Optical lens, camera module and terminal device

Abstract

The application discloses an optical lens, a camera module and a terminal device. The optical lens comprises six lenses with refractive power. The first lens has positive refractive power. The object side surface and the image side surface of the first lens are a convex surface and a concave surface respectively. The second lens has negative refractive power. The object side surface and the image side surface of the second lens are both concave surfaces. The object side surface and the image side surface of the third lens are a concave surface and a convex surface respectively. The fourth lens has positive refractive power. The object side surface and the image side surface of the fourth lens are both convex surfaces. The fifth lens has positive refractive power. The object side surface of the fifth lens is a convex surface. The sixth lens has negative refractive power. The object side surface and the image side surface of the sixth lens are both concave surfaces. The optical lens satisfies the following relationship: 15deg < HFOV < 20deg, FNO < 2.1. The optical lens, the camera module and the terminal device can meet the design requirement of miniaturization and make the optical lens have good imaging quality.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of optical imaging technology, and in particular to an optical lens, a camera module and a terminal device. BACKGROUND

[0002] With the rapid development of advanced driver assistance systems, optical lenses have a more extensive application and development. For example, optical lenses with long focal length are required in long-distance imaging such as vehicle recorders, automatic parking, front vehicle collision warning, lane departure warning, pedestrian detection warning, etc. However, long focal length results in long total length of the optical lens, which is not conducive to the miniaturization of the lens. At the same time, such optical lenses require a larger aperture to have good imaging quality in the night or in a weak light environment. Therefore, it is necessary to develop optical lenses with miniaturization characteristics and good imaging quality in weak light and harsh environments. SUMMARY

[0003] Embodiments of the present application disclose an optical lens, a camera module and a terminal device, which can meet the design requirements of miniaturization while having good imaging quality.

[0004] To achieve the above-mentioned purpose, in a first aspect, the present application discloses an optical lens, which has a total of six lenses with refractive power, including a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens arranged in order along the optical axis from the object side to the image side.

[0005] The first lens has positive refractive power, and the object side surface of the first lens is convex at the near optical axis, and the image side surface of the first lens is concave at the near optical axis.

[0006] The second lens has negative refractive power, and the object side surface and the image side surface of the second lens are concave at the near optical axis.

[0007] The third lens has refractive power, and the object side surface of the third lens is concave at the near optical axis, and the image side surface of the third lens is convex at the near optical axis.

[0008] The fourth lens has positive refractive power, and the object side surface and the image side surface of the fourth lens are convex at the near optical axis.

[0009] The fifth lens has positive refractive power, and the object side surface of the fifth lens is convex at the near optical axis.

[0010] The sixth lens has negative refractive power, and the object side surface and the image side surface of the sixth lens are concave at the near optical axis.

[0011] The optical lens satisfies the following relationship:

[0012] 15deg<HFOV<20deg, FNO<2.1;

[0013] HFOV is half of the maximum field of view angle of the optical lens, and FNO is the aperture number of the optical lens.

[0014] In the optical lens provided in the present application, in order to meet the design requirement of miniaturization while making the optical lens have good imaging quality, the first lens is arranged to have positive refractive power, and the object side surface and the image side surface thereof are respectively arranged as convex surface and concave surface near the optical axis, which can make the first lens receive more object side light, expand the field of view angle range, effectively increase the field of view angle, improve the relative luminance of the edge field of view of the optical lens, and effectively avoid the occurrence of dark corners; the second lens has negative refractive power, and the object side surface and the image side surface thereof are both arranged as concave surface near the optical axis, which is beneficial to further collect light, so that as many large-angle light as possible enters the optical lens, and the luminance of the optical lens is effectively improved; the object side surface and the image side surface of the third lens are respectively arranged as concave surface and convex surface near the optical axis, which can make the light enter the optical lens more gently; the fourth lens has positive refractive power, and the object side surface and the image side surface thereof are both arranged as convex surface near the optical axis, which is beneficial to lift the light, balance aberration, and meet the requirement of the image surface; the fifth lens has positive refractive power, and the object side surface thereof is arranged as convex surface near the optical axis, which can compress the light collected in front, thereby reducing the aperture of the rear lens, is beneficial to reduce the total length of the optical lens, and is beneficial to reduce the chief ray angle, so that the optical lens also has good imaging quality in the environment with weak light or at night; the sixth lens has negative refractive power, and the object side surface and the image side surface thereof are both arranged as concave surface near the optical axis, which can correct the off-axis spherical aberration and dispersion of the optical lens, thereby improving the optical imaging quality.

[0015] The optical lens satisfies the relationship 15deg<HFOV<20deg, by reasonably setting the value of half of the maximum field of view angle of the optical lens, the long focal function of the optical lens can be realized without causing the total length of the optical lens to be too long, which is beneficial to realize the miniaturization of the optical lens.

[0016] The optical lens satisfies the relationship FNO<2.1, by constraining the aperture number of the optical lens, the large aperture required by the optical lens can be met, the light amount is improved, the optical lens also has good imaging quality in the environment with weak light or at night, and the requirement of long-distance imaging is further met.

[0017] As an optional implementation, in the embodiment of the first aspect of the present application, the optical lens satisfies the following relationship:

[0018] 5.5 < TTL / IMGH < 7, and / or, 1.7 < TTL / F < 1.9, and / or, 3 < F / IMGH < 4;

[0019] wherein TTL is the distance from the object side surface of the first lens to the image plane of the optical lens on the optical axis, i.e. the total length of the optical lens, IMGH is half of the image height corresponding to the maximum field angle of the optical lens, and F is the focal length of the optical lens.

[0020] As an optional implementation, in the embodiment of the first aspect of the present application, the optical lens satisfies the following relationship:

[0021] |F12 / F| < 20, and / or, |F56 / F| < 30, and / or, -2 < F1 / F6 < -1.1;

[0022] wherein F12 is the combined focal length of the first lens and the second lens, F56 is the combined focal length of the fifth lens and the sixth lens, F1 is the focal length of the first lens, and F6 is the focal length of the sixth lens.

[0023] As an optional implementation, in the embodiment of the first aspect of the present application, the optical lens satisfies the following relationship:

[0024] 0.5 < F5 / F < 3, and / or, 3 < F5 / CT5 < 20, and / or, 1 < CT5 / ET5 < 3;

[0025] wherein F5 is the focal length of the fifth lens, CT5 is the thickness of the fifth lens on the optical axis, and ET5 is the distance from the maximum effective aperture on the object side surface of the fifth lens to the maximum effective aperture on the image side surface of the fifth lens in the direction of the optical axis, i.e. the edge thickness of the fifth lens.

[0026] As an optional implementation, in the embodiment of the first aspect of the present application, the optical lens satisfies the following relationship:

[0027] 1.1 < SD8 / SD5 < 1.3, and / or, 1.1 < CT2 / SAG4 < 2.1, and / or, 1.1 < ET6 / CT6 < 1.25;

[0028] SD5 is half of the maximum effective aperture of the object side surface of the third lens, SD8 is half of the maximum effective aperture of the image side surface of the fourth lens, CT2 is the thickness of the second lens on the optical axis, SAG4 is the distance from the intersection of the image side surface of the second lens and the optical axis to the maximum effective aperture of the image side surface of the second lens on the optical axis, i.e. the sag of the maximum effective half aperture of the image side surface of the second lens, CT6 is the thickness of the sixth lens on the optical axis, and ET6 is the distance from the maximum effective aperture of the object side surface of the sixth lens to the maximum effective aperture of the image side surface of the sixth lens in the direction of the optical axis, i.e. the edge thickness of the sixth lens.

[0029] As an optional implementation, in the embodiment of the first aspect of the present application, the optical lens satisfies the following relationship:

[0030] 5 < CT MAX / CT MIN < 7.5, and / or, 1.5 < CT6 / CT1 < 2;

[0031] CT MAX is the maximum thickness of the first lens to the sixth lens on the optical axis, CT MIN is the minimum thickness of the first lens to the sixth lens on the optical axis, CT1 is the thickness of the first lens on the optical axis, and CT6 is the thickness of the sixth lens on the optical axis.

[0032] As an optional implementation, in the embodiment of the first aspect of the present application, the optical lens satisfies the following relationship:

[0033] -5 < R8 / R7 < 0, and / or, -25 < SD8 / SAG8 < -5;

[0034] R7 is the radius of curvature of the object side surface of the fourth lens at the optical axis, R8 is the radius of curvature of the image side surface of the fourth lens at the optical axis, SD8 is half of the maximum effective aperture of the image side surface of the fourth lens, and SAG8 is the distance from the intersection of the image side surface of the fourth lens and the optical axis to the maximum effective aperture of the image side surface of the fourth lens on the optical axis, i.e. the sag of the maximum effective half aperture of the image side surface of the fourth lens.

[0035] As an optional implementation, in the embodiment of the first aspect of the present application, the optical lens satisfies the following relationship:

[0036] 7.5 deg < HFOV / FNO < 9.5 deg, and / or, 1 < |SAG9 / SAG10| < 4, and / or, 1.45 < CT1 / ET1 < 1.7;

[0037] SAG9 is the distance from the intersection of the object side surface of the fifth lens and the optical axis to the maximum effective aperture of the object side surface of the fifth lens on the optical axis, that is, the sag of the maximum effective half aperture of the object side surface of the fifth lens, SAG10 is the distance from the intersection of the image side surface of the fifth lens and the optical axis to the maximum effective aperture of the image side surface of the fifth lens on the optical axis, that is, the sag of the maximum effective half aperture of the image side surface of the fifth lens, CT1 is the thickness of the first lens on the optical axis, and ET1 is the distance from the maximum effective aperture of the object side surface of the first lens to the maximum effective aperture of the image side surface of the first lens in the direction of the optical axis, that is, the edge thickness of the first lens.

[0038] In a second aspect, the present application discloses a camera module, which comprises an image sensor and the optical lens according to the first aspect.

[0039] In a third aspect, the present application further discloses a terminal device, which comprises a housing and the camera module according to the second aspect.

[0040] Compared with the prior art, the present application has the following beneficial effects:

[0041] In the optical lens provided by the present application, in order to meet the design requirement of miniaturization while making the optical lens have good imaging quality, the first lens is arranged to have positive refractive power, and the object side surface and the image side surface thereof are respectively designed as convex and concave near the optical axis, so that the first lens can receive more object side light, expand the field of view angle range, effectively increase the field of view angle, improve the relative luminance of the edge field of view of the optical lens, and effectively avoid the occurrence of dark corners; the second lens has negative refractive power, and the object side surface and the image side surface thereof are both designed as concave near the optical axis, which is beneficial to further collect light, so that as many large-angle light as possible enters the optical lens, and the luminance of the optical lens is effectively improved; the object side surface and the image side surface of the third lens are respectively designed as concave and convex near the optical axis, so that the light enters the optical lens more gently; the fourth lens has positive refractive power, and the object side surface and the image side surface thereof are both designed as convex near the optical axis, which is beneficial to lifting the light and balancing the aberration, and meets the requirement of the image surface; the fifth lens has positive refractive power, and the object side surface thereof is designed as convex near the optical axis, which can compress the light collected in front, thereby reducing the aperture of the rear lens, is beneficial to reducing the total length of the optical lens, and is also beneficial to reducing the chief ray angle, so that the optical lens also has good imaging quality in the night or in an environment with relatively weak light; the sixth lens has negative refractive power, and the object side surface and the image side surface thereof are both designed as concave near the optical axis, which can correct the off-axis spherical aberration and dispersion of the optical lens, thereby improving the optical imaging quality.

[0042] The optical lens satisfies a relationship 15deg < HFOV < 20deg, by reasonably setting a value of half of a maximum field of view angle of the optical lens, so that the optical lens is in a reasonable range, the long-focus function of the optical lens can be realized, and the total length of the optical lens is not too long, which is beneficial to realize the miniaturization of the optical lens.

[0043] The optical lens satisfies a relationship FNO < 2.1, by constraining the aperture number of the optical lens, the large aperture required by the optical lens can be met, the light amount is improved, the optical lens has good imaging quality in the night or in the environment with weak light, and the long-distance imaging requirement is further met. BRIEF DESCRIPTION OF DRAWINGS

[0044] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiments will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0045] Figure 1 is a structural schematic diagram of the optical lens disclosed in Embodiment 1 of the present application;

[0046] Figure 2 is a spherical aberration diagram (mm), a coma diagram (mm) and a distortion diagram (%) of the optical lens disclosed in Embodiment 1 of the present application;

[0047] Figure 3 is a structural schematic diagram of the optical lens disclosed in Embodiment 2 of the present application;

[0048] Figure 4 is a spherical aberration diagram (mm), a coma diagram (mm) and a distortion diagram (%) of the optical lens disclosed in Embodiment 2 of the present application;

[0049] Figure 5 is a structural schematic diagram of the optical lens disclosed in Embodiment 3 of the present application;

[0050] Figure 6 is a spherical aberration diagram (mm), a coma diagram (mm) and a distortion diagram (%) of the optical lens disclosed in Embodiment 3 of the present application;

[0051] Figure 7 is a structural schematic diagram of the optical lens disclosed in Embodiment 4 of the present application;

[0052] Figure 8 is a spherical aberration diagram (mm), a coma diagram (mm) and a distortion diagram (%) of the optical lens disclosed in Embodiment 4 of the present application;

[0053] Figure 9 is a structural schematic diagram of the optical lens disclosed in Embodiment 5 of the present application;

[0054] Figure 10 is a spherical aberration diagram (mm), a coma diagram (mm) and a distortion diagram (%) of the optical lens disclosed by Embodiment 5 of the present application;

[0055] Figure 11 is a structural schematic diagram of the optical lens disclosed by Embodiment 6 of the present application;

[0056] Figure 12 is a spherical aberration diagram (mm), a coma diagram (mm) and a distortion diagram (%) of the optical lens disclosed by Embodiment 6 of the present application;

[0057] Figure 13 is a structural schematic diagram of the optical lens disclosed by Embodiment 7 of the present application;

[0058] Figure 14 is a spherical aberration diagram (mm), a coma diagram (mm) and a distortion diagram (%) of the optical lens disclosed by Embodiment 7 of the present application;

[0059] Figure 15 is a structural schematic diagram of the camera module disclosed by the present application;

[0060] Figure 16 is a structural schematic diagram of the terminal device as a car. DETAILED DESCRIPTION

[0061] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0062] In the present application, the positions or location relationships indicated by the terms “inner”, “outer” and the like are based on the positions or location relationships shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific position, or to be constructed and operated in a specific position.

[0063] In addition, in addition to indicating the position or location relationship, the above-mentioned part of the terms can also be used to indicate other meanings, for example, the term “upper” can also be used to indicate a certain dependent relationship or connection relationship in some cases. Those of ordinary skill in the art can understand the specific meaning of these terms in the present application according to the specific situation.

[0064] In addition, the terms "provided with", "connected" should be broadly understood. For example, it can be fixed connection, detachable connection, or integral structure; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, or internal communication between two devices, elements or components. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0065] In addition, the terms "first", "second" and the like are mainly used to distinguish different devices, elements or components (the specific type and structure may be the same or different), and are not intended to indicate or imply the relative importance and quantity of the indicated devices, elements or components. Unless otherwise stated, the meaning of "multiple" is two or more.

[0066] The technical solutions of the present application will be further described below in conjunction with the embodiments and drawings.

[0067] Please refer to Figure 1 , the application discloses an optical lens 100, which comprises a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6 and a seventh lens L7 arranged in sequence along the optical axis from the object side to the image side. Among them, the first lens L1 has positive refractive power, the second lens L2 has negative refractive power, the third lens L3 has positive refractive power or negative refractive power, the fourth lens L4 has positive refractive power, the fifth lens L5 has positive refractive power, and the sixth lens L6 has negative refractive power. When imaging, light rays enter the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5 and the sixth lens L6 in sequence from the object side of the first lens L1, and finally image on the imaging surface 101 of the optical lens 100.

[0068] Further, the object side surface 11 of the first lens L1 is convex at the near optical axis, and the image side surface 12 of the first lens L1 is concave at the near optical axis; the object side surface 21 and the image side surface 22 of the second lens L2 are concave at the near optical axis; the object side surface 31 of the third lens L3 is concave at the near optical axis, and the image side surface 32 of the third lens L3 is convex at the near optical axis; the object side surface 41 and the image side surface 42 of the fourth lens L4 are convex at the near optical axis; the object side surface 51 of the fifth lens L5 is convex at the near optical axis, and the image side surface 52 of the fifth lens L5 is convex or concave at the near optical axis; the object side surface 61 and the image side surface 62 of the sixth lens L6 are concave at the near optical axis.

[0069] In the optical lens 100 provided in the application, in order to meet the design requirement of miniaturization while making the optical lens 100 have good imaging quality, the first lens L1 is arranged to have positive refractive power, and the object side surface and the image side surface thereof are respectively designed as convex surface and concave surface at the vicinity of the optical axis, so that the first lens L1 can receive more light rays on the object side, expand the field angle range, effectively increase the field angle, improve the relative luminance of the edge field of view of the optical lens 100, and effectively avoid the occurrence of dark corners.

[0070] The second lens L2 has negative refractive power, and the object side surface and the image side surface thereof are both designed as concave surface at the vicinity of the optical axis, which is beneficial to further collect light rays, so that as many large-angle light rays as possible enter the optical lens 100, and the illumination of the optical lens 100 is effectively improved.

[0071] The object side surface and the image side surface of the third lens L3 are respectively designed as concave surface and convex surface at the vicinity of the optical axis, so that the light rays enter the optical lens 100 more gently.

[0072] The fourth lens L4 has positive refractive power, and the object side surface and the image side surface thereof are both designed as convex surface at the vicinity of the optical axis, which is beneficial to lift the light rays, balance the aberration, and meet the requirement of the image surface.

[0073] The fifth lens L5 has positive refractive power, and the object side surface thereof is designed as convex surface at the vicinity of the optical axis, which can compress the light rays collected in front, thereby reducing the aperture of the rear lens, is beneficial to reduce the total length of the optical lens 100, and is beneficial to reduce the chief ray angle, so that the optical lens 100 also has good imaging quality in the night or in the environment with weak light.

[0074] The sixth lens L6 has negative refractive power, and the object side surface and the image side surface thereof are both designed as concave surface at the vicinity of the optical axis, which can correct the off-axis spherical aberration and dispersion of the optical lens 100, thereby improving the optical imaging quality.

[0075] Optionally, all the lenses in the optical lens 100 can be made of glass, or all the lenses can be made of plastic, or part of the lenses are made of glass and part of the lenses are made of plastic. Preferably, all the lenses in the optical lens 100 are made of glass, and the lenses made of glass can inhibit the shift of the back focus of the optical lens 100 caused by temperature change, so as to improve the stability of the optical lens 100. At the same time, the use of glass material can avoid the imaging blur of the optical lens 100 caused by the high and low temperature change in the use environment, and affect the normal use of the optical lens 100.

[0076] Optionally, all the lenses in the optical lens 100 can be spherical lenses, and the design of the spherical surface can reduce the preparation difficulty of the lenses and the processing cost of the lenses.

[0077] In some embodiments, the optical lens 100 can further include a diaphragm 102, which can be an aperture diaphragm and / or a field diaphragm, and which can be disposed between the image side 22 of the second lens L2 and the object side 31 of the third lens L3 of the optical lens 100. Of course, in other embodiments, the diaphragm 102 can also be disposed between other lenses, and the arrangement can be adjusted according to actual conditions, and the present embodiment is not limited in this regard.

[0078] In some embodiments, the optical lens 100 can further include a filter 110, which can be disposed between the image side 62 of the sixth lens L6 and the imaging surface 101 of the optical lens 100. Of course, in other embodiments, the filter 110 can also be disposed between other lenses, and the arrangement can be adjusted according to actual conditions, and the present embodiment is not limited in this regard. In the present embodiment, the filter 110 can be an infrared cut-off filter, so that light of other wavebands such as infrared light can be filtered out, and only visible light can pass through, so that the imaging is more in line with the visual experience of the human eye. Of course, the filter 110 can also be an infrared bandpass filter, so that light of other wavebands such as visible light can be filtered out, and only infrared light can pass through. By filtering out light of other wavebands such as visible light, the imaging quality is improved, and the optical lens 100 can be used as an infrared optical lens 100, i.e., the optical lens 100 can image and obtain a better image effect in a dim environment and other special application scenarios. Preferably, the filter 110 can be made of glass, and of course in other embodiments, the filter 110 can also be made of optical glass coating or other materials, and can be selected according to actual needs, and the present embodiment is not limited in this regard.

[0079] In some embodiments, the optical lens 100 further includes a protective glass 120, which is disposed between the filter 110 and the imaging surface 101, so as to be close to the image sensor during subsequent assembly, thereby playing a protective role.

[0080] In an embodiment, the optical lens 100 satisfies the relationship 15 deg < HFOV < 20 deg, where HFOV is half of the maximum field of view angle of the optical lens 100. By reasonably setting the value of half of the maximum field of view angle of the optical lens 100 to be within a reasonable range, the long focal function of the optical lens 100 can be achieved without causing the total length of the optical lens 100 to be too long, which is conducive to the miniaturization of the optical lens 100.

[0081] In an embodiment, the optical lens 100 satisfies a relationship FNO < 2.1, where FNO is the F-number of the optical lens 100. By restricting the F-number of the optical lens 100, a large aperture required by the optical lens 100 can be satisfied, the light amount is improved, and the optical lens 100 has good imaging quality in a night or a weak light environment, further satisfying the requirement of long-distance imaging.

[0082] In an embodiment, the optical lens 100 satisfies a relationship 7.5 deg < HFOV / FNO < 9.5 deg. By controlling the ratio between half of the maximum field of view angle of the optical lens 100 and the F-number of the optical lens 100, a reasonable focal length and F-number of the optical lens 100 are provided, so that the optical lens 100 has a long-focus function while having good imaging quality in a night or a weak light environment.

[0083] In an embodiment, the optical lens 100 satisfies a relationship 5.5 < TTL / IMGH < 7, where TTL is the distance from the object side 11 of the first lens L1 to the imaging surface 101 of the optical lens 100 on the optical axis, and IMGH is half of the image height corresponding to the maximum field of view angle of the optical lens 100. By controlling the ratio between the total length of the optical lens 100 and the half image height of the optical lens 100, the total length of the optical lens 100 is controlled, and the miniaturization design of the optical lens 100 is facilitated.

[0084] In an embodiment, the optical lens 100 satisfies a relationship 1.7 < TTL / F < 1.9, where F is the focal length of the optical lens 100. By reasonably controlling the ratio between the total length of the optical lens 100 and the focal length of the optical lens 100 within a reasonable range, the focal length of the optical lens 100 is long, and the total length of the optical lens 100 is not long, so that the optical lens 100 has a long-focus characteristic and meets the design requirement of miniaturization.

[0085] In an embodiment, the optical lens 100 further satisfies a relationship 3 < F / IMGH < 4. By reasonably configuring the ratio between the focal length of the optical lens 100 and the half image height, the optical lens 100 has a long-focus function while meeting the requirement of high-definition imaging. When the optical lens 100 exceeds the upper limit of the above relationship, the focal length of the optical lens 100 is too long, which is not conducive to the miniaturization of the optical lens 100; when the optical lens 100 is lower than the lower limit of the above relationship, the focal length of the optical lens 100 is too short, which is not conducive to the long-focus function of the optical lens 100.

[0086] In an embodiment, the optical lens 100 satisfies a relationship of |F12 / F|<20, where F12 is a combined focal length of the first lens L1 and the second lens L2. When the above relationship is satisfied, by reasonably controlling the ratio between the combined focal length of the combined lens (i.e., the combined lens composed of the first lens L1 and the second lens L2) and the focal length of the optical lens pair, the miniaturization of the optical lens 100 is facilitated, and the optical lens 100 has a suitable refractive power to sufficiently contract light into the stop 102, so as to avoid introducing excessive aberration when a large-angle light is incident into the optical lens 100, thereby facilitating the improvement of the imaging quality of the optical lens 100.

[0087] In an embodiment, the optical lens 100 satisfies a relationship of |F56 / F|<30, where F56 is a combined focal length of the fifth lens L5 and the sixth lens L6. By controlling the ratio between the combined focal length of the fifth lens L5 and the sixth lens L6 and the focal length of the optical lens 100 to satisfy the above relationship, the refractive power of the combined lens composed of the fifth lens L5 and the sixth lens L6 can be reasonably controlled, and the chromatic aberration and the aberration of the optical lens can be effectively corrected, thereby improving the imaging resolution.

[0088] In an embodiment, the optical lens 100 satisfies a relationship of -2<F1 / F6<-1.1, where F1 is the focal length of the first lens L1, and F6 is the focal length of the sixth lens L6. The optical lens 100 configured by the above relationship can achieve a more reasonable refractive power distribution, which is helpful for realizing the long-focus characteristic of the optical lens 100, and can improve the convergence ability of the optical lens 100 to light, adjust the light focusing position, and shorten the total length of the optical lens 100.

[0089] In an embodiment, the optical lens 100 satisfies a relationship of 3<F5 / CT5<20, where F5 is the focal length of the fifth lens L5, and CT5 is the thickness of the fifth lens L5 on the optical axis. By reasonably distributing the ratio between the focal length of the fifth lens L5 and the thickness of the fifth lens L5 on the optical axis, the optical lens 100 can satisfy the long-focus characteristic and have a good ability to balance aberration, and the main light deflection angle can also be reasonably controlled, which is conducive to adjusting the structure of the optical lens 100.

[0090] In an embodiment, the optical lens 100 satisfies a relationship 1.45 < CT1 / ET1 < 1.7, ET1 is a distance from a maximum effective aperture of the object side 11 of the first lens L1 to a maximum effective aperture of the image side 12 of the first lens L1 in the direction of the optical axis. By reasonably controlling the thickness of the first lens L1 on the optical axis and the edge thickness of the first lens L1, the thickness-to-thickness ratio of the first lens L1 can be reasonably controlled, thereby optimizing the face type bending freedom of the first lens L1, thereby facilitating the effective convergence of large-angle incident light, and the light passing through the first lens L1 has a smaller deflection angle, thereby reducing the generation of stray light, thereby ensuring good imaging performance. At the same time, reasonable face type changes can optimize the processing technology of the lens and reduce the design and assembly sensitivity of the first lens L1.

[0091] In an embodiment, the optical lens 100 satisfies a relationship 1 < CT5 / ET5 < 3, ET5 is a distance from a maximum effective aperture of the object side 51 of the fifth lens L5 to a maximum effective aperture of the image side 52 of the fifth lens L5 in the direction of the optical axis. Reasonably controlling the thickness of the fifth lens L5 on the optical axis and the edge thickness of the fifth lens L5 can effectively reduce the size of the optical lens 100 and satisfy the long-focus characteristics of the optical lens 100; at the same time, it is also beneficial to adjust the structure of the optical lens 100 and reduce the processing and assembly difficulty of the lens.

[0092] In an embodiment, the optical lens 100 satisfies a relationship 1.1 < ET6 / CT6 < 1.25, CT6 is the thickness of the sixth lens L6 on the optical axis, and ET6 is a distance from a maximum effective aperture of the object side 61 of the sixth lens L6 to a maximum effective aperture of the image side 62 of the sixth lens L6 in the direction of the optical axis. By reasonably controlling the edge thickness of the sixth lens L6 and the thickness of the sixth lens L6 on the optical axis, the volume distribution of the sixth lens L6 can be made uniform, which is beneficial to the processing and forming of the sixth lens L6, reduces the production difficulty of the sixth lens L6, and at the same time makes the sixth lens L6 not produce too much aberration.

[0093] In an embodiment, the optical lens 100 satisfies a relationship 1.1 < SD8 / SD5 < 1.3, wherein SD5 is half of the maximum effective aperture of the object side 31 of the third lens L3, and SD8 is half of the maximum effective aperture of the image side 42 of the fourth lens L4. By controlling the ratio of half of the maximum effective apertures of the image side 42 of the fourth lens L4 and the object side 31 of the third lens L3, the transition of light between the third lens L3 and the fourth lens L4 can be smooth while reducing the design difficulty of the lens structure.

[0094] In an embodiment, the optical lens 100 satisfies a relationship 1.1 < CT2 / SAG4 < 2.1, CT2 is a thickness of the second lens L2 on the optical axis, and SAG4 is a distance from an intersection of the image side surface 22 of the second lens L2 and the optical axis to a maximum effective aperture of the image side surface 22 of the second lens L2 on the optical axis. Satisfying the above relationship can help avoid large-angle turning of light passing through the second lens L2, reduce tolerance sensitivity, and avoid the occurrence of serious ghost images.

[0095] In an embodiment, the optical lens 100 satisfies a relationship 5 < CT MAX / CT MIN <7.5, where CT MAX is a maximum thickness of the first lens L1 to the sixth lens L6 on the optical axis, and CT MIN is a minimum thickness of the first lens L1 to the sixth lens L6 on the optical axis. By reasonably setting the relationship between CT MAX and CT MIN , the thickness distribution of the lenses can be more uniform, thereby helping to improve the spatial layout and processability of the optical lens 100.

[0096] In an embodiment, the optical lens 100 satisfies a relationship 1.5 < CT6 / CT1 < 2, CT1 is a thickness of the first lens L1 on the optical axis, and a reasonable distribution of the ratio of the thickness of the sixth lens L6 and the first lens L1 on the optical axis can effectively reduce the size of the optical lens 100 to avoid the volume of the optical lens 100 being too large, and also reduce the assembly difficulty of the lenses and achieve a higher space utilization rate.

[0097] In an embodiment, the optical lens 100 satisfies a relationship -25 < SD8 / SAG8 < -5, SAG8 is a distance from an intersection of the image side surface 42 of the fourth lens L4 and the optical axis to a maximum effective aperture of the image side surface 42 of the fourth lens L4 on the optical axis. By controlling the ratio of the maximum effective half aperture and the sag of the image side surface 42 of the fourth lens L4, the trend of the edge region of the surface of the fourth lens L4 can be controlled to be smooth, and the deflection angle of the edge light is reduced.

[0098] In an embodiment, the optical lens 100 satisfies a relationship 1 < |SAG9 / SAG10| < 4, SAG9 is a distance from an intersection of the object side surface 51 of the fifth lens L5 and the optical axis to a maximum effective aperture of the object side surface 51 of the fifth lens L5 on the optical axis, and SAG10 is a distance from an intersection of the image side surface 52 of the fifth lens L5 and the optical axis to a maximum effective aperture of the image side surface 52 of the fifth lens L5 on the optical axis. This helps the fifth lens L5 to collect light, smoothly transition to the rear, and effectively reduce the aberration of the optical lens 100 and improve the imaging quality of the optical lens 100.

[0099] In an embodiment, the optical lens 100 satisfies a relationship of 0.8 < F1 / F < 1, and the optical lens 100 satisfying the relationship can make the first lens L1 have a proper positive refractive power, and realize a long-focus function of the optical lens 100.

[0100] In an embodiment, the optical lens 100 satisfies a relationship of -0.8 < F2 / F < -0.5, and F2 is a focal length of the second lens L2. By controlling the F2 / F ratio to satisfy the above relationship, the total length of the optical lens 100 can be effectively reduced, while the refractive power of the second lens L2 can be ensured to be within a reasonable range, effectively improving the balance effect of the near-axis aberration when light converges, thereby improving the imaging quality.

[0101] In an embodiment, the optical lens 100 satisfies a relationship of 5 < |F3 / F| < 30, and F3 is a focal length of the third lens L3. By reasonably selecting the focal length of the third lens L3, the long-focus characteristics of the optical lens 100 can be satisfied while correcting the aberration.

[0102] In an embodiment, the optical lens 100 satisfies a relationship of 0.8 < F4 / F < 1.5, and F4 is a focal length of the fourth lens L4. By controlling the positive refractive power of the fourth lens L4 within a reasonable range, the overall focal length of the optical lens 100 can be increased, and the effect of balancing the field curvature can also be achieved.

[0103] In an embodiment, the optical lens 100 satisfies a relationship of 0.5 < F5 / F < 3, and F5 is a focal length of the fifth lens L5. By reasonably setting the focal length of the fifth lens L5 to ensure that the refractive power of the fifth lens L5 is negative, the optical lens 100 can have the function of adjusting the position of light, and the field curvature can be better balanced.

[0104] In an embodiment, the optical lens 100 satisfies a relationship of -0.8 < F6 / F < -0.5, and by controlling the ratio between the focal length of the sixth lens L6 and the focal length of the optical lens 100, the matching with the chip can be improved, high resolution can be realized, and the miniaturization of the optical lens 100 can be ensured.

[0105] In an embodiment, the optical lens 100 can also satisfy the following relations: 4 < R2 / R1 < 30, R3 / R4 < -10, 0.8 < R6 / R5 < 1.5, -5 < R8 / R7 < 0, 1 < |R10 / R9| < 5, -50 < R12 / R11 < 0, where R1 is the radius of curvature of the object side surface 11 of the first lens L1 at the optical axis, R2 is the radius of curvature of the image side surface 12 of the first lens L1 at the optical axis, R3 is the radius of curvature of the object side surface 21 of the second lens L2 at the optical axis, R4 is the radius of curvature of the image side surface 22 of the second lens L2 at the optical axis, R5 is the radius of curvature of the object side surface 31 of the third lens L3 at the optical axis, R6 is the radius of curvature of the image side surface 32 of the third lens L3 at the optical axis, R7 is the radius of curvature of the object side surface 41 of the fourth lens L4 at the optical axis, R8 is the radius of curvature of the image side surface 42 of the fourth lens L4 at the optical axis, R9 is the radius of curvature of the object side surface 51 of the fifth lens L5 at the optical axis, R10 is the radius of curvature of the image side surface 52 of the fifth lens L5 at the optical axis, R11 is the radius of curvature of the object side surface 61 of the sixth lens L6 at the optical axis, and R12 is the radius of curvature of the image side surface 62 of the sixth lens L6 at the optical axis. By reasonably matching the ratio between the radii of curvature of the object side surface and the image side surface of each lens at the optical axis, the surface shape difference of each lens is reasonably set, which is conducive to controlling the shape of each lens, correcting the aberration generated by itself, and improving the imaging quality.

[0106] The optical lens 100 of the present embodiment will be described in detail below in combination with specific parameters.

[0107] Embodiment 1

[0108] Figure 1 The structure diagram of the optical lens 100 disclosed in Embodiment 1 of the present application is shown in FIG. 1. The optical lens 100 includes, in order from the object side to the image side along the optical axis, a first lens L1, a second lens L2, a third lens L3, a diaphragm 102, a fourth lens L4, a fifth lens L5, a sixth lens L6, a filter 110, and a protective glass 120. The first lens L1 has positive refractive power, the object side surface 11 of the first lens L1 is convex at the near optical axis, and the image side surface 12 of the first lens L1 is concave at the near optical axis. The second lens L2 has negative refractive power, the object side surface 21 and the image side surface 22 of the second lens L2 are both concave at the near optical axis. The third lens L3 has negative refractive power, the object side surface 31 of the third lens L3 is concave at the near optical axis, and the image side surface 32 of the third lens L3 is convex at the near optical axis. The fourth lens L4 has positive refractive power, the object side surface 41 and the image side surface 42 of the fourth lens L4 are both convex at the near optical axis. The fifth lens L5 has positive refractive power, the object side surface 51 and the image side surface 52 of the fifth lens L5 are both convex at the near optical axis. The sixth lens L6 has negative refractive power, the object side surface 61 and the image side surface 62 of the sixth lens L6 are both concave at the near optical axis.

[0109] Specifically, taking the focal length F = 16.4867 mm of the optical lens 100, the aperture number FNO = 2.02 of the optical lens 100, and half of the maximum field angle of the optical lens 100 HFOV = 16.2848 deg as examples, other parameters of the optical lens 100 are given in Table 1 below. Wherein, the elements along the optical axis of the optical lens 100 are arranged in the order of the elements in Table 1 from top to bottom from the object side to the image side. In the same lens, the surface with a smaller surface serial number is the object side surface of the lens, and the surface with a larger surface serial number is the image side surface of the lens, such as the surface serial numbers 1 and 2 corresponding to the object side surface 11 and the image side surface 12 of the first lens L1 respectively. The Y radius in Table 1 is the radius of curvature of the object side surface or the image side surface with the corresponding surface serial number at the optical axis. The first value in the "thickness" parameter column of the lens is the thickness of the lens at the optical axis, and the second value is the distance from the image side surface of the lens to the vertex of the next surface at the optical axis. The value in the "thickness" parameter column of the diaphragm 102 is the distance from the vertex of the diaphragm 102 to the vertex of the next surface at the optical axis, and the positive direction of the optical axis is from the object side surface of the first lens L1 to the image side surface of the last lens. When the value is negative, it indicates that the diaphragm 102 is arranged on the image side of the vertex of the next surface. If the thickness of the diaphragm 102 is positive, the diaphragm 102 is on the object side of the vertex of the next surface. It can be understood that the units of the Y radius, thickness, and focal length in Table 1 are mm. The refractive index, Abbe number, and the like in Table 1 are obtained at a reference wavelength of 587.5618 nm, and the focal length is obtained at a reference wavelength of 550 nm.

[0110] Table 1

[0111]

[0112]

[0113] Figure 2 The spherical aberration diagram (mm), the astigmatism diagram (mm), and the distortion diagram (%) of the optical lens disclosed in Embodiment 1 of the present application are shown in FIGS. 1A, 1B, and 1C respectively. Figure 2 (A) in FIG. 1A is the spherical aberration diagram of the optical lens 100 at wavelengths of 660 nm, 590 nm, 550 nm, 510 nm, and 435 nm. Wherein, the abscissa along the X axis direction represents the focal point offset, and the unit is mm. The ordinate along the Y axis direction represents the normalized field of view. From the spherical aberration diagram, it can be seen that the spherical aberration of the optical lens 100 is small, and the imaging quality of the optical lens 100 is good. Figure 2 As can be seen from (A) in FIG. 1A, the spherical aberration value of the optical lens 100 in Embodiment 1 is better, which indicates that the imaging quality of the optical lens 100 in the embodiment is better.

[0114] Figure 2(B) in FIG. 6 is the astigmatism graph of the optical lens 100 in Embodiment 1 at a wavelength of 550 nm. In the astigmatism graph, the abscissa along the X-axis direction represents the focal shift, in mm, and the ordinate along the Y-axis direction represents the image height, in mm. T in the astigmatism graph represents the curvature of the imaging surface 101 in the meridional direction, and S represents the curvature of the imaging surface 101 in the sagittal direction, which are calculated by Figure 2 It can be seen from (B) in FIG. 6 that, at the wavelength, the curvature of field of the optical lens 100 is small, and the curvature of field and the astigmatism of each field of view are well corrected, and the center and the edge of the field of view have clear imaging, that is, the astigmatism of the optical lens 100 is well compensated.

[0115] Figure 2 (C) in FIG. 7 is the distortion graph of the optical lens 100 in Embodiment 1 at a wavelength of 550 nm. In the distortion graph, the abscissa along the X-axis direction represents the distortion, and the ordinate along the Y-axis direction represents the image height, in mm. The distortion is calculated by Figure 2 It can be seen from (C) in FIG. 7 that, at the wavelength, the image distortion caused by the main light beam is small, and the distortion of the optical lens 100 is well corrected.

[0116] Embodiment 2

[0117] Figure 3 FIG. 8 is a structural schematic diagram of the optical lens 100 disclosed in Embodiment 2 of the present application. The optical lens 100 comprises, in order from the object side to the image side along the optical axis, a first lens L1, a second lens L2, a third lens L3, a diaphragm 102, a fourth lens L4, a fifth lens L5, a sixth lens L6, a filter 110, and a protective glass 120. The first lens L1 has positive refractive power, the object side surface 11 of the first lens L1 is a convex surface at the vicinity of the optical axis, and the image side surface 12 of the first lens L1 is a concave surface at the vicinity of the optical axis; the second lens L2 has negative refractive power, the object side surface 21 and the image side surface 22 of the second lens L2 are concave surfaces at the vicinity of the optical axis; the third lens L3 has positive refractive power, the object side surface 31 of the third lens L3 is a concave surface at the vicinity of the optical axis, and the image side surface 32 of the third lens L3 is a convex surface at the vicinity of the optical axis; the fourth lens L4 has positive refractive power, the object side surface 41 and the image side surface 42 of the fourth lens L4 are convex surfaces at the vicinity of the optical axis; the fifth lens L5 has positive refractive power, the object side surface 51 of the fifth lens L5 is a convex surface at the vicinity of the optical axis, and the image side surface 52 of the fifth lens L5 is a concave surface at the vicinity of the optical axis; and the sixth lens L6 has negative refractive power, the object side surface 61 and the image side surface 62 of the sixth lens L6 are concave surfaces at the vicinity of the optical axis.

[0118] Specifically, taking the focal length F = 16.6791mm of the optical lens 100, the aperture number FNO = 2 of the optical lens 100, and half of the maximum field angle HFOV = 16.062deg of the optical lens 100 as examples, other parameters of the optical lens 100 are shown in Table 2 below. And the definition of each parameter can be obtained from the foregoing description of the embodiments, which will not be repeated here. And the refractive index, Abbe number, etc. in Table 2 are obtained at the reference wavelength of 587.5618nm, and the focal length is obtained at the reference wavelength of 550nm.

[0119] Table 2

[0120]

[0121]

[0122] Figure 4 (A) in FIG. 4 is a spherical aberration diagram of the optical lens 100 disclosed in Embodiment 2 of the present application at wavelengths of 660nm, 590nm, 550nm, 510nm, 450nm, and 415nm, Figure 4 (B) and (C) in FIG. 4 are, respectively, a ray aberration diagram and a distortion diagram of the optical lens 100 in Embodiment 2 at a wavelength of 550nm. From Figure 4 (A) the spherical aberration diagram, (B) the ray aberration diagram, and (C) the distortion diagram in FIG. 4, it can be seen that the spherical aberration, the ray aberration, and the distortion of the optical lens 100 are well controlled, so that the optical lens 100 of this embodiment has good imaging quality.

[0123] Embodiment 3

[0124] Figure 5 FIG. 5 is a structural schematic diagram of the optical lens 100 disclosed in Embodiment 3 of the present application. The optical lens 100 comprises, in order from the object side to the image side along the optical axis, a first lens L1, a second lens L2, a third lens L3, a diaphragm 102, a fourth lens L4, a fifth lens L5, a sixth lens L6, a filter 110, and a protective glass 120. The first lens L1 has positive refractive power. The object side surface 11 of the first lens L1 is convex at the near optical axis, and the image side surface 12 of the first lens L1 is concave at the near optical axis. The second lens L2 has negative refractive power. The object side surface 21 and the image side surface 22 of the second lens L2 are both concave at the near optical axis. The third lens L3 has positive refractive power. The object side surface 31 of the third lens L3 is concave at the near optical axis, and the image side surface 32 of the third lens L3 is convex at the near optical axis. The fourth lens L4 has positive refractive power. The object side surface 41 and the image side surface 42 of the fourth lens L4 are both convex at the near optical axis. The fifth lens L5 has positive refractive power. The object side surface 51 and the image side surface 52 of the fifth lens L5 are both convex at the near optical axis. The sixth lens L6 has negative refractive power. The object side surface 61 and the image side surface 62 of the sixth lens L6 are both concave at the near optical axis.

[0125] Specifically, taking the focal length F = 16.5752 mm of the optical lens 100, the aperture number FNO = 2 of the optical lens 100, and half of the maximum field angle HFOV = 16.0249 deg of the optical lens 100 as examples, other parameters of the optical lens 100 are given in Table 3 below. And the definition of each parameter can be obtained from the description of the foregoing embodiments, which will not be repeated here. And the refractive index, Abbe number, etc. in Table 3 are obtained at a reference wavelength of 587.5618 nm, and the focal length is obtained at a reference wavelength of 550 nm.

[0126] Table 3

[0127]

[0128] Figure 6 (A) in FIG. 4 is a spherical aberration diagram of the optical lens 100 disclosed in Embodiment 3 of the present application at wavelengths of 660 nm, 590 nm, 550 nm, 510 nm, and 450 nm, Figure 6 (B) and (C) in FIG. 4 are, respectively, a ray aberration diagram and a distortion diagram of the optical lens 100 in Embodiment 3 at a wavelength of 550 nm. From Figure 6 (A) the spherical aberration diagram, (B) the ray aberration diagram, and (C) the distortion diagram in FIG. 4, it can be seen that the spherical aberration, the ray aberration, and the distortion of the optical lens 100 are well controlled, so that the optical lens 100 of this embodiment has good imaging quality.

[0129] Embodiment 4

[0130] Figure 7 The structural schematic diagram of the optical lens 100 disclosed in Embodiment 4 of the present application is shown in FIG. 5, taking the focal length F = 16.6368 mm of the optical lens 100, the aperture number FNO = 2.02 of the optical lens 100, and half of the maximum field angle HFOV = 16.0295 deg of the optical lens 100 as examples, other parameters of the optical lens 100 are given in Table 4 below. And the definition of each parameter can be obtained from the description of the foregoing embodiments, which will not be repeated here. And the refractive index, Abbe number, etc. in Table 4 are obtained at a reference wavelength of 587.5618 nm, and the focal length is obtained at a reference wavelength of 550 nm. In addition, for the refractive power of each lens and the correspondence between the surface serial number and the object side surface and the image side surface of each lens, please refer to the description of Embodiment 3 described above, which will not be repeated here.

[0131] Table 4

[0132]

[0133]

[0134] Figure 8is the spherical aberration graph (mm), the coma graph (mm) and the distortion graph (%) of the optical lens disclosed by Embodiment 5 of the present application. From (A) the spherical aberration graph, (B) the ray coma graph and (C) the distortion graph in Figure 8 , it can be known that the spherical aberration, the coma and the distortion of the optical lens 100 are well controlled, so that the optical lens 100 of this embodiment has good imaging quality. In addition, the wavelengths corresponding to the curves in (A), Figure 8 (B) and (C) Figure 8 (B) and (C) Figure 8 , can refer to the descriptions about (A), Figure 2 (B) and (C) Figure 2 (B) and (C) Figure 2 (B) and (C)

[0135] Embodiment 5

[0136] Figure 9 is a structural schematic view of the optical lens 100 disclosed by Embodiment 5 of the present application. Taking the focal length F of the optical lens 100 as 16.5055 mm, the F number FNO of the optical lens 100 as 2.02, and half of the maximum field angle HFOV of the optical lens 100 as 15.9829 deg for example, other parameters of the optical lens 100 are given in Table 5 below. And the definitions of the parameters can be obtained from the foregoing descriptions of the embodiments, which will not be repeated here. In addition, the refractive index, the Abbe number and the like in Table 5 are obtained at a reference wavelength of 587.5618 nm, and the focal length is obtained at a reference wavelength of 550 nm. Moreover, the refractive power of each lens and the correspondence between the surface serial number and the object side surface and the image side surface of each lens can refer to the descriptions of the foregoing Embodiment 3, which will not be repeated here.

[0137] Table 5

[0138]

[0139]

[0140] Figure 10 is the spherical aberration graph (mm), the coma graph (mm) and the distortion graph (%) of the optical lens disclosed by Embodiment 5 of the present application. From (A) the spherical aberration graph, (B) the ray coma graph and (C) the distortion graph in Figure 10 , it can be known that the spherical aberration, the coma and the distortion of the optical lens 100 are well controlled, so that the optical lens 100 of this embodiment has good imaging quality. In addition, the wavelengths corresponding to the curves in (A), Figure 10 (B) and (C) Figure 10 (B) and (C) Figure 10 (B) and (C) Figure 2 (B) and (C) Figure 2(B) Figure 2 The content described in (C) will not be repeated here.

[0141] Example 6

[0142] Figure 11 This is a schematic diagram of the optical lens 100 disclosed in Embodiment 6 of this application. Taking the focal length F = 14mm, the aperture number FNO = 2, and the maximum field of view HFOV = 18.9785deg of the optical lens 100 as examples, other parameters of the optical lens 100 are given in Table 6 below. The definitions of each parameter can be derived from the description of the foregoing embodiments, and will not be repeated here. The refractive index, Abbe number, etc. in Table 6 are all obtained at a reference wavelength of 587.5618nm, and the focal length is obtained at a reference wavelength of 550nm. In addition, regarding the refractive power of each lens and the correspondence between the number of each surface and the object side and image side of each lens, please refer to the description in Embodiment 3 above, and will not be repeated here.

[0143] Table 6

[0144]

[0145] Figure 12 These are the spherical aberration diagram (mm), astigmatism diagram (mm), and distortion diagram (%) of the optical lens disclosed in Embodiment 6 of this application. Figure 10 As can be seen from (A) the spherical aberration diagram, (B) the ray astigmatism diagram, and (C) the distortion diagram, the spherical aberration, astigmatism, and distortion of the optical lens 100 are all well controlled, thus the optical lens 100 of this embodiment has good imaging quality. Furthermore, regarding... Figure 12 (A) Figure 12 (B) and Figure 12 The wavelengths corresponding to the curves in (C) can be found in Example 2. Figure 4 (A) Figure 2 (B) Figure 2 The content described in (C) will not be repeated here.

[0146] Example 7

[0147] Figure 13A structural diagram of the optical lens 100 disclosed in Embodiment 7 of the present application is shown, taking the focal length F of the optical lens 100 as 16.6775 mm, the F-number FNO of the optical lens 100 as 1.75, the half of the maximum field of view angle HFOV of the optical lens 100 as 16.0646 deg, and other parameters of the optical lens 100 being given in Table 7 below. And the definitions of the parameters can be obtained from the foregoing description of the embodiments, which will not be repeated here. And the refractive index, Abbe number, etc. in Table 7 are obtained at a reference wavelength of 587.5618 nm, and the focal length is obtained at a reference wavelength of 550 nm. In addition, the refractive power of each lens and the correspondence between the surface serial number and the object side surface and the image side surface of each lens are described in the foregoing Embodiment 3, which will not be repeated here.

[0148] Table 7

[0149]

[0150] Figure 14 The (A) spherical aberration diagram, (B) ray aberration diagram, and (C) distortion diagram of the optical lens 100 disclosed in Embodiment 7 of the present application are shown in FIG. 7. Figure 10 As can be seen from the (A) spherical aberration diagram, (B) ray aberration diagram, and (C) distortion diagram of the optical lens 100 disclosed in Embodiment 7 of the present application, the spherical aberration, ray aberration, and distortion of the optical lens 100 are well controlled, so that the optical lens 100 of this embodiment has good imaging quality. In addition, the corresponding wavelengths of the curves in (A), Figure 14 (B), and (C) can refer to the description of the corresponding wavelengths of the curves in (A), Figure 14 (B), and (C) in Embodiment 2, which will not be repeated here. Figure 14 Figure 4 Figure 2 Figure 2

[0151] Please refer to Table 8, which is a summary of the ratios of the relationships in Embodiments 1 to 7 of the present application.

[0152] Table 8

[0153]

[0154]

[0155] Please refer to Figure 15 ​​​​The application further discloses a camera module 200, which comprises an image sensor 201 and the optical lens 100 as described in any one of the above embodiments 1 to 7, and the image sensor 201 is arranged on the image side of the optical lens 100. Specifically, the photosensitive surface of the image sensor 201 is located at the imaging surface 101 of the optical lens 100, and the light rays of an object incident on the photosensitive surface through the lens can be converted into an image electrical signal. The image sensor 201 can be a complementary metal oxide semiconductor (CMOS) or a charge-coupled device (CCD). The camera module 200 can be an imaging module integrated on a terminal device 300, or can be a separate lens. It can be understood that the camera module 200 with the above optical lens 100 has all the technical effects of the optical lens 100, that is, the camera module 200 can meet the design requirements of miniaturization while the optical lens 100 has good imaging quality. Since the above technical effects have been described in detail in the embodiments of the optical lens 100, they will not be described here.

[0156] The application further discloses a terminal device 300, which comprises a housing 301 and the above camera module 200, and the camera module 200 is arranged on the housing 301. The terminal device 300 can include but is not limited to a mobile phone, a tablet computer, a notebook computer, a smart watch, a vehicle-mounted device, a drone, a monitor and the like. Please refer to Figure 16 Taking the terminal device 300 as a vehicle as an example, the housing 301 can be a vehicle body at this time, and the camera module 200 can be arranged on the vehicle body, for example, can be arranged inside or outside the vehicle body. It can be understood that the terminal device 300 with the above camera module 200 also has all the technical effects of the optical lens 100. That is, the terminal device 300 can meet the design requirements of miniaturization while the optical lens 100 has good imaging quality. Since the above technical effects have been described in detail in the embodiments of the optical lens 100, they will not be described here.

[0157] The optical lens, the camera module and the terminal device disclosed in the embodiments of the application are described in detail above, and the principles and implementation manners of the application are described by applying specific examples; the above embodiment descriptions are only used to help understand the optical lens, the camera module and the terminal device and the core ideas thereof; meanwhile, for those skilled in the art, according to the ideas of the application, the specific implementation manners and application ranges will be changed, and the above description should not be understood as limiting the application.

Claims

1. An optical lens characterized in that, There are six lenses with refractive power, including a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens arranged in sequence along the optical axis from the object side to the image side; The first lens has positive refractive power, the object side surface of the first lens is convex at the near optical axis, and the image side surface of the first lens is concave at the near optical axis; The second lens has negative refractive power, the object side surface and the image side surface of the second lens are concave at the near optical axis; The third lens has refractive power, the object side surface of the third lens is concave at the near optical axis, and the image side surface of the third lens is convex at the near optical axis; The fourth lens has positive refractive power, the object side surface and the image side surface of the fourth lens are convex at the near optical axis; The fifth lens has positive refractive power, the object side surface of the fifth lens is convex at the near optical axis; The sixth lens has negative refractive power, the object side surface and the image side surface of the sixth lens are concave at the near optical axis; The optical lens satisfies the following relationship: 15deg<HFOV<20deg, 1.75≤FNO<2.1 and 1.1<SD8 / SD5<1.3; Wherein, HFOV is half of the maximum field of view angle of the optical lens, FNO is the aperture number of the optical lens, SD5 is half of the maximum effective diameter of the object side surface of the third lens, and SD8 is half of the maximum effective diameter of the image side surface of the fourth lens.

2. The optical lens of claim 1, wherein, The optical lens satisfies the following relationship: 5.5<TTL / IMGH<7, and / or, 1.7<TTL / F<1.9, and / or, 3<F / IMGH<4; Wherein, TTL is the distance from the object side surface of the first lens to the imaging surface of the optical lens on the optical axis, IMGH is half of the image height corresponding to the maximum field of view angle of the optical lens, and F is the focal length of the optical lens.

3. The optical lens of claim 1, wherein, The optical lens satisfies the following relationship: |F12 / F|<20, and / or, |F56 / F|<30, and / or, -2<F1 / F6<-1.1; Wherein, F12 is the combined focal length of the first lens and the second lens, F56 is the combined focal length of the fifth lens and the sixth lens, F1 is the focal length of the first lens, F6 is the focal length of the sixth lens, and F is the focal length of the optical lens.

4. The optical lens of claim 1, wherein, The optical lens satisfies the following relationship: 0.5<F5 / F<3, and / or, 3<F5 / CT5<20, and / or, 1<CT5 / ET5<3; Wherein, F5 is the focal length of the fifth lens, CT5 is the thickness of the fifth lens on the optical axis, ET5 is the distance in the optical axis direction from the maximum effective diameter of the object side surface of the fifth lens to the maximum effective diameter of the image side surface of the fifth lens, and F is the focal length of the optical lens.

5. The optical lens of claim 1, wherein, The optical lens satisfies the following relationship: 1.1<CT2 / SAG4<2.1, and / or, 1.1<ET6 / CT6<1.25; Where, CT2 is the thickness of the second lens on the optical axis, SAG4 is the distance on the optical axis from the intersection of the image side of the second lens and the optical axis to the maximum effective aperture of the image side of the second lens, CT6 is the thickness of the sixth lens on the optical axis, and ET6 is the distance in the optical axis direction from the maximum effective aperture of the object side of the sixth lens to the maximum effective aperture of the image side of the sixth lens.

6. The optical lens of claim 1, wherein, The optical lens satisfies the following relational expressions: 5 < CT MAX / CT MIN <7.5, and / or, 1.5 < CT6 / CT1 < 2; wherein CT MAX is the maximum thickness on the optical axis of the first to sixth lenses, CT MIN is the minimum thickness on the optical axis of the first to sixth lenses, CT1 is the thickness on the optical axis of the first lens, and CT6 is the thickness on the optical axis of the sixth lens.

7. The optical lens of claim 1, wherein, The optical lens satisfies the following relational expressions: -5 < R8 / R7 < 0, and / or, -25 < SD8 / SAG8 < -5; Where, R7 is the radius of curvature of the object side of the fourth lens at the optical axis, R8 is the radius of curvature of the image side of the fourth lens at the optical axis, and SAG8 is the distance on the optical axis from the intersection of the image side of the fourth lens and the optical axis to the maximum effective aperture of the image side of the fourth lens.

8. The optical lens of claim 1, wherein, The optical lens satisfies the following relational expressions: 7.5deg < HFOV / FNO < 9.5deg, and / or, 1 < |SAG9 / SAG10| < 4, and / or, 1.45 < CT1 / ET1 < 1.7; Where, SAG9 is the distance on the optical axis from the intersection of the object side of the fifth lens and the optical axis to the maximum effective aperture of the object side of the fifth lens, SAG10 is the distance on the optical axis from the intersection of the image side of the fifth lens and the optical axis to the maximum effective aperture of the image side of the fifth lens, CT1 is the thickness of the first lens on the optical axis, and ET1 is the distance in the optical axis direction from the maximum effective aperture of the object side of the first lens to the maximum effective aperture of the image side of the first lens.

9. An image capture module, comprising: The imaging module includes an image sensor and the optical lens according to any one of claims 1-8, and the image sensor is disposed on the image side of the optical lens.

10. A terminal device, comprising: The terminal device includes a housing and the imaging module according to claim 9, and the imaging module is disposed in the housing.

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