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

Abstract

Optical lens system for imaging, comprising seven lens elements (E1, E2, E3, E4, E5, E6 and E7), wherein the seven lens elements (E1, E2, E3, E4, E5, E6 and E7) are arranged in the order 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), wherein each of the seven lens elements (E1, E2, E3, E4, E5, E6 and 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 third lens element (E3) is concave in a paraxial region thereof, the image-side surface of the sixth lens element (E6) is convex in a paraxial region thereof, and the image-side surface of the seventh lens element (E7) has at least one inflection point (P); wherein the optical lens system for imaging further comprises an aperture diaphragm (ST) arranged between the fourth lens element (E4) and the fifth lens element (E5); and where an axial distance between the image-side surface of the seventh lens element (E7) and an image surface (IMG) BL is, a central thickness of the first lens element (E1) CT1 is, a central thickness of the third lens element (E3) CT3 is, a central thickness of the sixth lens element (E6) CT6 is, an f-number of the optical lens system Fno is, the focal length of the first lens element (E1) f1 is, a combined focal length of the fifth lens element (E5) and the sixth lens element (E6) is f56, and the following conditions are satisfied: 0.10 < BL / CT 3 < 1.40 ; 1.30 < Fno < 2.15 ; − 1.10 < f 56 / f 1 < 0 ; and 0.10 < CT 1 / CT 6 < 2.20.

Description

BACKGROUND Subject area

[0001] The present disclosure relates to an optical lens system for imaging, an image acquisition unit and an electronic device, in particular an optical lens system for imaging 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 lens system for imaging 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 object-side surface of the third lens element is concave in a paraxial region. Preferably, the image-side surface of the sixth lens element is convex in a paraxial region. Preferably, the image-side surface of the seventh lens element has at least one inflection point.

[0006] Preferably, the optical lens system for imaging further comprises an aperture diaphragm arranged between the fourth lens element and the fifth lens element.

[0007] If an axial distance between the image-side surface of the seventh lens element and an image surface BL is, a central thickness of the first lens element CT1 is, a central thickness of the third lens element CT3 is, a central thickness of the sixth lens element CT6 is, an f-number of the optical lens system Fno is, a focal length of the first lens element f1 is, and a combined focal length of the fifth and sixth lens elements f56 is, then the following conditions are preferably met: 0.10 <BL / CT3<1,40; 1.30 <Fno<2,15; -1.10 <f56 / f1<0; and 0.10 <CT1 / CT6<2,20.

[0008] According to another aspect of the present disclosure, an optical lens system for imaging 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.

[0009] Preferably, the first lens element has a negative refractive power. Preferably, the object-side surface of the first lens element is convex in a paraxial region. Preferably, the image-side surface of the first lens element is concave in a paraxial region. Preferably, the object-side surface of the third lens element is concave in a paraxial region. Preferably, the object-side surface of the fifth lens element is convex in a paraxial region. Preferably, the image-side surface of the sixth lens element is convex in a paraxial region. Preferably, the image-side surface of the seventh lens element has at least one inflection point.

[0010] Preferably, the optical lens system for imaging further comprises an aperture diaphragm arranged between the fourth lens element and the fifth lens element.

[0011] If an axial distance between the image-side surface of the seventh lens element and an image surface is BL, a central thickness of the third lens element is CT3, an Abbe number of the seventh lens element is V7, and half of a maximum field of view of the optical lens system for imaging is HFOV, then the following conditions are preferably met: 0.15 <BL / CT3<1,20; 5.0 <V7<45,0; and 85.0 degrees <HFOV<110,0 Grad.

[0012] According to another aspect of the present disclosure, an image acquisition unit comprises one of the above-mentioned optical lens systems and an image sensor, wherein the image sensor is arranged on the image surface of the optical lens system for imaging.

[0013] According to another aspect of the present disclosure, an electronic device comprises an image acquisition unit, and the image acquisition unit comprises one of the above-mentioned optical lens systems and an image sensor, wherein the image sensor is arranged on the image surface of the optical lens system for imaging. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] 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 perspective view of an image acquisition unit according to the 11th embodiment of the present disclosure; Fig. Figure 22 is a perspective view of an electronic device according to the 12th embodiment of the present disclosure; Fig. Figure 23 is another perspective view of the electronic device in Fig. 22; Fig. 24 is a block diagram of the electronic device in Fig. 22; Fig. Figure 25 is a schematic view of an electronic device according to the 13th embodiment of the present disclosure; Fig. Figure 26 shows another schematic view of the electronic device in Fig. 25; Fig. Figure 27 is a perspective view of an electronic device according to the 14th embodiment of the present disclosure; Fig.Figure 28 is a perspective view of an electronic device according to the 15th embodiment of the present disclosure; Fig. Figure 29 is a perspective view of an electronic device according to the 16th embodiment of the present disclosure; Fig. 30 is a top view of the electronic device in Fig. 29; Fig. Figure 31 is a perspective view of an electronic device according to the 17th embodiment of the present disclosure; Fig. Figure 32 shows a schematic view of inflection points and critical points on lens surfaces according to the first embodiment of the present disclosure; and Fig. Figure 33 shows a schematic view of Y1R1, Y3R2, ET5, ET7 and SAG7R1 according to the 1st embodiment of the present disclosure. DETAILED DESCRIPTION

[0015] An optical lens system for imaging comprises seven lens elements. These seven lens elements, in order from an object side to an image side along a ray path, are 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 of the optical lens system for imaging has an object-side surface facing the object side and an image-side surface facing the image side.

[0016] The first lens element can have a negative refractive power. This is advantageous for creating a short focal length configuration, as it allows light with a large angle of incidence to enter the optical lens system for imaging, thus expanding the light reception area to cover a wider range of applications. The object-side surface of the first lens element can be convex in a paraxial region. This is advantageous for increasing the field of view and adjusting the refractive power of the first lens element. The image-side surface of the first lens element can be concave in a paraxial region. This is advantageous for controlling the shape of the image-side surface of the first lens element to regulate the wide-angle incident light entering the optical lens system for imaging.

[0017] The second lens element can have a negative refractive power. Therefore, it is advantageous to effectively divide the refractive power of the first lens element, widen the field of view, and compensate for aberrations caused by the first lens element. The image-side surface of the second lens element can be concave in a paraxial region. Therefore, it is advantageous to work in conjunction with the first lens element to guide the light path, thereby receiving wide-angle light and correcting aberrations.

[0018] The object-side surface of the third lens element can be concave in a paraxial region. This is advantageous for compensating the angle of incidence of wide-angle light entering the third lens element and thus preventing light dispersion.

[0019] The image-side surface of the fourth lens element can be convex in a paraxial region. Therefore, it is advantageous for controlling the size of the peripheral light rays and thus reducing vignetting at the image edge.

[0020] The object-side surface of the fifth lens element can be convex in a paraxial region. Therefore, it is advantageous for focusing the light, thus shortening the overall length of the optical lens system for imaging.

[0021] The image-side surface of the sixth lens element can be convex in a paraxial region. Therefore, it is advantageous for focusing the light, effectively shortening the rear focal length and aiding in the correction of aberrations in the central field of view.

[0022] The object-side surface of the second lens element can have at least one inflection point. Therefore, it is advantageous to adapt the shape of the peripheral surface of the second lens element to facilitate light reception and aberration correction. The image-side surface of the seventh lens element can have at least one inflection point. Therefore, it is advantageous to improve the ability of the seventh lens element to correct peripheral image aberrations. See Fig. Figure 32 shows a schematic view of the inflection points P on the lens surfaces according to the first embodiment of the present disclosure. Fig.32 The image-side surface of the second lens element E2, the image-side surface of the third lens element E3, the image-side surface of the fifth lens element E5, the object-side surface and the image-side surface of the sixth lens element E6, and the image-side surface of the seventh lens element E7 each have one inflection point P, and the object-side surface of the second lens element E2 has five inflection points P. The in Fig. The first embodiment of the present disclosure shown in Figure 32 is only exemplary. Each of the lens surfaces of the lens elements in different embodiments of the present disclosure may have one or more inflection points.

[0023] The image-side surface of the seventh lens element can have at least one critical point in an off-axis region. Therefore, it is advantageous for adjusting the angle of incidence of light onto the image surface and for improving the focusing quality of light rays from different fields of view onto the image surface. See Fig. Figure 32 shows a schematic view of the critical points C on the lens surfaces according to the first embodiment of the present disclosure. Fig. 32 The object-side surface of the second lens element E2, the image-side surface of the third lens element E3, and the image-side surface of the seventh lens element E7 each exhibit a critical point C in an off-axis region thereof. The in Fig.The first embodiment of the present disclosure shown in Figure 32 is only an example. Each of the lens surfaces of the lens elements in different embodiments of the present disclosure may have one or more critical points in an off-axis region thereof.

[0024] According to the present disclosure, the optical lens system for imaging can further comprise an aperture diaphragm arranged between the fourth and fifth lens elements. Therefore, it is advantageous for the optical lens system for imaging to achieve a balance between a wide field of view and a large aperture, thereby enabling a broader range of applications.

[0025] The first lens element can be made of glass. This is advantageous for effectively improving resistance to temperature fluctuations, reducing sensitivity to environmental factors, and significantly enhancing the robustness of the optical lens system for imaging.

[0026] The fifth and sixth lens elements can be cemented together to form a cemented lens set. This is advantageous for reducing the refractive index difference between the lens elements, minimizing reflections due to refraction, and preventing phenomena such as ghosting. The image-side surface of the fifth lens element and the object-side surface of the sixth lens element can be either aspherical or cemented surfaces. This is advantageous for achieving better aberration compensation for the cemented lens set and improving the complementary performance of the two lens elements. If the central thickness of a positive lens element in the cemented lens set is CTp and the central thickness of a negative lens element in the cemented lens set is CTn, the following condition can be satisfied: 0.80 < CTp / CTn < 4.20.Therefore, it is advantageous to balance the ratio of the central thickness between the two cemented lens elements to increase design flexibility and better control the size of the optical lens system for imaging. Furthermore, the following condition can also be met: 1.00 < CTp / CTn < 4.00. The positive lens element refers to a lens element with positive refractive power, and the negative lens element refers to a lens element with negative refractive power.

[0027] If the axial distance between the image-side surface of the seventh lens element and an image surface is BL, and the central thickness of the third lens element is CT3, the following condition can be satisfied: 0.10 < BL / CT3 < 1.40. Therefore, it is advantageous to effectively reduce the back focal length and thus decrease the overall length of the optical lens system for imaging. Furthermore, the following conditions can also be satisfied: 0.15 < BL / CT3 < 1.20. Additionally, the following conditions can also be satisfied: 0.20 < BL / CT3 < 1.10. Furthermore, the following conditions can also be satisfied: 0.25 < BL / CT3 < 0.68. Additionally, the following condition can also be satisfied: 0.30 ≤ BL / CT3 ≤ 0.92.

[0028] If the f-number of the optical lens system used for imaging is Fno, the following condition can be met: 1.30 < Fno < 2.15. Therefore, it is advantageous to achieve a balance between illuminance and depth of field while simultaneously increasing the amount of incident light to improve image quality. Furthermore, the following conditions can also be met: 1.40 < Fno < 2.10. Additionally, the following conditions can also be met: 1.50 < Fno < 2.00. Furthermore, the following condition can also be met: 1.70 ≤ Fno ≤ 2.09.

[0029] If the focal length of the first lens element is f1 and the combined focal length of the fifth and sixth lens elements is f56, the following condition can be satisfied: -1.10 < f56 / f1 < 0. Therefore, it is advantageous to adjust the refractive power configuration of the lens elements to form a wide-angle lens configuration. Furthermore, the following conditions can also be satisfied: -1.00 < f56 / f1 < -0.03. Additionally, the following conditions can also be satisfied: -0.80 < f56 / f1 < -0.08. Furthermore, the following condition can also be satisfied: -0.57 ≤ f56 / f1 ≤ -0.13. In the optical lens system for imaging of the present disclosure, the focal length of a lens element is calculated based on the condition that the medium in front of and behind the lens element is air.

[0030] If the central thickness of the first lens element is CT1 and the central thickness of the sixth lens element is CT6, the following condition can be met: 0.10 < CT1 / CT6 < 2.20. Therefore, it is advantageous to adjust the ratio of the central thickness between the first and sixth lens elements to balance the overall spatial configuration of the optical lens system for imaging. Furthermore, the following conditions can also be met: 0.20 < CT1 / CT6 < 2.10. Furthermore, the following conditions can also be met: 0.25 < CT1 / CT6 < 1.05. Furthermore, the following conditions can also be met: 0.30 < CT1 / CT6 < 1.35. Furthermore, the following condition can also be met: 0.45 ≤ CT1 / CT6 ≤ 1.94.

[0031] If the Abbe number of the seventh lens element is V7, the following condition can be met: 5.0 < V7 < 45.0. Therefore, it is advantageous to restrict the material selection of the seventh lens element to correct chromatic aberrations in the optical lens system for imaging and to prevent image superposition, thereby improving image quality. Furthermore, the following conditions can also be met: 8.0 < V7 < 40.0. Furthermore, the following conditions can also be met: 10.0 < V7 < 35.0. Furthermore, the following conditions can also be met: 12.0 < V7 < 30.0. Furthermore, the following condition can also be met: 14.0 ≤ V7 ≤ 37.4.

[0032] If half of the maximum field of view of the imaging optical lens system is HFOV, the following condition can be met: 85.0 degrees < HFOV < 110.0 degrees. Therefore, it is advantageous for the imaging optical lens system to have a sufficient field of view to meet the requirements of the application equipment. Furthermore, the following condition can also be met: 90 degrees < HFOV < 105 degrees. Additionally, the following condition can also be met: 86.1 degrees ≤ HFOV ≤ 100.9 degrees.

[0033] If the axial distance between the aperture diaphragm and the image-side surface of the fourth lens element is Drsr8, and the axial distance between the aperture diaphragm and the object-side surface of the fifth lens element is Drsr9, the following condition can be satisfied: 0 < |Drsr9| / |Drsr8| < 1.00. Therefore, it is advantageous to adjust the aperture position to increase the relative illuminance of the peripheral field and thus widen the field of view.

[0034] Furthermore, the following condition can also be met: 0 < |Drsr9| / |Drsr8| < 0.90.

[0035] If the axial distance between the fourth and fifth lens elements is T45 and the central thickness of the fifth lens element is CT5, the following condition can be met: 0 < T45 / CT5 < 4.00. Therefore, this is advantageous for controlling the overall path length and supporting lens assembly, thereby improving production efficiency. Furthermore, the following conditions can also be met: 0 < T45 / CT5 < 3.00. Additionally, the following condition can also be met: 0 < T45 / CT5 < 2.50.

[0036] 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 sixth lens element is R12, the following condition can be satisfied: -0.30 < R12 / R3 < 2.80. Therefore, it is advantageous to adjust the radius of curvature of the object-side surface of the second lens element and the image-side surface of the sixth lens element to balance light focusing or scattering, thereby improving the overall imaging performance. Furthermore, the following conditions can also be satisfied: -0.20 < R12 / R3 < 2.30. Additionally, the following condition can also be satisfied: -0.15 < R12 / R3 < 2.00.

[0037] If the axial distance between the first and second lens elements is T12 and the central thickness of the second lens element is CT2, the following condition can be met: 1.50 < T12 / CT2 < 4.50. Therefore, to prevent an excessive distance between the first and second lens elements, it is advantageous to reduce the object-side length of the optical lens system for imaging while maintaining a wide field of view. Furthermore, the following conditions can also be met: 1.60 < T12 / CT2 < 4.00. Additionally, the following condition can also be met: 1.70 < T12 / CT2 < 3.60.

[0038] If the Abbe number of the first lens element is V1, the Abbe number of the second lens element is V2, and the Abbe number of the seventh lens element is V7, the following condition can be satisfied: 0.40 < (V1+V7) / V2 < 1.50. Therefore, it is advantageous to adjust the material configuration of the first, second, and seventh lens elements to effectively balance the focusing ability of light in different wavelength ranges and correct chromatic aberration. Furthermore, the following conditions can also be satisfied: 0.45 < (V1+V7)N2 < 1.40. Additionally, the following condition can also be satisfied: 0.50 < (V1+V7)N2 < 1.35.

[0039] If the central thickness of the sixth lens element is CT6 and the central thickness of the seventh lens element is CT7, the following condition can be met: 0 < CT7 / CT6 < 1.00. Therefore, this is advantageous for maintaining the optimal spatial configuration of the image-side end of the optical lens system for imaging and for reducing manufacturing tolerances. Furthermore, the following conditions can also be met: 0.05 < CT7 / CT6 < 0.80. Additionally, the following condition can also be met: 0.10 < CT7 / CT6 < 0.50.

[0040] If the radius of curvature of the object-side surface of the first lens element is R1 and the radius of curvature of the image-side surface of the fourth lens element is R8, the following condition can be satisfied: -2.50 < R1 / R8 < -0.70. Therefore, it is advantageous for the shape of the object-side surface of the first lens element to match the shape of the image-side surface of the fourth lens element to align the light between the field of view and the aperture diaphragm. Furthermore, the following condition can also be satisfied: -2.00 < R1 / R8 < -0.80.

[0041] If the radius of curvature of the image-side surface of the second lens element is R4 and the radius of curvature of the object-side surface of the fifth lens element is R9, the following condition can be satisfied: 0 < R9 / R4 < 1.80. Therefore, it is advantageous to improve the light focusing quality of the imaged rays, reduce distortion problems, and minimize spherical aberrations. Furthermore, the following condition can also be satisfied: 0.03 < R9 / R4 < 1.60. Additionally, the following condition can also be satisfied: 0.05 < R9 / R4 < 1.50.

[0042] If the maximum effective radius of the object-side surface of the first lens element is Y1R1 and the maximum effective radius of the image-side surface of the third lens element is Y3R2, the following condition can be met: 0.05 < Y3R21Y1R1 < 0.50. Therefore, it is advantageous to increase the angle of view while simultaneously reducing the outer diameter of the subsequent lens elements. Furthermore, the following condition can also be met: 0.10 < Y3R21Y1R1 < 0.40. Additionally, the subsequent lens elements can refer to the lens elements located on the image side of the third lens element. See [reference]. Fig. 33, which shows a schematic view of Y1R1 and Y3R2 according to the 1st embodiment of the present disclosure.

[0043] If the radius of curvature of the image-side surface of the second lens element is R4, 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 satisfied: 0 < |R10+R11| / |R4| < 1.60. Therefore, it is advantageous to compensate for the light deflection at the object-side and image-side ends of the optical lens system for imaging, in order to reduce the focus position differences between different wavelengths. Furthermore, the following condition can also be satisfied: 0.03 < |R10+R11| / |R4| < 1.40. Additionally, the following condition can also be satisfied: 0.05 < |R10+R11| / |R4| < 0.80.

[0044] If the focal length of the fourth lens element is f4 and the combined focal length of the fifth and sixth lens elements is f56, the following condition can be satisfied: 0 < |f56 / f4| < 1.30. Therefore, this is advantageous for effectively balancing the refractive power ratio of the lens elements for aberration correction and harmonizing the beam path. Furthermore, the following condition can also be satisfied: 0.05 < |f56 / f4| < 1.20.

[0045] If the focal length of the optical lens system used for imaging is f and the radius of curvature of the object-side surface of the third lens element is R5, the following condition can be met: -0.40 < f / R5 < 0. Therefore, it is advantageous for correcting aberrations caused by wide-angle incident light, thus improving image quality. Furthermore, the following conditions can also be met: -0.35 < f / R5 < 0. Additionally, the following condition can also be met: -0.30 < f / R5 < -0.01.

[0046] If the radius of curvature of the object-side surface of the third lens element is R5 and the radius of curvature of the image-side surface of the fifth lens element is R10, the following condition can be satisfied: 0 < |R10 / R5| < 0.80. Therefore, it is advantageous for the image-side surface of the fifth lens element to have a more pronounced curve, based on the shape of the object-side surface of the third lens element, in order to reduce the size of the image-side surface of the optical lens system used for imaging. Furthermore, the following condition can also be satisfied: 0.03 < |R10 / R5| < 0.55.

[0047] If the focal length of the second lens element is f2 and the focal length of the seventh lens element is f7, the following condition can be met: -0.40 < f2 / f7 < 1.50. Therefore, it is advantageous to effectively balance the refractive power of the second and seventh lens elements to increase the field of view and reduce the back focal length. Furthermore, the following condition can also be met: 0 < f2 / f7 < 1.30.

[0048] If the axial distance between the first and second lens elements is T12, and the axial distance between the third and fourth lens elements is T34, the following condition can be met: 0 < T34 / T12 < 0.50. Therefore, it is advantageous to position the third and fourth lens elements closer together, thus improving space efficiency. Furthermore, the following conditions can also be met: 0 < T34 / T12 < 0.30. Additionally, the following condition can also be met: 0 < T34 / T12 < 0.20.

[0049] 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 lens system for imaging (which can be half the diagonal length of an effective light-sensitive area of ​​an image sensor) is ImgH, the following condition can be satisfied: 5.50 < TL / ImgH < 7.20. Therefore, it is advantageous to achieve a balance between reducing the overall path length and increasing the image surface area. Furthermore, the following conditions can also be satisfied: 5.60 < TL / ImgH < 7.00. Additionally, the following conditions can also be satisfied: 5.80 < TL / ImgH < 6.90. Furthermore, the following condition can also be satisfied: 6.05 ≤ TL / ImgH ≤ 6.87.

[0050] If a distance parallel to the optical axis exists between a position of the maximum effective radius of the object-side surface of the fifth lens element and a position of the maximum effective radius of the image-side surface of the fifth lens element (ET5), and a distance parallel to the optical axis exists between a position of the maximum effective radius of the object-side surface of the seventh lens element and a position of the maximum effective radius of the image-side surface of the seventh lens element (ET7), the following condition can be satisfied: 0.40 < ET5 / ET7 < 3.50. Therefore, it is advantageous to effectively compensate for the peripheral optical path direction at the image-side end of the optical lens system for imaging and to facilitate integration between the area beyond the effective lens radius and the mechanical components. Furthermore, the following condition can also be satisfied: 1.00 < ET5 / ET7 < 3.30. See [reference]. Fig. 33, which shows a schematic view of ET5 and ET7 according to the 1st embodiment of the present disclosure.

[0051] If a displacement parallel to the optical axis from an axial vertex of the object-side surface of the seventh lens element to the position of the maximum effective radius of the object-side surface of the seventh lens element is SAG7R1, and an axial distance between the sixth and seventh lens elements is T67, the following condition can be satisfied: 0.25 < |SAG7R1| / T67 < 2.50. Therefore, it is advantageous to regulate the curvature of the edge of the object-side surface of the seventh lens element by adjusting the axial distance between the sixth and seventh lens elements, thereby reducing light scattering and the formation of stray light. Furthermore, the following condition can also be satisfied: 0.35 < |SAG7R1| / T67 < 2.40. See [reference]. Fig.Figure 33 shows a schematic view of SAG7R1 according to the first embodiment of the present disclosure. If the direction from the axial vertex of a surface to the position of the maximum effective radius of the same surface is directed towards the image side, the displacement value is positive; if the direction from the axial vertex of the surface to the position of the maximum effective radius of the same surface is directed towards the object side, the displacement value is negative.

[0052] According to the present disclosure, the above-mentioned features and conditions can be used in numerous combinations to achieve corresponding effects.

[0053] According to the present disclosure, the lens elements of the optical lens system for imaging can be made of either glass or plastic material. If the lens elements are made of glass, the refractive power distribution of the optical lens system can be more flexible, and the influence on the 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 material, 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 lens system for imaging. Additionally, the aspherical surfaces can be manufactured by plastic injection molding or glass forming.

[0054] According to the present disclosure, if a lens surface is aspherical, it means that the lens surface has an aspherical shape over its entire optically effective area or part(s) thereof.

[0055] 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 it can optionally filter out light in the wavelength range of 350 nm to 450 nm to reduce interference with the final image caused by excessive blue light and / or near-ultraviolet light. The additive can be homogeneously mixed with a plastic material for use in the production of a lens element from the mixed material by injection molding.Furthermore, the additive can be applied to the lens surface to achieve the effects mentioned above.

[0056] According to the present disclosure, each of an object-side surface and an image-side surface has a paraxial region and an off-axis region. The paraxial region refers to the region of the surface 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 region of the radius of curvature, refractive power or focal point of a lens element is not defined, this means that the section of the radius of curvature, refractive power or focal point of the lens element lies in the paraxial region thereof.

[0057] 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.

[0058] According to the present disclosure, the image surface of the optical lens system for imaging, based on the corresponding image sensor, can be flat or curved, in particular a curved surface that is concave and faces the image-side side of the optical lens system for imaging.

[0059] According to the present disclosure, an image correction unit, such as an image field flattener, can optionally be arranged between the lens element that is closest along the beam path to the image side of the optical lens system used for imaging 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 with spherical, aspherical, diffractive, or Fresnel types), 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.

[0060] According to the present disclosure, the optical lens system for imaging can comprise at least one aperture, for example an aperture diaphragm, a glare diaphragm, or a field diaphragm. The glare diaphragm or field diaphragm can be arranged between an imaged object and the first lens element, between adjacent lens elements, or between the last lens element and the image surface, and serves to eliminate stray light and thereby improve image quality.

[0061] According to the present disclosure, an aperture diaphragm can be configured as a central diaphragm. A central diaphragm arranged between the first lens element and the image surface is advantageous for increasing the viewing angle of the optical lens system for imaging and thereby providing a wider field of view for it.

[0062] According to the present disclosure, the optical lens system for imaging 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.

[0063] According to the present disclosure, the optical lens system for imaging can comprise one or more optical elements to limit the shape of the light passing through the optical lens system for imaging. 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 lens system for imaging, or between two adjacent lens elements, to transmit light in a specific shape and thus meet the application requirements.

[0064] According to the present disclosure, the optical lens system for imaging can comprise at least one optical lens element, an optical element, or a support having at least one surface with a weakly reflective layer. The weakly reflective layer can effectively reduce stray light resulting from light reflection at the interface. The weakly reflective layer can be located in an optically ineffective region of an object-side surface, an image-side surface of the optical lens element, or an interface between the object-side and image-side surfaces. 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, etc.The carrier can be a base for holding a lens assembly, a microlens mounted on an image sensor, a substrate surrounding the image sensor, a glass plate to protect the image sensor, etc.

[0065] According to the present disclosure, the optical lens system for imaging 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 for the light-blocking element to be coordinated with the shape of non-circular lens elements or an aperture diaphragm in order to reduce the size of the optical lens system for imaging and to fully utilize the light passing through the non-circular lens element or the aperture diaphragm, thereby reducing stray light. In addition, the light-blocking element can be provided with a wave-like or serrated structure on the circumference of an inner aperture section.

[0066] 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.

[0067] In accordance with the above description of the present disclosure, the following specific embodiments are provided for further explanation. 1. Design

[0068] 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 lens system for imaging (whose reference numeral is omitted) of the present disclosure and an image sensor IS. The optical lens system for imaging comprises, in the order from an object side to an image side along a beam path, a first lens element E1, a second lens element E2, a third lens element E3, an aperture S1, a fourth lens element E4, an aperture diaphragm ST, 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 lens system for imaging 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.

[0069] The first lens element E1 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 first lens element E1 is made of glass and both its object-side and image-side surfaces are spherical.

[0070] 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 also concave 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 five inflection points. The image-side surface of the second lens element E2 has one inflection point. The object-side surface of the second lens element E2 has a critical point in an off-axis region.

[0071] 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 convex 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. The image-side surface of the third lens element E3 has a critical point in an off-axis region.

[0072] 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 glass and both its object-side and image-side surfaces are aspherical.

[0073] The fifth lens element E5, 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 fifth lens element E5 is made of plastic material and both its object-side and image-side surfaces are aspherical. The image-side surface of the fifth lens element E5 has an inflection point.

[0074] 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 an inflection point. The image-side surface of the sixth lens element E6 also has an inflection point. The object-side surface of the sixth lens element E6 and the image-side surface of the fifth lens element E5 are cemented together.

[0075] The seventh lens element E7, 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 seventh lens element E7 is made of plastic material and both its object-side and image-side surfaces are aspherical. The image-side surface of the seventh lens element E7 has an inflection point. The image-side surface of the seventh lens element E7 has a critical point in an off-axis region.

[0076] The E8 filter is made of glass and is located between the seventh lens element E7 and the image area IMG. It does not affect the focal length of the optical lens system used for imaging. The IS image sensor is located on or near the image area IMG of the optical lens system used for imaging.

[0077] In the first embodiment, the fifth lens element E5 and the sixth lens element E6 are cemented together to form a cemented lens set (whose reference numeral is omitted), and the image-side surface of the fifth lens element E5 and the object-side surface of the sixth lens element E6 are both aspherical surfaces and cemented surfaces that are cemented together.

[0078] 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 an optical axis from an axial vertex on the aspherical surface to a point at a distance Y from the optical axis on the aspherical surface; Y is the vertical distance from the point on the aspherical surface to the optical axis; R is the radius of curvature; k is the conic coefficient; and Ai is the i-th aspherical coefficient, where i can be 4, 6, 8, 10, 12, 14, 16, 18 and 20 in the embodiments, but is not limited to these.

[0079] In the optical lens system for imaging the image acquisition unit 1 according to the 1st embodiment, if a focal length of the optical lens system is f, an aperture number of the optical lens system is Fno, and half of a maximum field of view of the optical lens system is HFOV, these parameters have the following values: f = 0.68 millimeters (mm), Fno = 1.90, and HFOV = 100.9 degrees.

[0080] If the maximum field of view of the optical lens system for imaging is FOV, then the following condition is met: FOV = 201.8 degrees.

[0081] 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 lens system for imaging is ImgH, then the following condition is met: TL / ImgH = 6.20.

[0082] If the focal length of the second lens element E2 is f2 and the focal length of the seventh lens element E7 is f7, then the following condition is met: f2 / f7 = 0.80.

[0083] If the focal length of the first lens element E1 is f1 and the combined focal length of the fifth lens element E5 and the sixth lens element E6 is f56, then the following condition is met: f56 / f1 = -0.35.

[0084] If the focal length of the fourth lens element E4 is f4 and the combined focal length of the fifth lens element E5 and the sixth lens element E6 is f56, then the following condition is satisfied: |f56 / f4| = 0.62.

[0085] If the focal length of the optical lens system for imaging is f and a radius of curvature of the object-side surface of the third lens element E3 is R5, then the following condition is met: f / R5 = -0.12.

[0086] If the radius of curvature of the object-side surface of the first lens element E1 is R1 and the radius of curvature of the image-side surface of the fourth lens element E4 is R8, then the following condition is met: R1 / R8 = -1.31.

[0087] 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 sixth lens element E6 is R12, then the following condition is met: R12 / R3 = 0.70.

[0088] If the radius of curvature of the image-side surface of the second lens element E2 is R4 and the radius of curvature of the object-side surface of the fifth lens element E5 is R9, then the following condition is met: R9 / R4 = 0.41.

[0089] If the radius of curvature of the image-side surface of the second lens element is E2 R4, a radius of curvature of the image-side surface of the fifth lens element is E5 R10, and a radius of curvature of the object-side surface of the sixth lens element is E6 R11, then the following condition is met: |R10+R11| / |R4|=0.28.

[0090] If the radius of curvature of the object-side surface of the third lens element E3 is R5 and the radius of curvature of the image-side surface of the fifth lens element E5 is R10, then the following condition is met: |R10 / R5| = 0.15.

[0091] If the central thickness of the first lens element E1 is CT1 and the central thickness of the sixth lens element E6 is CT6, then the following condition is met: CT1 / CT6 = 0.49.

[0092] If the axial distance between the first lens element E1 and the second lens element E2 is T12 and the central thickness of the second lens element E2 is CT2, then the following condition is met: T12 / CT2 = 2.47. In this embodiment, the 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.

[0093] If the axial distance between the first lens element E1 and the second lens element E2 is T12 and the axial distance between the third lens element E3 and the fourth lens element E4 is T34, then the following condition is met: T34 / T12 = 0.03.

[0094] If the axial distance between the image-side surface of the seventh lens element E7 and the image surface IMG is BL and the central thickness of the third lens element E3 is CT3, then the following condition is met: BL / CT3 = 0.40.

[0095] If the axial distance between the fourth lens element E4 and the fifth lens element E5 is T45 and the central thickness of the fifth lens element E5 is CT5, then the following condition is met: T45 / CT5 = 1.19.

[0096] If the central thickness of the sixth lens element E6 is CT6 and the central thickness of the seventh lens element E7 is CT7, then the following condition is met: CT7 / CT6 = 0.21.

[0097] If the central thickness of a positive lens element in the cemented lens set is CTp and the central thickness of a negative lens element in the cemented lens set is CTn, the following condition is met: CTp / CTn = 1.96. In this embodiment, the positive lens element in the cemented lens set is the sixth lens element E6 and the negative lens element in the cemented lens set is the fifth lens element E5.

[0098] If the axial distance between the aperture diaphragm ST and the image-side surface of the fourth lens element E4 is Drsr8 and the axial distance between the aperture diaphragm ST and the object-side surface of the fifth lens element E5 is Drsr9, then the following condition is satisfied: |Drsr9| / / Drsr8| = 0.02.

[0099] If the Abbe number of the first lens element E1 is V1, the Abbe number of the second lens element E2 is V2, and the Abbe number of the seventh lens element E7 is V7, then the following condition is satisfied: (V1 +V7)N2 = 0.68.

[0100] If the Abbe number of the seventh lens element E7 is V7, then the following condition is satisfied: V7 = 20.3.

[0101] If a distance parallel to the optical axis between a position of the maximum effective radius of the object-side surface of the fifth lens element E5 and a position of the maximum effective radius of the image-side surface of the fifth lens element E5 is ET5, and a distance parallel to the optical axis between a position of the maximum effective radius of the object-side surface of the seventh lens element E7 and a position of the maximum effective radius of the image-side surface of the seventh lens element E7 is ET7, then the following condition is satisfied: ET5 / ET7 = 2.42.

[0102] If the maximum effective radius of the object-side surface of the first lens element is Y1R1 and the maximum effective radius of the image-side surface of the third lens element is Y3R2, then the following condition is met: Y3R2 / Y1 R1 = 0.26.

[0103] If a displacement parallel to the optical axis from an axial vertex of the object-side surface of the seventh lens element E7 to the position of the maximum effective radius of the object-side surface of the seventh lens element E7 is SAG7R1, and an axial distance between the sixth lens element E6 and the seventh lens element E7 is T67, the following condition is satisfied: |SAG7R1| / T67 = 1.63. In this embodiment, the direction of SAG7R1 points towards the object side of the optical lens system for imaging, and the value of SAG7R1 is negative.

[0104] The detailed optical data of the 1st embodiment are shown in Table 1A and the aspherical surface data are shown in Table 1B below. TABLE 1A 1. Design f = 0.68 mm, Fno = 1.90, HFOV = 100.9 degrees Surface# radius of curvature thickness material index Abbe# Focal length 0 object infinity infinity 1 Lens 1 8,8463 (SPH) 0,701 Glass 1,946 17,9 -5,98 2 3,3166 (SPH) 1,479 3 Lens 2 -1,7354 (ASP) 0,600 plastic 1,544 56,0 -2,37 4 5,5964 (ASP) 1,955 5 Lens 3 -5,4660 (ASP) 1,931 plastic 1,614 25,6 -166,40 6 -6,5510 (ASP) 0,154 7 Aperture Plano -0,104 8 Lens 4 6,4796 (ASP) 0,868 Glass 2,001 25,4 3,42 9 -6,7727 (ASP) 0,848 10 Ape.-Blender Plano 0,015 11 Lens 5 2,3204 (ASP) 0,728 plastic 1,705 14,0 -2,23 12 0,8151 (ASP) 0,032 putty 1,485 53,2 - 13 Lens 6 0,7349 (ASP) 1,425 plastic 1,544 56,0 1,13 14 -1,2087 (ASP) 0,219 15 Lens 7 -2,6266 (ASP) 0,297 plastic 1,661 20,3 -2,94 16 7,7999 (ASP) 0,430 17 filter Plano 0,200 Glass 1,517 64,2 - 18 Plano 0,147 19 Picture Plano - Note: Reference wavelength is 587.6 nm (d-line). The effective radius of aperture S1 (surface 7) is 1.361 mm. TABLE 1B Aspheric coefficients Surface # 3 4 5 6 k = -9,90000E+01 4,96248E+00 3,62834E+00 -2,61273E+01 A4 = 2,3452347E-01 5,8922310E-01 -4,6850569E-02 2,0224966E-02 A6 = -1,2643666E-01 -5,0947293E-01 4,1008654E-04 -3,0332950E-02 A8 = 3,5411816E-02 2,2059372E-01 1,6554557E-02 2,5878773E-02 A10 = -5,8218928E-03 -4,8852645E-02 -9,7498918E-03 -1,2843398E-02 A12 = 5,6741891E-04 3,7592715E-03 2,7764025E-03 4,8178973E-03 A14 = -3,0434902E-05 4,8056491E-04 -4,0756242E-04 -1,1721348E-03 A16 = 6,9299074E-07 -8,5736129E-05 2,4677337E-05 1,3932899E-04 Surface # 8 9 11 12 k = 4,76637E-01 9,78232E+00 -8,57236E+00 -7,91891E-01 A4 = 5,2476100E-02 4,3342800E-02 8,9174633E-02 -1,7433300E-01 A6 = -3,8204500E-02 -3,6022000E-02 -9,2662159E-02 1,3727430E+00 A8 = 1,4517700E-02 1,5215300E-02 9,4557797E-02 -3,6599274E+00 A10 = -3,2314300E-03 -3,5752300E-03 -1,3100612E-01 4,7747389E+00 A12 = 3,2080400E-04 3,6492800E-04 1,3101300E-01 -3,3320096E+00 A14 = - - -5,7452960E-02 9,4659299E-01 Surface # 13 14 15 16 k = -1,65595E+00 -2,04962E+00 -1,50582E+01 1,82655E+01 A4 = -6,8931141E-01 9,2380145E-02 -3,6127013E-01 3,0223332E-01 A6 = 4,7942556E+00 4,4130148E-01 2,5191980E+00 -1,3637535E+00 A8 = -1,1855048E+01 -1,6513313E+00 -9,8339702E+00 2,8213794E+00 A10 = 1,5441126E+01 2,5158445E+00 2,4049128E+01 -3,5670586E+00 A12 = -1,0517555E+01 -2,1365138E+00 -3,8310061E+01 2,8661267E+00 A14 = 2,9092320E+00 9,8651373E-01 3,9239445E+01 -1,4713425E+00 A16 = - -1,8592320E-01 -2,4882533E+01 4,6621270E-01 A18 = - - 8,8897699E+00 -8,2722093E-02 A20 = - - -1,3684662E+00 6,2431851E-03

[0105] 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 equation for the aspherical surface profiles. A4–A20 represent the aspherical coefficients of the 4th to 20th order. The tables shown below for each embodiment are the corresponding schematic parameter and aberration curves, and the definitions of the tables are the same as in Table 1A and Table 1B of the first embodiment. Therefore, no further explanation is given in this regard. 2. Design

[0106] 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 comprises the image acquisition unit 2, the optical lens system for imaging (whose reference numeral is omitted) of the present disclosure, and an image sensor IS. The optical lens system for imaging comprises, in the order from an object side to an image side along a beam path, a first lens element E1, a second lens element E2, a third lens element E3, an aperture S1, a fourth lens element E4, an aperture diaphragm ST, a fifth lens element E5, a sixth lens element E6, an aperture S2, a seventh lens element E7, a filter E8, and an image surface IMG. The optical lens system for imaging 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.

[0107] The first lens element E1 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 first lens element E1 is made of glass and both its object-side and image-side surfaces are spherical.

[0108] 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 also concave 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 five inflection points. The image-side surface of the second lens element E2 has one inflection point. The object-side surface of the second lens element E2 has a critical point in an off-axis region.

[0109] The third lens element E3, 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 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. The image-side surface of the third lens element E3 has a critical point in an off-axis region.

[0110] 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 glass and both its object-side and image-side surfaces are aspherical.

[0111] The fifth lens element E5, 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 fifth lens element E5 is made of plastic material and both its object-side and image-side surfaces are aspherical.

[0112] 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 image-side surface of the sixth lens element E6 has an inflection point. The object-side surface of the sixth lens element E6 and the image-side surface of the fifth lens element E5 are cemented together.

[0113] The seventh lens element E7, 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 seventh lens element E7 is made of plastic material and both its object-side and image-side surfaces are aspherical. The image-side surface of the seventh lens element E7 has two inflection points.

[0114] 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 lens system used for imaging. The IS image sensor is located on or near the image surface IMG of the optical lens system used for imaging.

[0115] In the second embodiment, the fifth lens element E5 and the sixth lens element E6 are cemented together to form a cemented lens set (whose reference numeral is omitted), and the image-side surface of the fifth lens element E5 and the object-side surface of the sixth lens element E6 are both aspherical surfaces and cemented surfaces that are cemented together.

[0116] The detailed optical data of the 2nd embodiment are shown in Table 2A and the aspherical surface data are shown in Table 2B below. TABLE 2A 2. Design f = 0.72 mm, Fno = 1.88, HFOV = 99.8 degrees Surface# radius of curvature thickness material index Abbe# Focal length 0 object infinity infinity 1 Lens 1 8,4786 (SPH) 0,687 Glass 2,001 25,4 -6,79 2 3,6191 (SPH) 1,713 3 Lens 2 -2,9932 (ASP) 0,546 plastic 1,544 56,0 -2,74 4 3,1536 (ASP) 2,068 5 Lens 3 -5,2228 (ASP) 1,877 plastic 1,587 28,3 55,67 6 -5,1021 (ASP) 0,140 7 Aperture Plano -0,090 8 Lens 4 8,6205 (ASP) 0,702 Glass 2,001 25,4 3,85 9 -6,6690 (ASP) 0,912 10 Ape.-Blender Plano -0,042 11 Lens 5 2,0507 (ASP) 0,407 plastic 1,705 14,0 -3,02 12 0,9586 (ASP) 0,031 putty 1,485 53,2 - 13 Lens 6 0,8725 (ASP) 1,538 plastic 1,544 56,0 1,31 14 -1,4755 (ASP) -0,200 15 Aperture Plano 0,434 16 Lens 7 -1,7236 (ASP) 0,336 plastic 1,650 21,8 -3,64 17 -6,8493 (ASP) 0,400 18 filter Plano 0,200 Glass 1,517 64,2 - 19 Plano 0,198 20 Picture Plano - Note: Reference wavelength is 587.6 nm (d-line). An effective radius of aperture S1 (surface 7) is 1.352 mm. An effective radius of aperture S2 (surface 15) is 0.950 mm. TABLE 2B Aspheric coefficients Surface # 3 4 5 6 k = -9,90000E+01 6,64864E-01 2,89467E+00 -2,55930E+01 A4 = 1,7624362E-01 3,0556816E-01 -5,5533947E-02 9,6607837E-03 A6 = -9,6007260E-02 -1,9064073E-01 1,7661156E-02 -1,1244269E-02 A8 = 2,7783573E-02 1,6257355E-02 4,2957669E-03 1,2105151E-02 A10 = -4,8345167E-03 3,0545154E-02 -4,8734201E-03 -5,3478810E-03 A12 = 5,2330319E-04 -1,4572281E-02 1,6596918E-03 2,3018347E-03 A14 = -3,4506490E-05 2,7574106E-03 -2,7267476E-04 -6,9063489E-04 A16 = 1,2666625E-06 -1,9878685E-04 1,8005851E-05 1,0515796E-04 A18 = -1,9782175E-08 - - - Surface # 8 9 11 12 k = -7,67414E-01 1,06813E+01 -6,16072E+00 -5,41082E-01 A4 = 5,2819800E-02 4,3516100E-02 1,2630953E-01 2,9786790E-01 A6 = -3,7993200E-02 -3,6366500E-02 -4,1261103E-02 -2,5296680E+00 A8 = 1,4599400E-02 1,5189200E-02 -3,1679330E-01 1,2118040E+01 A10 = -3,2296400E-03 -3,5401100E-03 9,8070779E-01 -2,9481398E+01 A12 = 3,2080000E-04 3,6493000E-04 -1,2696755E+00 3,6010947E+01 A14 = - - 6,1804284E-01 -1,7712907E+01 Surface # 13 14 16 17 k = -1,37928E+00 -8,28157E-01 3,87005E-01 -9,90000E+01 A4 = 7,7725748E-01 1,1938924E-01 -2,1124153E-01 5,8549470E-01 A6 = -8,8781964E+00 -2,3322789E-01 2,6163381E+00 -2,5173087E+00 A8 = 4,0425371E+01 8,6764134E-01 -1,8272387E+01 5,3918426E+00 A10 = -8,6360230E+01 -2,2937529E+00 6,8354519E+01 -7,3328150E+00 A12 = 9,2329672E+01 3,2428822E+00 -1,5404648E+02 6,5137917E+00 A14 = -3,9755560E+01 -2,4170870E+00 2,1521264E+02 -3,7568888E+00 A16 = - 7,7722717E-01 -1,8311885E+02 1,3478003E+00 A18 = - - 8,7042979E+01 -2,7075060E-01 A20 = - - -1,7710537E+01 2,2945799E-02

[0117] 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 these parameters, listed in Table 2C below, are also the same as those given for the first embodiment, with corresponding values ​​for the second embodiment; therefore, no further explanation is given in this regard.

[0118] Furthermore, these parameters from Table 2A and Table 2B can be calculated as the following values ​​and must meet the following conditions: TABLE 2C Values ​​of the optical and physical parameters / definitions f [mm] 0,72 CT1 / CT6 0,45 Fno 1,88 T12 / CT2 3,14 HFOV [Grade] 99,8 T34 / T12 0,03 FOV [degrees] 199,6 BL / CT3 0,43 TL / lmgH 6,14 T45 / CT5 2,14 f2 / f7 0,75 CT7 / CT6 0,22 f56 / f1 -0,32 CTp / CTn 3,78 |f56 / f4| 0,56 |Drsr9| / |Drsr8| 0,05 f / R5 -0,14 (V1+V7) / V2 0,84 R1 / R8 -1,27 V7 21,8 R12 / R3 0,49 ET5 / ET7 1,20 R9 / R4 0,65 Y3R2 / Y1 R1 0,24 |R10+R11| / |R4| 0,58 |SAG7R1| / T67 1,76 |R10 / R5| 0,18 - - 3. Design

[0119] 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 lens system for imaging (whose reference numeral is omitted) of the present disclosure, and an image sensor IS. The optical lens system for imaging comprises, in the order from an object side to an image side along a beam path, a first lens element E1, a second lens element E2, a third lens element E3, an aperture S1, a fourth lens element E4, an aperture diaphragm ST, a fifth lens element E5, a sixth lens element E6, an aperture S2, a seventh lens element E7, a filter E8, and an image surface IMG. The optical lens system for imaging 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.

[0120] The first lens element E1 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 first lens element E1 is made of glass and both its object-side and image-side surfaces are spherical.

[0121] 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 also concave in a paraxial region. The second lens element E2 is made of glass and both its object-side and image-side surfaces are aspherical. The object-side surface of the second lens element E2 has three inflection points. The image-side surface of the second lens element E2 has one inflection point. The object-side surface of the second lens element E2 has a critical point in an off-axis region.

[0122] The third lens element E3, 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 third lens element E3 is made of glass 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.

[0123] 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.

[0124] The fifth lens element E5, 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 fifth lens element E5 is made of glass and both its object-side and image-side surfaces are aspherical.

[0125] 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 glass and both its object-side and image-side surfaces are aspherical. The object-side surface of the sixth lens element E6 and the image-side surface of the fifth lens element E5 are cemented together.

[0126] The seventh lens element E7, 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 seventh lens element E7 is made of plastic material and both its object-side and image-side surfaces are aspherical. The image-side surface of the seventh lens element E7 has two inflection points. The image-side surface of the seventh lens element E7 has two critical points in an off-axis region.

[0127] 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 lens system used for imaging. The IS image sensor is located on or near the image surface IMG of the optical lens system used for imaging.

[0128] In the third embodiment, the fifth lens element E5 and the sixth lens element E6 are cemented together to form a cemented lens set (whose reference numeral is omitted), and the image-side surface of the fifth lens element E5 and the object-side surface of the sixth lens element E6 are both aspherical surfaces and cemented surfaces that are cemented together.

[0129] The detailed optical data of the 3rd embodiment are shown in Table 3A and the aspherical surface data are listed in Table 3B below. TABLE 3A 3. Design f = 0.63 mm, Fno = 1.70, HFOV = 95.1 degrees Surface# radius of curvature thickness material index Abbe# Focal length 0 object infinity infinity 1 Lens 1 6,7809 (SPH) 0,633 Glass 2,000 20,7 -6,95 2 3,2722 (SPH) 1,500 3 Lens 2 -2,7599 (ASP) 0,597 Glass 1,729 54,7 -2,08 4 3,6845 (ASP) 1,736 5 Lens 3 -4,4099 (ASP) 2,045 Glass 2,001 25,4 5,83 6 -3,0936 (ASP) 0,110 7 Aperture Plano -0,060 8 Lens 4 24,3043 (ASP) 0,621 plastic 1,639 23,5 7,29 9 -5,6980 (ASP) 0,947 10 Ape.-Blender Plano -0,059 11 Lens 5 1,8350 (ASP) 0,458 Glass 1,946 17,9 -1,85 12 0,7877 (ASP) 0,029 putty 1,485 53,2 - 13 Lens 6 0,7045 (ASP) 0,959 Glass 1,589 61,3 1,01 14 -1,9253 (ASP) 0,247 15 Aperture Plano 0,387 16 Lens 7 -4,6552 (ASP) 0,279 plastic 1,705 14,0 -14,84 17 -8,5974 (ASP) 0,300 18 filter Plano 0,200 Glass 1,517 64,2 - 19 Plano 0,169 20 Picture Plano - Note: Reference wavelength is 587.6 nm (d-line). An effective radius of aperture S1 (surface 7) is 1,305 mm. An effective radius of aperture S2 (surface 15) is 1,000 mm. TABLE 3B Aspheric coefficients Surface # 3 4 5 6 k = -9,90000E+01 1,69462E+00 1,04401E+00 -5,53095E+00 A4 = 1,6857471E-01 3,8412696E-01 -2,7533389E-02 4,8878184E-03 A6 = -9,3441740E-02 -2,2981561E-01 -1,8589715E-02 -1,4258361E-02 A8 = 2,8606401E-02 -2,2948342E-02 4,3574820E-02 1,7416104E-02 A10 = -5,1834202E-03 1,0036984E-01 -3,3275442E-02 -1,1730328E-02 A12 = 5,5664199E-04 -5,2727819E-02 1,3499004E-02 5,0447574E-03 A14 = -3,2858383E-05 1,2456835E-02 -2,8627698E-03 -1,1913550E-03 A16 = 8,2219458E-07 -1,1947489E-03 2,4846255E-04 1,2224380E-04 Surface # 8 9 11 12 k = 1,51287E+01 7,72589E+00 -6,05766E+00 -6,97695E-01 A4 = 5,7205600E-02 3,7682700E-02 1,5519465E-01 1,0788158E-01 A6 = -3,8310300E-02 -3,6293500E-02 -1,8937964E-01 3,9822141E-01 A8 = 1,4314200E-02 1,5427800E-02 3,8024327E-01 -3,6909499E+00 A10 = -3,1801100E-03 -3,5419100E-03 -8,7717174E-01 1,1837936E+01 A12 = 3,2088100E-04 3,6492800E-04 1,0457609E+00 -1,8407205E+01 A14 = - - -4,8026871E-01 1,0632694E+01 Surface # 13 14 16 17 k = -1,51545E+00 -5,84536E-01 4,71034E+00 3,94298E+01 A4 = 2,0221200E-01 2,6217530E-02 4,3438701E-02 8,1918441E-01 A6 = 1,5731077E-03 -3,4626556E-01 -7,1096490E-01 -3,8322343E+00 A8 = -2,3068577E+00 1,5535485E+00 -2,3121751E+00 9,0553909E+00 A10 = 1,0622680E+01 -4,1470250E+00 1,7709113E+01 -1,3818493E+01 A12 = -1,7847404E+01 6,6053459E+00 -4,4969567E+01 1,4207517E+01 A14 = 1,0213222E+01 -5,7394839E+00 6,1301246E+01 -9,8066890E+00 A16 = - 2,1638372E+00 -4,7887357E+01 4,3505179E+00 A18 = - - 2,0283847E+01 -1,1166702E+00 A20 = - - -3,6420492E+00 1,2526169E-01

[0130] In the third embodiment, the equation for the aspherical surface profiles of the aforementioned lens elements is the same as the equation for the first embodiment. The definitions of these parameters, listed in Table 3C below, are also the same as those given for the first embodiment, with corresponding values ​​for the third embodiment; therefore, no further explanation is given in this regard.

[0131] Furthermore, these parameters from Table 3A and Table 3B can be calculated as the following values ​​and must meet the following conditions: TABLE 3C Values ​​of the optical and physical parameters / definitions f [mm] 0,63 CT1 / CT6 0,66 Fno 1,70 T12 / CT2 2,51 HFOV [Grade] 95,1 T34 / T12 0,03 FOV [degrees] 190,2 BL / CT3 0,33 TL / lmgH 6,60 T45 / CT5 1,94 f2 / f7 0,14 CT7 / CT6 0,29 f56 / f1 -0,38 CTp / CTn 2,09 |f56 / f4| 0,37 |Drsr9| / |Drsr8| 0,06 f / R5 -0,14 (V1+V7) / V2 0,63 R1 / R8 -1,19 V7 14,0 R12 / R3 0,70 ET5 / ET7 2,15 R9 / R4 0,50 Y3R2 / Y1 R1 0,29 |R10+R11| / |R4| 0,40 |SAG7R1| / T67 0,53 |R10 / R5| 0,18 - - 4. Design

[0132] 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 lens system for imaging (whose reference numeral is omitted) of the present disclosure, and an image sensor IS. The optical lens system for imaging comprises, in the order from an object side to an image side along a beam path, a first lens element E1, a second lens element E2, a third lens element E3, an aperture ST, a fourth lens element E4, an aperture diaphragm S1, a fifth lens element E5, a sixth lens element E6, an aperture S2, a seventh lens element E7, a filter E8, and an image surface IMG. The optical lens system for imaging 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.

[0133] The first lens element E1 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 first lens element E1 is made of glass and both its object-side and image-side surfaces are spherical.

[0134] 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 also concave 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. The image-side surface of the second lens element E2 has an inflection point. The object-side surface of the second lens element E2 has a critical point in an off-axis region.

[0135] The third lens element E3, 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 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.

[0136] The fourth lens element E4, 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 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.

[0137] The fifth lens element E5, 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 fifth lens element E5 is made of plastic material and both its object-side and image-side surfaces are aspherical.

[0138] 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 image-side surface of the sixth lens element E6 has an inflection point. The object-side surface of the sixth lens element E6 and the image-side surface of the fifth lens element E5 are cemented together.

[0139] The seventh lens element E7, 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 seventh lens element E7 is made of plastic material and both its object-side and image-side surfaces are aspheric. The object-side surface of the seventh lens element E7 has two inflection points. The image-side surface of the seventh lens element E7 has two inflection points. The object-side surface of the seventh lens element E7 has two critical points in an off-axis region. The image-side surface of the seventh lens element E7 has two critical points in an off-axis region.

[0140] 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 lens system used for imaging. The IS image sensor is located on or near the image surface IMG of the optical lens system used for imaging.

[0141] In the 4th embodiment, the fifth lens element E5 and the sixth lens element E6 are cemented together to form a cemented lens set (whose reference numeral is omitted), and the image-side surface of the fifth lens element E5 and the object-side surface of the sixth lens element E6 are both aspherical surfaces and cemented surfaces that are cemented together.

[0142] The detailed optical data of the 4th embodiment are shown in Table 4A and the aspherical surface data are shown in Table 4B below. TABLE 4A 4. Design f = 0.63 mm, Fno = 1.77, HFOV = 96.1 degrees Surface# radius of curvature thickness material index Abbe# Focal length 0 object infinity infinity 1 Lens 1 8,1335 (SPH) 0,633 Glass 2,003 28,3 -6,33 2 3,4268 (SPH) 1,502 3 Lens 2 -2,6779 (ASP) 0,850 plastic 1,544 56,0 -2,75 4 3,7739 (ASP) 1,756 5 Lens 3 -4,6127 (ASP) 2,073 plastic 1,639 23,5 3,02 6 -1,5998 (ASP) 0,104 7 Aperture Plano 0,099 8 Lens 4 -3,7744 (ASP) 0,429 plastic 1,650 21,8 -15,35 9 -6,3454 (ASP) 0,748 10 Ape.-Blender Plano -0,057 11 Lens 5 1,7719 (ASP) 0,400 plastic 1,705 14,0 -3,21 12 0,9015 (ASP) 0,023 putty 1,485 53,2 - 13 Lens 6 0,6273 (ASP) 0,761 plastic 1,544 56,0 1,06 14 -4,3210 (ASP) 0,439 15 Aperture Plano 0,441 16 Lens 7 60,7635 (ASP) 0,267 Plastic 1,680 18,2 8,44 17 -5,2549 (ASP) 0,270 18 filter Plano 0,210 Glass 1,517 64,2 - 19 Plano 0,153 20 Picture Plano - Note: Reference wavelength is 587.6 nm (d-line). An effective radius of aperture S1 (surface 7) is 1.087 mm. An effective radius of aperture S2 (surface 15) is 1,000 mm. TABLE 4B Aspheric coefficients Surface # 3 4 5 6 k = -9,90000E+01 1,51448E+00 1,29409E+00 -6,16896E+00 A4 = 1,4666723E-01 3,2298817E-01 -1,2608165E-02 6,5152436E-03 A6 = -7,0045461E-02 -1,5457275E-01 -7,6764990E-03 -2,8465183E-02 A8 = 1,8679633E-02 -7,6290478E-02 7,3913077E-03 4,6767704E-02 A10 = -3,0001780E-03 1,3371627E-01 -6,3928611E-04 -3,8073554E-02 A12 = 2,8898159E-04 -6,9316104E-02 -1,1360856E-03 1,7892668E-02 A14 = -1,5383978E-05 1,6764916E-02 4,1114305E-04 -4,4646826E-03 A16 = 3,4756080E-07 -1,5949230E-03 -4,2800453E-05 4,7189016E-04 Surface # 8 9 11 12 k = -6,32249E+01 1,08447E+01 -4,36638E+00 -4,19688E-01 A4 = 6,0760500E-02 3,2936300E-02 1,8572777E-01 -2,0081552E-01 A6 = -3,8212000E-02 -3,6010000E-02 -1,7574539E-01 4,0678425E+00 A8 = 1,4125800E-02 1,5685100E-02 4,7433298E-01 -2,4117638E+01 A10 = -3,2287600E-03 -3,6701500E-03 -1,3557634E+00 7,6527322E+01 A12 = 3,2088500E-04 3,6492700E-04 1,9676914E+00 -1,1621122E+02 A14 = - - -1,0781635E+00 6,4804071E+01 Surface # 13 14 16 17 k = -1,84391E+00 -6,61608E+00 -9,90000E+01 1,27290E+01 A4 = -1,0781177E+00 2,0637713E-02 4,0551403E-01 1,9042921E+00 A6 = 9,7543407E+00 -3,6165602E-01 -2,5072328E+00 -8,3817409E+00 A8 = -5,3084893E+01 1,7943661E+00 -2,4534993E-02 1,9394811E+01 A10 = 1,6507522E+02 -4,5453062E+00 2,0305725E+01 -2,8331017E+01 A12 = -2,3916407E+02 6,3474335E+00 -5,8679682E+01 2,7104740E+01 A14 = 1,2509022E+02 -4,1017576E+00 8,2724729E+01 -1,6975518E+01 A16 = - 1,1245865E+00 -6,5620914E+01 6,6933759E+00 A18 = - - 2,8209812E+01 -1,5030017E+00 A20 = - - -5,1347707E+00 1,4602760E-01

[0143] In the fourth embodiment, the equation for the aspherical surface profiles of the aforementioned lens elements is the same as the equation for the first embodiment. The definitions of these parameters, listed in Table 4C below, are also the same as those given for the first embodiment, with corresponding values ​​for the fourth embodiment; therefore, no further explanation is given in this regard.

[0144] Furthermore, these parameters from Table 4A and Table 4B can be calculated as the following values ​​and must meet the following conditions: TABLE 4C Values ​​of the optical and physical parameters / definitions f [mm] 0,63 CT1 / CT6 0,83 Fno 1,77 T12 / CT2 1,77 HFOV [Grade] 96,1 T34 / T12 0,14 FOV [degrees] 192,2 BL / CT3 0,31 TL / lmgH 6,37 T45 / CT5 1,73 f2 / f7 -0,33 CT7 / CT6 0,35 f56 / f1 -0,44 CTp / CTn 1,90 |f56 / f4| 0,18 |Drsr9| / |Drsr8| 0,08 f / R5 -0,14 (V1+V7) / V2 0,83 R1 / R8 -1,28 V7 18,2 R12 / R3 1,61 ET5 / ET7 2,08 R9 / R4 0,47 Y3R2 / Y1 R1 0,24 |R10+R11| / |R4| 0,41 |SAG7R1| / T67 0,43 |R10 / R5| 0,20 - - 5. Design

[0145] 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 lens system for imaging (whose reference numeral is omitted) of the present disclosure and an image sensor IS. The optical lens system for imaging comprises, in the order from an object side to an image side along a beam path, a first lens element E1, a second lens element E2, a third lens element E3, an aperture ST, a fourth lens element E4, an aperture diaphragm S1, a fifth lens element E5, a sixth lens element E6, an aperture S2, a seventh lens element E7, a filter E8, and an image surface IMG. The optical lens system for imaging 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.

[0146] The first lens element E1 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 first lens element E1 is made of glass and both its object-side and image-side surfaces are spherical.

[0147] 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 also concave 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. The object-side surface of the second lens element E2 has a critical point in an off-axis region.

[0148] 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. The image-side surface of the third lens element E3 has a critical point in an off-axis region.

[0149] 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 glass and both its object-side and image-side surfaces are aspherical.

[0150] The fifth lens element E5, 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 fifth lens element E5 is made of plastic material and both its object-side and image-side surfaces are aspherical.

[0151] 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 and the image-side surface of the fifth lens element E5 are cemented together.

[0152] 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 an inflection point.

[0153] The image-side surface of the seventh lens element E7 has an 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.

[0154] 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 lens system used for imaging. The IS image sensor is located on or near the image surface IMG of the optical lens system used for imaging.

[0155] In the 5th embodiment, the fifth lens element E5 and the sixth lens element E6 are cemented together to form a cemented lens set (whose reference numeral is omitted), and the image-side surface of the fifth lens element E5 and the object-side surface of the sixth lens element E6 are both aspherical surfaces and cemented surfaces that are cemented together.

[0156] The detailed optical data of the 5th embodiment are shown in Table 5A and the aspherical surface data are shown in Table 5B below. TABLE 5A 5. Design f = 1.04 mm, Fno = 1.85, HFOV = 100.0 degrees Surface# radius of curvature thickness material index Abbe# Focal length 0 object infinity infinity 1 Lens 1 9,8275 (SPH) 0,800 Glass 1,804 46,6 -5,08 2 2,7795 (SPH) 1,614 3 Lens 2 -5,5535 (ASP) 0,600 plastic 1,544 56,0 -4,43 4 4,4189 (ASP) 1,065 5 Lens 3 -7,6119 (ASP) 2,198 plastic 1,544 56,0 -8,26 6 12,0970 (ASP) 0,145 7 Aperture Plano -0,095 8 Lens 4 4,5361 (ASP) 0,738 Glass 1,693 53,2 4,02 9 -6,7339 (ASP) 0,156 10 Ape.-Blender Plano -0,106 11 Lens 5 Plano 1,195 plastic 1,669 19,5 -3,21 12 0,7176 (ASP) 0,031 Kit 1,485 53,2 - 13 Lens 6 0,6552 (ASP) 1,570 plastic 1,544 56,0 1,15 14 -2,1153 (ASP) -0,100 15 Aperture Plano 0,210 16 Lens 7 9,7453 (ASP) 0,448 plastic 1,669 19,5 -5,87 17 2,7476 (ASP) 0,500 18 filter Plano 0,210 Glass 1,517 64,2 - 19 Plano 0,412 20 Picture Plano - Note: Reference wavelength is 587.6 nm (d-line). The effective radius of aperture S1 (surface 7) is 0.986 mm. An effective radius of aperture S2 (surface 15) is 1,110 mm. TABLE 5B Aspheric coefficients Surface # 3 4 5 6 k = -9,90000E+01 1,29382E+00 9,07328E+00 -9,90000E+01 A4 = 8,0311797E-02 1,6141843E-01 -2,7040464E-02 -5,5879417E-02 A6 = -4,6051308E-02 -9,8935971E-02 -2,7821528E-02 1,5095641E-02 A8 = 1,6492173E-02 2,2544403E-02 3,7323464E-02 -2,8586632E-02 A10 = -3,6542808E-03 1,3690328E-02 -2,7185450E-02 9,3385139E-02 A12 = 5,0075725E-04 -1,1221135E-02 1,2496852E-02 -1,1290238E-01 A14 = -3,9164206E-05 3,3769593E-03 -3,2441542E-03 6,2696281E-02 A16 = 1,3452616E-06 -4,0595226E-04 3,6318396E-04 -1,3406285E-02 Surface # 8 9 11 12 k = -4,43062E+00 7,43426E+00 -7,46736E+00 -8,75947E-01 A4 = 3,5077800E-02 4,4376200E-02 1,1996882E-01 -3,7766891E-01 A6 = -2,5715100E-02 -3,2335900E-02 -1,5622193E-01 1,1566983E+00 A8 = 2,1370200E-02 1,2432800E-02 1,6924986E-01 -1,7471821E+00 A10 = -8,9338000E-03 -6,3184800E-03 -1,6837406E-01 9,9081332E-01 A12 = 3,2080400E-04 3,6492800E-04 1,1785681 E-01 1,2893629E-01 A14 = - - -4,3893566E-02 -2,4157986E-01 Surface # 13 14 16 17 k = -1,74056E+00 -1,44985E-01 7,12580E+01 -2,32911E+00 A4 = -6,6496881E-01 2,0300097E-01 7,3996041E-02 1,2179040E-02 A6 = 3,3480701E+00 -6,4702207E-01 -6,8926874E-01 -3,6312923E-01 A8 = -5,7427805E+00 1,3334937E+00 1,1281912E+00 5,7367946E-01 A10 = 4,4223883E+00 -1,6339595E+00 -9,8346471E-01 -5,1250722E-01 A12 = -1,1556619E+00 1,1607493E+00 2,9357264E-01 2,8361911E-01 A14 = -1,1965111E-01 -4,6491336E-01 2,5994448E-01 -9,8868624E-02 A16 = - 8,1504558E-02 -3,8893599E-01 2,0653149E-02 A18 = - - 2,2561373E-01 -2,2989836E-03 A20 = - - -5,7545222E-02 1,0386523E-04

[0157] In the 5th embodiment, the equation for the aspherical surface profiles of the aforementioned lens elements is the same as the equation for the 1st embodiment. The definitions of these parameters, listed in Table 5C below, are also the same as those given for the 1st embodiment, with corresponding values ​​for the 5th embodiment; therefore, no further explanation is given in this regard.

[0158] Furthermore, these parameters from Table 5A and Table 5B can be calculated as the following values ​​and must meet the following conditions: TABLE 5C Values ​​of the optical and physical parameters / definitions f [mm] 1,04 CT1 / CT6 0,51 Fno 1,85 T12 / CT2 2,69 HFOV [Grade] 100,0 T34 / T12 0,03 FOV [degrees] 200,0 BL / CT3 0,51 TL / lmgH 6,05 T45 / CT5 0,04 f2 / f7 0,75 CT7 / CT6 0,29 f56 / f1 -0,53 CTp / CTn 1,31 |f56 / f4| 0,67 |Drsr9| / |Drsr8| 0,68 f / R5 -0,14 (V1+V7) / V2 1,18 R1 / R8 -1,46 V7 19,5 R12 / R3 0,38 ET5 / ET7 2,90 R9 / R4 0,41 Y3R2 / Y1 R1 0,20 |R10+R11| / |R4| 0,31 |SAG7R1| / T67 1,63 |R10 / R5| 0,09 - - 6. Design

[0159] 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 6th embodiment. Fig.11 The image acquisition unit 6 comprises the optical lens system for imaging (whose reference numeral is omitted) of the present disclosure and an image sensor IS. The optical lens system for imaging comprises, in the order from an object side to an image side along a beam path, a first lens element E1, a second lens element E2, a third lens element E3, an aperture S1, a fourth lens element E4, an aperture diaphragm ST, a fifth lens element E5, a sixth lens element E6, an aperture S2, a seventh lens element E7, a filter E8, and an image surface IMG. The optical lens system for imaging 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.

[0160] The first lens element E1 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 first lens element E1 is made of glass and both its object-side and image-side surfaces are spherical.

[0161] 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 also concave 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. The image-side surface of the second lens element E2 has one inflection point. The object-side surface of the second lens element E2 has a critical point in an off-axis region.

[0162] 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 convex 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 two inflection points. The image-side surface of the third lens element E3 has one inflection point.

[0163] 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 glass and both its object-side and image-side surfaces are aspherical.

[0164] The fifth lens element E5, 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 fifth lens element E5 is made of plastic material and both its object-side and image-side surfaces are aspherical.

[0165] The sixth lens element E6, 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 sixth lens element E6 is made of plastic material and both its object-side and image-side surfaces are aspherical. The image-side surface of the sixth lens element E6 has an inflection point. The object-side surface of the sixth lens element E6 and the image-side surface of the fifth lens element E5 are cemented together.

[0166] The seventh lens element E7, 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 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 image-side surface of the seventh lens element E7 has a critical point in an off-axis region.

[0167] 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 lens system used for imaging. The IS image sensor is located on or near the image surface IMG of the optical lens system used for imaging.

[0168] In the 6th embodiment, the fifth lens element E5 and the sixth lens element E6 are cemented together to form a cemented lens set (whose reference numeral is omitted), and the image-side surface of the fifth lens element E5 and the object-side surface of the sixth lens element E6 are both aspherical surfaces and cemented surfaces that are cemented together.

[0169] The detailed optical data of the 6th embodiment are shown in Table 6A and the aspherical surface data are shown in Table 6B below. TABLE 6A 6. Design f = 0.83 mm, Fno = 1.75, HFOV = 92.2 degrees Surface# radius of curvature thickness material index Abbe# Focal length 0 object infinity infinity 1 Lens 1 8,5199 (SPH) 0,899 Glass 2,003 28,3 -4,95 2 2,9716 (SPH) 2,013 3 Lens 2 -2,5916 (ASP) 0,956 plastic 1,544 56,0 -3,19 4 5,9495 (ASP) 1,532 5 Lens 3 -3,2550 (ASP) 1,062 plastic 1,705 14,0 -26,98 6 -4,4571 (ASP) 0,218 7 Aperture Plano -0,168 8 Lens 4 4,6883 (ASP) 0,759 Glass 1,954 32,3 3,05 9 -7,0576 (ASP) 1,162 10 Ape.-Blender Plano -0,026 11 Lens 5 2,1602 (ASP) 1,578 plastic 1,530 55,8 0,60 12 -0,2806 (ASP) 0,025 putty 1,485 53,2 - 13 Lens 6 -0,3754 (ASP) 0,464 plastic 1,661 20,3 -1,17 14 -1,0878 (ASP) -0,100 15 Aperture Plano 0,150 16 Lens 7 -2,8259 (ASP) 0,305 plastic 1,566 37,4 -3,59 17 7,5004 (ASP) 0,500 18 filter Plano 0,210 Glass 1,517 64,2 - 19 Plano 0,267 20 Picture Plano - Note: Reference wavelength is 587.6 nm (d-line). An effective radius of aperture S1 (surface 7) is 1.555 mm. An effective radius of aperture S2 (surface 15) is 1,000 mm. TABLE 6B Aspheric coefficients Surface # 3 4 5 6 k = -3,54644E+01 8,12198E+00 -1,98309E+00 4,57299E+00 A4 = 7,9677294E-02 2,3479438E-01 -7,2061458E-02 4,1881577E-03 A6 = -4,1597140E-02 -2,1307681E-01 2,3473953E-02 -6,5418156E-03 A8 = 1,4338330E-02 1,3340856E-01 2,9361509E-02 1,3116023E-02 A10 = -3,3768546E-03 -5,1788915E-02 -3,0722536E-02 -7,6410525E-03 A12 = 5,4316140E-04 8,9937074E-03 1,3097261E-02 2,7999270E-03 A14 = -5,7134941E-05 2,0340171E-03 -2,7340561E-03 -5,8406379E-04 A16 = 3,4878829E-06 -1,2085488E-03 2,2201678E-04 5,5648164E-05 A18 = -9,2371723E-08 1,4639598E-04 - - Surface # 8 9 11 12 k = 3,07126E+00 9,42770E+00 2,49091E+00 -1,08086E+00 A4 = 4,9289000E-02 5,2476200E-02 3,0075579E-02 6,8873315E+00 A6 = -3,9943100E-02 -3,4753400E-02 -1,6240460E-01 -4,4132019E+01 A8 = 1,4982700E-02 1,4373300E-02 7,7105293E-01 1,3800399E+02 A10 = -3,1811000E-03 -3,3159200E-03 -2,1191429E+00 -2,2573778E+02 A12 = 3,1447900E-04 3,6378600E-04 3,0830374E+00 1,8458486E+02 A14 = - - -2,1374520E+00 -5,9683321E+01 A16 = - - 5,0218219E-01 - Surface # 13 14 16 17 k = -1,11092E+00 -2,98216E+00 -4,74280E+01 2,35295E+01 A4 = 1,2012941E+00 -2,5476432E-01 -5,3891331E-01 2,1363480E-01 A6 = -9,6506833E+00 1,1072935E+00 2,0038776E+00 -1,2279153E+00 A8 = 3,2656335E+01 -8,5186482E-01 -5,3388856E+00 2,9161201E+00 A10 = -5,4795715E+01 -6,9440609E-01 1,4174518E+01 -4,2090969E+00 A12 = 4,4847518E+01 1,7817974E+00 -2,8752232E+01 3,9347262E+00 A14 = -1,4472713E+01 -1,2750595E+00 3,7691504E+01 -2,4064776E+00 A16 = - 3,2242135E-01 -2,9920224E+01 9,2911096E-01 A18 = - - 1,3114946E+01 -2,0553359E-01 A20 = - - -2,4443789E+00 1,9762369E-02

[0170] 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 these parameters, listed in Table 6C below, are also the same as those given for the 1st embodiment, with corresponding values ​​for the 6th embodiment; therefore, no further explanation is given in this regard.

[0171] Furthermore, these parameters from Table 6A and Table 6B can be calculated as the following values ​​and must meet the following conditions: TABLE 6C Values ​​of the optical and physical parameters / definitions f [mm] 0,83 CT1 / CT6 1,94 Fno 1,75 T12 / CT2 2,11 HFOV [Grade] 92,2 T34 / T12 0,02 FOV [degrees] 184,4 BL / CT3 0,92 TL / lmgH 6,48 T45 / CT5 0,72 f2 / f7 0,89 CT7 / CT6 0,66 f56 / f1 -0,43 CTp / CTn 3,40 |f56 / f4| 0,70 |Drsr9| / |Drsr8| 0,02 f / R5 -0,25 (V1+V7) / V2 1,17 R1 / R8 -1,21 V7 37,4 R12 / R3 0,42 ET5 / ET7 1,61 R9 / R4 0,36 Y3R2 / Y1 R1 0,32 |R10+R11| / |R4| 0,11 |SAG7R1| / T67 2,25 |R10 / R5| 0,09 - - 7. Design

[0172] 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 lens system for imaging (whose reference numeral is omitted) of the present disclosure and an image sensor IS. The optical lens system for imaging comprises, in the order from an object side to an image side along a beam path, a first lens element E1, a second lens element E2, a third lens element E3, an aperture S1, a fourth lens element E4, an aperture diaphragm ST, a fifth lens element E5, a sixth lens element E6, an aperture S2, a seventh lens element E7, a filter E8, and an image surface IMG. The optical lens system for imaging 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.

[0173] The first lens element E1 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 first lens element E1 is made of glass and both its object-side and image-side surfaces are spherical.

[0174] The second lens element E2, 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 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. The image-side surface of the second lens element E2 has one inflection point.

[0175] 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 convex 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. The image-side surface of the third lens element E3 has a critical point in an off-axis region.

[0176] 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 glass and both its object-side and image-side surfaces are aspherical.

[0177] The fifth lens element E5, 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 fifth lens element E5 is made of plastic material and both its object-side and image-side surfaces are aspherical.

[0178] 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 image-side surface of the sixth lens element E6 has an inflection point. The object-side surface of the sixth lens element E6 and the image-side surface of the fifth lens element E5 are cemented together.

[0179] The seventh lens element E7, 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 seventh lens element E7 is made of plastic material and both its object-side and image-side surfaces are aspherical. The image-side surface of the seventh lens element E7 has an inflection point. The image-side surface of the seventh lens element E7 has a critical point in an off-axis region.

[0180] 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 lens system used for imaging. The IS image sensor is located on or near the image surface IMG of the optical lens system used for imaging.

[0181] In the 7th embodiment, the fifth lens element E5 and the sixth lens element E6 are cemented together to form a cemented lens set (whose reference numeral is omitted), and the image-side surface of the fifth lens element E5 and the object-side surface of the sixth lens element E6 are both aspherical surfaces and cemented surfaces that are cemented together.

[0182] The detailed optical data of the 7th embodiment are shown in Table 7A and the aspherical surface data are shown in Table 7B below. TABLE 7A 7. Design f = 0.86 mm, Fno = 1.84, HFOV = 99.9 degrees Surface# radius of curvature thickness material index Abbe# Focal length 0 object infinity infinity 1 Lens 1 7,4050 (SPH) 0,828 Glass 2,003 28,3 -6,83 2 3,3587 (SPH) 1,905 3 Lens 2 27,8751 (ASP) 0,564 plastic 1,544 56,0 -2,80 4 1,4332 (ASP) 1,633 5 Lens 3 -5,8741 (ASP) 1,624 plastic 1,705 14,0 -16,76 6 13,0178 (ASP) 0,191 7 Aperture Plano -0,141 8 Lens 4 4,4392 (ASP) 0,740 Glass 1,805 25,5 3,46 9 -6,9466 (ASP) 0,866 10 Ape.-Blender Plano -0,072 11 Lens 5 1,8343 (ASP) 0,679 plastic 1,705 14,0 -4,88 12 1,0132 (ASP) 0,026 putty 1,485 53,2 - 13 Lens 6 0,8523 (ASP) 1,308 plastic 1,511 56,8 1,31 14 -1,5217 (ASP) -0,197 15 Aperture Plano 0,429 16 Lens 7 -4,8016 (ASP) 0,466 plastic 1,639 23,5 -3,50 17 4,3510 (ASP) 0,500 18 filter Plano 0,210 Glass 1,517 64,2 - 19 Plano 0,163 20 Picture Plano - Note: Reference wavelength is 587.6 nm (d-line). An effective radius of aperture S1 (surface 7) is 1.257 mm. An effective radius of aperture S2 (surface 15) is 1.030 mm. TABLE 7B Aspheric coefficients Surface # 3 4 5 6 k = -9,90000E+01 -2,43444E+00 1,10442E+00 -1,44650E+01 A4 = 6,6963792E-02 5,8449782E-02 -4,9830266E-02 1,4161668E-02 A6 = -3,5676262E-02 1,6407771E-01 1,1974911E-02 -1,2051244E-02 A8 = 9,8890262E-03 -3,0483013E-01 9,6408893E-03 1,9956069E-02 A10 = -1,5892418E-03 2,5145877E-01 -8,2019309E-03 -1,5549594E-02 A12 = 1,5009950E-04 -1,1456319E-01 2,5713980E-03 8,5120721E-03 A14 = -7,8116692E-06 2,8619790E-02 -4,1371754E-04 -2,5162824E-03 A16 = 1,7456806E-07 -3,0514245E-03 2,3520558E-05 2,7194803E-04 Surface # 8 9 11 12 k = 5,07629E+00 1,16318E+01 -6,29508E+00 -5,42673E-01 A4 = 5,1155200E-02 4,4872400E-02 1,2629834E-01 2,8945992E-01 A6 = -3,7410800E-02 -3,6642000E-02 -6,5704148E-02 -1,4758431E+00 A8 = 1,4995800E-02 1,5645200E-02 -8,2315863E-02 4,9468158E+00 A10 = -3,1278100E-03 -2,8545200E-03 8,4737861E-02 -8,7098869E+00 A12 = 3,2080400E-04 3,6492800E-04 7,8350196E-02 7,1041390E+00 A14 = - - -9,7262309E-02 -2,1850005E+00 Surface # 13 14 16 17 k = -1,27887E+00 -9,53926E-02 1,42576E+01 4,43453E-01 A4 = 1,0919436E+00 1,2630214E-01 -1,1915786E-01 1,9153618E-01 A6 = -9,5540936E+00 -6,2845059E-01 3,6518866E-01 -1,0107905E+00 A8 = 3,2605828E+01 1,9265141E+00 -4,4501965E+00 1,8799654E+00 A10 = -5,2992136E+01 -3,2993025E+00 1,7229621E+01 -2,1500736E+00 A12 = 4,1313643E+01 3,2016380E+00 -3,5205477E+01 1,6190292E+00 A14 = -1,2301930E+01 -1,6683807E+00 4,2650979E+01 -8,0678363E-01 A16 = - 3,7923180E-01 -3,1063797E+01 2,5579959E-01 A18 = - - 1,2676077E+01 -4,6672138E-02 A20 = - - -2,2489701E+00 3,7211858E-03

[0183] 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 these parameters, listed in Table 7C below, are also the same as those given for the 1st embodiment, with corresponding values ​​for the 7th embodiment; therefore, no further explanation is given in this regard.

[0184] Furthermore, these parameters from Table 7A and Table 7B can be calculated as the following values ​​and must meet the following conditions: TABLE 7C Values ​​of the optical and physical parameters / definitions f [mm] 0,86 CT1 / CT6 0,63 Fno 1,84 T12 / CT2 3,38 HFOV [Grade] 99,9 T34 / T12 0,03 FOV [degrees] 199,8 BL / CT3 0,54 TL / lmgH 6,25 T45 / CT5 1,17 f2 / f7 0,80 CT7 / CT6 0,36 f56 / f1 -0,33 CTp / CTn 1,93 |f56 / f4| 0,65 |Drsr9| / |Drsr8| 0,08 f / R5 -0,15 (V1+V7) / V2 0,93 R1 / R8 -1,07 V7 23,5 R12 / R3 -0,05 ET5 / ET7 1,26 R9 / R4 1,28 Y3R2 / Y1 R1 0,24 |R10+R11| / |R4| 1,30 |SAG7R1| / T67 1,52 |R10 / R5| 0,17 - - 8. Design

[0185] 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.15 The image acquisition unit 8 comprises the optical lens system for imaging (whose reference numeral is omitted) of the present disclosure and an image sensor IS. The optical lens system for imaging comprises, in the order from an object side to an image side along a beam path, a first lens element E1, a second lens element E2, a third lens element E3, an aperture S1, a fourth lens element E4, an aperture diaphragm ST, 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 lens system for imaging 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.

[0186] The first lens element E1 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 first lens element E1 is made of glass and both its object-side and image-side surfaces are aspherical.

[0187] 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 also concave 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. The image-side surface of the second lens element E2 has one inflection point. The object-side surface of the second lens element E2 has a critical point in an off-axis region.

[0188] 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 convex 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. The image-side surface of the third lens element E3 has a critical point in an off-axis region.

[0189] 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 glass and both its object-side and image-side surfaces are aspherical.

[0190] The fifth lens element E5, 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 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 an inflection point. The image-side surface of the fifth lens element E5 also has an inflection point.

[0191] 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 image-side surface of the sixth lens element E6 has an inflection point.

[0192] The seventh lens element E7, 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 seventh lens element E7 is made of plastic material and both its object-side and image-side surfaces are aspherical. The image-side surface of the seventh lens element E7 has an inflection point. The image-side surface of the seventh lens element E7 has a critical point in an off-axis region.

[0193] 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 lens system used for imaging. The IS image sensor is located on or near the image surface IMG of the optical lens system used for imaging.

[0194] The detailed optical data of the 8th embodiment are shown in Table 8A and the aspherical surface data are shown in Table 8B below. TABLE 8A 8. Design f = 0.78 mm, Fno = 1.83, HFOV = 100.7 degrees Surface# radius of curvature thickness material index Abbe# Focal length 0 object infinity infinity 1 Lens 1 8,7794 (ASP) 0,763 Glass 1,904 31,4 -13,30 2 4,8637 (ASP) 1,607 3 Lens 2 -1,5081 (ASP) 0,845 plastic 1,551 44,8 -2,65 4 55,8136 (ASP) 1,785 5 Lens 3 -6,3411 (ASP) 2,123 plastic 1,697 16,3 -21,99 6 12,3008 (ASP) 0,205 7 Aperture Plano -0,155 8 Lens 4 4,5384 (ASP) 0,863 Glass 1,901 37,0 3,09 9 -6,5424 (ASP) 0,551 10 Ape.-Blender Plano 0,167 11 Lens 5 4,3671 (ASP) 0,411 plastic 1,705 14,0 -9,39 12 2,5285 (ASP) 0,090 13 Lens 6 3,1495 (ASP) 1,521 plastic 1,544 56,0 1,55 14 -0,9562 (ASP) 0,224 15 Lens 7 -4,6063 (ASP) 0,401 plastic 1,656 21,3 -2,83 16 3,2160 (ASP) 0,450 17 filter Plano 0,210 Glass 1,517 64,2 - 18 Plano 0,249 19 Picture Plano - Note: Reference wavelength is 587.6 nm (d-line). An effective radius of aperture S1 (surface 7) is 1.325 mm. TABLE 8B Aspheric coefficients Surface # 1 2 3 4 k = -4,20868E-01 -1,13840E+00 -8,06765E+01 3,70223E+01 A4 = 5,8004467E-03 -1,5001135E-02 3,4870389E-02 4,6908900E-01 A6 = -3,7327828E-04 3,5850136E-03 -1,5982658E-03 -3,5225315E-01 A8 = 8,3383272E-06 -2,9876754E-04 -1,3906973E-03 1,8420511E-01 A10 = -4,3616278E-08 9,3932313E-06 3,0836437E-04 -7,1759222E-02 A12 = - - -2,7508663E-05 1,8627168E-02 A14 = - - 1,1125731 E-06 -2,7271175E-03 A16 = - - -1,6213235E-08 1,6653601E-04 Surface # 5 6 8 9 k = 2,95375E+00 -8,73384E+00 5,20302E+00 1,10950E+01 A4 = -1,6986344E-02 2,7696894E-02 4,5924100E-02 5,0242100E-02 A6 = -2,1540555E-02 -3,5165942E-02 -3,6840800E-02 -3,6789900E-02 A8 = 2,6304395E-02 2,8738021E-02 1,5202500E-02 1,5582500E-02 A10 = -1,4146876E-02 -1,3280699E-02 -3,1355200E-03 -2,9568700E-03 A12 = 4,3990085E-03 4,5962454E-03 3,2083500E-04 3,6512300E-04 A14 = -7,5808204E-04 -9,9001249E-04 - - A16 = 5,5636436E-05 9,3562455E-05 - - Surface # 11 12 13 14 k = -4,92806E+01 -3,64101E+00 -5,22644E+00 -1,03501E+00 A4 = 1,0614746E-01 2,0730665E-01 1,6022557E-01 1,4396421E-01 A6 = -3,0820718E-01 -6,6129732E-01 -4,0609561E-01 3,2048168E-01 A8 = 4,2079333E-01 1,3154435E+00 5,7634891E-01 -1,4843129E+00 A10 = -6,3945575E-01 -1,7753368E+00 -4,6819652E-01 2,3301406E+00 A12 = 7,1350886E-01 1,3492831E+00 2,2745717E-01 -1,9244372E+00 A14 = -5,2564040E-01 -4,3912580E-01 -5,3271551E-02 8,2755601E-01 A16 = - - - -1,4442292E-01 Surface # 15 16 k = 7,74012E+00 -6,62136E-01 A4 = -5,5029894E-01 2,1446667E-01 A6 = 4,3332145E+00 -6,3539867E-01 A8 = -1,6451963E+01 7,4487103E-01 A10 = 3,6288118E+01 -4,7753842E-01 A12 = -5,0757555E+01 1,2963671E-01 A14 = 4,5600087E+01 3,1564463E-02 A16 = -2,5508138E+01 -3,5822322E-02 A18 = 8,0897861E+00 1,0558472E-02 A20 = -1,1110687E+00 -1,1202037E-03

[0195] 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 these parameters, listed in Table 8C below, are also the same as those given for the 1st embodiment, with corresponding values ​​for the 8th embodiment; therefore, no further explanation is given in this regard.

[0196] Furthermore, these parameters from Table 8A and Table 8B can be calculated as the following values ​​and must meet the following conditions: TABLE 8C Values ​​of the optical and physical parameters / definitions f [mm] 0,78 |R10 / R5| 0,40 Fno 1,83 CT1 / CT6 0,50 HFOV [Grade] 100,7 T12 / CT2 1,90 FOV [degrees] 201,4 T34 / T12 0,03 TL / lmgH 6,55 BL / CT3 0,43 f2 / f7 0,94 T45 / CT5 1,75 f56 / f1 -0,13 CT7 / CT6 0,26 |f56 / f4| 0,56 |Drsr9| / |Drsr8| 0,30 f / R5 -0,12 (V1+V7) / V2 1,18 R1 / R8 -1,34 V7 21,3 R12 / R3 0,63 ET5 / ET7 0,57 R9 / R4 0,08 Y3R2 / Y1 R1 0,25 |R10+R11| / |R4| 0,10 |SAG7R1| / T67 1,55 9. Design

[0197] 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 lens system for imaging (whose reference numeral is omitted) of the present disclosure and an image sensor IS. The optical lens system for imaging comprises, in the order from an object side to an image side along a beam path, a first lens element E1, a second lens element E2, a third lens element E3, an aperture ST, a fourth lens element E4, an aperture diaphragm S1, a fifth lens element E5, a sixth lens element E6, an aperture S2, a seventh lens element E7, a filter E8, and an image surface IMG. The optical lens system for imaging 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.

[0198] The first lens element E1 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 first lens element E1 is made of glass and both its object-side and image-side surfaces are spherical.

[0199] 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 also concave 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. The object-side surface of the second lens element E2 has a critical point in an off-axis region.

[0200] 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 convex 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. The image-side surface of the third lens element E3 has a critical point in an off-axis region.

[0201] 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 glass and both its object-side and image-side surfaces are aspherical.

[0202] The fifth lens element E5, 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 fifth lens element E5 is made of plastic material and both its object-side and image-side surfaces are aspherical.

[0203] The sixth lens element E6, 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 sixth lens element E6 is made of plastic material and both its object-side and image-side surfaces are aspherical. The image-side surface of the sixth lens element E6 has two inflection points. The object-side surface of the sixth lens element E6 and the image-side surface of the fifth lens element E5 are cemented together.

[0204] 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 an inflection point. The image-side surface of the seventh lens element E7 has an 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.

[0205] 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 lens system used for imaging. The IS image sensor is located on or near the image surface IMG of the optical lens system used for imaging.

[0206] In the 9th embodiment, the fifth lens element E5 and the sixth lens element E6 are cemented together to form a cemented lens set (whose reference numeral is omitted), and the image-side surface of the fifth lens element E5 and the object-side surface of the sixth lens element E6 are both aspherical surfaces and cemented surfaces that are cemented together.

[0207] The detailed optical data of the 9th embodiment are shown in Table 9A and the aspherical surface data are shown in Table 9B below. TABLE 9A 9. Design f = 0.96 mm, Fno = 1.86, HFOV = 99.7 degrees Surface# radius of curvature thickness material index Abbe# Focal length 0 object infinity infinity 1 Lens 1 7,8818 (SPH) 0,837 Glass 2,001 25,4 -5,50 2 3,0686 (SPH) 2,092 3 Lens 2 -2,7454 (ASP) 0,738 plastic 1,544 56,0 -3,54 4 7,0821 (ASP) 0,997 5 Lens 3 -7,8262 (ASP) 2,055 plastic 1,705 14,0 -34,65 6 12,7673 (ASP) 0,227 7 Aperture Plano -0,159 8 Lens 4 4,2800 (ASP) 0,667 Glass 1,847 23,8 3,30 9 -7,4417 (ASP) 0,592 10 Ape.-Blender Plano -0,037 11 Lens 5 1,9764 (ASP) 1,546 plastic 1,544 56,0 1,07 12 -0,5954 (ASP) 0,026 putty 1,485 53,2 - 13 Lens 6 -0,6163 (ASP) 0,887 plastic 1,669 19,5 -1,57 14 -2,3412 (ASP) -0,041 15 Aperture Plano 0,190 16 Lens 7 9,5156 (ASP) 0,344 plastic 1,639 23,5 -5,86 17 2,6482 (ASP) 0,400 18 filter Plano 0,210 Glass 1,517 64,2 - 19 Plano 0,238 20 Picture Plano - Note: Reference wavelength is 587.6 nm (d-line). An effective radius of aperture S1 (surface 7) is 1.114 mm. An effective radius of aperture S2 (surface 15) is 1,110 mm. TABLE 9B Aspheric coefficients Surface # 3 4 5 6 k = -2,97390E+01 6,04273E+00 8,08403E+00 -9,90000E+01 A4 = 4,3272507E-02 1,6347276E-01 -4,5769813E-02 1,5294401E-02 A6 = -1,8265710E-02 -1,1992372E-01 -1,1661371E-02 -1,4799016E-02 A8 = 4,9653117E-03 4,4327198E-02 1,8405722E-02 1,7675802E-02 A10 = -7,5051175E-04 1,9157183E-02 -3,9823314E-03 -4,9863430E-03 A12 = 4,7129194E-05 -3,2285689E-02 -1,6609021E-03 -6,4800306E-04 A14 = 2,3952522E-06 1,7034811E-02 8,7184225E-04 1,3022773E-03 A16 = -5,5164337E-07 -4,0854888E-03 -1,1246900E-04 -3,5455865E-04 A18 = 2,4669139E-08 3,6195204E-04 - - Surface # 8 9 11 12 k = 5,39641E+00 1,21899E+01 1,27652E+00 -8,35429E-01 A4 = 5,2439100E-02 4,3726400E-02 -9,2489148E-03 -4,7015296E-02 A6 = -3,6806200E-02 -3,6879000E-02 4,5415781E-02 3,3447364E+00 A8 = 1,5096500E-02 1,5501800E-02 -3,5125254E-01 -2,1053100E+01 A10 = -3,2575900E-03 -2,7599000E-03 8,2342789E-01 4,7865141E+01 A12 = 3,2080400E-04 3,6492800E-04 -1,0298517E+00 -4,6566475E+01 A14 = - - 6,5018456E-01 1,6616469E+01 A16 = - - -1,6788133E-01 - Surface # 13 14 16 17 k = -1,03615E+00 -2,15245E+00 5,35184E+01 -1,64952E+00 A4 = -2,6272732E-01 6,1749232E-02 -1,3451489E-01 5,9530264E-02 A6 = 1,4734167E+00 -1,1976804E-01 5,0683116E-01 -4,0885779E-01 A8 = -8,4160359E+00 2,5573724E-01 -3,0014092E+00 5,7917974E-01 A10 = 1,9065298E+01 -2,4893472E-01 8,4591689E+00 -4,5137531E-01 A12 = -1,8487193E+01 1,6061984E-01 -1,3796482E+01 1,9726302E-01 A14 = 6,5828090E+00 -6,9335631E-02 1,3888486E+01 -3,7749516E-02 A16 = - 1,2148563E-02 -8,5395428E+00 -3,5388931E-03 A18 = - - 2,9455309E+00 2,6885814E-03 A20 = - - -4,3849953E-01 -3,1059348E-04

[0208] In the 9th embodiment, the equation for the aspherical surface profiles of the aforementioned lens elements is the same as the equation for the 1st embodiment. The definitions of these parameters, listed in Table 9C below, are also the same as those given for the 1st embodiment, with corresponding values ​​for the 9th embodiment; therefore, no further explanation is given in this regard.

[0209] Furthermore, these parameters from Table 9A and Table 9B can be calculated as the following values ​​and must meet the following conditions: TABLE 9C Values ​​of the optical and physical parameters / definitions f [mm] 0,96 CT1 / CT6 0,94 Fno 1,86 T12 / CT2 2,83 HFOV [Grade] 99,7 T34 / T12 0,03 FOV [degrees] 199,4 BL / CT3 0,41 TL / lmgH 6,24 T45 / CT5 0,36 f2 / f7 0,60 CT7 / CT6 0,39 f56 / f1 -0,57 CTp / CTn 1,74 |f56 / f4| 0,96 |Drsr9| / |Drsr8| 0,06 f / R5 -0,12 (V1+V7) / V2 0,87 R1 / R8 -1,06 V7 23,5 R12 / R3 0,85 ET5 / ET7 1,35 R9 / R4 0,28 Y3R2 / Y1 R1 0,22 |R10+R11| / |R4| 0,17 |SAG7R1| / T67 0,72 |R10 / R5| 0,08 - - 10. Design

[0210] 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 lens system for imaging (whose reference numeral is omitted) of the present disclosure and an image sensor IS. The optical lens system for imaging comprises, in the order from an object side to an image side along a beam path, a first lens element E1, a second lens element E2, a third lens element E3, an aperture S1, a fourth lens element E4, an aperture diaphragm ST, a fifth lens element E5, a sixth lens element E6, an aperture S2, a seventh lens element E7, a filter E8, and an image surface IMG. The optical lens system for imaging 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.

[0211] The first lens element E1 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 first lens element E1 is made of glass and both its object-side and image-side surfaces are spherical.

[0212] 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 also concave 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 six inflection points. The image-side surface of the second lens element E2 has one inflection point. The object-side surface of the second lens element E2 has a critical point in an off-axis region.

[0213] 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. The image-side surface of the third lens element E3 has a critical point in an off-axis region.

[0214] 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 glass 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.

[0215] The fifth lens element E5, 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 fifth lens element E5 is made of plastic material and both its object-side and image-side surfaces are aspherical.

[0216] 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 and the image-side surface of the fifth lens element E5 are cemented together.

[0217] 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.

[0218] 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 lens system used for imaging. The IS image sensor is located on or near the image surface IMG of the optical lens system used for imaging.

[0219] In the 10th embodiment, the fifth lens element E5 and the sixth lens element E6 are cemented together to form a cemented lens set (whose reference numeral is omitted), and the image-side surface of the fifth lens element E5 and the object-side surface of the sixth lens element E6 are both aspherical surfaces and cemented surfaces that are cemented together.

[0220] The detailed optical data of the 10th embodiment are shown in Table 10A and the aspherical surface data are shown in Table 10B below. TABLE 10A 10. Design f = 0.59 mm, Fno = 2.09, HFOV = 86.1 degrees Surface# radius of curvature thickness material index Abbe# Focal length 0 object infinity infinity 1 Lens 1 7,1458 (SPH) 0,805 Glass 1,904 31,4 -9,01 2 3,6024 (SPH) 2,239 3 Lens 2 -2,3815 (ASP) 0,849 plastic 1,544 56,0 -1,96 4 2,1810 (ASP) 1,483 5 Lens 3 14,9604 (ASP) 1,803 plastic 1,705 14,0 -12,92 6 24,4358 (ASP) 0,157 7 Aperture Plano -0,107 8 Lens 4 2,9072 (ASP) 0,798 Glass 1,954 32,3 2,16 9 -6,1072 (ASP) 0,699 10 Ape.-Blender Plano 0,018 11 Lens 5 1,7069 (ASP) 0,551 plastic 1,705 14,0 -2,51 12 0,7528 (ASP) 0,032 putty 1,485 53,2 - 13 Lens 6 0,5930 (ASP) 0,851 plastic 1,511 56,8 0,96 14 -1,4825 (ASP) -0,151 15 Aperture Plano 0,301 16 Lens 7 10,5201 (ASP) 0,321 plastic 1,566 37,4 -4,97 17 2,1942 (ASP) 0,220 18 filter Plano 0,200 Glass 1,517 64,2 - 19 Plano 0,129 20 Picture Plano - Note: Reference wavelength is 587.6 nm (d-line). An effective radius of aperture S1 (surface 7) is 1,210 mm. An effective radius of aperture S2 (surface 15) is 0.900 mm. TABLE 10B Aspheric coefficients Surface # 3 4 5 6 k = -9,90000E+01 -6,07058E-01 -9,90000E+01 9,90000E+01 A4 = 1,3000273E-01 4,5422595E-01 -3,9672738E-02 -3,8382580E-02 A6 = -8,5948108E-02 -6,2273906E-01 -5,8121211E-02 8,8682494E-03 A8 = 2,8772231E-02 4,3623045E-01 1,0388227E-01 7,4058678E-03 A10 = -5,6696795E-03 -1,9054742E-01 -7,6158781E-02 -6,9417393E-03 A12 = 6,8922635E-04 5,6018759E-02 3,0236965E-02 3,4876230E-03 A14 = -5,0945000E-05 -9,8150716E-03 -6,3841316E-03 -1,6852118E-03 A16 = 2,1013912E-06 7,1694389E-04 5,6193481E-04 3,6035827E-04 A18 = -3,7103980E-08 - - - Surface # 8 9 11 12 k = -6,01556E+00 7,86179E+00 -6,45214E+00 -5,89569E-01 A4 = 3,0885800E-02 4,3427900E-02 2,3096170E-01 -2,5011644E-02 A6 = -2,8413100E-02 -3,2571000E-02 -1,5726407E+00 -1,0842743E+00 A8 = 2,0416600E-02 1,2670800E-02 1,7822131E+01 2,6452183E+01 A10 = -9,2767300E-03 -4,5981800E-03 -1,1618609E+02 -1,4394886E+02 A12 = 3,2080400E-04 3,6492800E-04 3,8062569E+02 3,1844696E+02 A14 = - - -4,8662811E+02 -2,5647157E+02 Surface # 13 14 16 17 k = -1,65729E+00 -1,48251E+00 6,87298E+01 -4,15512E-01 A4 = -3,0982344E+00 -2,1591434E-01 -1,3805055E+00 2,3595254E-01 A6 = 1,8446432E+01 4,5327954E-01 5,6326837E+00 -2,8088997E+00 A8 = 1,2239120E+01 2,3337377E+00 -3,2031547E+01 8,1957097E+00 A10 = -3,1686344E+02 -1,4012446E+01 1,3787081E+02 -1,3929958E+01 A12 = 8,1869163E+02 3,1899771E+01 -3,7989738E+02 1,5093658E+01 A14 = -6,6606954E+02 -3,1840136E+01 6,5120002E+02 -1,0549788E+01 A16 = - 1,1376142E+01 -6,6990397E+02 4,5878557E+00 A18 = - - 3,7876010E+02 -1,1209734E+00 A20 = - - -9,0766042E+01 1,1602887E-01

[0221] 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 these parameters, listed in Table 10C below, are also the same as in the 1st embodiment, with corresponding values ​​for the 10th embodiment; therefore, no further explanation is given in this regard.

[0222] Furthermore, these parameters from Table 10A and Table 10B can be calculated as the following values ​​and must meet the following conditions: TABLE 10C Werte der optischen und physikalischen Parameter / Definitionen f [mm] 0,59 CT1 / CT6 0,95 Fno 2,09 T12 / CT2 2,64 HFOV [Grad] 86,1 T34 / T12 0,02 FOV [Grad] 172,2 BL / CT3 0,30 TL / lmgH 6,87 T45 / CT5 1,30 f2 / f7 0,40 CT7 / CT6 0,38 f56 / f1 -0,24 CTp / CTn 1,54 |f56 / f4| 1,01 |Drsr9| / |Drsr8| 0,03 f / R5 -0,04 (V1+V7) / V2 1,23 R1 / R8 -1,17 V7 37,4 R12 / R3 0,62 ET5 / ET7 1,90 R9 / R4 0,78 Y3R2 / Y1 R1 0,23 |R10+R11| / |R4| 0,62 |SAG7R1| / T67 1,70 |R10 / R5| 0,05 - - 11. Design

[0223] Fig. Figure 21 is a perspective view of an image acquisition unit according to the 11th 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 lens system for imaging disclosed in the 1st embodiment, a tube, and a retaining element (whose reference numerals have been omitted) for holding the optical lens system for imaging. However, the lens unit 101 can alternatively be provided with the optical lens system for imaging 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 another electronic component for further processing.

[0224] The drive unit 102 can have an autofocus function and can use various drive configurations, such as voice coil motors (VCMs), microelectromechanical systems (MEMS), piezoelectric systems, and shape memory alloys. The drive unit 102 is advantageous for achieving a better image position for the lens unit 101, enabling the lens unit 101 to capture a clear image of the object at different object distances. The image sensor 103 (e.g., CMOS or CCD), which can be characterized by high light sensitivity and low noise, is positioned on the image surface of the optical lens system for imaging to achieve higher image quality.

[0225] 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 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, thus improving image quality in dynamic or low-light scenarios. 12. Design

[0226] Fig. Figure 22 is a perspective view of an electronic device according to the 12th embodiment of the present disclosure, Fig. Figure 23 is another perspective view of the electronic device in Fig. 22 and Fig. 24 is a block diagram of the electronic device in Fig. 22.

[0227] In this embodiment, an electronic device 200 is a smartphone comprising the image acquisition unit 100 according to the 11th embodiment, an image acquisition unit 100a, an image acquisition unit 100b, an image acquisition unit 100c, an image acquisition unit 100d, a flash module 201, a focusing aid module 202, an image signal processor 203, a display module 204, and an image software processor 205. The image acquisition unit 100 and the image acquisition unit 100a are arranged on the same side of the electronic device 200, and each of the image acquisition units 100 and 100a has a single focal point. The focusing aid module 202 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 100b, the image acquisition unit 100c, the image acquisition unit 100d, and the display module 204 are arranged on the opposite side of the electronic device 200, and the display module 204 can be a user interface that allows the image acquisition units 100b, 100c, and 100d to function as front cameras 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, 100c, and 100d can include the optical lens system for imaging of the present disclosure and have a similar configuration to the image acquisition unit 100. Specifically, each of the image acquisition units 100a, 100b, 100c, and 100d can include a lens unit, a drive device, an image sensor, and an image stabilizer.Furthermore, each lens unit of the image acquisition units 100a, 100b, 100c and 100d can comprise the optical lens system for imaging according to the present disclosure, a tube and a retaining element for holding the optical lens system.

[0228] Image acquisition unit 100 is an ultra-wide-angle image acquisition unit, image acquisition unit 100a is a wide-angle image acquisition unit, image acquisition unit 100b is a wide-angle image acquisition unit, image acquisition unit 100c is an ultra-wide-angle image acquisition unit, and image acquisition unit 100d is a time-of-flight (ToF) image acquisition unit. In this embodiment, image acquisition units 100 and 100a have different fields of view, so that the electronic device 200 can have different magnification ratios to meet the requirements of the optical zoom function. In addition, image acquisition unit 100d can determine depth information of the imaged object. In this embodiment, the electronic device 200 comprises multiple image acquisition units 100, 100a, 100b, 100c, and 100d, but the present disclosure is not limited to the number and arrangement of the image acquisition units.

[0229] When a user takes pictures of an object 206, the light beams are focused in the image acquisition unit 100 or image acquisition unit 100a to create images, and the flash module 201 is activated for light assistance. The focus assist module 202 detects the distance of the imaged object 206 to achieve fast autofocus. The image signal processor 203 is designed to optimize the captured image to improve image quality. The light beam emitted by the focus assist module 202 can be either conventional infrared light or laser light. Furthermore, the light beams can be focused in the image acquisition unit 100b, 100c, or 100d to create images. The display module 204 can include a touchscreen, and the user can interact with the display module 204 and the multi-functional image software processor 205 to capture images and perform image processing.Alternatively, the user can take pictures using a physical button. The image processed by the image software processor 205 can be displayed on the display module 204. 13. Design

[0230] Fig. Figure 25 is a schematic view of an electronic device according to the 13th embodiment of the present disclosure, and Fig. Figure 26 shows another schematic view of the electronic device in Fig. 25.

[0231] In this embodiment, an electronic device 300 is a smartphone comprising the image acquisition unit 100, an image acquisition unit 100e, an image acquisition unit 100f, an image acquisition unit 100g, and a display module 301 disclosed in the 11th embodiment. As in Fig. As shown in Figure 25, the image acquisition unit 100, the image acquisition unit 100e, and the image acquisition unit 100f are arranged on the same side of the electronic device 300, and each of the image acquisition units 100, 100e, and 100f has a single focal point. As shown in Fig. As shown in Figure 26, the image acquisition unit 100g and the display module 301 are arranged on the opposite side of the electronic device 300, so that the image acquisition unit 100g can serve as the front camera of the electronic device 300 for taking selfies, although the present disclosure is not limited to this use. Furthermore, each of the image acquisition units 100e, 100f, and 100g can comprise the optical lens system for imaging of the present disclosure and have a similar configuration to the image acquisition unit 100. Specifically, each of the image acquisition units 100e, 100f, and 100g can comprise a lens unit, a drive device, an image sensor, and an image stabilizer. In addition, each lens unit of the image acquisition units 100e, 100f, and 100g can comprise the optical lens system for imaging of the present disclosure, a tube, and a retaining element for holding the optical lens system for imaging.

[0232] The ultra-wide-angle image capture unit 100 is an ultra-wide-angle image capture unit, the image capture unit 100e is a wide-angle image capture unit, the image capture unit 100f is a telephoto image capture unit, and the image capture unit 100g is a wide-angle image capture unit. In this embodiment, the image capture units 100, 100e, and 100f have different fields of view, so that the electronic device can have 300 different magnification ratios to meet the requirements of the optical zoom function. Furthermore, the image capture unit 100g, as shown in Fig. As shown in Figure 26, the image acquisition unit 100g has a non-circular opening, and the tube or lens elements in the image acquisition unit 100g may have clipped edges at their outermost positions to conform to the shape of the non-circular opening. Therefore, it is advantageous to reduce the size of the image acquisition unit 100g, thereby increasing the ratio of the area of ​​the display module 301 to that of the electronic device 300 and reducing the thickness of the electronic device 300, thus achieving a compact design. In this embodiment, the electronic device 300 comprises several image acquisition units 100, 100e, 100f, and 100g, but the present disclosure is not limited to the number and arrangement of the image acquisition units. 14. Design

[0233] Fig. Figure 27 is a perspective view of an electronic device according to the 14th embodiment of the present disclosure.

[0234] 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 11th embodiment. The image acquisition units 100, 100h, and 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 lens system for imaging of the present disclosure and have a similar configuration to the image acquisition unit 100, the details of which are not repeated here.

[0235] Image acquisition unit 100 is an ultra-wide-angle image acquisition unit, image acquisition unit 100h is a wide-angle image acquisition unit, and image acquisition unit 100i is a telephoto image acquisition unit. In this embodiment, 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, image acquisition unit 100i is a telephoto image acquisition unit configured with an optical beam deflection element, so that the overall path length of image acquisition unit 100i is not limited by the thickness of the electronic device 400. In this embodiment, the electronic device 400 comprises multiple 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, the light beams are focused in the image capture unit 100, 100h, or 100i to produce images, and the flash module 401 is activated to provide additional light. Furthermore, the subsequent processes are carried out in a similar manner to the embodiments described above, and the details thereof are not repeated. 15. Design

[0236] Fig. Figure 28 is a perspective view of an electronic device according to the 15th embodiment of the present disclosure.

[0237] 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 11th 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 lens system for imaging of the present disclosure and have a similar configuration to the image acquisition unit 100, without the details relating thereto being specified again.

[0238] The image acquisition unit 100 is an ultra-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 an ultra-wide-angle image acquisition unit, the image acquisition unit 100n is a wide-angle image acquisition unit, the image acquisition unit 100p is a 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 image acquisition units 100j and 100k is a telephoto image acquisition unit configured with a beam path deflection element, whereby the total path length of the image acquisition units 100j and 100k is not limited by the thickness of the electronic device 500. Additionally, 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 in the image capture unit 100, 100j, 100k, 100m, 100n, 100p, 100q, 100r or 100s are focused to create images, and the flash module 501 is activated to provide additional light.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. 16. Design

[0239] Fig. Figure 29 is a perspective view of an electronic device according to the 16th embodiment of the present disclosure, and Fig. 30 is a top view of the electronic device in Fig. 29.

[0240] In this embodiment, the electronic device 600 is a vehicle (e.g., an automobile). The electronic device 600 comprises a plurality of image acquisition units 601, and each image acquisition unit 601 comprises the optical lens system for imaging as described in this disclosure. The image acquisition units 601 can, for example, serve as panoramic car cameras, dashboard cameras, and vehicle reversing cameras. The image acquisition units 601 are, for example, wide-angle image acquisition units or ultra-wide-angle image acquisition units.

[0241] As in Fig. 29 to Fig. As shown in Figure 30, the image acquisition units 601 are, for example, positioned at the front, rear, sides, rearview mirrors, and inside the vehicle to capture images of the vehicle's surroundings. This is advantageous for recognizing external road conditions and thus enabling the implementation of automatic driver assistance functions. Furthermore, the images can be processed by an image software processor to create a panoramic view that provides the driver with images of blind spots, allowing the driver to observe the vehicle's surroundings, which is beneficial for driving and parking.

[0242] As in Fig. As shown in Figure 30, the image acquisition units 601 can, for example, also be arranged at the lower part of the side mirrors and within the front and rear windshields to provide the driver with external information and also to offer a wider field of view, thereby reducing blind spots and improving driving safety. The configuration and arrangement of the image acquisition units shown in the figures is only exemplary. The number, position, and image acquisition direction of the image acquisition units can be adapted according to actual requirements. 17. Design

[0243] Fig. Figure 31 is a perspective view of an electronic device according to the 17th embodiment of the present disclosure.

[0244] In this embodiment, an electronic device 700 is a lightweight unmanned aerial vehicle (e.g., a drone camera). The electronic device 700 comprises an image acquisition unit 701. The image acquisition unit 701 includes the optical lens system for imaging as described in this disclosure, and the image acquisition unit 701 may be an ultra-wide-angle image acquisition unit. The image acquisition unit 701, which is similar to the image acquisition unit 100 disclosed in the 11th embodiment, may further comprise a tube, a mounting element, or a combination thereof. The electronic device 700 captures an image using the image acquisition unit 701. Preferably, the electronic device 700 may further comprise a control unit, a display unit, a storage unit, a random-access memory (RAM) unit, or a combination thereof.In this embodiment, the electronic device 700 includes, by way of example, a single image acquisition unit 701, but the present disclosure is not limited to the number and arrangement of image acquisition units.

[0245] The smartphones, vehicles, and unmanned aerial vehicles in the embodiments serve only as examples to illustrate the image acquisition unit installed in an electronic device according to the present disclosure, and the present disclosure is not limited to them. The image acquisition unit can optionally be applied to optical systems with a moving focus. Furthermore, the optical lens system for imaging by the image acquisition unit is characterized by good aberration and high image quality and can be used for 3D (three-dimensional) image acquisition applications 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, portable video recorders, and other electronic imaging devices.

[0246] The foregoing description has been provided for illustrative purposes with reference to specific embodiments. It should be noted that TABLES 1A-10C 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 various embodiments with different modifications suitable for their respective intended uses. The embodiments shown above and the accompanying drawings are exemplary and are neither intended to be exhaustive nor to limit the scope of this disclosure to the forms exactly disclosed. In view of the above teachings, many modifications and variations are possible.

Claims

[1] Optical lens system for imaging, comprising seven lens elements (E1, E2, E3, E4, E5, E6 and E7), wherein the seven lens elements (E1, E2, E3, E4, E5, E6 and E7) are arranged in order 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), wherein each of the seven lens elements (E1, E2, E3, E4, E5, E6 and 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 third lens element (E3) is concave in a paraxial region thereof, the image-side surface of the sixth lens element (E6) is convex in a paraxial region thereof, and the image-side surface of the seventh lens element (E7) has at least one inflection point (P); wherein the optical lens system for imaging further comprises an aperture diaphragm (ST) arranged between the fourth lens element (E4) and the fifth lens element (E5); and where an axial distance between the image-side surface of the seventh lens element (E7) and an image surface (IMG) BL is, a central thickness of the first lens element (E1) CT1 is, a central thickness of the third lens element (E3) CT3 is, a central thickness of the sixth lens element (E6) CT6 is, an f-number of the optical lens system Fno is, the focal length of the first lens element (E1) f1 is, a combined focal length of the fifth lens element (E5) and the sixth lens element (E6) is f56, and the following conditions are satisfied: 0.10 <BL / CT3<1,40; 1.30 <Fno<2,15; -1.10 <f56 / f1<0; and 0.10 <CT1 / CT6<2,20. [2] Optical lens system for imaging according to claim 1, wherein the first lens element (E1) has a negative refractive power, the second lens element (E2) has a negative refractive power, the object-side surface of the first lens element (E1) is convex in a paraxial region thereof, the image-side surface of the first lens element (E1) is concave in a paraxial region thereof, the image-side surface of the second lens element (E2) is concave in a paraxial region thereof, the image-side surface of the fourth lens element (E4) is convex in a paraxial region thereof, the object-side surface of the fifth lens element (E5) is convex in a paraxial region thereof, and the image-side surface of the seventh lens element (E7) has at least one critical point (C) in an off-axis region thereof. [3] Optical lens system for imaging according to claim 1, wherein the axial distance between the image-side surface of the seventh lens element (E7) and the image surface (IMG) is BL, the central thickness of the third lens element (E3) is CT3, an axial distance between the aperture diaphragm (ST) and the image-side surface of the fourth lens element (E4) is Drsr8, an axial distance between the aperture diaphragm (ST) and the object-side surface of the fifth lens element (E5) is Drsr9, and the following conditions are met: 0.20 <BL / CT3<1,10; and 0<|Drsr9| / |Drsr8|<1,00. [4] Optical lens system for imaging according to claim 1, wherein the f-number of the optical lens system is Fno, the axial distance between the fourth lens element (E4) and the fifth lens element (E5) is T45, the central thickness of the fifth lens element (E5) is CT5 and the following conditions are met: 1.50 <Fno<2,00; and 0 <T45 / CT5<4,00. [5] Optical lens system for imaging according to claim 1, wherein the focal length of the first lens element (E1) is f1, the combined focal length of the fifth lens element (E5) and the sixth lens element (E6) is f56, a radius of curvature of the object-side surface of the second lens element (E2) is R3, a radius of curvature of the image-side surface of the sixth lens element (E6) is R12 and the following conditions are met: -0.80 <f56 / f1<−0,08; and -0.30 <R12 / R3<2,80. [6] Optical lens system for imaging according to claim 1, wherein the central thickness of the first lens element (E1) is CT1, the central thickness of the second lens element (E2) is CT2, the central thickness of the sixth lens element (E6) is CT6, the axial distance between the first lens element (E1) and the second lens element (E2) is T12 and the following conditions are met: 0.25 <CT1 / CT6<1,05; and 1.50 <T12 / CT2<4,50. [7] Optical lens system for imaging according to claim 1, wherein an Abbe number of the first lens element (E1) is V1, an Abbe number of the second lens element (E2) is V2, an Abbe number of the seventh lens element (E7) is V7 and the following condition is satisfied: 0.45<(V1+V7) / V2<1.

40. [8] Optical lens system for imaging according to claim 1, wherein the fifth lens element (E5) and the sixth lens element (E6) are cemented together to form a cemented lens set; and where a central thickness of a positive lens element in the cemented lens set is CTp, a central thickness of a negative lens element in the cemented lens set is CTn, and the following condition is met: 0.80 <CTp / CTn<4,20. [9] Optical lens system for imaging according to claim 1, wherein the central thickness of the sixth lens element (E6) is CT6, the central thickness of the seventh lens element (E7) is CT7, the radius of curvature of the object-side surface of the first lens element (E1) is R1, the radius of curvature of the image-side surface of the fourth lens element (E4) is R8 and the following conditions are met: 0 <CT7 / CT6<1,00; and -2.50 <R1 / R8<−0,70. [10] Optical lens system for imaging according to claim 1, wherein a radius of curvature of the image-side surface of the second lens element (E2) is R4, a radius of curvature of the object-side surface of the fifth lens element (E5) is R9 and the following condition is met: 0 <R9 / R4<1,80. [11] Optical lens system for imaging according to claim 1, wherein a maximum effective radius of the object-side surface of the first lens element (E1) is Y1R1, a maximum effective radius of the image-side surface of the third lens element (E3) is Y3R2 and the following condition is met: 0.05 <Y3R2 / Y1R1<0,50. [12] Image capture unit (1, 100) comprising the following: the optical lens system for imaging according to claim 1; and an image sensor (IS, 103) which is arranged on the image surface (IMG) of the optical lens system for imaging. [13] Optical lens system for imaging, comprising seven lens elements (E1, E2, E3, E4, E5, E6 and E7), wherein the seven lens elements (E1, E2, E3, E4, E5, E6 and E7) are arranged in order 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), wherein each of the seven lens elements (E1, E2, E3, E4, E5, E6 and E7) has an object-side surface facing the object side and an image-side surface facing the image side; wherein the first lens element (E1) has a negative refractive power, the object-side surface of the first lens element (E1) is convex in a paraxial region thereof, the image-side surface of the first lens element (E1) is concave in a paraxial region thereof, the object-side surface of the third lens element (E3) is concave in a paraxial region thereof, the object-side surface of the fifth lens element (E5) is convex in a paraxial region thereof, the image-side surface of the sixth lens element (E6) is convex in a paraxial region thereof, and the image-side surface of the seventh lens element (E7) has at least one inflection point (P); wherein the optical lens system for imaging further comprises an aperture diaphragm (ST) arranged between the fourth lens element (E4) and the fifth lens element (E5); and where BL is an axial distance between the image-side surface of the seventh lens element (E7) and an image surface (IMG), CT3 is a central thickness of the third lens element (E3), V7 is an Abbe number of the seventh lens element (E7), HFOV is half of a maximum field of view of the optical lens system for imaging, and the following conditions are met: 0.15 <BL / CT3<1,20; 5.0 <V7<45,0; and 85.0 degrees <HFOV<110,0 Grad. [14] Optical lens system for imaging according to claim 13, wherein the second lens element (E2) has a negative refractive power, the image-side surface of the second lens element (E2) is concave in a paraxial region thereof, the image-side surface of the fourth lens element (E4) is convex in a paraxial region thereof, and the object-side surface of the second lens element (E2) has at least one inflection point (P); and where the axial distance between the first lens element (E1) and the second lens element (E2) is T12, the central thickness of the second lens element (E2) is CT2, and the following condition is met: 1.60 <T12 / CT2<4,00. [15] Optical lens system for imaging according to claim 13, wherein half of a maximum field of view of the optical lens system for imaging is HFOV, a radius of curvature of the image-side surface of the second lens element (E2) is R4, 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 conditions are met: 90 degrees <HFOV<105 Grad; and 0<|R10+R11| / |R4|<1,60. [16] Optical lens system for imaging according to claim 13, wherein the focal length of the fourth lens element (E4) is f4, a combined focal length of the fifth lens element (E5) and the sixth lens element (E6) is f56 and the following condition is met: 0<|f56 / f4|<1,30. [17] Optical lens system for imaging according to claim 13, wherein a central thickness of the first lens element (E1) is CT1, a central thickness of the sixth lens element (E6) is CT6, the focal length of the optical lens system for imaging is f, a radius of curvature of the object-side surface of the third lens element (E3) is R5 and the following conditions are met: 0.20 <CT1 / CT6<2,10; and -0.40 <f / R5<0. [18] Optical lens system for imaging according to claim 13, wherein an Abbe number of the first lens element (E1) is V1, an Abbe number of the second lens element (E2) is V2, the Abbe number of the seventh lens element (E7) is V7, a radius of curvature of the object-side surface of the third lens element (E3) is R5, a radius of curvature of the image-side surface of the fifth lens element (E5) is R10 and the following conditions are met: 0.40<(V1+V7) / V2<1.50; and 0<|R10 / R5|<0.

80. [19] Optical lens system for imaging according to claim 13, wherein a radius of curvature of the image-side surface of the second lens element (E2) is R4, a radius of curvature of the object-side surface of the fifth lens element (E5) is R9, the focal length of the second lens element (E2) is f2, the focal length of the seventh lens element (E7) is f7 and the following conditions are met: 0.03 <R9 / R4<1,60; and -0.40 <f2 / f7<1,50. [20] Optical lens system for imaging according to claim 13, wherein the first lens element (E1) is made of glass material; and wherein an axial distance between the first lens element (E1) and the second lens element (E2) is T12, an axial distance between the third lens element (E3) and the fourth lens element (E4) is T34 and the following condition is met: 0 <T34 / T12<0,50. [21] Optical lens system for imaging according to claim 13, wherein the Abbe number of the seventh lens element (E7) is V7 and the following condition is met: 12.0 <V7<30,0. [22] Optical lens system for imaging according to claim 13, wherein the fifth lens element (E5) and the sixth lens element (E6) are cemented together to form a cemented lens set, and the image-side surface of the fifth lens element (E5) and the object-side surface of the sixth lens element (E6) are both aspheric surfaces and cemented surfaces that are cemented together; and where TL is an axial distance between the object-side surface of the first lens element (E1) and the image surface (IMG), ImgH is a maximum image height of the optical lens system for imaging, and the following condition is met: 5.50 <TL / lmgh<7,20. [23] Optical lens system for imaging according to claim 13, wherein a distance parallel to an optical axis between a position of the maximum effective radius of the object-side surface of the fifth lens element (E5) and a position of the maximum effective radius of the image-side surface of the fifth lens element (E5) is ET5, a distance parallel to the optical axis between a position of the maximum effective radius of the object-side surface of the seventh lens element (E7) and a position of the maximum effective radius of the image-side surface of the seventh lens element (E7) is ET7, a displacement parallel to the optical axis from an axial vertex of the object-side surface of the seventh lens element (E7) to the position of the maximum effective radius of the object-side surface of the seventh lens element (E7) is SAG7R1,an axial distance between the sixth lens element (E6) and the seventh lens element (E7) T67 is and the following conditions are met:, 0.40 <ET5 / ET7<3,50; and 0.25<|SAG7R1| / T67<2.

50. [24] Optical lens system for imaging according to claim 13, wherein the axial distance between the image-side surface of the seventh lens element (E7) and the image surface (IMG) is BL, a central thickness of the first lens element (E1) is CT1, the central thickness of the third lens element (E3) is CT3, a central thickness of the sixth lens element (E6) is CT6, an aperture number of the optical lens system for imaging is Fno, a focal length of the first lens element (E1) is f1, a combined focal length of the fifth lens element (E5) and the sixth lens element (E6) is f56, the Abbe number of the seventh lens element (E7) is V7, half of the maximum field of view of the optical lens system for imaging is HFOV, an axial distance between the object-side surface of the first lens element (E1) and the image surface (IMG) is TL, and a maximum image height of the optical lens system for imaging is ImgH. is, and the following conditions are met: 0.30≤BL / CT3≤0.92; 1.70≤Fno≤2.09; −0.57≤f56 / f1≤−0.13; 0.45≤CT1 / CT6≤1.94; 14.0≤V7≤37.4; 86.1 degrees≤HFOV≤100.9 degrees; and 6.05≤TL / lmgh≤6.

87. [25] Electronic device (200) comprising: comprising one image acquisition unit (1, 100): the optical lens system for imaging according to claim 13; and an image sensor (IS, 103) which is arranged on the image surface (IMG) of the optical lens system for imaging.

Images