Optical lens assembly for photography, image capture unit and electronic device

Abstract

An optical lens arrangement for photography comprising three lens elements (E1, E2, E3), wherein the three lens elements (E1, E2, E3) are arranged in the order from the object side to the image side along a ray path as a first lens element (E1), a second lens element (E2) and a third lens element (E3), and each of the three lens elements (E1, E2, E3) has an object-side surface oriented towards the object side and an image-side surface oriented towards the image side; wherein the first lens element (E1) has a positive 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 third lens element (E3) has a negative refractive power, the image-side surface of the third lens element (E3) is concave in a paraxial region thereof, and the image-side surface of the third lens element (E3) has at least one inflection point (P); where the Abbe number of the second lens element (E2) is V2, the Abbe number of the third lens element (E3) is V3, the focal length of the second lens element (E2) is f2, the focal length of the third lens element (E3) is f3, the central thickness of the third lens element (E3) is CT3, the axial distance between the first lens element (E1) and the second lens element (E2) is T12, the radius of curvature of the object-side surface of the third lens element (E3) is R5, the radius of curvature of the image-side surface of the third lens element (E3) is R6, and the following conditions are met: 10.0 < V 2 + V 3 < 70.0 ; 0 < 10 × | f3 / f2 | < 4.50 ; 0.40 < CT 3 / T 12 < 2.50 ; and 0 < (R 5 + R 6 ) / (R 5 − R 6 ) < 2.00.

Description

BACKGROUND Technical area

[0001] The present disclosure relates to an optical lens arrangement for photography, an image acquisition unit and an electronic device, in particular an optical lens arrangement for photography and an image acquisition unit that can be used in an electronic device. Description of the state of the art

[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, thus raising the bar for the functionality of these systems. However, with a conventional optical system, it is difficult to strike a balance between requirements such as high image quality, low sensitivity, appropriate aperture size, miniaturization, and a desirable field of view. SUMMARY

[0004] According to one aspect of the present disclosure, an optical lens arrangement for photography comprises three lens elements. The three lens elements are, in order from the object side to the image side along a ray path, a first lens element, a second lens element, and a third lens element. Each of the three lens elements has an object-side surface oriented towards the object side and an image-side surface oriented towards the image side.

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

[0006] If the Abbe number of the second lens element is V2, the Abbe number of the third lens element is V3, the focal length of the second lens element is f2, the focal length of the third lens element is f3, the central thickness of the third lens element is CT3, the axial distance between the first lens element and the second lens element is T12, a radius of curvature of the object-side surface of the third lens element is R5, and a radius of curvature of the image-side surface of the third lens element is R6, then the following conditions are preferably met: 10.0 <V2+V3<70,00; 0<10×|f3 / f2|<4.50; 0.40 <CT3 / T12<2,50; und 0<(R5+R6) / (R5−R6)<2,00.

[0007] According to another aspect of the present disclosure, an optical lens arrangement for photography comprises three lens elements. The three lens elements are, in order from the object side to the image side along a ray path, a first lens element, a second lens element, and a third lens element. Each of the three lens elements has an object-side surface oriented towards the object side and an image-side surface oriented towards the image side.

[0008] Preferably, the first lens element has a positive 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 third lens element has a negative refractive power. Preferably, the image-side surface of the third lens element is concave in a paraxial region. Preferably, the image-side surface of the third lens element has at least one critical point in an off-axis region.

[0009] If the Abbe number of the second lens element is V2, the Abbe number of the third lens element is V3, the focal length of the optical lens arrangement for photography is f, the focal length of the second lens element is f2, the focal length of the third lens element is f3, and the radius of curvature of the image-side surface of the first lens element is R2, then the following conditions are preferably met: 10.0 <V2+V3<70,00; 0<10×|f3 / f2|<4.50; and 0.80 <f / R2<2,50;

[0010] If the Abbe number of the first lens element is V1, the Abbe number of the second lens element is V2, the Abbe number of the third lens element is V3, an Abbe number of the i-th lens element is Vi, a refractive index of the first lens element is N1, a refractive index of the second lens element is N2, a refractive index of the third lens element is N3, and a refractive index of the i-th lens element is Ni, then at least one lens element of the optical lens arrangement for photography satisfies the following condition: 5.00 <Vi / Ni<14,50, where i = 1, 2 or 3.

[0011] According to another aspect of the present disclosure, an optical lens arrangement for photography comprises three lens elements. The three lens elements are, in order from the object side to the image side along a ray path, a first lens element, a second lens element, and a third lens element. Each of the three lens elements has an object-side surface oriented towards the object side and an image-side surface oriented towards the image side.

[0012] Preferably, the first lens element has a positive 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 third lens element has a negative refractive power. Preferably, the image-side surface of the third lens element is concave in a paraxial region. Preferably, the image-side surface of the third lens element has at least one critical point in an off-axis region.

[0013] If the Abbe number of the second lens element is V2, the Abbe number of the third lens element is V3, the focal length of the second lens element is f2, the focal length of the third lens element is f3, the radius of curvature of the image-side surface of the first lens element is R2, the radius of curvature of the image-side surface of the third lens element is R6, the axial distance between the object-side surface of the first lens element and the image-side surface of the third lens element is TD, and the entrance pupil diameter of the optical lens arrangement for photography is EPD, then the following conditions are preferably met: 10.0 <V2+V3<70,00; 0<10×|f3 / f2|<7.00; 0 <R2 / R6<2,00; und 1.00 <TD / EPD<1,80.

[0014] According to another aspect of the present disclosure, an image acquisition unit comprises one of the above-mentioned optical lens arrangements for photography and an image sensor, wherein the image sensor is arranged on an image surface of the optical lens arrangement for photography.

[0015] According to another aspect of the present disclosure, an electronic device comprises the aforementioned image capture unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] 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 representation 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 perspective view of an image acquisition unit according to the 8th embodiment of the present disclosure; Fig. Figure 16 is a perspective view of an electronic device according to the 9th embodiment of the present disclosure; Fig. Figure 17 is another perspective view of the electronic device in Fig. 16; Fig. Figure 18 is a perspective view of an electronic device according to the 10th embodiment of the present disclosure; Fig. Figure 19 is another perspective view of the electronic device in Fig. 18; Fig. 20 is a block diagram of the electronic device in Fig. 18; Fig.Figure 21 is a perspective view of an electronic device 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 shows a schematic view of inflection points on lens surfaces and critical points on lens surfaces according to the first embodiment of the present disclosure; Fig. Figure 24 shows a schematic view of Sag2R1, Sag2R2 and Y3R2 according to the first embodiment of the present disclosure; Fig. Figure 25 shows a schematic view of a configuration of a refractive element in an optical lens arrangement for photography according to an embodiment of the present disclosure; Fig.Figure 26 shows a schematic view of a further configuration of a refractive element in an optical lens arrangement for photography according to an embodiment of the present disclosure; and Fig. Figure 27 shows a schematic view of a configuration of two refractive elements in an optical lens arrangement for photography according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0017] An optical lens arrangement for photography comprises three lens elements. These three lens elements, in order from the object side to the image side along a ray path, are a first lens element, a second lens element, and a third lens element. Each of the three lens elements has an object-side surface oriented towards the object and an image-side surface oriented towards the image.

[0018] The first lens element can have a positive refractive power. This is advantageous for light convergence and reduces the overall size of the optical lens assembly for photography. The object-side surface of the first lens element can be convex in a paraxial region. This is beneficial for adjusting the direction of light propagation, thereby reducing the overall length of the optical lens assembly for photography. The image-side surface of the first lens element can be concave in a paraxial region. This is advantageous for compensating for the refractive power of the first lens element, thereby improving the convergence of light from different viewing angles onto the image plane and correcting aberrations.

[0019] The object-side surface of the second lens element can be concave in a paraxial region. This is advantageous for adjusting the lens shape and refractive power of the second lens element, thereby improving image quality in the central image. The image-side surface of the second lens element can be convex in a paraxial region. This is advantageous for controlling the direction of light propagation at the edge of the second lens element, thus preventing ineffective light convergence due to insufficient deflection of the marginal light.

[0020] The third lens element can have a negative refractive power. Therefore, it is advantageous for compensating for the refractive power of the lens elements at the image end of the optical lens assembly for photography and for reducing the rear focal length of the optical lens assembly. The object-side surface of the third lens element can be concave in a paraxial region. This is beneficial for adjusting the direction of light incidence into the third lens element, thereby increasing the image area. The image-side surface of the third lens element can also be concave in a paraxial region. This is beneficial for correcting field curvature while simultaneously reducing the rear focal length.

[0021] According to the present disclosure, the image-side surface of the third lens element can have at least one inflection point. Therefore, it is advantageous to improve the aberration correction capability of the third lens element for the edge image. See Fig. , which shows a schematic view of an inflection point P on the image-side surface of the third lens element E3 according to the first embodiment of the present disclosure. The aforementioned inflection point P on the image-side surface of the third lens element E3, as well as the inflection points P on the image-side surface of the first lens element E1, the image-side surface of the second lens element E2, and the object-side surface of the third lens element E3 in Fig. Figures 23 are examples. Each of the lens surfaces in different embodiments of the present disclosure may also have one or more inflection points.

[0022] According to the present disclosure, the image-side surface of the third lens element can have at least one critical point in an off-axis region thereof. This is therefore advantageous for adjusting the angle of incidence of the light onto the image area and controlling the angle of travel of the peripheral light, thereby preventing vignetting at the edge of the image and correcting distortions. See Fig. , which shows a schematic view of a critical point C on the image-side surface of the third lens element E3 according to the first embodiment of the present disclosure. The aforementioned critical points C on the image-side surface of the third lens element E3, as well as the critical points C on the image-side surface of the second lens element E2 and the object-side surface of the third lens element E3 in Fig.Figures 23 are examples. Each of the lens surfaces in different embodiments of the present disclosure may also have one or more critical points in an off-axis region thereof.

[0023] If the Abbe number of the second lens element is V2 and the Abbe number of the third lens element is V3, the following condition can be satisfied: 10.0 < V2+V3 < 70.0. Therefore, a suitable material configuration of the second and third lens elements is advantageous to compensate for the convergence capability for light with different wavelengths. Furthermore, the following conditions can also be satisfied: 20.0 < V2+V3 < 65.0. Furthermore, the following conditions can also be satisfied: 30.0 < V2+V3 < 63.0. Furthermore, the following conditions can also be satisfied: 33.00 < V2+V3 < 62.00. Furthermore, the following condition can also be satisfied: 36.7 ≤ V2+V3 ≤ 60.9.

[0024] If the focal length of the second lens element is f2 and the focal length of the third lens element is f3, the following condition can be satisfied: 0 < 10×|f3 / f2| < 7.00. Therefore, it is advantageous to improve the refractive power configuration of the third lens element, with the second lens element correcting the aberrations caused by the third lens element. Furthermore, the following conditions can also be satisfied: 0 < 10×|f3 / f2| < 4.50. Furthermore, the following conditions can also be satisfied: 0.01 < 10×|f3 / f2| < 3.00. Furthermore, the following conditions can also be satisfied: 0.05 < 10×|f3 / f2| < 2.50. Furthermore, the following conditions can also be satisfied: 0.11 ≤ 10×|f3 / f2| ≤ 3.99.

[0025] If the mean thickness of the third lens element is CT3 and the axial distance between the first and second lens elements is T12, the following condition can be met: 0.40 < CT3 / T12 < 2.50. Therefore, it is advantageous to balance the lens interval of the first and second lens elements and the mean thickness of the third lens element, thereby balancing the spatial arrangements of the lens groups at both the object and image ends of the optical lens arrangement for photography. Furthermore, the following conditions can also be met: 0.60 < CT3 / T12 < 1.75. Additionally, the following conditions can also be met: 0.70 < CT3 / T12 < 1.50. Furthermore, the following condition can also be met: 0.81≤CT3 / T12≤2.10.

[0026] 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 third lens element is R6, the following condition can be satisfied: 0 < (R5+R6) / (R5-R6) < 2.00. Therefore, it is advantageous to effectively balance the radius of curvature of the object-side surface of the third lens element and the radius of curvature of the image-side surface of the third lens element to improve the convergence quality of the imaged light and thereby effectively correct field curvature and spherical aberration. Furthermore, the following condition can also be satisfied: 0.20 < (R5+R6) / (R5-R6) < 1.80. Additionally, the following condition can also be satisfied: 0.37 ≤ (R5+R6) / (R5-R6) ≤ 1.52.

[0027] If the focal length of the optical lens arrangement for photography is f and the radius of curvature of the image-side surface of the first lens element is R2, the following condition can be satisfied: 0.80 < f / R2 < 2.50. Therefore, it is advantageous to adjust the radius of curvature of the image-side surface of the first lens element so that the image-side surface of the first lens element can exhibit a relatively strong light-deflection capability in order to control the beam path and correct aberrations. Furthermore, the following conditions can also be satisfied: 0.90 < f / R2 < 2.30. Furthermore, the following conditions can also be satisfied: 1.00 < f / R2 < 1.80. Furthermore, the following condition can also be satisfied: 1.07 ≤ f / R2 ≤ 2.06.

[0028] If the Abbe number of the first lens element is V1, the Abbe number of the second lens element is V2, the Abbe number of the third lens element is V3, the Abbe number of the i-th lens element is Vi, the refractive index of the first lens element is N1, the refractive index of the second lens element is N2, the refractive index of the third lens element is N3, and the refractive index of the i-th lens element is Ni, then at least one lens element of the optical lens arrangement for photography can satisfy the following condition: 5.00 < Vi / Ni < 14.50, where i = 1, 2, or 3. This is advantageous for improving the dispersion capability of the optical lens used, thereby correcting excessive deflection of short-wavelength light. Furthermore, at least one lens element of the optical lens arrangement for photography can also satisfy the following condition: 8.00 < Vi / Ni < 12.50, where i = 1, 2, or 3.Furthermore, at least one lens element of the optical lens arrangement for photography can also satisfy the following condition: 9.00 < Vi / Ni < 12.00, where i = 1, 2, or 3. Furthermore, at least one lens element of the optical lens arrangement for photography can also satisfy the following condition: 9.61 ≤ Vi / Ni ≤ 14.34, where i = 1, 2, or 3.

[0029] If the radius of curvature of the image-side surface of the first lens element is R2 and the radius of curvature of the image-side surface of the third lens element is R6, the following condition can be satisfied: 0 < R2 / R6 < 2.00. Therefore, it is advantageous to effectively balance the radius of curvature of the image-side surface of the first lens element and the radius of curvature of the image-side surface of the third lens element, thereby improving the convergence quality of the peripheral light. Furthermore, the following conditions can also be satisfied: 0.50 < R2 / R6 < 1.75. Additionally, the following conditions can also be satisfied: 0.60 < R2 / R6 < 1.60. Furthermore, the following condition can also be satisfied: 0.69 ≤ R2 / R6 ≤ 1.50.

[0030] If the axial distance between the object-side surface of the first lens element and the image-side surface of the third lens element is TD, and the entrance pupil diameter of the optical lens arrangement for photography is EPD, the following condition can be met: 1.00 < TD / EPD < 1.80. Therefore, it is advantageous to balance the size of the lens element and the amount of incident light to achieve a suitable equilibrium between the overall lens size and the illuminance at the edge. Furthermore, the following condition can also be met: 1.30 < TD / EPD < 1.75. Additionally, the following condition can also be met: 1.56≤TD / EPD≤1.68.

[0031] If the focal length of the optical lens arrangement for photography is f, and the radius of curvature of the object-side surface of the second lens element is R3 and the radius of curvature of the image-side surface of the second lens element is R4, the following condition can be satisfied: 0.30 < |f / R3| + |f / R4| < 1.00. Therefore, it is advantageous to effectively balance the radius of curvature of the object-side surface of the second lens element and the radius of curvature of the image-side surface of the second lens element to adjust the direction of propagation of the peripheral light, thereby correcting the astigmatism of the optical lens arrangement for photography and reducing stray light in the optical lens. Furthermore, the following condition can also be satisfied: 0.40 < |f / R3| + |f / R4| < 0.90.

[0032] If the radius of curvature of the image-side surface of the first lens element is R2 and the radius of curvature of the object-side surface of the second lens element is R3, the following condition can be satisfied: -3.00 < (R2-R3) / (R2+R3) < 0. Therefore, it is advantageous to effectively balance the radius of curvature of the image-side surface of the first lens element and the radius of curvature of the object-side surface of the second lens element so that the first lens element can work together with the second lens element to correct astigmatism and spherical aberration in the central image. Furthermore, the following condition can also be satisfied: -2.60 < (R2-R3) / (R2+R3) < -0.25.

[0033] If the mean thickness of the first lens element is CT1 and the mean thickness of the second lens element is CT2, the following condition can be met: 1.30 < CT1 / CT2 < 2.30. Therefore, it is advantageous to balance the mean thicknesses of the first and second lens elements to improve the light convergence effect at the central image. Furthermore, the following condition can also be met: 1.50 < CT1 / CT2 < 2.00.

[0034] If the axial distance between the second and third lens elements is T23 and the mean thickness of the third lens element is CT3, the following condition can be met: 0.50 < T23 / CT3 < 1.30. Therefore, it is advantageous to balance the lens distance between the second and third lens elements and the mean thickness of the third lens element, thereby adjusting the propagation direction of the beam path at the image end of the photographic lens arrangement and increasing design flexibility. Furthermore, the following condition can also be met: 0.70 < T23 / CT3 < 1.15.

[0035] If the Abbe number of the second lens element is V2, the following condition can be met: 10.0 < V2 < 25.0. Therefore, it is advantageous to correct the chromatic aberration produced in the optical lens arrangement for photography and thereby improve image quality. Furthermore, the following condition can also be met: 14.0 < V2 < 20.0.

[0036] If the maximum effective radius of the image-side surface of the third lens element is Y3R2 and the mean thickness of the third lens element is CT3, the following condition can be met: 1.50 < Y3R2 / CT3 < 4.00. Therefore, a suitable adjustment of the lens thickness of the third lens element and the optical effective radius of the image-side surface of the third lens element is advantageous to compensate for the propagation direction of light at the image end of the optical lens arrangement for photography and to reduce the angle of incidence of the imaged light onto the image surface. Furthermore, the following condition can also be met: 1.80 < Y3R2 / CT3 < 3.80. See [reference]. Fig. , which shows a schematic view of Y3R2 according to the first embodiment of the present disclosure.

[0037] If a displacement parallel to the optical axis from an axial vertex on the object-side surface of the second lens element to a position with maximum effective radius on the object-side surface of the second lens element is Sag2R1, and a displacement parallel to the optical axis from an axial vertex on the image-side surface of the second lens element to a position with maximum effective radius on the image-side surface of the second lens element is Sag2R2, and the mean thickness of the second lens element is CT2, then the following condition can be satisfied: 0.03 < (|Sag2R1|+|Sag2R2|) / / CT2 < 0.25. Therefore, it is advantageous to compensate for the extent of the deviation of the peripheral lens shape on the object-side surface and the image-side surface of the second lens element in order to reduce the deflection angle of the light and prevent total internal reflection.Furthermore, the following condition can also be satisfied: 0.05 < (|Sag2R1|+|Sag2R2|) / / CT2 < 0.22. See . Fig. Figure 1 shows a schematic representation of Sag2R1 and Sag2R2 according to the first embodiment of the present disclosure. The displacement value is positive when the direction from the axial vertex of a surface to the position of the maximum effective radius of the same surface points to the image side of the optical lens arrangement for photography; the displacement value is negative when the direction from the axial vertex of the surface to the position of the maximum effective radius of the same surface points to the object side of the optical lens arrangement for photography.

[0038] If the maximum value among the mean thicknesses of all lens elements in the optical lens assembly for photography is CTmax, and the minimum value among the mean thicknesses of all lens elements in the optical lens assembly for photography is CTmin, the following condition can be met: 1.45 < CTmax / CTmin < 2.20. Therefore, it is advantageous to balance the mean thickness of the lens elements to achieve a low optical lens thickness. Furthermore, the following condition can also be met: 1.50 < CTmax / CTmin < 2.00.

[0039] If the radius of curvature of the object-side surface of the first lens element is R1 and the central thickness of the first lens element is CT1, the following condition can be met: 1.00 < R1 / CT1 < 1.50. Therefore, it is advantageous to balance the radius of curvature of the object-side surface of the first lens element and the central thickness of the first lens element to achieve a suitable balance between controlling the propagation direction of the beam path and reducing the overall size of the optical lens arrangement for photography. Furthermore, the following condition can also be met: 1.20 < R1 / CT1 < 1.45.

[0040] If the axial distance between the object-side surface of the first lens element and the image area is TL, and the maximum image height of the optical lens arrangement for photography (which can be half the diagonal length of an effective light-sensitive area of ​​the image sensor) is ImgH, the following condition can be satisfied: 1.40 < TL / ImgH < 2.00. Therefore, this is advantageous for achieving a reasonable balance between the overall path length and the image area size of the optical lens arrangement for photography. Furthermore, the following condition can also be satisfied: 1.50 < TL / ImgH < 1.80.

[0041] If the entrance pupil diameter (EPD) of the optical lens arrangement for photography is given by [EPD] and the maximum image height (ImgH) of the optical lens arrangement for photography is given by [ImgH], the following condition can be met: 0.70 < EPD / ImgH < 0.90. Therefore, a suitable balance between the entrance pupil size and the image height is advantageous for adjusting the direction of light propagation, thereby reducing the angle of incidence onto the image area and increasing the illuminance in the peripheral field of view. Furthermore, the following condition can also be met: 0.75 < EPD / ImgH < 0.86.

[0042] If the focal length of the optical lens arrangement for photography is f and the radius of curvature of the image-side surface of the third lens element is R6, the following condition can be met: 0.70 < f / R6 < 2.00. Therefore, it is advantageous to adjust the radius of curvature of the image-side surface of the third lens element to achieve a suitable balance between maintaining the focal length and reducing the rear focal length. Furthermore, the following condition can also be met: 0.90 < f / R6 < 1.80.

[0043] If the mean thickness of the first lens element is CT1 and the axial distance between the second and third lens elements is T23, the following condition can be met: 1.40 < CT1 / T23 < 2.40. Therefore, it is advantageous to balance the mean thickness of the first lens element and the lens distance between the second and third lens elements, thereby increasing space utilization and reducing manufacturing tolerances. Furthermore, the following condition can also be met: 1.50 < CT1 / T23 < 2.10.

[0044] If the f-number of the optical lens arrangement used for photography is FNO, the following condition can be met: 1.80 < FNO < 2.20. Therefore, this is advantageous for achieving a reasonable balance between illumination and depth of field, and also for increasing the amount of incident light to improve image quality. Furthermore, the following condition can also be met: 1.90 < FNO < 2.10.

[0045] If half of the maximum field of view of the optical lens assembly is HFOV, the following condition can be met: 26.0 degrees < HFOV < 35.0 degrees. Therefore, this is advantageous for having a sufficient imaging area of ​​the optical lens to meet the viewing angle requirements of the device being used. Furthermore, the following condition can also be met: 28.0 degrees < HFOV < 33.0 degrees.

[0046] If the axial distance between the object-side surface of the first lens element and the image plane is TL, the following condition can be met: 0.500 mm (millimeters) < TL < 1.800 mm. Therefore, it is advantageous to maintain the overall length to achieve a low overall lens thickness. Furthermore, the following condition can also be met: 0.800 mm < TL < 1.500 mm.

[0047] If the focal length of the optical lens arrangement for photography is f, the following condition can be met: 0.80 mm < f < 1.50 mm. Therefore, a suitable configuration of the distance at which the light is focused is advantageous to meet the needs of various applications. Furthermore, the following condition can also be met: 0.90 mm < f < 1.30 mm.

[0048] According to the present disclosure, the above-mentioned features and conditions can be used in numerous combinations to achieve corresponding effects.

[0049] According to the present disclosure, the lens elements of the optical lens arrangement for photography can be made of either glass or plastic. If the lens elements are made of glass, the refractive power distribution of the optical lens arrangement for photography can be more flexible, and the influence of changes in ambient temperature on the imaging can be reduced. The glass lens element can be manufactured either by grinding or by forming. If the lens elements are made of plastic, the manufacturing costs can be effectively reduced. Furthermore, the surfaces of the individual lens elements 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, effectively shortening the overall length of the optical lens assembly for photography. Additionally, the aspherical surfaces can be manufactured by plastic injection molding or glass forming.

[0050] According to the present disclosure, an aspherical lens surface means that the lens surface has an aspherical shape over its entire optically effective area or part thereof.

[0051] 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 prevent excessive blue light and / or near-ultraviolet light from interfering with the final image. The additive can be homogeneously mixed with a plastic material used to manufacture a lens element from the mixed material by injection molding.Furthermore, the additive can be applied to the lens surfaces to achieve the effects mentioned above.

[0052] According to the present disclosure, both the object-side surface and the image-side surface have a paraxial region and an off-axis region. The paraxial region refers to the region of the surface in which light rays travel close to the optical axis, and the off-axis region refers to the region of the surface that is away from the paraxial region. In particular, unless otherwise specified, if the lens element has a convex surface, the surface is convex in its paraxial region, and if the lens element has a concave surface, the surface is concave in its paraxial region. If a region of refractive power, radius of curvature, or focal point of a lens element is not defined, this means that the region of refractive power, radius of curvature, or focal point of the lens element is located in its paraxial region.

[0053] 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.

[0054] According to the present disclosure, the image surface of the optical lens arrangement for photography, based on the corresponding image sensor, can be flat or curved, wherein in particular a curved surface is oriented concavely towards the object side of the optical lens arrangement for photography.

[0055] According to the present disclosure, an image correction unit, such as a field flattener, can optionally be arranged between the lens element that is closest to the image-side along the beam path of the optical lens arrangement for photography and the image surface to correct aberrations such as field curvature. The optical properties of the image correction unit, such as curvature, thickness, refractive index, position, and surface shape (convex or concave surface of spherical, aspherical, diffractive, or Fresnel type), can be adapted according to the design of the image acquisition unit. In general, a preferred image correction unit is, for example, a thin transparent element with a concave object-side surface and a flat image-side surface, wherein the thin transparent element is arranged near the image surface.

[0056] According to the present disclosure, at least one refractive element, such as a prism or a mirror, whose surface may be planar, spherical, aspherical, or free-form, can optionally be arranged between an imaged object and the image plane on the optical imaging path, so that the optical lens arrangement for photography can be arranged more flexibly in space and therefore the dimensions of an electronic device are not limited by the overall length of the optical lens arrangement for photography. See in particular Fig. 25 and Fig. 26. Fig. Figure 25 shows a schematic view of a configuration of a light deflection element in an optical lens arrangement for photography according to an embodiment of the present disclosure, and Fig.Figure 26 shows a schematic view of another configuration of a light deflection element in an optical lens arrangement for photography according to an embodiment of the present disclosure. Fig. 25 and Fig. 26. The optical lens arrangement for photography can, in the sequence from a photographed object (not shown in the figures) to an image surface IMG along a beam path, have a first optical axis OA1, a light deflection element LF, and a second optical axis OA2. The light deflection element LF can be arranged between the photographed object and a lens group LG of the optical lens arrangement for photography, as shown in Fig. 25 shown, or arranged between a lens group LG of the optical lens arrangement for photography and the image area IMG, as shown in Fig. 26 shown. Also note Fig., which shows a schematic view of a configuration of two light deflecting elements in an optical lens arrangement for photography according to an embodiment of the present disclosure. In Fig.27. The optical lens arrangement for photography can have, in the sequence from a photographed object (not shown in the figure) to an image surface IMG along a beam path, a first optical axis OA1, a first light deflection element LF1, a second optical axis OA2, a second light deflection element LF2, and a third optical axis OA3. The first light deflection element LF1 is arranged between the photographed object and a lens group LG of the optical lens arrangement for photography, the second light deflection element LF2 is arranged between the lens group LG of the optical lens arrangement for photography and the image surface IMG, and the direction of propagation of the light on the first optical axis OA1 can be the same direction as the direction of propagation of the light on the third optical axis OA3, as shown in Fig.27 shown. The optical lens arrangement for photography can optionally be provided with three or more light deflecting elements, and the present disclosure is not limited to the type, number and position of the light deflecting elements of the embodiments disclosed in the aforementioned figures.

[0057] According to the present disclosure, the optical lens arrangement for photography can include at least one aperture, for example an aperture diaphragm, a stray light reduction diaphragm, or a field diaphragm. The stray light reduction diaphragm or the field diaphragm is adjusted to eliminate stray light and thereby improve image quality.

[0058] According to the present disclosure, an aperture diaphragm can be configured as a front diaphragm or a middle diaphragm. A front diaphragm, positioned between an imaged object and the first lens element, can provide a greater distance between the exit pupil of the optical lens arrangement used for photography and the image plane, thus producing a telecentric effect and improving the image sensor efficiency of an image sensor (for example, CCD or CMOS). A middle diaphragm, positioned between the first lens element and the image plane, is advantageous for increasing the viewing angle of the optical lens arrangement used for photography, thereby providing a wider field of view for it.

[0059] According to the present disclosure, the optical lens arrangement for photography 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 a blade arrangement 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 opening of the present disclosure, which changes the f-number to achieve various image effects, such as depth of field or lens speed.

[0060] According to the present disclosure, the optical lens arrangement for photography can comprise one or more optical elements to limit the shape of the light passing through the optical lens arrangement. 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 layer, etc. The optical element can be located on the object side or the image side of the optical lens arrangement for photography, or between two adjacent lens elements, to transmit light in a specific shape and thus meet the application requirements.

[0061] According to the present disclosure, the optical lens arrangement for photography can comprise at least one optical lens element, an optical element, or a support having at least one surface with a low-reflective layer. The low-reflective layer can effectively reduce scattered light resulting from light reflection at the interface. The low-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 barrel element, a cover glass, a blue glass, a filter, a color filter, a light path deflection element, a prism, a mirror, etc.The support can be a base for holding a lens assembly, a microlens arranged on an image sensor, a substrate surrounding the image sensor, a glass plate to protect the image sensor, etc.

[0062] According to the present disclosure, the optical lens arrangement for photography can further comprise a light-blocking element. The light-blocking element can have a non-circular aperture, and the non-circular aperture can have different effective radii in different directions perpendicular to the optical axis. Therefore, it is advantageous to adapt it to the shape of non-circular lens elements or apertures in order to save space and to fully utilize the light passing through the non-circular lens elements or apertures, thereby reducing stray light. In addition, the light-blocking element can be provided with a wave-like structure or a serrated structure on its circumference.

[0063] 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. If the optical axis is refracted by a refractive element, the axial optical data are also calculated along the refracted optical axis.

[0064] In accordance with the above description of the present disclosure, the following specific embodiments are provided for further explanation. 1. Design

[0065] 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.1 The image acquisition unit 1 comprises the optical lens arrangement for photography (whose reference numeral is omitted) of the present disclosure and an image sensor IS. The optical lens arrangement for photography comprises, in order from the object side to the image side along an optical axis, an aperture ST, a first lens element E1, an aperture S1, a second lens element E2, an aperture S2, a third lens element E3, a filter E4, and an image area IMG. The optical lens arrangement for photography comprises three lens elements (E1, E2, and E3), with no additional lens element arranged between any three adjacent lens elements.

[0066] The first lens element E1, with positive refractive power, has an object-side surface that is convex in a paraxial region and an image-side surface that is concave in a paraxial region. The first lens element E1 is made of plastic and has aspherical surfaces on both the object-side and image-side surfaces. The image-side surface of the first lens element E1 has an inflection point.

[0067] The second lens element E2, with negative refractive power, has an object-side surface that is concave in a paraxial region and an image-side surface that is convex in a paraxial region. The second lens element E2 is made of plastic and has both an aspherical object-side surface and an aspherical image-side surface. The image-side surface of the second lens element E2 has an inflection point. The image-side surface of the second lens element E2 has a critical point in an off-axis region.

[0068] The third lens element E3, with negative refractive power, has an object-side surface that is convex in a paraxial region and an image-side surface that is concave in a paraxial region. The third lens element E3 is made of plastic and has both an aspherical object-side surface and an aspherical image-side surface. 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. The object-side surface of the third lens element E3 has a critical point in an off-axis region. The image-side surface of the third lens element E3 has a critical point in an off-axis region.

[0069] The E4 filter is made of glass and is located between the third lens element E3 and the image area IMG. It does not affect the focal length of the optical lens assembly used for photography. The IS image sensor is located on or near the image area IMG of the optical lens assembly used for photography.

[0070] The equation for the aspherical surface profiles of the above-mentioned lens elements of the first embodiment is as follows: X(Y)=(Y2 / R) / (1+sqrt(1−(1+k)×(Y / R)2))+∑i(Ai)×(Yi) , where X is the displacement parallel to the optical axis from an axial vertex on the aspherical surface to a point at a distance Y from the optical axis on the aspherical surface; Y is the vertical distance from the point on the aspherical surface to the optical axis; R is the radius of curvature; k is the conic coefficient; and Ai is the i-th aspheric coefficient, and in the embodiments i can be, without limitation, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22 and 24.

[0071] In the optical lens arrangement for photographing the image acquisition unit 1 according to the first embodiment, where a focal length of the optical lens arrangement for photographing is f, an aperture number of the optical lens arrangement for photographing is FNO, and half of a maximum field of view of the optical lens arrangement for photographing is HFOV, these parameters have the following values: f = 1.13 millimeters (mm), FNO = 2.00, and HFOV = 29.9 degrees (deg).

[0072] If the axial distance between the object-side surface of the first lens element E1 and the image plane IMG TL is, the following condition is met: TL = 1.168 mm.

[0073] If the axial distance between the object-side surface of the first lens element E1 and the image plane IMG TL is and the maximum image height of the optical lens arrangement for photography is IMGH, then the following condition is met: TL / IMGH = 1.69.

[0074] If the axial distance between the object-side surface of the first lens element E1 and the image-side surface of the third lens element E3 is TD and the entrance pupil diameter of the optical lens arrangement for photography is EPD, then the following condition is met: TD / EPD = 1.56.

[0075] If the entrance pupil diameter of the optical lens arrangement for photography is EPD and the maximum image height of the optical lens arrangement for photography is ImgH, then the following condition is met: EPD / ImgH = 0.82.

[0076] If the focal length of the second lens element E2 is f2 and the focal length of the third lens element E3 is f3, then the following condition is met: 10×|f3 / f2| = 1.47.

[0077] If the focal length of the optical lens arrangement for photography is f and the radius of curvature of the image-side surface of the first lens element E1 is R2, the following condition is met: f / R2 = 1.27.

[0078] If the focal length of the optical lens arrangement for photography is f and the radius of curvature of the image-side surface of the third lens element E3 is R6, the following condition is met: f / R6 = 1.90.

[0079] If the focal length of the optical lens arrangement for photography is f, the radius of curvature of the object-side surface of the second lens element E2 is R3, and the radius of curvature of the image-side surface of the second lens element E2 is R4, then the following condition is satisfied: |f / R3|+|f / R4| = 0.60.

[0080] If the radius of curvature of the image-side surface of the first lens element E1 is R2 and the radius of curvature of the image-side surface of the third lens element E3 is R6, then the following condition is met: R2 / R6 = 1.50.

[0081] If the radius of curvature of the image-side surface of the first lens element is E1 R2 and the radius of curvature of the object-side surface of the second lens element is E2 R3, then the following condition is met: (R2-R3) / (R2+R3) = -1.90.

[0082] 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 third lens element E3 is R6, then the following condition is met: (R5+R6) / (R5-R6) = 1.52.

[0083] If the radius of curvature of the object-side surface of the first lens element E1 is R1 and the mean thickness of the first lens element E1 is CT1, the following condition is met: R1 / CT1 = 1.32.

[0084] If the mean thickness of the first lens element E1 is CT1 and the mean thickness of the second lens element E2 is CT2, then the following condition is met: CT1 / CT2 = 1.74.

[0085] If the mean thickness of the first lens element E1 is CT1 and the axial distance between the second lens element E2 and the third lens element E3 is T23, the following condition is met: CT1 / T23 = 1.68. 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.

[0086] If the axial distance between the second lens element E2 and the third lens element E3 is T23 and the mean thickness of the third lens element E3 is CT3, then the following condition is met: T23 / CT3 = 0.97.

[0087] If the mean thickness of the third lens element E3 is CT3 and the axial distance between the first lens element E1 and the second lens element E2 is T12, the following condition is met: CT3 / T12 = 1.06.

[0088] If the maximum value among the central thicknesses of all lens elements of the optical lens arrangement for photography is CTmax and the minimum value among the central thicknesses of all lens elements of the optical lens arrangement for photography is CTmin, the following condition is met: CTmax / CTmin = 1.74. In this embodiment, the central thickness of the first lens element E1 is greater than the central thicknesses of the other lens elements of the optical lens arrangement for photography, and CTmax is equal to the central thickness of the first lens element E1. In this embodiment, the central thickness of the second lens element E2 is less than the central thicknesses of the other lens elements of the optical lens arrangement for photography, and CTmin is equal to the central thickness of the second lens element E2.

[0089] If the Abbe number of the second lens element E2 is V2, then the following condition is met: V2 = 18.4.

[0090] If the Abbe number of the second lens element E2 is V2 and the Abbe number of the third lens element E3 is V3, then the following condition is satisfied: V2+V3 = 46.7.

[0091] If the Abbe number of the first lens element E1 is V1 and the refractive index of the first lens element E1 is N1, then the following condition is met: V1 / N1 = 36.51.

[0092] If the Abbe number of the second lens element E2 is V2 and the refractive index of the second lens element E2 is N2, then the following condition is met: V2 / N2 = 10.91.

[0093] If the Abbe number of the third lens element E3 is V3 and the refractive index of the third lens element E3 is N3, then the following condition is met: V3 / N3 = 17.83.

[0094] If the maximum effective radius of the image-side surface of the third lens element E3 is Y3R2 and the mean thickness of the third lens element E3 is CT3, then the following condition is met: Y3R2 / CT3 = 3.20.

[0095] If a displacement parallel to the optical axis from an axial vertex on the object-side surface of the second lens element E2 to a position with maximum effective radius on the object-side surface of the second lens element E2 is Sag2R1, and a displacement parallel to the optical axis from an axial vertex on the image-side surface of the second lens element E2 to a position with maximum effective radius on the image-side surface of the second lens element E2 is Sag2R2, and the mean thickness of the second lens element E2 is CT2, then the following condition is satisfied: (|Sag2R1|+|Sag2R2|) / CT2 = 0.18. In this embodiment, the direction of Sag2R1 is towards the object side of the optical lens arrangement for photography, so the value of Sag2R1 is negative.In this embodiment, the direction of Sag2R2 is directed towards the object side of the optical lens arrangement for photography, so that the value of Sag2R2 is negative.

[0096] The detailed optical data of the first embodiment are listed in Table 1A and the data of the aspherical surface are listed in Table 1B below. TABLE 1A 1. Design f = 1.13 mm, FNO = 2.00, HFOV = 29.9 degrees. Surface No. radius of curvature thickness material index Abbe # Focal length 0 object Infinite Infinite 1 Fig. Aperture Plano -0,115 2 Lens 1 0,3447 (ASP) 0,261 plastic 1,534 56,0 0,90 3 0,8900 (ASP) 0,082 4 Aperture Plano 0,069 5 Lens 2 -2,8698 (ASP) 0,150 plastic 1,686 18,4 -8,89 6 -5,5352 (ASP) 0,071 7 Aperture Plano 0,084 8 Lens 3 2,8939 (ASP) 0,160 plastic 1,587 28,3 -1,30 9 0,5928 (ASP) 0,100 10 filter Plano 0,110 Glass 1,517 64,2 - 11 Plano 0,081 12 Picture Plano - Note: The reference wavelength is 587.6 nm (d-line). The effective radius of aperture S1 (surface 4) is 0.210 mm. The effective radius of aperture S2 (surface 7) is 0.390 mm. TABLE 1B Aspheric coefficients Surface No. 2 3 5 k = -1,53356E+01 -8,69652E+01 -7,57268E+01 A4 = 3,7427271 E+01 9,3463752E+00 3,3105186E+00 A6 = -1,2725337E+03 2,1167976E+02 -2,7938926E+02 A8 = 4,7283731 E+04 -2,8433349E+04 -1,0083742E+05 A10 = -1,5459301E+06 1,0364728E+06 1,3379587E+07 A12 = 3,7603563E+07 -1,8319714E+07 -7,5086747E+08 A14 = -6,0215005E+08 1,5391190E+08 2,2726807E+10 A16 = 5,8791561E+09 -4,8231895E+08 -3,8537734E+11 A18 = -3,1494459E+10 - 3,4275624E+12 A20 = 7,0520129E+10 - -1,2397176E+13 Surface No. 6 8 9 k = 0,00000E+00 -8,84756E+01 -5,38312E-01 A4 = -6,4073218E+00 -1,9433485E+01 -1,7148061E+01 A6 = 6,1552244E+02 3,1839269E+02 2,5018304E+02 A8 = -3,4268759E+04 -4,8083694E+03 -3,6611916E+03 A10 = 1,2022851E+06 6,3566210E+04 4,3647579E+04 A12 = -2,6131993E+07 -7,2745421 E+05 -3,9881367E+05 A14 = 3,5512466E+08 7,8855244E+06 2,6980428E+06 A16 = -2,9497292E+09 -6,9841764E+07 -1,3125554E+07 A18 = 1 ,3700484E+1 0 4,2023134E+08 4,4319404E+07 A20 = -2,7198865E+10 -1,5450411 E+09 -9,8160393E+07 A22 = - 3,1097386E+09 1,2776253E+08 A24 = - -2,6201982E+09 -7,3760796E+07

[0097] Table 1A lists the radius of curvature, thickness, and focal length in millimeters (mm). Surface numbers 0–12 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–A24 represent the aspherical coefficients of order 4 to 24. 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

[0098] Fig. Figure 3 is a schematic representation of an image acquisition unit according to the second embodiment of the present disclosure. Fig.Figure 4 shows, from left to right, spherical aberration curves, astigmatic field curves, and a distortion curve of the image acquisition unit according to the second embodiment. Fig. 3 The image acquisition unit 2 comprises the photographing optical lens arrangement (whose reference numeral is omitted) of the present disclosure and an image sensor IS. The photographing optical lens arrangement comprises, in order from the object side to the image side along an optical axis, an aperture ST, a first lens element E1, an aperture S1, a second lens element E2, an aperture S2, a third lens element E3, a filter E4, and an image area IMG. The photographing optical lens arrangement comprises three lens elements (E1, E2, and E3), with no additional lens element arranged between any three adjacent lens elements.

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

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

[0101] The third lens element E3, with negative refractive power, has an object-side surface that is concave in a paraxial region and an image-side surface that is also concave in a paraxial region. The third lens element E3 is made of plastic and has both an aspherical object-side surface and an aspherical image-side surface. The object-side surface of the third lens element E3 has one inflection point. The image-side surface of the third lens element E3 has two inflection points. The image-side surface of the third lens element E3 has a critical point in an off-axis region.

[0102] The E4 filter is made of glass and is located between the third lens element E3 and the image area IMG. It does not affect the focal length of the optical lens assembly used for photography. The IS image sensor is located on or near the image area IMG of the optical lens assembly used for photography.

[0103] The detailed optical data of the second embodiment are listed in Table 2A and the data of the aspherical surface are listed in Table 2B below. TABLE 2A 2. Design f = 1.09 mm, FNO = 2.00, HFOV = 31.1 degrees. Surface No. radius of curvature thickness material index Abbe # Focal length 0 object Infinite Infinite 1 Fig. Aperture Plano -0,119 2 Lens 1 0,3519 (ASP) 0,254 plastic 1,534 55,9 1,02 3 0,7421 (ASP) 0,092 4 Aperture Plano 0,046 5 Lens 2 2,0500 (ASP) 0,161 plastic 1,656 21,3 5,18 6 5,0000 (ASP) 0,053 7 Aperture Plano 0,103 8 Lens 3 -2,5347 (ASP) 0,194 plastic 1,614 25,6 -1,21 9 1,0816 (ASP) 0,100 10 filter Plano 0,110 Glass 1,517 64,2 - 11 Plano 0,064 12 Picture Plano - Note: The reference wavelength is 587.6 nm (d-line). The effective radius of aperture S1 (surface 4) is 0.204 mm. The effective radius of aperture S2 (surface 7) is 0.360 mm. TABLE 2B Aspheric coefficients Surface No. 2 3 5 k = -1,56497E+01 -5,50369E+01 3,66445E+01 A4 = 5,0751080E+01 1,6027375E+01 -3,0252905E+01 A6 = -3,1293250E+03 -6,1582382E+02 5,5832851E+03 A8 = 1,6937724E+05 2,6444142E+04 -6,1441802E+05 A10 = -6,1010483E+06 -7,6553479E+05 3,8944111E+07 A12 = 1,4191532E+08 1,2879004E+07 -1,5155247E+09 A14 = -2,1015513E+09 -1,1983740E+08 3,6566305E+10 A16 = 1,9084994E+10 4,7987650E+08 -5,3039965E+11 A18 = -9,6574495E+10 - 4,2061482E+12 A20 = 2,0768035E+11 - -1,3926914E+13 Surface # 6 8 9 k = -9,00000E+01 -2,16991E+01 1,28530E+00 A4 = -7,5490835E+00 -1,7553639E+01 -1,3588332E+01 A6 = 6,0555861 E+02 3,0471359E+02 2,1778866E+02 A8 = -2,5568345E+04 -3,1710670E+03 -3,3781096E+03 A10 = 6,4513137E+05 -5,1244209E+04 3,6735161E+04 A12 = -9,2518510E+06 2,6770717E+06 -2,6592761 E+05 A14 = 6,8101463E+07 -4,6996308E+07 1,2494048E+06 A16 = -1,5755472E+08 4,6215711E+08 -3,6246112E+06 A18 = -7,7271341E+08 -2,7743617E+09 5,7658276E+06 A20 = 3,7090325E+09 1,0102388E+10 -3,4673490E+06 A22 = - -2,0530809E+10 -8,2221618E+05 A24 = - 1,7881691E+10 -

[0104] In the second embodiment, the equation for the aspherical surface profiles of the aforementioned lens elements corresponds to the equation of the first embodiment. The definitions of these parameters, listed in Table 2C, also correspond to those given in the first embodiment, with corresponding values ​​for the second embodiment, so no further explanation is required.

[0105] Furthermore, these parameters from Table 2A and Table 2B can be calculated as the following values ​​and satisfy the following conditions: TABLE 2C Schematic parameters f [mm] 1,09 R1 / CT1 1,39 FNO 2,00 CT1 / CT2 1,58 HFOV [Grade] 31,1 CT1 / T23 1,63 TL [mm] 1,177 T23 / CT3 0,80 TL / ImgH 1,67 CT3 / T12 1,41 TD / EPD 1,65 CTmax / CTmin 1,58 EPD / ImgH 0,78 V2 21,3 10×|f3 / f2| 2,33 V2+V3 46,9 f / R2 1,47 V1 / N1 36,44 f / R6 1,01 V2 / N2 12,86 |f / R3|+|f / R4| 0,75 V3 / N3 15,86 R2 / R6 0,69 Y3R2 / CT3 2,57 (R2-R3) / (R2+R3) -0,47 (|Sag2R1|+|Sag2R2|) / / CT2 0,12 (R5+R6) / (R5-R6) 0,40 - - 3. Design

[0106] Fig. Figure 5 is a schematic representation of an image acquisition unit according to the third embodiment of the present disclosure. Fig. Figure 6 shows, 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 arrangement for photography (whose reference numeral is omitted) of the present disclosure, and an image sensor IS. The optical lens arrangement for photography comprises, in order from the object side to the image side along an optical axis, an aperture ST, a first lens element E1, an aperture S1, a second lens element E2, an aperture S2, a third lens element E3, a filter E4, and an image area IMG. The optical lens arrangement for photography comprises three lens elements (E1, E2, and E3), with no additional lens element arranged between any three adjacent lens elements.

[0107] The first lens element E1, with positive refractive power, has an object-side surface that is convex in a paraxial region and an image-side surface that is concave in a paraxial region. The first lens element E1 is made of plastic and has both an aspherical object-side surface and an aspherical image-side surface. The image-side surface of the first lens element E1 has an inflection point.

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

[0109] The third lens element E3, with negative refractive power, has an object-side surface that is convex in a paraxial region and an image-side surface that is concave in a paraxial region. The third lens element E3 is made of plastic and has both an aspherical object-side surface and an aspherical image-side surface. 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 two inflection points. The object-side surface of the third lens element E3 has two critical points in an off-axis region. The image-side surface of the third lens element E3 has one critical point in an off-axis region.

[0110] The E4 filter is made of glass and is located between the third lens element E3 and the image area IMG, without affecting the focal length of the optical lens assembly used for photography. The IS image sensor is located on or near the image area IMG of the optical lens assembly used for photography.

[0111] The detailed optical data of the third embodiment are listed in Table 3A and the data of the aspherical surface in Table 3B below. TABLE 3A 3. Design f = 1.14 mm, FNO = 2.00, HFOV = 29.6 degrees. Surface No. radius of curvature thickness material index Abbe # Focal length 0 object Infinite Infinite 1 Fig. Aperture Plano -0,125 2 Lens 1 0,3548 (ASP) 0,260 plastic 1,544 56,0 0,87 3 1,0654 (ASP) 0,092 4 Aperture Plano 0,062 5 Lens 2 -2,6877 (ASP) 0,152 plastic 1,686 18,4 -4,11 6 -59,3116 (ASP) 0,056 7 Aperture Plano 0,090 8 Lens 3 11,1718 (ASP) 0,188 plastic 1,587 28,3 -1,38 9 0,7528 (ASP) 0,100 10 filter Plano 0,110 Glass 1,517 64,2 - 11 Plano 0,073 12 Picture Plano - Note: The reference wavelength is 587.6 nm (d-line). The effective radius of aperture S1 (surface 4) is 0.210 mm. The effective radius of aperture S2 (surface 7) is 0.372 mm. TABLE 3B Aspheric coefficients Surface No. 2 3 5 k = -1,63729E+01 -6,43218E+01 5,21565E+01 A4 = 4,3895005E+01 1,5755385E+01 -8,3023442E+00 A6 = -2,1397962E+03 -9,9995906E+02 2,4012205E+03 A8 = 9,7143977E+04 4,6895177E+04 -3,7173992E+05 A10 = -3,0968608E+06 -1,3366577E+06 2,8738476E+07 A12 = 6,5547374E+07 2,1849654E+07 -1,2781440E+09 A14 = -8,9372598E+08 -1,9093908E+08 3,3959526E+10 A16 = 7,5070500E+09 6,8738923E+08 -5,3065669E+11 A18 = -3,5190861E+10 - 4,4737831E+12 A20 = 7,0110301E+10 - -1,5619643E+13 Surface # 6 8 9 k = -4,18776E+01 9,90000E+01 4,35980E-02 A4 = -1,7031339E+01 -2,1008102E+01 -1,4707365E+01 A6 = 1,5862312E+03 5,5396784E+02 1,8589173E+02 A8 = -8,3492478E+04 -1,5202579E+04 -1,8318841E+03 A10 = 2,6324936E+06 3,0715539E+05 6,4829091 E+03 A12 = -4,9866692E+07 -4,0627948E+06 8,1505168E+04 A14 = 5,6705931 E+08 3,5432283E+07 -1,3070462E+06 A16 = -3,7161227E+09 -2,0241381E+08 8,8217033E+06 A18 = 1,2498389E+10 7,2700935E+08 -3,4454039E+07 A20 = -1,5612144E+10 -1,4850473E+09 8,0364697E+07 A22 = - 1,3125905E+09 -1,0396948E+08 A24 = - - 5,7370845E+07

[0112] In the third embodiment, the equation for the aspherical surface profiles of the aforementioned lens elements corresponds to the equation of the first embodiment. The definitions of the parameters listed in Table 3C also correspond to those of the first embodiment, with the corresponding values ​​for the third embodiment, so no further explanation is required.

[0113] Furthermore, these parameters from Table 3A and Table 3B can be calculated as the following values ​​and satisfy the following conditions: TABLE 3C Schematic parameters f [mm] 1,14 R1 / CT1 1,36 FNO 2,00 CT1 / CT2 1,71 HFOV [Grade] 29,6 CT1 / T23 1,78 TL [mm] 1,183 T23 / CT3 0,78 TL / ImgH 1,71 CT3 / T12 1,22 TD / EPD 1,58 CTmax / CTmin 1,71 EPD / ImgH 0,83 V2 18,4 10×|f3 / f2| 3,37 V2+V3 46,7 f / R2 1,07 V1 / N1 36,27 f / R6 1,52 V2 / N2 10,91 |f / R3|+|f / R4| 0,44 V3 / N3 17,83 R2 / R6 1,42 Y3R2 / CT3 2,73 (R2-R3) / (R2+R3) -2,31 (|Sag2R1|+|Sag2R2|) / / CT2 0,19 (R5+R6) / (R5-R6) 1,14 - - 4. Design

[0114] Fig. Figure 7 is a schematic representation of an image acquisition unit according to the 4th embodiment of the present disclosure. Fig. Figure 8 shows, from left to right, spherical aberration curves, astigmatic field curves, and a distortion curve of the image acquisition unit according to the fourth embodiment. Fig.7 The image acquisition unit 4 comprises the optical lens arrangement for photography (whose reference numeral is omitted) of the present disclosure and an image sensor IS. The optical lens arrangement for photography comprises, in order from the object side to the image side along an optical axis, an aperture ST, a first lens element E1, an aperture S1, a second lens element E2, an aperture S2, a third lens element E3, a filter E4, and an image area IMG. The optical lens arrangement for photography comprises three lens elements (E1, E2, and E3), with no additional lens element arranged between any three adjacent lens elements.

[0115] The first lens element E1, with positive refractive power, has an object-side surface that is convex in a paraxial region and an image-side surface that is concave in a paraxial region. The first lens element E1 is made of plastic and has aspherical surfaces on both the object-side and image-side surfaces. The image-side surface of the first lens element E1 has an inflection point.

[0116] The second lens element E2, with negative refractive power, has an object-side surface that is concave in a paraxial region and an image-side surface that is convex in a paraxial region. The second lens element E2 is made of plastic and has aspherical surfaces on both the object-side and image-side surfaces. The image-side surface of the second lens element E2 has an inflection point. The image-side surface of the second lens element E2 has a critical point in an off-axis region.

[0117] 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 and has aspheric surfaces on both the object-side and image-side surfaces. The object-side surface of the third lens element E3 has one inflection point. The image-side surface of the third lens element E3 has two inflection points. The object-side surface of the third lens element E3 has a critical point in an off-axis region. The image-side surface of the third lens element E3 has a critical point in an off-axis region.

[0118] The E4 filter is made of glass and is located between the third lens element E3 and the image area IMG. It does not affect the focal length of the optical lens assembly used for photography. The IS image sensor is located on or near the image area IMG of the optical lens assembly used for photography.

[0119] The detailed optical data of the fourth embodiment are listed in Table 4A and the data of the aspherical surface in Table 4B below. TABLE 4A 4. Design f = 1.12 mm, FNO = 1.99, HFOV = 30.0 degrees. Surface No. radius of curvature thickness material index Abbe # Focal length 0 object Infinite Infinite 1 Fig. Aperture Plano -0,115 2 Lens 1 0,3465 (ASP) 0,262 plastic 1,545 56,1 0,91 3 0,8482 (ASP) 0,079 4 Aperture Plano 0,067 5 Lens 2 -3,0515 (ASP) 0,150 plastic 1,669 19,5 -108,48 6 -3,2482 (ASP) 0,030 7 Aperture Plano 0,130 8 Lens 3 -3,8020 (ASP) 0,167 plastic 1,566 37,4 -1,19 9 0,8309 (ASP) 0,050 10 filter Plano 0,110 Glass 1,517 64,2 - 11 Plano 0,120 12 Picture Plano - Note: The reference wavelength is 587.6 nm (d-line). The effective radius of aperture S1 (surface 4) is 0.210 mm. The effective radius of aperture S2 (surface 7) is 0.331 mm. TABLE 4B Aspheric coefficients Surface No. 2 3 5 k = -1,60691E+01 -9,00000E+01 -8,53712E+01 A4 = 4,0249223E+01 1,1620895E+01 -9,1463905E+00 A6 = -1,6427991E+03 7,1995108E+01 1,7829099E+03 A8 = 7,1138211E+04 -2,8742324E+04 -2,7922862E+05 A10 = -2,4008720E+06 1,3271398E+06 2,2635041 E+07 A12 = 5,5923516E+07 -2,8084344E+07 -1,0520774E+09 A14 = -8,4271375E+08 2,8050412E+08 2,8909032E+10 A16 = 7,7748713E+09 -1,0663937E+09 -4,6321662E+11 A18 = -3,9710876E+10 - 3,9784542E+12 A20 = 8,5548590E+10 - -1,4079870E+13 Surface # 6 8 9 k = 0,00000E+00 -8,92568E+01 2,43626E-01 A4 = -9,8949895E+00 -1,8957530E+01 -1,5043317E+01 A6 = 1,1835904E+03 4,9240016E+02 2,6933949E+02 A8 = -7,0574005E+04 -1,3507176E+04 -5,0229183E+03 A10 = 2,5211003E+06 2,6335457E+05 6,9815564E+04 A12 = -5,5393380E+07 -3,3199646E+06 -6,8244364E+05 A14 = 7,5835677E+08 2,8121393E+07 4,6480294E+06 A16 = -6,3043578E+09 -1,6363799E+08 -2,1871571E+07 A18 = 2,9084153E+10 6,4855868E+08 6,9651406E+07 A20 = -5,7015237E+10 -1,6754600E+09 -1,4357180E+08 A22 = - 2,5435522E+09 1,7358120E+08 A24 = - -1,7207233E+09 -9,3894313E+07

[0120] In the fourth embodiment, the equation for the aspherical surface profiles of the aforementioned lens elements corresponds to the equation of the first embodiment. The definitions of these parameters in Table 4C also correspond to those of the first embodiment, with the corresponding values ​​for the fourth embodiment, so no further explanation is given here.

[0121] Furthermore, these parameters from Table 4A and Table 4B can be calculated as the following values ​​and satisfy the following conditions: TABLE 4C Schematic parameters f [mm] 1,12 R1 / CT1 1,32 FNO 1,99 CT1 / CT2 1,75 HFOV [Grade] 30,0 CT1 / T23 1,64 TL [mm] 1,165 T23 / CT3 0,96 TL / ImgH 1,69 CT3 / T12 1,14 TD / EPD 1,57 CTmax / CTmin 1,75 EPD / ImgH 0,82 V2 19,5 10×|f3 / f2| 0,11 V2+V3 56,9 f / R2 1,32 V1 / N1 36,31 f / R6 1,35 V2 / N2 11,68 |f / R3|+|f / R4| 0,71 V3 / N3 23,88 R2 / R6 1,02 Y3R2 / CT3 3,01 (R2-R3) / (R2+R3) -1,77 (|Sag2R1|+|Sag2R2|) / / CT2 0,19 (R5+R6) / (R5-R6) 0,64 - - 5. Design

[0122] Fig. Figure 9 is a schematic representation of an image acquisition unit according to the fifth embodiment of the present disclosure. Fig. Figure 10 shows, from left to right, spherical aberration curves, astigmatic field curves, and a distortion curve of the image acquisition unit according to the fifth embodiment. Fig.9 The image acquisition unit 5 comprises the optical lens arrangement for photography (whose reference numeral is omitted) of the present disclosure and an image sensor IS. The optical lens arrangement for photography comprises, in order from the object side to the image side along an optical axis, an aperture ST, a first lens element E1, an aperture S1, a second lens element E2, an aperture S2, a third lens element E3, a filter E4, and an image area | IMG. The optical lens arrangement for photography comprises three lens elements (E1, E2, and E3), with no additional lens element arranged between any three adjacent lens elements.

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

[0124] The second lens element E2, with positive refractive power, has an object-side surface that is concave in a paraxial region and an image-side surface that is convex in a paraxial region. The second lens element E2 is made of plastic and has aspherical surfaces on both the object-side and image-side surfaces. The image-side surface of the second lens element E2 has an inflection point. The image-side surface of the second lens element E2 has a critical point in an off-axis region.

[0125] 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 and has aspheric surfaces on both the object-side and image-side surfaces. The object-side surface of the third lens element E3 has one inflection point. The image-side surface of the third lens element E3 has two inflection points. The object-side surface of the third lens element E3 has one critical point in an off-axis region. The image-side surface of the third lens element E3 has one critical point in an off-axis region.

[0126] The E4 filter is made of glass and is located between the third lens element E3 and the image area IMG. It does not affect the focal length of the optical lens assembly used for photography. The IS image sensor is located on or near the image area IMG of the optical lens assembly used for photography.

[0127] The detailed optical data of the fifth embodiment are listed in Table 5A and the data of the aspherical surface in Table 5B below. TABLE 5A 5. Design f = 1.12 mm, FNO = 2.00, HFOV = 29.7 degrees. Surface No. radius of curvature thickness material index Abbe # Focal length 0 object Infinite Infinite 1 Fig. Aperture Plano -0,122 2 Lens 1 0,3569 (ASP) 0,255 plastic 1,545 56,1 0,93 3 0,9043 (ASP) 0,093 4 Aperture Plano 0,082 5 Lens 2 -3,7372 (ASP) 0,218 plastic 1,697 16,3 14,04 6 -2,7693 (ASP) 0,057 7 Aperture Plano 0,097 8 Lens 3 -2,8192 (ASP) 0,141 plastic 1,660 20,4 -1,05 9 0,9344 (ASP) 0,080 10 filter Plano 0,080 Glass 1,517 64,2 - 11 Plano 0,087 12 Picture Plano - Note: The reference wavelength is 587.6 nm (d-line). The effective radius of aperture S1 (surface 4) is 0.210 mm. The effective radius of aperture S2 (surface 7) is 0.423 mm. TABLE 5B Aspheric coefficients Surface No. 2 3 5 k = -1,60329E+01 -6,63864E+01 -2,51792E+01 A4 = 3,8855409E+01 1,1403350E+01 -7,6307216E+00 A6 = -1,5626850E+03 -3,1067450E+02 1,4053568E+03 A8 = 6,3503378E+04 9,2954041 E+03 -1,9560957E+05 A10 = -1,9827001E+06 -2,2103389E+05 1,4260860E+07 A12 = 4,3525436E+07 3,4914606E+06 -6,0704391 E+08 A14 = -6,3208045E+08 -3,2491064E+07 1,5464049E+10 A16 = 5,7078040E+09 1,2582923E+08 -2,3126986E+11 A18 = -2,8767098E+10 - 1,8591330E+12 A20 = 6,1314250E+10 - -6,1612247E+12 Surface # 6 8 9 k = 3,98844E+01 -8,73977E+01 1,11658E+00 A4 = -5,2168961E+00 -2,2060462E+01 -1,6085746E+01 A6 = 4,3082097E+02 6,2987171E+02 2,6187723E+02 A8 = -1,7936352E+04 -1,5954991E+04 -3,7171884E+03 A10 = 4,5762333E+05 2,7737380E+05 3,7326808E+04 A12 = -7,0003900E+06 -3,1061877E+06 -2,5679337E+05 A14 = 6,5008965E+07 2,3269481 E+07 1,1961558E+06 A16 = -3,6087703E+08 -1,1997184E+08 -3,5978158E+06 A18 = 1,1053127E+09 4,2517870E+08 6,0780626E+06 A20 = -1,4415530E+09 -9,9435685E+08 -2,8861137E+06 A22 = - 1,3807313E+09 -6,6278341 E+06 A24 = - -8,5850379E+08 8,0758974E+06

[0128] In the 5th embodiment, the equation for the aspherical surface profiles of the aforementioned lens elements corresponds to the equation of the 1st embodiment. The definitions of the parameters listed in Table 5C also correspond to those of the 1st embodiment, with the corresponding values ​​for the 5th embodiment, so no further explanation is given here.

[0129] Furthermore, these parameters from Table 5A and Table 5B can be calculated as the following values ​​and satisfy the following conditions: TABLE 5C Schematic parameters f [mm] 1,12 R1 / CT1 1,40 FNO 2,00 CT1 / CT2 1,17 HFOV [Grade] 29,7 CT1 / T23 1,66 TL [mm] 1,190 T23 / CT3 1,09 TL / ImgH 1,72 CT3 / T12 0,81 TD / EPD 1,68 CTmax / CTmin 1,81 EPD / ImgH 0,81 V2 16,3 10×|f3 / f2| 0,75 V2+V3 36,7 f / R2 1,24 V1 / N1 36,31 f / R6 1,20 V2 / N2 9,61 |f / R3|+|f / R4| 0,71 V3 / N3 12,29 R2 / R6 0,97 Y3R2 / CT3 3,68 (R2-R3) / (R2+R3) -1,64 (|Sag2R1|+|Sag2R2|) / CT2 0,14 (R5+R6) / (R5-R6) 0,50 - - 6. Design

[0130] Fig. Figure 11 is a schematic representation of an image acquisition unit according to the 6th embodiment of the present disclosure. Fig. Figure 12 shows, 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 arrangement for photography (whose reference numeral is omitted) of the present disclosure and an image sensor IS. The optical lens arrangement for photography comprises, in order from the object side to the image side along an optical axis, an aperture ST, a first lens element E1, an aperture S1, a second lens element E2, an aperture S2, a third lens element E3, a filter E4, and an image area IMG. The optical lens arrangement for photography comprises three lens elements (E1, E2, and E3), with no additional lens element arranged between any three adjacent lens elements.

[0131] The first lens element E1, with positive refractive power, has an object-side surface that is convex in a paraxial region and an image-side surface that is concave in a paraxial region. The first lens element E1 is made of plastic and has both an aspherical object-side surface and an aspherical image-side surface. The image-side surface of the first lens element E1 has an inflection point.

[0132] The second lens element E2, with positive refractive power, has an object-side surface that is convex in a paraxial region and an image-side surface that is concave in a paraxial region. The second lens element E2 is made of plastic and has both an aspherical object-side surface and an aspherical image-side surface. 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.

[0133] 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 and has aspheric surfaces on both the object-side and image-side surfaces. The object-side surface of the third lens element E3 has one inflection point. The image-side surface of the third lens element E3 has two inflection points. The object-side surface of the third lens element E3 has one critical point in an off-axis region. The image-side surface of the third lens element E3 has one critical point in an off-axis region.

[0134] The E4 filter is made of glass and is located between the third lens element E3 and the image area IMG. It does not affect the focal length of the optical lens assembly used for photography. The IS image sensor is located on or near the image area IMG of the optical lens assembly used for photography.

[0135] The detailed optical data of the 6th embodiment are listed in Table 6A and the data of the aspherical surface are listed in Table 6B below. TABLE 6A 6. Design f = 1.12 mm, FNO = 2.00, HFOV = 31.3 degrees. Surface No. radius of curvature thickness material index Abbe # Focal length 0 object Infinite Infinite 1 Fig. Aperture Plano -0,101 2 Lens 1 0,3439 (ASP) 0,261 plastic 1,544 56,0 1,18 3 0,5441 (ASP) 0,086 4 Aperture Plano 0,038 5 Lens 2 1,5382 (ASP) 0,155 plastic 1,669 19,5 2,84 6 7,7809 (ASP) 0,053 7 Aperture Plano 0,080 8 Lens 3 -99,1908 (ASP) 0,261 plastic 1,639 23,5 -1,13 9 0,7301 (ASP) 0,100 10 filter Plano 0,110 Glass 1,517 64,2 - 11 Plano 0,076 12 Picture Plano - Note: The reference wavelength is 587.6 nm (d-line). The effective radius of aperture S1 (surface 4) is 0.211 mm. The effective radius of aperture S2 (surface 7) is 0.351 mm. TABLE 6B Aspheric coefficients Surface No. 2 3 5 k = -1,72534E+01 -7,03905E+01 -9,00000E+01 A4 = 3,1300522E+01 -9,0988006E+00 -1,3714170E+01 A6 = -6,9293120E+02 3,0511883E+03 3,3053120E+03 A8 = 9,7251984E+03 -2,0106561E+05 -4,0401573E+05 A10 = -3,6371788E+04 6,5587923E+06 2,7065100E+07 A12 = -7,4125717E+04 -1,1575782E+08 -1,0782668E+09 A14 = -2,1718610E+07 1,0455036E+09 2,6024544E+10 A16 = 5,1079377E+08 -3,7642350E+09 -3,7136018E+11 A18 = -4,1822558E+09 - 2,8635219E+12 A20 = 1,1881957E+10 - -9,1480427E+12 Surface # 6 8 9 k = -9,00000E+01 9,00000E+01 1,15666E-01 A4 = -1,3362997E+00 -2,2539027E+01 -1,1555960E+01 A6 = 1,0105292E+02 8,3250324E+02 1,2780572E+02 A8 = -4,4074692E+03 -3,2893902E+04 -1,0795651 E+03 A10 = 1,5244418E+04 9,4492769E+05 -5,2523383E+02 A12 = 4,9585604E+06 -1,8427147E+07 1,3996575E+05 A14 = -1,5238892E+08 2,4471996E+08 -1,7655067E+06 A16 = 1,9580962E+09 -2,1928280E+09 1,1542080E+07 A18 = -1,1890257E+10 1,2946477E+10 -4,4866488E+07 A20 = 2,7994930E+10 -4,8010572E+10 1,0402820E+08 A22 = - 1,0096261 E+11 -1,3275514E+08 A24 = - -9,1560985E+10 7,1683713E+07

[0136] In the 6th embodiment, the equation for the aspherical surface profiles of the aforementioned lens elements corresponds to the equation of the 1st embodiment. The definitions of the parameters listed in Table 6C also correspond to those of the 1st embodiment, with the corresponding values ​​for the 6th embodiment, so no further explanation is given here.

[0137] Furthermore, these parameters from Table 6A and Table 6B can be calculated as the following values ​​and satisfy the following conditions: TABLE 6C Schematic parameters f [mm] 1,12 R1 / CT1 1,32 FNO 2,00 CT1 / CT2 1,68 HFOV [Grade] 31,3 CT1 / T23 1,96 TL [mm] 1,220 T23 / CT3 0,51 TL / ImgH 1,77 CT3 / T12 2,10 TD / EPD 1,67 CTmax / CTmin 1,68 EPD / ImgH 0,81 V2 19,5 10×|f3 / f2| 3,99 V2+V3 43,0 f / R2 2,06 V1 / N1 36,27 f / R6 1,53 V2 / N2 11,68 |f / R3|+|f / R4| 0,87 V3 / N3 14,34 R2 / R6 0,75 Y3R2 / CT3 2,01 (R2-R3) / (R2+R3) -0,48 (|Sag2R1|+|Sag2R2|) / CT2 0,09 (R5+R6) / (R5-R6) 0,99 - - 7. Design

[0138] Fig. Figure 13 is a schematic representation of an image acquisition unit according to the 7th embodiment of the present disclosure. Fig. Figure 14 shows, 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 arrangement for photography (whose reference numeral is omitted) of the present disclosure and an image sensor IS. The optical lens arrangement for photography comprises, in order from the object side to the image side along an optical axis, an aperture ST, a first lens element E1, an aperture S1, a second lens element E2, an aperture S2, a third lens element E3, a filter E4, and an image area IMG. The optical lens arrangement for photography comprises three lens elements (E1, E2, and E3), with no additional lens element arranged between any three adjacent lens elements.

[0139] The first lens element E1, with positive refractive power, has an object-side surface that is convex in a paraxial region and an image-side surface that is concave in a paraxial region. The first lens element E1 is made of plastic and has both an aspherical object-side surface and an aspherical image-side surface. The image-side surface of the first lens element E1 has an inflection point.

[0140] The second lens element E2, with positive refractive power, has an object-side surface that is concave in a paraxial region and an image-side surface that is convex in a paraxial region. The second lens element E2 is made of plastic and has aspherical surfaces on both the object-side and image-side surfaces. The image-side surface of the second lens element E2 has an inflection point. The image-side surface of the second lens element E2 has a critical point in an off-axis region.

[0141] 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 and has aspheric surfaces on both the object-side and image-side surfaces. The object-side surface of the third lens element E3 has an inflection point. The image-side surface of the third lens element E3 has an inflection point. The image-side surface of the third lens element E3 has a critical point in an off-axis region.

[0142] The E4 filter is made of glass and is located between the third lens element E3 and the image area IMG. It does not affect the focal length of the optical lens assembly used for photography. The IS image sensor is located on or near the image area IMG of the optical lens assembly used for photography.

[0143] The detailed optical data of the 7th embodiment are listed in Table 7A and the data of the aspherical surface in Table 7B below. TABLE 7A 7. Design f = 1.13 mm, FNO = 2.00, HFOV = 29.9 degrees. Surface No. radius of curvature thickness material index Abbe #I Focal length 0 object Infinite Infinite 1 Fig. Aperture Plano -0,122 2 Lens 1 0,3542 (ASP) 0,261 plastic 1,544 56,0 0,95 3 0,8323 (ASP) 0,083 4 Aperture Plano 0,071 5 Lens 2 -4,5883 (ASP) 0,154 plastic 1,639 23,5 6,67 6 -2,2372 (ASP) 0,064 7 Aperture Plano 0,099 8 Lens 3 -1,8617 (ASP) 0,161 plastic 1,566 37,4 -1,02 9 0,8589 (ASP) 0,100 10 filter Plano 0,110 Glass 1,517 64,2 - 11 Plano 0,070 12 Picture Plano - Note: The reference wavelength is 587.6 nm (d-line). The effective radius of aperture S1 (surface 4) is 0.212 mm. The effective radius of aperture S2 (surface 7) is 0.391 mm. TABLE 7B Aspheric coefficients Surface No. 2 3 5 k = -1,65188E+01 -6,59805E+01 -8,89381E+01 A4 = 4,0862348E+01 9,2370301 E+00 -2,1184065E+01 A6 = -1,7279938E+03 1,4546908E+02 4,4128497E+03 A8 = 7,6759795E+04 -1,9660303E+04 -5,2734139E+05 A10 = -2,6615521E+06 6,8158209E+05 3,5364089E+07 A12 = 6,3520818E+07 -1,1417302E+07 -1,4260622E+09 A14 = -9,7472603E+08 8,8969463E+07 3,5108815E+10 A16 = 9,0951531E+09 -2,4628489E+08 -5,1461872E+11 A18 = -4,6698905E+10 - 4,1012620E+12 A20 = 1,0067557E+11 - -1,3606189E+13 Surface # 6 8 9 k = -4,59995E+01 -8,25327E+01 1,79259E-01 A4 = -5,1189557E+00 -1,5213411E+01 -1,5673451E+01 A6 = 3,8725276E+02 -3,9917133E+02 1,5412026E+02 A8 = -9,2146872E+03 3,9504969E+04 2,5000120E+02 A10 = -3,8437708E+04 -1,3385483E+06 -3,3581063E+04 A12 = 7,2746522E+06 2,5915020E+07 5,0560083E+05 A14 = -1,6662560E+08 -3,1714878E+08 -4,1167206E+06 A16 = 1,7766076E+09 2,5466298E+09 2,0849611E+07 A18 = -9,3438146E+09 -1,3447612E+10 -6,7056335E+07 A20 = 1,9534671E+10 4,5119690E+10 1,3210826E+08 A22 = - -8,7377733E+10 -1,4345347E+08 A24 = - 7,4423571 E+10 6,4371504E+07

[0144] In the 7th embodiment, the equation for the aspherical surface profiles of the aforementioned lens elements corresponds to the equation of the 1st embodiment. The definitions of the parameters listed in Table 7C also correspond to those of the 1st embodiment, with the corresponding values ​​for the 7th embodiment, so no further explanation is given here.

[0145] Furthermore, these parameters from Table 7A and Table 7B can be calculated as the following values ​​and satisfy the following conditions: TABLE 7C Schematic parameters f [mm] 1,13 R1 / CT1 1,36 FNO 2,00 CT1 / CT2 1,69 HFOV [Grade] 29,9 CT1 / T23 1,60 TL [mm] 1,173 T23 / CT3 1,01 TL / ImgH 1,70 CT3 / T12 1,05 TD / EPD 1,58 CTmax / CTmin 1,69 EPD / ImgH 0,82 V2 23,5 10×|f3 / f2| 1,52 V2+V3 60,9 f / R2 1,36 V1 / N1 36,27 f / R6 1,32 V2 / N2 14,34 |f / R3|+|f / R4| 0,75 V3 / N3 23,88 R2 / R6 0,97 Y3R2 / CT3 3,15 (R2-R3) / (R2+R3) -1,44 (|Sag2R1|+|Sag2R2|) / CT2 0,18 (R5+R6) / (R5-R6) 0,37 - - 8. Design

[0146] Fig.Figure 15 is a perspective view of an image acquisition unit according to the eighth 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 arrangement for photography disclosed in the first embodiment, a tube, and a retaining element (whose reference numerals have been omitted) for holding the optical lens arrangement for photography. However, the lens unit 101 can alternatively be provided with the optical lens arrangement for photography disclosed in other embodiments of the present disclosure, and the present disclosure is not limited thereto.The light being imaged is focused in the lens unit 101 of the image acquisition unit 100 in order to generate an image with the drive device 102, which is used for image focusing on the image sensor 103, which is then digitally transmitted to another electronic component for further processing.

[0147] The drive unit 102 can have an autofocus function, and different drive configurations can be achieved by using voice coil motors (VCMs), microelectromechanical systems (MEMS), piezoelectric systems, or shape memory alloys. The drive unit 102 is advantageous for achieving better image positioning of the lens unit 101, so that a clear image of the imaged object can be captured by the lens unit 101 at different object distances. The image sensor 103 (e.g., CCD or CMOS), which can be characterized by high light sensitivity and low noise, is positioned on the image surface of the optical lens assembly for photography to achieve higher image quality.

[0148] The image stabilizer 104, for example an accelerometer, a gyroscope, and a Hall-effect sensor, is configured to work in conjunction with the drive unit 102 to provide optical image stabilization (OIS). The drive unit 102, working in conjunction with the image stabilizer 104, is well suited to compensating for panning and tilting movements of the lens unit 101 to reduce blurring associated with movement during exposure. In some cases, compensation can be achieved through electronic image stabilization (EIS) using image processing software, thereby improving image quality in motion or low-light conditions. 9. Design

[0149] Fig. Figure 16 is a perspective view of an electronic device according to the 9th embodiment of the present disclosure. Fig.Figure 17 is another perspective view of the electronic device in Fig. 16.

[0150] In this embodiment, an electronic device 200 is a smartphone comprising the image acquisition unit 100, an image acquisition unit 100a, an image acquisition unit 100b, an image acquisition unit 100c, and a display unit 201 disclosed in the 8th embodiment. As in Fig. As shown in Figure 16, the image acquisition unit 100, the image acquisition unit 100a, and the image acquisition unit 100b are arranged on the same side of the electronic device 200 and point in the same direction, and each of the image acquisition units 100, 100a, and 100b has a single focal point. As shown in Fig.As shown in Figure 17, the image acquisition unit 100c and the display unit 201 are arranged on the opposite side of the electronic device 200, so that the image acquisition unit 100c can be a forward-facing camera of the electronic device 200 for taking selfies, but the present disclosure is not limited to this. Furthermore, each of the image acquisition units 100a, 100b, and 100c can include the optical lens arrangement for taking photographs as described in the present disclosure and have a similar configuration to the image acquisition unit 100.Specifically, each of the image acquisition units 100a, 100b and 100c can comprise a lens unit, a drive device, an image sensor and an image stabilizer, and each of the lens units can comprise an optical lens arrangement for photography, such as the optical lens arrangement for photography of the present disclosure, a tube and a holding element for holding the optical lens arrangement for photography.

[0151] Image capture unit 100 is a wide-angle image capture unit, image capture unit 100a is a telephoto image capture unit, image capture unit 100b is an ultra-wide-angle image capture unit, and image capture unit 100c is a wide-angle image capture unit. In this embodiment, image capture units 100, 100a, and 100b have different fields of view, so that the electronic device can have 200 different magnification ratios to meet the requirements of the optical zoom functionality. Furthermore, image capture unit 100c, as shown in Fig.As shown in Figure 17, the lens tube or lens elements in the image acquisition unit 100c may have one or more clipped edges at their outer diameter positions to conform to the non-circular opening. Therefore, it is advantageous to further reduce the length of the image acquisition unit 100c along a single axis, thereby reducing the overall size of the lens, increasing the area ratio of the display unit 201 to the electronic device 200, reducing the thickness of the electronic device 200, and achieving overall module compactness. In this embodiment, the electronic device 200 comprises several image acquisition units 100, 100a, 100b, and 100c, but the present disclosure is not limited to the number and arrangement of the image acquisition units. 10. Design

[0152] Fig.Figure 18 is a perspective view of an electronic device according to the 10th embodiment of the present disclosure. Fig. Figure 19 is another perspective view of the electronic device in Fig. 18. Fig. 20 is a block diagram of the electronic device in Fig. 18.

[0153] In this embodiment, an electronic device 300 is a smartphone comprising the image acquisition unit 100, an image acquisition unit 100d, an image acquisition unit 100e, an image acquisition unit 100f, an image acquisition unit 100g, a flash module 301, a focus assist module 302, an image signal processor 303, a display module 304, and an image software processor 305, all disclosed in the 8th embodiment. The image acquisition unit 100 and the image acquisition unit 100d are arranged on the same side of the electronic device 300. The focus assist module 302 can be a laser rangefinder or a ToF (Time of Flight) module, but the present disclosure is not limited to this.The image capture unit 100e, the image capture unit 100f, the image capture unit 100g, and the display module 304 are arranged on the opposite side of the electronic device 300, and the display module 304 can be a user interface, so that the image capture units 100e, 100f, and 100g can be front cameras of the electronic device 300 for taking selfies, but the present disclosure is not limited to this. Furthermore, each of the image capture units 100d, 100e, 100f, and 100g can include the optical lens arrangement for taking photographs as described in the present disclosure and have a similar configuration to the image capture unit 100.Specifically, each of the image acquisition units 100d, 100e, 100f and 100g can comprise a lens unit, a drive device, an image sensor and an image stabilizer, and each of the lens units can comprise an optical lens arrangement for photography, such as the optical lens arrangement for photography of the present disclosure, a tube and a holding element for holding the optical lens arrangement for photography.

[0154] Image acquisition unit 100 is a wide-angle image acquisition unit, image acquisition unit 100d is an ultra-wide-angle image acquisition unit, image acquisition unit 100e is a wide-angle image acquisition unit, image acquisition unit 100f is an ultra-wide-angle image acquisition unit, and image acquisition unit 100g is a ToF image acquisition unit. In this embodiment, image acquisition units 100 and 100d have different fields of view, so that the electronic device 300 can have different magnification ratios to meet the requirements of the optical zoom function. In addition, image acquisition unit 100g can determine depth information of the imaged object. In this embodiment, the electronic device 300 comprises multiple image acquisition units 100, 100d, 100e, 100f, and 100g, but the present disclosure is not limited to the number and arrangement of the image acquisition units.

[0155] When a user takes pictures of an object 306, the light beams converge in the image acquisition unit 100 or the image acquisition unit 100d to produce images, and the flash module 301 is activated for light assistance. The focus assist module 302 detects the object distance of the imaged object 306 to achieve fast autofocus. The image signal processor 303 is configured to optimize the captured image to improve image quality. The light beam emitted by the focus assist module 302 can be either conventional infrared light or laser light. Furthermore, the light beams can converge in the image acquisition unit 100e, 100f, or 100g to produce images. The display module 304 can include a touchscreen, and the user can interact with the display module 304 and the multi-functional image software processor 305 to capture images and perform image processing.Alternatively, the user can take pictures using a physical button. The image processed by the 305 image software processor can be displayed on the 304 display module. 11. Design

[0156] Fig. Figure 21 is a perspective view of an electronic device according to the 11th embodiment of the present disclosure.

[0157] In this embodiment, an electronic device 400 is a smartphone comprising the image capture unit 100, an image capture unit 100h, an image capture unit 100i, a flash module 401, a focus assist module, an image signal processor, a display module, and an image software processor (not shown) disclosed in the 8th embodiment. The image capture unit 100, the image capture unit 100h, and the image capture unit 100i are arranged on the same side of the electronic device 400, while the display module is arranged on the opposite side of the electronic device 400. Furthermore, each of the image capture units 100h and 100i may include the optical lens arrangement for photography described in the present disclosure and may have a similar configuration to the image capture unit 100, the details of which are not repeated here.

[0158] The image acquisition unit 100 is a wide-angle image acquisition unit, the image acquisition unit 100h is a telephoto image acquisition unit, and the image acquisition unit 100i is an ultra-wide-angle image acquisition unit. In this embodiment, the image acquisition units 100, 100h, and 100i have different fields of view, so that the electronic device 400 can have different magnification ratios to meet the requirements for the optical zoom function. Furthermore, the image acquisition unit 100h can be a telephoto image acquisition unit with a refractive element configuration, so that the overall length of the image acquisition unit 100h is not limited by the thickness of the electronic device 400. Moreover, the refractive element configuration of the image acquisition unit 100h can, for example, be one of those described in Fig. 25 to Fig. 27 structures shown may be similar to those described above. Fig. 25 to Fig.Reference can be made to Section 27, and the details relating thereto are not repeated. In this embodiment, the electronic device 400 comprises several image capture units 100, 100h, and 100i, but the present disclosure is not limited to the number and arrangement of the image capture units. When a user takes pictures of an object, light rays converge in the image capture unit 100, 100h, or 100i to produce images, and the flash module 401 is activated to assist the lighting. Furthermore, the subsequent processes are carried out in a similar manner to those in the embodiment described above, so the details relating thereto are not repeated. 12. Design

[0159] Fig. Figure 22 is a perspective view of an electronic device according to the 12th embodiment of the present disclosure.

[0160] 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 focus assist module, an image signal processor, a display module, and an image software processor (not shown) disclosed in the 8th 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 arrangement for photographing the present disclosure and have a similar configuration to the image acquisition unit 100, without the details relating thereto being specified again.

[0161] Image capture unit 100 is a wide-angle image capture unit, image capture unit 100j is a telephoto image capture unit, image capture unit 100k is a telephoto image capture unit, image capture unit 100m is a wide-angle image capture unit, image capture unit 100n is an ultra-wide-angle image capture unit, image capture unit 100p is an ultra-wide-angle image capture unit, image capture unit 100q is a telephoto image capture unit, image capture unit 100r is a telephoto image capture unit, and image capture unit 100s is a ToF image capture unit. In this embodiment, image capture units 100, 100j, 100k, 100m, 100n, 100p, 100q, and 100r have different fields of view, allowing the electronic device to have 500 different magnification ratios to meet the requirements of optical zoom functionality.Furthermore, each of the 100j and 100k image acquisition units can be a telephoto image acquisition unit with a refractive element configuration. In addition, the refractive element configuration of each of the 100j and 100k image acquisition units can, for example, be one of those in . Fig. 25 to Fig. 27 structures shown may be similar to those described above. Fig. 25 to Fig.Reference can be made to Section 27, and the relevant details are not stated again. Furthermore, the image acquisition unit 100s can determine depth information of the imaged object. In this embodiment, the electronic device 500 comprises multiple image acquisition units 100, 100j, 100k, 100m, 100n, 100p, 100q, 100r, and 100s, but the present disclosure is not limited to the number and arrangement of the image acquisition units. When a user takes pictures of an object, the light rays converge in the image acquisition unit 100, 100j, 100k, 100m, 100n, 100p, 100q, 100r, or 100s to produce images, and the flash module 501 is activated to assist the lighting. Furthermore, the subsequent processes are carried out in a similar manner to those in the embodiments mentioned above, and the details thereof are not repeated here.

[0162] The smartphone in several embodiments serves only as an example to illustrate the image acquisition unit installed in an electronic device according to the present disclosure, and the present disclosure is not limited to it. The image acquisition unit can optionally be applied to optical systems with movable focus. Furthermore, the optical lens arrangement for photographing the image acquisition unit is characterized by good aberration correction capability and high image quality and can be used for 3D image acquisition applications (three-dimensional image acquisition) in products such as digital cameras, mobile devices, digital tablets, smart televisions, network surveillance devices, dashboard cameras, vehicle reversing cameras, multi-camera devices, image recognition systems, motion sensor input devices, portable devices, and other electronic imaging devices.

[0163] The foregoing description has been provided for illustrative purposes with reference to specific embodiments. It should be noted that TABLES 1A-8C show different data for the various embodiments; however, the data for the different embodiments were obtained experimentally. The embodiments were selected and described to best illustrate the principles of the disclosure and their practical applications, so that other skilled persons may make the best possible use of the disclosure and of the various embodiments with different modifications suitable for their respective intended uses. The embodiments shown above and the accompanying drawings are exemplary and are not intended to be exhaustive, nor are they intended to limit the scope of this disclosure to the forms exactly disclosed. In view of the teachings above, many modifications and variations are possible.

Claims

[1] An optical lens arrangement for photography comprising three lens elements (E1, E2, E3), wherein the three lens elements (E1, E2, E3) are arranged in the order from the object side to the image side along a ray path as a first lens element (E1), a second lens element (E2) and a third lens element (E3), and each of the three lens elements (E1, E2, E3) has an object-side surface oriented towards the object side and an image-side surface oriented towards the image side; wherein the first lens element (E1) has a positive 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 third lens element (E3) has a negative refractive power, the image-side surface of the third lens element (E3) is concave in a paraxial region thereof, and the image-side surface of the third lens element (E3) has at least one inflection point (P); where the Abbe number of the second lens element (E2) is V2, the Abbe number of the third lens element (E3) is V3, the focal length of the second lens element (E2) is f2, the focal length of the third lens element (E3) is f3, the central thickness of the third lens element (E3) is CT3, the axial distance between the first lens element (E1) and the second lens element (E2) is T12, the radius of curvature of the object-side surface of the third lens element (E3) is R5, the radius of curvature of the image-side surface of the third lens element (E3) is R6, and the following conditions are met: 10.0 <V2+V3<70,0; 0<10×|f3 / f2|<4.50; 0.40 <CT3 / T12<2,50; und 0<(R5+R6) / (R5−R6)<2,00. [2] The optical lens arrangement for photography according to claim 1, wherein the Abbe number of the second lens element (E2) is V2, the Abbe number of the third lens element (E3) is V3 and the following condition is met: 20.0 <V2+V3<65,0. [3] The optical lens arrangement for photography according to claim 1, wherein the image-side surface of the second lens element (E2) is convex in a paraxial region thereof; wherein the focal length of the second lens element (E2) is f2, the focal length of the third lens element (E3) is f3 and the following condition is met: 0,01<10×|f3 / f2|<3,00. [4] The optical lens arrangement for photography according to claim 1, wherein the object-side surface of the third lens element (E3) is concave in a paraxial region thereof; wherein the mean thickness of the third lens element (E3) is CT3, the axial distance between the first lens element (E1) and the second lens element (E2) is T12 and the following condition is met: 0.60 <CT3 / T12<1,75. [5] The optical lens arrangement for photography according to claim 1, wherein the focal length of the optical lens arrangement for photography is f, the radius of curvature of the object-side surface of the second lens element (E2) is R3, the radius of curvature of the image-side surface of the second lens element (E2) is R4 and the following condition is met: 0.30<|f / R3|+|f / R4|<1.

00. [6] The optical lens arrangement for photography according to claim 1, wherein the radius of curvature of the image-side surface of the first lens element (E1) is R2, the radius of curvature of the object-side surface of the second lens element (E2) is R3 and the following condition is met: −3.00<(R2−R3) / (R2+R3)<0. [7] The optical lens arrangement for photography according to claim 1, wherein the mean thickness of the first lens element (E1) is CT1, the mean thickness of the second lens element (E2) is CT2 and the following condition is met: 1.30 <CT1 / CT2<2,30. [8] The optical lens arrangement for photography according to claim 1, wherein the axial distance between the second lens element (E2) and the third lens element (E3) is T23, the mean thickness of the third lens element (E3) is CT3 and the following condition is met: 0.50 <T23 / CT3<1,30. [9] The optical lens arrangement for photography according to claim 1, wherein the Abbe number of the second lens element (E2) is V2 and the following condition is met: 10.0 <V2<25,0. [10] The optical lens arrangement for photography according to claim 1, wherein the maximum effective radius of the image-side surface of the third lens element (E3) is Y3R2, the mean thickness of the third lens element (E3) is CT3 and the following condition is met: 1.50 <Y3R2 / CT3<4,00. [11] The optical lens arrangement for photography according to claim 1, wherein a displacement parallel to an optical axis from an axial vertex on the object-side surface of the second lens element (E2) to a position with maximum effective radius on the object-side surface of the second lens element (E2) is Sag2R1, a displacement parallel to the optical axis from an axial vertex on the image-side surface of the second lens element (E2) to a position with maximum effective radius on the image-side surface of the second lens element (E2) is Sag2R2, a central thickness of the second lens element (E2) is CT2 and the following condition is met: 0.03<(|Sag2R1|+|Sag2R2|) / CT2<0.

25. [12] Image acquisition unit (100), comprising: the optical lens arrangement for photography according to claim 1; and an image sensor (103) which is arranged on an image area (IMG) of the optical lens arrangement for photographing. [13] Electronic device (200) comprising: the image acquisition unit (100) according to claim 12. [14] The optical lens arrangement for photography, comprising three lens elements (E1, E2, E3), wherein the three lens elements (E1, E2, E3) are arranged in order from the object side to the image side along a ray path as a first lens element (E1), a second lens element (E2) and a third lens element (E3), and each of the three lens elements (E1, E2, E3) has an object-side surface oriented towards the object side and an image-side surface oriented towards the image side; wherein the first lens element (E1) has a positive 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 third lens element (E3) has a negative refractive power, the image-side surface of the third lens element (E3) is concave in a paraxial region thereof, and the image-side surface of the third lens element (E3) has at least one critical point (C) in an off-axis region thereof; where the Abbe number of the second lens element (E2) is V2, the Abbe number of the third lens element (E3) is V3, the focal length of the optical lens arrangement for photography is f, the focal length of the second lens element (E2) is f2, the focal length of the third lens element (E3) is f3, the radius of curvature of the image-side surface of the first lens element (E1) is R2, and the following conditions are met: 10.0 <V2+V3<70,0; 0<10×|f3 / f2|<4.50; and 0.80 <f / R2<2,50; where the Abbe number of the first lens element (E1) is V1, the Abbe number of the second lens element (E2) is V2, the Abbe number of the third lens element (E3) is V3, the Abbe number of the i-th lens element is Vi, the refractive index of the first lens element (E1) is N1, the refractive index of the second lens element (E2) is N2, the refractive index of the third lens element (E3) is N3, the refractive index of the i-th lens element is Ni, and at least one lens element of the optical lens arrangement for photography satisfies the following condition: 5.00 <Vi / Ni<14,50, wobei i=1,2 oder 3 ist. [15] The optical lens arrangement for photography according to claim 14, wherein the Abbe number of the second lens element (E2) is V2, the Abbe number of the third lens element (E3) is V3 and the following condition is met: 20.0 <V2+V3<65,0. [16] The optical lens arrangement for photography according to claim 14, wherein the focal length of the optical lens arrangement for photography is f, the radius of curvature of the image-side surface of the first lens element (E1) is R2 and the following condition is met: 0.90 <f / R2<2,30. [17] The optical lens arrangement for photography according to claim 14, wherein the Abbe number of the first lens element (E1) is V1, the Abbe number of the second lens element (E2) is V2, the Abbe number of the third lens element (E3) is V3, the Abbe number of the i-th lens element is Vi, the refractive index of the first lens element (E1) is N1, the refractive index of the second lens element (E2) is N2, the refractive index of the third lens element (E3) is N3, the refractive index of the i-th lens element is Ni, and at least one lens element of the optical lens arrangement for photography satisfies the following condition: 8.00 <Vi / Ni<12,50, wobei i=1,2 oder 3 ist. [18] The optical lens arrangement for photography according to claim 14, wherein a maximum value among the mean thicknesses of all lens elements of the optical lens arrangement for photography is CTmax, a minimum value among the mean thicknesses of all lens elements of the optical lens arrangement for photography is CTmin and the following condition is met: 1.45 <CTmax / CTmin<2,20. [19] The optical lens arrangement for photography according to claim 14, wherein the radius of curvature of the object-side surface of the first lens element (E1) is R1, the mean thickness of the first lens element (E1) is CT1 and the following condition is met: 1.00 <R1 / CT1<1,50. [20] The optical lens arrangement for photography according to claim 14, wherein the object-side surface of the second lens element (E2) is concave in a paraxial region thereof; wherein the axial distance between the object-side surface of the first lens element (E1) and an image surface (IMG) is TL, the maximum image height of the optical lens arrangement for photographing ImgH is and the following condition is met: 1.40 <TL / ImgH<2,00. [21] The optical lens arrangement for photography according to claim 14, wherein an entrance pupil diameter of the optical lens arrangement for photography is EPD, a maximum image height of the optical lens arrangement for photography is ImgH and the following condition is met: 0.70 <EPD / ImhH<0,90. [22] The optical lens arrangement for photography, comprising three lens elements (E1, E2, E3), wherein the three lens elements (E1, E2, E3) are arranged in order from the object side to the image side along a ray path as a first lens element (E1), a second lens element (E2) and a third lens element (E3), and each of the three lens elements (E1, E2, E3) has an object-side surface oriented towards the object side and an image-side surface oriented towards the image side; wherein the first lens element (E1) has a positive 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 third lens element (E3) has a negative refractive power, the image-side surface of the third lens element (E3) is concave in a paraxial region thereof, and the image-side surface of the third lens element (E3) has at least one critical point (C) in an off-axis region thereof; where the Abbe number of the second lens element (E2) is V2, the Abbe number of the third lens element (E3) is V3, the focal length of the second lens element (E2) is f2, the focal length of the third lens element (E3) is f3, the radius of curvature of the image-side surface of the first lens element (E1) is R2, the radius of curvature of the image-side surface of the third lens element (E3) is R6, the axial distance between the object-side surface of the first lens element (E1) and the image-side surface of the third lens element (E3) is TD, the entrance pupil diameter of the optical lens arrangement for photography is EPD, and the following conditions are met: 10.0 <V2+V3<70,0; 0<10×|f3 / f2|<7.00; 0 <R2 / R6<2,00; und 1.00 <TD / EPD<1,80. [23] The optical lens arrangement for photography according to claim 22, wherein the Abbe number of the second lens element (E2) is V2, the Abbe number of the third lens element (E3) is V3 and the following condition is met: 30.0 <V2+V3<63,0. [24] The optical lens arrangement for photography according to claim 22, wherein the radius of curvature of the image-side surface of the first lens element (E1) is R2, the radius of curvature of the image-side surface of the third lens element (E3) is R6 and the following condition is met: 0.50 <R2 / R6<1,75. [25] The optical lens arrangement for photography according to claim 22, wherein the focal length of the optical lens arrangement for photography is f, the radius of curvature of the image-side surface of the third lens element (E3) is R6 and the following condition is met: 0.70 <f / R6<2,00. [26] The optical lens arrangement for photography according to claim 22, wherein the mean thickness of the first lens element (E1) is CT1, the axial distance between the second lens element (E2) and the third lens element (E3) is T23 and the following condition is met: 1.40 <CT1 / T23<2,40. [27] The optical lens arrangement for photography according to claim 22, wherein an aperture number of the optical lens arrangement for photography is FNO, half of a maximum field of view of the optical lens arrangement for photography is HFOV and the following conditions are met: 1.80 <FNO<2,20; und 26.0 degrees <HFOV<35,0 Grad. [28] The optical lens arrangement for photography according to claim 22, wherein an axial distance between the object-side surface of the first lens element (E1) and an image plane (IMG) TL is, a focal length of the optical lens arrangement for photography is f and the following conditions are met: 0.500 mm <TL<1,800 mm; und 0.80 mm <f<1,50 mm. [29] The optical lens arrangement for photography according to claim 22, wherein the Abbe number of the second lens element (E2) is V2, the Abbe number of the third lens element (E3) is V3, a focal length of the optical lens arrangement for photography is f, the focal length of the second lens element (E2) is f2, the focal length of the third lens element (E3) is f3, the mean thickness of the third lens element (E3) is CT3, the axial distance between the first lens element (E1) and the second lens element (E2) is T12, the radius of curvature of the image-side surface of the first lens element (E1) is R2, the radius of curvature of the object-side surface of the third lens element (E3) is R5, the radius of curvature of the image-side surface of the third lens element (E3) is R6, the axial distance between the object-side surface of the first lens element (E1) and the image-side surface of the third lens element (E3) is R6. The surface area of ​​the third lens element (E3) TD is,the entrance pupil diameter of the optical lens arrangement for photography (EPD) is and the following conditions are met:, 36.7≤V2+V3≤60.9; 0.11≤10×|f3 / f2|≤3.99; 0.81≤CT3 / T12≤2.10; 0.37≤(R5+R6) / (R5−R6)≤1.52; 1.07≤f / R2≤2.06; 0.69≤R2 / R6≤1.50; and 1.56≤TD / EPD≤1.68; where the Abbe number of the first lens element (E1) is V1, the Abbe number of the second lens element (E2) is V2, the Abbe number of the third lens element (E3) is V3, the Abbe number of the i-th lens element is Vi, the refractive index of the first lens element (E1) is N1, the refractive index of the second lens element (E2) is N2, the refractive index of the third lens element (E3) is N3, the refractive index of the i-th lens element is Ni, and at least one lens element of the optical lens arrangement for photography satisfies the following condition: 9.61≤Vi / Ni≤14.34, where i=1,2 or 3.

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