Photographic optical lens assembly, image acquisition unit and electronic device

Abstract

Photographic optical lens assembly comprising five lens elements (E1, E2, E3, E4, E5), wherein the five lens elements (E1, E2, E3, E4, E5) are arranged in the order from an object side to an image side along an optical path as a first lens element (E1), a second lens element (E2), a third lens element (E3), a fourth lens element (E4) and a fifth lens element (E5), and wherein each of the five lens elements (E1, E2, E3, E4, E5) has an object-side surface facing the object side and an image-side surface facing the image side; wherein each of the object-side surface and the image-side surface of the first lens element (E1) has a central region (AC1, AC2) and a peripheral region (AP1, AP2), the peripheral region (AP1) of the object-side surface of the first lens element (E1) has a first refractive surface (E1_1), the peripheral region (AP2) of the image-side surface of the first lens element (E1) has a first reflective surface (E1_2), the central region (AC1) of the object-side surface of the first lens element (E1) has a second reflective surface (E1_3), and the central region (AC2) of the image-side surface of the first lens element (E1) has a second refractive surface (E1_4); where DM2M1i is a distance parallel to a central axis between an axial vertex on the second reflecting surface (E1_3) and a position with minimum effective radius on the first reflecting surface (E1_2), DM2R4 is an axial distance between the second reflecting surface (E1_3) and the image-side surface of the second lens element (E2), DM2I is an axial distance between the second reflecting surface (E1_3) and an image surface (IMG), f is a focal length of the photographic optical lens assembly, T34 is an axial distance between the third lens element (E3) and the fourth lens element (E4), T45 is an axial distance between the fourth lens element (E4) and the fifth lens element (E5), and the following conditions are satisfied: 0.30 < DM 2 M 1 i / DM2R4 < 1.00 ; 0.35 < DM2I / f < 0.80 ; and 0.05 < T45 / T34 < 2.50.

Description

BACKGROUNDTechnical area

[0001] The present disclosure relates to a photographic optical lens assembly, an image capturing unit, and an electronic device, particularly to a photographic optical lens assembly and an image capturing unit applicable to an electronic device. Description of related technology

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

[0003] Furthermore, due to rapid technological change, the trend in electronic devices equipped with optical systems is moving toward multifunctionality for various applications, so the requirements for the functionality of optical systems have increased. However, for a conventional optical system, it is difficult to achieve a balance between requirements such as telephoto lens, 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, a photographic optical lens assembly includes five lens elements. The five lens elements are, in order from an object side to an image side along an optical path, a first lens element, a second lens element, a third lens element, a fourth lens element, and a fifth lens element. Each of the five lens elements has an object-side surface facing the object side and an image-side surface facing the image side.

[0005] Preferably, each of the object-side surface and the image-side surface of the first lens element has a central region and an edge region. Preferably, the edge region of the object-side surface of the first lens element has a first refractive surface. Preferably, the edge region of the image-side surface of the first lens element has a first reflective surface. Preferably, the central region of the object-side surface of the first lens element has a second reflective surface. Preferably, the central region of the image-side surface of the first lens element has a second refractive surface.

[0006] When a distance parallel to a central axis between an axial vertex on the second reflecting surface and a position with a minimum effective radius on the first reflecting surface is DM2M1i, an axial distance between the second reflecting surface and the image-side surface of the second lens element is DM2R4, an axial distance between the second reflecting surface and an image surface is DM2I, a focal length of the photographic optical lens assembly is f, an axial distance between the third lens element (E3) and the fourth lens element (E4) is T34, an axial distance between the fourth lens element (E4) and the fifth lens element (E5) is T45, and a focal length of the photographic optical lens assembly is f, the following conditions are preferably met: 0.30 <DM2M1i / DM2R4<1,00; 0.35 <DM2I / f<0,80; und 0.05 <T45 / T34<2,50.

[0007] According to another aspect of the present disclosure, a photographic optical lens assembly includes five lens elements. The five lens elements are, in order from an object side to an image side along an optical path, a first lens element, a second lens element, a third lens element, a fourth lens element, and a fifth lens element. Each of the five lens elements has an object-side surface facing the object side and an image-side surface facing the image side.

[0008] Preferably, each of the object-side surface and the image-side surface of the first lens element has a central region and an edge region. Preferably, the edge region of the object-side surface of the first lens element has a first refractive surface. Preferably, the edge region of the image-side surface of the first lens element has a first reflective surface. Preferably, the central region of the object-side surface of the first lens element has a second reflective surface. Preferably, the central region of the image-side surface of the first lens element has a second refractive surface. Preferably, the second lens element has a negative refractive power. Preferably, the image-side surface of the second lens element is concave in a paraxial region thereof.

[0009] When a radius of curvature of the object-side surface of the second lens element is R3, a radius of curvature of the image-side surface of the second lens element is R4, and a refractive index of the second lens element is N2, the following conditions are preferably satisfied: 0.10<(R3+R4) / (R3−R4)<5.00; and 1,520 <N2<1,750.

[0010] According to another aspect of the present disclosure, an image capturing unit comprises one of the aforementioned photographic optical lens assemblies and an image sensor, wherein the image sensor is arranged on the image surface of the photographic optical lens assembly.

[0011] According to another aspect of the present disclosure, an electronic device comprises the aforementioned image capture unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The disclosure can be better understood by reading the following detailed description of the embodiments with reference to the accompanying drawings: Fig. 1 is a schematic view of an image acquisition unit according to the first embodiment of the present disclosure; Fig. 2 shows spherical aberration curves, astigmatic field curves and a distortion curve of the image acquisition unit according to the first embodiment; Fig. 3 is a schematic view of an image acquisition unit according to the second embodiment of the present disclosure; Fig. 4 shows spherical aberration curves, astigmatic field curves and a distortion curve of the image acquisition unit according to the second embodiment; Fig. 5 is a schematic view of an image acquisition unit according to the third embodiment of the present disclosure; Fig.6 shows spherical aberration curves, astigmatic field curves and a distortion curve of the image sensing unit according to the third embodiment; Fig. 7 is a schematic view of an image acquisition unit according to the 4th embodiment of the present disclosure; Fig. 8 shows spherical aberration curves, astigmatic field curves and a distortion curve of the image sensing unit according to the 4th embodiment; Fig. 9 is a schematic view of an image acquisition unit according to the 5th embodiment of the present disclosure; Fig. 10 shows spherical aberration curves, astigmatic field curves and a distortion curve of the image sensing unit according to the 5th embodiment; Fig. 11 is a schematic view of an image acquisition unit according to the 6th embodiment of the present disclosure; Fig.12 shows spherical aberration curves, astigmatic field curves and a distortion curve of the image sensing unit according to the 6th embodiment; Fig. 13 is a schematic view of an image acquisition unit according to the 7th embodiment of the present disclosure; Fig. 14 shows spherical aberration curves, astigmatic field curves and a distortion curve of the image sensing unit according to the 7th embodiment; Fig. 15 is a schematic view of an image acquisition unit according to the 8th embodiment of the present disclosure; Fig. 16 shows spherical aberration curves, astigmatic field curves and a distortion curve of the image sensing unit according to the 8th embodiment; Fig. 17 is a perspective view of an image acquisition unit according to the 9th embodiment of the present disclosure; Fig.18 is a perspective view of an electronic device according to the 10th embodiment of the present disclosure; Fig. 19 is another perspective view of the electronic device in Fig. 18; Fig. 20 is a perspective view of an electronic device according to the 11th embodiment of the present disclosure; Fig. 21 is another perspective view of the electronic device in Fig. 20; Fig. 22 is a block diagram of the electronic device in Fig. 20; Fig. 23 is a perspective view of an electronic device according to the 12th embodiment of the present disclosure; Fig. 24 is a perspective view of an electronic device according to the 13th embodiment of the present disclosure; Fig.25 shows a schematic view of inflection points on lens surfaces, critical points on lens surfaces, DM2M1i, DM2R2, DM2R4, DM21 and Sag4R1 according to the first embodiment of the present disclosure; and Fig. 26 shows a schematic view of light blocking regions, central regions, edge regions, YT1o, YT1i, YM1o, YM1i, YM2 and YT2 according to the first embodiment of the present disclosure. DETAILED DESCRIPTION

[0013] A photographic optical lens assembly comprises five lens elements. The five lens elements are, in order from an object side to an image side along an optical path, a first lens element, a second lens element, a third lens element, a fourth lens element, and a fifth lens element. Each of the five lens elements has an object-side surface facing the object side and an image-side surface facing the image side.

[0014] Each of the object-side surface and the image-side surface of the first lens element has a central region and a peripheral region. Therefore, it is advantageous to improve the space utilization of the photographic optical lens assembly by the area-division design at different effective radii of the lens element. Reference is made to Fig.26, which shows a schematic view of the central region AC1 of the object-side surface of the first lens element, the central region AC2 of the image-side surface of the first lens element, the edge region AP1 of the object-side surface of the first lens element, and the edge region AP2 of the image-side surface of the first lens element according to the first embodiment of the present disclosure.

[0015] The edge region of the object-side surface of the first lens element has a first refractive surface, the edge region of the image-side surface of the first lens element has a first reflective surface, the central region of the object-side surface of the first lens element has a second reflective surface, and the central region of the image-side surface of the first lens element has a second refractive surface. Therefore, it is advantageous to reduce the number of components and the cost without disposing an additional reflective element, and it is also advantageous to increase design flexibility in the reflective region and reduce assembly errors by disposing the reflective surface on the lens element. Reference is made to Fig.26, which shows a schematic view of the first refractive surface E1_1, the first reflective surface E1_2, the second reflective surface E1_3, and the second refractive surface E1_4 according to the first embodiment of the present disclosure. Note that the first reflective surface E1_2 faces the object side, and the second reflective surface E1_3 faces the image side.

[0016] Along the movement sequence of the optical path, incident light may enter the first lens element via the first refractive surface, then be reflected by the first reflective surface, subsequently be reflected by the second reflective surface, and finally exit the first lens element via the second refractive surface. Furthermore, the second refractive surface may be convex in a paraxial region thereof. Therefore, it is advantageous to effectively compensate and adjust the propagation direction of the reflected light and effectively adjust the angle of incidence of the light entering the lens element at the image end to prevent distortion. The paraxial region refers to a region near a central axis. Reference is made to Fig. 25, which shows a schematic view of the central axis CA according to the first embodiment of the present disclosure.

[0017] The second lens element may have a negative refractive power. Therefore, it is advantageous to adjust the refractive power of the second lens element to adjust the propagation direction of the peripheral light, thereby maintaining the relative illuminance at the edge. Furthermore, the image-side surface of the second lens element may be concave in a paraxial region thereof. Therefore, it is advantageous to balance the direction of the optical path and correct the spherical aberration of the photographic optical lens assembly, thereby maintaining a suitable back focal length thereof. Furthermore, the second lens element may be arranged closer to the image side than the first reflective surface. Therefore, it is advantageous to smooth every region of the image-side surface of the first lens element, thereby simplifying the manufacturing difficulty of the first lens element.

[0018] According to the present disclosure, the object-side surface of the first lens element may further include a light-blocking region disposed between the central region and the peripheral region thereof, and the image-side surface of the first lens element may further include a light-blocking region disposed between the central region and the peripheral region thereof. Therefore, it is advantageous to prevent the formation of stray light when incident light is reflected multiple times, thereby reducing unwanted light spots and thus improving image quality. Reference is made to Fig.26, which shows a schematic view of the light-blocking region AB1 of the object-side surface of the first lens element and the light-blocking region AB2 of the image-side surface of the first lens element according to the first embodiment of the present disclosure. Note that the light-blocking region may include a frosting film or an optical spray layer. The frosting film may be a membrane layer composed of a metal membrane layer and an oxide membrane layer. The optical spray layer may be a dark coating layer with a light-absorbing function, such as a black ink spray layer formed by epoxy resin or quick-drying ink containing polyacrylate as a base, a blackened coating layer by chemical vapor deposition, or a photoresistive coating layer.The optical spray coating is easy to apply to a component surface and adheres well to it and is suitable for mass production.

[0019] According to the present disclosure, each of the second lens element to the fifth lens element may be a plastic lens element. Therefore, it is advantageous to increase the plasticity of lens elements, to easily manufacture lens elements, and to reduce manufacturing costs.

[0020] According to the present disclosure, at least one of the object-side surface and the image-side surface of at least one lens element from the second lens element to the fifth lens element may have at least one inflection point. Therefore, it is advantageous to increase flexibility in optical design to correct aberrations. Reference is made to Fig.25, which is a schematic view of the inflection points P on the object-side surface of the second lens element E2, the image-side surface of the second lens element E2, the object-side surface of the third lens element E3, the image-side surface of the third lens element E3, the object-side surface of the fourth lens element E4, the image-side surface of the fourth lens element E4, the object-side surface of the fifth lens element E5, and the image-side surface of the fifth lens element E5 according to the first embodiment of the present disclosure.The above-mentioned inflection points P on the object-side surface of the second lens element E2, the image-side surface of the second lens element E2, the object-side surface of the third lens element E3, the image-side surface of the third lens element E3, the object-side surface of the fourth lens element E4, the image-side surface of the fourth lens element E4, the object-side surface of the fifth lens element E5 and the image-side surface of the fifth lens element E5 in . Fig. 25 are exemplary. Each of the lens surfaces in various embodiments of the present disclosure may also have one or more inflection points.

[0021] According to the present disclosure, at least one of the object-side surface and the image-side surface of at least one lens element from the second lens element to the fifth lens element may have at least one critical point in an off-axis region thereof. Therefore, it is advantageous to further increase flexibility in optical design, thereby correcting and compensating for aberrations in the peripheral image. Reference is made to Fig.25, which is a schematic view of the critical points C on the object-side surface of the second lens element E2, the object-side surface of the third lens element E3, the image-side surface of the third lens element E3, the object-side surface of the fourth lens element E4, the image-side surface of the fourth lens element E4, and the object-side surface of the fifth lens element E5 according to the first embodiment of the present disclosure. The above-mentioned critical points C on the object-side surface of the second lens element E2, the object-side surface of the third lens element E3, the image-side surface of the third lens element E3, the object-side surface of the fourth lens element E4, the image-side surface of the fourth lens element E4, and the object-side surface of the fifth lens element E5 in Fig.25 are exemplary. Each of the lens surfaces in various embodiments of the present disclosure may also have one or more critical points in an off-axis region thereof.

[0022] When a distance parallel to the central axis between an axial vertex on the second reflecting surface and a position of the minimum effective radius on the first reflecting surface is DM2M1i, and an axial distance between the second reflecting surface and the image-side surface of the second lens element is DM2R4, the following condition can be satisfied: 0.30 < DM2M1i / DM2R4 < 1.00. Therefore, it is advantageous to reduce the thickness difference between the peripheral region and the central region of the first lens element by reducing the horizontal distance between the first reflecting surface and the second reflecting surface, thereby reducing stray light and simplifying manufacturing difficulty. In addition, the following condition can also be satisfied: 0.50 < DM2M1i / DM2R4 < 0.95. In addition, the following condition can also be satisfied: 0.60 < DM2M1i / DM2R4 < 0.92.In addition, the following condition may be met: 0.65 < DM2M1i / DM2R4 < 0.90. Furthermore, the following condition may be met: 0.70 ≤ DM2M1i / DM2R4 ≤ 0.89. Reference is made to . Fig. 25, which shows a schematic view of DM2M1i and DM2R4 according to the first embodiment of the present disclosure.

[0023] When the axial distance between the second reflecting surface and the image surface is DM21 and the focal length of the photographic optical lens assembly is f, the following condition can be satisfied: 0.35 < DM21 / f < 0.80. Therefore, it is advantageous for achieving an ultra-thin optical system with a telephoto lens specification, thereby reducing the overall size of the photographic optical lens assembly. Furthermore, the following condition can also be satisfied: 0.40 < DM2I / f < 0.60. Furthermore, the following condition can also be satisfied: 0.43 < DM2I / f < 0.55. Furthermore, the following condition can also be satisfied: 0.47 ≤ DM2I / f ≤ 0.51.

[0024] Reference is made to Fig. 25, which shows a schematic view of DM2I according to the first embodiment of the present disclosure.

[0025] When the radius of curvature of the object-side surface of the second lens element is R3 and the radius of curvature of the image-side surface of the second lens element is R4, the following condition can be satisfied: 0.10 < (R3+R4) / (R3-R4) < 5.00. Therefore, it is advantageous to effectively balance the radii of curvature of the object-side surface and the image-side surface of the second lens element to adjust the propagation direction of peripheral light, thereby correcting aberrations of the photographic optical lens assembly and reducing stray light within the optical lens. Furthermore, the following condition can also be satisfied: 0.20 < (R3+R4) / (R3-R4) < 3.00. Furthermore, the following condition can also be satisfied: 0.30 < (R3+R4) / (R3-R4) < 2.00. In addition, the following condition can also be met: 0.37 ≤ (R3+R4) / (R3-R4) ≤ 1.08.

[0026] When the refractive index of the second lens element is N2, the following condition can be satisfied: 1.520 < N2 < 1.750. Therefore, it is advantageous to adjust the refractive index of the second lens element to control the propagation direction of the reflected light, thereby adjusting the back focal length and increasing the image height. In addition, the following condition can also be satisfied: 1.560 < N2 < 1.720. Furthermore, the following condition can also be satisfied: 1.600 < N2 < 1.700. Furthermore, the following condition can also be satisfied: 1.614 ≤ N2 ≤ 1.686.

[0027] When the radius of curvature of the image-side surface of the second lens element is R4 and the radius of curvature of the object-side surface of the fifth lens element is R9, the following condition can be satisfied: -10.00 < (R4+R9) / (R4-R9) < 0. Therefore, it is advantageous to effectively balance the radii of curvature of the image-side surface of the second lens element and the object-side surface of the fifth lens element, so that the image-side surface of the second lens element can have a relatively strong deflection ability to control the direction of the optical path. In addition, the following condition can also be satisfied: -5.00 < (R4+R9) / (R4-R9) < -0.05. Furthermore, the following condition can also be satisfied: -3.00 < (R4+R9) / (R4-R9) < -0.20.

[0028] When an axial distance between the second reflecting surface and the second refractive surface is DM2R2, a central thickness of the second lens element is CT2, a central thickness of the third lens element is CT3, a central thickness of the fourth lens element is CT4, and a central thickness of the fifth lens element is CT5, the following condition can be satisfied: 1.00 < DM2R2 / (CT2+CT3+CT4+CT5) < 2.50. Therefore, it is advantageous to equalize the ratio of the central thickness between the lens elements at the front and rear ends to facilitate lens assembly and increase yield. In addition, the following condition can also be satisfied: 1.05 < DM2R2 / (CT2+CT3+CT4+CT5) < 2.00. Reference is made to Fig. 25, which shows a schematic view of DM2R2 according to the first embodiment of the present disclosure.

[0029] When the focal length of the second lens element is f2 and the focal length of the fifth lens element is f5, the following condition can be satisfied: 0 < 10×|f2 / f5| < 9.00. Therefore, it is advantageous to have a relatively strong refractive power of the second lens element, which is balanced by the fifth lens element, thereby reducing the total optical track length and correcting off-axis aberrations. Furthermore, the following condition can also be satisfied: 0.01 < 10×|f2 / f5| < 7.00. Furthermore, the following condition can also be satisfied: 0.20 < 10×|f2 / f5| < 6.00.

[0030] When the axial distance between the first lens element and the second lens element is T12, and the axial distance between the third lens element and the fourth lens element is T34, the following condition can be satisfied: 0 < T12 / T34 < 1.20. Therefore, it is advantageous to have sufficient space between the third lens element and the fourth lens element to achieve various application designs. Furthermore, the following condition can also be satisfied: 0.01 < T12 / T34 < 1.00. Furthermore, the following condition can also be satisfied: 0.03 < T12 / T34 < 0.80.

[0031] When a maximum effective radius of the first refractive surface is YT1o and the axial distance between the second reflecting surface and the second refractive surface is DM2R2, the following condition can be satisfied: 1.50 < YT1o / DM2R2 < 3.00. Therefore, it is advantageous to have a suitable aperture size and a suitable lens thickness ratio, which ensures sufficient space for the reflection of the incident light and also a sufficient amount of incident light. In addition, the following condition can also be satisfied: 1.75 < YT1o / DM2R2 < 2.50. Reference is made to Fig. 25 and Fig. 26, which respectively show schematic views of DM2R2 and YT1o according to the first embodiment of the present disclosure.

[0032] When a minimum effective radius of the first refractive surface is YT1i and a maximum image height of the photographic optical lens assembly (which may be half of a diagonal length of an effective light-sensitive area of ​​the image sensor) is ImgH, the following condition can be satisfied: 0.90 < YT1i / ImgH < 2.00. Therefore, it is favorable to balance the ratio between the first refractive surface and the image surface in order to obtain a relatively large area of ​​the incident light quantity and thereby maintain sufficient image illuminance. In addition, the following condition can also be satisfied: 1.00 < YT1i / ImgH < 1.50. Reference is made to Fig. 26, which shows a schematic view of YT1i according to the first embodiment of the present disclosure.

[0033] When the minimum effective radius of the first refractive surface is YT1i and the maximum effective radius of the second refractive surface is YT2, the following condition can be satisfied: 1.20 < YT1i / YT2 < 3.50. Therefore, it is advantageous to balance the effective radius ratio between the first refractive surface and the second refractive surface, thereby preventing stray light while maintaining sufficient image brightness. Furthermore, the following condition can also be satisfied: 1.50 < YT1i / YT2 < 3.00.

[0034] When the Abbe number of the second lens element is V2 and the Abbe number of the fourth lens element is V4, the following condition can be satisfied: 20.0 < V2+V4 < 70.0. Therefore, it is beneficial for effectively correcting the focus positions of light with different wavelengths to prevent overlapping images. Furthermore, the following condition can also be satisfied: 30.0 < V2+V4 < 65.0.

[0035] When the radius of curvature of the second reflecting surface along the central axis is RM2 and the radius of curvature of the image-side surface of the second lens element is R4, the following condition can be satisfied: -0.10 < (RM2+R4) / (RM2-R4) < 1.00. Therefore, it is beneficial to effectively balance the radii of curvature of the second reflecting surface and the image-side surface of the second lens element, thereby improving the convergence quality of the imaging light and thus effectively correcting the field of curvature and spherical aberration. In addition, the following condition can also be satisfied: 0.00 < (RM2+R4) / (RM2-R4) < 0.80. In addition, the following condition can also be satisfied: 0.10 < (RM2+R4) / (RM2-R4) < 0.50.

[0036] When the focal length of the photographic optical lens assembly is f, the focal length of the second lens element is f2, the focal length of the third lens element is f3, the focal length of the fourth lens element is f4, and the focal length of the fifth lens element is f5, the following condition can be satisfied: 0.60 < |f / f2| / (|f / f3|+|f / f4|+|f / f5|) < 10.00. Therefore, it is advantageous to adjust the refractive power of the second lens element to balance the convergence or divergence of light, thereby improving the convergence quality of light from all fields of view. In addition, the following condition can also be satisfied: 0.80 < |f / f2| / (|f / f3|+|f / f4|+|f / f5|) < 8.00.

[0037] When the axial distance between the third lens element and the fourth lens element is T34, and the axial distance between the fourth lens element and the fifth lens element is T45, the following condition can be satisfied: 0.05 < T45 / T34 < 2.50. Therefore, it is advantageous to control the ratio between the distance from the third lens element to the fourth lens element and the distance from the fourth lens element to the fifth lens element, thereby increasing space utilization and reducing manufacturing tolerance. In addition, the following condition can also be satisfied: 0.10 < T45 / T34 < 1.50. Furthermore, the following condition can also be satisfied: 0.20 < T45 / T34 < 1.00.

[0038] If the focal length of the photographic optical lens assembly is f, the maximum effective radius of the first refractive surface is YT1o, and the minimum effective radius of the first refractive surface is YT1i, the following condition can be satisfied: 1.00<0.5×f / YT1o2−YT1i2<2.00. Therefore, it is beneficial to achieve a reasonable balance between illuminance and depth of field, and also to increase the amount of incident light to improve image quality. In addition, the following condition can also be met: 1.20<0.5×f / YT1o2−YT1i2<1.85.

[0039] When a displacement parallel to the central axis from an axial vertex on the object-side surface of the fourth lens element to a position of the maximum effective radius on the object-side surface of the fourth lens element is Sag4R1 and the central thickness of the fourth lens element is CT4, the following condition can be satisfied: -2.00 <Sag4R1 / CT4<-0,20. Daher ist es vorteilhaft, um periphere Aberrationen der fotografischen optischen Linsenbaugruppe zu korrigieren und die Linsendicke zu steuern. Darüber hinaus kann auch die folgende Bedingung erfüllt sein: -1,50 < Sag4R1 / CT4 < -0,30. Es wird Bezug genommen auf Fig.25, which shows a schematic view of Sag4R1 according to the first embodiment of the present disclosure. 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 photographic optical lens assembly, the value of the shift is positive; 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 photographic optical lens assembly, the value of the shift is negative.

[0040] When the minimum effective radius of the first refractive surface is YT1i, the maximum effective radius of the second refractive surface is YT2, and the axial distance between the second reflecting surface and the second refractive surface is DM2R2, the following condition can be satisfied: 0.20 < (YT1i-YT2) / DM2R2 < 1.00. Therefore, it is beneficial to effectively prevent light with a relatively large incident angle from being emitted directly onto the image surface to avoid ghosting. In addition, the following condition can also be satisfied: 0.38 < (YT1i-YT2) / DM2R2 < 0.80.

[0041] When a maximum effective radius of the second reflective surface is YM2 and the maximum effective radius of the second refractive surface is YT2, the following condition can be satisfied: 1.20 < YM2 / YT2 < 2.50. Therefore, it is advantageous to balance the ratio of the effective radii between the second reflective surface and the second refractive surface, thereby maintaining the aperture size for entering the second lens element and preventing stray light generated at the periphery. In addition, the following condition can also be satisfied: 1.45 < YM2 / YT2 < 2.20. Reference is made to Fig. 26, which shows a schematic view of YM2 and YT2 according to the first embodiment of the present disclosure.

[0042] When the Abbe number of the third lens element is V3, the following condition can be satisfied: 10.0 < V3 < 21.0. Therefore, an appropriate material selection of the third lens element is beneficial for correcting chromatic aberration. Furthermore, the following condition can also be satisfied: 15.0 < V3 < 20.0.

[0043] According to the present disclosure, the above-mentioned features and conditions can be used in numerous combinations to achieve corresponding effects.

[0044] According to the present disclosure, the lens elements of the photographic optical lens assembly can be made of either glass or plastic material. When the lens elements are made of glass material, the refractive power distribution of the photographic optical lens assembly can be more flexible, and the influence on imaging caused by temperature changes in the external environment can be reduced. The glass lens element can be manufactured by either grinding or molding. When the lens elements are made of plastic material, manufacturing costs can be effectively reduced. In addition, the surfaces of each lens element can be designed to be spherical or aspherical. Spherical lens elements are easy to manufacture.The design of aspherical lens elements allows for more control variables to eliminate aberrations and reduce the required number of lens elements, effectively shortening the overall track length of the photographic optical lens assembly. Additionally, the aspherical surfaces can be manufactured using plastic injection molding or glass molding.

[0045] According to the present disclosure, an aspheric lens surface means that the lens surface has an aspheric shape over its entire optically effective area or part(s) thereof.

[0046] According to the present disclosure, one or more of the lens element materials may optionally include an additive that creates light absorption and interference effects and modifies the transmittance of the lens elements in a specific wavelength range to reduce unwanted stray light or color variations. For example, the additive may optionally filter out light in the wavelength range of 600 nm to 800 nm to reduce excessive red light and / or near-infrared light; or it may optionally filter out light in the wavelength range of 350 nm to 450 nm to prevent excessive blue light and / or near-ultraviolet light from interfering with the final image. The additive may be homogeneously blended with a plastic material used in the manufacture of a blended-material lens element by injection molding.In addition, the additive can be applied to the lens surfaces to achieve the above-mentioned effects.

[0047] According to the present disclosure, each of an object-side surface and an image-side surface has a paraxial region and an off-axis region. The paraxial region refers to the region of the surface where light rays travel close to the central axis, and the off-axis region refers to the region of the surface far from the paraxial region. Specifically, unless otherwise specified, if the lens element has a convex surface, the surface of the lens element is convex in the paraxial region thereof; if the lens element has a concave surface, the surface is concave in the paraxial region thereof. Furthermore, if a range of refractive power or focus of a lens element is not defined, the range of refractive power or focus of a lens element is in the paraxial region thereof.

[0048] According to the present disclosure, an inflection point is a point on the surface of the lens element where the surface changes from concave to convex, or vice versa. A critical point is an off-axial point on the lens surface where its tangent is perpendicular to the central axis.

[0049] According to the present disclosure, the image surface of the photographic optical lens assembly may be flat or curved based on the corresponding image sensor, in particular a curved surface that is concave and faces the object side of the photographic optical lens assembly.

[0050] According to the present disclosure, an image correction unit, such as a field flattener, can optionally be arranged between the lens element closest to the image side of the photographic optical lens assembly along the optical path and the image surface to correct aberrations such as field curvature. The optical properties of the image correction unit, such as curvature, thickness, refractive index, position, and surface shape (convex or concave surface with spherical, aspherical, diffractive, or Fresnel types), can be adjusted according to the design of the image acquisition unit. In general, a preferred image correction unit is, for example, a thin transparent element having a concave object-side surface and a flat image-side surface, with the thin transparent element arranged near the image surface.

[0051] According to the present disclosure, the photographic optical lens assembly may include at least one diaphragm, such as an aperture stop, a diaphragm stop, or a field stop. The diaphragm stop or the field stop is adjusted to eliminate stray light and thereby improve image quality.

[0052] According to the present disclosure, an aperture stop can be configured as a front stop or a center stop. A front stop disposed between an imaged object and the first lens element can create a larger distance between an exit pupil of the photographic optical lens assembly and the image surface to produce a telecentric effect, thereby improving the image sensor efficiency of an image sensor (e.g., CCD or CMOS). A center stop disposed between the first lens element and the image surface is beneficial for increasing the viewing angle of the photographic optical lens assembly, thereby providing a wider field of view for the same.

[0053] According to the present disclosure, the photographic optical lens assembly may include an aperture control unit. The aperture control unit may be a mechanical component or a light modulator that can control the size and shape of the aperture through electricity or electrical signals. The mechanical component may include a movable element, such as a blade assembly or a light-shielding film. The light modulator may include a shielding element, such as a filter, an electrochromic material, or a liquid crystal layer. The aperture control unit controls the amount of incident light or the exposure time to enhance the ability to adjust image quality. Additionally, the aperture control unit may be the aperture stop of the present disclosure, which changes the f-number to achieve different imaging effects, such as depth of field or lens aperture.

[0054] According to the present disclosure, the photographic optical lens assembly may include one or more optical elements for defining the shape of light passing through the photographic optical lens assembly. Each optical element may be, but is not limited to, a filter, a polarizer, etc., and each optical element may be, but is not limited to, a single-piece element, a composite component, a thin film, etc. The optical element may be located on the object side or the image side of the photographic optical lens assembly, or between any two adjacent lens elements, to transmit light in a specific shape to meet application requirements.

[0055] According to the present disclosure, the photographic optical lens assembly may include at least one optical lens element, an optical element, or a substrate having at least one surface with an anti-reflection layer. The anti-reflection layer can effectively reduce stray light caused by light reflection at the interface. The anti-reflection layer may be disposed in an optically ineffective region of an object-side surface or an image-side surface of the optical lens element, or a connecting surface between the object-side surface and the image-side surface. The optical element may be a light-blocking element, an annular spacer, a housing element, a cover glass, a blue glass, a filter, a color filter, an optical path folding element, a prism, a mirror, etc.The carrier may be a base for supporting a lens assembly, a microlens disposed on an image sensor, a substrate surrounding the image sensor, a glass plate for protecting the image sensor, etc.

[0056] According to the present disclosure, the object side and the image side are defined in accordance with the direction of the central axis, and the axial optical data is calculated along the central axis.

[0057] In accordance with the above description of the present disclosure, the following specific embodiments are provided for further explanation. 1. Embodiment

[0058] Fig. 1 is a schematic view of an image acquisition unit according to the first embodiment of the present disclosure. Fig.Figure 2 shows, in order from left to right, spherical aberration curves, astigmatic field curves, and a distortion curve of the image acquisition unit according to the first embodiment. Fig. 1, the image capture unit 1 includes the photographic optical lens assembly (its reference numeral is omitted) of the present disclosure and an image sensor IS. The photographic optical lens assembly includes, in order from an object side to an image side along a central axis, a diaphragm S1, a first lens element E1, an aperture stop ST, a second lens element E2, a third lens element E3, a stop S2, a fourth lens element E4, a fifth lens element E5, a filter E6, and an image surface IMG. The photographic optical lens assembly includes five lens elements (E1, E2, E3, E4, and E5), with no additional lens element disposed between the adjacent five lens elements.

[0059] The first lens element E1 has a first refractive surface E1_1 facing the object side and located in an edge region of an object-side surface (its reference numeral is omitted) of the first lens element E1, a first reflective surface E1_2 facing the object side and located in an edge region of an image-side surface (its reference numeral is omitted) of the first lens element E1, a second reflective surface E1_3 facing the image side and located in a central region of the object-side surface of the first lens element E1, and a second refractive surface E1_4 facing the image side and located in a central region of the image-side surface of the first lens element E1. The second refractive surface E1_4 is convex in a paraxial region thereof.The first lens element E1 is made of plastic material and has the first refractive surface E1_1, the first reflective surface E1_2, the second reflective surface E1_3 and the second refractive surface E1_4, all of which are aspherical.

[0060] The second lens element E2 with negative refractive power has an object-side surface that is concave in a paraxial region thereof and an image-side surface that is concave in a paraxial region thereof. The second lens element E2 is made of plastic material and has the object-side surface and the image-side surface, both of which are aspherical. The object-side surface of the second lens element E2 has an inflection point. The image-side surface of the second lens element E2 has an inflection point. The object-side surface of the second lens element E2 has a convex critical point in an off-axis region thereof.

[0061] The third lens element E3 with positive refractive power has an object-side surface that is convex in a paraxial region thereof and an image-side surface that is concave in a paraxial region thereof. The third lens element E3 is made of plastic material and has the object-side surface and the image-side surface, both of which are aspherical. 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 concave critical point in an off-axis region thereof. The image-side surface of the third lens element E3 has a convex critical point and a concave critical point in an off-axis region thereof.

[0062] The fourth lens element E4 with positive refractive power has an object-side surface that is convex in a paraxial region thereof and an image-side surface that is concave in a paraxial region thereof. The fourth lens element E4 is made of plastic material and has the object-side surface and the image-side surface, both of which are aspherical. The object-side surface of the fourth lens element E4 has two inflection points. The image-side surface of the fourth lens element E4 has one inflection point. The object-side surface of the fourth lens element E4 has a concave critical point in an off-axis region thereof. The image-side surface of the fourth lens element E4 has a convex critical point in an off-axis region thereof.

[0063] The fifth lens element E5 with negative refractive power has an object-side surface that is concave in a paraxial region thereof and an image-side surface that is convex in a paraxial region thereof. The fifth lens element E5 is made of plastic material and has the object-side surface and the image-side surface, both aspherical. The object-side surface of the fifth lens element E5 has an inflection point. The image-side surface of the fifth lens element E5 has an inflection point. The object-side surface of the fifth lens element E5 has a convex critical point in an off-axis region thereof.

[0064] The E6 filter is made of glass and is located between the fifth lens element E5 and the image surface IMG. It does not affect the focal length of the photographic optical lens assembly. The IS image sensor is located on or near the image surface IMG of the photographic optical lens assembly.

[0065] The equation of the aspherical surface profiles of the above-mentioned lens elements of the first embodiment is expressed as follows: X(Y)=(Y2 / R) / (1+sqrt(1−(1+k)×(Y / R)2))+∑i(Ai)×(Yi) , where X is the displacement parallel to the central axis from an axial vertex on the aspherical surface to a point at a distance Y from the central axis on the aspherical surface; Y is the vertical distance between the point on the aspherical surface and the central axis; R is the radius of curvature; k is the conical coefficient; and Ai is the i-th aspherical coefficient, and in the embodiments, i may be 4, 6, 8, 10, 12, 14, 16, 18 and 20, but is not limited thereto.

[0066] In the photographic optical lens assembly of the image capture unit 1 according to the first embodiment, when a focal length of the photographic optical lens assembly is f, an aperture number of the photographic optical lens assembly is Fno, and half of a maximum field of view of the photographic optical lens assembly is HFOV, these parameters have the following values: f = 13.48 millimeters (mm), Fno = 1.66, and HFOV = 9.7 degrees. Note that, in the present disclosure, said Fno may refer to an equivalent aperture number calculated according to the following formula: 0.5×f / YT1o2−YT1i2

[0067] When an axial distance between the second reflecting surface E1_3 and the image surface IMG is DM2l and the focal length of the photographic optical lens assembly is f, the following condition is satisfied: DM2I / f = 0.51.

[0068] When the focal length of the photographic optical lens assembly is f, a focal length of the second lens element E2 is f2, a focal length of the third lens element E3 is f3, a focal length of the fourth lens element E4 is f4, and a focal length of the fifth lens element E5 is f5, the following condition is satisfied: |f / f2| / (|f / f3|+|f / f4|+|f / f5|)=4.38.

[0069] If the focal length of the second lens element E2 is f2 and the focal length of the fifth lens element E5 is f5, the following condition is satisfied: 10×|f2 / f5| = 0.58.

[0070] When a radius of curvature of the second reflecting surface E1_3 at the central axis is RM2 and a radius of curvature of the image-side surface of the second lens element E2 is R4, the following condition is satisfied: (RM2+R4) / (RM2-R4) = 0.28.

[0071] When a radius of curvature of the object-side surface of the second lens element E2 is R3 and the radius of curvature of the image-side surface of the second lens element E2 is R4, the following condition is satisfied: (R3+R4) / (R3-R4) = 0.58.

[0072] When the radius of curvature of the image-side surface of the second lens element E2 is R4 and a radius of curvature of the object-side surface of the fifth lens element E5 is R9, the following condition is satisfied: (R4+R9) / (R4-R9) = -0.66.

[0073] When a distance parallel to the central axis between an axial vertex on the second reflecting surface E1_3 and a position of the maximum effective radius on the first reflecting surface E1_2 is DM2M1i, and an axial distance between the second reflecting surface E1_3 and the image-side surface of the second lens element E2 is DM2R4, the following condition is satisfied: DM2M1i / DM2R4 = 0.77. In this embodiment, an axial distance between two adjacent lens elements is a distance in a paraxial region between two adjacent lens surfaces of the two adjacent lens elements.

[0074] When an axial distance between the second reflective surface E1_3 and the second refractive surface E1_4 is DM2R2, a central thickness of the second lens element E2 is CT2, a central thickness of the third lens element E3 is CT3, a central thickness of the fourth lens element E4 is CT4, and a central thickness of the fifth lens element E5 is CT5, the following condition is satisfied: DM2R2 / (CT2+CT3+CT4+CT5)=1.12.

[0075] When an axial distance between the first lens element E1 and the second lens element E2 is T12 and an axial distance between the third lens element E3 and the fourth lens element E4 is T34, the following condition is satisfied: T12 / T34 = 0.15.

[0076] When the axial distance between the third lens element E3 and the fourth lens element E4 is T34 and an axial distance between the fourth lens element E4 and the fifth lens element E5 is T45, the following condition is satisfied: T45 / T34 = 0.27.

[0077] If a refractive index of the second lens element E2 is N2, the following condition is satisfied: N2 = 1.639.

[0078] If an Abbe number of the second lens element E2 is V2 and an Abbe number of the fourth lens element E4 is V4, the following condition is satisfied: V2+V4 = 60.9.

[0079] If an Abbe number of the third lens element E3 is V3, the following condition is satisfied: V3 = 19.5.

[0080] When a displacement parallel to the central axis from an axial vertex on the object-side surface of the fourth lens element E4 to a position of the maximum effective radius on the object-side surface of the fourth lens element E4 is Sag4R1 and the central thickness of the fourth lens element E4 is CT4, the following condition is satisfied: Sag4R1 / CT4 = -0.42.

[0081] If a maximum effective radius of the first refractive surface E1_1 is YT1o, the following condition is satisfied: YT1o = 5.00 mm.

[0082] If a minimum effective radius of the first refractive surface E1_1 is YT1i, the following condition is satisfied: YT1i = 2.90 mm.

[0083] If a maximum effective radius of the first reflecting surface E1_2 is YM1o, the following condition is satisfied: YM1o = 4.85 mm. Reference is made to Fig.26, which shows a schematic view of YM1o according to the first embodiment of the present disclosure.

[0084] If a minimum effective radius of the first reflecting surface E1_2 is YM1i, the following condition is satisfied: YM1i = 2.70 mm. Reference is made to Fig. 26, which shows a schematic view of YM1i according to the first embodiment of the present disclosure.

[0085] If a maximum effective radius of the second reflecting surface E1_3 is YM2, the following condition is satisfied: YM2 = 2.30 mm.

[0086] If a maximum effective radius of the second refractive surface E1_4 is YT2, the following condition is satisfied: YT2 = 1.29 mm.

[0087] When the focal length of the photographic optical lens assembly is f, the maximum effective radius of the first refractive surface is E1_1 YT1o, and the minimum effective radius of the first refractive surface is E1_1 YT1i, the following condition is satisfied: = 1.66.

[0088] If the maximum effective radius of the first refractive surface E1_1 is YT1o and the axial distance between the second reflecting surface E1_3 and the second refractive surface E1_4 is DM2R2, the following condition is satisfied: YT1o / DM2R2 = 1.88.

[0089] When the minimum effective radius of the first refractive surface E1_1 is YT1i, the maximum effective radius of the second refractive surface E1_4 is YT2, and the axial distance between the second reflecting surface E1_3 and the second refractive surface E1_4 is DM2R2, the following condition is satisfied: (YT1i-YT2) / DM2R2 = 0.61.

[0090] When the minimum effective radius of the first refractive surface E1_1 is YT1i and a maximum image height of the photographic optical lens assembly is ImgH, the following condition is satisfied: YT1i / ImgH = 1.23.

[0091] If the minimum effective radius of the first refractive surface E1_1 is YT1i and the maximum effective radius of the second refractive surface E1_4 is YT2, the following condition is satisfied: YT1 i / YT2 = 2.25.

[0092] If the maximum effective radius of the second reflecting surface E1_3 is YM2 and the maximum effective radius of the second refractive surface E1_4 is YT2, the following condition is satisfied: YM2 / YT2 = 1.78.

[0093] The detailed optical data of the first embodiment are shown in Table 1A and the aspherical surface data in Table 1B below. TABLE 1A 1. Embodiment f = 13.48 mm, Fno = 1.66, HFOV = 9.7 degrees Surface # radius of curvature thickness material index Abbé # Refractive / Reflective focal length 0 object Even Infinite Refractive 1 aperture Even -0,512 Refractive 2 Lens 1 edge area 18,1592 (ASP) 3,198 plastic 1,534 56,0 Refractive - 3 -10,8808 (ASP) -2,659 plastic 1,534 56,0 Reflective - 4 Lens 1 Central Area -6,8456 (ASP) 2,659 plastic 1,534 56,0 Reflective - 5 -10,8808 (ASP) 0,077 Refractive 6 Ap. aperture Even -0,020 Refractive 7 Lens 2 -14,5998 (ASP) 0,320 plastic 1,639 23,5 Refractive -4,76 8 3,8672 (ASP) 0,338 Refractive 9 Lens 3 5,7133 (ASP) 0,796 plastic 1,669 19,5 Refractive 102,13 10 5,8864 (ASP) 0,131 Refractive 11 aperture Even 0,261 Refractive 12 Lens 4 11,2329 (ASP) 0,547 plastic 1,566 37,4 Refractive 38,61 13 22,7042 (ASP) 0,106 Refractive 14 Lens 5 -19,1327 (ASP) 0,710 plastic 1,544 56,0 Refractive -81,60 15 -34,0625 (ASP) 0,316 Refractive 16 filter Even 0,210 Glass 1,517 64,2 Refractive - 17 Even 0,393 Refractive 18 Picture Even - Refractive Note: The reference wavelength is 587.6 nm (d-line). An effective radius of the aperture S1 (surface 1) is 5,000 mm. An effective radius of the aperture S2 (surface 11) is 1,400 mm. TABLE 1B Aspherical coefficients Surface # 2 3 4 5 k = -5,739510E+00 -4,231530E-01 -3,515020E+00 -4,231530E-01 A4 = -1,640017E-04 4,478148E-05 2,145081E-05 4,478148E-05 A6 = -1,743296E-06 -2,193771E-07 3,291612E-06 -2,193771E-07 A8 = 1,151288E-07 1,272160E-07 -1,606579E-06 1,272160E-07 A10 = - -1,566711E-08 -4,008561 E-08 -1,566711E-08 A12 = - 1,499939E-09 - 1,499939E-09 A14 = - -8,999809E-11 - -8,999809E-11 A16 = - 3,265189E-12 - 3,265189E-12 A18 = - -6,537292E-14 - -6,537292E-14 A20 = - 5,539970E-16 - 5,539970E-16 Surface # 7 8 9 10 k = -4,359600E+01 3,837730E+00 1,467890E+01 7,688420E+00 A4 = 7,387749E-02 5,263510E-02 -5,839365E-02 -5,364493E-02 A6 = -4,205655E-02 1,618498E-03 4,625167E-02 3,088189E-02 A8 = 4,964857E-02 -1,620746E-01 -2,662708E-01 -7,913994E-02 A10 = -8,267615E-02 5,832587E-01 8,413150E-01 1,484795E-01 A12 = 1,264674E-01 -1,201303E+00 -1,664632E+00 -1,915425E-01 A14 = -1,319773E-01 1,527094E+00 2,032529E+00 1,596348E-01 A16 = 8,506390E-02 -1,177796E+00 -1,498088E+00 -8,162079E-02 A18 = -3,042922E-02 5,041813E-01 6,106219E-01 2,321389E-02 A20 = 4,617466E-03 -9,188219E-02 -1,058167E-01 -2,760684E-03 Surface # 12 13 14 15 k = 1,350940E+01 9,252880E+01 -8,500270E+01 7,300640E+01 A4 = -7,070287E-02 -1,488080E-01 -1,589637E-01 -7,005887E-02 A6 = 2,695266E-02 8,422174E-02 1,064219E-01 3,382302E-02 A8 = -6,476633E-02 -4,375346E-02 -6,119074E-02 -2,056531 E-02 A10 = 1,162590E-01 3,764548E-02 7,745970E-02 1,304671E-02 A12 = -1,549235E-01 -2,750829E-02 -7,076763E-02 -7,573650E-03 A14 = 1,278543E-01 9,998981E-03 3,471282E-02 3,088663E-03 A16 = -6,290082E-02 -1,570234E-03 -9,295194E-03 -7,769024E-04 A18 = 1,676199E-02 7,011308E-05 1,296845E-03 1,075735E-04 A20 = -1,817456E-03 - -7,416027E-05 -6,194237E-06

[0094] Table 1A shows the radius of curvature, thickness, and focal length in millimeters (mm). Surface numbers 0-18 represent the surfaces arranged sequentially from the object side to the image side along the central axis. In Table 1B, k represents the cone coefficient of the aspherical surface profile equation. A4-A20 represent the aspherical coefficients ranging from the 4th to the 20th order. The tables shown below for each embodiment are the corresponding schematic parameter and aberration curves, and the definitions of the tables are the same as in Table 1A and Table 1B of the first embodiment. Therefore, no further explanation is given in this regard. 2. Embodiment

[0095] Fig. 3 is a schematic view of an image acquisition unit according to the second embodiment of the present disclosure. Fig.Figure 4 shows, in order from left to right, spherical aberration curves, astigmatic field curves, and a distortion curve of the image acquisition unit according to the second embodiment. Fig. 3, the image capture unit 2 includes the photographic optical lens assembly (its reference numeral is omitted) of the present disclosure and an image sensor IS. The photographic optical lens assembly includes, in order from an object side to an image side along a central axis, a diaphragm S1, a first lens element E1, an aperture stop ST, a second lens element E2, a third lens element E3, a stop S2, a fourth lens element E4, a fifth lens element E5, a filter E6, and an image surface IMG. The photographic optical lens assembly includes five lens elements (E1, E2, E3, E4, and E5), and no additional lens element is arranged between the adjacent five lens elements.

[0096] The first lens element E1 has a first refractive surface E1_1 facing the object side and located in an edge region of an object-side surface (its reference numeral is omitted) of the first lens element E1, a first reflective surface E1_2 facing the object side and located in an edge region of an image-side surface (its reference numeral is omitted) of the first lens element E1, a second reflective surface E1_3 facing the image side and located in a central region of the object-side surface of the first lens element E1, and a second refractive surface E1_4 facing the image side and located in a central region of the image-side surface of the first lens element E1. The second refractive surface E1_4 is convex in a paraxial region thereof.The first lens element E1 is made of plastic material and has the first refractive surface E1_1, the first reflective surface E1_2, the second reflective surface E1_3 and the second refractive surface E1_4, all of which are aspherical.

[0097] The second lens element E2 with negative refractive power has an object-side surface that is concave in a paraxial region thereof and an image-side surface that is concave in a paraxial region thereof. The second lens element E2 is made of plastic material and has the object-side surface and the image-side surface, both of which are aspherical. The object-side surface of the second lens element E2 has an inflection point. The object-side surface of the second lens element E2 has a convex critical point in an off-axis region thereof.

[0098] The third lens element E3 with positive refractive power has an object-side surface that is concave in a paraxial region thereof and an image-side surface that is convex in a paraxial region thereof. The third lens element E3 is made of plastic and has both an object-side surface and an image-side surface that are aspherical. The image-side surface of the third lens element E3 has an inflection point.

[0099] The fourth lens element E4 with negative refractive power has an object-side surface that is concave in a paraxial region thereof and an image-side surface that is concave in a paraxial region thereof. The fourth lens element E4 is made of plastic material and has the object-side surface and the image-side surface, both of which are aspherical. The object-side surface of the fourth lens element E4 has an inflection point. The image-side surface of the fourth lens element E4 has an inflection point. The image-side surface of the fourth lens element E4 has a convex critical point in an off-axis region thereof.

[0100] The fifth lens element E5 with negative refractive power has an object-side surface that is convex in a paraxial region thereof and an image-side surface that is concave in a paraxial region thereof. The fifth lens element E5 is made of plastic material and has the object-side surface and the image-side surface, both of which are aspherical. The object-side surface of the fifth lens element E5 has four inflection points. The image-side surface of the fifth lens element E5 has two inflection points. The object-side surface of the fifth lens element E5 has a convex critical point and a concave critical point in an off-axis region thereof. The image-side surface of the fifth lens element E5 has a convex critical point in an off-axis region thereof.

[0101] The E6 filter is made of glass and is located between the fifth lens element E5 and the image surface IMG. It does not affect the focal length of the photographic optical lens assembly. The image sensor IS is located on or near the image surface IMG of the photographic optical lens assembly.

[0102] The detailed optical data of the second embodiment are shown in Table 2A and the aspherical surface data in Table 2B below. TABLE 2A 2. Embodiment f = 13.48 mm, Fno = 1.62, HFOV = 9.7 degrees Surface # radius of curvature thickness material index Abbé # Refractive / Reflective focal length 0 object Even Infinite Refractive 1 aperture Even -0,512 Refractive 2 Lens 1 edge area 18,3170 (ASP) 3,226 plastic 1,534 56,0 Refractive - 3 -10,7820 (ASP) -2,669 plastic 1,534 56,0 Reflective - 4 Lens 1 Central Area -6,6586 (ASP) 2,669 plastic 1,534 56,0 Reflective - 5 -10,7820 (ASP) 0,120 Refractive 6 Ap. aperture Even -0,030 Refractive 7 Lens 2 -19,1432 (ASP) 0,320 plastic 1,639 23,5 Refractive -5,82 8 4,6425 (ASP) 0,445 Refractive 9 Lens 3 -54,6394 (ASP) 0,637 plastic 1,669 19,5 Refractive 37,24 10 -17,1907 (ASP) -0,123 Refractive 11 aperture Even 0,302 Refractive 12 Lens 4 -92,2407 (ASP) 0,590 plastic 1,669 19,5 Refractive -17,70 13 13,6245 (ASP) 0,108 Refractive 14 Lens 5 21,2204 (ASP) 0,913 plastic 1,544 56,0 Refractive -1035,54 15 20,1401 (ASP) 0,316 Refractive 16 filter Even 0,210 Glass 1,517 64,2 Refractive - 17 Even 0,347 Refractive 18 Picture Even - Refractive Note: The reference wavelength is 587.6 nm (d-line). An effective radius of the aperture S1 (surface 1) is 5.080 mm. An effective radius of the aperture S2 (surface 11) is 1.388 mm. TABLE 2B Aspherical coefficients Surface # 2 3 4 5 k = -5,919540E+00 -4,311010E-01 -3,631060E+00 -4,311010E-01 A4 = -1,744132E-04 4,423970E-05 -1,817261E-05 4,423970E-05 A6 = -1,162321E-06 -7,951246E-07 2,923847E-05 -7,951246E-07 A8 = 1,081861E-07 2,889572E-07 -4,066202E-06 2,889572E-07 A10 = - -3,532158E-08 5,020300E-08 -3,532158E-08 A12 = - 2,932478E-09 - 2,932478E-09 A14 = - -1,542734E-10 - -1,542734E-10 A16 = - 4,981527E-12 - 4,981527E-12 A18 = - -8,999485E-14 - -8,999485E-14 A20 = - 6,960462E-16 - 6,960462E-16 Surface # 7 8 9 10 k = 5,256030E+01 4,278310E+00 -9,900000E+01 9,773840E+01 A4 = 7,172659E-02 6,816544E-02 -2,584337E-02 -3,303796E-02 A6 = -4,905401E-02 -5,871489E-02 -2,094437E-02 -9,969610E-03 A8 = 6,809796E-02 8,653535E-02 -4,506513E-03 -7,597106E-02 A10 = -1,071182E-01 -1,173374E-01 6,278993E-02 2,524346E-01 A12 = 1,437887E-01 6,217741E-02 -1,654804E-01 -4,063584E-01 A14 = -1,364189E-01 7,264059E-02 2,236766E-01 3,809528E-01 A16 = 8,320681E-02 -1,378011E-01 -1,716262E-01 -2,077536E-01 A18 = -2,891552E-02 8,235875E-02 7,060266E-02 6,100527E-02 A20 = 4,324376E-03 -1,755702E-02 -1,193064E-02 -7,380474E-03 Surface # 12 13 14 15 k = 1,224940E+01 5,148360E+01 2,569550E+01 3,132440E+01 A4 = -4,579563E-02 -1,324289E-01 -1,798486E-01 -7,566468E-02 A6 = -1,206768E-02 1,064683E-01 1,428503E-01 3,182916E-02 A8 = -1,869671E-02 -4,824660E-02 -5,722705E-02 -1,683195E-02 A10 = 8,031506E-02 9,930343E-03 2,219620E-02 8,429523E-03 A12 = -1,474377E-01 -7,917673E-04 -1,489004E-02 -3,770864E-03 A14 = 1,415124E-01 -4,262143E-05 7,544470E-03 1,241848E-03 A16 = -7,404856E-02 4,377235E-05 -2,059997E-03 -2,621262E-04 A18 = 1,995187E-02 -9,122930E-06 2,818985E-04 3,109095E-05 A20 = -2,138711E-03 - -1,535295E-05 -1,546415E-06

[0103] In the second embodiment, the equation for the aspherical surface profiles of the above-mentioned lens elements is the same as that of the first embodiment. The definitions of these parameters shown in Table 2C are also the same as those given in the first embodiment, with corresponding values ​​for the second embodiment, so no further explanation is given in this regard.

[0104] In addition, these parameters can be calculated from Table 2A and Table 2B as the following values ​​and satisfy the following conditions: TABLE 2C Schematic parameters f [mm] 13,48 V3 19,5 Fno 1,62 Sag4R1 / CT4 -0,46 HFOV [degree] 9,7 YT1o [mm] 5,08 DM2I / f 0,51 YT1i [mm] 2,90 |f / f2| / (|f / f3|+|f / f4|+|f / f5|) 2,04 YM1o [mm] 4,95 10×|f2 / f5| 0,06 YM1i [mm] 2,70 (RM2+R4) / (RM2-R4) 0,18 YM2 [mm] 2,37 (R3+R4) / (R3-R4) 0,61 YT2 [mm] 1,35 (R4+R9) / (R4-R9) -1,56 0,5×f / YT1o2−YT1i2 1,62 DM2M1i / DM2R4 0,76 YT1o / DM2R2 1,90 DM2R2 / (CT2+CT3+CT4+CT5) 1,08 (YT1i-YT2) / DM2R2 0,58 T12 / T34 0,50 YT1i / ImgH 1,23 T45 / T34 0,60 YT1i / YT2 2,14 N2 1,639 YM2 / YT2 1,75 V2+V4 43,0 - - 3. Embodiment

[0105] Fig. 5 is a schematic view of an image acquisition unit according to the third embodiment of the present disclosure. Fig.Figure 6 shows, in order from left to right, spherical aberration curves, astigmatic field curves, and a distortion curve of the image acquisition unit according to the third embodiment. Fig. 5, the image capture unit 3 includes the photographic optical lens assembly (its reference numeral is omitted) of the present disclosure and an image sensor IS. The photographic optical lens assembly includes, in order from an object side to an image side along a central axis, a diaphragm S1, a first lens element E1, an aperture stop ST, a second lens element E2, a third lens element E3, a stop S2, a fourth lens element E4, a fifth lens element E5, a filter E6, and an image surface IMG. The photographic optical lens assembly includes five lens elements (E1, E2, E3, E4, and E5), with no additional lens element disposed between each of the adjacent five lens elements.

[0106] The first lens element E1 has a first refractive surface E1_1 facing the object side and located in an edge region of an object-side surface (its reference numeral is omitted) of the first lens element E1, a first reflective surface E1_2 facing the object side and located in an edge region of an image-side surface (its reference numeral is omitted) of the first lens element E1, a second reflective surface E1_3 facing the image side and located in a central region of the object-side surface of the first lens element E1, and a second refractive surface E1_4 facing the image side and located in a central region of the image-side surface of the first lens element E1. The second refractive surface E1_4 is convex in a paraxial region thereof.The first lens element E1 is made of plastic material and has the first refractive surface E1_1, the first reflective surface E1_2, the second reflective surface E1_3 and the second refractive surface E1_4, all of which are aspherical.

[0107] The second lens element E2 with negative refractive power has an object-side surface that is convex in a paraxial region thereof and an image-side surface that is concave in a paraxial region thereof. The second lens element E2 is made of plastic material and has an object-side surface and an image-side surface, both of which are aspherical. The image-side surface of the second lens element E2 has an inflection point.

[0108] The third lens element E3 with negative refractive power has an object-side surface that is convex in a paraxial region thereof and an image-side surface that is concave in a paraxial region thereof. The third lens element E3 is made of plastic material and has the object-side surface and the image-side surface, both of which are aspherical. 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 concave critical point in an off-axis region thereof. The image-side surface of the third lens element E3 has a convex critical point in an off-axis region thereof.

[0109] The fourth lens element E4 with positive refractive power has an object-side surface that is convex in a paraxial region thereof and an image-side surface that is convex in a paraxial region thereof. The fourth lens element E4 is made of plastic material and has both the object-side surface and the image-side surface that are aspherical. The object-side surface of the fourth lens element E4 has two inflection points. The object-side surface of the fourth lens element E4 has a concave critical point in an off-axis region thereof.

[0110] The fifth lens element E5 with negative refractive power has an object-side surface that is concave in a paraxial region thereof and an image-side surface that is concave in a paraxial region thereof. The fifth lens element E5 is made of plastic material and has the object-side surface and the image-side surface, both of which are aspherical. The object-side surface of the fifth lens element E5 has one inflection point. The image-side surface of the fifth lens element E5 has two inflection points. The object-side surface of the fifth lens element E5 has a convex critical point in an off-axis region thereof. The image-side surface of the fifth lens element E5 has a convex critical point in an off-axis region thereof.

[0111] The E6 filter is made of glass and is located between the fifth lens element E5 and the image surface IMG. It does not affect the focal length of the photographic optical lens assembly. The IS image sensor is located on or near the image surface IMG of the photographic optical lens assembly.

[0112] The detailed optical data of the third embodiment are shown in Table 3A and the aspherical surface data in Table 3B below. TABLE 3A 3. Embodiment f = 13.64 mm, Fno = 1.68, HFOV = 9.7 degrees Surface # radius of curvature thickness material index Abbé # Refractive / Reflective focal length 0 object Even Infinite Refractive 1 aperture Even -0,512 Refractive 2 Lens 1 edge area 18,4145 (ASP) 3,238 plastic 1,534 56,0 Refractive - 3 -10,8510 (ASP) -2,698 plastic 1,534 56,0 Reflective - 4 Lens 1 Central Area -6,6229 (ASP) 2,698 plastic 1,534 56,0 Reflective - 5 -10,8510 (ASP) 0,086 Refractive 6 Ap. aperture Even -0,051 Refractive 7 Lens 2 83,3333 (ASP) 0,320 plastic 1,642 22,5 Refractive -5,20 8 3,2033 (ASP) 0,374 Refractive 9 Lens 3 7,9591 (ASP) 0,782 plastic 1,669 19,5 Refractive -68,73 10 6,5175 (ASP) 0,085 Refractive 11 aperture Even 0,278 Refractive 12 Lens 4 14,0182 (ASP) 0,628 plastic 1,587 28,3 Refractive 18,32 13 -45,4545 (ASP) 0,103 Refractive 14 Lens 5 -27,8136 (ASP) 0,660 plastic 1,545 56,1 Refractive -22,31 15 21,7756 (ASP) 0,316 Refractive 16 filter Even 0,210 Glass 1,517 64,2 Refractive - 17 Even 0,350 Refractive 18 Picture Even - Refractive Note: The reference wavelength is 587.6 nm (d-line). An effective radius of the aperture S1 (surface 1) is 5,000 mm. An effective radius of the aperture S2 (surface 11) is 1.405 mm. TABLE 3B Aspherical coefficients Surface # 2 3 4 5 k = -5,143770E+00 -4,492620E-01 -3,524690E+00 -4,492620E-01 A4 = -1,775797E-04 3,865561E-05 -1,479601E-04 3,865561 E-05 A6 = -4,520292E-07 4,159834E-07 6,011788E-05 4,159834E-07 A8 = 1,086302E-07 8,159370E-08 -5,900469E-06 8,159370E-08 A10 = - -8,760070E-09 1,239350E-07 -8,760070E-09 A12 = - 8,318914E-10 - 8,318914E-10 A14 = - -5,017207E-11 - -5,017207E-11 A16 = - 1,842150E-12 - 1,842150E-12 A18 = - -3,738468E-14 - -3,738468E-14 A20 = - 3,207507E-16 - 3,207507E-16 Surface # 7 8 9 10 k = -9,900000E+01 1,671140E+00 2,437800E+01 3,297890E+00 A4 = 5,985343E-02 4,924255E-02 -5,260625E-02 -5,659838E-02 A6 = -2,906548E-02 -2,147936E-02 3,185498E-02 1,799341E-02 A8 = 2,544770E-02 -1,190065E-02 -1,734781E-01 -3,692830E-02 A10 = -3,595821E-02 1,054132E-01 5,261678E-01 5,451900E-02 A12 = 6,048449E-02 -3,021720E-01 -1,023925E+00 -5,491687E-02 A14 = -7,316696E-02 4,941583E-01 1,246275E+00 3,441309E-02 A16 = 5,469632E-02 -4,691666E-01 -9,259491E-01 -1,165117E-02 A18 = -2,251126E-02 2,385237E-01 3,837713E-01 1,438341E-03 A20 = 3,896649E-03 -5,033319E-02 -6,827251E-02 1,118980E-04 Surface # 12 13 14 15 k = 8,306510E+01 -9,900000E+01 -5,325770E+01 7,741210E+01 A4 = -5,506179E-02 -1,339374E-01 -1,806900E-01 -8,589305E-02 A6 = -6,946330E-03 1,553520E-01 2,035384E-01 5,285294E-02 A8 = 4,441675E-02 -1,735890E-01 -1,973266E-01 -4,354390E-02 A10 = -1,600032E-01 1,304404E-01 1,470581E-01 2,987100E-02 A12 = 2,513021E-01 -6,182247E-02 -7,256226E-02 -1,505477E-02 A14 = -2,264953E-01 1,786914E-02 2,276356E-02 5,097039E-03 A16 = 1,193172E-01 -2,876818E-03 -4,371547E-03 -1,085919E-03 A18 = -3,413077E-02 1,962193E-04 4,692846E-04 1,309903E-04 A20 = 4,098137E-03 - -2,159723E-05 -6,751953E-06

[0113] In the third embodiment, the equation for the aspherical surface profiles of the above-mentioned lens elements is the same as that of the first embodiment. The definitions of these parameters, listed in Table 3C, are also the same as those given in the first embodiment, with corresponding values ​​for the third embodiment, so no further explanation is given in this regard.

[0114] In addition, these parameters can be calculated from Table 3A and Table 3B as the following values ​​and satisfy the following conditions: TABLE 3C Schematic parameters f [mm] 13,64 V3 19,5 Fno 1,68 Sag4R1 / CT4 -0,38 HFOV [degree] 9,7 YT1o [mm] 5,00 DM2I / f 0,50 YT1i [mm] 2,90 |f / f2| / (|f / f3|+|f / f4|+|f / f5|) 1,69 YM1o [mm] 4,85 10×|f2 / f5| 2,33 YM1i [mm] 2,70 (RM2+R4) / (RM2-R4) 0,35 YM2 [mm] 2,27 (R3+R4) / (R3-R4) 1,08 YT2 [mm] 1,26 (R4+R9) / (R4-R9) -0,79 0,5×f / YT1o2−YT1i2 1,68 DM2M1i / DM2R4 0,77 YT1o / DM2R2 1,85 DM2R2 / (CT2+CT3+CT4+CT5) 1,13 (YT1i-YT2) / DM2R2 0,61 T12 / T34 0,10 YT1i / ImgH 1,23 T45 / T34 0,28 YT1i / YT2 2,31 N2 1,642 YM2 / YT2 1,81 V2+V4 50,8 - - 4. Embodiment

[0115] Fig. 7 is a schematic view of an image acquisition unit according to the 4th embodiment of the present disclosure. Fig.Figure 8 shows, in order from left to right, spherical aberration curves, astigmatic field curves, and a distortion curve of the image acquisition unit according to the fourth embodiment. Fig. 7, the image capture unit 4 includes the photographic optical lens assembly (its reference numeral is omitted) of the present disclosure and an image sensor IS. The photographic optical lens assembly includes, in order from an object side to an image side along a central axis, a diaphragm S1, a first lens element E1, an aperture stop ST, a second lens element E2, a third lens element E3, a fourth lens element E4, a stop S2, a fifth lens element E5, a filter E6, and an image surface IMG. The photographic optical lens assembly includes five lens elements (E1, E2, E3, E4, and E5), and no additional lens element is arranged between the adjacent five lens elements.

[0116] The first lens element E1 has a first refractive surface E1_1 facing the object side and located in an edge region of an object-side surface (its reference numeral is omitted) of the first lens element E1, a first reflective surface E1_2 facing the object side and located in an edge region of an image-side surface (its reference numeral is omitted) of the first lens element E1, a second reflective surface E1_3 facing the image side and located in a central region of the object-side surface of the first lens element E1, and a second refractive surface E1_4 facing the image side and located in a central region of the image-side surface of the first lens element E1. The second refractive surface E1_4 is convex in a paraxial region thereof.The first lens element E1 is made of plastic material and has the first refractive surface E1_1, the first reflective surface E1_2, the second reflective surface E1_3 and the second refractive surface E1_4, all of which are aspherical.

[0117] The second lens element E2 with negative refractive power has an object-side surface that is concave in a paraxial region thereof and an image-side surface that is concave in a paraxial region thereof. The second lens element E2 is made of plastic material and has the object-side surface and the image-side surface, both of which are aspherical. The object-side surface of the second lens element E2 has an inflection point. The object-side surface of the second lens element E2 has a convex critical point in an off-axis region thereof.

[0118] The third lens element E3 with positive refractive power has an object-side surface that is convex in a paraxial region thereof and an image-side surface that is concave in a paraxial region thereof. The third lens element E3 is made of plastic material and has the object-side surface and the image-side surface, both of which are aspherical. 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 concave critical point in an off-axis region thereof. The image-side surface of the third lens element E3 has a convex critical point and a concave critical point in an off-axis region thereof.

[0119] The fourth lens element E4 with negative refractive power has an object-side surface that is convex in a paraxial region thereof and an image-side surface that is concave in a paraxial region thereof. The fourth lens element E4 is made of plastic material and has the object-side surface and the image-side surface, both of which are aspherical. The object-side surface of the fourth lens element E4 has two inflection points. The image-side surface of the fourth lens element E4 has two inflection points. The object-side surface of the fourth lens element E4 has a concave critical point in an off-axis region thereof. The image-side surface of the fourth lens element E4 has a convex critical point in an off-axis region thereof.

[0120] The fifth lens element E5 with negative refractive power has an object-side surface that is convex in a paraxial region thereof and an image-side surface that is concave in a paraxial region thereof. The fifth lens element E5 is made of plastic material and has the object-side surface and the image-side surface, both of which are aspherical. The object-side surface of the fifth lens element E5 has two inflection points. The image-side surface of the fifth lens element E5 has two inflection points. The object-side surface of the fifth lens element E5 has a concave critical point in an off-axis region thereof. The image-side surface of the fifth lens element E5 has a convex critical point in an off-axis region thereof.

[0121] The E6 filter is made of glass and is located between the fifth lens element E5 and the image surface IMG. It does not affect the focal length of the photographic optical lens assembly. The IS image sensor is located on or near the image surface IMG of the photographic optical lens assembly.

[0122] The detailed optical data of the 4th embodiment are shown in Table 4A and the aspherical surface data in Table 4B below. TABLE 4A 4. Embodiment f = 14.11 mm, Fno = 1.75, HFOV = 9.5 degrees Surface # radius of curvature thickness material index Abbé # Refractive / Reflective focal length 0 object Even Infinite Refractive 1 aperture Even -0,512 Refractive 2 Lens 1 edge area 17,5526 (ASP) 3,228 plastic 1,545 56,1 Refractive - 3 -10,8451 (ASP) -2,670 plastic 1,545 56,1 Reflective - 4 Lens 1 -6,5695 (ASP) 2,670 plastic 1,545 56,1 Reflective - Central area 5 -10,8451 (ASP) 0,043 Refractive 6 Ap. aperture Even -0,013 Refractive 7 Lens 2 -10,5600 (ASP) 0,320 plastic 1,639 23,5 Refractive -5,18 8 4,8754 (ASP) 0,428 Refractive 9 Lens 3 7,1446 (ASP) 0,515 plastic 1,669 19,5 Refractive 30,55 10 10,6676 (ASP) 0,565 Refractive 11 Lens 4 43,9095 (ASP) 0,405 plastic 1,669 19,5 Refractive -27,80 12 13,0160 (ASP) -0,161 Refractive 13 aperture Even 0,380 Refractive 14 Lens 5 121,0817 (ASP) 0,725 plastic 1,544 56,0 Refractive -82,30 15 32,6176 (ASP) 0,316 Refractive 16 filter Even 0,210 Glass 1,517 64,2 Refractive - 17 Even 0,402 Refractive 18 Picture Even - Refractive Note: The reference wavelength is 587.6 nm (d-line). An effective radius of the aperture S1 (surface 1) is 5,000 mm. An effective radius of the aperture S2 (surface 13) is 2,000 mm. TABLE 4B Aspherical coefficients Surface # 2 3 4 5 k = -6,512280E+00 -3,974470E-01 -3,515590E+00 -3,974470E-01 A4 = -1,639859E-04 4,466147E-05 3,338241 E-05 4,466147E-05 A6 = -1,718265E-06 -4,971626E-07 6,673205E-06 -4,971626E-07 A8 = 8,546440E-08 1,852469E-07 -3,678048E-06 1,852469E-07 A10 = - -2,144024E-08 6,767993E-08 -2,144024E-08 A12 = - 1,696792E-09 - 1,696792E-09 A14 = - -8,594572E-11 - -8,594572E-11 A16 = - 2,694704E-12 - 2,694704E-12 A18 = - -4,756527E-14 - -4,756527E-14 A20 = - 3,611704E-16 - 3,611704E-16 Surface # 7 8 9 10 k = -1,294560E+01 5,303660E+00 1,268210E+01 -2,438910E+01 A4 = 6,960877E-02 5,442214E-02 -5,905826E-02 -5,993501 E-02 A6 = -3,489436E-02 -2,039238E-02 -1,084521E-02 3,657597E-02 A8 = 3,604266E-02 -5,197797E-03 4,975861 E-02 -9,759895E-02 A10 = -5,174544E-02 4,309693E-02 -1,482230E-01 1,707174E-01 A12 = 6,845983E-02 -8,333347E-02 2,148088E-01 -2,070017E-01 A14 = -6,156304E-02 9,391148E-02 -1,788038E-01 1,634032E-01 A16 = 3,422669E-02 -6,337868E-02 8,257455E-02 -7,936701E-02 A18 = -1,058922E-02 2,352544E-02 -1,866416E-02 2,148875E-02 A20 = 1,395728E-03 -3,657727E-03 1,500198E-03 -2,432428E-03 Surface # 11 12 14 15 k = -9,900000E+01 5,008440E+01 9,900000E+01 8,956870E+01 A4 = -1,109341E-01 -1,911158E-01 -1,869880E-01 -9,538672E-02 A6 = 6,128721E-02 1,756956E-01 1,594796E-01 5,591659E-02 A8 = -3,362660E-02 -1,275801E-01 -6,543365E-02 -2,726111E-02 A10 = -2,506939E-02 5,674969E-02 2,461685E-03 7,963502E-03 A12 = 4,036748E-02 -1,676836E-02 9,866593E-03 -8,983737E-04 A14 = -2,204710E-02 3,256118E-03 -4,539213E-03 -2,440920E-04 A16 = 4,622897E-03 -3,534711E-04 9,513970E-04 1,131630E-04 A18 = 1,962928E-04 1,328882E-05 -9,988704E-05 -1,752866E-05 A20 = -1,300619E-04 - 4,255446E-06 1,012974E-06

[0123] In Embodiment 4, the equation for the aspherical surface profiles of the above-mentioned lens elements is the same as that of Embodiment 1. The definitions of these parameters, listed in Table 4C, are also the same as those given in Embodiment 1, with corresponding values ​​for Embodiment 4, so no further explanation is given in this regard.

[0124] In addition, these parameters can be calculated from Table 4A and Table 4B as the following values ​​and satisfy the following conditions: TABLE 4C Schematic parameters f [mm] 14,11 V3 19,5 Fno 1,75 Sag4R1 / CT4 -1,17 HFOV [degree] 9,5 YT1o [mm] 5,00 DM2I / f 0,48 YT1i [mm] 2,95 |f / f2| / (|f / f3|+|f / f4|+|f / f5|) 2,39 YM1o [mm] 4,87 10×|f2 / f5| 0,63 YM1i [mm] 2,70 (RM2+R4) / (RM2-R4) 0,15 YM2 [mm] 2,30 (R3+R4) / (R3-R4) 0,37 YT2 [mm] 1,34 (R4+R9) / (R4-R9) -1,08 0,5×f / YT1o2−YT1i2 1,75 DM2M1i / DM2R4 0,77 YT1o / DM2R2 1,87 DM2R2 / (CT2+CT3+CT4+CT5) 1,36 (YT1i-YT2) / DM2R2 0,60 T12 / T34 0,05 YT1i / ImgH 1,23 T45 / T34 0,39 YT1i / YT2 2,21 N2 1,639 YM2 / YT2 1,72 V2+V4 43,0 - - 5. Embodiment

[0125] Fig. 9 is a schematic view of an image acquisition unit according to the 5th embodiment of the present disclosure. Fig. Figure 10 shows, in order from left to right, spherical aberration curves, astigmatic field curves, and a distortion curve of the image acquisition unit according to the fifth embodiment. Fig.9, the image capture unit 5 includes the photographic optical lens assembly (its reference numeral is omitted) of the present disclosure and an image sensor IS. The photographic optical lens assembly includes, in order from an object side to an image side along a central axis, a diaphragm S1, a first lens element E1, an aperture stop ST, a second lens element E2, a third lens element E3, a stop S2, a fourth lens element E4, a fifth lens element E5, a filter E6, and an image surface IMG. The photographic optical lens assembly includes five lens elements (E1, E2, E3, E4, and E5), with no additional lens element disposed between each of the adjacent five lens elements.

[0126] The first lens element E1 has a first refractive surface E1_1 facing the object side and located in an edge region of an object-side surface (its reference numeral is omitted) of the first lens element E1, a first reflective surface E1_2 facing the object side and located in an edge region of an image-side surface (its reference numeral is omitted) of the first lens element E1, a second reflective surface E1_3 facing the image side and located in a central region of the object-side surface of the first lens element E1, and a second refractive surface E1_4 facing the image side and located in a central region of the image-side surface of the first lens element E1. The second refractive surface E1_4 is convex in a paraxial region thereof.The first lens element E1 is made of glass material and has the first refractive surface E1_1, the first reflection surface E1_2, the second reflection surface E1_3 and the second refractive surface E1_4, all of which are aspherical.

[0127] The second lens element E2 with negative refractive power has an object-side surface that is concave in a paraxial region thereof and an image-side surface that is concave in a paraxial region thereof. The second lens element E2 is made of plastic material and has the object-side surface and the image-side surface, both of which are aspherical. The object-side surface of the second lens element E2 has an inflection point. The image-side surface of the second lens element E2 has an inflection point. The object-side surface of the second lens element E2 has a convex critical point in an off-axis region thereof.

[0128] The third lens element E3 with positive refractive power has an object-side surface that is convex in a paraxial region thereof and an image-side surface that is concave in a paraxial region thereof. The third lens element E3 is made of plastic material and has the object-side surface and the image-side surface, both of which are aspherical. 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 concave critical point in an off-axis region thereof. The image-side surface of the third lens element E3 has a convex critical point and a concave critical point in an off-axis region thereof.

[0129] The fourth lens element E4 with negative refractive power has an object-side surface that is convex in a paraxial region thereof and an image-side surface that is concave in a paraxial region thereof. The fourth lens element E4 is made of plastic material and has the object-side surface and the image-side surface, both of which are aspherical. The object-side surface of the fourth lens element E4 has two inflection points. The image-side surface of the fourth lens element E4 has one inflection point. The object-side surface of the fourth lens element E4 has a concave critical point in an off-axis region thereof. The image-side surface of the fourth lens element E4 has a convex critical point in an off-axis region thereof.

[0130] The fifth lens element E5 with negative refractive power has an object-side surface that is convex in a paraxial region thereof and an image-side surface that is concave in a paraxial region thereof. The fifth lens element E5 is made of plastic material and has the object-side surface and the image-side surface, both of which are aspherical. The object-side surface of the fifth lens element E5 has two inflection points. The image-side surface of the fifth lens element E5 has two inflection points. The object-side surface of the fifth lens element E5 has a convex critical point and a concave critical point in an off-axis region thereof. The image-side surface of the fifth lens element E5 has a convex critical point in an off-axis region thereof.

[0131] The E6 filter is made of glass and is located between the fifth lens element E5 and the image surface IMG. It does not affect the focal length of the photographic optical lens assembly. The IS image sensor is located on or near the image surface IMG of the photographic optical lens assembly.

[0132] The detailed optical data of the 5th embodiment are shown in Table 5A and the aspherical surface data in Table 5B below. TABLE 5A 5. Embodiment f = 13.52 mm, Fno = 1.45, HFOV = 10.3 degrees Surface # radius of curvature thickness material index Abbé # Refractive / Reflective focal length 0 object Even Infinite Refractive 1 aperture Even -0,512 Refractive 2 Lens 1 edge area 19,1421 (ASP) 3,319 Glass 1,583 59,5 Refractive - 3 -10,6876 (ASP) -2,659 Glass 1,583 59,5 Reflective - 4 Lens 1 Central Area -6,3844 (ASP) 2,659 Glass 1,583 59,5 Reflective - 5 -10,6876 (ASP) 0,091 Refractive 6 Ap. aperture Even -0,038 Refractive 7 Lens 2 -10,2812 (ASP) 0,320 plastic 1,614 25,6 Refractive -5,23 8 4,7237 (ASP) 0,434 Refractive 9 Lens 3 5,6404 (ASP) 0,612 plastic 1,669 19,5 Refractive 99,50 10 5,8945 (ASP) 0,089 Refractive 11 aperture Even 0,347 Refractive 12 Lens 4 14,3361 (ASP) 0,419 plastic 1,614 25,6 Refractive -261,97 13 13,0160 (ASP) 0,200 Refractive 14 Lens 5 108,8113 (ASP) 0,749 plastic 1,544 56,0 Refractive -48,70 15 21,2554 (ASP) 0,316 Refractive 16 filter Even 0,210 Glass 1,517 64,2 Refractive - 17 Even 0,314 Refractive 18 Picture Even - Refractive Note: The reference wavelength is 587.6 nm (d-line). An effective radius of the aperture S1 (surface 1) is 5.450 mm. An effective radius of the aperture S2 (surface 11) is 1.444 mm. TABLE 5B Aspherical coefficients Surface # 2 3 4 5 k = -8,113400E+00 -4,000310E-01 -3,639810E+00 -4,000310E-01 A4 = -1,703539E-04 4,546928E-05 -3,950747E-05 4,546928E-05 A6 = -2,671838E-06 -1,125719E-06 3,064719E-05 -1,125719E-06 A8 = 1,110878E-07 2,626565E-07 -3,672173E-06 2,626565E-07 A10 = - -2,727303E-08 6,411157E-08 -2,727303E-08 A12 = - 1,979709E-09 - 1,979709E-09 A14 = - -9,164946E-11 - -9,164946E-11 A16 = - 2,611193E-12 - 2,611193E-12 A18 = - -4,160428E-14 - -4,160428E-14 A20 = - 2,833257E-16 - 2,833257E-16 Surface # 7 8 9 10 k = 6,051700E+00 4,190540E+00 1,458120E+01 1,331560E+00 A4 = 7,128775E-02 6,197846E-02 -5,778105E-02 -5,173339E-02 A6 = -3,239187E-02 -3,251275E-02 3,532556E-02 2,624473E-02 A8 = 4,117709E-03 -3,236866E-03 -1,568592E-01 -6,685029E-02 A10 = 2,461209E-02 7,368239E-02 3,385936E-01 9,954439E-02 A12 = -3,461413E-02 -1,515085E-01 -4,681774E-01 -1,042188E-01 A14 = 2,417594E-02 1,625066E-01 4,048017E-01 7,256800E-02 A16 = -9,548775E-03 -9,858392E-02 -2,135206E-01 -3,149763E-02 A18 = 2,022933E-03 3,175887E-02 6,278193E-02 7,699847E-03 A20 = -1,780694E-04 -4,216086E-03 -7,878538E-03 -7,757240E-04 Surface # 12 13 14 15 k = 8,487650E+01 4,951530E+01 9,900000E+01 5,972240E+01 A4 = -8,519003E-02 -1,650258E-01 -1,736866E-01 -9,736544E-02 A6 = 2,939540E-02 1,419891E-01 1,278376E-01 5,904029E-02 A8 = 1,752794E-02 -1,007468E-01 -4,950494E-02 -4,340651E-02 A10 = -1,036135E-01 5,829514E-02 1,876821E-02 2,917970E-02 A12 = 1,324695E-01 -2,775570E-02 -1,007002E-02 -1,495244E-02 A14 = -9,317706E-02 8,603050E-03 4,093547E-03 5,122771E-03 A16 = 3,701410E-02 -1,375145E-03 -9,330450E-04 -1,085223E-03 A18 = -7,475376E-03 7,959896E-05 1,085344E-04 1,274409E-04 A20 = 5,828771E-04 - -5,067622E-06 -6,281903E-06

[0133] In Embodiment 5, the equation for the aspherical surface profiles of the above-mentioned lens elements is the same as that of Embodiment 1. The definitions of these parameters, listed in Table 5C, are also the same as those in Embodiment 1, with corresponding values ​​for Embodiment 5, so no further explanation is given in this regard.

[0134] In addition, these parameters can be calculated from Table 5A and Table 5B as the following values ​​and satisfy the following conditions: TABLE 5C Schematic parameters f [mm] 13,52 V3 19,5 Fno 1,45 Sag4R1 / CT4 -0,71 HFOV [degree] 10,3 YT1o [mm] 5,45 DM2I / f 0,50 YT1i [mm] 2,80 |f / f2| / (|f / f3|+|f / f4|+|f / f5|) 5,56 YM1o [mm] 5,35 10×|f2 / f5| 1,07 YM1i [mm] 2,70 (RM2+R4) / (RM2-R4) 0,15 YM2 [mm] 2,63 (R3+R4) / (R3-R4) 0,37 YT2 [mm] 1,63 (R4+R9) / (R4-R9) -1,09 0,5×f / YT1o2−YT1i2 1,45 DM2M1i / DM2R4 0,76 YT1o / DM2R2 2,05 DM2R2 / (CT2+CT3+CT4+CT5) 1,27 (YT1i-YT2) / DM2R2 0,44 T12 / T34 0,12 YT1i / ImgH 1,17 T45 / T34 0,46 YT1i / YT2 1,72 N2 1,614 YM2 / YT2 1,62 V2+V4 51,2 - - 6. Embodiment

[0135] Fig. 11 is a schematic view of an image acquisition unit according to the 6th embodiment of the present disclosure. Fig. Figure 12 shows, in order from left to right, spherical aberration curves, astigmatic field curves, and a distortion curve of the image acquisition unit according to the 6th embodiment. Fig.11, the image capture unit 6 includes the photographic optical lens assembly (its reference numeral is omitted) of the present disclosure and an image sensor IS. The photographic optical lens assembly includes, in order from an object side to an image side along a central axis, a diaphragm S1, a first lens element E1, an aperture stop ST, a second lens element E2, a stop S2, a third lens element E3, a diaphragm S3, a fourth lens element E4, a fifth lens element E5, a filter E6, and an image surface IMG. The photographic optical lens assembly includes five lens elements (E1, E2, E3, E4, and E5), and no additional lens element is disposed between the adjacent five lens elements.

[0136] The first lens element E1 has a first refractive surface E1_1 facing the object side and located in an edge region of an object-side surface (its reference numeral is omitted) of the first lens element E1, a first reflective surface E1_2 facing the object side and located in an edge region of an image-side surface (its reference numeral is omitted) of the first lens element E1, a second reflective surface E1_3 facing the image side and located in a central region of the object-side surface of the first lens element E1, and a second refractive surface E1_4 facing the image side and located in a central region of the image-side surface of the first lens element E1. The second refractive surface E1_4 is convex in a paraxial region thereof.The first lens element E1 is made of plastic material and has the first refractive surface E1_1, the first reflective surface E1_2, the second reflective surface E1_3 and the second refractive surface E1_4, all of which are aspherical.

[0137] The second lens element E2 with negative refractive power has an object-side surface that is concave in a paraxial region thereof and an image-side surface that is concave in a paraxial region thereof. The second lens element E2 is made of plastic material and has the object-side surface and the image-side surface, both of which are aspherical. The object-side surface of the second lens element E2 has an inflection point. The object-side surface of the second lens element E2 has a convex critical point in an off-axis region thereof.

[0138] The third lens element E3 with positive refractive power has an object-side surface that is convex in a paraxial region thereof and an image-side surface that is concave in a paraxial region thereof. The third lens element E3 is made of plastic material and has both the object-side surface and the image-side surface, both of which are aspherical. 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 convex critical point and a concave critical point in an off-axis region thereof.

[0139] The fourth lens element E4 with positive refractive power has a convex object-side surface in a paraxial region thereof and a convex image-side surface in a paraxial region thereof. The fourth lens element E4 is made of plastic material and has the object-side surface and the image-side surface, both of which are aspherical. The object-side surface of the fourth lens element E4 has two inflection points. The image-side surface of the fourth lens element E4 has two inflection points. The object-side surface of the fourth lens element E4 has a concave critical point in an off-axis region.

[0140] The fifth lens element E5 with negative refractive power has a concave object-side surface in a paraxial region thereof and a concave image-side surface in a paraxial region thereof. The fifth lens element E5 is made of plastic material and has both aspherical object-side and image-side surfaces. The object-side surface of the fifth lens element E5 has one inflection point. The image-side surface of the fifth lens element E5 has two inflection points. The image-side surface of the fifth lens element E5 has a convex critical point in an off-axis region thereof.

[0141] The E6 filter is made of glass and is located between the fifth lens element E5 and the image surface IMG. It does not affect the focal length of the photographic optical lens assembly. The image sensor IS is located on or near the image surface IMG of the photographic optical lens assembly.

[0142] The detailed optical data of the 6th embodiment are shown in Table 6A and the aspherical surface data in Table 6B below. TABLE 6A 6. Embodiment f = 14.12 mm, Fno = 1.36, HFOV = 9.5 degrees Surface # radius of curvature thickness material index Abbé # Refractive / Reflective focal length 0 object Even Infinite Refractive 1 aperture Even -0,793 Refractive 2 Lens 1 edge area 18,3532 (ASP) 3,447 plastic 1,545 56,1 Refractive - 3 -10,3120 (ASP) -2,654 plastic 1,545 56,1 Reflective - 4 Lens 1 Central Area -5,7842 (ASP) 2,654 plastic 1,545 56,1 Reflective - 5 -10,3120 (ASP) 0,014 Refractive 6 Ap. aperture Even 0,016 Refractive 7 Lens 2 -8,8690 (ASP) 0,330 plastic 1,669 19,5 Refractive -4,00 8 3,8855 (ASP) 0,269 Refractive 9 aperture Even -0,063 Refractive 10 Lens 3 2,8360 (ASP) 0,389 plastic 1,669 19,5 Refractive 12,48 11 4,0583 (ASP) 0,255 Refractive 12 aperture Even 0,311 Refractive 13 Lens 4 32,1258 (ASP) 0,589 plastic 1,639 23,5 Refractive 14,55 14 -12,9782 (ASP) 0,399 Refractive 15 Lens 5 -10,7843 (ASP) 0,574 plastic 1,544 56,0 Refractive -8,29 16 7,8945 (ASP) 0,316 Refractive 17 filter Even 0,210 Glass 1,517 64,2 Refractive - 18 Even 0,373 Refractive 19 Picture Even - Refractive Note: The reference wavelength is 587.6 nm (d-line). An effective radius of the aperture S1 (surface 1) is 6,000 mm. An effective radius of the aperture S2 (surface 9) is 1,100 mm. An effective radius of the aperture S3 (surface 12) is 1,400 mm. TABLE 6B Aspherical coefficients Surface # 2 3 4 5 k = 2,056690E-01 -5,532690E-01 -4,922260E+00 -5,532690E-01 A4 = -2,095942E-04 7,580456E-05 -6,447821 E-04 7,580456E-05 A6 = 4,553592E-07 1,796760E-07 5,079896E-05 1,796760E-07 A8 = 3,904534E-08 1,152866E-08 -5,636284E-06 1,152866E-08 A10 = - -6,398998E-11 1,424592E-07 -6,398998E-11 Surface # 7 8 10 11 k = -6,688140E+01 3,598090E+00 -1,983320E+00 -1,252400E+00 A4 = 6,236019E-02 2,521825E-02 -9,193867E-02 -6,767432E-02 A6 = -2,509435E-02 2,380986E-02 6,308288E-02 8,565944E-04 A8 = 9,724269E-03 -2,827863E-02 -8,654931 E-02 2,186149E-02 A10 = -2,394242E-03 -6,922387E-03 8,894222E-02 -5,092758E-02 A12 = 3,485783E-04 3,914141E-02 -5,813794E-02 5,529207E-02 A14 = - -3,378168E-02 1,619402E-02 -3,122668E-02 A16 = - 9,771405E-03 - 7,717954E-03 Surface # 13 14 15 16 k = 9,900000E+01 1,991220E+01 7,506720E+00 1,238480E+00 A4 = -3,622441 E-02 -4,485027E-02 -1,134638E-01 -1,083007E-01 A6 = -3,181676E-02 -4,528481 E-03 4,462901 E-02 4,580045E-02 A8 = 5,589727E-02 4,288417E-02 7,279276E-03 -1,829342E-02 A10 = -8,812823E-02 -9,341189E-02 -3,006668E-02 3,828804E-03 A12 = 7,409508E-02 9,675995E-02 1,977235E-02 -2,312759E-04 A14 = -3,787648E-02 -5,885786E-02 -5,830566E-03 -3,121438E-05 A16 = 1,130913E-02 2,136208E-02 8,221887E-04 -1,546288E-06 A18 = -1,417788E-03 -4,205370E-03 -4,515655E-05 1,009793E-06 A20 = - 3,418516E-04 - -

[0143] In the sixth embodiment, the equation for the aspherical surface profiles of the above-mentioned lens elements is the same as that of the first embodiment. The definitions of these parameters, listed in Table 6C, are also the same as those in the first embodiment, with corresponding values ​​for the sixth embodiment, so no further explanation is given in this regard.

[0144] In addition, these parameters can be calculated from Table 6A and Table 6B as the following values ​​and satisfy the following conditions: TABLE 6C Schematic parameters f [mm] 14,12 V3 19,5 Fno 1,36 Sag4R1 / CT4 -0,42 HFOV [degree] 9,5 YT1o [mm] 6,00 DM2l / f 0,47 YT1i [mm] 3,00 |f / f2| / (|f / f3|+|f / f4|+|f / f5|) 0,93 YM1o [mm] 5,86 10x|f2 / f5| 4,83 YM1i [mm] 2,50 (RM2+R4) / (RM2-R4) 0,20 YM2 [mm] 2,65 (R3+R4) / (R3-R4) 0,39 YT2 [mm] 1,40 (R4+R9) / (R4-R9) -0,47 0,5×f / YT1o2−YT1i2 1,36 DM2M1i / DM2R4 0,78 YT1o / DM2R2 2,26 DM2R2 / (CT2+CT3+CT4+CT5) 1,41 (YT1i-YT2) / DM2R2 0,60 T12 / T34 0,05 YT1i / lmgH 1,25 T45 / T34 0,70 YT1i / YT2 2,14 N2 1,669 YM2 / YT2 1,89 V2+V4 43,0 - - 7. Embodiment

[0145] Fig. 13 is a schematic view of an image acquisition unit according to the 7th embodiment of the present disclosure. Fig. Figure 14 shows, in order from left to right, spherical aberration curves, astigmatic field curves, and a distortion curve of the image pickup unit according to the 7th embodiment. Fig.13, the image pickup unit 7 includes the photographic optical lens assembly (its reference numeral is omitted) of the present disclosure and an image sensor IS. The photographic optical lens assembly includes, in order from an object side to an image side along a central axis, a diaphragm S1, a first lens element E1, an aperture stop ST, a second lens element E2, a third lens element E3, a stop S2, a fourth lens element E4, a fifth lens element E5, a filter E6, and an image surface IMG. The photographic optical lens assembly includes five lens elements (E1, E2, E3, E4, and E5), and no additional lens element is arranged between the adjacent five lens elements.

[0146] The first lens element E1 has a first refractive surface E1_1 facing the object side and located in an edge region of an object-side surface (its reference numeral is omitted) of the first lens element E1, a first reflective surface E1_2 facing the object side and located in an edge region of an image-side surface (its reference numeral is omitted) of the first lens element E1, a second reflective surface E1_3 facing the image side and located in a central region of the object-side surface of the first lens element E1, and a second refractive surface E1_4 facing the image side and located in a central region of the image-side surface of the first lens element E1. The second refractive surface E1_4 is concave in a paraxial region thereof.The first lens element E1 is made of plastic material and has the first refractive surface E1_1, the first reflective surface E1_2, the second reflective surface E1_3 and the second refractive surface E1_4, all of which are aspherical.

[0147] The second lens element E2 with negative refractive power has an object-side surface that is convex in a paraxial region thereof and an image-side surface that is concave in a paraxial region thereof. The second lens element E2 is made of plastic material and has an object-side surface and an image-side surface, both of which are aspherical. The image-side surface of the second lens element E2 has an inflection point.

[0148] The third lens element E3 with positive refractive power has an object-side surface that is convex in a paraxial region thereof and an image-side surface that is concave in a paraxial region thereof. The third lens element E3 is made of plastic material and has the object-side surface and the image-side surface, both of which are aspherical. 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 concave critical point in an off-axis region thereof. The image-side surface of the third lens element E3 has a convex critical point in an off-axis region thereof.

[0149] The fourth lens element E4 with negative refractive power has an object-side surface that is convex in a paraxial region thereof and an image-side surface that is concave in a paraxial region thereof. The fourth lens element E4 is made of plastic material and has an object-side surface and an image-side surface, both of which are aspherical. The object-side surface of the fourth lens element E4 has two inflection points. The image-side surface of the fourth lens element E4 has one inflection point. The object-side surface of the fourth lens element E4 has a concave critical point in an off-axis region thereof. The image-side surface of the fourth lens element E4 has a convex critical point in an off-axis region thereof.

[0150] The fifth lens element E5 with positive refractive power has an object-side surface that is convex in a paraxial region thereof and an image-side surface that is concave in a paraxial region thereof. The fifth lens element E5 is made of plastic material and has the object-side surface and the image-side surface, both of which are aspherical. The object-side surface of the fifth lens element E5 has two inflection points. The image-side surface of the fifth lens element E5 has two inflection points. The object-side surface of the fifth lens element E5 has a convex critical point and a concave critical point in an off-axis region thereof. The image-side surface of the fifth lens element E5 has a convex critical point in an off-axis region thereof.

[0151] The E6 filter is made of glass and is located between the fifth lens element E5 and the image surface IMG. It does not affect the focal length of the photographic optical lens assembly. The IS image sensor is located on or near the image surface IMG of the photographic optical lens assembly.

[0152] The detailed optical data of the 7th embodiment are shown in Table 7A and the aspherical surface data in Table 7B below. TABLE 7A 7. Embodiment f = 14.24 mm, Fno = 1.70, HFOV = 9.7 degrees Surface # radius of curvature thickness material index Abbé # Refractive / Reflective focal length 0 object Even Infinite Refractive 1 aperture Even -0,512 Refractive 2 Lens 1 edge area 18,3187 (ASP) 3,260 plastic 1,545 56,1 Refractive - 3 -10,7380 (ASP) -2,689 plastic 1,545 56,1 Reflective - 4 Lens 1 Central Area -6,4708 (ASP) 2,262 plastic 1,545 56,1 Reflective - 5 19,2339 (ASP) 0,156 Refractive 6 Ap. aperture Even -0,091 Refractive 7 Lens 2 128,3017 (ASP) 0,320 plastic 1,686 18,4 Refractive -7,18 8 4,7415 (ASP) 0,402 Refractive 9 Lens 3 5,0719 (ASP) 0,513 plastic 1,669 19,5 Refractive 28,05 10 6,6687 (ASP) 0,141 Refractive 11 aperture Even 0,418 Refractive 12 Lens 4 15,2955 (ASP) 0,355 plastic 1,587 28,3 Refractive -754,62 13 14,6582 (ASP) 0,213 Refractive 14 Lens 5 21,0903 (ASP) 0,782 plastic 1,544 56,0 Refractive 2030,95 15 21,2198 (ASP) 0,316 Refractive 16 filter Even 0,210 Glass 1,517 64,2 Refractive - 17 Even 0,812 Refractive 18 Picture Even - Refractive Note: The reference wavelength is 587.6 nm (d-line). An effective radius of the aperture S1 (surface 1) is 5,100 mm. An effective radius of the aperture S2 (surface 11) is 1.472 mm. TABLE 7B Aspherical coefficients Surface # 2 3 4 5 k = -6,549880E+00 -4,521440E-01 -3,691690E+00 -1,579780E+01 A4 = -1,919186E-04 5,668060E-05 -8,039490E-05 1,886010E-02 A6 = -7,119912E-07 -1,237188E-05 5,460883E-05 -1,023567E-01 A8 = 1,152255E-07 4,697026E-06 -5,932263E-06 2,613733E-01 A10 = - -1,039836E-06 1,358033E-07 -7,068512E-01 A12 = - 1,535172E-07 - 1,469559E+00 A14 = - -1,557039E-08 - -2,054212E+00 A16 = - 1,101846E-09 - 1,924677E+00 A18 = - -5,434401E-11 - -1,218148E+00 A20 = - 1,831374E-12 - 5,154241E-01 A22 = - -4,019877E-14 - -1,399254E-01 A24 = - 5,178356E-16 - 2,205843E-02 A26 = - -2,969265E-18 - -1,536100E-03 Surface # 7 8 9 10 k = -9,900000E+01 6,389040E+00 1,306420E+01 2,402130E+00 A4 = 9,031149E-02 7,233362E-02 -6,710752E-02 -5,502485E-02 A6 = -8,378719E-02 -7,796497E-02 6,756436E-02 1,048745E-02 A8 = 1,008934E-02 1,413038E-01 -3,189280E-01 -9,461057E-03 A10 = 1,326504E-01 -2,217670E-01 8,019365E-01 -2,382799E-02 A12 = -2,029815E-01 2,651694E-01 -1,235371E+00 7,811095E-02 A14 = 1,488852E-01 -2,172564E-01 1,181507E+00 -9,484668E-02 A16 = -6,089502E-02 1,108516E-01 -6,857146E-01 6,024402E-02 A18 = 1,328577E-02 -3,145267E-02 2,210117E-01 -1,991828E-02 A20 = -1,203190E-03 3,683703E-03 -3,051720E-02 2,719004E-03 Surface # 12 13 14 15 k = 8,128180E+01 5,159740E+01 8,195030E+01 7,985350E+01 A4 = -9,816664E-02 -1,771764E-01 -1,847209E-01 -8,326780E-02 A6 = 8,265340E-02 1,673392E-01 1,550298E-01 3,378161E-02 A8 = -1,572155E-01 -1,194541E-01 -9,091699E-02 -1,015881E-02 A10 = 2,265126E-01 5,741526E-02 5,636267E-02 -6,306549E-05 A12 = -2,522508E-01 -1,644732E-02 -3,057433E-02 1,586925E-03 A14 = 1,855756E-01 1,006616E-03 1,084276E-02 -6,908491E-04 A16 = -8,313268E-02 6,614113E-04 -2,250525E-03 1,383308E-04 A18 = 2,023446E-02 -1,156153E-04 2,493117E-04 -1,334265E-05 A20 = -2,015931E-03 - -1,142482E-05 4,975096E-07

[0153] In the 7th embodiment, the equation for the aspherical surface profiles of the above-mentioned lens elements is the same as that of the 1st embodiment. The definitions of these parameters shown in Table 7C are also the same as those given in the 1st embodiment, with corresponding values ​​for the 7th embodiment, so no further explanation is given in this regard.

[0154] In addition, these parameters can be calculated from Table 7A and Table 7B as the following values ​​and satisfy the following conditions: TABLE 7C Schematic parameters f [mm] 14,24 V3 19,5 Fno 1,70 Sag4R1 / CT4 -1,06 HFOV [degree] 9,7 YT1o [mm] 5,10 DM2l / f 0,48 YT1i [mm] 2,90 |f / f2| / (|f / f3|+|f / f4|+|f / f5|) 3,72 YM1o [mm] 4,96 10x|f2 / f5| 0,04 YM1i [mm] 2,70 (RM2+R4) / (RM2-R4) 0,15 YM2 [mm] 2,37 (R3+R4) / (R3-R4) 1,08 YT2 [mm] 1,48 (R4+R9) / (R4-R9) -1,58 0,5×f / YT1o2−YT1i2 1,70 DM2M1i / DM2R4 0,89 YT1o / DM2R2 2,25 DM2R2 / (CT2+CT3+CT4+CT5) 1,15 (YT1i-YT2) / DM2R2 0,63 T12 / T34 0,12 YT1i / lmgH 1,16 T45 / T34 0,38 YT1i / YT2 1,96 N2 1,686 YM2 / YT2 1,60 V2+V4 46,7 - - 8. Embodiment

[0155] Fig. 15 is a schematic view of an image acquisition unit according to the 8th embodiment of the present disclosure. Fig. Fig. 16 shows, in order from left to right, spherical aberration curves, astigmatic field curves, and a distortion curve of the image acquisition unit according to the 8th embodiment. In Fig.15, the image capture unit 8 includes the photographic optical lens assembly (its reference numeral is omitted) of the present disclosure and an image sensor IS. The photographic optical lens assembly includes, in order from an object side to an image side along a central axis, a diaphragm S1, a first lens element E1, an aperture stop ST, a second lens element E2, a third lens element E3, a stop S2, a fourth lens element E4, a fifth lens element E5, a filter E6, and an image surface IMG. The photographic optical lens assembly includes five lens elements (E1, E2, E3, E4, and E5), and no additional lens element is arranged between the adjacent five lens elements.

[0156] The first lens element E1 has a first refractive surface E1_1 facing the object side and located in an edge region of an object-side surface (its reference numeral is omitted) of the first lens element E1, a first reflective surface E1_2 facing the object side and located in an edge region of an image-side surface (its reference numeral is omitted) of the first lens element E1, a second reflective surface E1_3 facing the image side and located in a central region of the object-side surface of the first lens element E1, and a second refractive surface E1_4 facing the image side and located in a central region of the image-side surface of the first lens element E1. The second refractive surface E1_4 is convex in a paraxial region thereof.The first lens element E1 is made of plastic material and has the first refractive surface E1_1, the first reflective surface E1_2, the second reflective surface E1_3 and the second refractive surface E1_4, all of which are aspherical.

[0157] The second lens element E2 with negative refractive power has an object-side surface that is concave in a paraxial region thereof and an image-side surface that is concave in a paraxial region thereof. The second lens element E2 is made of plastic material and has the object-side surface and the image-side surface, both of which are aspherical. The object-side surface of the second lens element E2 has an inflection point. The object-side surface of the second lens element E2 has a convex critical point in an off-axis region thereof.

[0158] The third lens element E3 with positive refractive power has an object-side surface that is convex in a paraxial region thereof and an image-side surface that is concave in a paraxial region thereof. The third lens element E3 is made of plastic material and has an object-side surface and an image-side surface, both of which are aspherical. 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 concave critical point in an off-axis region thereof. The image-side surface of the third lens element E3 has a convex critical point in an off-axis region thereof.

[0159] The fourth lens element E4 with negative refractive power has an object-side surface that is concave in a paraxial region thereof and an image-side surface that is concave in a paraxial region thereof. The fourth lens element E4 is made of plastic material and has the object-side surface and the image-side surface, both of which are aspherical. The object-side surface of the fourth lens element E4 has one inflection point. The image-side surface of the fourth lens element E4 has two inflection points. The image-side surface of the fourth lens element E4 has a convex critical point in an off-axis region thereof.

[0160] The fifth lens element E5 with positive refractive power has an object-side surface that is convex in a paraxial region thereof and an image-side surface that is convex in a paraxial region thereof. The fifth lens element E5 is made of plastic material and has the object-side surface and the image-side surface, both of which are aspherical. The object-side surface of the fifth lens element E5 has four inflection points. The image-side surface of the fifth lens element E5 has one inflection point. The object-side surface of the fifth lens element E5 has a convex critical point and a concave critical point in an off-axis region thereof.

[0161] The E6 filter is made of glass and is located between the fifth lens element E5 and the image surface IMG. It does not affect the focal length of the photographic optical lens assembly. The IS image sensor is located on or near the image surface IMG of the photographic optical lens assembly.

[0162] The detailed optical data of the 8th embodiment are shown in Table 8A and the aspherical surface data in Table 8B below. TABLE 8A 8. Embodiment f = 13.46 mm, Fno = 1.69, HFOV = 9.7 degrees Surface # radius of curvature thickness material index Abbé # Refractive / Reflective focal length 0 object Even Infinite Refractv 1 aperture Even -0,512 Refractv 2 Lens 1 edge area 17,7589 (ASP) 3,199 plastic 1,534 56,0 Refractv - 3 -10,9308 (ASP) -2,637 plastic 1,534 56,0 Reflective - 4 Lens 1 Central Area -6,7954 (ASP) 2,637 plastic 1,534 56,0 Reflective - 5 -10,9308 (ASP) 0,314 Refractv 6 Ap. aperture Even -0,006 Refractv 7 Lens 2 -13,6226 (ASP) 0,345 plastic 1,669 19,5 Refractv -4,60 8 4,0161 (ASP) 0,375 Refractv 9 Lens 3 5,8804 (ASP) 0,436 plastic 1,660 20,4 Refractv 15,75 10 13,1406 (ASP) 0,031 Refractv 11 aperture Even 0,440 Refractv 12 Lens 4 -450,2165 (ASP) 0,506 plastic 1,669 19,5 Refractv -18,42 13 12,6734 (ASP) 0,036 Refractv 14 Lens 5 24,8364 (ASP) 0,679 plastic 1,544 56,0 Refractv 26,49 15 -34,0171 (ASP) 0,316 Refractv 16 filter Even 0,210 Glass 1,517 64,2 Refractv - 17 Even 0,502 Refractv 18 Picture Even - Refractv Note: The reference wavelength is 587.6 nm (d-line). An effective radius of the aperture S1 (surface 1) is 5,000 mm. An effective radius of the stop S2 (surface 11) is 1.451 mm. TABLE 8B Aspherical coefficients Surface # 2 3 4 5 k = -5,885480E+00 -4,305010E-01 -3,544010E+00 -4,305010E-01 A4 = -1,834770E-04 4,176248E-05 -2,674177E-06 4,176248E-05 A6 = -1,230047E-09 -3,858049E-07 2,222527E-05 -3,858049E-07 A8 = 7,446624E-08 2,994187E-07 -5,113097E-06 2,994187E-07 A10 = - -4,166456E-08 1,497875E-07 -4,166456E-08 A12 = - 3,636062E-09 - 3,636062E-09 A14 = - -1,969021E-10 - -1,969021E-10 A16 = - 6,448452E-12 - 6,448452E-12 A18 = - -1,167732E-13 - -1,167732E-13 A20 = - 8,962057E-16 - 8,962057E-16 Surface # 7 8 9 10 k = -4,329930E+01 6,068080E+00 1,086020E+01 -1,372850E+01 A4 = 6,309141E-02 4,905097E-02 -4,864470E-02 -4,473019E-02 A6 = 1,642845E-02 4,647659E-02 -1,864154E-02 -1,974561E-02 A8 = -1,814191E-01 -3,712193E-01 8,554096E-02 1,423148E-01 A10 = 5,102474E-01 1,235689E+00 -2,560513E-01 -3,914934E-01 A12 = -8,313508E-01 -2,481909E+00 3,921506E-01 5,733127E-01 A14 = 8,392001E-01 3,103437E+00 -3,689401E-01 -5,134022E-01 A16 = -5,136306E-01 -2,353970E+00 2,065554E-01 2,773756E-01 A18 = 1,744450E-01 9,910740E-01 -6,299907E-02 -8,278550E-02 A20 = -2,520390E-02 -1,775273E-01 8,189982E-03 1,057014E-02 Surface # 12 13 14 15 k = 9,900000E+01 4,984740E+01 8,479000E+01 -9,900000E+01 A4 = -8,625804E-02 -2,605022E-01 -2,586557E-01 -3,394411E-02 A6 = 2,119629E-02 3,283987E-01 3,777090E-01 1,816316E-02 A8 = 7,062077E-02 -3,212656E-01 -3,846988E-01 -3,092395E-02 A10 = -2,279128E-01 1,930690E-01 2,523883E-01 2,984413E-02 A12 = 2,943233E-01 -6,851509E-02 -1,019484E-01 -1,766729E-02 A14 = -2,149018E-01 1,283174E-02 2,466863E-02 6,505570E-03 A16 = 8,816199E-02 -9,011408E-04 -3,372425E-03 -1,434543E-03 A18 = -1,842319E-02 -1,821373E-05 2,243112E-04 1,715346E-04 A20 = 1,505934E-03 - -4,510814E-06 -8,472263E-06

[0163] In the 8th embodiment, the equation of the aspherical surface profiles of the above lens elements is the same as the equation of the 1st embodiment.

[0164] The definitions of these parameters in Table 8C are also the same as in Embodiment 1 with corresponding values ​​for Embodiment 8, so no further explanation is given in this regard.

[0165] In addition, these parameters can be calculated from Table 8A and Table 8B as the following values ​​and satisfy the following conditions: TABLE 8C Schematic parameters f [mm] 13,46 V3 20,4 Fno 1,65 Sag4R1 / CT4 -0,77 HFOV [degree] 9,7 YT1o [mm] 5,00 DM2l / f 0,51 YT1i [mm] 2,90 |f / f2| / (|f / f3|+|f / f4|+|f / f5|) 1,40 YM1o [mm] 4,86 10x|f2 / f5| 1,74 YM1i [mm] 2,70 (RM2+R4) / (RM2-R4) 0,26 YM2 [mm] 2,35 (R3+R4) / (R3-R4) 0,54 YT2 [mm] 1,38 (R4+R9) / (R4-R9) -1,39 0,5×f / YT1o2−YT1i2 1,65 DM2M1i / DM2R4 0,70 YT1o / DM2R2 1,90 DM2R2 / (CT2+CT3+CT4+CT5) 1,34 (YT1i-YT2) / DM2R2 0,58 T12 / T34 0,65 YT1i / lmgH 1,23 T45 / T34 0,08 YT1i / YT2 2,10 N2 1,669 YM2 / YT2 1,70 V2+V4 39,0 - - 9. Embodiment

[0166] Fig.17 is a perspective view of an image sensing unit according to the ninth embodiment of the present disclosure. In this embodiment, an image sensing unit 100 is a camera module including a lens unit 101, a driving device 102, an image sensor 103, and an image stabilizer 104. The lens unit 101 includes the photographic optical lens assembly disclosed in the first embodiment, a housing, and a support member (the reference numerals of which are omitted) for supporting the photographic optical lens assembly. However, the lens unit 101 may alternatively be provided with the photographic optical lens assembly disclosed in other embodiments of the present disclosure, and the present disclosure is not limited thereto.The imaging light converges in the lens unit 101 of the image acquisition unit 100 to form an image, the drive device 102 is used to focus the image on the image sensor 103, and the formed image is then digitally transmitted to another electronic component for further processing.

[0167] The drive device 102 may have an autofocus function, and various drive configurations can be achieved by using voice coil motors (VCMs), microelectromechanical systems (MEMS), piezoelectric systems, or shape memory alloys. The drive device 102 is advantageous for obtaining a better imaging position of the lens unit 101, so that a clear image of the imaged object can be captured by the lens unit 101 at different distances from the object. The image sensor 103 (e.g., CCD or CMOS), which may have high light sensitivity and low noise, is arranged on the image surface of the photographic optical lens assembly to achieve higher image quality.

[0168] The image stabilizer 104, such as an accelerometer, a gyro sensor, and a Hall-effect sensor, is configured to work with the drive device 102 to enable optical image stabilization (OIS). The drive device 102, working in conjunction with the image stabilizer 104, is beneficial for compensating for pan and tilt movements of the lens unit 101 to reduce motion blur during exposure. In some cases, compensation can be achieved through electronic image stabilization (EIS) using image processing software, improving image quality during motion or low-light conditions. 10. Embodiment

[0169] Fig. 18 is a perspective view of an electronic device according to the 10th embodiment of the present disclosure. Fig. 19 is another perspective view of the electronic device in Fig. 18.

[0170] In this embodiment, an electronic device 200 is a smartphone that includes the image capture unit 100 disclosed in the 9th embodiment, an image capture unit 100a, an image capture unit 100b, an image capture unit 100c, and a display unit 201. As shown in Fig. As shown in Figure 18, the image capture unit 100, the image capture unit 100a, and the image capture unit 100b are arranged on the same side of the electronic device 200 and face the same side, and each of the image capture units 100, 100a, and 100b has a single focal point. As shown in Fig.As shown in Figure 19, the image capture unit 100c and the display unit 201 are arranged on the opposite side of the electronic device 200, so the image capture unit 100c may be a front-facing camera of the electronic device 200 for taking selfies, but the present disclosure is not limited thereto. Furthermore, each of the image capture units 100a, 100b, and 100c may include the photographic optical lens assembly of the present disclosure and have a similar configuration to the image capture unit 100.Specifically, each of the image capturing units 100a, 100b, and 100c may include a lens unit, a driving device, an image sensor, and an image stabilizer, and each of the lens units may include a photographic optical lens assembly such as the photographic optical lens assembly of the present disclosure, a housing, and a support member for supporting the photographic optical lens assembly.

[0171] The image capture unit 100 is a telephoto image capture unit, the image capture unit 100a is a wide-angle image capture unit, the image capture unit 100b is an ultra-wide-angle image capture unit, and the image capture unit 100c is a wide-angle image capture unit. In this embodiment, the image capture units 100, 100a, and 100b have different fields of view, so that the electronic device 200 can have different magnification ratios to meet the requirements of the optical zoom functionality. Furthermore, as shown in Fig.19, the image sensing unit 100c may have a non-circular opening, and the lens barrel or the lens elements in the image sensing unit 100c may have one or more trimmed edges at positions on the outer diameter thereof corresponding to the non-circular opening. Therefore, it is advantageous to further reduce the length of the image sensing unit 100c along a single axis, thereby reducing the overall size of the lens, increasing the area ratio of the display unit 201 with respect to the electronic device 200, reducing the thickness of the electronic device 200, and achieving compactness of the overall module. In this embodiment, the electronic device 200 includes a plurality of image sensing units 100, 100a, 100b, and 100c, but the present disclosure is not limited to the number and arrangement of the image sensing units. 11. Embodiment

[0172] Fig.20 is a perspective view of an electronic device according to the 11th embodiment of the present disclosure. Fig. 21 is another perspective view of the electronic device in Fig. 20. Fig. 22 is a block diagram of the electronic device in Fig. 20.

[0173] In this embodiment, an electronic device 300 is a smartphone that includes the image capture unit 100 disclosed in the ninth embodiment, an image capture unit 100d, an image capture unit 100e, an image capture unit 100f, an image capture unit 100g, an image capture unit 100h, a flash module 301, a focus assist module 302, an image signal processor 303, a display module 304, and an image software processor 305. The image capture unit 100, the image capture unit 100d, and the image capture unit 100e are arranged on the same side of the electronic device 300. The focus assist module 302 may be a laser distance meter or a ToF (Time of Flight) module, but the present disclosure is not limited thereto.The image capture unit 100f, the image capture unit 100g, the image capture unit 100h, and the display module 304 are arranged on the opposite side of the electronic device 300. The display module 304 may be a user interface, so the image capture units 100f, 100g, and 100h may be front-facing cameras of the electronic device 300 for taking selfies, but the present disclosure is not limited thereto. Furthermore, each of the image capture units 100d, 100e, 100f, 100g, and 100h may include the photographic optical lens assembly of the present disclosure and have a similar configuration to the image capture unit 100.Specifically, each of the image capture units 100d, 100e, 100f, 100g, and 100h may include a lens unit, a driving device, an image sensor, and an image stabilizer, and each of the lens units may include a photographic optical lens assembly such as the photographic optical lens assembly of the present disclosure, a housing, and a support member for supporting the photographic optical lens assembly.

[0174] Image capture unit 100 is a telephoto image capture unit, image capture unit 100d is a wide-angle image capture unit, image capture unit 100e is an ultra-wide-angle image capture unit, image capture unit 100f is a wide-angle image capture unit, image capture unit 100g is an ultra-wide-angle image capture unit, and image capture unit 100h is a time-of-flight image capture unit. In this embodiment, image capture units 100, 100d, and 100e have different fields of view, allowing electronic device 300 to have different magnification ratios to meet the requirements of the optical zoom functionality. Additionally, image capture unit 100h can determine depth information of the imaged object.In this embodiment, the electronic device 300 includes a plurality of image capture units 100, 100d, 100e, 100f, 100g, and 100h, but the present disclosure is not limited to the number and arrangement of the image capture units.

[0175] When a user captures images of an object 306, the light beams converge in the image capture unit 100, the image capture unit 100d, or the image capture unit 100e to create images, and the flash module 301 is activated to amplify the light. The focus assist module 302 detects the distance of the imaged object 306 to achieve fast automatic focusing. 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 capture unit 100f, 100g, or 100h to create images.The display module 304 may include a touchscreen, and the user may interact with the display module 304 and the image software processor 305, which provides multiple functions for image acquisition and complete image processing. Alternatively, the user may capture images using a physical button. The image processed by the image software processor 305 may be displayed on the display module 304. 12. Embodiment

[0176] Fig. 23 is a perspective view of an electronic device according to the 12th embodiment of the present disclosure.

[0177] In this embodiment, an electronic device 400 is a smartphone that includes an image capture unit 100', an image capture unit 100i, an image capture unit 100j, a flash module 401, a focus assist module, an image signal processor, a display module, and an image software processor (not shown). The image capture unit 100', the image capture unit 100i, and the image capture unit 100j 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. The image capture unit 100' includes the image capture unit 100 disclosed in the ninth embodiment. Furthermore, each of the image capture units 100i and 100j may include the photographic optical lens assembly of the present disclosure and have a similar configuration to the image capture unit 100, and the details thereof will not be repeated.

[0178] The image capture unit 100' is a telephoto image capture unit, the image capture unit 100i is a wide-angle image capture unit, and the image capture unit 100j is an ultra-wide-angle image capture unit. In this embodiment, the image capture units 100', 100i, and 100j have different fields of view, so that the electronic device 400 can have different magnification ratios to meet the requirements of the optical zoom function. In this embodiment, the electronic device 400 includes multiple image capture units 100', 100i, and 100j, but the present disclosure is not limited to the number and arrangement of the image capture units. When a user captures images of an object, light rays converge in the image capture unit 100', 100i, or 100j to create images, and the flash module 401 is activated to amplify the light.In addition, the subsequent processes are carried out in a similar manner to the above-mentioned embodiment, so the details thereof will not be repeated. 13. Embodiment

[0179] Fig. 24 is a perspective view of an electronic device according to the 13th embodiment of the present disclosure.

[0180] In this embodiment, an electronic device 500 is a smartphone that includes the image capture unit 100 disclosed in the 9th embodiment, an image capture unit 100k, an image capture unit 100m, an image capture unit 100n, an image capture unit 100p, an image capture unit 100q, an image capture unit 100r, an image capture unit 100s, an image capture unit 100t, a flash module 501, a focus assist module, an image signal processor, a display module, and an image software processor (not shown). The image capture units 100, 100k, 100m, 100n, 100p, 100q, 100r, 100s and 100t 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 capture units 100k, 100m, 100n, 100p, 100q, 100r, 100s, and 100t may include the photographic optical lens assembly of the present disclosure and have a similar configuration to the image capture unit 100, and the details thereof will not be repeated.

[0181] The image capture unit 100 is a telephoto image capture unit, the image capture unit 100k is a telephoto image capture unit, the image capture unit 100m is a telephoto image capture unit, the image capture unit 100n is a telephoto image capture unit, the image capture unit 100p is a wide-angle image capture unit, the image capture unit 100q is a wide-angle image capture unit, the image capture unit 100r is an ultra-wide-angle image capture unit, the image capture unit 100s is an ultra-wide-angle image capture unit, and the image capture unit 100t is a time-of-flight image capture unit. In this embodiment, the image capture units 100, 100k, 100m, 100n, 100p, 100q, 100r, and 100s have different fields of view so that the electronic device 500 can have different magnification ratios to meet the requirements of the optical zoom functionality.Furthermore, the image capture unit 100t can determine depth information of the imaged object. In this embodiment, the electronic device 500 includes a plurality of image capture units 100, 100k, 100m, 100n, 100p, 100q, 100r, 100s, and 100t, but the present disclosure is not limited to the number and arrangement of the image capture units. When a user captures images of an object, the light beams converge in the image capture unit 100, 100k, 100m, 100n, 100p, 100q, 100r, 100s, or 100t to create images, and the flash module 501 is activated to amplify the light. The subsequent processes are performed in a similar manner to the above-mentioned embodiments, and the details thereof will not be repeated.

[0182] The smartphone in several embodiments is only an example of illustrating the image sensing unit of the present disclosure installed in an electronic device, and the present disclosure is not limited thereto. The image sensing unit can optionally be applied to moving-focus optical systems. Furthermore, the photographic optical lens assembly of the image sensing unit features good aberration correction capability and high image quality, and can be used for 3D image sensing applications in products such as digital cameras, mobile devices, digital tablets, smart TVs, network monitoring devices, dashboard cameras, vehicle rearview cameras, multi-camera devices, image recognition systems, motion-sensitive input devices, wearable devices, and other electronic imaging devices.

[0183] The foregoing description has been made with reference to specific embodiments for purposes of illustration. It should be noted that TABLES 1A-8C show different data for the various embodiments; however, the data for the various embodiments are derived from experiments. The embodiments were chosen and described in order to best explain the principles of the disclosure and their practical applications, to enable others skilled in the art to best utilize the disclosure and various embodiments with various modifications as are suited to their particular use. The above-illustrated embodiments and the accompanying drawings are exemplary and are not intended to be exhaustive or to limit the scope of the present disclosure to the precise forms disclosed. Many modifications and variations are possible in light of the above teachings.

Claims

[1] A photographic optical lens assembly comprising five lens elements (E1, E2, E3, E4, E5), the five lens elements (E1, E2, E3, E4, E5) being, in order from an object side to an image side along an optical path, a first lens element (E1), a second lens element (E2), a third lens element (E3), a fourth lens element (E4), and a fifth lens element (E5), and each of the five lens elements (E1, E2, E3, E4, E5) has an object-side surface facing the object side and an image-side surface facing the image side; wherein each of the object-side surface and the image-side surface of the first lens element (E1) has a central region (AC1, AC2) and an edge region (AP1, AP2), the edge region (AP1) of the object-side surface of the first lens element (E1) has a first refractive surface (E1_1), the edge region (AP2) of the image-side surface of the first lens element (E1) has a first reflective surface (E1_2), the central region (AC1) of the object-side surface of the first lens element (E1) has a second reflective surface (E1_3), and the central region (AC2) of the image-side surface of the first lens element (E1) has a second refractive surface (E1_4); wherein a distance parallel to a central axis between an axial vertex on the second reflecting surface (E1_3) and a position with a minimum effective radius on the first reflecting surface (E1_2) is DM2M1i, an axial distance between the second reflecting surface (E1_3) and the image-side surface of the second lens element (E2) is DM2R4, an axial distance between the second reflecting surface (E1_3) and an image surface (IMG) is DM2I, a focal length of the photographic optical lens assembly is f, an axial distance between the third lens element (E3) and the fourth lens element (E4) is T34, an axial distance between the fourth lens element (E4) and the fifth lens element (E5) is T45, and the following conditions are met: 0.30 <DM2M1i / DM2R4<1,00; 0.35 <DM2I / f<0,80; und 0.05 <T45 / T34<2,50. [2] A photographic optical lens assembly according to claim 1, wherein the distance parallel to the central axis between the axial vertex on the second reflecting surface (E1_3) and the position of minimum effective radius on the first reflecting surface (E1_2) is DM2M1i, the axial distance between the second reflecting surface (E1_3) and the image-side surface of the second lens element (E2) is DM2R4, and the following condition is satisfied: 0.50 <DM2M1i / DM2R4<0,95 [3] A photographic optical lens assembly according to claim 1, wherein the axial distance between the second reflecting surface (E1_3) and the image surface (IMG) is DM2I, the focal length of the photographic optical lens assembly is f, and the following condition is satisfied: 0.40 <DM2I / f<0,60. [4] A photographic optical lens assembly according to claim 1, wherein the second lens element (E2) has a negative refractive power, and at least one of the object-side surface and the image-side surface of at least one lens element from the second lens element (E2) to the fifth lens element (E5) has at least one inflection point (P). [5] A photographic optical lens assembly according to claim 1, wherein a radius of curvature of the image-side surface of the second lens element (E2) is R4, a radius of curvature of the object-side surface of the fifth lens element (E5) is R9, and the following condition is satisfied: −10.00<(R4+R9) / (R4−R9)<0. [6] A photographic optical lens assembly according to claim 1, wherein an axial distance between the second reflective surface (E1_3) and the second refractive surface (E1_4) is DM2R2, a central thickness of the second lens element (E2) is CT2, a central thickness of the third lens element (E3) is CT3, a central thickness of the fourth lens element (E4) is CT4, a central thickness of the fifth lens element (E5) is CT5, and the following condition is satisfied: 1.00 <DM2R2 / (CT2+CT3+CT4+CT5)<2,50 [7] A photographic optical lens assembly according to claim 1, wherein a focal length of the second lens element (E2) is f2, a focal length of the fifth lens element (E5) is f5, and the following condition is satisfied: 0<10×|f2 / f5|<9.

00. [8] A photographic optical lens assembly according to claim 1, wherein an axial distance between the first lens element (E1) and the second lens element (E2) is T12, the axial distance between the third lens element (E3) and the fourth lens element (E4) is T34, and the following condition is satisfied: 0 <T12 / T34<1,20. [9] A photographic optical lens assembly according to claim 1, wherein the second refractive surface (E1_4) is convex in a paraxial region thereof. [10] A photographic optical lens assembly according to claim 1, wherein a maximum effective radius of the first refractive surface (E1_1) is YT1o, an axial distance between the second reflecting surface (E1_3) and the second refractive surface (E1_4) is DM2R2, and the following condition is satisfied: 1.50 <YT1o / DM2R2<3,00. [11] A photographic optical lens assembly according to claim 1, wherein a minimum effective radius of the first refractive surface (E1_1) is YT1i, a maximum image height of the photographic optical lens assembly is ImgH, and the following condition is satisfied: 0.90 <YT1i / lmgH<2,00. [12] A photographic optical lens assembly according to claim 1, wherein a minimum effective radius of the first refractive surface (E1_1) is YT1i, a maximum effective radius of the second refractive surface (E1_4) is YT2, and the following condition is satisfied: 1.20 <YT1i / YT2<3,50. [13] A photographic optical lens assembly according to claim 1, wherein an Abbe number of the second lens element (E2) is V2, an Abbe number of the fourth lens element (E4) is V4, and the following condition is satisfied: 20.0 <V2+V4<70,0. [14] A photographic optical lens assembly according to claim 1, wherein along a propagation sequence of the optical path, incident light enters the first lens element (E1) via the first refractive surface (E1_1), is then reflected by the first reflective surface (E1_2), is subsequently reflected by the second reflective surface (E1_3), and finally exits the first lens element (E1) via the second refractive surface (E1_4). [15] A photographic optical lens assembly according to claim 1, wherein the object-side surface of the first lens element (E1) further includes a light-blocking region (AB1) disposed between the central region (AC1) and the peripheral region (AP1) thereof, and the image-side surface of the first lens element (E1) further includes a light-blocking region (AB2) disposed between the central region (AC2) and the peripheral region (AP2) thereof. [16] Image acquisition unit (100) comprising: the photographic optical lens assembly according to claim 1; and an image sensor (103) arranged on the image surface (IMG) of the photographic optical lens arrangement. [17] Electronic device (200) comprising: the image capture unit (100) according to claim 16. [18] A photographic optical lens assembly comprising five lens elements (E1, E2, E3, E4, E5), wherein the five lens elements (E1, E2, E3, E4, E5) are, in order from an object side to an image side along an optical path, a first lens element (E1), a second lens element (E2), a third lens element (E3), a fourth lens element (E4), and a fifth lens element (E5), and wherein each of the five lens elements (E1, E2, E3, E4, E5) has an object-side surface facing the object side and an image-side surface facing the image side; wherein each of the object-side surface and the image-side surface of the first lens element (E1) has a central region (AC1, AC2) and an edge region (AP1, AP2), the edge region (AP1) of the object-side surface of the first lens element (E1) has a first refractive surface (E1_1), the edge region (AP2) of the image-side surface of the first lens element (E1) has a first reflective surface (E1_2), the central region (AC1) of the object-side surface of the first lens element (E1) has a second reflective surface (E1_3), and the central region (AC2) of the image-side surface of the first lens element (E1) has a second refractive surface (E1_4); wherein the second lens element (E2) has a negative refractive power and the image-side surface of the second lens element (E2) is concave in a paraxial region thereof; wherein a radius of curvature of the object-side surface of the second lens element (E2) is R3, a radius of curvature of the image-side surface of the second lens element (E2) is R4, a refractive index of the second lens element (E2) is N2, and the following conditions are met: 0.10<(R3+R4) / (R3−R4)<5.00; and 1,560 <N2<1,720. [19] A photographic optical lens assembly according to claim 18, wherein each of said second lens element (E2) to said fifth lens element (E5) is a plastic lens element; wherein 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 satisfied: 0.20<(R3+R4) / (R3−R4)<3.

00. [20] A photographic optical lens assembly according to claim 18, wherein a radius of curvature of the second reflecting surface (E1_3) at a central axis is RM2, the radius of curvature of the image-side surface of the second lens element (E2) is R4, and the following condition is satisfied: −0.10<(RM2+R4) / (RM2−R4)<1.

00. [21] A photographic optical lens assembly according to claim 18, wherein a focal length of the photographic optical lens assembly is f, a focal length of the second lens element (E2) is f2, a focal length of the third lens element (E3) is f3, a focal length of the fourth lens element (E4) is f4, a focal length of the fifth lens element (E5) is f5, and the following condition is satisfied: 0.60<|f / f2| / (|f / f3|+|f / f4|+|f / f5|)<10.

00. [22] A photographic optical lens assembly according to claim 18, wherein an axial distance between the third lens element (E3) and the fourth lens element (E4) is T34, an axial distance between the fourth lens element (E4) and the fifth lens element (E5) is T45, and the following condition is satisfied: 0.05 <T45 / T34<2,50. [23] A photographic optical lens assembly according to claim 18, wherein a focal length of the photographic optical lens assembly is f, a maximum effective radius of the first refractive surface (E1_1) is YT1o, a minimum effective radius of the first refractive surface (E1_1) is YT1i, and the following condition is satisfied: 1.00<0.5×f / YT1o2−YT1i2<2.

00. [24] A photographic optical lens assembly according to claim 18, wherein a displacement parallel to a central axis from an axial vertex on the object-side surface of the fourth lens element (E4) to a position of the maximum effective radius on the object-side surface of the fourth lens element (E4) is Sag4R1, a central thickness of the fourth lens element (E4) is CT4, and the following condition is satisfied: −2.00 <Sag4R1 / CT4<−0,20. [25] A photographic optical lens assembly according to claim 18, wherein a minimum effective radius of the first refractive surface (E1_1) is YT1i, a maximum effective radius of the second refractive surface (E1_4) is YT2, an axial distance between the second reflecting surface (E1_3) and the second refractive surface (E1_4) is DM2R2, and the following condition is satisfied: 0.20<(YT1i−YT2) / DM2R2<1.

00. [26] A photographic optical lens assembly according to claim 18, wherein a maximum effective radius of the second reflecting surface (E1_3) is YM2, a maximum effective radius of the second refractive surface (E1_4) is YT2, and the following condition is satisfied: 1.20 <YM2 / YT2<2,50. [27] A photographic optical lens assembly according to claim 18, wherein an Abbe number of the third lens element (E3) is V3 and the following condition is satisfied: 10.0 <V3<21,0. [28] An imaging optical lens assembly according to claim 18, wherein the second lens element (E2) is arranged closer to the image side than the first reflective surface (E1_2). [29] A photographic optical lens assembly according to claim 18, wherein a distance parallel to a central axis between an axial vertex on the second reflecting surface (E1_3) and a position of minimum effective radius on the first reflecting surface (E1_2) is DM2M1i, an axial distance between the second reflecting surface (E1_3) and the image-side surface of the second lens element (E2) is DM2R4, an axial distance between the second reflecting surface (E1_3) and an image surface (IMG) is DM2I, a focal length of the imaging optical lens assembly is f, an axial distance between the third lens element (E3) and the fourth lens element (E4) is T34, an axial distance between the fourth lens element (E4) and the fifth lens element (E5) is T45, 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, the refractive index of the second lens element (E2) is N2 and the following conditions are met: , 0.70≤DM2M1i / DM2R4≤0.89; 0.47≤DM2I / f≤0.51; 0.08≤T45 / T34≤0.70; 0.37≤(R3+R4) / (R3−R4)≤1.08; and 1.614≤N2≤1.686.

Images