Optical imaging lens set

Abstract

The present application discloses an optical imaging lens group, which includes, in order from the object side to the image side along the optical axis: a first prism having a first reflection surface; a first lens having optical power, whose object side surface is convex; a second lens having optical power; a third lens having optical power, whose object side surface is concave and whose image side surface is convex; a fourth lens having optical power; a fifth lens having optical power; and a second prism having a second reflection surface. The optical distortion Dist. of the optical imaging lens group satisfies: |Dist.|<0.1%.

Description

Technical Field

[0001] The present application relates to the field of optical elements, and more specifically, to an optical imaging lens group. Background Art

[0002] With the rapid development of electronic products, the application of camera lenses is becoming more and more extensive. On the one hand, as electronic products gradually develop towards the trend of being lighter and thinner, their camera lenses must not only have good image quality, but also be thin and light, so as to effectively reduce product costs and be more user-friendly. On the other hand, people have also put forward higher requirements on the image quality of objects photographed by the camera lenses of electronic products. At the same time, with the advancement of semiconductor process technology, the pixel size of photosensitive elements has been continuously reduced, making the camera lenses mounted on portable electronic products such as mobile phones or digital cameras gradually tend to develop in the fields of miniaturization and high pixels.

[0003] How to achieve the characteristics of lightness, thinness and miniaturization of camera lenses while ensuring that the camera lenses have the characteristics of short overall length, good imaging quality and small distortion is one of the difficult problems that many lens designers need to solve urgently. Summary of the invention

[0004] On the one hand, the present application provides an optical imaging lens group, which includes, in order from the object side to the image side along the optical axis: a first prism having a first reflective surface; a first lens having optical focal length, whose object side surface is convex; a second lens having optical focal length; a third lens having optical focal length, whose object side surface is concave and image side surface is convex; a fourth lens having optical focal length; a fifth lens having optical focal length; and a second prism having a second reflective surface; the optical distortion Dist. of the optical imaging lens group can satisfy: |Dist.|<0.1%.

[0005] In one embodiment, there is at least one aspherical mirror surface from the object side surface of the first lens to the image side surface of the fifth lens.

[0006] In one embodiment, the combined focal length f34 of the third lens and the fourth lens and half of the maximum field of view Semi-FOV of the optical imaging lens group may satisfy: -1.3mm<f34×tan(Semi-FOV)<-0.3mm.

[0007] In one embodiment, the combined focal length f12 of the first lens and the second lens and the effective focal length f4 of the fourth lens may satisfy: -0.7<f4 / f12<-0.2.

[0008] In one embodiment, the curvature radius R1 of the object-side surface of the first lens and the total effective focal length f of the optical imaging lens assembly may satisfy: 0.2<R1 / f<0.7.

[0009] In one embodiment, a curvature radius R9 of the object-side surface of the fifth lens, a curvature radius R10 of the image-side surface of the fifth lens, and an effective focal length f5 of the fifth lens may satisfy: -0.7<(R9+R10) / f5<-0.2.

[0010] In one embodiment, the distance SAG32 from the intersection of the image side surface of the third lens and the optical axis to the vertex of the effective radius of the image side surface of the third lens on the optical axis and the distance SAG52 from the intersection of the image side surface of the fifth lens and the optical axis to the vertex of the effective radius of the image side surface of the fifth lens on the optical axis may satisfy: -1.0<SAG32 / SAG52<-0.5.

[0011] In one embodiment, an edge thickness ET1 of the first lens and an edge thickness ET3 of the third lens may satisfy: 0.3<ET1 / ET3<0.8.

[0012] In one embodiment, an edge thickness ET4 of the fourth lens and an edge thickness ET5 of the fifth lens may satisfy: 0.3<ET5 / (ET4+ET5)<0.8.

[0013] 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: 0.5<R5 / R6<1.0.

[0014] In one embodiment, the center thickness CT1 of the first lens on the optical axis, the center thickness CT2 of the second lens on the optical axis, the center thickness CT3 of the third lens on the optical axis, the center thickness CT4 of the fourth lens on the optical axis, and the center thickness CT5 of the fifth lens on the optical axis may satisfy: 0.5<(CT2+CT4) / (CT1+CT3+CT5)<1.5.

[0015] In one embodiment, a spacing distance T12 between the first lens and the second lens on the optical axis and a spacing distance T23 between the second lens and the third lens on the optical axis may satisfy: 0.2<T12 / T23<0.7.

[0016] In one embodiment, the fourth lens may have positive optical power.

[0017] In one embodiment, the fifth lens element may have negative refractive power, and its object-side surface may be convex, and its image-side surface may be concave.

[0018] On the other hand, the present application also provides such an optical imaging lens group. The optical imaging lens group includes, in order from the object side to the image side along the optical axis: a first prism with a first reflection surface; a first lens with optical power; a second lens with optical power; a third lens with optical power; a fourth lens with positive optical power; a fifth lens with negative optical power, whose object side surface is convex and image side surface is concave; and a second prism with a second reflection surface. The optical distortion Dist. of the optical imaging lens group satisfies: |Dist.|<0.1%.

[0019] The present application provides an optical imaging lens group, which has at least one beneficial effect of miniaturization, ultra-small distortion, good imaging quality, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Other features, objects and advantages of the present application will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings:

[0021] Figure 1 A schematic structural diagram of an optical imaging lens assembly according to Embodiment 1 of the present application is shown;

[0022] Figure 2 A schematic diagram of the optical path of the optical imaging lens assembly according to Embodiment 1 of the present application is shown;

[0023] FIG. 3A to FIG. 3C The astigmatism curve, distortion curve and MTF (modulation transfer function) imaging curve of the optical imaging lens group of Example 1 are respectively shown;

[0024] Figure 4 A schematic structural diagram of an optical imaging lens assembly according to Embodiment 2 of the present application is shown;

[0025] FIG. 5A to FIG. 5C The astigmatism curve, distortion curve and MTF imaging curve of the optical imaging lens group of Example 2 are respectively shown;

[0026] Figure 6 A schematic structural diagram of an optical imaging lens assembly according to Embodiment 3 of the present application is shown;

[0027] FIG. 7A to FIG. 7C The astigmatism curve, distortion curve and MTF imaging curve of the optical imaging lens group of Example 3 are respectively shown;

[0028] Figure 8 A schematic structural diagram of an optical imaging lens assembly according to Embodiment 4 of the present application is shown;

[0029] 9A to 9C The astigmatism curve, distortion curve and MTF imaging curve of the optical imaging lens group of Example 4 are respectively shown;

[0030] Fig.10 A schematic structural diagram of an optical imaging lens assembly according to Embodiment 5 of the present application is shown;

[0031] FIG. 11A to FIG. 11C The astigmatism curve, distortion curve and MTF imaging curve of the optical imaging lens group of Example 5 are respectively shown;

[0032] Fig.12 A schematic structural diagram of an optical imaging lens assembly according to Example 6 of the present application is shown;

[0033] FIG. 13A to FIG. 13C The astigmatism curve, distortion curve and MTF imaging curve of the optical imaging lens group of Example 6 are respectively shown;

[0034] Fig.14 A schematic structural diagram of an optical imaging lens assembly according to Embodiment 7 of the present application is shown;

[0035] FIG. 15A to FIG. 15C The astigmatism curve, distortion curve and MTF imaging curve of the optical imaging lens group of Example 7 are respectively shown;

[0036] Fig.16 shows a schematic structural diagram of an optical imaging lens assembly according to Example 8 of the present application; and

[0037] FIG. 17A to FIG. 17C The astigmatism curve, distortion curve and MTF imaging curve of the optical imaging lens group of Example 8 are shown respectively. DETAILED DESCRIPTION

[0038] 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.

[0039] 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.

[0040] 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.

[0041] 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.

[0042] 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.

[0043] 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.

[0044] 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.

[0045] The features, principles and other aspects of the present application are described in detail below.

[0046] According to an exemplary embodiment of the present application, the optical imaging lens group may include two prisms and five lenses with optical power, which are a first prism, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a second prism. The two prisms and the five lenses are arranged in sequence from the object side to the image side along the optical axis. There may be a spacing distance between the first prism and the first lens. There may be a spacing distance between any two adjacent lenses from the first lens to the fifth lens. There may be a spacing distance between the fifth lens and the second prism.

[0047] In an exemplary embodiment, the first prism may have a light incident surface, a first reflection surface, and a light exit surface; the first lens may have positive power or negative power, and its object side surface may be a convex surface; the incident light may be incident from the light incident surface of the first prism, and reflected by the first reflection surface, and emitted from the light exit surface of the first prism to the object side surface of the first lens; the second lens may have positive power or negative power; the third lens may have positive power or negative power, and its object side surface may be a concave surface, and the image side surface may be a convex surface; the fourth lens may have positive power or negative power; the fifth lens may have positive power or negative power; and the second prism may have a light incident surface, a second reflection surface, and a light exit surface; the incident light emitted from the image side surface of the fifth lens is incident on the light incident surface of the second prism, and reflected by the second reflection surface, and emitted from the light exit surface of the second prism. By controlling the surface shapes of the first lens and the third lens, it is beneficial to achieve the ultra-small distortion characteristics of the optical imaging lens group and to improve the imaging quality of the lens.

[0048] In an exemplary embodiment, the optical imaging lens assembly according to the present application may satisfy: |Dist.|<0.1%, where Dist. is the optical distortion of the optical imaging lens assembly. More specifically, Dist. may further satisfy: |Dist.|<0.02%. Satisfying |Dist.|<0.1% is conducive to meeting the requirement of ultra-small distortion of the lens, helps to reduce the aberration of the system, greatly improves the imaging quality of the system, and ultra-small optical distortion can restore the true appearance of the object to the greatest extent.

[0049] In an exemplary embodiment, the optical imaging lens group according to the present application may satisfy: -1.3mm<f34×tan(Semi-FOV)<-0.3mm, wherein f34 is the combined focal length of the third lens and the fourth lens, and Semi-FOV is half of the maximum field of view of the optical imaging lens group. More specifically, f34 and Semi-FOV may further satisfy: -1.2mm<f34×tan(Semi-FOV)<-0.5mm. Satisfying: -1.3mm<f34×tan(Semi-FOV)<-0.3mm helps to achieve the ultra-thin characteristics and ultra-small distortion characteristics of the system.

[0050] In an exemplary embodiment, the optical imaging lens assembly according to the present application may satisfy: -0.7<f4 / f12<-0.2, where f12 is the combined focal length of the first lens and the second lens, and f4 is the effective focal length of the fourth lens. When -0.7<f4 / f12<-0.2 is satisfied, the optical power of the system can be reasonably allocated so that the positive and negative spherical aberrations of the front lens and the rear lens cancel each other out.

[0051] In an exemplary embodiment, the optical imaging lens group according to the present application may satisfy: 0.2<R1 / f<0.7, where R1 is the radius of curvature of the object side of the first lens, and f is the total effective focal length of the optical imaging lens group. More specifically, R1 and f may further satisfy: 0.2<R1 / f<0.6. Satisfying 0.2<R1 / f<0.7 is conducive to adjusting the optical power distribution, shortening the total length of the system, and realizing module miniaturization, while balancing the system tolerance sensitivity.

[0052] In an exemplary embodiment, the optical imaging lens group according to the present application may satisfy: -0.7<(R9+R10) / f5<-0.2, wherein R9 is the radius of curvature of the object side of the fifth lens, R10 is the radius of curvature of the image side of the fifth lens, and f5 is the effective focal length of the fifth lens. More specifically, R9, R10 and f5 may further satisfy: -0.7<(R9+R10) / f5<-0.3. Satisfying -0.7<(R9+R10) / f5<-0.2 is conducive to better correction of chromatic aberration and improvement of imaging quality; at the same time, it is conducive to avoiding the problem of increased system tolerance sensitivity caused by excessive concentration of optical power and excessive curvature of the surface.

[0053] In an exemplary embodiment, the optical imaging lens group according to the present application may satisfy: -1.0<SAG32 / SAG52<-0.5, wherein SAG32 is the distance from the intersection of the image side surface of the third lens and the optical axis to the vertex of the effective radius of the image side surface of the third lens on the optical axis, and SAG52 is the distance from the intersection of the image side surface of the fifth lens and the optical axis to the vertex of the effective radius of the image side surface of the fifth lens on the optical axis. Satisfying -1.0<SAG32 / SAG52<-0.5 is conducive to better balancing the relationship between module miniaturization and relative illumination of the off-axis field of view.

[0054] In an exemplary embodiment, the optical imaging lens group according to the present application may satisfy: 0.3<ET1 / ET3<0.8, wherein ET1 is the edge thickness of the first lens, and ET3 is the edge thickness of the third lens. More specifically, ET1 and ET3 may further satisfy: 0.4<ET1 / ET3<0.8. Satisfying 0.3<ET1 / ET3<0.8 can reasonably control the space occupation of the first lens and the third lens, which is beneficial to ensure the assembly process of the lens and is beneficial to miniaturization of the optical imaging lens group.

[0055] In an exemplary embodiment, the optical imaging lens group according to the present application may satisfy: 0.3<ET5 / (ET4+ET5)<0.8, wherein ET4 is the edge thickness of the fourth lens, and ET5 is the edge thickness of the fifth lens. More specifically, ET4 and ET5 may further satisfy: 0.3<ET5 / (ET4+ET5)<0.7. Satisfying 0.3<ET5 / (ET4+ET5)<0.8 can effectively ensure the field curvature of the optical imaging lens group, so that the off-axis field of view of the optical imaging lens group obtains good imaging quality.

[0056] In an exemplary embodiment, the optical imaging lens assembly according to the present application may satisfy: 0.5<R5 / R6<1.0, where R5 is the radius of curvature of the object side surface of the third lens, and R6 is the radius of curvature of the image side surface of the third lens. More specifically, R5 and R6 may further satisfy: 0.6<R5 / R6<1.0. Satisfying 0.5<R5 / R6<1.0 can reduce the deflection angle of the light, so that the system can better achieve the deflection of the light path.

[0057] In an exemplary embodiment, the optical imaging lens group according to the present application may satisfy: 0.5<(CT2+CT4) / (CT1+CT3+CT5)<1.5, wherein CT1 is the center thickness of the first lens on the optical axis, CT2 is the center thickness of the second lens on the optical axis, CT3 is the center thickness of the third lens on the optical axis, CT4 is the center thickness of the fourth lens on the optical axis, and CT5 is the center thickness of the fifth lens on the optical axis. More specifically, CT2, CT4, CT1, CT3, and CT5 may further satisfy: 0.5<(CT2+CT4) / (CT1+CT3+CT5)<1.3. Satisfying 0.5<(CT2+CT4) / (CT1+CT3+CT5)<1.5 can control the distortion contribution of each field of view of the system within a reasonable range, thereby improving the imaging quality.

[0058] In an exemplary embodiment, the optical imaging lens group according to the present application may satisfy: 0.2<T12 / T23<0.7, wherein T12 is the spacing distance between the first lens and the second lens on the optical axis, and T23 is the spacing distance between the second lens and the third lens on the optical axis. More specifically, T12 and T23 may further satisfy: 0.2<T12 / T23<0.5. Satisfying 0.2<T12 / T23<0.7 can control the field curvature contribution of each field of view of the system to be within a reasonable range.

[0059] In an exemplary embodiment, the fourth lens may have a positive optical power. Such an optical power design of the fourth lens is conducive to making the optical imaging lens group have an ultra-thin characteristic.

[0060] In an exemplary embodiment, the fifth lens may have negative optical power, its object side surface may be convex, and its image side surface may be concave. Such optical power and surface shape design of the fifth lens is conducive to making the optical imaging lens group have ultra-thin characteristics.

[0061] In an exemplary embodiment, the optical imaging lens group according to the present application also includes an aperture arranged between the first prism and the first lens. Optionally, the above-mentioned optical imaging lens group may also include a filter for correcting color deviation and / or a protective glass for protecting the photosensitive element located on the imaging surface. The present application proposes an optical imaging lens group with the characteristics of telephoto, miniaturization, ultra-small distortion, ultra-thinness, etc. The optical imaging lens group according to the above-mentioned embodiment of the present application may adopt multiple lenses, such as the five lenses and two prisms described above. By reasonably allocating the optical focal length, surface shape, center thickness of each lens, axial spacing between each lens, position of the reflective surface, and spacing distance between the prism and the lens, etc., the incident light can be effectively converged, the total length of the optical imaging lens group can be reduced, and the processability of the optical imaging lens group can be improved, so that the optical imaging lens group is more conducive to production and processing.

[0062] In the embodiment of the present application, 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 the aspherical lens is that the curvature changes continuously from the center of the lens to the periphery of the lens. Unlike a spherical lens with 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.

[0063] 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 group 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 group is not limited to including five lenses. If necessary, the optical imaging lens group may also include other numbers of lenses.

[0064] Specific embodiments of the optical imaging lens assembly applicable to the above-mentioned embodiments will be further described below with reference to the accompanying drawings.

[0065] Example 1

[0066] The following reference Figures 1 to 3C Describe the optical imaging lens group according to Example 1 of the present application. Figure 1 A schematic structural diagram of an optical imaging lens group according to Example 1 of the present application is shown. Figure 2 A schematic diagram of the light path of the optical imaging lens group according to Example 1 of the present application is shown.

[0067] like Figure 1 As shown, the optical imaging lens group includes, from the object side to the image side, a first prism L1, an aperture STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a second prism L2, a filter E6 and an imaging surface S13.

[0068] The first prism L1 has a light incident surface P3, a first reflection surface P1 and a light exit surface P4. The first lens E1 has positive optical power, and its object side surface S1 is convex, and its image side surface S2 is concave. The second lens E2 has negative optical power, and its object side surface S3 is concave, and its image side surface S4 is convex. The third lens E3 has negative optical power, and its object side surface S5 is concave, and its image side surface S6 is convex. The fourth lens E4 has positive optical power, and its object side surface S7 is convex, and its image side surface S8 is convex. The fifth lens E5 has negative optical power, and its object side surface S9 is convex, and its image side surface S10 is concave. The second prism L2 has a light incident surface P5, a second reflection surface P2 and a light exit surface P6. The filter E6 has an object side surface S11 and an image side surface S12. As shown Figure 2 As shown, light a1, a2, and a3 from the object sequentially passes through the surfaces P3 to S12 and are finally imaged on the imaging surface S13.

[0069] Table 1 shows the basic parameters of the optical imaging lens assembly of Example 1, wherein the units of the radius of curvature, thickness / distance and focal length are all millimeters (mm).

[0070]

[0071] Table 1

[0072] In this example, the total effective focal length f of the optical imaging lens group is 7.02 mm, half of the maximum field of view Semi-FOV of the optical imaging lens group is 10.6°, half of the diagonal length ImgH of the effective pixel area on the imaging surface S13 of the optical imaging lens group is 1.31 mm, and the ratio f / EPD of the total effective focal length f of the optical imaging lens group to the entrance pupil diameter EPD of the optical imaging lens group is 3.95.

[0073] In Example 1, the object side surface and the image side surface of any lens among the first lens E1 to the fifth lens E5 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:

[0074]

[0075] 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. Table 2 below gives the high-order coefficients A4, A6, A8, A9, A10, A11, A12, A13, A14, A15, A16, A17, A18, A19, A20, A21, A22, A23, A24, A25, A26, A27, A28, A29, A30, A31, A32, A33, A34, A35, A36, A37, A38, A39, 10 , A 12 , A 14 , A 16 , A 18 and A 20 .

[0076] Face number A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 -3.0325E-02 7.3497E-01 -6.0693E+00 2.6444E+01 -6.6073E+01 1.0237E+02 -9.7895E+01 5.3106E+01 -1.2536E+01 S2 -3.1196E-01 5.6990E+00 -4.3971E+01 1.7020E+02 -3.7122E+02 4.7850E+02 -3.5979E+02 1.4459E+02 -2.3728E+01 S3 4.1731E-02 3.8557E+00 -3.9664E+01 1.6919E+02 -3.9155E+02 5.2683E+02 -4.0901E+02 1.6808E+02 -2.7834E+01 S4 -1.2751E-01 1.8797E+00 -1.5758E+01 7.5587E+01 -2.0731E+02 3.3535E+02 -3.1764E+02 1.6358E+02 -3.5520E+01 S5 -2.0488E-01 6.2173E-01 -1.1820E+00 8.5673E+00 -4.1224E+01 9.6550E+01 -1.1904E+02 7.5197E+01 -1.9311E+01 S6 1.9240E-01 -2.3137E+00 1.3547E+01 -4.4692E+01 9.0182E+01 -1.1282E+02 8.4760E+01 -3.4769E+01 5.9179E+00 S7 1.6340E-01 -2.0125E+00 1.1130E+01 -3.7092E+01 7.9913E+01 -1.1072E+02 9.4503E+01 -4.5007E+01 9.1229E+00 S8 2.0712E-01 -1.3281E+00 4.8679E+00 -1.2363E+01 2.2309E+01 -2.8592E+01 2.4593E+01 -1.2434E+01 2.7351E+00 S9 5.1769E-01 -1.2895E+00 3.9397E+00 -9.2425E+00 1.5182E+01 -1.7621E+01 1.4379E+01 -7.3326E+00 1.6909E+00 S10 6.2424E-01 -8.5652E-01 7.5214E-01 9.6767E-01 -5.6520E+00 1.1201E+01 -1.1710E+01 6.3506E+00 -1.4105E+00

[0077] Table 2

[0078] Figure 3A The astigmatism curve of the optical imaging lens group of Example 1 is shown, which represents the meridional image surface curvature and the sagittal image surface curvature. Figure 3B The distortion curve of the optical imaging lens group of Example 1 is shown, which represents the distortion magnitude values ​​corresponding to different image heights. Figure 3C The MTF imaging curve of the optical imaging lens group of Example 1 is shown, which indicates how the modulation degree of the optical imaging lens group changes with the spatial frequency. FIG. 3A to FIG. 3C It can be seen that the optical imaging lens assembly provided in Example 1 can achieve good imaging quality.

[0079] Example 2

[0080] The following reference Figures 4 to 5C The optical imaging lens assembly according to Embodiment 2 of the present application is described. In this embodiment and the following embodiments, for the sake of brevity, some descriptions similar to Embodiment 1 will be omitted. Figure 4 A schematic structural diagram of an optical imaging lens group according to Example 2 of the present application is shown.

[0081] like Figure 4 As shown, the optical imaging lens group includes, from the object side to the image side, a first prism L1, an aperture STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a second prism L2, a filter E6 and an imaging surface S13.

[0082] The first prism L1 has a light incident surface P3, a first reflection surface P1 and a light exit surface P4. The first lens E1 has positive focal power, and its object side surface S1 is convex, and its image side surface S2 is concave. The second lens E2 has positive focal power, and its object side surface S3 is convex, and its image side surface S4 is concave. The third lens E3 has negative focal power, and its object side surface S5 is concave, and its image side surface S6 is convex. The fourth lens E4 has positive focal power, and its object side surface S7 is convex, and its image side surface S8 is convex. The fifth lens E5 has negative focal power, and its object side surface S9 is convex, and its image side surface S10 is concave. The second prism L2 has a light incident surface P5, a second reflection surface P2 and a light exit surface P6. The filter E6 has an object side surface S11 and an image side surface S12. The light from the object passes through each surface P3 to S12 in sequence and is finally imaged on the imaging surface S13.

[0083] In this example, the total effective focal length f of the optical imaging lens group is 7.02 mm, half of the maximum field of view Semi-FOV of the optical imaging lens group is 10.6°, half of the diagonal length ImgH of the effective pixel area on the imaging surface S13 of the optical imaging lens group is 1.31 mm, and the ratio f / EPD of the total effective focal length f of the optical imaging lens group to the entrance pupil diameter EPD of the optical imaging lens group is 3.95.

[0084] Table 3 shows the basic parameters of the optical imaging lens assembly of Example 2, wherein the units of the radius of curvature, thickness / distance and focal length are all in millimeters (mm). Table 4 shows the high-order coefficients of each aspherical mirror surface that can be used in Example 2, wherein the surface type of each aspherical surface can be defined by the formula (1) given in the above Example 1.

[0085]

[0086] Table 3

[0087]

[0088]

[0089] Table 4

[0090] Figure 5A The astigmatism curve of the optical imaging lens group of Example 2 is shown, which represents the meridional image surface curvature and the sagittal image surface curvature. Figure 5B The distortion curve of the optical imaging lens group of Example 2 is shown, which represents the distortion magnitude values ​​corresponding to different image heights. Figure 5C The MTF imaging curve of the optical imaging lens group of Example 2 is shown, which indicates how the modulation degree of the optical imaging lens group changes with the spatial frequency. FIG. 5A to FIG. 5C It can be seen that the optical imaging lens assembly provided in Example 2 can achieve good imaging quality.

[0091] Example 3

[0092] The following reference Figures 6 to 7C Describe the optical imaging lens group according to Example 3 of the present application. Figure 6 A schematic structural diagram of an optical imaging lens group according to Example 3 of the present application is shown.

[0093] like Figure 6 As shown, the optical imaging lens group includes, from the object side to the image side, a first prism L1, an aperture STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a second prism L2, a filter E6 and an imaging surface S13.

[0094] The first prism L1 has a light incident surface P3, a first reflection surface P1 and a light exit surface P4. The first lens E1 has positive optical power, and its object side surface S1 is convex, and its image side surface S2 is convex. The second lens E2 has negative optical power, and its object side surface S3 is concave, and its image side surface S4 is convex. The third lens E3 has negative optical power, and its object side surface S5 is concave, and its image side surface S6 is convex. The fourth lens E4 has positive optical power, and its object side surface S7 is convex, and its image side surface S8 is convex. The fifth lens E5 has negative optical power, and its object side surface S9 is convex, and its image side surface S10 is concave. The second prism L2 has a light incident surface P5, a second reflection surface P2 and a light exit surface P6. The filter E6 has an object side surface S11 and an image side surface S12. The light from the object passes through each surface P3 to S12 in sequence and is finally imaged on the imaging surface S13.

[0095] In this example, the total effective focal length f of the optical imaging lens group is 7.00 mm, half of the maximum field of view Semi-FOV of the optical imaging lens group is 10.6°, half of the diagonal length ImgH of the effective pixel area on the imaging surface S13 of the optical imaging lens group is 1.31 mm, and the ratio f / EPD of the total effective focal length f of the optical imaging lens group to the entrance pupil diameter EPD of the optical imaging lens group is 3.95.

[0096] Table 5 shows the basic parameters of the optical imaging lens assembly of Example 3, wherein the units of the radius of curvature, thickness / distance and focal length are all in millimeters (mm). Table 6 shows the high-order coefficients of each aspherical mirror surface that can be used in Example 3, wherein the surface type of each aspherical surface can be defined by the formula (1) given in the above Example 1.

[0097]

[0098]

[0099] Table 5

[0100] Face number A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 -2.8308E-04 1.5224E-01 -1.0581E+00 5.6522E+00 -1.6905E+01 3.1116E+01 -3.4634E+01 2.1335E+01 -5.5992E+00 S2 -1.0905E-01 1.2194E+00 -8.8020E+00 3.5863E+01 -8.3531E+01 1.1461E+02 -9.0325E+01 3.7040E+01 -5.9858E+00 S3 -3.9756E-02 1.2042E+00 -1.0086E+01 4.1913E+01 -9.8890E+01 1.3527E+02 -1.0370E+02 3.9630E+01 -5.3609E+00 S4 -1.5536E-01 1.5916E+00 -7.8106E+00 2.7805E+01 -6.5665E+01 9.7004E+01 -8.5785E+01 4.1739E+01 -8.6619E+00 S5 -2.0868E-01 1.1988E+00 -5.3131E+00 1.9343E+01 -4.8766E+01 7.9304E+01 -7.9286E+01 4.4440E+01 -1.0727E+01 S6 -1.2471E-02 -2.6749E-02 -5.3574E-01 4.0398E+00 -1.0669E+01 1.5117E+01 -1.2760E+01 6.1675E+00 -1.3304E+00 S7 1.7188E-04 -7.8741E-02 4.9278E-02 6.0897E-01 -1.2519E-01 -3.4535E+00 6.1986E+00 -4.2588E+00 1.0638E+00 S8 1.4966E-01 -4.6927E-01 -1.4358E-01 3.4938E+00 -8.3075E+00 9.2208E+00 -4.9827E+00 9.7485E-01 5.6845E-02 S9 3.5504E-01 -2.1869E-01 -2.2518E+00 1.1352E+01 -2.6402E+01 3.5316E+01 -2.7649E+01 1.1784E+01 -2.1158E+00 S10 5.1070E-01 -4.8540E-01 -9.4123E-01 6.8666E+00 -1.8608E+01 2.8977E+01 -2.6705E+01 1.3524E+01 -2.9056E+00

[0101] Table 6

[0102] Fig. 7A The astigmatism curve of the optical imaging lens group of Example 3 is shown, which represents the meridional image surface curvature and the sagittal image surface curvature. Figure 7B The distortion curve of the optical imaging lens group of Example 3 is shown, which represents the distortion magnitude values ​​corresponding to different image heights. Figure 7C The MTF imaging curve of the optical imaging lens group of Example 3 is shown, which indicates how the modulation degree of the optical imaging lens group changes with the spatial frequency. FIG. 7A to FIG. 7C It can be seen that the optical imaging lens assembly provided in Example 3 can achieve good imaging quality.

[0103] Example 4

[0104] The following reference Figures 8 to 9C Describe the optical imaging lens group according to Example 4 of the present application. Figure 8 A schematic structural diagram of an optical imaging lens group according to Example 4 of the present application is shown.

[0105] like Figure 8 As shown, the optical imaging lens group includes, from the object side to the image side, the optical imaging lens group includes, from the object side to the image side, a first prism L1, an aperture STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a second prism L2, a filter E6 and an imaging surface S13.

[0106] The first prism L1 has a light incident surface P3, a first reflection surface P1 and a light exit surface P4. The first lens E1 has positive optical power, its object side surface S1 is convex, and the image side surface S2 is concave. The second lens E2 has negative optical power, its object side surface S3 is concave, and the image side surface S4 is convex. The third lens E3 has positive optical power, its object side surface S5 is concave, and the image side surface S6 is convex. The fourth lens E4 has positive optical power, its object side surface S7 is convex, and the image side surface S8 is convex. The fifth lens E5 has negative optical power, its object side surface S9 is convex, and the image side surface S10 is concave. The second prism L2 has a light incident surface P5, a second reflection surface P2 and a light exit surface P6. The filter E6 has an object side surface S11 and an image side surface S12. The light from the object passes through each surface P3 to S12 in sequence and is finally imaged on the imaging surface S13.

[0107] In this example, the total effective focal length f of the optical imaging lens group is 7.00 mm, half of the maximum field of view Semi-FOV of the optical imaging lens group is 10.6°, half of the diagonal length ImgH of the effective pixel area on the imaging surface S13 of the optical imaging lens group is 1.31 mm, and the ratio f / EPD of the total effective focal length f of the optical imaging lens group to the entrance pupil diameter EPD of the optical imaging lens group is 3.95.

[0108] Table 7 shows the basic parameters of the optical imaging lens assembly of Example 4, wherein the units of the radius of curvature, thickness / distance and focal length are all in millimeters (mm). Table 8 shows the high-order coefficients of each aspherical mirror surface that can be used in Example 4, wherein the surface type of each aspherical surface can be defined by the formula (1) given in the above Example 1.

[0109]

[0110] Table 7

[0111]

[0112]

[0113] Table 8

[0114] Fig.9A The astigmatism curve of the optical imaging lens group of Example 4 is shown, which represents the meridional image surface curvature and the sagittal image surface curvature. Fig. 9B The distortion curve of the optical imaging lens group of Example 4 is shown, which represents the distortion magnitude values ​​corresponding to different image heights. Fig. 9C The MTF imaging curve of the optical imaging lens group of Example 4 is shown, which indicates how the modulation degree of the optical imaging lens group changes with the spatial frequency. 9A to 9C It can be seen that the optical imaging lens group provided in Example 4 can achieve good imaging quality.

[0115] Example 5

[0116] The following reference Figures 10 to 11C Describe the optical imaging lens group according to Example 5 of the present application. Fig.10 A schematic structural diagram of an optical imaging lens group according to Example 5 of the present application is shown.

[0117] like Fig.10 As shown, the optical imaging lens group includes, from the object side to the image side, the optical imaging lens group includes, from the object side to the image side, a first prism L1, an aperture STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a second prism L2, a filter E6 and an imaging surface S13.

[0118] The first prism L1 has a light incident surface P3, a first reflection surface P1 and a light exit surface P4. The first lens E1 has positive optical power, its object side surface S1 is convex, and the image side surface S2 is concave. The second lens E2 has positive optical power, its object side surface S3 is concave, and the image side surface S4 is convex. The third lens E3 has negative optical power, its object side surface S5 is concave, and the image side surface S6 is convex. The fourth lens E4 has positive optical power, its object side surface S7 is concave, and the image side surface S8 is convex. The fifth lens E5 has negative optical power, its object side surface S9 is convex, and the image side surface S10 is concave. The second prism L2 has a light incident surface P5, a second reflection surface P2 and a light exit surface P6. The filter E6 has an object side surface S11 and an image side surface S12. The light from the object passes through each surface P3 to S12 in sequence and is finally imaged on the imaging surface S13.

[0119] In this example, the total effective focal length f of the optical imaging lens group is 7.00 mm, half of the maximum field of view Semi-FOV of the optical imaging lens group is 10.6°, half of the diagonal length ImgH of the effective pixel area on the imaging surface S13 of the optical imaging lens group is 1.31 mm, and the ratio f / EPD of the total effective focal length f of the optical imaging lens group to the entrance pupil diameter EPD of the optical imaging lens group is 3.95.

[0120] Table 9 shows the basic parameters of the optical imaging lens assembly of Example 5, wherein the units of the radius of curvature, thickness / distance and focal length are all in millimeters (mm). Table 10 shows the high-order coefficients of each aspherical mirror surface that can be used in Example 5, wherein the surface type of each aspherical surface can be defined by the formula (1) given in the above Example 1.

[0121]

[0122]

[0123] Table 9

[0124] Face number A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 -1.5252E-02 3.1560E-01 -2.5785E+00 1.2677E+01 -3.4996E+01 5.9017E+01 -6.0553E+01 3.4813E+01 -8.6303E+00 S2 -1.6658E-01 2.5593E+00 -2.0267E+01 8.3747E+01 -1.9395E+02 2.6175E+02 -2.0172E+02 8.0447E+01 -1.2408E+01 S3 -6.1420E-02 2.3983E+00 -2.1457E+01 9.0351E+01 -2.1151E+02 2.8674E+02 -2.2001E+02 8.6053E+01 -1.2560E+01 S4 -5.1540E-02 1.4220E+00 -9.8831E+00 4.1538E+01 -1.0634E+02 1.6611E+02 -1.5483E+02 7.9521E+01 -1.7430E+01 S5 -1.8617E-01 1.2766E+00 -6.6641E+00 2.6991E+01 -7.4101E+01 1.3005E+02 -1.3902E+02 8.2418E+01 -2.0798E+01 S6 -1.3985E-02 -4.2868E-01 2.7598E+00 -7.7614E+00 1.2920E+01 -1.3088E+01 7.3009E+00 8.2418E+01 -5.6459E-02 S7 8.3150E-02 -9.7341E-01 5.0193E+00 -1.5604E+01 3.3395E+01 -4.8063E+01 4.3115E+01 -2.1477E+01 4.5102E+00 S8 1.6549E-01 -7.0129E-01 1.5406E+00 -2.6837E+00 5.1893E+00 -9.2138E+00 1.0408E+01 -6.2076E+00 1.4944E+00 S9 2.9056E-01 6.3786E-02 -1.9682E+00 7.8986E+00 -1.7844E+01 2.4870E+01 -2.0959E+01 9.7683E+00 -1.9272E+00 S10 5.3605E-01 -6.2239E-01 9.6584E-02 2.4559E+00 -7.8748E+00 1.3396E+01 -1.3401E+01 7.3692E+00 -1.7132E+00

[0125] Table 10

[0126] Fig.11A The astigmatism curve of the optical imaging lens group of Example 5 is shown, which represents the meridional image surface curvature and the sagittal image surface curvature. Fig. 11B The distortion curve of the optical imaging lens group of Example 5 is shown, which represents the distortion magnitude values ​​corresponding to different image heights. Fig. 11C The MTF imaging curve of the optical imaging lens group of Example 5 is shown, which indicates how the modulation degree of the optical imaging lens group changes with the spatial frequency. FIG. 11A to FIG. 11C It can be seen that the optical imaging lens group provided in Example 5 can achieve good imaging quality.

[0127] Example 6

[0128] The following reference Figures 12 to 13C Describe the optical imaging lens group according to Example 6 of the present application. Fig.12 A schematic structural diagram of an optical imaging lens group according to Example 6 of the present application is shown.

[0129] like Fig.12 As shown, the optical imaging lens group includes, from the object side to the image side, a first prism L1, an aperture STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a second prism L2, a filter E6 and an imaging surface S13.

[0130] The first prism L1 has a light incident surface P3, a first reflection surface P1 and a light exit surface P4. The first lens E1 has positive focal power, and its object side surface S1 is convex, and the image side surface S2 is concave. The second lens E2 has positive focal power, and its object side surface S3 is concave, and the image side surface S4 is convex. The third lens E3 has negative focal power, and its object side surface S5 is concave, and the image side surface S6 is convex. The fourth lens E4 has positive focal power, and its object side surface S7 is convex, and the image side surface S8 is concave. The fifth lens E5 has negative focal power, and its object side surface S9 is convex, and the image side surface S10 is concave. The second prism L2 has a light incident surface P5, a second reflection surface P2 and a light exit surface P6. The filter E6 has an object side surface S11 and an image side surface S12. The light from the object passes through each surface P3 to S12 in sequence and is finally imaged on the imaging surface S13.

[0131] In this example, the total effective focal length f of the optical imaging lens group is 7.00 mm, half of the maximum field of view Semi-FOV of the optical imaging lens group is 10.6°, half of the diagonal length ImgH of the effective pixel area on the imaging surface S13 of the optical imaging lens group is 1.31 mm, and the ratio f / EPD of the total effective focal length f of the optical imaging lens group to the entrance pupil diameter EPD of the optical imaging lens group is 3.95.

[0132] Table 11 shows the basic parameters of the optical imaging lens assembly of Example 6, wherein the units of the radius of curvature, thickness / distance and focal length are all in millimeters (mm). Table 12 shows the high-order coefficients of each aspherical mirror surface that can be used in Example 6, wherein the surface type of each aspherical surface can be defined by the formula (1) given in the above Example 1.

[0133]

[0134] Table 11

[0135]

[0136]

[0137] Table 12

[0138] Fig.13A The astigmatism curve of the optical imaging lens group of Example 6 is shown, which represents the meridional image surface curvature and the sagittal image surface curvature. Fig. 13B The distortion curve of the optical imaging lens group of Example 6 is shown, which represents the distortion magnitude values ​​corresponding to different image heights. Fig. 13C The MTF imaging curve of the optical imaging lens group of Example 6 is shown, which indicates how the modulation degree of the optical imaging lens group changes with the spatial frequency. FIG. 13A to FIG. 13C It can be seen that the optical imaging lens group provided in Example 6 can achieve good imaging quality.

[0139] Example 7

[0140] The following reference Figures 14 to 15C Describe the optical imaging lens group according to Example 7 of the present application. Fig.14 A schematic structural diagram of an optical imaging lens group according to Example 7 of the present application is shown.

[0141] like Fig.14 As shown, the optical imaging lens group includes, from the object side to the image side, a first prism L1, an aperture STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a second prism L2, a filter E6 and an imaging surface S13.

[0142] The first prism L1 has a light incident surface P3, a first reflection surface P1 and a light exit surface P4. The first lens E1 has positive and negative optical power, and its object side surface S1 is convex, and the image side surface S2 is concave. The second lens E2 has positive optical power, and its object side surface S3 is convex, and the image side surface S4 is convex. The third lens E3 has negative optical power, and its object side surface S5 is concave, and the image side surface S6 is convex. The fourth lens E4 has positive optical power, and its object side surface S7 is convex, and the image side surface S8 is convex. The fifth lens E5 has negative optical power, and its object side surface S9 is convex, and the image side surface S10 is concave. The second prism L2 has a light incident surface P5, a second reflection surface P2 and a light exit surface P6. The filter E6 has an object side surface S11 and an image side surface S12. The light from the object passes through each surface P3 to S12 in sequence and is finally imaged on the imaging surface S13.

[0143] In this example, the total effective focal length f of the optical imaging lens group is 7.00 mm, half of the maximum field of view Semi-FOV of the optical imaging lens group is 10.6°, half of the diagonal length ImgH of the effective pixel area on the imaging surface S13 of the optical imaging lens group is 1.31 mm, and the ratio f / EPD of the total effective focal length f of the optical imaging lens group to the entrance pupil diameter EPD of the optical imaging lens group is 3.95.

[0144] Table 13 shows the basic parameters of the optical imaging lens assembly of Example 7, wherein the units of the radius of curvature, thickness / distance and focal length are all in millimeters (mm). Table 14 shows the high-order coefficients of each aspherical mirror surface that can be used in Example 7, wherein the surface type of each aspherical surface can be defined by the formula (1) given in the above Example 1.

[0145]

[0146] Table 13

[0147] Face number A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 2.3756E-02 6.3146E-02 -6.4686E-01 4.3844E+00 -1.3801E+01 2.5306E+01 -2.7906E+01 1.7156E+01 -4.5181E+00 S2 -7.8369E-02 7.4357E-01 -7.0502E+00 3.3702E+01 -8.5434E+01 1.2421E+02 -1.0363E+02 4.5837E+01 -8.3073E+00 S3 7.9488E-02 1.8670E-01 -5.5856E+00 2.9191E+01 -7.5763E+01 1.0989E+02 -8.8930E+01 3.6627E+01 -5.7434E+00 S4 1.8459E-02 4.9692E-01 -2.7593E+00 1.0811E+01 -2.8823E+01 4.7906E+01 -4.6941E+01 2.4964E+01 -5.6050E+00 S5 -1.6609E-01 8.6788E-01 -3.3424E+00 1.0499E+01 -2.4256E+01 3.8467E+01 -3.8867E+01 2.2331E+01 -5.5409E+00 S6 1.1221E-02 -1.1801E-01 2.5903E-04 2.2855E+00 -7.7022E+00 1.2085E+01 -1.0578E+01 5.0525E+00 -1.0419E+00 S7 3.7069E-03 -1.1759E-01 1.3131E-01 1.5306E+00 -5.5379E+00 8.2120E+00 -6.1984E+00 2.3032E+00 -3.2474E-01 S8 9.2994E-02 -2.0318E-01 -4.2460E-01 3.0276E+00 -7.6045E+00 1.0769E+01 -8.8146E+00 3.8432E+00 -6.8611E-01 S9 3.4684E-01 -1.7308E-01 -1.2399E+00 5.4470E+00 -1.2248E+01 1.7564E+01 -1.5623E+01 7.7033E+00 -1.5913E+00 S10 4.8738E-01 -4.8072E-01 -2.2615E-01 2.3905E+00 -5.8312E+00 9.0369E+00 -9.2144E+00 5.4095E+00 -1.3469E+00

[0148] Table 14

[0149] Fig.15A The astigmatism curve of the optical imaging lens group of Example 7 is shown, which represents the meridional image surface curvature and the sagittal image surface curvature. Fig. 15B The distortion curve of the optical imaging lens group of Example 7 is shown, which represents the distortion magnitude values ​​corresponding to different image heights. Fig. 15C The MTF imaging curve of the optical imaging lens group of Example 7 is shown, which indicates how the modulation degree of the optical imaging lens group changes with the spatial frequency. FIG. 15A to FIG. 15C It can be seen that the optical imaging lens group provided in Example 7 can achieve good imaging quality.

[0150] Example 8

[0151] The following reference Figures 16 to 17C Describe the optical imaging lens group according to Example 8 of the present application. Fig.16 A schematic structural diagram of an optical imaging lens group according to Example 8 of the present application is shown.

[0152] like Fig.16 As shown, the optical imaging lens group includes, from the object side to the image side, a first prism L1, an aperture STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a second prism L2, a filter E6 and an imaging surface S13.

[0153] The first prism L1 has a light incident surface P3, a first reflection surface P1 and a light exit surface P4. The first lens E1 has positive optical power, its object side surface S1 is convex, and the image side surface S2 is concave. The second lens E2 has positive optical power, its object side surface S3 is concave, and the image side surface S4 is convex. The third lens E3 has negative optical power, its object side surface S5 is concave, and the image side surface S6 is convex. The fourth lens E4 has positive optical power, its object side surface S7 is convex, and the image side surface S8 is convex. The fifth lens E5 has negative optical power, its object side surface S9 is convex, and the image side surface S10 is concave. The second prism L2 has a light incident surface P5, a second reflection surface P2 and a light exit surface P6. The filter E6 has an object side surface S11 and an image side surface S12. The light from the object passes through each surface P3 to S12 in sequence and is finally imaged on the imaging surface S13.

[0154] In this example, the total effective focal length f of the optical imaging lens group is 7.00 mm, half of the maximum field of view Semi-FOV of the optical imaging lens group is 10.6°, half of the diagonal length ImgH of the effective pixel area on the imaging surface S13 of the optical imaging lens group is 1.31 mm, and the ratio f / EPD of the total effective focal length f of the optical imaging lens group to the entrance pupil diameter EPD of the optical imaging lens group is 3.95.

[0155] Table 15 shows the basic parameters of the optical imaging lens assembly of Example 8, wherein the units of the radius of curvature, thickness / distance and focal length are all in millimeters (mm). Table 16 shows the high-order coefficients of each aspherical mirror surface that can be used in Example 8, wherein the surface type of each aspherical surface can be defined by the formula (1) given in the above Example 1.

[0156]

[0157] Table 15

[0158] Face number A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 -1.3460E-02 1.8469E-01 -1.0586E+00 5.0352E+00 -1.4446E+01 2.6174E+01 -2.9048E+01 1.7963E+01 -4.7418E+00 S2 -1.1942E-01 1.3085E+00 -9.2304E+00 3.7042E+01 -8.5352E+01 1.1647E+02 -9.1996E+01 3.8152E+01 -6.2831E+00 S3 -1.4747E-02 1.2511E+00 -1.2266E+01 5.4717E+01 -1.3625E+02 1.9905E+02 -1.6846E+02 7.5782E+01 -1.3865E+01 S4 6.3713E-02 5.3590E-01 -6.7143E+00 3.5652E+01 -1.0159E+02 1.6769E+02 -1.6118E+02 8.4076E+01 -1.8467E+01 S5 -9.1310E-02 1.5652E-01 -1.8271E+00 1.4296E+01 -4.9670E+01 9.4541E+01 -1.0323E+02 6.0956E+01 -1.5151E+01 S6 -9.0162E-04 1.0734E-01 -1.2110E+00 4.9425E+00 -9.6533E+00 1.0566E+01 -7.1522E+00 3.0989E+00 -7.0812E-01 S7 -4.6420E-02 4.5496E-01 -2.2523E+00 5.7066E+00 -6.2889E+00 -1.4292E-01 6.8024E+00 -5.8077E+00 1.5757E+00 S8 1.0139E-01 -1.2705E-01 -1.2042E+00 5.3857E+00 -1.0398E+01 1.0630E+01 -5.4625E+00 9.9380E-01 7.8897E-02 S9 3.5891E-01 -8.3569E-02 -2.6217E+00 1.1707E+01 -2.6074E+01 3.4050E+01 -2.6167E+01 1.0960E+01 -1.9355E+00 S10 4.8984E-01 -4.3353E-01 -1.0574E+00 7.2722E+00 -1.9853E+01 3.1257E+01 -2.9036E+01 1.4778E+01 -3.1866E+00

[0159] Table 16

[0160] Fig.17A The astigmatism curve of the optical imaging lens group of Example 8 is shown, which represents the meridional image surface curvature and the sagittal image surface curvature. Fig. 17B The distortion curve of the optical imaging lens group of Example 8 is shown, which represents the distortion magnitude values ​​corresponding to different image heights. Fig. 17C The MTF imaging curve of the optical imaging lens group of Example 8 is shown, which indicates how the modulation degree of the optical imaging lens group changes with the spatial frequency. 17A to 17C It can be seen that the optical imaging lens group provided in Example 8 can achieve good imaging quality.

[0161] In summary, Examples 1 to 8 respectively satisfy the relationships shown in Table 17.

[0162] Conditional / Example 1 2 3 4 5 6 7 8 |Dist.| 0.011 0.011 0.007 0.010 0.007 0.002 0.005 0.008 f34×tan(Semi-FOV)(mm) -0.71 -0.73 -0.79 -0.59 -0.89 -1.16 -0.85 -0.82 f4 / f12 -0.23 -0.23 -0.41 -0.22 -0.57 -0.62 -0.48 -0.36 R1 / f 0.31 0.30 0.45 0.35 0.35 0.48 0.44 0.38 (R9+R10) / f5 -0.50 -0.49 -0.57 -0.66 -0.47 -0.34 -0.52 -0.50 SAG32 / SAG52 -0.62 -0.62 -0.75 -0.80 -0.87 -0.97 -0.70 -0.57 ET1 / ET3 0.71 0.70 0.57 0.66 0.50 0.45 0.63 0.72 ET5 / (ET4+ET5) 0.37 0.41 0.41 0.46 0.66 0.45 0.44 0.38 R5 / R6 0.82 0.77 0.70 0.96 0.81 0.71 0.66 0.68 (CT2+CT4) / (CT1+CT3+CT5) 1.26 1.13 1.02 1.01 0.60 0.92 1.05 1.06 T12 / T23 0.38 0.34 0.31 0.30 0.28 0.29 0.30 0.46

[0163] Table 17

[0164] The present application also provides an imaging device, whose electronic photosensitive element can be a photosensitive coupled device (CCD) or a complementary metal oxide semiconductor element (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 group described above.

[0165] 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 assembly, characterized in that: Along the optical axis from the object side to the image side, they include: a first prism having a first reflecting surface; A first lens having optical power, whose object side surface is convex; a second lens having optical power; A third lens having optical power, whose object side surface is concave and image side surface is convex; a fourth lens having positive refractive power; a fifth lens element having negative optical power, whose object-side surface is convex and whose image-side surface is concave; and a second prism having a second reflecting surface; Wherein, the first lens has positive optical power, and the second lens has negative optical power; or, the second lens has positive optical power, and the third lens has negative optical power; The number of lenses with optical power in the optical imaging lens group is five; The optical distortion Dist. of the optical imaging lens group satisfies: |Dist.|<0.1%; The curvature radius R9 of the object side surface of the fifth lens, the curvature radius R10 of the image side surface of the fifth lens, and the effective focal length f5 of the fifth lens satisfy: -0.7<(R9+R10) / f5<-0.3; The combined focal length f12 of the first lens and the second lens and the effective focal length f4 of the fourth lens satisfy: -0.62≤f4 / f12<-0.

2.

2. The optical imaging lens assembly according to claim 1, wherein: The combined focal length f34 of the third lens and the fourth lens and half of the maximum field of view Semi-FOV of the optical imaging lens group satisfy the following: -1.2 mm<f34×tan(Semi-FOV)≤-0.59 mm.

3. The optical imaging lens assembly according to claim 1, characterized in that: The curvature radius R1 of the object side surface of the first lens and the total effective focal length f of the optical imaging lens group satisfy: 0.30≤R1 / f≤0.

48.

4. The optical imaging lens assembly according to claim 1, characterized in that: The distance SAG32 from the intersection of the image side surface of the third lens and the optical axis to the vertex of the effective radius of the image side surface of the third lens on the optical axis and the distance SAG52 from the intersection of the image side surface of the fifth lens and the optical axis to the vertex of the effective radius of the image side surface of the fifth lens on the optical axis satisfy: -1.0<SAG32 / SAG52≤-0.

57.

5. The optical imaging lens assembly according to claim 1, characterized in that: The edge thickness ET1 of the first lens and the edge thickness ET3 of the third lens satisfy: 0.45≤ET1 / ET3≤0.

72.

6. The optical imaging lens assembly according to claim 1, characterized in that: The edge thickness ET4 of the fourth lens and the edge thickness ET5 of the fifth lens satisfy: 0.37≤ET5 / (ET4+ET5)<0.

7.

7. The optical imaging lens assembly according to claim 1, characterized in that: 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 satisfy: 0.66≤R5 / R6<1.

0.

8. The optical imaging lens assembly according to claim 1, characterized in that: The center thickness CT1 of the first lens on the optical axis, the center thickness CT2 of the second lens on the optical axis, the center thickness CT3 of the third lens on the optical axis, the center thickness CT4 of the fourth lens on the optical axis, and the center thickness CT5 of the fifth lens on the optical axis satisfy: 0.60≤(CT2+CT4) / (CT1+CT3+CT5)<1.

3.

9. The optical imaging lens assembly according to claim 1, characterized in that: A distance T12 between the first lens and the second lens on the optical axis and a distance T23 between the second lens and the third lens on the optical axis satisfy: 0.28≤T12 / T23<0.5.

Images