical axis is Dr7r12, which can satisfy the following condition: 0.15 < BL / Dr7r12 < 0.75. In this way, it helps to compress the back focal length. The following condition can also be satisfied: 0.25 < BL / Dr7r12 < 0.65. The following condition can also be satisfied: 0.33 ≤ BL / Dr7r12 ≤ 0.62.

[0123] The Abbe number of the third lens is V3, and the Abbe number of the fifth lens is V5, which can satisfy the following condition: 20.0 < V3+V5 < 60.0. In this way, the convergence ability between different wave bands can be balanced to correct chromatic aberration. The following condition can also be satisfied: 30.0 < V3+V5 < 55.0. The following condition can also be satisfied: 36.4 ≤ V3+V5 ≤ 50.8.

[0124] The focal length of the second lens is f2, and the focal length of the fourth lens is f4, which can satisfy the following condition: 0.05<|f4 / f2|<1.25. In this way, the refractive power of the second lens and the fourth lens can be effectively adjusted, which helps to reduce the sensitivity of a single lens and improve the assembly yield. The following condition can also be satisfied: 0.35<|f4 / f2|<1.10. The following condition can also be satisfied: 0.49≤|f4 / f2|≤0.92.

[0125] The maximum viewing angle in the imaging optical lens is FOV, which can satisfy the following condition: 25.0 degrees<FOV<47.0 degrees. In this way, it is helpful to control the imaging range of the imaging optical lens to meet the more extensive use requirements. The following condition can also be satisfied: 30.0 degrees<FOV<45.0 degrees.

[0126] The Abbe number of the sixth lens is V6, which can satisfy the following condition: 10.0<V6<26.0. In this way, it is helpful to correct chromatic aberration. The following condition can also be satisfied: 15.0<V6<23.0.

[0127] The thickness of the first lens on the optical axis is CT1, the distance from the object side surface of the second lens to the imaging surface on the optical axis is Dr3I, 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: 2.00<(CT1+Dr3I) / ImgH<4.00. In this way, it is helpful to balance the compression of the total length and the increase of the imaging surface to meet the miniaturization requirements. The following condition can also be satisfied: 2.30<(CT1+Dr3I) / ImgH<3.70.

[0128] 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 condition: -10.00<(R3+R4) / (R3-R4)<0.40. In this way, the surface shape and refractive power of the second lens can be adjusted in combination with the surface shape of the first lens to avoid total reflection caused by too large incident angle of light on the second lens. The following condition can also be satisfied: -5.00<(R3+R4) / (R3-R4)<0.00. The following condition can also be satisfied: -2.00<(R3+R4) / (R3-R4)<-0.10.

[0129] The focal length of the imaging optical lens is f, and the entrance pupil diameter of the imaging optical lens is EPD, which can satisfy the following condition: f / EPD<2.00. In this way, the light entrance aperture of the lens can be effectively adjusted to control the amount of light entering the imaging optical lens, thereby improving the image brightness. The following condition can also be satisfied: 1.00<f / EPD<1.90.

[0130] A thickness of the first lens on the optical axis is CT1, and a thickness of the sixth lens on the optical axis is CT6, which can satisfy the following condition: 0.30 < CT1 / CT6 < 2.50. In this way, the ratio of the central thickness of the first lens to the central thickness of the sixth lens can be adjusted to balance the manufacturing yield rate and the imaging quality of the central field of view. The following condition can also be satisfied: 0.50 < CT1 / CT6 < 1.50.

[0131] A separation distance of the third lens and the fourth lens on the optical axis is T34, and a separation distance of the fifth lens and the sixth lens on the optical axis is T56, which can satisfy the following condition: 0.10 ≤ T56 / T34 < 1.00. In this way, the spatial distribution in the imaging optical lens assembly is controlled to reduce the sensitivity and improve the lens performance.

[0132] A separation distance of the first lens and the second lens on the optical axis is T12, a separation distance of the second lens and the third lens on the optical axis is T23, a separation distance of the third lens and the fourth lens on the optical axis is T34, a separation distance of the fourth lens and the fifth lens on the optical axis is T45, and a separation distance of the fifth lens and the sixth lens on the optical axis is T56, which can satisfy the following condition: 1.00 < (T12+T34) / (T23+T45+T56) < 5.00. In this way, the volume distribution of the imaging optical lens assembly is balanced to reduce the manufacturing difficulty. The following condition can also be satisfied: 1.00 < (T12+T34) / (T23+T45+T56) < 4.50.

[0133] A focal length of the third lens is f3, and a focal length of the fourth lens is f4, which can satisfy the following condition: 0.30 < |f3 / f4| < 1.30. In this way, the distribution of the refractive power between the third lens and the fourth lens is effectively balanced to help ensure that the third lens has sufficient light path control capability to regulate the light path direction at the object side. The following condition can also be satisfied: 0.50 < |f3 / f4| < 1.20.

[0134] A thickness of the first lens on the optical axis is CT1, and a thickness of the second lens on the optical axis is CT2, which can satisfy the following condition: 0.40 < CT1 / CT2 < 3.00. In this way, the ratio of the central thickness of the first lens to the central thickness of the second lens is adjusted to reduce the sensitivity to manufacturing tolerances. The following condition can also be satisfied: 0.60 < CT1 / CT2 < 2.50.

[0135] A distance from the image side surface of the sixth lens to the imaging surface on the optical axis is BL, and a focal length of the imaging optical lens assembly is f, which can satisfy the following condition: 0.05 < BL / f < 0.30. In this way, the back focal length is shortened to reduce the overall length of the imaging optical lens assembly. The following condition can also be satisfied: 0.08 < BL / f < 0.25.

[0136] The distance on the optical axis from the first lens object side surface to the sixth lens image side surface is TD, and the maximum image height of the imaging optical lens is ImgH, which can satisfy the following condition: 1.90 < TD / ImgH < 3.80. In this way, the light receiving area can be ensured to be sufficient while the total length of the imaging optical lens is compressed, so as to avoid the vignetting at the image periphery. The following condition can also be satisfied: 2.00 < TD / ImgH < 3.50.

[0137] The total thickness of all the lenses in the imaging optical lens on the optical axis is ΣCT, and the distance on the optical axis from the first lens object side surface to the sixth lens image side surface is TD, which can satisfy the following condition: 0.50 < ΣCT / TD < 0.75. In this way, the volume utilization of the imaging optical lens can be adjusted.

[0138] The distance on the optical axis from the first lens object side surface to the imaging surface is TL, and the focal length of the imaging optical lens is f, which can satisfy the following condition: 0.80 < TL / f < 1.30. In this way, the imaging optical lens can have better telephoto capability. The following condition can also be satisfied: 0.85 < TL / f < 1.20.

[0139] The distance on the optical axis from the sixth lens image side surface to the imaging surface is BL, and the thickness of the second lens on the optical axis is CT2, which can satisfy the following condition: 0.20 < BL / CT2 < 2.00. In this way, the second lens can be prevented from being too thin, thereby affecting the imaging quality. The following condition can also be satisfied: 0.70 < BL / CT2 < 2.00. The following condition can also be satisfied: 0.50 < BL / CT2 < 1.80. The following condition can also be satisfied: 0.75 < BL / CT2 < 1.80.

[0140] The interval distance on the optical axis between the first lens and the second lens is T12, the interval distance on the optical axis between the fourth lens and the fifth lens is T45, and the interval distance on the optical axis between the fifth lens and the sixth lens is T56, which can satisfy the following condition: 0.40 < T56 / (T12+T45) < 5.00. In this way, the spatial distribution in the imaging optical lens can be adjusted to reduce the error caused by assembly. The following condition can also be satisfied: 0.40 < T56 / (T12+T45) < 3.50.

[0141] The maximum effective radius of the first lens object side surface is Y1R1, and the maximum effective radius of the fourth lens object side surface is Y4R1, which can satisfy the following condition: 1.00 < Y1R1 / Y4R1 < 5.00. In this way, the effective diameter ratio of the lenses can be adjusted to help control the field of view angle to obtain better telephoto capability. The following condition can also be satisfied: 1.00 < Y1R1 / Y4R1 < 3.00. Please refer to Figure 32Fig. 1 is a schematic diagram illustrating parameters Y1R1 and Y4R1 according to a first embodiment of the present disclosure.

[0142] The technical features of the imaging optical lens assemblies disclosed in the present disclosure can be combined to achieve corresponding effects.

[0143] In the imaging optical lens assemblies disclosed in the present disclosure, the lens material can be glass or plastic. If the lens material is glass, the freedom of the refractive power configuration of the imaging optical lens assembly can be increased, and the influence of the change of the external environment temperature on the imaging can be reduced. The glass lens can be manufactured by grinding or molding. If the lens material is plastic, the production cost can be effectively reduced. In addition, a spherical surface or an aspherical surface (ASP) can be arranged on the lens surface. The spherical lens can reduce the manufacturing difficulty. If the aspherical surface is arranged on the lens surface, more control variables can be obtained to reduce the aberration, reduce the number of lenses, and effectively reduce the total length of the imaging optical lens assembly. Further, the aspherical surface can be manufactured by plastic injection molding or molded glass lens.

[0144] In the imaging optical optical lens assemblies disclosed in the present disclosure, if the lens surface is an aspherical surface, it means that all or part of the optical effective area of the lens surface is an aspherical surface.

[0145] In the imaging optical lens assemblies disclosed in the present disclosure, additives can be selectively added to any of the above lens materials to produce light absorption or light interference effects, so as to change the transmittance of the lens to specific waveband light, thereby reducing stray light and color cast. For example, the additives can have the function of filtering out 600-800 nm waveband light in the system, so as to help reduce excess red light or infrared light; or can filter out 350-450 nm waveband light to reduce excess blue light or ultraviolet light. Therefore, the additives can avoid the interference of specific waveband light on imaging. In addition, the additives can be uniformly mixed in the plastic and manufactured into lenses by injection molding technology. In addition, the additives can also be configured on the coating on the lens surface to provide the above effects.

[0146] In the imaging optical lens assemblies disclosed in the present disclosure, if the lens surface is a convex surface 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 a concave surface 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, 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.

[0147] In the disclosed imaging optical lens assembly, the inflection point of the lens surface refers to the intersection point of the positive and negative changes of the curvature of the lens surface. The critical point of the lens surface refers to the tangent point on the tangent line of the tangent of the lens surface perpendicular to the optical axis, and the critical point is not located on the optical axis.

[0148] In the disclosed imaging optical lens assembly, the imaging surface of the imaging optical lens assembly can be a plane or a curved surface with any curvature, especially a concave surface facing the object side, according to the corresponding electronic photosensitive element.

[0149] In the disclosed imaging optical lens assembly, one or more imaging correction elements (flat field elements, etc.) can be selectively arranged between the lens closest to the imaging surface and the imaging surface in the imaging light path to achieve the effect of correcting the image (image curvature, etc.). The optical properties of the imaging correction element, such as curvature, thickness, refractive index, position, surface type (convex or concave, spherical or aspherical, diffractive surface, and Fresnel surface, etc.), can be adjusted according to the requirements of the image capturing device. Generally, the preferred imaging correction element is a thin flat concave element with a concave surface facing the object side arranged close to the imaging surface.

[0150] In the disclosed imaging optical lens assembly, at least one element with a light path turning function, such as a prism or a mirror, can be selectively arranged between the object and the imaging surface in the imaging light path. The prism surface or mirror surface can be a plane, a spherical surface, an aspherical surface, or a free-form surface, etc. to provide higher flexibility in the spatial arrangement of the imaging optical lens assembly, so that the thinness of the electronic device is not limited by the total optical length of the imaging optical lens assembly. For further illustration, please refer to Figure 34 and Figure 35 wherein Figure 34 is a schematic diagram showing a configuration relationship of a light path turning element in an imaging optical lens assembly according to the present disclosure, and Figure 35 is a schematic diagram showing another configuration relationship of a light path turning element in an imaging optical lens assembly according to the present disclosure. As shown in Figure 34 and Figure 35 , the imaging optical lens assembly can have a first optical axis OA1, a light path turning element LF, and a second optical axis OA2 in sequence along the light path from the object (not shown) to the imaging surface IMG. The light path turning element LF can be arranged between the object and the lens group LG of the imaging optical lens assembly as shown in Figure 34 , or arranged between the lens group LG of the imaging optical lens assembly and the imaging surface IMG as shown in Figure 35 . In addition, please refer to Figure 36 , which is a schematic diagram showing a configuration relationship of two light path turning elements in an imaging optical lens assembly according to the present disclosure, as shown in Figure 36As shown, the imaging optical system can also have a first optical axis OA1, a first light path turning element LF1 disposed between the object and the lens group LG of the imaging optical system, a second optical axis OA2, a second light path turning element LF2 disposed between the lens group LG of the imaging optical system and the image plane IMG, and a third optical axis OA3, in which the direction of travel of the light rays in the first optical axis OA1 can be as shown in Figure 36 As shown, the direction of travel of the light rays in the third optical axis OA3 is the same as the direction of travel of the light rays in the first optical axis OA1. The imaging optical system can also selectively have more than three light path turning elements, and the present disclosure is not limited to the types, numbers, and positions of the light path turning elements shown in the drawings.

[0151] The imaging optical system disclosed in the present disclosure can have at least one diaphragm, which can be disposed before the first lens, between the lenses, or after the last lens. The diaphragm can be a glare stop or a field stop, for example, and can be used to reduce stray light and improve image quality.

[0152] The imaging optical system disclosed in the present disclosure can have a front aperture or a middle aperture. The front aperture means that the aperture is disposed between the object and the first lens, and the middle aperture means that the aperture is disposed between the first lens and the image plane. If the aperture is a front aperture, the exit pupil and the image plane can have a longer distance, which can have a telecentric effect and can increase the efficiency of the CCD or CMOS image sensor; if the aperture is a middle aperture, it can help to increase the field of view of the imaging optical system.

[0153] The present disclosure can appropriately provide a variable aperture element, which can be a mechanical member or a light control element that can control the size and shape of the aperture by electricity or electrical signals. The mechanical member can include movable members such as a blade group or a shield plate, and the light control element can include a light filter element, an electrochromic material, a liquid crystal layer, or a shielding material. The variable aperture element can enhance the ability to adjust the image by controlling the amount of light entering the image or the exposure time. In addition, the variable aperture element can also be an aperture of the present disclosure, which can adjust the image quality such as the depth of field or the exposure speed by changing the aperture value.

[0154] The present disclosure can appropriately place one or more optical elements, in order to limit the form of light passing through the imaging optical lens assembly. The optical elements can be optical filters, polarizing plates, etc., but the present disclosure is not limited thereto. Moreover, the optical elements can be single elements, composite components, or presented in the form of films, etc., but the present disclosure is not limited thereto. The optical elements can be placed at the object end, the image end, or between lenses of the imaging optical lens assembly, in order to control the form of light passing therethrough, thereby meeting the application requirements.

[0155] In the imaging optical lens assembly disclosed by the present disclosure, at least one optical lens, optical element, or carrier has at least one surface with a low reflection layer, which can effectively reduce stray light generated by reflection of light at the interface. The low reflection layer can be disposed on the non-effective area of the object side surface or the image side surface of the optical lens, or the connecting surface between the object side surface and the image side surface. The optical element can be a light shielding element, a ring-shaped spacing element, a lens barrel element, a cover glass, a blue glass, a filter element, a color filter, a light path turning element (reflective element), a prism, a mirror, etc. The carrier can be a lens group holder, a micro lens disposed on a photosensitive element, a substrate periphery of a photosensitive element, or a glass sheet for protecting a photosensitive element, etc.

[0156] In the imaging optical lens assembly disclosed by the present disclosure, the object side and the image side are determined according to the direction of the optical axis, and the data on the optical axis is calculated along the optical axis. If the optical axis is turned by a light path turning element, the data on the optical axis is also calculated along the optical axis.

[0157] According to the above-mentioned embodiments, the following specific examples are proposed in detail with reference to the accompanying drawings.

[0158] <First Embodiment>

[0159] Please refer to Figures 1 to 2 , wherein Figure 1 The schematic diagram of the image capturing device according to the first embodiment of the present disclosure is shown in Figure 2 The spherical aberration, astigmatism, and distortion curves of the first embodiment are sequentially shown from left to right. The spherical aberration curve is shown in Figure 1As shown in FIG. 1, the image capturing device 1 includes an imaging optical lens assembly (not labeled separately) and an electronic image sensor IS. The imaging optical lens assembly includes, in order from the object side to the image side along the optical path, an aperture stop ST, a first lens E1, a second lens E2, a third lens E3, a stop S1, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter E7, and an imaging surface IMG. The electronic image sensor IS is disposed on the imaging surface IMG. The imaging optical lens assembly includes six lenses (E1, E2, E3, E4, E5, E6) and no other lenses are interposed between the lenses. In addition, all adjacent lenses in the imaging optical lens assembly do not move relative to each other.

[0160] The first lens E1 has positive refractive power and is made of plastic. The object side surface of the first lens E1 is convex at the vicinity of the optical axis, and the image side surface of the first lens E1 is concave at the vicinity of the optical axis. Both surfaces of the first lens E1 are aspheric surfaces. The object side surface of the first lens E1 has one inflection point, and the image side surface of the first lens E1 has one inflection point.

[0161] The second lens E2 has positive refractive power and is made of plastic. The object side surface of the second lens E2 is convex at the vicinity of the optical axis, and the image side surface of the second lens E2 is convex at the vicinity of the optical axis. Both surfaces of the second lens E2 are aspheric surfaces. The object side surface of the second lens E2 has one inflection point.

[0162] The third lens E3 has negative refractive power and is made of plastic. The object side surface of the third lens E3 is convex at the vicinity of the optical axis, and the image side surface of the third lens E3 is concave at the vicinity of the optical axis. Both surfaces of the third lens E3 are aspheric surfaces. The object side surface of the third lens E3 has two inflection points, and the object side surface of the third lens E3 has two critical points at the off-axis position.

[0163] The fourth lens E4 has negative refractive power and is made of plastic. The object side surface of the fourth lens E4 is convex at the vicinity of the optical axis, and the image side surface of the fourth lens E4 is concave at the vicinity of the optical axis. Both surfaces of the fourth lens E4 are aspheric surfaces. The object side surface of the fourth lens E4 has one inflection point, the image side surface of the fourth lens E4 has two inflection points, the object side surface of the fourth lens E4 has one critical point at the off-axis position, and the image side surface of the fourth lens E4 has one critical point at the off-axis position.

[0164] The fifth lens E5 has positive refractive power and is made of plastic. The object side surface of the fifth lens E5 is convex at the vicinity of the optical axis, and the image side surface of the fifth lens E5 is concave at the vicinity of the optical axis. Both surfaces of the fifth lens E5 are aspheric surfaces. The object side surface of the fifth lens E5 has two inflection points, the image side surface of the fifth lens E5 has two inflection points, the object side surface of the fifth lens E5 has one critical point at the off-axis position, and the image side surface of the fifth lens E5 has one critical point at the off-axis position.

[0165] The sixth lens E6 has positive refractive power and is made of plastic. The object side surface of the sixth lens E6 is convex at the vicinity of the optical axis, and the image side surface of the sixth lens E6 is convex at the vicinity of the optical axis. Both surfaces of the sixth lens E6 are aspheric surfaces. The object side surface of the sixth lens E6 has two inflection points, the image side surface of the sixth lens E6 has one inflection point, and the object side surface of the sixth lens E6 has one critical point at the off-axis position.

[0166] The filter element E7 is made of glass, which is disposed between the sixth lens E6 and the imaging surface IMG, and does not affect the focal length of the imaging optical lens.

[0167] In the present embodiment, the interval distance on the optical axis between the third lens E3 and the fourth lens E4 is the largest among the interval distances on the optical axis between all adjacent lenses in the imaging optical lens. That is, the interval distance on the optical axis between the third lens E3 and the fourth lens E4 is greater than the interval distance on the optical axis between the first lens E1 and the second lens E2, the interval distance on the optical axis between the second lens E2 and the third lens E3, the interval distance on the optical axis between the fourth lens E4 and the fifth lens E5, and the interval distance on the optical axis between the fifth lens E5 and the sixth lens E6.

[0168] The Abbe number of each of the at least three lenses in the imaging optical lens is greater than 5.0 and less than 27.0. In the present embodiment, the Abbe number of the third lens E3, the Abbe number of the fifth lens E5, and the Abbe number of the sixth lens E6 are all greater than 5.0 and less than 27.0.

[0169] The curve equation of the aspheric surface of each lens is represented as follows:

[0170]

[0171] X: displacement of the intersection point of the aspheric surface and the optical axis to the point on the aspheric surface which is Y away from the optical axis and parallel to the optical axis;

[0172] Y: perpendicular distance of the point on the aspheric curve to the optical axis;

[0173] R: radius of curvature;

[0174] k: conic coefficient; and

[0175] Ai: aspheric coefficient of the i-th order.

[0176] In the imaging optical lens of the first embodiment, the focal length of the imaging optical lens is f, the F-number of the imaging optical lens is Fno, and half of the maximum view angle of the imaging optical lens is HFOV, which have the following values: f = 8.36 millimeters (mm), Fno = 1.81, and HFOV = 16.5 degrees (deg.).

[0177] The maximum view angle of the imaging optical lens is FOV, which satisfies the following condition: FOV = 33.0 degrees.

[0178] The distance on the optical axis between the object-side surface of the first lens E1 and the image-side surface of the sixth lens E6 is TD, and the maximum imaging height of the imaging optical lens is ImgH, which satisfy the following condition: TD / ImgH = 2.70.

[0179] A thickness of the first lens E1 on the optical axis is CT1, a distance from the object side surface of the second lens E2 to the imaging plane IMG on the optical axis is Dr3I, a maximum imaging height of the imaging optical lens is ImgH, and the following condition is satisfied: (CT1+Dr3I) / ImgH=3.10.

[0180] A distance from the object side surface of the first lens E1 to the imaging plane IMG on the optical axis is TL, a focal length of the imaging optical lens is f, and the following condition is satisfied: TL / f=0.93.

[0181] A distance from the image side surface of the sixth lens E6 to the imaging plane IMG on the optical axis is BL, a focal length of the imaging optical lens is f, and the following condition is satisfied: BL / f=0.12.

[0182] A focal length of the imaging optical lens is f, and an entrance pupil diameter of the imaging optical lens is EPD, and the following condition is satisfied: f / EPD=1.81.

[0183] A focal length of the first lens E1 is f1, and a focal length of the second lens E2 is f2, and the following condition is satisfied: |f1 / f2|=0.85.

[0184] A focal length of the second lens E2 is f2, and a focal length of the fourth lens E4 is f4, and the following condition is satisfied: |f4 / f2|=0.66.

[0185] A focal length of the third lens E3 is f3, and a focal length of the fourth lens E4 is f4, and the following condition is satisfied: |f3 / f4|=0.92.

[0186] A focal length of the fourth lens E4 is f4, and a focal length of the fifth lens E5 is f5, and the following condition is satisfied: |f4 / f5|=0.41.

[0187] A focal length of the imaging optical lens is f, a focal length of the fifth lens E5 is f5, and a focal length of the sixth lens E6 is f6, and the following condition is satisfied: f / f5+f / f6=1.12.

[0188] A radius of curvature of the object side surface of the first lens E1 is R1, and a radius of curvature of the image side surface of the first lens E1 is R2, and the following condition is satisfied: (R1+R2) / (R1-R2)=-1.61.

[0189] A radius of curvature of the object side surface of the second lens E2 is R3, and a radius of curvature of the image side surface of the second lens E2 is R4, and the following condition is satisfied: (R3+R4) / (R3-R4)=-0.79.

[0190] A distance from the image side surface of the sixth lens E6 to the imaging plane IMG on the optical axis is BL, and a thickness of the second lens E2 on the optical axis is CT2, and the following condition is satisfied: BL / CT2=0.93.

[0191] The distance on the optical axis from the image side surface of the sixth lens E6 to the imaging plane IMG is BL, and the interval distance on the optical axis between the third lens E3 and the fourth lens E4 is T34, which satisfies the following condition: BL / T34 = 0.69. In the present embodiment, the interval distance on the optical axis between two adjacent lenses means the interval on the optical axis between two adjacent lens surfaces of the two adjacent lenses.

[0192] The distance on the optical axis from the image side surface of the sixth lens E6 to the imaging plane IMG is BL, and the distance on the optical axis from the object side surface of the fourth lens E4 to the image side surface of the sixth lens E6 is Dr7r12, which satisfies the following condition: BL / Dr7r12 = 0.41.

[0193] The total thickness on the optical axis of all the lenses in the imaging optical lens assembly is ΣCT, and the distance on the optical axis from the object side surface of the first lens E1 to the image side surface of the sixth lens E6 is TD, which satisfies the following condition: ΣCT / TD = 0.59. In the present embodiment, ΣCT is the total thickness on the optical axis of the first lens E1, the second lens E2, the third lens E3, the fourth lens E4, the fifth lens E5 and the sixth lens E6.

[0194] The thickness on the optical axis of the first lens E1 is CT1, and the thickness on the optical axis of the second lens E2 is CT2, which satisfies the following condition: CT1 / CT2 = 0.96.

[0195] The thickness on the optical axis of the first lens E1 is CT1, and the thickness on the optical axis of the sixth lens E6 is CT6, which satisfies the following condition: CT1 / CT6 = 1.26.

[0196] The thickness on the optical axis of the fifth lens E5 is CT5, and the thickness on the optical axis of the sixth lens E6 is CT6, which satisfies the following condition: CT5 / CT6 = 0.44.

[0197] The interval distance on the optical axis between the first lens E1 and the second lens E2 is T12, the interval distance on the optical axis between the second lens E2 and the third lens E3 is T23, the interval distance on the optical axis between the third lens E3 and the fourth lens E4 is T34, the interval distance on the optical axis between the fourth lens E4 and the fifth lens E5 is T45, and the interval distance on the optical axis between the fifth lens E5 and the sixth lens E6 is T56, which satisfies the following condition: (T12+T34) / (T23+T45+T56) = 1.26.

[0198] The interval distance on the optical axis between the second lens E2 and the third lens E3 is T23, and the interval distance on the optical axis between the third lens E3 and the fourth lens E4 is T34, which satisfies the following condition: T23 / T34 = 0.17.

[0199] The interval distance of the third lens E3 and the fourth lens E4 on the optical axis is T34, and the interval distance of the fifth lens E5 and the sixth lens E6 on the optical axis is T56, which satisfy the following condition: T56 / T34=0.45.

[0200] The interval distance of the first lens E1 and the second lens E2 on the optical axis is T12, the interval distance of the fourth lens E4 and the fifth lens E5 on the optical axis is T45, and the interval distance of the fifth lens E5 and the sixth lens E6 on the optical axis is T56, which satisfy the following condition: T56 / (T12+T45)=2.03.

[0201] The interval distance of the third lens E3 and the fourth lens E4 on the optical axis is T34, the interval distance of the fourth lens E4 and the fifth lens E5 on the optical axis is T45, and the interval distance of the fifth lens E5 and the sixth lens E6 on the optical axis is T56, which satisfy the following condition: (T45+T56) / T34=0.64.

[0202] The Abbe number of the third lens E3 is V3, and the Abbe number of the fifth lens E5 is V5, which satisfy the following condition: V3+V5=39.9.

[0203] The Abbe number of the sixth lens E6 is V6, which satisfy the following condition: V6=19.5.

[0204] 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, which satisfy the following condition: Y1R1 / Y4R1=1.98.

[0205] Please refer to Table 1A and Table 1B below.

[0206]

[0207]

[0208]

[0209]

[0210] Table 1A is Figure 1 The detailed structure data of the first embodiment, wherein the units of the curvature radius, the thickness and the focal length are millimeter (mm), and the surfaces 0 to 17 represent the surfaces from the object side to the image side in sequence. Table 1B is the aspheric surface data in the first embodiment, wherein k is the conic coefficient in the aspheric surface equation, and A4 to A28 represent the aspheric surface coefficients of the 4th to 28th orders of each surface. In addition, the tables of the following embodiments are corresponding to the schematic diagrams and the aberration curve diagrams of the embodiments, and the definitions of the data in the tables are the same as those of Table 1A and Table 1B of the first embodiment, which are not described herein.

[0211] <Second Embodiment>

[0212] Please refer to Figures 3 to 4 wherein Figure 3 Fig. 2 shows a schematic diagram of an image capturing device according to the second embodiment of the present disclosure, Figure 4 Fig. 2 shows a schematic diagram of an image capturing device according to the second embodiment of the present disclosure, Figure 3 As shown in Fig. 2, the image capturing device 2 comprises an imaging optical lens assembly (not labeled separately) and an electronic image sensor IS. The imaging optical lens assembly comprises, in order from the object side to the image side along the optical path, a stop ST, a first lens E1, a second lens E2, a third lens E3, a diaphragm S1, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter element E7, and an image plane IMG. The electronic image sensor IS is disposed on the image plane IMG. The imaging optical lens assembly comprises six lenses (E1, E2, E3, E4, E5, E6) and no other lenses are interposed between the lenses. In addition, all adjacent lenses in the imaging optical lens assembly do not move relative to each other.

[0213] The first lens E1 has positive refractive power and is made of plastic material. The object side surface thereof is convex at the vicinity of the optical axis, and the image side surface thereof is concave at the vicinity of the optical axis. Both surfaces thereof are aspheric surfaces, and the image side surface thereof has five inflection points.

[0214] The second lens E2 has positive refractive power and is made of plastic material. The object side surface thereof is convex at the vicinity of the optical axis, and the image side surface thereof is convex at the vicinity of the optical axis. Both surfaces thereof are aspheric surfaces, the object side surface thereof has one inflection point, and the image side surface thereof has three inflection points.

[0215] The third lens E3 has negative refractive power and is made of plastic material. The object side surface thereof is convex at the vicinity of the optical axis, and the image side surface thereof is concave at the vicinity of the optical axis. Both surfaces thereof are aspheric surfaces, the object side surface thereof has two inflection points, and the object side surface thereof has two critical points at the off-axis position.

[0216] The fourth lens E4 has negative refractive power and is made of plastic material. The object side surface thereof is concave at the vicinity of the optical axis, and the image side surface thereof is concave at the vicinity of the optical axis. Both surfaces thereof are aspheric surfaces, the image side surface thereof has two inflection points, and the image side surface thereof has one critical point at the off-axis position.

[0217] The fifth lens E5 has positive refractive power and is made of plastic material. The object side surface thereof is convex at the vicinity of the optical axis, and the image side surface thereof is convex at the vicinity of the optical axis. Both surfaces thereof are aspheric surfaces, the object side surface thereof has two inflection points, the image side surface thereof has one inflection point, and the object side surface thereof has one critical point at the off-axis position.

[0218] The sixth lens E6 has a negative refractive power and is made of plastic. The object-side surface of the sixth lens E6 is convex at the vicinity of the optical axis, and the image-side surface of the sixth lens E6 is concave at the vicinity of the optical axis. Both surfaces of the sixth lens E6 are aspherical. The object-side surface of the sixth lens E6 has two inflection points, and the image-side surface of the sixth lens E6 has one inflection point. The object-side surface of the sixth lens E6 has one critical point at the off-axis position, and the image-side surface of the sixth lens E6 has one critical point at the off-axis position.

[0219] The filter element E7 is made of glass and is disposed between the sixth lens E6 and the image plane IMG, and does not affect the focal length of the imaging optical lens.

[0220] In the present embodiment, the interval distance between the third lens E3 and the fourth lens E4 on the optical axis is the largest among the interval distances between the adjacent lenses on the optical axis in the imaging optical lens.

[0221] The Abbe number of each of the at least three lenses in the imaging optical lens is greater than 5.0 and less than 27.0. In detail, in the present embodiment, the Abbe number of the third lens E3, the Abbe number of the fourth lens E4, the Abbe number of the fifth lens E5, and the Abbe number of the sixth lens E6 are all greater than 5.0 and less than 27.0.

[0222] Please refer to Table 2A and Table 2B below.

[0223]

[0224]

[0225]

[0226] In the second embodiment, the aspherical surface is represented by the same form as that of the first embodiment. In addition, the definitions described in Table 2C below are the same as those of the first embodiment, and are not described herein.

[0227]

[0228]

[0229] <Third Embodiment>

[0230] Please refer to Figures 5 to 6 wherein Figure 5 a schematic diagram of an image capturing device according to the third embodiment of the present disclosure is shown, Figure 6 the ball aberration, the astigmatism, and the distortion curves of the third embodiment are sequentially shown from left to right. The ball aberration curve of the third embodiment is shown in FIG. 8A, the astigmatism curve of the third embodiment is shown in FIG. 8B, and the distortion curve of the third embodiment is shown in FIG. 8C. Figure 5It is known that the image capturing device 3 comprises an imaging optical lens set (not labeled separately) and an electronic photosensitive element IS. The imaging optical lens set comprises, in order from the object side to the image side along the optical path, an aperture stop ST, a first lens E1, a second lens E2, a third lens E3, a diaphragm S1, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter element E7, and an imaging surface IMG. The electronic photosensitive element IS is disposed on the imaging surface IMG. The imaging optical lens set comprises six lenses (E1, E2, E3, E4, E5, E6), and there are no other lenses interposed between the lenses. In addition, all adjacent lenses in the imaging optical lens set do not move relative to each other.

[0231] The first lens E1 has positive refractive power and is made of plastic. The object side surface thereof is convex at the vicinity of the optical axis, and the image side surface thereof is concave at the vicinity of the optical axis. Both surfaces thereof are aspherical surfaces. The object side surface thereof has one inflection point, and the image side surface thereof has five inflection points.

[0232] The second lens E2 has positive refractive power and is made of plastic. The object side surface thereof is convex at the vicinity of the optical axis, and the image side surface thereof is convex at the vicinity of the optical axis. Both surfaces thereof are aspherical surfaces. The object side surface thereof has one inflection point, and the image side surface thereof has one inflection point.

[0233] The third lens E3 has negative refractive power and is made of plastic. The object side surface thereof is concave at the vicinity of the optical axis, and the image side surface thereof is concave at the vicinity of the optical axis. Both surfaces thereof are aspherical surfaces. The object side surface thereof has one inflection point, and the object side surface thereof has one critical point at the off-axis position.

[0234] The fourth lens E4 has negative refractive power and is made of plastic. The object side surface thereof is concave at the vicinity of the optical axis, and the image side surface thereof is concave at the vicinity of the optical axis. Both surfaces thereof are aspherical surfaces. The image side surface thereof has two inflection points, and the image side surface thereof has one critical point at the off-axis position.

[0235] The fifth lens E5 has positive refractive power and is made of plastic. The object side surface thereof is convex at the vicinity of the optical axis, and the image side surface thereof is convex at the vicinity of the optical axis. Both surfaces thereof are aspherical surfaces. The object side surface thereof has two inflection points, the image side surface thereof has one inflection point, and the object side surface thereof has one critical point at the off-axis position.

[0236] The sixth lens E6 has positive refractive power and is made of plastic. The object side surface thereof is convex at the vicinity of the optical axis, and the image side surface thereof is concave at the vicinity of the optical axis. Both surfaces thereof are aspherical surfaces. The object side surface thereof has two inflection points, the image side surface thereof has one inflection point, the object side surface thereof has two critical points at the off-axis position, and the image side surface thereof has one critical point at the off-axis position.

[0237] The filter element E7 is made of glass and is located between the sixth lens E6 and the imaging plane IMG. It does not affect the focal length of the imaging optical lens group.

[0238] In this embodiment, the distance between the third lens E3 and the fourth lens E4 on the optical axis is the largest among the distances between all adjacent lenses on the optical axis in the imaging optical lens group.

[0239] In the imaging optical lens group, at least three lenses each have an Abbe number greater than 5.0 and less than 27.0. Specifically, in this embodiment, the Abbe numbers of the third lens E3, the fourth lens E4, the fifth lens E5, and the sixth lens E6 are all greater than 5.0 and less than 27.0.

[0240] Please refer to Table 3A and Table 3B below.

[0241]

[0242]

[0243]

[0244]

[0245] In the third embodiment, the equation for the aspherical curve is expressed as in the first embodiment. Furthermore, the definitions described in Table 3C below are the same as in the first embodiment and will not be repeated here.

[0246]

[0247] <Fourth Embodiment>

[0248] 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 8 From left to right, the graphs show the spherical aberration, astigmatism, and distortion curves of the fourth embodiment. Figure 7 As can be seen, the image capturing device 4 includes an imaging optical lens group (unlabeled) and an electronic photosensitive element IS. The imaging optical lens group, arranged sequentially from the object side to the image side along the optical path, includes an aperture stop S1, a first lens E1, a second lens E2, an aperture ST, a third lens E3, an aperture stop S2, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter element E7, and an imaging surface IMG. The electronic photosensitive element IS is disposed on the imaging surface IMG. The imaging optical lens group contains six lenses (E1, E2, E3, E4, E5, E6), and there are no other interposed lenses between each lens. Furthermore, there is no relative movement between any adjacent lenses in the imaging optical lens group.

[0249] The first lens E1 has positive refractive power and is made of plastic material. The object-side surface of the first lens E1 is convex near the optical axis, and the image-side surface of the first lens E1 is concave near the optical axis. Both surfaces of the first lens E1 are aspherical surfaces. The object-side surface of the first lens E1 has one inflection point, and the image-side surface of the first lens E1 has one inflection point. The image-side surface of the first lens E1 has one critical point away from the optical axis.

[0250] The second lens E2 has positive refractive power and is made of plastic material. The object-side surface of the second lens E2 is convex near the optical axis, and the image-side surface of the second lens E2 is convex near the optical axis. Both surfaces of the second lens E2 are aspherical surfaces. The object-side surface of the second lens E2 has one inflection point.

[0251] The third lens E3 has negative refractive power and is made of plastic material. The object-side surface of the third lens E3 is convex near the optical axis, and the image-side surface of the third lens E3 is concave near the optical axis. Both surfaces of the third lens E3 are aspherical surfaces. The object-side surface of the third lens E3 has two inflection points, and the object-side surface of the third lens E3 has two critical points away from the optical axis.

[0252] The fourth lens E4 has negative refractive power and is made of plastic material. The object-side surface of the fourth lens E4 is concave near the optical axis, and the image-side surface of the fourth lens E4 is concave near the optical axis. Both surfaces of the fourth lens E4 are aspherical surfaces. The image-side surface of the fourth lens E4 has two inflection points, and the image-side surface of the fourth lens E4 has one critical point away from the optical axis.

[0253] The fifth lens E5 has positive refractive power and is made of plastic material. The object-side surface of the fifth lens E5 is convex near the optical axis, and the image-side surface of the fifth lens E5 is concave near the optical axis. Both surfaces of the fifth lens E5 are aspherical surfaces. The object-side surface of the fifth lens E5 has two inflection points, the image-side surface of the fifth lens E5 has two inflection points, the object-side surface of the fifth lens E5 has one critical point away from the optical axis, and the image-side surface of the fifth lens E5 has one critical point away from the optical axis.

[0254] The sixth lens E6 has positive refractive power and is made of plastic material. The object-side surface of the sixth lens E6 is concave near the optical axis, and the image-side surface of the sixth lens E6 is convex near the optical axis. Both surfaces of the sixth lens E6 are aspherical surfaces. The object-side surface of the sixth lens E6 has one inflection point, and the image-side surface of the sixth lens E6 has one inflection point.

[0255] The filter element E7 is made of glass and is disposed between the sixth lens E6 and the imaging surface IMG, and does not affect the focal length of the imaging optical lens.

[0256] In the present embodiment, the interval distance between the third lens E3 and the fourth lens E4 on the optical axis is the largest among the interval distances between adjacent lenses on the optical axis in the imaging optical lens.

[0257] The Abbe number of each of at least three lenses in the imaging optical lens is greater than 5.0 and less than 27.0. In detail, in the present embodiment, the Abbe number of the third lens E3, the Abbe number of the fifth lens E5, and the Abbe number of the sixth lens E6 are all greater than 5.0 and less than 27.0.

[0258] Please refer to Table 4A and Table 4B below.

[0259]

[0260]

[0261]

[0262]

[0263] In the fourth embodiment, the aspherical surface curve equation is in the form of the first embodiment. In addition, the definitions described in Table 4C below are the same as those of the first embodiment, and are not described again here.

[0264]

[0265] Fifth Embodiment

[0266] Please refer to Figures 9 to 10 wherein Figure 9 Fig. 5 shows a schematic diagram of an image pickup device according to the fifth embodiment of the present disclosure, Figure 10 Fig. 5 shows a schematic diagram of an image pickup device according to the fifth embodiment of the present disclosure, Figure 9 It can be seen that the image pickup device 5 comprises an imaging optical lens assembly (not labeled separately) and an electronic photosensitive element IS. The imaging optical lens assembly comprises, in order from the object side to the image side along the optical path, an aperture stop ST, a first lens E1, a second lens E2, a third lens E3, a diaphragm S1, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter element E7, and an imaging surface IMG. The electronic photosensitive element IS is arranged on the imaging surface IMG. The imaging optical lens assembly comprises six lenses (E1, E2, E3, E4, E5, E6), and there are no other lenses interposed between the lenses. In addition, all adjacent lenses in the imaging optical lens assembly do not move relative to each other.

[0267] The first lens E1 has positive refractive power and is made of plastic. The object side surface thereof is convex at the vicinity of the optical axis, and the image side surface thereof is concave at the vicinity of the optical axis. Both surfaces thereof are aspherical surfaces. The object side surface thereof has one inflection point, and the image side surface thereof has five inflection points.

[0268] The second lens E2 has positive refractive power and is made of plastic. The object side surface thereof is convex at the vicinity of the optical axis, and the image side surface thereof is convex at the vicinity of the optical axis. Both surfaces thereof are aspherical surfaces. The object side surface thereof has one inflection point, and the image side surface thereof has three inflection points.

[0269] The third lens E3 has negative refractive power and is made of plastic material. The object-side surface thereof is concave near the optical axis, and the image-side surface thereof is concave near the optical axis. Both surfaces thereof are aspherical surfaces. The object-side surface thereof has one inflection point, and the object-side surface thereof has one critical point away from the optical axis.

[0270] The fourth lens E4 has negative refractive power and is made of plastic material. The object-side surface thereof is convex near the optical axis, and the image-side surface thereof is concave near the optical axis. Both surfaces thereof are aspherical surfaces. The object-side surface thereof has one inflection point, the image-side surface thereof has two inflection points, the object-side surface thereof has one critical point away from the optical axis, and the image-side surface thereof has one critical point away from the optical axis.

[0271] The fifth lens E5 has positive refractive power and is made of plastic material. The object-side surface thereof is convex near the optical axis, and the image-side surface thereof is convex near the optical axis. Both surfaces thereof are aspherical surfaces. The object-side surface thereof has two inflection points, the image-side surface thereof has one inflection point, and the object-side surface thereof has one critical point away from the optical axis.

[0272] The sixth lens E6 has negative refractive power and is made of plastic material. The object-side surface thereof is concave near the optical axis, and the image-side surface thereof is convex near the optical axis. Both surfaces thereof are aspherical surfaces, and the object-side surface thereof has three inflection points.

[0273] The filter element E7 is made of glass and is disposed between the sixth lens E6 and the imaging surface IMG, and does not affect the focal length of the imaging optical lens.

[0274] In the present embodiment, the interval distance between the third lens E3 and the fourth lens E4 on the optical axis is the largest among the interval distances between adjacent lenses on the optical axis in the imaging optical lens.

[0275] The Abbe number of each of the at least three lenses in the imaging optical lens is greater than 5.0 and less than 27.0. In detail, in the present embodiment, the Abbe number of the third lens E3, the Abbe number of the fourth lens E4, the Abbe number of the fifth lens E5, and the Abbe number of the sixth lens E6 are all greater than 5.0 and less than 27.0.

[0276] Please refer to Table 5A and Table 5B below.

[0277]

[0278]

[0279]

[0280]

[0281] In the fifth embodiment, the equation for the aspherical curve is expressed as in the first embodiment. Furthermore, the definitions described in Table 5C below are the same as in the first embodiment and will not be repeated here.

[0282]

[0283] <Sixth Embodiment>

[0284] 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 As can be seen, the image capturing device 6 includes an imaging optical lens group (unlabeled) and an electronic photosensitive element IS. The imaging optical lens group, arranged sequentially from the object side to the image side along the optical path, includes an aperture ST, a first lens E1, a second lens E2, a third lens E3, an aperture stop S1, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter element E7, and an imaging surface IMG. The electronic photosensitive element IS is disposed on the imaging surface IMG. The imaging optical lens group contains six lenses (E1, E2, E3, E4, E5, E6), and there are no other interposed lenses between each lens. Furthermore, there is no relative movement between any adjacent lenses in the imaging optical lens group.

[0285] The first lens E1 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 four inflection points, and its image-side surface has two critical points off-axis.

[0286] The second lens E2 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, and its image-side surface also has a point of inflection.

[0287] The third lens E3 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, and its object-side surface has two inflection points.

[0288] The fourth lens E4 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 two inflection points. Its object-side surface has a critical point off-axis, and its image-side surface has a critical point off-axis.

[0289] The fifth lens E5 has positive refractive power and is made of plastic material. The object-side surface thereof is convex at the vicinity of the optical axis, and the image-side surface thereof is concave at the vicinity of the optical axis. Both surfaces thereof are aspherical surfaces. The object-side surface thereof has two inflection points, and the image-side surface thereof has two inflection points. The object-side surface thereof has one critical point at the off-axis position, and the image-side surface thereof has one critical point at the off-axis position.

[0290] The sixth lens E6 has positive refractive power and is made of plastic material. The object-side surface thereof is convex at the vicinity of the optical axis, and the image-side surface thereof is concave at the vicinity of the optical axis. Both surfaces thereof are aspherical surfaces. The object-side surface thereof has three inflection points, and the image-side surface thereof has one inflection point. The object-side surface thereof has one critical point at the off-axis position, and the image-side surface thereof has one critical point at the off-axis position.

[0291] The filter element E7 is made of glass and is disposed between the sixth lens E6 and the imaging plane IMG, and does not affect the focal length of the imaging optical lens.

[0292] In the present embodiment, the interval distance between the third lens E3 and the fourth lens E4 on the optical axis is the largest among the interval distances between the adjacent lenses on the optical axis in the imaging optical lens.

[0293] The Abbe number of each of the at least three lenses in the imaging optical lens is greater than 5.0 and less than 27.0. In detail, in the present embodiment, the Abbe number of the third lens E3, the Abbe number of the fifth lens E5, and the Abbe number of the sixth lens E6 are all greater than 5.0 and less than 27.0.

[0294] Please refer to Table 6A and Table 6B below.

[0295]

[0296]

[0297]

[0298]

[0299] In the sixth embodiment, the aspherical surface is expressed in the form of the first embodiment. In addition, the definitions described in Table 6C below are the same as those in the first embodiment, and are not described herein.

[0300]

[0301]

[0302] <Seventh Embodiment>

[0303] Please refer to Figures 13 to 14 wherein Figure 13FIG. 7 shows a schematic diagram of an image capturing device according to a seventh embodiment of the present disclosure, Figure 14 The ball aberration, the coma, and the distortion curves of the seventh embodiment are shown in sequence from left to right. Figure 13 As shown in FIG. 7, the image capturing device 7 includes an imaging optical lens assembly (not labeled separately) and an electronic image sensor IS. The imaging optical lens assembly includes, in sequence from the object side to the image side along the optical path, a stop ST, a first lens E1, a second lens E2, a third lens E3, a diaphragm S1, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter element E7, and an imaging surface IMG. The electronic image sensor IS is disposed on the imaging surface IMG. The imaging optical lens assembly includes six lenses (E1, E2, E3, E4, E5, E6) and no other lenses are interposed between the lenses. In addition, all the adjacent lenses in the imaging optical lens assembly do not move relative to each other.

[0304] The first lens E1 has positive refractive power and is made of plastic. The object side surface of the first lens E1 is convex at the vicinity of the optical axis, and the image side surface of the first lens E1 is convex at the vicinity of the optical axis. Both the object side surface and the image side surface of the first lens E1 are aspheric surfaces. The image side surface of the first lens E1 has three inflection points, and the image side surface of the first lens E1 has one critical point at the off-axis position.

[0305] The second lens E2 has positive refractive power and is made of plastic. The object side surface of the second lens E2 is convex at the vicinity of the optical axis, and the image side surface of the second lens E2 is concave at the vicinity of the optical axis. Both the object side surface and the image side surface of the second lens E2 are aspheric surfaces. The image side surface of the second lens E2 has two inflection points, and the image side surface of the second lens E2 has two critical points at the off-axis position.

[0306] The third lens E3 has negative refractive power and is made of plastic. The object side surface of the third lens E3 is convex at the vicinity of the optical axis, and the image side surface of the third lens E3 is concave at the vicinity of the optical axis. Both the object side surface and the image side surface of the third lens E3 are aspheric surfaces. The object side surface of the third lens E3 has two inflection points, and the object side surface of the third lens E3 has two critical points at the off-axis position.

[0307] The fourth lens E4 has negative refractive power and is made of plastic. The object side surface of the fourth lens E4 is convex at the vicinity of the optical axis, and the image side surface of the fourth lens E4 is concave at the vicinity of the optical axis. Both the object side surface and the image side surface of the fourth lens E4 are aspheric surfaces. The object side surface of the fourth lens E4 has one inflection point, the image side surface of the fourth lens E4 has two inflection points, the object side surface of the fourth lens E4 has one critical point at the off-axis position, and the image side surface of the fourth lens E4 has one critical point at the off-axis position.

[0308] The fifth lens E5 has positive refractive power and is made of plastic. The object side surface of the fifth lens E5 is convex at the vicinity of the optical axis, and the image side surface of the fifth lens E5 is concave at the vicinity of the optical axis. Both the object side surface and the image side surface of the fifth lens E5 are aspheric surfaces. The object side surface of the fifth lens E5 has two inflection points, the image side surface of the fifth lens E5 has two inflection points, the object side surface of the fifth lens E5 has one critical point at the off-axis position, and the image side surface of the fifth lens E5 has one critical point at the off-axis position.

[0309] The sixth lens E6 has positive refractive power and is made of plastic material. Its object-side surface is convex at the vicinity of the optical axis, and its image-side surface is concave at the vicinity of the optical axis. Both surfaces are aspherical. The object-side surface has three inflection points, and the image-side surface has one inflection point. The object-side surface has one critical point at the off-axis position, and the image-side surface has one critical point at the off-axis position.

[0310] The filter element E7 is made of glass and is disposed between the sixth lens E6 and the imaging plane IMG, and does not affect the focal length of the imaging optical lens.

[0311] In the present embodiment, the interval distance between the third lens E3 and the fourth lens E4 on the optical axis is the largest among the interval distances between the adjacent lenses on the optical axis in the imaging optical lens.

[0312] The Abbe number of each of the at least three lenses in the imaging optical lens is greater than 5.0 and less than 27.0. In detail, in the present embodiment, the Abbe number of the third lens E3, the Abbe number of the fifth lens E5, and the Abbe number of the sixth lens E6 are all greater than 5.0 and less than 27.0.

[0313] Please refer to Table 7A and Table 7B below.

[0314]

[0315]

[0316]

[0317]

[0318] In the seventh embodiment, the aspherical surface is represented by the same form as that in the first embodiment. In addition, the definitions described in Table 7C below are the same as those in the first embodiment, and are not described herein.

[0319]

[0320] <Eighth Embodiment>

[0321] Please refer to Figures 15 to 16 wherein Figure 15 A schematic diagram of an image capturing device according to the eighth embodiment of the present disclosure is shown in Figure 16 The left-to-right sequence is the spherical aberration, the astigmatism, and the distortion curves of the eighth embodiment. From the curves, it can be seen that the spherical aberration, the astigmatism, and the distortion of the eighth embodiment are all smaller than those of the first embodiment. Figure 15It is known that the image capturing device 8 comprises an imaging optical lens set (not labeled separately) and an electronic photosensitive element IS. The imaging optical lens set comprises, in order from the object side to the image side along the optical path, an aperture stop ST, a first lens E1, a second lens E2, a third lens E3, a diaphragm S1, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter element E7, and an imaging surface IMG. The electronic photosensitive element IS is arranged on the imaging surface IMG. The imaging optical lens set comprises six lenses (E1, E2, E3, E4, E5, E6), and there is no other lens interposed between each lens. In addition, all adjacent lenses in the imaging optical lens set do not move relative to each other.

[0322] The first lens E1 has positive refractive power and is made of plastic material. The object side surface thereof is convex at the vicinity of the optical axis, and the image side surface thereof is concave at the vicinity of the optical axis. Both surfaces thereof are aspherical surfaces. The object side surface thereof has one inflection point, and the image side surface thereof has one inflection point.

[0323] The second lens E2 has positive refractive power and is made of plastic material. The object side surface thereof is convex at the vicinity of the optical axis, and the image side surface thereof is convex at the vicinity of the optical axis. Both surfaces thereof are aspherical surfaces. The object side surface thereof has one inflection point, and the image side surface thereof has two inflection points.

[0324] The third lens E3 has negative refractive power and is made of plastic material. The object side surface thereof is convex at the vicinity of the optical axis, and the image side surface thereof is concave at the vicinity of the optical axis. Both surfaces thereof are aspherical surfaces. The object side surface thereof has two inflection points, the image side surface thereof has one inflection point, and the object side surface thereof has one critical point at the off-axis position.

[0325] The fourth lens E4 has negative refractive power and is made of plastic material. The object side surface thereof is convex at the vicinity of the optical axis, and the image side surface thereof is concave at the vicinity of the optical axis. Both surfaces thereof are aspherical surfaces. The object side surface thereof has one inflection point, the image side surface thereof has two inflection points, the object side surface thereof has one critical point at the off-axis position, and the image side surface thereof has one critical point at the off-axis position.

[0326] The fifth lens E5 has positive refractive power and is made of plastic material. The object side surface thereof is convex at the vicinity of the optical axis, and the image side surface thereof is concave at the vicinity of the optical axis. Both surfaces thereof are aspherical surfaces. The object side surface thereof has two inflection points, the image side surface thereof has two inflection points, the object side surface thereof has one critical point at the off-axis position, and the image side surface thereof has one critical point at the off-axis position.

[0327] The sixth lens E6 has positive refractive power and is made of plastic material. The object side surface thereof is convex at the vicinity of the optical axis, and the image side surface thereof is concave at the vicinity of the optical axis. Both surfaces thereof are aspherical surfaces. The object side surface thereof has two inflection points, the image side surface thereof has one inflection point, the object side surface thereof has two critical points at the off-axis position, and the image side surface thereof has one critical point at the off-axis position.

[0328] The filter element E7 is made of glass and is located between the sixth lens E6 and the imaging plane IMG. It does not affect the focal length of the imaging optical lens group.

[0329] In this embodiment, the distance between the third lens E3 and the fourth lens E4 on the optical axis is the largest among the distances between all adjacent lenses on the optical axis in the imaging optical lens group.

[0330] Please refer to Table 8A and Table 8B below.

[0331]

[0332]

[0333]

[0334]

[0335] In the eighth embodiment, the equation for the aspherical curve is expressed as in the first embodiment. Furthermore, the definitions in Table 8C below are the same as in the first embodiment and will not be repeated here.

[0336]

[0337] <Ninth Embodiment>

[0338] 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 17 As can be seen, the image capturing device 9 includes an imaging optical lens group (unlabeled) and an electronic photosensitive element IS. The imaging optical lens group, arranged sequentially from the object side to the image side along the optical path, includes an aperture ST, a first lens E1, a second lens E2, a third lens E3, an aperture stop S1, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter element E7, and an imaging surface IMG. The electronic photosensitive element IS is disposed on the imaging surface IMG. The imaging optical lens group contains six lenses (E1, E2, E3, E4, E5, E6), and there are no other interposed lenses between each lens. Furthermore, there is no relative movement between any adjacent lenses in the imaging optical lens group.

[0339] The first lens E1 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, and its image-side surface also has a point of inflection.

[0340] The second lens E2 has positive refractive power and is made of plastic material. The object-side surface thereof is convex at the vicinity of the optical axis, and the image-side surface thereof is convex at the vicinity of the optical axis. Both surfaces thereof are aspherical surfaces. The object-side surface thereof has one inflection point, and the image-side surface thereof has one inflection point.

[0341] The third lens E3 has negative refractive power and is made of plastic material. The object-side surface thereof is convex at the vicinity of the optical axis, and the image-side surface thereof is concave at the vicinity of the optical axis. Both surfaces thereof are aspherical surfaces. The object-side surface thereof has two inflection points, the image-side surface thereof has one inflection point, and the object-side surface thereof has two critical points at the off-axis.

[0342] The fourth lens E4 has negative refractive power and is made of plastic material. The object-side surface thereof is convex at the vicinity of the optical axis, and the image-side surface thereof is concave at the vicinity of the optical axis. Both surfaces thereof are aspherical surfaces. The object-side surface thereof has one inflection point, the image-side surface thereof has two inflection points, the object-side surface thereof has one critical point at the off-axis, and the image-side surface thereof has one critical point at the off-axis.

[0343] The fifth lens E5 has positive refractive power and is made of plastic material. The object-side surface thereof is convex at the vicinity of the optical axis, and the image-side surface thereof is concave at the vicinity of the optical axis. Both surfaces thereof are aspherical surfaces. The object-side surface thereof has two inflection points, the image-side surface thereof has two inflection points, the object-side surface thereof has one critical point at the off-axis, and the image-side surface thereof has one critical point at the off-axis.

[0344] The sixth lens E6 has positive refractive power and is made of plastic material. The object-side surface thereof is convex at the vicinity of the optical axis, and the image-side surface thereof is concave at the vicinity of the optical axis. Both surfaces thereof are aspherical surfaces. The object-side surface thereof has two inflection points, the image-side surface thereof has one inflection point, the object-side surface thereof has two critical points at the off-axis, and the image-side surface thereof has one critical point at the off-axis.

[0345] The filter element E7 is made of glass and is disposed between the sixth lens E6 and the imaging surface IMG, and does not affect the focal length of the imaging optical lens.

[0346] In the present embodiment, the interval distance between the third lens E3 and the fourth lens E4 on the optical axis is the largest among the interval distances between the adjacent lenses on the optical axis in the imaging optical lens.

[0347] The Abbe number of each of the at least three lenses in the imaging optical lens is greater than 5.0 and less than 27.0. In detail, in the present embodiment, the Abbe number of the third lens E3, the Abbe number of the fifth lens E5, and the Abbe number of the sixth lens E6 are all greater than 5.0 and less than 27.0.

[0348] Please refer to Table 9A and Table 9B below.

[0349]

[0350]

[0351]

[0352]

[0353] In the ninth embodiment, the aspherical surface is expressed in the form as in the first embodiment. In addition, the definitions described in Table 9C below are the same as those in the first embodiment, and are not described herein.

[0354]

[0355]

[0356] <The tenth embodiment>

[0357] Please refer to Figures 19 to 20 wherein Figure 19 a schematic diagram of an image capturing device according to the tenth embodiment of the present disclosure is shown, Figure 20 The left to right in order are the tenth embodiment of the spherical aberration, astigmatism and distortion curve. From Figure 19 It can be seen that the image capturing device 10 comprises an imaging optical lens set (not labeled separately) and an electronic photosensitive element IS. The imaging optical lens set comprises, in order from the object side to the image side along the optical path, an aperture ST, a first lens E1, a second lens E2, a third lens E3, a diaphragm S1, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter element E7 and an imaging surface IMG. Among them, the electronic photosensitive element IS is arranged on the imaging surface IMG. The imaging optical lens set comprises six lenses (E1, E2, E3, E4, E5, E6), and there is no other lens inserted between each lens. In addition, all adjacent lenses in the imaging optical lens set do not move relative to each other.

[0358] The first lens E1 has positive refractive power and is made of plastic material, the object side surface thereof is convex at the near optical axis, the image side surface thereof is concave at the near optical axis, and both surfaces thereof are aspherical surfaces.

[0359] The second lens E2 has positive refractive power and is made of plastic material, the object side surface thereof is convex at the near optical axis, the image side surface thereof is convex at the near optical axis, both surfaces thereof are aspherical surfaces, and the image side surface thereof has two inflection points.

[0360] The third lens E3 has negative refractive power and is made of plastic material, the object side surface thereof is convex at the near optical axis, the image side surface thereof is concave at the near optical axis, both surfaces thereof are aspherical surfaces, and the object side surface thereof has two inflection points.

[0361] The fourth lens E4 has negative refractive power and is made of plastic material. The object-side surface thereof is convex at the vicinity of the optical axis, and the image-side surface thereof is concave at the vicinity of the optical axis. Both surfaces thereof are aspherical surfaces. The object-side surface thereof has one inflection point, and the image-side surface thereof has two inflection points. The object-side surface thereof has one critical point at the off-axis region, and the image-side surface thereof has one critical point at the off-axis region.

[0362] The fifth lens E5 has negative refractive power and is made of plastic material. The object-side surface thereof is convex at the vicinity of the optical axis, and the image-side surface thereof is concave at the vicinity of the optical axis. Both surfaces thereof are aspherical surfaces. The object-side surface thereof has two inflection points, and the image-side surface thereof has two inflection points. The object-side surface thereof has one critical point at the off-axis region, and the image-side surface thereof has one critical point at the off-axis region.

[0363] The sixth lens E6 has positive refractive power and is made of plastic material. The object-side surface thereof is convex at the vicinity of the optical axis, and the image-side surface thereof is concave at the vicinity of the optical axis. Both surfaces thereof are aspherical surfaces. The object-side surface thereof has two inflection points, and the image-side surface thereof has one inflection point. The object-side surface thereof has one critical point at the off-axis region, and the image-side surface thereof has one critical point at the off-axis region.

[0364] The filter element E7 is made of glass and is disposed between the sixth lens E6 and the image plane IMG, and does not affect the focal length of the imaging optical lens.

[0365] In the present embodiment, the interval distance between the third lens E3 and the fourth lens E4 on the optical axis is the largest among the interval distances between the adjacent lenses on the optical axis in the imaging optical lens.

[0366] The Abbe number of each of the at least three lenses in the imaging optical lens is greater than 5.0 and less than 27.0. In the present embodiment, the Abbe number of the third lens E3, the Abbe number of the fifth lens E5, and the Abbe number of the sixth lens E6 are all greater than 5.0 and less than 27.0.

[0367] Please refer to Table 10A and Table 10B below.

[0368]

[0369]

[0370]

[0371]

[0372] In the tenth embodiment, the aspherical surface is represented by the same form as that in the first embodiment. In addition, the definitions described in Table 10C below are the same as those in the first embodiment, and are not described herein.

[0373]

[0374] <Eleventh Embodiment>

[0375] 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 As can be seen, the image capturing device 11 includes an imaging optical lens group (unlabeled) and an electronic photosensitive element IS. The imaging optical lens group, arranged sequentially from the object side to the image side along the optical path, includes an aperture ST, a first lens E1, a second lens E2, a third lens E3, an aperture stop S1, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter element E7, and an imaging surface IMG. The electronic photosensitive element IS is disposed on the imaging surface IMG. The imaging optical lens group comprises six lenses (E1, E2, E3, E4, E5, E6), and there are no other interposed lenses between each lens. Furthermore, there is no relative movement between any adjacent lenses in the imaging optical lens group.

[0376] The first lens E1 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 one inflection point, its image-side surface has three inflection points, and its image-side surface has three critical points off-axis.

[0377] The second lens E2 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 a point of inflection.

[0378] The third lens E3 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 two inflection points, and its object-side surface has two critical points off-axis.

[0379] The fourth lens E4 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 two inflection points. Its object-side surface has a critical point off-axis, and its image-side surface has a critical point off-axis.

[0380] The fifth lens E5 has positive refractive power and is made of plastic material. The object-side surface thereof is convex at the vicinity of the optical axis, and the image-side surface thereof is concave at the vicinity of the optical axis. Both surfaces thereof are aspherical surfaces. The object-side surface thereof has two inflection points, and the image-side surface thereof has two inflection points. The object-side surface thereof has one critical point at the off-axis position, and the image-side surface thereof has one critical point at the off-axis position.

[0381] The sixth lens E6 has positive refractive power and is made of plastic material. The object-side surface thereof is convex at the vicinity of the optical axis, and the image-side surface thereof is concave at the vicinity of the optical axis. Both surfaces thereof are aspherical surfaces. The object-side surface thereof has two inflection points, and the image-side surface thereof has one inflection point. The object-side surface thereof has one critical point at the off-axis position, and the image-side surface thereof has one critical point at the off-axis position.

[0382] The filter element E7 is made of glass and is disposed between the sixth lens E6 and the imaging plane IMG, and does not affect the focal length of the imaging optical lens.

[0383] In the present embodiment, the interval distance between the third lens E3 and the fourth lens E4 on the optical axis is the largest among the interval distances between the adjacent lenses on the optical axis in the imaging optical lens.

[0384] The Abbe number of each of the at least three lenses in the imaging optical lens is greater than 5.0 and less than 27.0. In detail, in the present embodiment, the Abbe number of the third lens E3, the Abbe number of the fifth lens E5, and the Abbe number of the sixth lens E6 are all greater than 5.0 and less than 27.0.

[0385] Please refer to Table 11A and Table 11B below.

[0386]

[0387]

[0388]

[0389] In the eleventh embodiment, the aspherical surface is represented in the form of the first embodiment. In addition, the definitions described in Table 11C below are the same as those in the first embodiment, and are not described herein.

[0390] The definitions described in Table 11C are the same as those in the first embodiment, and are not described herein.

[0391]

[0392]

[0393] <Twelfth Embodiment>

[0394] Please refer to Figures 23 to 24 wherein Figure 23FIG. 12 shows a schematic diagram of an image capturing device according to a twelfth embodiment of the present disclosure, Figure 24 The ball aberration, the coma, and the distortion curves of the twelfth embodiment are sequentially shown from left to right. Figure 23 As shown in FIG. 12, the image capturing device 12 includes an imaging optical lens assembly (not labeled separately) and an electronic image sensor IS. The imaging optical lens assembly sequentially includes, along an optical path from an object side to an image side, a first lens E1, a stop ST, a second lens E2, a third lens E3, a diaphragm S1, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter element E7, and an image surface IMG. The electronic image sensor IS is disposed on the image surface IMG. The imaging optical lens assembly includes six lenses (E1, E2, E3, E4, E5, E6) and no other lenses are interposed between the lenses. In addition, all the adjacent lenses in the imaging optical lens assembly do not relatively move with respect to each other.

[0395] The first lens E1 has positive refractive power and is made of glass. The object side surface of the first lens E1 is convex at the vicinity of the optical axis, and the image side surface of the first lens E1 is concave at the vicinity of the optical axis. Both the object side surface and the image side surface of the first lens E1 are aspheric surfaces. The object side surface of the first lens E1 has one inflection point, and the image side surface of the first lens E1 has one inflection point.

[0396] The second lens E2 has positive refractive power and is made of plastic. The object side surface of the second lens E2 is convex at the vicinity of the optical axis, and the image side surface of the second lens E2 is concave at the vicinity of the optical axis. Both the object side surface and the image side surface of the second lens E2 are aspheric surfaces. The image side surface of the second lens E2 has two inflection points.

[0397] The third lens E3 has negative refractive power and is made of plastic. The object side surface of the third lens E3 is convex at the vicinity of the optical axis, and the image side surface of the third lens E3 is concave at the vicinity of the optical axis. Both the object side surface and the image side surface of the third lens E3 are aspheric surfaces.

[0398] The fourth lens E4 has negative refractive power and is made of plastic. The object side surface of the fourth lens E4 is convex at the vicinity of the optical axis, and the image side surface of the fourth lens E4 is concave at the vicinity of the optical axis. Both the object side surface and the image side surface of the fourth lens E4 are aspheric surfaces. The object side surface of the fourth lens E4 has one inflection point, the image side surface of the fourth lens E4 has one inflection point, the object side surface of the fourth lens E4 has one critical point at an off-axis position, and the image side surface of the fourth lens E4 has one critical point at an off-axis position.

[0399] The fifth lens E5 has positive refractive power and is made of plastic. The object side surface of the fifth lens E5 is convex at the vicinity of the optical axis, and the image side surface of the fifth lens E5 is concave at the vicinity of the optical axis. Both the object side surface and the image side surface of the fifth lens E5 are aspheric surfaces. The object side surface of the fifth lens E5 has one inflection point, the image side surface of the fifth lens E5 has two inflection points, the object side surface of the fifth lens E5 has one critical point at an off-axis position, and the image side surface of the fifth lens E5 has one critical point at an off-axis position.

[0400] The sixth lens E6 has positive refractive power and is made of plastic. The object side surface of the sixth lens E6 is concave at the vicinity of the optical axis, and the image side surface of the sixth lens E6 is convex at the vicinity of the optical axis. Both the object side surface and the image side surface of the sixth lens E6 are aspheric surfaces. The object side surface of the sixth lens E6 has one inflection point.

[0401] The filter element E7 is made of glass, which is disposed between the sixth lens E6 and the imaging plane IMG, and does not affect the focal length of the imaging optical lens.

[0402] In the present embodiment, the interval distance of the third lens E3 and the fourth lens E4 on the optical axis is the largest among the interval distances of all adjacent lenses on the optical axis in the imaging optical lens.

[0403] The Abbe number of each of the at least three lenses in the imaging optical lens is greater than 5.0 and less than 27.0. In detail, in the present embodiment, the Abbe number of the third lens E3, the Abbe number of the fifth lens E5, and the Abbe number of the sixth lens E6 are all greater than 5.0 and less than 27.0.

[0404] Please refer to Table 12A and Table 12B below.

[0405]

[0406]

[0407]

[0408]

[0409] In the twelfth embodiment, the curve equation of the aspheric surface is represented in the form of the first embodiment. In addition, the definitions described in Table 12C are the same as those in the first embodiment, and are not described herein.

[0410] The definitions described in Table 12C are the same as those in the first embodiment, and are not described herein.

[0411]

[0412] <Thirteenth Embodiment>

[0413] Please refer to Figure 25 is a perspective view illustrating an image capturing device according to the thirteenth embodiment of the present disclosure. In the present 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 labeled separately) for carrying the imaging optical lens, and a holder member (not labeled separately), and the imaging lens 101 can also be configured with the imaging optical lens of other embodiments described above, without being limited to the present disclosure. The image capturing device 100 generates an image by condensing light with the imaging lens 101, and performs image focusing with the driving device 102, and finally images on the electronic photosensitive element 103 and can be output as image data.

[0414] The driving device 102 can have an auto-focus function, and the driving manner thereof can use a driving system such as a voice coil motor (VCM), a micro electro-mechanical system (MEMS), a piezoelectric system, and a shape memory alloy. The driving device 102 can allow the imaging lens 101 to obtain a better imaging position, and can provide a clear image in the state of an object at different object distances. In addition, the image capturing device 100 is provided with an electronic photosensitive element 103 (such as a CMOS or a CCD) with good photosensitivity and low noise at the imaging surface of the imaging optical lens group, and can truly present the good imaging quality of the imaging optical lens group.

[0415] The image stabilization module 104 is, for example, an accelerometer, a gyroscope, or a Hall effect sensor. The driving device 102 can be combined with the image stabilization module 104 to serve as an optical image stabilization (OIS) device, and can compensate for blurred images caused by shaking at the moment of shooting by adjusting the changes of the imaging lens 101 in different axial directions, or can provide an electronic image stabilization (EIS) function by using an image compensation technology in the image software, so as to further improve the imaging quality in dynamic and low-illumination scenes.

[0416] <Fourteenth Embodiment>

[0417] Please refer to Figures 26 to 28 , wherein Figure 26 a perspective view of one side of an electronic device according to the fourteenth embodiment of the present disclosure is shown, Figure 27 a perspective view of the other side of the electronic device of Figure 26 , and Figure 28 a system block diagram of the electronic device of Figure 26 .

[0418] In this embodiment, the electronic device 200 is a smartphone. The electronic device 200 comprises the image capturing device 100, the image capturing device 100a, the image capturing device 100b, the image capturing device 100c, the image capturing device 100d, the image capturing device 100e, a flash module 201, a focus assist module 202, an image signal processor 203, a display module 204, and an image software processor 205 of the thirteenth embodiment. The image capturing device 100, the image capturing device 100a, and the image capturing device 100b are all arranged on the same side of the electronic device 200 and are all single-focus. The focus assist module 202 can employ a laser ranging or a Time of Flight (ToF) module, but the present disclosure is not limited thereto. The image capturing device 100c, the image capturing device 100d, the image capturing device 100e, and the display module 204 are all arranged on the other side of the electronic device 200, and the display module 204 can be a user interface, such that the image capturing device 100c, the image capturing device 100d, and the image capturing device 100e can serve as front-facing lenses to provide a selfie function, but the present disclosure is not limited thereto. Moreover, the image capturing device 100a, the image capturing device 100b, the image capturing device 100c, the image capturing device 100d, and the image capturing device 100e can all comprise the imaging optical lens assembly of the present disclosure and can all have a similar structural arrangement as the image capturing device 100. In detail, the image capturing device 100a, the image capturing device 100b, the image capturing device 100c, the image capturing device 100d, and the image capturing device 100e can each comprise an imaging lens, a driving device, an electronic photosensitive element, and an image stabilization module, and can each comprise a light path folding element as a folding light path element. Among them, the imaging lens of the image capturing device 100a, the image capturing device 100b, the image capturing device 100c, the image capturing device 100d, and the image capturing device 100e can each comprise, for example, the imaging optical lens assembly of the present disclosure, a lens barrel for carrying the imaging optical lens assembly, and a support device.

[0419] The image capturing device 100 is a telephoto image capturing device with a folded light path, the image capturing device 100a is a wide-angle image capturing device, the image capturing device 100b is a super-wide-angle image capturing device, the image capturing device 100c is a wide-angle image capturing device, the image capturing device 100d is a super-wide-angle image capturing device, and the image capturing device 100e is a Time of Flight image capturing device. The image capturing device 100, the image capturing device 100a, and the image capturing device 100b of this embodiment have different angles of view, so that the electronic device 200 can provide different magnifications to achieve an optical zoom shooting effect. In addition, the image capturing device 100e can obtain depth information of an image. Among them, the folded light path arrangement of the image capturing device 100 can have a structure similar to Figures 34 to 36 Figures 34 to 36 ​The detailed descriptions of the above-mentioned embodiments are not repeated here. In addition, the image capturing devices 100a, 100b, 100c, 100d, 100e can also have a light path turning configuration, and can also have a structure similar to Figures 34 to 36 , for example, and the corresponding descriptions of the above-mentioned embodiments can be referred to. The electronic device 200 described above is taken as an example of containing multiple image capturing devices 100, 100a, 100b, 100c, 100d, 100e, but the number and configuration of the image capturing devices are not intended to limit the present disclosure. Figures 34 to 36

[0420] When the user captures the object 206, the electronic device 200 uses the image capturing device 100, the image capturing device 100a, or the image capturing device 100b to capture the light, starts the flash module 201 to provide supplementary light, uses the object distance information of the object 206 provided by the focus assisting module 202 to achieve fast focusing, and uses the image signal processor 203 to perform image optimization processing to further improve the image quality generated by the imaging optical lens. The focus assisting module 202 can use an infrared or laser focus assisting system to achieve fast focusing. In addition, the electronic device 200 can also use the image capturing device 100c, the image capturing device 100d, or the image capturing device 100e to capture the image. The display module 204 can use a touch screen to cooperate with the diversified functions of the image software processor 205 to capture and process the image (or can use a physical shooting button to capture the image). The image processed by the image software processor 205 can be displayed on the display module 204.

[0421] <15th Embodiment>

[0422] Please refer to Figure 29 and Figure 30 , wherein Figure 29 illustrates a schematic diagram of one side of an electronic device according to the 15th embodiment of the present disclosure, and Figure 30 illustrates a schematic diagram of the other side of the electronic device of Figure 29 .

[0423] In this embodiment, the electronic device 300 is a smart phone. The electronic device 300 contains the image capturing device 100, the image capturing device 100f, the image capturing device 100g, the image capturing device 100h, and the display module 301 of the 13th embodiment. As shown in Figure 29 , the image capturing device 100, the image capturing device 100f, and the image capturing device 100g are all arranged on the same side of the electronic device 300 and are all single-focus. As shown in Figure 30 ​As shown, the image capturing device 100h and the display module 301 are both disposed on the other side of the electronic device 300. The image capturing device 100h can serve as a front camera to provide a selfie function, but the present disclosure is not limited thereto. In addition, the image capturing device 100f, the image capturing device 100g and the image capturing device 100h can all include the imaging optical lens assembly of the present disclosure and can all have a similar structural configuration as the image capturing device 100. In detail, the image capturing device 100f, the image capturing device 100g and the image capturing device 100h can each include an imaging lens, a driving device, an electronic photosensitive element and an image stabilization module. Among them, the imaging lens of the image capturing device 100f, the image capturing device 100g and the image capturing device 100h can each include, for example, the imaging optical lens assembly of the present disclosure, a lens barrel for carrying the imaging optical lens assembly, and a support device.

[0424] The image capturing device 100 is a telephoto image capturing device, the image capturing device 100f is a wide-angle image capturing device, the image capturing device 100g is a super-wide-angle image capturing device, and the image capturing device 100h is a wide-angle image capturing device. The image capturing device 100, the image capturing device 100f and the image capturing device 100g of the present embodiment have different angles of view, so that the electronic device 300 can provide different magnifications to achieve the shooting effect of optical zoom. The above-mentioned electronic device 300 is taken as an example of including multiple image capturing devices 100, 100f, 100g and 100h, but the number and configuration of the image capturing devices are not intended to limit the present disclosure.

[0425] <Sixteenth Embodiment>

[0426] Please refer to Figure 31 is a perspective view illustrating one side of an electronic device according to the sixteenth embodiment of the present disclosure.

[0427] In this embodiment, the electronic device 400 is a smartphone. The electronic device 400 includes the image capturing device 100, the image capturing device 100i, the image capturing device 100j, the image capturing device 100k, the image capturing device 100m, the image capturing device 100n, the image capturing device 100p, the image capturing device 100q, the image capturing device 100r, a flash module 401, a focus assist module, an image signal processor, a display module, and an image software processor (not shown) of the thirteenth embodiment. The image capturing device 100, the image capturing device 100i, the image capturing device 100j, the image capturing device 100k, the image capturing device 100m, the image capturing device 100n, the image capturing device 100p, the image capturing device 100q, and the image capturing device 100r are all arranged on the same side of the electronic device 400, while the display module is arranged on the other side of the electronic device 400. Moreover, the image capturing device 100i, the image capturing device 100j, the image capturing device 100k, the image capturing device 100m, the image capturing device 100n, the image capturing device 100p, the image capturing device 100q, and the image capturing device 100r can all include the imaging optical lens assembly of the present disclosure and can all have a similar structural arrangement as the image capturing device 100, which will not be repeated here.

[0428] The image capturing device 100 is a telephoto image capturing device with a light path folding, the image capturing device 100i is a telephoto image capturing device with a light path folding, the image capturing device 100j is a wide-angle image capturing device, the image capturing device 100k is a wide-angle image capturing device, the image capturing device 100m is a super-wide-angle image capturing device, the image capturing device 100n is a super-wide-angle image capturing device, the image capturing device 100p is a telephoto image capturing device, the image capturing device 100q is a telephoto image capturing device, and the image capturing device 100r is a time-of-flight range finding image capturing device. The image capturing device 100, the image capturing device 100i, the image capturing device 100j, the image capturing device 100k, the image capturing device 100m, the image capturing device 100n, the image capturing device 100p, and the image capturing device 100q of this embodiment have different angles of view, so that the electronic device 400 can provide different magnifications to achieve an optical zoom shooting effect. In addition, the image capturing device 100r can obtain depth information of an image. The light path folding arrangement of the image capturing device 100 and 100i may, for example, have a similar structure as shown in FIG. 1A, which can be referred to the foregoing corresponding description. Figures 34 to 36 Figures 34 to 36 ​The above electronic device 400 is exemplified by including multiple image capturing devices 100, 100i, 100j, 100k, 100m, 100n, 100p, 100q, 100r, but the number and configuration of the image capturing devices are not intended to limit the present disclosure. When the user shoots the object, the electronic device 400 uses the image capturing device 100, the image capturing device 100i, the image capturing device 100j, the image capturing device 100k, the image capturing device 100m, the image capturing device 100n, the image capturing device 100p, the image capturing device 100q or the image capturing device 100r to focus and capture the image, starts the flash module 401 to provide light, and performs subsequent processing in a manner similar to the foregoing embodiments, which will not be repeated here.

[0429] The image capturing device of the present disclosure is not limited to be applied to a smart phone. The image capturing device can be applied to a mobile focusing system as needed, and has the features of good aberration correction and good imaging quality. For example, the image capturing device can be applied to various electronic devices such as a three-dimensional (3D) image capturing device, a digital camera, a mobile product, a tablet computer, a smart television, a network monitoring device, a driving recorder, a reversing device, a multi-lens device, an identification system, a motion game machine, a drone, a wearable product, and a portable image recorder. The foregoing electronic devices are only exemplary to illustrate the practical application examples of the present disclosure, and are not intended to limit the application range of the image capturing device of the present disclosure.

[0430] Although the present disclosure is disclosed with the foregoing preferred embodiments, it is not intended to limit the present disclosure, and any person skilled in the art can make some changes and modifications without departing from the spirit and scope of the present disclosure. Therefore, the patent protection scope of the present disclosure should be defined by the claims attached to the present specification.

Claims

1. An imaging optical lens assembly, characterized in that, The six lenses are sequentially arranged along an optical path from an object side to an image side as a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens, and each of the six lenses has an object side surface facing the object side direction and an image side surface facing the image side direction; The first lens has positive refractive power, the second lens has positive refractive power, the third lens has negative refractive power, the fourth lens has a concave image side surface at a vicinity of an optical axis, the fourth lens has at least one inflection point on the image side surface, the fifth lens has a convex object side surface at the vicinity of the optical axis, and all adjacent lenses in the imaging optical lens assembly do not move relative to each other; 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 distance from the image side surface of the sixth lens to an imaging plane on the optical axis is BL, the interval distance between the third lens and the fourth lens on the optical axis is T34, the focal length of the fourth lens is f4, and the focal length of the fifth lens is f5, which satisfy the following conditions: 0.10 < CT5 / CT6 < 2.00; 0.05 < BL / T34 < 1.25; and 0.05 < |f4 / f5| < 1.

45.

2. The imaging lens according to claim 1, wherein, The image side surface of the third lens is concave at the vicinity of the optical axis, and the fourth lens has negative refractive power; 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 first lens is R2, which satisfy the following condition: -10.00 < (R1+R2) / (R1-R2) < 1.

00.

3. The imaging lens according to claim 1, wherein, The object side surface of the first lens is convex at the vicinity of the optical axis; The maximum viewing angle of the imaging optical lens assembly is FOV, which satisfies the following condition: 25.0 degrees < FOV < 47.0 degrees.

4. The imaging lens according to claim 1, wherein, The image side surface of the second lens is convex at the vicinity of the optical axis, and the image side surface of the fifth lens is concave at the vicinity of the optical axis.

5. The imaging lens according to claim 1, wherein, The image side surface of the fourth lens has at least one critical point at an off-axis position; The Abbe number of the sixth lens is V6, which satisfies the following condition: 10.0<V6<26.0。 6. The imaging lens according to claim 1, wherein, The thickness of the first lens on the optical axis is CT1, the distance from the object side surface of the second lens to the imaging plane on the optical axis is Dr3I, the maximum imaging height of the imaging optical lens assembly is ImgH, the focal length of the imaging optical lens assembly is f, the focal length of the fifth lens is f5, and the focal length of the sixth lens is f6, which satisfy the following conditions: 2.00 < (CT1+Dr3I) / ImgH < 4.00; and 0.00 < f / f5+f / f6 < 4.

00.

7. The imaging lens according to claim 1, wherein, The radius of curvature of the object side surface of the second lens is R3, the radius of curvature of the image side surface of the second lens is R4, the focal length of the imaging optical lens assembly is f, and the entrance pupil diameter of the imaging optical lens assembly is EPD, which satisfy the following conditions: -10.00 < (R3+R4) / (R3-R4) < 0.40; and f / EPD < 2.

00.

8. The imaging lens according to claim 1, wherein, A thickness of the first lens on the optical axis is CT1, a thickness of the sixth lens on the optical axis is CT6, a separation distance of the third lens and the fourth lens on the optical axis is T34, and a separation distance of the fifth lens and the sixth lens on the optical axis is T56, which satisfy the following conditions: 0.30 < CT1 / CT6 < 2.50; and 0.10 ≤ T56 / T34 < 1.

00.

9. The imaging lens according to claim 1, wherein, A separation distance of the first lens and the second lens on the optical axis is T12, a separation distance of the second lens and the third lens on the optical axis is T23, a separation distance of the third lens and the fourth lens on the optical axis is T34, a separation distance of the fourth lens and the fifth lens on the optical axis is T45, a separation distance of the fifth lens and the sixth lens on the optical axis is T56, a focal length of the third lens is f3, and a focal length of the fourth lens is f4, which satisfy the following conditions: 1.00 < (T12+T34) / (T23+T45+T56) < 5.00; and 0.30 < |f3 / f4| < 1.

30.

10. An image capturing device, comprising: The imaging optical lens according to claim 1; and An electronic photosensitive element disposed on the imaging surface of the imaging optical lens. The image capturing device according to claim 10.

11. An electronic device, comprising: The six lenses are sequentially arranged along an optical path from an object side to an image side as a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens, and each of the six lenses has an object side surface facing the object side direction and an image side surface facing the image side direction; The second lens has positive refractive power, the object side surface of the second lens is convex at a vicinity of the optical axis, the third lens has negative refractive power, the image side surface of the fourth lens is concave at a vicinity of the optical axis, the image side surface of the fourth lens has at least one inflection point, and the object side surface of the fifth lens is convex at a vicinity of the optical axis; 12. An imaging optical lens assembly, characterized in that, A focal length of the imaging optical lens is f, a focal length of the first lens is f1, a focal length of the second lens is f2, a focal length of the fifth lens is f5, a focal length of the sixth lens is f6, a separation distance of the third lens and the fourth lens on the optical axis is T34, a separation distance of the fourth lens and the fifth lens on the optical axis is T45, a separation distance of the fifth lens and the sixth lens on the optical axis is T56, a radius of curvature of the object side surface of the first lens is R1, and a radius of curvature of the image side surface of the first lens is R2, which satisfy the following conditions: 0.20 < f / f5+f / f6 < 4.00; 0.05 < (T45+T56) / T34 < 1.00; -10.00 < (R1+R2) / (R1-R2) < 0.00; and 0.30 < |f1 / f2| < 1.

70. The fifth lens has positive refractive power, and the sixth lens has positive refractive power. ​ 13. The imaging optical lens according to claim 12, wherein, ​ 14. The imaging optical lens according to claim 12, wherein, The first lens has positive refractive power, the third lens image side surface is concave at the vicinity of the optical axis, and at least one of the fifth lens object side surface and the fifth lens image side surface has at least one inflection point.

15. The imaging optical lens according to claim 12, wherein, The thickness of the first lens on the optical axis is CT1, and the thickness of the second lens on the optical axis is CT2, which satisfy the following conditions: 0.40 < CT1 / CT2 < 3.

00.

16. The imaging lens according to claim 12, wherein, The focal length of the fourth lens is f4, the focal length of the fifth lens is f5, the distance from the sixth lens image side surface to an imaging surface on the optical axis is BL, and the interval distance between the third lens and the fourth lens on the optical axis is T34, which satisfy the following conditions: 0.05 < |f4 / f5| < 1.45; and 0.05 < BL / T34 < 1.

25.

17. The imaging lens according to claim 12, wherein, The distance from the sixth lens image side surface 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: 0.05 < BL / f < 0.

30.

18. The imaging lens according to claim 12, wherein, The distance from the first lens object side surface to the sixth lens image side surface on the optical axis is TD, and the maximum imaging height of the imaging optical lens is ImgH, which satisfy the following conditions: 1.90 < TD / ImgH < 3.

80.

19. The imaging lens according to claim 12, wherein, The sum of the thicknesses of all lenses in the imaging optical lens on the optical axis is ΣCT, and the distance from the first lens object side surface to the sixth lens image side surface on the optical axis is TD, which satisfy the following conditions: 0.50 < ΣCT / TD < 0.

75.

20. The imaging lens according to claim 12, wherein, The interval distance between the third lens and the fourth lens on the optical axis is the maximum among the interval distances between all adjacent lenses in the imaging optical lens on the optical axis.

21. An imaging optical lens assembly, characterized in that, The imaging optical lens comprises six lenses, which are sequentially arranged along an optical path from an object side to an image side as a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens, and each of the six lenses has an object side surface facing the object side direction and an image side surface facing the image side direction; The first lens has positive refractive power, the second lens has positive refractive power, the fourth lens image side surface is concave at the vicinity of the optical axis, and the fourth lens image side surface has at least one inflection point; The focal length of the imaging optical lens is f, the focal length of the second lens is f2, the focal length of the fourth lens is f4, the focal length of the fifth lens is f5, the focal length of the sixth lens is f6, the interval distance between the second lens and the third lens on the optical axis is T23, the interval distance between the third lens and the fourth lens on the optical axis is T34, the distance from the sixth lens image side surface to an imaging surface on the optical axis is BL, the distance from the fourth lens object side surface to the sixth lens image side surface on the optical axis is Dr7r12, the Abbe number of the third lens is V3, and the Abbe number of the fifth lens is V5, which satisfy the following conditions: 0.65 < f / f5 + f / f6 < 4.00; 0.02 < T23 / T34 < 1.10; 0.15 < BL / Dr7r12 < 0.75; 20.0 < V3 + V5 < 60.0; and 0.65 < f / f5 + f / f6 < 4.00; 0.05 < |f4 / f2| < 1.

25.

22. The imaging lens according to claim 21, wherein, The first lens image side surface is concave at the vicinity of the optical axis, the fifth lens object side surface is convex at the vicinity of the optical axis, at least one of the fifth lens object side surface and the fifth lens image side surface has at least one inflection point, and the sixth lens has positive refractive power.

23. The imaging lens according to claim 21, wherein, The distance from the first lens object side surface to the imaging surface on the optical axis is TL, the focal length of the imaging optical lens is f, the distance from the sixth lens image side surface to the imaging surface on the optical axis is BL, and the thickness of the second lens on the optical axis is CT2, which satisfy the following conditions: 0.80 < TL / f < 1.30; and 0.70 < BL / CT2 < 2.

00.

24. The imaging lens according to claim 21, wherein, The focal length of the third lens is f3, and the focal length of the fourth lens is f4, which satisfy the following conditions: 0.30 < |f3 / f4| < 1.

30.

25. The imaging lens according to claim 21, wherein, The distance from the sixth lens image side surface to the imaging surface on the optical axis is BL, and the thickness of the second lens on the optical axis is CT2, which satisfy the following conditions: 0.20 < BL / CT2 < 2.

00.

26. The imaging lens according to claim 21, wherein, The interval distance between the first lens and the second lens on the optical axis is T12, the interval distance between the fourth lens and the fifth lens on the optical axis is T45, and the interval distance between the fifth lens and the sixth lens on the optical axis is T56, which satisfy the following conditions: 0.40 < T56 / (T12+T45) < 5.

00.

27. The imaging lens according to claim 21, wherein, The Abbe number of each of at least three lenses in the imaging optical lens is greater than 5.0 and less than 27.

0.

28. The imaging lens according to claim 21, wherein, The maximum effective radius of the first lens object side surface is Y1R1, and the maximum effective radius of the fourth lens object side surface is Y4R1, which satisfy the following conditions: 1.00 < Y1R1 / Y4R1 < 5.

00.

29. The imaging lens according to claim 21, wherein, 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 distance from the sixth lens image side surface to the imaging surface on the optical axis is BL, the interval distance between the second lens and the third lens on the optical axis is T23, the interval distance between the third lens and the fourth lens on the optical axis is T34, the interval distance between the fourth lens and the fifth lens on the optical axis is T45, the interval distance between the fifth lens and the sixth lens on the optical axis is T56, the radius of curvature of the first lens object side surface is R1, the radius of curvature of the first lens image side surface is R2, the focal length of the imaging optical lens is f, the focal length of the first lens is f1, the focal length of the second lens is f2, the focal length of the fourth lens is f4, the focal length of the fifth lens is f5, the focal length of the sixth lens is f6, the distance from the fourth lens object side surface to the sixth lens image side surface on the optical axis is Dr7r12, the Abbe number of the third lens is V3, and the Abbe number of the fifth lens is V5, which satisfy the following conditions: 0.28 ≤ CT5 / CT6 ≤ 0.67; 0.58 ≤ BL / T34 ≤ 1.13; 0.40 < T56 / (T12+T45) < 5.

00. -1.77 < (R1+R2) / (R1-R2) < -0.92; 0.11 < |f4 / f5| < 0.88; 0.74 < f / f5 + f / f6 < 1.37; 0.21 < (T45+T56) / T34 < 0.70; 0.51 < |f1 / f2| < 0.97; 0.03 < T23 / T34 < 0.25; 0.33 < BL / Dr7r12 < 0.62; 36.4 < V3+V5 < 50.8; and 0.49 < |f4 / f2| < 0.92.

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