Optical imaging lens, camera device and electronic equipment

Abstract

The present invention relates to the technical field of optical imaging devices, and specifically discloses an optical imaging lens, a camera device and an electronic device. The optical imaging lens includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens arranged in sequence from the object side to the image side, and the optical imaging lens satisfies the conditional formula: SD11*FNO / (ImgH*2)<0.35, wherein SD11 is half of the optical effective aperture of the object side of the first lens, FNO is the aperture number of the optical imaging lens, and ImgH is the vertical distance from the farthest point of the image from the optical axis to the optical axis. The optical imaging lens can be mounted on a full-screen mobile phone, placed in the screen hole or hidden under the screen, thereby increasing the screen-to-body ratio; the large aperture of the optical imaging lens can obtain a higher amount of light, thereby enhancing the dark light shooting effect and close-up shooting effect of the optical imaging lens.

Description

Technical Field

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

[0002] With the rapid upgrading of consumer electronic products such as smart phones, portable computers and tablet devices, the market has higher and higher requirements for the quality of optical imaging lenses for electronic products. The improvement of semiconductor manufacturing process technology has achieved the reduction of pixel size of photosensitive devices, and the optical imaging system has gradually developed towards the high-pixel field, which has also put forward higher requirements for imaging quality.

[0003] Traditional optical imaging lenses installed in mobile phone cameras mostly use three-piece or four-piece lens structures. With the development of technology and the increase in diversified user needs, in order to obtain better imaging quality, five-piece, six-piece, and seven-piece lens structures have gradually appeared in lens design. However, the current front camera opening of mobile phones is large, the screen-to-body ratio is not high enough, and the rear camera pixels are not high, and the aperture is not large enough, which makes it difficult to meet people's usage needs. Summary of the invention

[0004] The present invention discloses an optical imaging lens, a camera device and an electronic device. The optical imaging lens can be mounted on a full-screen mobile phone and placed in a hole in the screen or hidden under the screen, thereby increasing the screen-to-body ratio. The optical imaging lens can also be used as a rear camera for the mobile phone, and has a longer focal length, a larger field of view angle and a large image surface, and can match a high-pixel photosensitive chip. The large aperture of the optical imaging lens can obtain a higher amount of light, thereby enhancing the dark-light shooting effect and close-up shooting effect of the optical imaging lens.

[0005] In order to achieve the above object, an embodiment of the present invention discloses an optical imaging lens, wherein the optical imaging lens comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens arranged in sequence from the object side to the image side;

[0006] The first lens has positive refractive power, the second lens has refractive power, the third lens has refractive power, the fourth lens has refractive power, the fifth lens has positive refractive power, the sixth lens has refractive power, and the seventh lens has negative refractive power;

[0007] The optical imaging lens satisfies the condition: SD11*FNO / (ImgH*2)<0.35;

[0008] Among them, SD11 is half of the optical effective aperture of the object side of the first lens, FNO is the aperture number of the optical imaging lens, and ImgH is the vertical distance from the farthest point of the image from the optical axis to the optical axis.

[0009] The ImgH in the present invention determines the size of the electronic photosensitive chip. The larger the ImgH is, the larger the maximum size of the electronic photosensitive chip that can be supported is. When the optical imaging lens meets the condition SD11*FNO / (ImgH*2)<0.35, the optical imaging lens can support high-pixel electronic photosensitive chips. In the specific design, the optical imaging lens can obtain a higher amount of light input by designing a larger aperture number FNO, thereby enhancing the dark light shooting effect and close-up shooting effect of the optical imaging lens, and by reducing the optical effective aperture of the first lens, the optical imaging lens can have the characteristics of a small head. When in use, the optical imaging lens can be mounted on a full-screen mobile phone to increase the screen-to-body ratio of the mobile phone. With the improvement of the screen transmittance, the optical imaging lens can also be hidden under the screen for under-screen photography. The optical imaging lens with a small head is conducive to reducing the activity of the components that cooperate with the camera, thereby improving the stability and efficiency of the camera.

[0010] As an optional implementation, in an embodiment of the present invention, the optical imaging lens satisfies the conditional formula: f / TTL>0.7, wherein f is the total effective focal length of the optical imaging lens, and TTL is the distance from the object side of the first lens to the imaging surface of the optical imaging lens on the optical axis. When the optical imaging lens satisfies the conditional formula f / TTL>0.7, the optical imaging lens shortens the total optical length while maintaining a longer focal length, which is beneficial to the miniaturization design of the optical imaging lens and also beneficial to clear imaging of distant scenes.

[0011] As an optional implementation, in an embodiment of the present invention, the optical imaging lens satisfies the conditional formula: 2<f / ∑AT<3, wherein f is the total effective focal length of the optical imaging lens, and ∑AT is the sum of the air spacings on the optical axis between two adjacent lenses of the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, and the seventh lens. When the optical imaging lens satisfies the conditional formula 2<f / ∑AT<3, it is beneficial to reduce the spacing between adjacent lenses and the optical axis within the processable range while maintaining a larger focal length, thereby reducing the total length of the optical imaging lens and making the optical imaging lens thinner. When f / ∑AT>3, the spacing between adjacent lenses and the optical axis is too small, which will increase the sensitivity of assembly tolerances, be unfavorable for lens transfer, and increase processing difficulty.

[0012] As an optional implementation, in an embodiment of the present invention, the optical imaging lens satisfies the conditional formula: TTL / EPD<2.5, wherein TTL is the distance from the object side of the first lens to the imaging surface of the optical imaging lens on the optical axis, and EPD is the entrance pupil diameter of the optical imaging lens. When the optical imaging lens satisfies the conditional formula TTL / EPD<2.5, the overall length of the optical imaging lens can be reduced, and the amount of light entering can be increased, so that the optical imaging lens can be thin and light while having a good low-light shooting effect.

[0013] As an optional implementation, in an embodiment of the present invention, the optical imaging lens satisfies the conditional formula f / ImgH<1.35, where f is the total effective focal length of the optical imaging lens. When the optical imaging lens satisfies the conditional formula f / ImgH<1.35, the optical imaging lens can have a larger image plane while maintaining a larger focal length, and can match a high-pixel electronic photosensitive chip to achieve a high-pixel effect.

[0014] As an optional implementation, in an embodiment of the present invention, the optical imaging lens satisfies the conditional formula: SD11 / tan(Semi-FOV)<2.4mm, wherein tan(Semi-FOV) is the tangent value of half the maximum field of view of the optical imaging lens. When the optical imaging lens satisfies the conditional formula SD11 / tan(Semi-FOV)<2.4mm, the aperture of the first lens can be reduced, so that the optical imaging lens has the characteristic of a small head, and can be mounted on a full-screen mobile phone to increase the screen-to-body ratio of the mobile phone; as the screen transmittance increases, the optical imaging lens can also be hidden under the screen for under-screen photography. The small head is conducive to reducing the amount of activity of the components that cooperate with the camera, improving the stability and efficiency of the camera, and can also make the optical imaging lens have the characteristic of a larger field of view, so that a wider field of view can be captured.

[0015] As an optional implementation, in an embodiment of the present invention, the optical imaging lens satisfies the conditional formula: SD11 / SD71<0.5, wherein SD72 is half of the optical effective aperture of the image side surface of the seventh lens. When the optical imaging lens satisfies the conditional formula SD11 / SD71<0.5, the optical imaging lens can be further miniaturized and have a small head size.

[0016] As an optional implementation, in an embodiment of the present invention, the optical imaging lens satisfies the conditional formula: 0.1<BF / f, wherein BF is the minimum axial distance from the image side surface of the seventh lens to the imaging surface of the optical imaging lens, and f is the total effective focal length of the optical imaging lens. When the optical imaging lens satisfies the conditional formula 0.1<BF / f, the optical imaging lens can maintain a longer back focal length, and the optical imaging lens can better match different types of electronic photosensitive chips to meet different design requirements.

[0017] As an optional implementation, in an embodiment of the present invention, the optical imaging lens satisfies the conditional formula: |f12345 / f67|>0.5, wherein f12345 is the combined focal length of the first lens, the second lens, the third lens, the fourth lens and the fifth lens, and f67 is the combined focal length of the sixth lens and the seventh lens. When the optical imaging lens satisfies the conditional formula |f12345 / f67|>0.5, the refractive power of the first lens, the second lens, the third lens, the fourth lens, the sixth lens and the seventh lens can be reasonably distributed, which helps to correct the spherical aberration and chromatic aberration of the optical imaging lens, so that the optical imaging lens has excellent imaging, and also helps to reasonably bend the light, shorten the total length of the optical imaging lens, and make the optical imaging lens thinner.

[0018] On the other hand, an embodiment of the present invention further discloses a camera device, which includes a photosensitive element and the above-mentioned optical imaging lens, wherein the photosensitive element is arranged on the image side of the optical imaging lens.

[0019] In a third aspect, an embodiment of the present invention further discloses an electronic device, which includes a housing and the above-mentioned camera device, wherein the camera device is disposed in the housing.

[0020] Compared with the prior art, the optical imaging lens, camera device and electronic device of the present invention have at least the following beneficial effects:

[0021] The ImgH in the present invention determines the size of the electronic photosensitive chip. The larger the ImgH is, the larger the maximum size of the electronic photosensitive chip that can be supported is. When the optical imaging lens meets the condition SD11*FNO / (ImgH*2)<0.35, the optical imaging lens can support high-pixel electronic photosensitive chips. In the specific design, the optical imaging lens can obtain a higher amount of light input by designing a larger aperture number FNO, thereby enhancing the dark light shooting effect and close-up shooting effect of the optical imaging lens, and by reducing the optical effective aperture of the first lens, the optical imaging lens can have the characteristics of a small head. When in use, the optical imaging lens can be mounted on a full-screen mobile phone to increase the screen-to-body ratio of the mobile phone. With the improvement of the screen transmittance, the optical imaging lens can also be hidden under the screen for under-screen photography. The optical imaging lens with a small head is conducive to reducing the activity of the components that cooperate with the camera, thereby improving the stability and efficiency of the camera. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 is a schematic structural diagram of an optical imaging lens disclosed in Embodiment 1 of the present invention;

[0024] Figure 2 is a longitudinal spherical aberration curve, an astigmatism curve and a distortion curve diagram of the optical imaging lens disclosed in the first embodiment of the present invention;

[0025] Figure 3 is a schematic structural diagram of an optical imaging lens disclosed in Embodiment 2 of the present invention;

[0026] Figure 4 is a longitudinal spherical aberration curve, an astigmatism curve and a distortion curve diagram of the optical imaging lens disclosed in the second embodiment of the present invention;

[0027] Figure 5 is a schematic structural diagram of an optical imaging lens disclosed in Embodiment 3 of the present invention;

[0028] Figure 6 is a longitudinal spherical aberration curve, an astigmatism curve and a distortion curve diagram of the optical imaging lens disclosed in the third embodiment of the present invention;

[0029] Figure 7 is a schematic structural diagram of an optical imaging lens disclosed in Embodiment 4 of the present invention;

[0030] Figure 8is a longitudinal spherical aberration curve, an astigmatism curve and a distortion curve diagram of the optical imaging lens disclosed in the fourth embodiment of the present invention;

[0031] Fig. 9 is a schematic structural diagram of an optical imaging lens disclosed in Embodiment 5 of the present invention;

[0032] Fig.10 is a longitudinal spherical aberration curve, an astigmatism curve and a distortion curve diagram of the optical imaging lens disclosed in Embodiment 5 of the present invention;

[0033] Fig.11 It is a front view of the electronic device disclosed in the embodiment of the present invention.

[0034] Icons: 10, first lens; 11, object side (of the first lens); 12, image side (of the first lens); 20, second lens; 21, object side (of the second lens); 22, image side (of the second lens); 30, third lens; 31, object side (of the third lens); 32, image side (of the third lens); 40, fourth lens; 41, object side (of the fourth lens); 42, image side (of the fourth lens); 50, fifth lens; 51, object side (of the fifth lens) ); 52. image side surface (of the fifth lens); 60. sixth lens; 61. object side surface (of the sixth lens); 62. image side surface (of the sixth lens); 70. seventh lens; 71. object side surface (of the seventh lens); 72. image side surface (of the seventh lens); 80. infrared filter; 81. object side surface (of the infrared filter); 82. image side surface (of the infrared filter); 90. imaging surface; 100. aperture; 200. camera device; 300. electronic device; 301. housing. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] In the present invention, the directions or positional relationships indicated by the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like are based on the directions or positional relationships shown in the drawings. These terms are mainly used to better describe the present invention and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific direction, or to be constructed and operated in a specific direction.

[0037] In addition, some of the above terms may be used to express other meanings in addition to indicating orientation or positional relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those skilled in the art, the specific meanings of these terms in the present invention can be understood according to specific circumstances.

[0038] In addition, the terms "installed", "set", "provided with", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] In addition, the terms "first", "second", etc. are mainly used to distinguish different devices, elements or components (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance and quantity of the indicated devices, elements or components. Unless otherwise specified, "plurality" means two or more.

[0040] As mentioned in the background technology above, the traditional optical imaging lens mounted on the mobile phone camera mostly adopts a three-piece or four-piece lens structure. With the development of technology and the increase in the diversified needs of users, in order to obtain better imaging quality, five-piece, six-piece, and seven-piece lens structures have gradually appeared in the lens design. However, the current front camera opening of the mobile phone is large, the screen ratio is not high enough, and the rear camera pixel is not high, the aperture is not large enough, and it is difficult to meet people's usage needs. To this end, the present invention discloses an optical imaging lens, a camera device and an electronic device. The optical imaging lens can be mounted on a full-screen mobile phone, placed at the screen hole or hidden under the screen, which increases the screen ratio; the optical imaging lens can also be used as a rear camera of a mobile phone, with a longer focal length, a larger field of view and a large image surface, which can match a high-pixel photosensitive chip. The large aperture of the optical imaging lens can obtain a higher amount of light, which enhances the dark light shooting effect and close-up shooting effect of the optical imaging lens.

[0041] Specifically, the optical imaging lens of the present invention comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens arranged in sequence from the object side to the image side, the first lens has a positive refractive power, the second lens has a refractive power, the third lens has a refractive power, the fourth lens has a refractive power, the fifth lens has a positive refractive power, the sixth lens has a refractive power, and the seventh lens has a negative refractive power, and the optical imaging lens satisfies the conditional formula: SD11*FNO / (ImgH*2)<0.35, wherein SD11 is half of the optical effective aperture of the object side of the first lens, FNO is the aperture number of the optical imaging lens, and ImgH is the vertical distance from the farthest point of the image from the optical axis to the optical axis, that is, the image height, that is, half of the length of the effective imaging surface diagonal on the imaging plane. Specifically, the ratio of SD11*FNO / (ImgH*2) can be, for example, 0.28, 0.30, 0.31, 0.33, etc.

[0042] The ImgH in the present invention determines the size of the electronic photosensitive chip. The larger the ImgH is, the larger the maximum size of the electronic photosensitive chip that can be supported is. When the optical imaging lens meets the condition SD11*FNO / (ImgH*2)<0.35, the optical imaging lens can support high-pixel electronic photosensitive chips. In the specific design, the optical imaging lens can obtain a higher amount of light input by designing a larger aperture number FNO, thereby enhancing the dark light shooting effect and close-up shooting effect of the optical imaging lens, and by reducing the optical effective aperture of the first lens, the optical imaging lens can have the characteristics of a small head. When in use, the optical imaging lens can be mounted on a full-screen mobile phone to increase the screen-to-body ratio of the mobile phone. With the improvement of the screen transmittance, the optical imaging lens can also be hidden under the screen for under-screen photography. The optical imaging lens with a small head is conducive to reducing the activity of the components that cooperate with the camera, thereby improving the stability and efficiency of the camera.

[0043] Furthermore, the optical imaging lens in this embodiment also includes an aperture and an infrared filter, wherein the aperture can be set on the object side of the first lens, and can also be set at any position between the first lens to the seventh lens, and the infrared filter is set on the side of the seventh lens away from the sixth lens, that is, the image side of the seventh lens, so as to facilitate filtering of infrared light so that the light incident on the imaging surface is visible light.

[0044] Furthermore, the optical imaging lens of the present invention satisfies the conditional formula f / TTL>0.7, wherein f is the total effective focal length of the optical imaging lens, and TTL is the distance from the object side surface of the first lens to the imaging surface of the optical imaging lens on the optical axis. Specifically, the ratio of f / TTL can be, for example, 0.74, 0.74, 0.78, etc.

[0045] When the optical imaging lens satisfies the condition f / TTL>0.7, the optical imaging lens shortens the total optical length while maintaining a longer focal length, which is beneficial to the miniaturization design of the optical imaging lens and is also beneficial to making a clear image of a distant scene.

[0046] Furthermore, the optical imaging lens of the present invention satisfies the conditional formula: 2<f / ∑AT<3, wherein f is the total effective focal length of the optical imaging lens, and ∑AT is the sum of the air intervals on the optical axis between two adjacent lenses of the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, and the seventh lens. Specifically, the ratio of f / ∑AT can be, for example, 2.39, 2.43, 2.44, 2.45, 2.80, etc.

[0047] When the optical imaging lens satisfies the condition 2<f / ∑AT<3, it is beneficial to maintain a large focal length while reducing the distance between adjacent lenses and the optical axis within the processable range, thereby reducing the total length of the optical imaging lens and making the optical imaging lens thinner. When f / ∑AT>3, the distance between adjacent lenses and the optical axis is too small, which will increase the sensitivity of assembly tolerance, be unfavorable for lens transfer, and increase processing difficulty.

[0048] Further, the optical imaging lens satisfies the conditional formula TTL / EPD<2.5, wherein TTL is the distance from the object side surface of the first lens to the imaging surface of the optical imaging lens on the optical axis, and EPD is the entrance pupil diameter of the optical imaging lens. Specifically, the ratio of TTL / EPD can be, for example, 2.17, 2.23, 2.29, etc.

[0049] When the optical imaging lens satisfies the conditional formula TTL / EPD<2.5, the overall length of the optical imaging lens can be reduced and the amount of light entering can be increased, so that the optical imaging lens can be made lighter and thinner while also having good low-light shooting effects.

[0050] Furthermore, the optical imaging lens satisfies the conditional formula f / ImgH<1.35, wherein f is the total effective focal length of the optical imaging lens, and ImgH is the vertical distance from the farthest point of the image from the optical axis to the optical axis, i.e., the image height. Specifically, the ratio of f / ImgH can be, for example, 1.10, 1.21, 1.23, 1.23, and 1.30.

[0051] When the optical imaging lens satisfies the condition f / ImgH<1.35, the optical imaging lens can have a larger image surface while maintaining a larger focal length, and can match a high-pixel electronic photosensitive chip to achieve a high-pixel effect.

[0052] Furthermore, the optical imaging lens satisfies the conditional formula SD11 / tan(Semi-FOV)<2.4mm, wherein SD11 is half of the optical effective aperture of the object side of the first lens, and tan(Semi-FOV) is the tangent value of half of the maximum field of view of the optical imaging lens. Specifically, the value of SD11 / tan(Semi-FOV) can be, for example, 1.64, 1.98, 2.06, 2.11, 2.32, etc.

[0053] When the optical imaging lens satisfies the condition SD11 / tan(Semi-FOV)<2.4mm, the aperture of the first lens can be reduced, so that the optical imaging lens has the characteristic of a small head, and can be mounted on a full-screen mobile phone to increase the screen-to-body ratio of the mobile phone; as the screen transmittance increases, the optical imaging lens can also be hidden under the screen for under-screen photography. The small head is conducive to reducing the activity of the components that cooperate with the camera, improving the stability and efficiency of the camera, and also allowing the optical imaging lens to have a larger field of view, so that a wider field of view can be captured.

[0054] Further, the optical imaging lens satisfies the conditional formula SD11 / SD71<0.5, wherein SD11 is half of the optical effective aperture of the object side of the first lens, and SD72 is half of the optical effective aperture of the image side of the seventh lens. Specifically, the ratio of SD11 / SD71 can be, for example, 0.39, 0.41, 0.42, 0.46, etc.

[0055] When the optical imaging lens satisfies the conditional formula SD11 / SD71<0.5, the optical imaging lens can be further made to have the characteristics of miniaturization and small head size.

[0056] Further, the optical imaging lens satisfies the conditional formula 0.1<BF / f, wherein BF is the minimum axial distance from the image side surface of the seventh lens to the imaging surface of the optical imaging lens, and f is the total effective focal length of the optical imaging lens. Specifically, the ratio of BF / f can be, for example, 0.13, 0.14, 0.15, etc.

[0057] When the optical imaging lens satisfies the condition 0.1<BF / f, the optical imaging lens can maintain a longer back focal length, and the optical imaging lens can better match different types of electronic photosensitive chips to meet different design requirements.

[0058] Further, the optical imaging lens satisfies the conditional formula |f12345 / f67|>0.5, wherein f12345 is the combined focal length of the first lens, the second lens, the third lens, the fourth lens and the fifth lens, and f67 is the combined focal length of the sixth lens and the seventh lens. Specifically, the value of |f12345 / f67| can be, for example, 0.63, 1.02, 1.03, 1.17, 1.19, etc.

[0059] When the optical imaging lens satisfies the conditional formula |f12345 / f67|>0.5, the refractive power of the first lens, the second lens, the third lens, the fourth lens, the sixth lens and the seventh lens can be reasonably distributed, which helps to correct the spherical aberration and chromatic aberration of the optical imaging lens, so that the optical imaging lens has excellent imaging, and also helps to reasonably bend the light, shorten the overall length of the optical imaging lens, and make the optical imaging lens lighter and thinner.

[0060] The following is a detailed description with reference to the accompanying drawings.

[0061] Embodiment 1

[0062] See also Figure 1 and Figure 2 As shown, according to Embodiment 1 of the present invention, an optical imaging lens is provided, which includes a first lens 10, a second lens, a third lens 30, a fourth lens 40, a fifth lens 50, a sixth lens 60 and a seventh lens 70 which are sequentially arranged from the object side to the image side.

[0063] The first lens 10 has positive refractive power, the near optical axis region of the object side surface 11 of the first lens 10 is a convex surface, and the near optical axis region of the image side surface 12 of the first lens 10 is a concave surface;

[0064] The second lens 20 has negative refractive power, the near optical axis region of the object side surface 21 of the second lens 20 is a convex surface, and the near optical axis region of the image side surface 22 of the second lens 20 is a concave surface;

[0065] The third lens 30 has positive refractive power, the near optical axis region of the object side surface 31 of the third lens 30 is a convex surface, and the near optical axis region of the image side surface 32 of the third lens 30 is a concave surface;

[0066] The fourth lens 40 has negative refractive power, the near optical axis region of the object side surface 41 of the fourth lens 40 is a convex surface, and the near optical axis region of the image side surface 42 of the fourth lens 40 is a concave surface;

[0067] The fifth lens 50 has positive refractive power, the near optical axis region of the object side surface 51 of the fifth lens 50 is a concave surface, and the near optical axis region of the image side surface 52 of the fifth lens 50 is a convex surface;

[0068] The sixth lens 60 has negative refractive power, the near optical axis region of the object side surface 61 of the sixth lens 60 is a convex surface, and the near optical axis region of the image side surface 62 of the sixth lens 60 is a concave surface;

[0069] The seventh lens element 70 has negative refractive power. The near optical axis region of the object-side surface 71 of the seventh lens element 70 is a convex surface, and the near optical axis region of the image-side surface 72 of the seventh lens element 70 is a concave surface.

[0070] The optical imaging lens in this embodiment satisfies the following conditional formula:

[0071] SD11*FNO / (ImgH*2)=1.7409*1.7 / (4.5*2)=0.33<0.35;

[0072] f / TTL=5.87 / 7.5=0.78>0.7;

[0073] 2<f / ∑AT=5.87 / 2.41=2.44<3;

[0074] TTL / EPD=7.5 / 3.45=2.17<2.5;

[0075] f / ImgH=5.87 / 4.5=1.30<1.35;

[0076] SD11 / tan(Semi-FOV)=1.7409 / tan(36.94°)=2.32mm<2.4mm;

[0077] SD11 / SD71=1.7409 / 3.7981=0.46<0.5;

[0078] 0.1<BF / f=0.87 / 5.87=0.15;

[0079] |f12345 / f67|=|4.93 / -4.85|=1.02>0.5;

[0080] The above parameters have been defined before and will not be repeated here.

[0081] The materials of the first lens 10 to the seventh lens 70 are all plastic.

[0082] In addition, the optical imaging lens also includes an aperture 100, an infrared filter 80 and an imaging surface 90, wherein the aperture 100 can be set on the object side 11 of the first lens 10 to control the amount of light entering. The aperture 100 can also be set at any position between the first lens 10 to the seventh lens 70, and the infrared filter 80 is set on the side of the seventh lens 70 away from the sixth lens 60 to facilitate the filtering of infrared light, so that the light incident on the imaging surface 90 is visible light, and the wavelength of the visible light is 380nm to 780nm. The material of the infrared filter is glass, and a film can be coated on the glass. The imaging surface 90 is located on the side of the infrared filter 80 away from the seventh lens 70, and the effective pixel area of ​​the electronic photosensitive chip is located on the imaging surface 90.

[0083] Table 1 is a characteristic table of the optical imaging lens of this embodiment, wherein each data is obtained using visible light with a wavelength of 587.56 nm, and the units of Y radius, thickness, and focal length are all millimeters (mm).

[0084] Table 1:

[0085]

[0086]

[0087] Wherein, f is the total effective focal length of the optical imaging lens, FNO is the aperture number of the optical imaging lens, Semi-FOV is half of the maximum field of view of the optical imaging lens, and TTL is the distance from the object side surface 11 of the first lens 10 to the imaging surface 90 of the optical imaging lens on the optical axis.

[0088] In this embodiment, the object side surface and the image side surface of any lens of the first lens 10 to the seventh lens 70 are both aspherical surfaces, and the surface shape x of each aspherical surface can be defined by but not limited to the following aspherical surface formula:

[0089] Wherein, x is the distance vector height from the vertex of the aspheric surface when the aspheric surface is at a height of h along the optical axis; c is the paraxial curvature of the aspheric surface, c=1 / R (i.e., the paraxial curvature c is the reciprocal of the Y radius R in Table 1 above); k is the cone coefficient; A i is the correction coefficient of the aspheric surface of the i-th order.

[0090] Table 2 lists high-order coefficients A4, A6, A8, A10, A12, A14, A15, A17, A18 and A20 of the object-side surface 11 and the image-side surface 12 of the first lens 10, the object-side surface 21 and the image-side surface 22 of the second lens 20, the object-side surface 31 and the image-side surface 32 of the third lens 30, the object-side surface 41 and the image-side surface 42 of the fourth lens 40, the object-side surface 51 and the image-side surface 52 of the fifth lens 50, the object-side surface 61 and the image-side surface 62 of the sixth lens 60, and the object-side surface 71 and the image-side surface 72 of the seventh lens 70, which can be used in this embodiment.

[0091] Table 2:

[0092]

[0093]

[0094] Figure 2The longitudinal spherical aberration curve, astigmatism curve and distortion curve of the optical imaging lens in this embodiment are shown. The longitudinal spherical aberration curve indicates the deviation of the focal point of light of different wavelengths after passing through each lens of the optical system; the astigmatism curve indicates the meridian imaging surface curvature T and the sagittal imaging surface curvature S; and the distortion curve indicates the distortion magnitude value corresponding to different field angles. Figure 2 The ordinate of the longitudinal spherical aberration curve in is the normalized field of view, the ordinate of the astigmatism curve and the distortion curve is the image height, and the reference wavelength of the astigmatism curve and the distortion curve is 587.56nm. Figure 2 It can be seen that the optical imaging lens provided in the first embodiment can achieve good imaging quality.

[0095] Embodiment 2

[0096] See also Figure 3 and Figure 4 As shown, according to the second embodiment of the present invention, an optical imaging lens is provided. The structure of the optical imaging lens is basically the same as that of the first embodiment, except that the fourth lens 40 in this embodiment has positive refractive power instead of negative refractive power.

[0097] The optical imaging lens in this embodiment satisfies the following conditional formula:

[0098] SD11*FNO / (ImgH*2)=1.6607*1.69 / (4.5*2)=0.31<0.35;

[0099] f / TTL=5.60 / 7.39=0.76>0.7;

[0100] 2<f / ∑AT=5.60 / 2.342=2.39<3;

[0101] TTL / EPD=7.39 / 3.314=2.23<2.5;

[0102] f / ImgH=5.6 / 4.5=1.24<1.35;

[0103] SD11 / tan(Semi-FOV)=1.6607 / tan(38.22°)=2.11mm<2.4mm;

[0104] SD11 / SD71=1.6607 / 4.0067=0.41<0.5;

[0105] 0.1<BF / f=0.75 / 5.6=0.13;

[0106] |f12345 / f67|=|4.35 / -3.72|=1.17>0.5;

[0107] The above parameters have been defined before and will not be repeated here.

[0108] Table 3 is a characteristic table of the optical imaging lens of this embodiment, wherein each data is obtained using visible light with a wavelength of 587.56 nm, and the units of Y radius, thickness, and focal length are all millimeters (mm).

[0109] Table 3:

[0110]

[0111]

[0112] The meanings of the parameters in Table 3 are the same as those in Example 1.

[0113] Table 4 gives the high-order coefficients of each aspherical mirror surface that can be used in the second embodiment, wherein the surface shape of each aspherical surface can be defined by the formula given in the first embodiment.

[0114] Table 4:

[0115]

[0116]

[0117] Figure 4 The longitudinal spherical aberration curve, astigmatism curve and distortion curve of the optical imaging lens in this embodiment are shown. The longitudinal spherical aberration curve indicates the deviation of the focal point of light of different wavelengths after passing through each lens of the optical system; the astigmatism curve indicates the meridian imaging surface curvature T and the sagittal imaging surface curvature S; and the distortion curve indicates the distortion magnitude value corresponding to different field angles. Figure 4 The ordinate of the longitudinal spherical aberration curve in is the normalized field of view, the ordinate of the astigmatism curve and the distortion curve is the image height, and the reference wavelength of the astigmatism curve and the distortion curve is 587.56nm. Figure 4 It can be seen that the optical imaging lens provided in the second embodiment can achieve good imaging quality.

[0118] Embodiment 3

[0119] See also Figure 5 and Figure 6 As shown, according to the third embodiment of the present invention, an optical imaging lens is provided, and the structure of the optical imaging lens is basically the same as that in the first embodiment, except that the third lens 30 in this embodiment has negative refractive power instead of positive refractive power, the fourth lens 40 has positive refractive power instead of negative refractive power, and the near optical axis region of the object side surface 51 and the near optical axis region of the image side surface 52 of the fifth lens 50 in this embodiment are both convex.

[0120] The optical imaging lens in this embodiment satisfies the following conditional formula:

[0121] SD11*FNO / (ImgH*2)=1.6454*1.69 / (4.5*2)=0.31<0.35;

[0122] f / TTL=5.53 / 7.3=0.76>0.7;

[0123] 2<f / ∑AT=5.53 / 2.256=2.45<3;

[0124] TTL / EPD=7.3 / 3.272=2.23<2.5;

[0125] f / ImgH=5.53 / 4.5=1.23<1.35;

[0126] SD11 / tan(Semi-FOV)=1.6454 / tan(38.58°)=2.06mm<2.4mm;

[0127] SD11 / SD71=1.6454 / 3.9256=0.42<0.5;

[0128] 0.1<BF / f=0.75 / 5.53=0.14;

[0129] |f12345 / f67|=|4.16 / -3.50|=1.19>0.5;

[0130] The above parameters have been defined before and will not be repeated here.

[0131] Table 5 is a characteristic table of the optical imaging lens of this embodiment, wherein each data is obtained using visible light with a wavelength of 587.56 nm, and the units of Y radius, thickness, and focal length are all millimeters (mm).

[0132] Table 5:

[0133]

[0134]

[0135] The meanings of the parameters in Table 5 are the same as those in Example 1.

[0136] Table 6 gives the high-order coefficients that can be used for each aspherical mirror surface in the third embodiment, wherein the surface shape of each aspherical surface can be defined by the formula given in the first embodiment.

[0137] Table 6:

[0138]

[0139]

[0140] Figure 6 The longitudinal spherical aberration curve, astigmatism curve and distortion curve of the optical imaging lens in this embodiment are shown. The longitudinal spherical aberration curve indicates the deviation of the focal point of light of different wavelengths after passing through each lens of the optical system; the astigmatism curve indicates the meridian imaging surface curvature T and the sagittal imaging surface curvature S; and the distortion curve indicates the distortion magnitude value corresponding to different field angles. Figure 6 The ordinate of the longitudinal spherical aberration curve in is the normalized field of view, the ordinate of the astigmatism curve and the distortion curve is the image height, and the reference wavelength of the astigmatism curve and the distortion curve is 587.56nm. Figure 6 It can be seen that the optical imaging lens provided in the third embodiment can achieve good imaging quality.

[0141] Embodiment 4

[0142] See also Figure 7 and Figure 8 As shown, according to Embodiment 4 of the present invention, an optical imaging lens is provided. The structure of the optical imaging lens is basically the same as that of Embodiment 1, except that the second lens 20 in this embodiment has positive refractive power instead of negative refractive power, and the object side surface 41 and the image side surface 42 of the fourth lens 40 in this embodiment are both concave surfaces, and the object side surface 51 and the image side surface 52 of the fifth lens 50 are both convex surfaces.

[0143] The optical imaging lens in this embodiment satisfies the following conditional formula:

[0144] SD11*FNO / (ImgH*2)=1.607*1.7 / (4.5*2)=0.30<0.35;

[0145] f / TTL=5.45 / 7.35=0.74>0.7;

[0146] 2<f / ∑AT=5.45 / 1.944=2.80<3;

[0147] TTL / EPD=7.35 / 3.21=2.29<2.5;

[0148] f / ImgH=5.45 / 4.5=1.21<1.35;

[0149] SD11 / tan(Semi-FOV)=1.607 / tan(39.06°)=1.98mm<2.4mm;

[0150] SD11 / SD71=1.607 / 4.1032=0.39<0.5;

[0151] 0.1<BF / f=0.749 / 5.45=0.14;

[0152] |f12345 / f67|=|4.523 / -4.402|=1.03>0.5;

[0153] The above parameters have been defined before and will not be repeated here.

[0154] Table 7 is a characteristic table of the optical imaging lens of this embodiment, wherein each data is obtained using visible light with a wavelength of 587.56 nm, and the units of Y radius, thickness, and focal length are all millimeters (mm).

[0155] Table 7:

[0156]

[0157] The meanings of the parameters in Table 7 are the same as those in Example 1.

[0158] Table 8 gives the high-order coefficients of each aspherical mirror surface that can be used in the fourth embodiment, wherein the surface shape of each aspherical surface can be defined by the formula given in the first embodiment.

[0159] Table 8:

[0160]

[0161]

[0162] Figure 8 The longitudinal spherical aberration curve, astigmatism curve and distortion curve of the optical imaging lens in this embodiment are shown. The longitudinal spherical aberration curve indicates the deviation of the focal point of light of different wavelengths after passing through each lens of the optical system; the astigmatism curve indicates the meridian imaging surface curvature T and the sagittal imaging surface curvature S; and the distortion curve indicates the distortion magnitude value corresponding to different field angles. Figure 8 The ordinate of the longitudinal spherical aberration curve in is the normalized field of view, the ordinate of the astigmatism curve and the distortion curve is the image height, and the reference wavelength of the astigmatism curve and the distortion curve is 587.56nm. Figure 8 It can be seen that the optical imaging lens provided in the fourth embodiment can achieve good imaging quality.

[0163] Embodiment 5

[0164] See also Fig. 9 and Fig.10As shown, according to the fifth embodiment of the present invention, an optical imaging lens is provided. The structure of the optical imaging lens is basically the same as that of the first embodiment, except that the sixth lens 60 in this embodiment has positive refractive power instead of negative refractive power, and the near optical axis region of the object side surface 51 and the near optical axis region of the image side surface 52 of the fifth lens 50 in this embodiment are both convex.

[0165] The optical imaging lens in this embodiment satisfies the following conditional formula:

[0166] SD11*FNO / (ImgH*2)=1.4592*1.7 / (4.5*2)=0.28<0.35;

[0167] f / TTL=5.45 / 7.35=0.74>0.7;

[0168] 2<f / ∑AT=4.95 / 2.038=2.43<3;

[0169] TTL / EPD=6.5 / 2.91=2.23<2.5;

[0170] f / ImgH=4.95 / 4.5=1.10<1.35;

[0171] SD11 / tan(Semi-FOV)=1.4592 / tan(41.72°)=1.64mm<2.4mm;

[0172] SD11 / SD71=1.4592 / 3.7814=0.39<0.5;

[0173] 0.1<BF / f=0.75 / 4.95=0.15;

[0174] |f12345 / f67|=|5.045 / -8.058|=0.63>0.5;

[0175] The above parameters have been defined before and will not be repeated here.

[0176] Table 9 is a characteristic table of the optical imaging lens of this embodiment, wherein each data is obtained using visible light with a wavelength of 587.56 nm, and the units of Y radius, thickness, and focal length are all millimeters (mm).

[0177] Table 9:

[0178]

[0179]

[0180] The meanings of the parameters in Table 9 are the same as those in Example 1.

[0181] Table 10 gives the high-order coefficients that can be used for each aspherical mirror surface in Example 5, wherein the surface shape of each aspherical surface can be defined by the formula given in Example 1.

[0182] Table 10:

[0183]

[0184]

[0185] Fig.10 The longitudinal spherical aberration curve, astigmatism curve and distortion curve of the optical imaging lens in this embodiment are shown. The longitudinal spherical aberration curve indicates the deviation of the focal point of light of different wavelengths after passing through each lens of the optical system; the astigmatism curve indicates the meridian imaging surface curvature T and the sagittal imaging surface curvature S; and the distortion curve indicates the distortion magnitude value corresponding to different field angles. Fig.10 The ordinate of the longitudinal spherical aberration curve in is the normalized field of view, the ordinate of the astigmatism curve and the distortion curve is the image height, and the reference wavelength of the astigmatism curve and the distortion curve is 587.56nm. Fig.10 It can be seen that the optical imaging lens provided in Example 5 can achieve good imaging quality.

[0186] According to another aspect of the present invention, the present invention further provides a camera device, which includes a photosensitive element and the above-mentioned optical imaging lens, wherein the photosensitive element is arranged on the image side of the optical imaging lens.

[0187] According to the third aspect of the present invention, see Fig.11 As shown, the present invention provides an electronic device 300 , which may be, for example, a mobile phone, a tablet computer, a phone watch, etc. The electronic device includes a camera device 200 and a housing 301 , and the camera device 200 is disposed in the housing 301 .

[0188] An optical imaging lens, a camera device, and an electronic device disclosed in the embodiments of the present invention are introduced in detail above. Specific examples are used herein to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand an optical imaging lens, a camera device, and an electronic device of the present invention and their core ideas. At the same time, for those skilled in the art, according to the ideas of the present invention, there may be changes in the specific implementation methods and application scopes. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. An optical imaging lens, characterized in that: There are seven lenses with refractive power, including a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens arranged in sequence from the object side to the image side; The first lens has positive refractive power, the object side surface is convex at the near optical axis, and the image side surface is concave at the near optical axis; The second lens has a refractive power, the object side surface is convex at the near optical axis, and the image side surface is concave at the near optical axis; The third lens has a refractive power, the object side surface is convex at the near optical axis, and the image side surface is concave at the near optical axis; The fourth lens has a refractive power, and the image side surface is concave at the near optical axis; The fifth lens has positive refractive power, and the image side surface is convex at the near optical axis; The sixth lens has a refractive power, the object side surface is a convex surface near the optical axis, and the image side surface is a concave surface near the optical axis; The seventh lens element has negative refractive power, the object side surface is convex at the near optical axis, and the image side surface is concave at the near optical axis; The optical imaging lens satisfies the condition: 0.28≤SD11*FNO / (ImgH*2)<0.35; Among them, SD11 is half of the optical effective aperture of the object side of the first lens, FNO is the aperture number of the optical imaging lens, and ImgH is the vertical distance from the farthest point of the image from the optical axis to the optical axis.

2. The optical imaging lens according to claim 1, wherein: The optical imaging lens satisfies the condition: 0.78≥f / TTL>0.7, wherein f is the total effective focal length of the optical imaging lens, and TTL is the distance from the object side surface of the first lens to the imaging surface of the optical imaging lens on the optical axis.

3. The optical imaging lens according to claim 1, wherein: The optical imaging lens satisfies the condition 2<f / ∑AT<3, wherein f is the total effective focal length of the optical imaging lens, and ∑AT is the sum of the air spaces on the optical axis between two adjacent lenses among the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, and the seventh lens.

4. The optical imaging lens according to claim 1, wherein: The optical imaging lens satisfies the condition: 2.17≤TTL / EPD<2.5, wherein TTL is the distance from the object side surface of the first lens to the imaging surface of the optical imaging lens on the optical axis, and EPD is the entrance pupil diameter of the optical imaging lens.

5. The optical imaging lens according to claim 1, wherein: The optical imaging lens satisfies the condition: 1.1≤f / ImgH<1.35, wherein f is the total effective focal length of the optical imaging lens.

6. The optical imaging lens according to claim 1, wherein: The optical imaging lens satisfies the condition: 1.64 mm ≤ SD11 / tan (Semi-FOV) < 2.4 mm, wherein tan (Semi-FOV) is the tangent value of half the maximum field of view angle of the optical imaging lens.

7. The optical imaging lens according to claim 1, wherein: The optical imaging lens satisfies the condition: 0.39≤SD11 / SD71<0.5, wherein SD72 is half of the optical effective aperture of the image side surface of the seventh lens.

8. The optical imaging lens according to claim 1, wherein: The optical imaging lens satisfies the condition: 0.1<BF / f≤0.15, wherein BF is the minimum axial distance from the image side surface of the seventh lens to the imaging surface of the optical imaging lens, and f is the total effective focal length of the optical imaging lens.

9. The optical imaging lens according to claim 1, wherein: The optical imaging lens satisfies the condition: 1.19≥|f12345 / f67|>0.5, wherein f12345 is the combined focal length of the first lens, the second lens, the third lens, the fourth lens and the fifth lens, and f67 is the combined focal length of the sixth lens and the seventh lens.

10. A camera device, characterized in that: The camera device comprises a photosensitive element and the optical imaging lens according to any one of claims 1 to 9, wherein the photosensitive element is arranged on the image side of the optical imaging lens.

11. An electronic device, characterized in that: The electronic device comprises a housing and the camera device according to claim 10, wherein the camera device is disposed in the housing.

Images