Optical image acquisition system, image acquisition unit and electronic device

Abstract

Optical image acquisition system comprising seven lens elements (E1, E2, E3, E4, E5, E6, E7), wherein the seven lens elements (E1, E2, E3, E4, E5, E6, E7) are arranged in sequence from an object side to an image side along a ray path as 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), and each of the seven lens elements (E1, E2, E3, E4, E5, E6, E7) has an object-side surface facing the object side and an image-side surface facing the image side; wherein the third lens element (E3) has a negative refractive power, the object-side surface of the fifth lens element (E5) is concave in a paraxial region thereof, the sixth lens element (E6) has a positive refractive power, the seventh lens element (E7) has a negative refractive power, the object-side surface of the seventh lens element (E7) is convex in a paraxial region thereof, and the image-side surface of the seventh lens element (E7) is concave in a paraxial region thereof and has at least one inflection point (P); where TL is an axial distance between the object-side surface of the first lens element (E1) and an image surface (IMG), R1 is a radius of curvature of the object-side surface of the first lens element (E1), R3 is a radius of curvature of the object-side surface of the second lens element (E2), T12 is an axial distance between the first lens element (E1) and the second lens element (E2), T23 is an axial distance between the second lens element (E2) and the third lens element (E3), T34 is an axial distance between the third lens element (E3) and the fourth lens element (E4), T45 is an axial distance between the fourth lens element (E4) and the fifth lens element (E5), T56 is an axial distance between the fifth lens element (E5) and the sixth lens element (E6), and T56 is an axial distance between the sixth lens element (E6) and the seventh lens element (E7). T67 is, and the following conditions are met: − 2.50 < TL / R 1 < 1.00 ; − 2,50 < TL / R 3 < 1,70 ; und 0,00 < ( T 12 + T 23 + T 56 + T 67 ) / ( T 34 + T 45 ) < 0,70.

Description

BACKGROUND Subject area

[0001] The present disclosure relates to an optical image acquisition system, an image acquisition unit and an electronic device, in particular an optical image acquisition system and an image acquisition 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 decreased. Therefore, high image quality is now one of the essential features of an optical system.

[0003] Furthermore, due to rapid technological advancements, electronic devices equipped with optical systems are increasingly becoming multifunctional for various applications, thereby raising the bar for the functionality of these optical systems. However, for a conventional optical system, it is challenging to strike a balance between requirements such as high image quality, low sensitivity, appropriate aperture, miniaturization, and a desirable field of view. SUMMARY

[0004] According to one aspect of the present disclosure, an optical image-capturing system comprises seven lens elements. The seven lens elements are, in order from an object side to an image side along a beam 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 third lens element has a negative refractive power. Preferably, the object-side surface of the fifth lens element is concave in a paraxial region. Preferably, the sixth lens element has a positive refractive power. Preferably, the seventh lens element has a negative refractive power. Preferably, the object-side surface of the seventh lens element is convex in a paraxial region. Preferably, the image-side surface of the seventh lens element is concave in a paraxial region. Preferably, the image-side surface of the seventh lens element has at least one inflection point.

[0006] If an axial distance between the object-side surface of the first lens element and an image surface is TL, a radius of curvature of the object-side surface of the first lens element is R1, a radius of curvature of the object-side surface of the second lens element is R3, an axial distance between the first lens element and the second lens element is T12, an axial distance between the second lens element and the third lens element is T23, an axial distance between the third lens element and the fourth lens element is T34, an axial distance between the fourth lens element and the fifth lens element is T45, an axial distance between the fifth lens element and the sixth lens element is T56, and an axial distance between the sixth lens element and the seventh lens element is T67, then the following conditions are preferably met: -2.50 <TL / R1<1,00; -2.50 <TL / R3<1,70; und 0.00<(T12+T23+T56+T67) / (T34+T45)<0.70.

[0007] According to another aspect of the present disclosure, an optical image-capturing system comprises seven lens elements. The seven lens elements are, in order from an object side to an image side along a beam 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 image-side surface of the second lens element is convex in a paraxial region. Preferably, the third lens element has a negative refractive power. Preferably, the fifth lens element has a negative refractive power. Preferably, the object-side surface of the fifth lens element is concave in a paraxial region. Preferably, the image-side surface of the fifth lens element is convex in a paraxial region. Preferably, the seventh lens element has a negative refractive power. Preferably, the image-side surface of the seventh lens element has at least one inflection point.

[0009] If an axial distance between the object-side surface of the first lens element and an image surface is TL, a radius of curvature of the object-side surface of the first lens element is R1, a radius of curvature of the object-side surface of the second lens element is R3, a focal length of the sixth lens element is f6, a focal length of the seventh lens element is f7, an axial distance between the fourth lens element and the fifth lens element is T45, and an axial distance between the sixth lens element and the seventh lens element is T67, then the following conditions are preferably met: -2.20 <TL / R1<1,00; -2.50 <TL / R3<2,00; 0.00 < |f6 / f7| < 1.00; and 0.00 <T67 / T45<0,80.

[0010] According to another aspect of the present disclosure, an optical image-capturing system comprises seven lens elements. The seven lens elements are, in order from an object side to an image side along a beam 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 object-side surface of the first lens element is concave in a paraxial region. Preferably, the object-side surface of the second lens element is concave in a paraxial region. Preferably, the third lens element has a negative refractive power. Preferably, the object-side surface of the fifth lens element is concave in a paraxial region. Preferably, the image-side surface of the fifth lens element is convex in a paraxial region. Preferably, the sixth lens element has a positive refractive power. Preferably, the image-side surface of the seventh lens element has at least one inflection point.

[0012] If an axial distance between the object-side surface of the first lens element and an image surface TL is, a radius of curvature of the object-side surface of the first lens element is R1, and a radius of curvature of the object-side surface of the second lens element is R3, then preferably the following conditions are met: TL / R1<0.00; and TL / R3<0.00.

[0013] According to another aspect of the present disclosure, an image acquisition unit comprises one of the aforementioned optical image acquisition systems and an image sensor, wherein the image sensor is arranged on the image surface of the optical image acquisition system.

[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 by reading the following detailed description of the embodiments with reference to the accompanying drawings: Fig. Figure 1 is a schematic view of an image acquisition unit according to the first embodiment of the present disclosure; Fig. Figure 2 shows spherical aberration curves, astigmatic field curves and a distortion curve of the image acquisition unit according to the first embodiment; Fig. Figure 3 is a schematic view of an image acquisition unit according to the second embodiment of the present disclosure; Fig. Figure 4 shows spherical aberration curves, astigmatic field curves and a distortion curve of the image acquisition unit according to the second embodiment; Fig. Figure 5 is a schematic view of an image acquisition unit according to the 3rd embodiment of the present disclosure; Fig.Figure 6 shows spherical aberration curves, astigmatic field curves and a distortion curve of the image acquisition unit according to the 3rd embodiment; Fig. Figure 7 is a schematic view of an image acquisition unit according to the 4th embodiment of the present disclosure; Fig. Figure 8 shows spherical aberration curves, astigmatic field curves and a distortion curve of the image acquisition unit according to the 4th embodiment; Fig. Figure 9 is a schematic view of an image acquisition unit according to the 5th embodiment of the present disclosure; Fig. Figure 10 shows spherical aberration curves, astigmatic field curves and a distortion curve of the image acquisition unit according to the 5th embodiment; Fig. Figure 11 is a schematic view of an image acquisition unit according to the 6th embodiment of the present disclosure; Fig.Figure 12 shows spherical aberration curves, astigmatic field curves and a distortion curve of the image acquisition unit according to the 6th embodiment; Fig. Figure 13 is a schematic view of an image acquisition unit according to the 7th embodiment of the present disclosure; Fig. Figure 14 shows spherical aberration curves, astigmatic field curves and a distortion curve of the image acquisition unit according to the 7th embodiment; Fig. Figure 15 is a schematic view of an image acquisition unit according to the 8th embodiment of the present disclosure; Fig. Figure 16 shows spherical aberration curves, astigmatic field curves and a distortion curve of the image acquisition unit according to the 8th embodiment; Fig. Figure 17 is a schematic view of an image acquisition unit according to the 9th embodiment of the present disclosure; Fig.Figure 18 shows spherical aberration curves, astigmatic field curves and a distortion curve of the image acquisition unit according to the 9th embodiment; Fig. Figure 19 is a schematic view of an image acquisition unit according to the 10th embodiment of the present disclosure; Fig. Figure 20 shows spherical aberration curves, astigmatic field curves and a distortion curve of the image acquisition unit according to the 10th embodiment; Fig. Figure 21 is a schematic view of an image acquisition unit according to the 11th embodiment of the present disclosure; Fig. Figure 22 shows spherical aberration curves, astigmatic field curves and a distortion curve of the image acquisition unit according to the 11th embodiment; Fig. Figure 23 is a schematic view of an image acquisition unit according to the 12th embodiment of the present disclosure; Fig.Figure 24 shows spherical aberration curves, astigmatic field curves and a distortion curve of the image acquisition unit according to the 12th embodiment; Fig. Figure 25 is a perspective view of an image acquisition unit according to the 13th embodiment of the present disclosure; Fig. Figure 26 is a perspective view of an electronic device according to the 14th embodiment of the present disclosure; Fig. Figure 27 is another perspective view of the electronic device in Fig. 26; Fig. Figure 28 is a perspective view of an electronic device according to the 15th embodiment of the present disclosure; Fig. Figure 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.Figure 31 is a perspective view of an electronic device according to the 16th embodiment of the present disclosure; Fig. Figure 32 is a perspective view of an electronic device according to the 17th embodiment of the present disclosure; Fig. Figure 33 is a schematic view of an electronic device according to the 18th embodiment of the present disclosure; Fig. Figure 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. Figure 35 shows a schematic view of Y2R1 and Y7R2 according to the first embodiment of the present disclosure; Fig. Figure 36 shows a schematic view of a configuration of a light deflection element in an optical image acquisition system according to an embodiment of the present disclosure; Fig.Figure 37 shows a schematic view of a further configuration of a light deflection element in an optical image acquisition system according to an embodiment of the present disclosure; and Fig. Figure 38 shows a schematic view of a configuration of two light deflection elements in an optical image acquisition system according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0016] An optical image acquisition system comprises seven lens elements. The seven lens elements are, in order from one object side to one image side along a beam 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 object-side surface of the first lens element can be concave in a paraxial region. This is advantageous for adjusting the refractive power and field of view of the first lens element. The image-side surface of the first lens element can be convex in a paraxial region. This is advantageous for increasing the field of view of the optical imaging system and adjusting the refractive power of the first lens element.

[0018] The object-side surface of the second lens element can be concave in a paraxial region. This is advantageous for interacting with the lens shape of the first lens element, thereby improving the light focusing quality. The image-side surface of the second lens element can be convex in a paraxial region. This is advantageous for controlling the propagation direction of the light path, thus preventing total internal reflection due to excessive deflection angles.

[0019] The third lens element can have a negative refractive power. Therefore, it is advantageous to compensate for aberrations caused by the first and second lens elements. The image-side surface of the third lens element can be concave in a paraxial region. Therefore, it is advantageous to adjust the propagation direction of the light path and thereby increase the image area.

[0020] The fourth lens element can have a positive refractive power. Therefore, this is advantageous for reducing the overall size and increasing the light-focusing capability of the optical imaging system. The image-side surface of the fourth lens element can be convex in a paraxial region. Therefore, this is advantageous for controlling the size of the light beam in the peripheral field of view, thereby correcting vignetting and distortion at the image edges.

[0021] The fifth lens element can have a negative refractive power. Therefore, this is advantageous for reducing spherical aberration in the optical image acquisition system. The object-side surface of the fifth lens element can be concave. Therefore, this is advantageous for increasing the negative refractive power of the fifth lens element and correcting chromatic aberration in the optical image acquisition system. The image-side surface of the fifth lens element can be convex in a paraxial region. Therefore, this is advantageous for correcting aberrations in the optical image acquisition system to maintain good image quality.

[0022] The sixth lens element can have a positive refractive power. Therefore, it is advantageous for achieving sufficient light focusing capability at the image end of the optical imaging system. The image-side surface of the sixth lens element can be convex in a paraxial region. Therefore, it is advantageous for reducing the back focal length of the optical imaging system.

[0023] The seventh lens element can have a negative refractive power. Therefore, it is advantageous to compensate for the refractive power at the image end of the optical imaging system, thereby improving the focusing quality of light from different fields of view onto the image surface and correcting aberrations. The object-side surface of the seventh lens element can be convex in a paraxial region. Therefore, it is advantageous to adjust the lens shape of the seventh lens element and thereby correct off-axis curvature of the image field. The image-side surface of the seventh lens element can be concave in a paraxial region. Therefore, it is advantageous to adjust the lens shape of the seventh lens element and thereby adjust the back focal length.

[0024] According to the present disclosure, the image-side surface of the seventh lens element can have at least one inflection point. Therefore, it is advantageous to correct the image field curvature and distortion of the optical image acquisition system while simultaneously reducing the overall path length of the optical image acquisition system. See Fig.Figure 34, which shows a schematic view of an inflection point P on the image-side surface of the seventh lens element E7 according to the first embodiment of the present disclosure. The aforementioned inflection point P on the image-side surface of the seventh lens element E7, as well as inflection points P on the object-side surface of the first lens element E1, the image-side surface of the first lens element E1, the object-side surface of the second lens element E2, the object-side surface of the third lens element E3, the image-side surface of the third lens element E3, the object-side surface of the fifth lens element E5, the image-side surface of the fifth lens element E5, 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.Figure 34 are examples. Each of the lens surfaces in different embodiments of the present disclosure may also have one or more inflection points in an off-axis region thereof.

[0025] According to the present disclosure, the image-side surface of the seventh lens element can have at least one critical point in an off-axis region thereof. Therefore, it is advantageous to control aberrations at the edge of the image while simultaneously reducing the overall size of the optical imaging system. See Fig.Figure 34 shows a schematic view of a critical point C on the image-side surface of the seventh lens element E7 according to the first embodiment of the present disclosure. The aforementioned critical point C on the image-side surface of the seventh lens element E7, as well as critical points C on the object-side surface of the third lens element E3, the object-side surface of the fifth lens element E5, the image-side surface of the fifth lens element E5, 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. Figure 34 are examples. Each of the lens surfaces in different embodiments of the present disclosure may also have one or more critical points in an off-axis region thereof.

[0026] If 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 object-side surface of the first lens element is R1, the following condition can be satisfied: -2.50 < TL / R1 < 1.00. Therefore, it is advantageous to adjust the ratio of the total path length of the optical imaging system to the radius of curvature of the object-side surface of the first lens element, thereby adjusting the field of view. Furthermore, the following conditions can also be satisfied: -2.20 < TL / R1 < 1.00. Furthermore, the following conditions can also be satisfied: -2.10 < TL / R1 < 0.80. Furthermore, the following conditions can also be satisfied: -2.00 < TL / R1 < 0.70. Furthermore, the following condition can also be satisfied: -1.95 ≤ TL / R1 ≤ 0.61. Furthermore, the following condition can also be met: TL / R1 < 0.00.

[0027] If 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 object-side surface of the second lens element is R3, the following condition can be met: -2.50 < TL / R3 < 2.00. Therefore, it is advantageous to adjust the ratio of the total path length of the optical imaging system to the radius of curvature of the object-side surface of the second lens element, thereby adapting the lens shape and refractive power of the second lens element to improve image quality in the central image area. Furthermore, the following conditions can also be met: -2.50 < TL / R3 < 1.70. Additionally, the following conditions can also be met: -2.30 < TL / R3 < 1.90. Furthermore, the following condition can also be met: -2.20 < TL / R3 < 1.70. Furthermore, the following condition can also be met: -2.14 ≤ TL / R3 ≤ 1.58.Furthermore, the following condition can also be met: TL / R3 < 0.00.

[0028] If the axial distance between the first and second lens elements is T12, the axial distance between the second and third lens elements is T23, the axial distance between the third and fourth lens elements is T34, the axial distance between the fourth and fifth lens elements is T45, the axial distance between the fifth and sixth lens elements is T56, and the axial distance between the sixth and seventh lens elements is T67, then the following condition can be met: 0.00 < (T12+T23+T56+T67) / (T34+T45) < 0.70. Therefore, this is advantageous for the balance of the lens distribution of the optical imaging system. Furthermore, the following condition can also be met: 0.00 < (T12+T23+T56+T67) / (T34+T45) < 0.60. Furthermore, the following condition can also be met: 0.10 < (T12+T23+T56+T67) / (T34+T45) < 0.55.Furthermore, the following condition can also be met: 0.13 ≤ (T12+T23+T56+T67) / (T34+T45) ≤ 0.49.

[0029] If the focal length of the sixth lens element is f6 and the focal length of the seventh lens element is f7, the following condition can be satisfied: 0.00 < |f6 / f7| < 1.00. Therefore, this is advantageous for compensating for the refractive power arrangement at the image end of the optical imaging system. Furthermore, the following condition can also be satisfied: 0.20 < |f6 / f7| < 0.90. Additionally, the following condition can also be satisfied: 0.36 ≤ |f6 / f7| ≤ 0.83.

[0030] If the axial distance between the fourth and fifth lens elements is T45, and the axial distance between the sixth and seventh lens elements is T67, the following condition can be met: 0.00 < T67 / T45 < 0.80. Therefore, it is advantageous to reduce the size of the optical image acquisition system at its image end. Furthermore, the following conditions can also be met: 0.00 < T67 / T45 < 0.60. Additionally, the following conditions can also be met: 0.00 < T67 / T45 < 0.50. Furthermore, the following condition can also be met: 0.06 ≤ T67 / T45 ≤ 0.42.

[0031] If the sum of the central thicknesses of all lens elements of the optical imaging system is ΣCT and the sum of the axial distances between each of the adjacent lens elements of the optical imaging system is ΣAT, the following condition can be satisfied: 3.00 < ΣCT / ΣAT < 6.50. Therefore, this is advantageous for achieving a compact lens arrangement. Furthermore, the following condition can also be satisfied: 3.50 < ΣCT / ΣAT < 6.00.

[0032] If the focal length of the optical imaging system is f, the radius of curvature of the object-side surface of the fifth lens element is R9, and the radius of curvature of the image-side surface of the fifth lens element is R10, then the following condition can be satisfied: 4.00 < |f / R9| + |f / R10| < 8.00. Therefore, it is advantageous to control the refractive power of the fifth lens element and correct off-axis aberrations. Furthermore, the following condition can also be satisfied: 4.50 < |f / R9| + |f / R10| < 6.50.

[0033] If the radius of curvature of the image-side surface of the fifth lens element is R10 and the radius of curvature of the object-side surface of the sixth lens element is R11, the following condition can be met: -0.70 < R10 / R11 < 0.30. Therefore, it is advantageous to adjust the direction of light propagation and thereby increase the image height. Furthermore, the following condition can also be met: -0.55 < R10 / R11 < 0.25.

[0034] According to the present disclosure, the optical image acquisition system may further comprise an aperture diaphragm. If the axial distance between the aperture diaphragm and the image surface is SL and the focal length of the optical image acquisition system is f, the following condition can be satisfied: 1.40 < SL / f < 2.00. Therefore, it is advantageous to adjust the ratio of the distance between the aperture diaphragm and the image surface to the focal length of the optical image acquisition system and thereby adjust the position of the aperture diaphragm. Furthermore, the following condition can also be satisfied: 1.50 < SL / f < 1.90.

[0035] If the focal length of the fifth lens element is f5 and the focal length of the sixth lens element is f6, the following condition can be met: 0.70 < |f5 / f6| < 1.80. Therefore, it is advantageous to balance the refractive powers of the fifth and sixth lens elements to achieve a suitable balance between light focusing and light scattering capabilities, thus improving the light focusing quality in all fields of view. Furthermore, the following condition can also be met: 0.80 < |f5 / f6| < 1.60.

[0036] If the axial distance between the image-side surface of the first lens element and the image surface is TL, and the focal length of the optical imaging system is f, the following condition can be satisfied: 1.60 < TL / f < 2.10. Therefore, it is advantageous to reduce the overall path length and increase the field of view of the optical imaging system. Furthermore, the following condition can also be satisfied: 1.65 < TL / f < 2.05.

[0037] If half of the maximum field of view (HFOV) of the optical imaging system is the maximum field of view (0.70 < tan(HFOV) < 1.40), the following condition can be met: 0.70 < tan(HFOV) < 1.40. Therefore, it is advantageous to have a suitable field of view for the optical imaging system to meet market requirements. Furthermore, the following condition can also be met: 0.80 < tan(HFOV) < 1.30.

[0038] If the focal length of the fourth lens element is f4 and the focal length of the seventh lens element is f7, the following condition can be met: 0.40 < |f4 / f7| < 1.40. Therefore, this is advantageous for balancing the refractive power arrangement of the optical image acquisition system and thereby reducing aberrations. Furthermore, the following condition can also be met: 0.45 < |f4 / f7| < 1.20.

[0039] If 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 met: -0.50 < (R3-R4) / (R3+R4). Therefore, this is advantageous for matching the lens shape and refractive power of the second lens element. Furthermore, the following condition can also be met: -0.40 < (R3-R4) / (R3+R4) < 10.00. Additionally, the following condition can also be met: -0.20 < (R3-R4) / (R3+R4) < 8.00.

[0040] If the central thickness of the second lens element is CT2 and the central thickness of the sixth lens element is CT6, the following condition can be met: 0.30 < CT6 / CT2 < 1.25. Therefore, it is advantageous to balance the lens thickness at the object end and the image end of the optical imaging system, thereby increasing space utilization. Furthermore, the following condition can also be met: 0.40 < CT6 / CT2 < 1.15.

[0041] If the Abbe number of the fourth lens element is V4, the following condition can be met: 35.0 < V4 < 75.0. Therefore, this is advantageous for balancing the focusing capability of the optical imaging system for light of different wavelengths and thereby correcting chromatic aberration. Furthermore, the following condition can also be met: 40.0 < V4 < 60.0.

[0042] If 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 optical image acquisition system (which can be half the diagonal length of an effective light-sensitive area of ​​the image sensor) is ImgH, the following condition can be satisfied: 1.50 < TL / ImgH < 2.10. Therefore, it is advantageous to achieve a reasonable balance between reducing the overall path length of the optical image acquisition system and increasing the image surface area. Furthermore, the following condition can also be satisfied: 1.60 < TL / ImgH < 2.00.

[0043] If the focal length of the optical lens system for imaging is f, the focal length of the first lens element is f1, and the focal length of the second lens element is f2, the following condition can be met: 0.50 < f / f1 + f / f2 < 3.00. Therefore, this is advantageous to provide sufficient light focusing capability for the optical imaging system. Furthermore, the following condition can also be met: 0.70 < f / f1 + f / f2 < 2.00.

[0044] If the radius of curvature of the image-side surface of the third lens element is R6 and the radius of curvature of the object-side surface of the fourth lens element is R7, the following condition can be met: -0.40 < R6 / R7 < 0.55. Therefore, this is advantageous for controlling the deflection angle of the light in the optical imaging system. Furthermore, the following condition can also be met: -0.30 < R6 / R7 < 0.40.

[0045] If the axial distance between the third and fourth lens elements is T34, and the axial distance between the fourth and fifth lens elements is T45, the following condition can be met: 0.50 < T34 / T45 < 1.80. Therefore, this is advantageous for simplifying the assembly of the optical image acquisition system. Furthermore, the following condition can also be met: 0.60 < T34 / T45 < 1.60.

[0046] If the maximum effective radius of the object-side surface of the second lens element is Y2R1 and the maximum effective radius of the image-side surface of the seventh lens element is Y7R2, the following condition can be satisfied: 2.20 < Y7R2 / Y2R1 < 5.00. Therefore, it is advantageous to balance the ratio of the effective radius height of the image-side surface of the seventh lens element to the object-side surface of the second lens element, thereby increasing the field of view. Furthermore, the following condition can also be satisfied: 2.70 < Y7R2 / Y2R1 < 4.00. See [reference]. Fig. 35, which shows a schematic view of Y2R1 and Y7R2 according to the 1st embodiment of the present disclosure.

[0047] According to the present disclosure, the above-mentioned features and conditions can be used in numerous combinations to achieve corresponding effects.

[0048] According to the present disclosure, the lens elements of the optical imaging system can be made of either glass or plastic. If the lens elements are made of glass, the refractive power distribution of the optical imaging system can be more flexible, and the influence on imaging caused by changes in ambient temperature can be reduced. The glass lens element can be manufactured either by grinding or forming. If the lens elements are made of plastic, the manufacturing costs can be effectively reduced. Furthermore, the surfaces of each lens element can 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, thereby effectively shortening the overall path length of the optical imaging system. Additionally, the aspherical surfaces can be formed by plastic injection molding or glass forming.

[0049] According to the present disclosure, if a lens surface is aspherical, it means that it has an aspherical shape over its entire optically effective area or part(s) thereof.

[0050] According to the present disclosure, the material of one or more lens elements can optionally contain an additive that produces light absorption and interference effects and modifies the transmittance of the lens elements in a specific wavelength range to reduce unwanted scattered light or color deviations. For example, the additive can 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 can be homogeneously mixed with a plastic material to be used to manufacture a lens element from the mixed material by injection molding. Furthermore, the additive can be applied to the lens surface to achieve the aforementioned effects.

[0051] According to the present disclosure, both an object-side surface and an image-side surface have a paraxial region and an off-axis region. The paraxial region refers to the region of the surface in which light rays travel close to the optical axis, and the off-axis region refers to the region of the surface that is farther from the paraxial region. In particular, unless otherwise specified, if the lens element has a convex surface, the surface in the paraxial region thereof is convex, and if the lens element has a concave surface, the surface in the paraxial region thereof is concave.Furthermore, if a section of the refractive power, radius of curvature, or focal point of a lens element is not defined, it means that the section of the refractive power, radius of curvature, or focal point of the lens element lies in the paraxial region thereof.

[0052] 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 a non-axial point on the lens surface where its tangent is perpendicular to the optical axis.

[0053] According to the present disclosure, the image surface of the optical image acquisition system, based on the corresponding image sensor, can be flat or curved, in particular a curved surface that is concave and faces the objective side of the optical image acquisition system.

[0054] According to the present disclosure, an image correction unit, such as an image field flattener, can optionally be arranged between the lens element located closest to the image side of the optical image acquisition system along the beam path and the image surface to correct aberrations such as image field curvature. The optical properties of the image correction unit, such as curvature, thickness, refractive index, position, and surface shape (convex or concave surface of spherical, aspherical, diffractive, or Fresnel type), can be adapted according to the design of the image acquisition unit. In general, a preferred image correction unit is, for example, a thin transparent element with a concave object-side surface and a flat image-side surface, wherein the thin transparent element is arranged near the image surface.

[0055] According to the present disclosure, at least one light deflection element, such as a prism or a mirror, whose surface may be planar, spherical, aspherical, or free-form, can optionally be arranged between an imaged object and the image surface on the imaging beam path, so that the optical image acquisition system can be more flexible in its spatial arrangement and therefore the dimensions of an electronic device are not limited by the total path length of the optical image acquisition system. See in particular Fig. 36 and Fig. 37. Fig. Figure 36 shows a schematic view of a configuration of a light deflection element in an optical image acquisition system according to an embodiment of the present disclosure, and Fig.Figure 37 shows a schematic view of another configuration of a light deflection element in an optical imaging system according to an embodiment of the present disclosure. Fig. 36 and Fig. 37. The optical image acquisition system can have, in sequence 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 deflection element LF, and a second optical axis OA2. The light deflection element LF can be arranged between the imaged object and a lens group LG of the optical image acquisition system, as shown in Fig. 36 shown, or arranged between a lens group LG of the optical image acquisition system and the image surface IMG, as shown in Fig. 37 shown. See also Fig.38, which shows a schematic view of a configuration of two light deflection elements in an optical imaging system according to an embodiment of the present disclosure. Fig.38 The optical image acquisition system can have, in sequence from an imaged object (not shown in the figure) to an image surface IMG along a beam path, a first optical axis OA1, a first light deflection element LF1, a second optical axis OA2, a second light deflection element LF2, and a third optical axis OA3. The first light deflection element LF1 is arranged between the imaged object and a lens group LG of the optical image acquisition system, the second light deflection element LF2 is arranged between the lens group LG of the optical image acquisition system and the image surface IMG, and the direction of propagation of the light on the first optical axis OA1 can be the same direction as the direction of propagation of the light on the third optical axis OA3, as shown in Fig.Figure 38 shows that the optical image acquisition system can optionally be provided with three or more light deflection elements, and the present disclosure is not limited to the type, number and position of the light deflection elements of the embodiments disclosed in the aforementioned figures.

[0056] According to the present disclosure, the optical image acquisition system can comprise at least one aperture, for example an aperture diaphragm, a glare diaphragm, or a field diaphragm. The glare diaphragm or field diaphragm is adjusted to eliminate stray light and thereby improve the image quality.

[0057] According to the present disclosure, an aperture diaphragm can be configured as a front diaphragm or a central diaphragm. A front diaphragm positioned between an imaged object and the first lens element can provide a greater distance between the exit pupil of the optical image acquisition system and the image surface to create a telecentric effect, thereby improving the image sensor efficiency of an image sensor (e.g., CCD or CMOS). A central diaphragm positioned between the first lens element and the image surface is advantageous for increasing the viewing angle of the optical image acquisition system and thereby providing a wider field of view for it.

[0058] According to the present disclosure, the optical image acquisition system can include an aperture control unit. The aperture control unit can be a mechanical component or a light modulator that can control the size and shape of the aperture by means of electricity or electrical signals. The mechanical component can include a movable element, such as an aperture assembly or a light-shielding film. The light modulator can 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 improve the ability to adjust image quality. Furthermore, the aperture control unit can be the aperture diaphragm of the present disclosure, which changes the f-number to achieve various image effects, such as depth of field or lens speed.

[0059] According to the present disclosure, the optical imaging system can comprise one or more optical elements for limiting the shape of the light passing through the optical imaging system. Each optical element can be, but is not limited to, a filter, a polarizer, etc., and each optical element can be, but is not limited to, a single element, a composite component, a thin film, etc. The optical element can be arranged on the object side or the image side of the optical imaging system, or between two adjacent lens elements, to transmit light in a specific shape and thus meet the application requirements.

[0060] According to the present disclosure, the optical image acquisition system can comprise at least one optical lens system, one optical element, or one support, which has at least one surface with a low-reflection layer. The low-reflection layer can effectively reduce stray light resulting from light reflection at the interface. The low-reflection layer can be located in an optically ineffective region of an object-side surface, 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 can be a light-blocking element, an annular spacer, a tube element, a cover glass, a blue glass, a filter, a color filter, a beam deflection element, a prism, a mirror, etc.The support can be a base for holding a lens assembly, a microlens arranged on an image sensor, a substrate surrounding the image sensor, a glass plate to protect the image sensor, etc.

[0061] According to the present disclosure, the optical imaging system can further comprise a light-blocking element. The light-blocking element can have a non-circular aperture, and the non-circular aperture can have different effective radii in different directions perpendicular to the optical axis. Therefore, it is advantageous to coordinate it with the shape of non-circular lens elements or aperture diaphragms in order to save space and to fully utilize the light passing through the non-circular lens elements or aperture diaphragms, thereby reducing stray light. In addition, the light-blocking element can be provided with a wavy or serrated structure at the edge of an inner aperture section thereof.

[0062] 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 are calculated along the optical axis. Furthermore, if the optical axis is deflected by a light deflection element, the axial optical data are also calculated along the deflected optical axis.

[0063] In accordance with the above description of the present disclosure, the following specific embodiments are provided for further explanation. 1. Design

[0064] Fig. Figure 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.The image acquisition unit comprises the optical image acquisition system (whose reference numeral is omitted) of the present disclosure and an image sensor IS. The optical image acquisition system comprises, in order from an object side to an image side along an optical axis, a first lens element E1, an aperture diaphragm ST, a second lens element E2, a third lens element E3, an aperture S1, 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 optical image acquisition system comprises seven lens elements (E1, E2, E3, E4, E5, E6, and E7), with no additional lens element arranged between any of the adjacent seven lens elements.

[0065] The first lens element E1, with positive refractive power, has an object-side surface that is concave in a paraxial region and an image-side surface that is convex in a paraxial region. The first lens element E1 is made of glass and both its object-side and image-side surfaces are aspherical. The object-side surface of the first lens element E1 has an inflection point. The image-side surface of the first lens element E1 has an inflection point.

[0066] The second lens element E2, with positive refractive power, has an object-side surface that is concave in a paraxial region and an image-side surface that is convex in a paraxial region. The second lens element E2 is made of plastic material and both its object-side and image-side surfaces are aspherical. The object-side surface of the second lens element E2 has two inflection points.

[0067] The third lens element E3, 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. The third lens element E3 is made of plastic material and both its object-side and image-side surfaces are aspherical. The object-side surface of the third lens element E3 has an inflection point. The image-side surface of the third lens element E3 has an inflection point. The object-side surface of the third lens element E3 has a critical point in an off-axis region.

[0068] The fourth lens element E4, with positive refractive power, has an object-side surface that is concave in a paraxial region and an image-side surface that is convex in a paraxial region. The fourth lens element E4 is made of plastic material and both its object-side and image-side surfaces are aspherical.

[0069] The fifth lens element E5, with negative refractive power, has an object-side surface that is concave in a paraxial region and an image-side surface that is convex in a paraxial region. The fifth lens element E5 is made of plastic material and has both aspheric object-side and image-side surfaces. The object-side surface of the fifth lens element E5 has an inflection point. The image-side surface of the fifth lens element E5 has an inflection point. The object-side surface of the fifth lens element E5 has a critical point in an off-axis region. The image-side surface of the fifth lens element E5 has a critical point in an off-axis region.

[0070] The sixth lens element E6, with positive refractive power, has an object-side surface that is convex in a paraxial region and an image-side surface that is also convex in a paraxial region. The sixth lens element E6 is made of plastic material and both its object-side and image-side surfaces are aspherical. The object-side surface of the sixth lens element E6 has two inflection points. 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 one critical point in an off-axis region. The image-side surface of the sixth lens element E6 has two critical points in an off-axis region.

[0071] 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. The seventh lens element E7 is made of plastic material and both its object-side and image-side surfaces are aspherical. The object-side surface of the seventh lens element E7 has four 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 one critical point in an off-axis region. The image-side surface of the seventh lens element E7 has one critical point in an off-axis region.

[0072] 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 optical image acquisition system. The IS image sensor is located on or near the image surface IMG of the optical image acquisition system.

[0073] The equation for the aspherical surface profiles of the above-mentioned lens elements of the first embodiment is as follows: X(Y)=(Y2 / R) / (1+sqrt(1−(1+k)×(Y / R)2))+∑i(Ai)×(Yi) , where X is the displacement parallel to the optical axis from 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 conic coefficient; and Ai is the i-th aspherical coefficient, where in the embodiments i can be 4, 6, 8, 10, 12, 14 and 16, but is not limited to these.

[0074] In the optical image acquisition system of the image acquisition unit 1 according to the 1st embodiment, where the focal length of the optical image acquisition system is f, the f-number of the optical image acquisition system is Fno, half of the maximum field of view of the optical image acquisition system is HFOV, and the maximum field of view of the optical image acquisition system is FOV, these parameters have the following values: f = 6.98 millimeters (mm), Fno = 1.80, HFOV = 45.0 degrees, and FOV = 90.0 degrees.

[0075] If the axial distance between the object-side surface of the first lens element E1 and the image surface IMG TL is and the maximum image height of the optical image acquisition system is ImgH, then the following condition is met: TL / ImgH = 1.82.

[0076] If the axial distance between the object-side surface of the first lens element E1 and the image surface IMG TL is, and the focal length of the optical image acquisition system is f, then the following condition is met: TL / f = 1.84.

[0077] If the axial distance between the aperture diaphragm ST and the image surface IMG SL is, and the focal length of the optical image acquisition system is f, then the following condition is met: SL / f = 1.65.

[0078] If 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 object-side surface of the first lens element E1 is R1, then the following condition is met: TL / R1 = -0.69.

[0079] If 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 object-side surface of the second lens element E2 is R3, then the following condition is met: TL / R3 = -0.58.

[0080] If half of the maximum field of view of the optical image acquisition system is HFOV, then the following condition is met: tan(HFOV) = 1.00.

[0081] If the focal length of the optical image acquisition system is f, a focal length of the first lens element E1 is f1 and a focal length of the second lens element E2 is f2, then the following condition is met: f / f1+f / f2 ​​= 1.27.

[0082] If the focal length of the fourth lens element E4 is f4 and the focal length of the seventh lens element E7 is f7, then the following condition is met: |f4 / f7| = 0.87.

[0083] If the focal length of the fifth lens element E5 is f5 and the focal length of the sixth lens element E6 is f6, then the following condition is satisfied: |f5 / f6| = 1.21.

[0084] If the focal length of the sixth lens element E6 is f6 and the focal length of the seventh lens element E7 is f7, then the following condition is satisfied: |f6 / f7| = 0.64.

[0085] If the focal length of the optical image acquisition system is f, a radius of curvature of the object-side surface of the fifth lens element E5 R9 is and a radius of curvature of the image-side surface of the fifth lens element E5 R10 is, the following condition is satisfied: |f / R9|+|f / R10| = 5.76.

[0086] If the radius of curvature of the image-side surface of the third lens element E3 is R6 and the radius of curvature of the object-side surface of the fourth lens element E4 is R7, then the following condition is met: R6 / R7 = -0.25.

[0087] If the radius of curvature of the image-side surface of the fifth lens element E5 is R10 and the radius of curvature of the object-side surface of the sixth lens element E6 is R11, then the following condition is met: R10 / R11 = -0.39.

[0088] If 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, then the following condition is met: (R3-R4) / (R3+R4) = 0.63.

[0089] If the sum of the central thicknesses of all lens elements of the optical imaging system is ΣCT and the sum of the axial distances between each of all adjacent lens elements of the optical imaging system is ΣAT, then the following condition is satisfied: ΣCT / ΣAT = 4.50. 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, ΣCT is a sum of the central thicknesses of the first lens element E1, the second lens element E2, the third lens element E3, the fourth lens element E4, the fifth lens element E5, the sixth lens element E6, and the seventh lens element E7.In this embodiment, ΣAT is a sum of the axial distances between the first lens element E1 and the second lens element E2, the second lens element E2 and the third lens element E3, the third lens element E3 and the fourth lens element E4, the fourth lens element E4 and the fifth lens element E5, the fifth lens element E5 and the sixth lens element E6, and the sixth lens element E6 and the seventh lens element E7.

[0090] If the central thickness of the second lens element E2 is CT2 and the central thickness of the sixth lens element E6 is CT6, then the following condition is met: CT6 / CT2 = 0.65.

[0091] If the axial distance between the first lens element E1 and the second lens element E2 is T12, the axial distance between the second lens element E2 and the third lens element E3 is T23, the axial distance between the third lens element E3 and the fourth lens element E4 is T34, the axial distance between the fourth lens element E4 and the fifth lens element E5 is T45, the axial distance between the fifth lens element E5 and the sixth lens element E6 is T56, and the axial distance between the sixth lens element E6 and the seventh lens element E7 is T67, then the following condition is satisfied: (T12+T23+T56+T67) / (T34+T45) = 0.20.

[0092] If the axial distance between the third lens element E3 and the fourth lens element E4 is T34 and the axial distance between the fourth lens element E4 and the fifth lens element E5 is T45, then the following condition is met: T34 / T45 = 1.13.

[0093] If the axial distance between the fourth lens element E4 and the fifth lens element E5 is T45 and the axial distance between the sixth lens element E6 and the seventh lens element E7 is T67, then the following condition is met: T67 / T45 = 0.07.

[0094] If the Abbe number of the fourth lens element E4 is V4, then the following condition is met: V4 = 56.0.

[0095] If the maximum effective radius of the object-side surface of the second lens element is E2 Y2R1 and the maximum effective radius of the image-side surface of the seventh lens element is E7 Y7R2, then the following condition is met: Y7R2 / Y2R1 = 3.01.

[0096] The detailed optical data of the first embodiment are listed in Table 1A and the aspherical surface data in Table 1B below. TABLE 1A 1. Design f = 6.98 mm, Fno = 1.80, HFOV = 45.0 degrees Surface # radius of curvature thickness material index Abbe # Focal length 0 object infinity infinity 1 Lens 1 -18,6639 (ASP) 1,542 Glass 1,762 40,1 10,38 2 -5,7543 (ASP) -0,175 3 Ape.-Blender Plano 0,347 4 Lens 2 -22,0743 (ASP) 1,780 plastic 1,544 56,0 11,58 5 -5,0417 (ASP) 0,050 6 Lens 3 15,3280 (ASP) 0,600 plastic 1,615 25,3 -10,22 7 4,3922 (ASP) 0,495 8 Aperture Plano 0,341 9 Lens 4 -17,8571 (ASP) 1,662 plastic 1,544 56,0 9,72 10 -4,2143 (ASP) 0,741 11 Lens 5 -1,8895 (ASP) 0,750 plastic 1,615 25,3 -8,66 12 -3,3701 (ASP) 0,050 13 Lens 6 8,6462 (ASP) 1,156 plastic 1,544 56,0 7,17 14 -6,7706 (ASP) 0,050 15 Lens 7 2,9298 (ASP) 1,048 plastic 1,545 56,1 -11,15 16 1,7271 (ASP) 1,500 17 filter Plano 0,210 Glass 1,517 64,2 - 18 Plano 0,713 19 Picture Plano - Note: Reference wavelength is 587.6 nm (d-line). An effective radius of aperture S1 (surface 8) is 2.448 mm. TABLE 1B Aspheric coefficients Surface # 1 2 4 5 k = 0,00000E+00 0,00000E+00 -8,08092E+01 -1,47538E+00 A4 = -2,35348E-03 8,64684E-03 9,27201E-03 -6,24487E-03 A6 = 2,19839E-04 -1,11083E-03 -2,24544E-03 3,60031E-06 A8 = 4,91882E-06 1,39837E-04 2,65165E-04 -1,51478E-05 A10 = - - -2,76402E-05 -5,52241E-06 Surface # 6 7 9 10 k = 1,04274E+01 -3,48348E+00 3,45814E+01 -1,89402E+00 A4 = -1,04798E-02 -2,42370E-03 -1,14598E-03 -7,87072E-03 A6 = -2,61822E-05 -3,08919E-04 3,49394E-04 2,63366E-04 A8 = 1,48436E-05 5,93274E-05 -9,27510E-05 1,58515E-04 A10 = -8,22009E-07 -4,98234E-06 5,98816E-06 -2,51421E-05 A12 = - - - 1,08923E-06 Surface # 11 12 13 14 k = -7,48200E-01 -6,67726E-01 1,12056E+00 -2,04531 E+01 A4 = 1,76022E-02 -2,17376E-03 7,54778E-03 2,86283E-02 A6 = -6,27572E-05 1,32410E-03 -1,08865E-03 -3,55115E-03 A8 = 1,51905E-04 -1,25015E-04 3,05360E-05 2,09134E-04 A10 = -1,69551E-05 9,21194E-06 -3,28744E-09 -6,13111E-06 A12 = 6,49297E-07 -2,69873E-07 -5,63281E-09 6,93931E-08 Surface # 15 16 k = -3,49241E+00 -3,15651E+00 A4 = -9,13623E-03 -6,84446E-03 A6 = 2,60844E-04 3,79258E-04 A8 = 1,53411E-05 -1,17910E-05 A10 = -2,75069E-07 2,00166E-07 A12 = -4,90665E-08 -1,87801E-09 A14 = 1,88856E-09 1,37464E-11 A16 = -1,89138E-11 -1,39470E-13

[0097] Table 1A lists the radius of curvature, thickness, and focal length in millimeters (mm). Surface numbers 0–19 represent the surfaces arranged sequentially 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–A16 represent the 4th to 16th order aspherical coefficients. The tables shown below for each embodiment are the corresponding schematic parameter and aberration curves, and the table definitions are the same as in Table 1A and Table 1B of the first embodiment. Therefore, no further explanation is given in this regard. 2. Design

[0098] Fig. Figure 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 comprises the optical image acquisition system (whose reference numeral is omitted) of the present disclosure and an image sensor IS. The optical image acquisition system comprises, in order from an object side to an image side along an optical axis, a first lens element E1, an aperture diaphragm ST, a second lens element E2, a third lens element E3, an aperture S1, 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 optical image acquisition system comprises seven lens elements (E1, E2, E3, E4, E5, E6, and E7), with no additional lens element arranged between any of the adjacent seven lens elements.

[0099] The first lens element E1, with positive refractive power, has an object-side surface that is concave in a paraxial region and an image-side surface that is convex in a paraxial region. The first lens element E1 is made of glass and both its object-side and image-side surfaces are aspherical. The object-side surface of the first lens element E1 has an inflection point. The image-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.

[0100] The second lens element E2, with positive refractive power, has an object-side surface that is concave in a paraxial region and an image-side surface that is convex in a paraxial region. The second lens element E2 is made of plastic material and both its object-side and image-side surfaces are aspherical. The object-side surface of the second lens element E2 has two inflection points.

[0101] The third lens element E3, with negative refractive power, has an object-side surface that is concave in a paraxial region, and an image-side surface that is also concave in a paraxial region. The third lens element E3 is made of plastic material and both its object-side and image-side surfaces are aspherical. The image-side surface of the third lens element E3 has an inflection point.

[0102] The fourth lens element E4, with positive refractive power, has an object-side surface that is concave in a paraxial region and an image-side surface that is convex in a paraxial region. The fourth lens element E4 is made of plastic material and both its object-side and image-side surfaces are aspherical. The object-side surface of the fourth lens element E4 has an inflection point.

[0103] The fifth lens element E5, with negative refractive power, has an object-side surface that is concave in a paraxial region and an image-side surface that is convex in a paraxial region. The fifth lens element E5 is made of plastic material and has both aspheric object-side and image-side surfaces. The object-side surface of the fifth lens element E5 has an inflection point. The image-side surface of the fifth lens element E5 has an inflection point. The image-side surface of the fifth lens element E5 has a critical point in an off-axis region.

[0104] The sixth lens element E6, with positive refractive power, has an object-side surface that is convex in a paraxial region and an image-side surface that is also convex in a paraxial region. The sixth lens element E6 is made of plastic material and both its object-side and image-side surfaces are 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 two inflection points. The object-side surface of the sixth lens element E6 has one critical point in an off-axis region. The image-side surface of the sixth lens element E6 has two critical points in an off-axis region.

[0105] 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. The seventh lens element E7 is made of plastic material and both its object-side and image-side surfaces are 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 one critical point in an off-axis region. The image-side surface of the seventh lens element E7 has one critical point in an off-axis region.

[0106] The E8 filter is made of glass and is positioned between the seventh lens element E7 and the image surface IMG. It does not affect the focal length of the optical image acquisition system. The IS image sensor is located on or near the image surface IMG of the optical image acquisition system.

[0107] The detailed optical data of the 2nd embodiment are listed in Table 2A and the aspherical surface data are listed in Table 2B below. TABLE 2A 2. Design f = 6.94 mm, Fno = 1.80, HFOV = 45.2 degrees Surface # radius of curvature thickness material index Abbe # Focal length 0 object infinity infinity 1 Lens 1 -91,6430 (ASP) 1,022 Glass 1,834 37,2 9,17 2 -7,0936 (ASP) -0,149 3 Ape.-Blender Plano 0,216 4 Lens 2 -14,6671 (ASP) 2,077 plastic 1,534 56,0 9,34 5 -3,9071 (ASP) 0,050 6 Lens 3 -11,6279 (ASP) 0,609 plastic 1,614 26 -7,16 7 7,2028 (ASP) 0,315 8 Aperture Plano 0,266 9 Lens 4 -30,2846 (ASP) 1,656 plastic 1,545 56,1 9,01 10 -4,3051 (ASP) 0,709 11 Lens 5 -1,8876 (ASP) 0,700 plastic 1,584 28,2 -9,52 12 -3,2481 (ASP) 0,050 13 Lens 6 7,9233 (ASP) 1,211 plastic 1,545 56,1 7,54 14 -8,0680 (ASP) 0,130 15 Lens 7 2,7901 (ASP) 1,000 plastic 1,562 44,6 -10,94 16 1,6716 (ASP) 1,500 17 filter Plano 0,210 Glass 1,517 64,2 - 18 Plano 0,739 19 Picture Plano - Note: Reference wavelength is 587.6 nm (d-line). An effective radius of aperture S1 (surface 8) is 2.476 mm. TABLE 2B Aspheric coefficients Surface # 1 2 4 5 k = 0,00000E+00 0,00000E+00 -3,44922E+01 -1,89055E+00 A4 = -2,72333E-03 7,07019E-03 8,92654E-03 -2,04528E-03 A6 = 2,65444E-04 -8,15133E-04 -2,03705E-03 -1,24672E-03 A8 = 1,75924E-05 1,16801 E-04 2,82719E-04 1,05194E-04 A10 = - - -4,57945E-05 -1,13847E-05 Surface # 6 7 9 10 k = -7,03116E+01 -2,91345E+00 5,58118E+01 -2,63042E+00 A4 = -8,87246E-03 -2,98751E-03 -2,24062E-04 -7,01723E-03 A6 = 5,54394E-04 1,69804E-04 -1,46566E-04 1,56661 E-04 A8 = -1,88864E-04 -5,38048E-05 -5,70476E-05 1,34900E-04 A10 = 1,44371E-05 3,65237E-06 7,36622E-06 -1,75817E-05 A12 = - - - 6,27459E-07 Surface # 11 12 13 14 k = -7,47923E-01 -6,71492E-01 -3,97653E-01 -1,96941E+01 A4 = 1,79792E-02 -3,76303E-03 7,09384E-03 3,14393E-02 A6 = -2,42687E-04 1,83794E-03 -8,41218E-04 -3,89114E-03 A8 = 1,94318E-04 -2,05294E-04 -4,80596E-06 2,26322E-04 A10 = -2,11259E-05 1,50690E-05 1,89395E-06 -6,46624E-06 A12 = 7,78299E-07 -4,25672E-07 -4,57087E-08 7,04351E-08 Surface # 15 16 k = -4,13886E+00 -2,97756E+00 A4 = -5,65085E-03 -7,15642E-03 A6 = -3,50358E-04 3,68211E-04 A8 = 6,84311E-05 -9,58280E-06 A10 = -2,73829E-06 7,19507E-08 A12 = 1,29113E-08 2,60837E-09 A14 = 1,15504E-09 -7,02736E-11 A16 = -1,66147E-11 4,81309E-13

[0108] In the second 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 the parameters listed in Table 2C are also the same as in the first embodiment, with corresponding values ​​for the second embodiment, so further explanation is unnecessary.

[0109] Furthermore, these parameters from Table 2A and Table 2B can be calculated as the following values ​​and satisfy the following conditions: TABLE 2C Schematic parameters f [mm] 6,94 |f6 / f7] 0,69 Fno 1,80 |f / R9|+|f / R10| 5,82 HFOV [Grade] 45,2 R6 / R7 -0,24 FOV [degrees] 90,4 R10 / R11 -0,41 TL / ImgH 1,75 (R3-R4) / (R3+R4) 0,58 TL / f 1,77 ΣCT / ΣAT 5,21 SL / f 1,65 CT6 / CT2 0,58 TL / R1 -0,13 (T12+T23+T56+T67) / (T34+T45) 0,23 TL / R3 -0,84 T34 / T45 0,82 tan(HFOV) 1,01 T67 / T45 0,18 f / f1 +f / f2 1,50 V4 56,1 |f4 / f7| 0,82 Y7R2 / Y2R1 3,24 |f5 / f6| 1,26 - - 3. Design

[0110] Fig. Figure 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 comprises the image acquisition unit 3, the optical image acquisition system (whose reference numeral is omitted) of the present disclosure, and an image sensor IS. The optical image acquisition system comprises, in order from an object side to an image side along an optical axis, a first lens element E1, an aperture diaphragm ST, a second lens element E2, a third lens element E3, an aperture S1, 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 optical image acquisition system comprises seven lens elements (E1, E2, E3, E4, E5, E6, and E7), with no additional lens element arranged between any of the adjacent seven lens elements.

[0111] The first lens element E1, with positive refractive power, has an object-side surface that is concave in a paraxial region and an image-side surface that is convex in a paraxial region. The first lens element E1 is made of glass and both its object-side and image-side surfaces are aspherical. The object-side surface of the first lens element E1 has an inflection point. The image-side surface of the first lens element E1 has an inflection point.

[0112] The second lens element E2, with positive refractive power, has an object-side surface that is convex in a paraxial region and an image-side surface that is also convex in a paraxial region. The second lens element E2 is made of plastic material and both its object-side and image-side surfaces are aspherical. The object-side surface of the second lens element E2 has an inflection point.

[0113] The third lens element E3, 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. The third lens element E3 is made of plastic material and both its object-side and image-side surfaces are aspherical. The object-side surface of the third lens element E3 has an inflection point. The image-side surface of the third lens element E3 has an inflection point. The object-side surface of the third lens element E3 has a critical point in an off-axis region.

[0114] The fourth lens element E4, with positive refractive power, has an object-side surface that is convex in a paraxial region and an image-side surface that is also convex in a paraxial region. The fourth lens element E4 is made of plastic material and both its object-side and image-side surfaces are aspherical. The object-side surface of the fourth lens element E4 has two inflection points. The image-side surface of the fourth lens element E4 has one inflection point.

[0115] The fifth lens element E5, with negative refractive power, has an object-side surface that is concave in a paraxial region and an image-side surface that is convex in a paraxial region. The fifth lens element E5 is made of plastic material and both its object-side and image-side surfaces are aspherical. The object-side surface of the fifth lens element E5 has two inflection points. The image-side surface of the fifth lens element E5 has one inflection point. The image-side surface of the fifth lens element E5 has a critical point in an off-axis region.

[0116] The sixth lens element E6, with positive refractive power, has an object-side surface that is convex in a paraxial region and an image-side surface that is also convex in a paraxial region. The sixth lens element E6 is made of plastic material and both its object-side and image-side surfaces are aspherical. The object-side surface of the sixth lens element E6 has two inflection points. 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 one critical point in an off-axis region. The image-side surface of the sixth lens element E6 has two critical points in an off-axis region.

[0117] 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. The seventh lens element E7 is made of plastic material and both its object-side and image-side surfaces are aspherical. The object-side surface of the seventh lens element E7 has four 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 three critical points in an off-axis region. The image-side surface of the seventh lens element E7 has one critical point in an off-axis region.

[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 optical image acquisition system. The IS image sensor is located on or near the image surface IMG of the optical image acquisition system.

[0119] The detailed optical data of the 3rd embodiment are listed in Table 3A and the aspherical surface data in Table 3B below. TABLE 3A 3. Design f = 6.86 mm, Fno = 1.80, HFOV = 45.4 degrees Surface # radius of curvature thickness material index Abbe # Focal length 0 object infinity infinity 1 Lens 1 -8,5705 (ASP) 1,573 Glass 1,816 46,6 214,58 2 -8,8444 (ASP) 0,085 3 Ape.-Blender Plano 0,096 4 Lens 2 9,8039 (ASP) 1,850 plastic 1,544 56,0 7,71 5 -6,8473 (ASP) 0,231 6 Lens 3 8,7363 (ASP) 0,600 plastic 1,587 28,3 -12,8 7 3,9372 (ASP) 0,680 8 Aperture Plano 0,090 9 Lens 4 21,4936 (ASP) 1,837 plastic 1,544 56,0 9,78 10 -6,8628 (ASP) 0,851 11 Lens 5 -1,8842 (ASP) 0,750 plastic 1,639 23,5 -8,04 12 -3,4376 (ASP) 0,050 13 Lens 6 7,8827 (ASP) 1,244 plastic 1,544 56,0 6,30 14 -5,7190 (ASP) 0,050 15 Lens 7 3,0485 (ASP) 1,036 plastic 1,562 44,6 -10,87 16 1,7850 (ASP) 1,500 17 filter Plano 0,210 Glass 1,517 64,2 - 18 Plano 0,687 19 Picture Plano - Note: Reference wavelength is 587.6 nm (d-line). An effective radius of aperture S1 (surface 8) is 2.818 mm. TABLE 3B Aspheric coefficients Surface # 1 2 4 5 k = 0,00000E+00 0,00000E+00 -5,19657E+01 -5,21483E+00 A4 = 7,15733E-04 2,98915E-03 6,72771E-03 -4,01320E-03 A6 = 1,23974E-04 -3,15490E-05 -1,74197E-03 -5,98120E-04 A8 = -3,52277E-06 2,09386E-05 2,41636E-04 8,95215E-05 A10 = - - -2,31480E-05 -1,00769E-05 Surface # 6 7 9 10 k = 7,74284E+00 -2,83698E+00 -3,55886E+00 -2,47964E+00 A4 = -7,97264E-03 -2,96057E-03 -1,68315E-03 -7,04143E-03 A6 = -3,81296E-04 1,52928E-04 4,97422E-04 4,17999E-04 A8 = 4,30058E-05 -1,50721E-05 -9,02264E-05 5,42924E-05 A10 = -5,90701E-06 -5,95595E-07 4,67979E-06 -1,02812E-05 A12 = - - - 4,85249E-07 Surface # 11 12 13 14 k = -7,48393E-01 -7,23506E-01 8,81768E-01 -9,94867E+00 A4 = 1,77511 E-02 -3,11557E-04 5,73825E-03 2,63767E-02 A6 = -1,85650E-04 7,14557E-04 -8,80255E-04 -3,15594E-03 A8 = 1,48728E-04 -2,64787E-06 2,92673E-05 1,83229E-04 A10 = -1,50291E-05 -4,72650E-07 -6,12534E-07 -5,34528E-06 A12 = 5,52544E-07 -1,78161E-08 1,15881E-08 6,05582E-08 Surface # 15 16 k = -3,89421E+00 -3,28697E+00 A4 = -9,28334E-03 -7,34309E-03 A6 = 1,58715E-04 3,98770E-04 A8 = 2,11601E-05 -8,61512E-06 A10 = 1,50699E-07 -1,39762E-07 A12 = -9,72546E-08 1,14612E-08 A14 = 3,49982E-09 -2,27205E-10 A16 = -3,73022E-11 1,56294E-12

[0120] 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 the parameters listed in Table 3C are also the same as those for the first embodiment, with the corresponding values ​​for the third embodiment, so no further explanation is given here.

[0121] Furthermore, these parameters from Table 3A and Table 3B can be calculated as the following values ​​and satisfy the following conditions: TABLE 3C Schematic parameters f [mm] 6,86 |f6 / f7] 0,58 Fno 1,80 |f / R9|+|f / R10| 5,64 HFOV [Grade] 45,4 R6 / R7 0,18 FOV [degrees] 90,9 R10 / R11 -0,44 TL / ImgH 1,90 (R3-R4) / (R3+R4) 5,63 TL / f 1,96 ΣCT / ΣAT 4,17 SL / f 1,71 CT6 / CT2 0,67 TL / R1 -1,57 (T12+T23+T56+T67) / (T34+T45) 0,32 TL / R3 1,37 T34 / T45 0,90 tan(HFOV) 1,02 T67 / T45 0,06 f / f1 +f / f2 0,92 V4 56,0 |f4 / f7| 0,90 Y7R2 / Y2R1 2,80 |f5 / f6| 1,28 - - 4. Design

[0122] Fig. Figure 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 4th embodiment. Fig.7 comprises the image acquisition unit 4, the optical image acquisition system (whose reference numeral is omitted) of the present disclosure, and an image sensor IS. The optical image acquisition system comprises, in order from an object side to an image side along an optical axis, a first lens element E1, an aperture diaphragm ST, a second lens element E2, a third lens element E3, an aperture S1, 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 optical image acquisition system comprises seven lens elements (E1, E2, E3, E4, E5, E6, and E7), with no additional lens element arranged between any of the adjacent seven lens elements.

[0123] The first lens element E1, with positive refractive power, has an object-side surface that is concave in a paraxial region and an image-side surface that is convex in a paraxial region. The first lens element E1 is made of glass and both its object-side and image-side surfaces are aspherical. The object-side surface of the first lens element E1 has an inflection point. The image-side surface of the first lens element E1 has an inflection point.

[0124] The second lens element E2, with positive refractive power, has an object-side surface that is concave in a paraxial region and an image-side surface that is convex in a paraxial region. The second lens element E2 is made of plastic material and both its object-side and image-side surfaces are aspherical. The object-side surface of the second lens element E2 has two inflection points.

[0125] The third lens element E3, 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. The third lens element E3 is made of plastic material and both its object-side and image-side surfaces are aspherical. The object-side surface of the third lens element E3 has an inflection point. The image-side surface of the third lens element E3 has an inflection point. The object-side surface of the third lens element E3 has a critical point in an off-axis region. The image-side surface of the third lens element E3 has a critical point in an off-axis region.

[0126] The fourth lens element E4, with positive refractive power, has an object-side surface that is concave in a paraxial region and an image-side surface that is convex in a paraxial region. The fourth lens element E4 is made of plastic material and both its object-side and image-side surfaces are aspherical. The object-side surface of the fourth lens element E4 has an inflection point. The image-side surface of the fourth lens element E4 has an inflection point.

[0127] The fifth lens element E5, with negative refractive power, has an object-side surface that is concave in a paraxial region and an image-side surface that is convex in a paraxial region. The fifth lens element E5 is made of plastic material and both its object-side and image-side surfaces are aspherical. The object-side surface of the fifth lens element E5 has two inflection points. The image-side surface of the fifth lens element E5 has one inflection point. The image-side surface of the fifth lens element E5 has a critical point in an off-axis region.

[0128] The sixth lens element E6, with positive refractive power, has an object-side surface that is convex in a paraxial region and an image-side surface that is also convex in a paraxial region. The sixth lens element E6 is made of plastic material and both its object-side and image-side surfaces are aspherical. The object-side surface of the sixth lens element E6 has two inflection points. 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 one critical point in an off-axis region. The image-side surface of the sixth lens element E6 has two critical points in an off-axis region.

[0129] 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. The seventh lens element E7 is made of plastic material and both its object-side and image-side surfaces are aspherical. The object-side surface of the seventh lens element E7 has four 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 one critical point in an off-axis region. The image-side surface of the seventh lens element E7 has one critical point in an off-axis region.

[0130] The E8 filter is made of glass and is positioned between the seventh lens element E7 and the image surface IMG. It does not affect the focal length of the optical image acquisition system. The IS image sensor is located on or near the image surface IMG of the optical image acquisition system.

[0131] The detailed optical data of the 4th embodiment are listed in Table 4A and the aspherical surface data in Table 4B below. TABLE 4A 4. Design f = 7.54 mm, Fno = 1.80, HFOV = 46.3 degrees Surface # radius of curvature thickness material index Abbe # Focal length 0 object infinity infinity 1 Lens 1 -36,8267 (ASP) 1,903 Glass 1,775 50,3 10,43 2 -6,7831 (ASP) -0,166 3 Ape.-Blender Plano 0,318 4 Lens 2 -19,5862 (ASP) 1,659 plastic 1,544 56,0 18,98 5 -6,9634 (ASP) 0,053 6 Lens 3 10,0737 (ASP) 0,640 plastic 1,639 23,5 -14,66 7 4,7329 (ASP) 0,640 8 Aperture Plano 0,290 9 Lens 4 -63,5066 (ASP) 1,795 plastic 1,544 56,0 10,59 10 -5,3367 (ASP) 0,627 11 Lens 5 -2,0257 (ASP) 0,757 plastic 1,615 25,3 -9,64 12 -3,5138 (ASP) 0,053 13 Lens 6 9,4178 (ASP) 1,107 plastic 1,544 56,0 9,98 14 -12,2921 (ASP) 0,261 15 Lens 7 3,3755 (ASP) 1,314 plastic 1,551 44,8 -17,1 16 2,1415 (ASP) 1,600 17 filter Plano 0,224 Glass 1,517 64,2 - 18 Plano 0,572 19 Picture Plano - Note: Reference wavelength is 587.6 nm (d-line). An effective radius of aperture S1 (surface 8) is 3.386 mm. TABLE 4B Aspheric coefficients Surface # 1 2 4 5 k = 0,00000E+00 0,00000E+00 -6,46578E+01 -3,74771E+00 A4 = -2,19476E-03 5,18427E-03 5,79861E-03 -3,59166E-03 A6 = 9,46908E-05 -5,04046E-04 -9,49573E-04 -4,96724E-04 A8 = 2,73956E-06 4,80310E-05 7,01729E-05 6,16894E-05 A10 = - - -6,08961E-06 -5,38018E-06 Surface # 6 7 9 10 k = 7,40823E+00 -2,99815E+00 9,00000E+01 -3,31533E+00 A4 = -6,16700E-03 -2,10472E-03 -8,89027E-04 -4,23699E-03 A6 = -4,07753E-04 -1,20984E-04 2,37643E-05 -6,62830E-04 A8 = 3,73164E-05 1,63650E-05 -1,22880E-05 2,15835E-04 A10 = -1,50511E-06 -1,07120E-06 9,06184E-07 -1,78157E-05 A12 = - - - 4,91829E-07 Surface # 11 12 13 14 k = -7,49010E-01 -6,73003E-01 9,43842E-01 -1,69396E+01 A4 = 1,58998E-02 -2,58864E-03 6,49826E-03 2,22879E-02 A6 = -9,23553E-04 1,41666E-03 -7,96703E-04 -2,40271E-03 A8 = 2,26172E-04 -1,44416E-04 1,88386E-05 1,21845E-04 A10 = -1,74483E-05 8,70145E-06 -7,02106E-10 -3,03139E-06 A12 = 4,91636E-07 -1,99784E-07 -2,39514E-09 2,87956E-08 Surface # 15 16 k = -4,27120E+00 -3,18954E+00 A4 = -7,51831E-03 -5,97073E-03 A6 = 2,48315E-04 3,50234E-04 A8 = -2,33910E-06 -1,31634E-05 A10 = 8,19792E-07 3,23276E-07 A12 = -6,05063E-08 -5,17760E-09 A14 = 1,46338E-09 4,90602E-11 A16 = -1,16811E-11 -2,12438E-13

[0132] In the fourth embodiment, the equation for the aspherical surface profiles of the aforementioned lens elements is the same as in the first embodiment. The definitions of the parameters listed in Table 4C are also the same as in the first embodiment, with the corresponding values ​​for the fourth embodiment, so no further explanation is given.

[0133] Furthermore, these parameters from Table 4A and Table 4B can be calculated as the following values ​​and satisfy the following conditions: TABLE 4C Schematic parameters f [mm] 7,54 |f6 / f7] 0,58 Fno 1,80 |f / R9|+|f / R10| 5,86 HFOV [Grade] 46,3 R6 / R7 -0,07 FOV [degrees] 92,6 R10 / R11 -0,37 TL / ImgH 1,71 (R3-R4) / (R3+R4) 0,48 TL / f 1,81 ΣCT / ΣAT 4,42 SL / f 1,58 CT6 / CT2 0,67 TL / R1 -0,37 (T12+T23+T56+T67) / (T34+T45) 0,33 TL / R3 -0,70 T34 / T45 1,48 tan(HFOV) 1,05 T67 / T45 0,42 f / f1 +f / f2 1,12 V4 56,0 |f4 / f7| 0,62 Y7R2 / Y2R1 3,04 |f5 / f6| 0,97 - - 5. Design

[0134] Fig. Figure 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 5th embodiment. Fig.9 The image acquisition unit 5 comprises the optical image acquisition system (whose reference numeral is omitted) of the present disclosure and an image sensor IS. The optical image acquisition system comprises, in order from an object side to an image side along an optical axis, a first lens element E1, an aperture diaphragm ST, a second lens element E2, a third lens element E3, an aperture S1, 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 optical image acquisition system comprises seven lens elements (E1, E2, E3, E4, E5, E6, and E7), with no additional lens element arranged between any of the adjacent seven lens elements.

[0135] The first lens element E1, with positive refractive power, has an object-side surface that is concave in a paraxial region and an image-side surface that is convex in a paraxial region. The first lens element E1 is made of plastic material and both its object-side and image-side surfaces are aspherical. The object-side surface of the first lens element E1 has an inflection point. The image-side surface of the first lens element E1 has an inflection point.

[0136] The second lens element E2, with positive refractive power, has an object-side surface that is concave in a paraxial region and an image-side surface that is convex in a paraxial region. The second lens element E2 is made of plastic material and both its object-side and image-side surfaces are aspherical.

[0137] The third lens element E3, 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. The third lens element E3 is made of plastic material and both its object-side and image-side surfaces are aspherical. The object-side surface of the third lens element E3 has an inflection point. The image-side surface of the third lens element E3 has an inflection point. The object-side surface of the third lens element E3 has a critical point in an off-axis region. The image-side surface of the third lens element E3 has a critical point in an off-axis region.

[0138] The fourth lens element E4, with positive refractive power, has an object-side surface that is convex in a paraxial region and an image-side surface that is also convex in a paraxial region. The fourth lens element E4 is made of plastic material and both its object-side and image-side surfaces are aspherical. The object-side surface of the fourth lens element E4 has an inflection point. The object-side surface of the fourth lens element E4 has a critical point in an off-axis region.

[0139] The fifth lens element E5, with negative refractive power, has an object-side surface that is concave in a paraxial region and an image-side surface that is convex in a paraxial region. The fifth lens element E5 is made of plastic material, and both the object-side and image-side surfaces are aspheric. The object-side surface of the fifth lens element E5 has two inflection points. The image-side surface of the fifth lens element E5 has one inflection point. The image-side surface of the fifth lens element E5 has a critical point in an off-axis region.

[0140] The sixth lens element E6, with positive refractive power, has an object-side surface that is convex in a paraxial region and an image-side surface that is also convex in a paraxial region. The sixth lens element E6 is made of plastic material and both its object-side and image-side surfaces are 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 one critical point in an off-axis region. The image-side surface of the sixth lens element E6 has two critical points in an off-axis region.

[0141] 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. The seventh lens element E7 is made of plastic material and both its object-side and image-side surfaces are aspherical. The object-side surface of the seventh lens element E7 has four 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 one critical point in an off-axis region. The image-side surface of the seventh lens element E7 has one critical point in an off-axis region.

[0142] 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 optical image acquisition system. The IS image sensor is located on or near the image surface IMG of the optical image acquisition system.

[0143] The detailed optical data of the 5th embodiment are listed in Table 5A and the aspherical surface data in Table 5B below. TABLE 5A 5. Design f = 6.68 mm, Fno = 1.60, HFOV = 45.9 degrees Surface # radius of curvature thickness material index Abbe # Focal length 0 object infinity infinity 1 Lens 1 -22,6711 (ASP) 1,175 plastic 1,587 28,3 13,91 2 -6,1185 (ASP) -0,206 3 Ape.-Blender Plano 0,261 4 Lens 2 -29,0740 (ASP) 1,767 plastic 1,544 56,0 14,64 5 -6,3846 (ASP) 0,050 6 Lens 3 9,3076 (ASP) 0,670 plastic 1,642 22,5 -12,30 7 4,1503 (ASP) 0,600 8 Aperture Plano 0,026 9 Lens 4 18,3436 (ASP) 1,757 plastic 1,544 56,0 10,14 10 -7,6191 (ASP) 0,820 11 Lens 5 -1,8924 (ASP) 0,689 plastic 1,661 20,3 -8,94 12 -3,1875 (ASP) 0,050 13 Lens 6 6,9287 (ASP) 1,132 plastic 1,545 56,1 7,33 14 -8,9008 (ASP) 0,050 15 Lens 7 2,6409 (ASP) 1,153 plastic 1,562 44,6 -18,42 16 1,7736 (ASP) 1,500 17 filter Plano 0,210 Glass 1,517 64,2 - 18 Plano 0,719 19 Picture Plano - Note: Reference wavelength is 587.6 nm (d-line). An effective radius of aperture S1 (surface 8) is 2.989 mm. TABLE 5B Aspheric coefficients Surface # 1 2 4 5 k = 0,00000E+00 0,00000E+00 3,57293E+01 -1,42959E+00 A4 = -2,72624E-03 7,81978E-03 6,17462E-03 -5,77453E-03 A6 = 3,59764E-04 -8,50314E-04 -1,82797E-03 -4,78169E-04 A8 = 7,86693E-07 1,20548E-04 2,36714E-04 7,91108E-05 A10 = - - -2,64233E-05 -1,01906E-05 Surface # 6 7 9 10 k = 7,41416E+00 -3,47862E+00 -8,99966E+01 -2,53712E+00 A4 = -8,68517E-03 -2,80445E-03 -1,70209E-03 -6,59852E-03 A6 = -3,09570E-04 -3,17796E-05 4,14443E-04 3,22073E-05 A8 = 4,01751E-05 1,01700E-05 -7,08961E-05 1,48078E-04 A10 = -3,31853E-06 -1,79141E-06 3,04312E-06 -1,73801E-05 A12 = - - - 5,89332E-07 Surface # 11 12 13 14 k = -7,50496E-01 -7,20628E-01 3,03240E-01 -1,15965E+01 A4 = 1,95669E-02 -3,52800E-03 5,96216E-03 2,75560E-02 A6 = -1,23510E-03 1,60445E-03 -8,83851E-04 -3,35855E-03 A8 = 3,32198E-04 -1,48834E-04 2,68253E-05 1,95928E-04 A10 = -2,82008E-05 1,09714E-05 -5,09283E-07 -5,75266E-06 A12 = 8,84272E-07 -3,33697E-07 8,49806E-09 6,61462E-08 Surface # 15 16 k = -3,32707E+00 -2,93137E+00 A4 = -8,91212E-03 -6,17074E-03 A6 = 3,73991E-04 1,97782E-04 A8 = -4,55983E-05 1,23511E-05 A10 = 7,33396E-06 -1,52711E-06 A12 = -5,01884E-07 6,87511E-08 A14 = 1,62187E-08 -1,65239E-09 A16 = -2,48277E-10 2,09866E-11 A18 = 1,44310E-12 -1,11237E-13

[0144] 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 the parameters listed in Table 5C are also the same as those in the 1st embodiment, with the corresponding values ​​for the 5th embodiment, so no further explanation is given here.

[0145] Furthermore, these parameters from Table 5A and Table 5B can be calculated as the following values ​​and satisfy the following conditions: TABLE 5C Schematic parameters f [mm] 6,68 |f6 / f7] 0,40 Fno 1,60 |f / R9|+|f / R10| 5,63 HFOV [Grade] 45,9 R6 / R7 0,23 FOV [degrees] 91,7 R10 / R11 -0,46 TL / ImgH 1,76 (R3-R4) / (R3+R4) 0,64 TL / f 1,86 ΣCT / ΣAT 5,05 SL / f 1,71 CT6 / CT2 0,64 TL / R1 -0,55 (T12+T23+T56+T67) / (T34+T45) 0,14 TL / R3 -0,43 T34 / T45 0,76 tan(HFOV) 1,03 T67 / T45 0,06 f / f1 +f / f2 0,94 V4 56,0 |f4 / f7| 0,55 Y7R2 / Y2R1 2,89 |f5 / f6| 1,22 - - 6. Design

[0146] Fig. Figure 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 5th embodiment. Fig.11 The image acquisition unit 6 comprises the optical image acquisition system (whose reference numeral is omitted) of the present disclosure and an image sensor IS. The optical image acquisition system comprises, in order from an object side to an image side along an optical axis, a first lens element E1, an aperture diaphragm ST, a second lens element E2, a third lens element E3, an aperture S1, 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 optical image acquisition system comprises seven lens elements (E1, E2, E3, E4, E5, E6, and E7), with no additional lens element arranged between any of the adjacent seven lens elements.

[0147] The first lens element E1, with positive refractive power, has an object-side surface that is convex in a paraxial region and an image-side surface that is also convex in a paraxial region. The first lens element E1 is made of plastic material and both its object-side and image-side surfaces are aspherical. The object-side surface of the first lens element E1 has two inflection points. The image-side surface of the first lens element E1 has one inflection point.

[0148] The second lens element E2, with positive refractive power, has an object-side surface that is concave in a paraxial region and an image-side surface that is convex in a paraxial region. The second lens element E2 is made of plastic material and both its object-side and image-side surfaces are aspherical.

[0149] The third lens element E3, 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. The third lens element E3 is made of plastic material and both its object-side and image-side surfaces are aspherical. The object-side surface of the third lens element E3 has an inflection point. The image-side surface of the third lens element E3 has an inflection point. The object-side surface of the third lens element E3 has a critical point in an off-axis region.

[0150] The fourth lens element E4, with positive refractive power, has an object-side surface that is convex in a paraxial region and an image-side surface that is also convex in a paraxial region. The fourth lens element E4 is made of plastic material and both its object-side and image-side surfaces are aspherical. The object-side surface of the fourth lens element E4 has an inflection point. The image-side surface of the fourth lens element E4 has an inflection point. The object-side surface of the fourth lens element E4 has a critical point in an off-axis region.

[0151] The fifth lens element E5, with negative refractive power, has an object-side surface that is concave in a paraxial region and an image-side surface that is convex in a paraxial region. The fifth lens element E5 is made of plastic material and both its object-side and image-side surfaces are aspherical. The object-side surface of the fifth lens element E5 has two inflection points. The image-side surface of the fifth lens element E5 has one inflection point. The image-side surface of the fifth lens element E5 has a critical point in an off-axis region.

[0152] The sixth lens element E6, with positive refractive power, has an object-side surface that is convex in a paraxial region and an image-side surface that is also convex in a paraxial region. The sixth lens element E6 is made of plastic material and both its object-side and image-side surfaces are aspherical. The object-side surface of the sixth lens element E6 has two inflection points. 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 one critical point in an off-axis region. The image-side surface of the sixth lens element E6 has two critical points in an off-axis region.

[0153] 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. The seventh lens element E7 is made of plastic material and both its object-side and image-side surfaces are aspherical. The object-side surface of the seventh lens element E7 has four 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 three critical points in an off-axis region. The image-side surface of the seventh lens element E7 has one critical point in an off-axis region.

[0154] 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 optical image acquisition system. The IS image sensor is located on or near the image surface IMG of the optical image acquisition system.

[0155] The detailed optical data of the 6th embodiment are listed in Table 6A and the aspherical surface data are listed in Table 6B below. TABLE 6A 6. Design f = 6.93 mm, Fno = 1.80, HFOV = 45.0 degrees Surface # radius of curvature thickness material index Abbe # Focal length 0 object infinity infinity 1 Lens 1 19,6078 (ASP) 0,894 plastic 1,567 37,4 9,05 2 -6,8235 (ASP) -0,145 3 Ape.-Blender Plano 0,211 4 Lens 2 -8,7761 (ASP) 1,550 plastic 1,544 56,0 35,25 5 -6,3954 (ASP) 0,050 6 Lens 3 9,2591 (ASP) 0,712 plastic 1,660 20,4 -13,10 7 4,3339 (ASP) 0,545 8 Aperture Plano 0,117 9 Lens 4 21,6542 (ASP) 1,803 plastic 1,551 44,8 10,43 10 -7,5896 (ASP) 0,677 11 Lens 5 -1,8838 (ASP) 0,600 plastic 1,669 19,5 -8,29 12 -3,2160 (ASP) 0,050 13 Lens 6 7,0824 (ASP) 1,252 plastic 1,551 44,8 5,77 14 -5,4025 (ASP) 0,057 15 Lens 7 3,2550 (ASP) 1,241 plastic 1,567 37,4 -9,80 16 1,7693 (ASP) 1,500 17 filter Plano 0,210 Glass 1,517 64,2 - 18 Plano 0,659 19 Picture Plano - Note: Reference wavelength is 587.6 nm (d-line). An effective radius of aperture S1 (surface 8) is 2.818 mm. TABLE 6B Aspheric coefficients Surface # 1 2 4 5 k = 0,00000E+00 0,00000E+00 -1,26947E+01 -2,33385E+00 A4 = -3,42313E-03 6,97612E-03 5,68537E-03 -3,60869E-03 A6 = -3,89067E-06 -5,41015E-04 -9,77981E-04 -9,92792E-04 A8 = 6,51041E-05 1,08591E-04 6,06867E-05 1,13712E-04 A10 = - - -1,63521E-05 -1,16848E-05 Surface # 6 7 9 10 k = 8,53069E+00 -3,89897E+00 -8,23435E+01 -2,18491E+00 A4 = -9,53337E-03 -3,52745E-03 -1,34350E-03 -7,80449E-03 A6 = -2,05685E-04 1,80745E-04 3,61268E-04 5,74713E-04 A8 = 4,24440E-05 -5,51530E-06 -1,04882E-04 3,65314E-05 A10 = -5,29275E-06 -2,08749E-06 6,21562E-06 -9,17370E-06 A12 = - - - 4,49815E-07 Surface # 11 12 13 14 k = -7,49479E-01 -6,73201E-01 -1,96541E-02 -1,19073E+01 A4 = 1,80192E-02 -1,53448E-03 5,51081E-03 2,80174E-02 A6 = -6,61377E-04 7,55537E-04 -8,52913E-04 -3,42449E-03 A8 = 2,28394E-04 4,49649E-06 2,81006E-05 2,00178E-04 A10 = -1,94736E-05 -1,45688E-06 -6,66854E-07 -5,87559E-06 A12 = 6,16704E-07 3,09759E-08 1,38060E-08 6,72421E-08 Surface # 15 16 k = -3,51641E+00 -3,36709E+00 A4 = -9,16259E-03 -4,92323E-03 A6 = 2,60016E-04 9,62633E-05 A8 = -4,55799E-06 1,45734E-05 A10 = 2,39415E-06 -1,25497E-06 A12 = -1,94877E-07 4,32955E-08 A14 = 5,60861E-09 -7,20975E-10 A16 = -5,50821E-11 4,73555E-12

[0156] In the 6th 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 the parameters listed in Table 6C are also the same as in the 1st embodiment, with corresponding values ​​for the 6th embodiment, so no further explanation is given here.

[0157] Furthermore, these parameters from Table 6A and Table 6B can be calculated as the following values ​​and satisfy the following conditions: TABLE 6C Schematic parameters f [mm] 6,93 |f6 / f7] 0,59 Fno 1,80 |f / R9|+|f / R10| 5,83 HFOV [Grade] 45,0 R6 / R7 0,20 FOV [degrees] 90,0 R10 / R11 -0,45 TL / ImgH 1,70 (R3-R4) / (R3+R4) 0,16 TL / f 1,73 ΣCT / ΣAT 5,15 SL / f 1,62 CT6 / CT2 0,81 TL / R1 0,61 (T12+T23+T56+T67) / (T34+T45) 0,17 TL / R3 -1,37 T34 / T45 0,98 tan(HFOV) 1,00 T67 / T45 0,08 f / f1 +f / f2 0,96 V4 44,8 |f4 / f7| 1,06 Y7R2 / Y2R1 3,34 |f5 / f6| 1,44 - - 7. Design

[0158] Fig. Figure 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 comprises the optical image acquisition system (whose reference numeral is omitted) of the present disclosure and an image sensor IS. The optical image acquisition system comprises, in order from an object side to an image side along an optical axis, a first lens element E1, an aperture diaphragm ST, a second lens element E2, a third lens element E3, an aperture S1, 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 optical image acquisition system comprises seven lens elements (E1, E2, E3, E4, E5, E6, and E7), with no additional lens element arranged between any of the adjacent seven lens elements.

[0159] The first lens element E1, with positive refractive power, has an object-side surface that is concave in a paraxial region and an image-side surface that is convex in a paraxial region. The first lens element E1 is made of glass and both its object-side and image-side surfaces are aspherical. The object-side surface of the first lens element E1 exhibits an inflection point. The image-side surface of the first lens element E1 also exhibits an inflection point.

[0160] The second lens element E2, with positive refractive power, has an object-side surface that is concave in a paraxial region and an image-side surface that is convex in a paraxial region. The second lens element E2 is made of plastic material and both its object-side and image-side surfaces are aspherical. The object-side surface of the second lens element E2 has two inflection points.

[0161] The third lens element E3, 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. The third lens element E3 is made of plastic material and both its object-side and image-side surfaces are aspherical. The object-side surface of the third lens element E3 has an inflection point. The image-side surface of the third lens element E3 has an inflection point. The object-side surface of the third lens element E3 has a critical point in an off-axis region.

[0162] The fourth lens element E4, with positive refractive power, has an object-side surface that is convex in a paraxial region and an image-side surface that is also convex in a paraxial region. The fourth lens element E4 is made of plastic material and both its object-side and image-side surfaces are aspherical. The object-side surface of the fourth lens element E4 has an inflection point. The image-side surface of the fourth lens element E4 has an inflection point. The object-side surface of the fourth lens element E4 has a critical point in an off-axis region.

[0163] The fifth lens element E5, with negative refractive power, has an object-side surface that is concave in a paraxial region and an image-side surface that is convex in a paraxial region. The fifth lens element E5 is made of plastic material and both its object-side and image-side surfaces are aspherical. The object-side surface of the fifth lens element E5 has two inflection points. The image-side surface of the fifth lens element E5 has one inflection point. The object-side surface of the fifth lens element E5 has a critical point in an off-axis region. The image-side surface of the fifth lens element E5 has a critical point in an off-axis region.

[0164] The sixth lens element E6, with positive refractive power, has an object-side surface that is concave in a paraxial region and an image-side surface that is convex in a paraxial region. The sixth lens element E6 is made of plastic material and has aspheric object-side and image-side surfaces. The object-side surface of the sixth lens element E6 has three inflection points. 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 two critical points in an off-axis region. The image-side surface of the sixth lens element E6 has two critical points in an off-axis region.

[0165] 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. The seventh lens element E7 is made of plastic material and both its object-side and image-side surfaces are 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. The image-side surface of the seventh lens element E7 has a critical point in an off-axis region.

[0166] The E8 filter is made of glass and is positioned between the seventh lens element E7 and the image surface IMG. It does not affect the focal length of the optical image acquisition system. The IS image sensor is located on or near the image surface IMG of the optical image acquisition system.

[0167] The detailed optical data of the 7th embodiment are listed in Table 7A and the aspherical surface data are listed in Table 7B below. TABLE 7A 7. Design f = 6.97 mm, Fno = 1.80, HFOV = 45.5 degrees Surface # radius of curvature thickness material index Abbe # Focal length 0 object infinity infinity 1 Lens 1 -30,5497 (ASP) 2,076 Glass 1,769 49,3 8,84 2 -5,7257 (ASP) -0,210 3 Ape.-Blender Plano 0,392 4 Lens 2 -15,9282 (ASP) 1,355 plastic 1,544 56,0 17,80 5 -6,2034 (ASP) 0,050 6 Lens 3 9,6041 (ASP) 0,626 plastic 1,614 26 -11,01 7 3,8678 (ASP) 0,690 8 Aperture Plano 0,158 9 Lens 4 58,8235 (ASP) 1,625 plastic 1,544 56,0 8,90 10 -5,2227 (ASP) 0,653 11 Lens 5 -1,9074 (ASP) 0,700 plastic 1,642 22,5 -11,33 12 -2,9572 (ASP) 0,050 13 Lens 6 -14,9254 (ASP) 0,900 plastic 1,535 55,9 9,18 14 -3,7710 (ASP) 0,050 15 Lens 7 3,8257 (ASP) 1,425 plastic 1,545 56,1 -11,05 16 2,0321 (ASP) 1,500 17 filter Plano 0,210 Glass 1,517 64,2 - 18 Plano 0,537 19 Picture Plano - Note: Reference wavelength is 587.6 nm (d-line). An effective radius of aperture S1 (surface 8) is 2.818 mm. TABLE 7B Aspheric coefficients Surface # 1 2 4 5 k = 0,00000E+00 0,00000E+00 -4,72599E+01 -2,36482E+00 A4 = -2,31188E-03 8,12282E-03 7,92178E-03 -4,10450E-03 A6 = 1,06658E-04 -9,59356E-04 -1,81399E-03 -8,95597E-04 A8 = 5,00883E-06 1,06223E-04 1,81336E-04 1,41702E-04 A10 = - - -1,72955E-05 -1,52780E-05 Surface # 6 7 9 10 k = 1,02255E+01 -2,85412E+00 5,50795E+01 -6,40942E+00 A4 = -8,70563E-03 -2,48171E-03 7,78139E-05 -5,62225E-03 A6 = -7,63291E-04 -2,38035E-04 2,14591E-04 -1,67198E-04 A8 = 1,49244E-04 6,46444E-05 -4,76111E-05 2,36635E-04 A10 = -1,15235E-05 -5,37834E-06 1,09832E-06 -3,18806E-05 A12 = - - - 1,31022E-06 Surface # 11 12 13 14 k = -7,48528E-01 -8,20183E-01 -9,00000E+01 -5,21601E+00 A4 = 1,48332E-02 -6,51408E-04 2,07509E-02 3,41686E-02 A6 = 1,08507E-03 1,79100E-03 -2,61061E-03 -3,92461E-03 A8 = -7,48906E-05 -2,33759E-04 1,50188E-04 2,17177E-04 A10 = 2,76496E-06 1,80358E-05 -5,81599E-06 -6,13659E-06 A12 = 2,18230E-08 -5,21378E-07 1,10201E-07 6,84759E-08 Surface # 15 16 k = -2,73666E+00 -4,46980E+00 A4 = -7,61209E-03 -1,17689E-03 A6 = 1,59237E-04 -3,21301E-04 A8 = -8,11356E-06 3,88078E-05 A10 = 2,78141E-06 -2,23791E-06 A12 = -2,04203E-07 7,05098E-08 A14 = 5,68406E-09 -1,15972E-09 A16 = -5,53509E-11 7,73650E-12

[0168] In the 7th 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 the parameters listed in Table 7C are also the same as those in the 1st embodiment, with the corresponding values ​​for the 7th embodiment, so no further explanation is given here. TABLE 7C Schematic parameters f [mm] 6,97 If6 / f71 0,83 Fno 1,80 |f / R9|+|f / R10| 6,01 HFOV [Grade] 45,5 R6 / R7 0,07 FOV [degrees] 91,0 R10 / R11 0,20 TL / ImgH 1,81 (R3-R4) / (R3+R4) 0,44 TL / f 1,84 ΣCT / ΣAT 4,75 SL / f 1,57 CT6 / CT2 0,66 TL / R1 -0,42 (T12+T23+T56+T67) / (T34+T45) 0,22 TL / R3 -0,80 T34 / T45 1,30 tan(HFOV) 1,02 T67 / T45 0,08 f / f1 +f / f2 1,18 V4 56,0 |f4 / f7| 0,81 Y7R2 / Y2R1 2,88 |f5 / f6| 1,23 - - 8. Design

[0169] Fig. Figure 15 is a schematic view of an image acquisition unit according to the 8th embodiment of the present disclosure. Fig. Figure 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.In Section 15, the image acquisition unit 8 comprises the optical image acquisition system (whose reference numeral is omitted) of the present disclosure and an image sensor IS. The optical image acquisition system comprises, in order from an object side to an image side along an optical axis, a first lens element E1, an aperture diaphragm ST, a second lens element E2, a third lens element E3, an aperture S1, 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 optical image acquisition system comprises seven lens elements (E1, E2, E3, E4, E5, E6, and E7), with no additional lens element arranged between any of the adjacent seven lens elements.

[0170] The first lens element E1, with positive refractive power, has an object-side surface that is concave in a paraxial region and an image-side surface that is convex in a paraxial region. The first lens element E1 is made of plastic material and both its object-side and image-side surfaces are aspherical. The object-side surface of the first lens element E1 has an inflection point. The image-side surface of the first lens element E1 has an inflection point.

[0171] The second lens element E2, with positive refractive power, has an object-side surface that is concave in a paraxial region and an image-side surface that is convex in a paraxial region. The second lens element E2 is made of plastic material and both its object-side and image-side surfaces are aspherical.

[0172] The third lens element E3, 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. The third lens element E3 is made of plastic material and both its object-side and image-side surfaces are aspherical. The object-side surface of the third lens element E3 has an inflection point. The image-side surface of the third lens element E3 has an inflection point. The object-side surface of the third lens element E3 has a critical point in an off-axis region.

[0173] The fourth lens element E4, with positive refractive power, has an object-side surface that is convex in a paraxial region and an image-side surface that is also convex in a paraxial region. The fourth lens element E4 is made of plastic material and both its object-side and image-side surfaces are aspherical. The object-side surface of the fourth lens element E4 has an inflection point. The object-side surface of the fourth lens element E4 has a critical point in an off-axis region.

[0174] The fifth lens element E5, with negative refractive power, has an object-side surface that is concave in a paraxial region and an image-side surface that is convex in a paraxial region. The fifth lens element E5 is made of plastic material and both its object-side and image-side surfaces are aspherical. The object-side surface of the fifth lens element E5 has two inflection points. The image-side surface of the fifth lens element E5 has one inflection point. The object-side surface of the fifth lens element E5 has a critical point in an off-axis region. The image-side surface of the fifth lens element E5 has a critical point in an off-axis region.

[0175] The sixth lens element E6, with positive refractive power, has an object-side surface that is convex in a paraxial region and an image-side surface that is also convex in a paraxial region. The sixth lens element E6 is made of plastic material and both its object-side and image-side surfaces are 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 two inflection points. The object-side surface of the sixth lens element E6 has one critical point in an off-axis region. The image-side surface of the sixth lens element E6 has two critical points in an off-axis region.

[0176] 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. The seventh lens element E7 is made of plastic material and both its object-side and image-side surfaces are 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. The image-side surface of the seventh lens element E7 has a critical point in an off-axis region.

[0177] 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 optical image acquisition system. The IS image sensor is located on or near the image surface IMG of the optical image acquisition system.

[0178] The detailed optical data of the 8th embodiment are listed in Table 8A and the aspherical surface data are listed in Table 8B below. TABLE 8A 8. Design f = 6.06 mm, Fno = 1.70, HFOV = 50.0 degrees Surface # radius of curvature thickness material index Abbe # Focal length 0 object infinity infinity 1 Lens 1 -9,5641 (ASP) 1,274 plastic 1,614 25,6 13,98 2 -4,7507 (ASP) -0,223 3 Ape.-Blender Plano 0,295 4 Lens 2 -45,0849 (ASP) 1,395 plastic 1,562 44,6 12,37 5 -6,0885 (ASP) 0,050 6 Lens 3 9,6859 (ASP) 0,640 plastic 1,650 21,8 -10,97 7 3,9997 (ASP) 0,610 8 Aperture Plano -0,053 9 Lens 4 11,9469 (ASP) 2,011 plastic 1,544 56,0 9,86 10 -9,1549 (ASP) 0,640 11 Lens 5 -1,8915 (ASP) 0,779 plastic 1,697 16,3 -9,04 12 -3,1596 (ASP) 0,050 13 Lens 6 6,9908 (ASP) 1,132 plastic 1,545 56,1 6,99 14 -7,8859 (ASP) 0,050 15 Lens 7 2,4128 (ASP) 1,000 plastic 1,614 25,6 -19,68 16 1,6940 (ASP) 1,500 17 filter Plano 0,210 Glass 1,517 64,2 - 18 Plano 0,649 19 Picture Plano - Note: Reference wavelength is 587.6 nm (d-line). An effective radius aperture S1 (surface 8) is 2.899 mm. TABLE 8B Aspheric coefficients Surface # 1 2 4 5 k = 0,00000E+00 0,00000E+00 8,94791E+01 8,33644E-01 A4 = -2,66096E-03 9,51944E-03 3,91242E-03 -6,86406E-03 A6 = 3,42517E-04 -1,26488E-03 -1,71978E-03 -2,86897E-04 A8 = 7,25658E-06 2,07708E-04 1,66869E-04 5,91971E-05 A10 = - - -2,13590E-05 -1,46087E-05 Surface # 6 7 9 10 k = 8,28679E+00 -3,44472E+00 -2,11117E+01 -1,01294E+00 A4 = -8,14542E-03 -2,46859E-03 -1,76749E-03 -7,44724E-03 A6 = -5,03419E-04 -1,13074E-04 6,29970E-04 4,98843E-04 A8 = 5,13343E-05 1,33516E-05 -9,44136E-05 5,48217E-05 A10 = -3,48161E-06 -1,89598E-06 3,73939E-06 -1,00052E-05 A12 = - - - 3,63554E-07 Surface # 11 12 13 14 k = -7,50075E-01 -8,20791E-01 5,79303E-01 -6,51471E+00 A4 = 1,87984E-02 -3,66291E-03 6,29103E-03 2,89805E-02 A6 = -5,78045E-04 1,65088E-03 -8,40335E-04 -3,26328E-03 A8 = 2,32334E-04 -1,43013E-04 2,30946E-05 1,76011E-04 A10 = -2,20128E-05 1,06471E-05 -6,65352E-07 -4,82631E-06 A12 = 7,50295E-07 -3,34034E-07 1,63631E-08 5,18045E-08 Surface # 15 16 k = -2,74250E+00 -2,71307E+00 A4 = -8,73535E-03 -7,13865E-03 A6 = 2,16606E-04 2,49648E-04 A8 = -2,31605E-05 5,83012E-06 A10 = 4,75517E-06 -8,37723E-07 A12 = -3,17190E-07 2,98893E-08 A14 = 8,62959E-09 -4,86950E-10 A16 = -8,41225E-11 3,10259E-12

[0179] In the 8th 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 the parameters listed in Table 8C are also the same as those in the 1st embodiment, with the corresponding values ​​for the 8th embodiment, so no further explanation is given here.

[0180] Furthermore, these parameters from Table 8A and Table 8B can be calculated as the following values ​​and satisfy the following conditions: TABLE 8C Schematic parameters f [mm] 6,06 |f6 / f7| 0,36 Fno 1,70 |f / R9|+|f / R10| 5,12 HFOV [Grade] 50,0 R6 / R7 0,33 FOV [degrees] 100,0 R10 / R11 -0,45 TL / lmgH 1,70 (R3-R4) / (R3+R4) 0,76 TL / f 1,98 ΣCT / ΣAT 5,80 SL / f 1,81 CT6 / CT2 0,81 TL / R1 -1,26 (T12+T23+T56+T67) / (T34+T45) 0,19 TL / R3 -0,27 T34 / T45 0,87 tan(HFOV) 1,19 T67 / T45 0,08 f / f1+f / f2 0,92 V4 56,0 |f4 / f7| 0,50 Y7R2 / Y2R1 3,10 |f5 / f6| 1,29 - - 9. Design

[0181] Fig. Figure 17 is a schematic view of an image acquisition unit according to the 9th embodiment of the present disclosure. Fig. Figure 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 embodiment 9. Fig.17 The image acquisition unit 9 comprises the optical image acquisition system (whose reference numeral is omitted) of the present disclosure and an image sensor IS. The optical image acquisition system comprises, in order from an object side to an image side along an optical axis, a first lens element E1, an aperture diaphragm ST, a second lens element E2, a third lens element E3, an aperture S1, 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 optical image acquisition system comprises seven lens elements (E1, E2, E3, E4, E5, E6, and E7), with no additional lens element arranged between any of the adjacent seven lens elements.

[0182] The first lens element E1, with negative refractive power, has an object-side surface that is concave in a paraxial region and an image-side surface that is convex in a paraxial region. The first lens element E1 is made of plastic material and both its object-side and image-side surfaces are aspherical. The object-side surface of the first lens element E1 has an inflection point. The image-side surface of the first lens element E1 has an inflection point.

[0183] The second lens element E2, with positive refractive power, has an object-side surface that is convex in a paraxial region and an image-side surface that is also convex in a paraxial region. The second lens element E2 is made of plastic material and both its object-side and image-side surfaces are aspherical. The object-side surface of the second lens element E2 has an inflection point.

[0184] The third lens element E3, 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. The third lens element E3 is made of plastic material and both its object-side and image-side surfaces are aspherical. The object-side surface of the third lens element E3 has an inflection point. The image-side surface of the third lens element E3 has an inflection point. The object-side surface of the third lens element E3 has a critical point in an off-axis region.

[0185] The fourth lens element E4, with positive refractive power, has an object-side surface that is convex in a paraxial region and an image-side surface that is also convex in a paraxial region. The fourth lens element E4 is made of plastic material and both its object-side and image-side surfaces are aspherical. The object-side surface of the fourth lens element E4 has an inflection point. The object-side surface of the fourth lens element E4 has a critical point in an off-axis region.

[0186] The fifth lens element E5, with negative refractive power, has an object-side surface that is concave in a paraxial region and an image-side surface that is convex in a paraxial region. The fifth lens element E5 is made of plastic material and both its object-side and image-side surfaces are aspherical. The object-side surface of the fifth lens element E5 has two inflection points. The image-side surface of the fifth lens element E5 has one inflection point. The image-side surface of the fifth lens element E5 has a critical point in an off-axis region.

[0187] The sixth lens element E6, with positive refractive power, has an object-side surface that is convex in a paraxial region and an image-side surface that is also convex in a paraxial region. The sixth lens element E6 is made of plastic material and both its object-side and image-side surfaces are aspherical. The object-side surface of the sixth lens element E6 has two inflection points. 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 one critical point in an off-axis region. The image-side surface of the sixth lens element E6 has two critical points in an off-axis region.

[0188] 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. The seventh lens element E7 is made of plastic material and both its object-side and image-side surfaces are aspherical. The object-side surface of the seventh lens element E7 has four 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 one critical point in an off-axis region. The image-side surface of the seventh lens element E7 has one critical point in an off-axis region.

[0189] 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 optical image acquisition system. The IS image sensor is located on or near the image surface IMG of the optical image acquisition system.

[0190] The detailed optical data of the 9th embodiment are listed in Table 9A and the aspherical surface data are listed in Table 9B below. TABLE 9A 9. Design f = 7.05 mm, Fno = 1.80, HFOV = 45.0 degrees Surface # radius of curvature thickness material index Abbe # Focal length 0 object infinity infinity 1 Lens 1 -6,8549 (ASP) 1,431 plastic 1,584 28,2 -70,78 2 -8,8496 (ASP) -0,038 3 Ape.-Blender Plano 0,088 4 Lens 2 8,4429 (ASP) 2,198 plastic 1,544 56,0 7,12 5 -6,4976 (ASP) 0,569 6 Lens 3 9,0198 (ASP) 0,550 plastic 1,587 28,3 -16,66 7 4,5877 (ASP) 0,560 8 Aperture Plano 0,144 9 Lens 4 45,1186 (ASP) 1,877 plastic 1,535 55,9 11,44 10 -6,9686 (ASP) 0,815 11 Lens 5 -1,8674 (ASP) 0,600 plastic 1,650 21,8 -7,85 12 -3,3197 (ASP) 0,078 13 Lens 6 9,0145 (ASP) 1,161 plastic 1,544 56,0 6,04 14 -4,9387 (ASP) 0,050 15 Lens 7 2,9374 (ASP) 1,000 plastic 1,545 56,1 -9,96 16 1,6769 (ASP) 1,500 17 filter Plano 0,210 Glass 1,517 64,2 - 18 Plano 0,554 19 Picture Plano - Note: Reference wavelength is 587.6 nm (d-line). An effective radius of aperture S1 (surface 8) is 2.815 mm. TABLE 9B Aspheric coefficients Surface # 1 2 4 5 k = 0,00000E+00 0,00000E+00 -3,21723E+01 -4,84774E+00 A4 = 1,45630E-03 2,69137E-03 4,95266E-03 -5,35535E-03 A6 = 9,22874E-05 9,03547E-05 -1,38537E-03 -2,71086E-04 A8 = -2,80937E-06 9,17565E-06 1,73275E-04 3,91193E-05 A10 = - - -1,93390E-05 -6,11362E-06 Surface # 6 7 9 10 k = 7,78665E+00 -2,89490E+00 -3,18142E+01 2,50681 E-01 A4 = -7,93602E-03 -2,41623E-03 -2,14114E-03 -7,22075E-03 A6 = -4,22844E-04 -1,66519E-04 3,44499E-04 8,89237E-05 A8 = 4,39455E-05 2,92000E-05 -5,71880E-05 1,09477E-04 A10 = -4,59200E-06 -3,02394E-06 1,72799E-06 -1,32074E-05 A12 = - - - 4,69544E-07 Surface # 11 12 13 14 k = -7,48177E-01 -6,92325E-01 1,01057E+00 -9,94298E+00 A4 = 1,70558E-02 -9,37353E-04 7,35377E-03 2,89075E-02 A6 = -5,95544E-05 1,19750E-03 -1,02326E-03 -3,53420E-03 A8 = 1,08082E-04 -7,61515E-05 2,65401E-05 2,04555E-04 A10 = -1,07876E-05 3,54184E-06 -1,13205E-07 -5,91184E-06 A12 = 4,07344E-07 -9,23146E-08 1,18846E-09 6,64489E-08 Surface # 15 16 k = -4,11562E+00 -3,26132E+00 A4 = -9,16358E-03 -7,16490E-03 A6 = 9,40717E-05 3,95086E-04 A8 = 2,29043E-05 -1,02897E-05 A10 = 4,71445E-07 1,58147E-08 A12 = -1,27321E-07 5,40410E-09 A14 = 4,45057E-09 -1,18063E-10 A16 = -4,75359E-11 8,12832E-13

[0191] 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 the parameters listed in Table 9C are also the same as in the 1st embodiment, with corresponding values ​​for the 9th embodiment, so no further explanation is given here.

[0192] Furthermore, these parameters from Table 9A and Table 9B can be calculated as the following values ​​and satisfy the following conditions: TABLE 9C Schematic parameters f [mm] 7,05 |f6 / f7| 0,61 Fno 1,80 |f / R9|+|f / R10| 5,90 HFOV [Grade] 45,0 R6 / R7 0,10 FOV [degrees] 90,0 R10 / R11 -0,37 TL / lmgH 1,89 (R3-R4) / (R3+R4) 7,68 TL / f 1,89 ΣCT / ΣAT 3,89 SL / f 1,70 CT6 / CT2 0,53 TL / R1 -1,95 (T12+T23+T56+T67) / (T34+T45) 0,49 TL / R3 1,58 T34 / T45 0,86 tan(HFOV) 1,00 T67 / T45 0,06 f / f1+f / f2 0,89 V4 55,9 |f4 / f7| 1,15 Y7R2 / Y2R1 2,78 |f5 / f6| 1,30 - - 10. Design

[0193] Fig. Figure 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 embodiment 10. Fig.19 The image acquisition unit 10 comprises the optical image acquisition system (whose reference number is omitted) of the present disclosure and an image sensor IS. The optical image acquisition system comprises, in order from an object side to an image side along an optical axis, a first lens element E1, an aperture diaphragm ST, a second lens element E2, a third lens element E3, an aperture S1, 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 optical image acquisition system comprises seven lens elements (E1, E2, E3, E4, E5, E6, and E7), with no additional lens element arranged between any of the adjacent seven lens elements.

[0194] The first lens element E1, with positive refractive power, has an object-side surface that is concave in a paraxial region and an image-side surface that is convex in a paraxial region. The first lens element E1 is made of glass and both its object-side and image-side surfaces are aspherical. The object-side surface of the first lens element E1 has an inflection point. The image-side surface of the first lens element E1 has an inflection point.

[0195] The second lens element E2, with positive refractive power, has an object-side surface that is concave in a paraxial region and an image-side surface that is convex in a paraxial region. The second lens element E2 is made of plastic material and both its object-side and image-side surfaces are aspherical. The object-side surface of the second lens element E2 has two inflection points.

[0196] The third lens element E3, 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. The third lens element E3 is made of plastic material and both its object-side and image-side surfaces are aspherical. The object-side surface of the third lens element E3 has an inflection point. The image-side surface of the third lens element E3 has an inflection point. The object-side surface of the third lens element E3 has a critical point in an off-axis region.

[0197] The fourth lens element E4, with positive refractive power, has an object-side surface that is convex in a paraxial region and an image-side surface that is also convex in a paraxial region. The fourth lens element E4 is made of plastic material and both its object-side and image-side surfaces are aspherical. The object-side surface of the fourth lens element E4 has an inflection point. The image-side surface of the fourth lens element E4 has an inflection point. The object-side surface of the fourth lens element E4 has a critical point in an off-axis region.

[0198] The fifth lens element E5, with negative refractive power, has an object-side surface that is concave in a paraxial region and an image-side surface that is convex in a paraxial region. The fifth lens element E5 is made of plastic material and both its object-side and image-side surfaces are aspherical. The object-side surface of the fifth lens element E5 has two inflection points. The image-side surface of the fifth lens element E5 has one inflection point. The object-side surface of the fifth lens element E5 has a critical point in an off-axis region. The image-side surface of the fifth lens element E5 has a critical point in an off-axis region.

[0199] The sixth lens element E6, with positive refractive power, has an object-side surface that is convex in a paraxial region and an image-side surface that is also convex in a paraxial region. The sixth lens element E6 is made of plastic material and both its object-side and image-side surfaces are aspherical. The object-side surface of the sixth lens element E6 has two inflection points. 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 one critical point in an off-axis region. The image-side surface of the sixth lens element E6 has two critical points in an off-axis region.

[0200] 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. The seventh lens element E7 is made of plastic material and both its object-side and image-side surfaces are aspherical. The object-side surface of the seventh lens element E7 has four 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 one critical point in an off-axis region. The image-side surface of the seventh lens element E7 has one critical point in an off-axis region.

[0201] 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 optical image acquisition system. The IS image sensor is located on or near the image surface IMG of the optical image acquisition system.

[0202] The detailed optical data of the 10th embodiment are listed in Table 10A and the aspherical surface data are listed in Table 10B below. TABLE 10A 10. Design f = 6.74 mm, Fno = 1.80, HFOV = 45.9 degrees Surface # radius of curvature thickness material index Abbe # Focal length 0 object infinity infinity 1 Lens 1 -25,0000 (ASP) 1,980 Glass 1,769 44,8 9,66 2 -5,9248 (ASP) -0,187 3 Ape.-Blender Plano 0,329 4 Lens 2 -20,2167 (ASP) 1,381 plastic 1,544 56,0 15,95 5 -6,2176 (ASP) 0,050 6 Lens 3 9,6857 (ASP) 0,604 plastic 1,598 26,4 -10,77 7 3,7783 (ASP) 0,690 8 Aperture Plano 0,059 9 Lens 4 54,8389 (ASP) 1,843 plastic 1,544 56,0 8,68 10 -5,1045 (ASP) 0,658 11 Lens 5 -1,8909 (ASP) 0,750 plastic 1,640 23,3 -8,14 12 -3,4268 (ASP) 0,050 13 Lens 6 8,5583 (ASP) 1,137 plastic 1,544 56,0 6,63 14 -5,9401 (ASP) 0,048 15 Lens 7 2,8617 (ASP) 1,000 plastic 1,544 56,0 -10,52 16 1,6728 (ASP) 1,500 17 filter Plano 0,210 Glass 1,517 64,2 - 18 Plano 0,656 19 Picture Plano - Note: Reference wavelength is 587.6 nm (d-line). An effective radius of aperture S1 (surface 8) is 2,820 mm. TABLE 10B Aspheric coefficients Surface # 1 2 4 5 k = 0,00000E+00 0,00000E+00 -6,30830E+01 -1,91854E+00 A4 = -1,88133E-03 9,22827E-03 8,30550E-03 -4,85950E-03 A6 = 1,40689E-04 -1,18119E-03 -1,96300E-03 -6,25485E-04 A8 = 3,10015E-06 1,46402E-04 1,91484E-04 8,43768E-05 A10 = - - -1,34795E-05 -1,04405E-05 Surface # 6 7 9 10 k = 1,03981E+01 -2,96208E+00 9,00000E+01 -2,85454E+00 A4 = -8,94742E-03 -2,33088E-03 -9,91923E-04 -8,32964E-03 A6 = -7,50087E-04 -2,66453E-04 4,03542E-04 5,39597E-04 A8 = 1,28755E-04 6,24595E-05 -8,18211E-05 1,45444E-04 A10 = -9,89044E-06 -5,27625E-06 3,81803E-06 -2,68353E-05 A12 = - - - 1,27440E-06 Surface # 11 12 13 14 k = -7,48546E-01 -7,25093E-01 9,39864E-01 -1,63965E+01 A4 = 1,68490E-02 -2,67161E-03 7,40066E-03 2,90662E-02 A6 = 4,78256E-04 1,61846E-03 -1,07486E-03 -3,62720E-03 A8 = 3,75202E-05 -1,66716E-04 2,90172E-05 2,13861E-04 A10 = -6,65994E-06 1,25622E-05 -2,40384E-08 -6,26866E-06 A12 = 3,17157E-07 -3,81876E-07 -2,84293E-09 7,10894E-08 Surface # 15 16 k = -3,84884E+00 -3,18203E+00 A4 = -8,92341E-03 -6,97856E-03 A6 = 1,46937E-04 3,49267E-04 A8 = 2,13328E-05 -6,57718E-06 A10 = 1,10172E-07 -1,77139E-07 A12 = -9,62556E-08 1,16875E-08 A14 = 3,49984E-09 -2,27205E-10 A16 = -3,73023E-11 1,56294E-12

[0203] In the 10th 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 the parameters listed in Table 10C are also the same as in the 1st embodiment, with corresponding values ​​for the 10th embodiment, so no further explanation is given here.

[0204] Furthermore, these parameters from Table 10A and Table 10B can be calculated as the following values ​​and satisfy the following conditions: TABLE 10C Schematic parameters f [mm] 6,74 |f6 / f7| 0,63 Fno 1,80 |f / R9|+|f / R10| 5,53 HFOV [Grade] 45,9 R6 / R7 0,07 FOV [degrees] 91,8 R10 / R11 -0,40 TL / lmgH 1,81 (R3-R4) / (R3+R4) 0,53 TL / f 1,89 ΣCT / ΣAT 5,12 SL / f 1,63 CT6 / CT2 0,82 TL / R1 -0,51 (T12+T23+T56+T67) / (T34+T45) 0,21 TL / R3 -0,63 T34 / T45 1,14 tan(HFOV) 1,03 T67 / T45 0,07 f / f1+f / f2 1,12 V4 56,0 |f4 / f7| 0,82 Y7R2 / Y2R1 2,99 |f5 / f6| 1,23 - - 11. Design

[0205] Fig. Figure 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 embodiment 11. Fig.21 The image acquisition unit 11 comprises the optical image acquisition system (whose reference numeral is omitted) of the present disclosure and an image sensor IS. The optical image acquisition system comprises, in order from an object side to an image side along an optical axis, a first lens element E1, an aperture diaphragm ST, a second lens element E2, a third lens element E3, an aperture S1, 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 optical image acquisition system comprises seven lens elements (E1, E2, E3, E4, E5, E6, and E7), with no additional lens element arranged between any of the adjacent seven lens elements.

[0206] The first lens element E1, with positive refractive power, has an object-side surface that is convex in a paraxial region and an image-side surface that is also convex in a paraxial region. The first lens element E1 is made of plastic material and both its object-side and image-side surfaces are aspherical. The object-side surface of the first lens element E1 has two inflection points. The image-side surface of the first lens element E1 has one inflection point. The object-side surface of the first lens element E1 has a critical point in an off-axis region.

[0207] The second lens element E2, with negative refractive power, has an object-side surface that is concave in a paraxial region and an image-side surface that is convex in a paraxial region. The second lens element E2 is made of plastic material and has both aspherical object-side and image-side surfaces. The object-side surface of the second lens element E2 has two inflection points.

[0208] The third lens element E3, 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. The third lens element E3 is made of plastic material and both its object-side and image-side surfaces are aspherical. The object-side surface of the third lens element E3 has an inflection point. The image-side surface of the third lens element E3 has an inflection point. The object-side surface of the third lens element E3 has a critical point in an off-axis region.

[0209] The fourth lens element E4, with positive refractive power, has an object-side surface that is convex in a paraxial region and an image-side surface that is also convex in a paraxial region. The fourth lens element E4 is made of plastic material and both its object-side and image-side surfaces are aspherical. The object-side surface of the fourth lens element E4 has an inflection point. The object-side surface of the fourth lens element E4 has a critical point in an off-axis region.

[0210] The fifth lens element E5, with negative refractive power, has an object-side surface that is concave in a paraxial region and an image-side surface that is convex in a paraxial region. The fifth lens element E5 is made of plastic material and both its object-side and image-side surfaces are aspherical. The object-side surface of the fifth lens element E5 has two inflection points. The image-side surface of the fifth lens element E5 has one inflection point. The image-side surface of the fifth lens element E5 has a critical point in an off-axis region.

[0211] The sixth lens element E6, with positive refractive power, has an object-side surface that is convex in a paraxial region and an image-side surface that is also convex in a paraxial region. The sixth lens element E6 is made of plastic material and both its object-side and image-side surfaces are 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 one critical point in an off-axis region. The image-side surface of the sixth lens element E6 has two critical points in an off-axis region.

[0212] 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. The seventh lens element E7 is made of plastic material and both its object-side and image-side surfaces are aspherical. The object-side surface of the seventh lens element E7 has four 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 three critical points in an off-axis region. The image-side surface of the seventh lens element E7 has one critical point in an off-axis region.

[0213] The E8 filter is made of glass and is positioned between the seventh lens element E7 and the image surface IMG. It does not affect the focal length of the optical image acquisition system. The IS image sensor is located on or near the image surface IMG of the optical image acquisition system.

[0214] The detailed optical data of the 11th embodiment are listed in Table 11A and the aspherical surface data are listed in Table 11B below. TABLE 11A 11. Design f = 7.34 mm, Fno = 1.80, HFOV = 43.0 degrees Surface # radius of curvature thickness material index Abbe # Focal length 0 object infinity infinity 1 Lens 1 28,9113 (ASP) 0,905 plastic 1,562 44,6 6,96 2 -4,4734 (ASP) -0,283 3 Ape. - Aperture Plano 0,333 4 Lens 2 -5,7863 (ASP) 1,306 plastic 1,535 55,9 -97,7 5 -7,0189 (ASP) 0,050 6 Lens 3 8,4169 (ASP) 0,762 plastic 1,639 23,5 -13,07 7 4,0435 (ASP) 0,590 8 Aperture Plano 0,165 9 Lens 4 27,3767 (ASP) 1,961 plastic 1,544 56,0 9,61 10 -6,3030 (ASP) 0,833 11 Lens 5 -1,8857 (ASP) 0,626 plastic 1,615 25,3 -8,65 12 -3,2901 (ASP) 0,050 13 Lens 6 7,6906 (ASP) 1,368 plastic 1,544 56,0 6,83 14 -6,7318 (ASP) 0,050 15 Lens 7 3,4588 (ASP) 1,329 plastic 1,562 44,6 -11,57 16 1,9457 (ASP) 1,500 17 filter Plano 0,210 Glass 1,517 64,2 - 18 Plano 0,614 19 Picture Plano - Note: Reference wavelength is 587.6 nm (d-line). An effective radius of aperture S1 (surface 8) is 2.814 mm. TABLE 11B Aspheric coefficients Surface # 1 2 4 5 k = 0,00000E+00 0,00000E+00 -1,48193E+01 -3,30094E+00 A4 = -5,50192E-03 1,56010E-02 9,68946E-03 -3,27856E-03 A6 = -1,89765E-04 -2,38513E-03 -1,33261E-03 -9,48354E-04 A8 = 8,15745E-05 2,52983E-04 -7,82626E-06 9,53192E-05 A10 = - - 5,68896E-07 -9,10082E-06 Surface # 6 7 9 10 k = 6,67133E+00 -3,71499E+00 -5,09665E+01 -2,01945E+00 A4 = -9,75061E-03 -3,15575E-03 -1,15612E-03 -5,34743E-03 A6 = -3,02998E-04 5,95398E-06 1,34198E-04 -7,80354E-05 A8 = 5,80324E-05 1,69751E-05 -6,38653E-05 9,40862E-05 A10 = -4,24184E-06 -2,66799E-06 2,71757E-06 -9,98012E-06 A12 = - - - 3,36874E-07 Surface # 11 12 13 14 k = -7,50000E-01 -6,56575E-01 9,28176E-01 -9,92886E+00 A4 = 1,86717E-02 -5,99789E-04 4,35833E-03 2,55668E-02 A6 = -1,40543E-03 4,91898E-04 -7,65590E-04 -3,12584E-03 A8 = 3,65456E-04 3,20551E-05 2,36057E-05 1,85488E-04 A10 = -3,03304E-05 -2,55251E-06 -2,25860E-07 -5,52633E-06 A12 = 9,39023E-07 2,51322E-08 -1,35628E-09 6,38621E-08 Surface # 15 16 k = -3,32363E+00 -3,43320E+00 A4 = -9,47274E-03 -4,95229E-03 A6 = 4,21576E-04 1,56595E-04 A8 = -2,63913E-05 5,53656E-06 A10 = 3,74723E-06 -6,60467E-07 A12 = -2,37069E-07 2,34175E-08 A14 = 6,23717E-09 -3,86237E-10 A16 = -5,85086E-11 2,48493E-12

[0215] In the 11th 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 the parameters listed in Table 11C are also the same as those in the 1st embodiment, with the corresponding values ​​for the 11th embodiment, so no further explanation is given here.

[0216] Furthermore, these parameters from Table 11A and Table 11B can be calculated as the following values ​​and satisfy the following conditions: TABLE 11C Schematic parameters f [mm] 7,34 |f6 / f7| 0,59 Fno 1,80 |f / R9|+|f / R10| 6,12 HFOV [Grade] 43,0 R6 / R7 0,15 FOV [degrees] 86,0 R10 / R11 -0,43 TL / lmgH 1,75 (R3-R4) / (R3+R4) -0,10 TL / f 1,68 ΣCT / ΣAT 4,62 SL / f 1,60 CT6 / CT2 1,05 TL / R1 0,43 (T12+T23+T56+T67) / (T34+T45) 0,13 TL / R3 -2,14 T34 / T45 0,91 tan(HFOV) 0,93 T67 / T45 0,06 f / f1+f / f2 0,98 V4 56,0 |f4 / f7| 0,83 Y7R2 / Y2R1 3,09 |f5 / f6| 1,27 - - 12. Design

[0217] Fig. Figure 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 embodiment 12. Fig.23 The image acquisition unit 12 comprises the optical image acquisition system (whose reference numeral is omitted) of the present disclosure and an image sensor IS. The optical image acquisition system comprises, in order from an object side to an image side along an optical axis, a first lens element E1, an aperture diaphragm ST, a second lens element E2, a third lens element E3, an aperture S1, 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 optical image acquisition system comprises seven lens elements (E1, E2, E3, E4, E5, E6, and E7), with no additional lens element arranged between any of the adjacent seven lens elements.

[0218] The first lens element E1 with positive 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. The first lens element E1 is made of plastic material and both the object-side and image-side surfaces are aspherical.

[0219] The second lens element E2, with positive refractive power, has an object-side surface that is convex in a paraxial region and an image-side surface that is also convex in a paraxial region. The second lens element E2 is made of plastic material and both its object-side and image-side surfaces are aspherical. The object-side surface of the second lens element E2 has an inflection point.

[0220] The third lens element E3, 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. The third lens element E3 is made of plastic material and both its object-side and image-side surfaces are aspherical. The object-side surface of the third lens element E3 has an inflection point. The image-side surface of the third lens element E3 has an inflection point. The object-side surface of the third lens element E3 has a critical point in an off-axis region.

[0221] The fourth lens element E4, with positive refractive power, has an object-side surface that is convex in a paraxial region and an image-side surface that is also convex in a paraxial region. The fourth lens element E4 is made of plastic material and both its object-side and image-side surfaces are aspherical. The object-side surface of the fourth lens element E4 has an inflection point. The object-side surface of the fourth lens element E4 has a critical point in an off-axis region.

[0222] The fifth lens element E5, with negative refractive power, has an object-side surface that is concave in a paraxial region and an image-side surface that is convex in a paraxial region. The fifth lens element E5 is made of plastic material and both its object-side and image-side surfaces are aspherical. The object-side surface of the fifth lens element E5 has two inflection points. The image-side surface of the fifth lens element E5 has one inflection point. The image-side surface of the fifth lens element E5 has a critical point in an off-axis region.

[0223] The sixth lens element E6, with positive refractive power, has an object-side surface that is convex in a paraxial region and an image-side surface that is also convex in a paraxial region. The sixth lens element E6 is made of plastic material and both its object-side and image-side surfaces are aspherical. The object-side surface of the sixth lens element E6 has two inflection points. 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 one critical point in an off-axis region. The image-side surface of the sixth lens element E6 has two critical points in an off-axis region.

[0224] 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. The seventh lens element E7 is made of plastic material and both its object-side and image-side surfaces are aspherical. The object-side surface of the seventh lens element E7 has four 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 three critical points in an off-axis region. The image-side surface of the seventh lens element E7 has one critical point in an off-axis region.

[0225] 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 optical image acquisition system. The IS image sensor is located on or near the image surface IMG of the optical image acquisition system.

[0226] The detailed optical data of the 12th embodiment are listed in Table 12A and the aspherical surface data in Table 12B below. TABLE 12A 12. Design f = 6.95 mm, Fno = 1.80, HFOV = 45.0 degrees Surface # radius of curvature thickness material index Abbe # Focal length 0 object infinity infinity 1 Lens 1 34,7289 (ASP) 0,676 plastic 1,650 21,8 120,9 2 61,7284 (ASP) 0,135 3 Ape.-Blender Plano 0,090 4 Lens 2 14,0790 (ASP) 1,754 plastic 1,551 44,8 8,31 5 -6,4787 (ASP) 0,061 6 Lens 3 9,0180 (ASP) 0,720 plastic 1,642 22,5 -13,75 7 4,3211 (ASP) 0,546 8 Aperture Plano 0,152 9 Lens 4 24,1499 (ASP) 1,827 plastic 1,544 56,0 10,28 10 -7,0855 (ASP) 0,678 11 Lens 5 -1,8609 (ASP) 0,600 plastic 1,642 22,5 -8,70 12 -3,1437 (ASP) 0,050 13 Lens 6 7,1103 (ASP) 1,335 plastic 1,544 56,0 5,88 14 -5,4385 (ASP) 0,050 15 Lens 7 3,0681 (ASP) 1,150 plastic 1,551 44,8 -9,44 16 1,6725 (ASP) 1,500 17 filter Plano 0,210 Glass 1,517 64,2 - 18 Plano 0,713 19 Picture Plano - Note: Reference wavelength is 587.6 nm (d-line). An effective radius of aperture S1 (surface 8) is 2.817 mm. TABLE 12B Aspheric coefficients Surface # 1 2 4 5 k = 0,00000E+00 0,00000E+00 -9,00000E+01 -2,00678E+00 A4 = -6,09748E-04 1,41397E-03 3,19200E-03 -2,95292E-03 A6 = 2,89824E-04 2,54517E-04 -1,30193E-03 -1,13766E-03 A8 = -4,57585E-07 4,83978E-05 1,85045E-04 1,35293E-04 A10 = - - -2,90953E-05 -1,60509E-05 Surface # 6 7 9 10 k = 8,82826E+00 -4,01605E+00 -6,26490E+01 -2,40208E-01 A4 = -9,77769E-03 -4,44538E-03 -2,11485E-03 -6,34894E-03 A6 = 2,27875E-04 6,61858E-04 2,99067E-04 1,97692E-04 A8 = -6,60987E-05 -8,81706E-05 -7,54614E-05 1,50555E-05 A10 = 1,17630E-06 2,68580E-06 4,12931E-06 3,86720E-07 A12 = - - - -1,10935E-07 Surface # 11 12 13 14 k = -7,48977E-01 -7,16293E-01 3,92532E-01 -1,31784E+01 A4 = 1,91972E-02 -5,00675E-04 4,73230E-03 2,74937E-02 A6 = -1,70871E-03 2,29042E-04 -7,30424E-04 -3,30679E-03 A8 = 4,13215E-04 9,92369E-05 1,37152E-05 1,90811E-04 A10 = -3,18254E-05 -8,63533E-06 1,57172E-07 -5,54063E-06 A12 = 8,89006E-07 2,26095E-07 -2,85367E-09 6,25708E-08 Surface # 15 16 k = -3,49373E+00 -3,18555E+00 A4 = -8,90319E-03 -5,58946E-03 A6 = 2,26039E-04 1,96829E-04 A8 = -1,18760E-06 4,98830E-06 A10 = 2,12060E-06 -7,34308E-07 A12 = -1,81523E-07 2,78324E-08 A14 = 5,27375E-09 -4,81897E-10 A16 = -5,18091E-11 3,22918E-12

[0227] In the 12th 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 the parameters listed in Table 12C are also the same as those in the 1st embodiment, with corresponding values ​​for the 12th embodiment, so no further explanation is given here.

[0228] Furthermore, these parameters from Table 12A and Table 12B can be calculated as the following values ​​and satisfy the following conditions: TABLE 12C Schematic parameters f [mm] 6,95 |f6 / f7| 0,62 Fno 1,80 |f / R9|+|f / R10| 5,95 HFOV [Grade] 45,0 R6 / R7 0,18 FOV [degrees] 90,0 R10 / R11 -0,44 TL / lmgH 1,74 (R3-R4) / (R3+R4) 2,70 TL / f 1,76 ΣCT / ΣAT 4,58 SL / f 1,65 CT6 / CT2 0,76 TL / R1 0,35 (T12+T23+T56+T67) / (T34+T45) 0,28 TL / R3 0,87 T34 / T45 1,03 tan(HFOV) 1,00 T67 / T45 0,07 f / f1+f / f2 0,89 V4 56,0 |f4 / f7| 1,09 Y7R2 / Y2R1 3,18 |f5 / f6| 1,48 - - 13. Design

[0229] Fig.Figure 25 is a perspective view of an image acquisition unit according to the 13th embodiment of the present disclosure. In this embodiment, an image acquisition unit 100 is a camera module comprising a lens unit 101, a drive device 102, an image sensor 103, and an image stabilizer 104. The lens unit 101 comprises the optical image acquisition system disclosed in the 1st embodiment, a tube, and a holder (whose reference numerals have been omitted) for holding the optical image acquisition system. However, the lens unit 101 can alternatively be provided with the optical image acquisition system disclosed in other embodiments of the present disclosure, and the present disclosure is not limited thereto.The imaging light is focused in the lens unit 101 of the image acquisition unit 100 to generate an image with the drive device 102, which is used for image focusing on the image sensor 103, and the generated image is then digitally transmitted to other electronic components for further processing.

[0230] The drive unit 102 can have an autofocus function, and different drive configurations can be achieved by using voice coil motors (VCMs), microelectromechanical systems (MEMS), piezoelectric systems, or shape memory alloys. The drive unit 102 is advantageous for achieving better image positioning of the lens unit 101, enabling a clear image of the imaged object to be captured by the lens unit 101 at varying object distances. The image sensor 103 (e.g., CCD or CMOS), which can be characterized by high light sensitivity and low noise, is positioned on the image surface of the optical image acquisition system to achieve higher image quality.

[0231] The image stabilizer 104, for example an accelerometer, a gyroscope, and a Hall-effect sensor, is designed to work in conjunction with the drive unit 102 to achieve optical image stabilization (OIS). The drive unit 102, working in conjunction with the image stabilizer 104, is advantageous for compensating for panning and tilting movements of the lens unit 101, thereby reducing motion blur during exposure. In some cases, this compensation can be achieved through electronic image stabilization (EIS) using image processing software, which improves image quality in motion or low-light conditions. 14. Design

[0232] Fig. Figure 26 is a perspective view of an electronic device according to the 14th embodiment of the present disclosure. Fig.Figure 27 is another perspective view of the electronic device in Fig. 26.

[0233] In this embodiment, an electronic device 200 is a smartphone comprising the image acquisition unit 100, an image acquisition unit 100a, an image acquisition unit 100b, an image acquisition unit 100c, and a display unit 201 disclosed in the 13th embodiment. As in Fig. As shown in Figure 26, the image acquisition unit 100, the image acquisition unit 100a, and the image acquisition unit 100b are arranged on the same side of the electronic device 200 and point in the same direction, and each of the image acquisition units 100, 100a, and 100b has a single focal point. As shown in Fig.As shown in Figure 27, the image acquisition unit 100c and the display unit 201 are arranged on the opposite side of the electronic device 200, so that the image acquisition unit 100c can be a forward-facing camera of the electronic device 200 for taking selfies, but the present disclosure is not limited to this. Furthermore, each of the image acquisition units 100a, 100b, and 100c can comprise the optical image acquisition system of the present disclosure and have a similar configuration to the image acquisition unit 100. In particular, each of the image acquisition units 100a, 100b, and 100c can comprise a lens unit, a drive device, an image sensor, and an image stabilizer, and each of the lens units can comprise an optical image acquisition system, such as the optical image acquisition system of the present disclosure, a tube, and a holding element for holding the optical image acquisition system.

[0234] Image capture unit 100 is a wide-angle image capture unit, image capture unit 100a is a telephoto image capture unit, image capture unit 100b is an ultra-wide-angle image capture unit, and image capture unit 100c is a wide-angle image capture unit. In this embodiment, image capture units 100, 100a, and 100b have different fields of view, allowing the electronic device to have 200 different magnification ratios to meet the requirements of the optical zoom function. Furthermore, image capture unit 100c, as shown in Fig.As shown in Figure 27, the image acquisition unit 100c has a non-circular opening, and the tube or lens elements in the image acquisition unit 100c may have one or more clipped edges at the outer diameter positions thereof to conform to the non-circular opening. Therefore, in order to further reduce the length of the image acquisition unit 100c along a single axis, and thereby decrease the overall size of the lens, it is advantageous to increase the area ratio of the display unit 201 to the electronic device 200, to decrease the thickness of the electronic device 200, and to achieve compactness of the entire module. In this embodiment, the electronic device 200 comprises several image acquisition units 100, 100a, 100b, and 100c, but the present disclosure is not limited to the number and arrangement of the image acquisition units. 15. Design

[0235] Fig.Figure 28 is a perspective view of an electronic device according to the 15th embodiment of the present disclosure. Fig. Figure 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.

[0236] In this embodiment, an electronic device 300 is a smartphone comprising the image acquisition unit 100, an image acquisition unit 100d, an image acquisition unit 100e, an image acquisition unit 100f, an image acquisition unit 100g, a flash module 301, a focusing aid module 302, an image signal processor 303, a display module 304, and an image software processor 305, as disclosed in the 13th embodiment. The image acquisition unit 100 and the image acquisition unit 100d are arranged on the same side of the electronic device 300. The focusing aid module 302 can be a laser distance meter or a ToF (Time of Flight) module, but the present disclosure is not limited to this.The image acquisition unit 100e, the image acquisition unit 100f, the image acquisition unit 100g, and the display module 304 are arranged on the opposite side of the electronic device 300, and the display module 304 can be a user interface, so that the image acquisition units 100e, 100f, and 100g can be front cameras of the electronic device 300 for taking selfies, but the present disclosure is not limited to this. Furthermore, each of the image acquisition units 100d, 100e, 100f, and 100g can include the optical image acquisition system of the present disclosure and have a similar configuration to the image acquisition unit 100.Specifically, each of the image acquisition units 100d, 100e, 100f and 100g can comprise a lens unit, a drive device, an image sensor and an image stabilizer, and each of the lens units can comprise an optical image acquisition system, such as the optical image acquisition system of the present disclosure, a tube and a holding element for holding the optical image acquisition system.

[0237] Image acquisition unit 100 is a wide-angle image acquisition unit, image acquisition unit 100d is an ultra-wide-angle image acquisition unit, image acquisition unit 100e is a wide-angle image acquisition unit, image acquisition unit 100f is an ultra-wide-angle image acquisition unit, and image acquisition unit 100g is a time-of-flight (ToF) image acquisition unit. In this embodiment, image acquisition units 100 and 100d have different fields of view, so that the electronic device 300 can have different magnification ratios to meet the requirements of the optical zoom function. In addition, image acquisition unit 100g can determine depth information of the imaged object. In this embodiment, the electronic device 300 comprises multiple image acquisition units 100, 100d, 100e, 100f, and 100g, but the present disclosure is not limited to the number and arrangement of the image acquisition units.

[0238] When a user takes pictures of an object 306, the light beams are focused in the image acquisition unit 100 or the image acquisition unit 100d to produce images, and the flash module 301 is activated for light support. The focus assist module 302 detects the distance of the imaged object 306 to achieve fast autofocus. The image signal processor 303 is designed 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 acquisition unit 100e, 100f, or 100g to produce images. The display module 304 can include a touchscreen, and the user can interact with the display module 304 and the multi-functional image software processor 305 to capture images and perform image processing.Alternatively, the user can take pictures using a physical button. The image processed by the 305 image software processor can be displayed on the 304 display module. 16. Design

[0239] Fig. Figure 31 is a perspective view of an electronic device according to the 16th embodiment of the present disclosure.

[0240] In this embodiment, an electronic device 400 is a smartphone comprising the image acquisition unit 100, an image acquisition unit 100h, an image acquisition unit 100i, a flash module 401, a focusing aid module, an image signal processor, a display module, and an image software processor (not shown) disclosed in the 13th embodiment. The image acquisition unit 100, the image acquisition unit 100h, and the image acquisition 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 acquisition units 100h and 100i can comprise the optical image acquisition system of the present disclosure and have a similar configuration to the image acquisition unit 100, the details of which are not repeated here.

[0241] The image acquisition unit 100 is a wide-angle image acquisition unit, the image acquisition unit 100h is a telephoto image acquisition unit, and the image acquisition unit 100i is an ultra-wide-angle image acquisition unit. In this embodiment, the image acquisition units 100, 100h, and 100i have different fields of view, so that the electronic device 400 can have different magnification ratios to meet the requirements of the optical zoom function. Furthermore, the image acquisition unit 100h is a telephoto image acquisition unit with a light deflection element configuration, so that the overall length of the image acquisition unit 100h is not limited by the thickness of the electronic device 400. In addition, the light deflection element configuration of the image acquisition unit 100h can, for example, be one of the ones described in Fig. 36 to Fig. The structures shown in section 38 may be similar, for which reference is made to the preceding descriptions. Fig. 36 to Fig.Reference can be made to Section 38, and the details relating thereto are not repeated. In this embodiment, the electronic device 400 comprises several image acquisition units 100, 100h, and 100i, but the present disclosure is not limited to the number and arrangement of the image acquisition units. When a user takes pictures of an object, light beams are focused in the image acquisition unit 100, 100h, or 100i to produce images, and the flash module 401 is activated to assist the lighting. Furthermore, the subsequent processes are carried out in a similar manner to those in the embodiment described above, so the details relating thereto are not repeated. 17. Design

[0242] Fig. Figure 32 is a perspective view of an electronic device according to the 17th embodiment of the present disclosure.

[0243] In this embodiment, an electronic device 500 is a smartphone comprising the image acquisition unit 100, an image acquisition unit 100j, an image acquisition unit 100k, an image acquisition unit 100m, an image acquisition unit 100n, an image acquisition unit 100p, an image acquisition unit 100q, an image acquisition unit 100r, an image acquisition unit 100s, a flash module 501, a focusing aid module, an image signal processor, a display module and an image software processor (not shown) disclosed in the 13th embodiment. The image acquisition 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 can comprise the optical image acquisition system of the present disclosure and have a similar configuration to the image acquisition unit 100, without the details relating thereto being specified again.

[0244] The image acquisition unit 100 is a wide-angle image acquisition unit, the image acquisition unit 100j is a telephoto image acquisition unit, the image acquisition unit 100k is a telephoto image acquisition unit, the image acquisition unit 100m is a wide-angle image acquisition unit, the image acquisition unit 100n is an ultra-wide-angle image acquisition unit, the image acquisition unit 100p is an ultra-wide-angle image acquisition unit, the image acquisition unit 100q is a telephoto image acquisition unit, the image acquisition unit 100r is a telephoto image acquisition unit, and the image acquisition unit 100s is a ToF image acquisition unit. In this embodiment, the image acquisition units 100, 100j, 100k, 100m, 100n, 100p, 100q and 100r have different fields of view, so that the electronic device can have 500 different magnification ratios to meet the requirements of the optical zoom function.Furthermore, each of the 100j and 100k image acquisition units can be a telephoto image acquisition unit with a light deflection element configuration. Moreover, the light deflection element configuration of each of the 100j and 100k image acquisition units can, for example, be one of those described in [reference missing]. Fig. 36 to Fig. The structures shown in section 38 may be similar, for which reference is made to the preceding descriptions. Fig. 36 to Fig.Reference can be made to reference 38, and the relevant details are not stated again here. Furthermore, the image acquisition unit 100s can determine depth information of the imaged object. In this embodiment, the electronic device 500 comprises multiple image acquisition 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 acquisition units. When a user takes pictures of an object, the light rays are focused in the image acquisition unit 100, 100j, 100k, 100m, 100n, 100p, 100q, 100r, or 100s to produce images, and the flash module 501 is activated to assist the lighting. Furthermore, the subsequent processes are carried out in a similar manner to those in the embodiments mentioned above, and the details thereof are not specified again. 18. Design

[0245] Fig.Figure 33 is a schematic view of an electronic device according to the 18th embodiment of the present disclosure.

[0246] In this embodiment, an electronic device 600 can be a small-format camera, for example, an action camera. The electronic device 600 comprises a display unit 601 and an image acquisition unit 602. The image acquisition unit 602 is electrically connected to the display unit 601. The image acquisition unit 602 comprises the optical image acquisition system disclosed in the first embodiment. The image acquisition unit 602 can be a wide-angle image acquisition unit. The image acquisition unit 602, which is similar to the image acquisition unit 100, can further comprise a tube, a holding element, or a combination thereof. The electronic device 600 captures an image with the image acquisition unit 602. Preferably, the electronic device can further comprise a control unit, a display unit, a storage unit, a random-access memory (RAM) unit, or a combination thereof.

[0247] The smartphone in its various embodiments serves only as an example to illustrate the image acquisition unit installed in an electronic device according to the present disclosure, and the present disclosure is not limited to it. The image acquisition unit can optionally be applied to optical systems with a moving focus. Furthermore, the optical image acquisition system of the image acquisition unit is characterized by good aberration correction capability and high image quality and can be used for 3D image acquisition applications (3D for three-dimensional) in products such as digital cameras, mobile devices, digital tablets, smart televisions, network surveillance devices, dashboard cameras, vehicle reversing cameras, multi-camera devices, image recognition systems, motion sensor input devices, portable devices, and other electronic imaging devices.

[0248] The foregoing description has been provided for illustrative purposes with reference to specific embodiments. It should be noted that TABLES 1A-12C show different data for the various embodiments; however, the data for the different embodiments were obtained experimentally. The embodiments were selected and described to best illustrate the principles of the disclosure and their practical applications, so that other skilled persons may make the best possible use of the disclosure and of the various embodiments with different modifications suitable for their respective intended uses. The embodiments shown above and the accompanying drawings are exemplary and are not intended to be exhaustive, nor to limit the scope of the present disclosure to the forms exactly disclosed. In view of the above teachings, many modifications and variations are possible.

Claims

[1] Optical image acquisition system comprising seven lens elements (E1, E2, E3, E4, E5, E6, E7), wherein the seven lens elements (E1, E2, E3, E4, E5, E6, E7) are arranged in sequence from an object side to an image side along a ray path as 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), and each of the seven lens elements (E1, E2, E3, E4, E5, E6, E7) has an object-side surface facing the object side and an image-side surface facing the image side; wherein the third lens element (E3) has a negative refractive power, the object-side surface of the fifth lens element (E5) is concave in a paraxial region thereof, the sixth lens element (E6) has a positive refractive power, the seventh lens element (E7) has a negative refractive power, the object-side surface of the seventh lens element (E7) is convex in a paraxial region thereof, and the image-side surface of the seventh lens element (E7) is concave in a paraxial region thereof and has at least one inflection point (P); where TL is an axial distance between the object-side surface of the first lens element (E1) and an image surface (IMG), R1 is a radius of curvature of the object-side surface of the first lens element (E1), R3 is a radius of curvature of the object-side surface of the second lens element (E2), T12 is an axial distance between the first lens element (E1) and the second lens element (E2), T23 is an axial distance between the second lens element (E2) and the third lens element (E3), T34 is an axial distance between the third lens element (E3) and the fourth lens element (E4), T45 is an axial distance between the fourth lens element (E4) and the fifth lens element (E5), T56 is an axial distance between the fifth lens element (E5) and the sixth lens element (E6), and T56 is an axial distance between the sixth lens element (E6) and the seventh lens element (E7). T67 is, and the following conditions are met: -2.50 <TL / R1<1,00; -2.50 <TL / R3<1,70; und 0.00<(T12+T23+T56+T67) / (T34+T45)<0.

70. [2] Optical image acquisition system according to claim 1, wherein the fourth lens element (E4) has a positive refractive power and the fifth lens element (E5) has a negative refractive power. [3] Optical image acquisition system according to claim 1, wherein ΣCT is a sum of central thicknesses of all lens elements of the optical image acquisition system, ΣAT is a sum of axial distances between each of all adjacent lens elements of the optical image acquisition system and the following condition is satisfied: 3.00<ΣCT / ΣAT<6.

50. [4] Optical image acquisition system according to claim 1, wherein a focal length of the optical image acquisition system is f, a radius of curvature of the object-side surface of the fifth lens element (E5) is R9, a radius of curvature of the image-side surface of the fifth lens element (E5) is R10 and the following condition is met: 4.00<|f / R9|+|f / R10|<8.

00. [5] Optical image acquisition system according to claim 1, wherein a radius of curvature of the image-side surface of the fifth lens element (E5) is R10, a radius of curvature of the object-side surface of the sixth lens element (E6) is R11 and the following condition is met: -0.70 <R10 / R11<0,30. [6] Optical image acquisition system according to claim 1, further comprising an aperture diaphragm (ST), wherein an axial distance between the aperture diaphragm (ST) and the image surface (IMG) SL is, a focal length of the optical image acquisition system f is and the following condition is met: 1.40 <SL / f<2,00. [7] Optical image acquisition system according to claim 1, wherein the axial distance between the fourth lens element (E4) and the fifth lens element (E5) is T45, the axial distance between the fifth lens element (E5) and the sixth lens element (E6) is T56, a focal length of the sixth lens element (E6) is f6, a focal length of the seventh lens element (E7) is f7 and the following conditions are met: 0.00 <T67 / T45<0,60; und 0.20<|f6 / f7|<0.

90. [8] Optical image acquisition system according to claim 1, wherein the focal length of the fifth lens element (E5) is f5, the focal length of the sixth lens element (E6) is f6 and the following condition is met: 0.70<|f5 / f6|<1.

80. [9] Image capture unit (100), comprising: the optical image acquisition system according to claim 1; and an image sensor (103) which is arranged on the image surface (IMG) of the optical image acquisition system. [10] Electronic device (200), comprising: the image acquisition unit (100) according to claim 9. [11] Optical image acquisition system comprising seven lens elements (E1, E2, E3, E4, E5, E6, E7), wherein the seven lens elements (E1, E2, E3, E4, E5, E6, E7) are, in order from an object side to an image side along a ray 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), and each of the seven lens elements (E1, E2, E3, E4, E5, E6, E7) has an object-side surface facing the object side and an image-side surface facing the image side; wherein the image-side surface of the second lens element (E2) is convex in a paraxial region thereof, the third lens element (E3) has a negative refractive power, the fifth lens element (E5) has a negative refractive power, the object-side surface of the fifth lens element (E5) is concave in a paraxial region thereof, the image-side surface of the fifth lens element (E5) is convex in a paraxial region thereof, the seventh lens element (E7) has a negative refractive power and the image-side surface of the seventh lens element (E7) has at least one inflection point (P); where TL is an axial distance between the object-side surface of the first lens element (E1) and an image surface (IMG), R1 is a radius of curvature of the object-side surface of the first lens element (E1), R3 is a radius of curvature of the object-side surface of the second lens element (E2), f6 is a focal length of the sixth lens element (E6), f7 is a focal length of the seventh lens element (E7), T45 is an axial distance between the fourth lens element (E4) and the fifth lens element (E5), T67 is an axial distance between the sixth lens element (E6) and the seventh lens element (E7), and the following conditions are met: -2.20 <TL / R1<1,00; -2.50 <TL / R3<2,00; 0.00 < |f6 / f7| < 1.00; and 0.00 <T67 / T45<0,80. [12] Optical image acquisition system according to claim 11, wherein the fourth lens element (E4) has a positive refractive power, the sixth lens element (E6) has a positive refractive power and the image-side surface of the seventh lens element (E7) is concave in a paraxial region thereof and has at least one critical point (C) in an off-axial region thereof; where TL is the axial distance between the object-side surface of the first lens element (E1) and the image surface (IMG), f is a focal length of the optical image acquisition system, HFOV is half of a maximum field of view of the optical image acquisition system, and the following conditions are met: 1.60 <TL / f<2,10; und 0.70 <tan(HFOV)<1,40. [13] Optical image acquisition system according to claim 11, wherein the focal length of the fourth lens element (E4) is f4, the focal length of the seventh lens element (E7) is f7 and the following condition is met: 0.40<|f4 / f7|<1.

40. [14] Optical image acquisition system according to claim 11, wherein the 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 met: −0.50<(R3−R4) / (R3+R4). [15] Optical image acquisition system according to claim 11, wherein the axial distance between the object-side surface of the first lens element (E1) and the image surface (IMG) is TL, the radius of curvature of the object-side surface of the first lens element (E1) is R1, the radius of curvature of the object-side surface of the second lens element (E2) is R3 and the following conditions are met: -2.10 <TL / R1<0,80; und -2.30 <TL / R3<1,90. [16] Optical image acquisition system according to claim 11, wherein a central thickness of the second lens element (E2) is CT2, a central thickness of the sixth lens element (E6) is CT6 and the following condition is met: 0.30 <CT6 / CT2<1,25. [17] Optical image acquisition system according to claim 11, wherein an axial distance between the first lens element (E1) and the second lens element (E2) is T12, an axial distance between the second lens element (E2) and the third lens element (E3) is T23, an axial distance between the third lens element (E3) and the fourth lens element (E4) is T34, the axial distance between the fourth lens element (E4) and the fifth lens element (E5) is T45, an axial distance between the fifth lens element (E5) and the sixth lens element (E6) is T56, the axial distance between the sixth lens element (E6) and the seventh lens element (E7) is T67 and the following condition is satisfied: 0.00<(T12+T23+T56+T67) / (T34+T45)<0.

60. [18] Optical image acquisition system according to claim 11, wherein an Abbe number of the fourth lens element (E4) is V4 and the following condition is met: 35.0 <V4<75,0. [19] Optical image acquisition system comprising seven lens elements (E1, E2, E3, E4, E5, E6, E7), wherein the seven lens elements (E1, E2, E3, E4, E5, E6, E7) are, in order from an object side to an image side along a ray 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), and each of the seven lens elements (E1, E2, E3, E4, E5, E6, E7) has an object-side surface facing the object side and an image-side surface facing the image side; wherein the object-side surface of the first lens element (E1) is concave in a paraxial region thereof, the object-side surface of the second lens element (E2) is concave in a paraxial region thereof, the third lens element (E3) has a negative refractive power, the object-side surface of the fifth lens element (E5) is concave in a paraxial region thereof, the image-side surface of the fifth lens element (E5) is convex in a paraxial region thereof, the sixth lens element (E6) has a positive refractive power, and the image-side surface of the seventh lens element (E7) has at least one inflection point (P); where TL is an axial distance between the object-side surface of the first lens element (E1) and an image surface (IMG), R1 is a radius of curvature of the object-side surface of the first lens element (E1), R3 is a radius of curvature of the object-side surface of the second lens element (E2), and the following conditions are met: TL / R1<0.00; and TL / R3<0.

00. [20] Optical image acquisition system according to claim 19, wherein the fourth lens element (E4) has a positive refractive power, the fifth lens element (E5) has a negative refractive power, the sixth lens element (E6) has a positive refractive power, the seventh lens element (E7) has a negative refractive power and the image-side surface of the seventh lens element (E7) is concave in a paraxial region thereof. [21] Optical image acquisition system according to claim 19, wherein the image-side surface of the first lens element (E1) is convex in a paraxial region thereof, the image-side surface of the second lens element (E2) is convex in a paraxial region thereof, the image-side surface of the third lens element (E3) is concave in a paraxial region thereof, the image-side surface of the fourth lens element (E4) is convex in a paraxial region thereof, and the image-side surface of the sixth lens element (E6) is convex in a paraxial region thereof. [22] Optical image acquisition system according to claim 19, wherein the axial distance between the object-side surface of the first lens element (E1) and the image surface (IMG) is TL, a maximum image height of the optical image acquisition system is ImgH and the following condition is met: 1.50 <TL / lmgH<2,10. [23] Optical image acquisition system according to claim 19, wherein a focal length of the optical image acquisition system is f, a focal length of the first lens element (E1) is f1, a focal length of the second lens element (E2) is f2 and the following condition is met: 0.50 <f / f1+f / f2<3,00. [24] Optical image acquisition system according to claim 19, wherein a radius of curvature of the image-side surface of the third lens element (E3) is R6, a radius of curvature of the object-side surface of the fourth lens element (E4) is R7 and the following condition is met: -0.40 <R6 / R7<0,55. [25] Optical image acquisition system according to claim 19, wherein an axial distance between the third lens element (E3) and the fourth lens element (E4) is T34, an axial distance between the fourth lens element (E4) and the fifth lens element (E5) is T45 and the following condition is met: 0.50 <T34 / T45<1,80. [26] Optical image acquisition system according to claim 19, wherein a maximum effective radius of the object-side surface of the second lens element (E2) is Y2R1, a maximum effective radius of the image-side surface of the seventh lens element (E7) is Y7R2 and the following condition is met: 2.20 <Y7R2 / Y2R1<5,00. [27] Optical image acquisition system according to claim 19, wherein the axial distance between the object-side surface of the first lens element (E1) and the image surface (IMG) is TL, the radius of curvature of the object-side surface of the first lens element (E1) is R1, the radius of curvature of the object-side surface of the second lens element (E2) is R3, a focal length of the sixth lens element (E6) is f6, a focal length of the seventh lens element (E7) is f7, an axial distance between the first lens element (E1) and the second lens element (E2) is T12, an axial distance between the second lens element (E2) and the third lens element (E3) is T23, an axial distance between the third lens element (E3) and the fourth lens element (E4) is T34, an axial distance between the fourth lens element (E4) and the fifth lens element (E5) is T45, a The axial distance between the fifth lens element (E5) and the sixth lens element (E6) T56 is,an axial distance between the sixth lens element (E6) and the seventh lens element (E7) T67 is, and the following conditions are met:, −1.95≤TL / R1≤0.61; −2.14≤TL / R3≤1.58; 0.36≤|f6 / f7|≤0.83; 0.13≤(T12+T23+T56+T67) / (T34+T45)≤0.49; and 0.06≤T67 / T45≤0.42.

Images