Optical lens system, image capturing device and electronic device

Abstract

An optical lens system, an image capturing device and an electronic device, the optical lens system including six lens elements including a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element and a sixth lens element from an object side to an image side. Each lens has an object-side surface facing the object side and an image-side surface facing the image side. The second lens element has an image-side surface being concave in a paraxial region thereof. The third lens element has positive refractive power. The fourth lens element has an image-side surface being concave in a paraxial region thereof. The sixth lens element has an image-side surface including at least one inflection point. When specific conditions are satisfied, high imaging quality can be provided.

Description

Technical Field

[0001] The present disclosure relates to an optical lens system and an imaging device, and particularly to a miniaturized optical lens system and an imaging device applied to an electronic device. Background Art

[0002] With the advancement of semiconductor process technology, the performance of electronic photosensitive elements has been improved, and pixels can reach smaller sizes. Therefore, an optical lens with high imaging quality has become an essential part. With the rapid development of technology, the application range of electronic devices equipped with an optical lens system is more extensive, and the requirements for optical lenses are also more diverse. Since it is difficult for conventional optical lenses to balance the requirements of imaging quality, manufacturing sensitivity, aperture size, volume, or viewing angle, the present disclosure provides an optical lens with high imaging quality to meet the requirements. Summary of the Invention

[0003] The optical lens system, imaging device, and electronic device provided by the present disclosure are configured with the lens surface shapes in the optical lens system, which is conducive to balancing the optical path adjustment and the volume of the optical lens system, providing high imaging quality and maintaining its miniaturization.

[0004] According to the present disclosure, an optical lens system is provided, which sequentially includes six lenses from the object side to the image side, and the six lenses from the object side to the image side are a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens. Each lens 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 second lens near the optical axis is concave. Preferably, the third lens has a positive refractive power. Preferably, the image side surface of the fourth lens near the optical axis is concave. Preferably, the image side surface of the sixth lens includes at least one inflection point. The focal length of the optical lens system is f, the focal length of the first lens is f1, the combined focal length of the first lens and the second lens is f12, the thickness of the first lens on the optical axis is CT1, the distance between the first lens and the second lens on the optical axis is T12, the radius of curvature of the image side surface of the fifth lens is R10, the radius of curvature of the object side surface of the sixth lens is R11, the distance on the optical axis from the object side surface of the first lens to the image side surface of the sixth lens is TD, and the distance on the optical axis from the object side surface of the first lens to an imaging surface is TL. Preferably, it satisfies the following conditions: 0.25 < (CT1 + T12) / TD < 0.40; 0.20 < R11 / R10 < 3.30; 6.00 < TL / f < 13.00; -1.60 < |R11| / f12 < -0.50; and -6.40 < f1 / CT1 < 0.00.

[0005] According to the present disclosure, an imaging device is provided, which includes the aforementioned optical lens system and an electronic photosensitive element, wherein the electronic photosensitive element is disposed on the imaging surface of the optical lens system.

[0006] According to the present disclosure, an electronic device is provided, which includes the aforementioned imaging device.

[0007] According to the present disclosure, an optical lens system is provided. The optical lens system sequentially includes six lenses from the object side to the image side, and the six lenses are a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens from the object side to the image side. Each lens 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 second lens is concave near the optical axis. Preferably, the third lens has a positive refractive power. Preferably, the object-side surface of the third lens is convex near the optical axis. Preferably, the image-side surface of the third lens is convex near the optical axis. Preferably, the image-side surface of the fourth lens is concave near the optical axis. Preferably, the object-side surface of the fifth lens is convex near the optical axis. Preferably, the image-side surface of the sixth lens includes at least one inflection point. Preferably, there is an air gap on the optical axis between any two adjacent lenses among the six lenses. The focal length of the optical lens system is f, the thickness of the first lens on the optical axis is CT1, the distance between the first lens and the second lens on the optical axis is T12, the distance between the second lens and the third lens on the optical axis is T23, the distance between the fourth lens and the fifth lens on the optical axis is T45, the radius of curvature of the image-side surface of the fifth lens is R10, the radius of curvature of the object-side surface of the sixth lens is R11, the distance from the object-side surface of the first lens to the image-side surface of the sixth lens on the optical axis is TD, and the distance from the object-side surface of the first lens to an imaging surface on the optical axis is TL. Preferably, the following conditions are satisfied: 0.22 < (CT1 + T12) / TD < 0.45; 0.20 < R11 / R10 < 1.50; 6.00 < TL / f < 13.00; and 0.04 < T45 / T23 < 1.10.

[0008] According to the present disclosure, an optical lens system is provided, which sequentially includes six lenses from the object side to the image side, and the six lenses are a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens from the object side to the image side. Each lens 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 second lens is concave near the optical axis. Preferably, the image-side surface of the third lens is convex near the optical axis. Preferably, the image-side surface of the fourth lens is concave near the optical axis. Preferably, the object-side surface of the fifth lens is convex near the optical axis. Preferably, the image-side surface of the sixth lens includes at least one inflection point. The focal length of the optical lens system is f, the focal length of the first lens is f1, the combined focal length of the first lens and the second lens is f12, the thickness of the first lens on the optical axis is CT1, the thickness of the sixth lens on the optical axis is CT6, the distance between the first lens and the second lens on the optical axis is T12, the radius of curvature of the object-side surface of the sixth lens is R11, the distance on the optical axis from the object-side surface of the first lens to the image-side surface of the sixth lens is TD, and the distance on the optical axis from the object-side surface of the first lens to an imaging surface is TL. Preferably, the following conditions are satisfied: 0.25 < (CT1 + T12) / TD < 0.40; -1.60 < |R11| / f12 < -0.50; 1.0 < f / CT1 < 2.3; -0.40 < f1 / TL < 0.00; and 10 < TD / CT6 < 21.

[0009] When (CT1 + T12) / TD satisfies the above conditions, the center thickness of the first lens and the distance between the first lens and the second lens can be controlled, which is beneficial to achieving a balance between adjusting the traveling direction of the light path and the volume of the lens group.

[0010] When R11 / R10 satisfies the above conditions, the ratio of the radius of curvature of the image-side surface of the fifth lens to the radius of curvature of the object-side surface of the sixth lens can be adjusted, which helps to improve astigmatism and chromatic aberration of magnification.

[0011] When TL / f satisfies the above conditions, it helps to achieve a balance between the overall refractive power and the volume of the optical lens system and effectively control its total length.

[0012] When |R11| / f12 satisfies the above conditions, the surface shape of the object-side surface of the sixth lens can be designed, which helps to correct the astigmatism of the optical lens system and reduce the stray light in the optical lens system.

[0013] When f1 / CT1 satisfies the above conditions, it helps to adjust the surface shape and refractive power of the object-side surface of the first lens to compress the volume, while reducing the generation of spherical aberration and improving the imaging quality.

[0014] When T45 / T23 meets the above conditions, the ratio of the distance between the fourth lens and the fifth lens and the distance between the second lens and the third lens can be controlled, which helps to reduce manufacturing sensitivity and correct aberrations.

[0015] When f / CT1 meets the above conditions, the ratio of the focal length of the optical lens system to the center thickness of the first lens can be effectively adjusted to compress the volume of the optical lens system.

[0016] When f1 / TL meets the above conditions, the refractive power of the first lens assists in balancing the total length of the optical lens system to avoid the total length being too long.

[0017] When TD / CT6 meets the above conditions, the volume of the optical lens system is compressed by changing the proportional relationship between the center thickness of the sixth lens and the length of the lens group. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1A A schematic diagram showing an image capturing device according to a first embodiment of the present disclosure is shown;

[0019] Figure 1B From left to right are the spherical aberration, astigmatism and distortion curves of the first embodiment;

[0020] Figure 2A A schematic diagram showing an image capturing device according to a second embodiment of the present disclosure is shown;

[0021] Figure 2B From left to right are the spherical aberration, astigmatism and distortion curves of the second embodiment;

[0022] Figure 3A A schematic diagram illustrating an image capturing device according to a third embodiment of the present disclosure;

[0023] Figure 3B From left to right are the spherical aberration, astigmatism and distortion curves of the third embodiment;

[0024] Figure 4A A schematic diagram illustrating an image capturing device according to a fourth embodiment of the present disclosure;

[0025] Figure 4B From left to right are the spherical aberration, astigmatism and distortion curves of the fourth embodiment;

[0026] Figure 5A A schematic diagram illustrating an imaging device according to a fifth embodiment of the present disclosure is shown;

[0027] Figure 5B From left to right are the spherical aberration, astigmatism and distortion curves of the fifth embodiment;

[0028] Fig. 6A A schematic diagram illustrating an imaging device according to a sixth embodiment of the present disclosure is shown;

[0029] Figure 6B From left to right are the spherical aberration, astigmatism and distortion curves of the sixth embodiment;

[0030] Fig. 7A A schematic diagram illustrating an imaging device according to a seventh embodiment of the present disclosure is shown;

[0031] Figure 7B From left to right are the spherical aberration, astigmatism and distortion curves of the seventh embodiment;

[0032] Fig. 8A A schematic diagram showing some parameters according to the first embodiment;

[0033] Figure 8B A schematic diagram showing the inflection points and critical points of each lens according to the first embodiment;

[0034] Fig. 9 A three-dimensional schematic diagram of an imaging device according to an eighth embodiment of the present disclosure is shown;

[0035] Fig.10 A schematic diagram showing one side of an electronic device according to a ninth embodiment of the present disclosure;

[0036] Fig.11 A schematic diagram showing one side of an electronic device according to a tenth embodiment of the present disclosure;

[0037] Fig. 12A A schematic diagram showing one side of an electronic device according to an eleventh embodiment of the present disclosure;

[0038] Fig. 12B Draw according to Fig. 12A A schematic diagram of the other side of the electronic device;

[0039] Fig.13 A three-dimensional schematic diagram of an electronic device according to a twelfth embodiment of the present disclosure is shown;

[0040] Fig.14 A three-dimensional schematic diagram of an electronic device according to a thirteenth embodiment of the present disclosure is shown;

[0041] Fig.15 A top view of a vehicle tool according to a fourteenth embodiment of the present disclosure is shown;

[0042] Fig.16A A schematic diagram showing a configuration relationship of an optical path turning element in an optical lens system according to the present disclosure;

[0043] Fig. 16B A schematic diagram showing another configuration relationship of the light path turning element in the optical lens system according to the present disclosure; and

[0044] Fig. 16C A schematic diagram showing a configuration relationship of two optical path turning elements in an optical lens system according to the present disclosure is shown.

[0045]

Explanation of symbols

[0046] 200,300,400,500,600:Electronic devices

[0047] 201,301: Flash module

[0048] 404: User Interface

[0049] 507:Ontology

[0050] 1,2,3,4,5,6,7,100,210,220,230,310,320,330,340,350,360,370,380,390,410,420,430,440,510,520,610,710: Imaging device

[0051] 101: Imaging Lens

[0052] 102: Driving device

[0053] 103,IS: Electronic photosensitive element

[0054] 104: Image stabilization module

[0055] 700: Vehicle Tools

[0056] E1: First lens

[0057] E2: Second lens

[0058] E3: The third lens

[0059] E4: The fourth lens

[0060] E5: The fifth lens

[0061] E6: The sixth lens

[0062] E7: Filter element

[0063] ST: Aperture

[0064] S1, S2, S3: aperture

[0065] IP: Inflection Point

[0066] CP: critical point

[0067] CT1: Thickness of the first lens on the optical axis

[0068] CT2: The thickness of the second lens on the optical axis

[0069] CT4: Thickness of the fourth lens on the optical axis

[0070] CT6: Thickness of the sixth lens on the optical axis

[0071] T12: The distance between the first lens and the second lens on the optical axis

[0072] T23: The distance between the second lens and the third lens on the optical axis

[0073] T45: The distance between the fourth lens and the fifth lens on the optical axis

[0074] T56: The distance between the fifth lens and the sixth lens on the optical axis

[0075] TD: The distance on the optical axis from the object side surface of the first lens to the image side surface of the sixth lens

[0076] TL: The distance from the object side surface of the first lens to the imaging surface on the optical axis

[0077] R6: Radius of curvature of the image-side surface of the third lens

[0078] R8: Radius of curvature of the image-side surface of the fourth lens

[0079] R9: The radius of curvature of the object side surface of the fifth lens

[0080] R10: Radius of curvature of the image-side surface of the fifth lens

[0081] R11: The radius of curvature of the object side surface of the sixth lens

[0082] R12: The radius of curvature of the image-side surface of the sixth lens

[0083] f: focal length of the optical lens system

[0084] f1: focal length of the first lens

[0085] f12: The combined focal length of the first and second lenses

[0086] BL: The distance from the image side surface of the sixth lens to the imaging plane on the optical axis

[0087] V1: Abbe number of the first lens

[0088] V2: Abbe number of the second lens

[0089] V3: Abbe number of the third lens

[0090] V4: Abbe number of the fourth lens

[0091] V5: Abbe number of the fifth lens

[0092] V6: Abbe number of the sixth lens

[0093] Vmin: The smallest of V1, V2, V3, V4, V5, and V6

[0094] SAG1R1: Horizontal displacement of the intersection of the first lens object side surface on the optical axis to the maximum effective radius position of the first lens object side surface on the optical axis

[0095] SAG1R2: Horizontal displacement of the intersection of the image side surface of the first lens on the optical axis to the maximum effective radius position of the image side surface of the first lens on the optical axis

[0096] Y1R1: Maximum effective radius of the first lens object side surface

[0097] Y2R1: Maximum effective radius of the second lens object side surface

[0098] Y6R2: Maximum effective radius of the image side surface of the sixth lens

[0099] ET1: The distance from the maximum effective diameter position of the optical effective area of ​​the object side surface of the first lens to the maximum effective diameter position of the optical effective area of ​​the image side surface of the first lens parallel to the optical axis

[0100] ET4: The distance from the maximum effective diameter position of the optical effective area of ​​the fourth lens object side surface to the maximum effective diameter position of the optical effective area of ​​the fourth lens image side surface parallel to the optical axis

[0101] ET5: The distance from the maximum effective diameter position of the optical effective area of ​​the object side surface of the fifth lens to the maximum effective diameter position of the optical effective area of ​​the image side surface of the fifth lens parallel to the optical axis

[0102] ImgH: Maximum image height of the optical lens system

[0103] HFOV: Half of the maximum field of view in an optical lens system

[0104] Fno: Aperture value of the optical lens system

[0105] LF, LF1, LF2: Optical path turning element

[0106] LG: Lens Group

[0107] IMG: Imaging surface

[0108] OA1: First optical axis

[0109] OA2: Second optical axis

[0110] OA3: Third optical axis DETAILED DESCRIPTION

[0111] The present disclosure provides an optical lens system, which includes six lenses in order from the object side to the image side, and the six lenses are a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens from the object side to the image side. Each lens has an object side surface facing the object side and an image side surface facing the image side.

[0112] The first lens may have negative refractive power, which helps to collect light to increase the viewing angle and is conducive to adjusting the refractive power configuration of the optical lens system. The image side surface of the first lens near the optical axis may be concave, which can adjust the direction of light travel, help to receive the light path incident from a wider viewing angle, and reduce the generation of astigmatism.

[0113] The image-side surface of the second lens is concave near the optical axis, which can guide the light path to avoid total reflection caused by excessive turning angles, while correcting the spherical aberration accumulated at the front end of the optical lens system to improve imaging quality.

[0114] The third lens may have positive refractive power, which helps to converge light and effectively control the direction of the light path, so as to reduce the back focal length and compress the volume of the optical lens system. The object side surface of the third lens may be convex near the optical axis, which helps to correct the aberration on the axis and balance the aberrations such as spherical aberration and coma caused by the compressed volume. The image side surface of the third lens may be convex near the optical axis, which can converge light and help to compress the total length of the optical lens system while correcting the aberration.

[0115] The image side surface of the fourth lens is concave near the optical axis, which can adjust the light in the emission direction of the fourth lens, help improve the illumination, and correct spherical aberration. In addition, the image side surface of the fourth lens includes at least one inflection point, which can enrich the surface shape change of the image side surface of the fourth lens, control the emission light around the fourth lens, and reduce off-axis aberration.

[0116] The object-side surface of the fifth lens element near the optical axis may be a convex surface, which can adjust the surface shape and refractive power of the fifth lens element and help correct astigmatism and distortion.

[0117] The image side surface of the sixth lens includes at least one inflection point, which can make the surface shape of the image side surface of the sixth lens have a positive and negative curvature change, effectively shorten the back focal length of the optical lens system, control the total length of the optical lens system, and help correct and compensate for the peripheral image field curvature. In addition, the object side surface of the sixth lens may include at least one inflection point, which can increase the design freedom of the sixth lens and help correct astigmatism and the image curvature accumulated by the overall optical lens system.

[0118] The image-side surface of the sixth lens may include at least one concave critical point, which helps to control the peripheral light angle, further shorten the total length of the optical lens system, and avoid vignetting at the periphery of the image and reduce distortion.

[0119] There is an air gap on the optical axis between any two adjacent lenses among the six lenses, which helps to increase the design freedom of the lens surface shape, enabling the optical lens system to achieve a balance between the total length and the imaging quality. Additionally, at least two of the six lenses are made of plastic material, which can reduce the production cost, is easy to adapt to the aspherical surface shape design, and reduces the manufacturing tolerance. The object-side surface and the image-side surface of at least two of the six lenses are aspherical, which can increase the lens design freedom, help to reduce the volume of the optical lens system, and improve the imaging quality.

[0120] The thickness of the first lens on the optical axis is CT1, and the distance between the first lens and the second lens on the optical axis is T12. In the present disclosure, the distance between two adjacent lenses on the optical axis refers to the distance on the optical axis between the two adjacent lens surfaces of the two adjacent lenses. The distance from the object-side surface of the first lens to the image-side surface of the sixth lens on the optical axis is TD, which satisfies the following condition: 0.22 < (CT1 + T12) / TD < 0.45. Thereby, the center thickness of the first lens and the distance between the first lens and the second lens can be controlled, which is beneficial to achieving a balance between adjusting the light path traveling direction and the volume of the lens group. Furthermore, it can satisfy the following condition: 0.25 < (CT1 + T12) / TD < 0.40. Furthermore, it can satisfy the following condition: 0.28 ≤ (CT1 + T12) / TD ≤ 0.37.

[0121] The radius of curvature of the image-side surface of the fifth lens is R10, and the radius of curvature of the object-side surface of the sixth lens is R11, which satisfies the following condition: 0.20 < R11 / R10 < 3.30. Thereby, the ratio of the radius of curvature of the image-side surface of the fifth lens to the radius of curvature of the object-side surface of the sixth lens can be adjusted, which helps to improve astigmatism and chromatic aberration of magnification. Furthermore, it can satisfy the following condition: 0.20 < R11 / R10 < 1.50. Furthermore, it can satisfy the following condition: 0.30 < R11 / R10 < 2.20. Furthermore, it can satisfy the following condition: 0.30 < R11 / R10 < 1.15. Furthermore, it can satisfy the following condition: 0.39 ≤ R11 / R10 ≤ 0.96.

[0122] The focal length of the optical lens system is f, and the distance from the object-side surface of the first lens to the imaging surface on the optical axis is TL, which satisfies the following condition: 6.00 < TL / f < 13.00. Thereby, it helps to achieve a balance between the overall refractive power and the volume of the optical lens system and effectively control its total length. Furthermore, it can satisfy the following condition: 6.50 < TL / f < 9.50. Furthermore, it can satisfy the following condition: 6.74 ≤ TL / f ≤ 10.11.

[0123] The radius of curvature of the object-side surface of the sixth lens is R11, and the combined focal length of the first lens and the second lens is f12, which satisfy the following conditions: -1.60 < |R11| / f12 < -0.50. Thereby, the surface shape of the object-side surface of the sixth lens can be designed, which helps to correct the astigmatism of the optical lens system and reduce the stray light within the optical lens system. Furthermore, it can satisfy the following conditions: -1.45 < |R11| / f12 < -0.65. Furthermore, it can satisfy the following conditions: -1.16 ≤ |R11| / f12 ≤ -0.67.

[0124] The focal length of the first lens is f1, and the thickness of the first lens on the optical axis is CT1, which satisfy the following conditions: -6.40 < f1 / CT1 < 0.00. Thereby, it helps to adjust the surface shape and refractive power of the object-side surface of the first lens to compress the volume, while reducing the generation of spherical aberration and improving the imaging quality. Furthermore, it can satisfy the following conditions: -5.50 < f1 / CT1 < -2.00. Furthermore, it can satisfy the following conditions: -5.00 < f1 / CT1 < -2.50. Furthermore, it can satisfy the following conditions: -4.72 ≤ f1 / CT1 ≤ -2.85.

[0125] The distance between the second lens and the third lens on the optical axis is T23, and the distance between the fourth lens and the fifth lens on the optical axis is T45, which satisfy the following conditions: 0.04 < T45 / T23 < 1.10. Thereby, the ratio of the distance between the fourth lens and the fifth lens and the distance between the second lens and the third lens can be controlled, which helps to reduce the manufacturing sensitivity and correct the aberration at the same time. Furthermore, it can satisfy the following conditions: 0.05 < T45 / T23 < 1.00. Furthermore, it can satisfy the following conditions: 0.06 ≤ T45 / T23 ≤ 0.28.

[0126] The focal length of the optical lens system is f, and the thickness of the first lens on the optical axis is CT1, which satisfy the following conditions: 1.0 < f / CT1 < 2.3. Thereby, the ratio of the focal length of the optical lens system to the central thickness of the first lens can be effectively adjusted to compress the volume of the optical lens system. Furthermore, it can satisfy the following conditions: 1.1 < f / CT1 < 2.1. Furthermore, it can satisfy the following conditions: 1.30 ≤ f / CT1 ≤ 2.02.

[0127] The focal length of the first lens is f1, and the distance from the object-side surface of the first lens to the imaging surface on the optical axis is TL, which satisfy the following conditions: -0.40 < f1 / TL < 0.00. Thereby, the refractive power of the first lens is used to assist in balancing the total length of the optical lens system to avoid its excessive total length. Furthermore, it can satisfy the following conditions: -0.35 < f1 / TL < -0.2. Furthermore, it can satisfy the following conditions: -0.29 ≤ f1 / TL ≤ -0.25.

[0128] The distance from the object-side surface of the first lens to the image-side surface of the sixth lens on the optical axis is TD, and the thickness of the sixth lens on the optical axis is CT6, which satisfy the following condition: 10 < TD / CT6 < 21. Thereby, by changing the proportional relationship between the center thickness of the sixth lens and the length of the lens group, the volume of the optical lens system is compressed. Furthermore, it can satisfy the following condition: 10 < TD / CT6 < 18. Furthermore, it can satisfy the following condition: 12.16 ≤ TD / CT6 ≤ 16.65.

[0129] The radius of curvature of the object-side surface of the sixth lens is R11, and the radius of curvature of the image-side surface of the sixth lens is R12, which satisfy the following condition: 0.9 < |R12 / R11| < 20.0. By adjusting the surface shape of the sixth lens, the field curvature of the entire optical lens system can be corrected. Furthermore, it can satisfy the following condition: 1.0 < |R12 / R11| < 18.0.

[0130] The distance between the fourth lens and the fifth lens on the optical axis is T45, and the distance between the fifth lens and the sixth lens on the optical axis is T56, which satisfy the following condition: 0.05 < T56 / T45 < 10.00. Thereby, the distance between the fifth lens and the sixth lens and the proportional relationship between the distance between the fourth lens and the fifth lens can be controlled, which helps to reduce manufacturing tolerances and improve the yield. Furthermore, it can satisfy the following condition: 0.30 < T56 / T45 < 6.50. Furthermore, it can satisfy the following condition: 0.30 < T56 / T45 < 3.00.

[0131] The focal length of the first lens is f1, and the distance from the image-side surface of the sixth lens to the imaging surface on the optical axis is BL, which satisfy the following condition: -2.60 < f1 / BL < 0.00. Thereby, the back focal length of the optical lens system can be effectively controlled, the volume of the optical lens system can be reduced, and a certain refractive power of the first lens can be ensured. Furthermore, it can satisfy the following condition: -2.00 < f1 / BL < -0.50.

[0132] The thickness of the second lens on the optical axis is CT2, and the thickness of the fourth lens on the optical axis is CT4, which satisfy the following condition: 0.65 < CT2 / CT4 < 1.70. Thereby, the ratio of the center thickness of the second lens to the center thickness of the fourth lens can be adjusted, which helps to increase the space utilization efficiency and at the same time increase the symmetry of the optical lens system. Furthermore, it can satisfy the following condition: 0.70 < CT2 / CT4 < 1.60.

[0133] The optical lens system may further include a diaphragm, which can be disposed between the second lens and the third lens. Thereby, the diaphragm position can be controlled, and the incident angle of light incidence can be limited, which helps to improve the imaging quality.

[0134] The Abbe number of the first lens is V1, the Abbe number of the second lens is V2, the Abbe number of the third lens is V3, the Abbe number of the fourth lens is V4, the Abbe number of the fifth lens is V5, and the Abbe number of the sixth lens is V6. The smallest of V1, V2, V3, V4, V5, and V6 is Vmin, which satisfies the following condition: 8.0 ≤ Vmin ≤ 22.0. Thereby, the distribution of the lens material can be adjusted and the chromatic aberration generated by the optical lens system can be corrected, which helps to improve the imaging quality. Furthermore, it can satisfy the following condition: 10.0 ≤ Vmin ≤ 20.5.

[0135] The radius of curvature of the image-side surface of the third lens is R6, and the radius of curvature of the image-side surface of the fourth lens is R8, which satisfies the following condition: -20.00 < R6 / R8 < -0.20. Thereby, the surface shapes of the third lens and the fourth lens can be effectively balanced, the optical path of the optical lens system can be adjusted, and the aberrations can be balanced with each other to improve the imaging quality. Furthermore, it can satisfy the following condition: -8.00 < R6 / R8 < -0.30.

[0136] The horizontal displacement of the intersection of the object-side surface of the first lens on the optical axis to the position of the maximum effective radius of the object-side surface of the first lens on the optical axis is SAG1R1, and the horizontal displacement of the intersection of the image-side surface of the first lens on the optical axis to the position of the maximum effective radius of the image-side surface of the first lens on the optical axis is SAG1R2, which satisfies the following condition: 1.00 < SAG1R2 / SAG1R1 < 4.50. Thereby, the bending degrees of the peripheral surface shapes of the object-side surface and the image-side surface of the first lens can be controlled, which helps to ensure the light collection of a larger viewing angle, reduce the outer diameter of the object-side end of the optical lens system, and correct the coma aberration. Furthermore, it can satisfy the following condition: 1.50 < SAG1R2 / SAG1R1 < 3.75.

[0137] The maximum effective radius of the object-side surface of the first lens is Y1R1, and the maximum effective radius of the object-side surface of the second lens is Y2R1, which satisfies the following condition: 1.60 < Y1R1 / Y2R1 < 4.50. Thereby, the optical effective diameter heights of the first lens and the second lens can be balanced, which helps to increase the viewing angle and compress the volume. Furthermore, it can satisfy the following condition: 1.80 < Y1R1 / Y2R1 < 4.00.

[0138] The distance parallel to the optical axis from the position of the maximum effective diameter of the optical effective area on the object side surface of the first lens to the position of the maximum effective diameter of the optical effective area on the image side surface of the first lens is ET1, and the distance parallel to the optical axis from the position of the maximum effective diameter of the optical effective area on the object side surface of the fifth lens to the position of the maximum effective diameter of the optical effective area on the image side surface of the fifth lens is ET5, and they satisfy the following conditions: 1.50 < ET1 / ET5 < 5.00. Thereby, controlling the ratio of the edge thickness of the first lens to the edge thickness of the fifth lens helps to assist in balancing the peripheral light path paths at the front and rear ends of the optical lens system. Furthermore, they can satisfy the following conditions: 1.70 < ET1 / ET5 < 4.50.

[0139] The radius of curvature of the image side surface of the fourth lens is R8, and the radius of curvature of the object side surface of the fifth lens is R9, and they satisfy the following conditions: 0.20 < R8 / R9 < 2.50. Thereby, the fourth lens can cooperate with the fifth lens to improve the light path control ability of the lens and correct the distortion problem. Furthermore, they can satisfy the following conditions: 0.20 < R8 / R9 < 1.50.

[0140] The distance from the object side surface of the first lens to the imaging plane on the optical axis is TL, and the maximum image height of the optical lens system is ImgH, and they satisfy the following conditions: 2.50 < TL / ImgH < 5.50. Thereby, it helps to achieve a balance between compressing the total length and increasing the imaging plane, and further meets more diverse applications. Furthermore, they can satisfy the following conditions: 3.00 < TL / ImgH < 5.00.

[0141] The distance parallel to the optical axis from the position of the maximum effective diameter of the optical effective area on the object side surface of the fourth lens to the position of the maximum effective diameter of the optical effective area on the image side surface of the fourth lens is ET4, and the thickness of the fourth lens on the optical axis is CT4, and they satisfy the following conditions: 0.75 < ET4 / CT4 < 2.00. Thereby, the ratio of the edge thickness to the center thickness of the fourth lens can be adjusted to ensure that there is enough distance for the peripheral light path to propagate, which helps to increase the imaging size. Furthermore, they can satisfy the following conditions: 0.80 < ET4 / CT4 < 1.80.

[0142] The maximum image height of the optical lens system is ImgH, which can be half of the total diagonal length of the effective sensing area of the electronic photosensitive element. The maximum effective radius of the image side surface of the sixth lens is Y6R2, and they satisfy the following conditions: 1.20 < ImgH / Y6R2 < 2.20. Thereby, the optical effective diameter height of the image side surface of the sixth lens can be adjusted, which helps to increase the imaging size. Furthermore, they can satisfy the following conditions: 1.30 < ImgH / Y6R2 < 2.00.

[0143] The focal length of the optical lens system is f, and half of the maximum viewing angle in the optical lens system is HFOV, which satisfies the following conditions: 0.0 mm < f / tan(HFOV) < 1.0 mm. Thereby, the optical lens system can have a sufficient imaging range and avoid aberration such as distortion caused by an excessive viewing angle. Furthermore, it can satisfy the following conditions: 0.0 mm < f / tan(HFOV) < 0.6 mm.

[0144] The F-number of the optical lens system is Fno, which satisfies the following conditions: 1.5 < Fno < 2.1. Thereby, the aperture size can be controlled to meet the requirements of the light passing aperture of the application device, ensure the light input amount of the optical lens system, and improve the image brightness. Furthermore, it can satisfy the following conditions: 1.65 < Fno < 2.0.

[0145] The combined focal length of the first lens and the second lens is f12, and the distance from the image side surface of the sixth lens to the imaging surface on the optical axis is BL, which satisfies the following conditions: -1.5 < f12 / BL < -0.1. Thereby, it helps to balance the ratio of the front refractive power of the optical lens system to its back focal length, and makes the front refractive power of the optical lens system fall within a suitable range. Furthermore, it can satisfy the following conditions: -1.2 < f12 / BL < -0.3.

[0146] The radius of curvature of the object side surface of the sixth lens is R11, and the radius of curvature of the image side surface of the sixth lens is R12, which satisfies the following conditions: -35 < (R11 + R12) / (R11 - R12) < 0.5. Thereby, the surface shapes of the object side surface and the image side surface of the sixth lens can be controlled, which helps to reduce the back focal length. Furthermore, it can satisfy the following conditions: -25 < (R11 + R12) / (R11 - R12) < 0.

[0147] The Abbe number of the second lens is V2, and the Abbe number of the third lens is V3, which satisfies the following conditions: 0.75 < V2 / V3 < 1.32. Thereby, the front optical path of the optical lens system group can be adjusted, the convergence ability between light rays of different wavelength bands can be balanced, chromatic aberration can be corrected, and the imaging quality can be improved. Furthermore, it can satisfy the following conditions: 0.85 < V2 / V3 < 1.12.

[0148] Each technical feature in the optical lens system of the above disclosure can be combined and configured to achieve the corresponding effects.

[0149] In the optical lens system provided by the present disclosure, the material of the lens can be glass or plastic. If the material of the lens is glass, the degree of freedom of the refractive power configuration of the optical lens system can be increased, and the glass lens can be made using techniques such as grinding or molding. If the lens material is plastic, the production cost can be effectively reduced. In addition, a spherical surface or an aspherical surface (ASP) can be set on the mirror surface, wherein the spherical lens can reduce the difficulty of manufacturing, and if an aspherical surface is set on the mirror surface, more control variables can be obtained to reduce aberrations, reduce the number of lenses, and effectively reduce the total length of the optical lens system of the present disclosure, and the aspherical surface can be made by plastic injection molding or molded glass lenses.

[0150] In the optical lens system provided by the present disclosure, additives can be selectively added to any (or more) lens materials to produce light absorption or light interference effects to change the transmittance of the lens for light in a specific wavelength band, thereby reducing stray light and color deviation. For example: the additive can have the function of filtering out light in the 600nm to 800nm ​​wavelength band in the system to reduce excess red light or infrared light; or it can filter out light in the 350nm to 450nm wavelength band to reduce blue light or ultraviolet light in the system. Therefore, the additive can prevent light in a specific wavelength band from interfering with imaging. In addition, the additive can be evenly mixed in the plastic and made into a lens using injection molding technology. In addition, the additive can also be configured as a coating on the surface of the lens to provide the above-mentioned effects.

[0151] In the optical lens system provided by the present disclosure, if the lens surface is aspherical, it means that the entire or a part of the optically effective area of ​​the lens surface is aspherical.

[0152] In the optical lens system provided by the present disclosure, if the lens surface is convex and the position of the convex surface is not defined, it means that the lens surface can be convex at the near optical axis; if the lens surface is concave and the position of the concave surface is not defined, it means that the lens surface can be concave at the near optical axis. In the optical lens system provided by the present disclosure, if the lens has positive refractive power or negative refractive power, or the focal length of the lens, it can refer to the refractive power or focal length of the lens at the near optical axis.

[0153] In the optical lens system provided by the present disclosure, the critical point is the point of tangency on the lens surface that is tangent to a tangent plane perpendicular to the optical axis, except for the intersection with the optical axis; the inflection point is the intersection point where the curvature of the lens surface changes positively and negatively.

[0154] The imaging surface of the optical lens system provided by the present disclosure can be a plane or a curved surface with any curvature, especially a curved surface with a concave surface facing the object side, depending on the corresponding electronic photosensitive element. In addition, in the optical lens system of the present disclosure, one or more imaging correction elements (flat field elements, etc.) can be selectively arranged between the lens closest to the imaging surface on the imaging light path and the imaging surface to achieve the effect of correcting the image (image bending, etc.). The optical properties of the imaging correction element, such as curvature, thickness, refractive index, position, surface shape (convex or concave, spherical or aspherical, diffractive surface and Fresnel surface, etc.) can be adjusted according to the requirements of the imaging device. Generally speaking, the preferred imaging correction element configuration is to place a thin plano-concave element with a concave surface facing the object side close to the imaging surface.

[0155] In the optical lens system provided by the present disclosure, at least one element with the function of turning the optical path, such as a prism or a reflector, can be selectively arranged between the object and the imaging surface on the optical path, wherein the prism surface or the reflector surface can be a plane, a spherical surface, an aspherical surface or a free-form surface, etc., to provide a more flexible spatial configuration of the optical lens system, so that the thinness of the electronic device is not restricted by the total optical length of the optical lens system. For further explanation, please refer to Fig.16A as well as Fig. 16B ,in Fig.16A A schematic diagram showing a configuration relationship of a light path turning element LF in an optical lens system according to the present disclosure is shown. Fig. 16B FIG. 2 is a schematic diagram showing another configuration relationship of the light path turning element LF in the optical lens system according to the present disclosure. Fig.16A as well as Fig. 16B As shown, the optical lens system can be arranged along the optical path from the object (not shown) to the imaging surface IMG, and has a first optical axis OA1, an optical path turning element LF and a second optical axis OA2 in sequence, wherein the optical path turning element LF can be as shown in FIG. Fig.16A As shown, it is arranged between the object and the lens group LG of the optical lens system, or as shown Fig. 16B The figure shows the lens group LG and the imaging surface IMG of the optical lens system. Fig. 16C , which illustrates a schematic diagram of a configuration relationship of two light path turning elements LF1 and LF2 in an optical lens system according to the present disclosure. Fig. 16CAs shown, the optical lens system can also be arranged along the optical path from the object (not shown) to the imaging surface IMG, and has a first optical axis OA1, an optical path turning element LF1, a second optical axis OA2, an optical path turning element LF2 and a third optical axis OA3 in sequence, wherein the optical path turning element LF1 is arranged between the object and the lens group LG of the optical lens system, and the optical path turning element LF2 is arranged between the lens group LG of the optical lens system and the imaging surface IMG. The optical lens system can also selectively be equipped with more than three optical path turning elements, and the present disclosure is not limited to the type, quantity and position of the optical path turning elements disclosed in the drawings.

[0156] In addition, in the optical lens system provided by the present disclosure, at least one aperture stop, such as an aperture stop, a glare stop, or a field stop, can be provided as required to help reduce stray light and improve image quality.

[0157] In the optical lens system provided by the present disclosure, the aperture configuration can be a front aperture or a center aperture, wherein the front aperture means that the aperture is set between the object and the first lens, and the center aperture means that the aperture is set between the first lens and the imaging surface. If the aperture is a front aperture, the exit pupil of the optical lens system can be at a longer distance from the imaging surface, so that it has a telecentric effect and can increase the efficiency of the CCD or CMOS of the electronic photosensitive element in receiving the image; if it is a center aperture, it helps to expand the field of view of the optical lens system, so that it has the advantages of a wide-angle lens.

[0158] The present disclosure may appropriately set a variable aperture element, which may be a mechanical component or a light control element, which can control the size and shape of the aperture by electricity or electrical signals. The mechanical component may include movable parts such as a blade set and a shielding plate; the light control element may include a filter element, an electrochromic material, a liquid crystal layer and other shielding materials. 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 the present disclosure, which can adjust the image quality, such as the depth of field or the exposure speed, by changing the aperture value.

[0159] The present disclosure may appropriately set one or more optical elements to limit the form of light passing through the optical lens system. The optical element may be a filter, a polarizer, etc., but is not limited to the above elements, and the optical element may be a single element, a composite component, or presented in the form of a film, etc., but is not limited to the above methods. The optical element may be placed at the object end, the image end, or between the lenses of the optical lens system to control the passage of a specific form of light, thereby meeting the application requirements.

[0160] The optical lens system disclosed herein may include at least one optical lens, optical element or carrier, at least one surface of which has a low-reflection layer, and the low-reflection layer can effectively reduce the stray light generated by the reflection of light at the interface. The low-reflection layer can be arranged on the non-effective area of ​​the object side surface or the image side surface of the optical lens, or the connecting surface between the object side surface and the image side surface; the optical element can be a shading element, an annular spacer element, a lens barrel element, a flat glass (Cover glass), a blue glass (Blue glass), a filter element (Filter, Color filter), an optical path turning element, a prism or a mirror, etc.; the carrier can be a lens assembly lens mount, a micro lens (Micro lens) arranged on a photosensitive element, the periphery of a photosensitive element substrate, or a glass sheet used to protect a photosensitive element, etc.

[0161] The optical lens system provided by the present disclosure can also be widely used in three-dimensional (3D) image capture, digital cameras, mobile products, digital tablets, smart TVs, network monitoring equipment, somatosensory game consoles, driving recorders, reversing imaging devices, wearable products, drones and other electronic devices.

[0162] The present disclosure provides an imaging device, comprising an optical lens system and an electronic photosensitive element as described above, wherein the electronic photosensitive element is disposed on the imaging surface of the optical lens system. The configuration of the lens surface shape in the optical lens system is conducive to achieving a balance between the optical path adjustment and the volume of the optical lens system, providing high imaging quality and maintaining its miniaturization. Preferably, the imaging device may further include a lens barrel, a supporting device or a combination thereof.

[0163] The present disclosure provides an electronic device, comprising the aforementioned imaging device, thereby improving the imaging quality. Preferably, the aforementioned electronic device may further comprise a control unit, a display unit, a storage unit, a random access memory or a combination thereof.

[0164] According to the above implementation modes, specific embodiments are proposed below and described in detail with reference to the accompanying drawings.

[0165] <First Embodiment>

[0166] Please refer to Figure 1A as well as Figure 1B ,in Figure 1A FIG. 1 is a schematic diagram showing an image capturing device 1 according to a first embodiment of the present disclosure. Figure 1B From left to right are the spherical aberration, astigmatism and distortion curves of the first embodiment. Figure 1AIt can be seen that the imaging device 1 of the first embodiment includes an optical lens system (not separately labeled) and an electronic photosensitive element IS. The optical lens system includes a first lens E1, a second lens E2, an aperture ST, a third lens E3, a stop S1, a fourth lens E4, a fifth lens E5, a sixth lens E6, a stop S2, a filter element E7 and an imaging surface IMG in order from the object side to the image side of the optical path, and the electronic photosensitive element IS is disposed on the imaging surface IMG of the optical lens system, wherein the optical lens system includes six lenses (E1, E2, E3, E4, E5, E6), and there is no other interpolated lens between the six lenses.

[0167] 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, and both are aspherical. Figure 8B , which is a schematic diagram of the inflection point IP and critical point CP of each lens according to the first embodiment. The object side surface of the first lens E1 includes an inflection point IP (marked at Figure 8B ) and a critical point CP (marked at Figure 8B ), the image-side surface of the first lens E1 includes two inflection points IP (marked at Figure 8B ).

[0168] The second lens E2 has negative refractive power and is made of plastic. Its object-side surface is concave near the optical axis, and its image-side surface is concave near the optical axis. Both are aspherical. In addition, the object-side surface of the second lens E2 includes an inflection point IP (marked at Figure 8B ).

[0169] The third lens E3 has positive refractive power and is made of plastic. Its object-side surface near the optical axis is convex, and its image-side surface near the optical axis is convex, and both are aspherical. In addition, the object-side surface of the third lens E3 includes an inflection point IP (marked at Figure 8B ).

[0170] The fourth lens E4 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 are aspherical. In addition, the object-side surface of the fourth lens E4 includes two inflection points IP (marked at Figure 8B ) and the second critical point CP (marked at Figure 8B ), the image-side surface of the fourth lens E4 includes an inflection point IP (marked at Figure 8B ) and a critical point CP (marked at Figure 8B ).

[0171] The fifth lens E5 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 are aspherical. In addition, the object-side surface of the fifth lens E5 includes an inflection point IP (marked at Figure 8B), the image-side surface of the fifth lens E5 includes an inflection point IP (marked at Figure 8B ).

[0172] The sixth lens E6 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 are aspherical. In addition, the object-side surface of the sixth lens E6 includes an inflection point IP (marked at Figure 8B ), the image-side surface of the sixth lens E6 includes an inflection point IP (marked at Figure 8B ) and a critical point CP (marked at Figure 8B ).

[0173] The filter element E7 is made of glass, is disposed between the sixth lens E6 and the imaging plane IMG and does not affect the focal length of the optical lens system.

[0174] The curve equations of the aspheric surfaces of the above lenses are expressed as follows:

[0175]

[0176] ;in:

[0177] X: displacement parallel to the optical axis from the intersection of the aspheric surface and the optical axis to the point on the aspheric surface at a distance Y from the optical axis;

[0178] Y: the vertical distance between the point on the aspheric curve and the optical axis;

[0179] R: radius of curvature;

[0180] k: cone coefficient; and

[0181] Ai: i-th order aspheric coefficient.

[0182] In the optical lens system of the first embodiment, the focal length of the optical lens system is f, the aperture value (f-number) of the optical lens system is Fno, and half of the maximum viewing angle in the optical lens system is HFOV, and its values ​​are as follows: f=0.45mm; Fno=1.80; and HFOV=78.8 degrees.

[0183] In the optical lens system of the first embodiment, the maximum viewing angle in the optical lens system is FOV, which satisfies the following condition: FOV=157.6 degrees.

[0184] In the optical lens system of the first embodiment, the distance from the object side surface of the first lens E1 to the imaging surface IMG on the optical axis is TL, and the maximum image height of the optical lens system is ImgH, which satisfies the following condition: TL / ImgH=4.13.

[0185] In the optical lens system of the first embodiment, the focal length of the optical lens system is f, and half of the maximum viewing angle in the optical lens system is HFOV, which satisfies the following condition: f / tan(HFOV)=0.09 mm.

[0186] In the optical lens system of the first embodiment, the distance from the object-side surface of the first lens E1 to the imaging surface IMG on the optical axis is TL, and the focal length of the optical lens system is f, which satisfies the following condition: TL / f=9.13.

[0187] In the optical lens system of the first embodiment, the focal length of the first lens E1 is f1, and the distance from the image-side surface of the sixth lens E6 to the imaging plane IMG on the optical axis is BL, which satisfies the following condition: f1 / BL=-1.44.

[0188] In the optical lens system of the first embodiment, the focal length of the optical lens system is f, and the thickness of the first lens E1 on the optical axis is CT1, which satisfies the following condition: f / CT1=1.63.

[0189] In the optical lens system of the first embodiment, the focal length of the first lens E1 is f1, and the distance from the object-side surface of the first lens E1 to the imaging surface IMG on the optical axis is TL, which satisfies the following condition: f1 / TL=-0.29.

[0190] In the optical lens system of the first embodiment, the combined focal length of the first lens E1 and the second lens E2 is f12, the distance between the image-side surface of the sixth lens E6 and the imaging plane IMG on the optical axis is BL, and the radius of curvature of the object-side surface of the sixth lens E6 is R11, which satisfies the following conditions: f12 / BL=-0.61; and |R11| / f12=-1.16.

[0191] In the optical lens system of the first embodiment, the focal length of the first lens E1 is f1, and the thickness of the first lens E1 on the optical axis is CT1, which satisfies the following condition: f1 / CT1=-4.28.

[0192] In the optical lens system of the first embodiment, the radius of curvature of the image-side surface of the third lens E3 is R6, the radius of curvature of the image-side surface of the fourth lens E4 is R8, the radius of curvature of the object-side surface of the fifth lens E5 is R9, the radius of curvature of the image-side surface of the fifth lens E5 is R10, the radius of curvature of the object-side surface of the sixth lens E6 is R11, and the radius of curvature of the image-side surface of the sixth lens E6 is R12, which satisfy the following conditions: R11 / R10=0.52; |R12 / R11|=1.38; R6 / R8=-0.74; R8 / R9=1.18; and (R11+R12) / (R11-R12)=-6.33.

[0193] In the optical lens system of the first embodiment, the thickness of the first lens E1 on the optical axis is CT1, the thickness of the sixth lens E6 on the optical axis is CT6, the interval between the first lens E1 and the second lens E2 on the optical axis is T12, and the distance between the object-side surface of the first lens E1 and the image-side surface of the sixth lens E6 on the optical axis is TD, which satisfies the following conditions: (CT1+T12) / TD=0.33; and TD / CT6=14.95.

[0194] In the optical lens system of the first embodiment, the thickness of the second lens E2 on the optical axis is CT2, and the thickness of the fourth lens E4 on the optical axis is CT4, which satisfies the following condition: CT2 / CT4=1.18.

[0195] In the optical lens system of the first embodiment, the distance between the second lens E2 and the third lens E3 on the optical axis is T23, the distance between the fourth lens E4 and the fifth lens E5 on the optical axis is T45, and the distance between the fifth lens E5 and the sixth lens E6 on the optical axis is T56, which satisfy the following conditions: T56 / T45=1.03; and T45 / T23=0.09.

[0196] In the optical lens system of the first embodiment, the Abbe number of the first lens E1 is V1, the Abbe number of the second lens E2 is V2, the Abbe number of the third lens E3 is V3, the Abbe number of the fourth lens E4 is V4, the Abbe number of the fifth lens E5 is V5, and the Abbe number of the sixth lens E6 is V6. The smallest of V1, V2, V3, V4, V5, and V6 is Vmin, which satisfies the following conditions: Vmin=19.5; and V2 / V3=1.00.

[0197] Mate Reference Fig. 8A , which is a schematic diagram showing some parameters according to the first embodiment. Fig. 8A It can be seen that in the optical lens system of the first embodiment, the distance from the position of the maximum effective diameter of the optically effective area of ​​the object-side surface of the fourth lens E4 to the position of the maximum effective diameter of the optically effective area of ​​the image-side surface of the fourth lens E4 parallel to the optical axis is ET4, and the thickness of the fourth lens E4 on the optical axis is CT4 (not shown in the figure), which satisfies the following condition: ET4 / CT4=1.39.

[0198] In the optical lens system of the first embodiment, the distance parallel to the optical axis from the maximum effective diameter position of the optical effective area of ​​the object-side surface of the first lens E1 to the maximum effective diameter position of the optical effective area of ​​the image-side surface of the first lens E1 is ET1 (indicated by Fig. 8A ), the distance from the maximum effective diameter position of the optical effective area of ​​the object-side surface of the fifth lens E5 to the maximum effective diameter position of the optical effective area of ​​the image-side surface of the fifth lens E5 parallel to the optical axis is ET5 (indicated on Fig. 8A), which satisfies the following condition: ET1 / ET5=2.60.

[0199] In the optical lens system of the first embodiment, the horizontal displacement from the intersection of the object side surface of the first lens E1 on the optical axis to the maximum effective radius position of the object side surface of the first lens E1 on the optical axis is SAG1R1 (indicated by Fig. 8A ), the horizontal displacement from the intersection of the image-side surface of the first lens E1 on the optical axis to the position of the maximum effective radius of the image-side surface of the first lens E1 on the optical axis is SAG1R2 (indicated by Fig. 8A ), which satisfies the following condition: SAG1R2 / SAG1R1=1.81. If the above-mentioned horizontal displacement is from the object side to the image side, the value of the horizontal displacement (SAG) is a positive value, and if it is from the image side to the object side, the value of the horizontal displacement is a negative value.

[0200] In the optical lens system of the first embodiment, the maximum effective radius of the object side surface of the first lens E1 is Y1R1 (indicated at Fig. 8A ), the maximum effective radius of the object side surface of the second lens E2 is Y2R1 (indicated on Fig. 8A ), which satisfies the following condition: Y1R1 / Y2R1=2.95.

[0201] In the optical lens system of the first embodiment, the maximum image height of the optical lens system is ImgH, and the maximum effective radius of the image side surface of the sixth lens E6 is Y6R2 (indicated at Fig. 8A ), which satisfies the following condition: ImgH / Y6R2=1.59.

[0202] Please refer to the following Table 1A and Table 1B.

[0203]

[0204]

[0205]

[0206]

[0207]

[0208] Table 1A Figure 1AThe first embodiment provides detailed structural data, wherein the units of the radius of curvature, thickness and focal length are in mm, and surfaces 0-18 represent the surfaces from the object side to the image side in sequence, and the refractive index is the refractive index measured at the reference wavelength. Table 1B is the aspheric surface data of the first embodiment, wherein k represents the cone coefficient in the aspheric curve equation, and A4-A28 represents the 4th-28th order aspheric surface coefficients of each surface. In addition, the following tables of the embodiments correspond to the schematic diagrams and aberration curves of the embodiments, and the definitions of the data in the tables are the same as those in Tables 1A and 1B of the first embodiment, and are not repeated here.

[0209] <Second Embodiment>

[0210] Please refer to Figure 2A as well as Figure 2B ,in Figure 2A FIG. 1 is a schematic diagram showing an imaging device 2 according to a second embodiment of the present disclosure. Figure 2B From left to right are the spherical aberration, astigmatism and distortion curves of the second embodiment. Figure 2A It can be seen that the imaging device 2 of the second embodiment includes an optical lens system (not separately labeled) and an electronic photosensitive element IS. The optical lens system includes a first lens E1, a second lens E2, an aperture ST, a third lens E3, a stop S1, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter element E7 and an imaging surface IMG in order from the object side to the image side of the optical path, and the electronic photosensitive element IS is disposed on the imaging surface IMG of the optical lens system, wherein the optical lens system includes six lenses (E1, E2, E3, E4, E5, E6), and there is no other interpolated lens between the six lenses.

[0211] 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, and both are aspherical. In addition, the object side surface of the first lens E1 includes two inflection points, and the image side surface of the first lens E1 includes two inflection points.

[0212] The second lens E2 has negative refractive power and is made of plastic, and its object side surface is concave near the optical axis, and its image side surface is concave near the optical axis, and both are aspherical. In addition, the object side surface of the second lens E2 includes an inflection point.

[0213] The third lens E3 has positive refractive power and is made of plastic, its object side surface is convex near the optical axis, and its image side surface is convex near the optical axis, and both are aspherical. In addition, the image side surface of the third lens E3 includes an inflection point.

[0214] The fourth lens E4 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, and both are aspherical. In addition, the object-side surface of the fourth lens E4 includes an inflection point, and the image-side surface of the fourth lens E4 includes an inflection point.

[0215] The fifth lens E5 has positive refractive power and is made of plastic, its object side surface near the optical axis is convex, its image side surface near the optical axis is concave, and both are aspherical. In addition, the image side surface of the fifth lens E5 includes two inflection points and two critical points.

[0216] The sixth lens E6 has positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis, and both are aspherical. In addition, the object-side surface of the sixth lens E6 includes an inflection point and a critical point, and the image-side surface of the sixth lens E6 includes three inflection points and a critical point.

[0217] The filter element E7 is made of glass, is disposed between the sixth lens E6 and the imaging plane IMG and does not affect the focal length of the optical lens system.

[0218] Please refer to Table 2A and Table 2B below.

[0219]

[0220]

[0221]

[0222]

[0223] In the second embodiment, the curve equation of the aspheric surface is expressed in the same form as in the first embodiment. In addition, the definitions of the parameters in the following table are the same as those in the first embodiment and are not repeated here.

[0224] The following data in Table 2C can be derived by combining Table 2A and Table 2B:

[0225]

[0226] <Third Embodiment>

[0227] Please refer to Figure 3A as well as Figure 3B ,in Figure 3A FIG. 1 is a schematic diagram showing an imaging device 3 according to a third embodiment of the present disclosure. Figure 3B From left to right are the spherical aberration, astigmatism and distortion curves of the third embodiment. Figure 3AIt can be seen that the imaging device 3 of the third embodiment includes an optical lens system (not separately labeled) and an electronic photosensitive element IS. The optical lens system includes a first lens E1, an aperture S1, a second lens E2, an aperture ST, a third lens E3, an aperture S2, a fourth lens E4, a fifth lens E5, an aperture S3, a sixth lens E6, a filter element E7 and an imaging surface IMG in order from the object side to the image side of the optical path, and the electronic photosensitive element IS is disposed on the imaging surface IMG of the optical lens system, wherein the optical lens system includes six lenses (E1, E2, E3, E4, E5, E6), and there is no other interpolated lens between the six lenses.

[0228] 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, and both are aspherical. In addition, the object side surface of the first lens E1 includes an inflection point and a critical point, and the image side surface of the first lens E1 includes an inflection point.

[0229] The second lens E2 has negative refractive power and is made of plastic, its object side surface is convex near the optical axis, and its image side surface is concave near the optical axis, and both are aspherical. In addition, the object side surface of the second lens E2 includes two inflection points.

[0230] The third lens E3 has positive refractive power and is made of plastic, its object side surface is convex near the optical axis, and its image side surface is convex near the optical axis, and both are aspherical. In addition, the object side surface of the third lens E3 includes an inflection point.

[0231] The fourth lens E4 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, and both are aspherical. In addition, the object-side surface of the fourth lens E4 includes an inflection point and a critical point, and the image-side surface of the fourth lens E4 includes an inflection point.

[0232] The fifth lens E5 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, and both are aspherical. In addition, the object-side surface of the fifth lens E5 includes two inflection points, and the image-side surface of the fifth lens E5 includes one inflection point.

[0233] The sixth lens E6 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, and both are aspherical. In addition, the object-side surface of the sixth lens E6 includes three inflection points, and the image-side surface of the sixth lens E6 includes an inflection point and a critical point.

[0234] The filter element E7 is made of glass, is disposed between the sixth lens E6 and the imaging plane IMG and does not affect the focal length of the optical lens system.

[0235] Please refer to Table 3A and Table 3B below.

[0236]

[0237]

[0238]

[0239]

[0240]

[0241] In the third embodiment, the curve equation of the aspheric surface is expressed in the same form as in the first embodiment. In addition, the definitions of the parameters in the following table are the same as those in the first embodiment and are not repeated here.

[0242] The following data in Table 3C can be derived by combining Table 3A and Table 3B:

[0243]

[0244]

[0245] <Fourth Embodiment>

[0246] Please refer to Figure 4A as well as Figure 4B ,in Figure 4A FIG. 4 is a schematic diagram showing an image capturing device 4 according to a fourth embodiment of the present disclosure. Figure 4B From left to right are the spherical aberration, astigmatism and distortion curves of the fourth embodiment. Figure 4A It can be seen that the image capturing device 4 of the fourth embodiment includes an optical lens system (not separately labeled) and an electronic photosensitive element IS. The optical lens system includes a first lens E1, a second lens E2, an aperture ST, a third lens E3, a stop S1, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter element E7 and an imaging surface IMG in order from the object side to the image side of the optical path, and the electronic photosensitive element IS is disposed on the imaging surface IMG of the optical lens system, wherein the optical lens system includes six lenses (E1, E2, E3, E4, E5, E6), and there is no other interpolated lens between the six lenses.

[0247] 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, and both are aspherical.

[0248] 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 concave near the optical axis, and both are aspherical. In addition, the object side surface of the second lens E2 includes two inflection points and two critical points.

[0249] The third lens E3 has positive refractive power and is made of plastic, its object side surface is convex near the optical axis, and its image side surface is convex near the optical axis, and both are aspherical. In addition, the image side surface of the third lens E3 includes an inflection point.

[0250] The fourth lens E4 has negative refractive power and is made of plastic. Its object-side surface near the optical axis is convex, and its image-side surface near the optical axis is concave, and both are aspherical. In addition, the object-side surface of the fourth lens E4 includes an inflection point, and the image-side surface of the fourth lens E4 includes two inflection points and two critical points.

[0251] The fifth lens E5 has negative refractive power and is made of plastic. Its object-side surface near the optical axis is convex, and its image-side surface near the optical axis is concave, and both are aspherical. In addition, the object-side surface of the fifth lens E5 includes two inflection points and two critical points, and the image-side surface of the fifth lens E5 includes four inflection points and three critical points.

[0252] The sixth lens E6 has positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is convex near the optical axis, and both are aspherical. In addition, the object-side surface of the sixth lens E6 includes an inflection point and a critical point, and the image-side surface of the sixth lens E6 includes two inflection points and a critical point.

[0253] The filter element E7 is made of glass, is disposed between the sixth lens E6 and the imaging plane IMG and does not affect the focal length of the optical lens system.

[0254] Please refer to the following Table 4A and Table 4B.

[0255]

[0256]

[0257]

[0258] In the fourth embodiment, the curve equation of the aspheric surface is expressed in the same form as in the first embodiment. In addition, the definitions of the parameters in the following table are the same as those in the first embodiment and are not repeated here.

[0259] The following data in Table 4C can be derived by combining Table 4A and Table 4B:

[0260]

[0261] <Fifth Embodiment>

[0262] Please refer to Figure 5A as well as Figure 5B ,in Figure 5A FIG. 5 is a schematic diagram showing an imaging device 5 according to a fifth embodiment of the present disclosure. Figure 5BFrom left to right are the spherical aberration, astigmatism and distortion curves of the fifth embodiment. Figure 5A It can be seen that the imaging device 5 of the fifth embodiment includes an optical lens system (not separately labeled) and an electronic photosensitive element IS. The optical lens system includes a first lens E1, an aperture S1, a second lens E2, an aperture ST, a third lens E3, an aperture S2, a fourth lens E4, a fifth lens E5, an aperture S3, a sixth lens E6, a filter element E7 and an imaging surface IMG in order from the object side to the image side of the optical path, and the electronic photosensitive element IS is disposed on the imaging surface IMG of the optical lens system, wherein the optical lens system includes six lenses (E1, E2, E3, E4, E5, E6), and there is no other interpolated lens between the six lenses.

[0263] The first lens E1 has negative refractive power and is made of glass. Its object side surface is concave near the optical axis, and its image side surface is concave near the optical axis, and both are aspherical. In addition, the object side surface of the first lens E1 includes three inflection points and a critical point, and the image side surface of the first lens E1 includes two inflection points.

[0264] The second lens E2 has negative refractive power and is made of plastic, its object side surface is convex near the optical axis, and its image side surface is concave near the optical axis, and both are aspherical. In addition, the object side surface of the second lens E2 includes two inflection points.

[0265] The third lens E3 has positive refractive power and is made of plastic, its object side surface is convex near the optical axis, and its image side surface is convex near the optical axis, and both are aspherical. In addition, the object side surface of the third lens E3 includes an inflection point.

[0266] The fourth lens E4 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, and both are aspherical. In addition, the object-side surface of the fourth lens E4 includes an inflection point and a critical point, and the image-side surface of the fourth lens E4 includes an inflection point.

[0267] The fifth lens E5 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, and both are aspherical. In addition, the image side surface of the fifth lens E5 includes an inflection point.

[0268] The sixth lens E6 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, and both are aspherical. In addition, the object-side surface of the sixth lens E6 includes an inflection point, and the image-side surface of the sixth lens E6 includes three inflection points and a critical point.

[0269] The filter element E7 is made of glass, is disposed between the sixth lens E6 and the imaging plane IMG and does not affect the focal length of the optical lens system.

[0270] Please refer to the following Table 5A and Table 5B.

[0271]

[0272]

[0273]

[0274]

[0275]

[0276] In the fifth embodiment, the curve equation of the aspheric surface is expressed in the same form as in the first embodiment. In addition, the definitions of the parameters in the following table are the same as those in the first embodiment and are not repeated here.

[0277] The following data in Table 5C can be derived by combining Table 5A and Table 5B:

[0278]

[0279] <Sixth Embodiment>

[0280] Please refer to Fig. 6A as well as Figure 6B ,in Fig. 6A FIG. 1 is a schematic diagram showing an imaging device 6 according to a sixth embodiment of the present disclosure. Figure 6B From left to right are the spherical aberration, astigmatism and distortion curves of the sixth embodiment. Fig. 6A It can be seen that the image capturing device 6 of the sixth embodiment comprises an optical lens system (not separately labeled) and an electronic photosensitive element IS. The optical lens system comprises a first lens E1, a second lens E2, an aperture ST, a third lens E3, a stop S1, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter element E7 and an imaging surface IMG in order from the object side to the image side of the optical path, and the electronic photosensitive element IS is disposed on the imaging surface IMG of the optical lens system, wherein the optical lens system comprises six lenses (E1, E2, E3, E4, E5, E6), and there is no other interpolated lens between the six lenses.

[0281] 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, and both are aspherical. In addition, the object side surface of the first lens E1 includes three inflection points and a critical point.

[0282] The second lens E2 has negative refractive power and is made of plastic, its object side surface is concave near the optical axis, and its image side surface is concave near the optical axis, and both are aspherical. In addition, the object side surface of the second lens E2 includes two inflection points.

[0283] The third lens E3 has positive refractive power and is made of plastic, its object side surface is convex near the optical axis, and its image side surface is convex near the optical axis, and both are aspherical. In addition, the object side surface of the third lens E3 includes an inflection point.

[0284] The fourth lens E4 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, and both are aspherical. In addition, the image side surface of the fourth lens E4 includes an inflection point.

[0285] The fifth lens E5 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, and both are aspherical. In addition, the image side surface of the fifth lens E5 includes an inflection point.

[0286] The sixth lens E6 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, and both are aspherical. In addition, the object-side surface of the sixth lens E6 includes an inflection point, and the image-side surface of the sixth lens E6 includes an inflection point and a critical point.

[0287] The filter element E7 is made of glass, is disposed between the sixth lens E6 and the imaging plane IMG and does not affect the focal length of the optical lens system.

[0288] Please refer to the following Table 6A and Table 6B.

[0289]

[0290]

[0291]

[0292]

[0293] In the sixth embodiment, the curve equation of the aspheric surface is expressed in the same form as in the first embodiment. In addition, the definitions of the parameters in the following table are the same as those in the first embodiment and are not repeated here.

[0294] The following data in Table 6C can be derived by combining Table 6A and Table 6B:

[0295]

[0296]

[0297] <Seventh Embodiment>

[0298] Please refer to Fig. 7A as well as Figure 7B ,in Fig. 7AFIG. 1 is a schematic diagram showing an imaging device 7 according to a seventh embodiment of the present disclosure. Figure 7B From left to right are the spherical aberration, astigmatism and distortion curves of the seventh embodiment. Fig. 7A It can be seen that the imaging device 7 of the seventh embodiment includes an optical lens system (not separately labeled) and an electronic photosensitive element IS. The optical lens system includes a first lens E1, an aperture S1, a second lens E2, an aperture ST, a third lens E3, an aperture S2, a fourth lens E4, a fifth lens E5, an aperture S3, a sixth lens E6, a filter element E7 and an imaging surface IMG in order from the object side to the image side of the optical path, and the electronic photosensitive element IS is disposed on the imaging surface IMG of the optical lens system, wherein the optical lens system includes six lenses (E1, E2, E3, E4, E5, E6), and there is no other interpolated lens between the six lenses.

[0299] 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, and both are aspherical. In addition, the object side surface of the first lens E1 includes an inflection point and a critical point, and the image side surface of the first lens E1 includes two inflection points.

[0300] The second lens E2 has negative refractive power and is made of plastic, and its object side surface is concave near the optical axis, and its image side surface is concave near the optical axis, and both are aspherical. In addition, the object side surface of the second lens E2 includes an inflection point.

[0301] The third lens E3 has positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is convex near the optical axis, and both are aspherical.

[0302] The fourth lens E4 has positive refractive power and is made of plastic. Its object-side surface near the optical axis is convex, and its image-side surface near the optical axis is concave, and both are aspherical. In addition, the object-side surface of the fourth lens E4 includes an inflection point and a critical point, and the image-side surface of the fourth lens E4 includes two inflection points.

[0303] The fifth lens E5 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, and both are aspherical. In addition, the object-side surface of the fifth lens E5 includes two inflection points, and the image-side surface of the fifth lens E5 includes one inflection point.

[0304] The sixth lens E6 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, and both are aspherical. In addition, the object-side surface of the sixth lens E6 includes an inflection point, and the image-side surface of the sixth lens E6 includes an inflection point and a critical point.

[0305] The filter element E7 is made of glass, is disposed between the sixth lens E6 and the imaging plane IMG and does not affect the focal length of the optical lens system.

[0306] Please refer to Table 7A and Table 7B below.

[0307]

[0308]

[0309]

[0310]

[0311]

[0312] In the seventh embodiment, the curve equation of the aspheric surface is expressed in the same form as in the first embodiment. In addition, the definitions of the parameters in the following table are the same as those in the first embodiment and are not repeated here.

[0313] The following data in Table 7C can be derived by combining Table 7A and Table 7B:

[0314]

[0315] <Eighth Embodiment>

[0316] Please refer to Fig. 9 , which is a three-dimensional schematic diagram of an image capturing device 100 according to the eighth embodiment of the present disclosure. Fig. 9 It can be seen that the image capturing device 100 of the eighth embodiment is a camera module, and the image capturing device 100 includes an imaging lens 101, a driving device 102, and an electronic photosensitive element 103, wherein the imaging lens 101 includes the optical lens system of the present disclosure and a lens barrel (not separately labeled) that carries the optical lens system. The image capturing device 100 uses the imaging lens 101 to focus light and take an image of the object, and cooperates with the driving device 102 to focus the image, and finally forms an image on the electronic photosensitive element 103, and outputs the image data.

[0317] 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), a micro electro-mechanical system (MEMS), a piezoelectric system (Piezoelectric), or a shape memory alloy. The driving device 102 allows the imaging lens 101 to obtain a better imaging position, and can provide a clear image of the subject at different object distances. In addition, the imaging device 100 can be equipped with an electronic photosensitive element 103 (such as CMOS, CCD) with good sensitivity and low noise, which is set on the imaging surface of the optical lens system, and can truly present the good imaging quality of the optical lens system.

[0318] The imaging device 100 may further include an image stabilization module 104, which may be, for example, an accelerometer, a gyroscope, or a Hall Effect Sensor. The driving device 102 may be used in conjunction with the image stabilization module 104 to serve as an optical image stabilization (OIS) device, which adjusts the changes in different axes of the imaging lens 101 to compensate for the blurred image caused by shaking at the moment of shooting, or uses the image compensation technology in the imaging software to provide an electronic image stabilization (EIS) function, thereby further improving the image quality of dynamic and low-light scene shooting.

[0319] <Ninth Embodiment>

[0320] Please refer to Fig.10 , which is a schematic diagram of a side of an electronic device 200 according to a ninth embodiment of the present disclosure. The electronic device 200 of the ninth embodiment is a smart phone, and the electronic device 200 includes imaging devices 210 , 220 , 230 and a flash module 201 .

[0321] The imaging devices 210, 220, and 230 in the ninth embodiment may all include the optical lens system of the present disclosure, and may all be the same as or have a similar structure to the imaging device 100 in the eighth embodiment, and will not be described in detail. Specifically, the imaging device 210 may be an ultra-wide-angle imaging device, the imaging device 220 may be a wide-angle imaging device, the imaging device 230 may be a telephoto imaging device (may include an optical path turning element), or may be other types of imaging devices, and are not limited to this configuration.

[0322] <Tenth Embodiment>

[0323] Please refer to Fig.11, which is a schematic diagram of one side of an electronic device 300 according to the tenth embodiment of the present disclosure. The electronic device 300 of the tenth embodiment is a smart phone, and the electronic device 300 includes imaging devices 310, 320, 330, 340, 350, 360, 370, 380, 390 and a flash module 301. The imaging devices 310, 320, 330, 340, 350, 360, 370, 380, 390 in the tenth embodiment may all include the optical lens system of the present disclosure, and may all be the same as or have a similar structure to the imaging device 100 in the eighth embodiment, and will not be further described herein.

[0324] In detail, the imaging devices 310 and 320 may be ultra-wide-angle imaging devices, respectively; the imaging devices 330 and 340 may be wide-angle imaging devices, respectively; the imaging devices 350 and 360 may be telephoto imaging devices, respectively; the imaging devices 370 and 380 may be telephoto imaging devices (which may include optical path turning elements), respectively; the imaging device 390 may be a TOF module (Time-Of-Flight); or may be another type of imaging device, and is not limited to this configuration.

[0325] <Eleventh Embodiment>

[0326] Please refer to Fig. 12A as well as Fig. 12B ,in Fig. 12A A schematic diagram showing one side of an electronic device 400 according to an eleventh embodiment of the present disclosure is shown. Fig. 12B Draw according to Fig. 12A Schematic diagram of the other side of the electronic device 400. Fig. 12A as well as Fig. 12B It can be seen that the electronic device 400 of the eleventh embodiment is a smart phone, and the electronic device 400 includes imaging devices 410 , 420 , 430 , 440 and a user interface 404 .

[0327] Specifically, the imaging device 410 can capture images corresponding to a non-circular opening on the outside of the electronic device 400, and the imaging devices 420, 430, and 440 are respectively telephoto imaging devices, wide-angle imaging devices, and ultra-wide-angle imaging devices, or can be other types of imaging devices, and are not limited to this configuration.

[0328] <Twelfth Embodiment>

[0329] Please refer to Fig.13 , which illustrates a three-dimensional schematic diagram of an electronic device 500 according to the twelfth embodiment of the present disclosure. Fig.13 It can be seen that the electronic device 500 of the twelfth embodiment is a head-mounted device, and the electronic device 500 includes a body 507 and imaging devices 510 and 520 .

[0330] In detail, the imaging devices 510 and 520 are disposed on the main body 507 and can be located on both sides of the main body 507. The imaging devices 510 and 520 in the twelfth embodiment can both include the optical lens system of the present disclosure, and can both be the same as or have a similar structure to the imaging device 100 in the aforementioned eighth embodiment, which will not be further described here.

[0331] <Thirteenth Embodiment>

[0332] Please refer to Fig.14 , which illustrates a three-dimensional schematic diagram of an electronic device 600 according to the thirteenth embodiment of the present disclosure. Fig.14 It can be seen that the electronic device 600 of the thirteenth embodiment is a drone, which includes an imaging device 610. The imaging device 610 may include the optical lens system of the present disclosure, and may be the same as or have a similar structure to the imaging device 100 in the eighth embodiment, and will not be described in detail herein.

[0333] <Fourteenth Embodiment>

[0334] Please refer to Fig.15 , which shows a top view of a vehicle tool 700 according to the fourteenth embodiment of the present disclosure. Fig.15 As shown, the vehicle tool 700 includes a plurality of imaging devices 710. The imaging devices 710 may include the optical lens system of the present disclosure, and may be the same as or have a similar structure to the imaging device 100 in the aforementioned eighth embodiment, and will not be further described herein.

[0335] Specifically, the imaging device 710 may be disposed at the front side, rear side, rearview mirror, door gaps on both sides, or other locations of the vehicle tool 700, and is not limited to this configuration.

[0336] Although the present disclosure has been disclosed in the above implementation mode, it is not intended to limit the present disclosure. Anyone familiar with this technology can make various changes and modifications without departing from the spirit and scope of the present disclosure. Therefore, the scope of protection of the present disclosure should be determined by the attached claims.

Claims

1. An optical lens system, characterized in that: The optical lens system sequentially includes six lenses from the object side to the image side, and the six lenses are, from the object side to the image side: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens; each of the lenses has an object-side surface facing the object side and an image-side surface facing the image side; wherein, the image-side surface of the second lens is concave near the optical axis; the third lens has a positive refractive power; the image-side surface of the fourth lens is concave near the optical axis; and the image-side surface of the sixth lens includes at least one inflection point; wherein, the focal length of the optical lens system is f, the focal length of the first lens is f1, the combined focal length of the first lens and the second lens is f12, the thickness of the first lens on the optical axis is CT1, the distance between the first lens and the second lens on the optical axis is T12, the radius of curvature of the image-side surface of the fifth lens is R10, the radius of curvature of the object-side surface of the sixth lens is R11, the distance on the optical axis from the object-side surface of the first lens to the image-side surface of the sixth lens is TD, the distance on the optical axis from the object-side surface of the first lens to an imaging surface is TL, and they satisfy the following conditions: 0.25 < (CT1 + T12) / TD < 0.40; 0.20 < R11 / R10 < 3.30; 6.00 < TL / f < 13.00; -1.60 < |R11| / f12 < -0.50; and -6.40 < f1 / CT1 < 0.

00.

2. The optical lens system according to claim 1, wherein: The first lens has a negative refractive power, and the image-side surface of the first lens is concave near the optical axis; the object-side surface of the third lens is convex near the optical axis.

3. The optical lens system according to claim 1, wherein: The image-side surface of the third lens is convex near the optical axis; the object-side surface of the fifth lens is convex near the optical axis; there is an air gap on the optical axis between any two adjacent lenses among the six lenses.

4. The optical lens system according to claim 1, wherein: The radius of curvature of the object-side surface of the sixth lens is R11, and the radius of curvature of the image-side surface of the sixth lens is R12, and they satisfy the following conditions: 0.9 < |R12 / R11| < 20.

0.

5. The optical lens system according to claim 1, wherein: The distance between the fourth lens and the fifth lens on the optical axis is T45, and the distance between the fifth lens and the sixth lens on the optical axis is T56, and they satisfy the following conditions: 0.05 < T56 / T45 < 10.

00.

6. The optical lens system according to claim 1, wherein: The focal length of the first lens is f1, the distance on the optical axis from the image-side surface of the sixth lens to the imaging surface is BL, and the thickness of the first lens on the optical axis is CT1, and they satisfy the following conditions: -2.60 < f1 / BL < 0.00; and -5.50 < f1 / CT1 < -2.

00.

7. The optical lens system according to claim 1, wherein: The thickness of the second lens on the optical axis is CT2, and the thickness of the fourth lens on the optical axis is CT4, and they satisfy the following conditions: 0.65 < CT2 / CT4 < 1.

70.

8. The optical lens system according to claim 1, wherein: It further includes: a diaphragm, disposed between the second lens and the third lens.

9. The optical lens system according to claim 1, wherein: The Abbe number of the first lens is V1, the Abbe number of the second lens is V2, the Abbe number of the third lens is V3, the Abbe number of the fourth lens is V4, the Abbe number of the fifth lens is V5, the Abbe number of the sixth lens is V6, and the minimum value among V1, V2, V3, V4, V5, and V6 is Vmin, which satisfies the following conditions: 8.0 ≤ Vmin ≤ 22.

0.

10. The optical lens system according to claim 1, wherein: The radius of curvature of the image-side surface of the third lens is R6, and the radius of curvature of the image-side surface of the fourth lens is R8, which satisfies the following conditions: -20.00 < R6 / R8 < -0.

20.

11. The optical lens system according to claim 1, wherein: The horizontal displacement on the optical axis from the intersection point of the object-side surface of the first lens on the optical axis to the position of the maximum effective radius of the object-side surface of the first lens is SAG1R1, and the horizontal displacement on the optical axis from the intersection point of the image-side surface of the first lens on the optical axis to the position of the maximum effective radius of the image-side surface of the first lens is SAG1R2. The maximum effective radius of the object-side surface of the first lens is Y1R1, and the maximum effective radius of the object-side surface of the second lens is Y2R1, which satisfies the following conditions: 1.00 < SAG1R2 / SAG1R1 < 4.50; and 1.60 < Y1R1 / Y2R1 < 4.

50.

12. The optical lens system according to claim 1, wherein: The distance parallel to the optical axis from the position of the maximum effective diameter of the optical effective area of the object-side surface of the first lens to the position of the maximum effective diameter of the optical effective area of the image-side surface of the first lens is ET1, and the distance parallel to the optical axis from the position of the maximum effective diameter of the optical effective area of the object-side surface of the fifth lens to the position of the maximum effective diameter of the optical effective area of the image-side surface of the fifth lens is ET5, which satisfies the following conditions: 1.50 < ET1 / ET5 < 5.

00.

13. An imaging device, characterized in that: Comprising: The optical lens system according to claim 1; and An electronic photosensitive element disposed on the imaging surface of the optical lens system.

14. An electronic device, characterized in that: Comprising: The imaging device according to claim 13.

15. An optical lens system, characterized in that: The optical lens system sequentially includes six lenses from the object side to the image side, and the six lenses from the object side to the image side are: A first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens; each of the lenses has an object-side surface facing the object side and an image-side surface facing the image side; Wherein, the image-side surface of the second lens is concave near the optical axis; The third lens has a positive refractive power, its object-side surface is convex near the optical axis, and its image-side surface is convex near the optical axis; The image-side surface of the fourth lens is concave near the optical axis; The object-side surface of the fifth lens is convex near the optical axis; and The image-side surface of the sixth lens includes at least one inflection point; Among them, there is an air gap on the optical axis between any two adjacent lenses of the six lenses; the focal length of the optical lens system is f, the thickness of the first lens on the optical axis is CT1, the distance between the first lens and the second lens on the optical axis is T12, the distance between the second lens and the third lens on the optical axis is T23, the distance between the fourth lens and the fifth lens on the optical axis is T45, the radius of curvature of the image-side surface of the fifth lens is R10, the radius of curvature of the object-side surface of the sixth lens is R11, the distance on the optical axis from the object-side surface of the first lens to the image-side surface of the sixth lens is TD, and the distance on the optical axis from the object-side surface of the first lens to an imaging surface is TL, which satisfy the following conditions: 0.22 < (CT1 + T12) / TD < 0.45; 0.20 < R11 / R10 < 1.50; 6.00 < TL / f < 13.00; and 0.04 < T45 / T23 < 1.

10.

16. The optical lens system according to claim 15, wherein: The first lens has a negative refractive power, the image-side surface of the first lens near the optical axis is concave, and the image-side surface of the sixth lens includes at least one concave critical point.

17. The optical lens system according to claim 15, wherein: The radius of curvature of the image-side surface of the fourth lens is R8, and the radius of curvature of the object-side surface of the fifth lens is R9, which satisfy the following conditions: 0.20 < R8 / R9 < 2.

50.

18. The optical lens system according to claim 15, wherein: The distance on the optical axis from the object-side surface of the first lens to the imaging surface is TL, and the maximum image height of the optical lens system is ImgH, which satisfy the following conditions: 2.50 < TL / ImgH < 5.

50.

19. The optical lens system of claim 15, wherein: The image-side surface of the fourth lens includes at least one inflection point. The distance parallel to the optical axis from the position of the maximum effective diameter of the optical effective area of the object-side surface of the fourth lens to the position of the maximum effective diameter of the optical effective area of the image-side surface of the fourth lens is ET4, and the thickness of the fourth lens on the optical axis is CT4, which satisfy the following conditions: 0.75 < ET4 / CT4 < 2.

00.

20. The optical lens system of claim 15, wherein: The object-side surface of the sixth lens includes at least one inflection point. The maximum image height of the optical lens system is ImgH, and the maximum effective radius of the image-side surface of the sixth lens is Y6R2, which satisfy the following conditions: 1.20 < ImgH / Y6R2 < 2.

20.

21. The optical lens system of claim 15, wherein: The focal length of the optical lens system is f, and half of the maximum viewing angle of the optical lens system is HFOV, which satisfy the following conditions: 0.0mm < f / tan(HFOV) < 1.0mm.

22. The optical lens system of claim 15, wherein: At least two of the six lenses are made of plastic, and at least two of the six lenses have aspherical surfaces on both the object-side surface and the image-side surface.

23. An optical lens system, characterized in that: The optical lens system sequentially includes six lenses from the object side to the image side, and the six lenses from the object side to the image side are: A first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens; each of the lenses has an object-side surface facing the object side and an image-side surface facing the image side; Among them, the image-side surface of the second lens near the optical axis is concave; The image-side surface of the third lens near the optical axis is convex; The image-side surface of the fourth lens near the optical axis is concave; The object-side surface of the fifth lens near the optical axis is convex; and The image-side surface of the sixth lens includes at least one inflection point; Wherein, the focal length of the optical lens system is f, the focal length of the first lens is f1, the combined focal length of the first lens and the second lens is f12, the thickness of the first lens on the optical axis is CT1, the thickness of the sixth lens on the optical axis is CT6, the distance between the first lens and the second lens on the optical axis is T12, the radius of curvature of the object-side surface of the sixth lens is R11, the distance on the optical axis from the object-side surface of the first lens to the image-side surface of the sixth lens is TD, and the distance on the optical axis from the object-side surface of the first lens to an imaging surface is TL, which satisfy the following conditions: 0.25 < (CT1 + T12) / TD < 0.40; -1.60 < |R11| / f12 < -0.50; 1.0 < f / CT1 < 2.3; -0.40 < f1 / TL < 0.00; and 10 < TD / CT6 < 21.

24. The optical lens system of claim 23, wherein: The first lens has a negative refractive power, and the image-side surface of the first lens near the optical axis is concave; the third lens has a positive refractive power, and the object-side surface of the third lens near the optical axis is convex.

25. The optical lens system of claim 23, wherein: The F-number of the optical lens system is Fno, which satisfies the following conditions: 1.5 < Fno < 2.

1.

26. The optical lens system of claim 23, wherein: The combined focal length of the first lens and the second lens is f12, and the distance on the optical axis from the image-side surface of the sixth lens to the imaging surface is BL, which satisfies the following conditions: -1.5 < f12 / BL < -0.

1.

27. The optical lens system of claim 23, wherein: The thickness of the second lens on the optical axis is CT2, and the thickness of the fourth lens on the optical axis is CT4, which satisfies the following conditions: 0.65 < CT2 / CT4 < 1.

70.

28. The optical lens system of claim 23, wherein: The radius of curvature of the object-side surface of the sixth lens is R11, and the radius of curvature of the image-side surface of the sixth lens is R12, which satisfies the following conditions: -35 < (R11 + R12) / (R11 - R12) < 0.

5.

29. The optical lens system of claim 23, wherein: The Abbe number of the second lens is V2, and the Abbe number of the third lens is V3, which satisfies the following conditions: 0.75 < V2 / V3 < 1.

32.

30. The optical lens system of claim 23, wherein: The focal length of the optical lens system is f, the focal length of the first lens is f1, the combined focal length of the first lens and the second lens is f12, the thickness of the first lens on the optical axis is CT1, the thickness of the sixth lens on the optical axis is CT6, the distance between the first lens and the second lens on the optical axis is T12, the radius of curvature of the image-side surface of the fifth lens is R10, the radius of curvature of the object-side surface of the sixth lens is R11, the distance between the second lens and the third lens on the optical axis is T23, the distance between the fourth lens and the fifth lens on the optical axis is T45, the distance on the optical axis from the object-side surface of the first lens to the image-side surface of the sixth lens is TD, and the distance on the optical axis from the object-side surface of the first lens to the imaging surface is TL, which satisfy the following conditions: 0.28 ≤ (CT1 + T12) / TD ≤ 0.37; 0.39≤R11 / R10≤0.96; 6.74≤TL / f≤10.11; -4.72≤f1 / CT1≤-2.85; -1.16≤|R11| / f12≤-0.67; 0.06≤T45 / T23≤0.28; 1.30≤f / CT1≤2.02; -0.29≤f1 / TL≤-0.25; and 12.16≤TD / CT6≤16.65.

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