pan shot

Abstract

The application discloses a panoramic lens, which comprises, in sequence from the object side to the imaging surface along the optical axis, a first lens with negative focal length, the object side of which is a convex surface and the image side of which is a concave surface; a second lens with negative focal length, the object side of which is a convex surface and the image side of which is a concave surface; a third lens with positive focal length, the object side of which is a concave surface or a convex surface and the image side of which is a convex surface; a diaphragm; a fourth lens with positive focal length, the object side and the image side of which are both convex surfaces; a fifth lens with negative focal length, the object side of which is a concave surface or a convex surface and the image side of which is a concave surface; a sixth lens with positive focal length, the object side of which is a convex surface and the image side of which is a convex surface or a concave surface; and a seventh lens with negative focal length, the object side of which is a convex surface near the optical axis and the image side of which is a concave surface near the optical axis. The panoramic lens has the advantages of small volume, low cost, high image quality and the like.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of imaging lenses, in particular to a panoramic lens. BACKGROUND

[0002] With the development of mobile Internet, plus the popularity of social, video, live software, people's love for photography is getting higher and higher, and the pursuit of imaging effect is more diversified, which requires not only high image quality, but also a large field of view to shoot a wide range of visual impact strong picture. At present, the unmanned aerial vehicle develops rapidly, and the corresponding requirements for the panoramic lens matched with it are also getting higher and higher.

[0003] Since the unmanned aerial vehicle is often used in complex environments such as severe vibration, high pressure and extreme temperature, the performance requirements of the matched panoramic lens are very high. It not only requires good thermal stability to adapt to the harsh outdoor environment, but also requires a light appearance and a small weight to increase the endurance time of the unmanned aerial vehicle in high-altitude flight shooting. At the same time, the lens is required to have a large aperture to meet the needs of the unmanned aerial vehicle to shoot clear and lively pictures in various environments such as day and night. At present, the conventional panoramic lens on the market is difficult to meet the diversified use requirements of the unmanned aerial vehicle. SUMMARY

[0004] Therefore, the purpose of the present application is to provide a panoramic lens which at least has the advantages of small size and high image quality, so as to meet the diversified use requirements of unmanned aerial vehicles, action cameras, security devices, smart phones and other fields.

[0005] The present application provides a panoramic lens, which comprises, in order from the object side to the imaging surface along the optical axis: a first lens with negative focal power, whose object side is convex and whose image side is concave; a second lens with negative focal power, whose object side is convex and whose image side is concave; a third lens with positive focal power, whose object side is concave or convex and whose image side is convex; a diaphragm; a fourth lens with positive focal power, whose object side and image side are both convex; a fifth lens with negative focal power, whose object side is concave or convex and whose image side is concave; a sixth lens with positive focal power, whose object side is convex and whose image side is convex or concave; and a seventh lens with negative focal power, whose object side is convex near the optical axis and whose image side is concave near the optical axis; wherein the panoramic lens satisfies the following condition formula: 5.5<IH / FNO<7.0; wherein IH represents the image height of the panoramic lens, and FNO represents the aperture number of the panoramic lens.

[0006] Compared with the prior art, the panoramic lens provided by the present application adopts the combination of seven lenses, and by reasonably setting the refractive power of each lens and the surface shape of each lens, and by reasonably setting the thickness of each lens and the distance between each lens, the total length and volume of the optical lens can be effectively reduced; in addition, by reasonably setting the position of the diaphragm, a larger range of light flux can enter the body to meet the imaging needs of bright and dark environments. BRIEF DESCRIPTION OF DRAWINGS

[0007] Figure 1 It is a structure schematic diagram of the panoramic lens of the first embodiment of the present application.

[0008] Figure 2 It is an MTF diagram of the panoramic lens of the first embodiment of the present application.

[0009] Figure 3 It is an F-Tanθ distortion curve diagram of the panoramic lens of the first embodiment of the present application.

[0010] Figure 4 It is a sagittal chromatic aberration curve diagram of the panoramic lens of the first embodiment of the present application.

[0011] Figure 5 It is a structure schematic diagram of the panoramic lens of the second embodiment of the present application.

[0012] Figure 6 It is an MTF diagram of the panoramic lens of the second embodiment of the present application.

[0013] Figure 7 It is an F-Tanθ distortion curve diagram of the panoramic lens of the second embodiment of the present application.

[0014] Figure 8 It is a sagittal chromatic aberration curve diagram of the panoramic lens of the second embodiment of the present application.

[0015] Figure 9 It is a structure schematic diagram of the panoramic lens of the third embodiment of the present application.

[0016] Figure 10 It is an MTF diagram of the panoramic lens of the third embodiment of the present application.

[0017] Figure 11 It is an F-Tanθ distortion curve diagram of the panoramic lens of the third embodiment of the present application.

[0018] Figure 12 It is a sagittal chromatic aberration curve diagram of the panoramic lens of the third embodiment of the present application. DETAILED DESCRIPTION

[0019] In order to make the objects, features and advantages of the present application more clear, the detailed description of the specific embodiments of the present application is made below with reference to the accompanying drawings. Several embodiments of the present application are given in the accompanying drawings. However, the present application can be realized in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the application herein is for describing the specific embodiments only and is not intended to be limiting of the application. Same reference numerals in the specification denote the same elements throughout.

[0021] The present application provides a panoramic lens, which comprises, along the optical axis from the object side to the imaging surface, a first lens, a second lens, a third lens, a diaphragm, a fourth lens, a fifth lens, a sixth lens, a seventh lens and a filter, and the optical centers of the lenses are located on the same line.

[0022] The first lens has negative focal power, the object side of the first lens is convex, and the image side of the first lens is concave; the second lens has negative focal power, the object side of the second lens is convex, and the image side of the second lens is concave; the third lens has positive focal power, the object side of the third lens is concave or convex, and the image side of the third lens is convex; the fourth lens has positive focal power, and the object side and the image side of the fourth lens are both convex; the fifth lens has negative focal power, the object side of the fifth lens is concave or convex, and the image side of the fifth lens is concave; the sixth lens has positive focal power, the object side of the sixth lens is convex, and the image side of the sixth lens is convex or concave; and the seventh lens has negative focal power, the object side of the seventh lens is convex near the optical axis, and the image side of the seventh lens is concave near the optical axis.

[0023] The diaphragm can be a light-shielding paper with a light passing hole in the center, and the light passing aperture of the diaphragm is smaller than the aperture of the baffle, so as to ensure that the light passing amount of the panoramic lens is determined by the light passing aperture of the diaphragm. The diaphragm is arranged between the third lens and the fourth lens, which can improve the field angle of the panoramic lens and better match the incident angle of the chip. At the same time, the light-shielding paper with a light passing hole in the center is used as the diaphragm, which can reduce the requirement for the light passing hole of the lens barrel, reduce the forming difficulty of the light passing hole of the lens barrel, improve the production rate, and reduce the production cost.

[0024] In some embodiments, in order to reduce the weight of the lens and lower the unit price of the lens, at least one plastic lens is included in the panoramic lens; in order to ensure the thermal stability of the lens, at least one glass lens is also included in the panoramic lens. Specifically, the panoramic lens is composed of five plastic lenses and two glass lenses. The use of the glass-plastic hybrid structure can greatly reduce the volume and weight of the lens, is suitable for mass production, and at the same time, ensures the stability of the imaging performance of the lens in high and low temperature environments to the greatest extent.

[0025] In some embodiments, in order to improve the resolving power of the lens and effectively reduce the axial chromatic aberration of the lens, the panoramic lens uses multiple aspheric lenses. The use of aspheric lenses can better correct the aberration of the lens, improve the resolution of the lens, and make the imaging clearer. Specifically, the first lens in the panoramic lens is a glass spherical lens, the fourth lens is a glass aspheric lens, and the second lens, the third lens, the fifth lens, the sixth lens and the seventh lens are all plastic aspheric lenses.

[0026] In some embodiments, the panoramic lens satisfies the following conditional formula:

[0027] 5.5<IH / FNO<7.0; (1)

[0028] wherein IH represents the image height of the panoramic lens, and FNO represents the aperture number of the panoramic lens. When the above conditional formula (1) is satisfied, the panoramic lens is beneficial to match a higher pixel chip and improve the image resolution on the premise of having a sufficient field of view; at the same time, the panoramic lens can have a light flux that matches the size of the imaging surface, thereby being beneficial to improve the imaging clarity.

[0029] In some embodiments, the panoramic lens satisfies the following conditional formula:

[0030] 0.5<f / SD ST <0.8; (2)

[0031] wherein f represents the effective focal length of the panoramic lens, and SD ST represents the entrance pupil diameter of the diaphragm. When the above conditional formula (2) is satisfied, the panoramic lens can have a large aperture characteristic, can have a sufficient light flux to meet the imaging needs of bright and dark environments under the condition of ensuring the imaging quality.

[0032] In some embodiments, the panoramic lens satisfies the following conditional formula:

[0033] -0.4<f1 / R1<-0.2; (3)

[0034] f1 / R1<0.5 (3)

[0035] In some embodiments, the panoramic lens satisfies the following conditional expression:

[0036] 4.5 < f3 / f < 6.5; (4)

[0037] -0.4 < f3 / (R5-R6) < 0.4; (5)

[0038] wherein f3 represents the effective focal length of the third lens, f represents the effective focal length of the panoramic lens, R5 represents the curvature radius of the object side of the third lens, and R6 represents the curvature radius of the image side of the third lens. When the conditional expressions (4) and (5) are satisfied, the surface shape of the third lens can be reasonably controlled, which is conducive to lens processing and forming, and also conducive to correcting aberration and further improving the imaging quality of the panoramic lens.

[0039] In some embodiments, the panoramic lens satisfies the following conditional expression:

[0040] 3.5 < SD1 / SD14 < 4.5; (6)

[0041] wherein SD1 represents the effective diameter of the object side of the first lens, and SD14 represents the effective diameter of the image side of the seventh lens. When the conditional expression (6) is satisfied, the overall size of the panoramic lens can be controlled, and good imaging effect can be ensured while maintaining miniaturization.

[0042] In some embodiments, the panoramic lens satisfies the following conditional expression:

[0043] 0.4 < R10 / R11 < 0.7; (7)

[0044] wherein R10 represents the curvature radius of the image side of the fifth lens, and R11 represents the curvature radius of the object side of the sixth lens. When the conditional expression (7) is satisfied, the light ray angle between the fifth lens and the sixth lens can be controlled, optical imaging ghosting can be reduced, and the imaging effect can be improved.

[0045] In some embodiments, the panoramic lens satisfies the following conditional expression:

[0046] 2.0 < CT4 / ET4 < 2.5; (8)

[0047] Wherein, CT4 represents the center thickness of the fourth lens, ET4 represents the edge thickness of the fourth lens. When the above condition formula (8) is satisfied, by controlling the ratio of the center thickness and the edge thickness of the fourth lens, it is beneficial to ensure the feasibility of glass lens processing, and make the lens structure more reasonable.

[0048] In some embodiments, the panoramic lens satisfies the following condition formula:

[0049] 22° < CRA < 32°; (9)

[0050] Wherein, CRA represents the chief ray exit angle of the panoramic lens. When the above condition formula (9) is satisfied, it is beneficial to make the imaging light ray exit angle of the panoramic lens better match the chip, and is beneficial to achieve high-resolution imaging effect.

[0051] In some embodiments, the panoramic lens satisfies the following condition formula:

[0052] 15 < (R1+R2+R3+R4) / f < 25; (10)

[0053] Wherein, R1 represents the curvature radius of the object side of the first lens, R2 represents the curvature radius of the image side of the first lens, R3 represents the curvature radius of the object side of the second lens, R4 represents the curvature radius of the image side of the second lens, and f represents the effective focal length of the panoramic lens. When the value of (R1+R2+R3+R4) / f exceeds the upper limit, the combined optical power of the first lens and the second lens is too strong, although the purpose of converging light rays quickly can be achieved, the total optical length of the system is reduced, but various aberrations generated are too large, which is difficult to correct, at the same time, the curvature of the lens is increased, the processing difficulty is increased, and the system error is increased. When the value of (R1+R2+R3+R4) / f exceeds the lower limit, the combined optical power of the first lens and the second lens is weakened, and the above various aberrations are relatively reduced, but the refractive ability is reduced, which leads to the increase of the total optical length of the system.

[0054] In some embodiments, the panoramic lens satisfies the following condition formula:

[0055] 0.5 < GT / TTL < 0.8; (11)

[0056] Wherein, GT represents the sum of the center thicknesses of all lenses of the panoramic lens, and TTL represents the total optical length of the panoramic lens. When the value of GT / TTL exceeds the lower limit, the lenses in the panoramic lens are too sparse, and the air thermal expansion and contraction at high and low temperatures will cause the relative position deviation of the lens assembly to be too large after being assembled, thereby causing the best image plane of the lens to deviate at high and low temperatures, and the resolution of the lens to decrease too quickly. When the value of GT / TTL exceeds the upper limit, the lenses in the panoramic lens are too compact, and the lenses cannot be well curved to correct aberrations, thereby the resolution of the lens cannot be improved.

[0057] In some embodiments, the panoramic lens satisfies the condition formula:

[0058] 0.3 < RS2 / SD2 < 0.5; (12)

[0059] wherein RS2 represents the sag of the image side surface of the first lens, and SD2 represents the effective diameter of the image side surface of the first lens. When the above condition formula (12) is satisfied, the first lens has a sufficient opening angle to meet the light requirement of the ultra-wide field of view.

[0060] In some embodiments, the panoramic lens satisfies the condition formula:

[0061] 5 < (CT5 + CT6) / AT56 < 20; (13)

[0062] wherein CT5 represents the center thickness of the fifth lens, CT6 represents the center thickness of the sixth lens, and AT56 represents the air spacing between the fifth lens and the sixth lens on the optical axis. When the above condition formula (13) is satisfied, by controlling the thickness and spacing of the fifth lens and the sixth lens, the lens group can be more compact, which is conducive to maintaining the miniaturization of the panoramic lens.

[0063] In some embodiments, the panoramic lens satisfies the condition formula:

[0064] 0 < |RS13 / SD13| < 0.1; (14)

[0065] wherein RS13 represents the sag of the object side surface of the seventh lens, and SD13 represents the effective diameter of the object side surface of the seventh lens. When the above condition formula (14) is satisfied, the incident angle of the peripheral field of view on the seventh lens can be effectively reduced, and excessive high-order aberrations can be avoided to improve the imaging performance.

[0066] In some embodiments, the panoramic lens satisfies the condition formula:

[0067] -8 < f2 / f < -3; (15)

[0068] 0.4 < AT12 / AT23 < 0.8; (16)

[0069] wherein f2 represents the effective focal length of the second lens, f represents the effective focal length of the panoramic lens, AT12 represents the air spacing between the first lens and the second lens on the optical axis, and AT23 represents the air spacing between the second lens and the third lens on the optical axis. When the above condition formulas (15) and (16) are satisfied, the effective focal length of the second lens and its position relative to the front and rear lenses can be adjusted to reduce the light deflection angle, thereby reducing the aberration of the subsequent lenses.

[0070] In some embodiments, the panoramic lens satisfies the following conditional expression:

[0071] 10 < TTL / f < 15; (17)

[0072] wherein TTL represents the total optical length of the panoramic lens, and f represents the effective focal length of the panoramic lens. By satisfying the above conditional expression (17), by limiting the relationship between the total optical length and the effective focal length, the optical length of the system can be effectively controlled while satisfying the ultra-wide field angle range, and miniaturization of the lens is achieved. When TTL / f > 15, the optical length of the system is too long, which is not conducive to miniaturization; when TTL / f < 10, the effective focal length of the system is too large, which is not conducive to satisfying the ultra-wide field angle range of the system, and sufficient object space information cannot be obtained.

[0073] The present application is further described in the following embodiments. In each embodiment, the thickness, the radius of curvature, and the material selection of each lens in the panoramic lens are different, and the specific differences can be referred to the parameter table of each embodiment. The following embodiments are only preferred embodiments of the present application, but the embodiments of the present application are not limited only to the following embodiments, and any changes, substitutions, combinations or simplifications made without departing from the innovative points of the present application should be regarded as equivalent replacement modes, and are included in the protection scope of the present application.

[0074] In each embodiment of the present application, when the lens in the panoramic lens is an aspherical lens, each aspherical surface satisfies the following equation:

[0075]

[0076] wherein z is the sag of the aspherical surface at a height of h along the optical axis, c is the paraxial curvature of the surface, Ai is the aspherical surface coefficient of the 2i-th order, and k is the conic coefficient. The above parameters can be used to accurately set the size of the aspherical surface of the front and rear surfaces of the lens, and the aspherical shape satisfies the even aspherical equation. By using different aspherical coefficients, the aspherical surface can be maximized in the system, and a more perfect resolving power is obtained. 2i

[0077] First embodiment

[0078] Please refer to Figure 1 is a structure schematic diagram of the panoramic lens 100 provided by the first embodiment of the present application, which sequentially includes a first lens L1, a second lens L2, a third lens L3, a stop ST, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, and a filter L8 along the optical axis from the object side to the imaging surface S17, and the optical centers of each lens are located on the same straight line.​

[0079] Specifically, the first lens L1 has negative focal power, the object side S1 of the first lens is a convex surface, and the image side S2 of the first lens is a concave surface; the second lens L2 has negative focal power, the object side S3 of the second lens is a convex surface, and the image side S4 of the second lens is a concave surface; the third lens L3 has positive focal power, the object side S5 of the third lens is a concave surface, and the image side S6 of the third lens is a convex surface; the fourth lens L4 has positive focal power, the object side S7 and the image side S8 of the fourth lens are both convex surfaces; the fifth lens L5 has negative focal power, the object side S9 and the image side S10 of the fifth lens are both concave surfaces; the sixth lens L6 has positive focal power, the object side S11 and the image side S12 of the sixth lens are both convex surfaces; the seventh lens L7 has negative focal power, the object side S13 of the seventh lens is a convex surface at the near optical axis, and the image side S14 of the seventh lens is a concave surface at the near optical axis; the object side of the filter L8 is S15, and the image side is S16. The first lens L1 is a glass spherical lens, the fourth lens L4 is a glass aspherical lens, and the second lens L2, the third lens L3, the fifth lens L5, the sixth lens L6, and the seventh lens L7 are all plastic aspherical lenses.

[0080] The related parameters of each lens of the panoramic lens 100 provided in the embodiment are shown in Table 1.

[0081] Table 1

[0082]

[0083]

[0084] The related parameters of the aspherical lenses of the panoramic lens 100 in the embodiment are shown in Table 2.

[0085] Table 2

[0086]

[0087] Please refer to Figure 2 , which is the MTF diagram of the panoramic lens 100 in the embodiment. As can be seen from the diagram, the MTF value of the lens is above 0.55 within 0.7 field of view at a spatial frequency of 200 lp / mm, indicating that the panoramic lens 100 has a high resolution.

[0088] Please refer to Figure 3 , which is the F-Tanθ distortion diagram of the panoramic lens 100 in the embodiment. As can be seen from the diagram, the F-Tanθ distortion of the lens is small and controlled within-6.5%, indicating that the distortion of the panoramic lens 100 is well corrected.

[0089] Please refer to Figure 4The figure shows the vertical axis chromatic aberration curve of the panoramic lens 100 in this embodiment. As can be seen from the figure, the offset of the vertical axis chromatic aberration is controlled within ±2.5um, indicating that the panoramic lens 100 can effectively control the vertical axis chromatic aberration.

[0090] Second Embodiment

[0091] Please see Figure 5 This is a schematic diagram of the structure of the panoramic lens 200 provided in the second embodiment of the present invention. The panoramic lens 200 in this embodiment is basically the same as the panoramic lens 100 in the first embodiment. The main difference is that the object side of the third lens is convex near the optical axis, the object side of the fifth lens is convex near the optical axis, and the image side of the sixth lens is concave near the optical axis.

[0092] The relevant parameters of each lens of the panoramic lens 200 in this embodiment are shown in Table 3.

[0093] Table 3

[0094]

[0095] The relevant parameters of the aspherical lens of the panoramic lens 200 in this embodiment are shown in Table 4.

[0096] Table 4

[0097]

[0098] Please see Figure 6 The image shows the MTF diagram of the panoramic lens 200 in this embodiment. At a spatial frequency of 200 lp / mm, the MTF value of the lens within a 0.7 field of view is above 0.45, indicating that the panoramic lens 200 has a high resolution.

[0099] Please see Figure 7 The figure shows the F-Tanθ distortion diagram of the panoramic lens 200 in this embodiment. As can be seen from the figure, the F-Tanθ distortion of the lens is small and controlled within -4%, indicating that the distortion of the panoramic lens 200 is well corrected.

[0100] Please see Figure 8 The figure shows the vertical axis chromatic aberration curve of the panoramic lens 200 in this embodiment. As can be seen from the figure, the offset of the vertical axis chromatic aberration is controlled within 4um, indicating that the panoramic lens 200 can effectively correct the vertical axis chromatic aberration.

[0101] Third Embodiment

[0102] Please see Figure 9This is a schematic diagram of the structure of the panoramic lens 300 provided in the third embodiment of the present invention. The panoramic lens 300 in this embodiment is basically the same as the panoramic lens 100 in the first embodiment, except that the curvature radius, thickness and air gap between each lens are different.

[0103] The relevant parameters of each lens of the panoramic lens 300 in this embodiment are shown in Table 5.

[0104] Table 5

[0105]

[0106] The relevant parameters of the aspherical lens of the panoramic lens 300 in this embodiment are shown in Table 6.

[0107] Table 6

[0108]

[0109]

[0110] Please see Figure 10 The image shows the MTF diagram of the panoramic lens 300 in this embodiment. At a spatial frequency of 200 lp / mm, the MTF value of the lens within a 0.7 field of view is above 0.5, indicating that the panoramic lens 300 has a high resolution.

[0111] Please see Figure 11 The figure shows the F-Tanθ distortion diagram of the panoramic lens 300 in this embodiment. As can be seen from the figure, the F-Tanθ distortion of the lens is small and controlled within -5.5%, indicating that the distortion of the panoramic lens 300 is well corrected.

[0112] Please see Figure 12 The figure shows the vertical axis chromatic aberration curve of the panoramic lens 300 in this embodiment. As can be seen from the figure, the offset of the vertical axis chromatic aberration is controlled within 4um, indicating that the panoramic lens 300 can effectively correct the vertical axis chromatic aberration.

[0113] Please refer to Table 7, which shows the optical characteristics of the panoramic lenses provided in the three embodiments above, including the total optical length (TTL), effective focal length (f), maximum field of view (FOV), image height (IH), and focal length of each lens. It also includes the relevant values ​​for each conditional expression in the above-mentioned conditional expressions.

[0114] Table 7

[0115]

[0116]

[0117] In conclusion, the panoramic lens provided by the present application adopts a glass-plastic hybrid collocation structure, in particular, two glass lenses and five plastic lenses are adopted at the specified position sequence, so that the lens has good imaging quality in high and low temperature environments, and the weight and volume of the lens are effectively reduced, and the processing cost is reduced; at the same time, due to the compact arrangement between the lenses, the length of the lens is effectively reduced, and the head of the lens is small, so that the lens has a small volume; in addition, due to the reasonable structure of the diaphragm and each lens of the lens, a larger range of light flux can enter the body, and the imaging demand of bright and dark environments can be met.

[0118] In the description of the present specification, the description referring to the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0119] The above-described embodiments only express several implementation manners of the present application, and the description is more specific and detailed, but it should not be understood as a limitation on the scope of the patent of the present application. It should be noted that, for ordinary skilled persons in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are all within the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. A panoramic lens, in total seven pieces of lenses, characterized in that, In order from the object side to the imaging plane along the optical axis, comprises successively: a first lens with negative refractive power, the object side surface of the first lens is convex, the image side surface of the first lens is concave; a second lens with negative refractive power, the object side surface of the second lens is convex, the image side surface of the second lens is concave; a third lens with positive refractive power, the image side surface of the third lens is convex; a diaphragm; a fourth lens with positive refractive power, both the object side surface and the image side surface of the fourth lens are convex; a fifth lens with negative refractive power, the image side surface of the fifth lens is concave; a sixth lens with positive refractive power, the object side surface of the sixth lens is convex; a seventh lens with negative refractive power, the object side surface of the seventh lens is convex at the near optical axis, and the image side surface of the seventh lens is concave at the near optical axis; wherein the panoramic lens satisfies the following conditional expressions: 5.5mm<IH / FNO<7.0mm; wherein IH represents the image height of the panoramic lens, and FNO represents the aperture number of the panoramic lens; 4.5<f3 / f<6.5; -0.4<f3 / (R5-R6)<0.4; wherein f3 represents the effective focal length of the third lens, f represents the effective focal length of the panoramic lens, R5 represents the radius of curvature of the object side surface of the third lens, and R6 represents the radius of curvature of the image side surface of the third lens.

2. The all-around lens according to claim 1, characterized in that, The panoramic lens satisfies the following conditional expressions: 0.5<f / SD ST <0.8; where f represents the effective focal length of the panoramic lens, SD ST represents the entrance pupil diameter of the optical stop.

3. The all-around lens according to claim 1, characterized by, The panoramic lens satisfies the following conditional expressions: -0.4<f1 / R1<-0.2; wherein f1 represents the effective focal length of the first lens, and R1 represents the radius of curvature of the object side surface of the first lens.

4. The all-around lens according to claim 1, characterized by, The panoramic lens satisfies the following conditional expressions: 10<TTL / f<15; wherein TTL represents the total optical length of the panoramic lens, and f represents the effective focal length of the panoramic lens.

5. The all-around lens according to claim 1, characterized by, The panoramic lens satisfies the following conditional expressions: 3.5<SD1 / SD14<4.5; wherein SD1 represents the effective diameter of the object side surface of the first lens, and SD14 represents the effective diameter of the image side surface of the seventh lens.

6. The all-around lens according to claim 1, characterized by, The panoramic lens satisfies the following conditional expressions: 0.4<R10 / R11<0.7; wherein R10 represents the radius of curvature of the image side surface of the fifth lens, and R11 represents the radius of curvature of the object side surface of the sixth lens.

7. The all-around lens according to claim 1, characterized in that, The panoramic lens satisfies the following conditional expressions: 2.0<CT4 / ET4<2.5; wherein CT4 represents the center thickness of the fourth lens, and ET4 represents the edge thickness of the fourth lens.

8. The all-around lens according to claim 1, characterized by, The panoramic lens satisfies the following conditional expressions: 22°<CRA<32°; wherein CRA represents the chief ray exit angle of the panoramic lens.

9. The all-around lens according to claim 1, characterized in that, The panoramic lens satisfies the following conditional expressions: 15<(R1+R2+R3+R4) / f<25; wherein R1 represents the radius of curvature of the object side surface of the first lens, R2 represents the radius of curvature of the image side surface of the first lens, R3 represents the radius of curvature of the object side surface of the second lens, R4 represents the radius of curvature of the image side surface of the second lens, and f represents the effective focal length of the panoramic lens.

10. The all-around lens according to claim 1, characterized in that, The panoramic lens satisfies the following conditional expressions: 0.5<GT / TTL<0.8; GT represents the sum of the center thicknesses of all the lenses of the panoramic lens, and TTL represents the total optical length of the panoramic lens. GT represents the sum of the center thicknesses of all the lenses of the panoramic lens, and TTL represents the total optical length of the panoramic lens. GT represents the sum of the center thicknesses of all the

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