Photographing optical lens system, image capturing unit and electronic device

Abstract

A photographic optical lens includes three lenses. The three lenses, arranged sequentially from the object side to the image side along the optical path, are a first lens, a second lens, and a third lens. Each of the three lenses has an object-side surface facing the object side and an image-side surface facing the image side. The image-side surface of the first lens is concave near the optical axis. The third lens has negative refractive power. The photographic optical lens further includes an aperture located between the first and second lenses. Under certain conditions, the photographic optical lens can simultaneously meet the requirements of miniaturization, a wide angle of view, and high image quality.

Description

[Technical Field]

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

[0002] With the advancement of semiconductor manufacturing technology, the performance of electronic image sensors has been improved, and pixels can reach smaller sizes. Therefore, optical lenses with high imaging quality have become an indispensable part.

[0003] As technology advances rapidly, electronic devices equipped with optical lenses are being used in a wider range of applications, leading to more diverse requirements for these lenses. Since traditional optical lenses have struggled to achieve a balance between requirements such as image quality, sensitivity, aperture size, size, and viewing angle, this invention provides an optical lens that meets these needs. [Summary of the Invention]

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

[0005] This disclosure provides a photographic optical lens comprising three lenses. The three lenses are sequentially arranged from the object side to the image side along the optical path as a first lens, a second lens, and a third lens. Each of the three lenses has an object-side surface facing the object side and an image-side surface facing the image side. Preferably, the image-side surface of the first lens is concave near the optical axis. Preferably, the third lens has negative refractive power. Preferably, the photographic optical lens further includes an aperture, and the aperture is located between the first lens and the second lens. The distance from the object-side surface of the first lens to the imaging plane on the optical axis is TL, the focal length of the photographic optical lens is f, the thickness of the first lens on the optical axis is CT1, the thickness of the second lens on the optical axis is CT2, the thickness of the third lens on the optical axis is CT3, the radius of curvature of the object-side surface of the third lens is R5, the radius of curvature of the image-side surface of the third lens is R6, and the aperture value of the photographic optical lens is Fno, which preferably satisfies the following conditions:

[0006] 1.80 < TL / f < 5.10;

[0007] 1.75 < (CT2+CT3) / CT1 < 6.50;

[0008] 0.40 < CT2 / CT3 < 2.50;

[0009] -1.20 < R5 / R6 < 0.39; and

[0010] 2.60<Fno<5.10.

[0011] This disclosure further provides a photographic optical lens comprising three lenses. The three lenses are sequentially arranged from the object side to the image side along the optical path as a first lens, a second lens, and a third lens. Each of the three lenses has an object-side surface facing the object side and an image-side surface facing the image side. Preferably, the third lens has negative refractive power. Wherein, the distance from the object-side surface of the first lens to the imaging plane on the optical axis is TL, the focal length of the photographic optical lens is f, the combined focal length of the first and second lenses is f12, the thickness of the first lens on the optical axis is CT1, the thickness of the second lens on the optical axis is CT2, the thickness of the third lens on the optical axis is CT3, the distance between the first and second lenses on the optical axis is T12, 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 second lens is R4, the radius of curvature of the object-side surface of the third lens is R5, and the radius of curvature of the image-side surface of the third lens is R6, preferably satisfying the following conditions:

[0012] 2.30 < TL / f < 4.80;

[0013] 1.75 < (CT2+CT3) / CT1 < 6.50;

[0014] 1.20 < T12 / CT1 < 4.20;

[0015] 0.50 < R5 / R4 < 3.30;

[0016] -0.60 < f / R1+f / R6 < 1.50; and

[0017] 0.90 < f / f12 < 4.00.

[0018] This disclosure provides an image capturing device, which includes the aforementioned photographic optical lens and an electronic photosensitive element, wherein the electronic photosensitive element is disposed on the imaging surface of the photographic optical lens.

[0019] This disclosure provides an electronic device that includes the aforementioned image capturing device.

[0020] When TL / f meets the above conditions, the relationship between the total length of the photographic optical lens and the angle of view can be effectively controlled, so as to achieve the application purpose of a large angle of view.

[0021] When (CT2+CT3) / CT1 meets the above conditions, it helps to match the arrangement design of the lens refractive force, increase the field of view of the photographic optical lens, and help to control the thickness of the lens, so as to reduce manufacturing tolerance and improve yield.

[0022] When CT2 / CT3 meets the above conditions, it helps to balance the spatial configuration of the photographic optical lenses, thereby reducing sensitivity and improving productivity.

[0023] When R5 / R6 meets the above conditions, the surface shape and refractive power of the third lens can be adjusted, which helps to correct field curvature and distortion problems.

[0024] When Fno meets the above conditions, the aperture size can be adjusted to achieve a balance between image illumination, depth of field and image quality.

[0025] When T12 / CT1 meets the above conditions, it can be combined with a wide angle of view design, which helps to adjust the optical path at the object side of the photographic optical lens.

[0026] When R5 / R4 meets the above conditions, the second lens and the third lens can cooperate to adjust the deflection angle of the light, which helps to correct the image quality.

[0027] When f / R1+f / R6 meets the above conditions, it helps to adjust the incident angle of light entering the photographic optical lens and the incident angle of light entering the imaging surface, which can effectively increase the light-gathering quality of the paraxial field of view.

[0028] When f / f12 meets the above conditions, it is beneficial to enhance light convergence and can effectively reduce the size of photographic optical lenses.

Implementation Method

[0030] The photographic optical lens includes three lenses, which are arranged sequentially from the object side to the image side along the light path as a first lens, a second lens, and a third lens. Each of the three lenses has an object-side surface facing the object side and an image-side surface facing the image side.

[0031] The first lens may have negative refractive power; thereby, it is beneficial to expand the viewing angle to obtain a wider range of image information. The image-side surface of the first lens may be concave near the optical axis; thereby, it is beneficial to receive light from a wide viewing angle to achieve a wider photographic range.

[0032] The second lens may have positive refractive power; thereby, light can be effectively converged, reducing the size of the photographic optical lens. The object-side surface of the second lens may be convex near the optical axis; thereby, it helps to correct spherical aberration and improve image quality. The image-side surface of the second lens may be convex near the optical axis; thereby, it provides the second lens with the ability to converge light, avoiding the problem of insufficient light convergence due to insufficient refraction of light in the peripheral areas.

[0033] The third lens may have negative refractive power; thereby, it helps to balance the overall distribution of refractive power and control the back focal length to meet application requirements. The object-side surface of the third lens may be concave near the optical axis; thereby, it helps to buffer incident light at a large angle and correct aberrations.

[0034] The photographic optical lens disclosed herein may further include an aperture, which may be located between the first lens and the second lens. This allows for adjustment of the aperture's position, facilitating a balance between angle of view, overall length, depth of field, and image illumination.

[0035] At least one of the object-side surface of the first lens and the image-side surface of the third lens may be planar near the optical axis. This facilitates the production process and improves product manufacturability. The object-side surface of the first lens may be planar near the optical axis and may be bonded to a plate. The image-side surface of the third lens may be planar near the optical axis and may be bonded to a plate. The plate may facilitate lens forming and lens assembly. The plate may be, for example, made of glass or plastic. The fixing method between the lens and the plate may use techniques such as bonding, etching, or nanoimprinting, but this disclosure is not limited thereto.

[0036] The photographic optical lens disclosed herein can be used for shooting within a range where the object distance to the subject is less than or equal to 30 mm. This allows the photographic optical lens to be applied to close-up photography, thereby expanding the product's application range and usage opportunities. The photographic optical lens can also be used for shooting within a range where the object distance to the subject is less than or equal to 20 mm. Furthermore, the photographic optical lens can also be used for shooting within a range where the object distance to the subject is less than or equal to 10 mm.

[0037] The distance from the object-side surface of the first lens to the imaging plane on the optical axis is TL, and the focal length of the photographic optical lens is f, which satisfies the following condition: 1.80 < TL / f < 5.10. This effectively controls the relationship between the total length of the photographic optical lens and the angle of view, facilitating the application of a large angle of view. The following conditions can also be satisfied: 2.00 < TL / f < 4.80. The following conditions can also be satisfied: 2.30 < TL / f < 4.80. The following conditions can also be satisfied: 2.50 ≤ TL / f ≤ 4.45.

[0038] The thickness of the first lens on the optical axis is CT1, the thickness of the second lens on the optical axis is CT2, and the thickness of the third lens on the optical axis is CT3, which satisfies the following condition: 1.75 < (CT2+CT3) / CT1 < 6.50. This helps to coordinate with the arrangement design of the lens refractive power, increase the field of view of the photographic optical lens, and facilitates control over the thickness of the lenses, thereby reducing manufacturing tolerances and improving yield. The following condition can also be satisfied: 1.85 < (CT2+CT3) / CT1 < 6.00. The following condition can also be satisfied: 1.99 ≤ (CT2+CT3) / CT1 ≤ 5.72.

[0039] The thickness of the second lens on the optical axis is CT2, and the thickness of the third lens on the optical axis is CT3, which can satisfy the following condition: 0.40 < CT2 / CT3 < 2.50. This helps to balance the spatial configuration of photographic optical lenses, thereby reducing sensitivity and improving productivity. The following conditions can also be satisfied: 0.55 < CT2 / CT3 < 2.40. The following conditions can also be satisfied: 0.65 < CT2 / CT3 < 2.30. The following conditions can also be satisfied: 0.85 ≤ CT2 / CT3 ≤ 2.09.

[0040] The radius of curvature of the object-side surface of the third lens is R5, and the radius of curvature of the image-side surface of the third lens is R6, which can satisfy the following condition: -2.00 < R5 / R6 < 0.35. This allows for adjustment of the surface shape and refractive power of the third lens, helping to correct field curvature and distortion problems. It can also satisfy the following conditions: -1.20 < R5 / R6 < 0.39. Furthermore, it can satisfy the following conditions: -0.90 < R5 / R6 < 0.30. Finally, it can satisfy the following conditions: -0.54 ≤ R5 / R6 ≤ 0.20.

[0041] The aperture value (F-number) of a photographic optical lens is Fno, which can satisfy the following conditions: 2.60 < Fno < 5.10. This allows for adjustment of the aperture size to achieve a balance between image illumination, depth of field, and image quality. It can also satisfy the following conditions: 2.80 < Fno < 4.90. Furthermore, it can also satisfy the following condition: 3.30 ≤ Fno ≤ 4.70.

[0042] The distance between the first lens and the second lens on the optical axis is T12, and the thickness of the first lens on the optical axis is CT1, which can satisfy the following conditions: 1.20 < T12 / CT1 < 5.00. This allows for a large angle-of-view design and facilitates optical path adjustment at the object-side of the photographic lens. It can also satisfy the following conditions: 1.30 < T12 / CT1 < 4.60. It can also satisfy the following conditions: 1.20 < T12 / CT1 < 4.20. It can also satisfy the following conditions: 1.66 ≤ T12 / CT1 ≤ 3.85.

[0043] The radius of curvature of the image-side surface of the second lens is R4, and the radius of curvature of the object-side surface of the third lens is R5, which can satisfy the following condition: 0.50 < R5 / R4 < 3.30. This allows the second and third lenses to work together to adjust the refraction angle of light, helping to correct image quality. The following conditions can also be satisfied: 0.65 < R5 / R4 < 3.00. The following conditions can also be satisfied: 0.85 < R5 / R4 < 2.80. The following conditions can also be satisfied: 1.19 ≤ R5 / R4 ≤ 2.55.

[0044] The focal length of the photographic optical lens is f, 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 third lens is R6. This satisfies the following condition: -0.60 < f / R1 + f / R6 < 1.50. This helps to adjust the incident angle of light on the photographic optical lens and the incident angle of light on the imaging plane, effectively increasing the light-gathering quality of the paraxial field of view. It also satisfies the following condition: -0.55 < f / R1 + f / R6 < 1.30. Furthermore, it satisfies the following condition: -0.45 < f / R1 + f / R6 < 1.10. Finally, it satisfies the following condition: -0.32 ≤ f / R1 + f / R6 ≤ 0.90.

[0045] The focal length of the photographic optical lens is f, and the combined focal length of the first lens and the second lens is f12, which satisfies the following condition: 0.90 < f / f12 < 4.00. This is beneficial for enhancing light convergence and can effectively reduce the size of the photographic optical lens. It also satisfies the following condition: 1.25 < f / f12 < 3.30. Furthermore, it also satisfies the following condition: 1.67 ≤ f / f12 ≤ 2.93.

[0046] The distance between the second lens and the third lens on the optical axis is T23, and the thickness of the third lens on the optical axis is CT3, which can satisfy the following condition: 0.03 < T23 / CT3 < 3.00. This allows adjustment of the ratio between the position of the third lens and its center thickness, facilitating optical path adjustment at the image side of the photographic lens and improving image quality. It can also satisfy the following condition: 0.05 < T23 / CT3 < 2.50. It can also satisfy the following condition: 0.05 < T23 / CT3 < 2.00.

[0047] The focal length of the photographic optical lens is f, the focal length of the first lens is f1, the focal length of the second lens is f2, and the focal length of the third lens is f3, which can satisfy the following condition: -1.50 < f / f1 + f / f2 + f / f3 < 0.20. This facilitates aberration correction by balancing the overall refractive power distribution of the photographic optical lens. It can also satisfy the following condition: -1.20 < f / f1 + f / f2 + f / f3 < 0.15. It can also satisfy the following condition: -1.00 < f / f1 + f / f2 + f / f3 < 0.10. In the photographic optical lens disclosed in this disclosure, the focal length of a single lens is calculated based on the assumption that both the front and rear media of the single lens are air.

[0048] The thickness of the first lens on the optical axis is CT1, and the thickness of the second lens on the optical axis is CT2, which can satisfy the following condition: 0.15 < CT1 / CT2 < 1.05. This allows adjustment of the center thickness ratio of the first and second lenses to achieve a balance between the molding yield of the first and second lenses and the total length of the photographic optical lens. The following condition can also be satisfied: 0.20 < CT1 / CT2 < 1.00. The following condition can also be satisfied: 0.25 < CT1 / CT2 < 0.95.

[0049] The maximum imaging height of the photographic optical lens (which can be half the total diagonal length of the effective sensing area of ​​the electronic image sensor) is 1 mgH, and the focal length of the photographic optical lens is f, which can satisfy the following condition: 0.65 < 1 mgH / f < 1.50. Therefore, by appropriately controlling the ratio between image height and focal length, it is possible to achieve miniaturization of the photographic optical lens while simultaneously increasing the imaging area to receive more light.

[0050] The distance from the image-side surface of the third lens to the imaging plane on the optical axis is BL, and the distance from the object-side surface of the first lens to the image-side surface of the third lens on the optical axis is TD. These distances satisfy the following condition: 0.10 < BL / TD < 0.60. This facilitates a balance between the size and manufacturability of the photographic optical lens.

[0051] The focal length of the photographic optical lens is f, and the focal length of the third lens is f3, which satisfies the following condition: -3.00 < f / f3 < -0.30. This allows the third lens to possess a certain negative refractive power, which helps to increase the imaging area. It also satisfies the following condition: -2.50 < f / f3 < -0.50.

[0052] The maximum field of view (FOV) in a photographic optical lens can satisfy the following conditions: 125.0 degrees < FOV < 175.0 degrees. This ensures that the photographic optical lens has a large field of view, thereby expanding the application range of the product. It can also satisfy the following condition: 128.0 degrees < FOV < 172.0 degrees.

[0053] The displacement parallel to the optical axis from the intersection of the image-side surface of the third lens with the optical axis to the position of the maximum effective radius of the image-side surface of the third lens is SAG3R2, and the thickness of the third lens on the optical axis is CT3. This satisfies the following condition: -0.30 < SAG3R2 / CT3 < 0.35. This regulates the degree of peripheral surface shape change of the image-side surface of the third lens, which helps in the aberration correction of the peripheral field of view. It also satisfies the following condition: -0.20 < SAG3R2 / CT3 < 0.30. Furthermore, it satisfies the following condition: -0.15 < SAG3R2 / CT3 < 0.25. Please refer to Figure 26, which illustrates a schematic diagram of the parameter SAG3R2 according to the second embodiment of this disclosure, where the displacement is positive in the image-side direction and negative in the object-side direction.

[0054] The focal length of the photographic optical lens is f, and the focal length of the first lens is f1, which can satisfy the following condition: -1.50 < f / f1 < 0.20. This allows adjustment of the refractive power of the first lens to achieve a balance between expanding the light-gathering range and the size of the photographic optical lens. It can also satisfy the following condition: -1.30 < f / f1 < 0.00.

[0055] The distance between the second and third lenses on the optical axis is T23, and the thickness of the second lens on the optical axis is CT2, which satisfies the following condition: 0.03 < T23 / CT2 < 1.00. This allows for effective adjustment of the inter-lens distance between the second and third lenses, thereby controlling the overall length of the photographic optical lens. It also satisfies the following condition: 0.05 < T23 / CT2 < 0.85.

[0056] The focal length of the first lens is f1, and the radius of curvature of the image-side surface of the first lens is R2, which satisfies the following condition: -3.50 < f1 / R2 < 0.00. Therefore, by adjusting the surface shape and refractive power of the first lens, the angle of view and spherical aberration of the photographic optical lens can be balanced. The following conditions can also be satisfied: -3.00 < f1 / R2 < -0.50. The following condition can also be satisfied: -3.00 < f1 / R2 < -1.20.

[0057] The maximum effective radius of the image-side surface of the first lens is Y1R2, and the maximum effective radius of the object-side surface of the second lens is Y2R1, which can satisfy the following condition: 0.95 < Y1R2 / Y2R1 < 2.00. This helps to improve the peripheral light divergence problem often found in large-angle lenses and helps to correct off-axis aberrations. Please refer to Figure 26, which is a schematic diagram illustrating parameters Y1R2 and Y2R1 according to the second embodiment of this disclosure.

[0058] The distance from the position of the maximum effective radius of the object-side surface of the first lens to the position of the maximum effective radius of the image-side surface of the first lens, parallel to the optical axis, is ET1. The distance from the position of the maximum effective radius of the object-side surface of the third lens to the position of the maximum effective radius of the image-side surface of the third lens, parallel to the optical axis, is ET3. These distances satisfy the following condition: 0.50 < ET3 / ET1 < 2.50. This allows adjustment of the lens edge thickness of the first and third lenses, achieving a balance between lens forming difficulty and lens assembly yield. The following condition can also be satisfied: 0.60 < ET3 / ET1 < 2.30. Please refer to Figure 26, which illustrates a schematic diagram of parameters ET1 and ET3 according to the second embodiment of this disclosure.

[0059] The various technical features of the photographic optical lens disclosed in this disclosure can be combined and configured to achieve corresponding effects.

[0060] In the photographic optical lens disclosed in this disclosure, the lens material can be glass or plastic. If the lens material is glass, the degree of freedom in configuring the refractive power of the photographic optical lens can be increased, and the influence of external environmental temperature changes on imaging can be reduced. Glass lenses can be manufactured using techniques such as grinding or molding. If the lens material is plastic, production costs can be effectively reduced. In addition, spherical (SPH) or aspherical (ASP) surfaces can be provided on the lens surface. Spherical lenses reduce manufacturing difficulty, while aspherical surfaces provide more controllable variables to reduce aberrations, reduce the number of lenses, and effectively reduce the overall length of the photographic optical lens disclosed in this disclosure. Furthermore, aspherical surfaces can be manufactured by plastic injection molding or molding glass lenses.

[0061] In the photographic optical lens disclosed herein, if the lens surface is aspherical, it means that all or part of the optically effective area of ​​the lens surface is aspherical.

[0062] In the photographic optical lens disclosed herein, additives can be selectively added to any (or more) lens materials to produce light absorption or light interference effects, thereby changing the lens's transmittance for specific wavelengths of light and reducing stray light and color shift. For example, the additives may have the function of filtering out light in the 600-800 nm wavelength range to help reduce excess red or infrared light; or they may filter out light in the 350-450 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 a lens using injection molding technology. In addition, the additives can also be deposited on the lens surface as a coating to provide the above-mentioned effects.

[0063] In the photographic optical lens disclosed herein, if the lens surface is convex and the position 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 position 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 refractive power, focal length, or radius of curvature of the lens is not defined in its region, it means that the refractive power, focal length, or radius of curvature of the lens can be the refractive power, focal length, or radius of curvature of the lens near the optical axis. The focal length of a single lens is calculated based on the assumption that both the front and rear media of the single lens are air.

[0064] In the photographic optical lens disclosed herein, the imaging surface of the photographic optical lens may 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.

[0065] In the photographic optical lens 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 bending). 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.

[0066] In the photographic optical lens disclosed herein, at least one element with a light path reversing 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, etc., to provide a more flexible spatial configuration for the photographic optical lens, allowing the thinness and lightness of electronic devices to be unrestricted by the total optical length of the photographic optical lens. Further explanation is provided in Figures 27 and 28, where Figure 27 is a schematic diagram illustrating one configuration of a light path reversing element in a photographic optical lens according to this disclosure, and Figure 28 is a schematic diagram illustrating another configuration of a light path reversing element in a photographic optical lens according to this disclosure. As shown in Figures 27 and 28, the photographic optical lens can travel along the light path from the subject (not shown) to the imaging surface IMG, and has a first optical axis OA1, a light path reversing element LF and a second optical axis OA2 in sequence. The light path reversing element LF can be disposed between the subject and the lens group LG of the photographic optical lens as shown in Figure 27, or between the lens group LG of the photographic optical lens and the imaging surface IMG as shown in Figure 28. Furthermore, please refer to Figure 29, which illustrates a schematic diagram of the configuration of two optical path reversing elements according to this disclosure in a photographic optical lens. As shown in Figure 29, the photographic optical lens can also have 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 along the light path from the subject (not shown) to the imaging plane IMG. The first optical path reversing element LF1 is disposed between the subject and the lens group LG of the photographic optical lens, and the second optical path reversing element LF2 is disposed between the lens group LG and the imaging plane IMG. The direction of light travel on the first optical axis OA1 can be the same as the direction of light travel on the third optical axis OA3, as shown in Figure 29. The photographic optical lens can also selectively be configured with more than three optical path reversing elements. This disclosure is not limited to the type, number, and position of the optical path reversing elements disclosed in the figures.

[0067] The photographic optical lens disclosed herein may be provided with at least one aperture stop, which may be located in front of 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, which can be used to reduce stray light and help improve image quality.

[0068] In the photographic optical lens disclosed herein, the aperture configuration can be a front aperture or a center aperture. A front aperture means the aperture is set between the subject and the first lens, while a center aperture means the aperture is set between the first lens and the imaging plane. If the aperture is a front aperture, it allows for a longer distance between the exit pupil and the imaging plane, giving it a telecentric effect and increasing the efficiency of image reception by the CCD or CMOS sensor. A center aperture helps to expand the field of view of the photographic optical lens.

[0069] This disclosure may appropriately include a variable aperture element, which may be a mechanical component or a light control element, and whose aperture size and shape can be controlled electrically or by electrical signals. The mechanical component may include movable parts such as a blade assembly or a shielding plate; the light control element may include a filter element, an electrochromic material, a liquid crystal layer, or other masking material. The variable aperture element can enhance the image adjustment capability by controlling the amount of light entering the image or the exposure time. In addition, the variable aperture element may also be the aperture of this disclosure, and the image quality, such as depth of field or exposure speed, can be adjusted by changing the aperture value.

[0070] This disclosure allows for the appropriate placement of one or more optical elements to restrict the form of light passing through a photographic optical lens. 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 lens of the photographic optical lens to control the passage of specific forms of light, thereby meeting application requirements.

[0071] The photographic optical lens disclosed herein may include at least one optical lens, optical element, or carrier, at least one surface of which has a low-reflection layer, which can effectively reduce stray light generated by light reflection at the interface. The low-reflection layer may be disposed in the non-effective area of ​​the object-side surface or image-side surface of the optical lens, or on the connecting surface between the object-side surface and the image-side surface; the optical element may be a light-shielding element, an annular spacer element, a lens barrel element, a cover glass, a 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.

[0072] In the photographic optical lens disclosed herein, the object side and the image side are determined according to the optical axis direction, and the data on the optical axis are calculated along the optical axis. If the optical axis is turned by an optical path turning element, the data on the optical axis are also calculated along the optical axis.

[0073] Based on the above embodiments, specific examples are presented below and described in detail with reference to the accompanying drawings.

[0074] <First Embodiment>

[0075] Please refer to Figures 1 and 2, where Figure 1 shows a schematic diagram of the imaging device according to the first embodiment of this disclosure, and Figure 2, from left to right, shows the spherical aberration, astigmatism, and distortion curves of the first embodiment. As shown in Figure 1, the imaging device 1 includes a photographic optical lens (not otherwise labeled) and an electronic image sensor IS. The photographic optical lens, along the optical path from the object side to the image side, includes a first plate E4, a first lens E1, an aperture ST, a second lens E2, a third lens E3, a second plate E5, a filter element (Filter) E6, and an imaging surface IMG. The electronic image sensor IS is disposed on the imaging surface IMG. The photographic optical lens includes three lenses (E1, E2, E3), and there are no other interposed lenses between each lens.

[0076] The first plate E4 is made of glass and is positioned between the object being photographed and the first lens E1, without affecting the focal length of the photographic optical lens.

[0077] The first lens E1 has negative refractive power and is made of glass. Its object-side surface is flat near the optical axis, its image-side surface is concave near the optical axis, its object-side surface is spherical, its image-side surface is aspherical, and its object-side surface is bonded to the first plate E4.

[0078] The second lens E2 has positive refractive power and is made of glass. 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.

[0079] The third lens E3 has negative refractive power and is made of plastic. Its object-side surface is concave near the optical axis, its image-side surface is flat near the optical axis, its object-side surface is aspherical, its image-side surface is spherical, and its image-side surface is bonded to the second plate E5.

[0080] The second plate E5 is made of glass and is located between the third lens E3 and the imaging surface IMG. It does not affect the focal length of the photographic optical lens.

[0081] The filter element E6 is made of glass and is disposed between the second plate E5 and the imaging surface IMG, without affecting the focal length of the photographic optical lens. The filter element E6 is bonded to the second plate E5.

[0082] The curve equations of the aspherical surfaces of the above lenses are expressed as follows:

[0083] 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;

[0084] Y: The perpendicular distance between a point on the aspherical curve and the optical axis;

[0085] R: Radius of curvature;

[0086] k: cone coefficient; and

[0087] Ai: The i-th order aspherical coefficient.

[0088] In the photographic optical lens of the first embodiment, the focal length of the photographic optical lens is f, the aperture value of the photographic optical lens is Fno, and half of the maximum angle of view in the photographic optical lens is HFOV, with the following values: f = 0.51 mm, Fno = 3.91, HFOV = 76.6 degrees.

[0089] The maximum angle of view in a photographic optical lens is FOV, which satisfies the following condition: FOV = 153.2 degrees.

[0090] 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 focal length of the photographic optical lens is f, which satisfies the following condition: TL / f = 3.49.

[0091] The maximum imaging height of the photographic optical lens is ImgH, and the focal length of the photographic optical lens is f, which satisfies the following condition: ImgH / f = 1.06.

[0092] The distance from the image-side surface of the third lens E3 to the imaging plane IMG on the optical axis is BL, and the distance from the object-side surface of the first lens E1 to the image-side surface of the third lens E3 on the optical axis is TD, which satisfies the following condition: BL / TD = 0.38.

[0093] The focal length of the photographic optical lens is f, and the focal length of the first lens E1 is f1, which satisfies the following condition: f / f1 = -0.70.

[0094] The focal length of the photographic optical lens is f, and the focal length of the third lens E3 is f3, which satisfies the following condition: f / f3 = -1.07.

[0095] The focal length of the photographic optical lens is f, and the combined focal length of the first lens E1 and the second lens E2 is f12, which satisfies the following condition: f / f12 = 1.99.

[0096] The focal length of the photographic optical lens is f, the focal length of the first lens E1 is f1, the focal length of the second lens E2 is f2, and the focal length of the third lens E3 is f3. They satisfy the following condition: f / f1+f / f2+f / f3 = -0.27.

[0097] The focal length of the photographic optical lens is f, 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 third lens E3 is R6, which satisfies the following condition: f / R1+f / R6 = 0.00.

[0098] The focal length of the first lens E1 is f1, and the radius of curvature of the image-side surface of the first lens E1 is R2, which satisfies the following condition: f1 / R2 = -1.96.

[0099] The radius of curvature of the image-side surface of the second lens E2 is R4, and the radius of curvature of the object-side surface of the third lens E3 is R5, which satisfies the following condition: R5 / R4 = 1.27.

[0100] The radius of curvature of the object-side surface of the third lens E3 is R5, and the radius of curvature of the image-side surface of the third lens E3 is R6, which satisfies the following condition: R5 / R6 = 0.00.

[0101] The thickness of the first lens E1 on the optical axis is CT1, and the thickness of the second lens E2 on the optical axis is CT2, which satisfies the following condition: CT1 / CT2 = 0.51.

[0102] The thickness of the second lens E2 on the optical axis is CT2, and the thickness of the third lens E3 on the optical axis is CT3, which satisfies the following condition: CT2 / CT3 = 1.24.

[0103] The distance between the first lens E1 and the second lens E2 on the optical axis is T12, and the thickness of the first lens E1 on the optical axis is CT1, which satisfies the following condition: T12 / CT1 = 2.71. In this embodiment, the distance between two adjacent lenses on the optical axis refers to the distance between two adjacent mirror surfaces of the two adjacent lenses on the optical axis.

[0104] The distance between the second lens E2 and the third lens E3 on the optical axis is T23, and the thickness of the second lens E2 on the optical axis is CT2, which satisfies the following condition: T23 / CT2 = 0.37.

[0105] The distance between the second lens E2 and the third lens E3 on the optical axis is T23, and the thickness of the third lens E3 on the optical axis is CT3, which satisfies the following condition: T23 / CT3 = 0.46.

[0106] The thickness of the first lens E1 on the optical axis is CT1, the thickness of the second lens E2 on the optical axis is CT2, and the thickness of the third lens E3 on the optical axis is CT3. They satisfy the following condition: (CT2+CT3) / CT1 = 3.52.

[0107] The distance from the position of the maximum effective radius of the object-side surface of the first lens E1 to the position of the maximum effective radius of the image-side surface of the first lens E1 parallel to the optical axis is ET1, and the distance from the position of the maximum effective radius of the object-side surface of the third lens E3 to the position of the maximum effective radius of the image-side surface of the third lens E3 parallel to the optical axis is ET3, which satisfies the following condition: ET3 / ET1 = 1.17.

[0108] The maximum effective radius of the image-side surface of the first lens E1 is Y1R2, and the maximum effective radius of the object-side surface of the second lens E2 is Y2R1, which satisfies the following condition: Y1R2 / Y2R1 = 1.08.

[0109] The displacement parallel to the optical axis from the intersection of the image-side surface of the third lens E3 with the optical axis to the position of the maximum effective radius of the image-side surface of the third lens E3 is SAG3R2, and the thickness of the third lens E3 on the optical axis is CT3, which satisfies the following condition: SAG3R2 / CT3 = 0.00. In this embodiment, the image-side surface of the third lens E3 is a plane, so the displacement parallel to the optical axis from the intersection of the image-side surface of the third lens E3 with the optical axis to the position of the maximum effective radius is zero, therefore the value of SAG3R2 is zero.

[0110] Please refer to Table 1A and Table 1B below.

[0111] Table 1A, First Embodiment f (focal length) = 0.51 mm, Fno (aperture value) = 3.91, HFOV (half angle of view) = 76.6 degrees surface radius of curvature thickness Material Refractive index Abbe number focal length 0 Subject unlimited 15,000 1 First Tablet flat 0.200 Glass 1.517 64.2 - 2 flat 0.010 Adhesion 1.485 53.2 3 First lens flat (SPH) 0.162 Glass 1.510 63.4 -0.73 4 0.3735 (ASP) 0.368 5 aperture flat 0.071 6 Second lens 0.3599 (ASP) 0.315 Glass 1.540 59.7 0.34 7 -0.2606 (ASP) 0.118 8 Third lens -0.3320 (ASP) 0.255 plastic 1.697 16.3 -0.48 9 flat (SPH) 0.010 Adhesion 1.485 53.2 10 Second plate flat 0.300 Glass 1.517 64.2 - 11 flat 0.010 Adhesion 1.485 53.2 12 Filter element flat 0.100 Glass 1.517 64.2 - 13 flat 0.069 14 Imaging surface flat - The reference wavelength (d-line) is 587.6 nm.

[0112] Table 1B, Aspheric Coefficients surface 4 6 7 8 k = -7.05045E-01 -4.96304E-02 -4.23889E-01 -4.38008E-01 A4 = 6.1294E+00 -5.2848E+00 1.4995E+01 1.2919E+01 A6 = 1.1900E+01 1.3276E+02 -9.6878E+01 -2.5127E+02 A8 = 2.6931E+02 -4.3633E+03 3.8553E+03 4.8031E+03 A10 = 1.5664E+03 6.7543E+04 -1.0682E+05 -1.6958E+05 A12 = 1.8653E+04 -4.5985E+05 1.3028E+06 3.2969E+06 A14 = - - -6.0425E+06 -3.2058E+07

[0113] Table 1A contains detailed structural data for the first embodiment of Figure 1, where the units for radius of curvature, thickness, and focal length are millimeters (mm), and surfaces 0 to 14 sequentially represent the surfaces from the object side to the image side. Table 1B contains aspherical data for the first embodiment, where k is the taper coefficient in the aspherical curve equation, and A4 to A14 represent the 4th to 14th order aspherical coefficients of each surface. Furthermore, the tables for the following embodiments are schematic diagrams and aberration curves corresponding to 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.

[0114] <Second Implementation Example>

[0115] Please refer to Figures 3 and 4, where Figure 3 shows a schematic diagram of the imaging device according to the second embodiment of this disclosure, and Figure 4, from left to right, shows the spherical aberration, astigmatism, and distortion curves of the second embodiment. As shown in Figure 3, the imaging device 2 includes a photographic optical lens (unlabeled) and an electronic image sensor IS. The photographic optical lens, along the optical path from the object side to the image side, includes a first lens E1, an aperture ST, a second lens E2, a third lens E3, a filter element E6, and an imaging surface IMG. The electronic image sensor IS is disposed on the imaging surface IMG. The photographic optical lens includes three lenses (E1, E2, E3), and there are no other interposed lenses between each lens.

[0116] The first lens E1 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.

[0117] The second lens E2 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.

[0118] The third lens E3 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.

[0119] The filter element E6 is made of glass and is located between the third lens E3 and the imaging surface IMG. It does not affect the focal length of the photographic optical lens.

[0120] Please refer to Table 2A and Table 2B below.

[0121] Table 2A, Second Embodiment f (focal length) = 0.43 mm, fno (aperture value) = 3.30, HFOV (half angle of view) = 70.3 degrees surface radius of curvature thickness Material Refractive index Abbe number focal length 0 Subject unlimited unlimited 1 First lens 0.9615 (ASP) 0.130 plastic 1.544 56.0 -0.65 2 0.2471 (ASP) 0.420 3 aperture flat 0.080 4 Second lens 0.4380 (ASP) 0.411 plastic 1.544 56.0 0.33 5 -0.2064 (ASP) 0.040 6 Third lens -0.5259 (ASP) 0.332 plastic 1.697 16.3 -0.45 7 0.9650 (ASP) 0.110 8 Filter element flat 0.150 Glass 1.517 64.2 - 9 flat 0.143 10 Imaging surface flat - The reference wavelength (d-line) is 587.6 nm.

[0122] Table 2B, Aspheric Coefficient surface 1 2 4 5 6 7 k = -7.57514E+00 -7.91975E-01 -1.00458E-01 -8.14275E-01 -1.96399E+00 -5.15868E+00 A4 = 9.2637E-01 6.7611E+00 -3.6731E+00 3.8417E+01 3.0066E+01 1.4900E+00 A6 = -1.1248E+01 -7.9528E+01 4.1090E+01 -9.1120E+02 -9.7775E+02 -3.0504E+01 A8 = 2.8992E+01 2.3547E+03 -8.7215E+02 1.5727E+04 1.8022E+04 1.5653E+02 A10 = -2.1710E+01 -3.8197E+04 1.2845E+04 -1.6655E+05 -2.1651E+05 -2.4093E+02 A12 = - 2.0665E+05 -6.3390E+04 9.5218E+05 1.3943E+06 - A14 = - - - -1.9443E+06 -3.5356E+06 -

[0123] In the second embodiment, the equation of 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. In this embodiment, the direction of SAG3R2 points towards the image side, therefore its value is positive.

[0124] Table 2C, Polynomial Data f [millimeters] 0.43 f1 / R2 -2.64 Fno 3.30 R5 / R4 2.55 HFOV [degree] 70.3 R5 / R6 -0.54 FOV [degree] 140.6 CT1 / CT2 0.32 TL / f 4.20 CT2 / CT3 1.24 ImgH / f 1.20 T12 / CT1 3.85 BL / TD 0.29 T23 / CT2 0.10 f / f1 -0.66 T23 / CT3 0.12 f / f3 -0.97 (CT2+CT3) / CT1 5.72 f / f12 2.04 ET3 / ET1 1.88 f / f1+f / f2+f / f3 -0.33 Y1R2 / Y2R1 1.08 f / R1+f / R6 0.90 SAG3R2 / CT3 0.16

[0125] <Third Embodiment>

[0126] Please refer to Figures 5 and 6, where Figure 5 shows a schematic diagram of the imaging device according to the third embodiment of this disclosure, and Figure 6, from left to right, shows the spherical aberration, astigmatism, and distortion curves of the third embodiment. As shown in Figure 5, the imaging device 3 includes a photographic optical lens (not otherwise labeled) and an electronic image sensor IS. The photographic optical lens, along the optical path from the object side to the image side, includes a first plate E4, a first lens E1, an aperture ST, a second lens E2, a third lens E3, a second plate E5, a filter element E6, and an imaging surface IMG. The electronic image sensor IS is disposed on the imaging surface IMG. The photographic optical lens includes three lenses (E1, E2, E3), and there are no other interposed lenses between each lens.

[0127] The first plate E4 is made of glass and is placed between the object being photographed and the first lens E1. It does not affect the focal length of the photographic optical lens.

[0128] The first lens E1 has negative refractive power and is made of plastic. Its object-side surface is flat near the optical axis, its image-side surface is concave near the optical axis, its object-side surface is spherical, its image-side surface is aspherical, and its object-side surface is bonded to the first plate E4.

[0129] The second lens E2 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.

[0130] The third lens E3 has negative refractive power and is made of plastic. Its object-side surface is concave near the optical axis, its image-side surface is flat near the optical axis, its object-side surface is aspherical, its image-side surface is spherical, and its image-side surface is bonded to the second plate E5.

[0131] The second plate E5 is made of glass and is located between the third lens E3 and the imaging surface IMG. It does not affect the focal length of the photographic optical lens.

[0132] The filter element E6 is made of glass and is disposed between the second plate E5 and the imaging surface IMG, without affecting the focal length of the photographic optical lens. The filter element E6 is bonded to the second plate E5.

[0133] Please refer to Table 3A and Table 3B below.

[0134] Table 3A, Third Embodiment f (focal length) = 0.43 mm, Fno (aperture value) = 4.50, HFOV (half angle of view) = 70.0 degrees surface radius of curvature thickness Material Refractive index Abbe number focal length 0 Subject unlimited 10.000 1 First Tablet flat 0.200 Glass 1.517 64.2 - 2 flat 0.010 Adhesion 1.485 53.2 3 First lens flat (SPH) 0.170 plastic 1.544 56.0 -0.44 4 0.2373 (ASP) 0.289 5 aperture flat 0.034 6 Second lens 0.3226 (ASP) 0.379 plastic 1.544 56.0 0.31 7 -0.2073 (ASP) 0.076 8 Third lens -0.3286 (ASP) 0.350 plastic 1.669 19.5 -0.49 9 flat (SPH) 0.010 Adhesion 1.485 53.2 10 Second plate flat 0.350 Glass 1.517 64.2 - 11 flat 0.010 Adhesion 1.485 53.2 12 Filter element flat 0.100 Glass 1.517 64.2 - 13 flat 0.030 14 Imaging surface flat - The reference wavelength (d-line) is 587.6 nm.

[0135] Table 3B, Aspheric Coefficients surface 4 6 7 8 k = -6.32549E-01 2.60452E-01 -9.41753E-01 -1.21753E+00 A4 = 4.4116E+00 -7.3700E+00 2.9376E+01 1.9184E+01 A6 = -1.3969E+02 3.7635E+02 -1.5092E+03 -8.3091E+02 A8 = 6.2760E+03 -1.1972E+04 9.3481E+04 3.1285E+04 A10 = -8.9412E+04 9.4671E+04 -3.0289E+06 -7.6347E+05 A12 = 4.5632E+05 8.4413E+05 5.0900E+07 9.7148E+06 A14 = - - -3.3019E+08 -4.8835E+07

[0136] In the third embodiment, the equation of 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.

[0137] Table 3C, Polynomial Data f [millimeters] 0.43 f1 / R2 -1.84 Fno 4.50 R5 / R4 1.59 HFOV [degree] 70.0 R5 / R6 0.00 FOV [degree] 140.0 CT1 / CT2 0.45 TL / f 4.17 CT2 / CT3 1.08 ImgH / f 1.19 T12 / CT1 1.90 BL / TD 0.39 T23 / CT2 0.20 f / f1 -0.99 T23 / CT3 0.22 f / f3 -0.88 (CT2+CT3) / CT1 4.29 f / f12 2.07 ET3 / ET1 1.52 f / f1+f / f2+f / f3 -0.48 Y1R2 / Y2R1 1.46 f / R1+f / R6 0.00 SAG3R2 / CT3 0.00

[0138] <Fourth Embodiment>

[0139] Please refer to Figures 7 and 8, where Figure 7 shows a schematic diagram of the imaging device according to the fourth embodiment of this disclosure, and Figure 8, from left to right, shows the spherical aberration, astigmatism, and distortion curves of the fourth embodiment. As shown in Figure 7, the imaging device 4 includes a photographic optical lens (unlabeled) and an electronic image sensor IS. The photographic optical lens, along the optical path from the object side to the image side, includes a first plate E4, a first lens E1, an aperture ST, a second lens E2, a third lens E3, a second plate E5, a filter element E6, and an imaging surface IMG. The electronic image sensor IS is disposed on the imaging surface IMG. The photographic optical lens includes three lenses (E1, E2, E3), and there are no other interposed lenses between each lens.

[0140] The first plate E4 is made of glass and is positioned between the object being photographed and the first lens E1, without affecting the focal length of the photographic optical lens.

[0141] The first lens E1 has negative refractive power and is made of plastic. Its object-side surface is flat near the optical axis, its image-side surface is concave near the optical axis, its object-side surface is spherical, its image-side surface is aspherical, and its object-side surface is bonded to the first plate E4.

[0142] The second lens E2 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.

[0143] The third lens E3 has negative refractive power and is made of plastic. Its object-side surface is concave near the optical axis, its image-side surface is flat near the optical axis, its object-side surface is aspherical, its image-side surface is spherical, and its image-side surface is bonded to the second plate E5.

[0144] The second plate E5 is made of glass and is located between the third lens E3 and the imaging surface IMG. It does not affect the focal length of the photographic optical lens.

[0145] The filter element E6 is made of glass and is disposed between the second plate E5 and the imaging surface IMG, without affecting the focal length of the photographic optical lens. The filter element E6 is bonded to the second plate E5.

[0146] Please refer to Table 4A and Table 4B below.

[0147] Table 4A, Fourth Embodiment f (focal length) = 0.42 mm, fno (aperture value) = 4.50, HFOV (half angle of view) = 69.4 degrees surface radius of curvature thickness Material Refractive index Abbe number focal length 0 Subject unlimited 10.000 1 First Tablet flat 0.200 Glass 1.517 64.2 - 2 flat 0.010 Adhesion 1.485 53.2 3 First lens flat (SPH) 0.175 plastic 1.544 56.0 -0.51 4 0.2757 (ASP) 0.326 5 aperture flat 0.035 6 Second lens 0.4061 (ASP) 0.427 plastic 1.544 56.0 0.25 7 -0.1326 (ASP) 0.050 8 Third lens -0.1860 (ASP) 0.501 plastic 1.671 19.5 -0.28 9 flat (SPH) 0.010 Adhesion 1.485 53.2 10 Second plate flat 0.200 Glass 1.517 64.2 - 11 flat 0.010 Adhesion 1.485 53.2 12 Filter element flat 0.100 Glass 1.517 64.2 - 13 flat 0.032 14 Imaging surface flat - The reference wavelength (d-line) is 587.6 nm.

[0148] Table 4B, Aspheric Coefficient surface 4 6 7 8 k = -6.86815E-01 7.35893E+00 -1.12501E+00 -4.16719E+00 A4 = -6.0694E+00 -2.1606E+01 7.2746E+01 2.1846E+01 A6 = 4.8466E+02 2.8492E+03 -3.5425E+03 -1.5387E+03 A8 = -1.7097E+04 -7.0132E+05 1.0921E+05 4.7456E+04 A10 = 2.6259E+05 5.2793E+07 -1.7392E+06 -7.7683E+05 A12 = -1.4091E+06 -1.4704E+09 1.0667E+07 4.9287E+06

[0149] In the fourth embodiment, the equation of the curve of the aspherical surface is expressed in the form of the first embodiment. In addition, the definitions described in Table 4C below are the same as those in the first embodiment, and will not be repeated here.

[0150] Table 4C, Polynomial Data f [millimeters] 0.42 f1 / R2 -1.84 Fno 4.50 R5 / R4 1.40 HFOV [degree] 69.4 R5 / R6 0.00 FOV [degree] 138.8 CT1 / CT2 0.41 TL / f 4.45 CT2 / CT3 0.85 ImgH / f 1.22 T12 / CT1 2.06 BL / TD 0.23 T23 / CT2 0.12 f / f1 -0.83 T23 / CT3 0.10 f / f3 -1.51 (CT2+CT3) / CT1 5.30 f / f12 2.93 ET3 / ET1 2.13 f / f1+f / f2+f / f3 -0.69 Y1R2 / Y2R1 1.86 f / R1+f / R6 0.00 SAG3R2 / CT3 0.00

[0151] <Fifth Implementation Example>

[0152] Please refer to Figures 9 and 10, where Figure 9 shows a schematic diagram of the imaging device according to the fifth embodiment of this disclosure, and Figure 10 shows the spherical aberration, astigmatism, and distortion curves of the fifth embodiment from left to right. As shown in Figure 9, the imaging device 5 includes a photographic optical lens (unlabeled) and an electronic image sensor IS. The photographic optical lens includes, in sequence from the object side to the image side along the optical path, a first plate E4, a first lens E1, an aperture ST, a second lens E2, a third lens E3, a second plate E5, a filter element E6, and an imaging surface IMG. The electronic image sensor IS is disposed on the imaging surface IMG. The photographic optical lens includes three lenses (E1, E2, E3), and there are no other interposed lenses between each lens.

[0153] The first plate E4 is made of glass and is positioned between the object being photographed and the first lens E1, without affecting the focal length of the photographic optical lens.

[0154] The first lens E1 has negative refractive power and is made of glass. Its object-side surface is flat near the optical axis, its image-side surface is concave near the optical axis, its object-side surface is spherical, its image-side surface is aspherical, and its object-side surface is bonded to the first plate E4.

[0155] The second lens E2 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.

[0156] The third lens E3 has negative refractive power and is made of plastic. Its object-side surface is concave near the optical axis, its image-side surface is flat near the optical axis, its object-side surface is aspherical, its image-side surface is spherical, and its image-side surface is bonded to the second plate E5.

[0157] The second plate E5 is made of glass and is located between the third lens E3 and the imaging surface IMG. It does not affect the focal length of the photographic optical lens.

[0158] The filter element E6 is made of glass and is disposed between the second plate E5 and the imaging surface IMG, without affecting the focal length of the photographic optical lens. The filter element E6 is bonded to the second plate E5.

[0159] Please refer to Table 5A and Table 5B below.

[0160] Table 5A, Fifth Embodiment f (focal length) = 0.63 mm, Fno (aperture value) = 4.00, HFOV (half angle of view) = 68.7 degrees surface radius of curvature thickness Material Refractive index Abbe number focal length 0 Subject unlimited 10.000 1 First Tablet flat 0.200 Glass 1.517 64.2 - 2 flat 0.010 Adhesion 1.485 53.2 3 First lens flat (SPH) 0.157 Glass 1.516 56.8 -2.47 4 1.2750 (ASP) 0.299 5 aperture flat 0.046 6 Second lens 0.5619 (ASP) 0.312 plastic 1.544 56.0 0.30 7 -0.1868 (ASP) 0.094 8 Third lens -0.2268 (ASP) 0.180 plastic 1.697 16.3 -0.33 9 flat (SPH) 0.010 Adhesion 1.485 53.2 10 Second plate flat 0.300 Glass 1.517 64.2 - 11 flat 0.010 Adhesion 1.485 53.2 12 Filter element flat 0.100 Glass 1.517 64.2 - 13 flat 0.073 14 Imaging surface flat - The reference wavelength (d-line) is 587.6 nm.

[0161] Table 5B, Aspherical Coefficient surface 4 6 7 8 k = -4.34847E+01 -2.78062E+00 -7.10854E-01 -2.42587E+00 A4 = 8.1138E+00 -4.4590E+00 2.3166E+01 2.5116E+01 A6 = -5.7793E+01 -8.3352E+00 1.5474E+01 -6.3188E+02 A8 = 6.9810E+02 3.3433E+03 -5.7464E+03 1.1730E+04 A10 = -4.3878E+03 -2.7896E+05 7.1681E+04 -1.6923E+05 A12 = 2.4750E+04 3.3735E+06 -3.2549E+05 1.3447E+06 A14 = - - -2.0323E+06 -4.8707E+06

[0162] In the fifth embodiment, the equation of the curve of the aspherical surface is expressed in the form of the first embodiment. In addition, the definitions described in Table 5C below are the same as those in the first embodiment, and will not be repeated here.

[0163] Table 5C, Polynomial Data f [millimeters] 0.63 f1 / R2 -1.94 Fno 4.00 R5 / R4 1.21 HFOV [degree] 68.7 R5 / R6 0.00 FOV [degree] 137.4 CT1 / CT2 0.50 TL / f 2.50 CT2 / CT3 1.73 ImgH / f 0.81 T12 / CT1 2.20 BL / TD 0.45 T23 / CT2 0.30 f / f1 -0.26 T23 / CT3 0.52 f / f3 -1.95 (CT2+CT3) / CT1 3.13 f / f12 2.28 ET3 / ET1 1.18 f / f1+f / f2+f / f3 -0.11 Y1R2 / Y2R1 1.65 f / R1+f / R6 0.00 SAG3R2 / CT3 0.00

[0164] <Sixth Implementation Example>

[0165] Please refer to Figures 11 and 12, where Figure 11 is a schematic diagram of an image-capturing device according to the sixth embodiment of this disclosure, and Figure 12 shows, from left to right, the spherical aberration, astigmatism, and distortion curves of the sixth embodiment. As shown in Figure 11, the image-capturing device 6 includes a photographic optical lens (unlabeled) and an electronic image sensor IS. The photographic optical lens, along the optical path from the object side to the image side, includes a first lens E1, an aperture ST, a second lens E2, a third lens E3, a filter element E6, and an imaging plane IMG. The electronic image sensor IS is disposed on the imaging plane IMG. The photographic optical lens includes three lenses (E1, E2, E3), and there are no other interleaved lenses between each lens.

[0166] The first lens E1 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.

[0167] The second lens E2 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.

[0168] The third lens E3 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 convex near the optical axis. Both of its surfaces are aspherical.

[0169] The filter element E6 is made of glass and is located between the third lens E3 and the imaging surface IMG. It does not affect the focal length of the photographic optical lens.

[0170] Please refer to Table 6A and Table 6B below.

[0171] Table 6A, Sixth Embodiment f (focal length) = 0.42 mm, fno (aperture value) = 3.70, HFOV (half angle of view) = 76.0 degrees surface radius of curvature thickness Material Refractive index Abbe number focal length 0 Subject unlimited 20,000 1 First lens -9.8213 (ASP) 0.143 plastic 1.534 56.0 -0.60 2 0.3323 (ASP) 0.461 3 aperture flat 0.067 4 Second lens 0.3699 (ASP) 0.336 plastic 1.544 56.0 0.34 5 -0.2527 (ASP) 0.110 6 Third lens -0.2998 (ASP) 0.268 plastic 1.697 16.3 -0.59 7 -1.4846 (ASP) 0.150 8 Filter element flat 0.100 Glass 1.517 64.2 - 9 flat 0.139 10 Imaging surface flat - The reference wavelength (d-line) is 587.6 nm.

[0172] Table 6B, Aspherical Coefficients surface 1 2 4 5 6 7 k = -9.63042E+01 -9.58655E-01 -9.58098E-01 -7.90378E-01 -1.68259E+00 -9.90000E+01 A4 = 1.2710E-02 5.4523E+00 -3.0031E+00 1.8239E+01 2.8640E+01 1.0470E+01 A6 = 4.6288E+00 -9.4771E+01 1.3682E+02 -3.3965E+02 -1.0912E+03 -1.6071E+02 A8 = -4.1264E+01 4.8188E+03 -5.9345E+03 6.7962E+03 2.6059E+04 1.5396E+03 A10 = 1.6620E+02 -6.9616E+04 1.2632E+05 -1.2800E+05 -5.2687E+05 -1.0780E+04 A12 = -3.3066E+02 4.2731E+05 -1.1960E+06 1.4186E+06 6.3876E+06 5.2523E+04 A14 = 2.6418E+02 - - -7.2986E+06 -3.9565E+07 -1.2334E+05

[0173] In the sixth embodiment, the equation of the curve of the aspherical surface is expressed in the form of the first embodiment. Furthermore, the definitions described in Table 6C below are the same as in the first embodiment, and will not be repeated here.

[0174] Table 6C, Polynomial Data f [millimeters] 0.42 f1 / R2 -1.80 Fno 3.70 R5 / R4 1.19 HFOV [degree] 76.0 R5 / R6 0.20 FOV [degree] 152.0 CT1 / CT2 0.43 TL / f 4.25 CT2 / CT3 1.25 ImgH / f 1.28 T12 / CT1 3.69 BL / TD 0.28 T23 / CT2 0.33 f / f1 -0.70 T23 / CT3 0.41 f / f3 -0.70 (CT2+CT3) / CT1 4.22 f / f12 1.94 ET3 / ET1 1.17 f / f1+f / f2+f / f3 -0.18 Y1R2 / Y2R1 1.37 f / R1+f / R6 -0.32 SAG3R2 / CT3 0.04

[0175] <Seventh Embodiment>

[0176] Please refer to Figures 13 and 14, where Figure 13 illustrates a schematic diagram of the imaging device according to the seventh embodiment of this disclosure, and Figure 14 shows, from left to right, the spherical aberration, astigmatism, and distortion curves of the seventh embodiment. As shown in Figure 13, the imaging device 7 includes a photographic optical lens (unlabeled) and an electronic image sensor IS. The photographic optical lens, along the optical path from the object side to the image side, includes a first plate E4, a first lens E1, an aperture ST, a second lens E2, a third lens E3, a second plate E5, a filter element E6, and an imaging surface IMG. The electronic image sensor IS is disposed on the imaging surface IMG. The photographic optical lens includes three lenses (E1, E2, E3), and there are no other interposed lenses between each lens.

[0177] The first plate E4 is made of glass and is positioned between the object being photographed and the first lens E1, without affecting the focal length of the photographic optical lens.

[0178] The first lens E1 has negative refractive power and is made of glass. Its object-side surface is flat near the optical axis, its image-side surface is concave near the optical axis, its object-side surface is spherical, its image-side surface is aspherical, and its object-side surface is bonded to the first plate E4.

[0179] The second lens E2 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.

[0180] The third lens E3 has negative refractive power and is made of plastic. Its object-side surface is concave near the optical axis, its image-side surface is flat near the optical axis, its object-side surface is aspherical, its image-side surface is spherical, and its image-side surface is bonded to the second plate E5.

[0181] The second plate E5 is made of glass and is located between the third lens E3 and the imaging surface IMG. It does not affect the focal length of the photographic optical lens.

[0182] The filter element E6 is made of glass and is disposed between the second plate E5 and the imaging surface IMG, without affecting the focal length of the photographic optical lens. The filter element E6 is bonded to the second plate E5.

[0183] Please refer to Table 7A and Table 7B below.

[0184] Table 7A, Seventh Embodiment f (focal length) = 0.57 mm, fno (aperture value) = 3.80, HFOV (half angle of view) = 65.1 degrees surface radius of curvature thickness Material Refractive index Abbe number focal length 0 Subject unlimited 8.000 1 First Tablet flat 0.200 Glass 1.517 64.2 - 2 flat 0.010 Adhesion 1.485 53.2 3 First lens flat (SPH) 0.150 Glass 1.523 58.7 -1.13 4 0.5910 (ASP) 0.407 5 aperture flat 0.058 6 Second lens 0.8333 (ASP) 0.314 plastic 1.544 56.0 0.41 7 -0.2617 (ASP) 0.232 8 Third lens -0.4206 (ASP) 0.150 plastic 1.697 16.3 -0.60 9 flat (SPH) 0.010 Adhesion 1.485 53.2 10 Second plate flat 0.350 Glass 1.517 64.2 - 11 flat 0.010 Adhesion 1.485 53.2 12 Filter element flat 0.100 Glass 1.517 64.2 - 13 flat 0.053 14 Imaging surface flat - The reference wavelength (d-line) is 587.6 nm.

[0185] Table 7B, Aspherical Coefficients surface 4 6 7 8 k = -1.58782E+00 -1.93960E+01 -7.06250E-01 -7.64577E-01 A4 = 4.2164E+00 -4.1738E+00 2.5891E+00 5.5955E+00 A6 = -9.5912E+00 -1.7613E+02 -1.5805E+02 -1.7461E+01 A8 = 4.3799E+02 6.4760E+03 6.6280E+03 -1.9922E+03 A10 = -4.2422E+03 -2.4204E+05 -2.0582E+05 5.3439E+04 A12 = 2.3634E+04 -1.6068E+06 2.9197E+06 -6.7418E+05 A14 = - - -1.7948E+07 3.1593E+06

[0186] In the seventh embodiment, the equation of the curve of the aspherical surface is expressed in the form of the first embodiment. In addition, the definitions described in Table 7C below are the same as those in the first embodiment, and will not be repeated here.

[0187] Table 7C, Polynomial Data f [millimeters] 0.57 f1 / R2 -1.91 Fno 3.80 R5 / R4 1.61 HFOV [degree] 65.1 R5 / R6 0.00 FOV [degree] 130.2 CT1 / CT2 0.48 TL / f 3.24 CT2 / CT3 2.09 ImgH / f 0.90 T12 / CT1 3.10 BL / TD 0.40 T23 / CT2 0.74 f / f1 -0.50 T23 / CT3 1.55 f / f3 -0.94 (CT2+CT3) / CT1 3.09 f / f12 1.67 ET3 / ET1 0.89 f / f1+f / f2+f / f3 -0.05 Y1R2 / Y2R1 1.75 f / R1+f / R6 0.00 SAG3R2 / CT3 0.00

[0188] <Eighth Implementation Example>

[0189] Please refer to Figures 15 and 16, where Figure 15 shows a schematic diagram of the imaging device according to the eighth embodiment of this disclosure, and Figure 16, from left to right, shows the spherical aberration, astigmatism, and distortion curves of the eighth embodiment. As shown in Figure 15, the imaging device 8 includes a photographic optical lens (unlabeled) and an electronic image sensor IS. The photographic optical lens, along the optical path from the object side to the image side, includes a first plate E4, a first lens E1, an aperture ST, a second lens E2, a third lens E3, a second plate E5, a filter element E6, and an imaging surface IMG. The electronic image sensor IS is disposed on the imaging surface IMG. The photographic optical lens includes three lenses (E1, E2, E3), and there are no other interposed lenses between each lens.

[0190] The first plate E4 is made of glass and is positioned between the object being photographed and the first lens E1, without affecting the focal length of the photographic optical lens.

[0191] The first lens E1 has negative refractive power and is made of plastic. Its object-side surface is flat near the optical axis, its image-side surface is concave near the optical axis, its object-side surface is spherical, its image-side surface is aspherical, and its object-side surface is bonded to the first plate E4.

[0192] The second lens E2 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.

[0193] The third lens E3 has negative refractive power and is made of glass. Its object-side surface is concave near the optical axis, its image-side surface is flat near the optical axis, its object-side surface is aspherical, its image-side surface is spherical, and its image-side surface is bonded to the second plate E5.

[0194] The second plate E5 is made of glass and is located between the third lens E3 and the imaging surface IMG. It does not affect the focal length of the photographic optical lens.

[0195] The filter element E6 is made of glass and is disposed between the second plate E5 and the imaging surface IMG, without affecting the focal length of the photographic optical lens. The filter element E6 is bonded to the second plate E5.

[0196] Please refer to Table 8A and Table 8B below.

[0197] Table 8A, Eighth Embodiment f (focal length) = 0.55 mm, Fno (aperture value) = 4.70, HFOV (half angle of view) = 70.1 degrees surface radius of curvature thickness Material Refractive index Abbe number focal length 0 Subject unlimited 20,000 1 First Tablet flat 0.100 Glass 1.517 64.2 - 2 flat 0.010 Adhesion 1.485 53.2 3 First lens flat (SPH) 0.216 Glass 1.587 28.3 -0.93 4 0.5467 (ASP) 0.324 5 aperture flat 0.034 6 Second lens 0.4060 (ASP) 0.280 plastic 1.534 56.0 0.31 7 -0.2071 (ASP) 0.110 8 Third lens -0.2626 (ASP) 0.150 plastic 1.699 30.1 -0.38 9 flat (SPH) 0.010 Adhesion 1.485 53.2 10 Second plate flat 0.300 Glass 1.517 64.2 - 11 flat 0.010 Adhesion 1.485 53.2 12 Filter element flat 0.100 Glass 1.517 64.2 - 13 flat 0.092 14 Imaging surface flat - The reference wavelength (d-line) is 587.6 nm.

[0198] Table 8B, Aspheric Coefficient surface 4 6 7 8 k = 1.02072E+00 -1.07166E+00 -5.79776E-01 -1.20383E+00 A4 = 4.9250E+00 -2.1079E+00 1.5877E+01 2.0489E+01 A6 = -3.3315E+01 -9.5451E+02 3.1449E+02 -3.9737E+02 A8 = 1.9174E+03 1.0717E+05 -3.0852E+04 -1.1632E+03 A10 = -3.0546E+04 -5.5236E+06 1.1898E+06 2.3135E+05 A12 = 2.2885E+05 1.0093E+08 -2.5080E+07 -6.1719E+06 A14 = - - 2.0517E+08 4.4844E+07

[0199] In the eighth embodiment, the equation of the curve of the aspherical surface is expressed in the form of the first embodiment. In addition, the definitions described in Table 8C below are the same as those in the first embodiment, and will not be repeated here.

[0200] Table 8C, Polynomial Data f [millimeters] 0.55 f1 / R2 -1.70 Fno 4.70 R5 / R4 1.27 HFOV [degree] 70.1 R5 / R6 0.00 FOV [degree] 140.2 CT1 / CT2 0.77 TL / f 2.94 CT2 / CT3 1.87 ImgH / f 0.89 T12 / CT1 1.66 BL / TD 0.46 T23 / CT2 0.39 f / f1 -0.59 T23 / CT3 0.73 f / f3 -1.47 (CT2+CT3) / CT1 1.99 f / f12 2.20 ET3 / ET1 0.73 f / f1+f / f2+f / f3 -0.25 Y1R2 / Y2R1 1.82 f / R1+f / R6 0.00 SAG3R2 / CT3 0.00

[0201] <Ninth Implementation Example>

[0202] Please refer to FIG17, which is a perspective view of an image capturing device according to the ninth embodiment of the present 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 lens of the first embodiment described above, a lens barrel (not otherwise labeled) for supporting the photographic optical lens, and a support device (Holder Member, not otherwise labeled). The imaging lens 101 may also be replaced with a photographic optical lens of other embodiments described above, and the present 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.

[0203] The driving device 102 may have an auto-focus function, and its driving method may use a driving system such as a voice coil motor (VCM), micro-electro-mechanical systems (MEMS), piezoelectric systems, and shape memory alloys. The driving device 102 enables the imaging lens 101 to achieve a better imaging position, and can provide clear images 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) set on the imaging surface of the photographic optical lens, which can truly present the good image quality of the photographic optical lens.

[0204] The image stabilization module 104 is, for example, an accelerometer, a gyroscope, or a Hall effect sensor. The drive unit 102 can work together 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) function, further improving the imaging quality of shooting in dynamic and low-light scenes.

[0205] <Tenth Embodiment>

[0206] Please refer to Figures 18 to 20, wherein Figure 18 shows a perspective view of one side of an electronic device according to the tenth embodiment of the present disclosure, Figure 19 shows a perspective view of the other side of the electronic device of Figure 18, and Figure 20 shows a system block diagram of the electronic device of Figure 19.

[0207] In this embodiment, the electronic device 200 is a smartphone. The electronic device 200 includes the image capturing device 100, image capturing device 100a, image capturing device 100b, image capturing device 100c, image capturing device 100d, image capturing device 100e, flash module 201, focus assist module 202, image signal processor 203, display module 204, and image software processor 205 as described in the ninth embodiment. 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 be a laser ranging or 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, allowing image capturing devices 100c, 100d, and 100e to function as front-facing cameras 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 lens disclosed herein and can all have a structural configuration similar to that of image capturing device 100. In detail, each of the image capturing devices 100a, 100b, 100c, 100d, and 100e may include an imaging lens, a driving device, an electronic photosensitive element, and an image stabilization module, and each may include an optical path reversing element to reversing the optical path. The imaging lens of each of the image capturing devices 100a, 100b, 100c, 100d, and 100e may include, for example, a photographic optical lens as disclosed herein, a lens barrel for supporting the photographic optical lens, and a supporting device.

[0208] 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 structure similar to Figures 27 to 29, which can be referred to in the description corresponding to Figures 27 to 29 above, and 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 a structure similar to that of Figures 27 to 29, as described above with reference to the descriptions corresponding to Figures 27 to 29. 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.

[0209] 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 focus the light and activate the flash module 201 for supplemental lighting. It also uses the subject distance information provided by the focus assist module 202 for fast focusing, and the image signal processor 203 performs image optimization processing to further improve the image quality produced by the photographic lens. The focus assist module 202 can use an infrared or laser focus assist system to achieve fast focusing. In addition, 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 and utilize 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.

[0210] <Eleventh Embodiment>

[0211] Please refer to Figures 21 and 22, wherein Figure 21 shows a schematic diagram of one side of an electronic device according to the eleventh embodiment of the present disclosure, and Figure 22 shows a schematic diagram of the other side of the electronic device of Figure 21.

[0212] In this embodiment, the electronic device 300 is a smartphone. The electronic device 300 includes the image capturing device 100, image capturing device 100f, image capturing device 100g, image capturing device 100h, and display module 301 of the ninth embodiment. As shown in FIG21, the image capturing devices 100, 100f, and 100g are all disposed on the same side of the electronic device 300 and are all single-focus. As shown in FIG22, the image capturing device 100h and the display module 301 are both disposed on the other side of the electronic device 300. The image capturing device 100h can serve as a front-facing camera 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 lens 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 may include an imaging lens, a driving device, an electronic photosensitive element, and an image stabilization module. The imaging lens of each of the image capturing devices 100f, 100g, and 100h may include, for example, a photographic optical lens as disclosed herein, a lens barrel for supporting the photographic optical lens, and a support device.

[0213] 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.

[0214] <Twelfth Embodiment>

[0215] Please refer to FIG23, which is a perspective view of one side of an electronic device according to the twelfth embodiment of the present disclosure.

[0216] In this embodiment, the electronic device 400 is a smartphone. The electronic device 400 includes the image capturing devices 100, 100i, 100j, 100k, 100m, 100n, 100p, 100q, and 100r of the ninth embodiment, a flash module 401, a focus assist module, an image signal processor, a display module, and an image software processor (not shown). The image capturing devices 100, 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 image capturing devices 100i, 100j, 100k, 100m, 100n, 100p, 100q, and 100r may all include the photographic optical lens disclosed herein and may all have a structural configuration similar to that of the image capturing device 100, which will not be elaborated further here.

[0217] 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 magnifications to achieve optical zoom shooting effects. Furthermore, the image capturing device 100r can acquire depth information of the image. The optical path reversal configuration of the image capturing devices 100i and 100j can, for example, have a structure similar to that shown in Figures 27 to 29, as described above with reference to the corresponding figures 27 to 29, and will not be repeated here. The electronic device 400 described above 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 takes a picture of a subject, the electronic device 400 uses the image capturing devices 100, 100i, 100j, 100k, 100m, 100n, 100p, 100q, or 100r to focus the light and capture the image, activates the flash module 401 to provide supplementary lighting, and performs subsequent processing in a manner similar to the aforementioned embodiments, which will not be described in detail here.

[0218] <Thirteenth Embodiment>

[0219] Please refer to FIG24, which is a cross-sectional schematic diagram of an electronic device according to the thirteenth embodiment of the present disclosure.

[0220] In this embodiment, the electronic device 500 is a capsule endoscope. The electronic device 500 includes a housing 501, a plurality of batteries 502, a plurality of light-emitting diodes 503, an image-capturing device 100 of the ninth embodiment, and a radio transmitter 504. The batteries 502, the light-emitting diodes 503, the image-capturing device 100, and the radio transmitter 504 are disposed within the housing 501. The imaging lens 101 of the image-capturing device 100 is disposed on one side of the light-emitting diodes 503. Furthermore, the electronic photosensitive element 103 of the image-capturing device 100 is, for example, a CMOS sensor. The batteries 502 supply power to the light-emitting diodes 503, the image-capturing device 100, and the radio transmitter 504. These light-emitting diodes 503 emit light towards the subject, enabling the imaging device 100 to capture a clear image. The image is then converted into an image signal, which is transmitted via a radio transmitter 504 to a location outside the human body. A radio receiving antenna (not shown) located outside the body receives the image signal, which can then be displayed on a monitor (not shown). The imaging device 100 can capture images within a range where the subject is at a distance of, for example, less than or equal to 30 millimeters.

[0221] <Fourteenth Embodiment>

[0222] Please refer to FIG25, which is a perspective view of an electronic device according to the fourteenth embodiment of the present disclosure.

[0223] In this embodiment, the electronic device 600 is a nasopharyngeal endoscope. The electronic device 600 includes a body 601, a first cable 602, an image-capturing device 100 of the ninth embodiment, and a second cable 603. One end of the first cable 602 is electrically connected to the body 601, and the image-capturing device 100 is disposed at the other end of the first cable 602. The image-capturing device 100 can capture images within a range where the distance to the subject is, for example, less than or equal to 30 mm. One end of the second cable 603 is electrically connected to the body 601, and the other end of the second cable 603 is electrically connected to a display 700, but this disclosure is not limited thereto. The electronic device 600 captures a clear image through the image-capturing device 100, converts the image into an image signal, and then transmits the image signal to the display 700 through the first cable 602 and the second cable 603, so that the display 700 displays the image of the subject.

[0224] The image capturing device disclosed herein is not limited to applications in the aforementioned smartphones and endoscopes. The image capturing device can also be applied to mobile focusing systems as needed, and features excellent aberration correction and good image quality. For example, the image capturing device can be widely used in 3D image capture, digital cameras, mobile products, digital tablets, smart TVs, network monitoring equipment, dashcams, reversing cameras, multi-lens devices, recognition systems, motion-sensing game consoles, drones, wearable products, personal video recorders, various medical endoscopes, industrial endoscopes, and capsule lenses, among other electronic devices. 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.

[0225] Although this disclosure is made above with reference to the preferred embodiments described above, it is not intended to limit this disclosure. Anyone 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 scope of the claims attached to this specification. [Simplified Explanation of the Diagram]

[0029] Figure 1 illustrates a schematic diagram of an imaging device according to a first embodiment of the present disclosure. Figure 2, from left to right, are graphs showing spherical aberration, astigmatism, and distortion of the first embodiment. Figure 3 illustrates a schematic diagram of an imaging device according to a second embodiment of the present disclosure. Figure 4, from left to right, are graphs showing spherical aberration, astigmatism, and distortion of the second embodiment. Figure 5 illustrates a schematic diagram of an imaging device according to a third embodiment of the present disclosure. Figure 6, from left to right, are graphs showing spherical aberration, astigmatism, and distortion of the third embodiment. Figure 7 illustrates a schematic diagram of an imaging device according to a fourth embodiment of the present disclosure. Figure 8, from left to right, are graphs showing spherical aberration, astigmatism, and distortion of the fourth embodiment. Figure 9 illustrates a schematic diagram of an imaging device according to a fifth embodiment of the present disclosure. Figure 10, from left to right, are graphs showing spherical aberration, astigmatism, and distortion of the fifth embodiment. Figure 11 illustrates a schematic diagram of an imaging device according to a sixth embodiment of the present disclosure. Figure 12, from left to right, are graphs showing spherical aberration, astigmatism, and distortion of the sixth embodiment. Figure 13 illustrates a schematic diagram of an imaging device according to a seventh embodiment of the present disclosure. Figure 14, from left to right, shows the spherical aberration, astigmatism, and distortion curves of the seventh embodiment. Figure 15 shows a schematic diagram of the imaging device according to the eighth embodiment of this disclosure. Figure 16, from left to right, shows the spherical aberration, astigmatism, and distortion curves of the eighth embodiment. Figure 17 shows a schematic diagram of the imaging device according to the ninth embodiment of this disclosure. Figure 18 shows a perspective view of one side of an electronic device according to the tenth embodiment of this disclosure. Figure 19 shows a perspective view of the other side of the electronic device of Figure 18. Figure 20 shows a system block diagram of the electronic device of Figure 18. Figure 21 shows a schematic diagram of one side of an electronic device according to the eleventh embodiment of this disclosure. Figure 22 shows a schematic diagram of the other side of the electronic device of Figure 21. Figure 23 shows a perspective view of one side of an electronic device according to the twelfth embodiment of this disclosure. Figure 24 shows a cross-sectional schematic diagram of an electronic device according to the thirteenth embodiment of this disclosure. Figure 25 shows a perspective view of an electronic device according to the fourteenth embodiment of this disclosure. Figure 26 illustrates a schematic diagram of parameters Y1R2, Y2R1, ET1, ET3, and SAG3R2 according to the second embodiment of this disclosure. Figure 27 illustrates a schematic diagram of one configuration of an optical path reversing element according to this disclosure in a photographic optical lens. Figure 28 illustrates a schematic diagram of another configuration of an optical path reversing element according to this disclosure in a photographic optical lens. Figure 29 illustrates a schematic diagram of one configuration of two optical path reversing elements according to this disclosure in a photographic optical lens.

Claims

1. A photographic optical lens comprising three lenses, which are sequentially arranged along the optical path from the object side to the image side as a first lens, a second lens, and a third lens, and each of the three lenses has an object-side surface facing the object side and an image-side surface facing the image side; wherein, The first lens has a concave image-side surface near the optical axis, the third lens has negative refractive power, and the photographic optical lens further includes an aperture located between the first and second lenses. The distance from the object-side surface of the first lens to an imaging plane along the optical axis is TL, the focal length of the photographic optical lens is f, the thickness of the first lens along the optical axis is CT1, the thickness of the second lens along the optical axis is CT2, the thickness of the third lens along the optical axis is CT3, the radius of curvature of the object-side surface of the third lens is R5, the radius of curvature of the image-side surface of the third lens is R6, the aperture value of the photographic optical lens is Fno, the maximum imaging height of the photographic optical lens is ImgH, the distance from the image-side surface of the third lens to the imaging plane along the optical axis is BL, and the distance from the object-side surface of the first lens to the image-side surface of the third lens along the optical axis is TD, satisfying the following conditions: 1.80 < TL / f < 5.10; 1.75 < (CT2+CT3) / CT1 < 6.50; 0.40 < CT2 / CT3 < 2.50; -1.20 < R5 / R6 < 0.39; 2.60 < Fno < 5.10; 0.65 < ImgH / f < 1.50; and 0.10 < BL / TD < 0.

60.

2. The photographic optical lens as claimed in claim 1, wherein the second lens has positive refractive power, the object-side surface of the second lens is convex near the optical axis, the image-side surface of the second lens is convex near the optical axis, and the object-side surface of the third lens is concave near the optical axis.

3. The photographic optical lens as described in claim 1, wherein the first lens has negative refractive power; and wherein, The distance between the second lens and the third lens on the optical axis is T23, and the thickness of the third lens on the optical axis is CT3, which satisfies the following condition: 0.03 < T23 / CT3 < 3.

00.

4. A photographic optical lens as claimed in claim 1, wherein the focal length of the photographic optical lens is f, the focal length of the first lens is f1, the focal length of the second lens is f2, the focal length of the third lens is f3, the thickness of the first lens on the optical axis is CT1, and the thickness of the second lens on the optical axis is CT2, which satisfies the following conditions: -1.50 < f / f1+f / f2+f / f3 < 0.20; and 0.15 < CT1 / CT2 < 1.

05.

5. The photographic optical lens as claimed in claim 1, wherein the maximum imaging height of the photographic optical lens is ImgH, the focal length of the photographic optical lens is f, the distance on the optical axis from the image-side surface of the third lens to the imaging surface is BL, and the distance on the optical axis from the object-side surface of the first lens to the image-side surface of the third lens is TD, which satisfies the following conditions: 0.81 ≤ ImgH / f ≤ 1.28; and 0.23 ≤ BL / TD ≤ 0.

46.

6. The photographic optical lens as claimed in claim 1, wherein the focal length of the photographic optical lens is f, the focal length of the third lens is f3, and the maximum angle of view in the photographic optical lens is FOV, which satisfies the following conditions: -3.00 < f / f3 < -0.30; and 128.0 degrees < FOV < 172.0 degrees.

7. The photographic optical lens as claimed in claim 1, wherein the distance between the first lens and the second lens on the optical axis is T12, and the thickness of the first lens on the optical axis is CT1, which satisfies the following condition: 1.20 < T12 / CT1 < 5.

00.

8. The photographic optical lens as claimed in claim 1, wherein at least one of the object-side surface of the first lens and the image-side surface of the third lens is planar at the near-optical axis.

9. The photographic optical lens as claimed in claim 1, wherein the displacement of the point where the image-side surface of the third lens intersects the optical axis to the position of the maximum effective radius of the image-side surface of the third lens parallel to the optical axis is SAG3R2, and the thickness of the third lens on the optical axis is CT3, which satisfies the following condition: -0.30 < SAG3R2 / CT3 < 0.

35.

10. An image capturing device, comprising: a photographic optical lens as described in claim 1; and an electronic photosensitive element disposed on the imaging surface of the photographic optical lens.

11. An electronic device comprising: an image capturing device as described in claim 10.

12. A photographic optical lens comprising three lenses, which are sequentially arranged along the optical path from the object side to the image side as a first lens, a second lens, and a third lens, and each of the three lenses has an object-side surface facing the object side and an image-side surface facing the image side; wherein, The third lens has negative refractive power; wherein, the distance on the optical axis from the object-side surface of the first lens to an imaging plane is TL, the focal length of the photographic optical lens is f, the combined focal length of the first lens and the second lens is f12, the thickness on the optical axis of the first lens is CT1, the thickness on the optical axis of the second lens is CT2, the thickness on the optical axis of the third lens is CT3, the distance on the optical axis between the first lens and the second lens is T12, 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 second lens is R4, the radius of curvature of the object-side surface of the third lens is R5, and the radius of curvature of the image-side surface of the third lens is R6, which satisfies the following conditions: 2.30 < TL / f < 4.80; 1.75 < (CT2+CT3) / CT1 < 6.50; 1.20 < T12 / CT1 < 4.20; 0.50 < R5 / R4 < 3.30; -0.60 < f / R1+f / R6 < 1.50; and 0.90 < f / f12 < 4.

00.

13. The photographic optical lens as claimed in claim 12, wherein the focal length of the photographic optical lens is f and the focal length of the first lens is f1, which satisfies the following condition: -1.50 < f / f1 < 0.

20.

14. The photographic optical lens as claimed in claim 12, wherein the distance between the second lens and the third lens on the optical axis is T23, and the thickness of the second lens on the optical axis is CT2, which satisfies the following condition: 0.03 < T23 / CT2 < 1.

00.

15. The photographic optical lens as claimed in claim 12, wherein the first lens has negative refractive power; and wherein, The focal length of the photographic optical lens is f, and the combined focal length of the first lens and the second lens is f12, which satisfies the following condition: 1.25 < f / f12 < 3.

30.

16. The photographic optical lens as described in claim 12, wherein the photographic optical lens is used for taking pictures within a range where the object distance to the subject is less than or equal to 30 mm; and wherein, The maximum field of view (FOV) in this photographic lens meets the following conditions: 125.0 degrees < FOV < 175.0 degrees.

17. The photographic optical lens as claimed in claim 12, wherein the radius of curvature of the object-side surface of the third lens is R5, the radius of curvature of the image-side surface of the third lens is R6, the distance between the second lens and the third lens on the optical axis is T23, and the thickness of the third lens on the optical axis is CT3, which satisfies the following conditions: -2.00 < R5 / R6 < 0.35; and 0.03 < T23 / CT3 < 3.

00.

18. The photographic optical lens as claimed in claim 12, wherein the distance on the optical axis from the image-side surface of the third lens to the imaging plane is BL, and the distance on the optical axis from the object-side surface of the first lens to the image-side surface of the third lens is TD, which satisfies the following condition: 0.10 < BL / TD < 0.

60.

19. A photographic optical lens as claimed in claim 12, wherein the focal length of the first lens is f1, the radius of curvature of the image-side surface of the first lens is R2, the thickness of the second lens on the optical axis is CT2, and the thickness of the third lens on the optical axis is CT3, which satisfy the following conditions: -3.50 < f1 / R2 < 0.00; and 0.55 < CT2 / CT3 < 2.

40.

20. The photographic optical lens as claimed in claim 12, wherein the maximum effective radius of the image-side surface of the first lens is Y1R2, the maximum effective radius of the object-side surface of the second lens is Y2R1, the distance from the position of the maximum effective radius of the object-side surface of the first lens to the position of the maximum effective radius of the image-side surface of the first lens parallel to the optical axis is ET1, and the distance from the position of the maximum effective radius of the object-side surface of the third lens to the position of the maximum effective radius of the image-side surface of the third lens parallel to the optical axis is ET3, which satisfies the following conditions: 0.95 < Y1R2 / Y2R1 < 2.00; and 0.50 < ET3 / ET1 < 2.

50.

21. A photographic optical lens as claimed in claim 12, wherein the distance on the optical axis from the object-side surface of the first lens to the imaging plane is TL, the focal length of the photographic optical lens is f, the combined focal length of the first lens and the second lens is f12, the thickness on the optical axis of the first lens is CT1, the thickness on the optical axis of the second lens is CT2, the thickness on the optical axis of the third lens is CT3, 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 second lens is R4, the radius of curvature of the object-side surface of the third lens is R5, the radius of curvature of the image-side surface of the third lens is R6, the aperture value of the photographic optical lens is Fno, and the distance between the first lens and the second lens on the optical axis is T12, which satisfies the following conditions: 2.50 ≤ TL / f ≤ 4.45; 1.99 ≤ (CT2+CT3) / CT1 ≤ 5.72; 0.85 ≤ CT2 / CT3 ≤ 2.09; -0.54 ≤ R5 / R6 ≤ 0.20; 3.30 ≤ Fno ≤ 4.70; 1.66 ≤ T12 / CT1 ≤ 3.85; 1.19 ≤ R5 / R4 ≤ 2.55; -0.32 ≤ f / R1+f / R6 ≤ 0.90; and 1.67 ≤ f / f12 ≤ 2.93.

Images