An optical imaging system

Abstract

The application relates to an optical imaging system, which comprises a first lens barrel and a second lens barrel in sequence from an object side to an image side along an optical axis direction, wherein the first lens barrel contains a first lens and a second lens, the second lens barrel contains a third lens, a fourth lens, a fifth lens and a sixth lens, a first spacing element is arranged between the first lens and the second lens, a spacing element is arranged between each two adjacent lenses in the second lens barrel, and an automatic focusing assembly is further arranged between the second lens and the third lens. The optical imaging system further satisfies the conditions of 2.15<(Dbs-dbs) / (Dam-dam)<2.95 and 0.07<(D1s-d1s) / f12<0.58. In this way, the stray light between the first lens and the second lens can be reduced under the condition of small design freedom, so that the imaging quality of the lens is ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of optical devices, in particular to an optical imaging system. BACKGROUND

[0002] In the field of optical imaging, the focusing technology of the lens has always been a key factor affecting the imaging quality, device performance and user experience. The traditional focusing technology has many limitations: slow focusing speed, poor optical axis stability, high power consumption and other problems. With the rapid development of consumer electronics, industrial automation, medical imaging and other fields, there is a higher requirement for the efficient and accurate focusing technology of imaging devices, and liquid lens is an important research direction. In the liquid lens, a "liquid lens" with adjustable focal length is used to realize the diversification of the focusing function of the liquid lens in combination with other fixed focal length lenses.

[0003] In order to ensure the amount of light, a lens barrel with a larger optical aperture is usually needed on the light entering side of the "liquid lens", and the lens group in the lens barrel usually includes a negative focal length lens and a positive focal length lens. In order to ensure the assembly of the lens group and the processing of the positive focal length lens, the edge thickness of the negative focal length lens is easily large, which undoubtedly increases the risk of stray light of the entire optical imaging system. SUMMARY

[0004] One advantage of the present application is to provide an optical imaging system which can reduce stray light between the first lens and the second lens under the condition of less design freedom, thereby ensuring the imaging quality of the lens.

[0005] The present application provides an optical imaging system, which comprises a first lens barrel and a second lens barrel in sequence from the object side to the image side along the optical axis direction;

[0006] The first lens barrel comprises, in sequence: a first lens with negative focal length, the object side surface of the first lens being concave; a second lens with positive focal length, the object side surface of the second lens being convex;

[0007] A first spacing element is arranged between the first lens and the second lens, and the first spacing element is arranged on the image side surface of the first lens;

[0008] The second lens barrel comprises, in sequence: a third lens with negative focal length, the object side surface of the third lens being convex, and the image side surface of the third lens being concave; a fourth lens with positive focal length, the object side surface of the fourth lens being convex, and the image side surface of the fourth lens being convex; a fifth lens with positive focal length, the object side surface of the fifth lens being convex, and the image side surface of the fifth lens being concave; a sixth lens with negative focal length, the image side surface of the sixth lens being concave;

[0009] A third spacer element is arranged between the third lens and the fourth lens, and the third spacer element is arranged on an image side of the third lens;

[0010] A fourth spacer element is arranged between the fourth lens and the fifth lens, and the fourth spacer element is arranged on an image side of the fourth lens;

[0011] A fifth spacer element is arranged between the fifth lens and the sixth lens, and the fifth spacer element is arranged on an image side of the fifth lens;

[0012] An autofocus assembly is arranged between the second lens and the third lens;

[0013] The optical imaging system satisfies: 2.15 < (Dbs-dbs) / (Dam-dam) < 2.95, 0.07 ≤ (D1s-d1s) / f12 ≤ 0.58; wherein Dbs is an outer diameter of an object side of the second lens barrel, dbs is an inner diameter of the object side of the second lens barrel, Dam is an outer diameter of an image side of the first lens barrel, dam is an inner diameter of the image side of the first lens barrel, D1s is an outer diameter of an object side of the first spacer element, d1s is an inner diameter of the object side of the first spacer element, and f12 is a combined focal length of the first lens and the second lens.

[0014] In some embodiments, the optical imaging system further satisfies: 1.25 < f3456 / Lb < 2.30, wherein f3456 is a combined focal length of the third lens, the fourth lens, the fifth lens, and the sixth lens, and Lb is a maximum height of the second lens barrel.

[0015] In some embodiments, the optical imaging system further satisfies: 0.90 < EP01 / T12 < 3.80, wherein EP01 is a distance along an optical axis from an object side of the first lens barrel to an object side of the first spacer element, and T12 is an air separation of the first lens and the second lens along the optical axis.

[0016] In some embodiments, the optical imaging system further satisfies: -2.15 ≤ f1 / La ≤ -1.56, wherein f1 is an effective focal length of the first lens, and La is a maximum height of the first lens barrel.

[0017] In some embodiments, the optical imaging system further satisfies: 1.50 < d1m / R3 < 2.85, wherein d1m is an inner diameter of an image side of the first spacer element, and R3 is a radius of curvature of an object side of the second lens.

[0018] In some of the embodiments, the optical imaging system further satisfies: 8.60 < f4 / (EP34+CP4) < 10.75, where f4 is an effective focal length of the fourth lens, EP34 is a distance along an optical axis direction from an object side surface of the third spacer element to an image side surface of the fourth spacer element, and CP4 is a maximum thickness of the fourth spacer element along the optical axis direction.

[0019] In some of the embodiments, the optical imaging system further satisfies: 2.25 ≤ |f56| / (D5s+D5m) ≤ 3.41, where f56 is a combined focal length of the fifth lens and the sixth lens, D5s is an outer diameter of an object side surface of the fifth spacer element, and D5m is an outer diameter of an image side surface of the fifth spacer element.

[0020] In some of the embodiments, the optical imaging system further satisfies: 3.50 ≤ (Das-das) / CT1 ≤ 6.36, where Das is an outer diameter of an object side surface of the first lens barrel, das is an inner diameter of the object side surface of the first lens barrel, and CT1 is a center thickness of the first lens along the optical axis.

[0021] In some of the embodiments, the optical imaging system further satisfies: 2.15 < d4s / EP45 < 2.45, where d4s is an inner diameter of an object side surface of the fourth spacer element, and EP45 is a distance along an optical axis direction from an image side surface of the fourth spacer element to an object side surface of the fifth spacer element.

[0022] In some of the embodiments, the optical imaging system further satisfies: -1.8 < f6 / (Dbm-dbm) < -1.4, where f6 is an effective focal length of the sixth lens, Dbm is an outer diameter of an image side surface of the second lens barrel, and dbm is an inner diameter of the image side surface of the second lens barrel.

[0023] In some of the embodiments, the optical imaging system further satisfies: -3.50 < f3 / d3s < -2.40, where f3 is an effective focal length of the third lens, and d3s is an inner diameter of an object side surface of the third spacer element.

[0024] In some of the embodiments, the optical imaging system further satisfies: 3.39 ≤ f5 / (d5m-d4m) ≤ 6.26, where f5 is an effective focal length of the fifth lens, d5m is an inner diameter of an image side surface of the fifth spacer element, and d4m is an inner diameter of an image side surface of the fourth spacer element.

[0025] In some of the embodiments, the optical imaging system further satisfies: 5.10 ≤ D4s / CT4 ≤ 7.87, where D4s is an outer diameter of an object side surface of the fourth spacer element, and CT4 is a center thickness of the fourth lens along the optical axis.

[0026] In some embodiments, the optical imaging system further satisfies: 0.70mm < d5s x (R9 / R10) < 1.15mm, where d5s is the inner diameter of the fifth spacer element object side surface, R9 is the radius of curvature of the fifth lens object side surface, and R10 is the radius of curvature of the fifth lens image side surface.

[0027] In summary, when the optical imaging system is in the environment of 2.15 < (Dbs-dbs) / (Dam-dam) < 2.95, the multi-group lens barrel is likely to introduce additional stray light between the first lens and the second lens due to the consideration of the bearing relationship between the lens barrel structure group and the lens. Therefore, the present application reasonably designs the inner and outer diameter sizes of the first spacer element according to the combined focal length of the first lens and the second lens by constraining 0.07 ≤ (D1s-d1s) / f12 ≤ 0.58, so as to reduce the stray light between the first lens and the second lens, thereby ensuring the imaging quality of the lens. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 is a size parameter diagram of an optical imaging system according to an embodiment of the present application;

[0029] Figure 2 is a structure parameter diagram of an optical imaging system according to an embodiment of the present application;

[0030] Figure 3 is a structure diagram of an optical imaging system according to embodiment one of the present application;

[0031] Figure 4 is a structure diagram of an optical imaging system according to embodiment two of the present application;

[0032] Figure 5 is a structure diagram of an optical imaging system according to embodiment three of the present application;

[0033] Figure 6A shows the axial chromatic aberration curve diagram of the optical imaging system according to the above embodiment one, the above embodiment two and the above embodiment three of the present application;

[0034] Figure 6B shows the astigmatism curve diagram of the optical imaging system according to the above embodiment one, the above embodiment two and the above embodiment three of the present application;

[0035] Figure 6C shows the distortion curve diagram of the optical imaging system according to the above embodiment one, the above embodiment two and the above embodiment three of the present application;

[0036] Figure 7is a structural schematic diagram of an optical imaging system according to Embodiment Four of the present application;

[0037] Figure 8 is a structural schematic diagram of an optical imaging system according to Embodiment Five of the present application;

[0038] Figure 9 is a structural schematic diagram of an optical imaging system according to Embodiment Six of the present application;

[0039] Figure 10A shows an axial chromatic aberration curve schematic diagram of the optical imaging system according to the above Embodiment Four, the above Embodiment Five and the above Embodiment Six of the present application;

[0040] Figure 10B shows an astigmatism curve schematic diagram of the optical imaging system according to the above Embodiment Four, the above Embodiment Five and the above Embodiment Six of the present application;

[0041] Figure 10C shows a distortion curve schematic diagram of the optical imaging system according to the above Embodiment Four, the above Embodiment Five and the above Embodiment Six of the present application;

[0042] Figure 11 is a structural schematic diagram of an optical imaging system according to Embodiment Seven of the present application;

[0043] Figure 12 is a structural schematic diagram of an optical imaging system according to Embodiment Eight of the present application;

[0044] Figure 13 is a structural schematic diagram of an optical imaging system according to Embodiment Nine of the present application;

[0045] Figure 14A shows an axial chromatic aberration curve schematic diagram of the optical imaging system according to the above Embodiment Seven, the above Embodiment Eight and the above Embodiment Nine of the present application;

[0046] Figure 14B shows an astigmatism curve schematic diagram of the optical imaging system according to the above Embodiment Seven, the above Embodiment Eight and the above Embodiment Nine of the present application;

[0047] Figure 14C shows a distortion curve schematic diagram of the optical imaging system according to the above Embodiment Seven, the above Embodiment Eight and the above Embodiment Nine of the present application;

[0048] Figure 15 is a spot diagram when the optical imaging system satisfies (Dbs-dbs) / (Dam-dam)=2.59, (D1s-d1s) / f12=0.28;

[0049] Figure 16a spot diagram when the optical imaging system satisfies (Dbs-dbs) / (Dam-dam) = 2.59, (D1s-d1s) / f12 = 0.83;

[0050] Figure 17 a spot diagram when the optical imaging system satisfies (Dbs-dbs) / (Dam-dam) = 2.59, (D1s-d1s) / f12 = 0.04. DETAILED DESCRIPTION

[0051] For a better understanding of the present application, various aspects of the present application will be described in greater detail below with reference to the accompanying drawings. It is to be noted that these detailed descriptions are merely exemplary of the application and should not be considered limiting in any way. Throughout this application, like reference numerals will be used to refer to like elements every where they occur. The statement "and / or" includes any and all combinations of one or more of the associated listed items.

[0052] It is noted that, in this specification, the terms first, second, third, etc. are merely used to distinguish one feature from another, and do not imply any limitation on the features. Thus, the first lens discussed below can also be called the second lens or the third lens, without departing from the teachings of the present application.

[0053] In the drawings, the thickness, size, and shape of the lenses have been slightly exaggerated for ease of explanation. Specifically, the shape of the spherical or aspherical surface shown in the drawings is shown by way of example. That is, the shape of the spherical or aspherical surface is not limited to the shape of the spherical or aspherical surface shown in the drawings. The drawings are merely examples and are not drawn to scale.

[0054] In this specification, the paraxial region refers to a region near the optical axis. If a lens surface is convex and the position of the convex surface is not specified, it means that the lens surface is convex at least in the paraxial region. If a lens surface is concave and the position of the concave surface is not specified, it means that the lens surface is concave at least in the paraxial region. The concave-convex can be determined depending on the sign of the R value (R refers to the radius of curvature in the paraxial region). In this specification, the surface of each lens closest to the object is referred to as the object side surface of the lens, and the surface of each lens closest to the imaging surface is referred to as the image side surface of the lens. In terms of the object side surface, when the R value is positive, it is determined to be convex, and when the R value is negative, it is determined to be concave. In terms of the image side surface, when the R value is positive, it is determined to be concave, and when the R value is negative, it is determined to be convex.

[0055] It should also be understood that the use of the terms "have", "has", "having", "include", "includes", "including", "contain", "contains", or "containing", when appearing in the specification, are used to indicate the presence of the stated feature, element, component, or step, but do not preclude the presence or addition of one or more other features, elements, components, steps, or groups thereof. Also, as used in the description herein, the phrase "at least one of" followed by a listing of two or more items means that at least one of the listed items is present at any given occurrence of the phrase. Further, as used herein, the phrase "and / or" between a first capability and a second capability means that "either the first capability, the second capability, or both capabilities are present." In addition, the use of "a" or "an" to describe an item is not intended to be construed as excluding the presence of more than one of such item. Furthermore, the use of the term "about" is intended to describe various amounts of uncertainty that can exist. These, and other such terms, can be used herein to describe intangible items, such as contextual measurements made by a machine, and / or to describe the inexactness or imprecision that can be associated with such measurements.

[0056] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an overly literal or overly formal sense unless expressly so defined herein.

[0057] It should be noted that the embodiments and features of the embodiments in the present application can be combined with each other without conflict. The following embodiments only express several embodiments of the present application, which are described in a more specific and detailed manner, but should not be construed as limiting the scope of the patent of the present application. It should be noted that for those skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are within the scope of protection of the present application. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0058] Please refer to Figure 1 and Figure 2 According to an aspect of the present application, an optical imaging system is provided, which comprises a first lens barrel and a second lens barrel in sequence from an object side to an image side along an optical axis;

[0059] The first lens barrel comprises, in sequence, a first lens with a negative focal length, the object side surface of the first lens being concave; and a second lens with a positive focal length, the object side surface of the second lens being convex;

[0060] A first spacing element is arranged between the first lens and the second lens, and the first spacing element is arranged against the image side surface of the first lens;

[0061] The second lens barrel sequentially comprises: a third lens with negative refractive power, the object side surface of the third lens is convex, and the image side surface of the third lens is concave; a fourth lens with positive refractive power, the object side surface of the fourth lens is convex, and the image side surface of the fourth lens is convex; a fifth lens with positive refractive power, the object side surface of the fifth lens is convex, and the image side surface of the fifth lens is concave; and a sixth lens with negative refractive power, the image side surface of the sixth lens is concave.

[0062] A third spacing element is arranged between the third lens and the fourth lens, and the third spacing element is arranged on the image side surface of the third lens.

[0063] A fourth spacing element is arranged between the fourth lens and the fifth lens, and the fourth spacing element is arranged on the image side surface of the fourth lens.

[0064] A fifth spacing element is arranged between the fifth lens and the sixth lens, and the fifth spacing element is arranged on the image side surface of the fifth lens.

[0065] An autofocus assembly is arranged between the second lens and the third lens.

[0066] The optical imaging system satisfies: 2.15 < (Dbs-dbs) / (Dam-dam) < 2.95, 0.07 ≤ (D1s-d1s) / f12 ≤ 0.58; wherein Dbs is the outer diameter of the object side surface of the second lens barrel, dbs is the inner diameter of the object side surface of the second lens barrel, Dam is the outer diameter of the image side surface of the first lens barrel, dam is the inner diameter of the image side surface of the first lens barrel, D1s is the outer diameter of the object side surface of the first spacing element, d1s is the inner diameter of the object side surface of the first spacing element, and f12 is the combined focal length of the first lens and the second lens.

[0067] In summary, when the optical imaging system is in the environment of 2.15 < (Dbs-dbs) / (Dam-dam) < 2.95, the multi-group lens barrel is easy to introduce additional stray light between the first lens and the second lens due to the consideration of the bearing relationship between the lens structure groups and the lenses. Therefore, by constraining 0.07 ≤ (D1s-d1s) / f12 ≤ 0.58, the inner and outer diameters of the first spacing element are reasonably designed according to the combined focal length of the first lens and the second lens, so as to reduce the stray light between the first lens and the second lens, thereby ensuring the imaging quality of the lens.

[0068] As Figure 15 shown, Figure 15The image shows the spot pattern when the optical imaging system satisfies (Dbs-dbs) / (Dam-dam)=2.59 and (D1s-d1s) / f12=0.28. As can be seen from the figure, when the optical imaging system satisfies the constraints of 2.15<(Dbs-dbs) / (Dam-dam)<2.95 and 0.07≤(D1s-d1s) / f12≤0.58 provided in this application, there is less stray light in the spot pattern, the risk of stray light is weaker, and the imaging quality is better.

[0069] like Figure 16 As shown, Figure 16 The image shows the spot pattern when the optical imaging system satisfies (Dbs-dbs) / (Dam-dam)=2.59 and (D1s-d1s) / f12=0.83. As can be seen from the image, when the shape of the first spacer element in the optical imaging system exceeds the upper limit of the above relationship, a large number of stray lights with a regular distribution appear on one side of the spot pattern. The stray light risk is high and the imaging quality is poor.

[0070] like Figure 17 As shown, Figure 17 The image shows the spot pattern when the optical imaging system satisfies (Dbs-dbs) / (Dam-dam)=2.59 and (D1s-d1s) / f12=0.04. As can be seen from the image, when the shape of the first spacer element in the optical imaging system exceeds the lower limit of the above relationship, a large number of stray lights with regular distribution appear at the edge of the spot pattern. The stray light risk is high and the imaging quality is poor.

[0071] According to some embodiments of this application, the optical imaging system further satisfies: 0.90 < EP01 / T12 < 3.80, where EP01 is the distance along the optical axis from the side of the first lens barrel to the side of the first spacer element, and T12 is the air gap between the first lens and the second lens along the optical axis. Reasonably controlling this conditional range ensures the rationality of the position of the first spacer element, prevents excessive deformation of the first spacer element, and avoids abnormalities such as affecting lens illumination and causing light leakage.

[0072] According to some embodiments of this application, the optical imaging system also satisfies: -2.15 ≤ f1 / La ≤ -1.56, where f1 is the effective focal length of the first lens and La is the maximum height of the first lens barrel. By reasonably controlling this conditional range, performance degradation caused by excessive lens sensitivity can be effectively controlled while maintaining a miniaturized design, and a reasonable light trend in the system can be ensured.

[0073] According to some embodiments of the present application, the optical imaging system further satisfies: 1.50 < dlm / R3 < 2.85, wherein dlm is an inner diameter of an image side surface of the first spacer element, and R3 is a curvature radius of an object side surface of the second lens. By restricting the ratio of the first spacer inner diameter and the second lens object side surface curvature radius, space for stray light improvement can be provided without affecting optical performance, and the stray light is blocked by adjusting the inner diameter to improve quality.

[0074] According to some embodiments of the present application, the optical imaging system further satisfies: 8.60 < f4 / (EP34+CP4) < 10.75, wherein f4 is an effective focal length of the fourth lens, EP34 is a distance along an optical axis direction from the image side surface of the third spacer element to the object side surface of the fourth spacer element, and CP4 is a maximum thickness of the fourth spacer element along the optical axis direction. Reasonable control of the range of this conditional expression can ensure lens structure assembly stability and improve product yield.

[0075] According to some embodiments of the present application, the optical imaging system further satisfies: 2.25 ≤ |f56| / (D5s+D5m) ≤ 3.41, wherein f56 is a combined focal length of the fifth lens and the sixth lens, D5s is an outer diameter of an object side surface of the fifth spacer element, and D5m is an outer diameter of an image side surface of the fifth spacer element. Reasonable control of the range of this conditional expression can control the length of the bearing member to avoid deformation of the element caused by high temperature and humidity, cause lens performance variation, and reduce the size of the outer shape, thereby reducing the outer diameter of the lens barrel and reducing costs.

[0076] According to some embodiments of the present application, the optical imaging system further satisfies: 3.50 ≤ (Das-das) / CT1 ≤ 6.36, wherein Das is an outer diameter of an object side surface of the first lens barrel, das is an inner diameter of the object side surface of the first lens barrel, and CT1 is a center thickness of the first lens on the optical axis. Reasonable control of the range of this conditional expression can reasonably design the inner and outer diameters of the lens barrel according to the thickness of the first lens, ensure the length of the bearing member without affecting the light of the optical system and the module cooperation, and improve the lens assembly stability.

[0077] According to some embodiments of the present application, the optical imaging system further satisfies: 2.15 < d4s / EP45 < 2.45, wherein d4s is an inner diameter of an object side surface of the fourth spacer element, and EP45 is a distance along an optical axis direction from the image side surface of the fourth spacer element to the object side surface of the fifth spacer element. Reasonable control of the range of this conditional expression can design the inner diameter of the fourth spacer element according to the distance between the fourth and fifth spacer elements, avoid abnormal problems such as light leakage and swelling of the lens, provide space for stray light improvement, and improve imaging quality.

[0078] According to some embodiments of the present application, the optical imaging system further satisfies: -1.8 < f6 / (Dbm-dbm) < -1.4, wherein f6 is the effective focal length of the sixth lens, Dbm is the outer diameter of the second lens barrel image side surface, and dbm is the inner diameter of the second lens barrel image side surface. Reasonably controlling the range of this conditional expression, adjusting the inner and outer diameters of the second lens barrel image side surface according to the focal length of the sixth lens, under the premise of ensuring that the main light is not blocked and can be processed, the outer diameter of the lens barrel is minimized, the structure space is reduced, the cost is saved, and the market competitiveness is improved.

[0079] According to some embodiments of the present application, the optical imaging system further satisfies: -3.50 < f3 / d3s < -2.40, wherein f3 is the effective focal length of the third lens, and d3s is the inner diameter of the third spacer element object side surface. The effective focal length of the lens affects the size of the light entering the lens aperture, and reasonably controlling the range of this conditional expression can avoid excessive stray light caused by light incidence and improve imaging quality under the premise of not affecting the optical system.

[0080] According to some embodiments of the present application, the optical imaging system further satisfies: 3.39 ≤ f5 / (d5m-d4m) ≤ 6.26, wherein f5 is the effective focal length of the fifth lens, d5m is the inner diameter of the fifth spacer element image side surface, and d4m is the inner diameter of the fourth spacer element image side surface. Reasonably controlling the range of this conditional expression can avoid excessive stray light caused by lens mechanisms and improve imaging quality under the premise of not affecting the optical system.

[0081] According to some embodiments of the present application, the optical imaging system further satisfies: 5.10 ≤ D4s / CT4 ≤ 7.87, wherein D4s is the outer diameter of the fourth spacer element object side surface, and CT4 is the center thickness of the fourth lens on the optical axis. Reasonably controlling the range of this conditional expression, adjusting the outer diameter of the adjacent supporting element according to the center thickness of the fourth lens, ensures the reasonable diameter-thickness ratio of the lens, and can control the length of the supporting part to avoid deformation caused by excessive length of the supporting part, which causes abnormal performance of the lens.

[0082] According to some embodiments of the present application, the optical imaging system further satisfies: 0.70 mm < d5s x (R9 / R10) < 1.15 mm, wherein d5s is the inner diameter of the fifth spacer element object side surface, R9 is the curvature radius of the object side surface of the fifth lens, and R10 is the curvature radius of the image side surface of the fifth lens. The curvature radius affects the trend and aperture of the light in the lens, and reasonably controlling the range of this conditional expression can design the inner diameter of the adjacent supporting element, avoid the entry of excessive light under the condition of not affecting the optical system, and improve the imaging quality.

[0083] According to another aspect of the present application, the present application provides an optical imaging system comprising a first lens barrel and a second lens barrel in sequence from an object side to an image side along an optical axis direction;

[0084] The first lens barrel comprises in sequence: a first lens with negative focal length, the object side surface of the first lens being concave; a second lens with positive focal length, the object side surface of the second lens being convex;

[0085] A first spacer element is arranged between the first lens and the second lens, and the first spacer element is arranged against the image side surface of the first lens;

[0086] The second lens barrel comprises in sequence: a third lens with negative focal length, the object side surface of the third lens being convex, the image side surface of the third lens being concave; a fourth lens with positive focal length, the object side surface of the fourth lens being convex, the image side surface of the fourth lens being convex; a fifth lens with positive focal length, the object side surface of the fifth lens being convex, the image side surface of the fifth lens being concave; a sixth lens with negative focal length, the image side surface of the sixth lens being concave;

[0087] A third spacer element is arranged between the third lens and the fourth lens, and the third spacer element is arranged against the image side surface of the third lens;

[0088] A fourth spacer element is arranged between the fourth lens and the fifth lens, and the fourth spacer element is arranged against the image side surface of the fourth lens;

[0089] A fifth spacer element is arranged between the fifth lens and the sixth lens, and the fifth spacer element is arranged against the image side surface of the fifth lens;

[0090] An autofocus assembly is arranged between the second lens and the third lens;

[0091] The optical imaging system satisfies: 2.15 < (Dbs-dbs) / (Dam-dam) < 2.95, 1.25 < f3456 / Lb < 2.30, wherein Dbs is the outer diameter of the object side surface of the second lens barrel, dbs is the inner diameter of the object side surface of the second lens barrel, Dam is the outer diameter of the image side surface of the first lens barrel, dam is the inner diameter of the image side surface of the first lens barrel, f3456 is the combined focal length of the third lens, the fourth lens, the fifth lens and the sixth lens, and Lb is the maximum height of the second lens barrel.

[0092] In summary, when the optical imaging system satisfies 2.15 < (Dbs-dbs) / (Dam-dam) < 2.95, there is still a problem of lens barrel protrusion between the two lens barrels. This application constrains the length of the second lens barrel by 1.25 < f3456 / Lb < 2.30, which can reasonably design the height of the second lens barrel and prevent problems such as lens barrel protrusion from causing performance and appearance defects and reducing the actual product yield.

[0093] It should be noted that those skilled in the art should understand that, without departing from the technical solutions claimed in this application, the number of spacers constituting the optical imaging system can be changed to obtain the various results and advantages described in this specification, and this application does not specifically limit this. For example, the optical imaging lens may also include a number of spacers other than those described in the above embodiments, as needed.

[0094] Some specific, non-limiting embodiments of the above-described implementations of this application are described in more detail below with reference to the accompanying drawings. For ease of description, in the following embodiments, OBJ represents the object plane of the optical imaging system, STO represents the surface of the aperture stop, S1 represents the object-side surface of the first lens E1, S2 represents the image-side surface of the first lens E1, S3 represents the object-side surface of the second lens E2, S4 represents the image-side surface of the second lens E2, S5 is the first surface of the autofocus assembly ET, S6 is the second surface of the autofocus assembly ET, S7 is the third surface of the autofocus assembly ET, S8 is the fourth surface of the autofocus assembly ET, S9 represents the object-side surface of the third lens E3, S10 represents the image-side surface of the third lens E3, S11 represents the object-side surface of the fourth lens E4, S12 represents the image-side surface of the fourth lens E4, S13 represents the object-side surface of the fifth lens E5, S14 represents the image-side surface of the fifth lens E5, S15 represents the object-side surface of the sixth lens, S16 represents the image-side surface of the sixth lens E6, S17 represents the object-side surface of the filter E7, S18 represents the image-side surface of the filter E7, and S19 represents the image plane.

[0095] Example 1

[0096] like Figure 3 As shown, in this embodiment, the optical imaging system includes a first lens barrel Pa and a second lens barrel Pb. The first lens barrel Pa contains a first lens E1 and a second lens E2. The second lens barrel Pb contains a third lens E3, a fourth lens E4, a fifth lens E5, and a sixth lens E6. An autofocus assembly ET is provided between the second lens E2 and the third lens E3. The autofocus assembly ET is a liquid lens.

[0097] In this embodiment, the first lens barrel Pa further comprises a first spacer element P1 disposed between the first lens E1 and the second lens E2, the second lens barrel Pb further comprises a third spacer element P3 disposed between the third lens E3 and the fourth lens E4, a fourth spacer element P4 disposed between the fourth lens E4 and the fifth lens E5, and a fifth spacer element P5 disposed between the fifth lens E5 and the sixth lens E6.

[0098] In this embodiment, the first lens E1 has a negative focal power, the object side surface of the first lens E1 is a concave surface, and the image side surface of the first lens E1 is a concave surface; the second lens E2 has a positive focal power, the object side surface of the second lens E2 is a convex surface, and the image side surface of the second lens E2 is a concave surface; the third lens E3 has a negative focal power, the object side surface of the third lens E3 is a convex surface, and the image side surface of the third lens E3 is a concave surface; the fourth lens E4 has a positive focal power, the object side surface of the fourth lens E4 is a convex surface, and the image side surface of the fourth lens E4 is a convex surface; the fifth lens E5 has a positive focal power, the object side surface of the fifth lens E5 is a convex surface, and the image side surface of the fifth lens E5 is a concave surface; and the sixth lens E6 has a negative focal power, the object side surface of the sixth lens E6 is a concave surface, and the image side surface of the sixth lens E6 is a concave surface.

[0099] In addition, Table 1 shows the basic optical parameters of the optical imaging system of Embodiment One, wherein the units of the radius of curvature, thickness / distance are millimeters (mm).

[0100] Table 1

[0101]

[0102] In this embodiment, the object side surface and the image side surface of any one of the first lens E1 to the sixth lens E6 are aspherical surfaces, and the surface type x of each aspherical surface can be defined by, but not limited to, the following aspherical surface formula:

[0103] ;

[0104] wherein x is the sag of the aspherical surface at a height of h along the optical axis, c is the paraxial curvature of the aspherical surface, c = 1 / R (i.e., the paraxial curvature c is the inverse of the radius of curvature R in Table 1 above), k is the conic coefficient, and Ai is the correction coefficient of the i-th order of the aspherical surface. Table 2 below shows the high-order term coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20 that can be used for the aspherical surfaces S1 to S4, S9 to S16 in Embodiment One.

[0105] Table 2

[0106]

[0107] In addition, the following Table 3 also shows the values of RT1 and RT2 of the autofocus assembly ET in the three different object distances in Table 1 above. The units of D1, RT1 and RT2 in the table are (mm).

[0108] Table 3

[0109]

[0110] Example Two

[0111] As Figure 4 shown in the embodiment, the optical imaging system includes a first lens barrel Pa and a second lens barrel Pb, the first lens barrel Pa includes a first lens E1 and a second lens E2, the second lens barrel Pb includes a third lens E3, a fourth lens E4, a fifth lens E5 and a sixth lens E6, and an autofocus assembly ET is arranged between the second lens E2 and the third lens E3, and the autofocus assembly ET is a liquid lens.

[0112] In the embodiment, the first lens barrel Pa further includes a first spacer element P1 arranged between the first lens E1 and the second lens E2, the second lens barrel Pb further includes a third spacer element P3 arranged between the third lens E3 and the fourth lens E4, a fourth spacer element P4 arranged between the fourth lens E4 and the fifth lens E5, and a fifth spacer element P5 arranged between the fifth lens E5 and the sixth lens E6.

[0113] It is worth noting that, compared with the above-mentioned Example One, the optical imaging system of the present embodiment has the same optical parameters, i.e., the basic optical parameter table of the optical imaging system of the present embodiment is the same as Table 1, the aspherical surface coefficient table is the same as Table 2, and the basic optical parameters of the autofocus assembly ET in different object distances are the same as Table 3. However, the optical imaging system of the present embodiment and the optical imaging system of the above-mentioned Example One have different structural parameters, i.e., the difference between the present embodiment and the above-mentioned Example One lies in that the size values of some structural parameters of the lens barrel and the spacer element in the optical imaging system are different.

[0114] Example Three

[0115] As Figure 5 shown in the embodiment, the optical imaging system includes a first lens barrel Pa and a second lens barrel Pb, the first lens barrel Pa includes a first lens E1 and a second lens E2, the second lens barrel Pb includes a third lens E3, a fourth lens E4, a fifth lens E5 and a sixth lens E6, and an autofocus assembly ET is arranged between the second lens E2 and the third lens E3, and the autofocus assembly ET is a liquid lens.

[0116] In this embodiment, the first lens barrel Pa further comprises a first spacer element P1 disposed between the first lens E1 and the second lens E2, the second lens barrel Pb further comprises a third spacer element P3 disposed between the third lens E3 and the fourth lens E4, a fourth spacer element P4 disposed between the fourth lens E4 and the fifth lens E5, and a fifth spacer element P5 disposed between the fifth lens E5 and the sixth lens E6.

[0117] It is worth noting that, compared with the above-mentioned embodiment one, the optical imaging system of this embodiment three has the same optical parameters, i.e., the basic optical parameter table of the optical imaging system of this embodiment three is the same as Table 1, the aspheric surface coefficient table is the same as Table 2, and the basic optical parameters of the autofocus assembly ET at different object distances are the same as Table 3. The optical imaging system of this embodiment three and the optical imaging system of the above-mentioned embodiment one have different structural parameters, i.e., the difference between this embodiment three and the above-mentioned embodiment one lies in that the size values of some structural parameters of the lens barrel and the spacer element in the optical imaging system are different.

[0118] In summary, the on-axis chromatic aberration curves of the optical imaging systems in the embodiment one, the embodiment two and the embodiment three are shown in Figure 6A , which represent the convergence focus deviation degrees of light rays of different wavelengths after passing through the optical imaging systems; the astigmatism curves of the optical imaging systems in the embodiment one, the embodiment two and the embodiment three are shown in Figure 6B , which represent the meridional image surface bending degrees and sagittal image surface bending degrees; and the distortion curves of the optical imaging systems in the embodiment one, the embodiment two and the embodiment three are shown in Figure 6C , which represent the actual image deformation degrees. According to Figure 6A , Figure 6B and Figure 6C , it can be known that the optical imaging systems in the embodiment one, the embodiment two and the embodiment three can all achieve good imaging quality.

[0119] Embodiment Four

[0120] As shown in Figure 7 , the optical imaging system comprises a first lens barrel Pa and a second lens barrel Pb, the first lens barrel Pa comprises a first lens E1 and a second lens E2, the second lens barrel Pb comprises a third lens E3, a fourth lens E4, a fifth lens E5 and a sixth lens E6, and an autofocus assembly ET is arranged between the second lens E2 and the third lens E3, and the autofocus assembly ET adopts a liquid lens.

[0121] In this embodiment, the first lens barrel Pa further comprises a first spacer element P1 disposed between the first lens E1 and the second lens E2, the second lens barrel Pb further comprises a third spacer element P3 disposed between the third lens E3 and the fourth lens E4, a fourth spacer element P4 disposed between the fourth lens E4 and the fifth lens E5, and a fifth spacer element P5 disposed between the fifth lens E5 and the sixth lens E6.

[0122] In this embodiment, the first lens E1 has a negative focal power, the object side surface of the first lens E1 is a concave surface, and the image side surface of the first lens E1 is a concave surface; the second lens E2 has a positive focal power, the object side surface of the second lens E2 is a convex surface, and the image side surface of the second lens E2 is a convex surface; the third lens E3 has a negative focal power, the object side surface of the third lens E3 is a convex surface, and the image side surface of the third lens E3 is a concave surface; the fourth lens E4 has a positive focal power, the object side surface of the fourth lens E4 is a convex surface, and the image side surface of the fourth lens E4 is a convex surface; the fifth lens E5 has a positive focal power, the object side surface of the fifth lens E5 is a convex surface, and the image side surface of the fifth lens E5 is a concave surface; and the sixth lens E6 has a negative focal power, the object side surface of the sixth lens E6 is a concave surface, and the image side surface of the sixth lens E6 is a concave surface.

[0123] In addition, Table 4 shows the basic optical parameters of the optical imaging system of Embodiment Four, wherein the units of the radius of curvature, thickness / distance are all millimeters (mm).

[0124] Table 4

[0125]

[0126] In this embodiment, the object side surface and the image side surface of any one of the first lens E1 to the sixth lens E6 are all aspheric surfaces, and the surface type x of each aspheric surface can be defined by, but not limited to, the aspheric surface formula of Embodiment One.

[0127] The following Table 5 shows the high-order term coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20 of the aspheric surfaces S1 to S4, S9 to S16 that can be used in Embodiment Four.

[0128] Table 5

[0129]

[0130] In addition, the following Table 6 also shows the values of RT1 and RT2 of the autofocus assembly ET in three different object distance states in Table 4 above. The units of D1, RT1 and RT2 in the table are all (mm).

[0131] Table 6

[0132]

[0133] Embodiment Five

[0134] AsFigure 8 As shown, the optical imaging system includes a first lens barrel Pa and a second lens barrel Pb. The first lens barrel Pa contains a first lens E1 and a second lens E2. The second lens barrel Pb contains a third lens E3, a fourth lens E4, a fifth lens E5, and a sixth lens E6. An autofocus assembly ET is provided between the second lens E2 and the third lens E3. The autofocus assembly ET uses a liquid lens.

[0135] In this embodiment, the first lens barrel Pa further includes a first spacer element P1 placed between the first lens E1 and the second lens E2, and the second lens barrel Pb further includes a third spacer element P3 placed between the third lens E3 and the fourth lens E4, a fourth spacer element P4 placed between the fourth lens E4 and the fifth lens E5, and a fifth spacer element P5 placed between the fifth lens E5 and the sixth lens E6.

[0136] It is worth noting that, compared with Embodiment 4 above, the optical imaging system of Embodiment 5 has the same optical parameters. That is, the basic optical parameter table of the optical imaging system of Embodiment 5 is the same as Table 4, the aspherical coefficient table is the same as Table 5, and the basic optical parameters of the autofocus component ET at different object distances are the same as Table 6. However, the optical imaging system of Embodiment 5 has different structural parameters from the optical imaging system of Embodiment 4 above. That is, the difference between Embodiment 5 and Embodiment 4 above lies in the fact that the dimensional values ​​of some structural parameters of the lens barrel and the spacer element in the optical imaging system are different.

[0137] Example 6

[0138] like Figure 9 As shown, the optical imaging system includes a first lens barrel Pa and a second lens barrel Pb. The first lens barrel Pa contains a first lens E1 and a second lens E2. The second lens barrel Pb contains a third lens E3, a fourth lens E4, a fifth lens E5, and a sixth lens E6. An autofocus assembly ET is provided between the second lens E2 and the third lens E3. The autofocus assembly ET uses a liquid lens.

[0139] In this embodiment, the first lens barrel Pa further includes a first spacer element P1 placed between the first lens E1 and the second lens E2, and the second lens barrel Pb further includes a third spacer element P3 placed between the third lens E3 and the fourth lens E4, a fourth spacer element P4 placed between the fourth lens E4 and the fifth lens E5, and a fifth spacer element P5 placed between the fifth lens E5 and the sixth lens E6.

[0140] It is worth noting that the optical imaging system of this embodiment six has the same optical parameters compared with the above-mentioned embodiment four, i.e. the basic optical parameter table of the optical imaging system of this embodiment six is the same as table 4, the aspheric surface coefficient table is the same as table 5, and the basic optical parameters of the auto-focusing assembly ET at different object distances are the same as table 6. The optical imaging system of this embodiment six and the optical imaging system of the above-mentioned embodiment four have different structural parameters, i.e. the difference between this embodiment six and the above-mentioned embodiment four lies in that the size values of some structural parameters of the lens barrel and the spacer elements in the optical imaging system are different.

[0141] In summary, the on-axis chromatic aberration curves of the optical imaging systems in embodiment four, embodiment five and embodiment six are shown in Figure 10A , which represent the convergence focus deviation of light rays of different wavelengths after passing through the optical imaging system; the astigmatism curves of the optical imaging systems in embodiment four, embodiment five and embodiment six are shown in Figure 10B , which represent the meridional image surface curvature and sagittal image surface curvature; the distortion curves of the optical imaging systems in embodiment four, embodiment five and embodiment six are shown in Figure 10C , which represent the deformation degree of the actual image. According to Figure 10A , Figure 10B , Figure 10C , it can be known that the optical imaging systems in embodiment four, embodiment five and embodiment six can all achieve good imaging quality.

[0142] Embodiment seven

[0143] As shown in Figure 11 , the optical imaging system comprises a first lens barrel Pa and a second lens barrel Pb, the first lens barrel Pa comprises a first lens E1 and a second lens E2, the second lens barrel Pb comprises a third lens E3, a fourth lens E4, a fifth lens E5 and a sixth lens E6, and an auto-focusing assembly ET is arranged between the second lens E2 and the third lens E3, and the auto-focusing assembly ET adopts a liquid lens.

[0144] In this embodiment, the first lens barrel Pa further comprises a first spacer element P1 arranged between the first lens E1 and the second lens E2, the second lens barrel Pb further comprises a third spacer element P3 arranged between the third lens E3 and the fourth lens E4, a fourth spacer element P4 arranged between the fourth lens E4 and the fifth lens E5, and a fifth spacer element P5 arranged between the fifth lens E5 and the sixth lens E6.

[0145] In this embodiment, the first lens E1 has negative optical power, with its object-side surface being concave and its image-side surface being convex; the second lens E2 has positive optical power, with its object-side surface being convex and its image-side surface being concave; the third lens E3 has negative optical power, with its object-side surface being convex and its image-side surface being concave; the fourth lens E4 has positive optical power, with its object-side surface being convex and its image-side surface being convex; the fifth lens E5 has positive optical power, with its object-side surface being convex and its image-side surface being concave; and the sixth lens E6 has negative optical power, with its object-side surface being convex and its image-side surface being concave.

[0146] In addition, Table 7 shows the basic optical parameters of the optical imaging system of Embodiment 7, where the units of radius of curvature and thickness / distance are millimeters (mm).

[0147] Table 7

[0148]

[0149] In this embodiment, the object-side surface and image-side surface of any one of the first lens E1 to the sixth lens E6 are aspherical, and the surface shape x of each aspherical lens can be defined using, but is not limited to, the aspherical formula of Embodiment 1.

[0150] Table 8 below shows the higher-order term coefficients A4, A6, A8, A10, A12, A14, A16, A18, and A20 that can be used for each aspherical mirror S1 to S4 and S9 to S16 in Example 7.

[0151] Table 8

[0152]

[0153] In addition, Table 9 below shows the values ​​of RT1 and RT2 for the autofocus component ET in Table 7 above at three different object distances. The units for D1, RT1, and RT2 in the table are all (mm).

[0154] Table 9

[0155]

[0156] Example 8

[0157] like Figure 12 As shown, the optical imaging system includes a first lens barrel Pa and a second lens barrel Pb. The first lens barrel Pa contains a first lens E1 and a second lens E2. The second lens barrel Pb contains a third lens E3, a fourth lens E4, a fifth lens E5, and a sixth lens E6. An autofocus assembly ET is provided between the second lens E2 and the third lens E3. The autofocus assembly ET uses a liquid lens.

[0158] In this embodiment, the first lens barrel Pa further comprises a first spacer element P1 disposed between the first lens E1 and the second lens E2, the second lens barrel Pb further comprises a third spacer element P3 disposed between the third lens E3 and the fourth lens E4, a fourth spacer element P4 disposed between the fourth lens E4 and the fifth lens E5, and a fifth spacer element P5 disposed between the fifth lens E5 and the sixth lens E6.

[0159] It is worth noting that, compared with the above-mentioned embodiment seven, the optical imaging system of this embodiment eight has the same optical parameters, i.e., the basic optical parameter table of the optical imaging system of this embodiment eight is the same as Table 7, the aspherical surface coefficient table is the same as Table 8, and the basic optical parameters of the autofocus assembly ET at different object distances are the same as Table 9. The optical imaging system of this embodiment eight and the optical imaging system of the above-mentioned embodiment seven have different structural parameters, i.e., the difference between this embodiment eight and the above-mentioned embodiment seven lies in that the size values of some structural parameters of the lens barrel and the spacer element in the optical imaging system are different.

[0160] Embodiment nine

[0161] As shown in Figure 13 , the optical imaging system comprises a first lens barrel Pa and a second lens barrel Pb, the first lens barrel Pa comprises a first lens E1 and a second lens E2, the second lens barrel Pb comprises a third lens E3, a fourth lens E4, a fifth lens E5, and a sixth lens E6, and an autofocus assembly ET is arranged between the second lens E2 and the third lens E3, and the autofocus assembly ET adopts a liquid lens.

[0162] In this embodiment, the first lens barrel Pa further comprises a first spacer element P1 disposed between the first lens E1 and the second lens E2, the second lens barrel Pb further comprises a third spacer element P3 disposed between the third lens E3 and the fourth lens E4, a fourth spacer element P4 disposed between the fourth lens E4 and the fifth lens E5, and a fifth spacer element P5 disposed between the fifth lens E5 and the sixth lens E6.

[0163] It is worth noting that, compared with the above-mentioned embodiment seven, the optical imaging system of this embodiment nine has the same optical parameters, i.e., the basic optical parameter table of the optical imaging system of this embodiment nine is the same as Table 7, the aspherical surface coefficient table is the same as Table 8, and the basic optical parameters of the autofocus assembly ET at different object distances are the same as Table 9. The optical imaging system of this embodiment nine and the optical imaging system of the above-mentioned embodiment seven have different structural parameters, i.e., the difference between this embodiment nine and the above-mentioned embodiment seven lies in that the size values of some structural parameters of the lens barrel and the spacer element in the optical imaging system are different.

[0164] In summary, the on-axis chromatic aberration curves of the optical imaging systems in the embodiment seven, the embodiment eight, and the embodiment nine are as shown inFigure 14A Figure 7 shows the astigmatism curves of the optical imaging system in Example 7, Example 8 and Example 9, which represent the degree of curvature of the meridional image plane and the degree of curvature of the sagittal image plane. Figure 14B Figure 8 shows the distortion curves of the optical imaging system in Example 7, Example 8 and Example 9, which represent the degree of deformation of the actual image. Figure 14C Figure 9 shows the lateral chromatic aberration curves of the optical imaging system in Example 7, Example 8 and Example 9, which represent the degree of deviation of the convergent focal points of light rays of different wavelengths after passing through the optical imaging system. Figure 14A Figure 14B Figure 14C It can be seen that the optical imaging systems in Example 7, Example 8 and Example 9 can achieve good imaging quality.

[0165] In summary, in Example 1 to Example 9, the effective focal lengths f1 to f6 of the first lens E1 to the sixth lens E6, the combined focal length f12 of the first lens E1 and the second lens E2, the combined focal length f56 of the fifth lens E5 and the sixth lens E6, and the combined focal length f3456 of the third lens E3 to the sixth lens E6 of the optical imaging system are as shown in Table 10 below.

[0166] Table 10

[0167]

[0168] In addition, the structural parameters of the optical imaging system in Example 1 to Example 9 are as shown in Table 11 below, wherein the meaning of each parameter is as follows: d1s is the inner diameter of the object side surface of the first spacer element, d1m is the inner diameter of the image side surface of the first spacer element, D1s is the outer diameter of the object side surface of the first spacer element, d3s is the inner diameter of the object side surface of the third spacer element, d4s is the inner diameter of the object side surface of the fourth spacer element, d4m is the inner diameter of the image side surface of the fourth spacer element, D4s is the outer diameter of the object side surface of the fourth spacer element, d5s is the inner diameter of the object side surface of the fifth spacer element, d5m is the inner diameter of the image side surface of the fifth spacer element, D5s is the outer diameter of the object side surface of the fifth spacer element, D5m is the outer diameter of the image side surface of the fifth spacer element, das is the inner diameter of the object side surface of the first lens barrel, dam is the inner diameter of the image side surface of the first lens barrel, Das is the outer diameter of the object side surface of the first lens barrel, Dam is the outer diameter of the image side surface of the first lens barrel, dbs is the inner diameter of the object side surface of the second lens barrel, dbm is the inner diameter of the image side surface of the second lens barrel, Dbs is the outer diameter of the object side surface of the second lens barrel, Dbm is the outer diameter of the image side surface of the second lens barrel, EP01 is the distance between the object side surface of the first lens barrel and the object side surface of the first spacer element along the optical axis, EP34 is the distance between the image side surface of the third spacer element and the object side surface of the fourth spacer element along the optical axis, CP4 is the maximum thickness of the fourth spacer element along the optical axis, EP45 is the distance between the image side surface of the fourth spacer element and the object side surface of the fifth spacer element along the optical axis, La is the maximum height of the first lens barrel, and Lb is the maximum height of the second lens barrel. ​​

[0169] Table 11

[0170]

[0171] In summary, the optical imaging systems in Embodiments 1-9 satisfy the relationship shown in Table 12, as shown in Table 12.

[0172] Table 12

[0173]

[0174] It is worth mentioning that according to an aspect of the present application, one embodiment of the present application further provides a camera module which can include the optical imaging system and a photosensitive element described above, and the photosensitive element is arranged on the image side of the optical imaging system for imaging. It can be understood that the photosensitive element mentioned in the present application can be implemented as a Charge Coupled Device (CCD) or a Complementary Metal Oxide Semiconductor (CMOS), but is not limited thereto, and the present application will not be repeated here.

[0175] In addition, according to another aspect of the present application, one embodiment of the present application further provides an electronic device which can include the camera module and a processor, and the camera module is communicatively connected to the processor for acquiring image data and inputting the image data to the processor for processing. It can be understood that the electronic device mentioned in the present application can be implemented as a device such as a mobile phone equipped with the camera module, but is not limited thereto, and the present application will not be repeated here.

[0176] The technical features of the above embodiments can be combined in any manner. In order to make the description concise, all possible combinations of the technical features in the above embodiments are not described, however, as long as the combinations of the technical features do not exist contradictions, they should be considered as the scope of the present application.

[0177] The above embodiments only express several embodiments of the present application, and the description is more specific and detailed, but it should not be understood as a limitation on the scope of the patent application. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are within the scope of the present application. Therefore, the scope of the patent protection of the present application should be subject to the appended claims.

Claims

1. An optical imaging system, characterized in that, Along the optical axis, from the object side to the image side, it sequentially includes a first lens tube and a second lens tube; wherein... The first lens barrel sequentially includes: a first lens with negative optical power, the object side of the first lens being concave; and a second lens with positive optical power, the object side of the second lens being convex. A first spacer element is provided between the first lens and the second lens, and the first spacer element abuts against the image side of the first lens; The second lens barrel sequentially includes: a third lens with negative optical power, wherein the object-side surface of the third lens is convex and the image-side surface of the third lens is concave; a fourth lens with positive optical power, wherein both the object-side and image-side surfaces of the fourth lens are convex; a fifth lens with positive optical power, wherein both the object-side and image-side surfaces of the fifth lens are convex and concave; and a sixth lens with negative optical power, wherein the image-side surface of the sixth lens is concave. A third spacer element is provided between the third lens and the fourth lens, and the third spacer element abuts against the image side of the third lens; A fourth spacer element is provided between the fourth lens and the fifth lens, and the fourth spacer element abuts against the image side of the fourth lens; A fifth spacer element is provided between the fifth lens and the sixth lens, and the fifth spacer element abuts against the image side of the fifth lens; An autofocus assembly is provided between the second lens and the third lens; The optical imaging system satisfies: 2.15 < (Dbs - dbs) / (Dam - dam) < 2.95, 0.07 ≤ (D1s - d1s) / f12 ≤ 0.58; where Dbs is the outer diameter of the object side of the second lens barrel, dbs is the inner diameter of the object side of the second lens barrel, Dam is the outer diameter of the image side of the first lens barrel, dam is the inner diameter of the image side of the first lens barrel, D1s is the outer diameter of the object side of the first spacer element, d1s is the inner diameter of the object side of the first spacer element, and f12 is the combined focal length of the first lens and the second lens.

2. The optical imaging system according to claim 1, characterized in that, The optical imaging system also satisfies: 1.25 < f3456 / Lb < 2.30, where f3456 is the combined focal length of the third lens, the fourth lens, the fifth lens and the sixth lens, and Lb is the maximum height of the second lens barrel.

3. The optical imaging system according to claim 1, characterized in that, The optical imaging system also satisfies: 0.90 < EP01 / T12 < 3.80, where EP01 is the distance from the side of the first lens barrel to the side of the first spacer element along the optical axis, and T12 is the air gap between the first lens and the second lens on the optical axis.

4. The optical imaging system according to claim 1, characterized in that, The optical imaging system also satisfies: -2.15≤f1 / La≤-1.56, where f1 is the effective focal length of the first lens and La is the maximum height of the first lens barrel.

5. The optical imaging system according to claim 1, characterized in that, The optical imaging system also satisfies: 1.50 < d1m / R3 < 2.85, where d1m is the inner diameter of the image side of the first spacer element and R3 is the radius of curvature of the object side of the second lens.

6. The optical imaging system according to claim 1, characterized in that, The optical imaging system also satisfies: 8.60 < f4 / (EP34+CP4) < 10.75, where f4 is the effective focal length of the fourth lens, EP34 is the distance along the optical axis from the image side of the third spacer to the object side of the fourth spacer, and CP4 is the maximum thickness of the fourth spacer along the optical axis.

7. The optical imaging system according to claim 1, characterized in that, The optical imaging system also satisfies: 2.25≤|f56| / (D5s+D5m)≤3.41, where f56 is the combined focal length of the fifth lens and the sixth lens, D5s is the outer diameter of the object side of the fifth spacer element, and D5m is the outer diameter of the image side of the fifth spacer element.

8. The optical imaging system according to claim 1, characterized in that, The optical imaging system also satisfies: 3.50≤(Das-das) / CT1≤6.36, where Das is the outer diameter of the side of the first lens barrel, das is the inner diameter of the side of the first lens barrel, and CT1 is the center thickness of the first lens on the optical axis.

9. The optical imaging system according to claim 1, characterized in that, The optical imaging system also satisfies: 2.15 < d4s / EP45 < 2.45, where d4s is the inner diameter of the side surface of the fourth spacer element, and EP45 is the distance along the optical axis from the image side surface of the fourth spacer element to the side surface of the fifth spacer element.

10. The optical imaging system according to claim 1, characterized in that, The optical imaging system also satisfies: -1.8 < f6 / (Dbm-dbm) < -1.4, where f6 is the effective focal length of the sixth lens, Dbm is the outer diameter of the image side of the second lens barrel, and dbm is the inner diameter of the image side of the second lens barrel.

11. The optical imaging system according to claim 1, characterized in that, The optical imaging system also satisfies: -3.50 < f3 / d3s < -2.40, where f3 is the effective focal length of the third lens and d3s is the inner diameter of the side surface of the third spacer element.

12. The optical imaging system according to claim 1, characterized in that, The optical imaging system also satisfies: 3.39 ≤ f5 / (d5m-d4m) ≤ 6.26, where f5 is the effective focal length of the fifth lens, d5m is the inner diameter of the image side of the fifth spacer element, and d4m is the inner diameter of the image side of the fourth spacer element.

13. The optical imaging system according to claim 1, characterized in that, The optical imaging system also satisfies: 5.10≤D4s / CT4≤7.87, where D4s is the outer diameter of the side of the fourth spacer element and CT4 is the center thickness of the fourth lens on the optical axis.

14. The optical imaging system according to claim 1, characterized in that, The optical imaging system also satisfies: 0.70mm < d5s × (R9 / R10) < 1.15mm, where d5s is the inner diameter of the object side of the fifth spacer element, R9 is the radius of curvature of the object side of the fifth lens, and R10 is the radius of curvature of the image side of the fifth lens.

Images