Large-aperture high-pixel upright telephoto macro lens

Abstract

The utility model provides a large-aperture high-pixel upright telephoto macro lens, which comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens which are sequentially arranged from an object side to an image side along an optical axis, in the application, the focal powers of the first to sixth lenses follow positive-negative positive-negative positive-negative arrangement, so that through reasonable distribution of the focal powers, the correction effect of spherical aberration and chromatic aberration can be improved, the imaging quality can be improved, and the large aperture effect of the lens can be realized; moreover, in the application, the rise P4S1 of the object side surface of the fourth lens meets the condition that P4S1 is greater than or equal to-0.6 mm and less than or equal to 0mm, so that the range can control the rise of the fourth lens well, and meanwhile, the lens has relatively good resolution and tolerance value, thereby facilitating the realization of a near-focus function of the lens, and specifically realizing 5cm macro focusing; therefore, according to the upright telephoto lens provided by the invention, through optimizing the lens structure, the overall size of the lens can be controlled in a proper range, and the functions of large aperture and far and near focus are realized.

Description

Technical Field

[0001] The utility model relates to the technical field of camera modules, in particular to a large-aperture high-pixel upright telephoto macro lens. Background Art

[0002] With the development of mobile phone technology, the market requirements for the structure and function of mobile phone camera modules are becoming higher and higher.

[0003] At present, the telephoto lens of a mobile phone has a long focal length, which requires a long travel for close-focus shooting, which will correspondingly increase the thickness of the camera module and the mobile phone module. For ease of use, many mobile phones can only use periscope lens solutions. However, the periscope lens has the disadvantage that the aperture cannot be made larger, that is, it cannot have the characteristics of a large aperture. Therefore, it is difficult for existing mobile phone camera modules to reduce the structural size while having multiple optical functions.

[0004] Therefore, it is necessary to provide a technical solution that can optimize the structure of the camera module so that it can have a close-focus shooting function while controlling the overall size of the module within an appropriate range and having a large aperture function. Utility Model Content

[0005] The utility model provides a large aperture high pixel upright telephoto macro lens to solve the problem that the existing mobile phone camera module is difficult to have multiple optical functions while reducing the structural size.

[0006] The technical solution adopted by the utility model is as follows: a large aperture high pixel upright telephoto macro lens, comprising a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens arranged in sequence from the object side to the image side along the optical axis; the first lens has a positive optical power, and the object side surface of the first lens is a convex surface at the near optical axis, and the image side surface of the first lens is a concave surface at the near optical axis; the second lens has a negative optical power, and the object side surface of the second lens is a concave surface at the near optical axis, and the image side surface of the second lens is a concave surface at the near optical axis; the third lens has a positive optical power, The object side surface of the third lens is convex at the near optical axis, and the image side surface of the third lens is convex at the near optical axis; the fourth lens has negative optical power, and the object side surface of the fourth lens is concave at the near optical axis, and the image side surface of the fourth lens is concave at the near optical axis; the fifth lens has positive optical power, and the object side surface of the fifth lens is convex at the near optical axis, and the image side surface of the fifth lens is convex at the near optical axis; the sixth lens has negative optical power, and the object side surface of the sixth lens is concave at the near optical axis, and the image side surface of the sixth lens is convex at the near optical axis;

[0007] The sagittal height P4S1 of the object side of the fourth lens satisfies the condition: -0.6mm≤P4S1≤0mm.

[0008] In one embodiment, the sagittal height P2S2 of the image side of the second lens satisfies the condition: 0.3mm≤P2S2≤0.9mm.

[0009] In one embodiment, the sagittal height P6S1 of the object side of the sixth lens satisfies the condition: -2mm≤P6S1≤-0.3mm.

[0010] In one embodiment, the refractive index n1 of the first lens satisfies the condition 1.45≤n1≤1.7; the dispersion coefficient V1 of the first lens satisfies the condition 45≤V1≤90.

[0011] In one embodiment, a curvature radius P1R1 of the object side surface and a curvature radius P1R2 of the image side surface of the first lens satisfy the following condition: 130 mm ≤ |P1R2 / P1R1| ≤ 175 mm.

[0012] In one embodiment, the focal length f1 of the first lens and the focal length f2 of the second lens satisfy the following condition: -4 mm ≤ f1 + f2 ≤ -1.5 mm.

[0013] In one embodiment, the total optical length TTL of the large aperture high pixel vertical telephoto macro lens and the focal length f′ of the large aperture high pixel vertical telephoto macro lens satisfy the following conditional expression: TTL / f′<1.1.

[0014] In one embodiment, the thickness H1 of the first lens and the thickness H2 of the second lens satisfy the following condition: 5≤H1 / H2≤9.

[0015] In one embodiment, a distance MICROH34 between the third lens and the fourth lens in near focus and a distance INFH34 between the third lens and the fourth lens in far focus satisfy the following conditional expression: 0.3≤MICROH34-INFH34.

[0016] In one embodiment, the effective aperture P1D1 of the first lens object side surface and the effective aperture P4D1 of the fourth lens object side surface satisfy the following condition: 0.5≤P1D1-P4D1≤1.5.

[0017] The beneficial effects of the utility model are:

[0018] The large aperture high-pixel upright telephoto macro lens of the present application comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens which are arranged in sequence from the object side to the image side along the optical axis; the first lens has a positive focal power, and the object side surface of the first lens is a convex surface at the near optical axis, and the image side surface of the first lens is a concave surface at the near optical axis; the second lens has a negative focal power, and the object side surface of the second lens is a concave surface at the near optical axis, and the image side surface of the second lens is a concave surface at the near optical axis; the third lens has a positive focal power, and the object side surface of the third lens is a convex surface at the near optical axis, and the image side surface of the third lens is a convex surface at the near optical axis; the fourth lens has a negative focal power, and the object side surface of the fourth lens is a concave surface at the near optical axis, and the image side surface of the fourth lens is a concave surface at the near optical axis; the fifth lens has a positive focal power, and the object side surface of the fifth lens is a convex surface at the near optical axis, and the image side surface of the fifth lens is a concave surface at the near optical axis. The sixth lens has a negative optical power, and the object side of the sixth lens is concave at the near optical axis, and the image side of the sixth lens is convex at the near optical axis; in the present application, the optical power of the first lens to the sixth lens follows the positive-negative positive-negative positive-negative arrangement, so that by reasonably allocating the optical power, it is beneficial to improve the correction effect of spherical aberration and chromatic aberration, improve the imaging quality, and help the lens achieve a large aperture effect; moreover, in the present application, the sagitta P4S1 of the object side of the fourth lens satisfies the condition: -0.6mm≤P4S1≤0mm, this range can control the sagitta of the fourth lens while allowing the lens to have better resolution and tolerance value, which helps the lens to achieve a near focus function, specifically a 5cm macro focus; therefore, the upright telephoto lens provided in the present application can control the overall size of the lens within a suitable range and achieve a large aperture and near and far focus functions by optimizing the lens structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present invention, but should not constitute a limitation to the present invention. In the accompanying drawings:

[0020] Figure 1 A schematic structural diagram of a large aperture, high pixel, upright telephoto macro lens provided in the first embodiment of the utility model;

[0021] Figure 2 This is a graph of the MTF (Modulation Transfer Function) of the first embodiment of the utility model when the object distance is infinite;

[0022] Figure 3 This is a graph of the MTF (modulation transfer function) of the first embodiment of the utility model when the object distance is 5 cm;

[0023] Figure 4 This is a relative illumination curve diagram of the first embodiment of the utility model;

[0024] Figure 5 The field curvature diagram and distortion curve diagram of the first embodiment of the utility model;

[0025] Figure 6 This is an axial aberration diagram of the first embodiment of the utility model;

[0026] Figure 7 The vertical axis chromatic aberration curve diagram of the first embodiment of the utility model;

[0027] Figure 8 A schematic diagram of the structure of a large aperture, high pixel, upright telephoto macro lens provided in the second embodiment of the utility model;

[0028] Fig. 9 This is a graph of the MTF (Modulation Transfer Function) of the second embodiment of the utility model when the object distance is infinite;

[0029] Fig.10 This is a graph of the MTF (modulation transfer function) of the second embodiment of the utility model when the object distance is 5 cm;

[0030] Fig.11 This is a relative illumination curve diagram of the second embodiment of the present utility model;

[0031] Fig.12 The field curvature diagram and distortion curve diagram of the second embodiment of the utility model;

[0032] Fig.13 This is an axial aberration diagram of the second embodiment of the utility model;

[0033] Fig.14 The vertical axis chromatic aberration curve diagram of the second embodiment of the utility model;

[0034] Fig.15 A schematic diagram of the structure of a large aperture, high pixel, upright telephoto macro lens provided in Embodiment 3 of the present utility model;

[0035] Fig.16 This is a graph of the MTF (Modulation Transfer Function) of Embodiment 3 of the present utility model when the object distance is infinite;

[0036] Fig.17 This is a graph of the MTF (modulation transfer function) of the third embodiment of the utility model when the object distance is 5 cm;

[0037] Fig.18 This is a relative illumination curve diagram of the third embodiment of the present utility model;

[0038] Fig.19 The field curvature diagram and distortion curve diagram of the third embodiment of the present utility model;

[0039] Fig. 20 This is an axial aberration diagram of the third embodiment of the utility model;

[0040] Fig.21 This is a vertical axis chromatic aberration curve diagram of Example 3 of the present utility model.

[0041] Notes on the accompanying drawings: P1, first lens; P2, second lens; P3, third lens; P4, fourth lens; P5, fifth lens; P6, sixth lens; 101, filter; 102, aperture; 17, imaging surface. DETAILED DESCRIPTION

[0042] The specific implementation of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the present invention, and is not used to limit the present invention.

[0043] To facilitate understanding, before describing the various embodiments of the present application in conjunction with the accompanying drawings, the technical terms involved in the present application are first explained and described.

[0044] Focal length (f), also known as focal length, is a measure of the convergence or divergence of light in an optical lens. It refers to the vertical distance from the optical center of a lens or lens group to the focal plane when an infinitely distant scene forms a clear image on the focal plane through the lens or lens group.

[0045] The aperture refers to the entity that limits the light beam in an optical lens. It can be the edge of the lens, the frame, or a specially set screen with holes. Its function can be divided into two aspects, limiting the light beam or limiting the size of the field of view (imaging range). The aperture that limits the light beam the most in an optical lens is called the aperture aperture, and the aperture that limits the field of view (size) the most is called the field aperture. As can be seen from the above, both the aperture aperture and the field aperture are real objects. The general rule for determining the aperture aperture of an optical lens is: looking at the aperture or the image of the aperture from the object point, the aperture aperture of the optical lens is determined by the one with the smallest opening angle. If the image of a certain aperture has the smallest opening angle, then the aperture itself is the aperture aperture.

[0046] The aperture is a device used to control the amount of light that passes through the lens and reaches the photosensitive element. The aperture size is expressed in F number / F value.

[0047] The aperture F value (F#) is a relative value obtained by dividing the focal length of the lens by the diameter of the lens (the inverse of the relative aperture). The smaller the aperture F value, the more light enters in the same unit time; the larger the aperture F value, the smaller the depth of field, and the background content of the photo will be blurred.

[0048] Positive optical power, also known as positive refractive power, means that the lens has a positive focal length and has the effect of converging light.

[0049] Negative optical power, also known as negative refractive power, means that the lens has a negative focal length and has the effect of diverging light.

[0050] The imaging surface 17, imaging refers to the real image cast on the light screen by the light after refraction, diffraction or straight-line propagation through the pinhole, and the imaging surface 17 refers to the plane where the imaging is located.

[0051] The optical axis is an imaginary line that defines how an optical lens conducts light. The optical axis is generally the light that passes vertically through the center of the lens.

[0052] The object side is divided by the optical lens and the side where the scene is located is the object side.

[0053] The image side is the side where the image of the scene is located, with the optical lens as the boundary.

[0054] Object side: the surface of the lens facing the object side is called the object side.

[0055] Image side: The surface of the lens facing the image side is called the image side.

[0056] Total optical length (TTL) refers to the total length from the end of the optical lens away from the imaging surface to the imaging surface (i.e., the total optical length is the distance from the axial incident light entering the lens to the photosensitive surface of the imaging chip). In this application, the total optical length refers to the distance from the object side of the first lens P1 to the photosensitive element on the optical axis of the optical lens.

[0057] The Abbe number, also known as the dispersion coefficient, is the difference ratio of the refractive index of an optical material at different wavelengths and represents the degree of dispersion of the material.

[0058] The refractive index of a lens is the ratio of the speed of light in a vacuum to the speed of light in the lens material, and reflects the lens's ability to refract light.

[0059] Aberration refers to the inconsistency between the results obtained by non-paraxial ray tracing and the results obtained by paraxial ray tracing in actual optical lenses, which is a deviation from the ideal condition of Gaussian optics (first-order approximation theory or paraxial rays).

[0060] The field of view represents the maximum range that the camera can observe.

[0061] In optical instruments, the angle of view is the angle formed by the two edges of the maximum range through which the image of the object being measured can pass through the lens, with the lens of the optical instrument as the vertex.

[0062] Vertical chromatic aberration, also called lateral chromatic aberration, refers to the difference in magnification of the lens component for different colors of light. The wavelength causes the magnification of the lens component to change, and the size of the image will also change accordingly.

[0063] The effective aperture, also called "aperture" or "maximum aperture", refers to the ratio of the beam diameter (also regarded as the lens diameter) of the front lens to the focal length when the aperture of each lens is fully opened.

[0064] The imaging circle, also called the imaging circle diameter, represents the diameter of the imaging area because the imaging area is circular.

[0065] Distortion, also known as distortion, is the degree of distortion of the image formed by the lens assembly on the object relative to the object itself. The height of the intersection of the main light of different fields of view with the Gaussian image plane after passing through the lens assembly is not equal to the ideal image height, and the difference between the two is the distortion.

[0066] Relative illumination refers to the ratio of the illumination at different coordinate points on the image plane to the illumination at the center point.

[0067] Spherical aberration, also known as spherical aberration. The light beam emitted by the object point on the axis, after passing through the optical system, intersects the optical axis at different positions with the light rays at different angles with the optical axis. Therefore, a circular diffuse spot is formed on the image plane. This is spherical aberration. It is generally measured by the axial distance between the intersection of the actual light ray on the image side and the optical axis and the intersection of the paraxial light ray and the optical axis (i.e., the Gaussian image point).

[0068] Coma aberration is the imaging error of a monochromatic conical light beam emitted by an off-axis object point outside the main axis to an optical system. If it fails to form a clear point on an ideal plane but forms a comet-shaped light spot with a bright tail after being refracted by the optical system, then the imaging error of this optical system is called coma aberration.

[0069] See also Figure 1The present application provides a large aperture high-pixel upright telephoto macro lens, comprising a first lens P1, a second lens P2, a third lens P3, a fourth lens P4, a fifth lens P5 and a sixth lens P6 arranged in sequence from the object side to the image side along the optical axis; the first lens P1 has a positive optical power and has a function of converging light, and the object side surface of the first lens P1 is a convex surface at the near optical axis, and the image side surface of the first lens P1 is a concave surface at the near optical axis, and a stop 102 is arranged on the side of the first lens P1; the second lens P2 has a negative optical power and has a function of dispersing light, and the object side surface of the second lens P2 is a concave surface at the near optical axis, and the image side surface of the second lens P2 is a concave surface at the near optical axis; the third lens P3 has a positive optical power and has a function of converging light, and the object side surface of the third lens P3 is a convex surface at the near optical axis, and the image side surface of the second lens P2 is a concave surface at the near optical axis. The fourth lens P4 has a negative optical power and has a function of dispersing light, and the object side surface of the fourth lens P4 is a concave surface at the near optical axis, and the image side surface of the fourth lens P4 is a concave surface at the near optical axis; the fifth lens P5 has a positive optical power and has a function of converging light, and the object side surface of the fifth lens P5 is a convex surface at the near optical axis, and the image side surface of the fifth lens P5 is a convex surface at the near optical axis; the sixth lens P6 has a negative optical power and has a function of dispersing light, and the object side surface of the sixth lens P6 is a concave surface at the near optical axis, and the image side surface of the sixth lens P6 is a convex surface at the near optical axis, wherein the image side surface of the sixth lens P6 is a convex surface, which can correct the field curvature, is conducive to realizing a large aperture setting of the lens, and achieves a high-definition effect.

[0070] In the present application, the optical power of the first lens P1 to the sixth lens P6 follows the positive-negative positive-negative positive-negative arrangement, so that by reasonably allocating the optical power, it is beneficial to improve the correction effect of spherical aberration and chromatic aberration, improve the imaging quality, and help the lens achieve a large aperture effect; moreover, in the present application, the sagitta P4S1 of the object side of the fourth lens P4 satisfies the condition: -0.6mm≤P4S1≤0mm. This range can control the sagitta of the fourth lens P4 while allowing the lens to have better resolution and tolerance value, which helps the lens achieve a close focus function, specifically 5cm macro focus; therefore, the upright telephoto lens provided in the present application can control the overall size of the lens within a suitable range and achieve a large aperture and near and far focus functions by optimizing the lens structure; specifically, the present application can provide a telephoto lens with a large aperture of F2.0, the height of which is less than 11mm, and can achieve clear focus imaging at any distance from 5cm to infinity.

[0071] Furthermore, the sagitta P2S2 of the image side of the second lens P2 satisfies the condition: 0.3mm≤P2S2≤0.9mm. This sagitta range can further converge light at the image side of the second lens P2 and increase the aperture difference of the object side of the second lens P2, which is beneficial to optimize the lens sagitta and sinusoidal field curvature. At the same time, the sagitta P6S1 of the object side of the sixth lens P6 satisfies the condition: -2mm≤P6S1≤-0.3mm. This sagitta range can control the incident angle of the main light and increase the relative illumination, ultimately avoiding the dark corner of the imaging surface 17 and improving the imaging quality.

[0072] Furthermore, the refractive index n1 of the first lens P1 satisfies the condition 1.45≤n1≤1.7, and the dispersion coefficient V1 of the first lens P1 satisfies the condition 45≤V1≤90; in the present application, the refractive index and dispersion coefficient (Abbe number) of the first lens P1 are controlled within this range to control the chromatic aberration range of the first lens P1, thereby reducing the burden of correcting chromatic aberration of other lenses, leaving degrees of freedom for correcting other aberrations, and facilitating the optimization design of each lens structure. Moreover, the first lens P1 is a lens with a low refractive index and a high Abbe number, so the first lens P1 can effectively improve the image quality of the image, which helps to improve the image quality.

[0073] Furthermore, the curvature radius P1R1 of the object side surface and the curvature radius P1R2 of the image side surface of the first lens P1 satisfy the following condition: 130mm≤|P1R2 / P1R1|≤175mm, thereby controlling the shapes of the object side surface and the image side surface of the first lens P1, thereby controlling the shape of the first lens P1, facilitating the processing of the first lens P1, and reserving a supporting plane for assembling the first lens P1.

[0074] In addition, the curvature radius P1R1 of the object side of the first lens P1 and the thickness H1 of the first lens P1 satisfy the following condition: 1.5≤P1R1 / H1≤2.5. This ratio is beneficial for controlling the shape of the first lens P1 and facilitating lens injection molding.

[0075] Furthermore, the focal length f1 of the first lens P1 and the focal length f2 of the second lens P2 satisfy the following conditional formula:

[0076] -4mm≤f1+f2≤-1.5mm, this focal length relationship is conducive to optimizing spherical aberration and chromatic aberration, and is conducive to achieving a large aperture and high pixel effect. At the same time, the focal length f1 of the first lens P1 and the focal length f6 of the sixth lens P6 meet the following condition: -4mm≤f1+f6≤0mm, and this focal length relationship can control the shape of the entire optical system to be normal. In addition, the focal length f5 of the fifth lens P5 meets the following conditions: 10mm≤f5≤100mm; setting the focal length of the fifth lens P5 in this range helps to correct the astigmatism of the lens and improve the imaging quality of the lens.

[0077] Furthermore, the total optical length TTL of the large aperture high pixel upright telephoto macro lens and the focal length f′ of the large aperture high pixel upright telephoto macro lens satisfy the following condition: TTL / f′<1.1, thereby controlling the overall volume of the lens and keeping it within an appropriate range to prevent the overall size of the lens from being too large.

[0078] In addition, the thickness H1 of the first lens P1 and the total optical length TTL of the lens satisfy the following condition: 0.1≤H1 / TTL≤2, so that when the first lens P1 is compared with the entire optical system, the thickness of the first lens P1 is within a reasonable range to avoid the thickness of individual lenses being abnormally thick or thin and affecting the overall structure.

[0079] Furthermore, the thickness H1 of the first lens P1 and the thickness H2 of the second lens P2 satisfy the following condition: 5≤H1 / H2≤9. By controlling the thickness ratio of the first lens P1 and the second lens P2, it is beneficial to optimize the spherical aberration, thereby ensuring the imaging quality.

[0080] Furthermore, the distance MICROH34 between the third lens P3 and the fourth lens P4 at near focus and the distance INFH34 between the third lens P3 and the fourth lens P4 at far focus satisfy the following conditional formula: 0.3≤

[0081] MICROH34-INFH34; In the present application, by controlling the distance difference between the telephoto and telephoto within this range, the lens travel distance at different focusing times can be met and collision can be avoided.

[0082] In one embodiment, the effective aperture P1D1 of the object side of the first lens P1 and the effective aperture P4D1 of the fourth lens P4 satisfy the following conditional formula: 0.5≤P1D1-P4D1≤1.5, thereby reducing the incident angle of light on the fourth lens P4 and reducing the generation of spherical aberration. At the same time, the effective aperture P6D2 of the image side of the sixth lens P6 and the effective aperture P3D1 of the object side of the third lens P3 satisfy the following conditional formula: 1≤P6D2-P3D1≤1.5, thereby increasing the image height and meeting the imaging size requirement.

[0083] In addition, the effective aperture P6D2 of the image side of the sixth lens P6 and the effective aperture P1D1 of the object side of the first lens P1 satisfy the following condition: 0.5≤P6D2 / P1D1≤1.5. This range can make the overall lens symmetrical, facilitate the design of the lens barrel, and facilitate the assembly of the lenses in the lens barrel.

[0084] Furthermore, a filter 101 may be provided between the sixth lens P6 and the imaging surface 17 , and the filter 101 is used to filter stray light.

[0085] The structure and performance of the large aperture, high pixel, upright telephoto macro lens provided by the present application are described below in conjunction with specific embodiments.

[0086] [Example 1]

[0087] like Figure 1 The figure shows a schematic structural diagram of a large aperture high-pixel upright telephoto macro lens provided in the first embodiment of the present invention, wherein the large aperture high-pixel upright telephoto macro lens comprises a first lens P1, a second lens P2, a third lens P3, a fourth lens P4, a fifth lens P5 and a sixth lens P6 which are sequentially arranged along the optical axis from the object side to the image side; the first lens P1 has a positive optical power and has a function of converging light, and the object side surface of the first lens P1 is a convex surface at the near optical axis, and the image side surface of the first lens P1 is a concave surface at the near optical axis, and a stop 102 is arranged on the side of the first lens P1; the second lens P2 has a negative optical power and has a function of dispersing light, and the object side surface of the second lens P2 is a concave surface at the near optical axis, and the image side surface of the second lens P2 is a concave surface at the near optical axis. is a concave surface; the third lens P3 has positive focal power, and has the function of converging light, and the object side surface of the third lens P3 is a convex surface at the near optical axis, and the image side surface of the third lens P3 is a convex surface at the near optical axis; the fourth lens P4 has negative focal power, and has the function of dispersing light, and the object side surface of the fourth lens P4 is a concave surface at the near optical axis, and the image side surface of the fourth lens P4 is a concave surface at the near optical axis; the fifth lens P5 has positive focal power, and has the function of converging light, and the object side surface of the fifth lens P5 is a convex surface at the near optical axis, and the image side surface of the fifth lens P5 is a convex surface at the near optical axis; the sixth lens P6 has negative focal power, and has the function of dispersing light, and the object side surface of the sixth lens P6 is a concave surface at the near optical axis, and the image side surface of the sixth lens P6 is a convex surface at the near optical axis.

[0088] Tables 1 and 2 below show the optical parameter settings of each lens in a large aperture, high pixel, upright telephoto macro lens provided in Example 1.

[0089]

[0090] Table 1

[0091]

[0092] Table 2

[0093] Among them, R1 shown in the above two tables represents the object side of the corresponding lens, and R2 represents the image side of the corresponding lens. At the same time, the curvature radius, thickness, focal length and radius aperture (half aperture * 2 is the effective aperture) shown in the table are all in mm.

[0094] Referring to the above two tables, in this embodiment, the sagittal height P2S2 of the image side of the second lens P2 is 0.6 mm, the sagittal height P4S1 of the object side of the fourth lens P4 is -0.29 mm, and the sagittal height P6S1 of the object side of the sixth lens P6 is -1.18 mm;

[0095] The refractive index n1 of the first lens P1 is 1.51, and the dispersion coefficient V1 of the first lens P1 is 57.5 mm;

[0096] The curvature radius P1R1 of the object side of the first lens P1 is 3.3 mm, the curvature radius P1R2 of the image side of the first lens P1 is -500 mm, |P1R2 / P1R1|=151.51;

[0097] The thickness H1 of the first lens P1 is 1.7 mm, P1R1 / H1=1.94;

[0098] The focal length f1 of the first lens P1 is 6.35 mm, the focal length f2 of the second lens P2 is -9.3 mm, f1+f2=-2.95 mm;

[0099] The focal length f5 of the fifth lens element P5 is 14.1 mm;

[0100] The focal length f6 of the sixth lens P6 is -8.2 mm, f1+f6=-1.85 mm;

[0101] The effective aperture P1D1 of the object side of the first lens P1 is 2.75*2=5.5 mm, the effective aperture P4D1 of the fourth lens P4 is 2.28*2=4.56 mm, P1D1-P4D1=0.94;

[0102] The effective aperture P6D2 of the image side of the sixth lens P6 is 2.96*2=5.92 mm, the effective aperture P3D1 of the object side of the third lens P3 is 2.27*2=4.54 mm, P6D2-P3D1=1.38 mm;

[0103] The effective aperture P1D1 of the object side of the first lens P1 is 2.75*2=5.5 mm, and the effective aperture P6D2 of the image side of the sixth lens P6 is 2.96*2=5.92 mm, P6D2 / P1D1=1.078 mm;

[0104] The thickness H1 of the first lens P1 is 1.7 mm, the thickness H2 of the second lens P2 is 0.2 mm, and H1 / H2=8.5;

[0105] The distance MICROH34 between the third lens P3 and the fourth lens P4 at near focus is 1.133 mm, and the distance INFH34 between the third lens P3 and the fourth lens P4 at far focus is 0.396 mm.

[0106] MICROH34-INFH34=0.737mm;

[0107] The specific conditional formula and calculation results can be found in the following table:

[0108] Conditional expression Example 1 P6S1 -1.18 n1 1.51 V1 57.5 |P1R2 / P1R1| 151.51 P2S2 0.60 f1+f2 -2.95 f1+f6 -1.85 TTL / f′ 0.993 H1 / H2 8.50 H1 / TTL 0.15178 P1R1 / H1 1.94 P6D2 / P1D1 1.078 MICROH34-INFH34 0.737 P4S1 -0.29 f5 14.10 P1D1-P4D1 0.94 P6D2-P3D1 1.38

[0109] Table 3

[0110] Therefore, in this application, the optical parameters of the large aperture high pixel upright telephoto macro lens composed of the above lenses can be seen in the following Table 4:

[0111]

[0112]

[0113] Table 4

[0114] It can be seen from Table 4 above that the lens provided in Example 1 has the characteristics of a large aperture of F1.98, a large field of view, and a large imaging area, and the total optical length TTL of the lens is 10.9 mm, the focal length f′ is 10.98 mm, and TTL / f′=0.993<1.1, so the overall volume of the lens can be controlled within an appropriate range to prevent the overall size of the lens from being too large; moreover, the thickness H1 of the first lens P1 is 1.7 mm, and the total optical length TTL is 10.9 mm, which satisfies 0.1≤H1 / TTL=0.15≤2, so that when the first lens P1 is compared with the entire optical system, the thickness of the first lens P1 is within a reasonable range to avoid the thickness of individual lenses being abnormally thick or thin and affecting the overall structure.

[0115] The optical performance of the large aperture, high pixel, upright telephoto macro lens provided by this embodiment is described in detail below.

[0116] The following is a description of each performance parameter.

[0117] Figure 2 This is a graph of the MTF (Modulation Transfer Function) of the lens provided in Example 1 when the object distance is infinite, wherein the abscissa is the spatial resolution in line pairs / mm, and the ordinate is the contrast. Figure 2 It can be seen that at a spatial frequency of 125lp / mm, the MTF value of the lens in the full field of view is greater than 0.3, close to the diffraction limit. Therefore, the lens has excellent resolving power and good imaging quality.

[0118] Figure 3 The MTF (Modulation Transfer Function) curve of the lens provided in Example 1 when the object distance is 15 cm, wherein the abscissa is the spatial resolution in line pairs / mm, and the ordinate is the contrast. Figure 3 It can be seen that at a spatial frequency of 125lp / mm, the MTF value of the lens in the entire field of view is greater than 0.2, close to the diffraction limit, with excellent resolving power and good imaging quality.

[0119] Figure 4This is a relative illumination curve diagram of the lens provided in Example 1, wherein the horizontal coordinate represents the field of view in millimeters, and the vertical coordinate represents the relative illumination value; Figure 4 It can be seen that the relative illumination of the lens within the entire field of view is greater than 80%. Therefore, the lens provided in this embodiment has a high relative illumination, and the high relative illumination can ensure the uniformity of the overall brightness distribution of the picture. Even in the corners of the picture, the difference between the brightness and the brightness of the center is still very small. Therefore, the lens in this embodiment can adapt to various complex scenes such as cluttered ambient light, low illumination, and large changes in object distance, and the applicability of the lens can be improved thereby.

[0120] Figure 5 The field curvature diagram and distortion curve diagram of the lens provided in Example 1; wherein the left coordinate system is the field curvature diagram, the horizontal coordinate in the diagram represents the magnitude of the field curvature, in millimeters, and the vertical coordinate represents the normalized image height. It can be seen from the field curvature diagram that the lens provided in this embodiment is effectively controlled in terms of field curvature, that is, when imaging, the difference between the image quality at the center and the image quality at the periphery is small; the right coordinate system is the distortion curve diagram of the lens, the horizontal coordinate in the diagram represents the distortion rate, that is, the magnitude of the distortion, in %, and the vertical coordinate represents the normalized image height; it can be seen from the distortion curve diagram that the distortion rate of the lens provided in this embodiment is controlled within the range of ±2%, that is, the distortion amount of the imaging is small, the imaging shape is slightly different from the ideal shape, and the imaging quality is high.

[0121] Figure 6 This is an axial aberration diagram of the lens proposed in Example 1, in which the abscissa is the spherical aberration value at different wavelengths, and the ordinate is the normalized entrance pupil diameter, in mm. Figure 6 The spherical aberration value of the light with wavelengths of 650nm, 610nm, 555nm, 510mm, and 470mm after passing through the lens is given by Figure 6 It can be seen that the axial aberration of this embodiment is less than 0.09 mm, and has a good color correction effect.

[0122] Figure 7 This is a vertical axis chromatic aberration curve of the lens provided in Example 1, where the horizontal axis is the chromatic aberration value and the vertical axis is the field of view, in units of mm. Figure 7 The example shows the vertical axis chromatic aberration of light with wavelengths of 650nm, 610nm, 555nm, 510mm, and 470mm after passing through the lens. Figure 7 It can be seen that the vertical axis chromatic aberration at different wavelengths is controlled within ±3μm, and the chromatic aberration restoration is good.

[0123] Therefore, in this embodiment, a telephoto lens with a large aperture of F1.98 can be provided, the height of which is less than 11 mm, and clear focus imaging can be achieved at any distance from 5 cm to infinity. Moreover, in this embodiment, the vertical axis chromatic aberration, axial aberration, field curvature and distortion of the light after passing through the lens of this embodiment are all small, and the relative illumination is high, so the lens of this embodiment has a good imaging effect, and the lens has good imaging quality in the range of object distance from 5 cm to infinity.

[0124] [Example 2]

[0125] like Figure 8 The figure shows a schematic diagram of the structure of a large aperture high-pixel upright telephoto macro lens provided in the second embodiment of the present invention, the large aperture high-pixel upright telephoto macro lens comprises a first lens P1, a second lens P2, a third lens P3, a fourth lens P4, a fifth lens P5 and a sixth lens P6 which are arranged in sequence from the object side to the image side along the optical axis; the first lens P1 has a positive optical power and has a function of converging light, and the object side surface of the first lens P1 is a convex surface at the near optical axis, and the image side surface of the first lens P1 is a concave surface at the near optical axis, and a stop 102 is arranged on the side of the first lens P1; the second lens P2 has a negative optical power and has a function of dispersing light, and the object side surface of the second lens P2 is a concave surface at the near optical axis, and the image side surface of the second lens P2 is a concave surface at the near optical axis. The object side of the third lens P3 is convex at the near optical axis, and the image side of the third lens P3 is convex at the near optical axis; the fourth lens P4 has a negative focal power and has a function of dispersing light, and the object side of the fourth lens P4 is concave at the near optical axis, and the image side of the fourth lens P4 is concave at the near optical axis; the fifth lens P5 has a positive focal power and has a function of converging light, and the object side of the fifth lens P5 is convex at the near optical axis, and the image side of the fifth lens P5 is convex at the near optical axis; the sixth lens P6 has a negative focal power and has a function of dispersing light, and the object side of the sixth lens P6 is concave at the near optical axis, and the image side of the sixth lens P6 is convex at the near optical axis.

[0126] Tables 1 and 2 below show the optical parameter settings of each lens in a large aperture, high pixel, upright telephoto macro lens provided in Example 2.

[0127]

[0128] Table 1

[0129]

[0130] Table 2

[0131] Among them, R1 shown in the above two tables represents the object side of the corresponding lens, and R2 represents the image side of the corresponding lens. At the same time, the curvature radius, thickness, focal length and radius aperture (half aperture * 2 is the effective aperture) shown in the table are all in mm.

[0132] Referring to the above two tables, in this embodiment, the sagitta P2S2 of the image side of the second lens P2 is 0.73 mm, the sagitta P4S1 of the object side of the fourth lens P4 is -0.38 mm, and the sagitta P6S1 of the object side of the sixth lens P6 is -1.08 mm;

[0133] The refractive index n1 of the first lens P1 is 1.51, and the dispersion coefficient V1 of the first lens P1 is 57.5 mm;

[0134] The curvature radius P1R1 of the object side of the first lens P1 is 3.2 mm, the curvature radius P1R2 of the image side of the first lens P1 is -500 mm, |P1R2 / P1R1|=156.25;

[0135] The thickness H1 of the first lens P1 is 1.7 mm, P1R1 / H1=1.88;

[0136] The focal length f1 of the first lens P1 is 6.2 mm, the focal length f2 of the second lens P2 is -10.9 mm, f1+f2=-4.7 mm;

[0137] The focal length f5 of the fifth lens element P5 is 39.7mm;

[0138] The focal length f6 of the sixth lens P6 is -8.6 mm, f1+f6=-2.4 mm;

[0139] The effective aperture P1D1 of the object side of the first lens P1 is 2.75*2=5.5 mm, the effective aperture P4D1 of the fourth lens P4 is 2.27*2=4.54 mm, P1D1-P4D1=0.96;

[0140] The effective aperture P6D2 of the image side of the sixth lens P6 is 2.84*2=5.68 mm, the effective aperture P3D1 of the object side of the third lens P3 is 2.25*2=4.5 mm, P6D2-P3D1=1.18 mm;

[0141] The effective aperture P1D1 of the object side of the first lens P1 is 2.75*2=5.5 mm, and the effective aperture P6D2 of the image side of the sixth lens P6 is 2.84*2=5.68 mm, P6D2 / P1D1=1.01 mm;

[0142] The thickness H1 of the first lens P1 is 1.7 mm, the thickness H2 of the second lens P2 is 0.2 mm, and H1 / H2=8.5;

[0143] The distance MICROH34 between the third lens P3 and the fourth lens P4 at near focus is 1.181 mm, and the distance INFH34 between the third lens P3 and the fourth lens P4 at far focus is 0.416 mm.

[0144] MICROH34-INFH34=0.765mm;

[0145] The specific conditional formula and calculation results can be found in the following table:

[0146]

[0147]

[0148] Table 3

[0149] Therefore, in this application, the optical parameters of the large aperture high pixel upright telephoto macro lens composed of the above lenses can be seen in the following Table 4:

[0150] focal length 11mm Band 410~650nm aperture 1.99 Imaging circle 6.87mm Field of view 33° Total optical length 10.76mm

[0151] Table 4

[0152] As shown in Table 4 above, the lens provided in Example 2 has the characteristics of a large aperture of F1.99, a large field of view, and a large imaging area, and the total optical length TTL of the lens is 10.76 mm, the focal length f′ is 11 mm, and TTL / f′ is

[0153] =0.978<1.1, so the overall volume of the lens can be controlled within an appropriate range to prevent the overall size of the lens from being too large; moreover, the thickness H1 of the first lens P1 is 1.7 mm, and the total optical length TTL is 10.76 mm, which satisfies 0.1≤H1 / TTL=0.160≤2. Therefore, when the first lens P1 is compared with the entire optical system, the thickness of the first lens P1 is within a reasonable range to avoid the thickness of individual lenses being abnormally thick or thin and affecting the overall structure.

[0154] The optical performance of the large aperture, high pixel, upright telephoto macro lens provided by this embodiment is described in detail below.

[0155] The following is a description of each performance parameter.

[0156] Fig. 9 The MTF (Modulation Transfer Function) curve of the lens provided in Example 2 when the object distance is infinite, wherein the abscissa is the spatial resolution in line pairs / mm, and the ordinate is the contrast. Fig. 9 It can be seen that at a spatial frequency of 125lp / mm, the MTF value of the lens in the entire field of view is greater than 0.2, which is close to the diffraction range. Therefore, the lens has excellent resolving power and good imaging quality.

[0157] Fig.10 This is a graph of the MTF (modulation transfer function) of the lens provided in Example 2 when the object distance is 5 cm, wherein the abscissa is the spatial resolution in line pairs / mm, and the ordinate is the contrast. Fig.10 It can be seen that at a spatial frequency of 125lp / mm, the MTF value of the lens in the entire field of view is greater than 0.3, close to the diffraction range, with excellent resolution and good imaging quality.

[0158] Fig.11 This is a relative illumination curve diagram of the lens provided in Example 2, wherein the horizontal coordinate represents the field of view in millimeters, and the vertical coordinate represents the relative illumination value; Fig.11 It can be seen that the relative illumination of the lens within the entire field of view is greater than 80%. Therefore, the lens provided in this embodiment has a high relative illumination, and the high relative illumination can ensure the uniformity of the overall brightness distribution of the picture. Even in the corners of the picture, the difference between the brightness and the brightness of the center is still very small. Therefore, the lens in this embodiment can adapt to various complex scenes such as cluttered ambient light, low illumination, and large changes in object distance, and the applicability of the lens can be improved thereby.

[0159] Fig.12 The field curvature diagram and distortion curve diagram of the lens provided in Example 2; wherein the left coordinate system is the field curvature diagram, the horizontal coordinate in the diagram represents the magnitude of the field curvature, in millimeters, and the vertical coordinate represents the normalized image height. It can be seen from the field curvature diagram that the field curvature of the lens provided in this embodiment is effectively controlled, that is, when imaging, the difference between the image quality at the center and the image quality at the periphery is small; the right coordinate system is the distortion curve diagram of the lens, the horizontal coordinate in the diagram represents the distortion rate, that is, the magnitude of the distortion, in %, and the vertical coordinate represents the normalized image height; it can be seen from the distortion curve diagram that the distortion rate of the lens provided in this embodiment is controlled within the range of ±1%, that is, the distortion amount of the imaging is small, the imaging shape is slightly different from the ideal shape, and the imaging quality is high.

[0160] Fig.13 This is an axial aberration diagram of the lens proposed in Example 2, in which the abscissa is the spherical aberration value at different wavelengths, and the ordinate is the normalized entrance pupil diameter, in mm. Fig.13 The spherical aberration value of the light with wavelengths of 650nm, 610nm, 555nm, 510mm, and 470mm after passing through the lens is given by Fig.13 It can be seen that the axial aberration of this embodiment is less than 0.06 mm, and has a good color correction effect.

[0161] Fig.14 This is a vertical axis chromatic aberration curve of the lens provided in Example 2, where the horizontal axis is the chromatic aberration value and the vertical axis is the field of view, in units of mm. Fig.14The example shows the vertical axis chromatic aberration of light with wavelengths of 650nm, 610nm, 555nm, 510mm, and 470mm after passing through the lens. Fig.14 It can be seen that the vertical axis chromatic aberration at different wavelengths is controlled within ±3μm, and the chromatic aberration restoration is good.

[0162] Therefore, in this embodiment, a telephoto lens with a large aperture of F1.99 can be provided, the height of which is less than 11 mm, and clear focus imaging can be achieved at any distance from 5 cm to infinity. Moreover, in this embodiment, the vertical axis chromatic aberration, axial aberration, field curvature and distortion of the light after passing through the lens of this embodiment are all small, and the relative illumination is high, so the lens of this embodiment has a good imaging effect, and the lens has good imaging quality in the range of object distance from 5 cm to infinity.

[0163] [Example 3]

[0164] like Fig.15 The figure shows a schematic diagram of the structure of a large aperture high-pixel upright telephoto macro lens provided in the third embodiment of the present invention, wherein the large aperture high-pixel upright telephoto macro lens comprises a first lens P1, a second lens P2, a third lens P3, a fourth lens P4, a fifth lens P5 and a sixth lens P6 which are arranged in sequence from the object side to the image side along the optical axis; the first lens P1 has a positive optical power and has a function of converging light, and the object side surface of the first lens P1 is a convex surface at the near optical axis, and the image side surface of the first lens P1 is a concave surface at the near optical axis, and a stop 102 is arranged on the side of the first lens P1; the second lens P2 has a negative optical power and has a function of dispersing light, and the object side surface of the second lens P2 is a concave surface at the near optical axis, and the image side surface of the second lens P2 is a concave surface at the near optical axis. The object side of the third lens P3 is convex at the near optical axis, and the image side of the third lens P3 is convex at the near optical axis; the fourth lens P4 has a negative focal power and has a function of dispersing light, and the object side of the fourth lens P4 is concave at the near optical axis, and the image side of the fourth lens P4 is concave at the near optical axis; the fifth lens P5 has a positive focal power and has a function of converging light, and the object side of the fifth lens P5 is convex at the near optical axis, and the image side of the fifth lens P5 is convex at the near optical axis; the sixth lens P6 has a negative focal power and has a function of dispersing light, and the object side of the sixth lens P6 is concave at the near optical axis, and the image side of the sixth lens P6 is convex at the near optical axis.

[0165] Tables 1 and 2 below show the optical parameter settings of each lens in a large aperture, high pixel, upright telephoto macro lens provided in Example 3.

[0166]

[0167] Table 1

[0168]

[0169] Table 2

[0170] Among them, R1 shown in the above two tables represents the object side of the corresponding lens, and R2 represents the image side of the corresponding lens. At the same time, the curvature radius, thickness, focal length and radius aperture (half aperture * 2 is the effective aperture) shown in the table are all in mm.

[0171] Referring to the above two tables, in this embodiment, the sagittal height P2S2 of the image side of the second lens P2 is 0.58 mm, the sagittal height P4S1 of the object side of the fourth lens P4 is -0.30 mm, and the sagittal height P6S1 of the object side of the sixth lens P6 is -1.04 mm;

[0172] The refractive index n1 of the first lens P1 is 1.51, and the dispersion coefficient V1 of the first lens P1 is 57.3 mm;

[0173] The curvature radius P1R1 of the object side of the first lens P1 is 3.4 mm, the curvature radius P1R2 of the image side of the first lens P1 is -500 mm, |P1R2 / P1R1|=147.06;

[0174] The thickness H1 of the first lens P1 is 1.6 mm, P1R1 / H1=2.125;

[0175] The focal length f1 of the first lens P1 is 6.5 mm, the focal length f2 of the second lens P2 is -9.3 mm, f1+f2=-2.8 mm;

[0176] The focal length f5 of the fifth lens element P5 is 14.2mm;

[0177] The focal length f6 of the sixth lens P6 is -7.4 mm, f1+f6=-0.9 mm;

[0178] The effective aperture P1D1 of the object side of the first lens P1 is 2.75*2=5.5 mm, the effective aperture P4D1 of the fourth lens P4 is 2.33*2=4.66 mm, P1D1-P4D1=0.84;

[0179] The effective aperture P6D2 of the image side of the sixth lens P6 is 2.96*2=5.92 mm, the effective aperture P3D1 of the object side of the third lens P3 is 2.33*2=4.66 mm, P6D2-P3D1=1.26 mm;

[0180] The effective aperture P1D1 of the object side of the first lens P1 is 2.75*2=5.5 mm, and the effective aperture P6D2 of the image side of the sixth lens P6 is 2.96*2=5.92 mm, P6D2 / P1D1=1.076 mm;

[0181] The thickness H1 of the first lens P1 is 1.6 mm, the thickness H2 of the second lens P2 is 0.2 mm, and H1 / H2=8.0;

[0182] The distance MICROH34 between the third lens P3 and the fourth lens P4 at near focus is 1.156 mm, and the distance INFH34 between the third lens P3 and the fourth lens P4 at far focus is 0.416 mm.

[0183] MICROH34-INFH34=0.74mm;

[0184] The specific conditional formula and calculation results can be found in the following table:

[0185] Conditional expression Example 3 P6S1 -1.04 n1 1.51 V1 57.3 |P1R2 / P1R1| 147.06 P2S2 0.58 f1+f2 -2.8 f1+f6 -0.9 TTL / f′ 1.009 H1 / H2 8.0 H1 / TTL 0.144627 P1R1 / H1 2.125 P6D2 / P1D1 1.076 MICROH34-INFH34 0.74 P4S1 -0.30 f5 14.20 P1D1-P4D1 0.84 P6D2-P3D1 1.26

[0186] Table 3

[0187] Therefore, in this application, the optical parameters of the large aperture high pixel upright telephoto macro lens composed of the above lenses can be seen in the following Table 4:

[0188] focal length 11mm Band 410~650nm aperture 1.99 Imaging circle 6.71mm Field of view 33° Total optical length 11.1mm

[0189] Table 4

[0190] As can be seen from Table 4 above, the lens provided in Example 3 has the characteristics of a large aperture of F1.99, a large field of view, and a large imaging area, and the total optical length TTL of the lens is 11.1 mm, the focal length f′ is 11 mm, and TTL / f′ is

[0191] =1.009<1.1, so the overall volume of the lens can be controlled within an appropriate range to prevent the overall size of the lens from being too large; moreover, the thickness H1 of the first lens P1 is 1.6 mm, and the total optical length TTL is 11.1 mm, satisfying 0.1≤H1 / TTL=0.144≤2. Therefore, when the first lens P1 is compared with the entire optical system, the thickness of the first lens P1 is within a reasonable range to avoid the thickness of individual lenses being abnormally thick or thin and affecting the overall structure.

[0192] The optical performance of the large aperture, high pixel, upright telephoto macro lens provided by this embodiment is described in detail below.

[0193] The following is a description of each performance parameter.

[0194] Fig.16This is a graph of the MTF (modulation transfer function) of the lens provided in Example 3 when the object distance is infinite, wherein the abscissa is the spatial resolution in line pairs / mm, and the ordinate is the contrast. Fig.16 It can be seen that at a spatial frequency of 125lp / mm, the MTF value of the lens in the entire field of view is greater than 0.3, so the lens has excellent resolving power and good imaging quality.

[0195] Fig.17 This is a graph of the MTF (modulation transfer function) of the lens provided in Example 3 when the object distance is 5 cm, wherein the abscissa is the spatial resolution in line pairs / mm, and the ordinate is the contrast. Fig.17 It can be seen that at a spatial frequency of 125lp / mm, the MTF value of the lens in the entire field of view is greater than 0.4, which has excellent resolving power and good imaging quality.

[0196] Fig.18 The relative illumination curve diagram of the lens provided in Example 3, wherein the horizontal coordinate represents the field of view in millimeters, and the vertical coordinate represents the relative illumination value; Fig.18 It can be seen that the relative illumination of the lens within the entire field of view is greater than 90%. Therefore, the lens provided in this embodiment has a high relative illumination, and the high relative illumination can ensure the uniformity of the overall brightness distribution of the picture. Even in the corners of the picture, the difference between the brightness and the brightness of the center is still very small. Therefore, the lens in this embodiment can adapt to various complex scenes such as cluttered ambient light, low illumination, and large changes in object distance, and the applicability of the lens can be improved thereby.

[0197] Fig.19 The field curvature diagram and distortion curve diagram of the lens provided in Example 3; wherein the left coordinate system is the field curvature diagram, the horizontal coordinate in the diagram represents the magnitude of the field curvature, in millimeters, and the vertical coordinate represents the normalized image height. It can be seen from the field curvature diagram that the lens provided in this embodiment is effectively controlled in terms of field curvature, that is, when imaging, the difference between the image quality at the center and the image quality at the periphery is small; the right coordinate system is the distortion curve diagram of the lens, the horizontal coordinate in the diagram represents the distortion rate, that is, the magnitude of the distortion, in %, and the vertical coordinate represents the normalized image height; it can be seen from the distortion curve diagram that the distortion rate of the lens provided in this embodiment is controlled within the range of ±2%, that is, the distortion amount of the imaging is small, the imaging shape is slightly different from the ideal shape, and the imaging quality is high.

[0198] Fig. 20 This is an axial aberration diagram of the lens proposed in Example 3, in which the abscissa is the spherical aberration value at different wavelengths, and the ordinate is the normalized entrance pupil diameter, in mm. Fig. 20 The spherical aberration value of the light with wavelengths of 650nm, 610nm, 555nm, 510mm, and 470mm after passing through the lens is given by Fig. 20It can be seen that the axial aberration of this embodiment is less than 0.04 mm, and has a good color correction effect.

[0199] Fig.21 This is a vertical axis chromatic aberration curve of the lens provided in Example 3, where the horizontal axis is the chromatic aberration value and the vertical axis is the field of view, in units of mm. Fig.21 The example shows the vertical axis chromatic aberration of light with wavelengths of 650nm, 610nm, 555nm, 510mm, and 470mm after passing through the lens. Fig.21 It can be seen that the vertical axis chromatic aberration at different wavelengths is controlled within ±3μm, and the chromatic aberration restoration is good.

[0200] Therefore, in this embodiment, a telephoto lens with a large aperture of F1.99 can be provided, the height of which is less than 11 mm, and clear focus imaging can be achieved at any distance from 5 cm to infinity. Moreover, in this embodiment, the vertical axis chromatic aberration, axial aberration, field curvature and distortion of the light after passing through the lens of this embodiment are all small, and the relative illumination is high, so the lens of this embodiment has a good imaging effect, and the lens has good imaging quality in the range of object distance from 5 cm to infinity.

[0201] In summary, the lens parameters provided in Embodiments 1 to 3 are as follows:

[0202] Example 1 Example 2 Example 3 focal length 10.98mm 11mm 11mm Band 410~650nm 410~650nm 410~650nm aperture 1.98 1.99 1.99 Imaging circle 6.7mm 6.87mm 6.71mm Field of view 33° 33° 33° Total optical length 10.9mm 10.76mm 11.1mm

[0203] Therefore, the present application can provide a telephoto lens with a large aperture of F2.0. The lens has a large field of view, a large imaging area, and can achieve clear focus imaging at any distance from 5 cm to infinity. Moreover, the height is less than 11.5 mm, so that the overall size of the lens can be controlled within an appropriate range, thereby achieving a lightweight design of the lens and the mobile phone.

[0204] The large aperture, high pixel, upright telephoto macro lens provided in the present application can be applied to any electronic device, wherein the electronic device can be a tablet, a computer, a mobile phone, a camcorder, a camera, or other electronic devices with photo or video recording functions.

[0205] As long as it does not violate the creative idea of ​​the utility model, any combination of various different embodiments of the utility model should be regarded as the content disclosed by the utility model; within the technical concept of the utility model, any simple modification of the technical solution and any combination of different embodiments that do not violate the creative idea of ​​the utility model should be within the protection scope of the utility model.

Claims

1. A large aperture, high pixel, vertical telephoto macro lens, characterized in that: The invention comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens which are arranged in sequence from the object side to the image side along the optical axis; the first lens has a positive optical power, and the object side surface of the first lens is a convex surface at the near optical axis, and the image side surface of the first lens is a concave surface at the near optical axis; the second lens has a negative optical power, and the object side surface of the second lens is a concave surface at the near optical axis, and the image side surface of the second lens is a concave surface at the near optical axis; the third lens has a positive optical power, and the object side surface of the third lens is a convex surface at the near optical axis The first lens has a convex surface, and the image side surface of the third lens is a convex surface at the near optical axis; the fourth lens has a negative optical power, and the object side surface of the fourth lens is a concave surface at the near optical axis, and the image side surface of the fourth lens is a concave surface at the near optical axis; the fifth lens has a positive optical power, and the object side surface of the fifth lens is a convex surface at the near optical axis, and the image side surface of the fifth lens is a convex surface at the near optical axis; the sixth lens has a negative optical power, and the object side surface of the sixth lens is a concave surface at the near optical axis, and the image side surface of the sixth lens is a convex surface at the near optical axis; The sagittal height P4S1 of the object side of the fourth lens satisfies the condition: -0.6mm≤P4S1≤0mm.

2. The large aperture high pixel vertical telephoto macro lens according to claim 1, characterized in that: The sagittal height P2S2 of the image side of the second lens satisfies the condition: 0.3mm≤P2S2≤0.9mm.

3. The large aperture high pixel vertical telephoto macro lens according to claim 1, characterized in that: The sagittal height P6S1 of the object side of the sixth lens satisfies the condition: -2mm≤P6S1≤-0.3mm.

4. The large aperture high pixel vertical telephoto macro lens according to claim 1, characterized in that: The refractive index n1 of the first lens satisfies the condition 1.45≤n1≤1.7; the dispersion coefficient V1 of the first lens satisfies the condition 45≤V1≤90.

5. The large aperture high pixel vertical telephoto macro lens according to claim 1, characterized in that: The curvature radius P1R1 of the object side surface and the curvature radius P1R2 of the image side surface of the first lens satisfy the following condition: 130 mm ≤ |P1R2 / P1R1| ≤ 175 mm.

6. The large aperture high pixel vertical telephoto macro lens according to claim 1, characterized in that: The focal length f1 of the first lens and the focal length f2 of the second lens satisfy the following condition: -4mm≤f1+f2≤-1.5mm.

7. The large aperture high pixel vertical telephoto macro lens according to claim 1, characterized in that: The total optical length TTL of the large aperture high pixel upright telephoto macro lens and the focal length f′ of the large aperture high pixel upright telephoto macro lens satisfy the following conditional expression: TTL / f′<1.

1.

8. The large aperture high pixel vertical telephoto macro lens according to claim 1, characterized in that: The thickness H1 of the first lens and the thickness H2 of the second lens satisfy the following condition: 5≤H1 / H2≤9.

9. The large aperture high pixel vertical telephoto macro lens according to claim 1, characterized in that: The distance MICROH34 between the third lens and the fourth lens at near focus and the distance INFH34 between the third lens and the fourth lens at far focus satisfy the following condition: 0.3 mm ≤ MICROH34-INFH34.

10. The large aperture high pixel vertical telephoto macro lens according to claim 1, characterized in that: The effective diameter P1D1 of the first lens object side surface and the effective diameter P4D1 of the fourth lens object side surface satisfy the following condition: 0.5 mm ≤ P1D1 - P4D1 ≤ 1.5 mm.

Images