CN110646925A - Optical imaging lens - Google Patents

Abstract

The application discloses an optical imaging lens, it includes from the object side to the image side along the optical axis in proper order: the image side surface of the first lens is a concave surface; a second lens having a negative refractive power, the object-side surface of which is convex; a third lens having optical power; the fourth lens with positive focal power has a convex object-side surface and a convex image-side surface; a fifth lens element with negative refractive power, the object-side surface of which is concave and the image-side surface of which is concave; the optical imaging lens satisfies the following relation: TTL/ImgH is less than or equal to 1.41; r10/f5 > -0.6; T45/CT5 is more than 0.3 and less than 0.8; wherein, TTL is a distance on the optical axis from the object side surface of the first lens to the imaging surface of the optical imaging lens, ImgH is a half of a diagonal length of an effective pixel area on the imaging surface, f5 is an effective focal length of the fifth lens, R10 is a radius of curvature of the image side surface of the fifth lens, T45 is a distance between the fourth lens and the fifth lens on the optical axis, and CT5 is a center thickness of the fifth lens on the optical axis.

Description

Optical imaging lens

Technical Field

The present application relates to the field of optical elements, and more particularly, to an optical imaging lens.

Background

In recent years, with the development of scientific technology, the imaging quality of optical imaging lenses mounted on consumer electronics such as mobile phones is higher and higher.

Since products such as cellular phones are expected to have a small size, particularly, a thin thickness, the size of an optical imaging lens provided thereon is also limited. When designing the optical imaging lens, the optical imaging lens with small size and good imaging quality can be manufactured without simply scaling down the optical imaging lens with good imaging quality in equal proportion. In addition, the market looks at the appearance of consumer electronic products, for example, mobile phones with a large screen duty ratio are desired. This places severe demands on the head size of the optical imaging lens.

In order to satisfy the miniaturization demand and satisfy the imaging requirement, an optical imaging lens that can give consideration to miniaturization of a lens head, a depth of the lens head, and high imaging quality is required.

Disclosure of Invention

In one aspect, the present application provides an optical imaging lens, in order from an object side to an image side along an optical axis, comprising: the image side surface of the first lens with positive focal power can be a concave surface; a second lens with negative focal power, wherein the object side surface of the second lens can be a convex surface; a third lens having optical power; the object side surface of the fourth lens can be a convex surface, and the image side surface of the fourth lens can be a convex surface; the object side surface of the fifth lens with negative focal power can be a concave surface, and the image side surface of the fifth lens can be a concave surface.

In one embodiment, the optical imaging lens may satisfy the following relationship: TTL/ImgH is less than or equal to 1.41; wherein, TTL is a distance on the optical axis from the object side surface of the first lens element to the imaging surface of the optical imaging lens, and ImgH is half of a diagonal length of the effective pixel area on the imaging surface.

In one embodiment, the optical imaging lens may satisfy the following relationship: r10/f5 > -0.6; where f5 is the effective focal length of the fifth lens, and R10 is the radius of curvature of the image-side surface of the fifth lens.

In one embodiment, the optical imaging lens may satisfy the following relationship: T45/CT5 is more than 0.3 and less than 0.8; where T45 is the separation distance of the fourth lens and the fifth lens on the optical axis, and CT5 is the center thickness of the fifth lens on the optical axis.

In one embodiment, the object side surface of the second lens can be convex.

In one embodiment, the optical imaging lens further includes: a lens barrel; and a first lens, a second lens, a third lens, a fourth lens and a fifth lens arranged in the lens barrel; wherein an outer diameter of the lens barrel at the object side end is smaller than an outer diameter of the lens barrel at the image side end.

In one embodiment, an inner wall surface of the lens barrel includes at least two steps, and an inner diameter of the inner wall surface increases from an object side end to an image side end.

In one embodiment, the outer surface of the inactive area of the second lens may be a sandblasted layer or a grooved surface.

In one embodiment, adjacent steps have a step difference, and a step corresponding to the fourth lens and a step corresponding to the third lens may have the largest step difference; the optical imaging lens further comprises at least two spacing sheets arranged between the third lens and the fourth lens, and the two spacing sheets can comprise at least one metal spacing ring.

In one embodiment, the two spacer sheets may include at least one plastic spacer sheet therein.

In one embodiment, the optical imaging lens further includes a pressing ring disposed in an image-side direction of the fifth lens.

In one embodiment, an on-axis distance SAG41 from an intersection point of an object-side surface of the fourth lens and the optical axis to an effective radius vertex of the object-side surface of the fourth lens and an on-axis distance SAG42 from an intersection point of an image-side surface of the fourth lens and the optical axis to an effective radius vertex of the image-side surface of the fourth lens may satisfy 0 < SAG41/SAG42 ≦ 0.47.

In one embodiment, the sum Σ AT of the distance TTL on the optical axis from the object side surface of the first lens to the imaging surface of the optical imaging lens and the separation distance on the optical axis of any two adjacent lenses having optical powers of the first lens to the fifth lens may satisfy 3.8 < TTL/∑ AT ≦ 4.6.

In one embodiment, a sum Σ AT of the distance of separation on the optical axis of any adjacent two lenses having power of the first to fifth lenses, a distance T12 of separation on the optical axis of the first and second lenses, and a distance T45 of separation on the optical axis of the fourth and fifth lenses may satisfy 0 < (T12+ T45)/∑ AT < 0.5.

In one embodiment, the combined focal length f12 of the first and second lenses and the total effective focal length f of the optical imaging lens may satisfy 1 < f12/f < 1.6.

In one embodiment, the effective focal length f1 of the first lens and the total effective focal length f of the optical imaging lens can satisfy 0.6 < f1/f < 1.2.

In one embodiment, the effective focal length f2 of the second lens, the radius of curvature of the object-side surface R3 of the second lens, and the radius of curvature of the image-side surface R4 of the third lens may satisfy-1.3 < (R3+ R4)/f2 < -0.3.

In one embodiment, the effective focal length f4 of the fourth lens and the total effective focal length f of the optical imaging lens can satisfy 0.3 < f4/f < 0.9.

In one embodiment, the radius of curvature R1 of the object-side surface of the first lens and the radius of curvature R2 of the image-side surface of the first lens may satisfy 0 < | R1/R2| < 0.4.

In one embodiment, the radius of curvature R7 of the object-side surface of the fourth lens and the radius of curvature R8 of the image-side surface of the fourth lens may satisfy 0.6 < (R7+ R8)/(R7-R8) < 1.2.

In one embodiment, a central thickness CT3 of the third lens on the optical axis and a central thickness CT4 of the fourth lens on the optical axis may satisfy 0.2 < CT3/CT4 < 1.

In another aspect, the present application provides an optical imaging lens, including: a lens barrel; and a first lens, a second lens, a third lens, a fourth lens and a fifth lens arranged in the lens barrel; wherein an outer diameter of the lens barrel at the object side end is smaller than an outer diameter of the lens barrel at the image side end; the inner wall surface of the lens barrel includes at least two steps, and the inner diameter of the inner wall surface is increased from the object side end to the image side end.

This application has adopted five lens, through the focal power of rational distribution each lens, face type, the center thickness of each lens and the epaxial interval between each lens etc for above-mentioned optical imaging lens has at least one beneficial effect such as head miniaturization, head depth are dark and imaging quality height.

Drawings

Other features, objects, and advantages of the present application will become more apparent from the following detailed description of non-limiting embodiments when taken in conjunction with the accompanying drawings. In the drawings:

fig. 1 shows a schematic structural diagram of an optical imaging lens according to an embodiment of the present application;

fig. 2 shows a schematic structural view of an optical imaging lens according to embodiment 1 of the present application; fig. 3A to 3D show an on-axis chromatic aberration curve, an astigmatic curve, a distortion curve, and a chromatic aberration of magnification curve, respectively, of the optical imaging lens of embodiment 1;

fig. 4 is a schematic structural view showing an optical imaging lens according to embodiment 2 of the present application; fig. 5A to 5D show an on-axis chromatic aberration curve, an astigmatic curve, a distortion curve, and a chromatic aberration of magnification curve, respectively, of the optical imaging lens of embodiment 2;

fig. 6 is a schematic structural view showing an optical imaging lens according to embodiment 3 of the present application; fig. 7A to 7D show an on-axis chromatic aberration curve, an astigmatic curve, a distortion curve, and a chromatic aberration of magnification curve, respectively, of the optical imaging lens of embodiment 3;

fig. 8 is a schematic structural view showing an optical imaging lens according to embodiment 4 of the present application; fig. 9A to 9D show an on-axis chromatic aberration curve, an astigmatic curve, a distortion curve, and a chromatic aberration of magnification curve, respectively, of the optical imaging lens of embodiment 4;

fig. 10 is a schematic structural view showing an optical imaging lens according to embodiment 5 of the present application; fig. 11A to 11D show an on-axis chromatic aberration curve, an astigmatic curve, a distortion curve, and a chromatic aberration of magnification curve, respectively, of the optical imaging lens of embodiment 5;

fig. 12 is a schematic structural view showing an optical imaging lens according to embodiment 6 of the present application; fig. 13A to 13D show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a chromatic aberration of magnification curve, respectively, of the optical imaging lens of embodiment 6;

fig. 14 is a schematic structural view showing an optical imaging lens according to embodiment 7 of the present application; fig. 15A to 15D show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a chromatic aberration of magnification curve, respectively, of an optical imaging lens of embodiment 7;

fig. 16 is a schematic structural view showing an optical imaging lens according to embodiment 8 of the present application; fig. 17A to 17D show an axial chromatic aberration curve, an astigmatism curve, a distortion curve, and a chromatic aberration of magnification curve, respectively, of the optical imaging lens of embodiment 8.

Detailed Description

For a better understanding of the present application, various aspects of the present application will be described in more detail with reference to the accompanying drawings. It should be understood that the detailed description is merely illustrative of exemplary embodiments of the present application and does not limit the scope of the present application in any way. Like reference numerals refer to like elements throughout the specification. The expression "and/or" includes any and all combinations of one or more of the associated listed items.

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

In the drawings, the thickness, size, and shape of the lens have been slightly exaggerated for convenience of explanation. In particular, the shapes of the spherical or aspherical surfaces shown in the drawings are shown by way of example. That is, the shape of the spherical surface or the aspherical surface is not limited to the shape of the spherical surface or the aspherical surface shown in the drawings. The figures are purely diagrammatic and not drawn to scale.

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

It will be further understood that the terms "comprises," "comprising," "has," "having," "includes" and/or "including," when used in this specification, specify the presence of stated features, elements, and/or components, but do not preclude the presence or addition of one or more other features, elements, components, and/or groups thereof. Moreover, when a statement such as "at least one of" appears after a list of listed features, the entirety of the listed features is modified rather than modifying individual elements in the list. Furthermore, when describing embodiments of the present application, the use of "may" mean "one or more embodiments of the present application. Also, the term "exemplary" is intended to refer to an example or illustration.

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

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.

The optical imaging lens according to an exemplary embodiment of the present application may include, for example, five lenses having optical powers, i.e., a first lens, a second lens, a third lens, a fourth lens, and a fifth lens. The five lenses are arranged in sequence from the object side to the image side along the optical axis. Any adjacent two lenses among the first to fifth lenses may have an air space therebetween. Illustratively, in the first lens to the fifth lens, a lens having no optical power may be disposed between any two adjacent lenses having optical power.

Referring to fig. 1, in an exemplary embodiment, an optical imaging lens of the present application includes a lens barrel 100. The lens barrel 100 includes an object side end 110, an image side end 120, an inner wall surface 130 penetrating the object side end 110 and the image side end 120, and an outer wall surface 140 connecting an outer periphery of the object side end 110 and an outer periphery of the image side end 120. Wherein, understandably, in a plane substantially perpendicular to the optical axis, the direction away from the optical axis is outward.

The inner wall surface 130 of the lens barrel 100 includes at least two steps, and the inner diameter of the inner wall surface 130 increases in the object-side to image-side direction of the optical axis. Specifically, the inner diameter of the step on the image side is larger than the inner diameter of the step on the object side. And each step may comprise a section of face of the same internal diameter (cylindrical face). A first lens E1, a second lens E2, a third lens E3, a fourth lens E4, and a fifth lens E5 are provided in the lens barrel 100, and the inner wall surface 130 of the lens barrel 100 defines an assembly position of each lens. The circumferential surface of any of the first lens E1 to the fifth lens E5 corresponds to one step, for example, the third lens E3 corresponds to the first step of the inner wall surface 130, the fourth lens E4 corresponds to the second step of the inner wall surface 130, and the first lens E1 corresponds to the third step of the inner wall surface 130. In general, a step can be divided into a bearing surface parallel to the optical axis and a connecting surface connecting with an adjacent step, which can be an inclined surface (cone surface) with respect to the optical axis. The bearing surface of the first step and the bearing surface of the second step may have a difference in radius from the optical axis, i.e., a first step difference a.

The outer wall surface 140 of the lens barrel 100 includes a head section 141, the head section 141 extends from the object side end 110 of the lens barrel 100 to the image side end 120 of the lens barrel 100, an outer diameter D of the head section 141 is smaller than an outer diameter of the image side end 120, the head section 141 has a length H parallel to the optical axis direction, and the length H is not smaller than a head depth of the lens barrel 100. Illustratively, the outer diameter D of the head section 141 is also smaller than the effective radius DT41 of the object side of the fourth lens E4.

The application provides an optical imaging lens, the lens barrel 100 has a smaller head and a deeper head depth. The optical imaging lens is suitable for being applied to the screen side of products such as mobile phones and the like, and mobile phones with larger screen occupation ratio can be obtained.

In an exemplary embodiment, the optical imaging lens may further include at least one diaphragm. The stop may be disposed at an appropriate position as needed, for example, between the object side and the first lens E1. For example, a diaphragm is disposed between the object side and the lens barrel 100. Optionally, the optical imaging lens may further include a filter for correcting color deviation and/or a protective glass for protecting a photosensitive element on the imaging surface.

In an exemplary embodiment, the optical imaging lens further includes a plurality of spacers, and each spacer may be disposed between each lens.

In the exemplary embodiment, each adjacent step of the inner wall surface 130 has a step difference, wherein the first step a corresponding to the third lens E3 and the second step corresponding to the fourth lens E4 have the largest step difference a therebetween. By maximizing the first step difference a, the optical imaging lens can maintain the characteristic of a small head.

The optical imaging lens comprises at least two spacing sheets arranged between the third lens E3 and the fourth lens E4 in the plurality of spacing sheets, and at least one metal spacer ring 210 is arranged in the two spacing sheets. By controlling the thickness and structure of the metal space ring 210, the resistance stability of the optical imaging lens is improved.

At least one plastic spacer 220 is included in the two spacers between the third lens E3 and the fourth lens E4. The plastic spacer 220 may be disposed in the object-side direction or the image-side direction of the metal spacer 210, and the thickness and inner diameter of the plastic spacer 220 may be adjusted accordingly. Through setting up suitable plastics spacer 220, be favorable to sheltering from the veiling glare, and then promote optical imaging lens's imaging quality. Illustratively, a metal spacer 230 is further included between the fourth lens E4 and the fifth lens.

In an exemplary embodiment, a pressing ring disposed in an image side direction of the fifth lens E5 is further included. When the pressing ring is not arranged in the image side direction of the fifth lens element E5, the optical imaging lens has fewer parts, is convenient to assemble, and is low in cost. After the pressing ring is arranged, the stability of the assembled optical imaging lens is improved, and the optical imaging lens has reliability.

According to an exemplary embodiment, each of the first through fifth lenses E1 through E5 may have an optically effective area for optical imaging and an optically ineffective area extending outward from the outer circumference of the optically effective area. In general, an optically active area refers to an area of a lens used for optical imaging, and an optically inactive area is a structural area of the lens. During the assembly of the optical imaging lens, the respective lenses may be coupled into the lens barrel 100 at the optically inactive areas of the respective lenses by a process coupling manner such as spot gluing. In the imaging process of the optical imaging lens, the optical effective area of each lens can transmit light from an object to form an optical path, and a final optical image is formed; the optical inactive area of each assembled lens is accommodated in the lens barrel 100 that cannot transmit light, so that the optical inactive area does not directly participate in the imaging process of the optical imaging lens. It should be noted that for ease of description, the present application describes each lens as being divided into two portions, an optically active area and an optically inactive area, but it should be understood that both the optically active area and the optically inactive area of the lens may be formed as one piece during the manufacturing process, rather than as separate two portions.

In the exemplary embodiment, the second lens E2 corresponds to the fourth step of the inner wall surface 130, or the second lens E2 also corresponds to the third step. Illustratively, the outer surface of the inactive area of the second lens E2 is a sandblasted layer or a grooved surface. The optical imaging lens of the present application has a smaller head, so that the wall thickness of the portion of the lens barrel 100 corresponding to the head section 141 is thinner, and the step difference between the fourth step and the third step is smaller. By performing sand blasting or grooving process on the surface of the non-effective area of the second lens E2, a sand blasting layer or a groove-shaped surface for reducing the reflection of the stray light can be obtained, and the stray light reflected and scattered in the inner wall surface 130 can be reduced, so that the imaging quality of the optical imaging lens is improved.

In an exemplary embodiment, the first lens has a positive optical power, and the image-side surface thereof may be concave; the second lens has negative focal power, and the object side surface of the second lens can be a convex surface; the third lens has positive focal power or negative focal power; the fourth lens has positive focal power, and the object side surface of the fourth lens can be a convex surface, and the image side surface of the fourth lens can be a convex surface; the fifth lens element has negative power, and has a concave object-side surface and a concave image-side surface.

In an exemplary embodiment, a distance TTL from an object side surface of the first lens to an imaging surface of the optical imaging lens on an optical axis and a half ImgH of a diagonal length of an effective pixel area on the imaging surface may satisfy a conditional expression TTL/ImgH ≦ 1.41. More specifically, TTL and ImgH can satisfy 1.28 < TTL/ImgH ≦ 1.41. By controlling the ratio of the total optical length to the image height of the optical imaging lens, the structure of the optical imaging lens can be compact.

In an exemplary embodiment, the effective focal length f5 of the fifth lens and the radius of curvature R10 of the image-side surface of the fifth lens satisfy the conditional expression R10/f5 > -0.6. More specifically, f5 and R10 can satisfy-0.58 < R10/f5 < -0.52. By controlling the ratio of the curvature radius of the image side surface of the fifth lens to the effective focal length of the fifth lens, the astigmatism of the optical imaging lens can be effectively controlled, and the imaging quality of an off-axis field of view can be improved.

In an exemplary embodiment, the separation distance T45 between the fourth lens and the fifth lens on the optical axis and the central thickness CT5 of the fifth lens on the optical axis may satisfy the conditional expression: 0.3 < T45/CT5 < 0.8. More specifically, T45 and CT5 satisfy 0.49 < T45/CT5 < 0.56. By controlling the ratio of the air interval in the object-side direction of the fifth lens to the center thickness of the fifth lens, the field curvature contribution amount can be controlled, and the resolution of the optical imaging lens can be effectively improved.

Illustratively, the optical imaging lens of the application can satisfy the conditional expressions of TTL/ImgH ≦ 1.41, -0.58 < R10/f5 < -0.52, and 0.3 < T45/CT5 < 0.8, which is beneficial to making the optical imaging lens have the characteristic of being ultra-thin and has good imaging quality.

In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression 0 < SAG41/SAG42 ≦ 0.47, where SAG41 is an on-axis distance from an intersection of an object-side surface of the fourth lens and the optical axis to an effective radius vertex of the object-side surface of the fourth lens, and SAG42 is an on-axis distance from an intersection of an image-side surface of the fourth lens and the optical axis to an effective radius vertex of the image-side surface of the fourth lens. More specifically, SAG41 and SAG42 can satisfy 0.30 < SAG41/SAG42 ≦ 0.47. The ratio of the rise of the object side surface to the rise of the image side surface of the fourth lens is controlled, so that the shape of the fourth lens is controlled, the processability of the fourth lens is improved, and the resolution of the optical imaging lens is improved.

In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression 3.8 < TTL/∑ AT ≦ 4.6, where TTL is a distance on an optical axis from an object side surface of the first lens to an imaging surface of the optical imaging lens, and Σ AT is a sum of distances on the optical axis between any adjacent two lenses having power among the first lens and the lens closest to the imaging surface. Illustratively, Σ AT — T12+ T23+ T34+ T45. More specifically, TTL and Sigma AT can satisfy 3.92 < TTL/Sigma AT ≦ 4.50. The total length of the optical imaging lens is favorably controlled by controlling the ratio of the total optical length of the optical imaging lens to the sum of the spacing distances of the lenses, so that the optical imaging lens is compact in structure, favorable for better controlling the center thickness of each lens and the spacing distance between each lens, and further better controlling the field curvature, so that the optical imaging lens has better imaging quality.

In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression 0 < (T12+ T45)/∑ AT < 0.5, where Σ AT is a sum of separation distances on an optical axis of any adjacent two lenses having optical powers among the first lens to the lens closest to the imaging surface, T12 is a separation distance on an optical axis of the first lens and the second lens, and T45 is a separation distance on an optical axis of the fourth lens and the fifth lens. Illustratively, Σ AT is the sum of the separation distances on the optical axis of any adjacent two lenses having optical powers of the first lens to the fifth lens. More specifically, Σ AT, T12, and T45 may satisfy 0.20 < (T12+ T45)/∑ AT < 0.26. The sum of the spacing distance between the first lens and the second lens, the spacing distance between the fourth lens and the fifth lens and the spacing distance between each adjacent lens is matched, so that the air space with the position biased to the object side is matched with the air space with the position biased to the image side, the processing characteristics of each lens are ensured, the assembly characteristics of the optical imaging lens are ensured, the field curvature of the optical imaging lens is effectively adjusted, the sensitivity of the optical imaging lens is reduced, and the better imaging quality is obtained.

In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression 1 < f12/f < 1.6, where f12 is a combined focal length of the first lens and the second lens, and f is a total effective focal length of the optical imaging lens. More specifically, f12 and f can satisfy 1.27 < f12/f < 1.47. The ratio of the combined focal length of the first lens and the second lens to the total effective focal length is controlled, so that the spherical aberration contribution of the first lens and the second lens is favorably controlled, and the on-axis field of view of the optical imaging lens has good imaging quality.

In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression 0.6 < f1/f < 1.2, where f1 is an effective focal length of the first lens, and f is a total effective focal length of the optical imaging lens. More specifically, f1 and f can satisfy 0.85 < f1/f < 0.98. By controlling the ratio of the effective focal length of the first lens to the total effective focal length, contribution of third-order spherical aberration and fifth-order spherical aberration of the first lens is favorably reduced, and spherical aberration generated by the first lens is favorably balanced with spherical aberration generated by the lens in the image side direction, so that on-axis aberration is smaller, and the optical imaging system has good imaging quality.

In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression-1.3 < (R3+ R4)/f2 < -0.3, where f2 is an effective focal length of the second lens, R3 is a radius of curvature of an object-side surface of the second lens, and R4 is a radius of curvature of an image-side surface of the third lens. More specifically, f2, R3 and R4 may satisfy-1.05 < (R3+ R4)/f2 < -0.55. By matching the curvature radius of the object side surface of the second lens, the effective focal length of the second lens and the curvature radius of the image side surface of the second lens, the high-grade spherical aberration contributed by the second lens to the optical imaging lens is favorably controlled, and the optical imaging lens has good imaging quality.

In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression 0.3 < f4/f < 0.9, where f4 is an effective focal length of the fourth lens, and f is a total effective focal length of the optical imaging lens. More specifically, f4 and f can satisfy 0.52 < f4/f < 0.65. The ratio of the effective focal length to the total effective focal length of the fourth lens is controlled, so that the spherical aberration contribution amount of the fourth lens is controlled, the optical imaging lens has smaller spherical aberration, and the on-axis view field has good imaging quality.

In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression 0 < | R1/R2| < 0.4, where R1 is a radius of curvature of an object-side surface of the first lens and R2 is a radius of curvature of an image-side surface of the first lens. More specifically, R1 and R2 can satisfy 0.17 < | R1/R2| < 0.36. By controlling the ratio of the curvature radii of the two side surfaces of the first lens, the shape of the first lens can be controlled, and the contribution amount of the first lens to the spherical aberration of the optical imaging lens can be effectively controlled, so that the optical imaging lens has better resolution.

In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression 0.6 < (R7+ R8)/(R7-R8) < 1.2, where R7 is a radius of curvature of an object-side surface of the fourth lens and R8 is a radius of curvature of an image-side surface of the fourth lens. More specifically, R7 and R8 may satisfy 0.85 < (R7+ R8)/(R7-R8) < 1.00. By controlling the curvature radius of the two side surfaces of the fourth lens, the refraction angle of the light beam in the optical imaging lens at the fourth lens can be effectively controlled, so that the optical imaging lens has good processing characteristics.

In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression 0.2 < CT3/CT4 < 1, where CT3 is a central thickness of the third lens on the optical axis, and CT3 and a central thickness CT4 of the fourth lens on the optical axis may satisfy 0.4 < CT3/CT4 < 0.88. By controlling the ratio of the central thicknesses of the third lens and the fourth lens, the contribution amount of the third lens and the fourth lens to the curvature of field can be controlled, and the distortion of the optical imaging lens can be controlled. In addition, make the optical imaging lens of this application be convenient for by the electronic product carrying, alleviate or avoid later stage software debugging.

The optical imaging lens according to the above-described embodiment of the present application may employ a plurality of lenses, for example, five lenses as described above. By reasonably distributing the focal power, the surface type, the central thickness of each lens, the on-axis distance between each lens and the like, the sensitivity of the imaging lens can be effectively reduced, the processability of the imaging lens is improved, the volume of the imaging lens is reduced, and the optical imaging lens has a smaller head, so that the optical imaging lens is more beneficial to production and processing and can be suitable for a mobile phone expected to have a large screen occupation ratio. Simultaneously, the optical imaging lens of this application still possesses the optical property of high image quality.

In the embodiment of the present application, at least one of the mirror surfaces of each lens is an aspherical mirror surface, that is, at least one of the object-side surface of the first lens to the image-side surface of the fifth lens is an aspherical mirror surface. The aspheric lens is characterized in that: the curvature varies continuously from the center of the lens to the periphery of the lens. Unlike a spherical lens having a constant curvature from the center of the lens to the periphery of the lens, an aspherical lens has better curvature radius characteristics, and has advantages of improving distortion aberration and improving astigmatic aberration. After the aspheric lens is adopted, the aberration generated during imaging can be eliminated as much as possible, thereby improving the imaging quality. Optionally, at least one of an object-side surface and an image-side surface of each of the first lens, the second lens, the third lens, the fourth lens, and the fifth lens is an aspheric mirror surface. Optionally, each of the first, second, third, fourth, and fifth lenses has an object-side surface and an image-side surface that are aspheric mirror surfaces.

However, it will be appreciated by those skilled in the art that the number of lenses constituting an optical imaging lens may be varied to achieve the various results and advantages described in the present specification without departing from the claimed subject matter. For example, although five lenses are exemplified in the embodiment, the optical imaging lens is not limited to include five lenses. The optical imaging lens may also include other numbers of lenses, if desired.

Specific examples of an optical imaging lens applicable to the above-described embodiments are further described below with reference to the drawings.

Example 1

An optical imaging lens according to embodiment 1 of the present application is described below with reference to fig. 2 to 3D. Fig. 2 shows a schematic structural diagram of an optical imaging lens according to embodiment 1 of the present application.

As shown in fig. 1, the optical imaging lens, in order from an object side to an image side along an optical axis, comprises: a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, and a filter E6.

The first lens element E1 has positive power, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens element E2 has negative power, and has a convex object-side surface S3 and a concave image-side surface S4. The third lens element E3 has positive power, and has a concave object-side surface S5 and a convex image-side surface S6. The fourth lens element E4 has positive power, and has a convex object-side surface S7 and a convex image-side surface S8. The fifth lens element E5 has negative power, and has a concave object-side surface S9 and a concave image-side surface S10. Filter E6 has an object side S11 and an image side S12. The optical imaging lens has an imaging surface S13, and light from the object passes through the respective surfaces S1 to S12 in order and is finally imaged on the imaging surface S13. Table 1 shows a basic parameter table of the optical imaging lens of embodiment 1, in which the units of the radius of curvature, the thickness/distance, and the focal length are all millimeters (mm).

TABLE 1

In embodiment 1, the value of the total effective focal length f of the optical imaging lens is 3.45mm, the value of the f-number Fno is 2.08, the value of the on-axis distance TTL from the object side surface S1 to the imaging surface S13 of the first lens E1 is 4.28mm, the value of the half ImgH of the diagonal length of the effective pixel area on the imaging surface S13 is 3.04mm, and the value of the half Semi-FOV of the maximum angle of view is 40.79 °.

In embodiment 1, the object-side surface and the image-side surface of any one of the first lens E1 to the fifth lens E5 are aspheric surfaces, and the surface shape x of each aspheric lens can be defined by, but is not limited to, the following aspheric surface formula:

wherein x is the rise of the distance from the aspheric surface vertex to the aspheric surface vertex when the aspheric surface is at the position with the height of h along the optical axis direction; c is the paraxial curvature of the aspheric surface, c being 1/R (i.e., paraxial curvature c is the inverse of radius of curvature R in table 1 above); k is a conic coefficient; ai is the correction coefficient of the i-th order of the aspherical surface. Table 2 below shows the high-order term coefficients A that can be used for the aspherical mirror surfaces S1 to S10 in example 1₄、A₆、A₈、A₁₀、A₁₂、A₁₄、A₁₆、A₁₈And A₂₀。

Flour mark

A4

A6

A8

A10

A12

A14

A16

A18

A20

S1

-1.4099E-02

2.0187E-01

-1.8409E+00

1.0079E+01

-3.4029E+01

7.1393E+01

-9.0632E+01

6.3742E+01

-1.9096E+01

S2

-1.2416E-01

3.0127E-01

3.2984E-01

-6.5266E+00

3.2548E+01

-9.1689E+01

1.5090E+02

-1.3470E+02

5.0172E+01

S3

-2.1448E-01

5.9131E-01

-1.2450E+00

5.7617E+00

-2.7759E+01

8.3441E+01

-1.4708E+02

1.4050E+02

-5.6502E+01

S4

-1.3671E-01

3.7904E-01

-4.0797E-01

1.4255E+00

-8.2501E+00

2.9806E+01

-6.1011E+01

6.7591E+01

-3.1491E+01

S5

-1.8780E-01

2.8105E-01

-2.7287E+00

1.4800E+01

-5.0392E+01

1.0717E+02

-1.3837E+02

9.9597E+01

-3.0240E+01

S6

-1.4674E-01

6.7366E-02

-5.5745E-01

1.9882E+00

-4.4704E+00

6.3670E+00

-5.5672E+00

2.7387E+00

-5.6564E-01

S7

1.8483E-03

-5.0570E-02

-7.2750E-02

2.0089E-01

-2.2025E-01

1.3463E-01

-4.6022E-02

8.1908E-03

-5.9141E-04

S8

-8.6431E-02

6.1120E-02

-8.5697E-02

1.0091E-01

-4.9264E-02

8.2716E-03

1.0268E-03

-5.1504E-04

4.8034E-05

S9

-3.9294E-01

2.1637E-01

-2.7841E-02

-6.0998E-03

-1.4794E-04

1.2866E-03

-3.7852E-04

4.5273E-05

-2.0390E-06

S10

-2.3152E-01

1.9675E-01

-1.1949E-01

5.0665E-02

-1.4733E-02

2.8113E-03

-3.2996E-04

2.1317E-05

-5.7439E-07

TABLE 2

Fig. 3A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 1, which represents the convergent focus deviation of light rays of different wavelengths after passing through the lens. Fig. 3B shows an astigmatism curve representing a meridional field curvature and a sagittal field curvature of the optical imaging lens of embodiment 1. Fig. 3C shows a distortion curve of the optical imaging lens of embodiment 1, which represents distortion magnitude values corresponding to different image heights. Fig. 3D shows a chromatic aberration of magnification curve of the optical imaging lens of embodiment 1, which represents a deviation of different image heights on the imaging plane after light passes through the lens. As can be seen from fig. 3A to 3D, the optical imaging lens according to embodiment 1 can achieve good imaging quality.

Example 2

An optical imaging lens according to embodiment 2 of the present application is described below with reference to fig. 4 to 5D. In this embodiment and the following embodiments, descriptions of parts similar to those of embodiment 1 will be omitted for the sake of brevity. Fig. 4 shows a schematic structural diagram of an optical imaging lens according to embodiment 2 of the present application.

As shown in fig. 4, the optical imaging lens, in order from an object side to an image side along an optical axis, comprises: a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, and a filter E6.

The first lens element E1 has positive power, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens element E2 has negative power, and has a convex object-side surface S3 and a concave image-side surface S4. The third lens element E3 has positive power, and has a convex object-side surface S5 and a convex image-side surface S6. The fourth lens element E4 has positive power, and has a convex object-side surface S7 and a convex image-side surface S8. The fifth lens element E5 has negative power, and has a concave object-side surface S9 and a concave image-side surface S10. Filter E6 has an object side S11 and an image side S12. The optical imaging lens has an imaging surface S13, and light from the object passes through the respective surfaces S1 to S12 in order and is finally imaged on the imaging surface S13.

In embodiment 2, the value of the total effective focal length f of the optical imaging lens is 3.45mm, the value of the f-number Fno is 2.08, the value of the on-axis distance TTL from the object side surface S1 to the imaging surface S13 of the first lens E1 is 4.28mm, the value of the half ImgH of the diagonal length of the effective pixel area on the imaging surface S13 is 3.04mm, and the value of the half Semi-FOV of the maximum angle of view is 40.80 °.

Table 3 shows a basic parameter table of the optical imaging lens of embodiment 2, in which the units of the radius of curvature, the thickness/distance, and the focal length are all millimeters (mm). Table 4 shows high-order term coefficients that can be used for each aspherical mirror surface in example 2, wherein each aspherical mirror surface type can be defined by formula (1) given in example 1 above.

TABLE 3

Flour mark

A4

A6

A8

A10

A12

A14

A16

A18

A20

S1

-1.3635E-02

1.9052E-01

-1.7850E+00

1.0111E+01

-3.5083E+01

7.5447E+01

-9.7975E+01

7.0386E+01

-2.1499E+01

S2

-1.4425E-01

2.7704E-01

2.5060E-01

-4.8889E+00

2.3945E+01

-6.6710E+01

1.0859E+02

-9.5799E+01

3.5211E+01

S3

-2.0045E-01

5.3029E-01

-1.6283E+00

1.0230E+01

-4.9234E+01

1.4349E+02

-2.4786E+02

2.3429E+02

-9.3628E+01

S4

-1.3936E-01

4.1671E-01

-1.0853E+00

6.7185E+00

-3.1405E+01

9.1734E+01

-1.6212E+02

1.5978E+02

-6.7444E+01

S5

-1.6476E-01

2.1532E-01

-1.7049E+00

8.0556E+00

-2.4173E+01

4.5495E+01

-5.2178E+01

3.3665E+01

-9.3031E+00

S6

-1.4441E-01

6.6283E-02

-5.5053E-01

1.9203E+00

-4.1922E+00

5.7269E+00

-4.7632E+00

2.2150E+00

-4.3375E-01

S7

2.2714E-03

-5.8938E-02

-7.9895E-02

2.5759E-01

-3.1226E-01

2.0568E-01

-7.4864E-02

1.4131E-02

-1.0821E-03

S8

-1.0503E-01

9.5818E-02

-1.4433E-01

1.7571E-01

-1.0469E-01

3.1934E-02

-4.7871E-03

2.5319E-04

5.5380E-06

S9

-3.8691E-01

2.0685E-01

-2.2238E-02

-6.2007E-03

-1.4426E-03

1.9194E-03

-5.1958E-04

6.1003E-05

-2.7502E-06

S10

-2.2786E-01

1.9180E-01

-1.1545E-01

4.8395E-02

-1.3869E-02

2.5968E-03

-2.9676E-04

1.8423E-05

-4.6572E-07

TABLE 4

Fig. 5A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 2, which represents the convergent focus deviation of light rays of different wavelengths after passing through the lens. Fig. 5B shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the optical imaging lens of embodiment 2. Fig. 5C shows a distortion curve of the optical imaging lens of embodiment 2, which represents distortion magnitude values corresponding to different image heights. Fig. 5D shows a chromatic aberration of magnification curve of the optical imaging lens of embodiment 2, which represents a deviation of different image heights on the imaging plane after light passes through the lens. As can be seen from fig. 5A to 5D, the optical imaging lens according to embodiment 2 can achieve good imaging quality.

Example 3

An optical imaging lens according to embodiment 3 of the present application is described below with reference to fig. 6 to 7D. Fig. 6 shows a schematic structural diagram of an optical imaging lens according to embodiment 3 of the present application.

As shown in fig. 6, the optical imaging lens, in order from an object side to an image side along an optical axis, comprises: a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, and a filter E6.

The first lens element E1 has positive power, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens element E2 has negative power, and has a convex object-side surface S3 and a concave image-side surface S4. The third lens element E3 has negative power, and has a convex object-side surface S5 and a concave image-side surface S6. The fourth lens element E4 has positive power, and has a convex object-side surface S7 and a convex image-side surface S8. The fifth lens element E5 has negative power, and has a concave object-side surface S9 and a concave image-side surface S10. Filter E6 has an object side S11 and an image side S12. The optical imaging lens has an imaging surface S13, and light from the object passes through the respective surfaces S1 to S12 in order and is finally imaged on the imaging surface S13.

In embodiment 3, the value of the total effective focal length f of the optical imaging lens is 3.44mm, the value of the f-number Fno is 2.08, the value of the on-axis distance TTL from the object side surface S1 to the imaging surface S13 of the first lens E1 is 4.28mm, the value of the half ImgH of the diagonal length of the effective pixel area on the imaging surface S13 is 3.04mm, and the value of the half Semi-FOV of the maximum angle of view is 40.84 °.

Table 5 shows a basic parameter table of the optical imaging lens of embodiment 3, in which the units of the radius of curvature, the thickness/distance, and the focal length are all millimeters (mm). Table 6 shows high-order term coefficients that can be used for each aspherical mirror surface in example 3, wherein each aspherical mirror surface type can be defined by formula (1) given in example 1 above.

TABLE 5

TABLE 6

Fig. 7A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 3, which represents the convergent focus deviation of light rays of different wavelengths after passing through the lens. Fig. 7B shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the optical imaging lens of embodiment 3. Fig. 7C shows a distortion curve of the optical imaging lens of embodiment 3, which represents distortion magnitude values corresponding to different image heights. Fig. 7D shows a chromatic aberration of magnification curve of the optical imaging lens of embodiment 3, which represents the deviation of different image heights on the imaging plane after light passes through the lens. As can be seen from fig. 7A to 7D, the optical imaging lens according to embodiment 3 can achieve good imaging quality.

Example 4

An optical imaging lens according to embodiment 4 of the present application is described below with reference to fig. 8 to 9D. Fig. 8 shows a schematic structural diagram of an optical imaging lens according to embodiment 4 of the present application.

As shown in fig. 8, the optical imaging lens, in order from an object side to an image side along an optical axis, comprises: a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, and a filter E6.

The first lens element E1 has positive power, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens element E2 has negative power, and has a convex object-side surface S3 and a concave image-side surface S4. The third lens element E3 has negative power, and has a concave object-side surface S5 and a concave image-side surface S6. The fourth lens element E4 has positive power, and has a convex object-side surface S7 and a convex image-side surface S8. The fifth lens element E5 has negative power, and has a concave object-side surface S9 and a concave image-side surface S10. Filter E6 has an object side S11 and an image side S12. The optical imaging lens has an imaging surface S13, and light from the object passes through the respective surfaces S1 to S12 in order and is finally imaged on the imaging surface S13.

In embodiment 4, the value of the total effective focal length f of the optical imaging lens is 3.44mm, the value of the f-number Fno is 2.08, the value of the on-axis distance TTL from the object side surface S1 to the imaging surface S13 of the first lens E1 is 4.28mm, the value of the half ImgH of the diagonal length of the effective pixel area on the imaging surface S13 is 3.04mm, and the value of the half Semi-FOV of the maximum angle of view is 40.85 °.

Table 7 shows a basic parameter table of the optical imaging lens of embodiment 4, in which the units of the radius of curvature, the thickness/distance, and the focal length are all millimeters (mm). Table 8 shows high-order term coefficients that can be used for each aspherical mirror surface in example 4, wherein each aspherical mirror surface type can be defined by formula (1) given in example 1 above.

TABLE 7

Flour mark

A4

A6

A8

A10

A12

A14

A16

A18

A20

S1

-1.2649E-02

1.8766E-01

-1.7851E+00

1.0261E+01

-3.6182E+01

7.9090E+01

-1.0443E+02

7.6288E+01

-2.3713E+01

S2

-1.1029E-01

2.3908E-01

2.0732E-01

-3.5732E+00

1.5965E+01

-4.2239E+01

6.6556E+01

-5.7490E+01

2.0750E+01

S3

-1.9468E-01

4.9000E-01

-1.4776E+00

1.0876E+01

-5.7897E+01

1.8003E+02

-3.2636E+02

3.2051E+02

-1.3204E+02

S4

-1.1681E-01

3.9402E-01

-1.1867E+00

7.8378E+00

-3.6356E+01

1.0502E+02

-1.8400E+02

1.8031E+02

-7.5842E+01

S5

-1.4974E-01

1.3701E-01

-9.4762E-01

4.4787E+00

-1.3539E+01

2.5185E+01

-2.7890E+01

1.6921E+01

-4.2960E+00

S6

-1.4859E-01

-4.7960E-03

3.6843E-02

-1.6653E-01

2.5909E-01

-1.9908E-01

6.5599E-02

9.8726E-03

-8.1980E-03

S7

-1.8971E-03

-8.8788E-02

3.0580E-02

8.3638E-02

-1.6587E-01

1.3616E-01

-5.6603E-02

1.1757E-02

-9.7492E-04

S8

-1.1784E-01

1.1599E-01

-1.5687E-01

1.9271E-01

-1.2671E-01

4.6131E-02

-9.4960E-03

1.0390E-03

-4.7075E-05

S9

-3.7208E-01

1.7868E-01

1.5157E-02

-3.7827E-02

1.4356E-02

-2.7760E-03

3.0182E-04

-1.7412E-05

4.1027E-07

S10

-2.2250E-01

1.8536E-01

-1.1184E-01

4.7469E-02

-1.3899E-02

2.6848E-03

-3.2017E-04

2.1083E-05

-5.8139E-07

TABLE 8

Fig. 9A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 4, which represents the convergent focus deviation of light rays of different wavelengths after passing through the lens. Fig. 9B shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the optical imaging lens of embodiment 4. Fig. 9C shows a distortion curve of the optical imaging lens of embodiment 4, which represents distortion magnitude values corresponding to different image heights. Fig. 9D shows a chromatic aberration of magnification curve of the optical imaging lens of embodiment 4, which represents a deviation of different image heights on the imaging plane after light passes through the lens. As can be seen from fig. 9A to 9D, the optical imaging lens according to embodiment 4 can achieve good imaging quality.

Example 5

An optical imaging lens according to embodiment 5 of the present application is described below with reference to fig. 10 to 11D. Fig. 10 shows a schematic structural diagram of an optical imaging lens according to embodiment 5 of the present application.

As shown in fig. 10, the optical imaging lens, in order from an object side to an image side along an optical axis, comprises: a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, and a filter E6.

The first lens element E1 has positive power, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens element E2 has negative power, and has a convex object-side surface S3 and a concave image-side surface S4. The third lens element E3 has negative power, and has a concave object-side surface S5 and a convex image-side surface S6. The fourth lens element E4 has positive power, and has a convex object-side surface S7 and a convex image-side surface S8. The fifth lens element E5 has negative power, and has a concave object-side surface S9 and a concave image-side surface S10. Filter E6 has an object side S11 and an image side S12. The optical imaging lens has an imaging surface S13, and light from the object passes through the respective surfaces S1 to S12 in order and is finally imaged on the imaging surface S13.

In embodiment 5, the value of the total effective focal length f of the optical imaging lens is 3.44mm, the value of the f-number Fno is 2.08, the value of the on-axis distance TTL from the object side surface S1 to the imaging surface S13 of the first lens E1 is 4.28mm, the value of the half ImgH of the diagonal length of the effective pixel area on the imaging surface S13 is 3.04mm, and the value of the half Semi-FOV of the maximum angle of view is 40.84 °.

Table 9 shows a basic parameter table of the optical imaging lens of embodiment 5, in which the units of the radius of curvature, the thickness/distance, and the focal length are all millimeters (mm). Table 10 shows high-order term coefficients that can be used for each aspherical mirror surface in example 5, wherein each aspherical mirror surface type can be defined by formula (1) given in example 1 above.

TABLE 9

Flour mark

A4

A6

A8

A10

A12

A14

A16

A18

A20

S1

-1.2117E-02

1.7644E-01

-1.6305E+00

9.1507E+00

-3.1646E+01

6.8012E+01

-8.8456E+01

6.3746E+01

-1.9582E+01

S2

-1.0834E-01

2.2008E-01

4.4909E-01

-5.4571E+00

2.4633E+01

-6.6573E+01

1.0738E+02

-9.5058E+01

3.5324E+01

S3

-1.9709E-01

4.7541E-01

-1.0237E+00

7.0475E+00

-3.9657E+01

1.2722E+02

-2.3460E+02

2.3262E+02

-9.6386E+01

S4

-1.1486E-01

3.8262E-01

-1.0057E+00

6.6654E+00

-3.2009E+01

9.5242E+01

-1.7075E+02

1.7042E+02

-7.2733E+01

S5

-1.5056E-01

1.3017E-01

-9.1167E-01

4.3497E+00

-1.3343E+01

2.5211E+01

-2.8342E+01

1.7430E+01

-4.4691E+00

S6

-1.4708E-01

-8.3595E-03

6.4126E-02

-2.5845E-01

4.3133E-01

-3.8709E-01

1.8585E-01

-3.2237E-02

-1.9754E-03

S7

7.8720E-03

-1.7770E-01

3.2425E-01

-4.0644E-01

3.0341E-01

-1.3249E-01

3.4147E-02

-4.9195E-03

3.1007E-04

S8

-1.2166E-01

1.2175E-01

-1.5134E-01

1.7696E-01

-1.1353E-01

4.0449E-02

-8.1297E-03

8.6455E-04

-3.7833E-05

S9

-3.8625E-01

2.1270E-01

-1.9870E-02

-1.7823E-02

7.3722E-03

-1.2430E-03

9.4746E-05

-1.6540E-06

-1.0749E-07

S10

-2.2237E-01

1.8714E-01

-1.1376E-01

4.8466E-02

-1.4217E-02

2.7493E-03

-3.2833E-04

2.1676E-05

-6.0063E-07

Watch 10

Fig. 11A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 5, which represents the convergent focus deviation of light rays of different wavelengths after passing through the lens. Fig. 11B shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the optical imaging lens of embodiment 5. Fig. 11C shows a distortion curve of the optical imaging lens of embodiment 5, which represents distortion magnitude values corresponding to different image heights. Fig. 11D shows a chromatic aberration of magnification curve of the optical imaging lens of embodiment 5, which represents a deviation of different image heights on the imaging surface after light passes through the lens. As can be seen from fig. 11A to 11D, the optical imaging lens according to embodiment 5 can achieve good imaging quality.

Example 6

An optical imaging lens according to embodiment 6 of the present application is described below with reference to fig. 12 to 13D. Fig. 12 is a schematic structural view showing an optical imaging lens according to embodiment 6 of the present application.

As shown in fig. 12, the optical imaging lens, in order from an object side to an image side along an optical axis, comprises: a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, and a filter E6.

The first lens element E1 has positive power, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens element E2 has negative power, and has a convex object-side surface S3 and a concave image-side surface S4. The third lens element E3 has positive power, and has a concave object-side surface S5 and a convex image-side surface S6. The fourth lens element E4 has positive power, and has a convex object-side surface S7 and a convex image-side surface S8. The fifth lens element E5 has negative power, and has a concave object-side surface S9 and a concave image-side surface S10. Filter E6 has an object side S11 and an image side S12. The optical imaging lens has an imaging surface S13, and light from the object passes through the respective surfaces S1 to S12 in order and is finally imaged on the imaging surface S13.

In embodiment 6, the value of the total effective focal length f of the optical imaging lens is 3.40mm, the value of the f-number Fno is 2.07, the value of the on-axis distance TTL from the object side surface S1 to the imaging surface S13 of the first lens E1 is 4.14mm, the value of the half ImgH of the diagonal length of the effective pixel area on the imaging surface S13 is 3.09mm, and the value of the half Semi-FOV of the maximum angle of view is 41.83 °.

Table 11 shows a basic parameter table of the optical imaging lens of embodiment 6, in which the units of the radius of curvature, the thickness/distance, and the focal length are all millimeters (mm). Table 12 shows high-order term coefficients that can be used for each aspherical mirror surface in example 6, wherein each aspherical mirror surface type can be defined by formula (1) given in example 1 above.

TABLE 11

Flour mark

A4

A6

A8

A10

A12

A14

A16

A18

A20

S1

-1.3924E-02

1.5248E-01

-1.3047E+00

6.9326E+00

-2.2721E+01

4.6118E+01

-5.6450E+01

3.8230E+01

-1.1064E+01

S2

-1.2209E-01

2.3775E-01

9.7630E-01

-8.2965E+00

3.2482E+01

-7.9662E+01

1.2034E+02

-1.0198E+02

3.6773E+01

S3

-2.6781E-01

1.0407E+00

-6.1720E+00

4.7122E+01

-2.3454E+02

7.0305E+02

-1.2458E+03

1.2035E+03

-4.8899E+02

S4

-1.4703E-01

5.0575E-01

-1.0274E+00

4.1307E+00

-1.0403E+01

2.1876E+00

4.8997E+01

-9.8765E+01

6.1032E+01

S5

-2.0356E-01

4.5893E-01

-5.0023E+00

3.1790E+01

-1.2259E+02

2.9102E+02

-4.1495E+02

3.2618E+02

-1.0822E+02

S6

-1.5110E-01

-1.0085E-01

5.7502E-01

-2.2709E+00

5.5317E+00

-8.2997E+00

7.5228E+00

-3.7326E+00

7.8559E-01

S7

2.5182E-02

-1.5518E-01

1.5130E-01

-8.8109E-02

5.2970E-03

2.8410E-02

-1.6568E-02

3.7739E-03

-3.1647E-04

S8

-6.4795E-02

-3.1337E-02

6.4225E-02

-2.8076E-02

1.4742E-02

-1.0172E-02

3.8895E-03

-6.9820E-04

4.7607E-05

S9

-3.8735E-01

1.5968E-01

7.5006E-02

-9.1823E-02

4.0024E-02

-9.9854E-03

1.5038E-03

-1.2746E-04

4.6737E-06

S10

-2.3515E-01

1.9695E-01

-1.1711E-01

4.8443E-02

-1.3686E-02

2.5002E-03

-2.7271E-04

1.5509E-05

-3.3033E-07

TABLE 12

Fig. 13A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 6, which represents the convergent focus deviation of light rays of different wavelengths after passing through the lens. Fig. 13B shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the optical imaging lens of embodiment 6. Fig. 13C shows a distortion curve of the optical imaging lens of embodiment 6, which represents distortion magnitude values corresponding to different image heights. Fig. 13D shows a chromatic aberration of magnification curve of the optical imaging lens of embodiment 6, which represents a deviation of different image heights on the imaging surface after light passes through the lens. As can be seen from fig. 13A to 13D, the optical imaging lens according to embodiment 6 can achieve good imaging quality.

Example 7

An optical imaging lens according to embodiment 7 of the present application is described below with reference to fig. 14 to 15D. Fig. 14 shows a schematic structural view of an optical imaging lens according to embodiment 7 of the present application.

As shown in fig. 14, the optical imaging lens, in order from an object side to an image side along an optical axis, comprises: a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, and a filter E6.

The first lens element E1 has positive power, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens element E2 has negative power, and has a convex object-side surface S3 and a concave image-side surface S4. The third lens element E3 has positive power, and has a convex object-side surface S5 and a convex image-side surface S6. The fourth lens element E4 has positive power, and has a convex object-side surface S7 and a convex image-side surface S8. The fifth lens element E5 has negative power, and has a concave object-side surface S9 and a concave image-side surface S10. Filter E6 has an object side S11 and an image side S12. The optical imaging lens has an imaging surface S13, and light from the object passes through the respective surfaces S1 to S12 in order and is finally imaged on the imaging surface S13.

In embodiment 7, the value of the total effective focal length f of the optical imaging lens is 3.44mm, the value of the f-number Fno is 2.08, the value of the on-axis distance TTL from the object-side surface S1 to the imaging surface S13 of the first lens E1 is 4.26mm, the value of the half ImgH of the diagonal length of the effective pixel area on the imaging surface S13 is 3.11mm, and the value of the half Semi-FOV of the maximum angle of view is 41.67 °.

Table 13 shows a basic parameter table of the optical imaging lens of embodiment 7, in which the units of the radius of curvature, the thickness/distance, and the focal length are all millimeters (mm). Table 14 shows high-order term coefficients that can be used for each aspherical mirror surface in example 7, wherein each aspherical mirror surface type can be defined by formula (1) given in example 1 above.

Watch 13

TABLE 14

Fig. 15A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 7, which represents the convergent focus deviation of light rays of different wavelengths after passing through the lens. Fig. 15B shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the optical imaging lens of embodiment 7. Fig. 15C shows a distortion curve of the optical imaging lens of embodiment 7, which represents distortion magnitude values corresponding to different image heights. Fig. 15D shows a chromatic aberration of magnification curve of the optical imaging lens of embodiment 7, which represents a deviation of different image heights on the imaging surface after light passes through the lens. As can be seen from fig. 15A to 15D, the optical imaging lens according to embodiment 7 can achieve good imaging quality.

Example 8

An optical imaging lens according to embodiment 8 of the present application is described below with reference to fig. 16 to 17D. Fig. 16 is a schematic structural diagram showing an optical imaging lens according to embodiment 8 of the present application.

As shown in fig. 16, the optical imaging lens, in order from an object side to an image side along an optical axis, comprises: a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, and a filter E6.

The first lens element E1 has positive power, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens element E2 has negative power, and has a convex object-side surface S3 and a concave image-side surface S4. The third lens element E3 has negative power, and has a convex object-side surface S5 and a concave image-side surface S6. The fourth lens element E4 has positive power, and has a convex object-side surface S7 and a convex image-side surface S8. The fifth lens element E5 has negative power, and has a concave object-side surface S9 and a concave image-side surface S10. Filter E6 has an object side S11 and an image side S12. The optical imaging lens has an imaging surface S13, and light from the object passes through the respective surfaces S1 to S12 in order and is finally imaged on the imaging surface S13.

In embodiment 8, the value of the total effective focal length f of the optical imaging lens is 3.39mm, the value of the f-number Fno is 2.08, the value of the on-axis distance TTL from the object side face S1 to the imaging plane S13 of the first lens E1 is 4.10mm, the value of the half ImgH of the diagonal length of the effective pixel area on the imaging plane S13 is 3.15mm, and the value of the half Semi-FOV of the maximum angle of view is 42.38 °. Table 15 shows a basic parameter table of the optical imaging lens of embodiment 8, in which the units of the radius of curvature, the thickness/distance, and the focal length are all millimeters (mm). Table 16 shows high-order term coefficients that can be used for each aspherical mirror surface in example 8, wherein each aspherical mirror surface type can be defined by formula (1) given in example 1 above.

Watch 15

TABLE 16

Fig. 17A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 8, which represents the convergent focus deviation of light rays of different wavelengths after passing through the lens. Fig. 17B shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the optical imaging lens of embodiment 8. Fig. 17C shows a distortion curve of the optical imaging lens of embodiment 8, which represents distortion magnitude values corresponding to different image heights. Fig. 17D shows a chromatic aberration of magnification curve of the optical imaging lens of embodiment 8, which represents a deviation of different image heights on the imaging surface after light passes through the lens. As can be seen from fig. 17A to 17D, the optical imaging lens according to embodiment 8 can achieve good imaging quality.

In summary, examples 1 to 8 each satisfy the relationship shown in table 17.

Conditional expression (A) example	1	2	3	4	5	6	7	8
									TTL/ImgH	1.41	1.41	1.41	1.41	1.41	1.34	1.37	1.30
R10/f5	-0.54	-0.55	-0.54	-0.54	-0.54	-0.55	-0.57	-0.56
									T45/CT5	0.51	0.52	0.52	0.51	0.50	0.51	0.55	0.50
SAG41/SAG42	0.47	0.46	0.39	0.40	0.40	0.47	0.43	0.31
									TTL/∑AT	3.95	4.05	4.41	4.46	4.48	4.02	4.02	4.02
(T12+T45)/∑AT	0.23	0.24	0.25	0.25	0.25	0.22	0.24	0.22
									f12/f	1.43	1.46	1.35	1.34	1.33	1.36	1.45	1.29
f1/f	0.88	0.92	0.92	0.91	0.91	0.92	0.95	0.97
									(R3+R4)/f2	-1.02	-0.88	-0.73	-0.74	-0.78	-0.76	-0.79	-0.58
f4/f	0.62	0.60	0.55	0.56	0.56	0.64	0.59	0.56
									|R1/R2|	0.18	0.23	0.26	0.26	0.25	0.26	0.26	0.34
(R7+R8)/(R7-R8)	0.98	0.98	0.87	0.87	0.87	0.98	0.98	0.91
									CT3/CT4	0.74	0.68	0.75	0.81	0.85	0.64	0.66	0.41

TABLE 17

The present application also provides an imaging Device, which is provided with an electron sensing element to form an image, wherein the electron sensing element may be a Charge Coupled Device (CCD) or a Complementary Metal Oxide Semiconductor (CMOS). The imaging device may be a stand-alone imaging device such as a digital camera, or may be an imaging module integrated on a mobile electronic device such as a mobile phone. The imaging device is equipped with the optical imaging lens described above.

The above description is only a preferred embodiment of the application and is illustrative of the principles of the technology employed. It will be appreciated by a person skilled in the art that the scope of protection covered by the present application is not limited to the embodiments with a specific combination of the features described above, but also covers other embodiments with any combination of the features described above or their equivalents without departing from the scope of the present application. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.

Claims (10)

1. The optical imaging lens assembly, in order from an object side to an image side along an optical axis, comprises:

the image side surface of the first lens is a concave surface;

a second lens having a negative refractive power, the object-side surface of which is convex;

a third lens having optical power;

the fourth lens with positive focal power has a convex object-side surface and a convex image-side surface;

a fifth lens element with negative refractive power, the object-side surface of which is concave and the image-side surface of which is concave;

the optical imaging lens satisfies the following relational expression:

TTL/ImgH≤1.41；

R10/f5＞-0.6；

0.3＜T45/CT5＜0.8；

wherein TTL is a distance on the optical axis from an object side surface of the first lens element to an imaging surface of the optical imaging lens, ImgH is a half of a diagonal length of an effective pixel area on the imaging surface, f5 is an effective focal length of the fifth lens element, R10 is a radius of curvature of an image side surface of the fifth lens element, T45 is a distance between the fourth lens element and the fifth lens element on the optical axis, and CT5 is a center thickness of the fifth lens element on the optical axis.

2. The optical imaging lens according to claim 1, characterized in that the optical imaging lens further comprises a lens barrel in which the first to fifth lenses are disposed, and wherein:

an outer diameter of the lens barrel at an object side end is smaller than an outer diameter of the lens barrel at an image side end.

3. The optical imaging lens according to claim 2,

the inner wall surface of the lens barrel includes at least two steps, and the inner diameter of the inner wall surface is increased from the object side end to the image side end.

4. The optical imaging lens of claim 1, wherein the outer surface of the inactive area of the second lens is a sand blast or a grooved surface.

5. The optical imaging lens according to claim 1, wherein adjacent steps have a step difference, and a step corresponding to the fourth lens has a step difference which is the largest as compared with a step corresponding to the third lens;

the optical imaging lens comprises at least two spacing pieces arranged between the third lens and the fourth lens, and the two spacing pieces comprise at least one metal spacing ring.

6. The optical imaging lens of claim 5, characterized in that the two spacers comprise at least one plastic spacer.

7. The optical imaging lens of claim 1, further comprising a pressing ring disposed in an image-side direction of the fifth lens.

8. The optical imaging lens of claim 1, wherein an on-axis distance SAG41 from an intersection point of an object-side surface of the fourth lens and the optical axis to a vertex of an effective radius of an object-side surface of the fourth lens and an intersection point of an image-side surface of the fourth lens and the optical axis to a vertex of an effective radius of an image-side surface of the fourth lens satisfies 0 < SAG41/SAG42 ≦ 0.47 for SAG 42.

9. The optical imaging lens according to any one of claims 1 to 8, characterized in that a central thickness CT3 of the third lens on the optical axis and a central thickness CT4 of the fourth lens on the optical axis satisfy 0.2 < CT3/CT4 < 1.

10. An optical imaging lens, comprising:

a lens barrel; and

a first lens, a second lens, a third lens, a fourth lens and a fifth lens arranged in the lens barrel;

wherein an outer diameter of the lens barrel at an object side end is smaller than an outer diameter of the lens barrel at an image side end;

the inner wall surface of the lens barrel includes at least two steps, and the inner diameter of the inner wall surface is increased from the object side end to the image side end.

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