Camera lens, imaging device and electronic device

Abstract

The present invention discloses a camera lens, an imaging device, and an electronic device. The camera lens sequentially includes a diaphragm, a first lens with positive refractive power, a second lens with negative refractive power, a third lens with negative refractive power, a fourth lens with positive refractive power, and a fifth lens with negative refractive power from the object side to the image side. The image side surface of the first lens is concave at the optical axis and convex at the circumference. The image side surface of the fourth lens is convex at the optical axis. The image side surface of the fifth lens is concave at the optical axis, and at least one surface of the object side surface and the image side surface of the fifth lens has at least one inflection point. The camera lens satisfies the following relational expression: 1 < R4 / f < 1.5; where R4 is the radius of curvature of the image side surface of the second lens, and f is the effective focal length of the camera lens. The camera lens according to the embodiment of the present invention has a reasonable lens configuration and the camera lens satisfies the relational expression 1 < R4 / f < 1.5, which can avoid the generation of aberration, and at the same time can correct the high-order aberration generated by the second lens, improving the imaging quality.

Description

Technical Field

[0001] The present invention relates to optical imaging technology, and particularly to a camera lens, an image pickup device, and an electronic device. Background Art

[0002] Conventionally, most of the optical systems mounted on electronic products adopt a four-lens structure. However, due to the popularity of high-specification electronic devices such as Smart Phones and Tablet PCs, the rapid improvement in pixel and imaging quality of optical systems has led to the inability of known optical systems to meet higher-order photographic systems. Therefore, there is an urgent need for a photographic optical system with better imaging quality. Summary of the Invention

[0003] Embodiments of the present invention provide a camera lens, an image pickup device, and an electronic device.

[0004] The camera lens according to the embodiment of the present invention sequentially includes a diaphragm, a first lens with positive refractive power, a second lens with negative refractive power, a third lens with negative refractive power, a fourth lens with positive refractive power, and a fifth lens with negative refractive power from the object side to the image side. The image side surface of the first lens is concave at the optical axis and convex at the circumference. The image side surface of the fourth lens is convex at the optical axis, and both the object side surface and the image side surface of the fourth lens are aspherical surfaces. The image side surface of the fifth lens is concave at the optical axis, and both the object side surface and the image side surface of the fifth lens are aspherical surfaces, and at least one surface of the object side surface and the image side surface of the fifth lens has at least one inflection point. The camera lens satisfies the following relational expression: 1 < R4 / f < 1.5; where R4 is the radius of curvature of the image side surface of the second lens, and f is the effective focal length of the camera lens.

[0005] The camera lens according to the embodiment of the present invention has a reasonable lens configuration and satisfies the relational expression 1 < R4 / f < 1.5, which can avoid the generation of aberration and simultaneously correct the high-order aberration generated by the second lens, improving the imaging quality.

[0006] In some embodiments, the camera lens further satisfies the following conditional expression: 0.4 < |Ds| / D1 < 0.7; where Ds is the distance between the diaphragm and the object side surface of the first lens on the optical axis, and D1 is the central thickness of the first lens on the optical axis.

[0007] When the camera lens satisfies the relational expression 0.4 < |Ds| / D1 < 0.7, the relative position between the diaphragm and the first lens can be effectively controlled, the sensitivity of the camera lens can be reduced, which is beneficial to the assembly configuration of the first lens and the diaphragm.

[0008] In some embodiments, the camera lens further satisfies the following conditional expression: 1 < f1 / f4 < 1.8; where f1 is the focal length of the first lens and f4 is the focal length of the fourth lens.

[0009] When the camera lens satisfies the relational expression 1 < f1 / f4 < 1.8, the first lens can provide most of the positive refractive power, while the fourth lens shares part of the positive refractive power. The refractive power of the fourth lens is configured in a relatively balanced manner, which can avoid excessive spherical aberration of the camera lens and at the same time prevent the overall length of the camera lens from being too long.

[0010] In some embodiments, the camera lens further satisfies the following conditional expression: f3 / (f2 + f5) > 4; where f3 is the focal length of the third lens, f2 is the focal length of the second lens, and f5 is the focal length of the fifth lens.

[0011] When the camera lens satisfies the relational expression f3 / (f2 + f5) > 4, the third lens can provide the main negative refractive power to correct the chromatic aberration of the camera lens. The second lens and the fifth lens share part of the negative refractive power, which is beneficial to correcting astigmatism to improve the imaging quality.

[0012] In some embodiments, the camera lens further satisfies the following conditional expression: f / EPD < 2.2; where EPD is the entrance pupil diameter of the camera lens.

[0013] When the camera lens satisfies the relational expression f / EPD < 2.2, a larger aperture can be obtained, thereby increasing the amount of light entering the camera lens, which is beneficial to improving the imaging quality in low-light environments.

[0014] In some embodiments, the camera lens further satisfies the following conditional expression: 0.7 < (D12 + D23) / D34 < 1.3; where D12 is the distance between the first lens and the second lens on the optical axis, D23 is the distance between the second lens and the third lens on the optical axis, and D34 is the distance between the third lens and the fourth lens on the optical axis.

[0015] When the camera lens satisfies the relational expression 0.7 < (D12 + D23) / D34 < 1.3, the interval thicknesses of the first lens, the second lens, and the third lens are configured, which is beneficial to the assembly of each lens of the camera lens and can maintain the miniaturization of the camera lens while reducing the sensitivity of the camera lens.

[0016] In some embodiments, the camera lens further satisfies the following conditional expressions: |SAG41| ≤ 0.3, |SAG42| ≤ 0.8; where SAG41 is the horizontal displacement distance of the intersection of the object side surface of the fourth lens on the optical axis to the maximum effective radius of the object side surface of the fourth lens on the optical axis, and SAG42 is the horizontal displacement distance of the intersection of the image side surface of the fourth lens on the optical axis to the maximum effective radius of the image side surface of the fourth lens on the optical axis.

[0017] When the camera lens satisfies the relational expressions |SAG41| ≤ 0.3 and |SAG42| ≤ 0.8, it can ensure that the object side surface and the image side surface of the fourth lens will not be overly curved, are easy to form, thereby improving the production yield, and can effectively correct the astigmatism of the camera lens.

[0018] In some embodiments, the camera lens further satisfies the following conditional expression: 0.3 < Yc52 / DT52 < 0.7; where on the image side surface of the fifth lens, except for the intersection with the optical axis, for any plane perpendicular to the optical axis on the image side surface of the fifth lens, at the tangent point of the plane and the image side surface of the fifth lens, Yc52 is the vertical distance from the tangent point to the optical axis, and DT52 is the effective radius of the image side surface of the fifth lens.

[0019] When the camera lens satisfies the relational expression 0.3 < Yc52 / DT52 < 0.7, it can reduce the forming difficulty of the fifth lens, correct the off-axis field aberration, and at the same time can effectively suppress the angle of the off-axis field incident on the photosensitive element, which is beneficial to improving the imaging quality.

[0020] The image pickup device according to the embodiment of the present invention includes the camera lens and the photosensitive element described in any one of the above embodiments. The photosensitive element is disposed on the image side of the camera lens.

[0021] The image pickup device according to the embodiment of the present invention has a reasonable lens configuration and the camera lens satisfies the relational expression 1 < R4 / f < 1.5, which can avoid generating aberrations, and at the same time can correct the high-order aberrations generated by the second lens, improving the imaging quality.

[0022] The electronic device according to the embodiment of the present invention includes a housing and the image pickup device described in the above embodiment. The image pickup device is mounted on the housing.

[0023] The electronic device according to the embodiment of the present invention has a reasonable lens configuration and the camera lens satisfies the relational expression 1 < R4 / f < 1.5, which can avoid generating aberrations, and at the same time can correct the high-order aberrations generated by the second lens, improving the imaging quality.

[0024] The additional aspects and advantages of the embodiments of the present invention will be partially given in the following description, partially become apparent from the following description, or be understood through the practice of the present invention. Description of the Drawings

[0025] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0026] Figure 1 is a schematic structural diagram of a camera lens according to a first embodiment of the present invention;

[0027] Figure 2 is a longitudinal aberration diagram of the imaging lens in the first embodiment (mm);

[0028] Figure 3 is a graph of field curvature of the camera lens in the first embodiment (mm);

[0029] Figure 4 is a distortion diagram (%) of the camera lens in the first embodiment;

[0030] Figure 5 is a schematic structural diagram of a camera lens according to a second embodiment of the present invention;

[0031] Figure 6 is a longitudinal aberration diagram of the imaging lens in the second embodiment (mm);

[0032] Figure 7 is a graph of field curvature of the camera lens in the second embodiment (mm);

[0033] Figure 8 is a distortion diagram (%) of the camera lens in the second embodiment;

[0034] Fig. 9 is a schematic structural diagram of a camera lens according to a third embodiment of the present invention;

[0035] Fig.10 is a longitudinal aberration diagram of the camera lens in the third embodiment (mm);

[0036] Fig.11 is a graph of field curvature of the camera lens in the third embodiment (mm);

[0037] Fig.12 is a distortion diagram (%) of the camera lens in the third embodiment;

[0038] Fig.13 is a schematic structural diagram of a camera lens according to a fourth embodiment of the present invention;

[0039] Fig.14 is a longitudinal aberration diagram of the imaging lens in the fourth embodiment (mm);

[0040] Fig.15 is a graph of field curvature of the imaging lens in the fourth embodiment (mm);

[0041] Fig.16 is a distortion diagram (%) of the camera lens in the fourth embodiment;

[0042] Fig.17 is a schematic structural diagram of a camera lens according to a fifth embodiment of the present invention;

[0043] Fig.18 is a longitudinal aberration diagram of the imaging lens in the fifth embodiment (mm);

[0044] Fig.19 is a graph of field curvature of the imaging lens in the fifth embodiment (mm);

[0045] Fig. 20 is a distortion diagram (%) of the camera lens in the fifth embodiment;

[0046] Fig.21 is a schematic structural diagram of an imaging device according to an embodiment of the present invention; and

[0047] Fig. 22 It is a schematic structural diagram of an electronic device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0048] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0049] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0050] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or mutual communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0051] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0052] The disclosure below provides many different embodiments or examples to realize different structures of the present invention. In order to simplify the disclosure of the present invention, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present invention. In addition, the present invention can repeat reference numbers and / or reference letters in different examples, and this repetition is for the purpose of simplicity and clarity, which itself does not indicate the relationship between the various embodiments and / or settings discussed. In addition, the present invention provides various specific examples of processes and materials, but those of ordinary skill in the art can be aware of the application of other processes and / or the use of other materials.

[0053] Please also read Figure 1 , Figure 5 , Fig. 9 , Fig.13 and Fig.17 The camera lens 10 of the embodiment of the present invention includes, from the object side to the image side, an aperture STO, a first lens L1 with positive refractive power, a second lens L2 with negative refractive power, a third lens L3 with negative refractive power, a fourth lens L4 with positive refractive power, and a fifth lens L5 with negative refractive power.

[0054] The first lens L1 has an object side S1 and an image side S2. The image side S2 of the first lens L1 is concave at the optical axis and convex at the circumference. The second lens L2 has an object side S3 and an image side S4. The third lens L3 has an object side S5 and an image side S6. The fourth lens L4 has an object side S7 and an image side S8. The image side S8 of the fourth lens L4 is convex at the optical axis. Both the object side S7 and the image side S8 of the fourth lens L4 are aspherical surfaces. The fifth lens L5 has an object side S9 and an image side S10. The image side S10 of the fifth lens L5 is concave at the optical axis. Both the object side S9 and the image side S10 of the fifth lens L5 are aspherical surfaces, and at least one surface of the object side S9 and the image side S10 of the fifth lens L5 has at least one inflection point. For example, the object side S9 includes one, two or three inflection points; for another example, the image side S10 includes one, two or three inflection points; for still another example, the object side S9 includes one, two or three inflection points while the image side S10 includes one, two or three inflection points. Of course, the number of inflection points is not limited to one, two or three mentioned above, and can also be other numbers such as five, six, etc.

[0055] The imaging lens 10 of the present invention embodiment satisfies the following relationship: 1 < R4 / f < 1.5; where, R4 is the radius of curvature of the image side S4 of the second lens L2, and f is the effective focal length of the imaging lens 10. That is to say, R4 / f can be any value within the interval (1, 1.5). For example, this value can be 1.112, 1.146, 1.152, 1.215, 1.230, 1.255, 1.288, 1.355, and so on.

[0056] The imaging lens 10 of the embodiment of the present invention has a reasonable lens configuration and the imaging lens 10 satisfies the relationship 1 < R4 / f < 1.5, which can avoid generating aberrations, and at the same time can correct the high-order aberrations generated by the second lens L2, improving the imaging quality.

[0057] In some embodiments, the imaging lens 10 satisfies the following relationship: 0.4 < |Ds| / D1 < 0.7; where, Ds is the distance between the diaphragm STO and the object side S1 of the first lens L1 on the optical axis, and D1 is the central thickness of the first lens L1 on the optical axis. That is to say, |Ds| / D1 can be any value within the interval (0.4, 0.7). For example, this value can be 0.463, 0.533, 0.562, 0.599, 0.612, 0.695, and so on.

[0058] When the imaging lens 10 satisfies the relationship 0.4 < |Ds| / D1 < 0.7, the relative position between the diaphragm STO and the first lens L1 can be effectively controlled, reducing the sensitivity of the imaging lens 10, which is beneficial to the assembly configuration of the first lens L1 and the diaphragm STO.

[0059] In some embodiments, the imaging lens 10 satisfies the following relationship: 1 < f1 / f4 < 1.8; where f1 is the focal length of the first lens L1 and f4 is the focal length of the fourth lens L4. That is to say, f1 / f4 can be any value within the interval (1, 1.8). For example, this value can be 1.155, 1.265, 1.432, 1.512, 1.572, 1.581, 1.678, 1.730, 1.799, etc.

[0060] When the imaging lens 10 satisfies the relationship 1 < f1 / f4 < 1.8, the first lens L1 can provide most of the positive refractive power, while the fourth lens L4 shares part of the positive refractive power. The refractive power of the fourth lens L4 is configured in a relatively balanced manner, which can avoid excessive spherical aberration of the imaging lens 10 and at the same time prevent the overall length of the imaging lens 10 from being too long.

[0061] In some embodiments, the imaging lens 10 satisfies the following relationship: f3 / (f2 + f5) > 4; where f3 is the focal length of the third lens L3, f2 is the focal length of the second lens L2, and f5 is the focal length of the fifth lens L5. That is to say, f3 / (f2 + f5) can be any value greater than 4. For example, this value can be 4.517, 5.454, 6.105, 7.145, 7.549, 8.256, 11.123, 17.891, etc.

[0062] When the imaging lens 10 satisfies the relationship f3 / (f2 + f5) > 4, the third lens L3 can provide the main negative refractive power to correct the chromatic aberration of the imaging lens 10, and the second lens L2 and the fifth lens L5 share part of the negative refractive power, which is beneficial to correcting astigmatism to improve the imaging quality.

[0063] In some embodiments, the imaging lens 10 satisfies the following relationship: f / EPD < 2.2; where EPD is the entrance pupil diameter of the imaging lens 10. That is to say, f / EPD can be any value less than 2.2 and greater than or equal to 1.7. For example, this value can be 1.70, 1.83, 1.85, 1.95, 2.00, 2.15, etc.

[0064] When the imaging lens 10 satisfies the relationship f / EPD < 2.2, a larger aperture can be obtained, thereby increasing the light input of the imaging lens 10, which is beneficial to improving the imaging quality in low-light environments.

[0065] In some embodiments, the camera lens 10 satisfies the following relationship: 0.7<(D12+D23) / D34<1.3; wherein D12 is the distance between the first lens L1 and the second lens L2 on the optical axis, D23 is the distance between the second lens L2 and the third lens L3 on the optical axis, and D34 is the distance between the third lens L3 and the fourth lens L4 on the optical axis. That is, (D12+D23) / D34 can be any value between the interval (0.7, 1.3), for example, the value can be 0.751, 0.831, 0.898, 0.921, 0.998, 1.019, 1.121, 1.212, etc.

[0066] When the camera lens 10 satisfies the relationship 0.7<(D12+D23) / D34<1.3, the spacing thickness configuration of the first lens L1, the second lens L2 and the third lens L3 is beneficial to the assembly of the lenses of the camera lens 10, and can reduce the sensitivity of the camera lens 10 while maintaining the miniaturization of the camera lens 10.

[0067] In some embodiments, the camera lens 10 satisfies the following conditional formula: |SAG41|≤0.3, |SAG42|≤0.8; wherein SAG41 is a horizontal displacement distance from the intersection of the object side surface S7 of the fourth lens L4 on the optical axis to the maximum effective radius of the object side surface S7 of the fourth lens L4 on the optical axis, and SAG42 is a horizontal displacement distance from the intersection of the image side surface S8 of the fourth lens L4 on the optical axis to the maximum effective radius of the image side surface S8 of the fourth lens L4 on the optical axis. That is to say, |SAG41| can be any value less than or equal to 0.3, and |SAG42| can be any value less than or equal to 0.8. For example, |SAG41| can be 0.012, 0.222, 0.240, 0.261, 0.277, 0.289, etc., and |SAG42| can be 0.012, 0.222, 0.240, 0.261, 0.277, 0.289, 0.350, 0.441, 0.602, 0.643, 0.687, 0.775, etc.

[0068] When the camera lens 10 satisfies the relationship |SAG41|≤0.3 and |SAG42|≤0.8, it can ensure that the object side surface S7 and the image side surface S8 of the fourth lens L4 will not be too curved, and it is easy to form, thereby improving the production yield, and can effectively correct the astigmatism of the camera lens 10.

[0069] In some embodiments, the camera lens 10 further includes a filter L6. The filter L6 is disposed between the fifth lens L5 and the imaging surface S13. In an embodiment of the present invention, the filter L6 is an infrared filter L6. When the camera lens 10 is used for imaging, the light emitted or reflected by the object enters the camera lens 10 from the object side, and sequentially passes through the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5 and the infrared filter L6, and finally converges on the imaging surface S13.

[0070] In some embodiments, the aperture STO may be an aperture aperture or a field aperture. The embodiments of the present invention are described by taking the aperture STO as an example. The aperture STO may be disposed between the object OBJ and the first lens L1, or on the surface of any one of the lenses, or between any two lenses, or between the fifth lens L5 and the infrared filter L6. In the first to fifth embodiments of the embodiments of the present invention, the aperture STO is disposed between the object OBJ and the first lens L1, which can better control the amount of light entering and improve the imaging effect.

[0071] In some embodiments, the first lens L1 to the fifth lens L5 are plastic lenses or plastic lenses. In the first embodiment to the fifth embodiment of the present invention, the first lens L1 to the fifth lens L5 are all plastic lenses. In this way, the camera lens 10 can achieve ultra-thinness and low cost while correcting aberrations and solving temperature drift problems through reasonable configuration of lens materials.

[0072] In some embodiments, at least one surface of the first lens L1 to the fifth lens L5 in the camera lens 10 is an aspherical surface. For example, in the first embodiment to the fifth embodiment, the object side surface and the image side surface of the first lens L1 to the fifth lens L5 are both aspherical surfaces. The surface shape of the aspherical surface is determined by the following formula: Among them, Z is the longitudinal distance from any point on the aspheric surface to the surface vertex, r is the distance from any point on the aspheric surface to the optical axis, c is the vertex curvature (the inverse of the radius of curvature), k is the cone constant, and Ai is the correction coefficient of the i-th order aspheric surface.

[0073] In this way, the camera lens 10 can effectively reduce the total length of the camera lens 10 by adjusting the curvature radius and aspheric coefficient of each lens surface, and can effectively correct aberrations to improve imaging quality.

[0074] First embodiment

[0075] See also Figures 1 to 4 , from the object side to the image side, the camera lens 10 of the first embodiment includes an aperture STO, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5 and an infrared filter L6 in sequence.

[0076] The first lens L1 has positive refractive power and is made of plastic. Its object side S1 is convex, and its image side S2 is concave at the optical axis and convex at the circumference, and both are aspherical. The second lens L2 has negative refractive power and is made of plastic. Its object side S3 is convex, and its image side S4 is concave, and both are aspherical. The third lens L3 has negative refractive power and is made of plastic. Its object side S5 is concave, and its image side S6 is convex, and both are aspherical. The fourth lens L4 has positive refractive power and is made of plastic. Its object side S7 is convex at the optical axis and concave at the circumference, and its image side S8 is convex, and both are aspherical. The fifth lens L5 has negative refractive power and is made of plastic. Its object side S9 is concave at the optical axis and convex at the circumference, and its image side S10 is concave at the optical axis and convex at the circumference, and both are aspherical.

[0077] The aperture number FNO of the imaging lens 10 is 1.83.

[0078] The infrared filter L6 is made of glass, and is disposed between the fifth lens L5 and the imaging surface S13 without affecting the focal length of the camera lens 10 .

[0079] In the first embodiment, the effective focal length of the camera lens 10 is f=3.62 mm, and the field of view FOV of the camera lens 10 is 77.0 degrees. The camera lens 10 also satisfies the following conditions: R4 / f=1.215; |Ds| / D1=0.599; f1 / f4=1.678; f3 / (f2+f5)=7.549; f / EPD=1.83; (D12+D23) / D34=0.898; |SAG41|=0.222 mm; |SAG42|=0.643 mm; Yc52 / DT52=0.497. The camera lens 10 satisfies the conditions in the following table:

[0080] Table 1

[0081]

[0082] Table 2

[0083]

[0084]

[0085] Second embodiment

[0086] See also Figures 5 to 8 , from the object side to the image side, the camera lens 10 of the first embodiment includes an aperture STO, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5 and an infrared filter L6 in sequence.

[0087] The first lens L1 has positive refractive power and is made of plastic. Its object side S1 is convex, and its image side S2 is concave at the optical axis and convex at the circumference, and both are aspherical. The second lens L2 has negative refractive power and is made of plastic. Its object side S3 is concave at the optical axis and convex at the circumference, and its image side S4 is concave, and both are aspherical. The third lens L3 has negative refractive power and is made of plastic. Its object side S5 is concave, and its image side S6 is concave at the optical axis and convex at the circumference, and both are aspherical. The fourth lens L4 has positive refractive power and is made of plastic. Its object side S7 is concave, and its image side S8 is convex, and both are aspherical. The fifth lens L5 has negative refractive power and is made of plastic. Its object side S9 is concave, and its image side S10 is concave at the optical axis and convex at the circumference, and both are aspherical.

[0088] The aperture number FNO of the imaging lens 10 is 1.85.

[0089] The infrared filter L6 is made of glass, and is disposed between the fifth lens L5 and the imaging surface S13 without affecting the focal length of the camera lens 10 .

[0090] The camera lens 10 meets the conditions in the following table:

[0091] Table 3

[0092]

[0093] Table 4

[0094]

[0095]

[0096] According to Table 3 and Table 4, the following data can be obtained:

[0097] f(mm) 3.66 f3 / (f2+f5) 17.891 FNO 1.85 f / EPD 1.85 FOV(degree) 76.2 (D12+D23) / D34 0.831 R4 / f 1.230 |SAG41|(mm) 0.240 |Ds| / D1 0.562 |SAG42|(mm) 0.602 f1 / f4 1.572 Yc52 / DT52 0.430

[0098] Third embodiment

[0099] See also Figures 9 to 12 , from the object side to the image side, the camera lens 10 of the first embodiment includes an aperture STO, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5 and an infrared filter L6 in sequence.

[0100] The first lens L1 has positive refractive power and is made of plastic. Its object side S1 is convex, and its image side S2 is concave at the optical axis and convex at the circumference, and both are aspherical. The second lens L2 has negative refractive power and is made of plastic. Its object side S3 is convex, and its image side S4 is concave, and both are aspherical. The third lens L3 has negative refractive power and is made of plastic. Its object side S5 is convex at the optical axis and concave at the circumference, and its image side S6 is concave at the optical axis and convex at the circumference, and both are aspherical. The fourth lens L4 has positive refractive power and is made of plastic. Its object side S7 is concave, and its image side S8 is convex, and both are aspherical. The fifth lens L5 has negative refractive power and is made of plastic. Its object-side surface S9 is concave at the optical axis and convex at the circumference, and its image-side surface S10 is concave at the optical axis and convex at the circumference, and both are aspherical.

[0101] The aperture number FNO of the imaging lens 10 is 1.70.

[0102] The infrared filter L6 is made of glass, and is disposed between the fifth lens L5 and the imaging surface S13 without affecting the focal length of the camera lens 10 .

[0103] The camera lens 10 meets the conditions in the following table:

[0104] Table 5

[0105]

[0106] Table 6

[0107]

[0108]

[0109] According to Table 5 and Table 6, the following data can be obtained:

[0110] f(mm) 3.66 f3 / (f2+f5) 7.145 FNO 1.70 f / EPD 1.70 FOV(degree) 75.8 (D12+D23) / D34 1.019 R4 / f 1.146 |SAG41|(mm) 0.261 |Ds| / D1 0.612 |SAG42|(mm) 0.775 f1 / f4 1.581 Yc52 / DT52 0.496

[0111] Fourth embodiment

[0112] The imaging lens 10 of the first embodiment includes, from the object side to the image side, an aperture STO, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, and an infrared filter L6 in order.

[0113] The first lens L1 has positive refractive power and is made of plastic. Its object side S1 is convex, and its image side S2 is concave at the optical axis and convex at the circumference, and both are aspherical. The second lens L2 has negative refractive power and is made of plastic. Its object side S3 is convex, and its image side S4 is concave, and both are aspherical. The third lens L3 has negative refractive power and is made of plastic. Its object side S5 is convex at the optical axis and concave at the circumference, and its image side S6 is concave at the optical axis and convex at the circumference, and both are aspherical. The fourth lens L4 has positive refractive power and is made of plastic. Its object side S7 is concave, and its image side S8 is convex, and both are aspherical. The fifth lens L5 has negative refractive power and is made of plastic. Its object-side surface S9 is concave at the optical axis and convex at the circumference, and its image-side surface S10 is concave at the optical axis and convex at the circumference, and both are aspherical.

[0114] The imaging lens 10 has an aperture number FNO=2.00.

[0115] The infrared filter L6 is made of glass, and is disposed between the fifth lens L5 and the imaging surface S13 without affecting the focal length of the camera lens 10 .

[0116] The camera lens 10 meets the conditions in the following table:

[0117] Table 7

[0118]

[0119]

[0120] Table 8

[0121]

[0122] According to Table 7 and Table 8, the following data can be obtained:

[0123] f(mm) 3.44 f3 / (f2+f5) 4.517 FNO 2.00 f / EPD 2.00 FOV(degree) 80.0 (D12+D23) / D34 0.921 R4 / f 1.288 |SAG41|(mm) 0.277 |Ds| / D1 0.463 |SAG42|(mm) 0.687 f1 / f4 1.512 Yc52 / DT52 0.527

[0124] Fifth embodiment

[0125] See also Figures 17 to 20 , from the object side to the image side, the camera lens 10 of the first embodiment includes an aperture STO, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5 and an infrared filter L6 in sequence.

[0126] The first lens L1 has positive refractive power and is made of plastic. Its object side surface S1 is convex, and its image side surface S2 is concave at the optical axis and convex at the circumference, and both are aspherical. The second lens L2 has negative refractive power and is made of plastic. Its object side surface S3 is convex, and its image side surface S4 is concave, and both are aspherical. The third lens L3 has negative refractive power and is made of plastic. Its object side surface S5 is convex at the optical axis and concave at the circumference, and its image side surface S6 is concave at the optical axis and convex at the circumference, and both are aspherical. The fourth lens L4 has positive refractive power and is made of plastic. Its object side surface S7 is concave at the optical axis and convex at the circumference, and its image side surface S8 is convex at the optical axis and concave at the circumference, and both are aspherical. The fifth lens L5 has negative refractive power and is made of plastic. Its object-side surface S9 is convex at the optical axis and concave at the circumference, and its image-side surface S10 is concave at the optical axis and convex at the circumference, and both are aspherical.

[0127] The aperture number FNO of the imaging lens 10 is 1.85.

[0128] The infrared filter L6 is made of glass, and is disposed between the fifth lens L5 and the imaging surface S13 without affecting the focal length of the camera lens 10 .

[0129] The camera lens 10 meets the conditions in the following table:

[0130] Table 9

[0131]

[0132] Table 10

[0133]

[0134]

[0135] According to Table 9 and Table 10, the following data can be obtained:

[0136] f(mm) 3.20 f3 / (f2+f5) 6.105 FNO 1.85 f / EPD 1.85 FOV(degree) 70.0 (D12+D23) / D34 1.212 R4 / f 1.112 |SAG41|(mm) 0.012 |Ds| / D1 0.533 |SAG42|(mm) 0.441 f1 / f4 1.730 Yc52 / DT52 0.579

[0137] See also Fig.21 The image capturing device 100 of the embodiment of the present invention comprises the camera lens 10 of any one of the above embodiments and a photosensitive element 20. The photosensitive element 20 is disposed on the image side of the camera lens 10.

[0138] Specifically, the photosensitive element 20 may be a complementary metal oxide semiconductor (CMOS) image sensor or a charge-coupled device (CCD) image sensor.

[0139] The imaging device 100 according to the embodiment of the present invention has a reasonable lens configuration, and the imaging lens 10 satisfies the relational expression 1 < R4 / f < 1.5, which can avoid the generation of aberration. At the same time, the high-order aberration generated by the second lens can be corrected, improving the imaging quality.

[0140] Please refer to Fig. 22 , the electronic device 1000 includes a housing 200 and the imaging device 100 according to the above embodiment. The imaging device 100 is mounted on the housing 200 to acquire images.

[0141] The electronic device 1000 according to the embodiment of the present invention has a reasonable lens configuration, and the imaging lens satisfies the relational expression 1 < R4 / f < 1.5, which can avoid the generation of aberration. At the same time, the high-order aberration generated by the second lens can be corrected, improving the imaging quality.

[0142] The electronic device 100 according to the embodiment of the present invention includes, but is not limited to, information terminal devices such as smart phones, mobile phones, personal digital assistants (PDAs), game consoles, personal computers (PCs), cameras, smart watches, tablet computers, etc., or household electrical appliances with a photographing function.

[0143] In the description of this specification, the descriptions with reference to terms such as "certain embodiments", "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in connection with the said embodiments or examples are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0144] In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of the said features. In the description of the present invention, the meaning of "a plurality" is at least two, for example two, three, etc., unless otherwise clearly and specifically defined.

[0145] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention, and the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A camera lens, characterized in that: There are five lenses with refractive power, including: Aperture; A first lens having positive refractive power, wherein the image side surface of the first lens is concave at the optical axis and convex at the circumference; a second lens having negative refractive power, wherein the image side surface of the second lens is concave at the optical axis; A third lens element having negative refractive power; a fourth lens having positive refractive power, wherein the image side surface of the fourth lens is convex at the optical axis, and the object side surface and the image side surface of the fourth lens are both aspherical surfaces; and a fifth lens having negative refractive power, wherein the image side surface of the fifth lens is concave at the optical axis, the object side surface and the image side surface of the fifth lens are both aspherical surfaces, and at least one surface of the object side surface and the image side surface of the fifth lens has at least one inflection point; The camera lens satisfies the following conditional formula: 1 <R4 / f<1.5; Wherein, R4 is the curvature radius of the image side surface of the second lens, and f is the effective focal length of the camera lens; The camera lens also satisfies the following conditional formula: 0.3 <Yc52 / DT52<0.7; Among them, on the image side surface of the fifth lens, except for the intersection with the optical axis, the image side surface of the fifth lens is perpendicular to the optical axis and forms a tangent point with the image side surface of the fifth lens, Yc52 is the vertical distance between the tangent point and the optical axis, and DT52 is the effective radius of the image side surface of the fifth lens.

2. The imaging lens according to claim 1, wherein: The camera lens also satisfies the following conditional formula: 0.4<|Ds| / D1<0.7; Wherein, Ds is the distance between the aperture and the object side surface of the first lens on the optical axis, and D1 is the center thickness of the first lens on the optical axis.

3. The imaging lens according to claim 1, wherein: The camera lens also satisfies the following conditional formula: 1 <f1 / f4<1.8; Wherein, f1 is the focal length of the first lens, and f4 is the focal length of the fourth lens.

4. The imaging lens according to claim 1, wherein: The camera lens also satisfies the following conditional formula: f3 / (f2+f5)>4; Among them, f3 is the focal length of the third lens, f2 is the focal length of the second lens, and f5 is the focal length of the fifth lens.

5. The imaging lens according to claim 1, wherein: The camera lens also satisfies the following conditional formula: 1.7≤f / EPD<2.2; Wherein, EPD is the entrance pupil diameter of the camera lens.

6. The imaging lens according to claim 1, wherein: The camera lens also satisfies the following conditional formula: 0.7<(D12+D23) / D34<1.3; Wherein, D12 is the distance between the first lens and the second lens and the optical axis, D23 is the distance between the second lens and the third lens and the optical axis, and D34 is the distance between the third lens and the fourth lens and the optical axis.

7. The imaging lens according to claim 1, wherein: The camera lens also satisfies the following conditional formula: |SAG41|≤0.3, |SAG42|≤0.8; Among them, SAG41 is the horizontal displacement distance from the intersection of the object side surface of the fourth lens on the optical axis to the maximum effective radius of the object side surface of the fourth lens on the optical axis, and SAG42 is the horizontal displacement distance from the intersection of the image side surface of the fourth lens on the optical axis to the maximum effective radius of the image side surface of the fourth lens on the optical axis.

8. An imaging device, characterized in that: The imaging device comprises: The imaging lens according to any one of claims 1 to 7; and A photosensitive element is arranged on the image side of the camera lens.

9. An electronic device, characterized in that: The electronic device comprises: a housing; and The imaging device according to claim 8, wherein the imaging device is mounted on the housing.

Images