Imaging optical lens assembly, imaging device and electronic apparatus

Abstract

An imaging optical lens assembly comprising six lens elements (E1, E2, E3, E4, E5, E6), wherein the six lens elements (E1, E2, E3, E4, E5, E6) are in order from an object side to an image side along an optical path: a first lens element (E1), a second lens element (E2), a third lens element (E3), a fourth lens element (E4), a fifth lens element (E5), and a sixth lens element (E6); wherein each of the six lens elements (E1, E2, E3, E4, E5, E6) has an object-side surface toward the object side and an image-side surface toward the image side; wherein the object-side surface of the first lens element (E1) is convex in a paraxial region thereof; the second lens element (E2) has a positive refractive power; the image-side surface of the third lens element (E3) is concave in a paraxial region thereof; the object-side surface of the fourth lens element (E4) is convex in a paraxial region thereof, the image-side surface of the fourth lens element (E4) is concave in a paraxial region thereof; at least one of the second lens element (E2) to the sixth lens element (E6) comprises at least one bending point (IP) in an optically effective surface thereof; wherein an axial distance between the third lens element (E3) and the fourth lens element (E4) is T34, an axial distance between the fourth lens element (E4) and the fifth lens element (E5) is T45, an axial distance between the fifth lens element (E5) and the sixth lens element (E6) is T56, an axial distance between the object-side surface of the first lens element (E1) and the image-side surface of the second lens element (E2) of the imaging optical lens assembly is Dr1r4, a central thickness of the third lens element (E3) is CT3, a focal length of the imaging optical lens assembly is f, a radius of curvature of the image-side surface of the third lens element (E3) is R6, and the following conditions are met: 0.10 < (T 34 + T 45) / T 56 < 1.6; 6.5 > Dr 1 r 4 / CT 3 ; and 4.4 < f / R 6.

Description

STATE OF THE ARTTechnical field

[0001] The present disclosure relates to an imaging optical lens assembly and an imaging device. In particular, the present disclosure relates to an imaging optical lens assembly and an imaging device with a compact size that can be applied to electronic devices. Description of the related art

[0002] With recent advances in semiconductor process technology, the performance of image sensors is improving, allowing smaller pixel sizes to be achieved. Therefore, high-image-quality optical lens assemblies have become an indispensable part of many modern electronics. With the rapid development of technology, the applications of electronic devices using optical lens assemblies are increasing, and there are diverse requirements for optical lens assemblies. However, with a conventional optical lens assembly, it is difficult to strike a balance between image quality, sensitivity, aperture size, volume, or field of view. Therefore, there is a need for an imaging optical lens assembly that meets the above requirements. SUMMARY

[0003] According to one aspect of the present disclosure, an imaging optical lens assembly includes six lens elements, the six lens elements being, in order from an object side to an image side along an optical path, a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element, and a sixth lens element. Each of the six lens elements has an object-side surface toward the object side and an image-side surface toward the image side. Preferably, the object-side surface of the first lens element is convex in a paraxial region thereof. Preferably, the second lens element has a positive refractive power. Preferably, the image-side surface of the third lens element is concave in a paraxial region thereof.Preferably, the object-side surface of the fourth lens element is convex in a paraxial region thereof, and the image-side surface of the fourth lens element is concave in a paraxial region thereof. Preferably, at least one of the second to sixth lens elements includes at least one bending point in an optically effective area thereof.When an axial distance between the third lens element and the fourth lens element is T34, an axial distance between the fourth lens element and the fifth lens element is T45, an axial distance between the fifth lens element and the sixth lens element is T56, an axial distance between the object-side surface of the first lens element and the image-side surface of the second lens element of the imaging optical lens assembly is Dr1r4, a central thickness of the third lens element is CT3, a focal length of the imaging optical lens assembly is f, and a radius of curvature of the image-side surface of the third lens element is R6, the following conditions are preferably satisfied: 0.10 < (T34 + T45) / T56 < 1.6; 6.5 < Dr1r4 / CT3; and 4.4 < f / R6.

[0004] According to the imaging optical lens assembly of the above aspect, when the axial distance between the third lens element and the fourth lens element is T34, the axial distance between the fourth lens element and the fifth lens element is T45, and the axial distance between the fifth lens element and the sixth lens element is T56, the following condition is satisfied: 0.30 < (T34 + T45) / T56 < 1.4.

[0005] According to the imaging optical lens assembly of the above aspect, when the Abbe number of the second lens element is V2 and the Abbe number of the third lens element is V3, the following condition is satisfied: 1.95 < V2 / V3 < 3.50.

[0006] According to the imaging optical lens assembly of the above aspect, when the axial distance between the object-side surface of the first lens element and the image-side surface of the second lens element of the imaging optical lens assembly is Dr1r4 and an axial distance between the object-side surface of the third lens element and the image-side surface of the sixth lens element of the imaging optical lens assembly is Dr5r12, the following condition is satisfied: 1.6 < Dr1r4 / Dr5r12 < 2.3.

[0007] According to the imaging optical lens assembly of the aforementioned aspect, when a radius of curvature of the object-side surface of the third lens element is R5, a radius of curvature of the object-side surface of the fourth lens element is R7, the focal length of the imaging optical lens assembly is f, and a focal length of the fourth lens element is f4, the following conditions are satisfied: 0 < R7 / |f4| < 0.55; and |f / R5| < 0.60.

[0008] According to the imaging optical lens assembly of the above aspect, when an F-number of the imaging optical lens assembly is Fno, a maximum distance between an optical effective area of ​​the object-side surface of the second lens element and an optical axis is Y21, and a maximum image height of the imaging optical lens assembly is ImgH, the following conditions are satisfied: 2.0 <Fno<3,3; und 0,60<Y21 / ImgH<1,0.

[0009] According to one aspect of the present disclosure, an imaging optical lens assembly includes six lens elements, the six lens elements being, in order from an object side to an image side along an optical path, a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element, and a sixth lens element. Each of the six lens elements has an object-side surface toward the object side and an image-side surface toward the image side. Preferably, the object-side surface of the first lens element is convex in a paraxial region thereof. Preferably, the object-side surface of the second lens element is convex in a paraxial region thereof. Preferably, the image-side surface of the third lens element is concave in a paraxial region thereof.Preferably, the object-side surface of the fourth lens element is convex in a paraxial region thereof, and the image-side surface of the fourth lens element is concave in a paraxial region thereof. Preferably, at least one of the second to sixth lens elements includes at least one bending point in an optically effective area thereof.When an axial distance between the third lens element and the fourth lens element is T34, an axial distance between the fourth lens element and the fifth lens element is T45, an axial distance between the fifth lens element and the sixth lens element is T56, an axial distance between the object-side surface of the first lens element and the image-side surface of the second lens element of the imaging optical lens assembly is Dr1r4, a central thickness of the third lens element is CT3, a focal length of the imaging optical lens assembly is f, and a radius of curvature of the image-side surface of the third lens element is R6, the following conditions are preferably satisfied: 0.10 < (T34 + T45) / T56 < 1.6; 6.5 < Dr1r4 / CT3; and 4.4 < f / R6.

[0010] According to the imaging optical lens assembly of the above aspect, when the axial distance between the object-side surface of the first lens element and the image-side surface of the second lens element of the imaging optical lens assembly is Dr1r4, the central thickness of the third lens element is CT3, the focal length of the imaging optical lens assembly is f, and the radius of curvature of the image-side surface of the third lens element is R6, the following conditions are satisfied: 9.0 < Dr1r4 / CT3 < 45; and 4.9 < f / R6 < 8.0.

[0011] When the axial distance between the third lens element and the fourth lens element is T34, the axial distance between the fourth lens element and the fifth lens element is T45, the axial distance between the fifth lens element and the sixth lens element is T56, the axial distance between the object-side surface of the first lens element and the image-side surface of the second lens element of the imaging optical lens assembly is Dr1r4, the central thickness of the third lens element is CT3, a central thickness of the fourth lens element is CT4, the focal length of the imaging optical lens assembly is f, and the radius of curvature of the image-side surface of the third lens element is R6, according to the imaging optical lens assembly of the aforementioned aspect, the following conditions are satisfied: 0.47 ≤ (T34 + T45) / T56 ≤ 1.24; 13.80 ≤ Dr1r4 / CT3 ≤ 24.06; 5.42 ≤ f / R6 ≤ 6.25; and 0.68 ≤ CT4 / CT3 ≤ 1.16.

[0012] According to the imaging optical lens assembly of the above aspect, when the focal length of the imaging optical lens assembly is f and a radius of curvature of the image-side surface of the fourth lens element is R8, the following condition is satisfied: 1.1 < f / R8 < 4.5.

[0013] According to the imaging optical lens assembly of the above aspect, when the second lens element has a positive refractive power, the focal length of the imaging optical lens assembly is f, a focal length of the second lens element is f2, a focal length of the sixth lens element is f6, and a radius of curvature of the object-side surface of the second lens element is R3, the following conditions are satisfied: 1.3 <f2 / R3<3,0; und |f / f6|<1,1.

[0014] According to the imaging optical lens assembly of the above aspect, an optically effective area of ​​at least one surface of at least one of the first lens element to the sixth lens element is non-circular; the imaging optical lens assembly further includes a diaphragm having an optically effective area that is non-circular.

[0015] According to one aspect of the present disclosure, an imaging optical lens assembly includes six lens elements, the six lens elements being, in order from an object side to an image side along an optical path, a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element, and a sixth lens element. Each of the six lens elements has an object-side surface toward the object side and an image-side surface toward the image side. Preferably, the object-side surface of the first lens element is convex in a paraxial region thereof. Preferably, the object-side surface of the second lens element is convex in a paraxial region thereof. Preferably, the third lens element has a negative refractive power.Preferably, the object-side surface of the fourth lens element is convex in a paraxial region thereof, and the image-side surface of the fourth lens element is concave in a paraxial region thereof. Preferably, at least one of the second to sixth lens elements includes at least one bending point in an optically effective area thereof.When an axial distance between the third lens element and the fourth lens element is T34, an axial distance between the fourth lens element and the fifth lens element is T45, an axial distance between the fifth lens element and the sixth lens element is T56, an axial distance between the object-side surface of the first lens element and the image-side surface of the second lens element of the imaging optical lens assembly is Dr1r4, a central thickness of the third lens element is CT3, and a central thickness of the fourth lens element is CT4, the following conditions are preferably satisfied: 0.10 < (T34 + T45) / T56 < 1.6; 11 < Dr1r4 / CT3 < 45; and 0.10 < CT4 / CT3 < 1.7.

[0016] According to the imaging optical lens assembly of the above aspect, when the central thickness of the third lens element is CT3 and the central thickness of the fourth lens element is CT4, the following condition is satisfied: 0.40 < CT4 / CT3 < 1.4.

[0017] According to the imaging optical lens assembly of the above aspect, when the radius of curvature of the object-side surface of the third lens element is R5 and the radius of curvature of the image-side surface of the third lens element is R6, the following condition is satisfied: |R6 / R5|<0.16.

[0018] According to the imaging optical lens assembly of the above aspect, when the radius of curvature of the object-side surface of the fourth lens element is R7 and the radius of curvature of the image-side surface of the fourth lens element is R8, the following condition is satisfied: 0.85 <R8 / R7<3,0.

[0019] According to the imaging optical lens assembly of the aforementioned aspect, when half of a maximum field of view of the imaging optical lens assembly is HFOV, a maximum distance between an optically effective area of ​​the object-side surface of the second lens element and an optical axis is Y21, and a maximum distance between an optically effective area of ​​the image-side surface of the sixth lens element and the optical axis is Y62, the following conditions are satisfied: 5.0 degrees < HFOV < 20.0 degrees; and 1.1 < Y21 / Y62 < 1.5.

[0020] According to the imaging optical lens assembly of the above aspect, the first lens element has a positive refractive power; when a focal length of the first lens element is f1 and a focal length of the third lens element is f3, the following condition is satisfied: -16 < f1 / f3 < -5.0.

[0021] According to the imaging optical lens assembly of the above aspect, the fifth lens element has a positive refractive power; when a focal length of the fifth lens element is f5 and a central thickness of the fifth lens element is CT5, the following condition is satisfied: 6.0 < f5 / CT5 < 90.

[0022] According to the imaging optical lens assembly of the above aspect, the fifth lens element has a positive refractive power; when a focal length of the third lens element is f3 and a focal length of the fifth lens element is f5, the following condition is satisfied: -15 < f5 / f3 < -1.2.

[0023] According to the imaging optical lens assembly of the aforementioned aspect, the imaging optical lens assembly further includes at least one reflective surface located between the object-side surface of the first lens element and the object-side surface of the second lens element along an optical axis.

[0024] According to one aspect of the present disclosure, an imaging device includes the imaging optical lens assembly of the aforementioned aspect and an image sensor. The image sensor is arranged on an image surface of the imaging optical lens assembly.

[0025] According to the imaging device of the aforementioned aspect, at least one of the six lens elements is movable relative to the image sensor along an optical axis.

[0026] According to one aspect of the present disclosure, an electronic device includes the imaging device of the preceding aspect. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic view of an imaging device in the 1st state according to the 1st embodiment of the present disclosure. Fig. 2A shows spherical aberration curves, astigmatic field curves, and a distortion curve of the imaging device in the 1st state according to the 1st embodiment. Fig. 2B shows spherical aberration curves, astigmatic field curves, and a distortion curve of the imaging device in the 2nd state according to the 1st embodiment. Fig. 3 is a schematic view of an imaging device in the 1st state according to the 2nd embodiment of the present disclosure. Fig.4A shows spherical aberration curves, astigmatic field curves, and a distortion curve of the imaging device in the 1st state according to the 2nd embodiment. Fig. 4B shows spherical aberration curves, astigmatic field curves, and a distortion curve of the imaging device in the 2nd state according to the 2nd embodiment. Fig. 5 is a schematic view of an imaging device in the 1st state according to the 3rd embodiment of the present disclosure. Fig. 6A shows spherical aberration curves, astigmatic field curves, and a distortion curve of the imaging device in the 1st state according to the 3rd embodiment. Fig. 6B shows spherical aberration curves, astigmatic field curves, and a distortion curve of the imaging device in the 2nd state according to the 3rd embodiment. Fig.7 is a schematic view of an imaging device in the 1st state according to the 4th embodiment of the present disclosure. Fig. 8A shows spherical aberration curves, astigmatic field curves, and a distortion curve of the imaging device in the 1st state according to the 4th embodiment. Fig. 8B shows spherical aberration curves, astigmatic field curves, and a distortion curve of the imaging device in the 2nd state according to the 4th embodiment. Fig. 9 is a schematic view of an imaging device in the 1st state according to the 5th embodiment of the present disclosure. Fig. 10A shows spherical aberration curves, astigmatic field curves, and a distortion curve of the imaging device in the 1st state according to the 5th embodiment. Fig.10B shows spherical aberration curves, astigmatic field curves, and a distortion curve of the imaging device in the 2nd state according to the 5th embodiment. Fig. 11 is a schematic view of an imaging device in the 1st state according to the 6th embodiment of the present disclosure. Fig. 12A shows spherical aberration curves, astigmatic field curves, and a distortion curve of the imaging device in the 1st state according to the 6th embodiment. Fig. 12B shows spherical aberration curves, astigmatic field curves, and a distortion curve of the imaging device in the 2nd state according to the 6th embodiment. Fig. 13 is a schematic view of the folded light path of the imaging device according to the first embodiment of the present disclosure. Fig.14 is a schematic view of the imaging device according to the first embodiment of the present disclosure with a light path folding element E8 of a different type. Fig. 15A is a schematic view of the second lens element according to the first embodiment of Fig. 1. Fig. 15B is a schematic view of the optically effective area of ​​the object-side surface of the second lens element and the parameters according to the 1st embodiment of Fig. 1. Fig. 16 is a schematic view of the aperture and parameters according to the 1st embodiment of Fig. 1. Fig. 17 is a schematic view of the folded light path of the imaging device according to the 6th embodiment of the present disclosure. Fig. 18A is a schematic view of a side of an electronic device according to the 7th embodiment of the present disclosure. Fig. 18B is a schematic view of another side of the electronic device of Fig. 18A. Fig. 18C is a schematic system view of the electronic device of Fig. 18A. Fig. 19 is a schematic view of one side of an electronic device according to the 8th embodiment of the present disclosure. Fig. 20A is a schematic view of an arrangement of a light path folding element in the imaging optical lens assembly of the present disclosure. Fig. 20B is a schematic view of another arrangement of the light path folding element in the imaging optical lens assembly of the present disclosure. Fig. 20C is a schematic view of an arrangement of two light path folding elements in the imaging optical lens assembly of the present disclosure. DETAILED DESCRIPTION

[0027] The present disclosure provides an imaging optical lens assembly including six lens elements, wherein the six lens elements are, in order from an object side to an image side along an optical path, a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element, and a sixth lens element. Each of the six lens elements has an object-side surface facing the object side and an image-side surface facing the image side.

[0028] The first lens element may have a positive refractive power, making it favorable for compressing the volume on the object side of the imaging optical lens assembly. The object-side surface of the first lens element is convex in a paraxial region thereof, making it capable of compressing the outer diameter of the object side of the imaging optical lens assembly. If the imaging optical lens assembly can further include a reflective surface that is rotatable relative to the image sensor, this is advantageous for improving image compensation capability.

[0029] The second lens element may have a positive refractive power, such that it is favorable for compressing the volume on the object side of the imaging optical lens assembly. The object-side surface of the second lens element may be convex in a paraxial region thereof, such that it is favorable for compressing the outer diameter of the object side of the imaging optical lens assembly.

[0030] The third lens element may have a negative refractive power, making it beneficial for balancing the refractive power on the object side of the imaging optical lens assembly to reduce aberrations such as spherical aberration. The image-side surface of the third lens element may be concave in a paraxial region, reducing surface reflection by adjusting the angle of light incident on the fourth lens element.

[0031] The object-side surface of the fourth lens element is convex in a paraxial region thereof, making it favorable for compressing the outer diameter of the image side of the imaging optical lens assembly by adjusting the light movement direction. The image-side surface of the fourth lens element is concave in a paraxial region, making it favorable for correcting aberrations such as astigmatism by adjusting the surface shape of the fourth lens element.

[0032] The fifth lens element may have a positive refractive power so that it is favorable for compressing the volume on the image side of the imaging optical lens assembly.

[0033] At least one of the second to sixth lens elements includes at least one bending point in an optical effective surface thereof. Therefore, the variation of the surface of the lens element can be improved, and it is favorable for compressing the size of the lens element and improving image quality. Specifically, at least one of the second lens elements to the sixth lens element including at least one bending point in the optical effective surface thereof constitutes at least one of the object-side surface and the image-side surface of the at least one of the second lens elements to the sixth lens element including at least one inflection point in the optical effective surface thereof. Further, each of the at least two of the second lens elements to the sixth lens element includes at least one bending point in the optical effective surface thereof.

[0034] An optically effective area of ​​at least one surface of the first lens element to the sixth lens element may not be circular. Therefore, it is favorable for compressing the volume of the imaging optical lens assembly to expand the application range. In particular, at least one surface of at least one of the first lens element to the sixth lens element represents at least one of the object-side surface and the image-side surface of at least one of the first lens element to the sixth lens element.

[0035] The imaging optical lens assembly may further include a diaphragm having a non-circular optical effective area. Therefore, it is beneficial for compressing the volume of the imaging optical lens assembly to expand the application range.

[0036] The imaging optical lens assembly may further include at least one reflective surface located between the object-side surface of the first lens element and the object-side surface of the second lens element along the optical axis. Therefore, it is favorable for adjusting the space layout to reduce design constraints. Furthermore, the reflective surface may be provided by a prism, thus favoring an increase in assembly yield. When the imaging optical lens assembly is mounted on the imaging device, the reflective surface can be rotated relative to the image sensor (such as roll, pitch, or yaw motion, etc.). Therefore, it is favorable for compensating for the relative variation in position between the image and the image sensor to achieve effects such as optical image stabilization, etc.

[0037] Specifically, according to the present disclosure, the reflective surface may be arranged in a light path folding element. Furthermore, the reflective surface may be provided by a prism or a mirror, etc. The surface of the prism or the surface of the mirror may be flat or non-flat, such as a spherical surface, an aspherical surface, or a free-form surface, etc., but the present disclosure is not limited thereto.

[0038] When the axial distance between the third lens element and the fourth lens element is T34, the axial distance between the fourth lens element and the fifth lens element is T45, and the axial distance between the fifth lens element and the sixth lens element is T56, the following condition is satisfied: 0.10 < (T34 + T45) / T56 < 1.6. Therefore, it is favorable for maintaining a balance between volume arrangement and image quality by adjusting the lens elements. Furthermore, the following condition can be satisfied: 0.30 < (T34 + T45) / T56 < 1.4. Furthermore, the following condition can be satisfied: 0.47 ≤ (T34 + T45) / T56 ≤ 1.24.

[0039] When an axial distance between the object-side surface of the first lens element and the image-side surface of the second lens element of the imaging optical lens assembly is Dr1r4 and a central thickness of the third lens element is CT3, the following condition is satisfied: 6.5 < Dr1r4 / CT3 or Dr1r4 / CT3 < 45. Therefore, it is favorable for maintaining the balance between the field of view and the volume arrangement and also for adjusting the arrangement of the reflective surface by adjusting the arrangement of the lens elements on the object side of the imaging optical lens assembly. In addition, the following condition can be met: 9.0 < Dr1r4 / CT3, 11 < Dr1r4 / CT3, Dr1r4 / CT3 < 37 or Dr1r4 / CT3 < 30. In addition, the following condition can be met: 9.0 < Dr1r4 / CT3 < 45. In addition, the following condition can be met: 11 < Dr1r4 / CT3 < 45. In addition, the following condition can be met: 13.80 ≤ Dr1r4 / CT3 ≤ 24.06.

[0040] When a focal length of the imaging optical lens assembly is f and a radius of curvature of the image-side surface of the third lens element is R6, the following condition is satisfied: 4.4 < f / R6 or f / R6 < 8.0. Therefore, it is favorable to adjust the field of view and correct aberrations by adjusting the surface shape and refractive power of the third lens element. In addition, the following condition can be satisfied: 4.9 < f / R6, f / R6 < 7.4, or f / R6 < 6.8. In addition, the following condition can be satisfied: 4.9 < f / R6 < 8.0. In addition, the following condition can be satisfied: 5.42 ≤ f / R6 ≤ 6.25.

[0041] When the central thickness of the third lens element is CT3 and the central thickness of the fourth lens element is CT4, the following condition is satisfied: 0.10 < CT4 / CT3 < 1.7. Therefore, the cooperation between the third lens element and the fourth lens element is beneficial for balancing the volume distribution between the object side and the image side of the imaging optical lens assembly. Furthermore, the following condition can be satisfied: 0.40 < CT4 / CT3 < 1.4. Furthermore, the following condition can be satisfied: 0.68 ≤ CT4 / CT3 ≤ 1.16.

[0042] When the Abbe number of the second lens element is V2 and the Abbe number of the third lens element is V3, the following condition is satisfied: 1.95 < V2 / V3 < 3.50. Therefore, it is beneficial to correct aberrations such as chromatic aberration by matching the materials of the second lens element and the third lens element.

[0043] When the axial distance between the object-side surface of the first lens element and the image-side surface of the second lens element of the imaging optical lens assembly is Dr1r4, and the axial distance between the object-side surface of the third lens element and the image-side surface of the sixth lens element of the imaging optical lens assembly is Dr5r12, the following condition is satisfied: 1.6 < Dr1r4 / Dr5r12 < 2.3. Therefore, it is favorable for maintaining the balance between the field of view and the volume arrangement by adjusting the arrangement of the lens elements of the imaging optical lens assembly.

[0044] When the radius of curvature of the object-side surface of the fourth lens element is R7 and the focal length of the fourth lens element is f4, the following condition is satisfied: 0 < R7 / |f4| < 0.55. Therefore, it is beneficial for correcting aberrations by adjusting the surface shape and refractive power of the fourth lens element. Furthermore, the following condition can be satisfied: 0 < R7 / |f4| < 0.40.

[0045] When the radius of curvature of the object-side surface of the third lens element is R5 and the focal length of the imaging optical lens assembly is f, the following condition is satisfied: |f / R5| < 0.60. Therefore, it is favorable for correcting aberrations by adjusting the surface shape and refractive power of the third lens element. Furthermore, the following condition can be satisfied: |f / R5| < 0.45.

[0046] When an aperture number of the optical lens assembly is Fno, the following condition is satisfied: 2.0 < Fno < 3.3. Therefore, it is favorable for balancing depth of field and exposure.

[0047] When a maximum distance between an optically effective area of ​​the object-side surface of the second lens element and an optical axis is Y21 and a maximum image height of the imaging optical lens assembly is ImgH (which may be half of a diagonal length of an effective photosensitive area of ​​the image sensor), the following condition is satisfied: 0.60 < Y21 / ImgH < 1.0. Therefore, it is favorable for maintaining the balance between the compression of the outer diameter of the lens element and the enlargement of the image surface.

[0048] When the focal length of the imaging optical lens assembly is f and the radius of curvature of the image-side surface of the fourth lens element is R8, the following condition is satisfied: 1.1 < f / R8 < 4.5. Therefore, it is favorable for adjusting the field of view within a reasonable range by adjusting the surface shape and refractive power of the fourth lens element. Furthermore, the following condition can be satisfied: 1.4 < f / R8 < 4.0.

[0049] When a focal length of the second lens element is f2 and a radius of curvature of the object-side surface of the second lens element is R3, the following condition is satisfied: 1.3 < f2 / R3 < 3.0. Therefore, it is favorable for compressing the volume of the object side of the imaging optical lens assembly by adjusting the surface shape and refractive power of the second lens element.

[0050] When the focal length of the imaging optical lens assembly is f and the focal length of the sixth lens element is f6, the following condition is satisfied: |f / f6| < 1.1. Therefore, it is favorable for correcting aberrations by adjusting the refractive power of the sixth lens element.

[0051] When the radius of curvature of the object-side surface of the third lens element is R5 and the radius of curvature of the image-side surface of the third lens element is R6, the following condition is satisfied: |R6 / R5| < 0.16. Therefore, adjusting the surface shape of the third lens element is beneficial for compressing the outer diameter of the lens element and reducing aberrations. Furthermore, the following condition can be satisfied: |R6 / R5| < 0.12.

[0052] When a radius of curvature of the object-side surface of the fourth lens element is R7 and the radius of curvature of the image-side surface of the fourth lens element is R8, the following condition is satisfied: 0.85 < R8 / R7 < 3.0. Therefore, it is favorable for compressing the outer diameter of the image side of the imaging optical lens assembly by adjusting the light movement direction.

[0053] When one half of the maximum field of view of the imaging optical lens assembly is HFOV, the following condition is met: 5.0 degrees < HFOV < 20.0 degrees. Therefore, it is favorable for adjusting the field of view to suit the application. Furthermore, the following condition can be met: 8.0 degrees < HFOV < 16.0 degrees.

[0054] When a maximum distance between an optically effective area of ​​the object-side surface of the second lens element and the optical axis is Y21, and a maximum distance between an optically effective area of ​​the image-side surface of the sixth lens element and the optical axis is Y62, the following condition is satisfied: 1.1 < Y21 / Y62 < 1.5. Therefore, it is favorable for compressing the outer diameter of the lens element by adjusting the light moving direction.

[0055] When the focal length of the first lens element is f1 and the focal length of the third lens element is f3, the following condition is satisfied: -16 < f1 / f3 < -5.0. Therefore, it is beneficial to correct aberrations by adjusting the arrangement of the refractive power on the object side of the imaging optical lens assembly.

[0056] When the focal length of the fifth lens element is f5 and the central thickness of the fifth lens element is CT5, the following condition is satisfied: 6.0 < f5 / CT5 < 90. Therefore, adjusting the surface shape and refractive power of the fifth lens element is beneficial for compressing the volume of the image side of the imaging optical lens assembly. Furthermore, the following condition can be satisfied: 9.0 < f5 / CT5 < 75. Furthermore, the following condition can be satisfied: 11 < f5 / CT5 < 60.

[0057] When the focal length of the third lens element is f3 and the focal length of the fifth lens element is f5, the following condition is satisfied: -15 < f5 / f3 < -1.2. Therefore, it is beneficial for correcting aberrations by adjusting the refractive power arrangement of the imaging optical lens assembly. Furthermore, the following condition can be satisfied: -12 < f5 / f3 < -1.6. Furthermore, the following condition can be satisfied: -10 < f5 / f3 < -2.0.

[0058] Each of the above-mentioned features of the optical imaging lens assembly can be used in various combinations to achieve the corresponding effects.

[0059] According to the imaging optical lens assembly of the present disclosure, the lens elements thereof can be made of glass or plastic. When the lens elements are made of glass, the distribution of refractive power of the imaging optical lens assembly can be made more flexible. The glass lens element can be manufactured either by grinding or molding. When the lens elements are made of plastics, the manufacturing cost can be significantly reduced. Furthermore, the surfaces of the individual lens elements can be arranged to be spherical or aspherical (ASP). Spherical lens elements are easy to manufacture.Aspherical lens elements have more controllable variables for eliminating aberrations and further reducing the required number of lens elements in the imaging optical lens assembly, thus also reducing the overall track length of the imaging optical lens assembly. The aspherical surfaces can be formed by plastic injection molding, glass molding, or other manufacturing processes.

[0060] According to the imaging optical lens assembly of the present disclosure, additives that produce light absorption and interference effects can be selectively added to one (or more) materials of the lens elements to change the transmittance of the lens element in a specific wavelength range. This can reduce stray light and chromatic aberration. For example, the additives can have the ability to filter light in a wavelength range of 600 nm - 800 nm in the imaging optical lens assembly to reduce extra red light or infrared light, or the additives can have the ability to filter light in a wavelength range of 350 nm - 450 nm in the imaging optical lens assembly to reduce blue light or ultraviolet light. Therefore, additives can prevent the image from being distorted by light in a specific wavelength range.Furthermore, the additives can be homogeneously mixed with the plastic and the lens elements can be manufactured using the injection molding process. Furthermore, the additives can be applied to the lens surfaces to provide the aforementioned effects.

[0061] According to the imaging optical lens assembly of the present disclosure, when a surface of the lens element is aspherical, this indicates that all or part of the optically effective area of ​​the surface of the lens element is aspherical.

[0062] According to the imaging optical lens assembly of the present disclosure, when the lens elements have convex surfaces and the position of the convex surface is not defined, this indicates that the aforementioned surfaces of the lens elements may be convex in the paraxial region thereof. When the lens elements have surfaces that are concave and the position of the concave surface is not defined, this indicates that the aforementioned surfaces of the lens elements may be concave in the paraxial region thereof. In the imaging optical lens assembly of the present disclosure, when the lens element has a positive refractive power or a negative refractive power, or the focal length of the lens element, all can be referred to the refractive power or the focal length in the paraxial region of the lens element.

[0063] According to the imaging optical lens assembly of the present disclosure, a critical point is a non-axial point of the lens surface where its tangent is perpendicular to the optical axis; a bend point is a point on a lens surface whose curvature changes from positive to negative or from negative to positive.

[0064] According to the imaging optical lens assembly of the present disclosure, the image surface thereof may be flat or curved based on the corresponding image sensor. Specifically, the image surface may be a concave curved surface facing the object side. Furthermore, the imaging optical lens assembly of the present disclosure may selectively include at least one image correction element (such as a field flattener) interposed between the lens element closest to the image surface and the image surface, thereby achieving the effect of correcting image aberrations (such as field curvature). The optical properties of the aforementioned image correction element, such as curvature, thickness, refractive index, position, surface shape (convex or concave, spherical or aspherical, diffraction surface and Fresnel surface, etc.), can be adjusted according to the requirements of the imaging device.In general, a preferable configuration of the image correction element is that a thin plano-concave element having a concave surface toward the object side is arranged at the position near the image surface.

[0065] According to the imaging optical lens assembly of the present disclosure, at least one element with a light path folding function, such as a prism or a mirror, can be selectively arranged between the imaged object and the image surface. The surface shape of the prism or the mirror can be a planar, spherical, aspherical, or free-form surface. Therefore, it is favorable for providing a highly flexible spatial arrangement of the imaging optical lens assembly, so that the compactness of the electronic device is not limited by the total optical track length of the imaging optical lens assembly. Fig.20A is a schematic view of an arrangement of a light path folding element LF in the imaging optical lens assembly of the present disclosure. Fig. 20B is a schematic view of another arrangement of the light path folding element LF in the imaging optical lens assembly of the present disclosure. As shown in Fig. 20A and Fig. 20B, the imaging optical lens assembly includes, in order from an imaged object (not shown in the drawings) to an image surface IMG, a first optical axis OA1, the light path folding element LF, and a second optical axis OA2, wherein the light path folding element LF may be arranged between the imaged object and a lens group LG of the imaging optical lens assembly, as shown in Fig. 20A, or may be arranged between the lens group LG of the imaging optical lens assembly and the image surface IMG, as shown in Fig.20B. In addition, Fig. 20C is a schematic view of an arrangement of two light path folding elements LF1, LF2 in the imaging optical lens assembly of the present disclosure. As in Fig.20C, the imaging optical lens assembly includes, in order from an imaged object (not shown in the drawings) to an image surface IMG, a first optical axis OA1, the light path folding element LF1, a second optical axis OA2, the light path folding element LF2, and a third optical axis OA3, wherein the light path folding element LF1 is arranged between the imaged object and a lens group LG of the imaging optical lens assembly, and the light path folding element LF2 is arranged between the lens group LG of the imaging optical lens assembly and the image surface IMG. The imaging optical lens assembly can also be selectively arranged with three or more light path folding elements; the type, quantity, and location of the light path folding elements are not limited to the present disclosure.

[0066] Furthermore, according to the imaging optical lens assembly of the present disclosure, the imaging optical lens assembly may include at least one stop, such as an aperture stop, a glare stop, or a field stop, for eliminating stray light and thereby improving image resolution.

[0067] According to the imaging optical lens assembly of the present disclosure, the aperture stop can be configured as a front stop or a center stop, where the front stop indicates that the aperture stop is disposed between an object and the first lens element, and the center stop indicates that the aperture stop is disposed between the first lens element and the image surface. When the aperture stop is a front stop, a larger distance can be obtained between an exit pupil of the imaging optical lens assembly and the image surface, thereby obtaining a telecentric effect and improving the image pickup efficiency of the image sensor, such as a CCD or CMOS. The center stop is beneficial for enlarging the field of view of the imaging optical lens assembly, thereby providing a wider field of view therefor.

[0068] According to the imaging optical lens assembly of the present disclosure, an aperture control unit can be properly configured. The aperture control unit can be a mechanical element or a light control element, and the size and shape of the aperture control unit can be electrically controlled. The mechanical element can include a movable component such as a blade group or a shielding plate. The light control element can include a filter component such as a light filter, an electrochromic material, a liquid crystal layer, or the like. The amount of incident light or the exposure time of the image can be controlled by the aperture control unit to improve image moderation capability.Furthermore, the aperture control unit may be the aperture stop of the imaging optical lens assembly according to the present disclosure to improve image quality by changing the f-number, such as by changing the depth of field or the exposure speed.

[0069] According to the imaging optical lens assembly of the present disclosure, one or more optical elements can be configured to restrict the shape of light passing through the imaging optical lens assembly. Each optical element can be, but is not limited to, a filter, a polarizer, etc. Each optical element can be, but is not limited to, a single-piece element, a composite component, a thin film, etc. The optical element can be disposed on the object side or the image side of the imaging optical lens assembly, or between any two adjacent lens elements, to transmit light in a specific shape, thereby meeting the requirements of the application.

[0070] The imaging optical lens assembly according to the present disclosure may include at least one optical lens element, an optical element, or a substrate having at least one surface with a low-reflection layer, wherein the low-reflection layer is advantageous for effectively reducing stray light formed by the reflection of light at the interface. The low-reflection layer may be disposed on the non-optically effective surface of the object-side surface or the image-side surface of the optical lens element, or may be disposed on the connecting surface between the object-side surface and the image-side surface; wherein the optical element may include a light-blocking element, an annular spacer element, a mount element, a cover glass, a blue glass, a filter or a color filter, a light-path folding element, a prism, or a mirror, etc.wherein the support may be a lens group base, a microlens arranged on the image sensor, the periphery of the image sensor substrate, or a glass sheet for protecting the image sensor, etc.

[0071] According to the imaging optical lens assembly of the present disclosure, the object side and the image side are defined according to the direction of the optical axis, and the axial value along the optical axis is calculated.

[0072] According to the imaging optical lens assembly of the present disclosure, the imaging optical lens assembly of the present disclosure can be applied for 3D (three-dimensional) image sensing applications in products such as digital cameras, mobile devices, digital tablets, smart TVs, surveillance systems, motion detection input devices, driving record systems, rear view camera systems, wearable devices, unmanned aerial vehicles, and other electronic imaging products.

[0073] According to the present disclosure, an imaging device includes the aforementioned imaging optical lens assembly and an image sensor, wherein the image sensor is disposed on the image surface of the imaging optical lens assembly. By adjusting the arrangement of the lens elements in the imaging optical lens assembly, it is favorable for balancing the volume arrangement, image quality, and field of view, and it is also favorable for the arrangement of the reflective surface. Furthermore, the imaging device may also include a mount element, a holder element, or a combination thereof.

[0074] According to the present disclosure, at least one of the six lens elements can be moved relative to the image sensor along the optical axis to achieve effects such as zooming or focusing, etc. Therefore, it is beneficial for expanding the application range of the imaging optical lens assembly. In the imaging device, at least two, three, four, or five of the six lens elements can be movable relative to the image sensor along the optical axis. Furthermore, the lens elements can also be movable for focusing, which corresponds to the variation in the object distance.

[0075] According to the present disclosure, an electronic device is provided that includes the above-mentioned imaging device. This allows image quality to be improved. Furthermore, the electronic device may further include a control unit, a display, a storage unit, a random access memory (RAM), or a combination thereof.

[0076] In accordance with the foregoing description of the present disclosure, the following specific embodiments are provided for further explanation. <1. Embodiment>

[0077] Fig. 1 is a schematic view of an imaging device 1 in the 1st state according to the 1st embodiment of the present disclosure. Fig. 2A shows spherical aberration curves, astigmatic field curves and a distortion curve of the imaging device 1 in the 1st state according to the 1st embodiment. Fig.Fig. 2B shows spherical aberration curves, astigmatic field curves, and a distortion curve of the imaging device 1 in the 2nd state according to the 1st embodiment. In Fig.1, the imaging device 1 includes an imaging optical lens assembly (the reference numeral is omitted) and an image sensor LS. The imaging optical lens assembly includes, in order from an object side to an image side along an optical path, a first lens element E1, a light path folding element E8, a diaphragm S1, a second lens element E2, a third lens element E3, a fourth lens element E4, a fifth lens element E5, a diaphragm S2, a sixth lens element E6, a diaphragm S3, a filter E7, and an image surface IMG, with the image sensor IS disposed on the image surface IMG of the imaging optical lens assembly. The imaging optical lens assembly includes six lens elements (E1, E1, E2, E3, E4, E5, E6) without one or more additional lens elements interposed between the first lens element E1 and the sixth lens element E6.

[0078] The first lens element E1 with positive refractive power has an object-side surface that is convex in a paraxial region thereof and an image-side surface that is concave in a paraxial region. The first lens element E1 is made of plastic and has an object-side surface and an image-side surface, both of which are aspherical.

[0079] The second lens element E2 with positive refractive power has an object-side surface that is convex in a paraxial region thereof and an image-side surface that is convex in a paraxial region thereof. The second lens element E2 is made of glass and has an object-side surface and an image-side surface, both of which are aspherical. Furthermore, Fig. 15A is a schematic view of the second lens element E2 according to the first embodiment of Fig. 1. In Fig.15A, the second lens element E2 includes at least one bending point IP in an optically effective surface thereof; specifically, the object-side surface of the second lens element E2 includes a bending point IP in the optically effective surface thereof in both the 1st state and the 2nd state. In each of the embodiments in the present disclosure, only the bending points in the optically effective surface of a part of the lens elements in some states are exemplified and are not limited thereto. In the present disclosure, each state of each embodiment, each of the object-side surface and the image-side surface of each lens element may include at least one bending point in the optically effective surface.

[0080] The third lens element E3 with negative refractive power has an object-side surface that is convex in a paraxial region thereof and an image-side surface that is concave in a paraxial region thereof. The third lens element E3 is made of plastic and has both the object-side surface and the image-side surface that are aspherical. Furthermore, the third lens element E3 includes at least one bending point (its reference numeral is omitted) in the optical effective surface.

[0081] The fourth lens element E4 with positive refractive power has an object-side surface that is convex in a paraxial region thereof and an image-side surface that is concave in a paraxial region thereof. The fourth lens element E4 is made of plastic and has the object-side surface and the image-side surface, both of which are aspherical. Furthermore, the fourth lens element E4 includes at least one bending point (its reference numeral is omitted) in the optical effective surface.

[0082] The fifth lens element E5 with positive refractive power has an object-side surface that is convex in a paraxial region thereof and an image-side surface that is convex in a paraxial region thereof. The lens element E5 is made of plastic and has the object-side surface and the image-side surface, both of which are aspherical. Furthermore, the fifth lens element E5 includes at least one bending point (its reference numeral is omitted) in the optical effective surface.

[0083] The sixth lens element E6 with positive refractive power has an object-side surface that is convex in a paraxial region thereof and an image-side surface that is concave in a paraxial region thereof. The sixth lens element E6 is made of plastic and has both the object-side surface and the image-side surface aspherical.

[0084] The light path folding element E8 is arranged between the first lens element E1 and the second lens element E2 along the optical axis. The light path folding element E8 is a prism made of glass material. The light path folding element E8 has a reflective surface and is rotatable relative to the image sensor IS.

[0085] The filter E7 is made of glass material, which is arranged between the sixth lens element E6 and the image surface IMG, and does not affect the focal length of the imaging optical lens assembly.

[0086] The imaging optical lens assembly may include at least one reflective surface located between the object-side surface of the first lens element E1 and the object-side surface of the second lens element E2 along the optical axis. According to the first embodiment, the reflective surface is disposed on the light path folding element E8. In the present disclosure, the type and arrangement of the reflective surface and the light path folding element E8 are not limited to the shown state. For example, the reflective surface may be provided by the prism or the mirror, etc., and the surface of the prism or the surface of the mirror may be flat or non-flat, such as a spherical surface, an aspherical surface, or a free-form surface, etc., but the present disclosure is not limited thereto. Fig.13 is a schematic view of the folded light path of the imaging device 1 according to the first embodiment of the present disclosure. In Fig. 13, the light path is folded by the reflecting surface of the light path folding element E8, which is consistent with the Fig. 1, which is not folded. In the present disclosure, the folded light path of the Fig. 13 and will not be described again. In addition, Fig. 14 is a schematic view of the imaging device 1 according to the first embodiment of the present disclosure with a light path folding element E8 of a different type. Fig. 14, the light path folding element E8 may be arranged as the mirror that can fold the light path.

[0087] The reflective surface may be rotatable relative to the image sensor IS (such as roll, pitch, or yaw movements, etc.), which can compensate for the relative positional variation between the image and the image sensor IS, and the rotation method can be adjusted as needed. For example, the first lens element E1 may be moved together with the light path folding element E8 to rotate relative to the image sensor IS, or the light path folding element E8 may be the only one rotated relative to the image sensor IS, and the present disclosure is not limited thereto.

[0088] The optically effective area of ​​each surface of each lens element may not be circular in any state. Fig. 15B is a schematic view of the optically effective area E21 of the object-side surface of the second lens element E2 and the parameters according to the 1st embodiment of Fig. 1. In Fig.15B, according to the first embodiment, the optically effective area E21 of the object-side surface of the second lens element E2 is non-circular in both the 1st state and the 2nd state. The non-circular shape may be Fig. 15B, but may be arranged in other non-circular types, not limited thereto, if desired.

[0089] The optically effective area of ​​the individual apertures cannot be circular in any state. Fig. 16 is a schematic view of the aperture S1 and the parameters according to the 1st embodiment of Fig. 1. In Fig. 16, according to the first embodiment, the optically effective surface of the diaphragm S1 is non-circular in both the 1st and 2nd states, and a maximum distance between the optically effective surface of the diaphragm S1 and the optical axis is YS. The non-circular shape can be Fig.16, but may, if desired, be arranged in other non-circular types, not limited thereto.

[0090] The equation for the aspherical surface profiles of the above-mentioned lens elements of the 1st embodiment is expressed as follows: X(Y)=(Y2 / R) / (1+sqrt(1−(1+k)×(Y / R)2))+∑i(Ai)×(Yi) where X is the displacement parallel to the optical axis from the intersection of the aspherical surface and the optical axis to a point at a distance Y from the optical axis on the aspherical surface; Y is the vertical distance between the point on the aspherical surface and the optical axis; R is the radius of curvature; k is the conical coefficient; and Ai is the i-th aspherical coefficient.

[0091] The detailed optical data of the 1st embodiment are shown in Table 1A and the data of the aspherical surface are shown in Table 1B. Table 1A - 1. Embodiment Surface # radius of curvature thickness material index Abbe number Focal length 0 object plan D0 1 Lens 1 11,2737 ASP 0,692 plastic 1,545 56,1 83,05 2 14,6884 ASP 1,789 3 prism plan 6,600 Glass 1,785 25,7 - 4 plan D4 5 aperture plan -0,897 6 Lens 2 5,0866 ASP 2,108 Glass 1,589 61,2 7,83 7 -41,8803 ASP 0,100 8 Lens 3 58,6513 ASP 0,724 plastic 1,587 28,3 -6,37 9 3,5001 ASP 0,431 10 Lens 4 5,2318 ASP 0,840 plastic 1,615 25,4 44,65 11 6,0691 ASP 0, 869 12 Lens 5 131,5208 ASP 0,994 plastic 1,705 14,0 51,44 13 -49,8922 ASP 0,140 14 aperture plan 2,266 15 Lens 6 3,4108 ASP 0,491 plastic 1,544 56,0 273,35 16 3,3138 ASP 0,642 17 aperture plan D17 18 filter plan 0,110 Glass 1,517 64,2 - 19 plan 1,000 20 Picture plan - The reference wavelength is 587.6 nm (d-line). The prism has a reflective surface. The maximum distance between the optically effective area of ​​surface 5 (aperture S1) and the optical axis is 3.155 mm. The maximum distance between the optically effective area of ​​surface 14 (aperture S2) and the optical axis is 2.366 mm. The maximum distance between the optically effective area of ​​the surface 17 (aperture S3) and the optical axis is 2,440 mm. Table 1B - Aspherical coefficients Surface # 1 2 6 7 k = -1,11057E-01 4,36310E-01 1,03388E-01 0,00000E+00 A4 = -1,4333890E-04 -2,1666880E-04 -1,5166729E-03 -8,1656081E-03 A6 = 1,4815887E-05 1,9826262E-05 1,0061815E-04 3,3774530E-03 A8 = -1,8766281 E-06 -2,3728780E-06 -1,7653598E-05 -7,6340010E-04 A10 = 1,6962849E-07 2,1922190E-07 2,8670288E-06 7,5592277E-05 A12 = -9,2369355E-09 -1,2678966E-08 -4,0848410E-07 2,3096154E-06 A14 = 2,8113751E-10 4,1544764E-10 3,1198206E-08 -1,4965538E-06 A16 = -4,4839509E-12 -7,2063352E-12 -1,2993208E-09 1,6824332E-07 A18 = 2,8174136E-14 5,0590833E-14 -8,5656121E-09 A20 = 1,7130468E-10 Surface # 8 9 10 11 k = 0,00000E+00 5,63678E-02 -4,85335E-01 -5,92002E-03 A4 = -2,6511927E-03 6,5017920E-03 -2,3038797E-03 -3,1880655E-03 A6 = -1,3779201E-03 -1,1959086E-02 -5,7993624E-03 -2,1452885E-03 A8 = 1,3861338E-03 5,2369666E-03 2,2254094E-03 1,7537373E-03 A10 = -6,0074903E-04 -1,4077299E-03 -1,2427664E-04 -4,8299524E-04 A12 = 1,4359972E-04 1,9462176E-04 -1,6039651E-04 6,3414042E-05 A14 = -2,0470176E-05 -1,7030300E-06 6,1379465E-05 2,9489160E-07 A16 = 1,7476057E-06 -3,2426290E-06 -1,0333266E-05 -1,2748340E-06 A18 = -8,2743501E-08 4,0909186E-07 8,6778574E-07 1,4858874E-07 A20 = 1,6735646E-09 -1,6942114E-08 -2,9884458E-08 -5,4523090E-09 Surface # 12 13 15 16 k = 0,00000E+00 0,00000E+00 -2,82267E-02 2,43298E-03 A4 = 5,3409796E-03 2,9151787E-03 -1,3728576E-02 -1,5071549E-02 A6 = 1,5060831 E-04 5,8898223E-04 5,3945907E-04 5,9792072E-04 A8 = 1,9288087E-04 -3,9266289E-06 3,8357521 E-05 1,9510353E-05 A10 = -1,0956278E-04 -3,7715832E-05 -2,2250075E-05 -1,4075568E-05 A12 = 2,4593946E-05 1,0548224E-05 5,1841495E-06 1,8830481E-06 A14 = -2,7568108E-06 -1,2003589E-06 -7,6066333E-07 -1,0577013E-07 A16 = 1,4612994E-07 5,8326313E-08 6,5728449E-08 9,4439029E-10 A18 = -2,2081220E-09 -2,5389903E-09

[0092] Table 1A shows the radius of curvature, thickness, and focal length in millimeters (mm). Surface numbers 0-20 represent the surfaces arranged along the optical axis from the object side to the image side. The index is measured according to the reference wavelength. In Table 1B, k represents the conical coefficient of the equation of the aspherical surface profiles. A4-A20 represent the aspherical coefficients from the 4th to the 20th order. The tables shown below for each embodiment correspond to the schematic parameters and aberration curves of each embodiment, and the definitions of the tables are the same as in Table 1A and Table 1B of the 1st embodiment. Therefore, an explanation in this regard will not be provided again.

[0093] See Fig. 1, Fig. 2A and Fig. 2B. The values ​​of f, Fno, HFOV, D0, D4 and D17 in the 1st state (as in Fig.1 and Fig. 2A) and in the 2nd state (as shown in Fig. 2B) are shown in Table 1C. A focal length of the imaging optical lens assembly is f, an F-number of the imaging optical lens assembly is Fno, half of a maximum field of view of the imaging optical lens assembly is HFOV, and the definitions of D0, D4, and D17 can refer to Table 1A, where D0 is the central thickness of surface 0, D4 is the central thickness of surface 4, and D17 is the central thickness of surface 17. In the present disclosure, each embodiment may assume other states or assume only the 1st or 2nd state and is not limited thereto. For other states, the values ​​of D0, D4, and D17 may be between the 1st and 2nd states, or may be greater or smaller than the 1st or 2nd state, for example. Table 1C - 1st embodiment Condition 1. 2. f (mm) 19,12 19,03 Fno 2,69 2,79 HFOV (degree) 11,7 11,4 D0 infinity 800,000 D4 2,147 1,655 D17 5,941 6,433

[0094] According to the imaging optical lens assembly of the first embodiment, the second lens element E2 to the sixth lens element E6 can be moved along the optical axis relative to the image sensor IS to focus according to the variation of the object distance, but are not limited thereto. For example, one, two, three, or all of the six lens elements can be moved along the optical axis relative to the image sensor IS as needed.

[0095] According to the imaging optical lens assembly, when an Abbe number of the second lens element E2 is V2 and an Abbe number of the third lens element E3 is V3, the following condition is satisfied in the first state: V2 / V3 = 2.16; in the second state, the following condition is satisfied: V2 / V3 = 2.16.

[0096] According to the imaging optical lens assembly, when an axial distance between the third lens element E3 and the fourth lens element E4 is T34, an axial distance between the fourth lens element E4 and the fifth lens element E5 is T45, and an axial distance between the fifth lens element E5 and the sixth lens element E6 is T56, the following condition is satisfied in the 1st state: (T34+T45) / T56 = 0.54; the following condition is satisfied in the 2nd state: (T34+T45) / T56 = 0.54. According to the first embodiment, the axial distance between two adjacent lens elements is the distance between the two adjacent surfaces of the two adjacent lens elements on the optical axis.

[0097] According to the imaging optical lens assembly, when the central thickness of the third lens element E3 is CT3 and the central thickness of the fourth lens element E4 is CT4, the following condition is satisfied in the 1st state: CT4 / CT3 = 1.16; the following condition is satisfied in the 2nd state: CT4 / CT3 = 1.16.

[0098] According to the imaging optical lens assembly, when an axial distance between the object-side surface of the first lens element E1 and the image-side surface of the second lens element E2 of the imaging optical lens assembly is Dr1r4 and a central thickness of the third lens element E3 is CT3, the following condition is satisfied in the 1st state: Dr1r4 / CT3 = 17.18; the following condition is satisfied in the 2nd state: Dr1r4 / CT3 = 16.50. Fig. 13, which corresponds to the folded light path, Dr1r4 is also the sum of the cross-sectional distance Dr1r4_1 and the cross-sectional distance Dr1r4_2.

[0099] When the axial distance between the object-side surface of the first lens element E1 and the image-side surface of the second lens element E2 of the imaging optical lens assembly is Dr1r4 and an axial distance between the object-side surface of the third lens element E3 and the image-side surface of the sixth lens element E6 of the imaging optical lens assembly is Dr5r12 (in Fig. 13), according to the imaging optical lens assembly, the following condition is satisfied in the 1st state: Dr1r4 / Dr5r12 = 1.84; the following condition is satisfied in the 2nd state: Dr1r4 / Dr5r12 = 1.77.

[0100] According to the imaging optical lens assembly, when a radius of curvature of the object-side surface of the third lens element E3 is R5 and a radius of curvature of the image-side surface of the third lens element E3 is R6, the following condition is satisfied in the 1st state: |R6 / R5| = 0.06; the following condition is satisfied in the 2nd state: |R6 / R5| = 0.06.

[0101] According to the imaging optical lens assembly, when the radius of curvature of the object-side surface of the fourth lens element E4 is R7 and the focal length of the fourth lens element E4 is f4, the following condition is satisfied in the 1st state: R7 / |f4| = 0.12; and the following condition is satisfied in the 2nd state: R7 / |f4| = 0.12.

[0102] According to the imaging optical lens assembly, when the radius of curvature of the object-side surface of the fourth lens element E4 is R7 and the radius of curvature of the image-side surface of the fourth lens element E4 is R8, the following condition is satisfied in the 1st state: R8 / R7 = 1.16; the following condition is satisfied in the 2nd state: R8 / R7 = 1.16.

[0103] According to the imaging optical lens assembly, when the focal length of the imaging optical lens assembly is f, and a focal length of the sixth lens element E6 is f6, the following condition is satisfied in the 1st state: |f / f6| = 0.07; the following condition is satisfied in the 2nd state: |f / f6|=0.07.

[0104] According to the imaging optical lens assembly, when the focal length of the imaging optical lens assembly is f and the radius of curvature of the object-side surface of the third lens element E3 is R5, the following condition is satisfied in the 1st state: |f / R5| = 0.33; the following condition is satisfied in the 2nd state: |f / R5| = 0.32.

[0105] According to the imaging optical lens assembly, when the focal length of the imaging optical lens assembly is f and the radius of curvature of the image-side surface of the third lens element E3 is R6, the following condition is satisfied in the 1st state: f / R6 = 5.46; the following condition is satisfied in the 2nd state: f / R6 = 5.44.

[0106] According to the imaging optical lens assembly, when the focal length of the imaging optical lens assembly is f and the radius of curvature of the image-side surface of the fourth lens element E4 is R8, the following condition is satisfied in the 1st state: f / R8 = 3.15; the following condition is satisfied in the 2nd state: f / R8 = 3.14.

[0107] According to the imaging optical lens assembly, when a focal length of the first lens element E1 is f1 and a focal length of the third lens element E3 is f3, the following condition is satisfied in the 1st state: f1 / f3 = -13.04; the following condition is satisfied in the 2nd state: f1 / f3 = -13.04.

[0108] According to the imaging optical lens assembly, when a focal length of the second lens element E2 is f2 and a radius of curvature of the object-side surface of the second lens element E2 is R3, the following condition is satisfied in the 1st state: f2 / R3 = 1.54; the following condition is satisfied in the 2nd state: f2 / R3 = 1.54.

[0109] According to the imaging optical lens assembly, when a focal length of the fifth lens element E5 is f5 and a central thickness of the fifth lens element E5 is CT5, the following condition is satisfied in the 1st state: f5 / CT5 = 51.75; the following condition is satisfied in the 2nd state: f5 / CT5 = 51.75.

[0110] According to the imaging optical lens assembly, when the focal length of the third lens element E3 is f3 and the focal length of the fifth lens element E5 is f5, the following condition is satisfied in the 1st state: f5 / f3 = -8.08; the following condition is satisfied in the 2nd state: f5 / f3 = -8.08.

[0111] In Fig. 15B, the imaging optical lens assembly according to the first embodiment satisfies the following condition in the first state: Y21 / ImgH = 0.78 when a maximum distance between an optical effective area E21 of the object-side surface of the second lens element E2 and the optical axis is Y21, and a maximum image height of the imaging optical lens assembly is ImgH; and the following condition is satisfied in the second state: Y21 / ImgH = 0.78.

[0112] According to the imaging optical lens assembly, when a maximum distance between an optical effective area E21 of the object-side surface of the second lens element E2 and the optical axis is Y21, and a maximum distance between an optical effective area of ​​the image-side surface of the sixth lens element E6 and the optical axis is Y62, the following condition is satisfied: Y21 / Y62 = 1.29; the following condition is satisfied in the 2nd state: Y21 / Y62 = 1.29. <2nd embodiment>

[0113] Fig. 3 is a schematic view of an imaging device 2 in the 1st state according to the 2nd embodiment of the present disclosure. Fig. 4A shows spherical aberration curves, astigmatic field curves, and a distortion curve of the imaging device 2 in the 1st state according to the 2nd embodiment. Fig.4B shows spherical aberration curves, astigmatic field curves, and a distortion curve of the imaging device 2 in the second state according to the second embodiment. Fig.3, the imaging device 2 includes an imaging optical lens assembly (the reference numeral is omitted) and an image sensor LS. The imaging optical lens assembly includes, in order from an object side to an image side along an optical path, a first lens element E1, a light path folding element E8, a diaphragm S1, a second lens element E2, a third lens element E3, a fourth lens element E4, a fifth lens element E5, a diaphragm S2, a sixth lens element E6, a diaphragm S3, a filter E7, and an image surface IMG, with the image sensor IS disposed on the image surface IMG of the imaging optical lens assembly. The imaging optical lens assembly includes six lens elements (E1, E2, E3, E4, E5, E6) without one or more additional lens elements interposed between the first lens element E1 and the sixth lens element E6.

[0114] The first lens element E1 with positive refractive power has an object-side surface that is convex in a paraxial region thereof and an image-side surface that is concave in a paraxial region. The first lens element E1 is made of plastic and has an object-side surface and an image-side surface, both of which are aspherical.

[0115] The second lens element E2 with positive refractive power has an object-side surface that is convex in a paraxial region thereof and an image-side surface that is convex in a paraxial region thereof. The second lens element E2 is made of plastic and has the object-side surface and the image-side surface, both of which are aspherical. Furthermore, the second lens element E2 includes at least one bending point in an optically effective area thereof.

[0116] The third lens element E3 with negative refractive power has an object-side surface that is concave in a paraxial region thereof and an image-side surface that is concave in a paraxial region thereof. The third lens element E3 is made of plastic and has the object-side surface and the image-side surface, both of which are aspherical. Furthermore, the third lens element E3 includes at least one bending point in an optically effective area thereof.

[0117] The fourth lens element E4 with positive refractive power has an object-side surface that is convex in a paraxial region thereof and an image-side surface that is concave in a paraxial region thereof. The fourth lens element E4 is made of plastic and has the object-side surface and the image-side surface, both of which are aspherical. Furthermore, the fourth lens element E4 includes at least one bending point in an optically effective area thereof.

[0118] The fifth lens element E5 with positive refractive power has an object-side surface that is convex in a paraxial region thereof and an image-side surface that is convex in a paraxial region thereof. The lens element E5 is made of plastic and has the object-side surface and the image-side surface, both of which are aspherical. Furthermore, the fifth lens element E5 includes at least one bending point in an optically effective area thereof.

[0119] The sixth lens element E6 with negative refractive power has an object-side surface that is convex in a paraxial region thereof and an image-side surface that is concave in a paraxial region thereof. The sixth lens element E6 is made of plastic and has the object-side surface and the image-side surface, both of which are aspherical. Furthermore, the sixth lens element E6 includes at least one bending point in an optically effective area thereof.

[0120] The light path folding element E8 is arranged between the first lens element E1 and the second lens element E2 along the optical axis. The light path folding element E8 is a prism made of glass material. The light path folding element E8 has a reflective surface and is rotatable relative to the image sensor IS.

[0121] The filter E7 is made of glass material, which is arranged between the sixth lens element E6 and the image surface IMG, and does not affect the focal length of the imaging optical lens assembly.

[0122] The imaging optical lens assembly may include at least one reflective surface located between the object-side surface of the first lens element E1 and the object-side surface of the second lens element E2 along the optical axis. This reflective surface may be similar to the reflective surface in the first embodiment and will not be described again herein. According to the second embodiment, the reflective surface is disposed on the light path folding element E8.

[0123] The reflective surface may be rotatable relative to the image sensor IS (such as roll, pitch, or yaw movements, etc.), which can compensate for the relative positional variation between the image and the image sensor IS, and the rotation method can be adjusted as needed. For example, the first lens element E1 may be moved together with the light path folding element E8 to rotate relative to the image sensor IS, or the light path folding element E8 may be the only one rotated relative to the image sensor IS, and the present disclosure is not limited thereto.

[0124] The optically effective area of ​​each surface of each lens element may be non-circular in each state, which may be similar to the first embodiment and will not be repeated here. According to the second embodiment, the optically effective area of ​​the object-side surface of the second lens element E2 is non-circular in both the first state and the second state.

[0125] The optical effective area of ​​each aperture of each lens element may be non-circular in each state, which may be similar to the first embodiment and will not be repeated here. According to the second embodiment, the optical effective area of ​​the aperture S1 is non-circular in both the first state and the second state.

[0126] The detailed optical data of the 2nd embodiment are shown below in Table 2A and the data of the aspherical surface are shown in Table 2B. Table 2A - 2nd embodiment Surface # radius of curvature thickness material index Abbe number Focal length 0 object plan D0 1 Lens 1 10,9353 ASP 0,750 plastic 1,545 56,1 65,20 2 15,4156 ASP 1,818 3 prism plan 6,600 Glass 1,785 25,7 - 4 plan D4 5 aperture plan -0,793 6 Lens 2 5,3263 ASP 2,216 plastic 1,545 56,1 8,66 7 -35,1961 ASP 0,203 8 Lens 3 -200,8032 ASP 0,723 plastic 1,615 25,3 -5,28 9 3,3078 ASP 0,387 10 Lens 4 3,9569 ASP 0,695 plastic 1,566 37,4 16,38 11 6,4641 ASP 0,787 12 Lens 5 31,5147 ASP 0,984 plastic 1,697 16,3 21,73 13 -28,7963 ASP 0,072 14 aperture plan 2,434 15 Lens 6 5,6126 ASP 0,731 plastic 1,544 56,0 -35,98 16 4,1617 ASP 0,369 17 aperture plan D17 18 filter plan 0,110 Glass 1,517 64,2 - 19 plan 1,000 20 Picture plan - The reference wavelength is 587.6 nm (d-line). The prism has a reflective surface. The maximum distance between the optically effective area of ​​surface 5 (aperture S1) and the optical axis is 3.122 mm. The maximum distance between the optically effective area of ​​surface 14 (aperture S2) and the optical axis is 2.366 mm. The maximum distance between the optically effective area of ​​surface 17 (aperture S3) and the optical axis is 2,440 mm. Table 2B - Aspherical coefficients surface 1 2 6 7 # k = -9,05967E-02 8,67083E-01 3,97755E-02 0,00000E+00 A4 = -2,1983271E-04 -3,1544618E-04 -1,5231760E-03 -3,4264050E-03 A6 = 2,9436959E-05 3,9026856E-05 1,0960050E-04 -6,0484351 E-04 A8 = -3,3022212E-06 -4,3631771 E-06 -1,8793960E-05 3,8520132E-04 A10 = 2,8511281E-07 3,8969914E-07 1,8361996E-06 -2,7029967E-05 A12 = -1,5749110E-08 -2,3236154E-08 -9,6137328E-08 -1,6561690E-05 A14 = 4,8236494E-10 7,9327155E-10 -8,6772264E-09 4,5137157E-06 A16 = -7,3165849E-12 -1,3909165E-11 4,1773116E-10 -5,0888740E-07 A18 = 4,0876885E-14 9,6122915E-14 2,8254307E-08 A20 = -6,3779495E-10 Surface # 8 9 10 11 k = 0,00000E+00 4,56199E-02 -7,05818E-02 3,15266E-01 A4 = 2,9726828E-03 6,0939267E-03 -3,6640463E-03 -3,4692803E-03 A6 = -7,0647149E-03 -1,5140387E-02 -7,3597494E-03 -3,4158054E-03 A8 = 3,1722319E-03 7,0802805E-03 2,7919479E-03 1,6168648E-03 A10 = -7,3446910E-04 -1,7092171E-03 4, 8943310E-04 6,4596433E-04 A12 = 9,2186581 E-05 1,6113403E-04 -6,4340672E-04 -7,3006158E-04 A14 = -5,0731164E-06 2,5904393E-05 2,3152652E-04 2,9045172E-04 A16 = -1,0402104E-07 -1,0790925E-05 -4,6597499E-05 -6,5249004E-05 A18 = 2,7049690E-08 1,5785599E-06 5,5687592E-06 8,6311225E-06 A20 = -9,8119324E-10 -1,1200921 E-07 -3,6620804E-07 -6,2543010E-07 A22 = 3,0884617E-09 1,0106192E-08 1,9116602E-08 Surface # 12 13 15 16 k = 0,00000E+00 0,00000E+00 0,00000E+00 0,00000E+00 A4 = 7,3365366E-03 5,2989064E-03 -1,2317147E-02 -1,4747778E-02 A6 = -2,2682060E-03 -9,8219557E-04 8,3033371E-05 3,3977248E-04 A8 = 1,2515115E-03 5,0462580E-04 1,4166798E-04 1,3251516E-04 A10 = -4,4033268E-04 -1,8177574E-04 -4,1618546E-05 -4,4928037E-05 A12 = 9,6154014E-05 4,0090552E-05 7,5979525E-06 7,8459978E-06 A14 = -1,2367011E-05 -4,5928625E-06 -7,1258152E-07 -7,4644339E-07 A16 = 8,4998703E-07 2,1973973E-07 1,8566279E-08 2,9545683E-08 A18 = -2,3546593E-08 9,6045572E-10

[0127] According to Table 2A, the values ​​of f, Fno, HFOV, D0, D4 and D17 in the 1st state and in the 2nd state of the imaging optical lens assembly according to the 2nd embodiment are shown in Table 2C. Table 2C - 2nd embodiment Condition 1. 2. f (mm) 19,50 19,38 Fno 2,69 2,82 HFOV (degree) 11,5 11,1 D0 infinity 700,000 D4 2,152 1,539 D17 5,675 6,288

[0128] According to the second embodiment, the second lens element E2 to the sixth lens element E6 can be moved along the optical axis relative to the image sensor IS to focus according to the variation of the object distance, but are not limited thereto. They may be similar to the first embodiment and will not be repeated here.

[0129] In Embodiment 2, the equation for the aspherical surface profiles of the aforementioned lens elements is the same as the equation of Embodiment 1. Also, the definitions of these parameters shown in the following table are the same as in Embodiment 1 with the corresponding values ​​for Embodiment 2, so explanation thereof will not be provided again.

[0130] In addition, these parameters from Table 2A, Table 2B and Table 2C can be calculated as the following values ​​and satisfy the following conditions in Table 2D: Table 2D - 2nd embodiment 1. Condition 2nd state 1. Condition 2nd state V2 / V3 2,21 2,21 |f / R5| 0,10 0,10 (T34+T45) / T56 0,47 0,47 f / R6 5,90 5,86 CT4 / CT3 0,96 0,96 f / R8 3,02 3,00 Dr1 r4 / CT3 17,63 16,78 f1 / f3 -12,34 -12,34 Dr1r4 / Dr5r12 1,87 1,78 f2 / R3 1,63 1,63 |R6 / R5| 0,02 0,02 f5 / CT5 22,08 22,08 R7 / |f4| 0,24 0,24 f5 / f3 -4,11 -4,11 R8 / R7 1,63 1,63 Y21 / ImgH 0,77 0,77 |f / f6| 0,54 0,54 Y21 / Y62 1,28 1,28 <3rd embodiment>

[0131] Fig. 5 is a schematic view of an imaging device 3 in the 1st state according to the 3rd embodiment of the present disclosure. Fig.6A shows spherical aberration curves, astigmatic field curves, and a distortion curve of the imaging device 3 in the 1st state according to the 3rd embodiment. Fig. 6B shows spherical aberration curves, astigmatic field curves, and a distortion curve of the imaging device 3 in the second state according to the third embodiment. Fig.5, the imaging device 3 includes an imaging optical lens assembly (the reference numeral is omitted) and an image sensor LS. The imaging optical lens assembly includes, in order from an object side to an image side along an optical path, a first lens element E1, a light path folding element E8, a diaphragm S1, a second lens element E2, a third lens element E3, a fourth lens element E4, a fifth lens element E5, a diaphragm S2, a sixth lens element E6, a diaphragm S3, a filter E7, and an image surface IMG, with the image sensor IS disposed on the image surface IMG of the imaging optical lens assembly. The imaging optical lens assembly includes six lens elements (E1, E2, E3, E4, E5, E6) without one or more additional lens elements interposed between the first lens element E1 and the sixth lens element E6.

[0132] The first lens element E1 with positive refractive power has an object-side surface that is convex in a paraxial region thereof and an image-side surface that is concave in a paraxial region. The first lens element E1 is made of plastic and has an object-side surface and an image-side surface, both of which are aspherical.

[0133] The second lens element E2 with positive refractive power has an object-side surface that is convex in a paraxial region thereof and an image-side surface that is convex in a paraxial region thereof. The second lens element E2 is made of plastic and has the object-side surface and the image-side surface, both of which are aspherical. Furthermore, the second lens element E2 includes at least one bending point in an optically effective area thereof.

[0134] The third lens element E3 with negative refractive power has an object-side surface that is convex in a paraxial region thereof and an image-side surface that is concave in a paraxial region thereof. The third lens element E3 is made of plastic and has the object-side surface and the image-side surface, both of which are aspherical. Furthermore, the third lens element E3 includes at least one bending point in an optically effective area thereof.

[0135] The fourth lens element E4 with negative refractive power has an object-side surface that is convex in a paraxial region thereof and an image-side surface that is concave in a paraxial region thereof. The fourth lens element E4 is made of plastic and has the object-side surface and the image-side surface, both of which are aspherical. Furthermore, the fourth lens element E4 includes at least one bending point in an optically effective area thereof.

[0136] The fifth lens element E5 with positive refractive power has an object-side surface that is convex in a paraxial region thereof and an image-side surface that is convex in a paraxial region thereof. The lens element E5 is made of plastic and has the object-side surface and the image-side surface, both of which are aspherical. Furthermore, the fifth lens element E5 includes at least one bending point in an optically effective area thereof.

[0137] The sixth lens element E6 with negative refractive power has an object-side surface that is convex in a paraxial region thereof and an image-side surface that is concave in a paraxial region thereof. The sixth lens element E6 is made of plastic and has the object-side surface and the image-side surface, both of which are aspherical. Furthermore, the sixth lens element E6 includes at least one bending point in an optically effective area thereof.

[0138] The light path folding element E8 is arranged between the first lens element E1 and the second lens element E2 along the optical axis. The light path folding element E8 is a prism made of glass material. The light path folding element E8 has a reflective surface and is rotatable relative to the image sensor IS.

[0139] The filter E7 is made of glass material, which is arranged between the sixth lens element E6 and the image surface IMG, and does not affect the focal length of the imaging optical lens assembly.

[0140] The imaging optical lens assembly may include at least one reflective surface located between the object-side surface of the first lens element E1 and the object-side surface of the second lens element E2 along the optical axis. This reflective surface may be similar to the reflective surface in the first embodiment and will not be described again herein. According to the third embodiment, the reflective surface is disposed on the light path folding element E8.

[0141] The reflective surface may be rotatable relative to the image sensor IS (such as roll, pitch, or yaw movements, etc.), which can compensate for the relative positional variation between the image and the image sensor IS, and the rotation method can be adjusted as needed. For example, the first lens element E1 may be moved together with the light path folding element E8 to rotate relative to the image sensor IS, or the light path folding element E8 may be the only one rotated relative to the image sensor IS, and the present disclosure is not limited thereto.

[0142] The optically effective area of ​​each surface of each lens element may be non-circular in each state, which may be similar to the first embodiment and will not be repeated here. According to the third embodiment, the optically effective area of ​​the object-side surface of the second lens element E2 is non-circular in both the first state and the second state.

[0143] The optical effective area of ​​each aperture of each lens element may be non-circular in each state, which may be similar to the first embodiment and will not be repeated here. According to the third embodiment, the optical effective area of ​​the aperture S1 is non-circular in both the first state and the second state.

[0144] The detailed optical data of the 3rd embodiment are shown below in Table 3A and the data of the aspherical surface are shown in Table 3B. Table 3A - 3rd embodiment Surface # radius of curvature thickness material index Abbe number Focal length 0 object plan D0 1 Lens 1 10,6647 ASP 0,753 plastic 1,545 56,1 65,04 2 14,8748 ASP 2,001 3 prism plan 6,600 Glass 1,785 25,7 - 4 plan D4 5 aperture plan -0,793 6 Lens 2 4,8450 ASP 2,171 plastic 1,545 56,1 7,74 7 -27,5309 ASP 0,100 8 Lens 3 45,9190 ASP 0,531 plastic 1,615 25,4 -6,22 9 3,5135 ASP 0,721 10 Lens 4 8,6377 ASP 0,360 plastic 1,587 28,3 -992,42 11 8,3803 ASP 1,354 12 Lens 5 19,9461 ASP 1,200 plastic 1,669 19,5 15,09 13 -19,9538 ASP 0,022 14 aperture plan 1,687 15 Lens 6 5,6222 ASP 1,003 plastic 1,669 19,5 -31,92 16 4,1324 ASP 0,457 17 aperture plan D17 18 filter plan 0,210 Glass 1,517 64,2 - 19 plan 1,000 20 Picture plan - The reference wavelength is 587.6 nm (d-line). The prism has a reflective surface. The maximum distance between the optically effective area of ​​surface 5 (aperture S1) and the optical axis is 3,080 mm. The maximum distance between the optically effective area of ​​surface 14 (aperture S2) and the optical axis is 2.366 mm. The maximum distance between the optically effective area of ​​surface 17 (aperture S3) and the optical axis is 2,450 mm. Table 3B - Aspherical coefficients Surface # 1 2 6 7 k = -2,14695E-01 1,90828E-01 -3,00074E-02 0,00000E+00 A4 = -2,6925902E-04 -3,7913081E-04 -1,6009864E-03 -4,8270719E-03 A6 = 2,5545348E-05 3,6823807E-05 9,0799336E-05 1,2625045E-03 A8 = -1,7699951 E-06 -2,7249996E-06 -2,9348488E-06 -2,5020489E-04 A10 = 1,0910360E-07 1,7921328E-07 -2,8009734E-06 6,8309132E-05 A12 = -4,9076352E-09 -9,0777900E-09 5,6056483E-07 -2,0736010E-05 A14 = 1,1419319E-10 2,6623470E-10 -5,7910360E-08 3,8245952E-06 A16 = -1,0365608E-12 -3,8917313E-12 1,8072092E-09 -3,9144195E-07 A18 = 1,3669583E-16 2,1303475E-14 2,0913803E-08 A20 = -4,5853773E-10 Surface # 8 9 10 11 k = 0,00000E+00 4,13727E-02 -9,95034E-01 1,29571E-01 A4 = 2,4091026E-04 2,8609620E-03 -6,6071454E-03 -3,8540538E-03 A6 = -4,3830412E-03 -9,.2434572E-03 -3,9477137E-03 -2,9850117E-03 A8 = 2,0004168E-03 3,6153924E-03 1,7399663E-03 2,1903641E-03 A10 = -4,5396239E-04 -8,0385167E-04 1,0264856E-04 -4,3701265E-04 A12 = 5,0943333E-05 1,1973149E-04 -1,5501340E-04 6,6674353E-05 A14 = -1,2726862E-06 -1,8544267E-05 2,2270917E-05 -3,2216354E-05 A16 = -2,9383340E-07 3,3888226E-06 1,8630398E-06 1,1000794E-05 A18 = 2,9016930E-08 -4,3305742E-07 -7,8858450E-07 -1,8409006E-06 A20 = -8,2262560E-10 2,9630287E-08 7,7621725E-08 1,5064145E-07 A22 = -8,8239977E-10 -2,7159965E-09 -4,9048360E-09 Surface # 12 13 15 16 k = 0,00000E+00 0,00000E+00 0,00000E+00 0,00000E+00 A4 = 6,1151396E-03 2,4616285E-03 -1,0026777E-02 -1,2241663E-02 A6 = -7,6089337E-04 -3,2654254E-04 1,4171030E-04 3,6876283E-04 A8 = 2,4019594E-04 1,4290889E-04 5,2067391E-05 7,0018333E-05 A10 = -5,4442042E-05 -3,5977393E-05 -3,4525933E-06 -2,3083066E-05 A12 = 7,2687127E-06 6,1614406E-06 -1,4483430E-06 3,7471031 E-06 A14 = -4,3253473E-07 -5,5875854E-07 4,7886010E-07 -3,4093387E-07 A16 = -3,1918202E-10 2,1906574E-08 -5,9381777E-08 1,2937170E-08 A18 = 8,6708926E-10 2,6985431E-09

[0145] According to Table 3A, the values ​​of f, Fno, HFOV, D0, D4 and D17 in the 1st state and in the 2nd state of the imaging optical lens assembly according to the 3rd embodiment are shown in Table 3C. Table 3C - 3rd embodiment Condition 1. 2. f (mm) 19,12 19,04 Fno 2,66 2,75 HFOV (degree) 11,7 11,5 D0 infinity 1000,000 D4 2,043 1,635 D17 5,838 6,246

[0146] According to the third embodiment, the second lens element E2 to the sixth lens element E6 can be moved along the optical axis relative to the image sensor IS to focus according to the variation of the object distance, but are not limited thereto. They may be similar to the first embodiment and will not be repeated here.

[0147] In Embodiment 3, the equation for the aspherical surface profiles of the aforementioned lens elements is the same as the equation of Embodiment 1. Also, the definitions of these parameters shown in the following table are the same as in Embodiment 1 with the corresponding values ​​for Embodiment 3, so explanation thereof will not be provided again.

[0148] In addition, these parameters from Table 3A, Table 3B and Table 3C can be calculated as the following values ​​and satisfy the following conditions in Table 3D: Table 3D - 3rd embodiment 1. Condition 2nd state 1. Condition 2nd state V2 / V3 2,21 2,21 |f / R5| 0,42 0,41 (T34+T45) / T56 1,21 1,21 f / R6 5,44 5,42 CT4 / CT3 0,68 0,68 f / R8 2,28 2,27 Dr1r4 / CT3 24,06 23,29 f1 / f3 -10,46 -10,46 Dr1r4 / Dr5r12 1,86 1,80 f2 / R3 1,60 1,60 |R6 / R5| 0,08 0,08 f5 / CT5 12,58 12,58 R7 / |f4| 0,01 0,01 f5 / f3 -2,43 -2,43 R8 / R7 0,97 0,97 Y21 / ImgH 0,76 0,76 |f / f6| 0,60 0,60 Y21 / Y62 1,26 1,26 <4th Embodiment>

[0149] Fig. 7 is a schematic view of an imaging device 4 in the 1st state according to the 4th embodiment of the present disclosure. Fig.8A shows spherical aberration curves, astigmatic field curves, and a distortion curve of the imaging device 4 in the 1st state according to the 4th embodiment. Fig. Fig. 8B shows spherical aberration curves, astigmatic field curves, and a distortion curve of the imaging device 4 in the 2nd state according to the 4th embodiment. In Fig.7, the imaging device 4 includes an imaging optical lens assembly (the reference numeral is omitted) and an image sensor LS. The imaging optical lens assembly includes, in order from an object side to an image side along an optical path, a first lens element E1, a light path folding element E8, a diaphragm S1, a second lens element E2, a third lens element E3, a fourth lens element E4, a fifth lens element E5, a diaphragm S2, a sixth lens element E6, a diaphragm S3, a filter E7, and an image surface IMG, with the image sensor IS disposed on the image surface IMG of the imaging optical lens assembly. The imaging optical lens assembly includes six lens elements (E1, E2, E3, E4, E5, E6) without one or more additional lens elements interposed between the first lens element E1 and the sixth lens element E6.

[0150] The first lens element E1 with positive refractive power has an object-side surface that is convex in a paraxial region thereof and an image-side surface that is concave in a paraxial region. The first lens element E1 is made of plastic and has an object-side surface and an image-side surface, both of which are aspherical.

[0151] The second lens element E2 with positive refractive power has an object-side surface that is convex in a paraxial region thereof and an image-side surface that is convex in a paraxial region thereof. The second lens element E2 is made of plastic and has the object-side surface and the image-side surface, both of which are aspherical. Furthermore, the second lens element E2 includes at least one bending point in an optically effective area thereof.

[0152] The third lens element E3 with negative refractive power has an object-side surface that is convex in a paraxial region thereof and an image-side surface that is concave in a paraxial region thereof. The third lens element E3 is made of plastic and has the object-side surface and the image-side surface, both of which are aspherical. Furthermore, the third lens element E3 includes at least one bending point in an optically effective area thereof.

[0153] The fourth lens element E4 with positive refractive power has an object-side surface that is convex in a paraxial region thereof and an image-side surface that is concave in a paraxial region thereof. The fourth lens element E4 is made of plastic and has the object-side surface and the image-side surface, both of which are aspherical. Furthermore, the fourth lens element E4 includes at least one bending point in an optically effective area thereof.

[0154] The fifth lens element E5 with positive refractive power has an object-side surface that is convex in a paraxial region thereof and an image-side surface that is concave in a paraxial region thereof. The lens element E5 is made of plastic and has both the object-side surface and the image-side surface aspherical.

[0155] The sixth lens element E6 with negative refractive power has an object-side surface that is concave in a paraxial region thereof and an image-side surface that is convex in a paraxial region thereof. The sixth lens element E6 is made of plastic and has both the object-side surface and the image-side surface aspherical.

[0156] The light path folding element E8 is arranged between the first lens element E1 and the second lens element E2 along the optical axis. The light path folding element E8 is a prism made of glass material. The light path folding element E8 has a reflective surface and is rotatable relative to the image sensor IS.

[0157] The filter E7 is made of glass material arranged between the sixth lens element E6 and the image surface IMG and does not affect the focal length of the imaging optical lens assembly.

[0158] The imaging optical lens assembly may include at least one reflective surface located between the object-side surface of the first lens element E1 and the object-side surface of the second lens element E2 along the optical axis. This reflective surface may be similar to the reflective surface in the first embodiment and will not be described again herein. According to the fourth embodiment, the reflective surface is disposed on the light path folding element E8.

[0159] The reflective surface may be rotatable relative to the image sensor IS (such as roll, pitch, or yaw movements, etc.), which can compensate for the relative positional variation between the image and the image sensor IS, and the rotation method can be adjusted as needed. For example, the first lens element E1 may be moved together with the light path folding element E8 to rotate relative to the image sensor IS, or the light path folding element E8 may be the only one rotated relative to the image sensor IS, and the present disclosure is not limited thereto.

[0160] The optically effective area of ​​each surface of each lens element may be non-circular in each state, which may be similar to the first embodiment and will not be repeated here. According to the fourth embodiment, the optically effective area of ​​the object-side surface of the second lens element E2 is non-circular in both the first state and the second state.

[0161] The optical effective area of ​​each aperture of each lens element may be non-circular in each state, which may be similar to the first embodiment and will not be repeated here. According to the fourth embodiment, the optical effective area of ​​the aperture S1 is non-circular in both the first state and the second state.

[0162] The detailed optical data of the 4th embodiment are shown below in Table 4A and the data of the aspherical surface are shown in Table 4B. Table 4A - 4th embodiment Surface # radius of curvature thickness material index Abbe number Focal length 0 object plan D0 1 Lens 1 12,1233 ASP 0,910 plastic 1,545 56,1 65,58 2 17,8613 ASP 1,890 3 prism plan 6,600 Glass 1,785 25,7 - 4 plan D4 5 aperture plan -0,795 6 Lens 2 5,2477 ASP 2,162 plastic 1,545 56,1 8,86 7 -51,8218 ASP 0,119 8 Lens 3 46,8191 ASP 0,949 plastic 1,587 28,3 -5,77 9 3,1339 ASP 0,276 10 Lens 4 3,5851 ASP 1,028 plastic 1,544 56,0 16,31 11 5,4075 ASP 1,787 12 Lens 5 12,8956 ASP 1,200 plastic 1,686 18,4 19,98 13 208,6376 ASP 0,126 14 aperture plan 1,532 15 Lens 6 -11,1682 ASP 0,663 plastic 1,544 56,0 -21,80 16 -195,7713 ASP -0,249 17 aperture plan D17 18 filter plan 0,110 Glass 1,517 64,2 - 19 plan 1,000 20 Picture plan - The reference wavelength is 587.6 nm (d-line). The prism has a reflective surface. The maximum distance between the optical effective area of ​​the Surface 5 (aperture S1) and the optical axis is 3.103 mm. The maximum distance between the optically effective area of ​​surface 14 (aperture S2) and the optical axis is 2.366 mm. The maximum distance between the optically effective area of ​​surface 17 (aperture S3) and the optical axis is 2,450 mm. Table 4B - Aspherical coefficients Surface # 1 2 6 7 k = -1,98839E-01 3,47991E-01 2,19442E-02 0,00000E+00 A4 = -2,8589201E-04 -3,9578216E-04 -1,6158652E-03 -3,3842878E-03 A6 = 2,0795603E-05 2,9770228E-05 1,2708361E-04 -1,4819155E-03 A8 = -1,5538066E-06 -2,1910897E-06 -2,4036544E-05 1,0295436E-03 A10 = 1,1352605E-07 1,5966704E-07 3,6115825E-06 -2,5282439E-04 A12 = -5,4664814E-09 -8,1809735E-09 -4,1508674E-07 2,9883334E-05 A14 = 1,4920813E-10 2,4602904E-10 1,9185665E-08 -1,3700681E-06 A16 = -2,0468743E-12 -3,8531932E-12 -5,4562758E-10 -5,5537527E-08 A18 = 1,0155843E-14 2,3533172E-14 8,6396885E-09 A20 = -2,7014360E-10 Surface # 8 9 10 11 k = 0,00000E+00 1,52130E-02 -7,59697E-02 1,83916E-01 A4 = 2,1853365E-03 2,9492112E-03 -6,9140762E-03 -8,8775193E-03 A6 = -5,6122782E-03 -1,0259600E-02 -2,8797475E-03 2,1497035E-03 A8 = 2,3713710E-03 3,8888178E-03 1,3886584E-03 -3,1339823E-04 A10 = -4,8160280E-04 -8,5303606E-04 -1,7162882E-04 4,7483119E-04 A12 = 4,1097116E-05 1,7754037E-04 5,0466017E-05 -3,2773662E-04 A14 = 1,6991711E-06 -4,7634547E-05 -2,8856707E-05 1,3344740E-04 A16 = -6,7583285E-07 1,0030690E-05 6,8956560E-06 -3,4998057E-05 A18 = 5,4820284E-08 -1,2160274E-06 -7,3939480E-07 5,6197493E-06 A20 = -1,5667600E-09 7,6240609E-08 3,3518190E-08 -4,9563235E-07 A22 = -2,0141038E-09 -4,3373678E-10 1,8256302E-08 Surface # 12 13 15 16 k = 0,00000E+00 0,00000E+00 0,00000E+00 0,00000E+00 A4 = 8,7303283E-04 2,6402635E-03 -7,0766470E-03 -6,9325593E-03 A6 = 7,1284832E-04 4,2546828E-04 1,3666214E-04 1,0141643E-04 A8 = -8,9659964E-05 1,1012767E-05 -1,9451939E-05 7,4226190E-05 A10 = 5,4403305E-05 1,7150372E-06 1,8321986E-05 -3,2126107E-05 A12 = -2,2052271E-05 -3,3930936E-06 -1,4954536E-05 5,2152211 E-06 A14 = 4,1912066E-06 4,8188008E-07 3,8274878E-06 -4,3555598E-07 A16 = -3,9751621E-07 -2,3834591E-08 -4,6488303E-07 1,4571947E-08 A18 = 1,5170507E-08 2,1258359E-08

[0163] According to Table 4A, the values ​​of f, Fno, HFOV, D0, D4 and D17 in the 1st state and in the 2nd state of the imaging optical lens assembly according to the 4th embodiment are shown in Table 4C. Table 4C - 4th embodiment Condition 1. 2. f (mm) 19,60 19,50 Fno 2,67 2,78 HFOV (degree) 11,5 11,1 D0 infinity 900,000 D4 2,809 2,329 D17 5,192 5,672

[0164] According to the fourth embodiment, the second lens element E2 to the sixth lens element E6 can be moved along the optical axis relative to the image sensor IS to focus according to the variation of the object distance, but are not limited thereto. They may be similar to the first embodiment and will not be repeated here.

[0165] In the fourth embodiment, the equation for the aspherical surface profiles of the above-mentioned lens elements is the same as the equation of the first embodiment. The definitions of these parameters shown in the following table are also the same as in the first embodiment with the corresponding values ​​for the fourth embodiment, so an explanation thereof will not be provided again.

[0166] In addition, these parameters from Table 4A, Table 4B and Table 4C can be calculated as the following values ​​and satisfy the following conditions in Table 4D: Table 4D - 4th embodiment 1. Condition 2nd state 1. Condition 2nd state V2 / V3 1,98 1,98 |f / R5| 0,42 0,42 (T34+T45) / T56 1,24 1,24 f / R6 6,25 6,22 CT4 / CT3 1,08 1,08 f / R8 3,62 3,61 Dr1 r4 / CT3 14,31 13,80 f1 / f3 -11,37 -11,37 Dr1 r4 / Dr5r12 1,80 1,73 f2 / R3 1,69 1,69 |R6 / R5| 0,07 0,07 f5 / CT5 16,65 16,65 R7 / |f4| 0,22 0,22 f5 / f3 -3,47 -3,47 R8 / R7 1,51 1,51 Y21 / ImgH 0,77 0,77 |f / f6| 0,90 0,89 Y21 / Y62 1,27 1,27 <5th Embodiment>

[0167] Fig. 9 is a schematic view of an imaging device 5 in the 1st state according to the 5th embodiment of the present disclosure. Fig.10A shows spherical aberration curves, astigmatic field curves, and a distortion curve of the imaging device 5 in the 1st state according to the 5th embodiment. Fig. 10B shows spherical aberration curves, astigmatic field curves, and a distortion curve of the imaging device 5 in the 2nd state according to the 5th embodiment. In Fig.9, the imaging device 5 includes an imaging optical lens assembly (the reference numeral is omitted) and an image sensor LS. The imaging optical lens assembly includes, in order from an object side to an image side along an optical path, a first lens element E1, a light path folding element E8, a diaphragm S1, a second lens element E2, a third lens element E3, a fourth lens element E4, a fifth lens element E5, a diaphragm S2, a sixth lens element E6, a diaphragm S3, a filter E7, and an image surface IMG, with the image sensor IS disposed on the image surface IMG of the imaging optical lens assembly. The imaging optical lens assembly includes six lens elements (E1, E2, E3, E4, E5, E6) without one or more additional lens elements interposed between the first lens element E1 and the sixth lens element E6.

[0168] The first lens element E1 with positive refractive power has an object-side surface that is convex in a paraxial region thereof and an image-side surface that is concave in a paraxial region. The first lens element E1 is made of plastic and has an object-side surface and an image-side surface, both of which are aspherical.

[0169] The second lens element E2 with positive refractive power has an object-side surface that is convex in a paraxial region thereof and an image-side surface that is convex in a paraxial region thereof. The second lens element E2 is made of plastic and has the object-side surface and the image-side surface, both of which are aspherical. Furthermore, the second lens element E2 includes at least one bending point in an optically effective area thereof.

[0170] The third lens element E3 with negative refractive power has an object-side surface that is convex in a paraxial region thereof and an image-side surface that is concave in a paraxial region thereof. The third lens element E3 is made of plastic and has the object-side surface and the image-side surface, both of which are aspherical. Furthermore, the third lens element E3 includes at least one bending point in an optically effective area thereof.

[0171] The fourth lens element E4 with positive refractive power has an object-side surface that is convex in a paraxial region thereof and an image-side surface that is concave in a paraxial region thereof. The fourth lens element E4 is made of plastic and has the object-side surface and the image-side surface, both of which are aspherical. Furthermore, the fourth lens element E4 includes at least one bending point in an optically effective area thereof.

[0172] The fifth lens element E5 with positive refractive power has an object-side surface that is convex in a paraxial region thereof and an image-side surface that is convex in a paraxial region thereof. The lens element E5 is made of plastic and has the object-side surface and the image-side surface, both of which are aspherical. Furthermore, the fifth lens element E5 includes at least one bending point in an optically effective area thereof.

[0173] The sixth lens element E6 with negative refractive power has an object-side surface that is concave in a paraxial region thereof and an image-side surface that is concave in a paraxial region thereof. The sixth lens element E6 is made of plastic and has the object-side surface and the image-side surface, both of which are aspherical. Furthermore, the sixth lens element E6 includes at least one bending point in an optically effective area thereof.

[0174] The light path folding element E8 is arranged between the first lens element E1 and the second lens element E2 along the optical axis. The light path folding element E8 is a prism made of glass material. The light path folding element E8 has a reflective surface and is rotatable relative to the image sensor IS.

[0175] The filter E7 is made of glass material arranged between the sixth lens element E6 and the image surface IMG and does not affect the focal length of the imaging optical lens assembly.

[0176] The imaging optical lens assembly may include at least one reflective surface located between the object-side surface of the first lens element E1 and the object-side surface of the second lens element E2 along the optical axis. This reflective surface may be similar to the reflective surface in the first embodiment and will not be described again herein. According to the fifth embodiment, the reflective surface is disposed on the light path folding element E8.

[0177] The reflective surface may be rotatable relative to the image sensor IS (such as roll, pitch, or yaw movements, etc.), which can compensate for the relative positional variation between the image and the image sensor IS, and the rotation method can be adjusted as needed. For example, the first lens element E1 may be moved together with the light path folding element E8 to rotate relative to the image sensor IS, or the light path folding element E8 may be the only one rotated relative to the image sensor IS, and the present disclosure is not limited thereto.

[0178] The optically effective area of ​​each surface of each lens element may be non-circular in each state, which may be similar to the first embodiment and will not be repeated here. According to the fifth embodiment, the optically effective area of ​​the object-side surface of the second lens element E2 is non-circular in both the first state and the second state.

[0179] The optical effective area of ​​each aperture of each lens element may be non-circular in each state, which may be similar to the first embodiment and will not be repeated here. According to the fifth embodiment, the optical effective area of ​​the aperture S1 is non-circular in both the first state and the second state.

[0180] The detailed optical data of the 5th embodiment are shown below in Table 5A and the data of the aspherical surface are shown in Table 5B. Table 5A - 5th embodiment Surface # radius of curvature thickness material index Abbe number Focal length 0 object plan D0 1 Lens 1 14,8577 ASP 0,849 plastic 1,545 56,1 56,15 2 28,2978 ASP 1,751 3 prism plan 6,600 Glass 1,785 25,7 - 4 plan D4 5 aperture plan -0,789 6 Lens 2 5,0975 ASP 2,356 plastic 1,545 56,1 9,19 7 -234,9722 ASP 0,159 8 Lens 3 60,3116 ASP 0,605 plastic 1,614 25,6 -5,78 9 3,3374 ASP 0,310 10 Lens 4 4,3703 ASP 0,441 plastic 1,544 56,0 24,87 11 6,2262 ASP 1,454 12 Lens 5 21,5655 ASP 0,633 plastic 1,660 20,4 15,55 13 -19,3598 ASP 0,020 14 aperture plan 3,094 15 Lens 6 -22,7499 ASP 0,633 plastic 1,544 56,0 -22,74 16 27,3892 ASP -0,149 17 aperture plan D17 18 filter plan 0,110 Glass 1,517 64,2 - 19 plan 1,000 20 Picture plan - The reference wavelength is 587.6 nm (d-line). The prism has a reflective surface. The maximum distance between the optically effective area of ​​surface 5 (aperture S1) and the optical axis is 3.174 mm. The maximum distance between the optically effective area of ​​surface 14 (aperture S2) and the optical axis is 2.366 mm. The maximum distance between the optically effective area of ​​surface 17 (aperture S3) and the optical axis is 2,440 mm. Table 5B - Aspherical coefficients Surface # 1 2 6 7 k = -1,35196E+00 -6,74800E+00 -1,22843E-03 0,00000E+00 A4 = -3,6356048E-04 -5,0438298E-04 -1,5421973E-03 -3,0489899E-03 A6 = 3,6588015E-05 4,8247229E-05 9,2700228E-06 4,6021865E-04 A8 = -2,3932065E-06 -3,1012487E-06 -1,7865063E-06 -1,1170763E-03 A10 = 1,5944316E-07 1,8907894E-07 1,6005299E-06 7,2676954E-04 A12 = -8,9927341E-09 -1,0254709E-08 -3,5336671E-07 -2,1404152E-04 A14 = 3,0695661 E-1 0 3,5178624E-10 2,3988515E-08 3,4642610E-05 A16 = -5,5760078E-12 -6,4626022E-12 -7,3885730E-10 -3,2243390E-06 A18 = 4,2146998E-14 4,9186565E-14 1,6291143E-07 A20 = -3,4779451E-09 Surface # 8 9 10 11 k = 0,00000E+00 4,18871E-03 3,39493E-03 -5,13377E-04 A4 = -1,8068011E-03 -6,3275154E-03 -6,5349981E-03 -8,8043074E-05 A6 = 1,3085202E-03 -2,2405738E-03 -9,6282337E-03 -8,3120060E-03 A8 = -3,0755555E-03 1,6155795E-03 7,6451962E-03 4,5123416E-03 A10 = 1,8568891E-03 -1,6091649E-03 -3,0456708E-03 -8,2852975E-05 A12 = -5,5509522E-04 1,1351040E-03 9,7673105E-04 -7,2559687E-04 A14 = 9,5183120E-05 -4,5002644E-04 -2,6426420E-04 3,3623774E-04 A16 = -9,5770299E-06 1,0408361 E-04 5,3577481E-05 -7,7687956E-05 A18 = 5,2844463E-07 -1,4170133E-05 -7,2763331E-06 1,0127432E-05 A20 = -1,2388389E-08 1,0596482E-06 5,7877531E-07 -7,0496570E-07 A22 = -3,3709366E-08 -2,0108101E-08 2,0326163E-08 Surface # 12 13 15 16 k = 0,00000E+00 0,00000E+00 0,00000E+00 0,00000E+00 A4 = 8,4450349E-03 7,0137593E-03 -7,8560322E-03 -7,3292725E-03 A6 = -3,2314029E-03 -2,3671677E-03 -5,8769951E-04 -2,4209378E-04 A8 = 1,4389747E-03 9,8095292E-04 1,9855140E-04 1,1561257E-04 A10 = -4,0944290E-04 -2,5057095E-04 -5,9446903E-05 -2,0659777E-05 A12 = 7,7506765E-05 4,0250381 E-05 1,3612313E-05 1,9167836E-06 A14 = -9,4200135E-06 -3,7256629E-06 -2,3386264E-06 -1,2021506E-07 A16 = 6,5469619E-07 1,5147718E-07 2,1730020E-07 4,5077986E-09 A18 = -1,9163494E-08 -8,0546303E-09

[0181] According to Table 5A, the values ​​of f, Fno, HFOV, D0, D4 and D17 in the 1st state and in the 2nd state of the imaging optical lens assembly according to the 5th embodiment are shown in Table 5C. Table 5C - 5th embodiment Condition 1. 2. f (mm) 20,63 20,49 Fno 2,70 2,84 HFOV (degree) 10,9 10,5 D0 infinity 800,000 D4 2,744 2,103 D17 5,732 6,373

[0182] According to the fifth embodiment, the second lens element E2 to the sixth lens element E6 can be moved along the optical axis relative to the image sensor IS to focus according to the variation of the object distance, but are not limited thereto. They may be similar to the first embodiment and will not be repeated here.

[0183] In the 5th embodiment, the equation for the aspherical surface profiles of the above-mentioned lens elements is the same as the equation of the 1st embodiment. Also, the definitions of these parameters shown in the following table are the same as in the 1st embodiment with the corresponding values ​​for the 5th embodiment, so an explanation thereof will not be provided again.

[0184] In addition, these parameters can be calculated from Table 5A, Table 5B and Table 5C as the following values ​​and satisfy the following conditions in Table 5D: Table 5D - 5th embodiment 1. Condition 2nd state 1. Condition 2nd state V2 / V3 2,19 2,19 |f / R5| 0,34 0,34 (T34+T45) / T56 0,57 0,57 f / R6 6,18 6,14 CT4 / CT3 0,73 0,73 f / R8 3,31 3,29 Dr1 r4 / CT3 22,33 21,27 f1 / f3 -9,71 -9,71 Dr1 r4 / Dr5r12 1,88 1,79 f2 / R3 1,80 1,80 |R6 / R5| 0,06 0,06 f5 / CT5 24,57 24,57 R7 / |f4| 0,18 0,18 f5 / f3 -2,69 -2,69 R8 / R7 1,42 1,42 Y21 / ImgH 0,79 0,79 |f / f6| 0,91 0,90 Y21 / Y62 1,30 1,30 <6th Embodiment>

[0185] Fig. 11 is a schematic view of an imaging device 6 in the 1st state according to the 6th embodiment of the present disclosure. Fig.12A shows spherical aberration curves, astigmatic field curves, and a distortion curve of the imaging device 6 in the 1st state according to the 6th embodiment. Fig. 12B shows spherical aberration curves, astigmatic field curves, and a distortion curve of the imaging device 6 in the 2nd state according to the 6th embodiment. In Fig.11, the imaging device 6 includes an imaging optical lens assembly (the reference numeral is omitted) and an image sensor LS. The imaging optical lens assembly includes, in order from an object side to an image side along an optical path, a first lens element E1, a stop S1, a second lens element E2, a third lens element E3, a fourth lens element E4, a fifth lens element E5, a stop S2, a sixth lens element E6, a stop S3, a filter E7, and an image surface IMG, with the image sensor IS disposed on the image surface IMG of the imaging optical lens assembly. The imaging optical lens assembly includes six lens elements (E1, E2, E3, E4, E5, E6) without one or more additional lens elements interposed between the first lens element E1 and the sixth lens element E6.

[0186] The first lens element E1 with positive refractive power has an object-side surface that is convex in a paraxial region thereof and an image-side surface that is flat in a paraxial region. The first lens element E1 is made of a plastic material. Furthermore, the first lens element E1 is a prism with a non-flat surface that is a light path folding element. The first lens element E1 has a reflective surface located between the object-side surface thereof and the image-side surface thereof along an optical axis, and the first lens element E1 is rotatable relative to the image sensor IS.

[0187] The second lens element E2 with positive refractive power has an object-side surface that is convex in a paraxial region thereof and an image-side surface that is concave in a paraxial region thereof. The second lens element E2 is made of plastic and has the object-side surface and the image-side surface, both of which are aspherical. Furthermore, the second lens element E2 includes at least one bending point in an optically effective area thereof.

[0188] The third lens element E3 with negative refractive power has an object-side surface that is convex in a paraxial region thereof and an image-side surface that is concave in a paraxial region thereof. The third lens element E3 is made of plastic and has the object-side surface and the image-side surface, both of which are aspherical. Furthermore, the third lens element E3 includes at least one bending point in an optically effective area thereof.

[0189] The fourth lens element E4 with positive refractive power has an object-side surface that is convex in a paraxial region thereof and an image-side surface that is concave in a paraxial region thereof. The fourth lens element E4 is made of plastic and has the object-side surface and the image-side surface, both of which are aspherical. Furthermore, the fourth lens element E4 includes at least one bending point in an optically effective area thereof.

[0190] The fifth lens element E5 with positive refractive power has an object-side surface that is concave in a paraxial region thereof and an image-side surface that is convex in a paraxial region thereof. The lens element E5 is made of plastic and has the object-side surface and the image-side surface, both of which are aspherical. Furthermore, the fifth lens element E5 includes at least one bending point in an optically effective area thereof.

[0191] The sixth lens element E6 with negative refractive power has an object-side surface that is convex in a paraxial region thereof and an image-side surface that is concave in a paraxial region thereof. The sixth lens element E6 is made of plastic and has the object-side surface and the image-side surface, both of which are aspherical. Furthermore, the sixth lens element E6 includes at least one bending point in an optically effective area thereof.

[0192] The filter E7 is made of glass material arranged between the sixth lens element E6 and the image surface IMG and does not affect the focal length of the imaging optical lens assembly.

[0193] The imaging optical lens assembly may include at least one reflective surface located between the object-side surface of the first lens element E1 and the object-side surface of the second lens element E2 along the optical axis. This reflective surface may be similar to the reflective surface in the first embodiment and will not be described again herein. According to the sixth embodiment, the reflective surface is disposed on the first lens element E1. Fig. 17 is a schematic view of the folded light path of the imaging device 6 according to the 6th embodiment of the present disclosure. In Fig. 17, the light path is folded over the reflecting surface of the first lens element E1, which is the same as the unfolded light path in Fig. 11 can be compared.

[0194] The reflective surface may be rotatable relative to the image sensor IS (such as roll, pitch or yaw movements, etc.), which can compensate for the relative variation in position between the image and the image sensor IS, the rotation method being able to be adapted as needed, and the present invention is not limited thereto.

[0195] The optically effective area of ​​each surface of each lens element may be non-circular in each state, which may be similar to the first embodiment and will not be repeated here. According to the sixth embodiment, the optically effective area of ​​the object-side surface of the second lens element E2 is non-circular in both the first state and the second state.

[0196] The optical effective area of ​​each aperture of each lens element may be non-circular in each state, which may be similar to the first embodiment and will not be repeated here. According to the sixth embodiment, the optical effective area of ​​the aperture S1 is non-circular in both the first state and the second state.

[0197] The detailed optical data of the 6th embodiment are shown below in Table 6A and the data of the aspherical surface are shown in Table 6B. Table 6 A - 6th embodiment Surface # radius of curvature thickness material index Abbe number Focal length 0 object plan D0 1 Lens 1 18,3793 7,800 plastic 1,545 56,1 33,73 2 plan D2 3 aperture plan -0,509 4 Lens 2 6,9104 ASP 2,750 plastic 1,545 56,1 15,52 5 32,5165 ASP 0,190 6 Lens 3 99,9183 ASP 0,717 plastic 1,639 23,5 -5,52 7 3,3973 ASP 0,646 8 Lens 4 5,0010 ASP 0,597 plastic 1,544 56,0 17,23 9 10,2693 ASP 0,551 10 Lens 5 -59,1225 ASP 0,811 plastic 1,660 20,4 13,35 11 -7,7081 ASP -0,220 12 aperture plan 2,013 13 Lens 6 10,8695 ASP 1,600 plastic 1,544 56,0 -52,04 14 7,4469 ASP 0,302 15 aperture plan D15 16 filter plan 0,110 Glass 1,517 64,2 - 17 plan 1,002 18 Picture plan - The reference wavelength is 587.6 nm (d-line). L1 has a reflective surface (in the 6th embodiment, L1 is a prism with a non-flat surface). The maximum distance between the optical effective area of ​​surface 3 (aperture S1) and the optical axis is 3.213 mm. The maximum distance between the optically effective area of ​​surface 12 (aperture S2) and the optical axis is 2.444 mm. The maximum distance between the optically effective area of ​​surface 15 (aperture S3) and the optical axis is 2,430 mm. Table 6B - Aspherical coefficients Surface # 4 5 6 7 k = 0,00000E+00 0,00000E+00 0,00000E+00 0,00000E+00 A4 = -9,0815947E-04 1,2359561E-02 1,8991647E-02 1,1129511 E-02 A6 = 4,6912879E-05 -1,3555870E-02 -2,4440472E-02 -2,2159238E-02 A8 = -3,0154857E-05 6,0145190E-03 1,2355310E-02 1,2403092E-02 A10 = 6,0433280E-06 -1,6077643E-03 -3,7017263E-03 -4,4681751E-03 A12 = -7,4696691E-07 2,9491769E-04 7,3816572E-04 1,1427676E-03 A14 = 4,6146248E-08 -4,0601708E-05 -1,0248261E-04 -2,1001614E-04 A16 = -1,1274514E-09 4,1193848E-06 9,7248289E-06 2,6403544E-05 A18 = -2,6267765E-07 -5,6540412E-07 -2,0031273E-06 A20 = 7,4925241E-09 1,4934342E-08 6,7725073E-08 Surface # 8 9 10 11 k = 0,00000E+00 0,00000E+00 0,00000E+00 0,00000E+00 A4 = 2,7932658E-03 -1,3223838E-03 7,6306208E-03 7,3483002E-03 A6 = -5,0076891E-03 7,0943125E-04 -1,2846561E-03 -1,4530633E-03 A8 = 1,6109671E-03 -1,3498382E-04 1,3882027E-03 9,7637884E-04 A10 = -5,7650642E-04 -2,6854690E-04 -7,4881211E-04 -4,2411430E-04 A12 = 1,7300031E-04 1,1683681 E-04 1,8601436E-04 8,9987720E-05 A14 = -2,8234563E-05 -1,5783508E-05 -2,2862233E-05 -9,3977305E-06 A16 = 2,3510434E-06 6,7974546E-07 1,2581030E-06 3,8107901E-07 A18 = -8,4649261E-08 -2,0760473E-08 surface 13 14 # k = 0,00000E+00 0,00000E+00 A4 = -4,9369650E-04 -1,4063372E-03 A6 = -1,2403465E-03 -2,5248894E-03 A8 = 7,6522772E-04 2,3675080E-03 A10 = -4,2888552E-04 -1,4056289E-03 A12 = 1,6647201E-04 5,2387242E-04 A14 = -4,1664471E-05 -1,2199873E-04 A16 = 6,3636676E-06 1,7199571E-05 A18 = -5,3618378E-07 -1,3403852E-06 A20 = 1,9030846E-08 4,4267059E-08

[0198] According to Table 6A, the values ​​of f, Fno, HFOV, D0, D2 and D15 in the 1st state and in the 2nd state of the imaging optical lens assembly according to the 6th embodiment are shown in Table 6C, where D2 is the central thickness of the surface 2, D15 is the central thickness of the surface 15. Table 6C - 6th embodiment Condition 1. 2. f (mm) 20,71 20,50 Fno 2,53 2,70 HFOV (degree) 10,8 10,5 D0 infinity 800,000 D2 2,340 1,463 D15 6,787 7,664

[0199] According to the sixth embodiment, the second lens element E2 to the sixth lens element E6 can be moved along the optical axis relative to the image sensor IS to focus according to the variation of the object distance, but are not limited thereto. They may be similar to the first embodiment and will not be repeated here.

[0200] In the sixth embodiment, the equation for the aspherical surface profiles of the above-mentioned lens elements is the same as the equation of the first embodiment. The definitions of these parameters shown in the following table are also the same as in the first embodiment with the corresponding values ​​for the sixth embodiment, so an explanation thereof will not be provided again.

[0201] In addition, these parameters can be calculated from Table 6A, Table 6B and Table 6C as the following values ​​and satisfy the following conditions in Table 6D: Table 6D - 6th embodiment 1. Condition 2nd state 1. Condition 2nd state V2 / V3 2,39 2,39 |f / R5| 0,21 0,21 (T34+T45) / T56 0,67 0,67 f / R6 6,10 6,03 CT4 / CT3 0,83 0,83 f / R8 2,02 2,00 Dr1 r4 / CT3 17,27 16,04 f1 / f3 -6,11 -6,11 Dr1 r4 / Dr5r12 1,84 1,71 f2 / R3 2,25 2,25 |R6 / R5| 0,03 0,03 f5 / CT5 16,46 16,46 R7 / |f4| 0,29 0,29 f5 / f3 -2,42 -2,42 R8 / R7 2,05 2,05 Y21 / ImgH 0,79 0,79 |f / f6| 0,40 0,39 Y21 / Y62 1,32 1,32 <7th Embodiment>

[0202] Fig. 18A is a schematic view of one side of an electronic device 100 according to the 7th embodiment of the present disclosure. Fig. 18B is a schematic view of another side of the electronic device 100 of Fig. 18A. Fig. 18C is a schematic system view of the electronic device 100 of Fig. 18A. In Fig. 18A, Fig. 18B and Fig.18C, the electronic device 100 according to the 7th embodiment is a smartphone that includes imaging devices 110, 120, 130, 140, 150, 160, a flash module 101, a focus assist module, an image signal processor (ISP), a user interface 102, and an image software processor, wherein each of the imaging devices 140, 150, 160 is a front camera.

[0203] The imaging device 110 includes an imaging lens assembly, a drive device, an image sensor IS, and an image stabilization module, wherein the imaging lens assembly includes the optical imaging lens assembly according to the present disclosure, a mount, and a holding member for holding the optical imaging lens assembly. It should be noted that the imaging optical lens assembly includes a light path folding element E8 having a reflective surface. The light path folding element E8 may be, but is not limited to, a prism. The imaging device 110 can focus light from an imaged object via the imaging lens assembly, perform image focusing by the drive device, and form an image on the image sensor, and the imaging information can be transmitted.

[0204] The drive device can have functions such as focal length adjustment, etc., which can be driven by drive systems such as screws, moving coil motors (VCMs), which can be spring-type or ball-type, microelectromechanical systems (MEMS), piezoelectric, or shape memory alloys, etc. The imaging optical lens assembly can obtain a better image position via the drive device, making it beneficial for obtaining clear images of the object at different object distances. Furthermore, at least one lens element of the imaging optical lens assembly can be moved relative to the image sensor IS along the optical axis via the drive device, so that effects such as zooming or focusing, etc., can be achieved. Furthermore, the reflective surface can be rotated relative to the image sensor via the drive device (such as roll, pitch, or yaw movements, etc.).), making it useful for compensating for the relative variation in position between the image and the image sensor to achieve effects such as optical image stabilization, etc.

[0205] The imaging device 110 may include the image sensor IS located on the image surface of the imaging optical lens assembly, such as CMOS and CCD, with high light sensitivity and low noise. Therefore, it is beneficial for providing realistic images with high-resolution image quality therefrom. Furthermore, the imaging device 110 may further include an image stabilization module, which may be a motion sensor, such as an accelerometer, a gyro sensor, and a Hall effect sensor. Therefore, the variation of the various axial directions of the imaging optical lens assembly can be adjusted to compensate for the image blur generated by the movement at the moment of exposure, and it is further beneficial for improving image quality when photographing in motion and in low-light conditions.In addition, advanced image compensation functions such as optical image stabilization (OIS) and electronic image stabilization (EIS), etc. can be provided.

[0206] When the user captures images of an imaged object via user interface 102, electronic device 100 focuses and generates an image via at least one of imaging devices 110, 120, 130, 140, 150, or 160, while compensating for low illumination via flash module 101 if necessary. Electronic device 100 then quickly focuses on the imaged object according to its object distance information provided by the focus assist module and optimizes the image via the image signal processor and the image software processor. This can further improve image quality.The focus assist module may accept conventional infrared or laser beams for rapid focusing, and the user interface 102 may utilize a touch-sensitive screen or a physical button for capturing and processing the image with various functions of the image processing software.

[0207] Each of the imaging devices 120, 130, 140, 150, 160 may include the imaging optical lens assembly of the present disclosure and may be the same or similar to the imaging device 110 and will not be described again herein. In detail, the imaging devices 110, 120, 130 may be a telephoto imaging device (including a light path folding element), a wide-angle imaging device, or an ultra-wide-angle imaging device, respectively. The imaging devices 140, 150, 160 may be wide-angle imaging devices, ultra-wide-angle imaging devices, or TOF (time of flight) modules, respectively, or they may be other imaging devices, not limited thereto. Further, in Fig.18C, each of the elements in the imaging device 110 may be the same as or similar to any number of the corresponding element according to the 1st to 6th embodiments, which will not be shown and described in detail again. <8th Embodiment>

[0208] Fig. 19 is a schematic side view of an electronic device 200 according to the eighth embodiment of the present disclosure. According to the eighth embodiment, the electronic device 200 is a smartphone that includes imaging devices 210, 220, 230, 240, 250, 260, 270, 280, 290, and a flash module 201.

[0209] The electronic device 200 according to the 8th embodiment may include the same or similar elements as those according to the 7th embodiment, and each of the imaging devices 210, 220, 230, 240, 250, 260, 270, 280, 290 and the flash module 201 may have a configuration that is the same or similar to that according to the 7th embodiment and will not be described again herein. In detail, each of the imaging devices 210, 220, 230, 240, 250, 260, 270, 280, 290 according to the 8th embodiment may include the imaging optical lens assembly of the present disclosure and may be the same or similar to the imaging device 110 according to the aforementioned 7th embodiment and will not be described again herein.

[0210] In detail, each of the imaging devices 210, 220 may be an ultra-wide angle imaging device, each of the imaging devices 230, 240 may be a wide angle imaging device, each of the imaging devices 250, 260 may be a telephoto imaging device, each of the imaging devices 270, 280 may be a telephoto imaging device (which may include a light path folding element), the imaging device 290 may be a TOF module, or may be adaptively adjusted according to the type of imaging devices, which is not limited to the arrangement.

Claims

[1] An imaging optical lens assembly comprising six lens elements (E1, E2, E3, E4, E5, E6), wherein the six lens elements (E1, E2, E3, E4, E5, E6) are in order from an object side to an image side along an optical path: a first lens element (E1), a second lens element (E2), a third lens element (E3), a fourth lens element (E4), a fifth lens element (E5), and a sixth lens element (E6); wherein each of the six lens elements (E1, E2, E3, E4, E5, E6) has an object-side surface toward the object side and an image-side surface toward the image side; wherein the object-side surface of the first lens element (E1) is convex in a paraxial region thereof; the second lens element (E2) has a positive refractive power; the image-side surface of the third lens element (E3) is concave in a paraxial region thereof; the object-side surface of the fourth lens element (E4) is convex in a paraxial region thereof, the image-side surface of the fourth lens element (E4) is concave in a paraxial region thereof; at least one of the second lens element (E2) to the sixth lens element (E6) comprises at least one bending point (IP) in an optically effective surface thereof; wherein an axial distance between the third lens element (E3) and the fourth lens element (E4) is T34, an axial distance between the fourth lens element (E4) and the fifth lens element (E5) is T45, an axial distance between the fifth lens element (E5) and the sixth lens element (E6) is T56, an axial distance between the object-side surface of the first lens element (E1) and the image-side surface of the second lens element (E2) of the imaging optical lens assembly is Dr1r4, a central thickness of the third lens element (E3) is CT3, a focal length of the imaging optical lens assembly is f, a radius of curvature of the image-side surface of the third lens element (E3) is R6, and the following conditions are met: 0.10<(T34+T45) / T56<1.6; 6.5>Dr1r4 / CT3; and 4.4 <f r6.[2] An imaging optical lens assembly according to claim 1, wherein the axial distance between the third lens element (E3) and the fourth lens element (E4) is T34, the axial distance between the fourth lens element (E4) and the fifth lens element (E5) is T45, the axial distance between the fifth lens element (E5) and the sixth lens element (E6) is T56, and the following condition is satisfied: 0.30<(T34+T45) / T56<1.

4. [3] An imaging optical lens assembly according to claim 1, wherein an Abbe number of the second lens element (E2) is V2, an Abbe number of the third lens element (E3) is V3, and the following condition is satisfied: 1.95 <v2 v3<3,50.[4] The imaging optical lens assembly according to claim 1, wherein the axial distance between the object-side surface of the first lens element (E1) and the image-side surface of the second lens element (E2) of the imaging optical lens assembly is Dr1r4, an axial distance between the object-side surface of the third lens element (E3) and the image-side surface of the sixth lens element (E6) of the imaging optical lens assembly is Dr5r12, and the following condition is satisfied: 1.6 <dr1r4 dr5r12<2,3.[5] The imaging optical lens assembly according to claim 1, wherein a radius of curvature of the object-side surface of the third lens element (E3) is R5, a radius of curvature of the object-side surface of the fourth lens element (E4) is R7, the focal length of the imaging optical lens assembly is f, a focal length of the fourth lens element (E4) is f4, and the following conditions are satisfied: 0 <r7 |4|<0,55; und|f / R5|<0.

60. [6] The imaging optical lens assembly according to claim 1, wherein an F-number of the imaging optical lens assembly is Fno, a maximum distance between an optically effective area of the object-side surface of the second lens element (E2) and an optical axis is Y21, a maximum image height of the imaging optical lens assembly is ImgH, and the following conditions are satisfied: 2.0 <fno<3,3; und 0,60 <y21 imgh<1,0.[7] Imaging device (1), comprising: the imaging optical lens assembly of claim 1; and an image sensor (IS) arranged on an image surface (IMG) of the imaging optical lens assembly. [8] Imaging device (1) according to claim 7, wherein at least one of the six lens elements (E1, E2, E3, E4, E5, E6) is movable relative to the image sensor (IS) along an optical axis. [9] Electronic device (100) comprising: the imaging device (1) according to claim 7. [10] An imaging optical lens assembly comprising six lens elements (E1, E2, E3, E4, E5, E6), wherein the six lens elements (E1, E2, E3, E4, E5, E6) are in order from an object side to an image side along an optical path: a first lens element (E1), a second lens element (E2), a third lens element (E3), a fourth lens element (E4), a fifth lens element (E5), and a sixth lens element (E6); wherein each of the six lens elements (E1, E2, E3, E4, E5, E6) has an object-side surface toward the object side and an image-side surface toward the image side; wherein the object-side surface of the first lens element (E1) is convex in a paraxial region thereof; the object-side surface of the second lens element (E2) is convex in a paraxial region thereof; the image-side surface of the third lens element (E3) is concave in a paraxial region thereof; the object-side surface of the fourth lens element (E4) is convex in a paraxial region thereof, the image-side surface of the fourth lens element (E4) is concave in a paraxial region thereof; at least one of the second lens element (E2) to the sixth lens element (E6) comprises at least one bending point (IP) in an optically effective surface thereof; wherein an axial distance between the third lens element (E3) and the fourth lens element (E4) is T34, an axial distance between the fourth lens element (E4) and the fifth lens element (E5) is T45, an axial distance between the fifth lens element (E5) and the sixth lens element (E6) is T56, an axial distance between the object-side surface of the first lens element (E1) and the image-side surface of the second lens element (E2) of the imaging optical lens assembly is Dr1r4, a central thickness of the third lens element (E3) is CT3, a focal length of the imaging optical lens assembly is f, a radius of curvature of the image-side surface of the third lens element (E3) is R6, and the following conditions are met: <h2 style=";text-align:left;direction:ltr">0.10<(T34+T45) / T56<1.6;<h2 style=";text-align:left;direction:ltr"> <h2 style=";text-align:left;direction:ltr"> 6.5<h2 style=";text-align:left;direction:ltr"> <dr1r4 ct3; und 4,4 <f r6.[11] An imaging optical lens assembly according to claim 10, wherein the axial distance between the object-side surface of the first lens element (E1) and the image-side surface of the second lens element (E2) of the imaging optical lens assembly is Dr1r4, the central thickness of the third lens element (E3) is CT3, the focal length of the imaging optical lens assembly is f, the radius of curvature of the image-side surface of the third lens element (E3) is R6, and the following conditions are satisfied: 9.0 <dr1r4 ct3<45; und 4,9 <f r6<8,0.[12] The imaging optical lens assembly according to claim 11, wherein the axial distance between the third lens element (E3) and the fourth lens element (E4) is T34, the axial distance between the fourth lens element (E4) and the fifth lens element (E5) is T45, the axial distance between the fifth lens element (E5) and the sixth lens element (E6) is T56, the axial distance between the object-side surface of the first lens element (E1) and the image-side surface of the second lens element (E2) of the imaging optical lens assembly is Dr1r4, the central thickness of the third lens element (E3) is CT3, a central thickness of the fourth lens element (E4) is CT4, the focal length of the imaging optical lens assembly is f, the radius of curvature of the image-side surface of the third lens element (E3) is R6, and the following conditions are satisfied: 0.47≤(T34+T45) / T56≤1.24; 13.80≤Dr1r4 / CT3≤24.06; 5.42≤f / R6≤6.25; and 0.68≤CT4 / CT3≤1.

16. [13] An imaging optical lens assembly according to claim 10, wherein the focal length of the imaging optical lens assembly is f, a radius of curvature of the image-side surface of the fourth lens element (E4) is R8, and the following condition is satisfied: 1.1 <f r8<4,5.[14] An imaging optical lens assembly according to claim 10, wherein the second lens element (E2) has a positive refractive power; the focal length of the imaging optical lens assembly is f, a focal length of the second lens element (E2) is f2, a focal length of the sixth lens element (E6) is f6, a radius of curvature of the object-side surface of the second lens element (E2) is R3, and the following conditions are satisfied: 1.3 <f2 r3<3,0; und|f / f6|<1.

1. [15] The imaging optical lens assembly according to claim 10, wherein an optically effective area of at least one surface of at least one of the first lens elements (E1) to the sixth lens element (E6) is non-circular; the imaging optical lens assembly further comprises a diaphragm (S1) having an optically effective area that is non-circular. [16] An imaging optical lens assembly comprising six lens elements (E1, E2, E3, E4, E5, E6), wherein the six lens elements (E1, E2, E3, E4, E5, E6) are in order from an object side to an image side along an optical path: a first lens element (E1), a second lens element (E2), a third lens element (E3), a fourth lens element (E4), a fifth lens element (E5), and a sixth lens element (E6); wherein each of the six lens elements (E1, E2, E3, E4, E5, E6) has an object-side surface toward the object side and an image-side surface toward the image side; wherein the object-side surface of the first lens element (E1) is convex in a paraxial region thereof; the object-side surface of the second lens element (E2) is convex in a paraxial region thereof; the third lens element (E3) has a negative refractive power; the object-side surface of the fourth lens element (E4) is convex in a paraxial region thereof, the image-side surface of the fourth lens element (E4) is concave in a paraxial region thereof; at least one of the second lens element (E2) to the sixth lens element (E6) comprises at least one bending point (IP) in an optically effective surface thereof; wherein an axial distance between the third lens element (E3) and the fourth lens element (E4) is T34, an axial distance between the fourth lens element (E4) and the fifth lens element (E5) is T45, an axial distance between the fifth lens element (E5) and the sixth lens element (E6) is T56, an axial distance between the object-side surface of the first lens element (E1) and the image-side surface of the second lens element (E2) of the imaging optical lens assembly is Dr1r4, a central thickness of the third lens element (E3) is CT3, a central thickness of the fourth lens element (E4) is CT4, and the following conditions are met: 0.10<(T34+T45) / T56<1.6; 11 <dr1r4 ct3<45; und 0,10 <ct4 ct3<1,7.[17] An imaging optical lens assembly according to claim 16, wherein the central thickness of the third lens element (E3) is CT3, the central thickness of the fourth lens element (E4) is CT4, and the following condition is satisfied: 0.40 <ct4 ct3<1,4.[18] An imaging optical lens assembly according to claim 16, wherein a radius of curvature of the object-side surface of the third lens element (E3) is R5, a radius of curvature of the image-side surface of the third lens element (E3) is R6, and the following condition is satisfied: |R6 / R5|<0.

16. [19] An imaging optical lens assembly according to claim 16, wherein a radius of curvature of the object-side surface of the fourth lens element (E4) is R7, a radius of curvature of the image-side surface of the fourth lens element (E4) is R8, and the following condition is satisfied: 0.85 <r8 r7<3,0.[20] The imaging optical lens assembly according to claim 16, wherein half of a maximum field of view of the imaging optical lens assembly is HFOV, a maximum distance between an optically effective area of the object-side surface of the second lens element (E2) and an optical axis is Y21, a maximum distance between an optically effective area of the image-side surface of the sixth lens element (E6) and the optical axis is Y62, and the following conditions are met: 5.0 degrees <hfov<20,0 grad; und 1,1 <y21 y62<1,5.[21] An imaging optical lens assembly according to claim 16, wherein the first lens element (E1) has a positive refractive power, a focal length of the first lens element (E1) is f1, a focal length of the third lens element (E3) is f3, and the following condition is satisfied: −16 <f1 f3<−5,0.[22] An imaging optical lens assembly according to claim 16, wherein the fifth lens element (E5) has a positive refractive power, a focal length of the fifth lens element (E5) is f5, a central thickness of the fifth lens element (E5) is CT5, and the following condition is satisfied: 6.0 <f5 ct5<90.[23] An imaging optical lens assembly according to claim 16, wherein the fifth lens element (E5) has a positive refractive power, a focal length of the third lens element (E3) is f3, a focal length of the fifth lens element (E5) is f5, and the following condition is satisfied: −15 <f5 f3<−1,2.[24] The imaging optical lens assembly of claim 16, further comprising: at least one reflective surface located between the object-side surface of the first lens element (E1) and the object-side surface of the second lens element (E2) along the optical axis. < / hfov<20,0 grad; und < / dr1r4> < / f> < / f> < / dr1r4> < / f> < / dr1r4> < / fno<3,3; und < / f>

Images