Photographing optical system, image capturing device and electronic device

Abstract

The present disclosure discloses a photographing optical system including six lenses. The six lenses are sequentially a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens from the object side to the image side along an optical path. Each of the six lenses has an object-side surface facing the object-side direction and an image-side surface facing the image-side direction. The first lens element has positive refractive power. The second lens element has negative refractive power. The third lens element has positive refractive power. The fourth lens element with positive refractive power has an object-side surface being concave in a paraxial region thereof. The fifth lens element with negative refractive power has an object-side surface being convex in a paraxial region thereof. The image-side surface of the sixth lens element has at least one inflection point. When specific conditions are met, the photographing optical system can meet the requirements of miniaturization, wide viewing angle and high imaging quality at the same time. The invention further discloses an image capturing device with the photographing optical system and an electronic device with the image capturing device.

Description

Technical Field

[0001] This disclosure relates to a photographic optical system, an image-capturing device, and an electronic device, particularly a photographic optical system and an image-capturing device suitable for electronic devices. Background Technology

[0002] With advancements in semiconductor technology, the performance of electronic image sensors has improved, and pixels can be made smaller. As a result, optical lenses with high image quality have become an indispensable component.

[0003] With the rapid advancement of technology, electronic devices equipped with optical lenses are finding increasingly wider applications, leading to more diverse requirements for these lenses. Since existing optical lenses often struggle to achieve a balance between image quality, sensitivity, aperture size, size, and viewing angle, this invention provides an optical lens with high image quality to meet these demands. Summary of the Invention

[0004] This disclosure provides a photographic optical system, an image capturing device, and an electronic device. The photographic optical system includes six lenses arranged sequentially from the object side to the image side along the light path. Under certain conditions, the photographic optical system provided by this disclosure can simultaneously meet the requirements of miniaturization, wide viewing angle, and high image quality.

[0005] This disclosure provides a photographic optical system comprising six lenses. The six lenses, arranged sequentially from the object side to the image side along the optical path, are a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens. Each of the six lenses has an object-side surface facing the object side and an image-side surface facing the image side. Preferably, the first lens has positive refractive power. Preferably, the second lens has negative refractive power. Preferably, the third lens has positive refractive power. Preferably, the fourth lens has positive refractive power. Preferably, the object-side surface of the fourth lens is concave near the optical axis. Preferably, the fifth lens has negative refractive power. Preferably, the object-side surface of the fifth lens is convex near the optical axis. Preferably, the image-side surface of the sixth lens has at least one inflection point. Wherein, the radius of curvature of the object-side surface of the first lens is R1, the radius of curvature of the image-side surface of the first lens is R2, the distance between the second and third lenses on the optical axis is T23, and the distance between the third and fourth lenses on the optical axis is T34, preferably satisfying the following conditions:

[0006] 0.00 < (R1 + R2) / (R1 - R2); and

[0007] 0.50 <T34 / T23<2.00。

[0008] This disclosure also provides a photographic optical system comprising six lenses. The six lenses, arranged sequentially from the object side to the image side along the optical path, are a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens. Each of the six lenses has an object-side surface facing the object side and an image-side surface facing the image side. Preferably, the first lens has positive refractive power. Preferably, the second lens has negative refractive power. Preferably, the image-side surface of the second lens is concave near the optical axis. Preferably, the fourth lens has positive refractive power. Preferably, the object-side surface of the fourth lens is concave near the optical axis. Preferably, the fifth lens has negative refractive power. Preferably, the object-side surface of the fifth lens is convex near the optical axis. Preferably, the image-side surface of the sixth lens has at least one inflection point. The radius of curvature of the object-side surface of the first lens is R1, and the radius of curvature of the image-side surface of the first lens is R2, preferably satisfying the following conditions:

[0009] 0.50 < (R1 + R2) / (R1 - R2) < 2.50.

[0010] This disclosure also provides a photographic optical system comprising six lenses. The six lenses, arranged sequentially from the object side to the image side along the optical path, are a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens. Each of the six lenses has an object-side surface facing the object side and an image-side surface facing the image side. Preferably, the first lens has positive refractive power. Preferably, the second lens has negative refractive power. Preferably, the third lens has positive refractive power. Preferably, the image-side surface of the third lens is convex near the optical axis. Preferably, the fourth lens has positive refractive power. Preferably, the object-side surface of the fourth lens is concave near the optical axis. Preferably, the fifth lens has negative refractive power. Preferably, the object-side surface of the fifth lens is convex near the optical axis. Preferably, the image-side surface of the sixth lens has at least one inflection point. The radius of curvature of the object-side surface of the first lens is R1, and the radius of curvature of the image-side surface of the first lens is R2, preferably satisfying the following conditions:

[0011] 0.10 < (R1 + R2) / (R1 - R2).

[0012] This disclosure provides an image capturing device, which includes the aforementioned photographic optical system and an electronic photosensitive element, wherein the electronic photosensitive element is disposed on the imaging surface of the photographic optical system.

[0013] This disclosure provides an electronic device that includes the aforementioned image capturing device.

[0014] When (R1+R2) / (R1-R2) satisfies the above conditions, the surface shape and refractive power of the first lens can be adjusted, which helps to increase the viewing angle.

[0015] When T34 / T23 meets the above conditions, it helps to adjust the lens distribution to reduce assembly difficulty.

[0016] The foregoing description of the contents of this disclosure and the following description of the embodiments are used to demonstrate and explain the spirit and principles of this disclosure, and to provide a further explanation of the claims of this disclosure. Attached Figure Description

[0017] Figure 1 A schematic diagram of an image-capturing device according to a first embodiment of this disclosure is shown.

[0018] Figure 2 From left to right, the graphs show the spherical aberration, astigmatism, and distortion curves of the first embodiment.

[0019] Figure 3 A schematic diagram of an image-capturing device according to a second embodiment of the present disclosure is shown.

[0020] Figure 4 From left to right, the graphs show the spherical aberration, astigmatism, and distortion curves of the second embodiment.

[0021] Figure 5 A schematic diagram of an imaging device according to a third embodiment of this disclosure is shown.

[0022] Figure 6 From left to right, the graphs show the spherical aberration, astigmatism, and distortion curves of the third embodiment.

[0023] Figure 7 A schematic diagram of an imaging device according to the fourth embodiment of this disclosure is shown.

[0024] Figure 8 From left to right, the graphs show the spherical aberration, astigmatism, and distortion curves of the fourth embodiment.

[0025] Figure 9 A schematic diagram of an imaging device according to the fifth embodiment of this disclosure is shown.

[0026] Figure 10 From left to right, the graphs show the spherical aberration, astigmatism, and distortion curves of the fifth embodiment.

[0027] Figure 11 A schematic diagram of an imaging device according to the sixth embodiment of this disclosure is shown.

[0028] Figure 12 From left to right, the graphs show the spherical aberration, astigmatism, and distortion curves of the sixth embodiment.

[0029] Figure 13 A schematic diagram of an imaging device according to the seventh embodiment of this disclosure is shown.

[0030] Figure 14 From left to right, the graphs show the spherical aberration, astigmatism, and distortion curves of the seventh embodiment.

[0031] Figure 15 A schematic diagram of an imaging device according to the eighth embodiment of this disclosure is shown.

[0032] Figure 16 From left to right, the graphs show the spherical aberration, astigmatism, and distortion curves of the eighth embodiment.

[0033] Figure 17 A schematic diagram of an imaging device according to the ninth embodiment of this disclosure is shown.

[0034] Figure 18 From left to right, the graphs show the spherical aberration, astigmatism, and distortion curves of the ninth embodiment.

[0035] Figure 19 A schematic diagram of an imaging device according to the tenth embodiment of this disclosure is shown.

[0036] Figure 20 From left to right, the graphs show the spherical aberration, astigmatism, and distortion curves of the tenth embodiment.

[0037] Figure 21 A perspective view of an imaging device according to the eleventh embodiment of this disclosure is shown.

[0038] Figure 22 A perspective view of one side of an electronic device according to the twelfth embodiment of this disclosure is shown.

[0039] Figure 23 Draw Figure 22 A three-dimensional diagram of the other side of the electronic device.

[0040] Figure 24 Draw Figure 22 System block diagram of an electronic device.

[0041] Figure 25 A schematic diagram showing one side of an electronic device according to the thirteenth embodiment of this disclosure is shown.

[0042] Figure 26 Draw Figure 25 A schematic diagram of the other side of the electronic device.

[0043] Figure 27 A perspective view of one side of an electronic device according to the fourteenth embodiment of this disclosure is shown.

[0044] Figure 28 A schematic diagram illustrating the inflection point and critical point on the lens surface according to the first embodiment of this disclosure.

[0045] Figure 29 A schematic diagram illustrating parameters Y1R1, Y6R2, SAG4R1, SAG4R2 and SAG5R2 in the first embodiment according to this disclosure is shown.

[0046] Figure 30 A schematic diagram illustrating an arrangement of an optical path reversing element in a photographic optical system according to the present invention is shown.

[0047] Figure 31 A schematic diagram illustrating another configuration of an optical path reversing element in a photographic optical system according to the present disclosure is shown.

[0048] Figure 32 A schematic diagram illustrating one configuration of the two optical path reversing elements disclosed herein in a photographic optical system is shown.

[0049] [Symbol Explanation]

[0050] 1,2,3,4,5,6,7,8,9,10,100,100a,100b,100c,100d,100e,100f,100g,100h,100i,100j,100k,100m,100n,100p,100q,100r: imaging device

[0051] 101: Imaging Lens

[0052] 102: Drive unit

[0053] 103: Electronic photosensitive element

[0054] 104: Image Stabilization Module

[0055] 200, 300, 400: Electronic devices

[0056] 201,401: Flash module

[0057] 202: Focusing Assist Module

[0058] 203: Image Signal Processor

[0059] 204, 304: Display module

[0060] 205: Image Software Processor

[0061] 206: Subject

[0062] OA1: First optical axis

[0063] OA2: Second optical axis

[0064] OA3: Third optical axis

[0065] LF, LF1, LF2: Optical path switching elements

[0066] LG: Lens Group

[0067] ST: Aperture

[0068] S1, S2: Aperture

[0069] E1: First lens

[0070] E2: Second lens

[0071] E3: Third Lens

[0072] E4: Fourth Lens

[0073] E5: Fifth Lens

[0074] E6: Sixth Lens

[0075] E7: Filter element

[0076] IMG: Imaging Surface

[0077] IS: Electronic photosensitive element

[0078] P: Inversion point

[0079] C: Critical point

[0080] SAG4R1: The displacement parallel to the optical axis from the point where the object-side surface of the fourth lens intersects the optical axis to the position of the maximum effective radius of the object-side surface of the fourth lens.

[0081] SAG4R2: The displacement parallel to the optical axis from the point where the image-side surface of the fourth lens intersects the optical axis to the position of the maximum effective radius of the image-side surface of the fourth lens.

[0082] SAG5R2: The displacement parallel to the optical axis from the point where the image-side surface of the fifth lens intersects the optical axis to the position of the maximum effective radius of the image-side surface of the fifth lens.

[0083] Y1R1: Maximum effective radius of the object-side surface of the first lens

[0084] Y6R2: Maximum effective radius of the image-side surface of the sixth lens Detailed Implementation

[0085] The photographic optical system comprises six lenses, which are arranged sequentially from the object side to the image side along the light path as a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens. Each of the six lenses has an object-side surface facing the object side and an image-side surface facing the image side.

[0086] The first lens may have positive refractive power; thereby, it can provide the main converging power of the photographic optical system to control the size of the lens. The image-side surface of the first lens may be convex near the optical axis; thereby, it helps to increase the angle of view and adjust the refractive power of the first lens.

[0087] The second lens can have negative refractive power; this can balance the spherical aberration and chromatic aberration produced by the first lens. The image-side surface of the second lens can be concave near the optical axis; this can adjust the direction of light travel and help increase the image height.

[0088] The third lens can have positive refractive power; this helps to share the converging power of the photographic optical system and reduce aberrations. The image-side surface of the third lens can be convex near the optical axis; this allows adjustment of the outgoing light direction, helping to reduce stray light.

[0089] The fourth lens can have positive refractive power; this helps to reduce volume and improve the light-gathering ability of the photographic optical system. The object-side surface of the fourth lens can be concave near the optical axis; this helps to control the beam size in the peripheral field of view and reduce the occurrence of vignetting and distortion at the periphery of the image.

[0090] The fifth lens can have negative refractive power; this helps reduce spherical aberration in the photographic optical system. The object-side surface of the fifth lens can be convex near the optical axis; this helps correct aberrations in the photographic optical system to maintain good image quality. The image-side surface of the fifth lens can be concave near the optical axis; this enhances the negative refractive power of the fifth lens and improves chromatic aberration in the photographic optical system.

[0091] The sixth lens can have positive refractive power; thereby, it can provide sufficient light-gathering capability at the image side of the photographic optical system. The image side surface of the sixth lens can be concave near the optical axis; thereby, it helps to shorten the overall length of the photographic optical system.

[0092] The image-side surface of the sixth lens may have at least one inflection point. This helps correct image curvature and distortion in the photographic optical system, while simultaneously reducing the overall length of the system. Please refer to... Figure 28 This is a schematic diagram illustrating the inflection point P on the lens surface according to the first embodiment of this disclosure. Figure 28 In the first lens E1, the second lens E2, the second lens E2, the fourth lens E4, and the fifth lens E5 each have one inflection point P, and the third lens E3, the third lens E3, the fourth lens E4, the fifth lens E5, the sixth lens E6, and the sixth lens E6 each have two inflection points P. Figure 28 The illustration of the first embodiment of this disclosure is provided as an example. However, in other embodiments of this disclosure, each lens may have one or more inversion points.

[0093] The image-side surface of the sixth lens may have at least one critical point off-axis. This helps control peripheral image aberrations and also facilitates size reduction. Please refer to... Figure 28, is a schematic diagram showing the critical point C on the lens surface according to the first embodiment of the present disclosure. In Figure 28 , on the object side surface of the first lens E1, the object side surface of the second lens E2, the image side surface of the third lens E3, the object side surface of the fifth lens E5, the image side surface of the fifth lens E5, the object side surface of the sixth lens E6, and the image side surface of the sixth lens E6, each has a critical point C at an off-axis position, and the object side surface of the third lens E3 has two critical points C at an off-axis position. Figure 28 is shown as an exemplary illustration of the first embodiment of the present disclosure. However, in other embodiments of the present disclosure, each lens may have one or more critical points at an off-axis position.

[0094] The radius of curvature of the object side surface of the first lens is R1, and the radius of curvature of the image side surface of the first lens is R2, which can satisfy the following condition: 0.00 < (R1 + R2) / (R1 - R2). Thereby, the surface shape and refractive power of the first lens can be adjusted, which helps to increase the viewing angle. Among them, the following condition can also be satisfied: 0.10 < (R1 + R2) / (R1 - R2). Among them, the following condition can also be satisfied: 0.20 < (R1 + R2) / (R1 - R2) < 2.00. Among them, the following condition can also be satisfied: 0.50 < (R1 + R2) / (R1 - R2) < 2.50. Among them, the following condition can also be satisfied: 0.45 < (R1 + R2) / (R1 - R2) < 1.70. Among them, the following condition can also be satisfied: 0.52 ≤ (R1 + R2) / (R1 - R2) ≤ 1.55.

[0095] The spacing distance on the optical axis between the second lens and the third lens is T23, and the spacing distance on the optical axis between the third lens and the fourth lens is T34, which can satisfy the following condition: 0.50 < T34 / T23 < 2.00. Thereby, it helps to adjust the lens distribution to reduce the assembly difficulty. Among them, the following condition can also be satisfied: 0.60 < T34 / T23 < 1.70. Among them, the following condition can also be satisfied: 0.70 < T34 / T23 < 1.60. Among them, the following condition can also be satisfied: 0.79 ≤ T34 / T23 ≤ 1.56.

[0096] The maximum imaging height of the photographic optical system (which can be half of the total diagonal length of the effective sensing area of the electronic photosensitive element) is ImgH, and the focal length of the photographic optical system is f, which can satisfy the following condition: 0.80 < ImgH / f < 1.20. Thereby, the photographic optical system can be adjusted to a better field angle, which is beneficial for applications in different fields. Among them, the following condition can also be satisfied: 0.90 < ImgH / f < 1.15.

[0097] The maximum viewing angle in the photographic optical system is FOV, which satisfies the following condition: 88.0 degrees < FOV < 103.0 degrees. Thereby, the photographic optical system can have an appropriate viewing angle to meet the market demand.

[0098] The photographic optical system disclosed in the present disclosure may further include an aperture. The distance from the aperture to the imaging surface on the optical axis is SL, and the focal length of the photographic optical system is f, which satisfies the following condition: 1.50 < SL / f < 2.00. Thereby, the distance from the aperture to the image plane can be adjusted, which helps to reduce the total length of the photographic optical system and increase the size of the viewing angle. Among them, the following condition can also be satisfied: 1.55 < SL / f < 1.85.

[0099] The focal length of the fifth lens is f5, and the focal length of the sixth lens is f6, which satisfies the following condition: 0.00 < |f5 / f6| < 1.00. Thereby, the refractive powers of the fifth lens and the sixth lens can be balanced, which helps to adjust the refractive power configuration at the image side end of the photographic optical system. Among them, the following condition can also be satisfied: 0.05 < |f5 / f6| < 0.90.

[0100] The distance from the object side surface of the first lens to the imaging surface on the optical axis is TL, and the radius of curvature of the image side surface of the third lens is R6, which satisfies the following condition: -2.00 < TL / R6 < 0.60. Thereby, the ratio of the total length of the photographic optical system to the image side surface of the third lens can be adjusted, which helps to adjust the refractive power of the third lens. Among them, the following condition can also be satisfied: -1.80 < TL / R6 < 0.50. Among them, the following condition can also be satisfied: -1.60 < TL / R6 < 0.40. Among them, the following condition can also be satisfied: -1.52 ≤ TL / R6 ≤ 0.37.

[0101] The displacement amount parallel to the optical axis from the intersection point of the image side surface of the fifth lens on the optical axis to the maximum effective radius position of the image side surface of the fifth lens is SAG5R2, and the thickness of the fifth lens on the optical axis is CT5, which satisfies the following condition: 0.00 < SAG5R2 / CT5 < 1.00. Thereby, the bending degree of the peripheral surface shape of the image side of the fifth lens can be controlled, which helps to improve the manufacturing qualification rate. Among them, the following condition can also be satisfied: 0.10 < SAG5R2 / CT5 < 0.80. Among them, the following condition can also be satisfied: 0.20 < SAG5R2 / CT5 < 0.60. Please refer to Figure 29 , which is a schematic diagram showing the parameter SAG5R2 according to the first embodiment of the present disclosure, wherein the displacement amount is positive in the image side direction and negative in the object side direction.

[0102] The distance from the object side surface of the first lens to the imaging surface on the optical axis is TL, and the radius of curvature of the object side surface of the first lens is R1, which can satisfy the following condition: -1.00 < TL / R1 < 1.30. Thereby, it is possible to avoid excessive bending of the object side surface of the first lens, which helps in lens forming. Among them, the following condition can also be satisfied: -0.80 < TL / R1 < 1.00. Among them, the following condition can also be satisfied: -0.70 < TL / R1 < 0.80. Among them, the following condition can also be satisfied: -0.61 ≤ TL / R1 ≤ 0.71.

[0103] The focal length of the photographic optical system is f, and the focal length of the sixth lens is f6, which can satisfy the following condition: -0.30 < f / f6. Thereby, it helps to provide sufficient ability to converge light rays at the image side end of the photographic optical system. Among them, the following condition can also be satisfied: -0.30 < f / f6 < 0.70. Among them, the following condition can also be satisfied: -0.20 < f / f6 < 0.60.

[0104] The focal length of the first lens is f1, and the focal length of the fourth lens is f4, which can satisfy the following condition: 0.20 < |f1 / f4| < 1.20. Thereby, the refractive power configuration in the photographic optical system can be balanced, which helps in reducing aberrations. Among them, the following condition can also be satisfied: 0.40 < |f1 / f4| < 1.00.

[0105] The focal length of the photographic optical system is f, the radius of curvature of the image side surface of the fifth lens is R10, and the radius of curvature of the image side surface of the sixth lens is R12, which can satisfy the following condition: 5.00 < f / R10 + f / R12 < 8.00. Thereby, it helps to adjust the light ray direction and improve the imaging quality. Among them, the following condition can also be satisfied: 5.50 < f / R10 + f / R12 < 7.50. Among them, the following condition can also be satisfied: 6.00 < f / R10 + f / R12 < 7.00.

[0106] The radius of curvature of the object side surface of the fourth lens is R7, and the radius of curvature of the object side surface of the fifth lens is R9, which can satisfy the following condition: 0.70 < |R7 / R9|. Thereby, it helps to adjust the light ray direction to reduce aberrations. Among them, the following condition can also be satisfied: 0.80 < |R7 / R9| < 2.50.

[0107] The distance between the first lens and the second lens on the optical axis is T12, the distance between the fourth lens and the fifth lens on the optical axis is T45, and the distance between the fifth lens and the sixth lens on the optical axis is T56, which can satisfy the following conditions: 0.00 < (T12 + T45) / T56 < 1.50. Thereby, the spatial distribution of the lenses can be balanced, which helps to compress the volume. Among them, the following conditions can also be satisfied: 0.00 < (T12 + T45) / T56 < 1.20. Among them, the following conditions can also be satisfied: 0.10 < (T12 + T45) / T56 < 1.10. Among them, the following conditions can also be satisfied: 0.20 ≤ (T12 + T45) / T56 ≤ 1.05.

[0108] The displacement parallel to the optical axis from the intersection point of the object-side surface of the fourth lens on the optical axis to the maximum effective radius position of the object-side surface of the fourth lens is SAG4R1, and the displacement parallel to the optical axis from the intersection point of the image-side surface of the fourth lens on the optical axis to the maximum effective radius position of the image-side surface of the fourth lens is SAG4R2, which can satisfy the following conditions: 0.00 < SAG4R2 / SAG4R1 < 3.50. Thereby, the curvature of the peripheral surface shape of the image side of the fourth lens can be adjusted, which helps to reduce off-axis aberration. Among them, the following conditions can also be satisfied: 1.00 < SAG4R2 / SAG4R1 < 2.50. Please refer to Figure 29 , which is a schematic diagram showing the parameters SAG4R1 and SAG4R2 according to the first embodiment of the present disclosure, wherein the value of the displacement is positive in the image side direction and negative in the object side direction.

[0109] The Abbe number of the fourth lens is V4, which can satisfy the following conditions: 40.0 < V4 < 80.0. Thereby, it helps to balance the converging ability between light rays of different bands to correct chromatic aberration. Among them, the following conditions can also be satisfied: 50.0 < V4 < 60.00.

[0110] The distance from the object-side surface of the first lens to the imaging surface on the optical axis is TL, and the maximum imaging height of the photographic optical system is ImgH, which can satisfy the following conditions: 1.30 < TL / ImgH < 2.00. Thereby, it helps to balance between compressing the total length of the photographic optical system and increasing the imaging surface. Among them, the following conditions can also be satisfied: 1.40 < TL / ImgH < 1.90.

[0111] The F-number of the photographic optical system is Fno, which can satisfy the following conditions: Fno < 2.10. Thereby, the aperture size can be adjusted, which helps to increase the light input of the photographic optical system to improve the illuminance of the peripheral field of view. Among them, the following conditions can also be satisfied: 1.30 < Fno < 2.00.

[0112] The focal length of the second lens is f2, and the focal length of the third lens is f3, which can satisfy the following conditions: 0.00 < |f2 / f3| < 1.10. Thereby, the refractive powers of the second lens and the third lens can be balanced, which helps to balance the convergence or divergence of light rays, so as to improve the light collection quality of the entire field of view. Among them, the following conditions can also be satisfied: 0.20 < |f2 / f3| < 1.00.

[0113] The radius of curvature of the object side surface of the first lens is R1, and the radius of curvature of the image side surface of the first lens is R2, which can satisfy the following conditions: -0.40 < R2 / R1 < 0.30. Thereby, the surface shape of the first lens can be controlled from being overly curved, so as to improve the imaging quality.

[0114] The thickness of the third lens on the optical axis is CT3, and the thickness of the fourth lens on the optical axis is CT4, which can satisfy the following conditions: 0.70 < CT3 / CT4 < 1.60. Thereby, the ratio of the central thicknesses of the third lens and the fourth lens can be adjusted, which helps to balance the refractive power distribution in the photographic optical system. Among them, the following conditions can also be satisfied: 0.80 < CT3 / CT4 < 1.50.

[0115] The maximum effective radius of the object side surface of the first lens is Y1R1, and the maximum effective radius of the image side surface of the sixth lens is Y6R2, which can satisfy the following conditions: 2.00 < Y6R2 / Y1R1 < 4.50. Thereby, the ratio of the effective diameter heights of the object side of the first lens and the image side of the sixth lens can be balanced, which helps to expand the viewing angle. Among them, the following conditions can also be satisfied: 2.50 < Y6R2 / Y1R1 < 4.00. Among them, the following conditions can also be satisfied: 2.95 ≤ Y6R2 / Y1R1 ≤ 3.55. Please refer to Figure 29 , which is a schematic diagram showing the parameters Y1R1 and Y6R2 according to the first embodiment of the present disclosure.

[0116] All the technical features in the photographic optical system disclosed in the present disclosure can be combined and configured to achieve the corresponding effects.

[0117] In the photographic optical system disclosed in the present disclosure, the material of the lens can be glass or plastic. If the material of the lens is glass, the freedom of refractive power configuration of the photographic optical system can be increased, and the influence of external environmental temperature changes on imaging can be reduced, and the glass lens can be made by techniques such as grinding or molding. If the lens material is plastic, the production cost can be effectively reduced. In addition, a spherical surface or an aspherical surface (ASP) can be provided on the lens surface. Among them, the spherical lens can reduce the manufacturing difficulty, and if an aspherical surface is provided on the lens surface, more control variables can be obtained thereby to reduce aberration, reduce the number of lenses, and effectively reduce the total length of the photographic optical system disclosed in the present disclosure. Further, the aspherical surface can be made by methods such as plastic injection molding or molding of glass lenses.

[0118] In the photographic optical system disclosed in this disclosure, if the lens surface is aspherical, it means that all or part of the optically effective area of ​​the lens surface is aspherical.

[0119] In the photographic optical system disclosed herein, additives can be selectively added to any (or more) lens materials to produce light absorption or interference effects, thereby altering the lens's transmittance for specific wavelengths of light and reducing stray light and color shift. For example, the additives may filter out light in the 600 nm to 800 nm wavelength range to help reduce excess red or infrared light; or they may filter out light in the 350 nm to 450 nm wavelength range to reduce excess blue or ultraviolet light. Therefore, the additives can prevent specific wavelengths of light from interfering with imaging. Furthermore, the additives can be uniformly mixed into plastic and manufactured into lenses using injection molding technology. Additionally, the additives can also be deposited on the lens surface as a coating to provide the aforementioned effects.

[0120] In the photographic optical system disclosed in this disclosure, if the lens surface is convex and the location of the convex surface is not defined, it means that the convex surface can be located near the optical axis of the lens surface; if the lens surface is concave and the location of the concave surface is not defined, it means that the concave surface can be located near the optical axis of the lens surface. If the radius of curvature, refractive power, or focal length of the lens is not defined in its region, it means that the radius of curvature, refractive power, or focal length of the lens can be the radius of curvature, refractive power, or focal length of the lens near the optical axis.

[0121] In the photographic optical system disclosed in this disclosure, the inflection point of the lens surface refers to the boundary point where the curvature of the lens surface changes from positive to negative. The critical point of the lens surface refers to the point of tangency on the tangent line between a plane perpendicular to the optical axis and the lens surface, and the critical point is not located on the optical axis.

[0122] In the photographic optical system disclosed herein, the imaging surface of the photographic optical system can be a plane or a curved surface with any curvature, depending on the corresponding electronic photosensitive element, especially a curved surface with a concave surface facing the object side.

[0123] In the photographic optical system disclosed herein, one or more imaging correction elements (such as planar elements) can be selectively disposed between the lens closest to the imaging plane and the imaging plane in the imaging optical path to achieve the effect of correcting image curvature (such as image distortion). The optical properties of the imaging correction element, such as curvature, thickness, refractive index, position, and surface type (convex or concave, spherical or aspherical, diffractive surface, and Fresnel surface, etc.), can be adjusted according to the requirements of the imaging device. Generally, a preferred configuration of the imaging correction element is to place a thin plano-concave element with a concave surface in the object-side direction close to the imaging plane.

[0124] In the photographic optical system disclosed herein, at least one element with a deflecting optical path function, such as a prism or a mirror, can be selectively disposed between the subject and the imaging surface in the imaging optical path. The prism surface or mirror surface can be a plane, spherical, aspherical, or freeform surface, providing greater spatial flexibility for the photographic optical system, allowing the thinner and lighter electronic device to be independent of the overall optical length of the photographic optical system. For further explanation, please refer to... Figure 30 and Figure 31 ,in Figure 30 This is a schematic diagram illustrating an arrangement of an optical path reversing element according to the present disclosure in a photographic optical system, and Figure 31 This is a schematic diagram illustrating another configuration of an optical path reversing element according to this disclosure in a photographic optical system. For example... Figure 30 and Figure 31 As shown, the photographic optical system can travel along the light path from the subject (not shown) to the imaging plane IMG, and sequentially includes a first optical axis OA1, a light path deflection element LF, and a second optical axis OA2, wherein the light path deflection element LF can be as follows: Figure 30 The image shown is positioned between the subject and the lens group LG of the photographic optical system, or as... Figure 31 The image shows the lens group LG positioned between the imaging plane IMG in the photographic optical system. Please also refer to... Figure 32 This is a schematic diagram illustrating an arrangement of two optical path reversing elements in a photographic optical system according to the present disclosure, such as... Figure 32 As shown, the photographic optical system can also follow the light path from the subject (not shown) to the imaging plane IMG, and sequentially includes a first optical axis OA1, a first optical path reversing element LF1, a second optical axis OA2, a second optical path reversing element LF2, and a third optical axis OA3. The first optical path reversing element LF1 is positioned between the subject and the lens group LG of the photographic optical system, and the second optical path reversing element LF2 is positioned between the lens group LG and the imaging plane IMG. Furthermore, the direction of light travel along the first optical axis OA1 can be as follows: Figure 32 The direction shown is the same as the direction of light travel along the third optical axis OA3. The photographic optical system may also selectively be configured with more than three optical path deflection elements; this disclosure is not limited to the type, number, and position of the optical path deflection elements shown in the accompanying drawings.

[0125] In the photographic optical system disclosed herein, at least one aperture stop may be provided, which may be located before the first lens, between the lenses, or after the last lens. The aperture stop may be of the type such as a glare stop or a field stop, and may be used to reduce stray light and help improve image quality.

[0126] In the photographic optical system disclosed in this invention, the aperture can be configured as a front aperture or a center aperture. A front aperture means the aperture is positioned between the subject and the first lens, while a center aperture means the aperture is positioned between the first lens and the imaging plane. A front aperture allows for a longer distance between the exit pupil and the imaging plane, creating a telecentric effect and increasing the efficiency of image reception by the CCD or CMOS sensor. A center aperture helps to widen the field of view of the photographic optical system.

[0127] This disclosure may appropriately incorporate a variable aperture element, which can be a mechanical component or a light-regulating element, capable of electrically or signal-controlled aperture size and shape. The mechanical component may include movable parts such as blade assemblies or shielding plates; the light-regulating element may include masking materials such as filter elements, electrochromic materials, or liquid crystal layers. The variable aperture element can enhance image adjustment capabilities by controlling the amount of light entering the image or the exposure time. Furthermore, the variable aperture element can also be the aperture of this disclosure, allowing adjustment of image quality, such as depth of field or exposure speed, by changing the aperture value.

[0128] This disclosure allows for the appropriate placement of one or more optical elements to restrict the form of light passing through a photographic optical system. These optical elements may be filters, polarizers, etc., but this disclosure is not limited thereto. Furthermore, the optical elements may be monolithic elements, composite components, or thin films, but this disclosure is not limited thereto. The optical elements may be placed between the object end, image end, or lenses of the photographic optical system to control the passage of specific forms of light, thereby meeting application requirements.

[0129] The photographic optical system disclosed herein may include at least one optical lens, optical element, or carrier, at least one surface of which has a low-reflection layer. This low-reflection layer effectively reduces stray light generated by reflection at the interface. The low-reflection layer may be disposed in a non-effective area of ​​the object-side or image-side surface of the optical lens, or on the connecting surface between the object-side and image-side surfaces. The optical element may be a light-shielding element, an annular spacer element, a lens barrel element, a cover glass, blue glass, a filter element (color filter), a light path deflection element (reflective element), a prism, or a mirror, etc. The carrier may be a lens mount, a microlens disposed on the photosensitive element, the periphery of the photosensitive element substrate, or a glass sheet used to protect the photosensitive element, etc.

[0130] In the photographic optical system disclosed herein, the object side and image side are determined according to the optical axis direction, and the data on the optical axis are calculated along the optical axis. Furthermore, if the optical axis is deflected by an optical path deflection element, the data on the optical axis are also calculated along the optical axis.

[0131] Based on the above implementation methods, specific embodiments are presented below and described in detail with reference to the accompanying drawings.

[0132] <First Embodiment>

[0133] Please refer to Figures 1 to 2 ,in Figure 1 A schematic diagram of an image-capturing device according to a first embodiment of this disclosure is shown, and Figure 2 From left to right, the graphs show the spherical aberration, astigmatism, and distortion curves of the first embodiment. Figure 1 It is known that the image capturing device 1 includes a photographic optical system (unlabeled) and an electronic image sensor IS. The photographic optical system, along the optical path from the object side to the image side, sequentially includes an aperture ST, a first lens E1, an aperture stop S1, a second lens E2, an aperture stop S2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter element E7, and an imaging surface IMG. The electronic image sensor IS is disposed on the imaging surface IMG. The photographic optical system includes six lenses (E1, E2, E3, E4, E5, E6), and there are no other interposed lenses between the lenses.

[0134] The first lens E1 has positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is convex near the optical axis. Both of its surfaces are aspherical. Its object-side surface has a point of inflection and its object-side surface has a critical point off-axis.

[0135] The second lens E2 has negative refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are aspherical. Its object-side surface has a point of inflection, its image-side surface has a point of inflection, and its object-side surface has a critical point off-axis.

[0136] The third lens E3 has positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are aspherical. Its object-side surface has two inflection points, its image-side surface has two inflection points, its object-side surface has two critical points off-axis, and its image-side surface has one critical point off-axis.

[0137] The fourth lens E4 has positive refractive power and is made of plastic. Its object-side surface is concave near the optical axis, and its image-side surface is convex near the optical axis. Both surfaces are aspherical. Its object-side surface has two inflection points, and its image-side surface has one inflection point.

[0138] The fifth lens E5 has negative refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both surfaces are aspherical. Its object-side surface has two inflection points, and its image-side surface has one inflection point. Its object-side surface has a critical point off-axis, and its image-side surface has a critical point off-axis.

[0139] The sixth lens E6 has negative refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both surfaces are aspherical. Its object-side surface has two inflection points, and its image-side surface has two inflection points. Its object-side surface has a critical point off-axis, and its image-side surface has a critical point off-axis.

[0140] The filter element E7 is made of glass and is located between the sixth lens E6 and the imaging surface IMG. It does not affect the focal length of the photographic optical system.

[0141] The equations for the aspherical surfaces of the above lenses are expressed as follows:

[0142]

[0143] X: The displacement parallel to the optical axis from the intersection of the aspherical surface and the optical axis to a point on the aspherical surface at a distance Y from the optical axis;

[0144] Y: The perpendicular distance between a point on the aspherical curve and the optical axis;

[0145] R: Radius of curvature;

[0146] k: cone coefficient; and

[0147] Ai: The i-th order aspherical coefficient.

[0148] In the photographic optical system of the first embodiment, the focal length of the photographic optical system is f, the aperture value of the photographic optical system is Fno, and half of the maximum angle of view of the photographic optical system is HFOV, with the following values: f = 3.15 mm, Fno = 1.80, and HFOV = 46.5 degrees.

[0149] The maximum field of view in a photographic optical system is FOV, which satisfies the following condition: FOV = 92.9 degrees.

[0150] The distance on the optical axis from the object-side surface of the first lens E1 to the imaging plane IMG is TL, and the maximum imaging height of the photographic optical system is ImgH, which satisfies the following condition: TL / ImgH=1.71.

[0151] The maximum imaging height of the photographic optical system is ImgH, and the focal length of the photographic optical system is f, which satisfies the following condition: ImgH / f=0.99.

[0152] The distance from the aperture ST to the imaging plane IMG on the optical axis is SL, and the focal length of the photographic optical system is f, which satisfies the following condition: SL / f = 1.71.

[0153] The distance from the object-side surface of the first lens E1 to the imaging plane IMG on the optical axis is TL, and the radius of curvature of the object-side surface of the first lens E1 is R1, which satisfies the following condition: TL / R1=0.52.

[0154] The distance from the object-side surface of the first lens E1 to the imaging plane IMG on the optical axis is TL, and the radius of curvature of the image-side surface of the third lens E3 is R6, which satisfies the following condition: TL / R6=0.12.

[0155] The focal length of the photographic optical system is f, and the focal length of the sixth lens E6 is f6, which satisfies the following condition: f / f6=-0.12.

[0156] The focal length of the first lens E1 is f1, and the focal length of the fourth lens E4 is f4. They satisfy the following condition: |f1 / f4|=0.71.

[0157] The focal length of the second lens E2 is f2, and the focal length of the third lens E3 is f3, which satisfies the following condition: |f2 / f3|=0.32.

[0158] The focal length of the fifth lens E5 is f5, and the focal length of the sixth lens E6 is f6. They satisfy the following condition: |f5 / f6|=0.30.

[0159] The focal length of the photographic optical system is f, the radius of curvature of the image-side surface of the fifth lens E5 is R10, and the radius of curvature of the image-side surface of the sixth lens E6 is R12. They satisfy the following condition: f / R10 + f / R12 = 6.28.

[0160] The radius of curvature of the object-side surface of the first lens E1 is R1, and the radius of curvature of the image-side surface of the first lens E1 is R2, which satisfies the following condition: (R1+R2) / (R1-R2)=0.70.

[0161] The radius of curvature of the object-side surface of the first lens E1 is R1, and the radius of curvature of the image-side surface of the first lens E1 is R2, which satisfies the following condition: R2 / R1=-0.17.

[0162] The radius of curvature of the object-side surface of the fourth lens E4 is R7, and the radius of curvature of the object-side surface of the fifth lens E5 is R9, which satisfies the following condition: |R7 / R9|=1.77.

[0163] The thickness of the third lens E3 on the optical axis is CT3, and the thickness of the fourth lens E4 on the optical axis is CT4, which satisfies the following condition: CT3 / CT4=1.03.

[0164] The optical axis spacing between the first lens E1 and the second lens E2 is T12, the optical axis spacing between the fourth lens E4 and the fifth lens E5 is T45, and the optical axis spacing between the fifth lens E5 and the sixth lens E6 is T56, satisfying the following condition: (T12 + T45) / T56 = 0.20. In this embodiment, the optical axis spacing between two adjacent lenses refers to the optical axis distance between two adjacent mirror surfaces of the two adjacent lenses.

[0165] The distance between the second lens E2 and the third lens E3 on the optical axis is T23, and the distance between the third lens E3 and the fourth lens E4 on the optical axis is T34, which satisfies the following condition: T34 / T23=1.00.

[0166] The Abbe number of the fourth lens E4 is V4, which satisfies the following condition: V4 = 56.0.

[0167] The displacement parallel to the optical axis from the intersection of the image-side surface of the fifth lens E5 with the optical axis to the position of the maximum effective radius of the image-side surface of the fifth lens E5 is SAG5R2. The thickness of the fifth lens E5 on the optical axis is CT5, which satisfies the following condition: SAG5R2 / CT5 = 0.41. In this embodiment, the direction of SAG5R2 points towards the image side, so the value is positive.

[0168] The displacement parallel to the optical axis from the intersection of the object-side surface of the fourth lens E4 with the optical axis to the position of the maximum effective radius of the object-side surface of the fourth lens E4 is SAG4R1, and the displacement parallel to the optical axis from the intersection of the image-side surface of the fourth lens E4 with the optical axis to the position of the maximum effective radius of the image-side surface of the fourth lens E4 is SAG4R2. These displacements satisfy the following condition: SAG4R2 / SAG4R1 = 1.96. In this embodiment, the direction of SAG4R1 points towards the object side, therefore its value is negative; the direction of SAG4R2 also points towards the object side, therefore its value is negative.

[0169] The maximum effective radius of the object-side surface of the first lens E1 is Y1R1, and the maximum effective radius of the image-side surface of the sixth lens E6 is Y6R2, which satisfies the following condition: Y6R2 / Y1R1=3.22.

[0170] Please refer to Table 1A and Table 1B below.

[0171]

[0172]

[0173]

[0174] Table 1A is... Figure 1 The first embodiment provides detailed structural data, where the units for radius of curvature, thickness, and focal length are millimeters (mm), and surfaces 0 to 18 sequentially represent the surfaces along the optical path from the object side to the image side. Table 1B shows the aspherical data in the first embodiment, where k is the conic coefficient in the aspherical curve equation, and A4 to A24 represent the 4th to 24th order aspherical coefficients of each surface. Furthermore, the tables for the following embodiments are corresponding schematic diagrams and aberration curves for each embodiment. The definitions of the data in the tables are the same as those in Tables 1A and 1B of the first embodiment, and will not be repeated here.

[0175] <Second Embodiment>

[0176] Please refer to Figures 3 to 4 ,in Figure 3 A schematic diagram of an image-capturing device according to a second embodiment of this disclosure is shown, and Figure 4 From left to right, the graphs show the spherical aberration, astigmatism, and distortion curves of the second embodiment. Figure 3 It is known that the image capturing device 2 includes a photographic optical system (unlabeled) and an electronic image sensor IS. The photographic optical system, along the optical path from the object side to the image side, sequentially includes an aperture ST, a first lens E1, an aperture stop S1, a second lens E2, an aperture stop S2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter element E7, and an imaging surface IMG. The electronic image sensor IS is disposed on the imaging surface IMG. The photographic optical system includes six lenses (E1, E2, E3, E4, E5, E6), and there are no other interposed lenses between the lenses.

[0177] The first lens E1 has positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is convex near the optical axis. Both of its surfaces are aspherical. Its object-side surface has a point of inflection and its object-side surface has a critical point off-axis.

[0178] The second lens E2 has negative refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are aspherical. Its object-side surface has one inflection point, and its image-side surface has three inflection points.

[0179] The third lens E3 has positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is convex near the optical axis. Both of its surfaces are aspherical. Its object-side surface has two inflection points, and its object-side surface has a critical point off-axis.

[0180] The fourth lens E4 has positive refractive power and is made of plastic. Its object-side surface is concave near the optical axis, and its image-side surface is convex near the optical axis. Both surfaces are aspherical. Its object-side surface has two inflection points, and its image-side surface has one inflection point.

[0181] The fifth lens E5 has negative refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are aspherical. Its object-side surface has a point of inflection, its image-side surface has a point of inflection, its object-side surface has a critical point off-axis, and its image-side surface has a critical point off-axis.

[0182] The sixth lens E6 has positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both surfaces are aspherical. Its object-side surface has two inflection points, and its image-side surface has one inflection point. Its object-side surface has a critical point off-axis, and its image-side surface has a critical point off-axis.

[0183] The filter element E7 is made of glass and is located between the sixth lens E6 and the imaging surface IMG. It does not affect the focal length of the photographic optical system.

[0184] Please refer to Table 2A and Table 2B below.

[0185]

[0186]

[0187] In the second embodiment, the equation for the aspherical curve is expressed as in the first embodiment. Furthermore, the definitions in Table 2C below are the same as in the first embodiment and will not be repeated here.

[0188]

[0189] <Third Embodiment>

[0190] Please refer to Figures 5 to 6 ,in Figure 5 A schematic diagram of an image-capturing device according to a third embodiment of this disclosure is shown, and Figure 6 From left to right, the graphs show the spherical aberration, astigmatism, and distortion curves of the third embodiment. Figure 5It is known that the image capturing device 3 includes a photographic optical system (unlabeled) and an electronic image sensor IS. The photographic optical system, along the optical path from the object side to the image side, sequentially includes an aperture ST, a first lens E1, an aperture stop S1, a second lens E2, an aperture stop S2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter element E7, and an imaging surface IMG. The electronic image sensor IS is disposed on the imaging surface IMG. The photographic optical system includes six lenses (E1, E2, E3, E4, E5, E6), and there are no other interposed lenses between the lenses.

[0191] The first lens E1 has positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is convex near the optical axis. Both of its surfaces are aspherical. Its object-side surface has a point of inflection and its object-side surface has a critical point off-axis.

[0192] The second lens E2 has negative refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are aspherical. Its object-side surface has a point of inflection, its image-side surface has a point of inflection, and its object-side surface has a critical point off-axis.

[0193] The third lens E3 has positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are aspherical. Its object-side surface has two inflection points, its image-side surface has two inflection points, its object-side surface has two critical points off-axis, and its image-side surface has one critical point off-axis.

[0194] The fourth lens E4 has positive refractive power and is made of plastic. Its object-side surface is concave near the optical axis, and its image-side surface is convex near the optical axis. Both surfaces are aspherical. Its object-side surface has two inflection points, its image-side surface has one inflection point, and its image-side surface has a critical point off-axis.

[0195] The fifth lens E5 has negative refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both surfaces are aspherical. Its object-side surface has two inflection points, and its image-side surface has two inflection points. Its object-side surface has a critical point off-axis, and its image-side surface has a critical point off-axis.

[0196] The sixth lens E6 has positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both surfaces are aspherical. Its object-side surface has two inflection points, its image-side surface has two inflection points, its object-side surface has two critical points off-axis, and its image-side surface has one critical point off-axis.

[0197] The filter element E7 is made of glass and is located between the sixth lens E6 and the imaging surface IMG. It does not affect the focal length of the photographic optical system.

[0198] Please refer to Table 3A and Table 3B below.

[0199]

[0200]

[0201]

[0202]

[0203] In the third embodiment, the equation for the aspherical curve is expressed as in the first embodiment. Furthermore, the definitions described in Table 3C below are the same as in the first embodiment and will not be repeated here.

[0204]

[0205] <Fourth Embodiment>

[0206] Please refer to Figures 7 to 8 ,in Figure 7 A schematic diagram of an image-capturing device according to the fourth embodiment of this disclosure is shown, and Figure 8 From left to right, the graphs show the spherical aberration, astigmatism, and distortion curves of the fourth embodiment. Figure 7 It is known that the image capturing device 4 includes a photographic optical system (unlabeled) and an electronic image sensor IS. The photographic optical system, along the optical path from the object side to the image side, sequentially includes an aperture ST, a first lens E1, an aperture stop S1, a second lens E2, an aperture stop S2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter element E7, and an imaging surface IMG. The electronic image sensor IS is disposed on the imaging surface IMG. The photographic optical system includes six lenses (E1, E2, E3, E4, E5, E6), and there are no other interposed lenses between the lenses.

[0207] The first lens E1 has positive refractive power and is made of plastic. Its object-side surface is concave near the optical axis, and its image-side surface is convex near the optical axis. Both of its surfaces are aspherical.

[0208] The second lens E2 has negative refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both surfaces are aspherical, and its object-side surface has a point of inflection.

[0209] The third lens E3 has positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is convex near the optical axis. Both of its surfaces are aspherical. Its object-side surface has two inflection points, and its object-side surface has a critical point off-axis.

[0210] The fourth lens E4 has positive refractive power and is made of plastic. Its object-side surface is concave near the optical axis, and its image-side surface is convex near the optical axis. Both surfaces are aspherical. Its object-side surface has two inflection points, and its image-side surface has one inflection point.

[0211] The fifth lens E5 has negative refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are aspherical. Its object-side surface has a point of inflection, its image-side surface has a point of inflection, its object-side surface has a critical point off-axis, and its image-side surface has a critical point off-axis.

[0212] The sixth lens E6 has positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both surfaces are aspherical. Its object-side surface has two inflection points, and its image-side surface has one inflection point. Its object-side surface has a critical point off-axis, and its image-side surface has a critical point off-axis.

[0213] The filter element E7 is made of glass and is located between the sixth lens E6 and the imaging surface IMG. It does not affect the focal length of the photographic optical system.

[0214] Please refer to Table 4A and Table 4B below.

[0215]

[0216]

[0217]

[0218]

[0219] In the fourth embodiment, the equation for the aspherical curve is expressed as in the first embodiment. Furthermore, the definitions described in Table 4C below are the same as in the first embodiment and will not be repeated here.

[0220]

[0221]

[0222] <Fifth Embodiment>

[0223] Please refer to Figures 9 to 10 ,in Figure 9 A schematic diagram of an image-capturing device according to the fifth embodiment of this disclosure is shown, and Figure 10 From left to right, the graphs show the spherical aberration, astigmatism, and distortion curves of the fifth embodiment. Figure 9 It is known that the image capturing device 5 includes a photographic optical system (unlabeled) and an electronic image sensor IS. The photographic optical system, along the optical path from the object side to the image side, sequentially includes an aperture ST, a first lens E1, an aperture stop S1, a second lens E2, an aperture stop S2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter element E7, and an imaging surface IMG. The electronic image sensor IS is disposed on the imaging surface IMG. The photographic optical system includes six lenses (E1, E2, E3, E4, E5, E6), and there are no other interposed lenses between the lenses.

[0224] The first lens E1 has positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is convex near the optical axis. Both of its surfaces are aspherical. Its object-side surface has a point of inflection and its object-side surface has a critical point off-axis.

[0225] The second lens E2 has negative refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both surfaces are aspherical. Its object-side surface has one inflection point, its image-side surface has two inflection points, and its object-side surface has a critical point off-axis.

[0226] The third lens E3 has positive refractive power and is made of plastic. Its object-side surface is concave near the optical axis, and its image-side surface is convex near the optical axis. Both of its surfaces are aspherical. Its object-side surface has a point of inflection, and its image-side surface also has a point of inflection.

[0227] The fourth lens E4 has positive refractive power and is made of plastic. Its object-side surface is concave near the optical axis, and its image-side surface is convex near the optical axis. Both of its surfaces are aspherical. Its object-side surface has a point of inflection, its image-side surface has a point of inflection, and its image-side surface has a critical point off-axis.

[0228] The fifth lens E5 has negative refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are aspherical. Its object-side surface has a point of inflection, its image-side surface has a point of inflection, its object-side surface has a critical point off-axis, and its image-side surface has a critical point off-axis.

[0229] The sixth lens E6 has positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both surfaces are aspherical. Its object-side surface has two inflection points, and its image-side surface has one inflection point. Its object-side surface has two critical points off-axis, and its image-side surface has one critical point off-axis.

[0230] The filter element E7 is made of glass and is located between the sixth lens E6 and the imaging surface IMG. It does not affect the focal length of the photographic optical system.

[0231] Please refer to Table 5A and Table 5B below.

[0232]

[0233]

[0234]

[0235] In the fifth embodiment, the equation for the aspherical curve is expressed as in the first embodiment. Furthermore, the definitions described in Table 5C below are the same as in the first embodiment and will not be repeated here.

[0236]

[0237] <Sixth Embodiment>

[0238] Please refer to Figures 11 to 12 ,in Figure 11 A schematic diagram of an image-capturing device according to the sixth embodiment of this disclosure is shown, and Figure 12 From left to right, the graphs show the spherical aberration, astigmatism, and distortion curves of the sixth embodiment. Figure 11 It is known that the image capturing device 6 includes a photographic optical system (unlabeled) and an electronic image sensor IS. The photographic optical system, along the optical path from the object side to the image side, sequentially includes an aperture ST, a first lens E1, an aperture stop S1, a second lens E2, an aperture stop S2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter element E7, and an imaging surface IMG. The electronic image sensor IS is disposed on the imaging surface IMG. The photographic optical system includes six lenses (E1, E2, E3, E4, E5, E6), and there are no other interposed lenses between the lenses.

[0239] The first lens E1 has positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is convex near the optical axis. Both of its surfaces are aspherical. Its object-side surface has a point of inflection and its object-side surface has a critical point off-axis.

[0240] The second lens E2 has negative refractive power and is made of plastic. Its object-side surface is concave near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are aspherical, and its image-side surface has a point of inflection.

[0241] The third lens E3 has positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are aspherical. Its object-side surface has two inflection points, and its image-side surface has one inflection point. Its object-side surface has two critical points off-axis, and its image-side surface has one critical point off-axis.

[0242] The fourth lens E4 has positive refractive power and is made of plastic. Its object-side surface is concave near the optical axis, and its image-side surface is convex near the optical axis. Both surfaces are aspherical, and its image-side surface has a point of inflection.

[0243] The fifth lens E5 has negative refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both surfaces are aspherical. Its object-side surface has two inflection points, and its image-side surface has one inflection point. Its object-side surface has a critical point off-axis, and its image-side surface has a critical point off-axis.

[0244] The sixth lens E6 has positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both surfaces are aspherical. Its object-side surface has four inflection points, and its image-side surface has two inflection points. Its object-side surface has a critical point off-axis, and its image-side surface has a critical point off-axis.

[0245] The filter element E7 is made of glass and is located between the sixth lens E6 and the imaging surface IMG. It does not affect the focal length of the photographic optical system.

[0246] Please refer to Table 6A and Table 6B below.

[0247]

[0248]

[0249]

[0250]

[0251] In the sixth embodiment, the equation for the aspherical curve is expressed as in the first embodiment. Furthermore, the definitions in Table 6C below are the same as in the first embodiment and will not be repeated here.

[0252]

[0253] <Seventh Embodiment>

[0254] Please refer to Figures 13 to 14 ,in Figure 13 A schematic diagram of an image-capturing device according to the seventh embodiment of this disclosure is shown, and Figure 14 From left to right, the graphs show the spherical aberration, astigmatism, and distortion curves of the seventh embodiment. Figure 13 It is known that the image capturing device 7 includes a photographic optical system (unlabeled) and an electronic image sensor IS. The photographic optical system, along the optical path from the object side to the image side, sequentially includes an aperture ST, a first lens E1, an aperture stop S1, a second lens E2, an aperture stop S2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter element E7, and an imaging surface IMG. The electronic image sensor IS is disposed on the imaging surface IMG. The photographic optical system includes six lenses (E1, E2, E3, E4, E5, E6), and there are no other interposed lenses between the lenses.

[0255] The first lens E1 has positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is convex near the optical axis. Both of its surfaces are aspherical. Its object-side surface has a point of inflection and its object-side surface has a critical point off-axis.

[0256] The second lens E2 has negative refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both surfaces are aspherical, and its object-side surface has a point of inflection.

[0257] The third lens E3 has positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is convex near the optical axis. Both of its surfaces are aspherical. Its object-side surface has two inflection points, its image-side surface has one inflection point, and its object-side surface has a critical point off-axis.

[0258] The fourth lens E4 has positive refractive power and is made of plastic. Its object-side surface is concave near the optical axis, and its image-side surface is convex near the optical axis. Both surfaces are aspherical. Its object-side surface has two inflection points, and its image-side surface has one inflection point.

[0259] The fifth lens E5 has negative refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both surfaces are aspherical. Its object-side surface has two inflection points, and its image-side surface has one inflection point. Its object-side surface has a critical point off-axis, and its image-side surface has a critical point off-axis.

[0260] The sixth lens E6 has positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both surfaces are aspherical. Its object-side surface has two inflection points, and its image-side surface has one inflection point. Its object-side surface has a critical point off-axis, and its image-side surface has a critical point off-axis.

[0261] The filter element E7 is made of glass and is located between the sixth lens E6 and the imaging surface IMG. It does not affect the focal length of the photographic optical system.

[0262] Please refer to Table 7A and Table 7B below.

[0263]

[0264]

[0265]

[0266]

[0267] In the seventh embodiment, the equation for the aspherical curve is expressed as in the first embodiment. Furthermore, the definitions in Table 7C below are the same as in the first embodiment and will not be repeated here.

[0268]

[0269] <Eighth Embodiment>

[0270] Please refer to Figures 15 to 16 ,in Figure 15 A schematic diagram of an image-capturing device according to the eighth embodiment of this disclosure is shown, and Figure 16 From left to right, the graphs show the spherical aberration, astigmatism, and distortion curves of the eighth embodiment. Figure 15 It is known that the image capturing device 8 includes a photographic optical system (unlabeled) and an electronic image sensor IS. The photographic optical system, along the optical path from the object side to the image side, sequentially includes an aperture ST, a first lens E1, an aperture stop S1, a second lens E2, an aperture stop S2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter element E7, and an imaging surface IMG. The electronic image sensor IS is disposed on the imaging surface IMG. The photographic optical system includes six lenses (E1, E2, E3, E4, E5, E6), and there are no other interposed lenses between the lenses.

[0271] The first lens E1 has positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is convex near the optical axis. Both of its surfaces are aspherical. Its object-side surface has a point of inflection and its object-side surface has a critical point off-axis.

[0272] The second lens E2 has negative refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are aspherical. Its object-side surface has a point of inflection, its image-side surface has a point of inflection, and its object-side surface has a critical point off-axis.

[0273] The third lens E3 has positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is convex near the optical axis. Both surfaces are aspherical, and its object-side surface has two inflection points.

[0274] The fourth lens E4 has positive refractive power and is made of plastic. Its object-side surface is concave near the optical axis, and its image-side surface is convex near the optical axis. Both surfaces are aspherical, and its image-side surface has a point of inflection.

[0275] The fifth lens E5 has negative refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both surfaces are aspherical. Its object-side surface has two inflection points, and its image-side surface has one inflection point. Its object-side surface has a critical point off-axis, and its image-side surface has a critical point off-axis.

[0276] The sixth lens E6 has positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are aspherical. Its object-side surface has four inflection points, and its image-side surface has one inflection point. Its object-side surface has a critical point off-axis, and its image-side surface has a critical point off-axis.

[0277] The filter element E7 is made of glass and is located between the sixth lens E6 and the imaging surface IMG. It does not affect the focal length of the photographic optical system.

[0278] Please refer to Table 8A and Table 8B below.

[0279]

[0280]

[0281]

[0282] In the eighth embodiment, the equation for the aspherical curve is expressed as in the first embodiment. Furthermore, the definitions in Table 8C below are the same as in the first embodiment and will not be repeated here.

[0283]

[0284] <Ninth Embodiment>

[0285] Please refer to Figures 17 to 18 ,in Figure 17 A schematic diagram of an image-capturing device according to the ninth embodiment of this disclosure is shown, and Figure 18 From left to right, the graphs show the spherical aberration, astigmatism, and distortion curves of the ninth embodiment. Figure 17 It is known that the image capturing device 9 includes a photographic optical system (unlabeled) and an electronic image sensor IS. The photographic optical system, along the optical path from the object side to the image side, sequentially includes an aperture ST, a first lens E1, an aperture stop S1, a second lens E2, an aperture stop S2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter element E7, and an imaging surface IMG. The electronic image sensor IS is disposed on the imaging surface IMG. The photographic optical system includes six lenses (E1, E2, E3, E4, E5, E6), and there are no other interposed lenses between the lenses.

[0286] The first lens E1 has positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is convex near the optical axis. Both of its surfaces are aspherical. Its object-side surface has a point of inflection and its object-side surface has a critical point off-axis.

[0287] The second lens E2 has negative refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both surfaces are aspherical, and its object-side surface has a point of inflection.

[0288] The third lens E3 has positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is convex near the optical axis. Both of its surfaces are aspherical. Its object-side surface has two inflection points, and its object-side surface has a critical point off-axis.

[0289] The fourth lens E4 has positive refractive power and is made of plastic. Its object-side surface is concave near the optical axis, and its image-side surface is convex near the optical axis. Both of its surfaces are aspherical. Its object-side surface has a recurve point, and its image-side surface also has a recurve point.

[0290] The fifth lens E5 has negative refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are aspherical. Its object-side surface has a point of inflection, its image-side surface has a point of inflection, its object-side surface has a critical point off-axis, and its image-side surface has a critical point off-axis.

[0291] The sixth lens E6 has positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both surfaces are aspherical. Its object-side surface has two inflection points, and its image-side surface has one inflection point. Its object-side surface has two critical points off-axis, and its image-side surface has one critical point off-axis.

[0292] The filter element E7 is made of glass and is located between the sixth lens E6 and the imaging surface IMG. It does not affect the focal length of the photographic optical system.

[0293] Please refer to Table 9A and Table 9B below.

[0294]

[0295]

[0296]

[0297]

[0298] In the ninth embodiment, the equation for the aspherical curve is expressed as in the first embodiment. Furthermore, the definitions in Table 9C below are the same as in the first embodiment and will not be repeated here.

[0299]

[0300] <Tenth Embodiment>

[0301] Please refer to Figures 19 to 20 ,in Figure 19 A schematic diagram of an image-capturing device according to the tenth embodiment of this disclosure is shown, and Figure 20 From left to right, the graphs show the spherical aberration, astigmatism, and distortion curves of the tenth embodiment. Figure 19 It is known that the image capturing device 10 includes a photographic optical system (unspecified) and an electronic image sensor IS. The photographic optical system, along the optical path from the object side to the image side, sequentially includes an aperture ST, a first lens E1, an aperture stop S1, a second lens E2, an aperture stop S2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter element E7, and an imaging surface IMG. The electronic image sensor IS is disposed on the imaging surface IMG. The photographic optical system includes six lenses (E1, E2, E3, E4, E5, E6), and there are no other interposed lenses between the lenses.

[0302] The first lens E1 has positive refractive power and is made of plastic. Its object-side surface is concave near the optical axis, and its image-side surface is convex near the optical axis. Both of its surfaces are aspherical.

[0303] The second lens E2 has negative refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are aspherical. Its object-side surface has one inflection point, its image-side surface has three inflection points, and its object-side surface has a critical point off-axis.

[0304] The third lens E3 has positive refractive power and is made of glass. Its object-side surface is concave near the optical axis, and its image-side surface is convex near the optical axis. Both of its surfaces are aspherical. Its object-side surface has a point of inflection, and its image-side surface also has a point of inflection.

[0305] The fourth lens E4 has positive refractive power and is made of plastic. Its object-side surface is concave near the optical axis, and its image-side surface is convex near the optical axis. Both of its surfaces are aspherical. Its object-side surface has a point of inflection, its image-side surface has a point of inflection, and its image-side surface has a critical point off-axis.

[0306] The fifth lens E5 has negative refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are aspherical. Its object-side surface has a point of inflection, its image-side surface has a point of inflection, its object-side surface has a critical point off-axis, and its image-side surface has a critical point off-axis.

[0307] The sixth lens E6 has positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both surfaces are aspherical. Its object-side surface has two inflection points, and its image-side surface has one inflection point. Its object-side surface has two critical points off-axis, and its image-side surface has one critical point off-axis.

[0308] The filter element E7 is made of glass and is located between the sixth lens E6 and the imaging surface IMG. It does not affect the focal length of the photographic optical system.

[0309] Please refer to Table 10A and Table 10B below.

[0310]

[0311]

[0312]

[0313]

[0314] In the tenth embodiment, the equation for the aspherical curve is expressed as in the first embodiment. Furthermore, the definitions described in Table 10C below are the same as in the first embodiment and will not be repeated here.

[0315]

[0316]

[0317] <Eleventh Embodiment>

[0318] Please refer to Figure 21 This is a perspective view illustrating an image-capturing device according to the eleventh embodiment of this disclosure. In this embodiment, the image-capturing device 100 is a camera module. The image-capturing device 100 includes an imaging lens 101, a driving device 102, an electronic photosensitive element 103, and an image stabilization module 104. The imaging lens 101 includes the photographic optical system of the first embodiment described above, a lens barrel (not otherwise labeled) for supporting the photographic optical system, and a support device (Holder Member, not otherwise labeled). The imaging lens 101 can also be configured with the photographic optical system of other embodiments described above, and this disclosure is not limited thereto. The image-capturing device 100 uses the imaging lens 101 to focus light to generate an image, and cooperates with the driving device 102 to focus the image, finally imaging it on the electronic photosensitive element 103 and outputting it as image data.

[0319] The driving device 102 may have an auto-focus function, and its driving method can use a driving system such as a voice coil motor (VCM), microelectromechanical systems (MEMS), piezoelectric systems, and shape memory alloys. The driving device 102 enables the imaging lens 101 to achieve a better imaging position, allowing clear images to be captured of the subject at different object distances. In addition, the image capturing device 100 is equipped with a high-sensitivity and low-noise electronic image sensor 103 (such as CMOS or CCD) located on the imaging surface of the photographic optical system, which can truly present the good image quality of the photographic optical system.

[0320] The image stabilization module 104 may be, for example, an accelerometer, a gyroscope, or a Hall effect sensor. The drive unit 102 may work in conjunction with the image stabilization module 104 to form an optical image stabilization (OIS) device. By adjusting the changes in different axes of the imaging lens 101, it can compensate for the blurry image caused by shaking during shooting, or use image compensation technology in the imaging software to provide electronic image stabilization (EIS), further improving the image quality of shooting in dynamic and low-light scenes.

[0321] <Twelfth Embodiment>

[0322] Please refer to Figures 22 to 24 ,in Figure 22 A perspective view of one side of an electronic device according to the twelfth embodiment of this disclosure is shown. Figure 23 Draw Figure 22 A three-dimensional diagram of the other side of the electronic device, and Figure 24 Draw Figure 22 System block diagram of an electronic device.

[0323] In this embodiment, the electronic device 200 is a smartphone. The electronic device 200 includes, according to the eleventh embodiment, image capturing devices 100a, 100b, 100c, 100d, and 100e, a flash module 201, a focus assist module 202, an image signal processor 203, a display module 204, and an image software processor 205. Image capturing devices 100, 100a, and 100b are all located on the same side of the electronic device 200 and are all single-focus. The focus assist module 202 may employ a laser rangefinder or a Time-of-Flight (ToF) module, but this disclosure is not limited thereto. Image capturing devices 100c, 100d, 100e, and display module 204 are all disposed on the other side of electronic device 200, and display module 204 can serve as a user interface, enabling image capturing devices 100c, 100d, and 100e to function as front-facing lenses for selfies, but this disclosure is not limited thereto. Furthermore, image capturing devices 100a, 100b, 100c, 100d, and 100e can all include the photographic optical system disclosed herein and can all have a structural configuration similar to that of image capturing device 100. Specifically, each of image capturing devices 100a, 100b, 100c, 100d, and 100e can include an imaging lens, a driving device, an electronic photosensitive element, and an image stabilization module, and each can include an optical path deflection element to deflect the optical path. The imaging lenses of imaging devices 100a, 100b, 100c, 100d, and 100e may each include, for example, the photographic optical system disclosed herein, a lens barrel for supporting the photographic optical system, and a support device.

[0324] Image capturing device 100 is a wide-angle image capturing device, image capturing device 100a is a telephoto image capturing device with optical path reversal, image capturing device 100b is an ultra-wide-angle image capturing device, image capturing device 100c is a wide-angle image capturing device, image capturing device 100d is an ultra-wide-angle image capturing device, and image capturing device 100e is a time-of-flight ranging image capturing device. In this embodiment, image capturing devices 100, 100a, and 100b have different viewing angles, allowing the electronic device 200 to provide different magnifications to achieve optical zoom shooting effects. Additionally, image capturing device 100e can acquire depth information of the image. The optical path reversal configuration of image capturing device 100a can, for example, have a similar... Figures 30 to 32 The structure can be referred to the aforementioned corresponding structure. Figures 30 to 32 The explanation will not be repeated here. Furthermore, the image capturing devices 100, 100b, 100c, 100d, and 100e may also have an optical path reversal configuration, and may also have, for example, similar... Figures 30 to 32 The structure can be referred to the aforementioned corresponding structure. Figures 30 to 32 The above-described electronic device 200 is exemplified by including multiple image capturing devices 100, 100a, 100b, 100c, 100d, and 100e, but the number and configuration of the image capturing devices are not intended to limit this disclosure.

[0325] When the user photographs the subject 206, the electronic device 200 uses the image capturing device 100, image capturing device 100a, or image capturing device 100b to capture the image, activates the flash module 201 for supplemental lighting, and uses the subject distance information of the subject 206 provided by the focus assist module 202 for fast focusing. Furthermore, the image signal processor 203 performs image optimization processing to further improve the image quality produced by the photographic optical system. The focus assist module 202 can use an infrared or laser focus assist system to achieve fast focusing. Alternatively, the electronic device 200 can also use the image capturing device 100c, image capturing device 100d, or image capturing device 100e for shooting. The display module 204 can use a touch screen, combined with the diverse functions of the image software processor 205 for image capturing and image processing (or can use a physical shooting button). The image processed by the image software processor 205 can be displayed on the display module 204.

[0326] <Thirteenth Embodiment>

[0327] Please refer to Figure 25 and Figure 26 ,in Figure 25 A schematic diagram showing one side of an electronic device according to the thirteenth embodiment of this disclosure is provided. Figure 26 Draw Figure 25 A schematic diagram of the other side of the electronic device.

[0328] In this embodiment, the electronic device 300 is a smartphone. The electronic device 300 includes, according to the eleventh embodiment, image capturing devices 100, 100f, 100g, and 100h, and a display module 304. Figure 25 As shown, image capturing devices 100, 100f, and 100g are all located on the same side of the electronic device 300 and are all single-focus. Figure 26 As shown, the image capturing device 100h and the display module 304 are both located on the other side of the electronic device 300. The image capturing device 100h can serve as a front-facing lens to provide a selfie function, but this disclosure is not limited thereto. Furthermore, the image capturing devices 100f, 100g, and 100h can all include the photographic optical system disclosed herein and can all have a structural configuration similar to that of the image capturing device 100. In detail, each of the image capturing devices 100f, 100g, and 100h can include an imaging lens, a driving device, an electronic photosensitive element, and an image stabilization module. The imaging lenses of the image capturing devices 100f, 100g, and 100h can each include, for example, the photographic optical system disclosed herein, a lens barrel for supporting the photographic optical system, and a support device.

[0329] Image capturing device 100 is a wide-angle image capturing device, image capturing device 100f is a telephoto image capturing device, image capturing device 100g is an ultra-wide-angle image capturing device, and image capturing device 100h is a wide-angle image capturing device. In this embodiment, image capturing devices 100, 100f, and 100g have different viewing angles, allowing the electronic device 300 to provide different magnifications to achieve optical zoom shooting effects. The above-described electronic device 300 is exemplified by including multiple image capturing devices 100, 100f, 100g, and 100h, but the number and configuration of the image capturing devices are not intended to limit this disclosure.

[0330] <Fourteenth Embodiment>

[0331] Please refer to Figure 27 This is a perspective view illustrating one side of an electronic device according to the fourteenth embodiment of this disclosure.

[0332] In this embodiment, the electronic device 400 is a smartphone. The electronic device 400 includes, according to the eleventh embodiment, image capturing devices 100i, 100j, 100k, 100m, 100n, 100p, 100q, and 100r, a flash module 401, a focus assist module, an image signal processor, a display module, and an image software processor (not shown). Image capturing devices 100i, 100j, 100k, 100m, 100n, 100p, 100q, and 100r are all disposed on the same side of the electronic device 400, while the display module is disposed on the other side of the electronic device 400. Furthermore, the imaging devices 100i, 100j, 100k, 100m, 100n, 100p, 100q, and 100r may all include the photographic optical system disclosed herein and may all have a structural configuration similar to that of the imaging device 100, which will not be elaborated further here.

[0333] Image capturing device 100 is a wide-angle image capturing device; image capturing device 100i is a telephoto image capturing device with a reversible optical path; image capturing device 100j is a telephoto image capturing device with a reversible optical path; image capturing device 100k is a wide-angle image capturing device; image capturing device 100m is an ultra-wide-angle image capturing device; image capturing device 100n is an ultra-wide-angle image capturing device; image capturing device 100p is a telephoto image capturing device; image capturing device 100q is a telephoto image capturing device; and image capturing device 100r is a time-of-flight ranging image capturing device. In this embodiment, image capturing devices 100, 100i, 100j, 100k, 100m, 100n, 100p, and 100q have different viewing angles, allowing the electronic device 400 to provide different magnification ratios to achieve optical zoom shooting effects. Furthermore, the image capturing device 100r can acquire depth information of the image. The optical path reversal configurations of the image capturing devices 100i and 100j can, for example, have similar... Figures 30 to 32 The structure can be referred to the aforementioned corresponding structure. Figures 30 to 32 The explanation will not be repeated here. Furthermore, the imaging devices 100, 100k, 100m, 100n, 100p, 100q, and 100r may also have optical path reversal configurations, and may also have, for example, similar... Figures 30 to 32 The structure can be referred to the aforementioned corresponding structure. Figures 30 to 32The above-described electronic device 400 is exemplified by including multiple image capturing devices 100, 100i, 100j, 100k, 100m, 100n, 100p, 100q, and 100r, but the number and configuration of the image capturing devices are not intended to limit this disclosure. When a user photographs a subject, the electronic device 400 uses image capturing devices 100, 100i, 100j, 100k, 100m, 100n, 100p, 100q, or 100r to focus light and capture an image, activates the flash module 401 for supplemental lighting, and performs subsequent processing in a manner similar to the aforementioned embodiments, which will not be described in detail here.

[0334] The image capturing device disclosed herein is not limited to smartphones. It can also be applied to mobile focusing systems as needed, offering excellent aberration correction and good image quality. For example, the image capturing device can be used in a wide range of electronic devices, including 3D image capture, digital cameras, mobile products, tablet computers, smart TVs, network monitoring equipment, dashcams, reversing cameras, multi-lens systems, recognition systems, motion-sensing game consoles, drones, wearable products, and personal video recorders. The aforementioned electronic devices are merely illustrative examples of practical applications of this disclosure and do not limit the scope of application of the image capturing device disclosed herein.

[0335] Although this disclosure is presented above with reference to the preferred embodiments described above, it is not intended to limit this disclosure. Any person skilled in the art may make some modifications and refinements without departing from the spirit and scope of this disclosure. Therefore, the scope of patent protection of this disclosure shall be determined by the claims appended to this specification.

Claims

1. A photographic optical system, characterized in that, It includes six lenses, and the six lenses are, in order from the object side to the image side along the optical path, the first lens, the second lens, the third lens, the fourth lens, the fifth lens, and the sixth lens. Each of the six lenses has an object-side surface facing the object side and an image-side surface facing the image side; Among them, the first lens has a positive refractive power, the second lens has a negative refractive power, the third lens has a positive refractive power, the fourth lens has a positive refractive power, the object-side surface of the fourth lens is concave near the optical axis, the fifth lens has a negative refractive power, the object-side surface of the fifth lens is convex near the optical axis, and the image-side surface of the sixth lens has at least one inflection point; and Among them, the radius of curvature of the object-side surface of the first lens is R1, the radius of curvature of the image-side surface of the first lens is R2, the distance between the second lens and the third lens on the optical axis is T23, and the distance between the third lens and the fourth lens on the optical axis is T34, which satisfy the following conditions: 0.00 < (R1 + R2) / (R1 - R2); and 0.50 < T34 / T23 < 2.

00.

2. The photographic optical system according to claim 1, characterized in that, The image-side surface of the first lens is convex near the optical axis; and Among them, the radius of curvature of the object-side surface of the first lens is R1, the radius of curvature of the image-side surface of the first lens is R2, which satisfy the following conditions: 0.20 < (R1 + R2) / (R1 - R2) < 2.

00.

3. The photographic optical system according to claim 1, characterized in that, The maximum imaging height of the photographic optical system is ImgH, and the focal length of the photographic optical system is f, which satisfy the following conditions: 0.80 < ImgH / f < 1.

20.

4. The photographic optical system according to claim 1, characterized in that, The maximum viewing angle in the photographic optical system is FOV, which satisfy the following conditions: 88.0 degrees < FOV < 103.0 degrees.

5. The photographic optical system according to claim 1, characterized in that, It further includes an aperture. The distance from the aperture to the imaging surface on the optical axis is SL, and the focal length of the photographic optical system is f, which satisfy the following conditions: 1.50 < SL / f < 2.

00.

6. The photographic optical system according to claim 1, characterized in that, The focal length of the fifth lens is f5, and the focal length of the sixth lens is f6, which satisfy the following conditions: 0.00 < |f5 / f6| < 1.

00.

7. The photographic optical system according to claim 1, characterized in that, The distance from the object-side surface of the first lens to the imaging surface on the optical axis is TL, and the radius of curvature of the image-side surface of the third lens is R6, which satisfy the following conditions: -2.00 < TL / R6 < 0.

60.

8. The photographic optical system according to claim 1, characterized in that, The displacement amount parallel to the optical axis from the intersection point of the image-side surface of the fifth lens on the optical axis to the position of the maximum effective radius of the image-side surface of the fifth lens is SAG5R2, and the thickness of the fifth lens on the optical axis is CT5, which satisfy the following conditions: 0.00 < SAG5R2 / CT5 < 1.

00.

9. An image capturing device, characterized in that, It includes: The photographic optical system according to claim 1; and An electronic photosensitive element disposed on an imaging surface of the photographic optical system.

10. An electronic device, characterized in that, It includes: The imaging device according to claim 9.

11. A photographic optical system, characterized in that, It includes six lenses, which are, in order from the object side to the image side along the optical path, the first lens, the second lens, the third lens, the fourth lens, the fifth lens, and the sixth lens, and each of the six lenses has an object-side surface facing the object side and an image-side surface facing the image side; Among them, the first lens has a positive refractive power, the second lens has a negative refractive power, the image-side surface of the second lens is concave near the optical axis, the fourth lens has a positive refractive power, the object-side surface of the fourth lens is concave near the optical axis, the fifth lens has a negative refractive power, the object-side surface of the fifth lens is convex near the optical axis, and the image-side surface of the sixth lens has at least one inflection point; and Among them, the radius of curvature of the object-side surface of the first lens is R1, and the radius of curvature of the image-side surface of the first lens is R2, which satisfy the following conditions: 0.50 < (R1 + R2) / (R1 - R2) < 2.

50.

12. The photographic optical system according to claim 11, characterized in that, The third lens has a positive refractive power; and Among them, the distance from the object-side surface of the first lens to an imaging surface on the optical axis is TL, and the radius of curvature of the object-side surface of the first lens is R1, which satisfy the following conditions: -1.00 < TL / R1 < 1.

30.

13. The photographic optical system according to claim 11, characterized in that, The focal length of the photographic optical system is f, the focal length of the first lens is f1, the focal length of the fourth lens is f4, and the focal length of the sixth lens is f6, which satisfy the following conditions: -0.30 < f / f6; and 0.20 < |f1 / f4| < 1.

20.

14. The photographic optical system according to claim 11, characterized in that, The focal length of the photographic optical system is f, the radius of curvature of the image-side surface of the fifth lens is R10, and the radius of curvature of the image-side surface of the sixth lens is R12, which satisfy the following conditions: 5.00 < f / R10 + f / R12 < 8.

00.

15. The photographic optical system according to claim 11, characterized in that, The distance between the second lens and the third lens on the optical axis is T23, the distance between the third lens and the fourth lens on the optical axis is T34, the radius of curvature of the object-side surface of the fourth lens is R7, and the radius of curvature of the object-side surface of the fifth lens is R9, which satisfy the following conditions: 0.60 < T34 / T23 < 1.70; and 0.70 < |R7 / R9|.

16. The photographic optical system according to claim 11, characterized in that, The distance between the first lens and the second lens on the optical axis is T12, the distance between the fourth lens and the fifth lens on the optical axis is T45, and the distance between the fifth lens and the sixth lens on the optical axis is T56, which satisfy the following conditions: 0.00 < (T12 + T45) / T56 < 1.

50.

17. The photographic optical system according to claim 11, characterized in that, The displacement amount parallel to the optical axis from the intersection point of the object-side surface of the fourth lens on the optical axis to the maximum effective radius position of the object-side surface of the fourth lens is SAG4R1, and the displacement amount parallel to the optical axis from the intersection point of the image-side surface of the fourth lens on the optical axis to the maximum effective radius position of the image-side surface of the fourth lens is SAG4R2, which satisfy the following conditions: 0.00 < SAG4R2 / SAG4R1 < 3.

50.

18. The photographic optical system according to claim 11, characterized in that, The Abbe number of the fourth lens is V4, which satisfy the following conditions: 40.0<V4<80.0。 19. A photographic optical system, characterized in that, It includes six lenses, which are arranged sequentially from the object side to the image side along the light path as a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens, and each of the six lenses has an object-side surface facing the object side and an image-side surface facing the image side. The first lens has positive refractive power, the second lens has negative refractive power, the third lens has positive refractive power, and the image-side surface of the third lens is convex near the optical axis. The fourth lens has positive refractive power, and the object-side surface of the fourth lens is concave near the optical axis. The fifth lens has negative refractive power, and the object-side surface of the fifth lens is convex near the optical axis. The image-side surface of the sixth lens has at least one inflection point. Wherein, the radius of curvature of the object-side surface of the first lens is R1, and the radius of curvature of the image-side surface of the first lens is R2, which satisfies the following conditions: 0.10 < (R1 + R2) / (R1 - R2).

20. The photographic optical system according to claim 19, characterized in that, The image-side surface of the fifth lens is concave near the optical axis, and the image-side surface of the sixth lens is also concave near the optical axis.

21. The photographic optical system according to claim 19, characterized in that, The sixth lens has positive refractive power, and the image-side surface of the sixth lens has at least one critical point off-axis.

22. The photographic optical system according to claim 19, characterized in that, The distance from the object-side surface of the first lens to an imaging plane on the optical axis is TL, the maximum imaging height of the photographic optical system is ImgH, the aperture value of the photographic optical system is Fno, the radius of curvature of the object-side surface of the first lens is R1, and the radius of curvature of the image-side surface of the first lens is R2, which satisfy the following conditions: 1.30 <TL / ImgH<2.00; Fno<2.10; and 0.45 < (R1 + R2) / (R1 - R2) < 1.

70.

23. The photographic optical system according to claim 19, characterized in that, The second lens has a focal length of f2, and the third lens has a focal length of f3, satisfying the following conditions: 0.00 < |f2 / f3| < 1.

10.

24. The photographic optical system according to claim 19, characterized in that, The radius of curvature of the object-side surface of the first lens is R1, and the radius of curvature of the image-side surface of the first lens is R2, which satisfy the following conditions: -0.40 <R2 / R1<0.30。 25. The photographic optical system according to claim 19, characterized in that, The thickness of the third lens along the optical axis is CT3, and the thickness of the fourth lens along the optical axis is CT4, satisfying the following conditions: 0.70 <CT3 / CT4<1.60。 26. The photographic optical system according to claim 19, characterized in that, The maximum effective radius of the object-side surface of the first lens is Y1R1, and the maximum effective radius of the image-side surface of the sixth lens is Y6R2, which satisfy the following conditions: 2.00 <Y6R2 / Y1R1<4.50。 27. The photographic optical system according to claim 19, characterized in that, The radius of curvature of the object-side surface of the first lens is R1, the radius of curvature of the image-side surface of the first lens is R2, the radius of curvature of the image-side surface of the third lens is R6, the optical axis spacing between the first lens and the second lens is T12, the optical axis spacing between the second lens and the third lens is T23, the optical axis spacing between the third lens and the fourth lens is T34, the optical axis spacing between the fourth lens and the fifth lens is T45, the optical axis spacing between the fifth lens and the sixth lens is T56, the optical axis distance from the object-side surface of the first lens to an imaging plane is TL, the maximum effective radius of the object-side surface of the first lens is Y1R1, and the maximum effective radius of the image-side surface of the sixth lens is Y6R2, which satisfies the following conditions: 0.52≤(R1+R2) / (R1-R2)≤1.55; 0.79≤T34 / T23≤1.56; 0.20≤(T12+T45) / T56≤1.05; -1.52≤TL / R6≤0.37; -0.61≤TL / R1≤0.71; as well as 2.95≤Y6R2 / Y1R1≤3.55.

Images