Optical lenses and electronic devices

Abstract

The present invention provides an optical lens and an electronic device. The optical lens includes, in order from the object side to the image side along the optical axis: a first lens, the first lens having negative optical power, the first side surface of the first lens being a convex surface, and the second side surface of the first lens being a concave surface; a second lens, the second lens having positive optical power, and at least one of the first side surface and the second side surface of the second lens being a convex surface; a third lens, the third lens having optical power, and at least one of the first side surface and the second side surface of the third lens being a convex surface; and a fourth lens, the fourth lens having optical power. The present invention solves the problem that optical lenses in the prior art have difficulty in simultaneously taking into account large aperture, high resolution, miniaturization, small front-end diameter, small impact on resolution at high and low temperatures, wide operating temperature range, and long focal length and large field of view.

Description

Technical Field

[0001] The present invention relates to the technical field of optical imaging equipment, and in particular to an optical lens and electronic equipment. Background Art

[0002] With the advancement of technology and society, automated driving assistance systems are maturing. Optical lenses are becoming increasingly diverse. For example, automotive lenses are key components for automated driving assistance systems to acquire external information. With the rapid development of automated driving assistance systems, the demand for automotive lenses is increasing, with a trend towards higher resolution and miniaturization. To meet the requirements of safe driving and special installation locations, automotive lenses in automated driving assistance systems have more specific requirements than ordinary optical lenses.

[0003] The prior art provides an optical lens with low light transmission capacity, making it inadequate for dim environments at night or on rainy days. Another prior art optical lens, while capable of achieving megapixel resolution, suffers from significant aberrations such as chromatic aberration, astigmatism, and distortion, resulting in poor resolution. Another prior art optical lens fails to simultaneously meet the requirements of a small front-end diameter and miniaturization. Furthermore, to reduce costs and achieve lightweight design, prior art automotive lenses typically use plastic lenses. However, the thermal expansion and contraction characteristics of plastic lenses are difficult to overcome, causing the optimal image plane to deviate from the chip at temperatures between -40°C and 120°C, resulting in undesirable effects such as unclear images. Highly plasticized systems also have poor thermal stability, and even after returning to room temperature from high temperatures, resolution fails to meet requirements. Furthermore, prior art telephoto lenses struggle to maintain a wide field of view, resulting in a limited field of view. Wide-field-of-view lenses struggle to maintain a long focal length, limiting central angular resolution.

[0004] In other words, the optical lenses in the existing technology have the problem of being difficult to simultaneously take into account large aperture, high resolution, miniaturization, small front-end diameter, little impact on resolution under high and low temperatures, wide operating temperature range and long focal length and large field of view. Summary of the Invention

[0005] The main purpose of the present invention is to provide an optical lens and electronic device to solve the problem that optical lenses in the prior art are difficult to simultaneously achieve large aperture, high resolution, miniaturization, small front-end diameter, little effect on resolution under high and low temperature conditions, a wide operating temperature range, and a long focal length and large field of view.

[0006] To achieve the above-mentioned object, according to one aspect of the present invention, there is provided an optical lens, comprising, in order from the object side to the image side along the optical axis: a first lens having negative optical power, a first side surface of the first lens being a convex surface, and a second side surface of the first lens being a concave surface; a second lens having positive optical power, and at least one of the first side surface and the second side surface of the second lens being a convex surface; a third lens having optical power, and at least one of the first side surface and the second side surface of the third lens being a convex surface; and a fourth lens having optical power.

[0007] Furthermore, the first side surface of the second lens is a convex surface, and the second side surface of the second lens is a convex surface.

[0008] Furthermore, the first side surface of the second lens is a concave surface, and the second side surface of the second lens is a convex surface.

[0009] Furthermore, the third lens has positive optical power, the first side surface of the third lens is a convex surface, and the second side surface of the third lens is a convex surface.

[0010] Furthermore, the third lens has negative optical power, the first side surface of the third lens is convex, and the second side surface of the third lens is concave.

[0011] Furthermore, the fourth lens has negative optical power, the first side surface of the fourth lens is concave, and the second side surface of the fourth lens is convex.

[0012] Furthermore, the fourth lens has negative optical power, the first side surface of the fourth lens is concave, and the second side surface of the fourth lens is concave.

[0013] Furthermore, the fourth lens has positive optical power, the first side surface of the fourth lens is a convex surface, and the second side surface of the fourth lens is a convex surface.

[0014] Furthermore, the first lens and / or the second lens is an aspherical lens.

[0015] Furthermore, the optical lens further includes a stop, which is arranged between the second lens and the third lens.

[0016] Furthermore, the third lens and the fourth lens are cemented together to form a cemented lens.

[0017] Furthermore, the total optical length of the optical lens, that is, the distance TTL from the center of the first side surface of the first lens of the optical lens to the center of the imaging surface of the optical lens, and the entire focal length value F of the optical lens satisfy: 3.2≤TTL / F≤6.

[0018] Furthermore, the total optical length of the optical lens, that is, the distance TTL from the center of the first side surface of the first lens of the optical lens to the center of the imaging surface of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the maximum field of view FOV of the optical lens satisfy the following relationship: TTL / H / FOV≤0.05.

[0019] Furthermore, the maximum clear aperture D of the first side surface of the first lens corresponding to the maximum field of view of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the maximum field of view FOV of the optical lens satisfy the following relationship: D / H / FOV≤0.03.

[0020] Furthermore, the total optical length of the optical lens, that is, the distance TTL from the center of the first side surface of the first lens of the optical lens to the center of the imaging surface of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the arc value θ of the maximum field of view of the optical lens satisfy the following relationship: TTL / H / θ≤2.2.

[0021] Furthermore, the maximum clear aperture D of the first side surface of the first lens corresponding to the maximum field angle of the optical lens, the image height H corresponding to the maximum field angle of the optical lens, and the arc value θ of the maximum field angle of the optical lens satisfy the following: D / H / θ≤1.2.

[0022] Furthermore, the maximum field of view FOV of the optical lens, the entire focal length value F of the optical lens, and the image height H corresponding to the maximum field of view of the optical lens satisfy: (FOV×F) / H≥65.

[0023] Furthermore, the focal length F1 of the first lens and the focal length F of the entire optical lens group satisfy: 0≤|F1 / F|≤1.8.

[0024] Furthermore, the focal length F1 of the first lens and the combined focal length F12 of the first lens and the second lens satisfy the following relationship: 0.3≤|F1 / F12|≤3.

[0025] Furthermore, the focal length F2 of the second lens element and the focal length F of the entire optical lens group satisfy the relationship: 0≤|F2 / F|≤2.

[0026] Furthermore, the combined focal length F12 of the first lens and the second lens satisfies the following relationship with the focal length F of the entire optical lens group: 0≤|F12 / F|≤4.

[0027] Furthermore, the combined focal length F34 of the third lens and the fourth lens and the entire focal length F of the optical lens group satisfy the following relationship: 1≤|F34 / F|≤12.

[0028] Furthermore, the focal length F4 of the fourth lens element and the focal length F of the entire optical lens group satisfy the relationship: 0≤|F4 / F|≤4.

[0029] Furthermore, the focal length F2 of the second lens element and the focal length F3 of the third lens element satisfy: |F2 / F3|≤2.5.

[0030] Furthermore, the entire focal length value F of the optical lens, the arc value θ of the maximum field angle of the optical lens, and the image height H corresponding to the maximum field angle of the optical lens satisfy the following relationship: 1≤(F*tan(θ / 2)) / (H / 2)≤3.

[0031] Furthermore, the entire focal length value F of the optical lens, the arc value θ of the maximum field angle of the optical lens, and the image height H corresponding to the maximum field angle of the optical lens satisfy: |(F*θ) / (HF*θ)|≤10.

[0032] Furthermore, the lens edge slope K(S2) at the maximum field angle of the second side surface of the first lens of the optical lens satisfies: arctan(1 / K(S2))≥35.

[0033] Furthermore, the lens edge slope K(S1) at the maximum field of view angle of the first side surface of the first lens of the optical lens satisfies: arctan(1 / K(S1))≤5.

[0034] Furthermore, a maximum lens edge slope Kmax(S1) of the first side surface of the first lens of the optical lens satisfies: arctan(1 / Kmax(S1))≥13.

[0035] Furthermore, the central curvature radius R1 of the first side surface of the first lens of the optical lens and the entire focal length value F of the optical lens satisfy: 0<R1 / F≤2.

[0036] Furthermore, the central thickness T1 of the first lens of the optical lens, the central curvature radius R1 of the first side surface of the first lens of the optical lens, and the central curvature radius R2 of the second side surface of the first lens of the optical lens satisfy: 0.5≤R1 / (R2+T1)≤1.5.

[0037] Furthermore, a central curvature radius R2 of the second side surface of the first lens of the optical lens and a central curvature radius R1 of the first side surface of the first lens of the optical lens satisfy: 0.4≤R2 / R1≤2.

[0038] Furthermore, a central curvature radius R6 of the first side surface of the fourth lens of the optical lens and a central curvature radius R7 of the second side surface of the fourth lens of the optical lens satisfy: -2≤R6 / R7≤0.435.

[0039] Furthermore, the air gap d2 between the second lens and the third lens and the focal length F of the entire optical lens group satisfy: d2 / F≤0.5.

[0040] Furthermore, the maximum clear aperture D of the first side surface of the first lens corresponding to the maximum field angle of the optical lens and the entire focal length F of the optical lens satisfy: |D / F|≤2.5.

[0041] Furthermore, the temperature coefficient of the refractive index of the material of the third lens of the optical lens, that is, the change in the refractive index of the material of the third lens with temperature (dn / dt) 3 Satisfies: (dn / dt) 3 ≤-2.0E-6.

[0042] Furthermore, the air gap T2 between the first lens and the second lens and the total optical length of the optical lens, that is, the distance TTL from the center of the first side surface of the first lens of the optical lens to the center of the imaging surface of the optical lens, satisfy the following relationship: 0.05≤T2 / TTL.

[0043] Furthermore, the optical back focus of the optical lens, that is, the distance BFL from the center of the second side surface of the fourth lens of the optical lens to the center of the imaging plane, and the total optical length of the optical lens, that is, the distance TTL from the center of the first side surface of the first lens of the optical lens to the center of the imaging plane of the optical lens, satisfy the following relationship: 0.02≤BFL / TTL.

[0044] Furthermore, the focal length F1 of the first lens and the focal length F2 of the second lens satisfy: 0.6≤|F1 / F2|≤2.

[0045] According to another aspect of the present invention, an optical lens is provided, comprising, in order from the object side to the image side along the optical axis: a first lens, the first lens having negative optical power; a second lens, the second lens having positive optical power; a third lens, the third lens having optical power; and a fourth lens, the fourth lens having optical power; wherein the lens edge slope K(S1) of the first side surface of the first lens of the optical lens at the maximum field of view angle satisfies the following: arctan(1 / K(S1))≤5.

[0046] Furthermore, the first side surface of the first lens is a convex surface, and the second side surface of the first lens is a concave surface.

[0047] Furthermore, the first side surface of the second lens is a convex surface, and the second side surface of the second lens is a convex surface.

[0048] Furthermore, the first side surface of the second lens is a concave surface, and the second side surface of the second lens is a convex surface.

[0049] Furthermore, the third lens has positive optical power, the first side surface of the third lens is a convex surface, and the second side surface of the third lens is a convex surface.

[0050] Furthermore, the third lens has negative optical power, the first side surface of the third lens is convex, and the second side surface of the third lens is concave.

[0051] Furthermore, the fourth lens has negative optical power, the first side surface of the fourth lens is concave, and the second side surface of the fourth lens is convex.

[0052] Furthermore, the fourth lens has negative optical power, the first side surface of the fourth lens is concave, and the second side surface of the fourth lens is concave.

[0053] Furthermore, the fourth lens has positive optical power, the first side surface of the fourth lens is a convex surface, and the second side surface of the fourth lens is a convex surface.

[0054] Furthermore, the first lens and / or the second lens is an aspherical lens.

[0055] Furthermore, the optical lens further includes a stop, which is arranged between the second lens and the third lens.

[0056] Furthermore, the third lens and the fourth lens are cemented together to form a cemented lens.

[0057] Furthermore, the total optical length of the optical lens, that is, the distance TTL from the center of the first side surface of the first lens of the optical lens to the center of the imaging surface of the optical lens, and the entire focal length value F of the optical lens satisfy: 3.2≤TTL / F≤6.

[0058] Furthermore, the total optical length of the optical lens, that is, the distance TTL from the center of the first side surface of the first lens of the optical lens to the center of the imaging surface of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the maximum field of view FOV of the optical lens satisfy the following relationship: TTL / H / FOV≤0.05.

[0059] Furthermore, the maximum clear aperture D of the first side surface of the first lens corresponding to the maximum field of view of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the maximum field of view FOV of the optical lens satisfy the following relationship: D / H / FOV≤0.03.

[0060] Furthermore, the total optical length of the optical lens, that is, the distance TTL from the center of the first side surface of the first lens of the optical lens to the center of the imaging surface of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the arc value θ of the maximum field of view of the optical lens satisfy the following relationship: TTL / H / θ≤2.2.

[0061] Furthermore, the maximum clear aperture D of the first side surface of the first lens corresponding to the maximum field angle of the optical lens, the image height H corresponding to the maximum field angle of the optical lens, and the arc value θ of the maximum field angle of the optical lens satisfy the following: D / H / θ≤1.2.

[0062] Furthermore, the maximum field of view FOV of the optical lens, the entire focal length value F of the optical lens, and the image height H corresponding to the maximum field of view of the optical lens satisfy: (FOV×F) / H≥65.

[0063] Furthermore, the focal length F1 of the first lens and the focal length F of the entire optical lens group satisfy: 0≤|F1 / F|≤1.8.

[0064] Furthermore, the focal length F1 of the first lens and the combined focal length F12 of the first lens and the second lens satisfy the following relationship: 0.3≤|F1 / F12|≤3.

[0065] Furthermore, the focal length F2 of the second lens element and the focal length F of the entire optical lens group satisfy the relationship: 0≤|F2 / F|≤2.

[0066] Furthermore, the combined focal length F12 of the first lens and the second lens satisfies the following relationship with the focal length F of the entire optical lens group: 0≤|F12 / F|≤4.

[0067] Furthermore, the combined focal length F34 of the third lens and the fourth lens and the entire focal length F of the optical lens group satisfy the following relationship: 1≤|F34 / F|≤12.

[0068] Furthermore, the focal length F4 of the fourth lens element and the focal length F of the entire optical lens group satisfy the relationship: 0≤|F4 / F|≤4.

[0069] Furthermore, the focal length F2 of the second lens element and the focal length F3 of the third lens element satisfy: |F2 / F3|≤2.5.

[0070] Furthermore, the entire focal length value F of the optical lens, the arc value θ of the maximum field angle of the optical lens, and the image height H corresponding to the maximum field angle of the optical lens satisfy the following relationship: 1≤(F*tan(θ / 2)) / (H / 2)≤3.

[0071] Furthermore, the entire focal length value F of the optical lens, the arc value θ of the maximum field angle of the optical lens, and the image height H corresponding to the maximum field angle of the optical lens satisfy: |(F*θ) / (HF*θ)|≤10.

[0072] Furthermore, the lens edge slope K(S2) at the maximum field angle of the second side surface of the first lens of the optical lens satisfies: arctan(1 / K(S2))≥35.

[0073] Furthermore, a maximum lens edge slope Kmax(S1) of the first side surface of the first lens of the optical lens satisfies: arctan(1 / Kmax(S1))≥13.

[0074] Furthermore, the central curvature radius R1 of the first side surface of the first lens of the optical lens and the entire focal length value F of the optical lens satisfy: 0<R1 / F≤2.

[0075] Furthermore, the central thickness T1 of the first lens of the optical lens, the central curvature radius R1 of the first side surface of the first lens of the optical lens, and the central curvature radius R2 of the second side surface of the first lens of the optical lens satisfy: 0.5≤R1 / (R2+T1)≤1.5.

[0076] Furthermore, a central curvature radius R2 of the second side surface of the first lens of the optical lens and a central curvature radius R1 of the first side surface of the first lens of the optical lens satisfy: 0.4≤R2 / R1≤2.

[0077] Furthermore, a central curvature radius R6 of the first side surface of the fourth lens of the optical lens and a central curvature radius R7 of the second side surface of the fourth lens of the optical lens satisfy: -2≤R6 / R7≤0.435.

[0078] Furthermore, the air gap d2 between the second lens and the third lens and the focal length F of the entire optical lens group satisfy: d2 / F≤0.5.

[0079] Furthermore, the maximum clear aperture D of the first side surface of the first lens corresponding to the maximum field angle of the optical lens and the entire focal length F of the optical lens satisfy: |D / F|≤2.5.

[0080] Furthermore, the temperature coefficient of the refractive index of the material of the third lens of the optical lens, that is, the change in the refractive index of the material of the third lens with temperature (dn / dt) 3 Satisfies: (dn / dt) 3 ≤-2.0E-6.

[0081] Furthermore, the air gap T2 between the first lens and the second lens and the total optical length of the optical lens, that is, the distance TTL from the center of the first side surface of the first lens of the optical lens to the center of the imaging surface of the optical lens, satisfy the following relationship: 0.05≤T2 / TTL.

[0082] Furthermore, the optical back focus of the optical lens, that is, the distance BFL from the center of the second side surface of the fourth lens of the optical lens to the center of the imaging plane, and the total optical length of the optical lens, that is, the distance TTL from the center of the first side surface of the first lens of the optical lens to the center of the imaging plane of the optical lens, satisfy the following relationship: 0.02≤BFL / TTL.

[0083] Furthermore, the focal length F1 of the first lens and the focal length F2 of the second lens satisfy: 0.6≤|F1 / F2|≤2.

[0084] According to another aspect of the present invention, an electronic device is provided, comprising the above-mentioned optical lens and an imaging element for converting an optical image formed by the optical lens into an electrical signal.

[0085] Applying the technical solution of the present invention, the optical lens includes a first lens, a second lens, a third lens and a fourth lens in sequence from the object side to the image side along the optical axis, the first lens has negative optical power, the first side surface of the first lens is convex, and the second side surface of the first lens is concave; the second lens has positive optical power, and at least one of the first side surface and the second side surface of the second lens is convex; the third lens has optical power, and at least one of the first side surface and the second side surface of the third lens is convex; and the fourth lens has optical power.

[0086] The first lens has negative optical power, the first side of the first lens is convex, and the second side of the first lens is concave. The first lens has negative optical power, which has a diverging effect on light passing through the first lens. Under the same field of view angle, the light emitted through the second side of the first lens can provide the subsequent optical system with a larger light receiving surface. The first side of the first lens is convex, which can collect as much light as possible from a large field of view into the rear optical system. In practical applications, it is beneficial for water droplets to slide off and reduce the impact on imaging. The second side of the first lens is concave, which can quickly diverge the large-angle light passing through the first side of the first lens, which is beneficial for the rear optical system to correct the aberration of large-angle light and achieve high resolution. The first lens is preferably made of a high refractive index material, which is beneficial for reducing the front diameter of the optical lens and improving the imaging quality. The first lens is preferably made of an aspherical lens, ensuring that the center R value of the second side of the first lens is small and steep, while the edge is relatively flat, which is beneficial for the central area to have a large angular resolution to achieve large distortion.

[0087] The second lens has positive optical power, and at least one of its first and second side surfaces is convex. When both the first and second side surfaces are convex, the second lens has positive optical power, which facilitates light convergence. The second lens is biconvex and flat, allowing diverging light to enter the rear lens smoothly, facilitating a smooth transition of light patterns. Furthermore, the second lens lowers the height at which light enters the subsequent optical system, reducing the diameter of the rear lens. The convex first side of the second lens allows light rays diverging from the first lens to bend closer to the optical axis. Furthermore, the shape of the second side of the first lens differs significantly from that of the first side of the second lens, significantly altering the light pattern. While the diameter of the first side of the second lens remains the same, the diameter of the front lens can be reduced, achieving miniaturization. The convex second side of the second lens further converges light rays converging from the front lens, allowing them to continue to converge closer to the optical axis, facilitating light convergence and reducing the diameter of the rear lens. The second lens is preferably an aspheric lens, which allows for a smooth transition of light rays from the first lens to the imaging plane, correcting some astigmatism and field curvature, and improving the resolving power of the optical system. When the first side of the second lens is concave and the second side of the second lens is convex, the second lens has positive focal power, which facilitates light convergence. The concave-convex and flat shape of the second lens allows diverging light to enter the rear smoothly, facilitating a smooth transition of light. At the same time, the second lens can lower the height of the light incident on the subsequent optical system, reducing the diameter of the rear port. The first side of the second lens is concave, which can collect as much light as possible from the front into the rear optical system and keep the light diverging from the first lens on an upward trend, facilitating a smooth transition of light. The second side of the second lens is convex, which converges the diverging light from the front and turns it closer to the optical axis, facilitating light convergence and reducing the diameter of the rear port. The second lens is preferably an aspheric lens, which can smoothly transition the light from the first lens to the imaging surface, correcting some astigmatism and field curvature, and improving the resolving power of the optical system.

[0088] The third lens has optical power, and at least one of the first and second side surfaces of the third lens is convex. When the first side surface of the third lens is convex and the second side surface of the third lens is convex, the third lens has positive optical power. At least one positive optical power lens and one negative optical power lens are connected to the front of the third lens. While changing the direction of light, they also introduce certain aberrations. The third lens has positive optical power and has a converging effect on light. By controlling the focal length of the third lens, various aberrations introduced by the positive and negative lenses in front can be effectively corrected, improving image quality and optimizing optical properties such as distortion and CRA. When the first side surface of the third lens is convex and the second side surface of the third lens is concave, the third lens has negative optical power. At least one positive optical power lens and one negative optical power lens are connected to the front of the third lens. While changing the direction of light, they also introduce certain aberrations. The third lens has negative optical power and has a diverging effect on light. By controlling the focal length of the third lens, various aberrations introduced by the positive and negative lenses in front can be effectively corrected, improving image quality and optimizing optical properties such as distortion and CRA.

[0089] The fourth lens has an optical power. When the first side surface of the fourth lens is concave and the second side surface of the fourth lens is convex, the fourth lens has a negative optical power. The fourth lens with a negative optical power has a diverging effect on light. Reasonable setting of the optical power of the fourth lens can not only further reduce aberrations, but also allow the light to effectively and smoothly transition at the end, so that the light reaches the imaging surface smoothly, reducing overall weight and cost. When the first side surface of the fourth lens is concave and the second side surface of the fourth lens is concave, the fourth lens has a negative optical power. The fourth lens with a negative optical power has a diverging effect on light. Reasonable setting of the optical power of the fourth lens can not only further reduce aberrations, but also allow the light to effectively and smoothly transition at the end, so that the light reaches the imaging surface smoothly, reducing overall weight and cost. When the first side surface of the fourth lens is convex and the second side surface of the fourth lens is convex, the fourth lens has positive optical power. The positive optical power of the fourth lens has a converging effect on light. Properly setting the optical power of the fourth lens can not only further reduce aberrations, but also effectively and smoothly converge the light at the end, allowing the light to smoothly reach the imaging surface, reducing overall weight and cost. Through the reasonable coordination of the third and fourth lenses, a smooth transition of light between the second side surface of the third lens and the first side surface of the fourth lens is guaranteed. Even if the third and fourth lenses are tilted or misaligned during the assembly process, the light flow will not be significantly changed, reducing the sensitivity of the lenses during assembly.

[0090] In addition, the optical lens of the present application also has the advantages of large aperture, high resolution, miniaturization, small front-end diameter, little effect on resolution under high and low temperatures, wide operating temperature range, and long focal length with a large field of view. BRIEF DESCRIPTION OF THE DRAWINGS

[0091] The accompanying drawings, which constitute part of this application, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an undue limitation of the present invention. In the accompanying drawings:

[0092] Figure 1 A schematic structural diagram of an optical lens according to Example 1 of the present invention is shown;

[0093] Figure 2 A schematic structural diagram of an optical lens according to Example 2 of the present invention is shown;

[0094] Figure 3 A schematic structural diagram of an optical lens according to Example 3 of the present invention is shown;

[0095] Figure 4 Schematic diagram of the structure of the optical lens of Example 4 of the present invention is shown;

[0096] Figure 5 1. A schematic structural diagram of an optical lens according to Example 5 of the present invention is shown;

[0097] Figure 6 1. A schematic structural diagram of an optical lens according to Example 6 of the present invention is shown;

[0098] Figure 7 1. A schematic structural diagram of an optical lens according to Example 7 of the present invention is shown;

[0099] Figure 8 1. A schematic structural diagram of an optical lens according to Example 8 of the present invention is shown;

[0100] Figure 9 1. A schematic structural diagram of an optical lens according to Example 9 of the present invention is shown;

[0101] Figure 10 1. A schematic structural diagram of an optical lens according to Example 10 of the present invention is shown;

[0102] Figure 11 14 is a schematic structural diagram of an optical lens according to Example 11 of the present invention;

[0103] Figure 12 A schematic structural diagram of an optical lens according to Example 12 of the present invention is shown.

[0104] The above drawings include the following reference numerals:

[0105] L1, first lens; S1, first side surface of the first lens; S2, second side surface of the first lens; L2, second lens; S3, first side surface of the second lens; S4, second side surface of the second lens; STO, aperture; L3, third lens; S6, first side surface of the third lens; S7, second side surface of the third lens; L4, fourth lens; S7, first side surface of the fourth lens; S8, second side surface of the fourth lens; L5, filter; S9, first side surface of the filter; S10, second side surface of the filter; IMA, imaging surface. DETAILED DESCRIPTION

[0106] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0107] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0108] In the present invention, unless otherwise specified, the directional words used, such as "up, down, top, bottom", usually refer to the directions shown in the drawings, or to the components themselves in the vertical, perpendicular or gravity direction; similarly, for ease of understanding and description, "inside and outside" refer to the inside and outside relative to the outline of each component itself, but the above directional words are not used to limit the present invention.

[0109] It should be noted that in this specification, the terms "first," "second," "third," etc., are used solely to distinguish one feature from another and do not limit the features. Thus, the first lens discussed below could also be referred to as the second lens or the third lens without departing from the teachings of this application.

[0110] In the drawings, the thickness, size, and shape of the lenses are slightly exaggerated for ease of illustration. Specifically, the shapes of the spherical and aspherical surfaces shown in the drawings are provided by way of example. That is, the shapes of the spherical and aspherical surfaces are not limited to those shown in the drawings. The drawings are for illustration only and are not drawn strictly to scale.

[0111] In this article, the paraxial area refers to the area near the optical axis. If the lens surface is convex and the position of the convex surface is not defined, it means that the lens surface is convex at least in the paraxial area; if the lens surface is concave and the position of the concave surface is not defined, it means that the lens surface is concave at least in the paraxial area. The surface of each lens close to the object side is called the first side surface of the lens, and the surface of each lens close to the image side is called the second side surface of the lens. The judgment of the surface shape in the paraxial area can be based on the judgment method of ordinary knowledge in this field, and the positive and negative R value (R refers to the radius of curvature of the paraxial area, usually refers to the R value on the lens database (lens data) in the optical software) is used to judge the convexity and concavity. For the first side, when the R value is positive, it is judged to be convex, and when the R value is negative, it is judged to be concave; for the second side, when the R value is positive, it is judged to be concave, and when the R value is negative, it is judged to be convex.

[0112] In exemplary embodiments, the optical lens provided herein can be used, for example, as an automotive lens. In this case, the left side is the object side, and the right side is the image side. The first side corresponds to the object side, and the second side corresponds to the image side. Light from the object side can be imaged on the image side. The second side of the optical lens is the imaging surface of the optical lens.

[0113] In exemplary embodiments, the optical lens provided herein can be used, for example, as a projection lens or a laser radar transmitter lens. In this case, the image side of the optical lens can be the image source side, and the object side can be the imaging side. Light from the image source side can be imaged on the imaging side. The second side surface of the optical lens is the image source side of the optical lens.

[0114] In order to solve the problem in the prior art that optical lenses are difficult to achieve simultaneously large aperture, high resolution, miniaturization, small front-end diameter, small impact on resolution under high and low temperature conditions, wide operating temperature range and long focal length and large field of view, the present invention provides an optical lens and an electronic device.

[0115] Example 1

[0116] like Figures 1 to 12 As shown, the optical lens includes a first lens, a second lens, a third lens and a fourth lens in sequence from the object side to the image side along the optical axis, the first lens has negative optical power, the first side surface of the first lens is convex, and the second side surface of the first lens is concave; the second lens has positive optical power, and at least one of the first side surface and the second side surface of the second lens is convex; the third lens has optical power, and at least one of the first side surface and the second side surface of the third lens is convex; the fourth lens has optical power.

[0117] The first lens has negative optical power, the first side of the first lens is convex, and the second side of the first lens is concave. The first lens has negative optical power, which has a diverging effect on light passing through the first lens. Under the same field of view angle, the light emitted through the second side of the first lens can provide the subsequent optical system with a larger light receiving surface. The first side of the first lens is convex, which can collect as much light as possible from a large field of view into the rear optical system. In practical applications, it is beneficial for water droplets to slide off and reduce the impact on imaging. The second side of the first lens is concave, which can quickly diverge the large-angle light passing through the first side of the first lens, which is beneficial for the rear optical system to correct the aberration of large-angle light and achieve high resolution. The first lens is preferably made of a high refractive index material, which is beneficial for reducing the front diameter of the optical lens and improving the imaging quality. The first lens is preferably made of an aspherical lens, ensuring that the center R value of the second side of the first lens is small and steep, while the edge is relatively flat, which is beneficial for the central area to have a large angular resolution to achieve large distortion.

[0118] The second lens has positive optical power, and at least one of its first and second side surfaces is convex. When both the first and second side surfaces are convex, the second lens has positive optical power, which facilitates light convergence. The second lens is biconvex and flat, allowing diverging light to enter the rear lens smoothly, facilitating a smooth transition of light patterns. Furthermore, the second lens lowers the height at which light enters the subsequent optical system, reducing the diameter of the rear lens. The convex first side of the second lens allows light rays diverging from the first lens to bend closer to the optical axis. Furthermore, the shape of the second side of the first lens differs significantly from that of the first side of the second lens, significantly altering the light pattern. While the diameter of the first side of the second lens remains the same, the diameter of the front lens can be reduced, achieving miniaturization. The convex second side of the second lens further converges light rays converging from the front lens, allowing them to continue to converge closer to the optical axis, facilitating light convergence and reducing the diameter of the rear lens. The second lens is preferably an aspheric lens, which allows for a smooth transition of light rays from the first lens to the imaging plane, correcting some astigmatism and field curvature, and improving the resolving power of the optical system. When the first side of the second lens is concave and the second side of the second lens is convex, the second lens has positive focal power, which facilitates light convergence. The concave-convex and flat shape of the second lens allows diverging light to enter the rear smoothly, facilitating a smooth transition of light. At the same time, the second lens can lower the height of the light incident on the subsequent optical system, reducing the diameter of the rear port. The first side of the second lens is concave, which can collect as much light as possible from the front into the rear optical system and keep the light diverging from the first lens on an upward trend, facilitating a smooth transition of light. The second side of the second lens is convex, which converges the diverging light from the front and turns it closer to the optical axis, facilitating light convergence and reducing the diameter of the rear port. The second lens is preferably an aspheric lens, which can smoothly transition the light from the first lens to the imaging surface, correcting some astigmatism and field curvature, and improving the resolving power of the optical system.

[0119] The third lens has optical power, and at least one of the first and second side surfaces of the third lens is convex. When the first side surface of the third lens is convex and the second side surface of the third lens is convex, the third lens has positive optical power. At least one positive optical power lens and one negative optical power lens are connected to the front of the third lens. While changing the direction of light, they also introduce certain aberrations. The third lens has positive optical power and has a converging effect on light. By controlling the focal length of the third lens, various aberrations introduced by the positive and negative lenses in front can be effectively corrected, improving image quality and optimizing optical properties such as distortion and CRA. When the first side surface of the third lens is convex and the second side surface of the third lens is concave, the third lens has negative optical power. At least one positive optical power lens and one negative optical power lens are connected to the front of the third lens. While changing the direction of light, they also introduce certain aberrations. The third lens has negative optical power and has a diverging effect on light. By controlling the focal length of the third lens, various aberrations introduced by the positive and negative lenses in front can be effectively corrected, improving image quality and optimizing optical properties such as distortion and CRA.

[0120] The fourth lens has an optical power. When the first side surface of the fourth lens is concave and the second side surface of the fourth lens is convex, the fourth lens has a negative optical power. The fourth lens with a negative optical power has a diverging effect on light. Reasonable setting of the optical power of the fourth lens can not only further reduce aberrations, but also allow the light to effectively and smoothly transition at the end, so that the light reaches the imaging surface smoothly, reducing overall weight and cost. When the first side surface of the fourth lens is concave and the second side surface of the fourth lens is concave, the fourth lens has a negative optical power. The fourth lens with a negative optical power has a diverging effect on light. Reasonable setting of the optical power of the fourth lens can not only further reduce aberrations, but also allow the light to effectively and smoothly transition at the end, so that the light reaches the imaging surface smoothly, reducing overall weight and cost. When the first side surface of the fourth lens is convex and the second side surface of the fourth lens is convex, the fourth lens has positive optical power. The positive optical power of the fourth lens has a converging effect on light. Properly setting the optical power of the fourth lens can not only further reduce aberrations, but also effectively and smoothly converge the light at the end, allowing the light to smoothly reach the imaging surface, reducing overall weight and cost. Through the reasonable coordination of the third and fourth lenses, a smooth transition of light between the second side surface of the third lens and the first side surface of the fourth lens is guaranteed. Even if the third and fourth lenses are tilted or misaligned during the assembly process, the light flow will not be significantly changed, reducing the sensitivity of the lenses during assembly.

[0121] In addition, the optical lens of the present application also has the advantages of large aperture, high resolution, miniaturization, small front-end diameter, little effect on resolution under high and low temperatures, wide operating temperature range, and long focal length with a large field of view.

[0122] In this embodiment, the first side of the second lens is convex, and the second side of the second lens is convex. The second lens has positive focal power, which facilitates light convergence. The second lens is biconvex and flat, allowing diverging light to enter the rear lens smoothly, facilitating a smooth transition of light trajectory. Furthermore, the second lens can lower the height at which light enters the subsequent optical system, reducing the diameter of the rear port. The first side of the second lens is convex, allowing light rays diverging from the first lens to be redirected closer to the optical axis. Furthermore, the shape of the second side of the first lens differs significantly from the first side of the second lens, significantly altering the light trajectory of the second lens. While the diameter of the first side of the second lens remains the same, the diameter of the front port of the optical lens can be reduced, achieving miniaturization. The second side of the second lens is convex, further converging light rays from the front lens, causing them to continue to be closer to the optical axis, facilitating light convergence and reducing the diameter of the rear port. The second lens is preferably an aspheric lens, which can smoothly transition light rays from the first lens to the imaging plane, partially correcting for astigmatism and field curvature, and improving the resolving power of the optical system.

[0123] In this embodiment, the first side surface of the second lens is concave, and the second side surface of the second lens is convex. The second lens has positive focal power, which facilitates light convergence. The concave-convex and flat shape of the second lens allows divergent light to enter the rear smoothly, facilitating a smooth transition of light. At the same time, the second lens can lower the height of light incident on the subsequent optical system, reducing the diameter of the rear port. The first side surface of the second lens is concave, which can collect as much light as possible from the front to enter the rear optical system and keep the light diverging from the first lens on an upward trend, facilitating a smooth transition of light. The second side surface of the second lens is convex, which converges the divergent light from the front and turns it closer to the optical axis, facilitating light convergence and reducing the diameter of the rear port. The second lens is preferably an aspheric lens, which can smoothly transition the light from the first lens to the imaging surface, correcting some astigmatism and field curvature, and improving the resolving power of the optical system.

[0124] In this embodiment, the third lens has positive optical power, a convex first side surface, and a convex second side surface. The third lens is connected to at least one positive optical power lens and one negative optical power lens in front of it. This changes the direction of light and also introduces certain aberrations. The third lens has positive optical power and converges light. By controlling the focal length of the third lens, various aberrations introduced by the positive and negative lenses in front can be effectively corrected, improving image quality and optimizing optical performance such as distortion and CRA.

[0125] In this embodiment, the third lens has negative optical power, its first side surface is convex, and its second side surface is concave. The third lens is connected to at least one positive and one negative optical power lens in front of it. This changes the direction of light and also introduces certain aberrations. The third lens's negative optical power diverges the light. By controlling the focal length of the third lens, various aberrations introduced by the positive and negative lenses in front can be effectively corrected, improving image quality and optimizing optical properties such as distortion and CRA.

[0126] In this embodiment, the fourth lens element has negative optical power, with its first side surface being concave and its second side surface being convex. The negative optical power of the fourth lens element diverges light. Properly setting the optical power of the fourth lens element can further reduce aberrations while ensuring an effective and smooth transition of light, ensuring a smooth transition to the imaging surface and reducing overall weight and cost.

[0127] In this embodiment, the fourth lens element has negative optical power, with a concave first side surface and a concave second side surface. The negative optical power of the fourth lens element diverges light. Properly setting the optical power of the fourth lens element can further reduce aberrations while ensuring an effective and smooth transition of light, ensuring a smooth transition to the imaging surface and reducing overall weight and cost.

[0128] In this embodiment, the fourth lens element has positive optical power, and its first and second side surfaces are convex. The fourth lens element with positive optical power has a converging effect on light. Properly setting the optical power of the fourth lens element can further reduce aberrations while also ensuring effective and smooth convergence of light, ensuring a smooth arrival at the imaging surface and reducing overall weight and cost.

[0129] In this embodiment, the first and second lenses are aspherical lenses. The first lens is an aspherical lens, ensuring that the center R value of the first side surface of the first lens is small and steep, while the edges are relatively flat. This facilitates high angular resolution in the central region and achieves the required large distortion. The second lens is an aspherical lens, which smoothly transitions the light from the first lens to the imaging surface, partially correcting astigmatism and field curvature, thereby improving the resolving power of the optical system. The first and second lenses are aspherical lenses, which facilitate correcting field curvature and improving the resolving power of the optical lens.

[0130] In this embodiment, the optical lens further includes an aperture, which is disposed between the second lens and the third lens. This facilitates the effective convergence of light entering the optical system, reduces the aperture of the lens at the rear end of the optical system, and reduces the assembly sensitivity of the system.

[0131] In this embodiment, the third lens and the fourth lens are glued together to form a glued lens. Through the reasonable coordination of the third lens and the fourth lens, a smooth transition of light between the second side surface of the third lens and the first side surface of the fourth lens is ensured. When the third lens and the fourth lens are tilted or misaligned with each other during the assembly process, the light trend will not change significantly, reducing the sensitivity of the lens during assembly. After the third lens and the fourth lens are glued together, the light trend on the first side surface of the fourth lens and the second side surface of the third lens is almost the same, without obvious deflection. Therefore, the light emitted by the third lens is well received by the fourth lens, reducing the loss of light in each field of view and improving the relative illumination of each field of view. The use of a glued lens can effectively eliminate the influence of ghost images on the optical lens, so that the optical lens can maintain a high resolution capability on the basis of eliminating ghost images. The use of a glued lens can fully correct various aberrations of the optical system, improve the resolution, and optimize optical properties such as distortion and CRA while maintaining a compact structure. The negative lens in the cemented lens has a higher refractive index than the positive lens, allowing light to converge effectively and smoothly at the end, ensuring a smooth arrival at the imaging surface and reducing overall weight and cost. The cemented third and fourth lenses simultaneously reduce light loss caused by reflections between the third and fourth lenses. The combination of high and low refractive indices facilitates a rapid transition of forward light, increases the aperture, and improves light throughput, facilitating night vision requirements. Furthermore, the cemented lens reduces the air gap between the third and fourth lenses, making the overall optical system more compact and reducing tolerance sensitivity, such as overall deflection, that can occur during the lens unit assembly process. The reduced air gap between the cemented third and fourth lenses reduces the overall system length, and assembling the third and fourth lenses as a single unit also reduces the number of assembly steps.

[0132] In this embodiment, the total optical length of the optical lens, i.e., the distance TTL from the center of the first side surface of the first lens element of the optical lens to the center of the imaging plane of the optical lens, and the focal length F of the entire optical lens group satisfy the following equation: 3.2 ≤ TTL / F ≤ 6. Meeting this conditional equation ensures that the total length of the optical lens system is controlled within a certain range, meeting the requirements of miniaturization while also taking into account the characteristics of low cost and long focal length. Preferably, 3.5 ≤ TTL / F ≤ 5.

[0133] In this embodiment, the total optical length of the optical lens (i.e., the distance TTL from the center of the first side surface of the first lens element of the optical lens to the center of the imaging plane of the optical lens), the image height H corresponding to the maximum field of view of the optical lens, and the maximum field of view FOV of the optical lens satisfy the following relationship: TTL / H / FOV ≤ 0.05. Meeting this conditional equation ensures the miniaturization of the optical lens. Preferably, TTL / H / FOV ≤ 0.04.

[0134] In this embodiment, the maximum clear aperture D of the first side surface of the first lens corresponding to the maximum field of view of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the maximum field of view FOV of the optical lens satisfy the following relationship: D / H / FOV ≤ 0.03. This conditional equation ensures a small front port diameter of the optical lens, facilitating miniaturization. Preferably, D / H / FOV ≤ 0.02.

[0135] In this embodiment, the total optical length of the optical lens (i.e., the distance TTL from the center of the first side surface of the first lens element of the optical lens to the center of the imaging plane of the optical lens), the image height H corresponding to the maximum field of view of the optical lens, and the arc value θ of the maximum field of view of the optical lens satisfy the following equation: TTL / H / θ ≤ 2.2. Meeting this conditional equation ensures the miniaturization of the optical lens. Preferably, TTL / H / θ ≤ 2.

[0136] In this embodiment, the maximum clear aperture D of the first side surface of the first lens corresponding to the maximum field of view of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the arc value θ of the maximum field of view of the optical lens satisfy the following equation: D / H / θ ≤ 1.2. Meeting this conditional equation ensures a small front port diameter of the optical lens, facilitating miniaturization. Preferably, D / H / θ ≤ 0.9.

[0137] In this embodiment, the maximum field of view (FOV) of the optical lens, the focal length (F) of the entire optical lens, and the image height (H) corresponding to the maximum field of view of the optical lens satisfy the following equation: (FOV × F) / H ≥ 65. Meeting this conditional equation ensures that the optical lens simultaneously achieves the advantages of telephoto and a wide field of view, balancing high central angular resolution and a wide field of view. Preferably, (FOV × F) / H ≥ 68.

[0138] In this embodiment, the focal length F1 of the first lens element satisfies the following relationship with the focal length F of the entire optical lens system: 0 ≤ |F1 / F| ≤ 1.8. This condition facilitates the proper distribution of the focal length of the first lens element and facilitates the entry of light into the optical system at a wide field of view. Preferably, 1 ≤ |F1 / F| ≤ 1.65.

[0139] In this embodiment, the focal length F1 of the first lens element and the combined focal length F12 of the first and second lenses satisfy the following condition: 0.3 ≤ |F1 / F12| ≤ 3. Meeting this conditional equation facilitates a reasonable distribution of the focal lengths of the first and second lenses, smoothing the transition between the light rays and improving image quality. Preferably, 0.4 ≤ |F1 / F12| ≤ 2.

[0140] In this embodiment, the focal length F2 of the second lens element satisfies the following relationship with the focal length F of the entire optical lens set: 0 ≤ |F2 / F| ≤ 2. Meeting this condition facilitates adjustment of the horizontal and vertical magnification ratio, rationally distributes the focal length of the second lens element, balances aberrations, reduces higher-order aberrations and distortion, and improves image quality. Preferably, 0.6 ≤ |F2 / F| ≤ 1.8.

[0141] In this embodiment, the combined focal length F12 of the first and second lenses satisfies the following relationship with the overall focal length F of the optical lens set: 0 ≤ |F12 / F| ≤ 4. Meeting this conditional equation facilitates a reasonable distribution of the focal lengths of the first and second lenses, smoothing the transition of light rays and improving image quality. Preferably, 0.5 ≤ |F12 / F| ≤ 3.5.

[0142] In this embodiment, the combined focal length F34 of the third and fourth lenses satisfies the following relationship with the overall focal length F of the optical lens: 1 ≤ |F34 / F| ≤ 12. This conditional relationship ensures that the focal lengths of the third and fourth lenses are within a certain range, controls the light distribution between the second lens and the imaging plane, reduces aberrations caused by wide-angle light entering through the second lens, and simultaneously makes the lens structure more compact, facilitating miniaturization. Preferably, 1.5 ≤ |F34 / F| ≤ 10.

[0143] In this embodiment, the focal length F4 of the fourth lens element satisfies the following relationship with the focal length F of the entire optical lens set: 0 ≤ |F4 / F| ≤ 4. This conditional relationship ensures that the focal length of the fourth lens element is within a certain range, which facilitates a smooth transition of light to the imaging plane and minimizes aberrations. Preferably, 0.5 ≤ |F4 / F| ≤ 2.5.

[0144] In this embodiment, the focal length F2 of the second lens element and the focal length F3 of the third lens element satisfy the following relationship: |F2 / F3| ≤ 2.5. This conditional relationship ensures that the focal lengths of the second and third lenses are similar, which helps smooth the transition of light and improves image quality. Preferably, |F2 / F3| ≤ 2.

[0145] In this embodiment, the optical lens's focal length F, the radian value θ of the optical lens's maximum field of view, and the image height H corresponding to the optical lens's maximum field of view satisfy the following equation: 1 ≤ (F*tan(θ / 2)) / (H / 2) ≤ 3. Meeting this conditional equation ensures that while the optical lens's field of view and image plane size remain unchanged, the focal length can be increased, achieving both high central angular resolution and a wide field of view. Preferably, 1.45 ≤ (F*tan(θ / 2)) / (H / 2) ≤ 2.75.

[0146] In this embodiment, the optical lens's focal length F, the radian value θ of the optical lens's maximum field of view, and the image height H corresponding to the optical lens's maximum field of view satisfy the following equation: |(F*θ) / (HF*θ)|≤10. Meeting this conditional equation ensures that the field of view is increased while maintaining the size of the optical lens's imaging surface, achieving high distortion. Preferably, |(F*θ) / (HF*θ)|≤8.

[0147] In this embodiment, the lens edge slope K(S2) of the second side surface of the first lens element at the maximum field of view angle satisfies the following condition: arctan(1 / K(S2))≥35. Meeting this condition ensures a large opening angle of the second side surface of the first lens element, facilitating rapid divergence of wide-angle peripheral light entering through the first lens element. This facilitates correction of wide-angle light aberrations by the rear optical system, achieving high resolution. Preferably, arctan(1 / K(S2))≥39.

[0148] In this embodiment, the lens edge slope K(S1) at the maximum field of view angle of the first side surface of the first lens of the optical lens satisfies the following condition: arctan(1 / K(S1))≤5. This condition ensures a relatively flat edge of the first side surface of the first lens. Combined with the condition 0<R1 / F≤2, wide-angle light is concentrated at the lens edge, facilitating higher central angular resolution than peripheral angular resolution, achieving both high central angular resolution and a wide field of view. Preferably, arctan(1 / K(S1))≤3.

[0149] In this embodiment, the maximum lens edge slope Kmax(S1) of the first side surface of the first lens of the optical lens satisfies the following condition: arctan(1 / Kmax(S1))≥13. Meeting this condition ensures a large maximum angle of the second side surface of the first lens, a clear transition from the center to the periphery, and the ability to distinguish between central and peripheral collection, which helps improve the central field of view angular resolution, achieving both high central angular resolution and a wide field of view. Preferably, arctan(1 / Kmax(S1))≥15.

[0150] In this embodiment, the central radius of curvature R1 of the first side surface of the first lens element of the optical lens satisfies the following relationship with the focal length F of the entire optical lens set: 0 < R1 / F ≤ 2. This conditional relationship ensures a relatively small radius of curvature of the first side surface of the first lens element. Combined with the conditional relationship arctan(1 / K(S1)) ≤ 5, this allows wide-angle light to be incident on the edge of the lens element, facilitating higher central angular resolution than peripheral angular resolution, achieving both high central angular resolution and a wide field of view. Preferably, 0 < R1 / F ≤ 1.

[0151] In this embodiment, the central thickness T1 of the first lens of the optical lens, the central curvature radius R1 of the first side surface of the first lens of the optical lens, and the central curvature radius R2 of the second side surface of the first lens of the optical lens satisfy the following relationship: 0.5 ≤ R1 / (R2 + T1) ≤ 1.5. The special shape of the first lens creates an optical path difference between the peripheral light and the central light, diverging the central light and allowing it to enter the rear optical system. This also reduces the front port diameter of the optical lens, reducing its size and facilitating miniaturization and cost reduction. Preferably, 0.7 ≤ R1 / (R2 + T1) ≤ 1.3.

[0152] In this embodiment, the central curvature radius R2 of the second side surface of the first lens of the optical lens satisfies the central curvature radius R1 of the first side surface of the first lens of the optical lens: 0.4≤R2 / R1≤2. Meeting this conditional formula is conducive to the first lens collecting more light and increasing the light transmission capacity of the system. Reasonable setting of the surface shape of the first lens is conducive to light entering the rear optical system at a larger angle. At the same time, controlling the ratio of the curvature radius of the first side surface of the first lens to the curvature radius of the second side surface within a certain range is conducive to the system achieving telephoto. Preferably, 0.45≤R2 / R1≤1.

[0153] In this embodiment, the central curvature radius R6 of the first side surface of the fourth lens element of the optical lens and the central curvature radius R7 of the second side surface of the fourth lens element of the optical lens satisfy the following relationship: -2 ≤ R6 / R7 ≤ 0.435. Meeting this conditional equation facilitates the proper distribution of the curvature radii of the sixth and seventh lenses, promotes a smooth transition of light rays, and improves image quality. Preferably, -1 ≤ R6 / R7 ≤ 0.395.

[0154] In this embodiment, the air gap d2 between the second and third lenses satisfies the following relationship with the focal length F of the optical lens set: d2 / F ≤ 0.5. Meeting this conditional equation facilitates reducing the air gap between the second and third lenses, facilitating miniaturization. Preferably, d2 / F ≤ 0.4.

[0155] In this embodiment, the maximum clear aperture D of the first side surface of the first lens, corresponding to the maximum field of view of the optical lens, and the overall focal length F of the optical lens satisfy the following equation: |D / F| ≤ 2.5. Meeting this conditional equation ensures a small front aperture of the optical lens, facilitating miniaturization. Preferably, |D / F| ≤ 2.2.

[0156] In this embodiment, the temperature coefficient of the refractive index of the material of the third lens of the optical lens, that is, the change of the refractive index of the material of the third lens with temperature (dn / dt) 3 Satisfies: (dn / dt) 3≤-2.0E-6. Meeting this conditional formula is conducive to the reasonable selection of materials with temperature coefficients for the third lens, which helps the lens maintain good resolution at high and low temperatures and has good temperature performance. Preferably, (dn / dt) 3 ≤-5.0E-6.

[0157] In this embodiment, the air gap T2 between the first and second lenses satisfies the following relationship: 0.05 ≤ T2 / TTL, relative to the total optical length of the optical lens (i.e., the distance TTL from the center of the first side surface of the first lens to the center of the imaging plane of the optical lens). This conditional relationship ensures a large air gap between the first and second lenses, allowing for sufficient divergence of dense, high-angle light rays after passing through the first lens, facilitating correction of high-angle aberrations upon entry into the back-end optical system. Preferably, 0.12 ≤ T2 / TTL.

[0158] In this embodiment, the optical back focus of the optical lens (i.e., the distance BFL from the center of the second side surface of the fourth lens element of the optical lens to the center of the imaging plane) and the total optical length of the optical lens (i.e., the distance TTL from the center of the first side surface of the first lens element of the optical lens to the center of the imaging plane of the optical lens) satisfy the following relationship: 0.02 ≤ BFL / TTL. Meeting this conditional equation ensures a guaranteed back focus while achieving miniaturization, facilitating module assembly. It also reserves space for the installation and focusing of optical elements in the optical lens, avoiding interference between components. Preferably, 0.08 ≤ BFL / TTL.

[0159] In this embodiment, the focal length F1 of the first lens element and the focal length F2 of the second lens element satisfy the following relationship: 0.6 ≤ |F1 / F2| ≤ 2. This conditional relationship ensures that the focal lengths of the first and second lenses are similar, which helps smooth the transition of light and improves image quality. Preferably, 0.8 ≤ |F1 / F2| ≤ 1.5.

[0160] Example 2

[0161] like Figures 1 to 12 As shown, the optical lens includes a first lens, a second lens, a third lens and a fourth lens in sequence from the object side to the image side along the optical axis, wherein the first lens has negative optical power; the second lens has positive optical power; the third lens has optical power; and the fourth lens has optical power; wherein the lens edge slope K(S1) at the maximum field angle of the first side surface of the first lens of the optical lens satisfies: arctan(1 / K(S1))≤5. Meeting this conditional formula ensures that the edge of the first side surface of the first lens is relatively flat, and in combination with the conditional formula '0<R1 / F≤2, large-angle light is concentrated at the edge of the lens, which is conducive to achieving an effect in which the central angular resolution is higher than the peripheral angular resolution, taking into account both the central large angular resolution and the large field angle. Preferably, arctan(1 / K(S1))≤3.

[0162] In this embodiment, the first side surface of the first lens is a convex surface, and the second side surface of the first lens is a concave surface. The first lens has a negative optical power and has a diverging effect on the light passing through the first lens. Under the same field of view angle conditions, the light emitted through the second side surface of the first lens can enable the subsequent optical system to have a larger light receiving surface. The first side surface of the first lens is a convex surface, which can collect as much light of a large field of view as possible to enter the rear optical system, and in practical applications, it is beneficial to the sliding of water droplets and reduces the impact on imaging. The second side surface of the first lens is a concave surface, which can quickly diverge the large-angle light passing through the first side surface of the first lens, which is beneficial to the rear optical system to correct the aberration of large-angle light and achieve high resolution. The first lens is preferably made of a high refractive index material, which is beneficial to reducing the front port diameter of the optical lens and improving the imaging quality. The first lens is preferably made of an aspheric lens to ensure that the center R value of the second side surface of the first lens is small and steep, while the edge is flat, which is beneficial to the central area having a large angular resolution to achieve large distortion.

[0163] In this embodiment, the first side of the second lens is convex, and the second side of the second lens is convex. The second lens has positive focal power, which facilitates light convergence. The second lens is biconvex and flat, allowing diverging light to enter the rear smoothly, facilitating a smooth transition of light trajectory. Simultaneously, the second lens can lower the height at which light enters the subsequent optical system, reducing the diameter of the rear port. The first side of the second lens is convex, allowing light diverging from the first lens to deflect closer to the optical axis. Furthermore, the shape of the second side of the first lens differs significantly from the first side of the second lens, significantly altering the light trajectory of the second lens. While the diameter of the first side of the second lens remains the same, the diameter of the front port of the optical lens can be reduced, achieving miniaturization. The second side of the second lens is convex, further converging light from the front, causing it to continue to deflect closer to the optical axis, facilitating light convergence and reducing the diameter of the rear port. The second lens is preferably an aspheric lens, which can smoothly transition light from the first lens to the imaging plane, correcting some astigmatism and field curvature, and improving the resolving power of the optical system.

[0164] In this embodiment, the first side surface of the second lens is concave, and the second side surface of the second lens is convex. The second lens has positive focal power, which is conducive to light convergence. The shape of the second lens is concave-convex and flat, allowing the divergent light to enter the rear smoothly, which is conducive to a smooth transition of the light trend. At the same time, the second lens can lower the height of the light incident on the subsequent optical system, reducing the diameter of the rear port. The first side surface of the second lens is concave, which can collect as much light as possible from the front to enter the rear optical system, and keep the light diverging from the first lens on an upward trend, which is conducive to a smooth transition of the light. The second side surface of the second lens is convex, which converges the divergent light from the front and turns it closer to the optical axis, which is conducive to converging the light and reducing the diameter of the rear port.

[0165] In this embodiment, the third lens has positive optical power, a convex first side surface, and a convex second side surface. The third lens is connected to at least one positive optical power lens and one negative optical power lens in front of it. This changes the direction of light and also introduces certain aberrations. The third lens has positive optical power and converges light. By controlling the focal length of the third lens, various aberrations introduced by the positive and negative lenses in front can be effectively corrected, improving image quality and optimizing optical performance such as distortion and CRA.

[0166] In this embodiment, the third lens has negative optical power, its first side surface is convex, and its second side surface is concave. The third lens is connected to at least one positive and one negative optical power lens in front of it. This changes the direction of light and also introduces certain aberrations. The third lens's negative optical power diverges the light. By controlling the focal length of the third lens, various aberrations introduced by the positive and negative lenses in front can be effectively corrected, improving image quality and optimizing optical properties such as distortion and CRA.

[0167] In this embodiment, the fourth lens element has negative optical power, with its first side surface being concave and its second side surface being convex. The negative optical power of the fourth lens element diverges light. Properly setting the optical power of the fourth lens element can further reduce aberrations while ensuring an effective and smooth transition of light, ensuring a smooth transition to the imaging surface and reducing overall weight and cost.

[0168] In this embodiment, the fourth lens element has negative optical power, with a concave first side surface and a concave second side surface. The negative optical power of the fourth lens element diverges light. Properly setting the optical power of the fourth lens element can further reduce aberrations while ensuring an effective and smooth transition of light, ensuring a smooth transition to the imaging surface and reducing overall weight and cost.

[0169] In this embodiment, the fourth lens has positive optical power, the first side of the fourth lens is convex, and the second side of the fourth lens is convex. The fourth lens with positive optical power has a converging effect on light. Properly setting the optical power of the fourth lens can not only further reduce aberrations, but also ensure that the light can be effectively and smoothly converged at the end, so that the light can smoothly reach the imaging surface, reducing overall weight and cost. Through the reasonable coordination of the third lens and the fourth lens, a smooth transition of light between the second side of the third lens and the first side of the fourth lens is guaranteed. Even if the third lens and the fourth lens are tilted or misaligned during the assembly process, the light path will not change significantly, reducing the sensitivity of the lenses during assembly.

[0170] In addition, the optical lens of the present application also has the advantages of large aperture, high resolution, miniaturization, small front-end diameter, little effect on resolution under high and low temperatures, wide operating temperature range, and long focal length with a large field of view.

[0171] In this embodiment, the first and second lenses are aspherical lenses. The first lens is an aspherical lens, ensuring that the center R value of the first side surface of the first lens is small and steep, while the edges are relatively flat. This facilitates high angular resolution in the central region and achieves the required large distortion. The second lens is an aspherical lens, which smoothly transitions the light from the first lens to the imaging surface, partially correcting astigmatism and field curvature, thereby improving the resolving power of the optical system. The first and second lenses are aspherical lenses, which facilitate correcting field curvature and improving the resolving power of the optical lens.

[0172] In this embodiment, the optical lens further includes an aperture, which is disposed between the second lens and the third lens. This facilitates the effective convergence of light entering the optical system, reduces the aperture of the lens at the rear end of the optical system, and reduces the assembly sensitivity of the system.

[0173] In this embodiment, the third lens and the fourth lens are glued together to form a glued lens. Through the reasonable coordination of the third lens and the fourth lens, a smooth transition of light between the second side surface of the third lens and the first side surface of the fourth lens is ensured. When the third lens and the fourth lens are tilted or misaligned with each other during the assembly process, the light trend will not change significantly, reducing the sensitivity of the lens during assembly. After the third lens and the fourth lens are glued together, the light trend on the first side surface of the fourth lens and the second side surface of the third lens is almost the same, without obvious deflection. Therefore, the light emitted by the third lens is well received by the fourth lens, reducing the loss of light in each field of view and improving the relative illumination of each field of view. The use of a glued lens can effectively eliminate the influence of ghost images on the optical lens, so that the optical lens can maintain a high resolution capability on the basis of eliminating ghost images. The use of a glued lens can fully correct various aberrations of the optical system, improve the resolution, and optimize optical properties such as distortion and CRA while maintaining a compact structure. The negative lens in the cemented lens has a higher refractive index than the positive lens, allowing light to converge effectively and smoothly at the end, ensuring a smooth arrival at the imaging surface and reducing overall weight and cost. The cemented third and fourth lenses simultaneously reduce light loss caused by reflections between the third and fourth lenses. The combination of high and low refractive indices facilitates a rapid transition of forward light, increases the aperture, and improves light throughput, facilitating night vision requirements. Furthermore, the cemented lens reduces the air gap between the third and fourth lenses, making the overall optical system more compact and reducing tolerance sensitivity, such as overall deflection, that can occur during the lens unit assembly process. The reduced air gap between the cemented third and fourth lenses reduces the overall system length, and assembling the third and fourth lenses as a single unit also reduces the number of assembly steps.

[0174] In this embodiment, the total optical length of the optical lens, i.e., the distance TTL from the center of the first side surface of the first lens element of the optical lens to the center of the imaging plane of the optical lens, and the focal length F of the entire optical lens group satisfy the following equation: 3.2 ≤ TTL / F ≤ 6. Meeting this conditional equation ensures that the total length of the optical lens system is controlled within a certain range, meeting the requirements of miniaturization while also taking into account the characteristics of low cost and long focal length. Preferably, 3.5 ≤ TTL / F ≤ 5.

[0175] In this embodiment, the total optical length of the optical lens (i.e., the distance TTL from the center of the first side surface of the first lens element of the optical lens to the center of the imaging plane of the optical lens), the image height H corresponding to the maximum field of view of the optical lens, and the maximum field of view FOV of the optical lens satisfy the following relationship: TTL / H / FOV ≤ 0.05. Meeting this conditional equation ensures the miniaturization of the optical lens. Preferably, TTL / H / FOV ≤ 0.04.

[0176] In this embodiment, the maximum clear aperture D of the first side surface of the first lens corresponding to the maximum field of view of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the maximum field of view FOV of the optical lens satisfy the following relationship: D / H / FOV ≤ 0.03. This conditional equation ensures a small front port diameter of the optical lens, facilitating miniaturization. Preferably, D / H / FOV ≤ 0.02.

[0177] In this embodiment, the total optical length of the optical lens (i.e., the distance TTL from the center of the first side surface of the first lens element of the optical lens to the center of the imaging plane of the optical lens), the image height H corresponding to the maximum field of view of the optical lens, and the arc value θ of the maximum field of view of the optical lens satisfy the following equation: TTL / H / θ ≤ 2.2. Meeting this conditional equation ensures the miniaturization of the optical lens. Preferably, TTL / H / θ ≤ 2.

[0178] In this embodiment, the maximum clear aperture D of the first side surface of the first lens corresponding to the maximum field of view of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the arc value θ of the maximum field of view of the optical lens satisfy the following equation: D / H / θ ≤ 1.2. Meeting this conditional equation ensures a small front port diameter of the optical lens, facilitating miniaturization. Preferably, D / H / θ ≤ 0.9.

[0179] In this embodiment, the maximum field of view (FOV) of the optical lens, the focal length (F) of the entire optical lens, and the image height (H) corresponding to the maximum field of view of the optical lens satisfy the following equation: (FOV × F) / H ≥ 65. Meeting this conditional equation ensures that the optical lens simultaneously achieves the advantages of telephoto and a wide field of view, balancing high central angular resolution and a wide field of view. Preferably, (FOV × F) / H ≥ 68.

[0180] In this embodiment, the focal length F1 of the first lens element satisfies the following relationship with the focal length F of the entire optical lens system: 0 ≤ |F1 / F| ≤ 1.8. This condition facilitates the proper distribution of the focal length of the first lens element and facilitates the entry of light into the optical system at a wide field of view. Preferably, 1 ≤ |F1 / F| ≤ 1.65.

[0181] In this embodiment, the focal length F1 of the first lens element and the combined focal length F12 of the first and second lenses satisfy the following condition: 0.3 ≤ |F1 / F12| ≤ 3. Meeting this conditional equation facilitates a reasonable distribution of the focal lengths of the first and second lenses, smoothing the transition between the light rays and improving image quality. Preferably, 0.4 ≤ |F1 / F12| ≤ 2.

[0182] In this embodiment, the focal length F2 of the second lens element satisfies the following relationship with the focal length F of the entire optical lens set: 0 ≤ |F2 / F| ≤ 2. Meeting this condition facilitates adjustment of the horizontal and vertical magnification ratio, rationally distributes the focal length of the second lens element, balances aberrations, reduces higher-order aberrations and distortion, and improves image quality. Preferably, 0.6 ≤ |F2 / F| ≤ 1.8.

[0183] In this embodiment, the combined focal length F12 of the first and second lenses satisfies the following relationship with the overall focal length F of the optical lens set: 0 ≤ |F12 / F| ≤ 4. Meeting this conditional equation facilitates a reasonable distribution of the focal lengths of the first and second lenses, smoothing the transition of light rays and improving image quality. Preferably, 0.5 ≤ |F12 / F| ≤ 3.5.

[0184] In this embodiment, the combined focal length F34 of the third and fourth lenses satisfies the following relationship with the overall focal length F of the optical lens: 1 ≤ |F34 / F| ≤ 12. This conditional relationship ensures that the focal lengths of the third and fourth lenses are within a certain range, controls the light distribution between the second lens and the imaging plane, reduces aberrations caused by wide-angle light entering through the second lens, and simultaneously makes the lens structure more compact, facilitating miniaturization. Preferably, 1.5 ≤ |F34 / F| ≤ 10.

[0185] In this embodiment, the focal length F4 of the fourth lens element satisfies the following relationship with the focal length F of the entire optical lens set: 0 ≤ |F4 / F| ≤ 4. This conditional relationship ensures that the focal length of the fourth lens element is within a certain range, which facilitates a smooth transition of light to the imaging plane and minimizes aberrations. Preferably, 0.5 ≤ |F4 / F| ≤ 2.5.

[0186] In this embodiment, the focal length F2 of the second lens element and the focal length F3 of the third lens element satisfy the following relationship: |F2 / F3| ≤ 2.5. This conditional relationship ensures that the focal lengths of the second and third lenses are similar, which helps smooth the transition of light and improves image quality. Preferably, |F2 / F3| ≤ 2.

[0187] In this embodiment, the optical lens's focal length F, the radian value θ of the optical lens's maximum field of view, and the image height H corresponding to the optical lens's maximum field of view satisfy the following equation: 1 ≤ (F*tan(θ / 2)) / (H / 2) ≤ 3. Meeting this conditional equation ensures that while the optical lens's field of view and image plane size remain unchanged, the focal length can be increased, achieving both high central angular resolution and a wide field of view. Preferably, 1.45 ≤ (F*tan(θ / 2)) / (H / 2) ≤ 2.75.

[0188] In this embodiment, the optical lens's focal length F, the radian value θ of the optical lens's maximum field of view, and the image height H corresponding to the optical lens's maximum field of view satisfy the following equation: |(F*θ) / (HF*θ)|≤10. Meeting this conditional equation ensures that the field of view is increased while maintaining the size of the optical lens's imaging surface, achieving high distortion. Preferably, |(F*θ) / (HF*θ)|≤8.

[0189] In this embodiment, the lens edge slope K(S2) of the second side surface of the first lens element at the maximum field of view angle satisfies the following condition: arctan(1 / K(S2))≥35. Meeting this condition ensures a large opening angle of the second side surface of the first lens element, facilitating rapid divergence of wide-angle peripheral light entering through the first lens element. This facilitates correction of wide-angle light aberrations by the rear optical system, achieving high resolution. Preferably, arctan(1 / K(S2))≥39.

[0190] In this embodiment, the maximum lens edge slope Kmax(S1) of the first side surface of the first lens of the optical lens satisfies the following condition: arctan(1 / Kmax(S1))≥13. Meeting this condition ensures a large maximum angle of the second side surface of the first lens, a clear transition from the center to the periphery, and the ability to distinguish between central and peripheral collection, which helps improve the central field of view angular resolution, achieving both high central angular resolution and a wide field of view. Preferably, arctan(1 / Kmax(S1))≥15.

[0191] In this embodiment, the central radius of curvature R1 of the first side surface of the first lens element of the optical lens satisfies the following relationship with the focal length F of the entire optical lens set: 0 < R1 / F ≤ 2. This conditional relationship ensures a relatively small radius of curvature of the first side surface of the first lens element. Combined with the conditional relationship of 0 < R1 / F ≤ 2, wide-angle light is concentrated at the edge of the lens element, facilitating higher central angular resolution than peripheral angular resolution, achieving both high central angular resolution and a wide field of view. Preferably, 0 < R1 / F ≤ 1.

[0192] In this embodiment, the central thickness T1 of the first lens of the optical lens, the central curvature radius R1 of the first side surface of the first lens of the optical lens, and the central curvature radius R2 of the second side surface of the first lens of the optical lens satisfy the following relationship: 0.5 ≤ R1 / (R2 + T1) ≤ 1.5. The special shape of the first lens creates an optical path difference between the peripheral light and the central light, diverging the central light and allowing it to enter the rear optical system. This also reduces the front port diameter of the optical lens, reducing its size and facilitating miniaturization and cost reduction. Preferably, 0.7 ≤ R1 / (R2 + T1) ≤ 1.3.

[0193] In this embodiment, the central curvature radius R2 of the second side surface of the first lens of the optical lens satisfies the central curvature radius R1 of the first side surface of the first lens of the optical lens: 0.4≤R2 / R1≤2. Meeting this conditional formula is conducive to the first lens collecting more light and increasing the light transmission capacity of the system. Reasonable setting of the surface shape of the first lens is conducive to light entering the rear optical system at a larger angle. At the same time, controlling the ratio of the curvature radius of the first side surface of the first lens to the curvature radius of the second side surface within a certain range is conducive to the system achieving telephoto. Preferably, 0.45≤R2 / R1≤1.

[0194] In this embodiment, the central curvature radius R6 of the first side surface of the fourth lens element of the optical lens and the central curvature radius R7 of the second side surface of the fourth lens element of the optical lens satisfy the following relationship: -2 ≤ R6 / R7 ≤ 0.435. Meeting this conditional equation facilitates the proper distribution of the curvature radii of the sixth and seventh lenses, promotes a smooth transition of light rays, and improves image quality. Preferably, -1 ≤ R6 / R7 ≤ 0.395.

[0195] In this embodiment, the air gap d2 between the second and third lenses satisfies the following relationship with the focal length F of the optical lens set: d2 / F ≤ 0.5. Meeting this conditional equation facilitates reducing the air gap between the second and third lenses, facilitating miniaturization. Preferably, d2 / F ≤ 0.4.

[0196] In this embodiment, the maximum clear aperture D of the first side surface of the first lens, corresponding to the maximum field of view of the optical lens, and the overall focal length F of the optical lens satisfy the following equation: |D / F| ≤ 2.5. Meeting this conditional equation ensures a small front aperture of the optical lens, facilitating miniaturization. Preferably, |D / F| ≤ 2.2.

[0197] In this embodiment, the temperature coefficient of the refractive index of the material of the third lens of the optical lens, that is, the change of the refractive index of the material of the third lens with temperature (dn / dt) 3 Satisfies: (dn / dt) 3 ≤-2.0E-6. Meeting this conditional formula is conducive to the reasonable selection of materials with temperature coefficients for the third lens, which helps the lens maintain good resolution at high and low temperatures and has good temperature performance. Preferably, (dn / dt) 3 ≤-5.0E-6.

[0198] In this embodiment, the air gap T2 between the first and second lenses satisfies the following relationship: 0.05 ≤ T2 / TTL, relative to the total optical length of the optical lens (i.e., the distance TTL from the center of the first side surface of the first lens to the center of the imaging plane of the optical lens). This conditional relationship ensures a large air gap between the first and second lenses, allowing for sufficient divergence of dense, high-angle light rays after passing through the first lens, facilitating correction of high-angle aberrations upon entry into the back-end optical system. Preferably, 0.12 ≤ T2 / TTL.

[0199] In this embodiment, the optical back focus of the optical lens (i.e., the distance BFL from the center of the second side surface of the fourth lens element of the optical lens to the center of the imaging plane) and the total optical length of the optical lens (i.e., the distance TTL from the center of the first side surface of the first lens element of the optical lens to the center of the imaging plane of the optical lens) satisfy the following relationship: 0.02 ≤ BFL / TTL. Meeting this conditional equation ensures a guaranteed back focus while achieving miniaturization, facilitating module assembly. It also reserves space for the installation and focusing of optical elements in the optical lens, avoiding interference between components. Preferably, 0.08 ≤ BFL / TTL.

[0200] In this embodiment, the focal length F1 of the first lens element and the focal length F2 of the second lens element satisfy the following relationship: 0.6 ≤ |F1 / F2| ≤ 2. This conditional relationship ensures that the focal lengths of the first and second lenses are similar, which helps smooth the transition of light and improves image quality. Preferably, 0.8 ≤ |F1 / F2| ≤ 1.5.

[0201] Optionally, the optical lens may further include a filter for correcting color deviation or a protective glass for protecting a photosensitive element located on the imaging surface.

[0202] The optical lens in the present application may use multiple lenses, such as the four lenses mentioned above. The present application does not specifically limit the specific number of spherical lenses and aspherical lenses. When focusing on imaging quality, the number of aspherical lenses can be increased. The characteristic of aspherical lenses is that the curvature changes continuously from the center of the lens to the periphery of the lens. Unlike spherical lenses with a constant curvature from the center of the lens to the periphery of the lens, aspherical lenses have better curvature radius characteristics and have the advantages of improving distortion aberration and improving astigmatism aberration. After using aspherical lenses, the aberrations that occur during imaging can be eliminated as much as possible, thereby improving imaging quality.

[0203] In an exemplary embodiment, this solution does not limit the plastic and glass of the lens. If the focus is on temperature performance, the first lens, the second lens, the third lens, and the fourth lens can all be glass lenses. Optical lenses made of glass can suppress the deviation of the back focus of the optical lens with temperature changes, thereby improving system stability. At the same time, the use of glass material can avoid lens imaging blur caused by high and low temperature changes in the use environment, which affects the normal use of the lens. For example, an optical lens with an all-glass design has a wider temperature range and can maintain stable optical performance in the range of -40°C to 105°C. Specifically, when the focus is on resolution quality and reliability, the first lens to the fourth lens can all be glass aspherical lenses. Of course, in applications where temperature stability requirements are lower, the first lens to the fourth lens in the optical lens can also be made of plastic. Making optical lenses with plastic can effectively reduce production costs. Of course, the first lens to the fourth lens in the optical lens can also be made of a combination of plastic and glass.

[0204] The present application also provides an electronic device comprising the above-described optical lens and an imaging element that converts an optical image formed by the optical lens into an electrical signal. The imaging element may be a charge coupled device (CCD) or a complementary metal oxide semiconductor (CMOS). The electronic device may be an independent imaging device such as a digital camera, or an imaging module integrated into a mobile electronic device such as a mobile phone. The electronic device is equipped with the above-described optical lens.

[0205] However, those skilled in the art will appreciate that the number of lenses comprising the optical lens can be varied to achieve the various results and advantages described herein without departing from the technical solutions claimed herein. For example, while the embodiments describe an optical lens using four lenses as an example, the optical lens is not limited to four lenses. If desired, the optical lens can also include other numbers of lenses.

[0206] The following further describes examples of specific surface shapes and parameters of the optical lens applicable to the above-mentioned embodiments with reference to the accompanying drawings.

[0207] It should be noted that any one of the following examples 1 to 12 is applicable to all embodiments of the present application.

[0208] Example 1

[0209] like Figure 1 The figure shows a schematic diagram of the optical lens structure of Example 1.

[0210] like Figure 1 As shown, the optical lens includes, from the object side to the image side, a first lens L1, a second lens L2, an aperture STO, a third lens L3, a fourth lens L4, a filter L5 and an imaging surface IMA.

[0211] The first lens L1 has negative optical power, with its first side surface S1 being convex and its second side surface S2 being concave. The second lens L2 has positive optical power, with its first side surface S3 being convex and its second side surface S4 being convex. The third lens L3 has positive optical power, with its first side surface S6 being convex and its second side surface S7 being convex. The fourth lens L4 has negative optical power, with its first side surface S7 being concave and its second side surface S8 being convex. The filter L5 has a first filter side surface S9 and a second filter side surface S10. Light from an object sequentially passes through surfaces S1 to S10 and is ultimately imaged on the imaging plane IMA.

[0212] In this example, the total effective focal length F of the optical lens is 6.205 mm, the maximum field of view FOV of the optical lens is 100.000°, and the total length TTL of the optical lens is 24.520 mm.

[0213] Table 1 shows the basic structural parameters of the optical lens of Example 1, wherein the units of the curvature radius and thickness / distance are both millimeters (mm).

[0214] SurF Radius Thickness Nd Vd 1 4.635 1.978 1.81 41.00 2 2.218 6.046 3 9.965 4.624 1.69 53.20 4 -8.950 0.100 STO INF 0.101 6 14.822 4.331 1.62 63.40 7 -4.361 0.598 1.85 23.80 8 -19.878 1.412 9 INF 1.050 1.52 64.20 10 INF 4.279 IMA / /

[0215] In Example 1 of Table 1, the surface shape of each aspheric lens can be defined by, but not limited to, the following aspheric formula:

[0216]

[0217] Where x is the distance from the vertex of the aspheric surface at a height of h along the optical axis; c is the paraxial curvature of the aspheric surface, c = 1 / R (i.e., the paraxial curvature c is the reciprocal of the radius of curvature R in Table 1 above); k is the conic coefficient; conic; A, B, C, D, E, F, and G are all high-order coefficients. Table 2 below shows the conic coefficient k and the high-order coefficients A, B, C, D, E, and F that can be used for the aspheric lens surfaces S1, S2, S3, and S4 in Example 1.

[0218] Higher order terms / 4 6 8 10 12 14 SurF K A B C D E F 1 -0.3446 -2.8720E-03 -1.6583E-04 8.6284E-06 -1.5821E-07 0.0000E+00 0.0000E+00 2 -0.7370 -6.2265E-03 -5.5533E-04 5.4786E-05 -1.9712E-06 0.0000E+00 0.0000E+00 3 0.0000 -1.7237E-04 -3.1143E-06 3.4629E-08 -1.3495E-08 3.8888E-09 1.3432E-24 4 0.0000 1.4441E-04 -7.1306E-07 -2.2052E-08 -4.6568E-08 3.2854E-09 3.1588E-26

[0219] Table 2

[0220] Example 2

[0221] like Figure 2 , which describes the optical lens of Example 2 of the present application. In this example and the following examples, for the sake of brevity, some descriptions similar to Example 1 will be omitted. Figure 2 A schematic diagram of the optical lens structure of Example 2 is shown.

[0222] like Figure 2 As shown, the optical lens includes, from the object side to the image side, a first lens L1, a second lens L2, an aperture STO, a third lens L3, a fourth lens L4, a filter L5 and an imaging surface IMA.

[0223] The first lens L1 has negative optical power, with its first side surface S1 being convex and its second side surface S2 being concave. The second lens L2 has positive optical power, with its first side surface S3 being convex and its second side surface S4 being convex. The third lens L3 has positive optical power, with its first side surface S6 being convex and its second side surface S7 being convex. The fourth lens L4 has negative optical power, with its first side surface S7 being concave and its second side surface S8 being convex. The filter L5 has a first filter side surface S9 and a second filter side surface S10. Light from an object sequentially passes through surfaces S1 to S10 and is ultimately imaged on the imaging plane IMA.

[0224] In this example, the total effective focal length F of the optical lens is 6.191 mm, the maximum field of view FOV of the optical lens is 100.000°, and the total length TTL of the optical lens is 24.714 mm.

[0225] Table 3 shows the basic structural parameters of the optical lens of Example 2, wherein the units of the curvature radius and thickness / distance are both millimeters (mm).

[0226] SurF Radius Thickness Nd Vd 1 4.643 1.978 1.81 41.00 2 2.219 5.953 3 10.062 4.586 1.69 53.20 4 -8.677 0.100 STO INF 0.129 6 15.240 4.338 1.62 63.40 7 -4.361 0.598 1.85 23.80 8 -19.537 1.412 9 INF 1.050 1.52 64.20 10 INF 4.570 IMA / /

[0227] Table 3

[0228] Table 4 below shows the conic coefficient k and the higher-order coefficients A, B, C, D, E, and F that can be used for the aspheric lens surfaces S1, S2, S3, and S4 in Example 2.

[0229] Higher order terms / 4 6 8 10 12 14 SurF K A B C D E F 1 -0.3417 -2.8676E-03 -1.6619E-04 8.6335E-06 -1.5781E-07 0.0000E+00 0.0000E+00 2 -0.7351 -6.2003E-03 -5.5472E-04 5.4177E-05 -1.9260E-06 0.0000E+00 0.0000E+00 3 0.0000 -2.5657E-04 9.9256E-06 -1.2090E-06 -4.9896E-08 1.0421E-09 -3.6253E-10 4 0.0000 1.4827E-04 -1.8319E-06 -7.7790E-08 -5.7654E-08 6.3612E-09 -1.3702E-10

[0230] Table 4

[0231] Example 3

[0232] like Figure 3 As shown, the optical lens of Example 3 of this application is described. Figure 3 A schematic diagram of the optical lens structure of Example 3 is shown.

[0233] like Figure 3 As shown, the optical lens includes, from the object side to the image side, a first lens L1, a second lens L2, an aperture STO, a third lens L3, a fourth lens L4, a filter L5 and an imaging surface IMA.

[0234] The first lens L1 has negative optical power, with its first side surface S1 being convex and its second side surface S2 being concave. The second lens L2 has positive optical power, with its first side surface S3 being convex and its second side surface S4 being convex. The third lens L3 has positive optical power, with its first side surface S6 being convex and its second side surface S7 being convex. The fourth lens L4 has negative optical power, with its first side surface S7 being concave and its second side surface S8 being convex. The filter L5 has a first filter side surface S9 and a second filter side surface S10. Light from an object sequentially passes through surfaces S1 to S10 and is ultimately imaged on the imaging plane IMA.

[0235] In this example, the total effective focal length F of the optical lens is 6.191 mm, the maximum field of view FOV of the optical lens is 120.000°, and the total length TTL of the optical lens is 24.714 mm.

[0236] Table 5 shows the basic structural parameters of the optical lens of Example 3, wherein the units of the curvature radius Radius and thickness / distance are both millimeters (mm).

[0237] SurF Radius Thickness Nd Vd 1 4.643 1.978 1.81 41.00 2 2.219 5.953 3 10.062 4.586 1.69 53.20 4 -8.677 0.100 STO INF 0.129 6 15.240 4.338 1.62 63.40 7 -4.361 0.598 1.85 23.80 8 -19.537 1.412 9 INF 1.050 1.52 64.20 10 INF 4.570 IMA / /

[0238] Table 5

[0239] Table 6 below shows the conic coefficient k and the higher-order coefficients A, B, C, D, E, and F that can be used for the aspheric lens surfaces S1, S2, S3, and S4 in Example 3.

[0240] Higher order terms / 4 6 8 10 12 14 SurF K A B C D E F 1 -0.3417 -2.8676E-03 -1.6619E-04 8.6335E-06 -1.5781E-07 0.0000E+00 0.0000E+00 2 -0.7351 -6.2003E-03 -5.5472E-04 5.4177E-05 -1.9260E-06 0.0000E+00 0.0000E+00 3 0.0000 -2.5657E-04 9.9256E-06 -1.2090E-06 -4.9896E-08 1.0421E-09 -3.6253E-10 4 0.0000 1.4827E-04 -1.8319E-06 -7.7790E-08 -5.7654E-08 6.3612E-09 -1.3702E-10

[0241] Table 6

[0242] Example 4

[0243] like Figure 4 As shown, the optical lens of Example 4 of this application is described. Figure 4 A schematic diagram of the optical lens structure of Example 4 is shown.

[0244] like Figure 4 As shown, the optical lens includes, from the object side to the image side, a first lens L1, a second lens L2, an aperture STO, a third lens L3, a fourth lens L4, a filter L5 and an imaging surface IMA.

[0245] The first lens L1 has negative optical power, with its first side surface S1 being convex and its second side surface S2 being concave. The second lens L2 has positive optical power, with its first side surface S3 being concave and its second side surface S4 being convex. The third lens L3 has positive optical power, with its first side surface S6 being convex and its second side surface S7 being convex. The fourth lens L4 has negative optical power, with its first side surface S7 being concave and its second side surface S8 being convex. The filter L5 has a first filter side surface S9 and a second filter side surface S10. Light from an object sequentially passes through surfaces S1 to S10 and is ultimately imaged on the imaging plane IMA.

[0246] In this example, the total effective focal length F of the optical lens is 6.368 mm, the maximum field of view FOV of the optical lens is 100.000°, and the total length TTL of the optical lens is 24.540 mm.

[0247] Table 7 shows the basic structural parameters of the optical lens of Example 4, where the units of the curvature radius Radius and thickness / distance are both millimeters (mm).

[0248] SurF Radius Thickness Nd Vd 1 4.492 1.710 1.81 41.00 2 2.385 4.729 3 -500.000 4.500 1.69 53.20 4 -7.086 0.100 STO INF 0.100 6 11.603 5.119 1.62 63.40 7 -5.014 0.600 1.85 23.80 8 -12.893 1.434 9 INF 1.050 1.52 64.20 10 INF 4.976 IMA / /

[0249] Table 7

[0250] Table 8 below shows the conic coefficient k and the higher-order coefficients A, B, C, D, E, and F that can be used for the aspheric lens surfaces S1, S2, S3, and S4 in Example 4.

[0251] Higher order terms / 4 6 8 10 12 14 SurF K A B C D E F 1 -0.3614 -2.6757E-03 -1.8644E-04 8.4378E-06 -1.5231E-07 0.0000E+00 0.0000E+00 2 -0.6910 -4.6861E-03 -5.8255E-04 4.5890E-05 -1.6516E-06 0.0000E+00 0.0000E+00 3 0.0000 -4.7674E-04 -3.2512E-05 -1.1983E-06 2.3180E-08 -5.7704E-08 -2.8213E-10 4 0.0000 -1.7853E-04 -1.0764E-05 -1.5139E-06 2.0582E-07 -1.4579E-08 3.9055E-10

[0252] Table 8

[0253] Example 5

[0254] like Figure 5 As shown, the optical lens of Example 5 of this application is described. Figure 5 A schematic diagram of the optical lens structure of Example 5 is shown.

[0255] like Figure 5 As shown, the optical lens includes, from the object side to the image side, a first lens L1, a second lens L2, an aperture STO, a third lens L3, a fourth lens L4, a filter L5 and an imaging surface IMA.

[0256] The first lens L1 has negative optical power, with its first side surface S1 being convex and its second side surface S2 being concave. The second lens L2 has positive optical power, with its first side surface S3 being concave and its second side surface S4 being convex. The third lens L3 has positive optical power, with its first side surface S6 being convex and its second side surface S7 being convex. The fourth lens L4 has negative optical power, with its first side surface S7 being concave and its second side surface S8 being convex. The filter L5 has a first filter side surface S9 and a second filter side surface S10. Light from an object sequentially passes through surfaces S1 to S10 and is ultimately imaged on the imaging plane IMA.

[0257] In this example, the total effective focal length F of the optical lens is 6.373 mm, the maximum field of view FOV of the optical lens is 100.000°, and the total length TTL of the optical lens is 24.489 mm.

[0258] Table 9 shows the basic structural parameters of the optical lens of Example 5, where the units of curvature radius Radius and thickness / distance are both millimeters (mm).

[0259] SurF Radius Thickness Nd Vd 1 4.492 1.711 1.81 41.00 2 2.385 4.745 3 -500.000 4.440 1.69 53.20 4 -7.079 0.100 STO INF 0.100 6 11.600 5.117 1.62 63.40 7 -5.015 0.600 1.85 23.80 8 -12.883 1.434 9 INF 1.050 1.52 64.20 10 INF 4.971 IMA / /

[0260] Table 9

[0261] Table 10 below shows the conic coefficient k and the higher-order coefficients A, B, C, D, E, and F that can be used for the aspherical lens surfaces S1, S2, S3, and S4 in Example 5.

[0262] Higher order terms / 4 6 8 10 12 14 SurF K A B C D E F 1 -0.3615 -2.6763E-03 -1.8648E-04 8.4366E-06 -1.5232E-07 0.0000E+00 0.0000E+00 2 -0.6909 -4.6815E-03 -5.8212E-04 4.5929E-05 -1.6500E-06 0.0000E+00 0.0000E+00 3 0.0000 -4.7148E-04 -3.2251E-05 -1.1811E-06 2.3839E-08 -5.7109E-08 -2.7175E-10 4 0.0000 -1.8067E-04 -1.0783E-05 -1.5147E-06 2.0548E-07 -1.4599E-08 3.9033E-10

[0263] Table 10

[0264] Example 6

[0265] like Figure 6 As shown, the optical lens of Example 6 of this application is described. Figure 6 A schematic diagram of the optical lens structure of Example 6 is shown.

[0266] like Figure 6 As shown, the optical lens includes, from the object side to the image side, a first lens L1, a second lens L2, an aperture STO, a third lens L3, a fourth lens L4, a filter L5 and an imaging surface IMA.

[0267] The first lens L1 has negative optical power, with its first side surface S1 being convex and its second side surface S2 being concave. The second lens L2 has positive optical power, with its first side surface S3 being concave and its second side surface S4 being convex. The third lens L3 has positive optical power, with its first side surface S6 being convex and its second side surface S7 being convex. The fourth lens L4 has negative optical power, with its first side surface S7 being concave and its second side surface S8 being convex. The filter L5 has a first filter side surface S9 and a second filter side surface S10. Light from an object sequentially passes through surfaces S1 to S10 and is ultimately imaged on the imaging plane IMA.

[0268] In this example, the total effective focal length F of the optical lens is 6.373 mm, the maximum field of view FOV of the optical lens is 120.000°, and the total length TTL of the optical lens is 24.489 mm.

[0269] Table 11 shows the basic structural parameters of the optical lens of Example 6, where the units of curvature radius Radius and thickness / distance are all millimeters (mm).

[0270] SurF Radius Thickness Nd Vd 1 4.492 1.711 1.81 41.00 2 2.385 4.745 3 -500.000 4.440 1.69 53.20 4 -7.079 0.100 STO INF 0.100 6 11.600 5.117 1.62 63.40 7 -5.015 0.600 1.85 23.80 8 -12.883 1.434 9 INF 1.050 1.52 64.20 10 INF 4.971 IMA / /

[0271] Table 11

[0272] Table 12 below shows the conic coefficient k and the higher-order coefficients A, B, C, D, E, and F that can be used for the aspherical lens surfaces S1, S2, S3, and S4 in Example 6.

[0273] Higher order terms / 4 6 8 10 12 14 SurF K A B C D E F 1 -0.3615 -2.6763E-03 -1.8648E-04 8.4366E-06 -1.5232E-07 0.0000E+00 0.0000E+00 2 -0.6909 -4.6815E-03 -5.8212E-04 4.5929E-05 -1.6500E-06 0.0000E+00 0.0000E+00 3 0.0000 -4.7148E-04 -3.2251E-05 -1.1811E-06 2.3839E-08 -5.7109E-08 -2.7175E-10 4 0.0000 -1.8067E-04 -1.0783E-05 -1.5147E-06 2.0548E-07 -1.4599E-08 3.9033E-10

[0274] Table 12

[0275] Example 7

[0276] like Figure 7 As shown, the optical lens of Example 7 of this application is described. Figure 7 A schematic diagram of the optical lens structure of Example 7 is shown.

[0277] like Figure 7 As shown, the optical lens includes, from the object side to the image side, a first lens L1, a second lens L2, an aperture STO, a third lens L3, a fourth lens L4, a filter L5 and an imaging surface IMA.

[0278] The first lens L1 has negative optical power, with its first side surface S1 being convex and its second side surface S2 being concave. The second lens L2 has positive optical power, with its first side surface S3 being convex and its second side surface S4 being convex. The third lens L3 has positive optical power, with its first side surface S6 being convex and its second side surface S7 being convex. The fourth lens L4 has negative optical power, with its first side surface S7 being concave and its second side surface S8 being concave. The filter L5 has a first filter side surface S9 and a second filter side surface S10. Light from an object sequentially passes through surfaces S1 to S10 and is ultimately imaged on the imaging plane IMA.

[0279] In this example, the total effective focal length F of the optical lens is 6.167 mm, the maximum field of view FOV of the optical lens is 100.000°, and the total length TTL of the optical lens is 26.249 mm.

[0280] Table 13 shows the basic structural parameters of the optical lens of Example 7, where the units of curvature radius Radius and thickness / distance are both millimeters (mm).

[0281] SurF Radius Thickness Nd Vd 1 5.336 1.957 1.81 41.00 2 2.608 7.113 3 11.014 5.500 1.69 53.20 4 -8.691 0.100 STO INF 0.606 6 10.632 2.928 1.62 63.40 7 -5.936 0.708 1.85 23.80 8 158.422 1.412 9 INF 1.050 1.52 64.20 10 INF 4.627 IMA / /

[0282] Table 13

[0283] Table 14 below shows the conic coefficient k and the higher-order coefficients A, B, C, D, E, and F that can be used for the aspheric lens surfaces S1, S2, S3, and S4 in Example 7.

[0284] Higher order terms / 4 6 8 10 12 14 SurF K A B C D E F 1 -7.36E-01 -2.0954E-03 -7.7419E-05 4.9499E-06 -9.1661E-08 -9.2516E-11 1.5122E-11 2 -6.62E-01 -4.9254E-03 -2.4453E-04 2.2971E-05 -8.2149E-07 -4.0032E-10 1.0114E-10 3 0.0000 -1.9705E-04 -1.6841E-07 -2.3392E-07 -1.3076E-08 1.8443E-09 -5.6916E-10 4 0.0000 2.0431E-04 -8.5369E-06 9.2376E-07 -6.5663E-08 2.4627E-09 -2.9661E-11

[0285] Table 14

[0286] Example 8

[0287] like Figure 8 As shown, the optical lens of Example 8 of this application is described. Figure 8 A schematic diagram of the optical lens structure of Example 8 is shown.

[0288] like Figure 8 As shown, the optical lens includes, from the object side to the image side, a first lens L1, a second lens L2, an aperture STO, a third lens L3, a fourth lens L4, a filter L5 and an imaging surface IMA.

[0289] The first lens L1 has negative optical power, with its first side surface S1 being convex and its second side surface S2 being concave. The second lens L2 has positive optical power, with its first side surface S3 being convex and its second side surface S4 being convex. The third lens L3 has positive optical power, with its first side surface S6 being convex and its second side surface S7 being convex. The fourth lens L4 has negative optical power, with its first side surface S7 being concave and its second side surface S8 being concave. The filter L5 has a first filter side surface S9 and a second filter side surface S10. Light from an object sequentially passes through surfaces S1 to S10 and is ultimately imaged on the imaging plane IMA.

[0290] In this example, the total effective focal length F of the optical lens is 6.172 mm, the maximum field of view FOV of the optical lens is 100.000°, and the total length TTL of the optical lens is 26.214 mm.

[0291] Table 15 shows the basic structural parameters of the optical lens of Example 8, where the units of curvature radius Radius and thickness / distance are all millimeters (mm).

[0292] SurF Radius Thickness Nd Vd 1 5.338 1.960 1.81 41.00 2 2.608 7.082 3 11.022 5.500 1.69 53.20 4 -8.687 0.100 STO INF 0.599 6 10.612 2.923 1.62 63.40 7 -5.947 0.702 1.85 23.80 8 162.383 1.412 9 INF 1.050 1.52 64.20 10 INF 4.639 IMA / /

[0293] Table 15

[0294] Table 16 below shows the conic coefficient k and the higher-order coefficients A, B, C, D, E, and F that can be used for the aspherical lens surfaces S1, S2, S3, and S4 in Example 8.

[0295] Higher order terms / 4 6 8 10 12 14 SurF K A B C D E F 1 -7.37E-01 -2.0962E-03 -7.7439E-05 4.9493E-06 -9.1677E-08 -9.2850E-11 1.5122E-11 2 -6.62E-01 -4.9224E-03 -2.4439E-04 2.2977E-05 -8.2138E-07 -4.2854E-10 9.5301E-11 3 0.0000 -1.9535E-04 2.0113E-09 -2.2525E-07 -1.2793E-08 1.8416E-09 -5.8542E-10 4 0.0000 2.0453E-04 -8.4379E-06 9.3340E-07 -6.5107E-08 2.4655E-09 -3.4623E-11

[0296] Table 16

[0297] Example 9

[0298] like Figure 9 As shown, the optical lens of Example 9 of the present application is described. Figure 9 A schematic diagram showing the optical lens structure of Example 9.

[0299] like Figure 9 As shown, the optical lens includes, from the object side to the image side, a first lens L1, a second lens L2, an aperture STO, a third lens L3, a fourth lens L4, a filter L5 and an imaging surface IMA.

[0300] The first lens L1 has negative optical power, with its first side surface S1 being convex and its second side surface S2 being concave. The second lens L2 has positive optical power, with its first side surface S3 being convex and its second side surface S4 being convex. The third lens L3 has positive optical power, with its first side surface S6 being convex and its second side surface S7 being convex. The fourth lens L4 has negative optical power, with its first side surface S7 being concave and its second side surface S8 being concave. The filter L5 has a first filter side surface S9 and a second filter side surface S10. Light from an object sequentially passes through surfaces S1 to S10 and is ultimately imaged on the imaging plane IMA.

[0301] In this example, the total effective focal length F of the optical lens is 6.172 mm, the maximum field of view FOV of the optical lens is 120.000°, and the total length TTL of the optical lens is 26.214 mm.

[0302] Table 17 shows the basic structural parameters of the optical lens of Example 9, where the units of curvature radius Radius and thickness / distance are both millimeters (mm).

[0303] SurF Radius Thickness Nd Vd 1 5.338 1.960 1.81 41.00 2 2.608 7.082 3 11.022 5.500 1.69 53.20 4 -8.687 0.100 STO INF 0.599 6 10.612 2.923 1.62 63.40 7 -5.947 0.702 1.85 23.80 8 162.383 1.412 9 INF 1.050 1.52 64.20 10 INF 4.639 IMA / /

[0304] Table 17

[0305] Table 18 below shows the conic coefficient k and the higher-order coefficients A, B, C, D, E, and F that can be used for the aspheric lens surfaces S1, S2, S3, and S4 in Example 9.

[0306] Higher order terms / 4 6 8 10 12 14 SurF K A B C D E F 1 -7.37E-01 -2.0962E-03 -7.7439E-05 4.9493E-06 -9.1677E-08 -9.2850E-11 1.5122E-11 2 -6.62E-01 -4.9224E-03 -2.4439E-04 2.2977E-05 -8.2138E-07 -4.2854E-10 9.5301E-11 3 0.0000 -1.9535E-04 2.0113E-09 -2.2525E-07 -1.2793E-08 1.8416E-09 -5.8542E-10 4 0.0000 2.0453E-04 -8.4379E-06 9.3340E-07 -6.5107E-08 2.4655E-09 -3.4623E-11

[0307] Table 18

[0308] Example 10

[0309] like Figure 10 As shown, the optical lens of Example 10 of the present application is described. Figure 10 A schematic diagram of the optical lens structure of Example 10 is shown.

[0310] like Figure 10 As shown, the optical lens includes, from the object side to the image side, a first lens L1, a second lens L2, an aperture STO, a third lens L3, a fourth lens L4, a filter L5 and an imaging surface IMA.

[0311] The first lens L1 has negative optical power, with its first side surface S1 being convex and its second side surface S2 being concave. The second lens L2 has positive optical power, with its first side surface S3 being convex and its second side surface S4 being convex. The third lens L3 has negative optical power, with its first side surface S6 being convex and its second side surface S7 being concave. The fourth lens L4 has positive optical power, with its first side surface S7 being convex and its second side surface S8 being convex. The filter L5 has a first filter side surface S9 and a second filter side surface S10. Light from an object sequentially passes through surfaces S1 to S10 and is ultimately imaged on the imaging plane IMA.

[0312] In this example, the total effective focal length F of the optical lens is 6.060 mm, the maximum field of view FOV of the optical lens is 100.000°, and the total length TTL of the optical lens is 24.883 mm.

[0313] Table 19 shows the basic structural parameters of the optical lens of Example 10, where the units of curvature radius Radius and thickness / distance are both millimeters (mm).

[0314] SurF Radius Thickness Nd Vd 1 4.630 1.978 1.81 41.00 2 2.178 7.286 3 11.542 2.475 1.69 53.20 4 -7.814 0.100 STO INF 2.079 6 16.435 0.499 1.92 20.90 7 6.140 2.759 1.50 81.60 8 -12.772 1.412 9 INF 1.050 1.52 64.20 10 INF 5.140 IMA / /

[0315] Table 19

[0316] Table 20 below shows the conic coefficient k and the higher-order coefficients A, B, C, D, E, and F that can be used for the aspheric lens surfaces S1, S2, S3, and S4 in Example 10.

[0317] Higher order terms / 4 6 8 10 12 14 SurF K A B C D E F 1 -3.43E-01 -3.0479E-03 -1.6432E-04 8.9674E-06 -1.6514E-07 -3.1035E-13 3.4628E-14 2 -7.42E-01 -6.8425E-03 -5.3934E-04 5.3768E-05 -1.9191E-06 1.4633E-10 1.6906E-12 3 0.0000 -5.4305E-04 1.3468E-06 -2.7110E-08 -2.3454E-10 -2.0053E-09 1.6915E-11 4 0.0000 3.3244E-04 -2.1417E-06 3.6423E-08 -3.0372E-08 1.5973E-09 4.4191E-11

[0318] Table 20

[0319] Example 11

[0320] like Figure 11 As shown, the optical lens of Example 11 of the present application is described. Figure 11 A schematic diagram of the optical lens structure of Example 11 is shown.

[0321] like Figure 11 As shown, the optical lens includes, from the object side to the image side, a first lens L1, a second lens L2, an aperture STO, a third lens L3, a fourth lens L4, a filter L5 and an imaging surface IMA.

[0322] The first lens L1 has negative optical power, with its first side surface S1 being convex and its second side surface S2 being concave. The second lens L2 has positive optical power, with its first side surface S3 being convex and its second side surface S4 being convex. The third lens L3 has negative optical power, with its first side surface S6 being convex and its second side surface S7 being concave. The fourth lens L4 has positive optical power, with its first side surface S7 being convex and its second side surface S8 being convex. The filter L5 has a first filter side surface S9 and a second filter side surface S10. Light from an object sequentially passes through surfaces S1 to S10 and is ultimately imaged on the imaging plane IMA.

[0323] In this example, the total effective focal length F of the optical lens is 6.061 mm, the maximum field of view FOV of the optical lens is 100.000°, and the total length TTL of the optical lens is 24.917 mm.

[0324] Table 21 shows the basic structural parameters of the optical lens of Example 11, where the units of curvature radius Radius and thickness / distance are both millimeters (mm).

[0325] SurF Radius Thickness Nd Vd 1 4.630 1.980 1.81 41.00 2 2.178 7.287 3 11.544 2.503 1.69 53.20 4 -7.813 0.100 STO INF 2.077 6 16.438 0.499 1.92 20.90 7 6.141 2.768 1.50 81.60 8 -12.772 1.412 9 INF 1.050 1.52 64.20 10 INF 5.138 IMA / /

[0326] Table 21

[0327] Table 22 below shows the conic coefficient k and the higher-order coefficients A, B, C, D, E, and F that can be used for the aspheric lens surfaces S1, S2, S3, and S4 in Example 11.

[0328] Higher order terms / 4 6 8 10 12 14 SurF K A B C D E F 1 -3.43E-01 -3.0477E-03 -1.6431E-04 8.9676E-06 -1.6515E-07 -9.5064E-13 4.2495E-14 2 -7.42E-01 -6.8459E-03 -5.3963E-04 5.3749E-05 -1.9196E-06 1.5702E-10 3.6897E-12 3 0.0000 -5.4334E-04 1.3213E-06 -2.8498E-08 -3.1292E-10 -2.0100E-09 1.6983E-11 4 0.0000 3.3255E-04 -2.1330E-06 3.7370E-08 -3.0331E-08 1.6086E-09 4.5237E-11

[0329] Table 22

[0330] Example 12

[0331] like Figure 12 As shown, the optical lens of Example 12 of the present application is described. Figure 12 A schematic diagram of the optical lens structure of Example 12 is shown.

[0332] like Figure 12 As shown, the optical lens includes, from the object side to the image side, a first lens L1, a second lens L2, an aperture STO, a third lens L3, a fourth lens L4, a filter L5 and an imaging surface IMA.

[0333] The first lens L1 has negative optical power, with its first side surface S1 being convex and its second side surface S2 being concave. The second lens L2 has positive optical power, with its first side surface S3 being convex and its second side surface S4 being convex. The third lens L3 has negative optical power, with its first side surface S6 being convex and its second side surface S7 being concave. The fourth lens L4 has positive optical power, with its first side surface S7 being convex and its second side surface S8 being convex. The filter L5 has a first filter side surface S9 and a second filter side surface S10. Light from an object sequentially passes through surfaces S1 to S10 and is ultimately imaged on the imaging plane IMA.

[0334] In this example, the total effective focal length F of the optical lens is 6.061 mm, the maximum field of view FOV of the optical lens is 120.000°, and the total length TTL of the optical lens is 24.917 mm.

[0335] Table 23 shows the basic structural parameters of the optical lens of Example 12, where the units of curvature radius Radius and thickness / distance are both millimeters (mm).

[0336] SurF Radius Thickness Nd Vd 1 4.630 1.980 1.81 41.00 2 2.178 7.287 3 11.544 2.503 1.69 53.20 4 -7.813 0.100 STO INF 2.077 6 16.438 0.499 1.92 20.90 7 6.141 2.768 1.50 81.60 8 -12.772 1.412 9 INF 1.050 1.52 64.20 10 INF 5.138 IMA / /

[0337] Table 23

[0338] Table 24 below shows the conic coefficient k and the higher-order coefficients A, B, C, D, E, and F that can be used for the aspheric lens surfaces S1, S2, S3, and S4 in Example 12.

[0339] Higher order terms / 4 6 8 10 12 14 SurF K A B C D E F 1 -3.43E-01 -3.0477E-03 -1.6431E-04 8.9676E-06 -1.6515E-07 -9.5064E-13 4.2495E-14 2 -7.42E-01 -6.8459E-03 -5.3963E-04 5.3749E-05 -1.9196E-06 1.5702E-10 3.6897E-12 3 0.0000 -5.4334E-04 1.3213E-06 -2.8498E-08 -3.1292E-10 -2.0100E-09 1.6983E-11 4 0.0000 3.3255E-04 -2.1330E-06 3.7370E-08 -3.0331E-08 1.6086E-09 4.5237E-11

[0340] Table 24 In summary, Examples 1 to 12 respectively satisfy the relationships shown in Table 25.

[0341]

[0342]

[0343]

[0344] Table 25

[0345] Table 26 gives the effective focal length F of the optical lenses of Examples 1 to 12, the effective focal length F1 to F4 of each lens, etc. (unit: mm).

[0346]

[0347]

[0348] Table 26

[0349] Obviously, the embodiments described above are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0350] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, tasks, devices, components and / or combinations thereof.

[0351] It should be noted that the terms "first," "second," and the like in the specification and claims of this application and the accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein.

[0352] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. An optical lens, characterized in that: The optical lens is composed of four lenses with optical power, and the four lenses with optical power are arranged in the following order from the object side to the image side along the optical axis: a first lens having negative optical power, a first side surface of the first lens being convex, and a second side surface of the first lens being concave; a second lens having positive optical power, wherein the second side surface of the second lens is a convex surface; a third lens having optical power, wherein the first side surface of the third lens is a convex surface; a fourth lens having an optical power; the optical power of the third lens is opposite in sign to the optical power of the fourth lens; The focal length F2 of the second lens satisfies the following relationship with the focal length F of the entire optical lens group: 1.164≤|F2 / F|≤1.613; the maximum field of view FOV of the optical lens, the focal length F of the entire optical lens group, and the image height H corresponding to the maximum field of view of the optical lens satisfy the following relationship: 81.008≥(FOV×F) / H≥65; the focal length F4 of the fourth lens satisfies the following relationship with the focal length F of the entire optical lens group: 1.072≤|F4 / F|≤1.562; the focal length F1 of the first lens satisfies the following relationship with the focal length F of the entire optical lens group: 0≤|F1 / F|≤1.8; the center thickness T1 of the first lens of the optical lens, the center curvature radius R1 of the first side surface of the first lens of the optical lens, and the center curvature radius R2 of the second side surface of the first lens of the optical lens satisfy the following relationship: 0.5≤R1 / (R2+T1)≤1.

5.

2. The optical lens according to claim 1, wherein: The first side surface of the second lens is a convex surface.

3. The optical lens according to claim 1, wherein: The first side surface of the second lens is a concave surface.

4. The optical lens according to claim 1, wherein: The third lens has positive optical power, and the second side surface of the third lens is a convex surface.

5. The optical lens according to claim 1, wherein: The third lens has negative optical power, and the second side surface of the third lens is concave.

6. The optical lens according to claim 1, wherein: The fourth lens has negative optical power, the first side surface of the fourth lens is concave, and the second side surface of the fourth lens is convex.

7. The optical lens according to claim 1, wherein: The fourth lens has negative optical power, the first side surface of the fourth lens is concave, and the second side surface of the fourth lens is concave.

8. The optical lens according to claim 1, wherein: The fourth lens has positive optical power, the first side surface of the fourth lens is a convex surface, and the second side surface of the fourth lens is a convex surface.

9. The optical lens according to claim 1, wherein: The first lens and the second lens are aspherical lenses.

10. The optical lens according to claim 1, wherein: The optical lens further includes a stop, which is disposed between the second lens and the third lens.

11. The optical lens according to claim 1, wherein: The third lens and the fourth lens are cemented together to form a cemented lens.

12. The optical lens according to any one of claims 1 to 11, characterized in that: The total optical length of the optical lens, that is, the distance TTL from the center of the first side surface of the first lens of the optical lens to the center of the imaging surface of the optical lens, and the entire focal length value F of the optical lens satisfy the following relationship: 3.2≤TTL / F≤6.

13. The optical lens according to any one of claims 1 to 11, characterized in that: The total optical length of the optical lens, that is, the distance TTL from the center of the first side surface of the first lens of the optical lens to the center of the imaging surface of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the maximum field of view FOV of the optical lens satisfy the following relationship: TTL / H / FOV≤0.

05.

14. The optical lens according to any one of claims 1 to 11, characterized in that: The maximum clear aperture D of the first side surface of the first lens corresponding to the maximum field of view of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the maximum field of view FOV of the optical lens satisfy the following relationship: D / H / FOV≤0.

03.

15. The optical lens according to any one of claims 1 to 11, characterized in that: The total optical length of the optical lens, that is, the distance TTL from the center of the first side surface of the first lens of the optical lens to the center of the imaging surface of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the arc value θ of the maximum field of view of the optical lens satisfy the following conditions: TTL / H / θ≤2.

2.

16. The optical lens according to any one of claims 1 to 11, characterized in that: The maximum clear aperture D of the first side surface of the first lens corresponding to the maximum field of view of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the arc value θ of the maximum field of view of the optical lens satisfy the following relationship: D / H / θ≤1.

2.

17. The optical lens according to any one of claims 1 to 11, characterized in that: The focal length F1 of the first lens and the combined focal length F12 of the first lens and the second lens satisfy the following: 0.3≤|F1 / F12|≤3.

18. The optical lens according to any one of claims 1 to 11, characterized in that: The combined focal length F12 of the first lens and the second lens satisfies the following relationship with the entire focal length F of the optical lens: 0≤|F12 / F|≤4.

19. The optical lens according to any one of claims 1 to 11, characterized in that: The combined focal length F34 of the third lens and the fourth lens satisfies the following relationship with the focal length F of the entire optical lens group: 1≤|F34 / F|≤12.

20. The optical lens according to any one of claims 1 to 11, characterized in that: The focal length F2 of the second lens and the focal length F3 of the third lens satisfy: |F2 / F3|≤2.

5.

21. The optical lens according to any one of claims 1 to 11, characterized in that: The entire focal length value F of the optical lens, the arc value θ of the maximum field angle of the optical lens, and the image height H corresponding to the maximum field angle of the optical lens satisfy the following: 1≤(F*tan(θ / 2)) / (H / 2)≤3.

22. The optical lens according to any one of claims 1 to 11, characterized in that: The entire focal length value F of the optical lens, the arc value θ of the maximum field angle of the optical lens, and the image height H corresponding to the maximum field angle of the optical lens satisfy the following: |(F*θ) / (HF*θ)|≤10.

23. The optical lens according to any one of claims 1 to 11, characterized in that: The complementary angle of the incident angle of the light at the edge of the second side surface of the first lens of the optical lens, arctan(1 / K(S2)), satisfies: 52.091≥arctan(1 / K(S2))≥35.

24. The optical lens according to any one of claims 1 to 11, characterized in that: The complementary angle of the incident angle of the light at the edge of the first side surface of the first lens of the optical lens, arctan(1 / K(S1)), satisfies: arctan(1 / K(S1))≤5.

25. The optical lens according to any one of claims 1 to 11, characterized in that: The complementary angle of the maximum incident angle of light at the edge of the first side surface of the first lens of the optical lens, arctan(1 / Kmax(S1)), satisfies the following: 20.847≥arctan(1 / Kmax(S1))≥13.

26. The optical lens according to any one of claims 1 to 11, characterized in that: A central curvature radius R1 of the first side surface of the first lens of the optical lens satisfies the following relationship with the entire focal length F of the optical lens: 0<R1 / F≤2.

27. The optical lens according to any one of claims 1 to 11, characterized in that: A central curvature radius R2 of the second side surface of the first lens of the optical lens and a central curvature radius R1 of the first side surface of the first lens of the optical lens satisfy the following relationship: 0.4≤R2 / R1≤2.

28. The optical lens according to any one of claims 1 to 11, characterized in that: A central curvature radius R6 of the first side surface of the fourth lens of the optical lens and a central curvature radius R7 of the second side surface of the fourth lens of the optical lens satisfy the following relationship: -2≤R6 / R7≤0.

435.

29. The optical lens according to any one of claims 1 to 11, characterized in that: The air gap d2 between the second lens and the third lens and the focal length F of the entire optical lens group satisfy the following: d2 / F≤0.

5.

30. The optical lens according to any one of claims 1 to 11, characterized in that: The maximum light clearance D of the first side surface of the first lens corresponding to the maximum field angle of the optical lens and the entire focal length F of the optical lens satisfy the following relationship: |D / F|≤2.

5.

31. The optical lens according to any one of claims 1 to 11, characterized in that: The air gap T2 between the first lens and the second lens and the total optical length of the optical lens, that is, the distance TTL from the center of the first side surface of the first lens of the optical lens to the center of the imaging surface of the optical lens, satisfy the following relationship: 0.05≤T2 / TTL.

32. The optical lens according to any one of claims 1 to 11, characterized in that: The optical back focus of the optical lens, that is, the distance BFL from the center of the second side surface of the fourth lens of the optical lens to the center of the imaging plane, and the total optical length of the optical lens, that is, the distance TTL from the center of the first side surface of the first lens of the optical lens to the center of the imaging plane of the optical lens, satisfy the following relationship: 0.02≤BFL / TTL.

33. The optical lens according to any one of claims 1 to 11, characterized in that: The focal length F1 of the first lens and the focal length F2 of the second lens satisfy the following relationship: 0.6≤|F1 / F2|≤2.

34. An electronic device, characterized in that: The optical lens comprises the optical lens according to any one of claims 1 to 33 and an imaging element for converting an optical image formed by the optical lens into an electrical signal.

Images