Optical lenses and electronic equipment

Abstract

The present application discloses an optical lens and an electronic device. The optical lens includes at least three lenses with optical power arranged along an optical axis, two of which are plastic lenses and the remaining lenses are glass lenses; the two plastic lenses are respectively a first plastic lens arranged first from the first side to the second side along the optical axis and a second plastic lens arranged later from the first side to the second side along the optical axis; the optical power 1 of the first plastic lens, the optical power 2 of the second plastic lens and the total optical power of the optical lens satisfy the conditional formula: 0.001≤|1 / |+|2 / |≤2.5, and the focus offset σ1 of the first plastic lens with temperature, the focus offset σ2 of the second plastic lens with temperature, the optical power 1 of the first plastic lens and the optical power 2 of the second plastic lens satisfy the conditional formula: ‑25≤σ1×1+σ2×2≤30.

Description

Technical Field

[0001] The present application relates to the field of optical elements, and more specifically, to an optical lens and an electronic device. Background Art

[0002] As car safety is increasingly valued, more and more car owners will equip their cars with a series of car safety devices. Among them, the on-board lens plays a role similar to the eyes in the process of the car sensing the external environment. It is the optical information receiving window of the on-board system and plays an important role in the vehicle's lane keeping, automatic parking assistance, brake assistance and other functions. It is becoming more and more popular among car owners. With the development of the automobile industry, on the one hand, the size of on-board cameras is required to be smaller and smaller, and the definition requirements are getting higher and higher. On the other hand, with the increasingly fierce competition in the industry, the requirements for cost control are becoming more and more stringent.

[0003] Existing automotive lenses cannot meet the requirements of the industry in many aspects. For example, the all-glass automotive lenses designed with existing technology have the problems of high lens cost and less than ideal imaging effect; the existing technology cannot simultaneously meet the requirements of high resolution and miniaturization; the existing technology cannot simultaneously meet the requirements of small front port diameter and overall miniaturization; in addition, in order to achieve the effect of reducing costs and lightweight, the existing technology causes the system to easily produce undesirable conditions such as unclear images under high and low temperature conditions; the system has poor thermal stability, and after recovering from high temperature to normal temperature, the resolution is difficult to meet the requirements. Summary of the invention

[0004] The present application provides an optical lens, which may include at least three lenses with optical power arranged along an optical axis, two of which are plastic lenses and the remaining lenses are glass lenses; the two plastic lenses are respectively a first plastic lens arranged first from the first side to the second side along the optical axis and a second plastic lens arranged later from the first side to the second side along the optical axis. The optical lens satisfies the conditional formula: 0.001≤| 1 / |+| 2 / |≤2.5 and -25≤σ1× 1+σ2× 2≤30, where 1 is the focal length of the first plastic lens, 2 is the focal length of the second plastic lens, is the total optical power of the optical lens, σ1 is the focus offset of the first plastic lens with temperature, and σ2 is the focus offset of the second plastic lens with temperature.

[0005] In one embodiment, at least one of the first plastic lens and the second plastic lens has positive optical power.

[0006] In one embodiment, the optical lens may satisfy at least one of the following conditions: 0≤|σ1× 1|≤100, 0≤|σ2× 2|≤100, where σ1 is the focus offset of the first plastic lens with temperature, σ2 is the focus offset of the second plastic lens with temperature, 1 is the focal length of the first plastic lens, 2 is the optical power of the second plastic lens.

[0007] In one embodiment, the focus offset σ1 of the first plastic lens and the focus offset σ2 of the second plastic lens with temperature and the total focal length F of the optical lens may satisfy: -250≤σ1 / F+σ2 / F≤-50.

[0008] In one embodiment, the optical lens may satisfy at least one of the following conditions: -20≤F1 / (dn / dt1), -20≤F2 / (dn / dt2)≤50, wherein F1 is the effective focal length of the first plastic lens, dn / dt1 is the refractive index temperature coefficient of the first plastic lens, F2 is the effective focal length of the second plastic lens, and dn / dt2 is the refractive index temperature coefficient of the second plastic lens.

[0009] In one embodiment, the refractive index temperature coefficient dn / dt2 of the second plastic lens and the refractive index temperature coefficient dn / dt1 of the first plastic lens may satisfy: 0≤|dn / dt2−dn / dt1|≤50.

[0010] In one embodiment, the optical power of the first plastic lens is 1. The refractive index temperature coefficient dn / dt1 of the first plastic lens and the optical power of the second plastic lens 2 and the refractive index temperature coefficient dn / dt2 of the second plastic lens may satisfy: 0≤| 1×(dn / dt1)+ 2×(dn / dt2)|≤20.

[0011] In one embodiment, the refractive index temperature coefficient dn / dt1 of the first plastic lens, the refractive index temperature coefficient dn / dt2 of the second plastic lens, the effective focal length F1 of the first plastic lens, and the effective focal length F2 of the second plastic lens may satisfy: 0≤|(dn / dt1+dn / dt2) / (F1+F2)|≤200.

[0012] In one embodiment, the optical lens may satisfy at least one of the following conditions: 0.0001≤|dn / dt1×CTE1×F1(10 -6 mm / ℃ 2 )|,0≤|dn / dt2×CTE2×F2(10-6 mm / ℃ 2 )|≤90, wherein dn / dt1 is the refractive index temperature coefficient of the first plastic lens, CTE1 is the thermal expansion coefficient of the first plastic lens, F1 is the effective focal length of the first plastic lens, dn / dt2 is the refractive index temperature coefficient of the second plastic lens, CTE2 is the thermal expansion coefficient of the second plastic lens, and F2 is the effective focal length of the second plastic lens.

[0013] In one embodiment, the refractive index temperature coefficient dn / dt1 of the first plastic lens, the thermal expansion coefficient CTE1 of the first plastic lens, and the optical power of the first plastic lens are 1 and the refractive index temperature coefficient dn / dt2 of the second plastic lens, the thermal expansion coefficient CTE2 of the second plastic lens, and the optical power of the second plastic lens 2 can satisfy: -0.0075≤dn / dt1×CTE1× 1+dn / dt2×CTE2× 2≤0.0075.

[0014] In one embodiment, the vector height SAG12 of the second side of the first plastic lens, the focus offset σ1 of the first plastic lens with temperature, the vector height SAG22 of the second side of the second plastic lens, and the focus offset σ2 of the second plastic lens with temperature may satisfy: 70≤|SAG12×σ1+SAG22×σ2|≤600.

[0015] In one embodiment, the thermal expansion coefficient CTE1 of the first plastic lens, the thermal expansion coefficient CTE2 of the second plastic lens and the total optical power of the optical lens Can meet: 100≤CTE1× +CTE2× ≤650.

[0016] In one embodiment, the optical lens satisfies at least one of the following conditions: -1.5≤(R11-R12) / (R11+R12)≤8; -5≤(R21-R22) / (R21+R22)≤5; wherein R11 is the radius of curvature of the first side surface of the first plastic lens, R12 is the radius of curvature of the second side surface of the first plastic lens, R21 is the radius of curvature of the first side surface of the second plastic lens, and R22 is the radius of curvature of the second side surface of the second plastic lens.

[0017] In one embodiment, a curvature radius R11 of the first side surface of the first plastic lens and a curvature radius R12 of the second side surface of the first plastic lens may satisfy: -5≤R11 / R12≤10.

[0018] In one embodiment, the curvature radius R11 of the first side surface of the first plastic lens and the maximum effective diameter D11 of the first side surface of the first plastic lens may satisfy: R11 / D11≤2.

[0019] In one embodiment, the optical lens may satisfy the condition R21 / d2≤75 or -15≤R22 / d2≤30, wherein R21 is the radius of curvature of the first side surface of the second plastic lens, d2 is the center thickness of the second plastic lens on the optical axis, and R22 is the radius of curvature of the second side surface of the second plastic lens.

[0020] In one embodiment, the vector height SAG21 of the first side of the second plastic lens, the maximum effective aperture D21 of the first side of the second plastic lens, the vector height SAG22 of the second side of the second plastic lens, and the maximum effective aperture D22 of the second side of the second plastic lens may satisfy: -5≤(SAG21 / D21) / (SAG22 / D22)≤15.

[0021] In one embodiment, the total focal length F of the optical lens and the radius of curvature R21 of the first side surface of the second plastic lens and the radius of curvature R22 of the second side surface of the second plastic lens may satisfy: |F / R21|+|F / R22|≤7.

[0022] In one embodiment, the optical lens satisfies at least one of the following conditions: |F1 / F|≥0.8; 1.5≤|F2 / F|≤200; wherein F1 is the effective focal length of the first plastic lens, F is the total focal length of the optical lens, and F2 is the effective focal length of the second plastic lens.

[0023] In one embodiment, when the number of lenses with optical power in the optical lens is greater than four, the optical lens satisfies at least one of the following conditions: |F1 / F|≥8; 4≤|F2 / F|≤200. When the number of lenses with optical power in the optical lens is less than or equal to four, the optical lens satisfies at least one of the following conditions: 1≤|F1 / F|≤4; 2≤|F2 / F|≤20.

[0024] In one embodiment, the Abbe number Vd1 of the first plastic lens and the Abbe number Vd2 of the second plastic lens may satisfy: Vd1 / Vd2 ≤3.

[0025] In one embodiment, the air interval d12 between the first plastic lens and the second plastic lens on the optical axis, the center thickness d1 of the first plastic lens on the optical axis, and the center thickness d2 of the second plastic lens on the optical axis may satisfy: 0.5≤d12 / (d1+d2)≤5.

[0026] In one embodiment, the center thickness d2 of the second plastic lens on the optical axis, the sag SAG22 of the second side surface of the second plastic lens, and the sag SAG21 of the first side surface of the second plastic lens may satisfy: 0.85≤d2 / (d2+SAG22-SAG21)≤2.

[0027] On the other hand, the present application provides an electronic device, which includes an optical lens provided by the present application and an imaging element for converting an optical image or optical information formed by the optical lens into an electrical signal, wherein the imaging element is located on the second side of the optical lens, and light from the first side forms an image on the second side after passing through the optical lens. Alternatively, the electronic device includes an optical lens and a light source provided by the present application, wherein the light source is located on the second side of the optical lens, and light emitted by the light source is projected onto the first side of the optical lens after passing through the optical lens, forming an image or illuminating an area on the first side.

[0028] The optical lens according to the exemplary embodiment of the present application includes at least three lenses with optical power arranged along an optical axis, two of which are plastic lenses and the remaining lenses are glass lenses; the two plastic lenses are arranged in the order from the first side to the second side along the optical axis, namely, a first plastic lens arranged first and a second plastic lens arranged later; the optical power of the first plastic lens and the second plastic lens 1 and 2 and the total focal length of the optical lens Satisfy 0.001≤| 1 / |+| 2 / |≤2.5; the focus of the first plastic lens and the second plastic lens shifts with temperature σ1 and σ2 and the optical power of the first plastic lens and the second plastic lens 1 and 2 satisfies -25≤σ1× 1+σ2× 2≤30. Through this setting of the lens, the focal length of the two plastic lenses and the total focal length of the optical lens are reasonably controlled to meet the above conditional formula 0.001≤| 1 / |+| 2 / |≤2.5, which can ensure the control of light by the plastic lens, reduce the plastic lens's ability to deflect light, improve the thermal stability of the system, and effectively correct the astigmatism of the lens and improve the lens's resolution. When the lens is in a high or low temperature working environment, the focal length of the plastic lens will change with the change of temperature, and the optical power will also change accordingly. By controlling the focus offset σ1 and σ2 of the two plastic lenses with the temperature and the optical power of the two plastic lenses 1 and 2 satisfies -25≤σ1× 1+σ2× 2≤30, when the focus of the first plastic lens shifts significantly due to temperature changes, the second plastic lens can shift in the opposite direction, so that the two plastic lenses compensate each other and ensure the overall thermal stability of the system.

[0029] According to the exemplary embodiment of the present application, the optical lens adopts a lens structure including two plastic lenses, and through the reasonable control of parameters such as the focus offset with temperature, optical focal length, refractive index temperature coefficient, thermal expansion coefficient, etc. of the two plastic lenses, as well as the optimization design of parameters such as the lens curvature radius, vector height, maximum effective aperture, etc., combined with the design of the overall structure of the lens, temperature compensation between the two plastic lenses can be achieved, so that the lens has the advantages of high clarity, small distortion, high temperature resistance, small aberration, wide visual range, etc., and can also effectively reduce production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Other features, purposes and advantages of the present application will become more apparent through the following detailed description of the embodiments in conjunction with the accompanying drawings. In the accompanying drawings:

[0031] Figures 1 to 26 They are schematic diagrams showing the structures of optical lenses according to Embodiments 1 to 26 of the present application respectively;

[0032] Figure 27 to Figure 52 MTF (Modulation Transfer Function) graphs of the optical lenses according to Examples 1 to 26 of the present application at temperatures of 15° C., 30° C., 50° C., 70° C. and 90° C. are respectively shown. DETAILED DESCRIPTION

[0033] In order to facilitate the understanding of the present application, the present application will be described more comprehensively below with reference to the relevant drawings. It should be understood that these detailed descriptions are only descriptions of exemplary embodiments of the present application, and do not limit the scope of the present application in any way. Throughout the specification, the same figure numbers refer to the same elements. The expression "and / or" includes any and all combinations of one or more of the associated listed items.

[0034] It should be noted that in this specification, the expressions of first, second, third, etc. are only used to distinguish one feature from another feature, and do not represent any limitation on the features. Therefore, without departing from the teaching of the present application, the first lens discussed below may also be referred to as the second lens or the third lens.

[0035] In the drawings, the thickness, size and shape of the lenses have been slightly exaggerated for ease of explanation. Specifically, the shapes of the spherical or aspherical surfaces shown in the drawings are shown by way of example. That is, the shapes of the spherical or aspherical surfaces are not limited to the shapes of the spherical or aspherical surfaces shown in the drawings. The drawings are only examples and are not drawn strictly to scale.

[0036] In this article, the paraxial region refers to the region near the optical axis. If the lens surface is convex and the convex position is not defined, it means that the lens surface is convex at least in the paraxial region; if the lens surface is concave and the concave position is not defined, it means that the lens surface is concave at least in the paraxial region. The judgment of the surface type in the paraxial region can be judged according to the general method in the art, for example, the positive and negative R value (R refers to the radius of curvature of the paraxial region) is used to judge the concave and convex. Exemplarily, when the optical lens provided by the present application is used for photography, the surface of each lens closest to the object is called the object side of the lens, and the surface of each lens closest to the imaging surface is called the image side of the lens. In terms of the object side, when the R value is positive, it is judged as a convex surface, and when the R value is negative, it is judged as a concave surface; in terms of the image side, when the R value is positive, it is judged as a concave surface, and when the R value is negative, it is judged as a convex surface.

[0037] It should be understood that the optical lens provided in the present application can be used for both video recording and projection, and can also be used for laser radar lenses. When the optical lens provided in the present application is used for a video lens or a laser radar receiving end lens, the video lens can be, for example, a vehicle-mounted camera, an infrared camera, a drone camera, a night vision camera, a security monitoring camera, etc., and the "first side" involved in this article can refer to the object side, and the "second side" can refer to the image side. The light from the object side can be imaged on the image side; when the optical lens provided in the present application is used for a projection lens or a radar transmitting end lens, the "first side" involved in this article can refer to the object side, and the "second side" can refer to the light source side. The second side of the optical lens can be provided with a light source, and the light source can provide light with or without image information. The light from the light source side passes through the optical lens and is projected to the first side, and forms an image or illuminates the area on the first side.

[0038] It should also be understood that the terms "comprises", "including", "having", "includes" and / or "comprising", when used in this specification, indicate the presence of the stated features, elements and / or components, but do not exclude the presence or addition of one or more other features, elements, components and / or combinations thereof. In addition, when expressions such as "at least one of..." appear after a list of listed features, they modify the entire listed features rather than modifying the individual elements in the list. In addition, when describing embodiments of the present application, "may" is used to mean "one or more embodiments of the present application". And, the term "exemplary" is intended to refer to an example or illustration.

[0039] Unless otherwise defined, all terms (including technical terms and scientific terms) used in this article have the same meaning as commonly understood by ordinary technicians in the field to which this application belongs. It should also be understood that terms (such as terms defined in commonly used dictionaries) should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology, and will not be interpreted in an idealized or overly formal sense unless explicitly defined in this article.

[0040] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0041] The features, principles and other aspects of the present application are described in detail below.

[0042] In an exemplary embodiment, the optical lens comprises at least three lenses having optical power, wherein two lenses may be plastic lenses, and the remaining one or more lenses may be glass lenses. The three or more lenses included in the optical lens may be arranged in sequence from the first side to the second side along the optical axis.

[0043] In an exemplary embodiment, the two plastic lenses included in the optical lens can be respectively the first plastic lens and the second plastic lens according to the order or position of their arrangement from the first side to the second side along the optical axis, wherein, in the direction from the first side to the second side along the optical axis, the plastic lens arranged first, that is, closer to the first side, is the first plastic lens, and the plastic lens arranged later, that is, closer to the second side, is the second plastic lens. Exemplarily, for an optical lens such as a three-piece lens structure, the first lens arranged in sequence from the first side to the second side along the optical axis is, for example, a glass lens; the second lens arranged in sequence is, for example, a plastic lens, and the second lens is referred to as the first plastic lens herein; the third lens arranged in sequence is, for example, also a plastic lens, and the third lens is referred to as the second plastic lens herein. For example, for an optical lens having a seven-lens structure, the first lens arranged in sequence from the first side to the second side along the optical axis is, for example, a glass lens; the second lens arranged in sequence is, for example, a plastic lens, and the second lens is referred to as the first plastic lens herein; the third lens to the sixth lens arranged in sequence are, for example, all glass lenses; the seventh lens arranged in sequence is, for example, a plastic lens, and the seventh lens is referred to as the second plastic lens herein.

[0044] In an exemplary embodiment, the first plastic lens may be, for example, the second lens of a plurality of lenses sequentially arranged from a first side to a second side along an optical axis in an optical lens.

[0045] In an exemplary embodiment, the first plastic lens may be, for example, the first lens of a plurality of lenses sequentially arranged from a first side to a second side along an optical axis in an optical lens.

[0046] In an exemplary embodiment, the second plastic lens may be, for example, the last lens of a plurality of lenses sequentially arranged from the first side to the second side along the optical axis in the optical lens.

[0047] Reasonably setting a certain number of plastic lenses in the optical lens, for example, setting two plastic lenses, can not only make the lens better shaped during processing, reduce the weight of the lens, and be beneficial to lightweight, but also reduce costs. At the same time, through the reasonable selection of the materials of the two plastic lenses and the optimization design of their shapes and sizes, the material's properties such as focus offset with temperature, optical focal length, refractive index temperature coefficient, thermal expansion coefficient and Abbe number are within the preferred range, and the two plastic lenses are reasonably matched, and the parameters of their shape and size such as curvature radius, sagittal height, maximum effective aperture and center thickness are optimized, and with the reasonable setting of the overall structure of the lens, temperature compensation between the two plastic lenses can be achieved, the thermal stability of the system can be improved, and it can be beneficial to achieve the advantages of the lens with high clarity, small distortion, high temperature resistance, small aberration, wide visual range, etc.

[0048] In an exemplary embodiment, the first side may be, for example, the object side, and the second side may be, for example, the image side. Accordingly, the first side of each optical element in the optical lens may be the object side of each optical element, and the second side of each optical element may be the image side of each optical element.

[0049] In this article, the center thickness of the lens (on the optical axis) can be understood as the distance from the center of the first side of the lens to the center of the second side of the lens on the optical axis. Taking the second plastic lens as an example, the center thickness d2 of the second plastic lens can be understood as the distance from the center of the first side of the second plastic lens to the center of the second side of the second plastic lens on the optical axis. In this article, the vector height of the first side or the second side of the lens can be understood as the distance from the intersection of the side of the lens and the optical axis to the vertex of the effective radius of the side of the lens on the optical axis. Taking the vector height SAG12 of the second side of the first plastic lens as an example, it can be understood as the distance from the intersection of the second side of the first plastic lens and the optical axis to the vertex of the effective radius of the second side of the first plastic lens on the optical axis. In this article, the maximum effective aperture of the first side or the second side of the lens can be understood as the maximum effective aperture of the first side or the second side of the lens corresponding to the maximum field of view of the optical lens. Taking the maximum effective aperture D21 of the first side of the second plastic lens as an example, it can be understood as the maximum effective aperture of the first side of the second plastic lens corresponding to the maximum field of view of the optical lens. In addition, the air gap d12 between the first plastic lens and the second plastic lens on the optical axis herein can be understood as the distance from the second side surface of the first plastic lens to the first side surface of the second plastic lens on the optical axis.

[0050] It should be noted that for plastic lenses, the focal length of the lens will also change to a certain extent with changes in temperature. In this article, the focus offset with temperature is defined as σ. Specifically, when the ambient temperature of the plastic lens changes, the focal length of the lens will be offset accordingly due to the thermal expansion and contraction of the lens material and the change in refractive index with temperature. This offset can be measured by σ. The ratio of the temperature refractive index coefficient to the lens refractive index minus the air refractive index, minus the thermal expansion coefficient, is the focus offset with temperature σ, which can be calculated by the following formula:

[0051] σ = (dn / dt) / (nd-1)-CTE,

[0052] Wherein, dn / dt is the refractive index temperature coefficient of the plastic lens, nd is the refractive index of the plastic lens, and CTE is the thermal expansion coefficient of the plastic lens. In addition, in different temperature ranges, the value of the focal length change rate σ with temperature may be different. For example, in Example 1 of the present application, when the first plastic lens is in the temperature range of 0 to 20°, the focal length change rate σ with temperature is -244.3758, and when it is in the temperature range of 80 to 100°, the focal length change rate with temperature is -293.1683. In order to ensure the thermal stability of the optical system, the σ value of the plastic lens must be limited to a reasonable range. Specifically, for the present application, the σ value of the two plastic lenses can be limited to the range of -400 to -150, that is, the focus offset σ1 of the first plastic lens with temperature can satisfy: -400≤σ1≤-150, and the focus offset σ2 of the second plastic lens with temperature can satisfy: -400≤σ2≤-150. By limiting σ1 and σ2 within this range, the overall thermal stability and high imaging quality of the optical system can be guaranteed. When the σ1 and σ2 values ​​are less than this range, the plastic lens has no compensation effect on temperature, and when the σ1 and σ2 values ​​are greater than this range, the lens will be too sensitive, resulting in large fluctuation errors, and thus poor imaging quality.

[0053] In an exemplary embodiment, the focus offset with temperature σ1 of the first plastic lens and the focus offset with temperature σ2 of the second plastic lens can respectively satisfy: -400≤σ1≤-150 and -400≤σ2≤-150. By reasonably constraining the focus offset with temperature of the two plastic lenses in the lens, the temperature characteristics of the two plastic lenses can be guaranteed, so that the two plastic lenses can still have stable and good performance under the influence of the thermal expansion coefficient and refractive index of the material and the thermal expansion and contraction of the lens material caused by the change of ambient temperature; the focus offset with temperature of the plastic lens is controlled not to be too small to ensure that the plastic lens can achieve the function of adjusting thermal compensation, and at the same time, the focus offset with temperature of the plastic lens is controlled not to be too large to ensure that the lens in high and low temperature conditions will not be too sensitive to avoid large fluctuation errors, thereby ensuring the stability of the lens resolution at different temperatures. More specifically, σ1 and σ2 can further satisfy: -350≤σ1≤-200 and -350≤σ2≤-200. By controlling the focus offset of the two plastic lenses with temperature within this range, it can be more conducive to ensuring the temperature characteristics of the two plastic lenses and further ensuring the stability of the lens resolution at different temperatures.

[0054] In an exemplary embodiment, the optical lens according to the present application may satisfy the conditional formula: 0.001≤| 1 / |+| 2 / |≤2.5, where 1 is the focal length of the first plastic lens, 2 is the focal length of the second plastic lens, is the total optical power of the optical lens. By reasonably limiting the optical power of the two plastic lenses and the total optical power of the optical lens to meet the above conditional formula 0.001≤| 1 / |+| 2 / |≤2.5, which can ensure the control of light by the plastic lens, reduce the plastic lens's ability to deflect light, improve the thermal stability of the system, and effectively correct the astigmatism of the lens and improve the lens's resolution. More specifically, when the number of lenses with optical power in the optical lens is greater than four, the above conditional expression can further satisfy: 0.001≤| 1 / |+| 2 / |≤0.3, when the number of lenses is greater than four, the focal length of the two plastic lenses can be appropriately controlled to be set smaller, which is more conducive to weakening the plastic lens's ability to deflect light, better improving the system's thermal stability, and more effectively correcting the lens's astigmatism, further improving the lens's resolution. When the number of lenses with focal length in the optical lens is four or less, the above conditional expression can further satisfy: 0.25≤| 1 / |+| 2 / |≤2, when the number of lenses is four or less than four, the optical focal length of the two plastic lenses can be appropriately set to be larger, which is beneficial to enhancing the plastic lens's ability to control light and to better improve the thermal stability of the system.

[0055] In an exemplary embodiment, the optical lens according to the present application may satisfy the conditional formula: -25≤σ1× 1+σ2× 2≤30, where σ1 is the focus offset of the first plastic lens with temperature, σ2 is the focus offset of the second plastic lens with temperature, 1 is the focal length of the first plastic lens, 2 is the focal length of the second plastic lens. When the lens is in a high or low temperature working environment, the focal length of the plastic lens will change with the change of temperature, and the focal length will also change accordingly. By controlling the two plastic lenses to satisfy -25≤σ1× 1+σ2× 2≤30, when the focus of the first plastic lens shifts significantly with temperature change, the above limitation is met, and the second plastic lens can shift in the opposite direction, so that the two plastic lenses compensate each other and ensure the overall thermal stability of the system.

[0056] In an exemplary embodiment, the optical lens according to the present application may satisfy the conditional formula: -250≤σ1 / F+σ2 / F≤-50, wherein σ1 is the focus offset of the first plastic lens with temperature, σ2 is the focus offset of the second plastic lens with temperature, and F is the total focal length of the optical lens. By reasonably constraining the relationship between the focus offset of the two plastic lenses with temperature and the total focal length of the optical lens so that it satisfies the limitation of the above conditional formula, it can help the lens to obtain good resolution at both high and low temperatures and improve the thermal stability of the system. More specifically, σ1, σ2 and F can further satisfy: -240≤σ1 / F+σ2 / F≤-60. By controlling the conditional formula within this numerical range, it can be more conducive to the lens to obtain good resolution at both high and low temperatures, and the thermal stability of the system can be further improved.

[0057] In an exemplary embodiment, at least one of the first plastic lens and the second plastic lens may have positive optical power. By properly matching the optical power of the two plastic lenses and selecting the materials of the two plastic lenses, it is possible to reduce the sensitivity of the optical lens, correct the aberration of the optical lens, and improve the imaging quality of the lens.

[0058] In an exemplary embodiment, the optical lens may include one or more aspherical lenses. Aspherical mirror surfaces have different curvatures at different positions, which can adjust the light trend to converge to the image plane, have better curvature radius characteristics, can effectively correct aberrations and field curvatures, and improve the resolution of the optical system; can improve distortion aberrations and improve astigmatism aberrations, eliminate aberrations that occur during imaging as much as possible, and improve the imaging quality of the lens. The present application does not specifically limit the number of spherical lenses and aspherical lenses. When focusing on the resolution quality, the number of aspherical lenses can be increased. In particular, in order to improve the resolution quality of the optical system, each lens in the optical lens may be an aspherical lens.

[0059] In an exemplary embodiment, the second plastic lens may be an aspherical lens. Setting the second plastic lens to be an aspherical lens can achieve the effect of reducing aberrations, improve the resolution of the lens, and ensure the performance of the lens and the resolution requirements in high and low temperature environments. In some exemplary embodiments, the second plastic lens may be the last lens arranged from the first side to the second side of the optical lens, ensuring that the distance from the last lens to the image plane is within a reasonable range, so that the ability of the aspherical surface to correct aberrations can be fully utilized, and the distance is appropriately increased to meet the special requirements of the back focal length of the optical lens, and space can also be reserved for the installation and focusing of optical elements to avoid mechanical interference.

[0060] In an exemplary embodiment, one or more lenses in the optical lens may have an inflection point. The inflection is beneficial to balance the aberration of the central field of view and the peripheral field of view, and improve the resolution.

[0061] In an exemplary embodiment, the optical lens according to the present application may satisfy at least one of the following two conditional expressions: 0≤|σ1× 1|≤100, 0≤|σ2× 2|≤100; where σ1 is the focus offset of the first plastic lens with temperature, 1 is the focal length of the first plastic lens, σ2 is the focus offset of the second plastic lens with temperature, 2 is the focal length of the second plastic lens. By controlling the lens to satisfy at least one of the two conditional expressions, and reasonably setting the surface shape and material of the first plastic lens and / or the second plastic lens, it is helpful to reduce the sensitivity of the optical lens, so that the back focus drift of the lens in high and low temperature environments is controlled within a very small range, and it is also helpful to correct the aberration of the optical lens and improve the imaging quality. More specifically, the optical lens can further satisfy at least one of the following two conditional expressions: 0≤|σ1× 1|≤90,0≤|σ2× 2|≤60. By controlling the lens to satisfy at least one of the two conditional expressions to further limit the range, it can be more conducive to reducing the sensitivity of the optical lens, further ensuring that the back focus drift of the lens in high and low temperature environments is controlled within a very small range, and at the same time, it is more conducive to correcting the aberration of the optical lens and further improving the imaging quality.

[0062] In an exemplary embodiment, the optical lens according to the present application may satisfy at least one of the following two conditional expressions: -20≤F1 / (dn / dt1), -20≤F2 / (dn / dt2)≤50; wherein F1 is the effective focal length of the first plastic lens, dn / dt1 is the refractive index temperature coefficient of the first plastic lens, F2 is the effective focal length of the second plastic lens, and dn / dt2 is the refractive index temperature coefficient of the second plastic lens. By controlling the lens to satisfy at least one of the two conditional expressions, the surface shape and material selection of the first plastic lens and / or the second plastic lens are reasonably set, which is conducive to reducing the sensitivity of the optical lens, and at the same time, it is conducive to correcting the aberration of the optical lens and improving the imaging quality. More specifically, the optical lens may further satisfy at least one of the following two conditional expressions: -10≤F1 / (dn / dt1)≤15000, -10≤F2 / (dn / dt2)≤15. By controlling the lens to satisfy at least one of the two conditional expressions to further limit the range, it can be more beneficial to reduce the sensitivity of the optical lens, and further help correct the aberration of the optical lens, thereby further improving the imaging quality of the lens.

[0063] In an exemplary embodiment, the optical lens according to the present application can satisfy the conditional formula: 0≤|dn / dt2-dn / dt1|≤50, where dn / dt2 is the refractive index temperature coefficient of the second plastic lens, and dn / dt1 is the refractive index temperature coefficient of the first plastic lens. By controlling the refractive index temperature coefficients of the two plastic lenses to satisfy this conditional formula, the optimal focal plane of the lens can be controlled to change less when the high and low temperatures change, the sensitivity of thermal compensation can be reduced, the generation of fluctuations can be controlled, and the entire system can be less affected by temperature by matching the other glass lenses in the lens, thereby ensuring the overall thermal stability of the system. More specifically, dn / dt2 and dn / dt1 can further satisfy: 0≤|dn / dt2-dn / dt1|≤30. By controlling the refractive index temperature coefficient of the two plastic lenses to satisfy the further limited numerical range, it can be more conducive to controlling the lens to have a smaller change in the optimal focal plane when the high and low temperatures change, further reducing the thermal compensation sensitivity, and better controlling the generation of fluctuations. In combination with the other glass lenses in the lens, the temperature influence on the entire system can be further reduced, and the overall thermal stability of the system can be better guaranteed.

[0064] In an exemplary embodiment, the optical lens according to the present application may satisfy the conditional formula: 0≤| 1×(dn / dt1)+ 2×(dn / dt2)|≤20, where 1 is the focal length of the first plastic lens, dn / dt1 is the refractive index temperature coefficient of the first plastic lens, 2 is the optical power of the second plastic lens, and dn / dt2 is the refractive index temperature coefficient of the second plastic lens. By controlling the lens to meet this conditional formula, while the optical power of the two plastic lenses is reasonably distributed, the refractive index temperature coefficient of the corresponding plastic lenses is also reasonably limited, so that the two plastic lenses can compensate each other in high and low temperature environments. When the focus of the first plastic lens shifts under the influence of temperature, the second plastic lens can shift in the opposite direction, and the two can offset each other, so that the overall offset of the system is not too large, ensuring the thermal stability of the system. More specifically, 1. dn / dt1, 2 and dn / dt2 can further satisfy: 0≤| 1×(dn / dt1)+ 2×(dn / dt2)|≤15. By controlling the two plastic lenses of the lens to meet the further limited numerical range, the two plastic lenses can better compensate each other in high and low temperature environments, which can further improve the thermal stability of the lens. At the same time, it can be more conducive to ensuring that the focus offset of the lens is very small in high and low temperature working environments, so that the lens always has good imaging quality.

[0065] In an exemplary embodiment, the optical lens according to the present application can satisfy the conditional formula: 0≤|(dn / dt1+dn / dt2) / (F1+F2)|≤200, wherein dn / dt1 is the refractive index temperature coefficient of the first plastic lens, dn / dt2 is the refractive index temperature coefficient of the second plastic lens, F1 is the effective focal length of the first plastic lens, and F2 is the effective focal length of the second plastic lens. By controlling the lens to satisfy the conditional formula and reasonably optimizing the positive and negative focal lengths of the two plastic lenses, the lens aberration can be effectively corrected, while overcoming the defect that the plastic lens is prone to focus drift in high and low temperature environments due to its large expansion coefficient. More specifically, dn / dt1, dn / dt2, F1 and F2 can further satisfy: 0≤|(dn / dt1+dn / dt2) / (F1+F2)|≤110. By controlling the two plastic lenses of the lens to satisfy the further limited numerical range, it can be more beneficial to reduce the sensitivity of the optical lens, and at the same time further help correct the aberration of the optical lens, thereby further improving the imaging quality of the lens.

[0066] In an exemplary embodiment, the optical lens according to the present application may satisfy at least one of the following two conditional expressions: 0.0001≤|dn / dt1×CTE1×F1(10 -6 mm / ℃ 2 )|,0≤|dn / dt2×CTE2×F2(10 -6 mm / ℃ 2 )|≤90; wherein, dn / dt1 is the temperature coefficient of the refractive index of the first plastic lens, CTE1 is the coefficient of thermal expansion of the first plastic lens, F1 is the effective focal length of the first plastic lens, dn / dt2 is the temperature coefficient of the refractive index of the second plastic lens, CTE2 is the coefficient of thermal expansion of the second plastic lens, and F2 is the effective focal length of the second plastic lens. By controlling the lens to meet at least one of these two conditional expressions, the rate of change of the refractive index of the first plastic lens and / or the second plastic lens with temperature is reasonably limited, and reasonable matching is performed according to the different thermal expansion characteristics of the lens materials, which is conducive to achieving the stability of the focal length of the entire system. More specifically, the optical lens can further meet at least one of the following two conditional expressions: 0.0001≤|dn / dt1×CTE1×F1(10 -6 mm / ℃ 2 )|≤99999,0≤|dn / dt2×CTE2×F2(10 -6 mm / ℃ 2 )|≤75, by controlling the lens to satisfy at least one of the two conditional expressions to further limit the range, it can be more conducive to achieving the stability of the focal length of the entire system.

[0067] In an exemplary embodiment, the optical lens according to the present application may satisfy the conditional formula: -0.0075≤dn / dt1×CTE1× 1+dn / dt2×CTE2× 2≤0.0075, wherein dn / dt1 is the refractive index temperature coefficient of the first plastic lens, CTE1 is the thermal expansion coefficient of the first plastic lens, 1 is the optical power of the first plastic lens, dn / dt2 is the refractive index temperature coefficient of the second plastic lens, CTE2 is the thermal expansion coefficient of the second plastic lens, 2 is the focal length of the second plastic lens. When the lens is in a high or low temperature working environment, the refractive index and thermal expansion coefficient of the plastic lens change, and the focal length also changes accordingly. The two plastic lenses are controlled to meet the conditional formula -0.0075≤dn / dt1×CTE1× 1+dn / dt2×CTE2× 2≤0.0075, when the focus of the first plastic lens shifts significantly with temperature changes, the above limitation is met, and the second plastic lens can shift in the opposite direction, so that the two plastic lenses compensate each other and ensure the overall thermal stability of the system.

[0068] In an exemplary embodiment, the refractive index temperature coefficient dn / dt1 of the first plastic lens may satisfy: -125≤dn / dt1≤-85. The material of the first plastic lens is reasonably selected so that it has a refractive index temperature coefficient that satisfies this condition. Since the rate of change of the refractive index of the plastic lens with temperature is reasonably distributed, the effect of thermal expansion caused by the lens itself and structural parts on the focal length can be offset, thereby achieving focal length stability and suitability for different temperature occasions; thereby helping the lens to maintain good resolution at high and low temperatures and good temperature performance.

[0069] In an exemplary embodiment, the refractive index temperature coefficient dn / dt2 of the second plastic lens can satisfy: -125≤dn / dt2≤-85. The material of the second plastic lens is reasonably selected so that it has a refractive index temperature coefficient that satisfies this condition. Since the rate of change of the refractive index of the plastic lens with temperature is reasonably distributed, the effect of thermal expansion caused by the lens itself and structural parts on the focal length can be offset, thereby achieving focal length stability and suitability for different temperature occasions; thereby helping the lens to maintain good resolution at high and low temperatures and good temperature performance.

[0070] In an exemplary embodiment, the optical lens according to the present application can satisfy the conditional formula: 70≤|SAG12×σ1+SAG22×σ2|≤600, wherein SAG12 is the sagittal height of the second side of the first plastic lens, σ1 is the focus offset of the first plastic lens with temperature, SAG22 is the sagittal height of the second side of the second plastic lens, and σ2 is the focus offset of the second plastic lens with temperature. By controlling the lens to satisfy this conditional formula and rationally designing the sagittal height of the second side of the two plastic lenses to cooperate with their focus offset with temperature, the focus of the entire system can be prevented from deviating too much and controlled within a reasonable range, thereby ensuring the thermal stability of the system and preventing the entire optical system from being affected by temperature changes. More specifically, the above conditional formula can further satisfy: 95≤|SAG12×σ1+SAG22×σ2|≤550. By controlling the two plastic lenses of the lens to satisfy this further limited numerical range, it can be more conducive to ensuring the thermal stability of the system.

[0071] In an exemplary embodiment, the optical lens according to the present application may satisfy the conditional formula: 100≤CTE1× +CTE2× ≤650, where CTE1 is the thermal expansion coefficient of the first plastic lens, CTE2 is the thermal expansion coefficient of the second plastic lens, is the total optical power of the optical lens. By reasonably controlling the thermal expansion coefficient of the two plastic lenses and the overall optical power to meet this conditional expression, and controlling the overall optical power within a smaller range, the deformation of the two plastic lenses under temperature changes can be effectively controlled, thereby ensuring that the overall optical system has good thermal stability. More specifically, the above conditional expression can further satisfy: 150≤CTE1× +CTE2× ≤500. By controlling the two plastic lenses of the lens to meet the further limited numerical range, it is more conducive to controlling the deformation of the two plastic lenses under temperature changes, and is more conducive to ensuring that the overall optical system has good thermal stability.

[0072] In an exemplary embodiment, the optical lens according to the present application may satisfy at least one of the following two conditional expressions: -1.5≤(R11-R12) / (R11+R12)≤8, -5≤(R21-R22) / (R21+R22)≤5; wherein R11 is the radius of curvature of the first side surface of the first plastic lens, R12 is the radius of curvature of the second side surface of the first plastic lens, R21 is the radius of curvature of the first side surface of the second plastic lens, and R22 is the radius of curvature of the second side surface of the second plastic lens. By controlling the lens to satisfy at least one of the two conditional expressions, and reasonably controlling the curvature radius values ​​of the first side surface and the second side surface of the first plastic lens to satisfy the conditional expression of -1.5≤(R11-R12) / (R11+R12)≤8, the first plastic lens can effectively correct the aberration of the optical system, and can ensure that the light can be incident on the rear optical system more smoothly after passing through the first plastic lens, which is beneficial to reducing the tolerance sensitivity of the optical system; reasonably controlling the curvature radius values ​​of the first side surface and the second side surface of the second plastic lens to satisfy the conditional expression of -5≤(R21-R22) / (R21+R22)≤5, the second plastic lens can effectively correct the aberration of the optical system, and can ensure that the light can be incident on the rear optical system more smoothly after passing through the second plastic lens, which is beneficial to reducing the tolerance sensitivity of the optical system. More specifically, the optical lens may further satisfy at least one of the following two conditional expressions: -1≤(R11-R12) / (R11+R12)≤5, -2≤(R21-R22) / (R21+R22)≤3. By controlling the lens to satisfy at least one of the two conditional expressions to further limit the range, it can be more beneficial for the first and / or second plastic lens to correct the aberrations of the optical system, better ensure that the light is smoothly incident on the rear optical system after passing through the first and / or second plastic lens, and further help to reduce the tolerance sensitivity of the optical system.

[0073] In an exemplary embodiment, the optical lens according to the present application may satisfy the conditional formula: -5≤R11 / R12≤10, wherein R11 is the radius of curvature of the first side of the first plastic lens, and R12 is the radius of curvature of the second side of the first plastic lens. By controlling the ratio of the radius of curvature of the first side of the first plastic lens to the radius of curvature of the second side of the first plastic lens within this range, the lens shape of the first plastic lens can be reasonably set, which is conducive to the smooth transition of the light trend. More specifically, R11 and R12 can further satisfy: -3.5≤R11 / R12≤5.5. By controlling the ratio of the radius of curvature of the first side of the first plastic lens to the radius of curvature of the second side of the first plastic lens to satisfy this further defined range, the lens shape of the first plastic lens can be set more reasonably, which is further conducive to the smooth transition of the light trend.

[0074] In an exemplary embodiment, the optical lens according to the present application may satisfy the conditional formula: R11 / D11≤2, wherein R11 is the radius of curvature of the first side of the first plastic lens, and D11 is the maximum effective aperture of the first side of the first plastic lens. By controlling the ratio of the radius of curvature of the first side of the first plastic lens to the maximum effective aperture within this range, the R11 value is reasonably controlled to be small, which is conducive to reducing the height of the light incident on the rear system and is conducive to achieving a small aperture. At the same time, the R11 value is controlled not to be too small to take into account the processability of the lens.

[0075] In an exemplary embodiment, the optical lens according to the present application may satisfy the conditional formula: R21 / d2≤75, wherein R21 is the radius of curvature of the first side of the second plastic lens, and d2 is the center thickness of the second plastic lens on the optical axis. By controlling the ratio of the radius of curvature of the first side of the second plastic lens to the center thickness of the second plastic lens on the optical axis within this range, it is advantageous to achieve a small aperture at the rear end of the system and to reduce the overall size of the lens. More specifically, R21 and d2 may further satisfy: 1.5≤R21 / d2≤70, and by controlling the ratio of R21 to d2 to further satisfy this range, it is advantageous to further achieve a small aperture at the rear end of the system and to reduce the overall size of the lens.

[0076] In an exemplary embodiment, the optical lens according to the present application may satisfy the conditional formula: -15≤R22 / d2≤30, wherein R22 is the radius of curvature of the second side of the second plastic lens, and d2 is the center thickness of the second plastic lens on the optical axis. By controlling the ratio of the radius of curvature of the second side of the second plastic lens to the center thickness of the second plastic lens on the optical axis within this range, it is advantageous to achieve a small aperture at the rear end of the system and to reduce the overall size of the lens. More specifically, R22 and d2 may further satisfy: -10≤R22 / d2≤20, and by controlling the ratio of R22 to d2 to further satisfy this range, it is advantageous to further achieve a small aperture at the rear end of the system and to reduce the overall size of the lens.

[0077] In an exemplary embodiment, the optical lens according to the present application may satisfy the conditional formula: -5≤(SAG21 / D21) / (SAG22 / D22)≤15, wherein SAG21 is the sag of the first side of the second plastic lens, D21 is the maximum effective aperture of the first side of the second plastic lens, SAG22 is the sag of the second side of the second plastic lens, and D22 is the maximum effective aperture of the second side of the second plastic lens. By controlling the optical lens to satisfy the conditional formula, the shapes of the first side and the second side of the second plastic lens are reasonably set to be close, and the peripheral light is smoothly transitioned, which is beneficial to reducing the sensitivity of the lens. More specifically, the above conditional formula may further satisfy: -2.5≤(SAG21 / D21) / (SAG22 / D22)≤7. By further controlling the conditional formula within this range, it can be more conducive to a smooth transition of the peripheral light, which is further beneficial to reducing the sensitivity of the lens.

[0078] In an exemplary embodiment, the optical lens according to the present application may satisfy the conditional formula: |F / R21|+|F / R22|≤7, wherein F is the total focal length of the optical lens, R21 is the radius of curvature of the first side of the second plastic lens, and R22 is the radius of curvature of the second side of the second plastic lens. By controlling the optical lens to satisfy this conditional formula and rationally controlling the surface curvature of the second plastic lens, it can be beneficial for the light to smoothly exit after passing through the second plastic lens, reduce the system sensitivity, and effectively correct the field curvature aberration to improve the imaging quality, which is beneficial for the system to achieve high resolution. More specifically, the above conditional formula can further satisfy: |F / R21|+|F / R22|≤5.5. By further controlling the conditional formula within this range, it can be more beneficial to assist the incident light to enter the optical photography system lens group, further correct the astigmatism, improve the imaging quality, and be more beneficial for the system to achieve high resolution.

[0079] In an exemplary embodiment, the optical lens according to the present application may satisfy at least one of the following two conditional expressions: |F1 / F|≥0.8, 1.5≤|F2 / F|≤200; wherein F1 is the effective focal length of the first plastic lens, F is the total focal length of the optical lens, and F2 is the effective focal length of the second plastic lens. By controlling the lens to satisfy at least one of the two conditional expressions, wherein by controlling the ratio of the effective focal length of the first plastic lens to the total focal length of the optical lens to satisfy |F1 / F|≥0.8, the focal length of the first plastic lens is reasonably allocated to have a larger range, which helps to reduce the light deflection change of the optical lens at high and low temperatures, has good temperature performance, and helps to achieve thermal compensation; by controlling the ratio of the effective focal length of the second plastic lens to the total focal length of the optical lens to satisfy 1.5≤|F2 / F|≤200, the focal length of the second plastic lens is reasonably allocated to have a larger range, which helps to reduce the light deflection change of the optical lens at high and low temperatures, has good temperature performance, and helps to achieve thermal compensation.

[0080] In an exemplary embodiment, when the number of lenses with optical power in the optical lens is greater than four, the optical lens may satisfy at least one of the following two conditional expressions: |F1 / F|≥8, 4≤|F2 / F|≤200. When the number of lenses in the optical lens is greater than four, by controlling the ratio of the effective focal length of the first plastic lens to the total focal length of the lens to satisfy the conditional expression |F1 / F|≥8, the first plastic lens has a larger focal length range, which helps to reduce the change of light deflection at high and low temperatures of the optical lens, has good temperature performance, and helps to achieve thermal compensation. When the number of lenses in the optical lens is greater than four, by controlling the ratio of the effective focal length of the second plastic lens to the total focal length of the lens to satisfy the conditional expression 4≤|F2 / F|≤200, the second plastic lens has a larger focal length range, which also helps to reduce the change of light deflection at high and low temperatures of the optical lens, has good temperature performance, and helps to achieve thermal compensation.

[0081] In an exemplary embodiment, when the number of lenses with optical power in the optical lens is four or less than four, the optical lens may satisfy at least one of the following two conditional expressions: 1≤|F1 / F|≤4, 2≤|F2 / F|≤20. When the number of lenses in the optical lens is four or less than four, due to the small number of lenses in the lens, by controlling the ratio of the effective focal length of the first plastic lens to the total focal length of the lens to satisfy the conditional expression 1≤|F1 / F|≤4, the first plastic lens can have a strong convergence or divergence effect on the light while having a thermal compensation effect, which is beneficial for the lens to achieve a better imaging effect. When the number of lenses in the optical lens is four or less than four, due to the small number of lenses in the lens, by controlling the ratio of the effective focal length of the second plastic lens to the total focal length of the lens to satisfy the conditional expression 2≤|F2 / F|≤20, the second plastic lens can also have a strong convergence or divergence effect on the light while having a thermal compensation effect, which is beneficial for the lens to achieve a better imaging effect.

[0082] In an exemplary embodiment, the optical lens according to the present application may satisfy the conditional formula: Vd1 / Vd2≤3, wherein Vd1 is the Abbe number of the first plastic lens, and Vd2 is the Abbe number of the second plastic lens. By controlling the ratio of the Abbe number of the first plastic lens to the Abbe number of the second plastic lens within this range, and properly matching the materials of the two plastic lenses, it is helpful to correct chromatic aberration and improve resolution. More specifically, Vd1 and Vd2 may further satisfy: Vd1 / Vd2≤2.5, and by further controlling the conditional formula within this range, it may be more conducive to correcting chromatic aberration and improving resolution.

[0083] In an exemplary embodiment, the optical lens according to the present application may satisfy the conditional formula: 0.5≤d12 / (d1+d2)≤5, wherein d12 is the air interval between the first plastic lens and the second plastic lens on the optical axis, d1 is the center thickness of the first plastic lens on the optical axis, and d2 is the center thickness of the second plastic lens on the optical axis. By controlling d12, d1, and d2 to satisfy the conditional formula and reasonably limiting the distance between the two plastic lenses, it is beneficial to the smooth transition of light and the improvement of image quality.

[0084] In an exemplary embodiment, the optical lens according to the present application may satisfy the conditional formula: 0.85≤d2 / (d2+SAG22-SAG21)≤2, wherein d2 is the center thickness of the second plastic lens on the optical axis, SAG22 is the sagittal height of the second side of the second plastic lens, and SAG21 is the sagittal height of the first side of the second plastic lens. By controlling this conditional formula, the ratio of the center thickness to the edge thickness of the second plastic lens is limited to a reasonable range, and the lens shape is relatively flat, which can make the light transition to the imaging surface more smoothly; the second plastic lens can be aspherical, and the field curvature aberration can also be corrected to improve the imaging quality.

[0085] In an exemplary embodiment, the optical lens of the present application may further include an imaging surface and a photosensitive element disposed on the imaging surface. Optionally, the photosensitive element disposed on the imaging surface may be a charge coupled device (CCD) or a complementary metal oxide semiconductor (CMOS).

[0086] In an exemplary embodiment, the optical lens of the present application may further include a filter and / or a protective glass disposed between the last lens closest to the image side and the imaging surface as required. The filter may filter light having a specific wavelength, and the protective glass may prevent the second side element (e.g., chip) of the optical lens from being damaged.

[0087] In an exemplary embodiment, the optical lens may further include an aperture. The aperture may constrain the light path and control the light intensity. The aperture may be set at an appropriate position of the optical lens. By properly setting the position of the aperture, it may be beneficial to effectively converge the light entering the optical system, reduce the lens aperture at the rear end of the optical system, and reduce the assembly sensitivity of the system.

[0088] The optical lens according to the exemplary embodiment of the present application includes at least three lenses with optical power arranged along an optical axis, two of which are plastic lenses and the remaining lenses are glass lenses; the two plastic lenses are arranged in the order from the first side to the second side along the optical axis, namely, a first plastic lens arranged first and a second plastic lens arranged later; the optical power of the first plastic lens and the second plastic lens 1 and 2 and the total focal length of the optical lens Satisfy 0.001≤| 1 / |+| 2 / |≤2.5; the focus of the first plastic lens and the second plastic lens shifts with temperature σ1 and σ2 and the optical power of the first plastic lens and the second plastic lens 1 and 2 satisfies -25≤σ1× 1+σ2× 2≤30. Through this setting of the lens, the focal length of the two plastic lenses and the total focal length of the optical lens are reasonably controlled to meet the above conditional formula 0.001≤| 1 / |+| 2 / |≤2.5, which can ensure the control of light by the plastic lens, reduce the plastic lens's ability to deflect light, improve the thermal stability of the system, and effectively correct the astigmatism of the lens and improve the lens's resolution. When the lens is in a high or low temperature working environment, the focal length of the plastic lens will change with the change of temperature, and the optical power will also change accordingly. By controlling the focus offset σ1 and σ2 of the two plastic lenses with the temperature and the optical power of the two plastic lenses 1 and 2 satisfies -25≤σ1× 1+σ2× 2≤30, when the focus of the first plastic lens shifts significantly due to temperature changes, the second plastic lens can shift in the opposite direction, so that the two plastic lenses compensate each other and ensure the overall thermal stability of the system.

[0089] According to the optical lens of the exemplary embodiment of the present application, the glass-plastic hybrid configuration can effectively reduce the cost. Specifically, the optical lens includes two plastic lenses. To ensure the thermal stability of the overall optical system, the focal length of the two plastic lenses can be limited when the focal length of the two plastic lenses is allocated. 1. 2 and the total focal length of the lens Satisfy 0.001≤| 1 / |+| 2 / |≤2.5, when the number of lenses with optical power in the lens is greater than four, the effective focal lengths F1 and F2 of the two plastic lenses and the total focal length F of the lens can be limited to satisfy |F1 / F|≥8 and 4≤|F2 / F|≤200 respectively. Reasonable control of the plastic lenses with a larger focal length helps to reduce the change in light deflection under high and low temperature conditions of the optical lens, has good temperature performance, helps to achieve thermal compensation, and can achieve better imaging effects with other glass lenses; when the number of lenses with optical power in the lens is four or less, due to the small number of lenses, F1, F2 and F can be limited to satisfy 1≤|F1 / F|≤4, 2≤|F2 / F|≤20 respectively, so that the plastic lenses can have a strong convergence or divergence effect on light while having a thermal compensation effect, achieving better imaging effects. When the lens is in a high and low temperature working environment, the focus of the plastic lens will change with the temperature offset and the focal length of the lens itself. Controlling the optical power of the two plastic lenses 1. 2 and the focus of the two plastic lenses shifts with temperature σ1, σ2 to meet -25≤σ1× 1+σ2× 2≤30, when the focus of the first plastic lens shifts significantly with temperature changes, the above limitation is met, and the second plastic lens can shift in the opposite direction, so that the two plastic lenses can compensate each other and ensure the overall thermal stability of the system; further, the focal length of the two plastic lenses is reasonably allocated. 1 and 2, the refractive index temperature coefficients dn / dt1 and dn / dt2 and the thermal expansion coefficients CTE1 and CTE2 of the two plastic lenses can also be reasonably limited to satisfy 0≤| 1×(dn / dt1)+ 2×(dn / dt2)|≤20,-0.0075≤dn / dt1×CTE1× 1+dn / dt2×CTE2× 2≤0.0075, further ensuring that when the focus of the first plastic lens shifts under the influence of temperature, the second plastic lens shifts in the opposite direction, and the two offset each other, so that the overall offset of the system is not too large, and the thermal stability of the system is better guaranteed.

[0090] Furthermore, according to the optical lens of the present application, when one or more of the above-mentioned conditional expressions are satisfied, the first plastic lens can be reasonably controlled to have a curvature radius of the first side and the second side satisfying -1.5≤(R11-R12) / (R11+R12)≤8, so that the first plastic lens can effectively correct the aberration of the optical system, and can ensure that the light can be incident on the rear optical system more smoothly after passing through the first plastic lens, thereby helping to reduce the tolerance sensitivity of the optical system. It is also possible to ensure that the distance d12 between the two plastic lenses and the middle thickness d1 and d2 of the two plastic lenses satisfy 0.5≤d12 / (d1+d2)≤5, so as to ensure that the light can smoothly transition in the optical system, and further improve the stability of the system. The shape of the lens can also be made relatively flat by controlling the middle thickness d2 of the second plastic lens and the vector heights SAG21 and SAG22 of its two side surfaces to satisfy 0.85≤d2 / (d2+SAG22-SAG21)≤2. On the one hand, it can make the light transition to the imaging surface more smoothly, and on the other hand, it can offset each other with the first plastic lens to achieve the purpose of thermal compensation. The second plastic lens can be set to be aspherical, and the field curvature aberration can be further corrected to improve the imaging quality.

[0091] According to the exemplary embodiment of the present application, the optical lens adopts a lens structure including two plastic lenses, and through the reasonable control of parameters such as the focus offset with temperature, optical focal length, refractive index temperature coefficient, thermal expansion coefficient, etc. of the two plastic lenses, as well as the optimization design of parameters such as the lens curvature radius, vector height, maximum effective aperture, etc., combined with the design of the overall structure of the lens, temperature compensation between the two plastic lenses can be achieved, so that the lens has the advantages of high clarity, small distortion, high temperature resistance, small aberration, wide visual range, etc., and can also effectively reduce production costs.

[0092] However, those skilled in the art should understand that, without departing from the technical solution claimed in the present application, the various results and advantages described in this specification can be obtained by reasonably setting the number of lenses constituting the lens as needed. Specific embodiments of the optical lens applicable to the above-mentioned embodiments are further described below with reference to the accompanying drawings.

[0093] Example 1

[0094] The following reference Figure 1 An optical lens according to Example 1 of the present application is described. Figure 1 A schematic structural diagram of an optical lens according to Example 1 of the present application is shown.

[0095] like Figure 1As shown, the optical lens includes a first lens L1, a second lens L2, an aperture STO, a third lens L3, a fourth lens L4, a fifth lens L5 and a sixth lens L6 in sequence from the first side to the second side along the optical axis, and also includes, for example, a filter and / or a protective glass and an image plane IMA located on the second side of the sixth lens L6, wherein the fifth lens L5 and the sixth lens L6 are cemented to form a doublet lens.

[0096] In this embodiment, the first lens L1 is a convex-concave lens with negative focal power, whose first side surface S1 is convex, and whose second side surface S2 is concave. The second lens L2 is a convex-concave lens with negative focal power, whose first side surface S3 is concave, and whose second side surface S4 is convex. The third lens L3 is a convex-convex lens with positive focal power, whose first side surface S5 is convex, and whose second side surface S6 is convex. The fourth lens L4 is a convex-convex lens with positive focal power, whose first side surface S7 is convex, and whose second side surface S8 is convex. The fifth lens L5 is a convex-concave lens with negative focal power, whose first side surface S9 is convex, and whose second side surface S10 is concave. The sixth lens L6 is a convex-concave lens with positive focal power, whose first side surface S10 is convex, and whose second side surface S11 is concave.

[0097] In this embodiment, the first lens L1, the second lens L2 and the sixth lens L6 are aspherical lenses. The first side surface S1 of the first lens L1, the first side surface S10 and the second side surface S11 of the sixth lens L6 have an inflection point.

[0098] In this embodiment, the second lens L2 and the sixth lens L6 are plastic lenses, and the remaining four lenses are glass lenses, wherein the second lens L2 is the first plastic lens of the optical lens of this embodiment, and the sixth lens L6 is the second plastic lens of the optical lens of this embodiment. Table 1 shows some parameter values ​​of the two plastic lenses in this embodiment.

[0099] Table 1

[0100]

[0101] Table 2, Table 3 and Table 4 show some conditions satisfied by the optical lens of this embodiment.

[0102] Table 2

[0103]

[0104] Table 3

[0105]

[0106] Table 4

[0107]

[0108] Fig. 27 1A to 1E in the figure respectively show the MTF diagrams of the optical lens according to Example 1 of the present application at temperatures of 15°C, 30°C, 50°C, 70°C and 90°C, Fig. 27 It can be seen that the optical lens provided in this embodiment has high resolution and good imaging quality.

[0109] Example 2

[0110] Figure 2 A schematic structural diagram of an optical lens according to Embodiment 2 of the present application is shown.

[0111] like Figure 2 As shown, the optical lens includes a first lens L1, a second lens L2, an aperture STO, a third lens L3, a fourth lens L4, a fifth lens L5 and a sixth lens L6 in sequence from the first side to the second side along the optical axis, and also includes, for example, a filter and / or a protective glass and an image plane IMA located on the second side of the sixth lens L6, wherein the fourth lens L4 and the fifth lens L5 are cemented to form a doublet lens.

[0112] In this embodiment, the first lens L1 is a convex-concave lens with negative focal power, whose first side surface S1 is convex, and whose second side surface S2 is concave. The second lens L2 is a convex-concave lens with negative focal power, whose first side surface S3 is concave, and whose second side surface S4 is convex. The third lens L3 is a convex-convex lens with positive focal power, whose first side surface S5 is convex, and whose second side surface S6 is convex. The fourth lens L4 is a convex-convex lens with positive focal power, whose first side surface S7 is convex, and whose second side surface S8 is convex. The fifth lens L5 is a convex-concave lens with negative focal power, whose first side surface S8 is concave, and whose second side surface S9 is convex. The sixth lens L6 is a convex-concave lens with positive focal power, whose first side surface S10 is convex, and whose second side surface S11 is concave.

[0113] In this embodiment, the first lens L1, the second lens L2 and the sixth lens L6 are aspherical lenses. The first side surface S10 and the second side surface S11 of the sixth lens L6 have an inflection point.

[0114] In this embodiment, the second lens L2 and the sixth lens L6 are plastic lenses, and the remaining four lenses are glass lenses, wherein the second lens L2 is the first plastic lens of the optical lens of this embodiment, and the sixth lens L6 is the second plastic lens of the optical lens of this embodiment. The following parameters of the two plastic lenses in this embodiment: dn / dt1, dn / dt2, CTE1, CTE2, σ1 and σ2 are the same as those shown in Table 1.

[0115] Table 5, Table 6 and Table 7 show some conditions satisfied by the optical lens of this embodiment.

[0116] Table 5

[0117]

[0118] Table 6

[0119]

[0120] Table 7

[0121]

[0122] Fig.28 2A to 2E in the figure respectively show the MTF diagrams of the optical lens according to Example 2 of the present application at temperatures of 15°C, 30°C, 50°C, 70°C and 90°C, Fig.28 It can be seen that the optical lens provided in this embodiment has high resolution and good imaging quality.

[0123] Example 3

[0124] Figure 3 A schematic structural diagram of an optical lens according to Example 3 of the present application is shown.

[0125] like Figure 3 As shown, the optical lens includes a first lens L1, a second lens L2, an aperture STO, a third lens L3, a fourth lens L4, a fifth lens L5 and a sixth lens L6 in sequence from the first side to the second side along the optical axis, and also includes, for example, a filter and / or a protective glass and an image plane IMA located on the second side of the sixth lens L6, wherein the fourth lens L4 and the fifth lens L5 are cemented to form a doublet lens.

[0126] In this embodiment, the first lens L1 is a convex-concave lens with negative focal power, whose first side surface S1 is convex, and whose second side surface S2 is concave. The second lens L2 is a convex-concave lens with positive focal power, whose first side surface S3 is concave, and whose second side surface S4 is convex. The third lens L3 is a convex-convex lens with positive focal power, whose first side surface S5 is convex, and whose second side surface S6 is convex. The fourth lens L4 is a convex-concave lens with negative focal power, whose first side surface S7 is convex, and whose second side surface S8 is concave. The fifth lens L5 is a convex-convex lens with positive focal power, whose first side surface S8 is convex, and whose second side surface S9 is convex. The sixth lens L6 is a convex-concave lens with negative focal power, whose first side surface S10 is convex, and whose second side surface S11 is concave.

[0127] In this embodiment, the first lens L1, the second lens L2 and the sixth lens L6 are aspherical lenses. The first side surface S10 and the second side surface S11 of the sixth lens L6 have an inflection point.

[0128] In this embodiment, the second lens L2 and the sixth lens L6 are plastic lenses, and the remaining four lenses are glass lenses, wherein the second lens L2 is the first plastic lens of the optical lens of this embodiment, and the sixth lens L6 is the second plastic lens of the optical lens of this embodiment. The following parameters of the two plastic lenses in this embodiment: dn / dt1, dn / dt2, CTE1, CTE2, σ1 and σ2 are the same as those shown in Table 1.

[0129] Tables 8, 9 and 10 show some conditions satisfied by the optical lens of this embodiment.

[0130] Table 8

[0131]

[0132] Table 9

[0133]

[0134] Table 10

[0135]

[0136] Fig.29 3A to 3E in the figure respectively show the MTF diagrams of the optical lens according to Example 3 of the present application at temperatures of 15°C, 30°C, 50°C, 70°C and 90°C, Fig.29 It can be seen that the optical lens provided in this embodiment has high resolution and good imaging quality.

[0137] Example 4

[0138] Figure 4 A schematic structural diagram of an optical lens according to Example 4 of the present application is shown.

[0139] like Figure 4 As shown, the optical lens includes a first lens L1, a second lens L2, an aperture STO, a third lens L3, a fourth lens L4, a fifth lens L5 and a sixth lens L6 in sequence from the first side to the second side along the optical axis, and also includes, for example, a filter and / or a protective glass and an image plane IMA located on the second side of the sixth lens L6, wherein the fourth lens L4 and the fifth lens L5 are cemented to form a doublet lens.

[0140] In this embodiment, the first lens L1 is a convex-concave lens with negative focal power, whose first side surface S1 is convex, and whose second side surface S2 is concave. The second lens L2 is a convex-concave lens with positive focal power, whose first side surface S3 is concave, and whose second side surface S4 is convex. The third lens L3 is a convex-convex lens with positive focal power, whose first side surface S5 is convex, and whose second side surface S6 is convex. The fourth lens L4 is a convex-convex lens with positive focal power, whose first side surface S7 is convex, and whose second side surface S8 is convex. The fifth lens L5 is a convex-concave lens with negative focal power, whose first side surface S8 is concave, and whose second side surface S9 is concave. The sixth lens L6 is a convex-concave lens with positive focal power, whose first side surface S10 is convex, and whose second side surface S11 is concave.

[0141] In this embodiment, the first lens L1, the second lens L2 and the sixth lens L6 are aspherical lenses. The first side surface S10 and the second side surface S11 of the sixth lens L6 have an inflection point.

[0142] In this embodiment, the second lens L2 and the sixth lens L6 are plastic lenses, and the remaining four lenses are glass lenses, wherein the second lens L2 is the first plastic lens of the optical lens of this embodiment; and the sixth lens L6 is the second plastic lens of the optical lens of this embodiment. The following parameters of the two plastic lenses in this embodiment: dn / dt1, dn / dt2, CTE1, CTE2, σ1 and σ2 are the same as those shown in Table 1.

[0143] Table 11, Table 12 and Table 13 show some conditions satisfied by the optical lens of this embodiment.

[0144] Table 11

[0145]

[0146] Table 12

[0147]

[0148] Table 13

[0149]

[0150] Fig.30 4A to 4E in the figure respectively show the MTF diagrams of the optical lens according to Example 4 of the present application at temperatures of 15°C, 30°C, 50°C, 70°C and 90°C, Fig.30 It can be seen that the optical lens provided in this embodiment has high resolution and good imaging quality.

[0151] Example 5

[0152] Figure 5A schematic structural diagram of an optical lens according to Example 5 of the present application is shown.

[0153] like Figure 5 As shown, the optical lens includes a first lens L1, a second lens L2, an aperture STO, a third lens L3, a fourth lens L4, a fifth lens L5 and a sixth lens L6 in sequence from the first side to the second side along the optical axis, and also includes, for example, a filter and / or a protective glass and an image plane IMA located on the second side of the sixth lens L6, wherein the fourth lens L4 and the fifth lens L5 are cemented to form a doublet lens.

[0154] In this embodiment, the first lens L1 is a concave-concave lens with negative focal power, whose first side surface S1 is concave, and whose second side surface S2 is concave. The second lens L2 is a concave-convex lens with positive focal power, whose first side surface S3 is concave, and whose second side surface S4 is convex. The third lens L3 is a convex-convex lens with positive focal power, whose first side surface S5 is convex, and whose second side surface S6 is convex. The fourth lens L4 is a convex-concave lens with negative focal power, whose first side surface S7 is convex, and whose second side surface S8 is concave. The fifth lens L5 is a convex-convex lens with positive focal power, whose first side surface S8 is convex, and whose second side surface S9 is convex. The sixth lens L6 is a convex-concave lens with negative focal power, whose first side surface S10 is convex, and whose second side surface S11 is concave.

[0155] In this embodiment, the first lens L1, the second lens L2 and the sixth lens L6 are aspherical lenses. The first side surface S10 and the second side surface S11 of the sixth lens L6 have an inflection point.

[0156] In this embodiment, the second lens L2 and the sixth lens L6 are plastic lenses, and the remaining four lenses are glass lenses, wherein the second lens L2 is the first plastic lens of the optical lens of this embodiment, and the sixth lens L6 is the second plastic lens of the optical lens of this embodiment. The following parameters of the two plastic lenses in this embodiment: dn / dt1, dn / dt2, CTE1, CTE2, σ1 and σ2 are shown in Table 14 below.

[0157] Table 14

[0158]

[0159] Table 15, Table 16 and Table 17 show some conditions satisfied by the optical lens of this embodiment.

[0160] Table 15

[0161]

[0162] Table 16

[0163]

[0164] Table 17

[0165]

[0166] Fig.31 5A to 5E in the figure respectively show the MTF diagrams of the optical lens according to Example 5 of the present application at temperatures of 15°C, 30°C, 50°C, 70°C and 90°C, Fig.31 It can be seen that the optical lens provided in this embodiment has high resolution and good imaging quality.

[0167] Example 6

[0168] Figure 6 A schematic structural diagram of an optical lens according to Example 6 of the present application is shown.

[0169] like Figure 6 As shown, the optical lens includes a first lens L1, a second lens L2, an aperture STO, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6 and a seventh lens L7 in sequence from the first side to the second side along the optical axis, and also includes, for example, a filter and / or a protective glass and an image plane IMA located on the second side of the seventh lens L7, wherein the fifth lens L5 and the sixth lens L6 are cemented to form a doublet lens.

[0170] In this embodiment, the first lens L1 is a concave-concave lens with negative focal power, whose first side surface S1 is concave, and whose second side surface S2 is concave. The second lens L2 is a concave-convex lens with positive focal power, whose first side surface S3 is concave, and whose second side surface S4 is convex. The third lens L3 is a convex-convex lens with positive focal power, whose first side surface S5 is convex, and whose second side surface S6 is convex. The fourth lens L4 is a convex-convex lens with positive focal power, whose first side surface S7 is convex, and whose second side surface S8 is convex. The fifth lens L5 is a convex-concave lens with negative focal power, whose first side surface S9 is convex, and whose second side surface S10 is concave. The sixth lens L6 is a convex-convex lens with positive focal power, whose first side surface S10 is convex, and whose second side surface S11 is convex. The seventh lens L7 is a convex-concave lens with negative focal power, whose first side surface S12 is convex, and whose second side surface S13 is concave.

[0171] In this embodiment, the first lens L1, the second lens L2 and the seventh lens L7 are aspherical lenses. The first side surface S12 and the second side surface S13 of the seventh lens L7 have an inflection point.

[0172] In this embodiment, the second lens L2 and the seventh lens L7 are plastic lenses, and the remaining five lenses are glass lenses, wherein the second lens L2 is the first plastic lens of the optical lens of this embodiment, and the seventh lens L7 is the second plastic lens of the optical lens of this embodiment. The following parameters of the two plastic lenses in this embodiment: dn / dt1, dn / dt2, CTE1, CTE2, σ1 and σ2 are shown in the following Table 18.

[0173] Table 18

[0174]

[0175] Table 19, Table 20 and Table 21 show some conditions satisfied by the optical lens of this embodiment.

[0176] Table 19

[0177]

[0178] Table 20

[0179]

[0180] Table 21

[0181]

[0182] Fig.32 6A to 6E in the figure respectively show the MTF diagrams of the optical lens according to Example 6 of the present application at temperatures of 15°C, 30°C, 50°C, 70°C and 90°C, Fig.32 It can be seen that the optical lens provided in this embodiment has high resolution and good imaging quality.

[0183] Example 7

[0184] Figure 7 A schematic structural diagram of an optical lens according to Example 7 of the present application is shown.

[0185] like Figure 7 As shown, the optical lens includes a first lens L1, a second lens L2, an aperture STO, a third lens L3, a fourth lens L4 and a fifth lens L5 in sequence from the first side to the second side along the optical axis, and also includes, for example, a filter and / or a protective glass and an image plane IMA located on the second side of the fifth lens L5, wherein the third lens L3 and the fourth lens L4 are cemented to form a double cemented lens.

[0186] In this embodiment, the first lens L1 is a convex-concave lens with negative focal power, whose first side surface S1 is convex, and whose second side surface S2 is concave. The second lens L2 is a convex-concave lens with positive focal power, whose first side surface S3 is concave, and whose second side surface S4 is convex. The third lens L3 is a convex-convex lens with positive focal power, whose first side surface S5 is convex, and whose second side surface S6 is convex. The fourth lens L4 is a convex-concave lens with negative focal power, whose first side surface S6 is concave, and whose second side surface S7 is convex. The fifth lens L5 is a convex-concave lens with positive focal power, whose first side surface S8 is convex, and whose second side surface S9 is concave.

[0187] In this embodiment, the first lens L1, the second lens L2 and the fifth lens L5 are aspherical lenses. The first side surface S8 and the second side surface S9 of the fifth lens L5 have an inflection point.

[0188] In this embodiment, the second lens L2 and the fifth lens L5 are plastic lenses, and the remaining three lenses are glass lenses, wherein the second lens L2 is the first plastic lens of the optical lens of this embodiment, and the fifth lens L5 is the second plastic lens of the optical lens of this embodiment. The following parameters of the two plastic lenses in this embodiment: dn / dt1, dn / dt2, CTE1, CTE2, σ1 and σ2 are shown in Table 22 below.

[0189] Table 22

[0190]

[0191] Table 23, Table 24 and Table 25 show some conditions satisfied by the optical lens of this embodiment.

[0192] Table 23

[0193]

[0194] Table 24

[0195]

[0196] Table 25

[0197]

[0198] Fig.33 7A to 7E in the figure respectively show the MTF diagrams of the optical lens according to Example 7 of the present application at temperatures of 15°C, 30°C, 50°C, 70°C and 90°C, Fig.33 It can be seen that the optical lens provided in this embodiment has high resolution and good imaging quality.

[0199] Example 8

[0200] Figure 8A schematic structural diagram of an optical lens according to Example 8 of the present application is shown.

[0201] like Figure 8 As shown, the optical lens includes a first lens L1, a second lens L2, an aperture STO, a third lens L3, a fourth lens L4, a fifth lens L5 and a sixth lens L6 in sequence from the first side to the second side along the optical axis, and also includes, for example, a filter and / or a protective glass and an image plane IMA located on the second side of the sixth lens L6, wherein the fourth lens L4 and the fifth lens L5 are cemented to form a doublet lens.

[0202] In this embodiment, the first lens L1 is a convex-concave lens with negative focal power, whose first side surface S1 is convex, and whose second side surface S2 is concave. The second lens L2 is a convex-concave lens with negative focal power, whose first side surface S3 is concave, and whose second side surface S4 is convex. The third lens L3 is a convex-convex lens with positive focal power, whose first side surface S5 is convex, and whose second side surface S6 is convex. The fourth lens L4 is a convex-convex lens with positive focal power, whose first side surface S7 is convex, and whose second side surface S8 is convex. The fifth lens L5 is a convex-concave lens with negative focal power, whose first side surface S8 is concave, and whose second side surface S9 is concave. The sixth lens L6 is a convex-concave lens with positive focal power, whose first side surface S10 is convex, and whose second side surface S11 is concave.

[0203] In this embodiment, the first lens L1, the second lens L2 and the sixth lens L6 are aspherical lenses. The first side surface S1 of the first lens L1, and the first side surface S10 and the second side surface S11 of the sixth lens L6 have an inflection point.

[0204] In this embodiment, the second lens L2 and the sixth lens L6 are plastic lenses, and the remaining four lenses are glass lenses, wherein the second lens L2 is the first plastic lens of the optical lens of this embodiment, and the sixth lens L6 is the second plastic lens of the optical lens of this embodiment. The following parameters of the two plastic lenses in this embodiment: dn / dt1, dn / dt2, CTE1, CTE2, σ1 and σ2 are shown in Table 26 below.

[0205] Table 26

[0206]

[0207] Table 27, Table 28 and Table 29 show some conditions satisfied by the optical lens of this embodiment.

[0208] Table 27

[0209]

[0210] Table 28

[0211]

[0212] Table 29

[0213]

[0214] Fig.34 8A to 8E in the figure respectively show the MTF diagrams of the optical lens according to Example 8 of the present application at temperatures of 15°C, 30°C, 50°C, 70°C and 90°C, Fig.34 It can be seen that the optical lens provided in this embodiment has high resolution and good imaging quality.

[0215] Example 9

[0216] Fig. 9 A schematic structural diagram of an optical lens according to Example 9 of the present application is shown.

[0217] like Fig. 9 As shown, the optical lens includes a first lens L1, a second lens L2, an aperture STO, a third lens L3, a fourth lens L4, a fifth lens L5 and a sixth lens L6 in sequence from the first side to the second side along the optical axis, and also includes, for example, a filter and / or a protective glass and an image plane IMA located on the second side of the sixth lens L6, wherein the fourth lens L4 and the fifth lens L5 are cemented to form a doublet lens.

[0218] In this embodiment, the refractive power and the surface shape of each lens of the first lens L1 to the sixth lens L6 are the same as those of the first lens L1 to the sixth lens L6 in Example 8, respectively.

[0219] In this embodiment, the first lens L1, the second lens L2 and the sixth lens L6 are aspherical lenses. The first side surface S1 of the first lens L1, and the first side surface S10 and the second side surface S11 of the sixth lens L6 have an inflection point.

[0220] In this embodiment, the second lens L2 and the sixth lens L6 are plastic lenses, and the remaining four lenses are glass lenses, wherein the second lens L2 is the first plastic lens of the optical lens of this embodiment; and the sixth lens L6 is the second plastic lens of the optical lens of this embodiment. The following parameters of the two plastic lenses in this embodiment: dn / dt1, dn / dt2, CTE1, CTE2, σ1 and σ2 are as shown in Table 26 in Example 8.

[0221] Table 30, Table 31 and Table 32 show some conditions satisfied by the optical lens of this embodiment.

[0222] Table 30

[0223]

[0224] Table 31

[0225]

[0226] Table 32

[0227]

[0228] Fig.35 9A to 9E in the figure respectively show the MTF diagrams of the optical lens according to Example 9 of the present application at temperatures of 15°C, 30°C, 50°C, 70°C and 90°C, Fig.35 It can be seen that the optical lens provided in this embodiment has high resolution and good imaging quality.

[0229] Example 10

[0230] Fig.10 A schematic structural diagram of an optical lens according to Example 10 of the present application is shown.

[0231] like Fig.10 As shown, the optical lens includes a first lens L1, a second lens L2, an aperture STO, a third lens L3, a fourth lens L4, a fifth lens L5 and a sixth lens L6 in sequence from the first side to the second side along the optical axis, and also includes, for example, a filter and / or a protective glass and an image plane IMA located on the second side of the sixth lens L6, wherein the fourth lens L4 and the fifth lens L5 are cemented to form a doublet lens.

[0232] In this embodiment, the first lens L1 is a convex-concave lens with negative focal power, whose first side surface S1 is convex, and whose second side surface S2 is concave. The second lens L2 is a convex-concave lens with negative focal power, whose first side surface S3 is concave, and whose second side surface S4 is convex. The third lens L3 is a convex-convex lens with positive focal power, whose first side surface S5 is convex, and whose second side surface S6 is convex. The fourth lens L4 is a convex-convex lens with positive focal power, whose first side surface S7 is convex, and whose second side surface S8 is convex. The fifth lens L5 is a convex-concave lens with negative focal power, whose first side surface S8 is concave, and whose second side surface S9 is convex. The sixth lens L6 is a convex-concave lens with positive focal power, whose first side surface S10 is convex, and whose second side surface S11 is concave.

[0233] In this embodiment, the first lens L1, the second lens L2 and the sixth lens L6 are aspherical lenses. The first side surface S10 and the second side surface S11 of the sixth lens L6 have an inflection point.

[0234] In this embodiment, the second lens L2 and the sixth lens L6 are plastic lenses, and the remaining four lenses are glass lenses, wherein the second lens L2 is the first plastic lens of the optical lens of this embodiment; and the sixth lens L6 is the second plastic lens of the optical lens of this embodiment. The following parameters of the two plastic lenses in this embodiment: dn / dt1, dn / dt2, CTE1, CTE2, σ1 and σ2 are as shown in Table 26 in Example 8.

[0235] Table 33, Table 34 and Table 35 show some conditions satisfied by the optical lens of this embodiment.

[0236] Table 33

[0237]

[0238] Table 34

[0239]

[0240] Table 35

[0241]

[0242] Fig.36 10A to 10E in the figure respectively show the MTF diagrams of the optical lens according to Example 10 of the present application at temperatures of 15°C, 30°C, 50°C, 70°C and 90°C, Fig.36 It can be seen that the optical lens provided in this embodiment has high resolution and good imaging quality.

[0243] Embodiment 11

[0244] Fig.11 A schematic structural diagram of an optical lens according to Example 11 of the present application is shown.

[0245] like Fig.11 As shown, the optical lens includes a first lens L1, a second lens L2, an aperture STO, a third lens L3, a fourth lens L4, a fifth lens L5 and a sixth lens L6 in sequence from the first side to the second side along the optical axis, and also includes, for example, a filter and / or a protective glass and an image plane IMA located on the second side of the sixth lens L6, wherein the fourth lens L4 and the fifth lens L5 are cemented to form a doublet lens.

[0246] In this embodiment, the refractive power and the surface shape of each lens of the first lens L1 to the sixth lens L6 are respectively the same as the refractive power and the surface shape of the first lens L1 to the sixth lens L6 in Embodiment 10.

[0247] In this embodiment, the first lens L1, the second lens L2 and the sixth lens L6 are aspherical lenses. The first side surface S10 and the second side surface S11 of the sixth lens L6 have an inflection point.

[0248] In this embodiment, the second lens L2 and the sixth lens L6 are plastic lenses, and the remaining four lenses are glass lenses, wherein the second lens L2 is the first plastic lens of the optical lens of this embodiment; and the sixth lens L6 is the second plastic lens of the optical lens of this embodiment. The following parameters of the two plastic lenses in this embodiment: dn / dt1, dn / dt2, CTE1, CTE2, σ1 and σ2 are as shown in Table 26 in Example 8.

[0249] Table 36, Table 37 and Table 38 show some conditions satisfied by the optical lens of this embodiment.

[0250] Table 36

[0251]

[0252] Table 37

[0253]

[0254] Table 38

[0255]

[0256] Fig.37 11A to 11E in the figure respectively show the MTF diagrams of the optical lens according to Example 11 of the present application at temperatures of 15°C, 30°C, 50°C, 70°C and 90°C, Fig.37 It can be seen that the optical lens provided in this embodiment has high resolution and good imaging quality.

[0257] Example 12

[0258] Fig.12 A schematic structural diagram of an optical lens according to Example 12 of the present application is shown.

[0259] like Fig.12 As shown, the optical lens includes a first lens L1, a second lens L2, an aperture STO, a third lens L3, a fourth lens L4, a fifth lens L5 and a sixth lens L6 in sequence from the first side to the second side along the optical axis, and also includes, for example, a filter and / or a protective glass and an image plane IMA located on the second side of the sixth lens L6, wherein the fourth lens L4 and the fifth lens L5 are cemented to form a doublet lens.

[0260] In this embodiment, the first lens L1 is a convex-concave lens with negative focal power, whose first side surface S1 is convex, and whose second side surface S2 is concave. The second lens L2 is a convex-concave lens with positive focal power, whose first side surface S3 is concave, and whose second side surface S4 is convex. The third lens L3 is a convex-convex lens with positive focal power, whose first side surface S5 is convex, and whose second side surface S6 is convex. The fourth lens L4 is a convex-concave lens with negative focal power, whose first side surface S7 is convex, and whose second side surface S8 is concave. The fifth lens L5 is a convex-convex lens with positive focal power, whose first side surface S8 is convex, and whose second side surface S9 is convex. The sixth lens L6 is a convex-concave lens with negative focal power, whose first side surface S10 is convex, and whose second side surface S11 is concave.

[0261] In this embodiment, the first lens L1, the second lens L2 and the sixth lens L6 are aspherical lenses. The first side surface S10 and the second side surface S11 of the sixth lens L6 have an inflection point.

[0262] In this embodiment, the second lens L2 and the sixth lens L6 are plastic lenses, and the remaining four lenses are glass lenses, wherein the second lens L2 is the first plastic lens of the optical lens of this embodiment; and the sixth lens L6 is the second plastic lens of the optical lens of this embodiment. The following parameters of the two plastic lenses in this embodiment: dn / dt1, dn / dt2, CTE1, CTE2, σ1 and σ2 are as shown in Table 26 in Example 8.

[0263] Table 39, Table 40 and Table 41 show some conditions satisfied by the optical lens of this embodiment.

[0264] Table 39

[0265]

[0266] Table 40

[0267]

[0268] Table 41

[0269]

[0270] Fig.38 12A to 12E in the figure respectively show the MTF diagrams of the optical lens according to Example 12 of the present application at temperatures of 15°C, 30°C, 50°C, 70°C and 90°C, Fig.38 It can be seen that the optical lens provided in this embodiment has high resolution and good imaging quality.

[0271] Embodiment 13

[0272] Fig.13A schematic structural diagram of an optical lens according to Example 13 of the present application is shown.

[0273] like Fig.13 As shown, the optical lens includes a first lens L1, a second lens L2, an aperture STO, a third lens L3, a fourth lens L4, a fifth lens L5 and a sixth lens L6 in sequence from the first side to the second side along the optical axis, and also includes, for example, a filter and / or a protective glass and an image plane IMA located on the second side of the sixth lens L6, wherein the fourth lens L4 and the fifth lens L5 are cemented to form a doublet lens.

[0274] In this embodiment, the refractive power and the surface shape of each lens of the first lens L1 to the sixth lens L6 are respectively the same as the refractive power and the surface shape of the first lens L1 to the sixth lens L6 in Embodiment 12.

[0275] In this embodiment, the first lens L1, the second lens L2 and the sixth lens L6 are aspherical lenses. The first side surface S10 and the second side surface S11 of the sixth lens L6 have an inflection point.

[0276] In this embodiment, the second lens L2 and the sixth lens L6 are plastic lenses, and the remaining four lenses are glass lenses, wherein the second lens L2 is the first plastic lens of the optical lens of this embodiment; and the sixth lens L6 is the second plastic lens of the optical lens of this embodiment. The following parameters of the two plastic lenses in this embodiment: dn / dt1, dn / dt2, CTE1, CTE2, σ1 and σ2 are as shown in Table 26 in Example 8.

[0277] Table 42, Table 43 and Table 44 show some conditions satisfied by the optical lens of this embodiment.

[0278] Table 42

[0279]

[0280] Table 43

[0281]

[0282] Table 44

[0283]

[0284] Fig.39 13A to 13E in the figure respectively show the MTF diagrams of the optical lens according to Example 13 of the present application at temperatures of 15°C, 30°C, 50°C, 70°C and 90°C, Fig.39 It can be seen that the optical lens provided in this embodiment has high resolution and good imaging quality.

[0285] Embodiment 14

[0286] Fig.14 A schematic structural diagram of an optical lens according to Example 14 of the present application is shown.

[0287] like Fig.14 As shown, the optical lens includes a first lens L1, a second lens L2, an aperture STO, a third lens L3, a fourth lens L4, a fifth lens L5 and a sixth lens L6 in sequence from the first side to the second side along the optical axis, and also includes, for example, a filter and / or a protective glass and an image plane IMA located on the second side of the sixth lens L6, wherein the fourth lens L4 and the fifth lens L5 are cemented to form a doublet lens.

[0288] In this embodiment, the first lens L1 is a convex-concave lens with negative focal power, whose first side surface S1 is convex, and whose second side surface S2 is concave. The second lens L2 is a convex-concave lens with positive focal power, whose first side surface S3 is concave, and whose second side surface S4 is convex. The third lens L3 is a convex-convex lens with positive focal power, whose first side surface S5 is convex, and whose second side surface S6 is convex. The fourth lens L4 is a convex-convex lens with positive focal power, whose first side surface S7 is convex, and whose second side surface S8 is convex. The fifth lens L5 is a convex-concave lens with negative focal power, whose first side surface S8 is concave, and whose second side surface S9 is concave. The sixth lens L6 is a convex-concave lens with positive focal power, whose first side surface S10 is convex, and whose second side surface S11 is concave.

[0289] In this embodiment, the first lens L1, the second lens L2 and the sixth lens L6 are aspherical lenses. The first side surface S10 and the second side surface S11 of the sixth lens L6 have an inflection point.

[0290] In this embodiment, the second lens L2 and the sixth lens L6 are plastic lenses, and the remaining four lenses are glass lenses, wherein the second lens L2 is the first plastic lens of the optical lens of this embodiment; and the sixth lens L6 is the second plastic lens of the optical lens of this embodiment. The following parameters of the two plastic lenses in this embodiment: dn / dt1, dn / dt2, CTE1, CTE2, σ1 and σ2 are as shown in Table 26 in Example 8.

[0291] Table 45, Table 46 and Table 47 show some conditions satisfied by the optical lens of this embodiment.

[0292] Table 45

[0293]

[0294] Table 46

[0295]

[0296] Table 47

[0297]

[0298] Fig.40 14A to 14E in the figure respectively show the MTF diagrams of the optical lens according to Example 14 of the present application at temperatures of 15°C, 30°C, 50°C, 70°C and 90°C, Fig.40 It can be seen that the optical lens provided in this embodiment has high resolution and good imaging quality.

[0299] Embodiment 15

[0300] Fig.15 A schematic structural diagram of an optical lens according to Example 15 of the present application is shown.

[0301] like Fig.15 As shown, the optical lens includes a first lens L1, a second lens L2, an aperture STO, a third lens L3, a fourth lens L4, a fifth lens L5 and a sixth lens L6 in sequence from the first side to the second side along the optical axis, and also includes, for example, a filter and / or a protective glass and an image plane IMA located on the second side of the sixth lens L6, wherein the fourth lens L4 and the fifth lens L5 are cemented to form a doublet lens.

[0302] In this embodiment, the refractive power and the surface shape of each lens of the first lens L1 to the sixth lens L6 are respectively the same as the refractive power and the surface shape of the first lens L1 to the sixth lens L6 in Example 14.

[0303] In this embodiment, the first lens L1, the second lens L2 and the sixth lens L6 are aspherical lenses. The first side surface S10 and the second side surface S11 of the sixth lens L6 have an inflection point.

[0304] In this embodiment, the second lens L2 and the sixth lens L6 are plastic lenses, and the remaining four lenses are glass lenses, wherein the second lens L2 is the first plastic lens of the optical lens of this embodiment; and the sixth lens L6 is the second plastic lens of the optical lens of this embodiment. The following parameters of the two plastic lenses in this embodiment: dn / dt1, dn / dt2, CTE1, CTE2, σ1 and σ2 are as shown in Table 26 in Example 8.

[0305] Table 48, Table 49 and Table 50 show some conditions satisfied by the optical lens of this embodiment.

[0306] Table 48

[0307]

[0308] Table 49

[0309]

[0310] Table 50

[0311]

[0312] Fig.41 15A to 15E in the figure respectively show the MTF diagrams of the optical lens according to Example 15 of the present application at temperatures of 15°C, 30°C, 50°C, 70°C and 90°C, Fig.41 It can be seen that the optical lens provided in this embodiment has high resolution and good imaging quality.

[0313] Example 16

[0314] Fig.16 A schematic structural diagram of an optical lens according to Example 16 of the present application is shown.

[0315] like Fig.16 As shown, the optical lens includes a first lens L1, a second lens L2, an aperture STO, a third lens L3, a fourth lens L4, a fifth lens L5 and a sixth lens L6 in sequence from the first side to the second side along the optical axis, and also includes, for example, a filter and / or a protective glass and an image plane IMA located on the second side of the sixth lens L6, wherein the fourth lens L4 and the fifth lens L5 are cemented to form a doublet lens.

[0316] In this embodiment, the first lens L1 is a concave-concave lens with negative focal power, whose first side surface S1 is concave, and whose second side surface S2 is concave. The second lens L2 is a concave-convex lens with positive focal power, whose first side surface S3 is concave, and whose second side surface S4 is convex. The third lens L3 is a convex-convex lens with positive focal power, whose first side surface S5 is convex, and whose second side surface S6 is convex. The fourth lens L4 is a convex-concave lens with negative focal power, whose first side surface S7 is convex, and whose second side surface S8 is concave. The fifth lens L5 is a convex-convex lens with positive focal power, whose first side surface S8 is convex, and whose second side surface S9 is convex. The sixth lens L6 is a convex-concave lens with negative focal power, whose first side surface S10 is convex, and whose second side surface S11 is concave.

[0317] In this embodiment, the first lens L1, the second lens L2 and the sixth lens L6 are aspherical lenses. The first side surface S10 and the second side surface S11 of the sixth lens L6 have an inflection point.

[0318] In this embodiment, the second lens L2 and the sixth lens L6 are plastic lenses, and the remaining four lenses are glass lenses, wherein the second lens L2 is the first plastic lens of the optical lens of this embodiment, and the sixth lens L6 is the second plastic lens of the optical lens of this embodiment. The following parameters of the two plastic lenses in this embodiment: dn / dt1, dn / dt2, CTE1, CTE2, σ1 and σ2 are shown in the following Table 51.

[0319] Table 51

[0320]

[0321] Table 52, Table 53 and Table 54 show some conditions satisfied by the optical lens of this embodiment.

[0322] Table 52

[0323]

[0324] Table 53

[0325]

[0326] Table 54

[0327]

[0328] Fig.42 16A to 16E in the figure respectively show the MTF diagrams of the optical lens according to Example 16 of the present application at temperatures of 15°C, 30°C, 50°C, 70°C and 90°C, Fig.42 It can be seen that the optical lens provided in this embodiment has high resolution and good imaging quality.

[0329] Embodiment 17

[0330] Fig.17 A schematic structural diagram of an optical lens according to Example 17 of the present application is shown.

[0331] like Fig.17 As shown, the optical lens includes a first lens L1, a second lens L2, an aperture STO, a third lens L3, a fourth lens L4, a fifth lens L5 and a sixth lens L6 in sequence from the first side to the second side along the optical axis, and also includes, for example, a filter and / or a protective glass and an image plane IMA located on the second side of the sixth lens L6, wherein the fourth lens L4 and the fifth lens L5 are cemented to form a doublet lens.

[0332] In this embodiment, the refractive power and the surface shape of each lens of the first lens L1 to the sixth lens L6 are respectively the same as the refractive power and the surface shape of the first lens L1 to the sixth lens L6 in Example 16.

[0333] In this embodiment, the first lens L1, the second lens L2 and the sixth lens L6 are aspherical lenses. The first side surface S10 and the second side surface S11 of the sixth lens L6 have an inflection point.

[0334] In this embodiment, the second lens L2 and the sixth lens L6 are plastic lenses, and the remaining four lenses are glass lenses, wherein the second lens L2 is the first plastic lens of the optical lens of this embodiment; and the sixth lens L6 is the second plastic lens of the optical lens of this embodiment. The following parameters of the two plastic lenses in this embodiment: dn / dt1, dn / dt2, CTE1, CTE2, σ1 and σ2 have the same values ​​as those shown in Table 51 of Example 16.

[0335] Table 55, Table 56 and Table 57 show some conditions satisfied by the optical lens of this embodiment.

[0336] Table 55

[0337]

[0338] Table 56

[0339]

[0340] Table 57

[0341]

[0342] Fig.43 17A to 17E in the figure respectively show the MTF diagrams of the optical lens according to Example 17 of the present application at temperatures of 15°C, 30°C, 50°C, 70°C and 90°C, Fig.43 It can be seen that the optical lens provided in this embodiment has high resolution and good imaging quality.

[0343] Embodiment 18

[0344] Fig.18 A schematic structural diagram of an optical lens according to Example 18 of the present application is shown.

[0345] like Fig.18 As shown, the optical lens includes a first lens L1, a second lens L2, an aperture STO, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6 and a seventh lens L7 in sequence from the first side to the second side along the optical axis, and also includes, for example, a filter and / or a protective glass and an image plane IMA located on the second side of the seventh lens L7, wherein the fifth lens L5 and the sixth lens L6 are cemented to form a doublet lens.

[0346] In this embodiment, the first lens L1 is a concave-concave lens with negative focal power, whose first side surface S1 is concave, and whose second side surface S2 is concave. The second lens L2 is a concave-convex lens with positive focal power, whose first side surface S3 is concave, and whose second side surface S4 is convex. The third lens L3 is a convex-convex lens with positive focal power, whose first side surface S5 is convex, and whose second side surface S6 is convex. The fourth lens L4 is a convex-convex lens with positive focal power, whose first side surface S7 is convex, and whose second side surface S8 is convex. The fifth lens L5 is a convex-concave lens with negative focal power, whose first side surface S9 is convex, and whose second side surface S10 is concave. The sixth lens L6 is a convex-convex lens with positive focal power, whose first side surface S10 is convex, and whose second side surface S11 is convex. The seventh lens L7 is a convex-concave lens with negative focal power, whose first side surface S12 is convex, and whose second side surface S13 is concave.

[0347] In this embodiment, the first lens L1, the second lens L2 and the seventh lens L7 are aspherical lenses. The first side surface S12 and the second side surface S13 of the seventh lens L7 have an inflection point.

[0348] In this embodiment, the second lens L2 and the seventh lens L7 are plastic lenses, and the remaining five lenses are glass lenses, wherein the second lens L2 is the first plastic lens of the optical lens of this embodiment, and the seventh lens L7 is the second plastic lens of the optical lens of this embodiment. The following parameters of the two plastic lenses in this embodiment: dn / dt1, dn / dt2, CTE1, CTE2, σ1 and σ2 are shown in the following Table 58.

[0349] Table 58

[0350]

[0351] Table 59, Table 60 and Table 61 show some conditions satisfied by the optical lens of this embodiment.

[0352] Table 59

[0353]

[0354] Table 60

[0355]

[0356] Table 61

[0357]

[0358] Fig.44 18A to 18E in the figure respectively show the MTF diagrams of the optical lens according to Example 18 of the present application at temperatures of 15°C, 30°C, 50°C, 70°C and 90°C, Fig.44It can be seen that the optical lens provided in this embodiment has high resolution and good imaging quality.

[0359] Embodiment 19

[0360] Fig.19 A schematic structural diagram of an optical lens according to Example 19 of the present application is shown.

[0361] like Fig.19 As shown, the optical lens includes a first lens L1, a second lens L2, an aperture STO, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6 and a seventh lens L7 in sequence from the first side to the second side along the optical axis, and also includes, for example, a filter and / or a protective glass and an image plane IMA located on the second side of the seventh lens L7, wherein the fifth lens L5 and the sixth lens L6 are cemented to form a doublet lens.

[0362] In this embodiment, the refractive power and surface shape of each lens of the first lens L1 to the seventh lens L7 are respectively the same as the refractive power and surface shape of the first lens L1 to the seventh lens L7 in Example 18.

[0363] In this embodiment, the first lens L1, the second lens L2 and the seventh lens L7 are aspherical lenses. The first side surface S12 and the second side surface S13 of the seventh lens L7 have an inflection point.

[0364] In this embodiment, the second lens L2 and the seventh lens L7 are plastic lenses, and the remaining five lenses are glass lenses, wherein the second lens L2 is the first plastic lens of the optical lens of this embodiment; and the seventh lens L7 is the second plastic lens of the optical lens of this embodiment. The following parameters of the two plastic lenses in this embodiment: dn / dt1, dn / dt2, CTE1, CTE2, σ1, and σ2 have the same corresponding values ​​as those shown in Table 58 of Example 18.

[0365] Table 62, Table 63 and Table 64 show some conditions satisfied by the optical lens of this embodiment.

[0366] Table 62

[0367]

[0368] Table 63

[0369]

[0370] Table 64

[0371]

[0372] Fig.4519A to 19E in the figure respectively show the MTF diagrams of the optical lens according to Example 19 of the present application at temperatures of 15°C, 30°C, 50°C, 70°C and 90°C, Fig.45 It can be seen that the optical lens provided in this embodiment has high resolution and good imaging quality.

[0373] Embodiment 20

[0374] Fig. 20 A schematic structural diagram of an optical lens according to Example 20 of the present application is shown.

[0375] like Fig. 20 As shown, the optical lens includes a first lens L1, a second lens L2, an aperture STO, a third lens L3, a fourth lens L4 and a fifth lens L5 in sequence from the first side to the second side along the optical axis, and also includes, for example, a filter and / or a protective glass and an image plane IMA located on the second side of the fifth lens L5, wherein the third lens L3 and the fourth lens L4 are cemented to form a double cemented lens.

[0376] In this embodiment, the first lens L1 is a convex-concave lens with negative focal power, whose first side surface S1 is convex, and whose second side surface S2 is concave. The second lens L2 is a convex-concave lens with positive focal power, whose first side surface S3 is concave, and whose second side surface S4 is convex. The third lens L3 is a convex-convex lens with positive focal power, whose first side surface S5 is convex, and whose second side surface S6 is convex. The fourth lens L4 is a convex-concave lens with negative focal power, whose first side surface S6 is concave, and whose second side surface S7 is convex. The fifth lens L5 is a convex-concave lens with positive focal power, whose first side surface S8 is convex, and whose second side surface S9 is concave.

[0377] In this embodiment, the first lens L1, the second lens L2 and the fifth lens L5 are aspherical lenses. The first side surface S8 and the second side surface S9 of the fifth lens L5 have an inflection point.

[0378] In this embodiment, the second lens L2 and the fifth lens L5 are plastic lenses, and the remaining three lenses are glass lenses, wherein the second lens L2 is the first plastic lens of the optical lens of this embodiment, and the fifth lens L5 is the second plastic lens of the optical lens of this embodiment. The following parameters of the two plastic lenses in this embodiment: dn / dt1, dn / dt2, CTE1, CTE2, σ1 and σ2 are shown in the following Table 65.

[0379] Table 65

[0380]

[0381] Table 66, Table 67 and Table 68 show some conditions satisfied by the optical lens of this embodiment.

[0382] Table 66

[0383]

[0384] Table 67

[0385]

[0386] Table 68

[0387]

[0388] Fig.46 20A to 20E in the figure respectively show the MTF diagrams of the optical lens according to Example 20 of the present application at temperatures of 15°C, 30°C, 50°C, 70°C and 90°C, Fig.46 It can be seen that the optical lens provided in this embodiment has high resolution and good imaging quality.

[0389] Embodiment 21

[0390] Fig.21 A schematic structural diagram of an optical lens according to Example 21 of the present application is shown.

[0391] like Fig.21 As shown, the optical lens includes a first lens L1, a second lens L2, an aperture STO, a third lens L3, a fourth lens L4 and a fifth lens L5 in sequence from the first side to the second side along the optical axis, and also includes, for example, a filter and / or a protective glass and an image plane IMA located on the second side of the fifth lens L5, wherein the third lens L3 and the fourth lens L4 are cemented to form a double cemented lens.

[0392] In this embodiment, the refractive power and the surface shape of each lens of the first lens L1 to the fifth lens L5 are respectively the same as the refractive power and the surface shape of the first lens L1 to the fifth lens L5 in Example 20.

[0393] In this embodiment, the first lens L1, the second lens L2 and the fifth lens L5 are aspherical lenses. The first side surface S8 and the second side surface S9 of the fifth lens L5 have an inflection point.

[0394] In this embodiment, the second lens L2 and the fifth lens L5 are plastic lenses, and the other three lenses are glass lenses, wherein the second lens L2 is the first plastic lens of the optical lens of this embodiment, and the fifth lens L5 is the second plastic lens of the optical lens of this embodiment. The following parameters of the two plastic lenses in this embodiment: dn / dt1, dn / dt2, CTE1, CTE2, σ1 and σ2 have the same corresponding values ​​as those shown in Table 65 of Example 20.

[0395] Table 69, Table 70 and Table 71 show some conditions satisfied by the optical lens of this embodiment.

[0396] Table 69

[0397]

[0398] Table 70

[0399]

[0400] Table 71

[0401]

[0402] Fig.47 21A to 21E in the figure respectively show the MTF diagrams of the optical lens according to Example 21 of the present application at temperatures of 15°C, 30°C, 50°C, 70°C and 90°C, Fig.47 It can be seen that the optical lens provided in this embodiment has high resolution and good imaging quality.

[0403] Embodiment 22

[0404] Fig. 22 A schematic structural diagram of an optical lens according to Example 22 of the present application is shown.

[0405] like Fig. 22 As shown, the optical lens includes a first lens L1, a second lens L2, an aperture STO, a third lens L3, a fourth lens L4, a fifth lens L5 and a sixth lens L6 in sequence from the first side to the second side along the optical axis, and also includes, for example, a filter and / or a protective glass and an image plane IMA located on the second side of the sixth lens L6, wherein the fourth lens L4 and the fifth lens L5 are cemented to form a doublet lens.

[0406] In this embodiment, the first lens L1 is a convex-concave lens with negative focal power, whose first side surface S1 is convex, and whose second side surface S2 is concave. The second lens L2 is a convex-concave lens with negative focal power, whose first side surface S3 is concave, and whose second side surface S4 is convex. The third lens L3 is a convex-convex lens with positive focal power, whose first side surface S5 is convex, and whose second side surface S6 is convex. The fourth lens L4 is a convex-convex lens with positive focal power, whose first side surface S7 is convex, and whose second side surface S8 is convex. The fifth lens L5 is a convex-concave lens with negative focal power, whose first side surface S8 is concave, and whose second side surface S9 is concave. The sixth lens L6 is a convex-concave lens with positive focal power, whose first side surface S10 is convex, and whose second side surface S11 is concave.

[0407] In this embodiment, the first lens L1 is an aspherical lens. The first side surface S1 of the first lens L1 and the first side surface S10 and the second side surface S11 of the sixth lens L6 have an inflection point.

[0408] In this embodiment, the second lens L2 and the sixth lens L6 are plastic lenses, and the remaining four lenses are glass lenses, wherein the second lens L2 is the first plastic lens of the optical lens of this embodiment; and the sixth lens L6 is the second plastic lens of the optical lens of this embodiment. The following parameters of the two plastic lenses in this embodiment: dn / dt1, dn / dt2, CTE1, CTE2, σ1 and σ2 have the same corresponding values ​​as those shown in Table 65 of Example 20.

[0409] Table 72, Table 73 and Table 74 show some conditions satisfied by the optical lens of this embodiment.

[0410] Table 72

[0411]

[0412] Table 73

[0413]

[0414] Table 74

[0415]

[0416] Fig.48 22A to 22E in the figure respectively show the MTF diagrams of the optical lens according to Example 22 of the present application at temperatures of 15°C, 30°C, 50°C, 70°C and 90°C, Fig.48 It can be seen that the optical lens provided in this embodiment has high resolution and good imaging quality.

[0417] Embodiment 23

[0418] Fig.23 A schematic structural diagram of an optical lens according to Example 23 of the present application is shown.

[0419] like Fig.23 As shown, the optical lens includes a first lens L1, an aperture STO, a second lens L2 and a third lens L3 in sequence from the first side to the second side along the optical axis, and also includes, for example, a filter and / or a protective glass and an image plane IMA located on the second side of the third lens L3.

[0420] In this embodiment, the first lens L1 is a convex-concave lens with positive power, whose first side surface S1 is convex and whose second side surface S2 is concave. The second lens L2 is a convex-concave lens with positive power, whose first side surface S3 is concave and whose second side surface S4 is convex. The third lens L3 is a convex-concave lens with positive power, whose first side surface S5 is convex and whose second side surface S6 is concave.

[0421] In this embodiment, the second lens L2 and the third lens L3 are aspherical lenses. The first side surface S5 and the second side surface S6 of the third lens L3 have an inflection point.

[0422] In this embodiment, the second lens L2 and the third lens L3 are plastic lenses, and the first lens L1 is a glass lens, wherein the second lens L2 is the first plastic lens of the optical lens of this embodiment, and the third lens L3 is the second plastic lens of the optical lens of this embodiment. The following parameters of the two plastic lenses in this embodiment: dn / dt1, dn / dt2, CTE1, CTE2, σ1 and σ2 are shown in Table 75 below.

[0423] Table 75

[0424]

[0425] Table 76, Table 77 and Table 78 show some conditions satisfied by the optical lens of this embodiment.

[0426] Table 76

[0427]

[0428] Table 77

[0429]

[0430] Table 78

[0431]

[0432] Fig.49 23A to 23E in the figure respectively show the MTF diagrams of the optical lens according to Example 23 of the present application at temperatures of 15°C, 30°C, 50°C, 70°C and 90°C, Fig.49 It can be seen that the optical lens provided in this embodiment has high resolution and good imaging quality.

[0433] Embodiment 24

[0434] Fig.24 A schematic structural diagram of an optical lens according to Example 24 of the present application is shown.

[0435] like Fig.24As shown, the optical lens includes a first lens L1, a second lens L2, an aperture STO and a third lens L3 in sequence from the first side to the second side along the optical axis, and also includes, for example, a filter and / or a protective glass and an image plane IMA located on the second side of the third lens L3.

[0436] In this embodiment, the first lens L1 is a convex-concave lens with negative power, whose first side surface S1 is convex and whose second side surface S2 is concave. The second lens L2 is a convex-convex lens with positive power, whose first side surface S3 is convex and whose second side surface S4 is convex. The third lens L3 is a convex-convex lens with positive power, whose first side surface S5 is convex and whose second side surface S6 is convex.

[0437] In this embodiment, the first lens L1 and the third lens L3 are aspherical lenses. The first side surface S1 of the first lens L1 and the first side surface S5 of the third lens L3 have an inflection point.

[0438] In this embodiment, the first lens L1 and the third lens L3 are plastic lenses, and the second lens L2 is a glass lens, wherein the first lens L1 is the first plastic lens of the optical lens of this embodiment, and the third lens L3 is the second plastic lens of the optical lens of this embodiment. The following parameters of the two plastic lenses in this embodiment: dn / dt1, dn / dt2, CTE1, CTE2, σ1 and σ2 are shown in Table 79 below.

[0439] Table 79

[0440]

[0441] Table 80, Table 81 and Table 82 show some conditions satisfied by the optical lens of this embodiment.

[0442] Table 80

[0443]

[0444] Table 81

[0445]

[0446] Table 82

[0447]

[0448] Fig.50 24A to 24E in the figure respectively show the MTF diagrams of the optical lens according to Example 24 of the present application at temperatures of 15°C, 30°C, 50°C, 70°C and 90°C, Fig.50 It can be seen that the optical lens provided in this embodiment has high resolution and good imaging quality.

[0449] Embodiment 25

[0450] Fig.25 A schematic structural diagram of an optical lens according to Example 25 of the present application is shown.

[0451] like Fig.25 As shown, the optical lens includes a first lens L1, a second lens L2, a third lens L3, an aperture STO and a fourth lens L4 in sequence from the first side to the second side along the optical axis, and also includes, for example, a filter and / or a protective glass and an image plane IMA located on the second side of the fourth lens L4.

[0452] In this embodiment, the first lens L1 is a convex-concave lens with negative power, whose first side surface S1 is convex and whose second side surface S2 is concave. The second lens L2 is a convex-concave lens with negative power, whose first side surface S3 is concave and whose second side surface S4 is concave. The third lens L3 is a convex-convex lens with positive power, whose first side surface S5 is convex and whose second side surface S6 is convex. The fourth lens L4 is a convex-convex lens with positive power, whose first side surface S7 is convex and whose second side surface S8 is convex.

[0453] In this embodiment, the second lens L2 and the fourth lens L4 are aspherical lenses. The first side surface S3 of the second lens L2 and the second side surface S8 of the fourth lens L4 have an inflection point.

[0454] In this embodiment, the second lens L2 and the fourth lens L4 are plastic lenses, and the other two lenses are glass lenses, wherein the second lens L2 is the first plastic lens of the optical lens of this embodiment; and the fourth lens L4 is the second plastic lens of the optical lens of this embodiment. The following parameters of the two plastic lenses in this embodiment: dn / dt1, dn / dt2, CTE1, CTE2, σ1 and σ2 have the same corresponding values ​​as those shown in Table 79 of Example 24.

[0455] Table 83, Table 84 and Table 85 show some conditions satisfied by the optical lens of this embodiment.

[0456] Table 83

[0457]

[0458] Table 84

[0459]

[0460] Table 85

[0461]

[0462] Fig.5125A to 25E in the figure respectively show the MTF diagrams of the optical lens according to Example 25 of the present application at temperatures of 15°C, 30°C, 50°C, 70°C and 90°C, Fig.51 It can be seen that the optical lens provided in this embodiment has high resolution and good imaging quality.

[0463] Embodiment 26

[0464] Fig.26 A schematic structural diagram of an optical lens according to Example 26 of the present application is shown.

[0465] like Fig.26 As shown, the optical lens includes a first lens L1, a second lens L2, a third lens L3, an aperture STO, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7 and an eighth lens L8 in sequence from the first side to the second side along the optical axis, and also includes, for example, a filter and / or a protective glass and an image plane IMA located on the second side of the fourth lens L4, wherein the sixth lens L6 and the seventh lens L7 are cemented to form a doublet lens.

[0466] In this embodiment, the first lens L1 is a convex-concave lens with negative focal power, wherein the first side surface S1 is a convex surface, and the second side surface S2 is a concave surface. The second lens L2 is a convex-concave lens with positive focal power, wherein the first side surface S3 is a concave surface, and the second side surface S4 is a convex surface. The third lens L3 is a convex-concave lens with negative focal power, wherein the first side surface S5 is a concave surface, and the second side surface S6 is a convex surface. The fourth lens L4 is a convex-convex lens with positive focal power, wherein the first side surface S7 is a convex surface, and the second side surface S8 is a convex surface. The fifth lens L5 is a convex-convex lens with positive focal power, wherein the first side surface S9 is a convex surface, and the second side surface S10 is a convex surface. The sixth lens L6 is a convex-convex lens with positive focal power, wherein the first side surface S11 is a convex surface, and the second side surface S12 is a convex surface. The seventh lens L7 is a convex-concave lens with negative focal power, wherein the first side surface S12 is a concave surface, and the second side surface S13 is a convex surface. The eighth lens L8 is a convex-concave lens with positive refractive power, wherein the first side surface S14 is a convex surface, and the second side surface S15 is a concave surface.

[0467] In this embodiment, the second lens L2 and the sixth lens L6 are aspherical lenses. The first side surface S14 and the second side surface S15 of the eighth lens L8 have an inflection point.

[0468] In this embodiment, the second lens L2 and the eighth lens L8 are plastic lenses, and the remaining six lenses are glass lenses, wherein the second lens L2 is the first plastic lens of the optical lens of this embodiment, and the eighth lens L8 is the second plastic lens of the optical lens of this embodiment. The following parameters of the two plastic lenses in this embodiment: dn / dt1, dn / dt2, CTE1, CTE2, σ1 and σ2 are shown in the following Table 86.

[0469] Table 86

[0470]

[0471] Tables 87, 88 and 89 show some conditions satisfied by the optical lens of this embodiment.

[0472] Table 87

[0473]

[0474] Table 88

[0475]

[0476] Table 89

[0477]

[0478] Fig.52 26A to 26E in the figure respectively show the MTF diagrams of the optical lens according to Example 26 of the present application at temperatures of 15°C, 30°C, 50°C, 70°C and 90°C, Fig.52 It can be seen that the optical lens provided in this embodiment has high resolution and good imaging quality.

[0479] In summary, some parameter values ​​in Examples 1 to 26 are shown in Tables 90, 91 and 92, respectively, where the units of F, F1, F2, R11, R12, R21, R22, D11, D21, D22, d1, d2, SAG11, SAG12, SAG21, SAG22, d12 and TTL are all in mm. , 1 and 2The unit is mm -1 .

[0480] Table 90

[0481]

[0482] Table 91

[0483]

[0484] Table 92

[0485]

[0486] Furthermore, Examples 1 to 26 respectively satisfy the relationships shown in Tables 93, 94, 95 and 96 below.

[0487] Table 93

[0488]

[0489] Table 94

[0490]

[0491] Table 95

[0492]

[0493] Table 96

[0494]

[0495] The present application also provides an electronic device, which may include an optical lens according to the above-mentioned embodiment of the present application and an imaging element for converting an optical image formed by the optical lens into an electrical signal. The electronic device may be an independent electronic device such as a detection distance camera, or an imaging module integrated in a device such as a detection distance device. In addition, the electronic device may also be an independent imaging device such as a vehicle-mounted camera, or an imaging module integrated in a driving assistance system such as a vehicle-mounted camera.

[0496] The above description is only a preferred embodiment of the present application and an explanation of the technical principles used. Those skilled in the art should understand that the scope of the invention involved in the present application is not limited to the technical solution formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the inventive concept. For example, the above features are replaced with the technical features with similar functions disclosed in this application (but not limited to) by each other to form a technical solution.

Claims

1. An optical lens, characterized in that: The invention comprises at least three lenses with optical power arranged along the optical axis, two of which are plastic lenses and the remaining lenses are glass lenses; The two plastic lenses are respectively a first plastic lens arranged first from the first side to the second side along the optical axis and a second plastic lens arranged last from the first side to the second side along the optical axis; and The optical lens meets the following requirements: 0.001≤| 1 / |+| 2 / |≤2.5； -25≤σ1× 1+σ2× 2≤30; in, 1 is the focal length of the first plastic lens, 2 is the optical power of the second plastic lens, is the total optical power of the optical lens, σ1 is the focus offset of the first plastic lens with temperature, and σ2 is the focus offset of the second plastic lens with temperature.

2. The optical lens according to claim 1, characterized in that: At least one of the first plastic lens and the second plastic lens has positive refractive power.

3. The optical lens according to claim 1, characterized in that: The optical lens meets at least one of the following conditions: 0≤|σ1× 1|≤100;0≤|σ2× 2|≤100。 4. The optical lens according to claim 1, characterized in that: The total focal length F of the optical lens satisfies: -250≤σ1 / F+σ2 / F≤-50.

5. The optical lens according to claim 1, characterized in that: The optical lens meets at least one of the following conditions: -20≤F1 / (dn / dt1); -20≤F2 / (dn / dt2)≤50; Wherein, F1 is the effective focal length of the first plastic lens, dn / dt1 is the refractive index temperature coefficient of the first plastic lens, F2 is the effective focal length of the second plastic lens, and dn / dt2 is the refractive index temperature coefficient of the second plastic lens.

6. The optical lens according to claim 1, characterized in that: The refractive index temperature coefficient dn / dt2 of the second plastic lens and the refractive index temperature coefficient dn / dt1 of the first plastic lens satisfy: 0≤|dn / dt2-dn / dt1|≤50.

7. The optical lens according to claim 1, characterized in that: The refractive index temperature coefficient dn / dt1 of the first plastic lens and the refractive index temperature coefficient dn / dt2 of the second plastic lens satisfy: 0≤| 1×(dn / dt1)+ 2×(dn / dt2)|≤20。 8. The optical lens according to claim 1, characterized in that: The refractive index temperature coefficient dn / dt1 of the first plastic lens, the refractive index temperature coefficient dn / dt2 of the second plastic lens, the effective focal length F1 of the first plastic lens, and the effective focal length F2 of the second plastic lens satisfy: 0≤|(dn / dt1+dn / dt2) / (F1+F2)|≤200.

9. The optical lens according to claim 1, characterized in that: The optical lens meets at least one of the following conditions: 0.0001≤|dn / dt1×CTE1×F1(10 -6 mm / ℃ 2 )|;0≤|dn / dt2×CTE2×F2(10 -6 mm / ℃ 2 )|≤90; Among them, dn / dt1 is the refractive index temperature coefficient of the first plastic lens, CTE1 is the thermal expansion coefficient of the first plastic lens, F1 is the effective focal length of the first plastic lens, dn / dt2 is the refractive index temperature coefficient of the second plastic lens, CTE2 is the thermal expansion coefficient of the second plastic lens, and F2 is the effective focal length of the second plastic lens.

10. The optical lens according to claim 1, characterized in that: The refractive index temperature coefficient dn / dt1 of the first plastic lens and the thermal expansion coefficient CTE1 of the first plastic lens and the refractive index temperature coefficient dn / dt2 of the second plastic lens and the thermal expansion coefficient CTE2 of the second plastic lens satisfy: -0.0075≤dn / dt1×CTE1× 1+dn / dt2×CTE2× 2≤0.0075。 11. The optical lens according to claim 1, characterized in that: The sag SAG12 of the second side surface of the first plastic lens and the sag SAG22 of the second side surface of the second plastic lens satisfy: 70≤|SAG12×σ1+SAG22×σ2|≤600.

12. The optical lens according to claim 1, characterized in that: The thermal expansion coefficient CTE1 of the first plastic lens and the thermal expansion coefficient CTE2 of the second plastic lens satisfy: 100≤CTE1× +CTE2× ≤650。 13. The optical lens according to claim 1, characterized in that: The optical lens satisfies at least one of the following conditions: -1.5≤(R11-R12) / (R11+R12)≤8; -5≤(R21-R22) / (R21+R22)≤5; Among them, R11 is the curvature radius of the first side surface of the first plastic lens, R12 is the curvature radius of the second side surface of the first plastic lens, R21 is the curvature radius of the first side surface of the second plastic lens, and R22 is the curvature radius of the second side surface of the second plastic lens.

14. The optical lens according to claim 1, characterized in that: The curvature radius R11 of the first side surface of the first plastic lens and the curvature radius R12 of the second side surface of the first plastic lens satisfy: -5≤R11 / R12≤10.

15. The optical lens according to claim 1, characterized in that: The curvature radius R11 of the first side surface of the first plastic lens and the maximum effective aperture D11 of the first side surface of the first plastic lens satisfy: R11 / D11≤2.

16. The optical lens according to claim 1, characterized in that: The optical lens meets the following requirements: R21 / d2≤75 or -15≤R22 / d2≤30, Wherein, R21 is the curvature radius of the first side surface of the second plastic lens, d2 is the center thickness of the second plastic lens on the optical axis, and R22 is the curvature radius of the second side surface of the second plastic lens.

17. The optical lens according to claim 1, characterized in that: The vector height SAG21 of the first side surface of the second plastic lens, the maximum effective aperture D21 of the first side surface of the second plastic lens, the vector height SAG22 of the second side surface of the second plastic lens, and the maximum effective aperture D22 of the second side surface of the second plastic lens satisfy: -5≤(SAG21 / D21) / (SAG22 / D22)≤15.

18. The optical lens according to claim 1, characterized in that: The total focal length F of the optical lens, the radius of curvature R21 of the first side surface of the second plastic lens, and the radius of curvature R22 of the second side surface of the second plastic lens satisfy: |F / R21|+|F / R22|≤7.

19. The optical lens according to claim 1, characterized in that: The optical lens meets at least one of the following conditions: |F1 / F|≥0.8;1.5≤|F2 / F|≤200; Among them, F1 is the effective focal length of the first plastic lens, F is the total focal length of the optical lens, and F2 is the effective focal length of the second plastic lens.

20. The optical lens according to claim 19, characterized in that: When the number of lenses with optical power in the optical lens is greater than four, the optical lens satisfies at least one of the following conditions: |F1 / F|≥8; 4≤|F2 / F|≤200; When the number of lenses with optical power in the optical lens is less than or equal to four, the optical lens satisfies at least one of the following conditions: 1≤|F1 / F|≤4; 2≤|F2 / F|≤20.

21. The optical lens according to claim 1, characterized in that: The Abbe number Vd1 of the first plastic lens and the Abbe number Vd2 of the second plastic lens satisfy: Vd1 / Vd2≤3.

22. The optical lens according to claim 1, characterized in that: The air interval d12 between the first plastic lens and the second plastic lens on the optical axis and the center thickness d1 of the first plastic lens on the optical axis and the center thickness d2 of the second plastic lens on the optical axis satisfy: 0.5≤d12 / (d1+d2)≤5.

23. The optical lens according to claim 1, characterized in that: The center thickness d2 of the second plastic lens on the optical axis, the sag height SAG22 of the second side surface of the second plastic lens, and the sag height SAG21 of the first side surface of the second plastic lens satisfy: 0.85≤d2 / (d2+SAG22-SAG21)≤2.

24. An electronic device, characterized in that: comprising the optical lens according to any one of claims 1 to 23, and It also includes an imaging element for converting the optical image or optical information formed by the optical lens into an electrical signal, wherein the imaging element is located on the second side of the optical lens, and the light from the first side forms an image on the second side after passing through the optical lens; Alternatively, it further includes a light source, which is located on the second side of the optical lens, and the light emitted by the light source is projected to the first side of the optical lens after passing through the optical lens, forming an image or illuminating an area on the first side.

Images