Optical lens assembly for imaging, image acquisition unit and electronic device

Abstract

An optical lens assembly for imaging, comprising seven lens elements, the seven lens elements being, 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), a sixth lens element (E6), and a seventh lens element (E7), each of the seven lens elements having an object-side surface facing the object side and an image-side surface facing the image side; wherein the first lens element (E1) has a negative refractive power, the second lens element (E2) has a negative refractive power, the image-side surface of the second lens element (E2) is concave in a paraxial region thereof, the fifth lens element (E5) has a negative refractive power, the image-side surface of the fifth lens element (E5) is concave in a paraxial region thereof, the image-side surface of the sixth lens element (E6) is concave in a paraxial region thereof, the image-side surface of the seventh lens element (E7) is concave in a paraxial region thereof, and the image-side surface of the seventh lens element (E7) has at least one inflection point; wherein an axial distance between the object-side surface of the first lens element (E1) and the image-side surface of the seventh lens element (E7) is TD, a focal length of the optical lens assembly for imaging is f, an axial distance between the object-side surface of the first lens element (E1) and an image surface (IMG) is TL, a central thickness of the third lens element (E3) is CT3, and the following conditions are met: 2.00 < TD / f < 5.20 ; and 3.00 < TL / CT3 < 8.00.

Description

BACKGROUNDField of expertise

[0001] The present disclosure relates to an optical lens assembly for imaging, an image capture unit, and an electronic device, particularly to an optical lens assembly for imaging and an image capture unit that can be used in an electronic device. Description of related technology

[0002] With the development of semiconductor manufacturing technology, the performance of image sensors has improved and their pixel size has been reduced. Therefore, high image quality is now one of the essential features of an optical system.

[0003] Furthermore, due to rapid technological changes, electronic devices equipped with optical systems are becoming increasingly multifunctional for various applications, increasing the requirements for the functionality of the optical systems. However, with a conventional optical system, it is difficult to achieve a balance between requirements such as high image quality, low sensitivity, a suitable aperture size, miniaturization, and a desirable field of view. SUMMARY

[0004] According to one aspect of the present disclosure, an optical lens assembly for imaging includes seven lens elements. The seven 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, a sixth lens element, and a seventh lens element. Each of the seven lens elements has an object-side surface facing the object side and an image-side surface facing the image side.

[0005] Preferably, the first lens element has a negative refractive power. Preferably, the second lens element has a negative refractive power. Preferably, the image-side surface of the second lens element is concave in a paraxial region thereof. Preferably, the fifth lens element has a negative refractive power. Preferably, the image-side surface of the fifth lens element is concave in a paraxial region thereof. Preferably, the image-side surface of the sixth lens element is concave in a paraxial region thereof. Preferably, the image-side surface of the seventh lens element is concave in a paraxial region thereof. Preferably, the image-side surface of the seventh lens element has at least one inflection point.

[0006] When an axial distance between the object-side surface of the first lens element and the image-side surface of the seventh lens element is TD, a focal length of the optical lens assembly for imaging is f, an axial distance between the object-side surface of the first lens element and an image surface is TL, and a central thickness of the third lens element is CT3, the following conditions are preferably satisfied: 2.00 <TD / f<5,20; und 3.00 <TL / CT3<8,00.

[0007] According to another aspect of the present disclosure, an optical lens assembly for imaging includes seven lens elements. The seven 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, a sixth lens element, and a seventh lens element. Each of the seven lens elements has an object-side surface facing the object side and an image-side surface facing the image side.

[0008] Preferably, the first lens element has a negative refractive power. Preferably, the image-side surface of the second lens element is concave in a paraxial region thereof. Preferably, the fifth lens element has a negative refractive power. Preferably, the image-side surface of the fifth lens element is concave in a paraxial region thereof. Preferably, the image-side surface of the sixth lens element is concave in a paraxial region thereof. Preferably, the image-side surface of the seventh lens element is concave in a paraxial region thereof. Preferably, the image-side surface of the seventh lens element has at least one inflection point.

[0009] When an axial distance between the object-side surface of the first lens element and the image-side surface of the seventh lens element is TD, a focal length of the imaging optical lens assembly is f, a maximum value among the axial distances between each of all adjacent lens elements of the imaging optical lens assembly is ATmax, a radius of curvature of the object-side surface of the second lens element is R3, and a radius of curvature of the image-side surface of the second lens element is R4, the following conditions are preferably satisfied: 2.00 <TD / f<6,00; 0.20 <ATmax / f<0,85; und 0.00<(R3+R4) / (R3−R4)<10.00.

[0010] According to another aspect of the present disclosure, an optical lens assembly for imaging comprises seven lens elements. The seven 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, a sixth lens element, and a seventh lens element. Each of the seven lens elements has an object-side surface facing the object side and an image-side surface facing the image side.

[0011] Preferably, the first lens element has a negative refractive power. Preferably, the second lens element has a negative refractive power. Preferably, the image-side surface of the second lens element is concave in a paraxial region thereof. Preferably, the fifth lens element has a negative refractive power. Preferably, the image-side surface of the fifth lens element is concave in a paraxial region thereof. Preferably, the image-side surface of the sixth lens element is concave in a paraxial region thereof. Preferably, the image-side surface of the seventh lens element is concave in a paraxial region thereof. Preferably, the image-side surface of the seventh lens element has at least one inflection point.

[0012] When an axial distance between the object-side surface of the first lens element and the image-side surface of the seventh lens element is TD, a focal length of the optical lens assembly for imaging is f, a combined focal length of the second lens element, the third lens element, the fourth lens element, and the fifth lens element is f2345, a central thickness of the second lens element is CT2, a central thickness of the third lens element is CT3, and an axial distance between the second lens element and the third lens element is T23, the following conditions are preferably satisfied: 2.00 <TD / f<5,20; und 0.80 <f2345 / (CT2+T23+CT3)<1,60.

[0013] According to another aspect of the present disclosure, an image capture unit comprises one of the aforementioned imaging optical lens assemblies and an image sensor, wherein the image sensor is arranged on the image surface of the imaging optical lens assembly.

[0014] According to another aspect of the present disclosure, an electronic device comprises the aforementioned image capture unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The disclosure can be better understood from the following detailed description of the embodiments with reference to the accompanying drawings: Fig. 1 is a schematic view of an image acquisition unit according to the first embodiment of the present disclosure; Fig. 2 shows spherical aberration curves, astigmatic field curves and a distortion curve of the image acquisition unit according to the first embodiment; Fig. 3 is a schematic view of an image acquisition unit according to the second embodiment of the present disclosure; Fig. 4 shows spherical aberration curves, astigmatic field curves and a distortion curve of the image acquisition unit according to the second embodiment; Fig. 5 is a schematic view of an image acquisition unit according to the third embodiment of the present disclosure; Fig. 6 shows spherical aberration curves, astigmatic field curves and a distortion curve of the image sensing unit according to the third embodiment; Fig. 7 is a schematic view of an image acquisition unit according to the fourth embodiment of the present disclosure; Fig. 8 shows spherical aberration curves, astigmatic field curves, and a distortion curve of the image sensing unit according to the fourth embodiment; Fig.9 is a schematic view of an image acquisition unit according to the fifth embodiment of the present disclosure; Fig. 10 shows spherical aberration curves, astigmatic field curves and a distortion curve of the image sensing unit according to the 5th embodiment; Fig. 11 is a schematic view of an image acquisition unit according to the 6th embodiment of the present disclosure; Fig. 12 shows spherical aberration curves, astigmatic field curves and a distortion curve of the image sensing unit according to the 6th embodiment; Fig. 13 is a schematic view of an image acquisition unit according to the 7th embodiment of the present disclosure; Fig. 14 shows spherical aberration curves, astigmatic field curves and a distortion curve of the image sensing unit according to the 7th embodiment; Fig.15 is a schematic view of an image acquisition unit according to the 8th embodiment of the present disclosure; Fig. 16 shows spherical aberration curves, astigmatic field curves and a distortion curve of the image sensing unit according to the 8th embodiment; Fig. 17 is a schematic view of an image acquisition unit according to the 9th embodiment of the present disclosure; Fig. 18 shows spherical aberration curves, astigmatic field curves and a distortion curve of the image sensing unit according to the 9th embodiment; Fig. 19 is a schematic view of an image acquisition unit according to the 10th embodiment of the present disclosure; Fig. 20 shows spherical aberration curves, astigmatic field curves and a distortion curve of the image sensing unit according to the 10th embodiment; Fig.21 is a schematic view of an image acquisition unit according to the 11th embodiment of the present disclosure; Fig. 22 shows spherical aberration curves, astigmatic field curves and a distortion curve of the image sensing unit according to the 11th embodiment; Fig. 23 is a schematic view of an image acquisition unit according to the 12th embodiment of the present disclosure; Fig. 24 shows spherical aberration curves, astigmatic field curves and a distortion curve of the image sensing unit according to the 12th embodiment; Fig. 25 is a perspective view of an image acquisition unit according to the 13th embodiment of the present disclosure; Fig. 26 is a perspective view of an electronic device according to the 14th embodiment of the present disclosure; Fig.27 is another perspective view of the electronic device in Fig. 26; Fig. 28 is a perspective view of an electronic device according to the 15th embodiment of the present disclosure; Fig. 29 is another perspective view of the electronic device in Fig. 28; Fig. 30 is a block diagram of the electronic device in Fig. 28; Fig. 31 is a perspective view of an electronic device according to the 16th embodiment of the present disclosure; Fig. 32 is a perspective view of an electronic device according to the 17th embodiment of the present disclosure; Fig. 33 is a schematic view of an electronic device according to the 18th embodiment of the present disclosure; Fig.34 shows a schematic view of inflection points on lens surfaces and critical points on lens surfaces according to the first embodiment of the present disclosure; Fig. 35 shows a schematic view of a configuration of a light-directing element in an optical lens assembly for imaging according to an embodiment of the present disclosure; Fig. 36 shows a schematic view of another configuration of a light-directing element in an optical lens assembly for imaging according to an embodiment of the present disclosure; and Fig. 37 shows a schematic view of a configuration of two light-directing elements in an optical lens assembly for imaging according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0016] An optical lens assembly for imaging comprises seven lens elements. The seven 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, a sixth lens element, and a seventh lens element. Each of the seven lens elements has an object-side surface facing the object side and an image-side surface facing the image side.

[0017] The first lens element may have a negative refractive power. Therefore, it is advantageous for enlarging the field of view. The image-side surface of the first lens element may be concave in a paraxial region thereof. Therefore, it is advantageous for adjusting the propagation direction of light, thereby concentrating incident light from a wide field of view.

[0018] The second lens element may have a negative refractive power. Therefore, it is well-suited for working with the third lens element, thereby correcting spherical and chromatic aberrations. The image-side surface of the second lens element is concave in a paraxial region thereof. Therefore, it is well-suited for adjusting the lens shape of the second lens element, thereby correcting aberrations.

[0019] The object-side surface of the third lens element may be convex in a paraxial region thereof. Therefore, it is favorable for adjusting the lens shape of the third lens element, thereby improving the focusing ability of the third lens element.

[0020] The image-side surface of the fourth lens element may be convex in a paraxial region thereof. Therefore, it is favorable for adjusting the propagation direction of light, thereby correcting spherical aberration.

[0021] The fifth lens element may have a negative refractive power. Therefore, it is advantageous for correcting spherical and chromatic aberrations. The image-side surface of the fifth lens element is concave in a paraxial region thereof. Therefore, it is advantageous for adjusting the lens shape of the fifth lens element, thereby improving the negative refractive power of the fifth lens element.

[0022] The image surface of the sixth lens element is concave in a paraxial region thereof. Therefore, it is beneficial for correcting the field curvature and distortion of the optical lens assembly for imaging.

[0023] The seventh lens element may have a negative refractive power. Therefore, it is advantageous for balancing the refractive power configuration at the image end of the optical lens assembly for imaging to correct aberrations. The image-side surface of the seventh lens element is concave in a paraxial region thereof. Therefore, it is advantageous for reducing the backfocal length.

[0024] According to the present disclosure, the image-side surface of the seventh lens element has at least one inflection point. Therefore, it is advantageous for correcting the field curvature of the imaging optical lens assembly while simultaneously reducing the overall path length of the imaging optical lens assembly. See Fig.34, which shows a schematic view of the inflection points P on the image-side surface of the seventh lens element E7 according to the first embodiment of the present disclosure. The above-mentioned inflection points P on the image-side surface of the seventh lens element E7 as well as the object-side surface of the sixth lens element E6, the image-side surface of the sixth lens element E6, and the object-side surface of the seventh lens element E7 in Fig. 34 are exemplary. Each of all lens surfaces in various embodiments of the present disclosure may also have one or more inflection points.

[0025] According to the present disclosure, each of at least two of an Abbe number of the second lens element, an Abbe number of the third lens element, and an Abbe number of the sixth lens element may be less than 40.0. Therefore, this is advantageous for eliminating color distortions of images.

[0026] When an axial distance between the object-side surface of the first lens element and the image-side surface of the seventh lens element is TD and a focal length of the imaging optical lens assembly is f, the following condition is satisfied: 2.00 < TD / f < 6.00. Therefore, it is favorable for balancing the total path length of the imaging optical lens assembly and controlling the field of view to form a wide field of view characteristic. In addition, the following condition may also be satisfied: 2.00 < TD / f < 5.20. Furthermore, the following condition may also be satisfied: 2.60 < TD / f < 5.00. Furthermore, the following condition may also be satisfied: 2.86 ≤ TD / f ≤ 4.95.

[0027] When an axial distance between the object-side surface of the first lens element and an image surface is TL and a central thickness of the third lens element is CT3, the following condition can be satisfied: 3.00 < TL / CT3 < 8.00. Therefore, it is advantageous for increasing the converging ability of the third lens element. In addition, the following condition can also be satisfied: 4.00 < TL / CT3 < 6.50. In addition, the following condition can also be satisfied: 4.00 < TL / CT3 < 6.00. In addition, the following condition can also be satisfied: 4.73 ≤ TL / CT3 ≤ 5.73.

[0028] When a maximum value among the axial distances between each of all adjacent lens elements of the imaging optical lens assembly is ATmax and the focal length of the imaging optical lens assembly is f, the following condition can be satisfied: 0.20 < ATmax / f < 0.85. Therefore, it is beneficial for balancing the size distribution of the imaging optical lens assembly, thereby increasing the assembly yield. In addition, the following condition can also be satisfied: 0.25 < ATmax / f < 0.80. In addition, the following condition can also be satisfied: 0.25 < ATmax / f < 0.65. In addition, the following condition can also be satisfied: 0.31 ≤ ATmax / f ≤ 0.61.

[0029] When the radius of curvature of the object-side surface of the second lens element is R3 and the radius of curvature of the image-side surface of the second lens element is R4, the following condition can be satisfied: 0.00 < (R3+R4) / (R3-R4) < 10.00. Therefore, it is advantageous to adjust the lens shape and the refractive power of the second lens element to thereby harmonize the incident angle of light from the wide field of view. Furthermore, the following condition can also be satisfied: 0.10 < (R3+R4) / (R3-R4) < 8.00. Furthermore, the following condition can also be satisfied: 0.40 < (R3+R4) / (R3-R4) < 6.00. In addition, the following condition can also be met: 0.70 ≤ (R3+R4) / (R3-R4) ≤ 4.15.

[0030] When a combined focal length of the second lens element, the third lens element, the fourth lens element, and the fifth lens element is f2345, a central thickness of the second lens element is CT2, the central thickness of the third lens element is CT3, and an axial distance between the second lens element and the third lens element is T23, the following condition can be satisfied: 0.80 < f2345 / (CT2+T23+CT3) < 1.60. Therefore, this is beneficial for improving the correction capability to improve image quality. In addition, the following condition can also be satisfied: 0.80 < f2345 / (CT2+T23+CT3) < 1.40. In addition, the following condition can also be satisfied: 0.89 ≤ f2345 / (CT2+T23+CT3) ≤ 1.10.

[0031] When the radius of curvature of the object-side surface of the fourth lens element is R7 and the focal length of the third lens element is f3, the following condition can be satisfied: 0.30 < R7 / f3 < 1.10. Therefore, it is advantageous to prevent excessive refractive power of each of the third lens element and the fourth lens element, thereby correcting spherical aberration. Furthermore, the following condition can also be satisfied: 0.50 < R7 / f3 ≤ 1.00.

[0032] When the axial distance between the first lens element and the second lens element is T12, and the axial distance between the fifth lens element and the sixth lens element is T56, the following condition can be satisfied: 0.25 < T12 / T56 < 4.00. Therefore, it is beneficial for balancing the spatial configuration of the imaging optical lens assembly so that the imaging optical lens assembly has a wide field of view. Furthermore, the following condition can also be satisfied: 0.50 < T12 / T56 < 2.50.

[0033] When the maximum field of view of the imaging optical lens assembly (FOV) is 110.0 degrees < FOV < 190.0 degrees, the following condition can be met: 110.0 degrees < FOV < 190.0 degrees. Therefore, it is advantageous to have a wide field of view of the imaging optical lens assembly and to increase the detection range of the imaging optical lens assembly. Furthermore, the following condition can also be met: 120.0 degrees < FOV < 180.0 degrees. Furthermore, the following condition can also be met: 130.0 degrees < FOV < 170.0 degrees.

[0034] When the axial distance between the object-side surface of the first lens element and the image surface is TL and the radius of curvature of the image-side surface of the second lens element is R4, the following condition can be satisfied: 0.10 < TL / R4 < 12.00. Therefore, it is advantageous to control the ratio of the total path length of the optical lens assembly for imaging to the radius of curvature of the image-side surface of the second lens element, thereby reducing manufacturing difficulty. Furthermore, the following condition can also be satisfied: 0.40 < TL / R4 < 10.00.

[0035] When the axial distance between the image-side surface of the seventh lens element and the image surface is BL and the focal length of the imaging optical lens assembly is f, the following condition can be satisfied: 0.00 < BL / f < 0.90. Therefore, it is advantageous to reduce the back focal length to reduce the total path length of the imaging optical lens assembly. Furthermore, the following condition can also be satisfied: 0.20 < BL / f < 0.70.

[0036] According to the present disclosure, the imaging optical lens assembly may further include an aperture stop. When an axial distance between the aperture stop and the image surface is SL, and the axial distance between the object-side surface of the first lens element and the image surface is TL, the following condition may be satisfied: 0.35 < SL / TL < 0.65. Therefore, it is advantageous for effectively controlling the position of the aperture stop and thereby increasing the field of view. Furthermore, the following condition may also be satisfied: 0.40 < SL / TL < 0.60.

[0037] When the axial distance between the object-side surface of the first lens element and the image surface is TL and the central thickness of the second lens element is CT2, the following condition can be satisfied: 11.00 < TL / CT2 < 20.00. Therefore, it is advantageous to prevent excessive thinness of the second lens element to facilitate molding of the lens element.

[0038] When the axial distance between the aperture stop and the image surface is SL and the maximum image height of the imaging optical lens assembly (which can be half the diagonal length of an effective photosensitive area of ​​the image sensor) is ImgH, the following condition can be satisfied: 1.20 < SL / ImgH < 1.70. Therefore, it is advantageous for enlarging the image surface.

[0039] When the axial distance between the object-side surface of the first lens element and the image surface is TL and the maximum image height of the imaging optical lens assembly is ImgH, the following condition can be satisfied: 2.00 < TL / lmgH < 4.00. Therefore, it is beneficial to achieve a reasonable balance between reducing the total path length of the imaging optical lens assembly and increasing the image surface. Furthermore, the following condition can also be satisfied: 2.20 < TL / lmgH < 3.60.

[0040] When the axial distance between the third lens element and the fourth lens element is T34, the central thickness of the third lens element is CT3, and the central thickness of the fourth lens element is CT4, the following condition can be satisfied: 0.25 < (T34 + CT4) / CT3 < 0.90. Therefore, this is beneficial for equalizing the refractive power distribution in the central region of the optical lens assembly for imaging, thereby improving image quality. Furthermore, the following condition can also be satisfied: 0.40 < (T34 + CT4) / CT3 < 0.85.

[0041] When the axial distance between the fifth lens element and the sixth lens element is T56 and the central thickness of the fifth lens element is CT5, the following condition can be satisfied: 0.10 < T56 / CT5 < 5.00. Therefore, this is beneficial for adjusting the spatial configuration of lens elements at the image end of the optical lens assembly for imaging, thereby reducing manufacturing tolerance. Furthermore, the following condition can also be satisfied: 0.60 < T56 / CT5 < 3.00.

[0042] When the Abbe number of the fifth lens element is V5, the following condition can be satisfied: 5.00 < V5 < 40.0. Therefore, appropriate material selection of the fifth lens element is beneficial for correcting chromatic aberration.

[0043] When the Abbe number of the seventh lens element is V7, the following condition can be satisfied: 5.00 < V7 < 40.0. Therefore, it is beneficial for balancing the focusing capabilities when focusing light of different wavelengths to correct chromatic aberration.

[0044] When the focal length of the imaging optical lens assembly is f, and the combined focal length of the fifth lens element and the sixth lens element is f56, the following condition can be satisfied: -2.50 < f / f56 < 0.00. Therefore, it is advantageous for balancing the refractive power at the image end of the imaging optical lens assembly. Furthermore, the following condition can also be satisfied: -1.50 < f / f56 < -0.10.

[0045] When the combined focal length of the second lens element and the third lens element is f23, and the combined focal length of the fourth lens element and the fifth lens element is f45, the following condition can be satisfied: 0.00 < f45 / f23 < 2.00. Therefore, it is beneficial for equalizing the refractive power distributions of the lens elements on the front and rear surfaces of the aperture stop, thereby correcting chromatic aberration. Furthermore, the following condition can also be satisfied: 0.00 < f45 / f23 < 1.50.

[0046] When the axial distance between the object-side surface of the first lens element and the image surface is TL, the axial distance between the aperture stop and the image surface is SL, and the combined focal length of the first lens element, the second lens element, and the third lens element is f123, the following condition can be satisfied: -2.00 < (TL-SL) / f123 < 2.00. Therefore, it is advantageous to adjust the size and refractive power at the object end of the imaging optical lens assembly, thereby increasing the field of view. In addition, the following condition can also be satisfied: -1.50 < (TL-SL) / f123 < 1.50. In addition, the following condition can also be satisfied: -1.20 < (TL-SL) / f123 < 0.70.

[0047] When the axial distance between the aperture stop and the image surface is SL, and the combined focal length of the fourth lens element, the fifth lens element, the sixth lens element, and the seventh lens element is f4567, the following condition can be satisfied: 0.00 < SL / f4567 < 2.20. Therefore, it is advantageous for adjusting the size and refractive power distribution at the image end of the optical lens assembly for imaging. Furthermore, the following condition can also be satisfied: 0.50 < SL / f4567 < 2.00.

[0048] When the combined focal length of the first lens element and the second lens element is f12, and the combined focal length of the fifth lens element and the sixth lens element is f56, the following condition can be satisfied: 0.20 < f12 / f56 < 1.30. Therefore, it is beneficial for improving the ability to receive light from a wide field of view and achieving a proper balance in correcting aberrations. Furthermore, the following condition can also be satisfied: 0.30 < f12 / f56 < 1.20.

[0049] When the entrance pupil diameter of the imaging optical lens assembly is EPD, the axial distance between the aperture stop and the image surface is SL, the maximum image height of the imaging optical lens assembly is ImgH, and the central thickness of the fourth lens element is CT4, the following condition can be satisfied: 0.50 < (EPD × SL) / (ImgH × CT4) < 2.50. Therefore, it is advantageous to increase the illuminance and decrease the sensitivity of the lens elements located between the aperture stop and the image end of the imaging optical lens assembly while increasing the aperture. In addition, the following condition can also be satisfied: 0.70 < (EPD × SL) / (ImgH × CT4) < 2.20.

[0050] When the central thickness of the second lens element is CT2, the central thickness of the third lens element is CT3, the central thickness of the fourth lens element is CT4, the central thickness of the fifth lens element is CT5, the axial distance between the second lens element and the third lens element is T23, and an axial distance between the fourth lens element and the fifth lens element is T45, the following condition can be satisfied: 1.40 < (CT2 + T23 + CT3) / (CT4 + T45 + CT5) < 2.60. Therefore, it is advantageous for adjusting the spatial configuration in the central portion of the optical lens assembly for imaging, thereby correcting aberrations.

[0051] When the focal length of the imaging optical lens assembly is f and the radius of curvature of the object-side surface of the second lens element is R3, the following condition can be satisfied: -0.5 < f / R3 < 0.5. Therefore, it is beneficial for enlarging the field of view, controlling the sensitivity of the second lens element, and reducing flare and ghosting.

[0052] When the combined focal length of the fourth lens element and the fifth lens element is f45, the central thickness of the fourth lens element is CT4, the central thickness of the fifth lens element is CT5, and the axial distance between the fourth lens element and the fifth lens element is T45, the following condition can be satisfied: 2.00 < f45 / (CT4+T45+CT5) < 7.00. Therefore, it is advantageous for adjusting the refractive power distribution in the central portion of the optical lens assembly for imaging and for reducing the difficulty of assembly. In addition, the following condition can also be satisfied: 2.00 < f45 / (CT4+T45+CT5) < 5.50.

[0053] According to the present disclosure, the above features and conditions can be used in various combinations to achieve corresponding effects.

[0054] According to the present disclosure, the lens elements of the imaging optical lens assembly can be made of either glass or plastic material. When the lens elements are made of glass material, the refractive power distribution of the imaging optical lens assembly can be more flexible, and the influence on imaging caused by a change in ambient temperature can be reduced. The glass lens element can be manufactured either by grinding or molding. When the lens elements are made of plastic material, the manufacturing cost can be effectively reduced. Furthermore, surfaces of each lens element can be arranged to be spherical or aspherical. Spherical lens elements are easy to manufacture.The design of aspherical lens elements allows for more control variables to eliminate aberrations and reduce the required number of lens elements, effectively shortening the overall path length of the optical lens assembly for imaging. Additionally, the aspherical surfaces can be formed by plastic injection molding or glass molding.

[0055] According to the present disclosure, an aspheric lens surface means that the lens surface has an aspheric shape over its entire optically effective area or one or more parts thereof.

[0056] According to the present disclosure, the material of one or more lens elements may optionally include an additive that creates light absorption and interference effects and modifies the transmittance of the lens elements in a specific wavelength range to reduce unwanted stray light or color variations. For example, the additive may optionally filter out light in the wavelength range of 600 nm to 800 nm to reduce excessive red light and / or near-infrared light, or optionally filter out light in the wavelength range of 350 nm to 450 nm to prevent excessive blue light and / or near-ultraviolet light from interfering with the final image. The additive may be homogeneously blended with a plastic material used to manufacture a blended-material lens element by injection molding. Furthermore, the additive may be applied to the lens surfaces to achieve the aforementioned effects.

[0057] According to the present disclosure, each of an object-side surface and an image-side surface has a paraxial region and an off-axis region. The paraxial region refers to the region of the surface where light rays travel close to the optical axis, and the off-axis region refers to the region of the surface far from the paraxial region. Specifically, unless otherwise specified, when the lens element has a convex surface, it means that the surface is convex in the paraxial region thereof; when the lens element has a concave surface, it means that the surface is concave in the paraxial region thereof. When a range of refractive power or focal point of a lens element is not defined, it means that the range of refractive power or focal point of the lens element is in the paraxial region thereof.

[0058] According to the present disclosure, an inflection point is a point on the surface of the lens element where the surface changes from concave to convex or vice versa. A critical point is an off-axial point on the lens surface where its tangent is perpendicular to the optical axis. See Fig.34, which shows a schematic view of critical points C in off-axis regions of the object-side surface of the sixth lens element E6, the image-side surface of the sixth lens element E6, the object-side surface of the seventh lens element E7, and the image-side surface of the seventh lens element E7 according to the first embodiment of the present disclosure. The above-mentioned critical points C in off-axis regions of the object-side surface of the sixth lens element E6, the image-side surface of the sixth lens element E6, the object-side surface of the seventh lens element E7, and the image-side surface of the seventh lens element E7 in Fig. 34 are exemplary. Each of all lens surfaces in various embodiments of the present disclosure may also have one or more critical points in an off-axis region thereof.

[0059] According to the present disclosure, the image surface of the imaging optical lens assembly may be flat or curved based on the corresponding image sensor, wherein in particular a curved surface is concavely facing the object side of the imaging optical lens assembly.

[0060] According to the present disclosure, an image correction unit, such as a field flattener, can optionally be arranged between the lens element located along the optical path closest to the image side of the imaging optical lens assembly and the image surface to correct aberrations such as field curvature. The optical properties of the image correction unit, such as curvature, thickness, refractive index, position, and surface shape (convex or concave surface with spherical, aspherical, diffractive, or Fresnel types), can be adjusted according to the design of the image acquisition unit. In general, a preferred image correction unit is, for example, a thin transparent element having a concave object-side surface and a planar image-side surface, and the thin transparent element is arranged near the image surface.

[0061] According to the present disclosure, at least one light-deflecting element, such as a prism or a mirror, which may have a flat, spherical, aspherical, or free-form surface, may optionally be arranged between an imaged object and the image surface on the optical path for imaging, so that the optical lens assembly for imaging can be arranged more spatially flexibly and therefore the dimensions of an electronic device are not limited by the total path length of the optical lens assembly for imaging. See in particular Fig. 35 and Fig. 36. Fig. 35 shows a schematic view of a configuration of a light-directing element in an optical lens assembly for imaging according to an embodiment of the present disclosure, and Fig.36 shows a schematic view of another configuration of a light-directing element in an optical lens assembly for imaging according to an embodiment of the present disclosure. In Fig. 35 and Fig. 36, the optical lens assembly for imaging may comprise, in the order from an imaged object (not shown in the figures) to an image surface IMG along a beam path, a first optical axis OA1, a light-deflecting element LF, and a second optical axis OA2. The light-deflecting element LF may be arranged between the imaged object and a lens group LG of the optical lens assembly for imaging, as shown in Fig. 35, or between a lens group LG of the optical lens assembly for imaging and the image surface IMG, as shown in Fig. 36. Also see Fig.37, which shows a schematic view of a configuration of two light-directing elements in an optical lens assembly for imaging according to an embodiment of the present disclosure. In Fig.37, the imaging optical lens assembly may include, in the order from an imaged object (not shown in the figure) to an image surface IMG along a light path, a first optical axis OA1, a first light-deflecting element LF1, a second optical axis OA2, a second light-deflecting element LF2, and a third optical axis OA3. The first light-deflecting element LF1 is arranged between the imaged object and a lens group LG of the imaging optical lens assembly, the second light-deflecting element LF2 is arranged between the lens group LG of the imaging optical lens assembly and the image surface IMG, and the propagation direction of the light on the first optical axis OA1 may be the same direction as the propagation direction of the light on the third optical axis OA3, as shown in Fig.37. The optical lens assembly for imaging may optionally be provided with three or more light-directing elements, and the present disclosure is not limited to the type, number, and position of the light-directing elements of the embodiments disclosed in the aforementioned figures.

[0062] According to the present disclosure, the optical lens assembly for imaging may include at least one diaphragm, such as an aperture diaphragm, a diaphragm stop, or a field diaphragm stop. The diaphragm stop or the field diaphragm stop is configured to eliminate stray light and thereby improve the image quality thereof.

[0063] According to the present disclosure, an aperture stop can be configured as a front stop or a center stop. A front stop disposed between an imaged object and the first lens element can provide a greater distance between an exit pupil of the imaging optical lens assembly and the image surface to create a telecentric effect, thereby improving the image sensing efficiency of an image sensor (e.g., CCD or CMOS). A center stop disposed between the first lens element and the image surface is advantageous for increasing the viewing angle of the imaging optical lens assembly, thereby providing a wider field of view for the same.

[0064] According to the present disclosure, the optical lens assembly for imaging may include an aperture control unit. The aperture control unit may be a mechanical component or a light modulator that can control the size and shape of the aperture through electricity or electrical signals. The mechanical component may include a movable element, such as a blade assembly or a light-shielding film. The light modulator may include a shielding element, such as a filter, an electrochromic material, or a liquid crystal layer. The aperture control unit controls the amount of incident light or the exposure time to enhance the ability to adjust image quality. Furthermore, the aperture control unit may be the aperture stop of the present disclosure, which changes the f-number to achieve various imaging effects, such as depth of field or light intensity.

[0065] According to the present disclosure, the imaging optical lens assembly may include one or more optical elements for limiting the shape of light passing through the imaging optical lens assembly. Each optical element may be, but is not limited to, a filter, a polarizer, etc., and each optical element may be, but is not limited to, a single-piece element, a composite component, a thin film, etc. The optical element may be located on the object side or the image side of the imaging optical lens assembly, or between two adjacent lens elements to transmit light in a specific shape to meet application requirements.

[0066] According to the present disclosure, the optical lens assembly for imaging may include at least one optical lens element, an optical element, or a substrate having at least one surface with an anti-reflection layer. The anti-reflection layer can effectively reduce stray light resulting from light reflection at the interface. The anti-reflection layer may be disposed in an optically ineffective region of an object-side surface or an image-side surface of the optical lens element, or a connecting surface between the object-side surface and the image-side surface. The optical element may be a light-blocking element, an annular spacer element, a tube element, a cover glass, a blue glass, a filter, a color filter, a light path deflecting element, a prism, a mirror, etc.The carrier may be a base for holding a lens assembly, a microlens disposed on an image sensor, a substrate surrounding the image sensor, a glass plate for protecting the image sensor, etc.

[0067] According to the present disclosure, the object side and the image side are defined according to the direction of the optical axis, and the axial optical data is calculated along the optical axis. Furthermore, when the optical axis is deflected by a light deflecting element, the axial optical data is also calculated along the deflected optical axis.

[0068] In accordance with the above description of the present disclosure, the following specific embodiments are provided for further explanation. 1. Embodiment

[0069] Fig. 1 is a schematic view of an image acquisition unit according to the first embodiment of the present disclosure. Fig.Figure 2 shows, in order from left to right, spherical aberration curves, astigmatic field curves, and a distortion curve of the image acquisition unit according to the first embodiment. Fig.1, the image acquisition unit 1 includes the imaging optical lens assembly (the reference numeral of which is omitted) of the present disclosure and an image sensor IS. The imaging optical lens assembly includes, in order from an object side to an image side along an optical axis, a first lens element E1, a second lens element E2, a third lens element E3, an aperture stop ST, a fourth lens element E4, a fifth lens element E5, a sixth lens element E6, a seventh lens element E7, a filter E8, and an image surface IMG. The imaging optical lens assembly includes seven lens elements (E1, E2, E3, E4, E5, E6, and E7), and no additional lens element is disposed between each of the seven adjacent lens elements.

[0070] The first lens element E1 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 first lens element E1 is made of glass material and has both the object-side surface and the image-side surface spherical.

[0071] The second lens element E2 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 second lens element E2 is made of plastic material and has both the object-side and image-side surfaces aspherical.

[0072] The third lens element E3 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 third lens element E3 is made of glass material and has both the object-side and image-side surfaces spherical.

[0073] 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 convex in a paraxial region thereof. The fourth lens element E4 is made of plastic material and has both the object-side and image-side surfaces aspherical.

[0074] The fifth lens element E5 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 fifth lens element E5 is made of plastic and has both the object-side and image-side surfaces aspherical.

[0075] 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 material and has both the object-side surface and the image-side surface aspherical. The object-side surface of the sixth lens element E6 has an inflection point. The image-side surface of the sixth lens element E6 has an inflection point. The object-side surface of the sixth lens element E6 has a critical point in an off-axis region thereof. The image-side surface of the sixth lens element E6 has a critical point in an off-axis region thereof.

[0076] The seventh lens element E7 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 seventh lens element E7 is made of plastic material and has both the object-side surface and the image-side surface aspherical. The object-side surface of the seventh lens element E7 has two inflection points. The image-side surface of the seventh lens element E7 has two inflection points. The object-side surface of the seventh lens element E7 has a critical point in an off-axis region thereof. The image-side surface of the seventh lens element E7 has a critical point in an off-axis region thereof.

[0077] The E8 filter is made of glass and is located between the seventh lens element E7 and the image surface IMG. It does not affect the focal length of the imaging optical lens assembly. The image sensor IS is located on or near the image surface IMG of the imaging optical lens assembly.

[0078] In this embodiment, each of an Abbe number of the second lens element E2 and an Abbe number of the third lens element E3 is less than 40.0.

[0079] The equation of the aspherical surface profiles of the aforementioned lens elements of the first 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 an optical axis from an axial vertex on the aspherical surface to a point at a distance Y from the optical axis on the aspherical surface; Y is the vertical distance from the point on the aspherical surface to the optical axis; R is the radius of curvature; k is the conical coefficient; and Ai is the i-th aspherical coefficient, and in the embodiments, i may be 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28 and 30, but is not limited thereto.

[0080] In the imaging optical lens assembly of the image sensing unit 1 according to the first embodiment, when a focal length of the imaging optical lens assembly is f, an F-number of the imaging optical lens assembly is Fno, and half of a maximum field of view of the imaging optical lens assembly is HFOV, these parameters have the following values: f = 3.11 millimeters (mm), Fno = 2.80, and HFOV = 74.9 degrees (degrees).

[0081] When the maximum field of view of the imaging optical lens assembly is FOV, the following condition is met: FOV = 149.9 degrees.

[0082] When an axial distance between the object-side surface of the first lens element E1 and the image surface IMG is TL and a maximum image height of the optical lens assembly for imaging is ImgH, the following condition is satisfied: TL / ImgH = 3.04.

[0083] When an axial distance between the aperture stop ST and the image surface IMG is SL and the maximum image height of the optical lens assembly for imaging is ImgH, the following condition is satisfied: SL / ImgH = 1.44.

[0084] When the axial distance between the aperture stop ST and the image surface IMG is SL and the axial distance between the object-side surface of the first lens element E1 and the image surface IMG is TL, the following condition is satisfied: SL / TL = 0.47.

[0085] When an axial distance between the object-side surface of the first lens element E1 and the image-side surface of the seventh lens element E7 is TD and the focal length of the optical lens assembly for imaging is f, the following condition is satisfied: TD / f = 3.56.

[0086] When an axial distance between the image-side surface of the seventh lens element E7 and the image surface IMG is BL and the focal length of the optical lens assembly for imaging is f, the following condition is satisfied: BL / f = 0.37.

[0087] When the axial distance between the object-side surface of the first lens element E1 and the image surface IMG is TL and a central thickness of the second lens element E2 is CT2, the following condition is satisfied: TL / CT2 = 11.66.

[0088] When the axial distance between the object-side surface of the first lens element E1 and the image surface IMG is TL and a central thickness of the third lens element E3 is CT3, the following condition is satisfied: TL / CT3 = 5.55.

[0089] When the axial distance between the object-side surface of the first lens element E1 and the image surface IMG is TL and a radius of curvature of the image-side surface of the second lens element E2 is R4, the following condition is satisfied: TL / R4 = 2.78.

[0090] When a maximum value among the axial distances between each of all adjacent lens elements of the imaging optical lens assembly is ATmax and the focal length of the imaging optical lens assembly is f, the following condition is satisfied: ATmax / f = 0.45. In this embodiment, an axial distance between two adjacent lens elements is a distance in a paraxial region between two adjacent lens surfaces of the two adjacent lens elements. In this embodiment, an axial distance between the first lens element E1 and the second lens element E2 is greater than each of the axial distances between any other two adjacent lens elements of the imaging optical lens assembly, and ATmax is equal to the axial distance between the first lens element E1 and the second lens element E2.

[0091] When an entrance pupil diameter of the imaging optical lens assembly is EPD, the axial distance between the aperture stop ST and the image surface IMG is SL, the maximum image height of the imaging optical lens assembly is ImgH, and a central thickness of the fourth lens element is E4 CT4, the following condition is satisfied: (EPD × SL) / (ImgH × CT4) = 1.39.

[0092] When the focal length of the optical lens assembly for imaging is f and a combined focal length of the fifth lens element E5 and the sixth lens element E6 is f56, the following condition is satisfied: f / f56 = -0.69.

[0093] When the focal length of the imaging optical lens assembly is f and a radius of curvature of the object-side surface of the second lens element E2 is R3, the following condition is satisfied: f / R3 = -0.12.

[0094] When a combined focal length of the first lens element E1 and the second lens element E2 is f12 and the combined focal length of the fifth lens element E5 and the sixth lens element E6 is f56, the following condition is satisfied: f12 / f56 = 0.50.

[0095] When a compound focal length of the second lens element E2 and the third lens element E3 is f23 and a compound focal length of the fourth lens element E4 and the fifth lens element E5 is f45, the following condition is satisfied: f45 / f23 = 0.88.

[0096] When the combined focal length of the fourth lens element E4 and the fifth lens element E5 is f45, the central thickness of the fourth lens element E4 is CT4, a central thickness of the fifth lens element E5 is CT5, and an axial distance between the fourth lens element E4 and the fifth lens element E5 is T45, the following condition is satisfied: f45 / (CT4+T45+CT5) = 3.41.

[0097] When a combined focal length of the second lens element E2, the third lens element E3, the fourth lens element E4, and the fifth lens element E5 is f2345, the central thickness of the second lens element E2 is CT2, the central thickness of the third lens element E3 is CT3, and an axial distance between the second lens element E2 and the third lens element E3 is T23, the following condition is satisfied: f2345 / (CT2+T23+CT3) = 0.89.

[0098] When the radius of curvature of the object-side surface of the second lens element E2 is R3 and the radius of curvature of the image-side surface of the second lens element E2 is R4, the following condition is satisfied: (R3+R4) / (R3-R4) = 0.70.

[0099] When a radius of curvature of the object-side surface of the fourth lens element E4 is R7 and a focal length of the third lens element E3 is f3, the following condition is satisfied: R7 / f3 = 0.81.

[0100] When the axial distance between the aperture stop ST and the image surface IMG is SL and a composite focal length of the fourth lens element E4, the fifth lens element E5, the sixth lens element E6 and the seventh lens element E7 is f4567, the following condition is satisfied: SL / f4567 = 0.94.

[0101] When the axial distance between the first lens element E1 and the second lens element E2 is T12 and an axial distance between the fifth lens element E5 and the sixth lens element E6 is T56, the following condition is satisfied: T12 / T56 = 1.92.

[0102] When the axial distance between the fifth lens element E5 and the sixth lens element E6 is T56 and the central thickness of the fifth lens element E5 is CT5, the following condition is satisfied: T56 / CT5 = 1.47.

[0103] When an axial distance between the third lens element E3 and the fourth lens element E4 is T34, 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: (T34+CT4) / CT3 = 0.57.

[0104] When the axial distance between the object-side surface of the first lens element E1 and the image surface IMG is TL, the axial distance between the aperture stop ST and the image surface IMG is SL, and a combined focal length of the first lens element E1, the second lens element E2, and the third lens element E3 is f123, the following condition is satisfied: (TL-SL) / f123 = 0.25.

[0105] When the central thickness of the second lens element E2 is CT2, the central thickness of the third lens element E3 is CT3, the central thickness of the fourth lens element E4 is CT4, the central thickness of the fifth lens element E5 is CT5, the axial distance between the second lens element E2 and the third lens element E3 is T23, and the axial distance between the fourth lens element E4 and the fifth lens element E5 is T45, the following condition is satisfied: (CT2+T23+CT3) / (CT4+T45+CT5) = 1.97.

[0106] If an Abbe number of the fifth lens element is E5 V5, the following condition is satisfied: V5 = 19.5.

[0107] If an Abbe number of the seventh lens element E7 is V7, the following condition is satisfied: V7 = 25.6.

[0108] The detailed optical data of the first embodiment are shown in Table 1A and the aspherical surface data are shown in Table 1B below. TABLE 1A 1. Embodiment f = 3.11 mm, Fno = 2.80, HFOV = 74.9 degrees Surface # radius of curvature thickness material index Abbé # focal length 0 object infinity 1000,000 1 Lens 1 11,6289 (SPH) 1,394 Glass 1,804 46,6 -4,87 2 2,7709 (SPH) 1,414 3 Lens 2 -24,9354 (ASP) 1,049 plastic 1,650 21,8 -5,67 4 4,3925 (ASP) 0,148 5 Lens 3 4,0461 (SPH) 2,202 Glass 1,805 25,5 3,48 6 -6,8806 (SPH) 0,213 7 Aperture diaphragm Plano -0,120 8 Lens 4 2,8243 (ASP) 1,155 plastic 1,544 56,0 2,75 9 -2,7203 (ASP) 0,072 10 Lens 5 -5,6237 (ASP) 0,500 plastic 1,669 19,5 -3,99 11 5,2633 (ASP) 0,735 12 Lens 6 7,8432 (ASP) 0,858 plastic 1,544 56,0 35,92 13 12,5960 (ASP) 0,561 14 Lens 7 37,1470 (ASP) 0,891 plastic 1,614 25,6 -9,54 15 5,0100 (ASP) 0,800 16 filter Plano 0,210 Glass 1,517 64,2 - 17 Plano 0,146 18 Picture Plano - Note: The reference wavelength is 587.6 nm (d-line). TABLE 1B Aspherical coefficients Surface # 3 4 8 9 k = -9,89859E+01 -6,09571E+00 -1,01890E+00 -2,20775E-01 A4 = -1,464165776E-02 7,974908758E-03 6,391631302E-03 5,229311221E-03 A6 = 6,023508487E-03 1,408038575E-02 1,634900551E-02 -1,149235187E-01 A8 = -6,896481716E-03 -3,255796380E-02 -4,677425112E-02 7,684239389E-01 A10 = 5,918563037E-03 5,344519382E-02 6,678888416E-02 -2,658749585E+00 A12 = -3,173939168E-03 -5,342648163E-02 -5,047763190E-02 5,537163247E+00 A14 = 1,068724279E-03 3,308685672E-02 1,383459940E-02 -7,428653837E+00 A16 = -2,189005807E-04 -1,231388174E-02 - 6,439512348E+00 A18 = 2,487490232E-05 2,518889962E-03 - -3,484882331E+00 A20 = -1,200855011E-06 -2,169153278E-04 - 1,071473398E+00 A22 = - - - -1,430967747E-01 Surface # 10 11 12 13 k = -9,44509E+01 -8,43895E+01 -2,00927E+01 -2,33636E+01 A4 = -1,024453314E-01 6,393208227E-02 -5,723039520E-03 5,050226398E-03 A6 = 1,545115262E-01 -7,123360645E-02 -1,224627648E-03 -1,517873586E-03 A8 = -2,453558793E-01 1,084852891E-01 -8,715790605E-03 -9,415961803E-03 A10 = 2,746717017E-01 -1,244400527E-01 8,117326071E-03 9,220600546E-03 A12 = -2,269353559E-01 9,649416215E-02 1,881305674E-03 -4,407191831E-03 A14 = 1,097970427E-01 -4,808765372E-02 -7,975500582E-03 1,180262936E-03 A16 = -2,233048954E-02 1,395483425E-02 5,877731915E-03 -1,796486198E-04 A18 = - -1,782775167E-03 -2,085866123E-03 1,440629952E-05 A20 = - - 3,731125946E-04 -4,670251785E-07 A22 = - - -2,708325997E-05 - Surface # 14 15 k = -8,75370E+01 -7,34329E+00 A4 = -3,244322432E-02 -3,362925140E-02 A6 = 1,606815536E-02 1,530230058E-02 A8 = -5,438888787E-03 -6,325591404E-03 A10 = -1,715615223E-02 -1,951615483E-04 A12 = 3,120771364E-02 2,008645374E-03 A14 = -2,721168168E-02 -1,292541586E-03 A16 = 1,489052633E-02 4,598746251E-04 A18 = -5,500171744E-03 -1,064935288E-04 A20 = 1,406585315E-03 1,683764894E-05 A22 = -2,497886662E-04 -1,835674393E-06 A24 = 3,028903942E-05 1,358635216E-07 A26 = -2,396664147E-06 -6,519008871E-09 A28 = 1,117009592E-07 1,828370817E-10 A30 = -2,328132431E-09 -2,273917175E-12

[0109] Table 1A shows the radius of curvature, thickness, and focal length in millimeters (mm). Surface numbers 0-18 represent the surfaces arranged along the optical axis from the object side to the image side. In Table 1B, k represents the conic coefficient of the aspherical surface profile equation. A4-A30 represent the aspherical coefficients from the 4th to the 30th order. The tables shown below for each embodiment are the corresponding schematic parameter and aberration curves, and the definitions of the tables are the same as in Table 1A and Table 1B of the 1st embodiment. Therefore, explanations will not be repeated. 2. Embodiment

[0110] Fig. 3 is a schematic view of an image acquisition unit according to the second embodiment of the present disclosure. Fig.Figure 4 shows, in order from left to right, spherical aberration curves, astigmatic field curves, and a distortion curve of the image acquisition unit according to the second embodiment. Fig.3, the image acquisition unit 2 includes the imaging optical lens assembly (the reference numeral of which is omitted) of the present disclosure and an image sensor IS. The imaging optical lens assembly includes, in order from an object side to an image side along an optical axis, a first lens element E1, a second lens element E2, a third lens element E3, an aperture stop ST, a fourth lens element E4, a fifth lens element E5, a sixth lens element E6, a seventh lens element E7, a filter E8, and an image surface IMG. The imaging optical lens assembly includes seven lens elements (E1, E2, E3, E4, E5, E6, and E7), and no additional lens element is disposed between each of the seven adjacent lens elements.

[0111] The first lens element E1 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 first lens element E1 is made of plastic material and has both the object-side and image-side surfaces aspherical.

[0112] The second lens element E2 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 second lens element E2 is made of plastic material and has both the object-side and image-side surfaces aspherical.

[0113] The third lens element E3 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 third lens element E3 is made of glass material and has both the object-side and image-side surfaces aspherical.

[0114] 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 convex in a paraxial region thereof. The fourth lens element E4 is made of plastic material and has both the object-side and image-side surfaces aspherical.

[0115] The fifth lens element E5 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 fifth lens element E5 is made of plastic material and has both the object-side surface and the image-side surface aspherical.

[0116] 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 material and has both the object-side surface and the image-side surface aspherical. The object-side surface of the sixth lens element E6 has an inflection point. The image-side surface of the sixth lens element E6 has an inflection point. The object-side surface of the sixth lens element E6 has a critical point in an off-axis region thereof. The image-side surface of the sixth lens element E6 has a critical point in an off-axis region thereof.

[0117] The seventh lens element E7 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 seventh lens element E7 is made of plastic material and has both the object-side surface and the image-side surface aspherical. The object-side surface of the seventh lens element E7 has two inflection points. The image-side surface of the seventh lens element E7 has two inflection points. The object-side surface of the seventh lens element E7 has a critical point in an off-axis region thereof. The image-side surface of the seventh lens element E7 has a critical point in an off-axis region thereof.

[0118] The E8 filter is made of glass and is located between the seventh lens element E7 and the image surface IMG. It does not affect the focal length of the imaging optical lens assembly. The image sensor IS is located on or near the image surface IMG of the imaging optical lens assembly.

[0119] In this embodiment, each value of an Abbe number of the second lens element E2 and an Abbe number of the third lens element E3 is less than 40.0.

[0120] The detailed optical data of the 2nd embodiment are shown in Table 2A and the aspherical surface data are shown in Table 2B below. TABLE 2A 2. Embodiment f = 3.48 mm, Fno = 2.80, HFOV = 74.7 degrees Surface # radius of curvature thickness material index Abbé # focal length 0 object infinity 1000,000 1 Lens 1 31,0447 (ASP) 0,843 plastic 1,544 56,0 -6,22 2 3,0221 (ASP) 1,145 3 Lens 2 -58,8235 (ASP) 0,823 plastic 1,650 21,8 -6,43 4 4,5238 (ASP) 0,165 5 Lens 3 4,4055 (ASP) 2,164 Glass 1,741 27,8 3,73 6 -5,8765 (ASP) 0,178 7 Aperture diaphragm Plano -0,117 8 Lens 4 2,9274 (ASP) 1,166 plastic 1,544 56,0 2,77 9 -2,6743 (ASP) 0,053 10 Lens 5 -5,2323 (ASP) 0,500 plastic 1,660 20,4 -4,12 11 5,8768 (ASP) 0,779 12 Lens 6 10,8708 (ASP) 0,789 plastic 1,544 56,0 -69,70 13 8,2327 (ASP) 0,464 14 Lens 7 13,3005 (ASP) 1,012 plastic 1,584 28,2 -10,96 15 4,2009 (ASP) 0,800 16 filter Plano 0,210 Glass 1,517 64,2 - 17 Plano 0,141 18 Picture Plano - Note: The reference wavelength is 587.6 nm (d-line). TABLE 2B Aspherical coefficients Surface # 1 2 3 4 k = 9,98449E+00 2,90622E-02 -9,67102E+01 -5,91263E+00 A4 = -8,481439626E-05 -7,101592711E-04 -1,557971226E-02 3,871679182E-03 A6 = 2,031796485E-05 1,297862892E-03 9,251270871E-03 3,132860343E-02 A8 = 6,941086136E-08 -7,361650854E-04 -1,091160672E-02 -5,540349038E-02 A10 = -3,491887629E-07 1,969740156E-04 8,094562395E-03 6,163210841E-02 A12 = 2,637599729E-08 -3,111389060E-05 -3,690074271E-03 -4,587260725E-02 A14 = -4,955265721E-10 2,707375888E-06 1,087811166E-03 2,386562498E-02 A16 = - - -2,046252800E-04 -8,158812506E-03 A18 = - - 2,238331577E-05 1,595370254E-03 A20 = - - -1,080775191E-06 -1,311967542E-04 Surface # 5 6 8 9 k = 1,86645E-01 3,21987E-01 -9,26696E-01 -1,59640E-01 A4 = -1,769801143E-03 2,861926285E-03 1,267451435E-02 1,561664618E-02 A6 = 1,184617963E-02 -1,031061361E-02 -1,196577295E-02 -1,792208970E-01 A8 = -1,924172893E-02 1,452109748E-02 1,407650849E-02 1,040801754E+00 A10 = 1,402507405E-02 -1,051120477E-02 -1,105565793E-02 -3,482020052E+00 A12 = -4,918575078E-03 3,419103506E-03 3,999423256E-03 7,180102149E+00 A14 = 6,762422415E-04 -1,978142447E-04 -1,688080118E-03 -9,592065093E+00 A16 = - - - 8,330256940E+00 A18 = - - - -4,547161266E+00 A20 = - - - 1,418486446E+00 A22 = - - - -1,929642141E-01 Surface # 10 11 12 13 k = -9,65393E+01 -8,61589E+01 -1,95334E+01 -2,62845E+01 A4 = -1,025151120E-01 5,823074734E-02 -1,161303812E-02 5,021362197E-03 A6 = 1,592915755E-01 -4,445010219E-02 2,634679710E-02 6,016484780E-03 A8 = -2,621010861E-01 4,242184271E-02 -7,145455964E-02 -1,856876968E-02 A10 = 2,823556860E-01 -2,528823425E-02 8,682871995E-02 1,439020100E-02 A12 = -2,022086088E-01 4,196025512E-03 -6,064934477E-02 -6,104304618E-03 A14 = 8,148218950E-02 4,086760839E-03 2,490593901E-02 1,539866706E-03 A16 = -1,381165359E-02 -2,443721946E-03 -5,532509344E-03 -2,315831384E-04 A18 = - 4,114742768E-04 4,106142147E-04 1,922714989E-05 A20 = - - 6,452566145E-05 -6,790901681E-07 A22 = - - -1,096412108E-05 - Surface # 14 15 k = -1,95676E+01 -6,02814E+00 A4 = -3,653822816E-02 -3,201389683E-02 A6 = 2,478132852E-02 1,183537092E-02 A8 = -3,069915180E-02 -5,912031684E-03 A10 = 2,720819189E-02 1,859371090E-03 A12 = -1,694176314E-02 7,605435925E-05 A14 = 7,750509525E-03 -3,647323081E-04 A16 = -2,879023815E-03 1,753531401E-04 A18 = 9,355742052E-04 -4,704304676E-05 A20 = -2,562243525E-04 8,203554395E-06 A22 = 5,292778293E-05 -9,673860162E-07 A24 = -7,457408732E-06 7,691564405E-08 A26 = 6,569817837E-07 -3,964423367E-09 A28 = -3,199646241E-08 1,199479007E-10 A30 = 6,424313492E-10 -1,621012254E-12

[0121] In Embodiment 2, the equation for the aspherical surface profiles of the aforementioned lens elements is the same as that of Embodiment 1. The definitions of these parameters shown in Table 2C are also the same as those given in Embodiment 1, with corresponding values ​​for Embodiment 2, so explanation thereof will not be repeated.

[0122] In addition, these parameters can be calculated from Table 2A and Table 2B as the following values ​​and satisfy the following conditions: TABLE 2C Schematic parameters f [mm] 3,48 f / R3 -0,06 Fno 2,80 f12 / f56 0,76 HFOV [degree] 74,7 f45 / f23 0,86 FOV [degrees] 149,4 f45 / (CT4+T45+CT5) 3,44 TL / lmgH 2,76 f2345 / (CT2+T23+CT3) 0,98 SL / lmgH 1,44 (R3+R4) / (R3-R4) 0,86 SL / TL 0,52 R7 / f3 0,78 TD / f 2,86 SL / f4567 0,81 BL / f 0,33 T12 / T56 1,47 TL / CT2 13,51 T56 / CT5 1,56 TL / CT3 5,14 (T34+CT4) / CT3 0,57 TL / R4 2,46 (TL-SL) / f123 0,29 ATmax / f 0,33 (CT2+T23+CT3) / (CT4+T45+CT5) 1,83 (EPD×SL) / (lmgH×CT4) 1,54 V5 20,4 f / f56 -0,93 V7 28,2 3. Embodiment

[0123] Fig. 5 is a schematic view of an image acquisition unit according to the 3rd embodiment of the present disclosure. Fig. Figure 6 shows, in order from left to right, spherical aberration curves, astigmatic field curves, and a distortion curve of the image acquisition unit according to the third embodiment. Fig. 5, the image acquisition unit 3 includes the imaging optical lens assembly (the reference numeral of which is omitted) of the present disclosure and an image sensor IS. The imaging optical lens assembly includes, in order from an object side to an image side along an optical axis, a first lens element E1, a second lens element E2, a third lens element E3, an aperture stop ST, a fourth lens element E4, a fifth lens element E5, a sixth lens element E6, a seventh lens element E7, a filter E8, and an image surface IMG. The imaging optical lens assembly includes seven lens elements (E1, E2, E3, E4, E5, E6, and E7), and no additional lens element is disposed between each of the seven adjacent lens elements.

[0124] The first lens element E1 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 first lens element E1 is made of glass material and has both the object-side and image-side surfaces aspherical. The object-side surface of the first lens element E1 has an inflection point.

[0125] The second lens element E2 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 second lens element E2 is made of plastic material and has both the object-side surface and the image-side surface aspherical. The object-side surface of the second lens element E2 has two inflection points. The object-side surface of the second lens element E2 has a critical point in an off-axis region thereof.

[0126] The third lens element E3 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 third lens element E3 is made of glass material and has both the object-side and image-side surfaces aspherical.

[0127] 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 convex in a paraxial region thereof. The fourth lens element E4 is made of plastic material and has both the object-side and image-side surfaces aspherical.

[0128] The fifth lens element E5 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 fifth lens element E5 is made of plastic and has both the object-side and image-side surfaces aspherical.

[0129] 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 material and has both the object-side surface and the image-side surface aspherical. The object-side surface of the sixth lens element E6 has an inflection point. The image-side surface of the sixth lens element E6 has an inflection point. The object-side surface of the sixth lens element E6 has a critical point in an off-axis region thereof. The image-side surface of the sixth lens element E6 has a critical point in an off-axis region thereof.

[0130] The seventh lens element E7 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 seventh lens element E7 is made of plastic material and has both the object-side surface and the image-side surface aspherical. The object-side surface of the seventh lens element E7 has two inflection points. The image-side surface of the seventh lens element E7 has two inflection points. The object-side surface of the seventh lens element E7 has a critical point in an off-axis region thereof. The image-side surface of the seventh lens element E7 has a critical point in an off-axis region thereof.

[0131] The E8 filter is made of glass and is located between the seventh lens element E7 and the image surface IMG. It does not affect the focal length of the imaging optical lens assembly. The image sensor IS is located on or near the image surface IMG of the imaging optical lens assembly.

[0132] In this embodiment, each value of an Abbe number of the second lens element E2, an Abbe number of the third lens element E3, and an Abbe number of the sixth lens element E6 is less than 40.0.

[0133] The detailed optical data of the third embodiment are shown in Table 3A and the aspherical surface data are shown in Table 3B below. TABLE 3A 3. Embodiment f = 3.22 mm, Fno = 2.80, HFOV = 74.9 degrees Surface # radius of curvature thickness material index Abbé # focal length 0 object infinity 1000,000 1 Lens 1 -76,5476 (ASP) 1,496 Glass 1,697 56,2 -4,58 2 3,3553 (ASP) 1,068 3 Lens 2 24,4281 (ASP) 0,813 plastic 1,660 20,4 -6,86 4 3,7676 (ASP) 0,135 5 Lens 3 3,6536 (ASP) 2,212 Glass 1,805 25,5 3,44 6 -8,3818 (ASP) 0,186 7 Aperture diaphragm Plano -0,110 8 Lens 4 2,7225 (ASP) 1,148 plastic 1,535 55,9 2,79 9 -2,8149 (ASP) 0,104 10 Lens 5 -6,5829 (ASP) 0,509 plastic 1,657 21,3 -4,03 11 4,5558 (ASP) 0,886 12 Lens 6 8,1280 (ASP) 0,669 plastic 1,639 23,5 101,93 13 8,9898 (ASP) 0,386 14 Lens 7 7,6644 (ASP) 1,029 plastic 1,680 18,2 -13,97 15 4,0114 (ASP) 0,781 16 filter Plano 0,210 Glass 1,517 64,2 - 17 Plano 0,129 18 Picture Plano - Note: The reference wavelength is 587.6 nm (d-line). TABLE 3B Aspherical coefficients Surface # 1 2 3 4 k = -9,06222E+01 -1,61749E-01 9,89160E+01 -5,56404E+00 A4 = 9,293699998E-05 -1,298941069E-03 -1,376067548E-02 1,389824019E-02 A6 = -2,650962601E-05 1,743740541E-03 4,928936606E-03 -4,151704673E-03 A8 = 1,089179831E-05 -1,739774493E-03 -8,800276534E-03 -8,620215884E-04 A10 = -1,636274316E-06 8,715007479E-04 1,089428364E-02 1,894624845E-02 A12 = 1,065379373E-07 -2,062862641 E-04 -7,562621517E-03 -2,919952220E-02 A14 = -2,476093857E-09 1,877767357E-05 3,072836201E-03 2,196667026E-02 A16 = - - -7,282137480E-04 -9,067797319E-03 A18 = - - 9,320292592E-05 1,971556338E-03 A20 = - - -4,960659043E-06 -1,764862841E-04 Surface # 5 6 8 9 k = 6,72210E-02 1,00625E-01 -9,02540E-01 -2,12617E-01 A4 = 1,030754827E-03 3,148976696E-03 1,260815469E-02 1,263961252E-02 A6 = -4,242736914E-03 -4,511738955E-03 6,163852386E-03 -2,526833544E-01 A8 = 5,123373305E-03 -3,205764365E-03 -4,945752065E-02 1,720295752E+00 A10 = -3,205736174E-03 1,230413710E-02 9,244646047E-02 -6,321984276E+00 A12 = 1,071165791E-03 -1,126611924E-02 -8,475805675E-02 1,440565677E+01 A14 = -1,411859336E-04 3,541565535E-03 2,885538327E-02 -2,135513996E+01 A16 = - - - 2,051221216E+01 A18 = - - - -1,227989143E+01 A20 = - - - 4,156034848E+00 A22 = - - - -6,063149379E-01 Surface # 10 11 12 13 k = -9,59712E+01 -8,77377E+01 -3,99287E+01 -4,18873E+01 A4 = -9,898821958E-02 7,642243687E-02 -9,546976507E-03 1,471413877E-02 A6 = 1,046483057E-01 -1,408245162E-01 1,040355024E-02 -2,582788002E-02 A8 = -5,442217898E-02 2,746856125E-01 -7,551634547E-03 2,340464200E-02 A10 = -6,289909592E-02 -3,566385793E-01 -3,143414363E-02 -1,632245188E-02 A12 = 9,000595080E-02 3,006318235E-01 5,893156161E-02 7,458766974E-03 A14 = -4,511218700E-02 -1,589375177E-01 -4,744596358E-02 -2,145738896E-03 A16 = 8,806362535E-03 4,788814659E-02 2,140903200E-02 3,704412111E-04 A18 = - -6,252066577E-03 -5,633963488E-03 -3,493947346E-05 A20 = - - 8,114893092E-04 1,382159054E-06 A22 = - - -4,970919572E-05 - Surface # 14 15 k = -3,63387E+01 -1,07771E+01 A4 = -2,673237539E-02 -9,058272953E-03 A6 = 6,593776981E-02 -8,916439638E-03 A8 = -2,605719004E-01 -1,508438665E-02 A10 = 4,890551918E-01 3,155147865E-02 A12 = -5,602332450E-01 -2,633131273E-02 A14 = 4,318442470E-01 1,331056846E-02 A16 = -2,330919651E-01 -4,501337927E-03 A18 = 8,952664126E-02 1,056231439E-03 A20 = -2,453835792E-02 -1,741535437E-04 A22 = 4,756363057E-03 2,010767744E-05 A24 = -6,361226899E-04 -1,591673271E-06 A26 = 5,580212442E-05 8,229386148E-08 A28 = -2,888443040E-06 -2,503584080E-09 A30 = 6,685805490E-08 3,399293149E-11

[0134] In the third embodiment, the equation for the aspherical surface profiles of the aforementioned lens elements is the same as the equation for the first embodiment. The definitions of these parameters, shown in Table 3C, are also the same as those given in the first embodiment, with corresponding values ​​for the third embodiment, so explanations will not be repeated.

[0135] In addition, these parameters can be calculated from Table 3A and Table 3B as the following values ​​and satisfy the following conditions: TABLE 3C Schematic parameters f [mm] 3,22 f / R3 0,13 Fno 2,80 f12 / f56 0,58 HFOV [degree] 74,9 f45 / f23 0,95 FOV [degrees] 149,7 f45 / (CT4+T45+CT5) 3,31 TL / lmgH 2,90 f2345 / (CT2+T23+CT3) 0,94 SL / lmgH 1,43 (R3+R4) / (R3-R4) 1,36 SL / TL 0,49 R7 / f3 0,79 TD / f 3,27 SL / f4567 0,98 BL / f 0,35 T12 / T56 1,21 TL / CT2 14,33 T56 / CT5 1,74 TL / CT3 5,27 (T34+CT4) / CT3 0,55 TL / R4 3,09 (TL-SL) / f123 0,20 ATmax / f 0,33 (CT2+T23+CT3) / (CT4+T45+CT5) 1,79 (EPD×SL) / (lmgH×CT4) 1,44 V5 21,3 f / f56 -0,78 V7 18,2 4. Embodiment

[0136] Fig. 7 is a schematic view of an image acquisition unit according to the 4th embodiment of the present disclosure. Fig.Figure 8 shows, in order from left to right, spherical aberration curves, astigmatic field curves, and a distortion curve of the image acquisition unit according to the fourth embodiment. Fig.7, the image acquisition unit 4 includes the imaging optical lens assembly (the reference numeral of which is omitted) of the present disclosure and an image sensor IS. The imaging optical lens assembly includes, in order from an object side to an image side along an optical axis, a first lens element E1, a second lens element E2, a stop S1, a third lens element E3, an aperture stop ST, a fourth lens element E4, a stop S2, a fifth lens element E5, a sixth lens element E6, a seventh lens element E7, a filter E8, and an image surface IMG. The imaging optical lens assembly includes seven lens elements (E1, E2, E3, E4, E5, E6, and E7), and no additional lens element is disposed between each of the seven adjacent lens elements.

[0137] The first lens element E1 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 first lens element E1 is made of glass material and has both the object-side surface and the image-side surface spherical.

[0138] The second lens element E2 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 second lens element E2 is made of plastic material and has both the object-side surface and the image-side surface aspherical. The object-side surface of the second lens element E2 has one inflection point. The image-side surface of the second lens element E2 has two inflection points. The object-side surface of the second lens element E2 has a critical point in an off-axis region thereof.

[0139] The third lens element E3 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 third lens element E3 is made of glass material and has both the object-side and image-side surfaces spherical.

[0140] 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 convex in a paraxial region thereof. The fourth lens element E4 is made of plastic material and has both the object-side and image-side surfaces aspherical.

[0141] The fifth lens element E5 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 fifth lens element E5 is made of plastic and has both the object-side and image-side surfaces aspherical.

[0142] 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 material and has both the object-side surface and the image-side surface aspherical. The object-side surface of the sixth lens element E6 has one inflection point. The image-side surface of the sixth lens element E6 has three inflection points. The object-side surface of the sixth lens element E6 has a critical point in an off-axis region thereof. The image-side surface of the sixth lens element E6 has a critical point in an off-axis region thereof.

[0143] The seventh lens element E7 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 seventh lens element E7 is made of plastic material and has both the object-side surface and the image-side surface aspherical. The object-side surface of the seventh lens element E7 has three inflection points. The image-side surface of the seventh lens element E7 has one inflection point. The object-side surface of the seventh lens element E7 has a critical point in an off-axis region thereof. The image-side surface of the seventh lens element E7 has a critical point in an off-axis region thereof.

[0144] The E8 filter is made of glass and is located between the seventh lens element E7 and the image surface IMG. It does not affect the focal length of the imaging optical lens assembly. The image sensor IS is located on or near the image surface IMG of the imaging optical lens assembly.

[0145] In this embodiment, each value of an Abbe number of the second lens element E2 and an Abbe number of the third lens element E3 is less than 40.0.

[0146] The detailed optical data of the fourth embodiment are shown in Table 4A and the aspherical surface data are shown in Table 4B below. TABLE 4A 4. Embodiment f = 3.42 mm, Fno = 2.40, HFOV = 75.0 degrees Surface # radius of curvature thickness material index Abbé # focal length 0 object infinity 1000,000 1 Lens 1 19,0964 (SPH) 0,750 Glass 1,804 46,6 -4,98 2 3,2546 (SPH) 1,254 3 Lens 2 16,4167 (ASP) 0,657 plastic 1,669 19,5 -40,31 4 10,0408 (ASP) 0,300 5 aperture Plano -0,118 6 Lens 3 7,8879 (SPH) 2,642 Glass 1,613 37,0 5,78 7 -5,6152 (SPH) 1,231 8 Aperture diaphragm Plano -0,062 9 Lens 4 3,2612 (ASP) 0,994 plastic 1,534 56,0 3,78 10 -4,7579 (ASP) -0,120 11 aperture Plano 0,211 12 Lens 5 -104,6689 (ASP) 0,450 plastic 1,660 20,4 -6,17 13 4,2412 (ASP) 0,635 14 Lens 6 5,9366 (ASP) 0,617 plastic 1,551 44,8 13,68 15 26,9784 (ASP) 1,325 16 Lens 7 3,2304 (ASP) 0,500 plastic 1,566 37,4 -7,66 17 1,7472 (ASP) 0,800 18 filter Plano 0,210 Glass 1,517 64,2 - 19 Plano 0,228 20 Picture Plano - Note: The reference wavelength is 587.6 nm (d-line). The effective radius of aperture S1 (surface 5) is 2.229 mm. The effective radius of aperture S2 (surface 11) is 1.078 mm. TABLE 4B Aspherical coefficients Surface # 3 4 9 10 k = 2,80312E+01 0,00000E+00 0,00000E+00 0,00000E+00 A4 = 5,193292653E-03 1,000292901E-02 7,189875061E-03 -4,406329934E-02 A6 = -2,173583524E-03 -1,478541330E-03 -2,022629055E-03 5,195292643E-02 A8 = 2,356300421E-04 -2,500627432E-04 1,682482338E-02 2,697802637E-01 A10 = -1,423258206E-04 -1,213406426E-05 -6,965712958E-02 -1,572066016E+00 A12 = 2,956607523E-05 9,115926230E-06 1,431466271E-01 4,083663817E+00 A14 = -2,081200183E-06 4,145319280E-06 -1,720449441E-01 -6,603332180E+00 A16 = 2,500881968E-08 -1,174980193E-06 1,199860493E-01 7,115082212E+00 A18 = - 7,832056674E-08 -4,522835531E-02 -5,140436699E+00 A20 = - - 7,103914028E-03 2,400029661E+00 A22 = - - - -6,548865848E-01 A24 = - - - 7,917008408E-02 Surface # 12 13 14 15 k = -8,72011E+00 -9,00000E+01 1,72851E+00 -6,16885E-01 A4 = -1,064951635E-01 8,418901979E-02 -3,460114116E-02 -3,261627247E-02 A6 = 1,859717774E-01 -2,785229214E-01 7,081970610E-02 4,859220460E-02 A8 = -3,201352214E-01 7,827447794E-01 -1,232874872E-01 -5,149417569E-02 A10 = 4,119911632E-01 -1,605808033E+00 1,708041314E-01 4,877204628E-02 A12 = -3,939269171E-01 2,287321722E+00 -1,739007420E-01 -3,588435279E-02 A14 = 2,766086624E-01 -2,211584560E+00 1,265142114E-01 1,941759468E-02 A16 = -1,390425854E-01 1,420717506E+00 -6,510656827E-02 -7,487618382E-03 A18 = 4,562309163E-02 -5,820037594E-01 2,340267646E-02 2,016472578E-03 A20 = -7,242965040E-03 1,397451655E-01 -5,735221948E-03 -3,735227262E-04 A22 = - -1,613397989E-02 9,120359222E-04 4,650477804E-05 A24 = - 4,271029899E-04 -8,472427365E-05 -3,714442809E-06 A26 = - - 3,484304066E-06 1,719636808E-07 A28 = - - - -3,510632543E-09 Surface # 16 17 k = -4,34287E+01 -8,67675E+00 A4 = -2,727515107E-02 7,354704644E-03 A6 = -1,790722597E-01 -1,189916689E-01 A8 = 2,960585168E-01 1,666543528E-01 A10 = -3,170961937E-01 -1,448181600E-01 A12 = 2,320593402E-01 8,590582957E-02 A14 = -1,168790190E-01 -3,596289173E-02 A16 = 4,085484090E-02 1,082712267E-02 A18 = -9,946279582E-03 -2,366389459E-03 A20 = 1,677509315E-03 3,753793813E-04 A22 = -1,920332895E-04 -4,272123177E-05 A24 = 1,423433389E-05 3,394869773E-06 A26 = -6,161957291E-07 -1,786244184E-07 A28 = 1,182545475E-08 5,585078766E-09 A30 = - -7,847237494E-11

[0147] In the fourth embodiment, the equation for the aspherical surface profiles of the aforementioned lens elements is the same as the equation for the first embodiment. The definitions of these parameters shown in Table 4C are also the same as those given in the first embodiment, with corresponding values ​​for the fourth embodiment, so explanations regarding them will not be repeated.

[0148] In addition, these parameters can be calculated from Table 4A and Table 4B as the following values ​​and satisfy the following conditions: TABLE 4C Schematic parameters f [mm] 3,42 f / R3 0,21 Fno 2,40 f12 / f56 0,35 HFOV [degree] 75,0 f45 / f23 1,12 FOV [degrees] 149,9 f45 / (CT4+T45+CT5) 4,85 TL / lmgH 3,11 f2345 / (CT2+T23+CT3) 1,10 SL / lmgH 1,44 (R3+R4) / (R3-R4) 4,15 SL / TL 0,46 R7 / f3 0,56 TD / f 3,29 SL / f4567 0,91 BL / f 0,36 T12 / T56 1,97 TL / CT2 19,03 T56 / CT5 1,41 TL / CT3 4,73 (T34+CT4) / CT3 0,82 TL / R4 1,25 (TL-SL) / f123 0,25 ATmax / f 0,39 (CT2+T23+CT3) / (CT4+T45+CT5) 2,27 (EPD×SL) / (lmgH×CT4) 2,07 V5 20,4 f / f56 -0,28 V7 37,4 5. Embodiment

[0149] Fig. 9 is a schematic view of an image acquisition unit according to the 5th embodiment of the present disclosure. Fig.Figure 10 shows, in order from left to right, spherical aberration curves, astigmatic field curves, and a distortion curve of the image acquisition unit according to the fifth embodiment. Fig.9, the image acquisition unit 5 includes the imaging optical lens assembly (the reference numeral of which is omitted) of the present disclosure and an image sensor IS. The imaging optical lens assembly includes, in order from an object side to an image side along an optical axis, a first lens element E1, a second lens element E2, a third lens element E3, an aperture stop ST, a fourth lens element E4, a fifth lens element E5, a sixth lens element E6, a seventh lens element E7, a filter E8, and an image surface IMG. The imaging optical lens assembly includes seven lens elements (E1, E2, E3, E4, E5, E6, and E7), and no additional lens element is disposed between each of the seven adjacent lens elements.

[0150] The first lens element E1 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 first lens element E1 is made of glass material and has both the object-side surface and the image-side surface spherical.

[0151] The second lens element E2 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 second lens element E2 is made of plastic material and has both the object-side surface and the image-side surface aspherical. The object-side surface of the second lens element E2 has two inflection points. The object-side surface of the second lens element E2 has a critical point in an off-axis region thereof.

[0152] The third lens element E3 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 third lens element E3 is made of glass material and has both the object-side and image-side surfaces spherical.

[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 convex in a paraxial region thereof. The fourth lens element E4 is made of plastic material and has both the object-side and image-side surfaces aspherical. The object-side surface of the fourth lens element E4 has an inflection point.

[0154] The fifth lens element E5 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 fifth lens element E5 is made of plastic and has both the object-side and image-side surfaces aspherical.

[0155] 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 material and has both the object-side surface and the image-side surface aspherical. The object-side surface of the sixth lens element E6 has an inflection point. The image-side surface of the sixth lens element E6 has an inflection point. The object-side surface of the sixth lens element E6 has a critical point in an off-axis region thereof. The image-side surface of the sixth lens element E6 has a critical point in an off-axis region thereof.

[0156] The seventh lens element E7 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 seventh lens element E7 is made of plastic material and has both the object-side surface and the image-side surface aspherical. The object-side surface of the seventh lens element E7 has two inflection points. The image-side surface of the seventh lens element E7 has one inflection point. The object-side surface of the seventh lens element E7 has a critical point in an off-axis region thereof. The image-side surface of the seventh lens element E7 has a critical point in an off-axis region thereof.

[0157] The E8 filter is made of glass and is located between the seventh lens element E7 and the image surface IMG. It does not affect the focal length of the imaging optical lens assembly. The image sensor IS is located on or near the image surface IMG of the imaging optical lens assembly.

[0158] In this embodiment, each value of an Abbe number of the second lens element E2 and an Abbe number of the third lens element E3 is less than 40.0.

[0159] The detailed optical data of the 5th embodiment are shown in Table 5A and the aspherical surface data are shown in Table 5B below. TABLE 5A 5. Embodiment f = 3.32 mm, Fno = 2.80, HFOV = 83.2 degrees Surface # radius of curvature thickness material index Abbé # focal length 0 object infinity 1000,000 1 Lens 1 27,1408 (SPH) 0,800 Glass 1,804 46,5 -3,92 2 2,7895 (SPH) 1,036 3 Lens 2 13,7486 (ASP) 0,700 plastic 1,660 20,4 -7,91 4 3,7063 (ASP) 0,141 5 Lens 3 3,9399 (SPH) 2,259 Glass 1,805 25,5 3,40 6 -6,6928 (SPH) 0,404 7 Aperture diaphragm Plano -0,118 8 Lens 4 2,9846 (ASP) 1,075 plastic 1,544 56,0 2,81 9 -2,7372 (ASP) 0,050 10 Lens 5 -5,7282 (ASP) 0,500 plastic 1,669 19,5 -4,13 11 5,5372 (ASP) 0,665 12 Lens 6 5,4452 (ASP) 0,757 plastic 1,544 56,0 -171,23 13 4,8925 (ASP) 0,582 14 Lens 7 9,7574 (ASP) 1,289 plastic 1,660 20,4 -13,75 15 4,4546 (ASP) 0,800 16 filter Plano 0,210 Glass 1,517 64,2 - 17 Plano 0,160 18 Picture Plano - Note: The reference wavelength is 587.6 nm (d-line). TABLE 5B Aspherical coefficients Surface # 3 4 8 9 k = -6,65713E+01 -6,09055E+00 -2,91780E+00 -6,17404E-01 A4 = -1,100157335E-02 1,075529494E-02 1,898601664E-02 -2,416787333E-02 A6 = 1,195138237E-03 -2,922038888E-03 -2,223836595E-02 1,078058431E-01 A8 = -1,214129136E-03 7,481581045E-03 5,874229516E-02 -4,054770734E-01 A10 = 1,199962720E-03 -9,817727078E-03 -9,839433354E-02 1,226202969E+00 A12 = -8,194948223E-04 8,038049424E-03 7,550298581E-02 -2,753118560E+00 A14 = 3,410134384E-04 -4,246654735E-03 -2,461180184E-02 4,072692853E+00 A16 = -8,270963747E-05 1,433462030E-03 - -3,876741931E+00 A18 = 1,081306110E-05 -2,804498851E-04 - 2,284561800E+00 A20 = -5,857475247E-07 2,422643682E-05 - -7,567257530E-01 A22 = - - - 1,074724842E-01 Surface # 10 11 12 13 k = -9,81240E+01 -9,00000E+01 -8,37472E+00 -5,90644E+00 A4 = -9,833700843E-02 5,845994208E-02 -1,218793773E-02 -2,771706938E-04 A6 = 1,589672792E-01 -6,062975941E-02 1,699201716E-02 -2,257899240E-03 A8 = -2,214025027E-01 9,649587694E-02 -6,211350091E-02 -4,230785111E-03 A10 = 2,147402914E-01 -1,065055861E-01 9,327164086E-02 3,686606965E-03 A12 = -1,678831840E-01 7,914513933E-02 -8,449993850E-02 -1,455151331E-03 A14 = 8,075781874E-02 -3,930935562E-02 4,962219125E-02 3,103536497E-04 A16 = -1,589242905E-02 1,191655596E-02 -1,906416612E-02 -3,537870669E-05 A18 = - -1,629156913E-03 4,623171429E-03 1,714575492E-06 A20 = - - -6,409352857E-04 -4,375700361E-09 A22 = - - 3,849413099E-05 - Surface # 14 15 k = -9,21455E+01 -2,09375E+01 A4 = -2,224810643E-02 -1,032104565E-02 A6 = 8,166163811E-03 -1,817097714E-03 A8 = -1,640644448E-02 1,251602002E-03 A10 = 2,652538837E-02 -1,622691319E-05 A12 = -2,690575371E-02 -2,462642000E-04 A14 = 1,798212975E-02 1,215383019E-04 A16 = -8,297448266E-03 -3,161301484E-05 A18 = 2,702581150E-03 5,206867346E-06 A20 = -6,235754238E-04 -5,670281128E-07 A22 = 1,006918001E-04 4,046137769E-08 A24 = -1,104976186E-05 -1,786475029E-09 A26 = 7,794050195E-07 4,167341959E-11 A28 = -3,161521035E-08 -2,448696421E-13 A30 = 5,550249573E-10 -5,305285457E-15

[0160] In the 5th embodiment, the equation for the aspherical surface profiles of the aforementioned lens elements is the same as the equation for the 1st embodiment. The definitions of these parameters shown in Table 5C are also the same as those given in the 1st embodiment, with corresponding values ​​for the 5th embodiment, so explanations regarding them will not be repeated.

[0161] In addition, these parameters can be calculated from Table 5A and Table 5B as the following values ​​and satisfy the following conditions: TABLE 5C Schematic parameters f [mm] 3,32 f / R3 0,24 Fno 2,80 f12 / f56 0,61 HFOV [degree] 83,2 f45 / f23 1,15 FOV [degrees] 166,3 f45 / (CT4+T45+CT5) 3,80 TL / lmgH 2,69 f2345 / (CT2+T23+CT3) 0,96 SL / lmgH 1,42 (R3+R4) / (R3-R4) 1,74 SL / TL 0,53 R7 / f3 0,88 TD / f 3,06 SL / f4567 0,91 BL / f 0,35 T12 / T56 1,56 TL / CT2 16,16 T56 / CT5 1,33 TL / CT3 5,01 (T34+CT4) / CT3 0,60 TL / R4 3,05 (TL-SL) / f123 0,23 ATmax / f 0,31 (CT2+T23+CT3) / (CT4+T45+CT5) 1,91 (EPD×SL) / (lmgH×CT4) 1,57 V5 19,5 f / f56 -0,87 V7 20,4 6. Embodiment

[0162] Fig. 11 is a schematic view of an image acquisition unit according to the 6th embodiment of the present disclosure. Fig. Figure 12 shows, in order from left to right, spherical aberration curves, astigmatic field curves, and a distortion curve of the image acquisition unit according to the sixth embodiment. Fig. 11, the image acquisition unit 6 includes the imaging optical lens assembly (the reference numeral of which is omitted) of the present disclosure and an image sensor IS. The imaging optical lens assembly includes, in order from an object side to an image side along an optical axis, a first lens element E1, a second lens element E2, a third lens element E3, an aperture stop ST, a fourth lens element E4, a fifth lens element E5, a sixth lens element E6, a seventh lens element E7, a filter E8, and an image surface IMG. The imaging optical lens assembly includes seven lens elements (E1, E2, E3, E4, E5, E6, and E7), and no additional lens element is disposed between each of the seven adjacent lens elements.

[0163] The first lens element E1 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 first lens element E1 is made of plastic material and has both the object-side and image-side surfaces aspherical.

[0164] The second lens element E2 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 second lens element E2 is made of plastic material and has both the object-side surface and the image-side surface aspherical. The object-side surface of the second lens element E2 has an inflection point. The object-side surface of the second lens element E2 has a critical point in an off-axis region thereof.

[0165] The third lens element E3 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 third lens element E3 is made of glass material and has both the object-side and image-side surfaces aspherical.

[0166] 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 convex in a paraxial region thereof. The fourth lens element E4 is made of plastic material and has both the object-side and image-side surfaces aspherical.

[0167] The fifth lens element E5 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 fifth lens element E5 is made of plastic and has both the object-side and image-side surfaces aspherical.

[0168] 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 material and has both the object-side surface and the image-side surface aspherical. The object-side surface of the sixth lens element E6 has an inflection point. The image-side surface of the sixth lens element E6 has an inflection point. The object-side surface of the sixth lens element E6 has a critical point in an off-axis region thereof. The image-side surface of the sixth lens element E6 has a critical point in an off-axis region thereof.

[0169] The seventh lens element E7 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 seventh lens element E7 is made of plastic material and has both the object-side surface and the image-side surface aspherical. The object-side surface of the seventh lens element E7 has one inflection point. The image-side surface of the seventh lens element E7 has two inflection points. The image-side surface of the seventh lens element E7 has a critical point in an off-axis region thereof.

[0170] The E8 filter is made of glass and is located between the seventh lens element E7 and the image surface IMG. It does not affect the focal length of the imaging optical lens assembly. The image sensor IS is located on or near the image surface IMG of the imaging optical lens assembly.

[0171] In this embodiment, each value of an Abbe number of the second lens element E2 and an Abbe number of the third lens element E3 is less than 40.0.

[0172] The detailed optical data of the sixth embodiment are shown in Table 6A and the aspherical surface data are shown in Table 6B below. TABLE 6A 6. Embodiment f = 3.41 mm, Fno = 2.80, HFOV = 70.0 degrees Surface # radius of curvature thickness material index Abbé # focal length 0 object infinity 1000,000 1 Lens 1 22,5690 (ASP) 0,926 plastic 1,544 55,5 -5,79 2 2,7246 (ASP) 1,162 3 Lens 2 308,9825 (ASP) 0,869 plastic 1,656 21,3 -6,56 4 4,2391 (ASP) 0,183 5 Lens 3 4,2482 (ASP) 2,182 Glass 1,741 27,8 3,71 6 -6,0692 (ASP) 0,177 7 Aperture diaphragm Plano -0,118 8 Lens 4 2,9299 (ASP) 1,190 plastic 1,544 55,9 2,81 9 -2,7303 (ASP) 0,099 10 Lens 5 -5,6815 (ASP) 0,400 plastic 1,660 20,4 -4,00 11 5,0620 (ASP) 0,773 12 Lens 6 9,5446 (ASP) 0,891 plastic 1,544 56,0 31,46 13 20,8683 (ASP) 0,556 14 Lens 7 -65,7048 (ASP) 0,906 plastic 1,584 28,2 -7,90 15 4,9915 (ASP) 0,762 16 filter Plano 0,210 Glass 1,517 64,2 - 17 Plano 0,105 18 Picture Plano - Note: The reference wavelength is 587.6 nm (d-line). TABLE 6B Aspherical coefficients Surface # 1 2 3 4 k = -7,58654E-02 -1,99746E-01 -4,96866E+01 -5,61208E+00 A4 = -8,349143924E-05 -8,522818659E-04 -1,374862925E-02 1,774396146E-03 A6 = 2,305880558E-05 1,625276436E-03 6,018141765E-03 5,082391009E-02 A8 = 2,277944571E-07 -1,167451162E-03 -7,268425765E-03 -1,171843685E-01 A10 = -4,393631569E-07 4,089167295E-04 5,397525886E-03 1,638568323E-01 A12 = 2,881849584E-08 -7,129940252E-05 -2,316394374E-03 -1,456010639E-01 A14 = -4,087262144E-10 5,101575187E-06 6,137515940E-04 8,336840308E-02 A16 = - - -1,001169231E-04 -2,946486068E-02 A18 = - - 9,218172865E-06 5,792337387E-03 A20 = - - -3,646843050E-07 -4,803303315E-04 Surface # 5 6 8 9 k = -4,31582E-02 -2,85537E-03 -9,70522E-01 -2,58555E-01 A4 = -4,033058016E-04 5,688031881E-03 1,368358350E-02 3,847177107E-02 A6 = 7,249505269E-03 -2,326623562E-02 -1,019506256E-02 -5,340874405E-01 A8 = -1,418024729E-02 4,271529622E-02 -5,867706848E-03 4,460553448E+00 A10 = 1,134192361 E-02 -4,360898654E-02 3,569095983E-02 -2,271988534E+01 A12 = -4,201720335E-03 2,298937396E-02 -4,351844454E-02 7,102133089E+01 A14 = 6,000382764E-04 -4,749558707E-03 1,603699782E-02 -1,397137582E+02 A16 = - - - 1,728828563E+02 A18 = - - - -1,305004908E+02 A20 = - - - 5,490823151E+01 A22 = - - - -9,875242031E+00 Surface # 10 11 12 13 k = -9,51283E+01 -8,51861E+01 -4,84415E+01 -5,74954E+01 A4 = -9,455353053E-02 6,489068937E-02 -1,031977816E-01 5,956853911E-03 A6 = 9,970467361E-02 -8,186096111E-02 2,352230799E-01 -3,840320945E-03 A8 = -1,022903514E-01 1,337125417E-01 -2,059977145E+00 -2,773903079E-03 A10 = 7,765494657E-02 -1,486886862E-01 5,893776475E+00 2,076527453E-03 A12 = -6,584202943E-02 1,050235801E-01 -7,083688906E+00 -5,516426722E-04 A14 = 3,473548646E-02 -4,593527068E-02 -3,312229683E+00 1,765568421E-05 A16 = -7,013132809E-03 1,141759338E-02 2,200400262E+01 1,902766878E-05 A18 = - -1,224031785E-03 -2,933302450E+01 -3,584509802E-06 A20 = - - 1,789859929E+01 2,036082152E-07 A22 = - - -4,368478717E+00 - Surface # 14 15 k = -3,27311E+01 -6,55001E+00 A4 = -1,290983875E+00 -3,387117728E+00 A6 = 9,516362760E+00 1,222381348E+01 A8 = -1,260682027E+02 -4,338273235E+01 A10 = 1,147664035E+03 -1,159905574E+01 A12 = -7,109606726E+03 1,242624826E+03 A14 = 3,052056060E+04 -8,034470169E+03 A16 = -9,249998207E+04 2,923987637E+04 A18 = 2,000901407E+05 -7,012339601E+04 A20 = -3,093446212E+05 1,157273405E+05 A22 = 3,383366903E+05 -1,323182328E+05 A24 = -2,550771041E+05 1,029987061E+05 A26 = 1,258595862E+05 -5,207303638E+04 A28 = -3,652984356E+04 1,541009369E+04 A30 = 4,723509148E+03 -2,024841779E+03

[0173] In the sixth embodiment, the equation for the aspherical surface profiles of the aforementioned lens elements is the same as that of the first embodiment. The definitions of these parameters shown in Table 6C are also the same as those given in the first embodiment, with corresponding values ​​for the sixth embodiment, so explanations regarding them will not be repeated.

[0174] In addition, these parameters can be calculated from Table 6A and Table 6B as the following values ​​and satisfy the following conditions: TABLE 6C Schematic parameters f [mm] 3,41 f / R3 0,01 Fno 2,80 f12 / f56 0,59 HFOV [degree] 70,0 f45 / f23 0,91 FOV [degrees] 139,9 f45 / (CT4+T45+CT5) 3,66 TL / lmgH 2,80 f2345 / (CT2+T23+CT3) 0,97 SL / lmgH 1,44 (R3+R4) / (R3-R4) 1,03 SL / TL 0,51 R7 / f3 0,79 TD / f 2,99 SL / f4567 0,83 BL / f 0,32 T12 / T56 1,50 TL / CT2 12,97 T56 / CT5 1,93 TL / CT3 5,17 (T34+CT4) / CT3 0,57 TL / R4 2,66 (TL-SL) / f123 0,28 ATmax / f 0,34 (CT2+T23+CT3) / (CT4+T45+CT5) 1,91 (EPD×SL) / (lmgH×CT4) 1,47 V5 20,4 f / f56 -0,73 V7 28,2 7. Embodiment

[0175] Fig. 13 is a schematic view of an image acquisition unit according to the 7th embodiment of the present disclosure. Fig. Figure 14 shows, in order from left to right, spherical aberration curves, astigmatic field curves, and a distortion curve of the image acquisition unit according to the 7th embodiment. Fig. 13, the image acquisition unit 7 includes the imaging optical lens assembly (the reference numeral of which is omitted) of the present disclosure and an image sensor IS. The imaging optical lens assembly includes, in order from an object side to an image side along an optical axis, a first lens element E1, a second lens element E2, a third lens element E3, an aperture stop ST, a fourth lens element E4, a fifth lens element E5, a sixth lens element E6, a seventh lens element E7, a filter E8, and an image surface IMG. The imaging optical lens assembly includes seven lens elements (E1, E2, E3, E4, E5, E6, and E7), and no additional lens element is disposed between each of the seven adjacent lens elements.

[0176] The first lens element E1 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 first lens element E1 is made of glass material and has both the objective and image sides spherical.

[0177] The second lens element E2 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 second lens element E2 is made of plastic material and has both the object-side and image-side surfaces aspherical.

[0178] The third lens element E3 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 third lens element E3 is made of plastic material and has both the object-side and image-side surfaces aspherical. The image-side surface of the third lens element E3 has an inflection point.

[0179] 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 convex in a paraxial region thereof. The fourth lens element E4 is made of plastic and has both the object and image sides aspherical.

[0180] The fifth lens element E5 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 fifth lens element E5 is made of plastic and has both the object-side and image-side surfaces aspherical.

[0181] 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 material and has both the object-side surface and the image-side surface aspherical. The object-side surface of the sixth lens element E6 has an inflection point. The image-side surface of the sixth lens element E6 has an inflection point. The object-side surface of the sixth lens element E6 has a critical point in an off-axis region thereof. The image-side surface of the sixth lens element E6 has a critical point in an off-axis region thereof.

[0182] The seventh lens element E7 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 seventh lens element E7 is made of plastic material and has both the object-side surface and the image-side surface aspherical. The object-side surface of the seventh lens element E7 has two inflection points. The image-side surface of the seventh lens element E7 has one inflection point. The object-side surface of the seventh lens element E7 has a critical point in an off-axis region thereof. The image-side surface of the seventh lens element E7 has a critical point in an off-axis region thereof.

[0183] The E8 filter is made of glass and is located between the seventh lens element E7 and the image surface IMG. It does not affect the focal length of the imaging optical lens assembly. The image sensor IS is located on or near the image surface IMG of the imaging optical lens assembly.

[0184] In this embodiment, each value of an Abbe number of the second lens element E2, an Abbe number of the third lens element E3, and an Abbe number of the sixth lens element E6 is less than 40.0.

[0185] The detailed optical data of the 7th embodiment are shown in Table 7A and the aspherical surface data are shown in Table 7B below. TABLE 7A 7. Embodiment f = 3.07 mm, Fno = 2.80, HFOV = 76.2 degrees Surface # radius of curvature thickness material index Abbé # focal length 0 object infinity 1000,000 1 Lens 1 22,7631 (SPH) 1,351 Glass 1,651 55,9 -5,21 2 2,8819 (SPH) 1,229 3 Lens 2 -178,5714 (ASP) 1,000 plastic 1,615 25,3 -6,77 4 4,2729 (ASP) 0,170 5 Lens 3 4,4060 (ASP) 2,121 plastic 1,615 25,3 4,66 6 -6,6892 (ASP) 0,182 7 Aperture diaphragm Plano -0,146 8 Lens 4 2,4749 (ASP) 1,157 plastic 1,544 56,0 2,64 9 -2,8634 (ASP) 0,083 10 Lens 5 -6,8433 (ASP) 0,711 plastic 1,669 19,5 -4,23 11 5,0325 (ASP) 0,677 12 Lens 6 5,9750 (ASP) 0,800 plastic 1,567 37,4 -28,40 13 4,1460 (ASP) 0,538 14 Lens 7 4,4153 (ASP) 1,134 plastic 1,614 25,6 77,35 15 4,3927 (ASP) 0,813 16 filter Plano 0,210 Glass 1,517 64,2 - 17 Plano 0,130 18 Picture Plano - Note: The reference wavelength is 587.6 nm (d-line). TABLE 7B Aspherical coefficients Surface # 3 4 5 6 k = -9,90000E+01 -6,38028E+00 4,80061E-01 -4,54538E-01 A4 = -5,890717534E-03 1,798405109E-02 4,839593832E-03 3,600124064E-03 A6 = -9,174454880E-03 -2,025051729E-02 -1,479059690E-02 -1,494577627E-02 A8 = 9,167247752E-03 1,581078650E-02 1,683996484E-02 2,656500445E-02 A10 = -4,879314735E-03 1,365430791E-02 -7,860026721E-03 -2,237076575E-02 A12 = 1,536238374E-03 -3,388051839E-02 1,276617810E-03 7,266145064E-03 A14 = -2,434458117E-04 2,963381740E-02 - - A16 = 2,972184148E-06 -1,402407783E-02 - - A18 = 4,485462855E-06 3,514002065E-03 - - A20 = -4,381529252E-07 -3,620972333E-04 - - Surface # 8 9 10 11 k = -7,85001E-01 6,84023E-03 -9,70613E+01 -8,95659E+01 A4 = 1,004106569E-02 -3,911162115E-03 -8,175997677E-02 7,627131458E-02 A6 = 4,264283847E-03 -5,003719275E-02 1,072104904E-01 -1,103026444E-01 A8 = -2,746761476E-02 4,233176836E-01 -2,785698472E-01 1,607686382E-01 A10 = 5,489027170E-02 -1,732606985E+00 5,033542036E-01 -1,809534497E-01 A12 = -5,020885872E-02 4,094261115E+00 -5,252646399E-01 1,518263694E-01 A14 = 1,615754325E-02 -5,897344755E+00 2,747422139E-01 -8,522035852E-02 A16 = - 5,212226445E+00 -5,624471509E-02 2,759138297E-02 A18 = - -2,757075777E+00 - -3,819690159E-03 A20 = - 8,002559394E-01 - - A22 = - -9,781447168E-02 - - Surface # 12 13 14 15 k = -2,28639E+01 -4,73962E+01 -3,44839E+01 -3,87979E+00 A4 = -2,660214371E-02 9,462197466E-04 -4,310787692E-02 -1,220229995E-04 A6 = 4,737673580E-02 -1,399729401E-02 1,414983925E-01 -7,654815651E-03 A8 = -6,103484736E-02 2,693251651E-02 -4,362294410E-01 -2,243829453E-02 A10 = 4,976712377E-02 -2,414977739E-02 7,296591883E-01 3,427937912E-02 A12 = -3,027901150E-02 1,164195617E-02 -7,748977957E-01 -2,388202262E-02 A14 = 1,351268613E-02 -3,306914238E-03 5,613875309E-01 1,029770935E-02 A16 = -4,052769825E-03 5,532263898E-04 -2,870069531E-01 -3,001265671E-03 A18 = 7,123605086E-04 -5,041448945E-05 1,051076919E-01 6,123183557E-04 A20 = -5,586354259E-05 1,930439150E-06 -2,763591608E-02 -8,846514106E-05 A22 = 2,745690709E-07 - 5,165281487E-03 9,005469343E-06 A24 = - - -6,688405095E-04 -6,313041979E-07 A26 = - - 5,697549335E-05 2,898978197E-08 A28 = - - -2,869547663E-06 -7,845447296E-10 A30 = - - 6,469879709E-08 9,481152425E-12

[0186] In the 7th embodiment, the equation for the aspherical surface profiles of the aforementioned lens elements is the same as that of the 1st embodiment. The definitions of these parameters shown in Table 7C are also the same as those given in the 1st embodiment, with corresponding values ​​for the 7th embodiment, so explanations regarding them will not be repeated.

[0187] In addition, these parameters can be calculated from Table 7A and Table 7B as the following values ​​and satisfy the following conditions: TABLE 7C Schematic parameters f [mm] 3,07 f / R3 -0,02 Fno 2,80 f12 / f56 0,76 HFOV [degree] 76,2 f45 / f23 0,43 FOV [degrees] 152,4 f45 / (CT4+T45+CT5) 2,44 TL / lmgH 3,02 f2345 / (CT2+T23+CT3) 0,96 SL / lmgH 1,52 (R3+R4) / (R3-R4) 0,95 SL / TL 0,50 R7 / f3 0,53 TD / f 3,59 SL / f4567 1,40 BL / f 0,38 T12 / T56 1,82 TL / CT2 12,16 T56 / CT5 0,95 TL / CT3 5,73 (T34+CT4) / CT3 0,56 TL / R4 2,85 (TL-SL) / f123 -0,25 ATmax / f 0,40 (CT2+T23+CT3) / (CT4+T45+CT5) 1,69 (EPD×SL) / (lmgH×CT4) 1,44 V5 19,5 f / f56 -0,90 V7 25,6 8. Embodiment

[0188] Fig. 15 is a schematic view of an image acquisition unit according to the 8th embodiment of the present disclosure. Fig. Fig. 16 shows, in order from left to right, spherical aberration curves, astigmatic field curves, and a distortion curve of the image acquisition unit according to the 8th embodiment. Fig. 15, the image acquisition unit 8 includes the imaging optical lens assembly (the reference numeral of which is omitted) of the present disclosure and an image sensor IS. The imaging optical lens assembly includes, in order from an object side to an image side along an optical axis, a first lens element E1, a second lens element E2, a third lens element E3, an aperture stop ST, a fourth lens element E4, a fifth lens element E5, a sixth lens element E6, a seventh lens element E7, a filter E8, and an image surface IMG. The imaging optical lens assembly includes seven lens elements (E1, E2, E3, E4, E5, E6, and E7), and no additional lens element is disposed between each of the seven adjacent lens elements.

[0189] The first lens element E1 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 first lens element E1 is made of glass material and has both the object-side surface and the image-side surface spherical.

[0190] The second lens element E2 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 second lens element E2 is made of plastic material and has both the object-side surface and the image-side surface aspherical. The object-side surface of the second lens element E2 has an inflection point. The object-side surface of the second lens element E2 has a critical point in an off-axis region thereof.

[0191] The third lens element E3 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 third lens element E3 is made of glass material and has both the object-side and image-side surfaces spherical.

[0192] 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 convex in a paraxial region thereof. The fourth lens element E4 is made of plastic material and has both the object-side and image-side surfaces aspherical. The object-side surface of the fourth lens element E4 has an inflection point.

[0193] The fifth lens element E5 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 fifth lens element E5 is made of plastic material and has both the object-side and image-side surfaces aspherical. The object-side surface of the fifth lens element E5 has an inflection point.

[0194] 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 material and has both the object-side surface and the image-side surface aspherical. The object-side surface of the sixth lens element E6 has an inflection point. The image-side surface of the sixth lens element E6 has an inflection point. The object-side surface of the sixth lens element E6 has a critical point in an off-axis region thereof. The image-side surface of the sixth lens element E6 has a critical point in an off-axis region thereof.

[0195] The seventh lens element E7 with negative refractive power has an object-side surface that is convex in a paraxial region and an image-side surface that is concave in a paraxial region thereof. The seventh lens element E7 is made of plastic material and has both the object-side surface and the image-side surface aspherical. The object-side surface of the seventh lens element E7 has two inflection points. The image-side surface of the seventh lens element E7 has two inflection points. The object-side surface of the seventh lens element E7 has a critical point in an off-axis region thereof. The image-side surface of the seventh lens element E7 has a critical point in an off-axis region thereof.

[0196] The E8 filter is made of glass and is located between the seventh lens element E7 and the image surface IMG. It does not affect the focal length of the imaging optical lens assembly. The image sensor IS is located on or near the image surface IMG of the imaging optical lens assembly.

[0197] In this embodiment, each value of an Abbe number of the second lens element E2 and an Abbe number of the third lens element E3 is less than 40.0.

[0198] The detailed optical data of the 8th embodiment are shown in Table 8A and the aspherical surface data are shown in Table 8B below. TABLE 8A 8. Embodiment f = 3.31 mm, Fno = 2.80, HFOV = 74.9 degrees Surface # radius of curvature thickness material index Abbé # focal length 0 object infinity 1000,000 1 Lens 1 27,0651 (SPH) 0,800 Glass 1,804 46,5 -4,38 2 3,0755 (SPH) 1,127 3 Lens 2 32,1076 (ASP) 0,704 plastic 1,660 20,4 -6,03 4 3,5106 (ASP) 0,138 5 Lens 3 3,8134 (SPH) 2,417 Glass 1,805 25,5 3,40 6 -6,9531 (SPH) 0,663 7 Aperture diaphragm Plano -0,091 8 Lens 4 3,3826 (ASP) 1,054 plastic 1,544 56,0 3,01 9 -2,8335 (ASP) 0,050 10 Lens 5 -9,2802 (ASP) 0,500 plastic 1,669 19,5 -4,85 11 5,1051 (ASP) 1,062 12 Lens 6 4,8693 (ASP) 0,693 plastic 1,544 56,0 298,28 13 4,7682 (ASP) 0,736 14 Lens 7 10,6530 (ASP) 0,933 plastic 1,660 20,4 -19,13 15 5,5763 (ASP) 0,800 16 filter Plano 0,210 Glass 1,517 64,2 - 17 Plano 0,183 18 Picture Plano - Note: The reference wavelength is 587.6 nm (d-line). TABLE 8B Aspherical coefficients Surface # 3 4 8 9 k = 8,36334E+01 -5,00991E+00 -5,35436E+00 -9,39380E-01 A4 = -8,667974587E-03 1,094839434E-02 1,368813872E-02 3,705127758E-03 A6 = -6,650635443E-03 -6,206825894E-04 -1,052086782E-03 -1,074323183E-01 A8 = 9,047184883E-03 -1,111028068E-03 -1,695132127E-02 6,663642961E-01 A10 = -6,961352770E-03 2,330095102E-03 1,958254602E-02 -2,252677411E+00 A12 = 3,290708734E-03 -1,961092761E-03 -1,537967179E-02 4,441532687E+00 A14 = -9,665359154E-04 9,344974089E-04 3,459597937E-03 -5,467399925E+00 A16 = 1,705468182E-04 -2,618445719E-04 - 4,245225529E+00 A18 = -1,637366383E-05 4,086584939E-05 - -2,020230067E+00 A20 = 6,468706970E-07 -2,772965330E-06 - 5,372315268E-01 A22 = - - - -6,088593646E-02 Surface # 10 11 12 13 k = -9,74871E+01 -9,00000E+01 -1,32994E+00 -3,20756E+00 A4 = -4,291792833E-02 6,992532607E-02 -1,469478337E-02 9,307641959E-03 A6 = 8,585089971E-02 -8,544473192E-02 1,665646000E-02 -1,514160223E-02 A8 = -1,659813405E-01 1,262360681E-01 -3,139601087E-02 9,418982936E-03 A10 = 2,012134292E-01 -1,340279675E-01 3,123599688E-02 -4,218756597E-03 A12 = -1,480363033E-01 9,850598941E-02 -1,950609974E-02 1,258481544E-03 A14 = 5,512913042E-02 -4,745934505E-02 7,923331635E-03 -2,421034447E-04 A16 = -7,466727072E-03 1,328015630E-02 -2,084039846E-03 2,865644145E-05 A18 = - -1,607238084E-03 3,415155584E-04 -1,900695579E-06 A20 = - - -3,163456728E-05 5,411190503E-08 A22 = - - 1,261769099E-06 - Surface # 14 15 k = -6,07116E+01 -1,39253E+01 A4 = 4,976704400E-03 2,614505631E-02 A6 = -2,016761873E-03 -3,586321362E-02 A8 = -4,549995929E-02 1,763668675E-02 A10 = 7,222274834E-02 -4,871224242E-03 A12 = -6,009237999E-02 6,409235237E-04 A14 = 3,234782972E-02 3,336795838E-05 A16 = -1,204364772E-02 -2,939321004E-05 A18 = 3,184208606E-03 5,406368389E-06 A20 = -6,018911735E-04 -4,965327958E-07 A22 = 8,067965918E-05 1,849395927E-08 A24 = -7,479184438E-06 7,242806081E-10 A26 = 4,554406305E-07 -1,090019553E-10 A28 = -1,637566863E-08 4,508674474E-12 A30 = 2,632975341E-10 -6,779488384E-14

[0199] In the 8th embodiment, the equation for the aspherical surface profiles of the aforementioned lens elements is the same as that of the 1st embodiment. The definitions of these parameters shown in Table 8C are also the same as those given in the 1st embodiment, with corresponding values ​​for the 8th embodiment, so explanations regarding them will not be repeated.

[0200] In addition, these parameters can be calculated from Table 8A and Table 8B as the following values ​​and satisfy the following conditions: TABLE 8C Schematic parameters f [mm] 3,31 f / R3 0,10 Fno 2,80 f12 / f56 0,47 HFOV [degree] 74,9 f45 / f23 0,96 FOV [degrees] 149,9 f45 / (CT4+T45+CT5) 3,78 TL / lmgH 2,98 f2345 / (CT2+T23+CT3) 1,00 SL / lmgH 1,52 (R3+R4) / (R3-R4) 1,25 SL / TL 0,51 R7 / f3 1,00 TD / f 3,26 SL / f4567 1,02 BL / f 0,36 T12 / T56 1,06 TL / CT2 17,02 T56 / CT5 2,12 TL / CT3 4,96 (T34+CT4) / CT3 0,67 TL / R4 3,41 (TL-SL) / f123 0,16 ATmax / f 0,34 (CT2+T23+CT3) / (CT4+T45+CT5) 2,03 (EPD×SL) / (lmgH×CT4) 1,72 V5 19,5 f / f56 -0,70 V7 20,4 9. Embodiment

[0201] Fig. 17 is a schematic view of an image acquisition unit according to the 9th embodiment of the present disclosure. Fig. Fig. 18 shows, in order from left to right, spherical aberration curves, astigmatic field curves, and a distortion curve of the image acquisition unit according to the 9th embodiment. In Fig. 17, the image acquisition unit 9 includes the imaging optical lens assembly (the reference numeral of which is omitted) of the present disclosure and an image sensor IS. The imaging optical lens assembly includes, in order from an object side to an image side along an optical axis, a first lens element E1, a second lens element E2, a third lens element E3, an aperture stop ST, a fourth lens element E4, a fifth lens element E5, a sixth lens element E6, a seventh lens element E7, a filter E8, and an image surface IMG. The imaging optical lens assembly includes seven lens elements (E1, E2, E3, E4, E5, E6, and E7), and no additional lens element is disposed between each of the seven adjacent lens elements.

[0202] The first lens element E1 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 first lens element E1 is made of glass material and has both the object-side surface and the image-side surface spherical.

[0203] The second lens element E2 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 second lens element E2 is made of plastic material and has both the object-side and image-side surfaces aspherical. The object-side surface of the second lens element E2 has an inflection point.

[0204] The third lens element E3 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 third lens element E3 is made of glass material and has both the object-side and image-side surfaces spherical.

[0205] 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 convex in a paraxial region thereof. The fourth lens element E4 is made of plastic material and has both the object-side and image-side surfaces aspherical. The object-side surface of the fourth lens element E4 has an inflection point.

[0206] The fifth lens element E5 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 fifth lens element E5 is made of plastic material and has both the object-side and image-side surfaces aspherical. The object-side surface of the fifth lens element E5 has an inflection point.

[0207] 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 material, and both the object-side surface and the image-side surface are aspherical. The object-side surface of the sixth lens element E6 has an inflection point. The image-side surface of the sixth lens element E6 has an inflection point. The object-side surface of the sixth lens element E6 has a critical point in an off-axis region thereof.

[0208] The seventh lens element E7 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 seventh lens element E7 is made of plastic material and has both the object-side surface and the image-side surface aspherical. The object-side surface of the seventh lens element E7 has two inflection points. The image-side surface of the seventh lens element E7 has one inflection point. The object-side surface of the seventh lens element E7 has a critical point in an off-axis region thereof. The image-side surface of the seventh lens element E7 has a critical point in an off-axis region thereof.

[0209] The E8 filter is made of glass and is located between the seventh lens element E7 and the image surface IMG. It does not affect the focal length of the imaging optical lens assembly. The image sensor IS is located on or near the image surface IMG of the imaging optical lens assembly.

[0210] In this embodiment, each value of an Abbe number of the third lens element E3 and an Abbe number of the sixth lens element E6 is less than 40.0.

[0211] The detailed optical data of the 9th embodiment are shown in Table 9A and the aspherical surface data are shown in Table 9B below. TABLE 9A 9. Embodiment f = 2.16 mm, Fno = 2.80, HFOV = 77.5 degrees Surface # radius of curvature thickness material index Abbé # focal length 0 object infinity 1000,000 1 Lens 1 8,8608 (SPH) 0,750 Glass 1,804 46,5 -5,82 2 2,9470 (SPH) 1,325 3 Lens 2 6,4312 (ASP) 0,700 plastic 1,544 56,0 -4,58 4 1,7261 (ASP) 1,287 5 Lens 3 3,4675 (SPH) 2,150 Glass 1,728 28,3 5,23 6 28,5714 (SPH) 0,236 7 Aperture diaphragm Plano -0,055 8 Lens 4 2,8262 (ASP) 1,142 plastic 1,544 56,0 2,11 9 -1,6532 (ASP) 0,050 10 Lens 5 -3,1918 (ASP) 0,450 plastic 1,669 19,5 -2,78 11 4,6933 (ASP) 0,065 12 Lens 6 2,1225 (ASP) 0,600 plastic 1,587 28,3 7,30 13 3,7660 (ASP) 1,059 14 Lens 7 9,5347 (ASP) 0,947 plastic 1,544 56,0 -24,92 15 5,4019 (ASP) 0,600 16 filter Plano 0,210 Glass 1,517 64,2 - 17 Plano 0,371 18 Picture Plano - Note: The reference wavelength is 587.6 nm (d-line). TABLE 9B Aspherical coefficients Surface # 3 4 8 9 k = 0,00000E+00 -7,29104E-01 0,00000E+00 -3,73710E-01 A4 = 1,589230994E-02 4,530324047E-02 -1,795326588E-02 7,922773018E-02 A6 = -4,538309052E-03 -1,547189168E-02 1,340952978E-01 -9,526858516E-01 A8 = 1,178315254E-03 2,671438825E-02 -1,348476727E+00 4,859247974E+00 A10 = -2,012351994E-04 -2,412392140E-02 6,916272183E+00 -1,626351303E+01 A12 = 1,886407711E-05 1,293866972E-02 -2,249686582E+01 3,589650252E+01 A14 = -7,517280622E-07 -2,972236250E-03 4,638458129E+01 -5,241328390E+01 A16 = - -2,723048162E-04 -5,894342354E+01 4,975534269E+01 A18 = - 2,652546375E-04 4,176390793E+01 -2,939164143E+01 A20 = - -3,622551328E-05 -1,256133680E+01 9,762459056E+00 A22 = - - - -1,384265625E+00 Surface # 10 11 12 13 k = 9,51177E-02 -9,00000E+01 -4,00684E+00 -2,21672E+00 A4 = 8,604772095E-03 3,310350273E-03 -8,655787573E-02 7,025189408E-03 A6 = -3,946352108E-01 -9,954491938E-02 1,163826662E-01 -8,585911237E-03 A8 = 1,264673259E+00 2,989421062E-01 -1,089253554E-01 5,231279863E-03 A10 = -2,473138496E+00 -4,356690386E-01 6,114592911E-02 -3,289709308E-03 A12 = 3,107895324E+00 3,828913037E-01 -1,477971531E-02 1,320286276E-03 A14 = -2,550605344E+00 -2,024957438E-01 -4,699055793E-03 -3,281275961E-04 A16 = 1,324676435E+00 5,918595567E-02 4,509406675E-03 4,871927640E-05 A18 = -4,022854010E-01 -7,303977940E-03 -1,196191594E-03 -3,886558727E-06 A20 = 5,807531655E-02 - 8,772841585E-05 1,254095267E-07 A22 = - - 6,440938754E-06 - Surface # 14 15 k = 3,24972E+00 -3,16959E+01 A4 = -1,435863042E-02 2,066960955E-02 A6 = -8,326494031E-03 -2,492321278E-02 A8 = 1,386151484E-03 1,255954353E-02 A10 = 3,782335545E-03 -4,422244797E-03 A12 = -3,440177182E-03 1,165079520E-03 A14 = 1,571237496E-03 -2,365672911E-04 A16 = -4,615628901E-04 3,752486827E-05 A18 = 9,326414427E-05 -4,677590697E-06 A20 = -1,312943129E-05 4,530884788E-07 A22 = 1,264873906E-06 -3,276508521E-08 A24 = -7,940329444E-08 1,638616281E-09 A26 = 2,922979534E-09 -4,963236048E-11 A28 = -4,782874354E-11 6,757933835E-13

[0212] In the 9th embodiment, the equation for the aspherical surface profiles of the aforementioned lens elements is the same as the equation for the 1st embodiment. The definitions of these parameters shown in Table 9C are also the same as those given in the 1st embodiment, with corresponding values ​​for the 9th embodiment, so explanations regarding them will not be repeated.

[0213] In addition, these parameters can be calculated from Table 9A and Table 9B as the following values ​​and satisfy the following conditions: TABLE 9C Schematic parameters f [mm] 2,16 f / R3 0,34 Fno 2,80 f12 / f56 0,51 HFOV [degree] 77,5 f45 / f23 0,06 FOV [degrees] 154,9 f45 / (CT4+T45+CT5) 3,16 TL / lmgH 2,95 f2345 / (CT2+T23+CT3) 1,00 SL / lmgH 1,35 (R3+R4) / (R3-R4) 1,73 SL / TL 0,46 R7 / f3 0,54 TD / f 4,95 SL / f4567 1,71 BL / f 0,55 T12 / T56 20,38 TL / CT2 16,98 T56 / CT5 0,14 TL / CT3 5,53 (T34+CT4) / CT3 0,62 TL / R4 6,89 (TL-SL) / f123 -0,81 ATmax / f 0,61 (CT2+T23+CT3) / (CT4+T45+CT5) 2,52 (EPD×SL) / (lmgH×CT4) 0,92 V5 19,5 f / f56 -0,50 V7 56,0 10. Embodiment

[0214] Fig. 19 is a schematic view of an image acquisition unit according to the 10th embodiment of the present disclosure. Fig. Figure 20 shows, in order from left to right, spherical aberration curves, astigmatic field curves, and a distortion curve of the image acquisition unit according to the 10th embodiment. Fig. 19, the image acquisition unit 10 includes the imaging optical lens assembly (the reference numeral of which is omitted) of the present disclosure and an image sensor IS. The imaging optical lens assembly includes, in order from an object side to an image side along an optical axis, a first lens element E1, a second lens element E2, a third lens element E3, an aperture stop ST, a fourth lens element E4, a fifth lens element E5, a stop S1, a sixth lens element E6, a seventh lens element E7, a filter E8, and an image surface IMG. The imaging optical lens assembly includes seven lens elements (E1, E2, E3, E4, E5, E6, and E7), and no additional lens element is disposed between each of the seven adjacent lens elements.

[0215] The first lens element E1 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 first lens element E1 is made of plastic material and has both the object-side and image-side surfaces aspherical.

[0216] The second lens element E2 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 second lens element E2 is made of plastic material and has both the object-side surface and the image-side surface aspherical. The object-side surface of the second lens element E2 has two inflection points. The object-side surface of the second lens element E2 has a critical point in an off-axis region thereof.

[0217] The third lens element E3 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 third lens element E3 is made of plastic material and has both the object-side and image-side surfaces aspherical.

[0218] 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 convex in a paraxial region thereof. The fourth lens element E4 is made of plastic material and has both the object-side and image-side surfaces aspherical.

[0219] The fifth lens element E5 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 fifth lens element E5 is made of plastic and has both the object-side and image-side surfaces aspherical.

[0220] 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 material and has both the object-side surface and the image-side surface aspherical. The object-side surface of the sixth lens element E6 has an inflection point. The image-side surface of the sixth lens element E6 has an inflection point. The object-side surface of the sixth lens element E6 has a critical point in an off-axis region thereof. The image-side surface of the sixth lens element E6 has a critical point in an off-axis region thereof.

[0221] The seventh lens element E7 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 seventh lens element E7 is made of plastic material and has both the object-side surface and the image-side surface aspherical. The object-side surface of the seventh lens element E7 has two inflection points. The image-side surface of the seventh lens element E7 has one inflection point. The object-side surface of the seventh lens element E7 has a critical point in an off-axis region thereof. The image-side surface of the seventh lens element E7 has a critical point in an off-axis region thereof.

[0222] The E8 filter is made of glass and is located between the seventh lens element E7 and the image surface IMG. It does not affect the focal length of the imaging optical lens assembly. The image sensor IS is located on or near the image surface IMG of the imaging optical lens assembly.

[0223] In this embodiment, each value of an Abbe number of the second lens element E2 and an Abbe number of the third lens element E3 is less than 40.0.

[0224] The detailed optical data of the 10th embodiment are shown in Table 10A and the aspherical surface data are shown in Table 10B below. TABLE 10A 10. Embodiment f = 3.35 mm, Fno = 2.80, HFOV = 82.1 degrees Surface # radius of curvature thickness material index Abbé # focal length 0 object infinity 1000,000 1 Lens 1 31,8841 (ASP) 0,873 plastic 1,544 56,0 -5,84 2 2,8632 (ASP) 1,302 3 Lens 2 251,6066 (ASP) 0,987 plastic 1,639 23,5 -6,67 4 4,1824 (ASP) 0,169 5 Lens 3 4,2653 (ASP) 2,086 plastic 1,615 25,3 4,42 6 -6,0971 (ASP) 0,178 7 Aperture diaphragm Plano -0,139 8 Lens 4 2,6772 (ASP) 1,179 plastic 1,544 56,0 2,73 9 -2,8233 (ASP) 0,078 10 Lens 5 -6,5319 (ASP) 0,515 plastic 1,656 21,3 -4,18 11 4,8711 (ASP) 0,715 12 aperture Plano 0,000 13 Lens 6 6,3128 (ASP) 0,789 plastic 1,544 56,0 32,12 14 9,4487 (ASP) 0,625 15 Lens 7 16,0608 (ASP) 1,013 plastic 1,566 37,4 -10,39 16 4,2075 (ASP) 0,802 17 filter Plano 0,210 Glass 1,517 64,2 - 18 Plano 0,266 19 Picture Plano - Note: The reference wavelength is 587.6 nm (d-line). An effective radius of the aperture S1 (surface 12) is 1.765 mm. TABLE 10B Aspherical coefficients Surface # 1 2 3 4 k = 1,00405E+01 -5,68855E-02 9,90000E+01 -5,92881E+00 A4 = -3,153668064E-05 -1,862296594E-03 -1,300014652E-02 7,170564917E-03 A6 = 1,875961711E-05 3,262823379E-03 3,901862788E-03 7,186585223E-03 A8 = -2,551099351E-06 -2,344135127E-03 -3,172071377E-03 5,680198139E-03 A10 = 1,326773316E-07 9,297263441 E-04 2,047246354E-03 -2,122879929E-02 A12 = -2,394990643E-09 -2,180084234E-04 -8,085021425E-04 2,687430390E-02 A14 = - 2,810463974E-05 1,984792330E-04 -1,914773438E-02 A16 = - -1,527829584E-06 -2,956055332E-05 8,060796113E-03 A18 = - - 2,434383582E-06 -1,852426819E-03 A20 = - - -8,374732231E-08 1,790812241E-04 Surface # 5 6 8 9 k = 2,68829E-01 -2,69030E-01 -7,81896E-01 -6,07268E-02 A4 = -3,005841620E-03 2,783705587E-03 9,882079190E-03 -5,427349967E-03 A6 = 8,168399897E-03 -5,766262333E-03 1,160624043E-02 -5,834601427E-02 A8 = -6,607749210E-03 4,651059464E-03 -5,284688046E-02 4,598305184E-01 A10 = 1,799103479E-03 -1,809608029E-03 8,761127933E-02 -1,461722759E+00 A12 = 6,214752952E-05 2,735256714E-04 -6,955673856E-02 2,631266621E+00 A14 = -6,773334271E-05 - 2,005240899E-02 -2,999536593E+00 A16 = 6,949531131E-17 - - 2,201494344E+00 A18 = - - - -1,012120093E+00 A20 = - - - 2,662115967E-01 A22 = - - - -3,065528117E-02 Surface # 10 11 13 14 k = -9,79719E+01 -9,01155E+01 -1,80400E+01 -4,36948E+01 A4 = -9,337939415E-02 7,520831511E-02 -1,452410055E-02 -7,513052378E-04 A6 = 1,134586813E-01 -1,274060117E-01 2,706287240E-02 8,475926451E-03 A8 = -1,281831013E-01 2,426363536E-01 -5,517262957E-02 -1,579506206E-02 A10 = 7,343667290E-02 -3,246771680E-01 5,979348714E-02 1,071747821E-02 A12 = -2,303693819E-02 2,821738412E-01 -3,881650068E-02 -3,981893868E-03 A14 = 3,324344131E-05 -1,504908779E-01 1,488223272E-02 8,041254254E-04 A16 = 1,660122113E-03 4,456874135E-02 -3,036662490E-03 -7,793931695E-05 A18 = - -5,588641650E-03 1,775950714E-04 1,687036201E-06 A20 = - - 4,086404190E-05 1,549315487E-07 A22 = - - -5,870370819E-06 - Surface # 15 16 k = -9,60493E+01 -6,23295E+00 A4 = -5,412450274E-02 -1,773648499E-02 A6 = 1,481410509E-01 1,034987459E-02 A8 = -4,060214098E-01 -2,636756145E-02 A10 = 6,768254427E-01 2,927186536E-02 A12 = -7,415633329E-01 -1,851961816E-02 A14 = 5,603424620E-01 7,579396007E-03 A16 = -3,000850498E-01 -2,127736270E-03 A18 = 1,153946025E-01 4,213567877E-04 A20 = -3,190949731E-02 -5,943301857E-05 A22 = 6,279095401E-03 5,937433386E-06 A24 = -8,565510537E-04 -4,104612529E-07 A26 = 7,688995153E-05 1,867215573E-08 A28 = -4,080995516E-06 -5,027268741E-10 A30 = 9,695609304E-08 6,068286959E-12

[0225] In the 10th embodiment, the equation for the aspherical surface profiles of the aforementioned lens elements is the same as that of the 1st embodiment. The definitions of these parameters shown in Table 10C are also the same as those given in the 1st embodiment, with corresponding values ​​for the 10th embodiment, so explanations will not be repeated.

[0226] In addition, these parameters can be calculated from Table 10A and Table 10B as the following values ​​and satisfy the following conditions: TABLE 10C Schematic parameters f [mm] 3,35 f / R3 0,01 Fno 2,80 f12 / f56 0,57 HFOV [degree] 82,1 f45 / f23 0,54 FOV [degrees] 164,2 f45 / (CT4+T45+CT5) 3,03 TL / lmgH 2,77 f2345 / (CT2+T23+CT3) 1,03 SL / lmgH 1,44 (R3+R4) / (R3-R4) 1,03 SL / TL 0,52 R7 / f3 0,61 TD / f 3,10 SL / f4567 1,18 BL / f 0,38 T12 / T56 1,82 TL / CT2 11,80 T56 / CT5 1,39 TL / CT3 5,58 (T34+CT4) / CT3 0,58 TL / R4 2,79 (TL-SL) / f123 -0,05 ATmax / f 0,39 (CT2+T23+CT3) / (CT4+T45+CT5) 1,83 (EPD×SL) / (lmgH×CT4) 1,46 V5 21,3 f / f56 -0,70 V7 37,4 11. Embodiment

[0227] Fig. 21 is a schematic view of an image acquisition unit according to the 11th embodiment of the present disclosure. Fig. Figure 22 shows, in order from left to right, spherical aberration curves, astigmatic field curves, and a distortion curve of the image acquisition unit according to the 11th embodiment. Fig. 21, the image acquisition unit 11 includes the imaging optical lens assembly (the reference numeral of which is omitted) of the present disclosure and an image sensor IS. The imaging optical lens assembly includes, in order from an object side to an image side along an optical axis, a first lens element E1, a second lens element E2, a third lens element E3, an aperture stop ST, a fourth lens element E4, a fifth lens element E5, a sixth lens element E6, a seventh lens element E7, a filter E8, and an image surface IMG. The imaging optical lens assembly includes seven lens elements (E1, E2, E3, E4, E5, E6, and E7), and no additional lens element is disposed between each of the seven adjacent lens elements.

[0228] The first lens element E1 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 first lens element E1 is made of glass material and has both the object-side and image-side surfaces aspherical.

[0229] The second lens element E2 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 second lens element E2 is made of plastic material and has both the object-side surface and the image-side surface aspherical. The object-side surface of the second lens element E2 has an inflection point. The object-side surface of the second lens element E2 has a critical point in an off-axis region thereof.

[0230] The third lens element E3 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 third lens element E3 is made of glass material and has both the object-side and image-side surfaces aspherical.

[0231] 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 convex in a paraxial region thereof. The fourth lens element E4 is made of plastic material and has both the object-side and image-side surfaces aspherical. The object-side surface of the fourth lens element E4 has an inflection point.

[0232] The fifth lens element E5 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 fifth lens element E5 is made of plastic and has both the object-side and image-side surfaces aspherical.

[0233] 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 material and has both the object-side surface and the image-side surface aspherical. The object-side surface of the sixth lens element E6 has an inflection point. The image-side surface of the sixth lens element E6 has an inflection point. The object-side surface of the sixth lens element E6 has a critical point in an off-axis region thereof. The image-side surface of the sixth lens element E6 has a critical point in an off-axis region thereof.

[0234] The seventh lens element E7 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 seventh lens element E7 is made of plastic material and has both the object-side surface and the image-side surface aspherical. The object-side surface of the seventh lens element E7 has two inflection points. The image-side surface of the seventh lens element E7 has two inflection points. The object-side surface of the seventh lens element E7 has a critical point in an off-axis region thereof. The image-side surface of the seventh lens element E7 has a critical point in an off-axis region thereof.

[0235] The E8 filter is made of glass and is located between the seventh lens element E7 and the image surface IMG. It does not affect the focal length of the imaging optical lens assembly. The image sensor IS is located on or near the image surface IMG of the imaging optical lens assembly.

[0236] In this embodiment, each value of an Abbe number of the second lens element E2 and an Abbe number of the third lens element E3 is less than 40.0.

[0237] The detailed optical data of the 11th embodiment are shown in Table 11A and the aspherical surface data are shown in Table 11B below. TABLE 11A 11. Embodiment f = 4.77 mm, Fno = 2.60, HFOV = 71.8 degrees Surface # radius of curvature thickness material index Abbé # focal length 0 object infinity 1000,000 1 Lens 1 29,0732 (ASP) 1,834 Glass 1,804 46,5 -6,33 2 4,2093 (ASP) 1,639 3 Lens 2 60,3412 (ASP) 1,274 plastic 1,660 20,4 -9,98 4 5,8891 (ASP) 0,236 5 Lens 3 5,7036 (ASP) 3,320 Glass 1,803 25,5 5,14 6 -11,0910 (ASP) 0,293 7 Aperture diaphragm Plano -0,208 8 Lens 4 4,2442 (ASP) 1,763 plastic 1,544 56,0 4,16 9 -4,1316 (ASP) 0,133 10 Lens 5 -9,6755 (ASP) 0,750 plastic 1,669 19,5 -5,99 11 7,0598 (ASP) 1,079 12 Lens 6 9,1757 (ASP) 1,231 plastic 1,544 56,0 64,96 13 11,8078 (ASP) 0,815 14 Lens 7 22,4640 (ASP) 1,506 plastic 1,614 25,6 -17,20 15 6,9977 (ASP) 1,188 16 filter Plano 0,315 Glass 1,517 64,2 - 17 Plano 0,170 18 Picture Plano - Note: The reference wavelength is 587.6 nm (d-line). TABLE 11B Aspherical coefficients Surface # 1 2 3 4 k = 7,99605E-02 -7,60642E-02 -4,86841E+01 -5,59188E+00 A4 = -1,070595059E-05 -5,394384508E-04 -4,643543187E-03 1,493880742E-03 A6 = 4,550308070E-06 3,235159880E-04 1,204221094E-03 4,305793713E-03 A8 = -2,441631567E-07 -8,136001136E-05 -6,716632185E-04 -3,618875132E-03 A10 = 2,994048273E-09 9,232947828E-06 2,242601170E-04 1,707952006E-03 A12 = 1,460217230E-11 -3,914365679E-07 -4,293257309E-05 -4,757754425E-04 A14 = - - 4,913646460E-06 8,532940293E-05 A16 = - - -3,314042450E-07 -1,030982903E-05 A18 = - - 1,203847457E-08 8,077104057E-07 A20 = - - -1,782548033E-10 -3,080376632E-08 Surface # 5 6 8 9 k = 6,79773E-02 1,40218E-01 -8,57162E-01 -2,20213E-01 A4 = -9,056872701E-04 1,439343607E-03 4,363219893E-03 2,962970771E-04 A6 = 2,212373233E-03 -2,420146880E-03 -2,013483754E-03 -1,014784016E-02 A8 = -1,933309299E-03 2,204972381E-03 1,299811175E-03 3,072299019E-02 A10 = 8,336304701E-04 -1,275915638E-03 -6,931028060E-04 -4,414342780E-02 A12 = -1,917742194E-04 4,413900228E-04 2,024916255E-04 3,707968600E-02 A14 = 2,257340295E-05 -8,256576928E-05 -3,171848003E-05 -1,989645936E-02 A16 = -1,068783882E-06 6,449304271E-06 - 6,872253503E-03 A18 = - - - -1,478520049E-03 A20 = - - - 1,803335234E-04 A22 = - - - -9,530755670E-06 Surface # 10 11 12 13 k = -9,50155E+01 -8,60184E+01 -2,43346E+01 -3,22247E+01 A4 = -2,881340306E-02 2,158822983E-02 -2,867064487E-03 9,371105209E-04 A6 = 1,670330966E-02 -1,490857677E-02 1,609950611E-03 4,103395654E-04 A8 = -1,000719200E-02 1,145334969E-02 -1,701933277E-03 -6,380087394E-04 A10 = 3,936895951E-03 -6,108160605E-03 6,581664396E-04 1,841963421E-04 A12 = -1,168187408E-03 2,149219769E-03 -9,869045702E-05 -2,751660331E-05 A14 = 2,041831546E-04 -4,759203043E-04 -1,128544636E-05 2,195660439E-06 A16 = -1,458171490E-05 5,992526131E-05 7,081858299E-06 -8,167739212E-08 A18 = - -3,249911673E-06 -1,198372560E-06 4,128213446E-10 A20 = - - 9,436267318E-08 3,728328016E-11 A22 = - - -2,962684594E-09 - Surface # 14 15 k = -9,90000E+01 -5,98967E+00 A4 = -1,614120431E-02 -1,066495116E-02 A6 = 1,433838450E-02 3,371366311E-03 A8 = -1,296544518E-02 -1,256880971E-03 A10 = 7,840842497E-03 3,144127254E-04 A12 = -3,294977196E-03 -5,142744923E-05 A14 = 9,863955200E-04 5,509537780E-06 A16 = -2,134534436E-04 -3,728133074E-07 A18 = 3,355909900E-05 1,326483881E-08 A20 = -3,819038690E-06 6,598358905E-11 A22 = 3,102192892E-07 -3,236104243E-11 A24 = -1,748147464E-08 1,648297971E-12 A26 = 6,477727230E-10 -4,230280180E-14 A28 = -1,416972470E-11 5,686905758E-16 A30 = 1,384724217E-13 -3,165332563E-18

[0238] In the 11th embodiment, the equation for the aspherical surface profiles of the aforementioned lens elements is the same as that of the 1st embodiment. The definitions of these parameters shown in Table 11C are also the same as those given in the 1st embodiment, with corresponding values ​​for the 11th embodiment, so explanation thereof will not be repeated.

[0239] In addition, these parameters can be calculated from Table 11A and Table 11B as the following values ​​and satisfy the following conditions: TABLE 11C Schematic parameters f [mm] 4,77 f / R3 0,08 Fno 2,60 f12 / f56 0,52 HFOV [degree] 71,8 f45 / f23 0,97 FOV [degrees] 143,5 f45 / (CT4+T45+CT5) 3,32 TL / lmgH 2,89 f2345 / (CT2+T23+CT3) 0,91 SL / lmgH 1,46 (R3+R4) / (R3-R4) 1,22 SL / TL 0,50 R7 / f3 0,83 TD / f 3,28 SL / f4567 1,01 BL / f 0,35 T12 / T56 1,52 TL / CT2 13,61 T56 / CT5 1,44 TL / CT3 5,22 (T34+CT4) / CT3 0,56 TL / R4 2,94 (TL-SL) / f123 0,16 ATmax / f 0,34 (CT2+T23+CT3) / (CT4+T45+CT5) 1,83 (EPD×SL) / (lmgH×CT4) 1,52 V5 19,5 f / f56 -0,74 V7 25,6 12. Embodiment

[0240] Fig. 23 is a schematic view of an image acquisition unit according to the 12th embodiment of the present disclosure. Fig. Figure 24 shows, in order from left to right, spherical aberration curves, astigmatic field curves, and a distortion curve of the image acquisition unit according to the 12th embodiment. Fig. 23, the image acquisition unit 12 includes the imaging optical lens assembly (the reference numeral of which is omitted) of the present disclosure and an image sensor IS. The imaging optical lens assembly includes, in order from an object side to an image side along an optical axis, a first lens element E1, a second lens element E2, a third lens element E3, an aperture stop ST, a fourth lens element E4, a fifth lens element E5, a stop S1, a sixth lens element E6, a seventh lens element E7, a filter E8, and an image surface IMG. The imaging optical lens assembly includes seven lens elements (E1, E2, E3, E4, E5, E6, and E7), and no additional lens element is disposed between each of the seven adjacent lens elements.

[0241] The first lens element E1 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 first lens element E1 is made of plastic material and has both the object-side surface and the image-side surface aspherical. The object-side surface of the first lens element E1 has an inflection point. The object-side surface of the first lens element E1 has a critical point in an off-axis region thereof.

[0242] The second lens element E2 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 second lens element E2 is made of plastic material and has both the object-side and image-side surfaces aspherical.

[0243] The third lens element E3 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 third lens element E3 is made of plastic material and has both the object-side and image-side surfaces aspherical.

[0244] 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 convex in a paraxial region thereof. The fourth lens element E4 is made of plastic material and has both the object-side and image-side surfaces aspherical.

[0245] The fifth lens element E5 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 fifth lens element E5 is made of plastic and has both the object-side and image-side surfaces aspherical.

[0246] 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 material and has both the object-side surface and the image-side surface aspherical. The object-side surface of the sixth lens element E6 has an inflection point. The image-side surface of the sixth lens element E6 has an inflection point. The object-side surface of the sixth lens element E6 has a critical point in an off-axis region thereof. The image-side surface of the sixth lens element E6 has a critical point in an off-axis region thereof.

[0247] The seventh lens element E7 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 seventh lens element E7 is made of plastic material and has both the object-side surface and the image-side surface aspherical. The object-side surface of the seventh lens element E7 has two inflection points. The image-side surface of the seventh lens element E7 has two inflection points. The object-side surface of the seventh lens element E7 has a critical point in an off-axis region thereof. The image-side surface of the seventh lens element E7 has a critical point in an off-axis region thereof.

[0248] The E8 filter is made of glass and is located between the seventh lens element E7 and the image surface IMG. It does not affect the focal length of the imaging optical lens assembly. The image sensor IS is located on or near the image surface IMG of the imaging optical lens assembly.

[0249] In this embodiment, each value of an Abbe number of the second lens element E2 and an Abbe number of the third lens element E3 is less than 40.0.

[0250] The detailed optical data of the 12th embodiment are shown in Table 12A and the aspherical surface data are shown in Table 12B below. TABLE 12A 12. Embodiment f = 3.18 mm, Fno = 2.80, HFOV = 82.3 degrees Surface # radius of curvature thickness material index Abbé # focal length 0 object infinity 1000,000 1 Lens 1 -123,4568 (ASP) 1,483 plastic 1,534 56,0 -6,06 2 3,3394 (ASP) 1,313 3 Lens 2 -101,8141 (ASP) 0,855 plastic 1,639 23,5 -6,63 4 4,4286 (ASP) 0,184 5 Lens 3 4,4371 (ASP) 2,129 plastic 1,614 25,6 4,50 6 -5,9699 (ASP) 0,271 7 Aperture diaphragm Plano -0,141 8 Lens 4 2,5976 (ASP) 1,139 plastic 1,544 56,0 2,70 9 -2,8486 (ASP) 0,104 10 Lens 5 -7,3982 (ASP) 0,500 plastic 1,669 19,5 -4,10 11 4,4813 (ASP) 0,758 12 aperture Plano 0,000 13 Lens 6 5,9409 (ASP) 0,670 plastic 1,544 56,0 43,40 14 7,6228 (ASP) 0,636 15 Lens 7 8,9711 (ASP) 0,955 plastic 1,534 56,0 -12,38 16 3,6667 (ASP) 0,802 17 filter Plano 0,210 Glass 1,517 64,2 - 18 Plano 0,134 19 Picture Plano - Note: The reference wavelength is 587.6 nm (d-line). An effective radius of the aperture S1 (surface 12) is 1,770 mm. TABLE 12B Aspherical coefficients Surface # 1 2 3 4 k = -9,90000E+01 -2,03735E-01 9,90000E+01 -5,87041E+00 A4 = 6,270004617E-04 -1,222704090E-03 -9,271456309E-03 6,930223861E-03 A6 = -3,097583017E-04 2,680648444E-03 -1,737556511E-03 2,222608026E-02 A8 = 7,701925060E-05 -3,520216275E-03 -7,004778267E-04 -5,098718820E-02 A10 = -9,066958502E-06 2,079482877E-03 2,472244046E-03 7,493767505E-02 A12 = 6,074054055E-07 -7,003623635E-04 -1,640006273E-03 -6,665104361E-02 A14 = -2,386613595E-08 1,432809422E-04 5,433863952E-04 3,654484969E-02 A16 = 5,134996628E-10 -1,651361632E-05 -9,953708739E-05 -1,208711696E-02 A18 = -4,674383535E-12 8,142548181E-07 9,633902464E-06 2,222878289E-03 A20 = - - -3,854489266E-07 -1,748238958E-04 Surface # 5 6 8 9 k = 3,87876E-01 -5,44679E-02 -8,38689E-01 -1,77609E-02 A4 = -1,900122319E-03 1,485276267E-03 1,014845669E-02 1,346100166E-03 A6 = 4,977546679E-03 -5,120681132E-03 4,383161148E-03 -1,695473097E-01 A8 = -4,226665367E-03 7,586831990E-03 -2,153923914E-02 1,203836064E+00 A10 = 1,427787791E-03 -5,498817635E-03 3,558328371E-02 -4,287059281E+00 A12 = -1,563016664E-04 1,593415943E-03 -3,118380477E-02 9,235957183E+00 A14 = - - 9,307599165E-03 -1,282067881E+01 A16 = - - - 1,152377624E+01 A18 = - - - -6,488527251E+00 A20 = - - - 2,081476690E+00 A22 = - - - -2,902299098E-01 Surface # 10 11 13 14 k = -9,55940E+01 -8,63917E+01 -1,69411E+01 -2,73072E+01 A4 = -9,627274076E-02 7,960157208E-02 -1,890564291E-02 -1,715428535E-03 A6 = 1,199453431 E-01 -1,391552057E-01 4,864151176E-02 1,176477165E-02 A8 = -1,413662385E-01 2,524114205E-01 -9,747296521E-02 -1,763697162E-02 A10 = 7,842786511E-02 -3,193474564E-01 1,123831321E-01 1,059456762E-02 A12 = 7,341753350E-04 2,670157053E-01 -8,469836971E-02 -3,369363024E-03 A14 = -3,045487408E-02 -1,386574224E-01 4,283506570E-02 5,060895567E-04 A16 = 1,201996382E-02 4,026597652E-02 -1,450517220E-02 -1,024125226E-05 A18 = - -4,980089367E-03 3,158409707E-03 -5,933405421E-06 A20 = - - -3,984738214E-04 4,966035117E-07 A22 = - - 2,195831740E-05 - Surface # 15 16 k = -8,98636E+01 -4,99086E+00 A4 = -4,252666297E-02 5,535963950E-04 A6 = 1,212276608E-01 -3,805498257E-02 A8 = -3,754617131E-01 3,682519913E-02 A10 = 6,763326277E-01 -2,094783089E-02 A12 = -7,903184627E-01 7,250180624E-03 A14 = 6,313385273E-01 -1,321451905E-03 A16 = -3,544589008E-01 6,302957313E-07 A18 = 1,417723623E-01 6,353894085E-05 A20 = -4,049458818E-02 -1,701548684E-05 A22 = 8,183629292E-03 2,430727339E-06 A24 = -1,141256800E-03 -2,141994679E-07 A26 = 1,043594364E-04 1,166999771 E-08 A28 = -5,626849268E-06 -3,619557794E-10 A30 = 1,355151234E-07 4,902587464E-12

[0251] In the 12th embodiment, the equation of the aspherical surface profiles of the aforementioned lens elements is the same as the equation of the 1st embodiment.

[0252] Also, the definitions of these parameters shown in Table 12C are the same as those given in the 1st Embodiment with corresponding values ​​for the 12th Embodiment, so an explanation thereof will not be given again.

[0253] In addition, these parameters can be calculated from Table 12A and Table 12B as the following values ​​and satisfy the following conditions: TABLE 12C Schematic parameters f [mm] 3,18 f / R3 -0,03 Fno 2,80 f12 / f56 0,62 HFOV [degree] 82,3 f45 / f23 0,52 FOV [degrees] 164,5 f45 / (CT4+T45+CT5) 3,01 TL / lmgH 2,86 f2345 / (CT2+T23+CT3) 1,04 SL / lmgH 1,37 (R3+R4) / (R3-R4) 0,92 SL / TL 0,48 R7 / f3 0,58 TD / f 3,42 SL / f4567 1,16 BL / f 0,36 T12 / T56 1,73 TL / CT2 14,04 T56 / CT5 1,52 TL / CT3 5,64 (T34+CT4) / CT3 0,60 TL / R4 2,71 (TL-SL) / f123 -0,04 ATmax / f 0,41 (CT2+T23+CT3) / (CT4+T45+CT5) 1,82 (EPD×SL) / (lmgH×CT4) 1,37 V5 19,5 f / f56 -0,71 V7 56,0 13. Embodiment

[0254] Fig. 25 is a perspective view of an image sensing unit according to the 13th embodiment of the present disclosure. In this embodiment, an image sensing unit 100 is a camera module including a lens unit 101, a driving device 102, an image sensor 103, and an image stabilizer 104. The lens unit 101 includes the imaging optical lens assembly disclosed in the first embodiment, a barrel, and a holding member (the reference numerals of which are omitted) for holding the imaging optical lens assembly. However, the lens unit 101 may alternatively be provided with the imaging optical lens assembly disclosed in other embodiments of the present disclosure, and the present disclosure is not limited thereto.The imaging light is collimated in the lens unit 101 of the image acquisition unit 100 to form an image with the drive device 102, which is used to focus the image onto the image sensor 103, and the formed image is then digitally transmitted to another electronic component for further processing.

[0255] The drive device 102 can have autofocus functionality, and different drive configurations can be achieved through the use of voice coil motors (VCMs), microelectromechanical systems (MEMS), piezoelectric systems, or shape memory alloy materials. The drive device 102 is advantageous for obtaining a better imaging position of the lens unit 101, so that a clear image of the imaged object can be captured by the lens unit 101 at different object distances. The image sensor 103 (e.g., CCD or CMOS), which can have high light sensitivity and low noise, is arranged on the image surface of the optical lens assembly for imaging to achieve higher image quality.

[0256] The image stabilizer 104, such as an accelerometer, a gyro sensor, and a Hall-effect sensor, is configured to cooperate with the drive device 102 to provide optical image stabilization (OIS). The drive device 102, cooperating with the image stabilizer 104, is useful for compensating for pan and tilt of the lens unit 101 to reduce motion blur during exposure. In some cases, compensation can be provided by electronic image stabilization (EIS) using image processing software, thereby improving image quality in motion or low-light conditions. 14. Embodiment

[0257] Fig. 26 is a perspective view of an electronic device according to the 14th embodiment of the present disclosure. Fig. 27 is another perspective view of the electronic device in Fig. 26.

[0258] In this embodiment, an electronic device 200 is a smartphone that includes the image capturing unit 100 disclosed in the 13th embodiment, an image capturing unit 100a, an image capturing unit 100b, an image capturing unit 100c, and a display unit 201. As shown in Fig. As shown in Figure 26, the image capture unit 100, the image capture unit 100a, and the image capture unit 100b are arranged on the same side of the electronic device 200 and face the same side, and each of the image capture units 100, 100a, and 100b has a single focal point. As shown in Fig. As shown in Figure 27, the image capture unit 100c and the display unit 201 are arranged on opposite sides of the electronic device 200, so that the image capture unit 100c may be a front-facing camera of the electronic device 200 for taking selfies, but the present disclosure is not limited thereto. Furthermore, each of the image capture units 100a, 100b, and 100c may include the imaging optical lens assembly of the present disclosure and have a similar configuration to the image capture unit 100.Specifically, each of the image acquisition units 100a, 100b, and 100c may include a lens unit, a driving device, an image sensor, and an image stabilizer, and each of the lens units may include an imaging optical lens assembly, such as the imaging optical lens assembly of the present disclosure, a tube, and a holding member for holding the imaging optical lens assembly.

[0259] The image capture unit 100 is a wide-angle image capture unit, the image capture unit 100a is a telephoto image capture unit, the image capture unit 100b is an ultra-wide-angle image capture unit, and the image capture unit 100c is a wide-angle image capture unit. In this embodiment, the image capture units 100, 100a, and 100b have different fields of view, so that the electronic device 200 can have different magnification ratios to meet the requirement of optical zoom functionality. Furthermore, as shown in Fig. 27, the image sensing unit 100c may have a non-circular opening, and the lens barrel or lens elements in the image sensing unit 100c may have one or more cut edges at outer diameter positions thereof to conform to the non-circular opening. Therefore, it is advantageous to further reduce the length of the image sensing unit 100c along a single axis, thereby reducing the overall size of the lens, increasing the area ratio of the display unit 201 with respect to the electronic device 200, reducing the thickness of the electronic device 200, and achieving compactness of the overall module. In this embodiment, the electronic device 200 includes a plurality of image sensing units 100, 100a, 100b, and 100c, but the present disclosure is not limited to the number and arrangement of the image sensing units. 15. Embodiment

[0260] Fig. 28 is a perspective view of an electronic device according to the 15th embodiment of the present disclosure. Fig. 29 is another perspective view of the electronic device in Fig. 28. Fig. 30 is a block diagram of the electronic device in Fig. 28.

[0261] In this embodiment, an electronic device 300 is a smartphone that includes the image capture unit 100 disclosed in the 13th embodiment, an image capture unit 100d, an image capture unit 100e, an image capture unit 100f, an image capture unit 100g, a flash module 301, a focus assist module 302, an image signal processor 303, a display module 304, and an image software processor 305. The image capture unit 100 and the image capture unit 100d are arranged on the same side of the electronic device 300. The focus assist module 302 may be a laser distance meter or a time-of-flight module, but the present disclosure is not limited thereto.The image capture unit 100e, the image capture unit 100f, the image capture unit 100g, and the display module 304 are arranged on the opposite side of the electronic device 300. The display module 304 may be a user interface, so the image capture units 100e, 100f, and 100g may be front-facing cameras of the electronic device 300 for taking selfies, but the present disclosure is not limited thereto. Furthermore, each of the image capture units 100d, 100e, 100f, and 100g may include the optical lens assembly for imaging of the present disclosure and have a similar configuration to the image capture unit 100.Specifically, each of the image acquisition units 100d, 100e, 100f, and 100g may include a lens unit, a driving device, an image sensor, and an image stabilizer, and each of the lens units may include an imaging optical lens assembly, such as the imaging optical lens assembly of the present disclosure, a tube, and a holding member for holding the imaging optical lens assembly.

[0262] Image capture unit 100 is a wide-angle image capture unit, image capture unit 100d is an ultra-wide-angle image capture unit, image capture unit 100e is a wide-angle image capture unit, image capture unit 100f is an ultra-wide-angle image capture unit, and image capture unit 100g is a time-of-flight image capture unit. In this embodiment, image capture units 100 and 100d have different fields of view, so that electronic device 300 can have different magnification ratios to meet the requirement of optical zoom functionality. Additionally, image capture unit 100g can determine depth information of the imaged object. In this embodiment, electronic device 300 includes a plurality of image capture units 100, 100d, 100e, 100f, and 100g, but the present disclosure is not limited to the number and arrangement of the image capture units.

[0263] When a user captures images of an object 306, the light beams are focused in the image capture unit 100 or the image capture unit 100d to create images, and the flash module 301 is activated to provide light assistance. The focus assist module 302 detects the object distance of the imaged object 306 to achieve fast autofocus. The image signal processor 303 is configured to optimize the captured image to improve image quality. The light beam emitted by the focus assist module 302 can be either conventional infrared light or laser light. Additionally, the light beams can be focused in the image capture unit 100e, 100f, or 100g to create images. The display module 304 can include a touchscreen, and the user can interact with the display module 304 and the image software processor 305, which has several functions for capturing images and performing image processing.Alternatively, the user can capture images using a physical button. The image processed by the image software processor 305 can be displayed on the display module 304. 16. Embodiment

[0264] Fig. 31 is a perspective view of an electronic device according to the 16th embodiment of the present disclosure.

[0265] In this embodiment, an electronic device 400 is a smartphone that includes the image capture unit 100 disclosed in the 13th embodiment, an image capture unit 100h, an image capture unit 100i, a flash module 401, a focus assist module, an image signal processor, a display module, and an image software processor (not shown). The image capture unit 100, the image capture unit 100h, and the image capture unit 100i are arranged on the same side of the electronic device 400, while the display module is arranged on the opposite side of the electronic device 400. Furthermore, each of the image capture units 100h and 100i may include the optical lens assembly for imaging of the present disclosure and have a similar configuration to the image capture unit 100, the details of which will not be repeated.

[0266] The image capture unit 100 is a wide-angle image capture unit, the image capture unit 100h is a telephoto image capture unit, and the image capture unit 100i is an ultra-wide-angle image capture unit. In this embodiment, the image capture units 100, 100h, and 100i have different fields of view, so that the electronic device 400 can have different magnification ratios to meet the requirement of optical zoom functionality. Furthermore, the image capture unit 100h can be a telephoto image capture unit with a light-deflecting element configuration, so that the total path length of the image capture unit 100h is not limited by the thickness of the electronic device 400. Furthermore, the light-deflecting element configuration of the image capture unit 100h can, for example, be one of the Fig. 35 to Fig. 37 shown structures, which can be accessed with reference to the above descriptions. Fig. 35 to Fig. 37, and the details thereof will not be repeated. In this embodiment, the electronic device 400 includes a plurality of image capture units 100, 100h, and 100i, but the present disclosure is not limited to the number and arrangement of the image capture units. When a user captures images of an object, light beams are condensed in the image capture unit 100, 100h, or 100i to form images, and the flash module 401 is activated for light support. Furthermore, the subsequent processes are performed similarly to the above-mentioned embodiment, so the details thereof will not be repeated. 17. Embodiment

[0267] Fig. 32 is a perspective view of an electronic device according to the 17th embodiment of the present disclosure.

[0268] In this embodiment, an electronic device 500 is a smartphone that includes the image capture unit 100 disclosed in the 13th embodiment, an image capture unit 100j, an image capture unit 100k, an image capture unit 100m, an image capture unit 100n, an image capture unit 100p, an image capture unit 100q, an image capture unit 100r, an image capture unit 100s, a flash module 501, a focus assist module, an image signal processor, a display module, and an image software processor (not shown). The image capture units 100, 100j, 100k, 100m, 100n, 100p, 100q, 100r and 100s are arranged on the same side of the electronic device 500, while the display module is arranged on the opposite side of the electronic device 500.Furthermore, each of the image acquisition units 100j, 100k, 100m, 100n, 100p, 100q, 100r, and 100s may include the imaging optical lens assembly of the present disclosure and have a similar configuration to the image acquisition unit 100, the details of which will not be repeated.

[0269] The image capture unit 100 is a wide-angle image capture unit, the image capture unit 100j is a telephoto image capture unit, the image capture unit 100k is a telephoto image capture unit, the image capture unit 100m is a wide-angle image capture unit, the image capture unit 100n is an ultra-wide-angle image capture unit, the image capture unit 100p is an ultra-wide-angle image capture unit, the image capture unit 100q is a telephoto image capture unit, the image capture unit 100r is a telephoto image capture unit, and the image capture unit 100s is a time-of-flight image capture unit. In this embodiment, the image capture units 100, 100j, 100k, 100m, 100n, 100p, 100q, and 100r have different fields of view so that the electronic device 500 can have different magnification ratios to meet the requirement of optical zoom functionality.Furthermore, each of the image capture units 100j and 100k may be a telephoto image capture unit with a light-deflecting element configuration. Furthermore, the light-folding element configuration of each of the image capture units 100j and 100k may, for example, be one of the configurations shown in FIG. Fig. 35 to Fig. 37 shown structures, which in the above descriptions are referred to as Fig. 35 to Fig. 37, and the related details will not be repeated. Furthermore, the image capture unit 100s can determine depth information of the imaged object. In this embodiment, the electronic device 500 includes a plurality of image capture units 100, 100j, 100k, 100m, 100n, 100p, 100q, 100r, and 100s, but the present disclosure is not limited to the number and arrangement of the image capture units. When a user captures images of an object, the light beams converge in the image capture unit 100, 100j, 100k, 100m, 100n, 100p, 100q, 100r, or 100s to form images, and the flash module 501 is activated for light assistance. Furthermore, the subsequent processes are performed in a similar manner to the above-mentioned embodiments, and the details thereof will not be given again. 18. Embodiment

[0270] Fig.33 is a schematic view of an electronic device according to the 18th embodiment of the present disclosure.

[0271] In this embodiment, an electronic device 600 may be a lightweight unmanned aerial vehicle, such as a drone camera. The electronic device 600 includes an image capture unit 601. The image capture unit 601 includes the optical lens assembly for imaging disclosed in the first embodiment. The image capture unit 601 may be a wide-angle image capture unit. The image capture unit 601, which is similar to the image capture unit 100, may further include a tube, a support member, or a combination thereof. The electronic device 600 captures an image through the image capture unit 601. Preferably, the electronic device may further include a control unit, a display unit, a storage unit, a random access memory unit (RAM), or a combination thereof.

[0272] The smartphone in several embodiments serves only as an example to show the image acquisition unit of the present disclosure installed in an electronic device, and the present disclosure is not limited thereto. The image acquisition unit can optionally be applied to optical systems with a movable focus. Furthermore, the imaging optical lens assembly of the image acquisition unit has good aberration correction capability and high image quality, and can be used for 3D image acquisition applications (three-dimensional image acquisition applications) in products such as digital cameras, mobile devices, digital tablets, smart TVs, network monitoring devices, dashboard cameras, vehicle rearview cameras, multi-camera devices, image recognition systems, motion sensor input devices, wearable devices, and other electronic imaging devices.

[0273] The foregoing description has been described with reference to specific embodiments for the purpose of illustration. It should be noted that TABLES 1A-12C show different data of the various embodiments; however, the data of the various embodiments were obtained from experiments. The embodiments were chosen and described in order to best explain the principles of the disclosure and their practical applications to enable others skilled in the art to best utilize the disclosure and various embodiments with various modifications as are suited to particular uses. The above-illustrated embodiments and the accompanying drawings are exemplary and are not intended to be exhaustive or to limit the scope of the present disclosure to the precise forms disclosed. Many modifications and variations are possible in light of the above teachings.

Claims

[1] An optical lens assembly for imaging, comprising seven lens elements, the seven lens elements being, 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), a sixth lens element (E6), and a seventh lens element (E7), each of the seven lens elements having an object-side surface facing the object side and an image-side surface facing the image side; wherein the first lens element (E1) has a negative refractive power, the second lens element (E2) has a negative refractive power, the image-side surface of the second lens element (E2) is concave in a paraxial region thereof, the fifth lens element (E5) has a negative refractive power, the image-side surface of the fifth lens element (E5) is concave in a paraxial region thereof, the image-side surface of the sixth lens element (E6) is concave in a paraxial region thereof, the image-side surface of the seventh lens element (E7) is concave in a paraxial region thereof, and the image-side surface of the seventh lens element (E7) has at least one inflection point; wherein an axial distance between the object-side surface of the first lens element (E1) and the image-side surface of the seventh lens element (E7) is TD, a focal length of the optical lens assembly for imaging is f, an axial distance between the object-side surface of the first lens element (E1) and an image surface (IMG) is TL, a central thickness of the third lens element (E3) is CT3, and the following conditions are met: 2.00 <TD / f<5,20; und 3.00 <TL / CT3<8,00. [2] An optical lens assembly for imaging according to claim 1, wherein the image-side surface of the fourth lens element (E4) is convex in a paraxial region thereof; wherein a radius of curvature of the object-side surface of the fourth lens element (E4) is R7, a focal length of the third lens element (E3) is f3, and the following condition is satisfied: 0.30 <RF / f3<1,10. [3] An imaging optical lens assembly according to claim 1, wherein the seventh lens element (E7) has a negative refractive power; wherein an axial distance between the first lens element (E1) and the second lens element (E2) is T12, an axial distance between the fifth lens element (E5) and the sixth lens element (E6) is T56, and the following condition is satisfied: 0.25 <T12 / T56<4,00. [4] The imaging optical lens assembly according to claim 1, wherein a maximum field of view of the imaging optical lens assembly is FOV, the axial distance between the object-side surface of the first lens element (E1) and the image surface (IMG) is TL, a radius of curvature of the image-side surface of the second lens element (E2) is R4, and the following conditions are satisfied: 110.0 degrees <FOV<190,0 Grad; und 0.10 <TL / R4<12,00. [5] An imaging optical lens assembly according to claim 1, wherein a maximum value among the axial distances between each of all adjacent lens elements of the imaging optical lens assembly is ATmax, the focal length of the imaging optical lens assembly is f, and the following condition is satisfied: 0.23 <ATmax / f<0,80. [6] An imaging optical lens assembly according to claim 1, wherein an axial distance between the image-side surface of the seventh lens element (E7) and the image surface (IMG) is BL, the focal length of the imaging optical lens assembly is f, and the following condition is satisfied: 0.00 <BL / f<0,90. [7] An optical lens assembly for imaging according to claim 1, wherein a radius of curvature of the object-side surface of the second lens element (E2) is R3, a radius of curvature of the image-side surface of the second lens element (E2) is R4, and the following condition is satisfied: 0.00<(R3+R4) / (R3−R4)<10.

00. [8] An imaging optical lens assembly according to claim 1, further comprising an aperture stop (ST), wherein an axial distance between the aperture stop (ST) and the image surface (IMG) is SL, the axial distance between the object-side surface of the first lens element (E1) and the image surface (IMG) is TL, and the following condition is satisfied: 0.35 <SL / TL<0,65. [9] An 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 surface (IMG) is TL, a central thickness of the second lens element (E2) is CT2, and the following condition is satisfied: 11.00 <TL / CT2<20,00. [10] Image acquisition unit (100) comprising: the optical lens assembly for imaging according to claim 1; and an image sensor (103) arranged on the image surface (IMG) of the optical lens assembly for imaging. [11] Electronic device (200) comprising: the image capture unit (100) according to claim 10. [12] An optical lens assembly for imaging, comprising seven lens elements, the seven lens elements being, 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), a sixth lens element (E6), and a seventh lens element (E7), each of the seven lens elements having an object-side surface facing the object side and an image-side surface facing the image side; wherein the first lens element (E1) has a negative refractive power, the image-side surface of the second lens element (E2) is concave in a paraxial region thereof, the fifth lens element (E5) has a negative refractive power, the image-side surface of the fifth lens element (E5) is concave in a paraxial region thereof, the image-side surface of the sixth lens element (E6) is concave in a paraxial region thereof, the image-side surface of the seventh lens element (E7) is concave in a paraxial region thereof, and the image-side surface of the seventh lens element (E7) has at least one inflection point; wherein an axial distance between the object-side surface of the first lens element (E1) and the image-side surface of the seventh lens element (E7) is TD, a focal length of the imaging optical lens assembly is f, a maximum value among the axial distances between each of all adjacent lens elements of the imaging optical lens assembly is ATmax, a radius of curvature of the object-side surface of the second lens assembly (E2) is R3, a radius of curvature of the image-side surface of the second lens assembly (E2) is R4, and the following conditions are satisfied: 2.00 <TD / f<6,00; 0.20 <ATmax / f<6,00; 0.00<(R3+R4) / (R3−R4)<10.

00. [13] An imaging optical lens assembly according to claim 12, wherein the image-side surface of the first lens element (E1) is concave in a paraxial region thereof and the object-side surface of the third lens element (E3) is convex in a paraxial region thereof. [14] An imaging optical lens assembly according to claim 12, wherein the second lens element (E2) has a negative refractive power; wherein the optical lens assembly for imaging further comprises an aperture stop (ST), an axial distance between the object-side surface of the first lens element (E1) and an image surface (IMG) is TL, a central thickness of the second lens element (E2) is CT2, an axial distance between the aperture stop (ST) and the image surface (IMG) is SL, a maximum image height of the optical lens assembly for imaging is ImgH, and the following conditions are met: 11.00 <TL / CT2<20,00; und 1.20 <SL / lmgH<1,70. [15] An imaging optical lens assembly according to claim 12, wherein an axial distance between the object-side surface of the first lens element (E1) and an image surface (IMG) is TL, a maximum image height of the imaging optical lens assembly is ImgH, a maximum field of view of the imaging optical lens assembly is FOV, and the following conditions are satisfied: 2.00 <TL / lmgh<4,00; und 110.0 degrees <FOV<190,0 Grad. [16] An imaging optical lens assembly according to claim 12, wherein an axial distance between the third lens element (E3) and the fourth lens element (E4) is T34, 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 condition is satisfied: 0.25<(T34+CT4) / CT3<0.

90. [17] An imaging optical lens assembly according to claim 12, wherein an axial distance between the fifth lens element (E5) and the sixth lens element (E6) is T56, a central thickness of the fifth lens element (E5) is CT5, and the following condition is satisfied: 0.10 <T56 / CT5<5,00. [18] An imaging optical lens assembly according to claim 12, wherein an axial distance between the object-side surface of the first lens element (E1) and an image surface (IMG) is TL, a central thickness of the third lens element (E3) is CT3, and the following condition is satisfied: 4.00 <TL / CT3<6,50. [19] An imaging optical lens assembly according to claim 12, wherein an Abbe number of the fifth lens element (E5) is V5 and the following condition is satisfied: 5.00 <V5<40,0. [20] An imaging optical lens assembly according to claim 12, wherein an Abbe number of the seventh lens element (E7) is V7, the focal length of the imaging optical lens assembly is f, a combined focal length of the fifth lens element (E5) and the sixth lens element (E6) is f56, and the following conditions are satisfied: 5.00 <V7<40,0; und −2.50 <f / f56<0,00. [21] An optical lens assembly for imaging, comprising seven lens elements, the seven lens elements being, 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), a sixth lens element (E6), and a seventh lens element (E7), each of the seven lens elements having an object-side surface facing the object side and an image-side surface facing the image side; wherein the first lens element (E1) has a negative refractive power, the second lens element (E2) has a negative refractive power, the image-side surface of the second lens element (E2) is concave in a paraxial region thereof, the fifth lens element (E5) has a negative refractive power, the image-side surface of the fifth lens element (E5) is concave in a paraxial region thereof, the image-side surface of the sixth lens element (E6) is concave in a paraxial region thereof, the image-side surface of the seventh lens element (E7) is concave in a paraxial region thereof, and the image-side surface of the seventh lens element (E7) has at least one inflection point; wherein an axial distance between the object-side surface of the first lens element (E1) and the image-side surface of the seventh lens element (E7) is TD, a focal length of the optical lens assembly for imaging is f, a combined focal length of the second lens element (E2), the third lens element (E3), the fourth lens element (E4), and the fifth lens element (E5) is f2345, a central thickness of the second lens element (E2) is CT2, a central thickness of the third lens element (E3) is CT3, an axial distance between the second lens element (E2) and the third lens element (E3) is T23, and the following conditions are met: 2.00 <TD / f<5,20; und 0.80 <f2345 / (CT2+T23+CT3)<1,60. [22] An imaging optical lens assembly according to claim 21, wherein a composite focal length of the second lens element (E2) and the third lens element (E3) is f23, a composite focal length of the fourth lens element (E4) and the fifth lens element (E5) is f45, and the following condition is satisfied: 0.00 <f45 / f23<2,00. [23] An imaging optical lens assembly according to claim 21, further comprising an aperture stop (ST), wherein an axial distance between the object-side surface of the first lens element (E1) and an image surface (IMG) is TL, an axial distance between the aperture stop (ST) and the image surface (IMG) is SL, a combined focal length of the first lens element (E1), the second lens element (E2) and the third lens element (E3) is f123, and the following condition is satisfied: −2.00<(TL−SL) / f123<2.

00. [24] An imaging optical lens assembly according to claim 21, further comprising an aperture stop (ST), wherein an axial distance between the aperture stop (ST) and an image surface (IMG) is SL, a composite focal length of the fourth lens element (E4), the fifth lens element (E5), the sixth lens element (E6) and the seventh lens element (E7) is f4567, and the following condition is satisfied: 0.00 <SL / f4567<2,20. [25] An imaging optical lens assembly according to claim 21, wherein a composite focal length of the first lens element (E1) and the second lens element (E2) is f12, a composite focal length of the fifth lens element (E5) and the sixth lens element (E6) is f56, and the following condition is satisfied: 0.20 <f12 / f56<1,30. [26] The imaging optical lens assembly according to claim 21, further comprising an aperture stop (ST), wherein an entrance pupil diameter of the imaging optical lens assembly is EPD, an axial distance between the aperture stop (ST) and an image surface (IMG) is SL, a maximum image height of the imaging optical lens assembly is ImgH, a central thickness of the fourth lens element (E4) is CT4, and the following condition is satisfied: 0.50<(EPD×SL) / (ImgH×CT4)<2.

50. [27] The imaging optical lens assembly according to claim 21, wherein the central thickness of the second lens element (E2) is CT2, the central thickness of the third lens element (E3) is CT3, a central thickness of the fourth lens element (E4) is CT4, a central thickness of the fifth lens element (E5) is CT5, the axial distance between the second lens element (E2) and the third lens element (E3) is T23, an axial distance between the fourth lens element (E4) and the fifth lens element (E5) is T45, the focal length of the imaging optical lens assembly is f, a radius of curvature of the object-side surface of the second lens element (E2) is R3, and the following conditions are satisfied: 1.40<(CT2+T23+CT3) / (CT4+T45+CT5)<2.60; and −0.5 <f / R3<0,5. [28] An imaging optical lens assembly according to claim 21, wherein a compound focal length of the fourth lens element (E4) and the fifth lens element (E5) is f45, a central thickness of the fourth lens element (E4) is CT4, a central thickness of the fifth lens element (E5) is CT5, an axial distance between the fourth lens element (E4) and the fifth lens element (E5) is T45, and the following condition is satisfied: 2.00 <f45 / (CT4+T45+CT5)<7,00. [29] An imaging optical lens assembly according to claim 21, wherein each of at least two of an Abbe number of the second lens element (E2), an Abbe number of the third lens element (E3) and an Abbe number of the sixth lens element (E6) is less than 40.

0. [30] The imaging optical lens assembly according to claim 21, wherein the axial distance between the object-side surface of the first lens element (E1) and the image-side surface of the seventh lens element (E7) is TD, the focal length of the imaging optical lens assembly is f, an axial distance between the object-side surface of the first lens element (E1) and an image surface (IMG) is TL, the central thickness of the second lens element (E2) is CT2, the central thickness of the third lens element (E3) is CT3, a maximum value among the axial distances between each of all adjacent lens elements of the imaging optical lens assembly is ATmax, a radius of curvature of the object-side surface of the second lens element (E2) is R3, a radius of curvature of the image-side surface of the second lens element (E2) is R4, the compound focal length of the second lens element (E2), the third lens element (E3),the fourth lens element (E4) and the fifth lens element (E5) is f2345, the axial distance between the second lens element (E2) and the third lens element (E3) is T23, and the following conditions are met:, 2.86≤TD / f≤4.95; 4.73≤TL / CT3≤5.73; 0.31≤ATmax / f≤0.61; 0.70≤(R3+R4) / (R3−R4)≤4.15; and 0.89≤f2345 / (CT2+T23+CT3)≤1.10.

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