Optical imaging lens

Abstract

The present application discloses an optical imaging lens, which includes, in order from the object side to the image side along the optical axis: a first lens with negative optical power; a prism including an incident surface, a reflection surface and an exit surface, wherein the angle between the reflection surface and the optical axis is 45°; an aperture; a second lens with positive optical power; a third lens with optical power; a fourth lens with positive optical power; and a fifth lens with negative optical power.

Description

Technical Field

[0001] The present application relates to the field of optical elements, and in particular to an optical imaging lens including five lenses and a prism. Background Art

[0002] In the current mobile phone market, ultra-thin body is one of the selling points of mobile phones. Except for special mobile phones, it is difficult to find mobile phone models with thicker body among common mobile phones. On the other hand, as users' requirements for photo quality are getting higher and higher, ultra-high image quality has become a configuration that mobile phones should have.

[0003] In order to meet the high requirements for imaging quality, most of the mobile phones sold on the market recently have a 3+1 lens configuration including a large image lens, a wide-angle lens, a telephoto lens and a TOF camera. Among them, most telephoto lenses have 5x, 10x, and 15x optical zoom capabilities. If a conventional coaxial telephoto solution is used, the total optical length (TTL) of the lens will be longer to meet the long focal length of the telephoto lens, which may make the mobile phone unable to meet the ultra-thin characteristics. Therefore, an optical imaging lens with a prism folding function came into being, which can effectively avoid the length of the incident direction of the mobile phone lens light. Summary of the invention

[0004] The present application provides an optical imaging lens applicable to portable electronic products, which can at least solve or partially solve at least one of the above-mentioned shortcomings in the prior art, such as an optical imaging lens with ultra-large field of view and ultra-thin characteristics.

[0005] One aspect of the present application provides an optical imaging lens, which may include, in order from the object side to the image side along the optical axis: a first lens with negative optical power; a prism including an incident surface, a reflection surface and an exit surface, wherein the angle between the reflection surface and the optical axis is 45°; an aperture; a second lens with positive optical power; a third lens with optical power; a fourth lens with positive optical power; and a fifth lens with negative optical power.

[0006] In one embodiment, the maximum field of view FOV of the optical imaging lens may satisfy: FOV>92.0°.

[0007] In one embodiment, the effective focal length f2 of the second lens and the combined focal length f34 of the third lens and the fourth lens may satisfy: -2.50<f34 / f2<-0.50.

[0008] In one embodiment, the effective focal length f1 of the first lens and the total effective focal length f of the optical imaging lens may satisfy: -5.50<f1 / f<-1.50.

[0009] In one embodiment, the effective focal length f4 of the fourth lens and the curvature radius R10 of the image-side surface of the fifth lens may satisfy: 1.50<f4 / R10<4.00.

[0010] In one embodiment, a curvature radius R1 of the object-side surface of the first lens and a curvature radius R8 of the image-side surface of the fourth lens may satisfy: 1.00<(R1+R8) / (R1-R8)<2.50.

[0011] In one embodiment, a curvature radius R5 of the object-side surface of the third lens and a curvature radius R6 of the image-side surface of the third lens may satisfy: 1.00<R5 / R6<2.00.

[0012] In one embodiment, a center thickness CT2 of the second lens on the optical axis and a center thickness CT3 of the third lens on the optical axis may satisfy: 1.50<CT2 / CT3<4.50.

[0013] In one embodiment, the on-axis distance SAG11 from the intersection of the object side surface of the first lens and the optical axis to the vertex of the effective radius of the object side surface of the first lens and the on-axis distance SAG12 from the intersection of the image side surface of the first lens and the optical axis to the vertex of the effective radius of the image side surface of the first lens may satisfy: 1.50<(SAG11+SAG12) / (SAG12-SAG11)<3.00.

[0014] In one embodiment, the maximum effective radius DT11 of the object-side surface of the first lens and the maximum effective radius DT12 of the image-side surface of the first lens may satisfy: 6.00<(DT11+DT12) / (DT11-DT12)<10.50.

[0015] In one embodiment, the maximum effective radius DT51 of the object-side surface of the fifth lens and the maximum effective radius DT52 of the image-side surface of the fifth lens may satisfy: 4.00<(DT51+DT52) / (DT52-DT51)<11.00.

[0016] The optical imaging lens provided in the present application includes a prism and a plurality of lenses, such as the first lens to the fifth lens. By setting the prism, it is possible to ensure that the incident direction of light forms a 90-degree angle with the arrangement direction of the multiple lenses, thereby reducing the size of the optical imaging lens in the incident direction of light (i.e., the size in the thickness direction of the device). At the same time, by optimizing the focal length and surface shape of each lens and increasing the maximum field of view of the optical imaging lens, the optical imaging lens has good light converging ability and is suitable for more models of mobile phone camera modules. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Other features, purposes and advantages of the present application will become more apparent through the following detailed description of non-limiting embodiments in conjunction with the accompanying drawings. In the accompanying drawings:

[0018] Figure 1 A schematic structural diagram of an optical imaging lens according to Embodiment 1 of the present application is shown;

[0019] FIG. 2A to FIG. 2C The astigmatism curve, distortion curve and relative illumination curve of the optical imaging lens of Example 1 are respectively shown;

[0020] Figure 3 A schematic structural diagram of an optical imaging lens according to Embodiment 2 of the present application is shown;

[0021] FIG. 4A to FIG. 4C The astigmatism curve, distortion curve and relative illumination curve of the optical imaging lens of Example 2 are respectively shown;

[0022] Figure 5 A schematic structural diagram of an optical imaging lens according to Embodiment 3 of the present application is shown;

[0023] FIG. 6A to FIG. 6C The astigmatism curve, distortion curve and relative illumination curve of the optical imaging lens of Example 3 are respectively shown;

[0024] Figure 7 A schematic structural diagram of an optical imaging lens according to Embodiment 4 of the present application is shown;

[0025] FIG. 8A to FIG. 8C The astigmatism curve, distortion curve and relative illumination curve of the optical imaging lens of Example 4 are respectively shown;

[0026] Fig. 9 A schematic structural diagram of an optical imaging lens according to Embodiment 5 of the present application is shown;

[0027] FIG. 10A to FIG. 10C The astigmatism curve, distortion curve and relative illumination curve of the optical imaging lens of Example 5 are respectively shown;

[0028] Fig.11 A schematic structural diagram of an optical imaging lens according to Embodiment 6 of the present application is shown;

[0029] FIG. 12A to FIG. 12C The astigmatism curve, distortion curve and relative illumination curve of the optical imaging lens of Example 6 are respectively shown. DETAILED DESCRIPTION

[0030] In order to better understand the present application, a more detailed description will be made of various aspects of the present application with reference to the accompanying drawings. It should be understood that these detailed descriptions are only descriptions of exemplary embodiments of the present application, and are not intended to limit the scope of the present application in any way. Throughout the specification, the same reference numerals refer to the same elements. The expression "and / or" includes any and all combinations of one or more of the associated listed items.

[0031] It should be noted that in this specification, the expressions of first, second, third, etc. are only used to distinguish one feature from another feature, and do not represent any limitation on the features. Therefore, without departing from the teaching of the present application, the first lens discussed below may also be referred to as the second lens or the third lens.

[0032] In the drawings, the thickness, size and shape of the lenses have been slightly exaggerated for ease of explanation. Specifically, the shapes of the spherical or aspherical surfaces shown in the drawings are shown by way of example. That is, the shapes of the spherical or aspherical surfaces are not limited to the shapes of the spherical or aspherical surfaces shown in the drawings. The drawings are only examples and are not drawn strictly to scale.

[0033] In this article, the paraxial region refers to the region near the optical axis. If the lens surface is convex and the position of the convex surface is not defined, it means that the lens surface is convex at least in the paraxial region; if the lens surface is concave and the position of the concave surface is not defined, it means that the lens surface is concave at least in the paraxial region. The surface of each lens closest to the object is called the object side of the lens, and the surface of each lens closest to the imaging plane is called the image side of the lens.

[0034] It should also be understood that the terms "comprises", "including", "having", "includes" and / or "comprising", when used in this specification, indicate the presence of the stated features, elements and / or components, but do not exclude the presence or addition of one or more other features, elements, components and / or combinations thereof. In addition, when expressions such as "at least one of..." appear after a list of listed features, they modify the entire listed features rather than modifying the individual elements in the list. In addition, when describing embodiments of the present application, "may" is used to mean "one or more embodiments of the present application". And, the term "exemplary" is intended to refer to an example or illustration.

[0035] Unless otherwise defined, all terms (including technical terms and scientific terms) used in this article have the same meaning as commonly understood by ordinary technicians in the field to which this application belongs. It should also be understood that terms (such as terms defined in commonly used dictionaries) should be interpreted as having the same meaning as their meaning in the context of the relevant technology, and will not be interpreted in an idealized or overly formal sense unless explicitly defined in this article.

[0036] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0037] The features, principles and other aspects of the present application are described in detail below.

[0038] The optical imaging lens according to the exemplary embodiment of the present application may include: a first lens, a prism, a second lens, a third lens, a fourth lens and a fifth lens in order from the object side to the image side along the optical axis, wherein the prism is arranged so that the angle between its reflection surface and the optical axis is 45°. There may be air gaps between each adjacent lens and between the prism and the lens.

[0039] The prism may be a triangular prism having an incident surface, a reflection surface, and an exit surface, wherein the incident surface and the exit surface are perpendicular, so that the light perpendicularly incident to the incident surface is changed by 90° on the reflection surface and then exits perpendicularly to the exit surface. The use of a prism makes the direction of the incident light of the optical imaging lens perpendicular to the arrangement direction of the multiple lenses, thereby using the longitudinal length space of the mobile phone to match the arrangement length of the multiple lenses, avoiding the limitation of the body thickness on the focal length of the lens. In turn, it is also conducive to the mobile phone to have a thinner thickness.

[0040] In an exemplary embodiment, the first lens may have negative optical power; the second lens may have positive optical power; the third lens may have positive optical power or negative optical power; the fourth lens may have positive optical power; and the fifth lens may have negative optical power. Reasonable matching of the optical power and surface shape of each lens in the optical system can effectively widen the maximum field of view of the optical imaging lens, so that the optical system has good light converging ability.

[0041] In example embodiments, the object-side surface of the first lens may be a concave surface.

[0042] In example embodiments, the object-side surface of the second lens may be a convex surface, and the image-side surface may be a convex surface.

[0043] In example embodiments, the image-side surface of the third lens may be a convex surface, and the image-side surface may be a concave surface.

[0044] In example embodiments, the image-side surface of the fourth lens may be a convex surface.

[0045] In example embodiments, the image-side surface of the fifth lens may be a concave surface.

[0046] In an exemplary embodiment, the maximum field of view FOV of the optical imaging lens may satisfy: FOV>92.0°. For example, 92°<FOV<110.0°. By increasing the maximum field of view of the optical imaging lens, it becomes possible to configure more types of camera modules on mobile phones, greatly expanding the scope of use of the prism optical imaging lens with a foldback function.

[0047] In an exemplary embodiment, the effective focal length of the second lens and the combined focal length of the third lens and the fourth lens may satisfy: -2.50<f34 / f2<-0.50. By controlling the ratio of the effective focal length of the second lens to the combined focal length of the third lens and the fourth lens within a reasonable numerical range, the second lens can be matched with the first lens to more effectively increase the maximum field angle of the optical imaging lens.

[0048] In an exemplary embodiment, the effective focal length f1 of the first lens and the total effective focal length f of the optical imaging lens may satisfy: -5.50<f1 / f<-1.50. The first lens with negative optical power is a key element for increasing the maximum field angle of the optical imaging lens. By controlling the effective focal length of the first lens within a reasonable numerical range, the maximum field angle can be increased while avoiding the size of the prism of the optical imaging lens from being too large, thereby facilitating the reduction of the size of the optical imaging lens.

[0049] In an exemplary embodiment, the effective focal length f4 of the fourth lens and the curvature radius R10 of the image side surface of the fifth lens may satisfy: 1.50<f4 / R10<4.00. For example, 1.60<f4 / R10<3.60. The ratio of the effective focal length of the fourth lens to the curvature radius of the image side surface of the fifth lens is controlled within a reasonable numerical range, which can effectively increase the maximum field angle of the optical imaging lens while enabling the optical system to have good light convergence ability, and can avoid problems such as difficulty in processing the optical imaging lens due to the too small curvature radius of the image side surface of the fifth lens.

[0050] In an exemplary embodiment, the radius of curvature R1 of the object side surface of the first lens and the radius of curvature R8 of the image side surface of the fourth lens may satisfy: 1.00<(R1+R8) / (R1-R8)<2.50. For example, 1.40<(R1+R8) / (R1-R8)<2.20. Reasonable control of the relationship between the radius of curvature of the object side surface of the first lens and the radius of curvature of the image side surface of the fourth lens can increase the maximum field of view of the optical imaging lens while keeping the prism of the optical imaging lens with a smaller size, which is conducive to reducing the lateral size (i.e., the size in the thickness direction) of the optical imaging lens.

[0051] In an exemplary embodiment, the radius of curvature R5 of the object side surface of the third lens and the radius of curvature R6 of the image side surface of the third lens may satisfy: 1.00<R5 / R6<2.00. By controlling the ratio of the radius of curvature of the object side surface and the image side surface of the third lens within a reasonable numerical range, it is possible to ensure that the optical system has good aberration correction capability while also having good processability. The third lens is more sensitive than the other lenses in terms of eccentricity and curvature radius, so appropriately controlling the size of the radius of curvature of the object side surface and the image side surface of the third lens is very helpful in improving the processability of the optical imaging lens and improving the yield of the finished product.

[0052] In an exemplary embodiment, the center thickness CT2 of the second lens on the optical axis and the center thickness CT3 of the third lens on the optical axis may satisfy: 1.50<CT2 / CT3<4.50. For example, 1.90<CT2 / CT3<4.50. By controlling the ratio of the center thickness of the second lens to the center thickness of the third lens on the optical axis within a reasonable numerical range, firstly, the longitudinal dimension of the optical imaging lens may be prevented from being too long due to the second lens being too thick; secondly, the sensitivity of the third lens may be increased, the processing may be difficult, and other problems may be avoided due to the third lens being too thin; thirdly, the ratio of the center thickness of the second lens to the third lens on the optical axis may be prevented from being too small, which is beneficial to improving the aberration correction capability of the optical system and making the optical imaging lens have better imaging quality.

[0053] In an exemplary embodiment, the axial distance SAG11 from the intersection of the object side surface of the first lens and the optical axis to the vertex of the effective radius of the object side surface of the first lens and the axial distance SAG12 from the intersection of the image side surface of the first lens and the optical axis to the vertex of the effective radius of the image side surface of the first lens can satisfy: 1.50<(SAG11+SAG12) / (SAG12-SAG11)<3.00. Reasonable control of the relationship between the sagitta of the object side surface and the image side surface of the first lens can increase the maximum field of view of the optical imaging lens while avoiding the prism size of the optical system being too large due to the sum of the sagitta of the object side surface and the image side surface of the first lens being too large or the difference between the sagitta of the object side surface and the image side surface of the first lens being too large, thereby being unfavorable for reducing the lateral size of the optical imaging lens; and avoiding the maximum field of view of the optical imaging lens not being effectively increased due to the sum of the sagitta of the object side surface and the image side surface of the first lens being too small or the difference between the sagitta of the object side surface and the image side surface of the first lens being too small, and the sensitivity of the first lens being increased, resulting in lens processing difficulties and other problems.

[0054] In an exemplary embodiment, the maximum effective radius DT11 of the object side surface of the first lens and the maximum effective radius DT12 of the image side surface of the first lens may satisfy: 6.00<(DT11+DT12) / (DT11-DT12)<10.50. Reasonable control of the relationship between the maximum effective radius of the object side surface and the image side surface of the first lens is conducive to increasing the maximum field angle of the optical imaging lens and reducing the sensitivity of the first lens, while effectively reducing the lateral size of the optical imaging lens and broadening the application prospects of the optical imaging lens.

[0055] In an exemplary embodiment, the maximum effective radius DT51 of the object side surface of the fifth lens and the maximum effective radius DT52 of the image side surface of the fifth lens may satisfy: 4.00<(DT51+DT52) / (DT52-DT51)<11.00. Reasonable control of the relationship between the maximum effective radius of the object side surface and the image side surface of the fifth lens can effectively correct the edge light aberration and improve the image height of the optical imaging lens.

[0056] In an exemplary embodiment, the optical imaging lens may further include a diaphragm. The diaphragm may be disposed at an appropriate position as required. For example, the diaphragm may be disposed between the prism and the second lens. Optionally, the optical imaging lens may further include a filter for correcting color deviation and / or a protective glass for protecting a photosensitive element located on the imaging surface.

[0057] The present application proposes an optical imaging lens with characteristics such as ultra-large field of view and ultra-thinness. The optical imaging lens according to the above-mentioned embodiment of the present application can use multiple lenses, such as the five lenses mentioned above. By reasonably allocating the optical focal length, surface shape, center thickness of each lens, and axial spacing between each lens, etc., the incident light can be effectively converged, the total optical length of the imaging lens can be reduced, and the processability of the imaging lens can be improved, making the optical imaging lens more conducive to production and processing. In addition, by using a prism, the lateral size of the lens can be effectively shortened, which is conducive to the ultra-thinness of portable electronic products such as mobile phones.

[0058] In an exemplary embodiment, at least one of the mirror surfaces of each lens is an aspherical mirror surface, that is, at least one of the mirror surfaces from the object side of the first lens to the image side of the fifth lens is an aspherical mirror surface. The characteristic of an aspherical lens is that the curvature changes continuously from the center of the lens to the periphery of the lens. Unlike a spherical lens having a constant curvature from the center of the lens to the periphery of the lens, an aspherical lens has a better curvature radius characteristic, and has the advantages of improving distortion aberration and improving astigmatism aberration. After adopting an aspherical lens, the aberration occurring during imaging can be eliminated as much as possible, thereby improving the imaging quality. Optionally, at least one of the object side and image side of each lens in the first lens, the second lens, the third lens, the fourth lens and the fifth lens is an aspherical mirror surface. Optionally, the object side and image side of each lens in the first lens, the second lens, the third lens, the fourth lens and the fifth lens are all aspherical mirror surfaces.

[0059] However, those skilled in the art should understand that, without departing from the technical solution claimed in the present application, the number of lenses constituting the optical imaging lens can be changed to obtain the various results and advantages described in this specification. For example, although five lenses are described as an example in the embodiments, the optical imaging lens is not limited to including five lenses. If necessary, the optical imaging lens may also include other numbers of lenses.

[0060] Specific embodiments of the optical imaging lens applicable to the above-mentioned embodiments are further described below with reference to the accompanying drawings.

[0061] Example 1

[0062] The following reference Figures 1 to 2C An optical imaging lens according to Embodiment 1 of the present application is described. Figure 1 is a schematic diagram showing the structure of an optical imaging lens according to Example 1 of the present application.

[0063] like Figure 1 As shown, the optical imaging lens includes, in order from the object side to the image side along the optical axis: a first lens E1, a prism E2, an aperture STO, a second lens E3, a third lens E4, a fourth lens E5, a fifth lens E6 and a filter E7.

[0064] The first lens E1 has negative focal power, and its object side surface S1 is concave, and the image side surface S2 is concave. The incident surface S3, the reflection surface S4, and the exit surface S5 of the prism E2 are all spherical surfaces, and the reflection surface S4 forms an angle of 45° with the optical axis, so that the light incident perpendicular to the incident surface S3 of the prism E2 is deflected 90° by the reflection surface S4 and then exits the prism E2 perpendicularly to the exit surface S5. The second lens E3 has positive focal power, and its object side surface S6 is convex, and the image side surface S7 is convex. The third lens E4 has negative focal power, and its object side surface S8 is convex, and the image side surface S9 is concave. The fourth lens E5 has positive focal power, and its object side surface S10 is convex, and the image side surface S11 is convex. The fifth lens E6 has negative focal power, and its object side surface S12 is convex, and the image side surface S13 is concave. The filter E7 has an object side surface S14 and an image side surface S15. Light from an object passes through the surfaces S1 to S15 in sequence and is finally imaged on an imaging surface S16 (not shown).

[0065] Table 1 shows the basic parameters of the optical imaging lens of Example 1, wherein the units of the radius of curvature, thickness and focal length are all millimeters (mm).

[0066]

[0067] Table 1

[0068] In this embodiment, the total effective focal length f of the optical imaging lens is 2.36 mm, half of the diagonal length of the effective pixel area on the imaging surface S16 is ImgH=2.50 mm, the maximum half field of view Semi-FOV of the optical imaging lens is 46.7°, and the aperture value Fno of the optical imaging lens is 2.88.

[0069] In Example 1, the object side surface and the image side surface of any lens among the first lens E1 to the fifth lens E6 are both aspherical surfaces, and the surface shape x of each aspherical lens can be defined by but not limited to the following aspherical surface formula:

[0070]

[0071] 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 curvature radius R in Table 1 above); k is the cone coefficient; Ai is the correction coefficient of the i-th order of the aspheric surface. The following Table 2 gives the high-order coefficients A of each aspheric mirror surface that can be used in Example 1 4 , A 6 , A 8 , A 10 , A 12 , A 14 , A 16 , A 18 and A20 .

[0072]

[0073]

[0074] Table 2

[0075] Figure 2A The astigmatism curve of the optical imaging lens of Example 1 is shown, which represents the meridional image curvature and the sagittal image curvature. Figure 2B The distortion curve of the optical imaging lens of Example 1 is shown, which represents the distortion magnitude values ​​corresponding to different image heights. Figure 2C The relative illumination curve of the optical imaging lens of Example 1 is shown, which indicates the relative illumination values ​​corresponding to different image heights. FIG. 2A to FIG. 2C It can be seen that the optical imaging lens provided in Example 1 can achieve good imaging quality.

[0076] Example 2

[0077] The following reference Figures 3 to 4C An optical imaging lens according to Embodiment 2 of the present application is described. Figure 3 is a schematic diagram showing the structure of an optical imaging lens according to Embodiment 2 of the present application.

[0078] like Figure 3 As shown, the optical imaging lens includes, in order from the object side to the image side along the optical axis: a first lens E1, a prism E2, an aperture STO, a second lens E3, a third lens E4, a fourth lens E5, a fifth lens E6 and a filter E7.

[0079] The first lens E1 has negative focal power, and its object side surface S1 is concave, and the image side surface S2 is concave. The incident surface S3, the reflection surface S4 and the exit surface S5 of the prism E2 are all spherical surfaces, and the reflection surface S4 forms an angle of 45° with the optical axis, so that the light incident perpendicular to the incident surface S3 of the prism E2 is deflected 90° by the reflection surface S4 and then exits the prism E2 perpendicularly to the exit surface S5. The second lens E3 has positive focal power, and its object side surface S6 is convex, and the image side surface S7 is convex. The third lens E4 has negative focal power, and its object side surface S8 is convex, and the image side surface S9 is concave. The fourth lens E5 has positive focal power, and its object side surface S10 is concave, and the image side surface S11 is convex. The fifth lens E6 has negative focal power, and its object side surface S12 is convex, and the image side surface S13 is concave. The filter E7 has an object side surface S14 and an image side surface S15. Light from an object passes through the surfaces S1 to S15 in sequence and is finally imaged on an imaging surface S16 (not shown).

[0080] In this embodiment, the total effective focal length f of the optical imaging lens is 2.33 mm, half of the diagonal length of the effective pixel area on the imaging surface S16 is ImgH=2.50 mm, the maximum half field of view Semi-FOV of the optical imaging lens is 47.6°, and the aperture value Fno of the optical imaging lens is 2.80.

[0081] Table 3 shows the basic parameters of the optical imaging lens of Example 2, wherein the units of the radius of curvature, thickness and focal length are all millimeters (mm).

[0082]

[0083]

[0084] Table 3

[0085] In Example 2, the object side surface and the image side surface of any lens from the first lens E1 to the fifth lens E6 are both aspherical surfaces. The following Table 4 lists the high-order coefficients A of the aspherical mirror surfaces that can be used in Example 2. 4 , A 6 , A 8 , A 10 , A 12 , A 14 , A 16 , A 18 and A 20 , wherein each aspheric surface shape can be defined by the formula (1) given in the above embodiment 1.

[0086] Face number A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 1.6719E-01 -1.4721E-01 1.6311E-01 -1.6148E-01 1.2090E-01 -6.4911E-02 2.4456E-02 -6.2987E-03 1.0554E-03 S2 1.8508E-01 -1.2291E-01 1.0427E-01 4.8852E-04 -1.7624E-01 2.8163E-01 -2.3731E-01 1.2191E-01 -3.8349E-02 S6 1.9157E-02 1.2447E-01 2.5175E+00 -1.0394E+02 1.5457E+03 -1.2895E+04 6.7505E+04 -2.3049E+05 5.1379E+05 S7 6.8856E-02 -1.8751E-01 1.9590E+00 -2.1743E+01 1.6215E+02 -7.8820E+02 2.5713E+03 -5.6844E+03 8.4030E+03 S8 -4.8154E-03 5.7896E-01 -1.5347E+00 8.9715E-01 1.1632E+01 -5.3691E+01 1.2573E+02 -1.8354E+02 1.6992E+02 S9 9.5536E-02 -2.7190E-01 2.3903E+00 -1.4056E+01 5.4309E+01 -1.4220E+02 2.5457E+02 -3.0751E+02 2.3991E+02 S10 6.6889E-03 -8.2748E-01 5.1399E+00 -1.8322E+01 4.3356E+01 -7.1197E+01 8.2254E+01 -6.6596E+01 3.6963E+01 S11 -2.0919E-01 9.9323E-02 -1.7192E-01 3.1965E+00 -1.3672E+01 3.0298E+01 -4.1688E+01 3.7640E+01 -2.2407E+01 S12 1.4522E-01 -7.5990E-03 1.2108E-01 -6.5783E-03 -8.7071E-01 2.1707E+00 -2.7644E+00 2.1714E+00 -1.0953E+00 S13 9.3984E-02 -1.1991E-02 6.7798E-02 -2.1710E-01 3.1778E-01 -2.8137E-01 1.6386E-01 -6.4231E-02 1.6784E-02

[0087] Table 4

[0088] Figure 4A The astigmatism curve of the optical imaging lens of Example 2 is shown, which represents the meridional image curvature and the sagittal image curvature. Figure 4B The distortion curve of the optical imaging lens of Example 2 is shown, which represents the distortion magnitude values ​​corresponding to different image heights. Figure 4C The relative illumination curve of the optical imaging lens of Example 2 is shown, which indicates the relative illumination values ​​corresponding to different image heights. FIG. 4A to FIG. 4C It can be seen that the optical imaging lens provided in Example 2 can achieve good imaging quality.

[0089] Example 3

[0090] The following reference Figures 5 to 6C An optical imaging lens according to Embodiment 3 of the present application is described. Figure 5 is a schematic diagram showing the structure of an optical imaging lens according to Example 3 of the present application.

[0091] like Figure 5 As shown, the optical imaging lens includes, in order from the object side to the image side along the optical axis: a first lens E1, a prism E2, an aperture STO, a second lens E3, a third lens E4, a fourth lens E5, a fifth lens E6 and a filter E7.

[0092] The first lens E1 has negative focal power, and its object side surface S1 is concave, and the image side surface S2 is convex. The incident surface S3, the reflection surface S4 and the exit surface S5 of the prism E2 are all spherical surfaces, and the reflection surface S4 forms an angle of 45° with the optical axis, so that the light incident perpendicular to the incident surface S3 of the prism E2 is deflected 90° by the reflection surface S4 and then exits from the prism E2 perpendicularly to the exit surface S5. The second lens E3 has positive focal power, and its object side surface S6 is convex, and the image side surface S7 is convex. The third lens E4 has negative focal power, and its object side surface S8 is convex, and the image side surface S9 is concave. The fourth lens E5 has positive focal power, and its object side surface S10 is concave, and the image side surface S11 is convex. The fifth lens E6 has negative focal power, and its object side surface S12 is convex, and the image side surface S13 is concave. The filter E7 has an object side surface S14 and an image side surface S15. Light from an object passes through the surfaces S1 to S15 in sequence and is finally imaged on an imaging surface S16 (not shown).

[0093] In this embodiment, the total effective focal length f of the optical imaging lens is 2.39 mm, half of the diagonal length of the effective pixel area on the imaging surface S16 is ImgH=2.45 mm, the maximum half field of view Semi-FOV of the optical imaging lens is 48.7°, and the aperture value Fno of the optical imaging lens is 2.70.

[0094] Table 5 shows the basic parameters of the optical imaging lens of Example 3, wherein the units of the radius of curvature, thickness and focal length are all millimeters (mm).

[0095]

[0096]

[0097] Table 5

[0098] In Example 3, the object side surface and the image side surface of any lens from the first lens E1 to the fifth lens E6 are both aspherical surfaces. The following Table 6 lists the high-order coefficients A of the aspherical mirror surfaces that can be used in Example 3. 4 , A 6 , A 8 , A 10 , A 12 , A 14 , A 16 , A 18 and A 20 , wherein each aspheric surface shape can be defined by the formula (1) given in the above embodiment 1.

[0099] Face number A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 1.4473E-01 -1.2708E-01 1.5326E-01 -1.5977E-01 1.1957E-01 -6.1709E-02 2.1732E-02 -5.1271E-03 7.7540E-04 S2 1.6128E-01 -1.7866E-01 3.1859E-01 -4.3584E-01 3.9584E-01 -2.3366E-01 8.7576E-02 -1.9428E-02 2.0344E-03 S6 3.0296E-02 -8.1542E-01 2.1989E+01 -3.4046E+02 3.3698E+03 -2.2115E+04 9.7901E+04 -2.9191E+05 5.7309E+05 S7 1.1522E-01 -5.4828E-01 2.3720E+00 -1.9074E+01 2.2620E+02 -1.9108E+03 1.0471E+04 -3.7487E+04 8.7249E+04 S8 -1.3388E-02 1.0680E+00 -9.8721E+00 7.9773E+01 -4.7710E+02 2.0080E+03 -5.8038E+03 1.1229E+04 -1.3865E+04 S9 9.3933E-02 2.2010E-02 -1.7114E+00 1.4714E+01 -7.3825E+01 2.4532E+02 -5.5298E+02 8.3896E+02 -8.2340E+02 S10 -5.6828E-02 3.4914E-04 4.8122E-02 1.3763E+00 -8.0769E+00 2.2198E+01 -3.7188E+01 4.0653E+01 -2.9228E+01 S11 -1.8253E-01 -3.3264E-01 3.0642E+00 -1.1032E+01 2.5776E+01 -4.2068E+01 4.8506E+01 -3.9218E+01 2.1701E+01 S12 1.5565E-01 -7.2426E-02 5.2497E-02 1.1039E+00 -4.4980E+00 8.6366E+00 -9.9947E+00 7.4602E+00 -3.6261E+00 S13 5.9728E-02 5.2953E-02 -1.1370E-03 -2.1537E-01 3.9657E-01 -3.7766E-01 2.2471E-01 -8.7826E-02 2.2590E-02

[0100] Table 6

[0101] Fig. 6A The astigmatism curve of the optical imaging lens of Example 3 is shown, which represents the meridional image curvature and the sagittal image curvature. Figure 6B The distortion curve of the optical imaging lens of Example 3 is shown, which represents the distortion magnitude values ​​corresponding to different image heights. Figure 6C The relative illumination curve of the optical imaging lens of Example 3 is shown, which indicates the relative illumination values ​​corresponding to different image heights. FIG. 6A to FIG. 6C It can be seen that the optical imaging lens provided in Example 3 can achieve good imaging quality.

[0102] Example 4

[0103] The following reference Figures 7 to 8C An optical imaging lens according to Embodiment 4 of the present application is described. Figure 7 is a schematic diagram showing the structure of an optical imaging lens according to Example 4 of the present application.

[0104] like Figure 7 As shown, the optical imaging lens includes, in order from the object side to the image side along the optical axis: a first lens E1, a prism E2, an aperture STO, a second lens E3, a third lens E4, a fourth lens E5, a fifth lens E6 and a filter E7.

[0105] The first lens E1 has negative focal power, and its object side surface S1 is concave, and the image side surface S2 is concave. The incident surface S3, the reflection surface S4 and the exit surface S5 of the prism E2 are all spherical surfaces, and the reflection surface S4 forms an angle of 45° with the optical axis, so that the light incident perpendicular to the incident surface S3 of the prism E2 is deflected 90° by the reflection surface S4 and then exits from the prism E2 perpendicularly to the exit surface S5. The second lens E3 has positive focal power, and its object side surface S6 is convex, and the image side surface S7 is convex. The third lens E4 has positive focal power, and its object side surface S8 is convex, and the image side surface S9 is concave. The fourth lens E5 has positive focal power, and its object side surface S10 is concave, and the image side surface S11 is convex. The fifth lens E6 has negative focal power, and its object side surface S12 is convex, and the image side surface S13 is concave. The filter E7 has an object side surface S14 and an image side surface S15. Light from an object passes through the surfaces S1 to S15 in sequence and is finally imaged on an imaging surface S16 (not shown).

[0106] In this embodiment, the total effective focal length f of the optical imaging lens is 2.12 mm, half of the diagonal length of the effective pixel area on the imaging surface S16 is ImgH=2.39 mm, the maximum half field of view Semi-FOV of the optical imaging lens is 52.1°, and the aperture value Fno of the optical imaging lens is 2.60.

[0107] Table 7 shows the basic parameters of the optical imaging lens of Example 4, wherein the units of the radius of curvature, thickness and focal length are all millimeters (mm).

[0108]

[0109] Table 7

[0110] In Example 4, the object side surface and the image side surface of any lens from the first lens E1 to the fifth lens E6 are both aspherical surfaces. The following Table 8 lists the high-order coefficients A of the aspherical mirror surfaces that can be used in Example 4. 4 , A 6 , A 8 , A 10 , A 12 , A 14 , A 16 , A 18 and A 20 , wherein each aspheric surface shape can be defined by the formula (1) given in the above embodiment 1.

[0111]

[0112]

[0113] Table 8

[0114] Fig. 8A The astigmatism curve of the optical imaging lens of Example 4 is shown, which represents the meridional image curvature and the sagittal image curvature. Figure 8B The distortion curve of the optical imaging lens of Example 4 is shown, which represents the distortion magnitude values ​​corresponding to different image heights. Figure 8C The relative illumination curve of the optical imaging lens of Example 4 is shown, which indicates the relative illumination values ​​corresponding to different image heights. FIG. 8A to FIG. 8C It can be seen that the optical imaging lens provided in Example 4 can achieve good imaging quality.

[0115] Example 5

[0116] The following reference Figures 9 to 10C An optical imaging lens according to Embodiment 5 of the present application is described. Fig. 9 is a schematic diagram showing the structure of an optical imaging lens according to Example 5 of the present application.

[0117] like Fig. 9 As shown, the optical imaging lens includes, in order from the object side to the image side along the optical axis: a first lens E1, a prism E2, an aperture STO, a second lens E3, a third lens E4, a fourth lens E5, a fifth lens E6 and a filter E7.

[0118] The first lens E1 has negative focal power, and its object side surface S1 is concave, and the image side surface S2 is concave. The incident surface S3, the reflection surface S4 and the exit surface S5 of the prism E2 are all spherical surfaces, and the reflection surface S4 forms an angle of 45° with the optical axis, so that the light incident perpendicular to the incident surface S3 of the prism E2 is deflected 90° by the reflection surface S4 and then exits from the prism E2 perpendicularly to the exit surface S5. The second lens E3 has positive focal power, and its object side surface S6 is convex, and the image side surface S7 is convex. The third lens E4 has positive focal power, and its object side surface S8 is convex, and the image side surface S9 is concave. The fourth lens E5 has positive focal power, and its object side surface S10 is concave, and the image side surface S11 is convex. The fifth lens E6 has negative focal power, and its object side surface S12 is concave, and the image side surface S13 is concave. The filter E7 has an object side surface S14 and an image side surface S15. Light from an object passes through the surfaces S1 to S15 in sequence and is finally imaged on an imaging surface S16 (not shown).

[0119] In this embodiment, the total effective focal length f of the optical imaging lens is 2.11 mm, half of the diagonal length of the effective pixel area on the imaging surface S16 is ImgH=2.39 mm, the maximum half field of view Semi-FOV of the optical imaging lens is 52.9°, and the aperture value Fno of the optical imaging lens is 2.55.

[0120] Table 9 shows the basic parameters of the optical imaging lens of Example 5, wherein the units of the radius of curvature, thickness and focal length are all millimeters (mm).

[0121]

[0122]

[0123] Table 9

[0124] In Example 5, the object side surface and the image side surface of any lens from the first lens E1 to the fifth lens E6 are both aspherical surfaces. The following Table 10 lists the high-order coefficients A of the aspherical mirror surfaces that can be used in Example 5. 4 , A 6 , A 8 , A 10 , A 12 , A 14 , A 16 , A 18 and A 20, wherein each aspheric surface shape can be defined by the formula (1) given in the above embodiment 1.

[0125] Face number A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 1.3857E-01 -5.9584E-02 -5.0978E-02 1.6433E-01 -1.9576E-01 1.4067E-01 -6.6815E-02 2.1484E-02 -4.6358E-03 S2 1.4439E-01 -6.1681E-02 -1.3934E-02 -1.4787E-02 2.8482E-01 -6.1298E-01 6.7204E-01 -4.4729E-01 1.8828E-01 S6 4.9970E-02 -1.3122E+00 4.3256E+01 -8.4724E+02 1.0732E+04 -9.1203E+04 5.2979E+05 -2.1078E+06 5.6460E+06 S7 4.2947E-01 -3.4563E-01 -1.4397E+01 1.6958E+02 -1.0992E+03 4.6989E+03 -1.3850E+04 2.8382E+04 -3.9795E+04 S8 -1.2487E-01 2.1483E+00 -1.4459E+01 7.5674E+01 -2.8630E+02 7.5412E+02 -1.3530E+03 1.6085E+03 -1.2031E+03 S9 4.5528E-03 5.1642E-01 -1.8963E+00 4.8337E+00 -6.2806E+00 -9.7499E+00 6.3439E+01 -1.3215E+02 1.4473E+02 S10 -7.4343E-02 1.2674E-01 1.1484E-01 -1.8827E+00 6.5572E+00 -1.1621E+01 1.0600E+01 -2.5584E+00 -4.4345E+00 S11 -4.7657E-01 3.0669E+00 -1.5866E+01 5.6138E+01 -1.4140E+02 2.5737E+02 -3.3661E+02 3.1106E+02 -1.9722E+02 S12 -5.6346E-03 2.1795E+00 -1.1892E+01 4.1797E+01 -1.0530E+02 1.9295E+02 -2.5356E+02 2.3388E+02 -1.4684E+02 S13 3.1024E-02 3.3304E-01 -9.9985E-01 1.5706E+00 -1.5632E+00 1.0479E+00 -4.8471E-01 1.5507E-01 -3.3693E-02

[0126] Table 10

[0127] Fig. 10A The astigmatism curve of the optical imaging lens of Example 5 is shown, which represents the meridional image curvature and the sagittal image curvature. Fig. 10B The distortion curve of the optical imaging lens of Example 5 is shown, which represents the distortion magnitude values ​​corresponding to different image heights. Fig. 10C The relative illumination curve of the optical imaging lens of Example 5 is shown, which indicates the relative illumination values ​​corresponding to different image heights. FIG. 10A to FIG. 10C It can be seen that the optical imaging lens provided in Example 5 can achieve good imaging quality.

[0128] Example 6

[0129] The following reference Figures 11 to 12C An optical imaging lens according to Example 6 of the present application is described. Fig.11 is a schematic diagram showing the structure of an optical imaging lens according to Example 6 of the present application.

[0130] like Fig.11 As shown, the optical imaging lens includes, in order from the object side to the image side along the optical axis: a first lens E1, a prism E2, an aperture STO, a second lens E3, a third lens E4, a fourth lens E5, a fifth lens E6 and a filter E7.

[0131] The first lens E1 has negative focal power, and its object side surface S1 is concave, and the image side surface S2 is convex. The incident surface S3, the reflection surface S4 and the exit surface S5 of the prism E2 are all spherical surfaces, and the reflection surface S4 forms an angle of 45° with the optical axis, so that the light incident perpendicular to the incident surface S3 of the prism E2 is deflected 90° by the reflection surface S4 and then exits the prism E2 perpendicularly to the exit surface S5. The second lens E3 has positive focal power, and its object side surface S6 is convex, and the image side surface S7 is convex. The third lens E4 has negative focal power, and its object side surface S8 is convex, and the image side surface S9 is concave. The fourth lens E5 has positive focal power, and its object side surface S10 is concave, and the image side surface S11 is convex. The fifth lens E6 has negative focal power, and its object side surface S12 is concave, and the image side surface S13 is concave. The filter E7 has an object side surface S14 and an image side surface S15. Light from an object passes through the surfaces S1 to S15 in sequence and is finally imaged on an imaging surface S16 (not shown).

[0132] In this embodiment, the total effective focal length f of the optical imaging lens is 2.12 mm, half of the diagonal length of the effective pixel area on the imaging surface S16 is ImgH=2.25 mm, the maximum half field of view Semi-FOV of the optical imaging lens is 53.2°, and the aperture value Fno of the optical imaging lens is 3.10.

[0133] Table 11 shows the basic parameters of the optical imaging lens of Example 6, wherein the units of the radius of curvature, thickness and focal length are all millimeters (mm).

[0134]

[0135]

[0136] Table 11

[0137] In Example 6, the object side surface and the image side surface of any lens from the first lens E1 to the fifth lens E6 are both aspherical surfaces. The following Table 12 lists the high-order coefficients A of the aspherical mirror surfaces that can be used in Example 6. 4 , A 6 , A 8 , A 10 , A 12 , A 14 , A 16 , A 18 and A 20 , wherein each aspheric surface shape can be defined by the formula (1) given in the above embodiment 1.

[0138] Face number A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 9.8629E-02 -1.2966E-02 -7.8605E-02 1.3646E-01 -1.2261E-01 6.9885E-02 -2.6748E-02 6.9770E-03 -1.2255E-03 S2 1.1392E-01 -6.9222E-02 6.0528E-02 -8.4352E-02 1.2589E-01 -1.3113E-01 8.9093E-02 -3.9749E-02 1.1592E-02 S6 9.8268E-02 -7.0856E+00 3.3251E+02 -9.4545E+03 1.7593E+05 -2.2312E+06 1.9652E+07 -1.2027E+08 5.0170E+08 S7 3.2988E-01 1.1698E+00 -3.9617E+01 4.8710E+02 -3.9807E+03 2.3033E+04 -9.4611E+04 2.7193E+05 -5.3141E+05 S8 -1.6785E-01 2.7925E+00 -2.3161E+01 1.4326E+02 -6.4577E+02 2.1288E+03 -5.1343E+03 8.8639E+03 -1.0337E+04 S9 -3.6502E-02 8.7538E-01 -6.0841E+00 3.6209E+01 -1.6734E+02 5.6621E+02 -1.3561E+03 2.2156E+03 -2.3322E+03 S10 -6.0777E-02 1.9274E-01 -1.7310E-01 -3.8027E+00 2.4498E+01 -7.7822E+01 1.5314E+02 -1.9723E+02 1.6667E+02 S11 -3.1606E-01 1.5251E+00 -6.1044E+00 1.7121E+01 -3.5338E+01 5.4028E+01 -5.9878E+01 4.6575E+01 -2.4346E+01 S12 -5.2667E-02 1.9829E+00 -1.1739E+01 4.6142E+01 -1.2457E+02 2.3224E+02 -2.9930E+02 2.6509E+02 -1.5812E+02 S13 2.6226E-03 2.4971E-01 -6.1925E-01 8.7985E-01 -8.3443E-01 5.5599E-01 -2.6377E-01 8.8286E-02 -2.0269E-02

[0139] Table 12

[0140] Fig. 12A The astigmatism curve of the optical imaging lens of Example 6 is shown, which represents the meridional image curvature and the sagittal image curvature. Fig. 12B The distortion curve of the optical imaging lens of Example 6 is shown, which represents the distortion magnitude values ​​corresponding to different image heights. Fig. 12C The relative illumination curve of the optical imaging lens of Example 6 is shown, which indicates the relative illumination values ​​corresponding to different image heights. FIG. 12A to FIG. 12C It can be seen that the optical imaging lens provided in Example 6 can achieve good imaging quality.

[0141] In summary, Examples 1 to 6 respectively satisfy the relationships shown in Table 13.

[0142]

[0143]

[0144] Table 13

[0145] The present application also provides an imaging device, which is provided with an electronic photosensitive element for imaging, and the electronic photosensitive element can be a charge coupled device (CCD) or a complementary metal oxide semiconductor (CMOS). The imaging device can be an independent imaging device such as a digital camera, or an imaging module integrated in a mobile electronic device such as a mobile phone. The imaging device is equipped with the optical imaging lens described above.

[0146] The above description is only a preferred embodiment of the present application and an explanation of the technical principles used. Those skilled in the art should understand that the scope of the invention involved in the present application is not limited to the technical solution formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the inventive concept. For example, the above features are replaced with (but not limited to) technical features with similar functions disclosed in the present application.

Claims

1. An optical imaging lens, It is characterized in that Along the optical axis from the object side to the image side, they include: A first lens having negative optical power, whose object side surface is concave; A prism, wherein the prism comprises an incident surface, a reflecting surface and an exiting surface, and the angle between the reflecting surface and the optical axis is 45°; Aperture; The second lens has positive power, and its object-side surface is convex and its image-side surface is convex; a third lens having positive or negative power, whose object side surface is convex and whose image side surface is concave; a fourth lens element having positive refractive power and a convex image-side surface; and A fifth lens element having negative optical power and a concave image-side surface; The number of lenses having optical power in the optical imaging lens is five; The maximum field of view FOV of the optical imaging lens satisfies: 93.40°≤FOV≤106.30°; The effective focal length f1 of the first lens and the total effective focal length f of the optical imaging lens satisfy: -5.14≤f1 / f≤-1.

73.

2. The optical imaging lens according to claim 1, It is characterized in that The effective focal length f2 of the second lens and the combined focal length f34 of the third lens and the fourth lens satisfy: -2.30≤f34 / f2≤-0.

78.

3. The optical imaging lens according to claim 1, It is characterized in that The effective focal length f4 of the fourth lens and the curvature radius R10 of the image side surface of the fifth lens satisfy: 1.60<f4 / R10≤3.

50.

4. The optical imaging lens according to claim 1, It is characterized in that The curvature radius R1 of the object side surface of the first lens and the curvature radius R8 of the image side surface of the fourth lens satisfy: 1.40<(R1+R8) / (R1-R8)≤2.

11.

5. The optical imaging lens according to claim 1, It is characterized in that The curvature radius R5 of the object side surface of the third lens and the curvature radius R6 of the image side surface of the third lens satisfy: 1.00<R5 / R6≤1.

78.

6. The optical imaging lens according to claim 1, It is characterized in that The center thickness CT2 of the second lens on the optical axis and the center thickness CT3 of the third lens on the optical axis satisfy: 2.00≤CT2 / CT3≤4.

34.

7. The optical imaging lens according to claim 1, It is characterized in that 1.92≤(SAG11+SAG12) / (SAG12-SAG11)≤2.72, Among them, SAG11 is the on-axis distance from the intersection of the object side surface of the first lens and the optical axis to the vertex of the effective radius of the object side surface of the first lens, and SAG12 is the on-axis distance from the intersection of the image side surface of the first lens and the optical axis to the vertex of the effective radius of the image side surface of the first lens.

8. The optical imaging lens according to claim 1, It is characterized in that The maximum effective radius DT11 of the object side surface of the first lens and the maximum effective radius DT12 of the image side surface of the first lens satisfy: 6.10≤(DT11+DT12) / (DT11-DT12)≤10.

14.

9. The optical imaging lens according to claim 1, It is characterized in that The maximum effective radius DT51 of the object side surface of the fifth lens and the maximum effective radius DT52 of the image side surface of the fifth lens satisfy: 4.25≤(DT51+DT52) / (DT52-DT51)≤10.67.

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