Optical imaging system and camera module comprising same

Abstract

The utility model discloses an optical imaging system and a camera module comprising the same. The optical image capturing system includes a lens barrel, and a lens group and a plurality of spacer elements accommodated therein, in which the lens group includes a first lens, a second lens, a third lens, a fourth lens and a fifth lens which are sequentially arranged from an object side to an image side along an optical axis. The plurality of spacer elements includes first, second, third, and fourth spacer elements located on image sides of the first, second, third, and fourth lenses, respectively, and bearing image side portions of the first, second, third, and fourth lenses, respectively. The maximum height L of the lens barrel, the effective focal length f of the optical imaging system, the distance EP23 from the second spacer element to the third spacer element on the optical axis, the maximum thickness CP3 of the third spacer element in the optical axis direction, the center thickness CT2 of the second lens on the optical axis, and the center thickness CT3 of the third lens on the optical axis satisfy the conditional expression 0.50 lt; l / flt; 0.75, 0.60 lt, 0.75, 0.60 lt; (EP2 < 3 + CP3 >) / CT2lt; 2.50 and 2.00 lt, 2.50 and 2.00 lt; (EP2 < 3 + CP3 >) / CT3lt; and 8.50.

Description

Technical Field

[0001] The present application relates to the field of optical elements, and more specifically, to an optical imaging system and a camera module including the optical imaging system. Background Art

[0002] In recent years, smart products such as smartphones and their related technologies have rapidly evolved and developed, and camera lenses, as an important component of smartphones and other products, have received widespread attention from consumers. Currently, most smartphones are equipped with ultra-wide-angle, wide-angle and telephoto camera lenses, combined with algorithms to cover the functions of photographic field angles from large to small and photographic distances from close to far. Among them, the telephoto camera lens is particularly important as the upper limit lens for limiting the zoom multiple.

[0003] Telephoto lenses have gradually become standard equipment for flagship models of various mobile phone manufacturers. At the same time, as high-end flagship phones pursue large image surfaces and full-focal-length lenses, the optical imaging lenses with a single telephoto characteristic on mobile phones at this stage are gradually being endowed with large image surface characteristics to ensure that the mobile phone has higher imaging quality in terms of telephoto, giving mobile phone users a better photo-taking experience.

[0004] Therefore, it is necessary to develop an optical imaging system design that has both long focal length and large image surface characteristics, which can be applied to rear lens groups of smartphones, etc. At the same time, through the adjustment and matching of lens surface shapes, and the optimization design of related lenses, lens barrels, spacer elements and other structures, the feasibility of molding of various components and the reliability of lenses can be taken into account, so as to solve the problem that it is difficult to take into account both long focal length and large image surface in optical imaging lenses in the prior art. Utility Model Content

[0005] The present application provides an optical imaging system, which may include a lens barrel and a lens group and a plurality of spacer elements accommodated in the lens barrel. Among them, the lens group includes a first lens, a second lens, a third lens, a fourth lens, and a fifth lens arranged in sequence from the object side to the image side along the optical axis; the plurality of spacer elements include: a first spacer element, located on the image side of the first lens and partially abutting against the image side surface of the first lens; a second spacer element, located on the image side of the second lens and partially abutting against the image side surface of the second lens; a third spacer element, located on the image side of the third lens and partially abutting against the image side surface of the third lens; a fourth spacer element, located on the image side of the fourth lens and partially abutting against the image side surface of the fourth lens. The optical imaging system satisfies: 0.50 < L / f < 0.75, 0.60 < (EP23 + CP3) / CT2 < 2.50, and 2.00 < (EP23 + CP3) / CT3 < 8.50, where L is the maximum height of the lens barrel, f is the effective focal length of the optical imaging system, EP23 is the distance on the optical axis from the second spacer element to the third spacer element, CP3 is the maximum thickness of the third spacer element along the optical axis direction, CT2 is the central thickness of the second lens on the optical axis, and CT3 is the central thickness of the third lens on the optical axis.

[0006] In one embodiment, the effective focal length f3 of the third lens, the distance EP23 on the optical axis from the second spacer element to the third spacer element, and the central thickness CT3 of the third lens on the optical axis satisfy: 3.50 < |f3| / (EP23 + CT3) < 4.93.

[0007] In one embodiment, the outer diameter D3m of the image side surface of the third spacer element, the inner diameter d3m of the image side surface of the third spacer element, and the effective focal length f3 of the third lens satisfy: -0.56 < (D3m - d3m) / f3 < -0.15.

[0008] In one embodiment, the inner diameter d4m of the image side surface of the fourth spacer element, the air gap T45 on the optical axis between the fourth lens and the fifth lens, the inner diameter d3m of the image side surface of the third spacer element, and the air gap T34 on the optical axis between the third lens and the fourth lens satisfy: 8.10 < d4m / T45 < 14.50 and 1.00 < d3m / T34 < 1.55.

[0009] In one embodiment, the distance EP12 from the first spacing element to the second spacing element on the optical axis, the sum of the distances ΣEP of any two adjacent spacing elements on the optical axis among all the spacing elements included in the optical imaging system, and the maximum height L of the lens barrel satisfy: 0.62 mm <EP12 / ∑EP×L<1.58mm。

[0010] In one embodiment, the effective focal length f4 of the fourth lens, the refractive index N4 of the fourth lens and the outer diameter D4m of the image side surface of the fourth spacing element satisfy: 1.60 <f4×N4 / D4m<15.17。

[0011] In one embodiment, a curvature radius R3 of the object side surface of the second lens, a curvature radius R4 of the image side surface of the second lens, and an inner diameter d2s of the object side surface of the second spacer element satisfy: 1.20<|R3+R4| / d2s<4.00.

[0012] In one embodiment, the curvature radius R9 of the object side surface of the fifth lens, the refractive index N5 of the fifth lens and the inner diameter d4s of the object side surface of the fourth spacer element satisfy: 0.38 <R9 / N5 / d4s<0.89。

[0013] In one embodiment, the plurality of spacer elements further include: a third auxiliary spacer element, which is located on the image side of the third spacer element and at least partially bears against the image side surface of the third spacer element; the maximum thickness CP3b of the third auxiliary spacer element along the optical axis, the distance EP34 from the third spacer element to the fourth spacer element on the optical axis, the center thickness CT4 of the fourth lens on the optical axis, and the center thickness CT3 of the third lens on the optical axis satisfy: 0.00 <CP3b / (EP34+CT3+CT4)<0.61。

[0014] In one embodiment, an inner diameter d3s of the object side surface of the third spacer element, an inner diameter d4s of the object side surface of the fourth spacer element, an air gap T34 between the third lens and the fourth lens on the optical axis, and an air gap T45 between the fourth lens and the fifth lens on the optical axis satisfy: 2.00<(d3s+d4s) / (T34+T45)<2.65.

[0015] In one embodiment, the center thickness CT3 of the third lens on the optical axis, the center thickness CT4 of the fourth lens on the optical axis, and the distance EP34 from the third spacer element to the fourth spacer element on the optical axis satisfy: 0.30<(CT3+CT4) / EP34<1.20.

[0016] In one embodiment, the distance EP01 from the object side end face of the lens barrel to the object side face of the first spacer element on the optical axis, the maximum thickness CP1 of the first spacer element along the optical axis, the outer diameter D1s of the object side face of the first spacer element, and the inner diameter d1s of the object side face of the first spacer element satisfy: 0.79<(EP01+CP1) / (D1s-d1s)<1.15.

[0017] In one embodiment, the curvature radius R4 of the image side surface of the second lens, the outer diameter D2m of the image side surface of the second spacing element, and the inner diameter d2m of the image side surface of the second spacing element satisfy: -13.30 <R4 / (D2m-d2m)<-3.50。

[0018] In one embodiment, the maximum height L of the lens barrel, the sum ∑AT of the air gaps between any two adjacent lenses with optical power in the optical imaging system on the optical axis, and the sum ∑CP of the maximum thicknesses of each spacing element in the optical imaging system along the optical axis satisfy: 1.35<(L-∑AT) / ∑CP<2.90.

[0019] In one embodiment, the lens barrel includes an object side boss structure and an image side boss structure, and the object side boss structure and the image side boss structure protrude outward from the outer circumferential surface of the lens barrel at the object side end and the image side end of the lens barrel respectively, and the object side boss structure and the image side boss structure form a groove with the outer circumferential surface of the lens barrel located therebetween, and the groove is used to assemble the module connector.

[0020] On the other hand, the present application also provides a camera module, which includes an optical imaging system provided according to any of the above embodiments, and a module driver for driving the optical imaging system.

[0021] An optical imaging system according to an embodiment of the present application includes a lens barrel, a five-piece lens group, and a plurality of spacer elements accommodated in the lens barrel. The first lens to the fifth lens are arranged in sequence from the object side to the image side along the optical axis. The first spacer element is located on the image side of the first lens and partially abuts against the image side surface of the first lens; the second spacer element is located on the image side of the second lens and partially abuts against the image side surface of the second lens; the third spacer element is located on the image side of the third lens and partially abuts against the image side surface of the third lens; the fourth spacer element is located on the image side of the fourth lens and partially abuts against the image side surface of the fourth lens. By such an arrangement of the optical imaging system, and by controlling that the maximum height L of the lens barrel and the effective focal length f of the optical imaging system satisfy the conditional formula 0.50 < L / f < 0.75, it can be ensured that the axial dimension of the lens barrel covers each lens of the optical system as much as possible; at the same time, by controlling that the distance EP23 between the second spacer element and the third spacer element on the optical axis, the maximum thickness CP3 of the third spacer element in the optical axis direction, the central thickness CT2 of the second lens on the optical axis, and the central thickness CT3 of the third lens on the optical axis satisfy the conditional formulas 0.60 < (EP23 + CP3) / CT2 < 2.50 and 2.00 < (EP23 + CP3) / CT3 < 8.50, the overall thickness uniformity of the second lens and the third lens can be guaranteed, and the stress concentration caused by uneven lens thickness during the molding process can be avoided, so as to prevent stress from concentrating on the second lens and the third lens, causing the surface shape of the second lens and the third lens to change, and further affecting defocus and the overall performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] With reference to the accompanying drawings, through the following detailed description of non-limiting embodiments, other features, objects, and advantages of the present application will become more apparent. In the drawings:

[0023] Figure 1 The structure and related parameter schematic diagrams of an optical imaging system according to an exemplary embodiment of the present application are shown;

[0024] Figure 2 The structural schematic diagram of the optical imaging system according to Embodiment 1 of the present application is shown;

[0025] Figure 3 The structural schematic diagram of the optical imaging system according to Embodiment 2 of the present application is shown;

[0026] Figure 4 The structural schematic diagram of the optical imaging system according to Embodiment 3 of the present application is shown;

[0027] Figures 5 to 7 The astigmatism curves, distortion curves, and axial chromatic aberration curves of the optical imaging systems according to Embodiment 1, Embodiment 2, and Embodiment 3 of the present application are respectively shown;

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

[0029] Fig. 9 A schematic structural diagram of an optical imaging system according to Embodiment 5 of the present application is shown;

[0030] Fig.10 A schematic structural diagram of an optical imaging system according to Embodiment 6 of the present application is shown;

[0031] Figures 11 to 13 The astigmatism curve, distortion curve and axial chromatic aberration curve of the optical imaging system according to Embodiment 4, Embodiment 5 and Embodiment 6 of the present application are respectively shown;

[0032] Fig.14 A schematic structural diagram of an optical imaging system according to Embodiment 7 of the present application is shown;

[0033] Fig.15 A schematic structural diagram of an optical imaging system according to Embodiment 8 of the present application is shown;

[0034] Fig.16 A schematic structural diagram of an optical imaging system according to Embodiment 9 of the present application is shown;

[0035] Figures 17 to 19 The astigmatism curve, distortion curve and axial chromatic aberration curve of the optical imaging system according to Embodiment 7, Embodiment 8 and Embodiment 9 of the present application are respectively shown;

[0036] Fig. 20 The MTF simulation curve of the optical imaging system according to the exemplary embodiment of the present application is shown when the optical imaging system satisfies the conditional formulas (EP23+CP3) / CT2=1.37 and (EP23+CP3) / CT3=3.50;

[0037] Fig.21 The MTF simulation curve of the optical imaging system according to the exemplary embodiment of the present application is shown when the optical imaging system satisfies the conditional formulas (EP23+CP3) / CT2=1.64 and (EP23+CP3) / CT3=6.89;

[0038] Fig. 22 shows an MTF simulation curve of the optical imaging system according to an exemplary embodiment of the present application when the optical imaging system satisfies the conditional formulas (EP23+CP3) / CT2=0.25 and (EP23+CP3) / CT3=1.02; and

[0039] Fig.23The MTF simulation curve of the optical imaging system according to the exemplary embodiment of the present application is shown when the optical imaging system satisfies the conditional formulas (EP23+CP3) / CT2=3.15 and (EP23+CP3) / CT3=9.96. DETAILED DESCRIPTION

[0040] In order to better understand the present application, a more detailed description will be made of various aspects of the present application with reference to the accompanying drawings. It should be understood that these detailed descriptions are only descriptions of exemplary embodiments of the present application, and are not intended to limit the scope of the present application in any way. Throughout the specification, the same reference numerals refer to the same elements. The expression "and / or" includes any and all combinations of one or more of the associated listed items.

[0041] It should be noted that in this specification, the expressions of first, second, third, etc. are only used to distinguish one feature from another feature, and do not represent any limitation on the features. Therefore, without departing from the teaching of the present application, the first lens discussed below may also be referred to as the second lens or the third lens.

[0042] In the drawings, the thickness, size and shape of the lenses have been slightly exaggerated for ease of explanation. Specifically, the shapes of the spherical or aspherical surfaces shown in the drawings are shown by way of example. That is, the shapes of the spherical or aspherical surfaces are not limited to the shapes of the spherical or aspherical surfaces shown in the drawings. The drawings are only examples and are not drawn strictly to scale.

[0043] In this article, the paraxial area refers to the area near the optical axis. If the lens surface is convex and the position of the convex surface is not defined, it means that the lens surface is convex at least in the paraxial area; if the lens surface is concave and the position of the concave surface is not defined, it means that the lens surface is concave at least in the paraxial area. The judgment of the surface type in the paraxial area can be judged according to the general method in this field, for example, the positive and negative R value (R refers to the radius of curvature of the paraxial area) is used to judge the concave and convex. In this article, the surface of each lens closest to the subject is called the object side of the lens, and the surface of each lens closest to the imaging surface is called the image side of the lens. For the object side, when the R value is positive, it is judged as a convex surface, and when the R value is negative, it is judged as a concave surface; for the image side, when the R value is positive, it is judged as a concave surface, and when the R value is negative, it is judged as a convex surface.

[0044] It should also be understood that the terms "comprises", "including", "having", "includes" and / or "comprising", when used in this specification, indicate the presence of the stated features, elements and / or components, but do not exclude the presence or addition of one or more other features, elements, components and / or combinations thereof. In addition, when expressions such as "at least one of..." appear after a list of listed features, they modify the entire listed features rather than modifying the individual elements in the list. In addition, when describing embodiments of the present application, "may" is used to mean "one or more embodiments of the present application". And, the term "exemplary" is intended to refer to an example or illustration.

[0045] Unless otherwise defined, all terms (including technical terms and scientific terms) used in this article have the same meaning as commonly understood by ordinary technicians in the field to which this application belongs. It should also be understood that terms (such as terms defined in commonly used dictionaries) should be interpreted as having the same meaning as their meaning in the context of the relevant technology, and will not be interpreted in an idealized or overly formal sense unless explicitly defined in this article.

[0046] It should be noted that, in the absence of conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The following embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for those of ordinary skill in the art, several variations and improvements can also be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. The present application will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

[0047] The features, principles and other aspects of the present application are described in detail below.

[0048] The optical imaging system according to an exemplary embodiment of the present application may include a lens barrel and a lens group and a plurality of spacer elements contained in the lens barrel. The lens group may be a five-piece lens group, including a first lens, a second lens, a third lens, a fourth lens and a fifth lens arranged in sequence from the object side to the image side along the optical axis.

[0049] In an exemplary embodiment, the plurality of spacing elements of the optical imaging system may include: a first spacing element located on the image side of the first lens and partially bearing against the image side surface of the first lens; a second spacing element located on the image side of the second lens and partially bearing against the image side surface of the second lens; a third spacing element located on the image side of the third lens and partially bearing against the image side surface of the third lens; and a fourth spacing element located on the image side of the fourth lens and partially bearing against the image side surface of the fourth lens.

[0050] In an exemplary embodiment, the optical imaging system of the present application may satisfy the conditional formula 0.50 < L / f < 0.75, where L is the maximum height of the lens barrel in the direction along or parallel to the optical axis, and f is the effective focal length of the optical imaging system.

[0051] In an exemplary embodiment, the optical imaging system of the present application may satisfy the conditional formulas 0.60 < (EP23 + CP3) / CT2 < 2.50 and 2.00 < (EP23 + CP3) / CT3 < 8.50, where EP23 is the distance between the second spacer element and the third spacer element on the optical axis (i.e., the distance on the optical axis from the image side surface of the second spacer element to the object side surface of the third spacer element), CP3 is the maximum thickness of the third spacer element in the direction along the optical axis, CT2 is the central thickness of the second lens on the optical axis, and CT3 is the central thickness of the third lens on the optical axis.

[0052] The optical imaging system according to an embodiment of the present application includes a lens barrel and a five - lens group and a plurality of spacer elements accommodated in the lens barrel. The first lens, the second lens, the third lens, the fourth lens, and the fifth lens are arranged in sequence from the object side to the image side along the optical axis. The first spacer element is located on the image side of the first lens and partially abuts against the image side surface of the first lens; the second spacer element is located on the image side of the second lens and partially abuts against the image side surface of the second lens; the third spacer element is located on the image side of the third lens and partially abuts against the image side surface of the third lens; the fourth spacer element is located on the image side of the fourth lens and partially abuts against the image side surface of the fourth lens. Through this arrangement of the optical imaging system, and by controlling the maximum height L of the lens barrel and the effective focal length f of the optical imaging system to satisfy the conditional formula 0.50 < L / f < 0.75, it can be ensured that the axial dimension of the lens barrel covers as many lenses of the optical system as possible; at the same time, by controlling the distance EP23 between the second spacer element and the third spacer element on the optical axis, the maximum thickness CP3 of the third spacer element in the direction along the optical axis, the central thickness CT2 of the second lens on the optical axis, and the central thickness CT3 of the third lens on the optical axis to satisfy the conditional formulas 0.60 < (EP23 + CP3) / CT2 < 2.50 and 2.00 < (EP23 + CP3) / CT3 < 8.50, the overall thickness uniformity of the second lens and the third lens can be guaranteed, and the stress concentration caused by uneven thickness of the lenses during the molding process can be avoided, so as to prevent stress from concentrating on the second lens and the third lens, causing the surface shape of the second lens and the third lens to change, and further affecting defocus and the overall performance.

[0053] See the appendix Figures 20 to 23, the optical imaging system according to the present application is designed based on a five-lens configuration. At least one spacer element is provided between every two adjacent lenses. By defining that the system satisfies the condition 0.50 < L / f < 0.75, it is ensured that the axial dimension of the lens barrel covers all the lenses of the optical system as much as possible. When the distance EP23 between the second spacer element and the third spacer element on the optical axis, the maximum thickness CP3 of the third spacer element along the optical axis direction, the central thickness CT2 of the second lens on the optical axis, and the central thickness CT3 of the third lens on the optical axis satisfy the conditions (EP23 + CP3) / CT2 = 1.37 and (EP23 + CP3) / CT3 = 3.50, the MTF simulation curve of the optical imaging system of Example 1 (such as Example 1 described later) is as shown in Fig. 20 ; when EP23, CP3, CT2, and CT3 satisfy the conditions (EP23 + CP3) / CT2 = 1.64 and (EP23 + CP3) / CT3 = 6.89, the MTF simulation curve of the optical imaging system of Example 2 (such as Example 3 described later) is as shown in Fig.21 ; when EP23, CP3, CT2, and CT3 satisfy the conditions (EP23 + CP3) / CT2 = 0.25 and (EP23 + CP3) / CT3 = 1.02, the MTF simulation curve of the optical imaging system according to the exemplary embodiment is as shown in Fig. 22 ; when EP23, CP3, CT2, and CT3 satisfy the conditions (EP23 + CP3) / CT2 = 3.15 and (EP23 + CP3) / CT3 = 9.96, the MTF simulation curve of the optical imaging system according to the exemplary embodiment is as shown in Fig.23 . Comparing Fig. 20 , Fig.21 , Fig. 22 and Fig.23 shows that by controlling EP23, CP3, CT2, and CT3 to satisfy the conditions 0.60 < (EP23 + CP3) / CT2 < 2.50 and 2.00 < (EP23 + CP3) / CT3 < 8.50, the optical imaging system according to the present application can effectively avoid stress concentration on the lenses, ensure good force conditions for the second and third lenses of the system, reduce the change in the surface shape of the second and third lenses due to stress, and is beneficial to the improvement of the system performance.

[0054] In the exemplary embodiment, the first lens may have a positive optical power; the second lens may have a positive optical power; the third lens may have a negative optical power; the fourth lens may have a positive optical power; the fifth lens may have a negative optical power.

[0055] In an exemplary embodiment, the object side surface of the first lens may be convex, and the image side surface may be concave. The object side surface of the second lens may be convex, and the image side surface may be convex. The object side surface of the third lens may be convex, and the image side surface may be concave. The object side surface of the fourth lens may be concave, and the image side surface may be convex. The object side surface of the fifth lens may be convex, and the image side surface may be concave.

[0056] In an exemplary embodiment, the plurality of spacer elements of the optical imaging system may further include: a second auxiliary spacer element located at the image side of the second spacer element and at least partially in contact with the image side surface of the second spacer element.

[0057] In an exemplary embodiment, the plurality of spacer elements of the optical imaging system may further include: a third auxiliary spacer element located at the image side of the third spacer element and at least partially in contact with the image side surface of the third spacer element.

[0058] In an exemplary embodiment, the plurality of spacer elements of the optical imaging system may further include: a third auxiliary spacer element located on the image side of the third auxiliary spacer element and at least partially in contact with the image side surface of the third auxiliary spacer element.

[0059] In an exemplary embodiment, the plurality of spacer elements of the optical imaging system may further include: a fourth auxiliary spacer element located at the image side of the fourth spacer element and at least partially in contact with the image side surface of the fourth spacer element.

[0060] In an exemplary embodiment, the optical imaging system of the present application may satisfy the conditional formula 3.50<|f3| / (EP23+CT3)<4.93, wherein f3 is the effective focal length of the third lens, EP23 is the distance from the second spacer element to the third spacer element on the optical axis, and CT3 is the center thickness of the third lens on the optical axis. By controlling the effective focal length of the third lens, the distance from the second spacer element to the third spacer element on the optical axis, and the center thickness of the third lens to satisfy the conditional formula 3.50<|f3| / (EP23+CT3)<4.93, under the condition of a certain effective focal length, ensuring that the sum of the center thickness and the edge thickness of the third lens is within a reasonable range is conducive to the molding of the third lens, avoiding the third lens being too thin to be filled, and at the same time making the third lens have better strength, and the deformation during the assembly process is as small as possible, thereby ensuring the performance of the lens.

[0061] In an exemplary embodiment, the optical imaging system of the present application can satisfy the conditional formula -0.56 < (D3m - d3m) / f3 < -0.15, where D3m is the outer diameter of the image side of the third spacer element, d3m is the inner diameter of the image side of the third spacer element, and f3 is the effective focal length of the third lens. By controlling the ratio of the difference between the outer diameter and the inner diameter of the image side of the third spacer element to the effective focal length of the third lens within this range, with a certain overall focal length size, the third spacer element can effectively ensure vignetting of the lens and ensure the convergence of light in the field of view near the center of the lens. At the same time, the third spacer element can effectively intercept excess light to avoid stray light formed by light passing through the edge mechanism part of the lens due to too small a difference between the inner and outer diameters, which affects the overall imaging effect.

[0062] In an exemplary embodiment, the optical imaging system of the present application can satisfy the conditional formulas 8.10 < d4m / T45 < 14.50 and 1.00 < d3m / T34 < 1.55, where d4m is the inner diameter of the image side of the fourth spacer element, T45 is the air gap on the optical axis between the fourth lens and the fifth lens, d3m is the inner diameter of the image side of the third spacer element, and T34 is the air gap on the optical axis between the third lens and the fourth lens. Reasonably restricting the ratio of the inner diameter of the image side of the fourth spacer element to the air gap on the optical axis between the fourth lens and the fifth lens, and the ratio of the inner diameter of the image side of the third spacer element to the air gap on the optical axis between the third lens and the fourth lens, can effectively regulate the light-blocking height of the two air gaps respectively, which is beneficial to both the convergence of light and the interception of excess light to avoid stray light formed by reflection through the third auxiliary spacer element and the fourth auxiliary spacer element, ensuring the imaging level of the lens.

[0063] In an exemplary embodiment, the optical imaging system of the present application can satisfy the conditional formula 0.62 mm < EP12 / ∑EP × L < 1.58 mm, where EP12 is the distance on the optical axis from the first spacer element to the second spacer element (i.e., the distance on the optical axis from the image side of the first spacer element to the object side of the second spacer element), ∑EP is the sum of the distances on the optical axis between any two adjacent spacer elements included in the optical imaging system, and L is the maximum height of the lens barrel in the direction along or parallel to the optical axis. Reasonably restricting the ratio of the distance on the optical axis from the first spacer element to the second spacer element to the sum of the distances on the optical axis between any two adjacent spacer elements included in all spacer elements is beneficial to restricting the proportion of the edge thickness of the second lens in the total edge distance sum of all lenses in the entire system, enabling better spatial distribution of the second lens and avoiding problems with forming appearance due to too small an edge thickness of the second lens being difficult to form or too large a thickness resulting in a disproportionate ratio.

[0064] In an exemplary embodiment, the optical imaging system of the present application can satisfy the conditional formula 1.60 < f4 × N4 / D4m < 15.17, where f4 is the effective focal length of the fourth lens, N4 is the refractive index of the fourth lens, and D4m is the outer diameter of the image side surface of the fourth spacer element. Reasonably controlling the relationship among the effective focal length of the fourth lens, the refractive index of the fourth lens, and the outer diameter of the image side surface of the fourth spacer element to satisfy the conditional formula 1.60 < f4 × N4 / D4m < 15.17 is beneficial to restricting the outer diameter of the fourth spacer element from being too large, avoiding affecting the overall external dimensions and barrel thickness, enabling the fourth spacer element to be assembled in the barrel, and providing sufficient space for the outer diameter dimension of the barrel to adapt to the motor under the condition of meeting the forming requirements.

[0065] In an exemplary embodiment, the optical imaging system of the present application can satisfy the conditional formula 1.20 < |R3 + R4| / d2s < 4.00, where R3 is the curvature radius of the object side surface of the second lens, R4 is the curvature radius of the image side surface of the second lens, and d2s is the inner diameter of the object side surface of the second spacer element. Reasonably controlling the relationship among the curvature radius of the object side surface of the second lens, the curvature radius of the image side surface of the second lens, and the inner diameter of the object side surface of the second spacer element to satisfy the conditional formula 1.20 < |R3 + R4| / d2s < 4.00 is beneficial to restricting the convergence and divergence of light rays at the two aspherical surfaces and the vignetting of marginal rays at the second lens, ensuring the imaging resolution of the overall lens; at the same time, an appropriate inner diameter of the object side surface of the second spacer element can intercept excessive light rays from entering the bearing surface of the third lens mechanism to form stray light.

[0066] In an exemplary embodiment, the optical imaging system of the present application can satisfy the conditional formula 0.38 < R9 / N5 / d4s < 0.89, where R9 is the curvature radius of the object side surface of the fifth lens, N5 is the refractive index of the fifth lens, and d4s is the inner diameter of the object side surface of the fourth spacer element. Reasonably controlling the ratio relationship among the curvature radius of the object side surface of the fifth lens, the refractive index of the fifth lens, and the inner diameter of the object side surface of the fourth spacer element can ensure the illuminance and performance of the marginal field of view of the optical system, avoid the problem of vignetting in the marginal field of view caused by excessive light blocking by the fourth spacer element, and also avoid the non-convergence of light rays in the marginal field of view, which affects the imaging resolution.

[0067] In an exemplary embodiment, the plurality of spacer elements of the optical imaging system further includes a third auxiliary spacer element, which is located on the image side of the third spacer element and at least partially abuts against the image side surface of the third spacer element; and the optical imaging system of the present application can satisfy the conditional formula 0.00 < CP3b / (EP34 + CT3 + CT4) < 0.61, where CP3b is the maximum thickness of the third auxiliary spacer element in the optical axis direction, EP34 is the distance between the third spacer element and the fourth spacer element on the optical axis (i.e., the distance between the image side surface of the third spacer element and the object side surface of the fourth spacer element on the optical axis), CT3 is the central thickness of the third lens on the optical axis, and CT4 is the central thickness of the fourth lens on the optical axis. Reasonably restricting the ratio of the maximum thickness of the third auxiliary spacer element in the optical axis direction to the sum of the distance between the third spacer element and the fourth spacer element on the optical axis, the central thickness of the third lens, and the central thickness of the fourth lens is beneficial to ensuring better connection when the gap between the third lens and the fourth lens is too large, and at the same time ensuring the forming feasibility of the third auxiliary spacer element.

[0068] In an exemplary embodiment, the optical imaging system of the present application can satisfy the conditional formula 2.00 < (d3s + d4s) / (T34 + T45) < 2.65, where 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, T34 is the air gap between the third lens and the fourth lens on the optical axis, and T45 is the air gap between the fourth lens and the fifth lens on the optical axis. By controlling the inner diameters of the object side surfaces of the third spacer element and the fourth spacer element, the air gap between the third lens and the fourth lens on the optical axis, and the air gap between the fourth lens and the fifth lens on the optical axis to satisfy the conditional formula 2.00 < (d3s + d4s) / (T34 + T45) < 2.65, it is beneficial to balance the performance and field curvature of the central field of view and the marginal field of view of the optical system. At the same time, the inner diameters of the object side surfaces of the third spacer element and the fourth spacer element can intercept excess light and reflect it onto the inner wall of the third auxiliary spacer element, affecting the imaging quality.

[0069] In an exemplary embodiment, the optical imaging system of the present application can satisfy the conditional formula 0.30 < (CT3 + CT4) / EP34 < 1.20, where CT3 is the central thickness of the third lens on the optical axis, CT4 is the central thickness of the fourth lens on the optical axis, and EP34 is the distance between the third spacer element and the fourth spacer element on the optical axis. Reasonably controlling the ratio of the sum of the central thicknesses of the third lens and the fourth lens to the distance between the third spacer element and the fourth spacer element on the optical axis is beneficial to controlling the axial spacing and spatial distribution between the third lens and the fourth lens, ensuring that the central thicknesses of the third lens and the fourth lens meet the minimum forming dimensions and at the same time ensuring the processing feasibility of the intermediate spacer element and the auxiliary spacer element.

[0070] In an exemplary embodiment, the optical imaging system of the present application can satisfy the conditional expression 0.79 < (EP01 + CP1) / (D1s - d1s) < 1.15, where EP01 is the distance on the optical axis from the object-side end face of the lens barrel to the object-side surface of the first spacer element, CP1 is the maximum thickness of the first spacer element along the optical axis direction, D1s is the outer diameter of the object-side surface of the first spacer element, and d1s is the inner diameter of the object-side surface of the first spacer element. By controlling the distance on the optical axis from the object-side end face of the lens barrel to the object-side surface of the first spacer element, the maximum thickness of the first spacer element along the optical axis direction, the outer diameter of the object-side surface of the first spacer element, and the inner diameter of the object-side surface of the first spacer element to satisfy the conditional expression 0.79 < (EP01 + CP1) / (D1s - d1s) < 1.15, it is possible to make the space at the front end face (object-side end face) of the lens barrel sufficient and ensure the processability of the first spacer element. The sufficient space at the front end face of the lens barrel, on the one hand, can provide enough glue space for dispensing and fixing when the lens is set with an inverted structure, and on the other hand, when the lens is set with a direct structure, it can make the thickness of the front end face of the lens barrel meet the requirements of molding filling and strength.

[0071] In an exemplary embodiment, the optical imaging system of the present application can satisfy the conditional expression -13.30 < R4 / (D2m - d2m) < -3.50, where R4 is the radius of curvature of the image-side surface of the second lens, D2m is the outer diameter of the image-side surface of the second spacer element, and d2m is the inner diameter of the image-side surface of the second spacer element. Reasonably controlling the ratio of the radius of curvature of the image-side surface of the second lens to the difference between the outer diameter and the inner diameter of the image-side surface of the second spacer element is beneficial to adjusting the light angle passing through the second lens. At the same time, under the condition that the outer diameter of the lens is determined, it is possible to well control the inner diameter and the outer diameter of the second spacer element. On the one hand, it can ensure a good spacer element bandwidth and the manufacturability of the spacer element, and on the other hand, it can make the inner diameter of the second spacer element block as much redundant light as possible without affecting the main value parameters, ensuring that the stray light of the lens is in a good state.

[0072] In an exemplary embodiment, the optical imaging system of the present application may satisfy the conditional formula 1.35<(L-∑AT) / ∑CP<2.90, wherein L is the maximum height of the lens barrel along the optical axis or parallel to the optical axis, ∑AT is the sum of the air gaps between any two adjacent lenses with optical power in the optical imaging system on the optical axis, and ∑CP is the sum of the maximum thicknesses of the individual spacing elements in the optical imaging system along the optical axis. By controlling the maximum height of the lens barrel along the optical axis or parallel to the optical axis, the sum of the air gaps between any two adjacent lenses with optical power in the optical imaging system on the optical axis, and the sum of the maximum thicknesses of the individual spacing elements in the optical imaging system along the optical axis to satisfy the conditional formula 1.35<(L-∑AT) / ∑CP<2.90, it is beneficial to control the ratio of the axial center thickness of the lens of the overall optical imaging system to the thickness of all spacing elements, and avoid the problem of the spacing elements being unable to be processed due to excessive step differences.

[0073] In an exemplary embodiment, the lens barrel may include an object side boss structure and an image side boss structure, which may protrude outward from the outer circumference of the lens barrel at the object side end and the image side end of the lens barrel, respectively, and the object side boss structure and the image side boss structure and the outer circumference of the lens barrel located therebetween may form a groove, which may be used to assemble the module connector. Figure 2 , where what is indicated by reference numeral STR1 may be, for example, an object side boss structure of the lens barrel P0, what is indicated by reference numeral STR2 may be, for example, an image side boss structure of the lens barrel P0, and what is indicated by reference numeral SUR1 may be, for example, an outer peripheral surface of the lens barrel P0 located between the object side boss structure and the image side boss structure; the object side boss structure STR1 of the lens barrel P0, the image side boss structure STR2 and the outer peripheral surface SUR1 therebetween may form a structure as shown in FIG. Figure 2 The groove structure shown in the figure, the module connector (not shown in the figure) can be assembled in the groove.

[0074] In an exemplary embodiment, the optical imaging system of the present application may include at least one aperture. The aperture may constrain the optical path and control the light intensity. The aperture may be set at an appropriate position of the optical imaging system, for example, the aperture may be set between the object side and the first lens.

[0075] In an exemplary embodiment, optionally, the optical imaging system may further include a filter for correcting color deviation and / or a protective glass for protecting a photosensitive element located on the imaging surface.

[0076] In an exemplary embodiment, one or more aspherical surfaces may be provided on the surfaces of the first lens, the second lens, the third lens, the fourth lens, and the fifth lens. The aspherical surface has better curvature radius characteristics and has the advantages of improving distortion aberration and astigmatism aberration. By using the aspherical surface, it is possible to eliminate the aberration that occurs during imaging as much as possible, thereby improving the imaging quality.

[0077] On the one hand, an optical imaging system according to an embodiment of the present application includes a lens barrel and a five-piece lens group and a plurality of spacer elements accommodated in the lens barrel. The first lens, the second lens, the third lens, the fourth lens, and the fifth lens are arranged in sequence from the object side to the image side along the optical axis. The first spacer element is located on the image side of the first lens and partially abuts against the image side surface of the first lens; the second spacer element is located on the image side of the second lens and partially abuts against the image side surface of the second lens; the third spacer element is located on the image side of the third lens and partially abuts against the image side surface of the third lens; the fourth spacer element is located on the image side of the fourth lens and partially abuts against the image side surface of the fourth lens. By such an arrangement of the optical imaging system, and by controlling that the maximum height L of the lens barrel and the effective focal length f of the optical imaging system satisfy the conditional formula 0.50 < L / f < 0.75, it is possible to ensure that the axial dimension of the lens barrel covers as much as possible each lens of the optical system; at the same time, by controlling the distance EP23 between the second spacer element and the third spacer element on the optical axis, the maximum thickness CP3 of the third spacer element in the optical axis direction, the central thickness CT2 of the second lens on the optical axis, and the central thickness CT3 of the third lens on the optical axis to satisfy the conditional formulas 0.60 < (EP23 + CP3) / CT2 < 2.50 and 2.00 < (EP23 + CP3) / CT3 < 8.50, it is possible to ensure the overall thickness uniformity of the second lens and the third lens, and to avoid uneven stress concentration due to uneven thickness of the lenses during the molding process, resulting in stress concentration on the second lens and the third lens, causing the surface shape of the second lens and the third lens to change, and further affecting defocus and the overall performance.

[0078] On the other hand, the optical imaging system according to an embodiment of the present application includes a lens barrel and a five-piece lens group and a plurality of spacer elements accommodated in the lens barrel. The first lens, the second lens, the third lens, the fourth lens, and the fifth lens are arranged in sequence from the object side to the image side along the optical axis. The first spacer element is located on the image side of the first lens and partially abuts against the image side surface of the first lens; the second spacer element is located on the image side of the second lens and partially abuts against the image side surface of the second lens; the third spacer element is located on the image side of the third lens and partially abuts against the image side surface of the third lens; the fourth spacer element is located on the image side of the fourth lens and partially abuts against the image side surface of the fourth lens. Through this setting of the optical imaging system, and by controlling the inner diameter d4m of the image side surface of the fourth spacer element and the air gap T45 between the fourth lens and the fifth lens on the optical axis to satisfy the conditional formula 8.10 < d4m / T45 < 14.50, and at the same time controlling the inner diameter d3m of the image side surface of the third spacer element and the air gap T34 between the third lens and the fourth lens on the optical axis to satisfy the conditional formula 1.00 < d3m / T34 < 1.55, the light blocking height of the two air gaps can be effectively regulated respectively, which is beneficial to the convergence of light and is also beneficial to intercepting the stray light formed by the reflection of the excess light passing through the third auxiliary spacer element and the fourth auxiliary spacer element, ensuring the imaging level of the lens.

[0079] On the other hand, the optical imaging system according to an embodiment of the present application includes a lens barrel and a five-piece lens group and a plurality of spacer elements accommodated in the lens barrel. The first lens, the second lens, the third lens, the fourth lens, and the fifth lens are arranged in sequence from the object side to the image side along the optical axis. The first spacer element is located on the image side of the first lens and partially abuts against the image side surface of the first lens; the second spacer element is located on the image side of the second lens and partially abuts against the image side surface of the second lens; the third spacer element is located on the image side of the third lens and partially abuts against the image side surface of the third lens; the fourth spacer element is located on the image side of the fourth lens and partially abuts against the image side surface of the fourth lens. Through this setting of the optical imaging system, and by controlling the distance EP12 between the first spacer element and the second spacer element on the optical axis, the sum ∑EP of the distances between any two adjacent spacer elements among all the spacer elements included in the optical imaging system on the optical axis, and the maximum height L of the lens barrel in the direction along or parallel to the optical axis to satisfy the conditional formula 0.62 mm < EP12 / ∑EP × L < 1.58 mm, it is beneficial to limit the proportion of the edge thickness of the second lens in the total edge distance sum of all the lenses in the system, enabling the second lens to have a better space distribution and avoiding the problem that the edge thickness of the second lens is too small to be formed or too thick resulting in a disproportionate molding appearance problem.

[0080] In another aspect, an optical imaging system according to an embodiment of the present application includes a lens barrel and a five-lens group and a plurality of spacer elements accommodated in the lens barrel. The first lens, the second lens, the third lens, the fourth lens, and the fifth lens are arranged in sequence along the optical axis from the object side to the image side. The first spacer element is located on the image side of the first lens and partially abuts against the image side surface of the first lens; the second spacer element is located on the image side of the second lens and partially abuts against the image side surface of the second lens; the third spacer element is located on the image side of the third lens and partially abuts against the image side surface of the third lens; the fourth spacer element is located on the image side of the fourth lens and partially abuts against the image side surface of the fourth lens. By such an arrangement of the optical imaging system, and by controlling the radius of curvature R9 of the object side surface of the fifth lens, the refractive index N5 of the fifth lens, and the inner diameter d4s of the object side surface of the fourth spacer element to satisfy the conditional expression 0.38 < R9 / N5 / d4s < 0.89, it is possible to ensure the illuminance and performance of the edge field of view of the optical system, avoid the problem of vignetting in the edge field of view due to excessive light blocking by the fourth spacer element, and also avoid the non-convergence of the light in the edge field of view, which affects the imaging resolution.

[0081] However, those skilled in the art should understand that without departing from the technical solutions claimed in the present application, the number of lenses constituting the optical imaging system can be changed, and the number of spacer elements can also be changed to obtain the various results and advantages described in this specification. The present application does not make specific limitations in this regard. For example, although five lenses are described as an example in the embodiment, the optical imaging system is not limited to including five lenses. If necessary, the optical imaging system may further include other numbers of lenses. Again, for example, according to needs, the optical imaging system may also include other numbers of spacer elements different from those described in the above embodiment.

[0082] The present application also provides an imaging module, which may include the optical imaging system according to the embodiment of the present application, and may further include a module driving member, and the module driving member can be used to drive the optical imaging system, for example.

[0083] In an exemplary embodiment, the module driving member may include a motor, for example, which can drive the optical imaging system to change its position or orientation within a certain range, so that the optical imaging system can achieve movement and / or rotation, etc. For example, it can drive the optical imaging system to slide in the module to achieve focusing.

[0084] In an exemplary embodiment, the module driving member may be assembled to the lens barrel of the optical imaging system (such as Fig.14 the lens barrel P0' shown), and can further drive the optical imaging system.

[0085] In an exemplary embodiment, the imaging module may further include a module connecting member, and the module connecting member may be assembled to the lens barrel of the optical imaging system (such as Figure 2The optical imaging system is shown in the lens barrel P0 shown in FIG. 1 ), and the module driver can further drive the optical imaging system through the module connector. Exemplarily, the module connector can be assembled in a groove formed by the object side boss structure, the image side boss structure and the outer peripheral surface between the two of the lens barrel P0. Exemplarily, the module connector can be fixed in the groove of the lens barrel P0 by glue point bonding.

[0086] In an exemplary embodiment, the module connector may be a magnet connector, and the module driver may electromagnetically drive the optical imaging system through the magnet connector. For example, the module driver may drive the optical imaging system to achieve sliding focus in the module.

[0087] In an exemplary embodiment, the module connector may be a square magnet, which may be fixed in the groove of the lens barrel by adhesive bonding. The module driver may be a motor, which may directly electromagnetically drive the optical imaging system by connecting to the square magnet of the lens barrel. For example, the drive system may realize sliding focus in the module.

[0088] In an exemplary embodiment, the camera module may also include one or more other optical imaging systems.

[0089] Specific embodiments of the optical imaging system applicable to the above-mentioned embodiments are further described below with reference to the accompanying drawings.

[0090] Example 1

[0091] The following reference Figure 2 An optical imaging system according to Example 1 of the present application is described.

[0092] like Figure 2 As shown, in this embodiment, the optical imaging system includes a lens barrel and a first lens E1, a second lens E2, a third lens E3, a fourth lens E4 and a fifth lens E5 accommodated in the lens barrel and arranged in sequence from the object side to the image side along the optical axis.

[0093] In this embodiment, the optical imaging system further comprises a plurality of spacer elements: a first spacer element P1, located on the image side of the first lens E1 and partially bearing against the image side surface of the first lens E1; a second spacer element P2, located on the image side of the second lens E2 and partially bearing against the image side surface of the second lens E2; a third spacer element P3, located on the image side of the third lens E3 and partially bearing against the image side surface of the third lens E3; a third auxiliary spacer element P3b, located on the image side of the third spacer element P3 and bearing against the image side surface of the third spacer element P3; a third auxiliary spacer element P3c, located on the image side of the third auxiliary spacer element P3b and bearing against the image side surface of the third auxiliary spacer element P3b; a fourth spacer element P4, located on the image side of the fourth lens E4 and partially bearing against the image side surface of the fourth lens E4; and a fourth auxiliary spacer element P4b, located on the image side of the fourth spacer element P4 and bearing against the image side surface of the fourth spacer element P4.

[0094] In this embodiment, the first lens E1 has positive power, its object side surface S1 is convex, and its image side surface S2 is concave. The second lens E2 has positive power, its object side surface S3 is convex, and its image side surface S4 is convex. The third lens E3 has negative power, its object side surface S5 is convex, and its image side surface S6 is concave. The fourth lens E4 has positive power, its object side surface S7 is concave, and its image side surface S8 is convex. The fifth lens E5 has negative power, its object side surface S9 is convex, and its image side surface S10 is concave.

[0095] Table 1 shows basic parameters of the optical imaging system of Example 1, wherein the units of the radius of curvature, thickness / distance and effective radius are all millimeters (mm).

[0096]

[0097]

[0098] Table 1

[0099] In Example 1, the object side surface and the image side surface of any lens among the first lens E1 to the fifth lens E5 are both aspherical surfaces, and the surface shape x of each aspherical lens can be defined by but not limited to the following aspherical surface formula:

[0100]

[0101] Wherein, x is the distance vector height from the vertex of the aspherical surface when the aspherical surface is 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 reciprocal of the curvature radius R in Table 1 above); k is the cone coefficient; Ai is the correction coefficient of the i-th order of the aspherical surface. The following Tables 2-1 and 2-2 give the high-order coefficients A4, A6, A8, A9, A10, A11, A12, A13, A14, A15, A16, A17, A18, A19, A20, A21, A22, A23, A24, A25, A26, A27, A28, A29, A30, A31, A32, A33, A34, A35, A36, A37, A38, A39, A40, A41, A42, A43, A44, A45, A46, A47, A48, A49, A50, A51, A52, A53, A54, A55, A56, A57, A58, A59, A60, A61, A71, A72, A73, A74, A7510 , A 12 , A 14 , A 16 , A 18 , A 20 , A 22 , A 24 , A 26 , A 28 and A 30 .

[0102] Face number A4 A6 A8 A10 A12 A14 A16 S1 2.0658E-03 -5.0214E-03 3.5227E-03 -1.5853E-03 6.4346E-04 -3.3183E-04 1.7648E-04 S2 8.1219E-03 -3.6124E-02 3.4888E-02 -1.9105E-02 6.0027E-03 -2.5985E-04 -7.5083E-04 S3 4.6452E-03 -3.1637E-02 3.1100E-02 -1.7624E-02 6.5327E-03 -1.3259E-03 -6.1228E-05 S4 4.8199E-03 -2.6770E-02 5.4280E-02 -6.1303E-02 4.7293E-02 -2.6659E-02 1.1121E-02 S5 -1.2461E-02 -2.1618E-02 6.8505E-02 -9.4398E-02 8.6832E-02 -5.9105E-02 3.0424E-02 S6 -1.8482E-02 -4.1191E-03 3.9906E-02 -9.0348E-02 1.3940E-01 -1.5817E-01 1.3130E-01 S7 4.1954E-03 4.3954E-02 -1.7832E-01 4.0469E-01 -6.1811E-01 6.6352E-01 -5.1266E-01 S8 7.7932E-02 -7.4449E-02 1.0301E-01 -1.5553E-01 1.9478E-01 -1.8323E-01 1.2640E-01 S9 -6.4331E-02 1.8645E-02 -3.6426E-02 8.3289E-02 -1.1060E-01 9.4358E-02 -5.5237E-02 S10 -1.5620E-01 9.0482E-02 -6.8761E-02 6.1649E-02 -5.2255E-02 3.5026E-02 -1.7410E-02

[0103] Table 2-1

[0104] Face number A18 A20 A22 A24 A26 A28 A30 S1 -7.0818E-05 1.9468E-05 -3.6006E-06 4.4110E-07 -3.4376E-08 1.5457E-09 -3.0568E-11 S2 3.9914E-04 -1.1202E-04 2.0031E-05 -2.3626E-06 1.7941E-07 -7.9954E-09 1.5951E-10 S3 1.2890E-04 -4.0498E-05 6.9396E-06 -7.3101E-07 4.7653E-08 -1.8054E-09 3.1582E-11 S4 -3.4195E-03 7.6768E-04 -1.2378E-04 1.3923E-05 -1.0349E-06 4.5597E-08 -8.9971E-10 S5 -1.1778E-02 3.3847E-03 -7.0873E-04 1.0491E-04 -1.0398E-05 6.1890E-07 -1.6716E-08 S6 -7.9047E-02 3.4274E-02 -1.0563E-02 2.2515E-03 -3.1462E-04 2.5834E-05 -9.4019E-07 S7 2.8853E-01 -1.1843E-01 3.5078E-02 -7.3020E-03 1.0135E-03 -8.4207E-05 3.1677E-06 S8 -6.3615E-02 2.3232E-02 -6.0747E-03 1.1061E-03 -1.3296E-04 9.4685E-06 -3.0200E-07 S9 2.2895E-02 -6.7913E-03 1.4336E-03 -2.1035E-04 2.0388E-05 -1.1734E-06 3.0364E-08 S10 6.3149E-03 -1.6597E-03 3.1214E-04 -4.0908E-05 3.5466E-06 -1.8276E-07 4.2377E-09

[0105] Table 2-2

[0106] Example 2

[0107] The following reference Figure 3 Describe the optical imaging system according to Example 2 of the present application.

[0108] like Figure 3 As shown, in this embodiment, the optical imaging system includes a lens barrel and a first lens E1, a second lens E2, a third lens E3, a fourth lens E4 and a fifth lens E5 accommodated in the lens barrel and arranged in sequence from the object side to the image side along the optical axis. The optical imaging system further comprises a plurality of spacer elements: a first spacer element P1, located on the image side of the first lens E1 and partially bearing against the image side surface of the first lens E1; a second spacer element P2, located on the image side of the second lens E2 and partially bearing against the image side surface of the second lens E2; a third spacer element P3, located on the image side of the third lens E3 and partially bearing against the image side surface of the third lens E3; a third auxiliary spacer element P3b, located on the image side of the third spacer element P3 and bearing against the image side surface of the third spacer element P3; a third auxiliary spacer element P3c, located on the image side of the third auxiliary spacer element P3b and bearing against the image side surface of the third auxiliary spacer element P3b; a fourth spacer element P4, located on the image side of the fourth lens E4 and partially bearing against the image side surface of the fourth lens E4; and a fourth auxiliary spacer element P4b, located on the image side of the fourth spacer element P4 and bearing against the image side surface of the fourth spacer element P4.

[0109] The structure of the optical imaging system of this embodiment is the same as that of the optical imaging system of Embodiment 1, that is, the basic parameter table of the optical imaging system of this embodiment is the same as Table 1, and the high-order coefficient table of the aspheric mirror is the same as Table 2-1 and Table 2-2.

[0110] The difference between this embodiment and embodiment 1 lies in the different parameters such as the structural dimensions of the lens barrel and some of the spacing elements and the spacing of some of the spacing elements along the optical axis. The values ​​of multiple parameters of the lens barrel and the spacing elements included in the optical imaging system of this embodiment and embodiment 1 are shown in Table 7 below, and the multiple parameters specifically include:

[0111] an inner diameter d1s of the object side surface of the first spacer element P1, an outer diameter D1s of the object side surface of the first spacer element P1, an inner diameter d2s of the object side surface of the second spacer element P2, an inner diameter d2m of the image side surface of the second spacer element P2, an outer diameter D2m of the image side surface of the second spacer element P2, an inner diameter d3s of the object side surface of the third spacer element P3, an inner diameter d3m of the image side surface of the third spacer element P3, an outer diameter D3m of the image side surface of the third spacer element P3, an inner diameter d4s of the object side surface of the fourth spacer element P4, an inner diameter d4m of the image side surface of the fourth spacer element P4, an outer diameter D4m of the image side surface of the fourth spacer element P4, a distance EP01 from the object side end surface of the lens barrel to the object side surface of the first spacer element on the optical axis, a maximum thickness CP1 of the first spacer element P1 along the optical axis, a distance d3s from the image side surface of the first spacer element P1 to the image side surface of the second spacer element P3 2 on the optical axis EP12, the distance EP23 from the image side of the second spacing element P2 to the object side of the third spacing element P3 on the optical axis, the maximum thickness CP3 of the third spacing element P3 along the optical axis, the distance EP34 from the image side of the third spacing element P3 to the object side of the fourth spacing element P4 on the optical axis, the maximum thickness CP4 of the fourth spacing element P4 along the optical axis, the sum of the maximum thicknesses ∑CP of each spacing element in the optical imaging system along the optical axis, the sum of the distances ∑EP between any two adjacent spacing elements of all spacing elements included in the optical imaging system on the optical axis, the sum of the air gaps ∑AT between any two adjacent lenses with optical power in the optical imaging system on the optical axis, the maximum height L of the lens barrel, and the maximum thickness CP3b of the third auxiliary spacing element P3b along the optical axis. The units of the values ​​of the parameters shown in Table 7 are all millimeters (mm), and the schematic diagram of some parameters in the structural diagram of the optical imaging system can be found in the attached Figure 1 .

[0112] Example 3

[0113] The following reference Figure 4 Describe the optical lens according to Example 3 of the present application.

[0114] like Figure 4As shown, in this embodiment, the optical imaging system includes a lens barrel and a first lens E1, a second lens E2, a third lens E3, a fourth lens E4 and a fifth lens E5 accommodated in the lens barrel and arranged in sequence from the object side to the image side along the optical axis. The optical imaging system also includes a plurality of spacing elements: a first spacing element P1, located on the image side of the first lens E1 and partially bearing against the image side surface of the first lens E1; a second spacing element P2, located on the image side of the second lens E2 and partially bearing against the image side surface of the second lens E2; a second auxiliary spacing element P2b, located on the image side of the second spacing element P2 and bearing against the image side surface of the second spacing element P2; a third spacing element P3, located on the image side of the third lens E3 and partially bearing against the image side surface of the third lens E3; a third auxiliary spacing element P3b, located on the image side of the third spacing element P3 and bearing against the image side surface of the third spacing element P3; a fourth spacing element P4, located on the image side of the fourth lens E4 and partially bearing against the image side surface of the fourth lens E4; and a fourth auxiliary spacing element P4b, located on the image side of the fourth spacing element P4 and bearing against the image side surface of the fourth spacing element P4.

[0115] The structure of the optical imaging system of this embodiment is also the same as that of the optical imaging system of Embodiment 1, that is, the basic parameter table of the optical imaging system of this embodiment is the same as Table 1, and the high-order coefficient table of the aspheric mirror surface is the same as Table 2-1 and Table 2-2.

[0116] The difference between this embodiment and embodiment 1 is also that the parameters such as the structural dimensions of the lens barrel and some of the spacing elements and the spacing of some of the spacing elements along the optical axis are different. The values ​​of multiple parameters of the lens barrel and the spacing elements included in the optical imaging system of this embodiment and embodiment 1 are also shown in Table 7 below, and the specific description of the multiple parameters is the same as the relevant description in the above embodiment 2, which will not be repeated here.

[0117] Figure 5 Astigmatism curves of the optical imaging systems of Example 1, Example 2 and Example 3 are shown, which represent meridional image curvature and sagittal image curvature. Figure 6 Distortion curves of the optical imaging systems of Embodiment 1, Embodiment 2 and Embodiment 3 are shown, which represent the distortion magnitude values ​​corresponding to different image heights. Figure 7 The axial chromatic aberration curves of the optical imaging systems of Embodiment 1, Embodiment 2 and Embodiment 3 are shown, which indicate the deviation of the convergent focus of light rays of different wavelengths after passing through the lens. Figures 5 to 7 It can be seen that the optical imaging systems provided in Embodiment 1, Embodiment 2 and Embodiment 3 can achieve good imaging quality.

[0118] Example 4

[0119] The following reference Figure 8Describe the optical imaging system according to Example 4 of the present application.

[0120] like Figure 8 As shown, in this embodiment, the optical imaging system includes a lens barrel and a first lens E1, a second lens E2, a third lens E3, a fourth lens E4 and a fifth lens E5 accommodated in the lens barrel and arranged in sequence from the object side to the image side along the optical axis.

[0121] In this embodiment, the optical imaging system further comprises a plurality of spacer elements: a first spacer element P1, located on the image side of the first lens E1 and partially bearing against the image side surface of the first lens E1; a second spacer element P2, located on the image side of the second lens E2 and partially bearing against the image side surface of the second lens E2; a third spacer element P3, located on the image side of the third lens E3 and partially bearing against the image side surface of the third lens E3; a third auxiliary spacer element P3b, located on the image side of the third spacer element P3 and bearing against the image side surface of the third spacer element P3; a third auxiliary spacer element P3c, located on the image side of the third auxiliary spacer element P3b and bearing against the image side surface of the third auxiliary spacer element P3b; a fourth spacer element P4, located on the image side of the fourth lens E4 and partially bearing against the image side surface of the fourth lens E4; and a fourth auxiliary spacer element P4b, located on the image side of the fourth spacer element P4 and bearing against the image side surface of the fourth spacer element P4.

[0122] In this embodiment, the first lens E1 has positive power, its object side surface S1 is convex, and its image side surface S2 is concave. The second lens E2 has positive power, its object side surface S3 is convex, and its image side surface S4 is convex. The third lens E3 has negative power, its object side surface S5 is convex, and its image side surface S6 is concave. The fourth lens E4 has positive power, its object side surface S7 is concave, and its image side surface S8 is convex. The fifth lens E5 has negative power, its object side surface S9 is convex, and its image side surface S10 is concave.

[0123] Table 3 shows the basic parameters of the optical imaging system of Example 4, wherein the units of the radius of curvature, thickness / distance and effective radius are all millimeters (mm).

[0124]

[0125]

[0126] Table 3

[0127] In this embodiment, the object side surface and the image side surface of any one of the first lens E1 to the fifth lens E5 are aspherical surfaces, and the surface shape of each aspherical surface can be defined by the formula (1) given in the above embodiment 1. Tables 4-1 and 4-2 show the high-order coefficients A4, A6, A8, A9, A10, A11, A12, A13, A14, A15, A16, A17, A18, A19, A20, A21, A22, A23, A24, A25, A26, A27, A28, A29, A30, A31, A32, A33, A34, A35, A36, A37, A38, A39, A40, A41, A42, A43, A44, A45, A46, A47, A48, A49, A50, A51, A52, A53, A54, A55, A56, A57, A58, A59, A60, A61, A71, A72, A73, A74, A75 10, A 12 , A 14 , A 16 , A 18 , A 20 , A 22 , A 24 , A 26 , A 28 and A 30 .

[0128] Face number A4 A6 A8 A10 A12 A14 A16 S1 -3.1994E-04 7.3922E-04 -1.2064E-03 -1.1551E-04 9.6334E-04 -7.1872E-04 2.7727E-04 S2 -5.1242E-03 8.4183E-03 -2.3865E-02 1.7573E-02 -1.9141E-03 -4.1367E-03 2.8606E-03 S3 -6.3572E-03 9.5887E-03 -2.8251E-02 2.4032E-02 -7.1260E-03 -1.3966E-03 1.8393E-03 S4 2.9375E-02 -5.5454E-02 3.1838E-02 2.3859E-02 -4.9410E-02 3.7130E-02 -1.6854E-02 S5 2.0751E-02 -5.3969E-02 3.0281E-02 3.4091E-02 -6.5738E-02 4.9687E-02 -2.2403E-02 S6 -2.8932E-03 -1.2834E-02 2.2819E-02 -2.7709E-02 3.2270E-02 -3.2782E-02 2.4541E-02 S7 9.7947E-03 9.2362E-04 -2.0711E-02 5.2290E-02 -8.5181E-02 9.5228E-02 -7.5316E-02 S8 3.5638E-02 -2.1460E-02 1.7594E-02 -1.8025E-02 1.4617E-02 -8.4752E-03 3.3432E-03 S9 -1.0466E-01 6.2865E-02 -3.2035E-02 -2.7665E-04 1.8905E-02 -1.9674E-02 1.1838E-02 S10 -1.5721E-01 1.0861E-01 -8.3925E-02 5.6949E-02 -3.1825E-02 1.4358E-02 -5.1814E-03

[0129] Table 4-1

[0130] Face number A18 A20 A22 A24 A26 A28 A30 S1 -6.6326E-05 1.0393E-05 -1.0711E-06 6.9758E-08 -2.5634E-09 3.6908E-11 2.0643E-13 S2 -9.7596E-04 2.0843E-04 -2.9587E-05 2.8049E-06 -1.7128E-07 6.1076E-09 -9.6801E-11 S3 -6.9597E-04 1.5168E-04 -2.1221E-05 1.9379E-06 -1.1170E-07 3.6773E-09 -5.2323E-11 S4 5.1728E-03 -1.1166E-03 1.7075E-04 -1.8186E-05 1.2862E-06 -5.4389E-08 1.0417E-09 S5 6.6288E-03 -1.3174E-03 1.7238E-04 -1.3723E-05 5.1032E-07 4.6479E-09 -7.4757E-10 S6 -1.2772E-02 4.5814E-03 -1.1256E-03 1.8533E-04 -1.9420E-05 1.1579E-06 -2.9335E-08 S7 4.2776E-02 -1.7500E-02 5.1093E-03 -1.0380E-03 1.3936E-04 -1.1111E-05 3.9829E-07 S8 -8.1530E-04 7.7762E-05 2.0033E-05 -8.8636E-06 1.5167E-06 -1.3163E-07 4.7705E-09 S9 -4.8286E-03 1.3910E-03 -2.8428E-04 4.0422E-05 -3.8085E-06 2.1400E-07 -5.4339E-09 S10 1.4813E-03 -3.3019E-04 5.5928E-05 -6.9155E-06 5.8540E-07 -3.0176E-08 7.1148E-10

[0131] Table 4-2

[0132] Example 5

[0133] The following reference Fig. 9 Describe the optical imaging system according to Example 5 of the present application.

[0134] like Fig. 9 As shown, in this embodiment, the optical imaging system includes a lens barrel and a first lens E1, a second lens E2, a third lens E3, a fourth lens E4 and a fifth lens E5 which are accommodated in the lens barrel and arranged in sequence from the object side to the image side along the optical axis. The optical imaging system also includes a plurality of spacing elements: a first spacing element P1, which is located on the image side of the first lens E1 and partially bears against the image side surface of the first lens E1; a second spacing element P2, which is located on the image side of the second lens E2 and partially bears against the image side surface of the second lens E2; a third spacing element P3, which is located on the image side of the third lens E3 and partially bears against the image side surface of the third lens E3; a third auxiliary spacing element P3b, which is located on the image side of the third spacing element P3 and bears against the image side surface of the third spacing element P3; a third auxiliary spacing element P3c, which is located on the image side of the third auxiliary spacing element P3b and bears against the image side surface of the third auxiliary spacing element P3b; and a fourth spacing element P4, which is located on the image side of the fourth lens E4 and partially bears against the image side surface of the fourth lens E4.

[0135] The structure of the optical imaging system of this embodiment is the same as that of the optical imaging system of Example 4, that is, the basic parameter table of the optical imaging system of this embodiment is the same as Table 3, and the high-order coefficient table of the aspheric mirror is the same as Table 4-1 and Table 4-2.

[0136] The difference between this embodiment and embodiment 4 is that the structural dimensions of the lens barrel and some of the spacing elements and the spacing of some of the spacing elements along the optical axis are different. The values ​​of multiple parameters of the lens barrel and the spacing elements included in the optical imaging system of this embodiment and embodiment 4 are shown in Table 7 below, and the specific description of the multiple parameters is the same as that in the above embodiment 2, and will not be repeated here.

[0137] Example 6

[0138] The following reference Fig.10 Describe the optical lens according to Example 6 of the present application.

[0139] like Fig.10 As shown, in this embodiment, the optical imaging system includes a lens barrel and a first lens E1, a second lens E2, a third lens E3, a fourth lens E4 and a fifth lens E5 which are accommodated in the lens barrel and arranged in sequence from the object side to the image side along the optical axis. The optical imaging system also includes a plurality of spacing elements: a first spacing element P1, which is located on the image side of the first lens E1 and partially bears against the image side surface of the first lens E1; a second spacing element P2, which is located on the image side of the second lens E2 and partially bears against the image side surface of the second lens E2; a third spacing element P3, which is located on the image side of the third lens E3 and partially bears against the image side surface of the third lens E3; a third auxiliary spacing element P3b, which is located on the image side of the third spacing element P3 and bears against the image side surface of the third spacing element P3; and a fourth spacing element P4, which is located on the image side of the fourth lens E4 and partially bears against the image side surface of the fourth lens E4.

[0140] The structure of the optical imaging system of this embodiment is also the same as that of the optical imaging system of Embodiment 4, that is, the basic parameter table of the optical imaging system of this embodiment is the same as Table 3, and the high-order coefficient table of the aspheric mirror surface is the same as Table 4-1 and Table 4-2.

[0141] The difference between this embodiment and embodiment 4 is also that the structural dimensions of the lens barrel and some of the spacing elements and the spacing of some of the spacing elements along the optical axis are different. The values ​​of multiple parameters of the lens barrel and the spacing elements included in the optical imaging system of this embodiment and embodiment 4 are also shown in Table 7 below, and the specific description of the multiple parameters is also the same as the relevant description in the above embodiment 2, which will not be repeated here.

[0142] Fig.11 Astigmatism curves of the optical imaging systems of Example 4, Example 5 and Example 6 are shown, which represent meridional image plane curvature and sagittal image plane curvature. Fig.12 The distortion curves of the optical imaging systems of Embodiment 4, Embodiment 5 and Embodiment 6 are shown, which represent the distortion magnitude values ​​corresponding to different image heights. Fig.13The axial chromatic aberration curves of the optical imaging systems of Embodiment 4, Embodiment 5 and Embodiment 6 are shown, which indicate the deviation of the convergent focus of light of different wavelengths after passing through the lens. Figures 11 to 13 It can be seen that the optical imaging systems provided in Embodiment 4, Embodiment 5 and Embodiment 6 can achieve good imaging quality.

[0143] Example 7

[0144] The following reference Fig.14 Describe the optical imaging system according to Example 7 of the present application.

[0145] like Fig.14 As shown, in this embodiment, the optical imaging system includes a lens barrel and a first lens E1, a second lens E2, a third lens E3, a fourth lens E4 and a fifth lens E5 accommodated in the lens barrel and arranged in sequence from the object side to the image side along the optical axis.

[0146] In this embodiment, the optical imaging system further comprises a plurality of spacer elements: a first spacer element P1, located on the image side of the first lens E1 and partially bearing against the image side surface of the first lens E1; a second spacer element P2, located on the image side of the second lens E2 and partially bearing against the image side surface of the second lens E2; a third spacer element P3, located on the image side of the third lens E3 and partially bearing against the image side surface of the third lens E3; a third auxiliary spacer element P3b, located on the image side of the third spacer element P3 and bearing against the image side surface of the third spacer element P3; a third auxiliary spacer element P3c, located on the image side of the third auxiliary spacer element P3b and bearing against the image side surface of the third auxiliary spacer element P3b; a fourth spacer element P4, located on the image side of the fourth lens E4 and partially bearing against the image side surface of the fourth lens E4; and a fourth auxiliary spacer element P4b, located on the image side of the fourth spacer element P4 and bearing against the image side surface of the fourth spacer element P4.

[0147] In this embodiment, the first lens E1 has positive power, its object side surface S1 is convex, and its image side surface S2 is concave. The second lens E2 has positive power, its object side surface S3 is convex, and its image side surface S4 is convex. The third lens E3 has negative power, its object side surface S5 is convex, and its image side surface S6 is concave. The fourth lens E4 has positive power, its object side surface S7 is concave, and its image side surface S8 is convex. The fifth lens E5 has negative power, its object side surface S9 is convex, and its image side surface S10 is concave.

[0148] Table 5 shows the basic parameters of the optical imaging system of Example 7, wherein the units of the radius of curvature, thickness / distance and effective radius are all millimeters (mm).

[0149]

[0150] Table 5

[0151] In this embodiment, the object side surface and the image side surface of any one of the first lens E1 to the fifth lens E5 are aspherical surfaces, and the surface shape of each aspherical surface can be defined by the formula (1) given in the above embodiment 1. Tables 6-1 and 6-2 show the high-order coefficients A4, A6, A8, A9, A10, A11, A12, A13, A14, A15, A16, A17, A18, A19, A20, A21, A22, A23, A24, A25, A26, A27, A28, A29, A30, A31, A32, A33, A34, A35, A36, A37, A38, A39, A40, A41, A42, A43, A44, A45, A46, A47, A48, A49, A50, 10 , A 12 , A 14 , A 16 , A 18 , A 20 , A 22 , A 24 , A 26 , A 28 and A 30 .

[0152] Face number A4 A6 A8 A10 A12 A14 A16 S1 9.8647E-04 -5.5534E-03 1.0480E-02 -1.2879E-02 1.0205E-02 -5.3662E-03 1.9340E-03 S2 1.0196E-03 -2.3482E-02 4.6625E-02 -6.9244E-02 6.5438E-02 -3.9225E-02 1.5594E-02 S3 -2.4410E-03 -1.5136E-02 2.9045E-02 -4.7314E-02 4.7401E-02 -2.8914E-02 1.1396E-02 S4 2.7654E-03 1.6591E-02 -9.8031E-02 1.6618E-01 -1.5047E-01 8.6249E-02 -3.3750E-02 S5 2.0690E-04 3.7382E-02 -1.5847E-01 2.6383E-01 -2.4710E-01 1.4865E-01 -6.1265E-02 S6 2.6389E-03 6.2453E-04 -8.3948E-03 -5.3718E-03 4.7550E-02 -7.8321E-02 6.9656E-02 S7 5.0317E-03 7.1921E-03 -2.0908E-02 4.2426E-02 -6.4133E-02 6.8629E-02 -5.2188E-02 S8 -2.5017E-02 3.5051E-02 -4.5249E-02 5.8832E-02 -6.6667E-02 5.7817E-02 -3.6883E-02 S9 -1.1472E-01 4.1393E-02 -1.4296E-03 -1.7405E-02 1.8226E-02 -1.0676E-02 3.9929E-03 S10 -1.1232E-01 3.8396E-02 -3.7170E-03 -1.2174E-02 1.3811E-02 -8.7598E-03 3.7796E-03

[0153] Table 6-1

[0154]

[0155]

[0156] Table 6-2

[0157] Example 8

[0158] The following reference Fig.15 Describe the optical imaging system according to Example 8 of the present application.

[0159] like Fig.15 As shown, in this embodiment, the optical imaging system includes a lens barrel and a first lens E1, a second lens E2, a third lens E3, a fourth lens E4 and a fifth lens E5 which are accommodated in the lens barrel and arranged in sequence from the object side to the image side along the optical axis. The optical imaging system also includes a plurality of spacing elements: a first spacing element P1, which is located on the image side of the first lens E1 and partially bears against the image side surface of the first lens E1; a second spacing element P2, which is located on the image side of the second lens E2 and partially bears against the image side surface of the second lens E2; a third spacing element P3, which is located on the image side of the third lens E3 and partially bears against the image side surface of the third lens E3; a third auxiliary spacing element P3b, which is located on the image side of the third spacing element P3 and bears against the image side surface of the third spacing element P3; a third auxiliary spacing element P3c, which is located on the image side of the third auxiliary spacing element P3b and bears against the image side surface of the third auxiliary spacing element P3b; and a fourth spacing element P4, which is located on the image side of the fourth lens E4 and partially bears against the image side surface of the fourth lens E4.

[0160] The structure of the optical imaging system of this embodiment is the same as that of the optical imaging system of Example 7, that is, the basic parameter table of the optical imaging system of this embodiment is the same as Table 5, and the high-order coefficient table of the aspheric mirror is the same as Table 6-1 and Table 6-2.

[0161] The difference between this embodiment and embodiment 7 is that the structural dimensions of the lens barrel and some of the spacing elements and the spacing of some of the spacing elements along the optical axis are different. The values ​​of multiple parameters of the lens barrel and the spacing elements included in the optical imaging system of this embodiment and embodiment 7 are also shown in Table 7 below. The specific description of the multiple parameters is the same as that described in the above embodiment 2, and will not be repeated here.

[0162] Example 9

[0163] The following reference Fig.16 Describe the optical lens according to Example 9 of the present application.

[0164] like Fig.16 As shown, in this embodiment, the optical imaging system includes a lens barrel and a first lens E1, a second lens E2, a third lens E3, a fourth lens E4 and a fifth lens E5 which are accommodated in the lens barrel and arranged in sequence from the object side to the image side along the optical axis. The optical imaging system also includes a plurality of spacing elements: a first spacing element P1, which is located on the image side of the first lens E1 and partially bears against the image side surface of the first lens E1; a second spacing element P2, which is located on the image side of the second lens E2 and partially bears against the image side surface of the second lens E2; a third spacing element P3, which is located on the image side of the third lens E3 and partially bears against the image side surface of the third lens E3; a third auxiliary spacing element P3b, which is located on the image side of the third spacing element P3 and bears against the image side surface of the third spacing element P3; and a fourth spacing element P4, which is located on the image side of the fourth lens E4 and partially bears against the image side surface of the fourth lens E4.

[0165] The structure of the optical imaging system of this embodiment is also the same as the structure of the optical imaging system of Example 7, that is, the basic parameter table of the optical imaging system of this embodiment is the same as Table 5, and the high-order coefficient table of the aspheric mirror surface is the same as Table 6-1 and Table 6-2.

[0166] The difference between this embodiment and embodiment 7 is also that the parameters such as the structural dimensions of the lens barrel and some of the spacing elements and the spacing of some of the spacing elements along the optical axis are different. The values ​​of multiple parameters of the lens barrel and the spacing elements included in the optical imaging system of this embodiment and embodiment 7 are also shown in Table 7 below, and the specific description of the multiple parameters is also the same as that described in the above embodiment 2, and will not be repeated here.

[0167] Fig.17Astigmatism curves of the optical imaging systems of Example 7, Example 8 and Example 9 are shown, which represent the meridional image plane curvature and the sagittal image plane curvature. Fig.18 Distortion curves of the optical imaging systems of Embodiment 7, Embodiment 8 and Embodiment 9 are shown, which represent the distortion magnitude values ​​corresponding to different image heights. Fig.19 The axial chromatic aberration curves of the optical imaging systems of Embodiment 7, Embodiment 8 and Embodiment 9 are shown, which indicate the deviation of the convergent focus of light rays of different wavelengths after passing through the lens. Figures 17 to 19 It can be seen that the optical imaging systems provided in Examples 7, 8 and 9 can achieve good imaging quality.

[0168] Parameters / Examples 1 2 3 4 5 6 7 8 9 d1s 4.83 4.79 4.89 5.40 5.37 5.42 5.59 5.58 5.60 D1s 6.20 6.60 6.61 6.70 7.02 7.00 7.02 7.32 7.32 d2s 3.97 3.71 4.99 4.72 4.72 5.02 5.07 5.07 5.25 d2m 3.97 3.71 4.83 4.72 4.72 5.02 5.07 5.07 5.25 D2m 6.06 6.46 6.17 6.56 6.86 6.86 6.88 7.18 7.18 d3s 3.25 3.25 3.28 3.99 3.98 3.99 4.17 4.16 4.32 d3m 3.25 3.25 3.28 3.99 3.98 3.99 4.17 4.16 5.05 D3m 5.82 6.22 6.22 6.42 6.72 6.72 6.74 7.04 6.39 d4s 4.15 4.16 3.87 4.42 4.29 4.27 4.50 4.40 4.38 d4m 4.70 4.70 3.87 4.96 4.29 4.27 4.96 4.40 4.38 D4m 5.34 5.64 5.86 5.70 6.38 6.38 6.02 6.70 6.70 EP01 1.48 1.51 1.38 1.44 1.50 1.40 1.57 1.65 1.52 CP1 0.02 0.02 0.02 0.02 0.02 0.02 0.02 0.02 0.02 EP12 0.83 0.92 0.77 0.69 0.63 0.52 0.59 0.52 0.52 EP23 1.08 0.94 1.13 1.05 1.15 1.25 1.16 1.30 1.43 CP3 0.02 0.02 0.02 0.02 0.02 0.02 0.02 0.02 1.91 EP34 2.03 1.94 1.76 3.02 3.32 3.22 2.87 3.04 1.01 CP4 0.51 0.60 0.02 0.85 0.02 0.02 0.68 0.02 0.02 ∑CP 2.21 2.15 2.24 3.34 2.39 2.50 2.86 1.88 2.00 ∑EP 5.43 5.31 5.04 6.20 6.60 6.40 6.19 6.51 4.48 ∑AT 3.17 3.17 3.17 4.27 4.27 4.27 3.98 3.98 3.98 L 8.93 8.93 8.93 8.93 8.93 8.93 8.15 8.15 8.15 CP3b 1.59 1.44 1.26 2.38 2.28 2.41 2.07 1.77 0.02

[0169] Table 7

[0170] In addition, in Examples 1 to 9, the effective focal length f of the optical imaging system and the effective focal length values ​​f1 to f5 of each of the first lens to the fifth lens are respectively as shown in Table 8 below.

[0171] Parameters / Examples 1 2 3 4 5 6 7 8 9 f(mm) 12.13 12.13 12.13 14.35 14.35 14.35 15.01 15.01 15.01 f1(mm) 34.37 34.37 34.37 31.27 31.27 31.27 46.82 46.82 46.82 f2(mm) 5.59 5.59 5.59 5.93 5.93 5.93 6.47 6.47 6.47 f3(mm) -5.57 -5.57 -5.57 -6.58 -6.58 -6.58 -7.69 -7.69 -7.69 f4(mm) 5.78 5.78 5.78 8.83 8.83 8.83 55.39 55.39 55.39 f5(mm) -6.02 -6.02 -6.02 -6.66 -6.66 -6.66 -28.80 -28.80 -28.80

[0172] Table 8 Examples 1 to 9 respectively satisfy the conditions shown in Table 9 below.

[0173] Conditional / Example 1 2 3 4 5 6 7 8 9 L / f 0.74 0.74 0.74 0.62 0.62 0.62 0.54 0.54 0.54 (EP23+CP3) / CT2 0.74 0.64 0.77 0.76 0.83 0.90 0.79 0.89 2.25 (EP23+CP3) / CT3 2.44 2.12 2.53 2.69 2.94 3.18 2.89 3.23 8.17 |f3| / (EP23+CT3) 3.62 4.00 3.52 4.53 4.24 3.99 4.91 4.51 4.19 (D3m-d3m) / f3 -0.46 -0.53 -0.53 -0.37 -0.42 -0.42 -0.33 -0.38 -0.17 d4m / T45 14.10 14.10 11.62 9.56 8.26 8.22 9.67 8.58 8.53 d3m / T34 1.30 1.30 1.31 1.11 1.11 1.11 1.26 1.25 1.52 EP12 / ∑EP×L(mm) 1.36 1.55 1.36 0.99 0.85 0.73 0.78 0.65 0.94 f4×N4 / D4m 1.77 1.68 1.62 2.54 2.27 2.27 15.08 13.56 13.56 |R3+R4| / d2s 1.54 1.65 1.23 1.57 1.57 1.48 3.90 3.90 3.77 R9 / N5 / d4s 0.81 0.81 0.87 0.65 0.67 0.67 0.41 0.42 0.42 CP3b / (EP34+CT3+CT4) 0.53 0.49 0.46 0.58 0.52 0.56 0.52 0.43 0.01 (d3s+d4s) / (T45+T34) 2.61 2.61 2.52 2.05 2.01 2.01 2.26 2.23 2.27 (CT4+CT3) / EP34 0.48 0.50 0.55 0.35 0.32 0.33 0.38 0.36 1.08 (EP01+CP1) / (D1s-d1s) 1.10 0.85 0.82 1.12 0.92 0.90 1.11 0.96 0.90 R4 / (D2m-d2m) -4.86 -3.70 -7.59 -6.31 -5.43 -6.30 -13.15 -11.28 -12.28 (L-∑AT) / ∑CP 2.61 2.68 2.57 1.39 1.95 1.87 1.46 2.22 2.09

[0174] Table 9

[0175] The present application also provides an imaging device, which is provided with an electronic photosensitive element for imaging, and the electronic photosensitive element can be a charge coupled device (CCD) or a complementary metal oxide semiconductor (CMOS). The imaging device can be an independent imaging device such as a digital camera, or an imaging module integrated in a mobile electronic device such as a mobile phone. The imaging device is equipped with the optical imaging system described above.

[0176] The above description is only a preferred embodiment of the present application and an explanation of the technical principles used. Those skilled in the art should understand that the scope of protection involved in the present application is not limited to the technical solution formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the concept of the present application. For example, the above features are replaced with the technical features with similar functions disclosed in the present application (but not limited to) to form a technical solution.

Claims

1. An optical imaging system, characterized in that: It includes a lens barrel, a lens group, and a plurality of spacer elements accommodated in the lens barrel. Among them, the lens group includes a first lens, a second lens, a third lens, a fourth lens, and a fifth lens arranged in sequence from the object side to the image side along the optical axis, the plurality of spacer elements include: a first spacer element located on the image side of the first lens and partially abutting against the image side surface of the first lens; a second spacer element located on the image side of the second lens and partially abutting against the image side surface of the second lens; a third spacer element located on the image side of the third lens and partially abutting against the image side surface of the third lens; a fourth spacer element located on the image side of the fourth lens and partially abutting against the image side surface of the fourth lens; the optical imaging system satisfies: 0.50 < L / f < 0.75, 0.60 < (EP23 + CP3) / CT2 < 2.50, and 2.00 < (EP23 + CP3) / CT3 < 8.50, wherein, L is the maximum height of the lens barrel, f is the effective focal length of the optical imaging system, EP23 is the distance between the second spacer element and the third spacer element on the optical axis, CP3 is the maximum thickness of the third spacer element along the optical axis direction, CT2 is the central thickness of the second lens on the optical axis, and CT3 is the central thickness of the third lens on the optical axis.

2. The optical imaging system according to claim 1, characterized in that: The effective focal length f3 of the third lens satisfies: 3.50 < |f3| / (EP23 + CT3) < 4.

93.

3. The optical imaging system according to claim 1, characterized in that: The outer diameter D3m of the image side surface of the third spacer element, the inner diameter d3m of the image side surface of the third spacer element, and the effective focal length f3 of the third lens satisfy: -0.56 < (D3m - d3m) / f3 < -0.

15.

4. The optical imaging system according to claim 1, characterized in that: The inner diameter d4m of the image side surface of the fourth spacer element, the air gap T45 between the fourth lens and the fifth lens on the optical axis, the inner diameter d3m of the image side surface of the third spacer element, and the air gap T34 between the third lens and the fourth lens on the optical axis satisfy: 8.10 < d4m / T45 < 14.50 and 1.00 < d3m / T34 < 1.

55.

5. The optical imaging system according to claim 1, characterized in that: The distance EP12 between the first spacer element and the second spacer element on the optical axis and the sum ∑EP of the distances between any two adjacent spacer elements among all the spacer elements included in the optical imaging system on the optical axis satisfy: 0.62mm < EP12 / ∑EP × L < 1.58mm.

6. The optical imaging system according to claim 1, characterized in that: The effective focal length f4 of the fourth lens, the refractive index N4 of the fourth lens, and the outer diameter D4m of the image side surface of the fourth spacer element satisfy: 1.60 < f4 × N4 / D4m < 15.

17.

7. The optical imaging system according to claim 1, characterized in that: The curvature radius R3 of the object side surface of the second lens, the curvature radius R4 of the image side surface of the second lens, and the inner diameter d2s of the object side surface of the second spacer element satisfy: 1.20 < |R3 + R4| / d2s < 4.

00.

8. The optical imaging system according to claim 1, characterized in that: The curvature radius R9 of the object side surface of the fifth lens, the refractive index N5 of the fifth lens, and the inner diameter d4s of the object side surface of the fourth spacer element satisfy: 0.38 <R9 / N5 / d4s<0.89。 9. The optical imaging system according to claim 1, characterized in that: The plurality of spacing elements further include: a third auxiliary spacing element, located on the image side of the third spacing element and at least partially in abutment with the image side surface of the third spacing element; The maximum thickness CP3b of the third auxiliary spacer element along the optical axis, the distance EP34 from the third spacer element to the fourth spacer element on the optical axis, and the center thickness CT4 of the fourth lens on the optical axis satisfy: 0.00 <CP3b / (EP34+CT3+CT4)<0.61。 10. The optical imaging system according to claim 1, characterized in that: The inner diameter d3s of the object side surface of the third spacer element, the inner diameter d4s of the object side surface of the fourth spacer element, the air gap T34 between the third lens and the fourth lens on the optical axis, and the air gap T45 between the fourth lens and the fifth lens on the optical axis satisfy: 2.00<(d3s+d4s) / (T34+T45)<2.

65.

11. The optical imaging system according to claim 1, characterized in that: The center thickness CT4 of the fourth lens on the optical axis and the distance EP34 from the third spacing element to the fourth spacing element on the optical axis satisfy: 0.30<(CT3+CT4) / EP34<1.

20.

12. The optical imaging system according to claim 1, characterized in that: The distance EP01 from the object side end surface of the lens barrel to the object side surface of the first spacer element on the optical axis, the maximum thickness CP1 of the first spacer element along the optical axis, the outer diameter D1s of the object side surface of the first spacer element, and the inner diameter d1s of the object side surface of the first spacer element satisfy: 0.79<(EP01+CP1) / (D1s-d1s)<1.

15.

13. The optical imaging system according to claim 1, characterized in that: The curvature radius R4 of the image side surface of the second lens, the outer diameter D2m of the image side surface of the second spacer element, and the inner diameter d2m of the image side surface of the second spacer element satisfy: -13.30 <R4 / (D2m-d2m)<-3.50。 14. The optical imaging system according to claim 1, characterized in that: The sum of the air gaps ΣAT between any two adjacent lenses with optical power in the optical imaging system on the optical axis and the sum of the maximum thicknesses ΣCP of each spacing element in the optical imaging system along the optical axis direction satisfy: 1.35<(L-∑AT) / ∑CP<2.

90.

15. The optical imaging system according to any one of claims 1 to 14, characterized in that: The lens barrel comprises an object side boss structure and an image side boss structure, wherein the object side boss structure and the image side boss structure protrude outward from the outer peripheral surface of the lens barrel at the object side end and the image side end of the lens barrel respectively, and the object side boss structure and the image side boss structure form a groove with the outer peripheral surface of the lens barrel located therebetween, and the groove is used for assembling the module connector.

16. A camera module, characterized in that: include: An optical imaging system as claimed in any one of claims 1 to 15, and a module driver for driving the optical imaging system.

Images