CN219456611U

CN219456611U - Optical imaging lens

Info

Publication number: CN219456611U
Application number: CN202223191690.2U
Authority: CN
Inventors: 高春春; 周雨; 张芳; 赵烈烽; 戴付建
Original assignee: Zhejiang Sunny Optics Co Ltd
Current assignee: Zhejiang Sunny Optics Co Ltd
Priority date: 2022-11-29
Filing date: 2022-11-29
Publication date: 2023-08-01
Anticipated expiration: 2032-11-29

Abstract

The application discloses an optical imaging lens. The optical imaging lens includes: the lens group sequentially comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens which have optical power from an object side to an image side along an optical axis, wherein an air interval is arranged between any two adjacent lenses from the first lens to the sixth lens along the optical axis, and the air interval between the fifth lens and the sixth lens is minimum; at least one spacer element comprising: a first spacer element located on an image side of the first lens and in contact with an image side portion of the first lens; and a lens barrel for accommodating the lens group and the at least one spacer element; the optical imaging lens satisfies: 1.5< R2×(D1s‑d1s)/|R1×(D0s‑d0s)|< 5.0.

Description

Optical imaging lens

Technical Field

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

Background

In recent years, as mobile electronic devices are continuously updated and iterated, related industries are continuously optimized and upgraded, such as the most representative mobile phone industry, are promoted. Meanwhile, as the mobile phone industry is continuously optimized and upgraded to drive the continuous iterative upgrade of the optical imaging lens carried on the mobile phone, the camera shooting technology of the mobile phone has become one of the main factors for improving the competitiveness of the mobile phone.

At present, the ultra-wide angle lens has a shocking look and feel, so that the ultra-wide angle lens becomes one of targets for competing and pursuing of lens manufacturers. However, the size of the first lens in the ultra-wide angle lens in the market is often larger, and the first lens with an aspheric design is also easy to generate internal reflection stray light. Therefore, how to reasonably arrange the structures of each lens, the spacing element and the lens barrel in the optical imaging lens and reasonably set the optical technical parameters of the optical imaging lens, so that the first lens in the wide-angle lens has less internal stray light is one of the difficulties to be solved in the optical imaging field.

Disclosure of Invention

An aspect of the present application provides an optical imaging lens sequentially including a lens group, at least one spacer element, and a barrel for accommodating the lens group and the at least one spacer element from an object side to an image side along an optical axis. The lens group sequentially comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens which have optical power from an object side to an image side along an optical axis, wherein an air interval is arranged between any two adjacent lenses from the first lens to the sixth lens along the optical axis, and the air interval between the fifth lens and the sixth lens is minimum. The at least one spacer element includes a first spacer element located on the image side of the first lens and in contact with the image side portion of the first lens. The optical imaging lens can satisfy: 1.5 < R2× (D1 s-D1 s)/|R1× (D0 s-D0 s) | < 5.0, where R1 is the radius of curvature of the object side of the first lens, R2 is the radius of curvature of the image side of the first lens, D1s is the outer diameter of the object side of the first spacing element, D1s is the inner diameter of the object side of the first spacing element, D0s is the outer diameter of the object side end of the barrel, and D0s is the inner diameter of the object side end of the barrel.

In one embodiment, at least one of the object-side surface of the first lens to the image-side surface of the sixth lens is an aspherical mirror surface.

In one embodiment, the at least one spacer element further comprises a second spacer element located on the image side of the second lens and in contact with the image side portion of the second lens. The optical imaging lens can satisfy: 4.5 < f 2/(d 1m-d2 s). Ltoreq.8.0, where f2 is the effective focal length of the second lens, d1m is the inner diameter of the image side of the first spacer element, and d2s is the inner diameter of the object side of the second spacer element.

In one embodiment, the optical imaging lens may satisfy: -1.5 < (EP 01+ T12)/(r1 + R2) < -0.5, wherein EP01 is a separation distance in a direction along the optical axis of the object side end of the barrel to the object side face of the first separation element, T12 is an air separation of the first lens and the second lens on the optical axis, R1 is a radius of curvature of the object side face of the first lens, and R2 is a radius of curvature of the image side face of the first lens.

In one embodiment, the optical imaging lens may satisfy: 2.0 < R4× (D2 s-D2 s)/(R3× (D1 m-D1 m)) < 4.0, wherein R3 is the radius of curvature of the object-side surface of the second lens, R4 is the radius of curvature of the image-side surface of the second lens, D2s is the outer diameter of the object-side surface of the second spacer element, D2s is the inner diameter of the object-side surface of the second spacer element, D1m is the outer diameter of the image-side surface of the first spacer element, and D1m is the inner diameter of the image-side surface of the first spacer element.

In one embodiment, the at least one spacer element further comprises a third spacer element located on the image side of the third lens and in contact with the image side portion of the third lens. The optical imaging lens can satisfy: 4.5 < |f3/EP12+f4/EP23| < 11.0, wherein f3 is the effective focal length of the third lens, f4 is the effective focal length of the fourth lens, EP12 is the separation distance in the direction along the optical axis of the image side of the first spacer element to the object side of the second spacer element, and EP23 is the separation distance in the direction along the optical axis of the image side of the second spacer element to the object side of the third spacer element.

In one embodiment, the optical imaging lens may satisfy: 6.0 < R4/d2s+R5/d3s < 20.0, wherein R4 is the radius of curvature of the image side of the second lens, R5 is the radius of curvature of the object side of the third lens, d2s is the inner diameter of the object side of the second spacer element, and d3s is the inner diameter of the object side of the third spacer element.

In one embodiment, the optical imaging lens may satisfy: -3.0 < R6/(ep23+cp3+ct2) < -2.0, wherein R6 is the radius of curvature of the image side of the third lens, EP23 is the separation distance in the direction along the optical axis of the image side of the second spacer element to the object side of the third spacer element, CP3 is the maximum thickness of the third spacer element, and CT2 is the central thickness of the second lens on the optical axis.

In one embodiment, the at least one spacer element further comprises a fourth spacer element located on the image side of the fourth lens and in contact with the image side portion of the fourth lens. The optical imaging lens can satisfy: 3.5 < |f4/(EP 34-CT 4) +R7/D4s| < 12.0, where f4 is the effective focal length of the fourth lens, EP34 is the separation distance in the direction along the optical axis of the image side of the third spacer element to the object side of the fourth spacer element, CT4 is the center thickness of the fourth lens on the optical axis, R7 is the radius of curvature of the object side of the fourth lens, and D4s is the outer diameter of the object side of the fourth spacer element.

In one embodiment, the optical imaging lens may satisfy: 4.0 < R8/d4s+T45/CP4 < 11.5, wherein R8 is the radius of curvature of the image side of the fourth lens element, T45 is the air separation of the fourth lens element and the fifth lens element on the optical axis, d4s is the inner diameter of the object side of the fourth spacing element, and CP4 is the maximum thickness of the fourth spacing element.

In one embodiment, the optical imaging lens may satisfy: 16.0 < R7/(EP 23+CT3) < 55.0, wherein R7 is the radius of curvature of the object side surface of the fourth lens, EP23 is the distance from the image side surface of the second spacer element to the object side surface of the third spacer element in the direction along the optical axis, and CT3 is the center thickness of the third lens on the optical axis.

In one embodiment, the at least one spacer element further comprises a fifth spacer element located on the image side of the fifth lens and in contact with the image side portion of the fifth lens. The optical imaging lens can satisfy: 0.5 < EP 45/CT5+|R10|/(D5 s-D5 s) < 1.5, where EP45 is the separation distance in the direction along the optical axis of the image side of the fourth spacer element to the object side of the fifth spacer element, CT5 is the center thickness of the fifth lens on the optical axis, R10 is the radius of curvature of the image side of the fifth lens, D5s is the outer diameter of the object side of the fifth spacer element, and D5s is the inner diameter of the object side of the fifth spacer element.

In one embodiment, the optical imaging lens may satisfy: 5.0 < |f6|/(D5 m-D5 m) + (R11+R12)/CP 5 < 7.5, where f6 is the effective focal length of the sixth lens, D5m is the outer diameter of the image side of the fifth spacer element, D5m is the inner diameter of the image side of the fifth spacer element, R11 is the radius of curvature of the object side of the sixth lens, R12 is the radius of curvature of the image side of the sixth lens, and CP5 is the maximum thickness of the fifth spacer element.

In one embodiment, the optical imaging lens may satisfy: 5.5 < L/(Tan (Semi-FOV) × (D0 m-D0 m)) < 7.5, where L is the distance on the optical axis from the object side end of the barrel to the image side end of the barrel, semi-FOV is half the maximum field angle of the optical imaging lens, D0m is the outer diameter of the image side end of the barrel, and D0m is the inner diameter of the image side end of the barrel.

In the exemplary embodiment of the application, by reasonably arranging six lenses, the air interval between adjacent lenses, at least one interval element and a lens barrel and matching 1.5 < R2 x (D1 s-D1 s)/|R1 x (D0 s-D0 s) | < 5.0, the optical imaging lens can reduce non-imaging light generated by reflection of the first interval element when the incident light rays with a large angle pass through the first lens on the basis of better imaging effect, thereby reducing the generation of stray light and improving the imaging quality.

Drawings

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

fig. 1A and 1B are schematic structural views of an optical imaging lens in two embodiments of example 1, respectively;

fig. 2A to 2D show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve, respectively, of the optical imaging lens of embodiment 1;

fig. 3A and 3B are schematic structural views of an optical imaging lens in two embodiments of example 2, respectively;

fig. 4A to 4D show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve, respectively, of the optical imaging lens of embodiment 2;

Fig. 5A and 5B are schematic structural views of an optical imaging lens in two embodiments of example 3, respectively;

fig. 6A to 6D show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve, respectively, of the optical imaging lens of embodiment 3;

fig. 7A and 7B are schematic structural views of an optical imaging lens in two embodiments of example 4, respectively;

fig. 8A to 8D show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve, respectively, of the optical imaging lens of embodiment 4;

FIG. 9 is a partial parametric schematic of an optical imaging lens according to an embodiment of the present application; and

fig. 10 is a schematic view of a part of an optical path in an optical imaging lens according to an embodiment of the present application.

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 these detailed description are merely illustrative of exemplary embodiments of the application and are not intended to limit the scope of the 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 the present 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 feature. Thus, a first lens discussed below may also be referred to as a second lens or a third lens, and a first spacer element may also be referred to as a second spacer element or a third spacer element, without departing from the teachings of the present application.

In the drawings, the thickness, size, and shape of the lenses have been slightly exaggerated for convenience of explanation. In particular, the spherical or aspherical shape shown in the drawings is shown by way of example. That is, the shape of the spherical or aspherical surface is not limited to the shape of the spherical or aspherical surface shown in the drawings. The figures are merely examples and are not drawn to scale. It should be understood that the thickness, size and shape of the spacing element and the lens barrel have also been slightly exaggerated in the drawings for convenience of explanation.

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, then 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 referred to as the object side of the lens, and the surface of each lens closest to the imaging plane is referred to as the image side of the lens. It will be appreciated that the surface of each spacer element closest to the subject is referred to as the object side of the spacer element, and the surface of each spacer element closest to the imaging plane is referred to as the image side of the spacer element. The surface of the lens barrel closest to the object is referred to as the object side end of the lens barrel, and the surface of the lens barrel closest to the imaging surface is referred to as the image side end of the lens barrel.

It will be further understood that the terms "comprises," "comprising," "includes," "including," "having," "containing," 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. Furthermore, when a statement such as "at least one of the following" appears after a list of features that are listed, the entire listed feature is modified instead of modifying a separate element in the list. Furthermore, when describing embodiments of the present application, use of "may" means "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, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other. The following examples merely represent a few embodiments of the present application, which are described in more detail and are not to be construed as limiting the scope of the present application. It should be noted that, for those skilled in the art, several modifications and improvements may be made without departing from the concept of the present application, which are all within the scope of protection of the present application, for example, the lens group (i.e., the first lens to the sixth lens) in each embodiment of the present application, the lens barrel structure, and the spacer element may be arbitrarily combined, and the lens group in one embodiment is not limited to be combined with the lens barrel structure, the spacer element, and the like of the embodiment. The present application will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

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

The optical imaging lens according to the exemplary embodiment of the present application may include six lenses having optical power, which are a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens, respectively. The six lenses are arranged in order from the object side to the image side along the optical axis. Any two adjacent lenses from the first lens to the sixth lens can have a spacing distance therebetween.

According to an exemplary embodiment of the present application, each of the first to sixth lenses may have an optical region for optical imaging and a non-optical region extending outward from an outer periphery of the optical region. In general, an optical region refers to a region of a lens for optical imaging, and a non-optical region is a structural region of the lens. In the assembly process of the optical imaging lens, a spacer member may be provided at a non-optical region of each lens by a process such as spot-gluing and the like and each lens may be coupled into a lens barrel, respectively. In the imaging process of the optical imaging lens, the optical area of each lens can transmit light from an object to form an optical path, so that a final optical image is formed; the non-optical areas of the assembled lenses are accommodated in the lens barrel which cannot transmit light, so that the non-optical areas do 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 the individual lenses as being divided into two parts, an optical region and a non-optical region, but it should be understood that both the optical region and the non-optical region of the lens may be formed as a single piece during manufacture rather than as separate two parts.

The optical imaging lens according to an exemplary embodiment of the present application may include five spacing elements respectively located between the first lens to the sixth lens, which are respectively a first spacing element, a second spacing element, a third spacing element, a fourth spacing element, and a fifth spacing element. In particular, the optical imaging lens may include a first spacer element between the first lens and the second lens, which may rest against a non-optical region of an image side of the first lens; a second spacing element between the second lens and the third lens, which can rest against a non-optical region of an image side of the second lens; a third spacer element positioned between the third lens and the fourth lens, which can abut against a non-optical region of an image side surface of the third lens; a fourth spacing element between the fourth lens and the fifth lens, which can rest on a non-optical region of an image side surface of the fourth lens; a fifth spacing element located between the fifth lens and the sixth lens, which may abut against a non-optical region of the image side of the fifth lens. For example, the first spacer element may be in contact with the non-optical region of the image side of the first lens and may be in contact with the non-optical region of the object side of the second lens. For example, the object-side surface of the first spacer element may be in contact with the non-optical region of the image-side surface of the first lens element, the image-side surface of the first spacer element may be in contact with the non-optical region of the object-side surface of the second lens element, and so on, the object-side surface of the fifth spacer element may be in contact with the non-optical region of the image-side surface of the fifth lens element, and the image-side surface of the fifth spacer element may be in contact with the non-optical region of the object-side surface of the sixth lens element.

An optical imaging lens according to an exemplary embodiment of the present application may include a barrel accommodating a lens group and at least one spacer element. As illustrated in fig. 1A and 1B, the lens barrel may be an integrated lens barrel for accommodating first to sixth lenses and first to fifth spacing elements, for example.

According to the exemplary embodiment of the application, the spacing element can comprise at least one spacing piece, and the number, the thickness, the inner diameter and the outer diameter of the spacing pieces are reasonably arranged, so that the assembly of the optical imaging lens is improved, stray light is shielded, and the imaging quality of the optical imaging lens is improved.

In an exemplary embodiment, any adjacent two lenses among the first to sixth lenses have an air space therebetween along the optical axis, and the air space between the fifth and sixth lenses is the smallest. The optical imaging lens according to the present application can satisfy: 1.5 < R2× (D1 s-D1 s)/|R1× (D0 s-D0 s) | < 5.0, where R1 is the radius of curvature of the object side of the first lens, R2 is the radius of curvature of the image side of the first lens, D1s is the outer diameter of the object side of the first spacing element, D1s is the inner diameter of the object side of the first spacing element, D0s is the outer diameter of the object side end of the barrel, and D0s is the inner diameter of the object side end of the barrel. In the application, through the reasonable arrangement of the six lenses, the air interval between the adjacent lenses, at least one interval element and the lens barrel and the matching of 1.5 < R2× (D1 s-D1 s)/|R1× (D0 s-D0 s) | < 5.0, the optical imaging lens can enable the incident light rays with a large angle to pass through the first lens on the basis of better imaging effect, and the non-imaging light rays generated by the reflection of the first interval element can be reduced, so that the generation of stray light is reduced, and the imaging quality is improved.

In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 4.5 < f 2/(d 1m-d2 s). Ltoreq.8.0, where f2 is the effective focal length of the second lens, d1m is the inner diameter of the image side of the first spacer element, and d2s is the inner diameter of the object side of the second spacer element. The ratio of the effective focal length of the second lens to the inner diameters of the first interval element and the second interval element can be controlled to ensure that the light flux loss of light rays passing through the first interval element, the second lens and the second interval element is in a reasonable interval, thereby being beneficial to improving the integral imaging index of the lens.

In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: -1.5 < (EP 01+ T12)/(r1 + R2) < -0.5, wherein EP01 is a separation distance in a direction along the optical axis of the object side end of the barrel to the object side face of the first separation element, T12 is an air separation of the first lens and the second lens on the optical axis, R1 is a radius of curvature of the object side face of the first lens, and R2 is a radius of curvature of the image side face of the first lens. Satisfies that-1.5 < (EP 01+T12)/(R1+R2) < -0.5, the object side surface of the first lens can not exceed the object side end of the lens barrel by controlling the ratio of the curvature radius of each surface of the first lens to the relevant structural dimension of the first lens in the optical axis direction, thereby being beneficial to reducing the problem of the appearance damage of the object side surface of the first lens, simultaneously being beneficial to controlling the bending degree of the optical area of the first lens, improving the formability of the first lens and further being beneficial to improving the processability of the optical imaging lens.

In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 2.0 < R4× (D2 s-D2 s)/(R3× (D1 m-D1 m)) < 4.0, wherein R3 is the radius of curvature of the object-side surface of the second lens, R4 is the radius of curvature of the image-side surface of the second lens, D2s is the outer diameter of the object-side surface of the second spacer element, D2s is the inner diameter of the object-side surface of the second spacer element, D1m is the outer diameter of the image-side surface of the first spacer element, and D1m is the inner diameter of the image-side surface of the first spacer element. Satisfies R4 x (D2 s-D2 s)/(R3 x (D1 m-D1 m)) < 4.0, and the relative sizes of the first spacing element, the second spacing element and the second lens related to the first spacing element can be reasonably designed by controlling the ratio of the curvature radius of each surface of the second lens to the difference value of the inner diameter and the outer diameter of the first spacing element and the second spacing element, thereby being beneficial to improving the stability of lens assembly and improving the product yield.

In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 4.5 < |f3/EP12+f4/EP23| < 11.0, wherein f3 is the effective focal length of the third lens, f4 is the effective focal length of the fourth lens, EP12 is the separation distance in the direction along the optical axis of the image side of the first spacer element to the object side of the second spacer element, and EP23 is the separation distance in the direction along the optical axis of the image side of the second spacer element to the object side of the third spacer element. Satisfying 4.5 < |f3/EP12+f4/EP23| < 11.0, the quality of light rays formed after passing through the first lens and the second lens when passing through the third lens and the fourth lens can be improved by controlling the ratio of the effective focal length of the third lens to the interval between the first interval element and the second interval element and the interval between the effective focal length of the fourth lens and the second interval element and the interval between the fourth interval element, thereby improving the final imaging quality.

In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 6.0 < R4/d2s+R5/d3s < 20.0, wherein R4 is the radius of curvature of the image side of the second lens, R5 is the radius of curvature of the object side of the third lens, d2s is the inner diameter of the object side of the second spacer element, and d3s is the inner diameter of the object side of the third spacer element. Satisfying 6.0 < R4/d2s+R5/d3s < 20.0, it is possible to ensure that light has sufficient light passing through the second lens to the third lens while also contributing to a reduction in the generation of non-imaging light by controlling the ratio of the radii of curvature of the second and third lenses to the inner diameter of the sides of the adjacent spacer elements. The arrangement of the lens can improve the imaging performance of the lens, reduce the generation of stray light and improve the imaging quality of the lens.

In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: -3.0 < R6/(ep23+cp3+ct2) < -2.0, wherein R6 is the radius of curvature of the image side of the third lens, EP23 is the separation distance in the direction along the optical axis of the image side of the second spacer element to the object side of the third spacer element, CP3 is the maximum thickness of the third spacer element, and CT2 is the central thickness of the second lens on the optical axis. Satisfies R6/(EP 23+CP3+CT2) < -2.0, and can ensure that light rays can be rapidly refracted to the fourth lens after passing through the third lens by controlling the ratio of the curvature radius of the image side surface of the third lens to the relevant axial dimension, thereby being beneficial to reducing the axial dimension of the lens and improving the product competitiveness of the lens.

In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 3.5 < |f4/(EP 34-CT 4) +R7/D4s| < 12.0, where f4 is the effective focal length of the fourth lens, EP34 is the separation distance in the direction along the optical axis of the image side of the third spacer element to the object side of the fourth spacer element, CT4 is the center thickness of the fourth lens on the optical axis, R7 is the radius of curvature of the object side of the fourth lens, and D4s is the outer diameter of the object side of the fourth spacer element. Satisfies 3.5 < |f4/(EP 34-CT 4) +R7/D4s| < 12.0, and can reasonably control the light refraction at the fourth lens by controlling the ratio of the effective focal length of the fourth lens to the related axial structural dimension and the ratio of the object side surface curvature radius of the fourth lens to the outer diameter of the fourth spacer, and can effectively improve the structural uniformity of the optical areas (namely effective imaging areas) on the two surfaces of the fourth lens, and improve the imaging quality and the processing feasibility of the lens.

In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 4.0 < R8/d4s+T45/CP4 < 11.5, wherein R8 is the radius of curvature of the image side of the fourth lens element, T45 is the air separation of the fourth lens element and the fifth lens element on the optical axis, d4s is the inner diameter of the object side of the fourth spacing element, and CP4 is the maximum thickness of the fourth spacing element. Satisfies 4.0 < R8/d4s+T45/CP4 < 11.5, and can ensure that the transverse (i.e. the direction vertical to the optical axis) dimension and the axial dimension between the fourth lens and the fifth lens are in a reasonable design interval by controlling the ratio of the curvature radius of the image side surface of the fourth lens to the inner diameter of the object side surface of the fourth spacing element and the ratio of the axial relative dimension of the fourth lens and the fifth lens, thereby ensuring that the structural member formed by the fourth lens, the fifth lens and the fourth spacing element has better structural dimension, being beneficial to enhancing the integral assembly stability of the optical imaging lens and improving the product yield.

In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 16.0 < R7/(EP 23+CT3) < 55.0, wherein R7 is the radius of curvature of the object side surface of the fourth lens, EP23 is the distance from the image side surface of the second spacer element to the object side surface of the third spacer element in the direction along the optical axis, and CT3 is the center thickness of the third lens on the optical axis. The ratio of the curvature radius of the object side surface of the fourth lens to the axial dimension related to the third lens can be controlled to ensure that when the light passing through the third lens and refracting to the object side surface of the fourth lens continues to propagate to the image side surface of the fourth lens, the non-imaging light generated by reflection in the fourth lens can be furthest reduced, thereby reducing the stray light phenomenon and improving the imaging quality of the product.

In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 0.5 < EP 45/CT5+|R10|/(D5 s-D5 s) < 1.5, where EP45 is the separation distance in the direction along the optical axis of the image side of the fourth spacer element to the object side of the fifth spacer element, CT5 is the center thickness of the fifth lens on the optical axis, R10 is the radius of curvature of the image side of the fifth lens, D5s is the outer diameter of the object side of the fifth spacer element, and D5s is the inner diameter of the object side of the fifth spacer element. Satisfies 0.5 < EP45/CT5 +|R10|/(D5 s-D5 s) < 1.5, and can effectively balance the uniformity of the whole fifth lens and the reasonable design between the shapes of the effective imaging areas of the image side surface of the fifth lens by controlling the ratio of the axial dimension from the fourth interval element to the fifth interval element to the center thickness of the fifth lens and the difference between the curvature radius of the image side surface of the fifth lens and the inner and outer diameters of the object side of the fifth interval element, thereby ensuring the processability of the whole fifth lens, ensuring the quality of light rays passing through the fifth lens and improving the imaging quality of the whole lens.

In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 5.0 < |f6|/(D5 m-D5 m) + (R11+R12)/CP 5 < 7.5, where f6 is the effective focal length of the sixth lens, D5m is the outer diameter of the image side of the fifth spacer element, D5m is the inner diameter of the image side of the fifth spacer element, R11 is the radius of curvature of the object side of the sixth lens, R12 is the radius of curvature of the image side of the sixth lens, and CP5 is the maximum thickness of the fifth spacer element. Satisfies 5.0 < |f6|/(D5 m-D5 m) + (R11+R12)/CP 5 < 7.5, and can effectively ensure that the light rays transmitted from the first lens to the fifth lens can be better converged to each view field after passing through the sixth lens by controlling the ratio of the effective focal length of the sixth lens to the difference value of the inner diameter and the outer diameter of the image side surface of the fifth spacing element and the ratio of the sum of the curvature radiuses of the two surfaces of the sixth lens to the thickness of the fifth spacing element, thereby improving the imaging quality.

In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 5.5 < L/(Tan (Semi-FOV) × (D0 m-D0 m)) < 7.5, where L is the distance on the optical axis from the object side end of the barrel to the image side end of the barrel, semi-FOV is half the maximum field angle of the optical imaging lens, D0m is the outer diameter of the image side end of the barrel, and D0m is the inner diameter of the image side end of the barrel. Satisfies 5.5 < L/(Tan (Semi-FOV) × (D0 m-D0 m)) < 7.5, and can ensure that incident light has the largest field angle under the condition of a certain lens barrel height by reasonably controlling the relation among the maximum height L of the lens barrel, half of the maximum field angle of the lens and the inner diameter and the outer diameter of the image side end of the lens barrel, thereby not only ensuring the basic optical requirement of the lens, but also realizing the requirement of the lens with the minimum axial size and improving the product competitiveness of the optical imaging lens.

In an exemplary embodiment, the optical imaging lens according to the present application further includes a stop disposed between the second lens and the third lens. Optionally, the optical imaging lens may further include a filter for correcting color deviation and/or a protective glass for protecting a photosensitive element located on the imaging surface. The application provides an optical imaging lens with the characteristics of good assembly stability, high yield, small stray light, large field angle, miniaturization, high imaging quality and the like. The optical imaging lens according to the above embodiment of the present application may employ a plurality of lenses, for example, the above six lenses. Through reasonable distribution of focal power, surface type, material, center thickness and axial spacing among the lenses, incident light can be effectively converged, the total optical length of the imaging lens is reduced, and the processability of the imaging lens is improved, so that the optical imaging lens is more beneficial to production and processing. In the optical imaging lens of the above embodiment of the present application, by arranging the spacing element between adjacent lenses and designing the inner and outer diameters of the spacing element according to the optical path, stray light can be effectively blocked and eliminated, and the imaging quality of the lens can be improved. As shown in fig. 10, a schematic diagram of the path of a portion of light rays, such as ray 100, in an optical imaging lens.

In an embodiment of the present application, at least one of the mirrors of each lens is an aspherical mirror, i.e., at least one of the object side surface of the first lens to the image side surface of the sixth lens is an aspherical mirror. The aspherical 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 a better radius of curvature characteristic, and has advantages of improving distortion aberration and improving astigmatic aberration. By adopting the aspherical lens, aberration occurring at the time of imaging can be eliminated as much as possible, thereby improving 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, the fifth lens, and the sixth lens is an aspherical mirror surface. Optionally, the object side surface and the image side surface of each of the first lens, the second lens, the third lens, the fourth lens, the fifth lens and the sixth lens are aspherical mirror surfaces.

However, it will be appreciated by those skilled in the art that the number of lenses making up the optical imaging lens may be varied to achieve the various results and advantages described in the specification without departing from the technical solutions claimed herein. For example, although six lenses are described as an example in the embodiment, the optical imaging lens is not limited to include six lenses. The optical imaging lens may also include other numbers of lenses, if desired.

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

Example 1

An optical imaging lens according to embodiment 1 of the present application is described below with reference to fig. 1A to 2D. Fig. 1A and 1B show the optical imaging lens in two implementations in example 1, respectively.

As shown in fig. 1A and 1B, the optical imaging lens sequentially includes, from an object side to an image side: the first lens E1, the second lens E2, the stop STO (not shown), the third lens E3, the fourth lens E4, the fifth lens E5, the sixth lens E6, the filter (not shown), and the imaging surface S15 (not shown).

The first lens element E1 has negative refractive power, wherein an object-side surface S1 thereof is concave, and an image-side surface S2 thereof is concave. The second lens element E2 has positive refractive power, wherein an object-side surface S3 thereof is convex, and an image-side surface S4 thereof is concave. The third lens element E3 has positive refractive power, wherein an object-side surface S5 thereof is convex, and an image-side surface S6 thereof is convex. The fourth lens element E4 has negative refractive power, wherein an object-side surface S7 thereof is convex and an image-side surface S8 thereof is concave. The fifth lens element E5 has positive refractive power, wherein an object-side surface S9 thereof is convex, and an image-side surface S10 thereof is convex. The sixth lens element E6 has negative refractive power, wherein an object-side surface S11 thereof is convex and an image-side surface S12 thereof is concave. The filter has an object side surface S13 and an image side surface S14. Light from the object sequentially passes through the respective surfaces S1 to S14 and is finally imaged on the imaging surface S15.

Table 1 shows the basic parameter table of the optical imaging lens of embodiment 1, in which the units of radius of curvature, thickness/distance, and focal length are all millimeters (mm).

TABLE 1

In this example, half of the maximum field angle of the optical imaging lens has a Semi-FOV of 65.1 °.

As shown in fig. 1A and 1B, the optical imaging lens may include a barrel accommodating first to sixth lenses and first to fifth spacing elements. The optical imaging lens may include five spacing elements respectively located between the first lens and the sixth lens, namely a first spacing element P1, a second spacing element P2, a third spacing element P3, a fourth spacing element P4 and a fifth spacing element P5.

Table 2 shows basic parameter tables of each spacer element in two embodiments in the optical imaging lens of example 1, wherein each parameter in table 2 is in millimeters (mm).

TABLE 2

It should be understood that in this example, the structures and parameters of each spacer element are merely exemplified for two embodiments, and the specific structures and actual parameters of each spacer element are not explicitly defined. The specific structure and the actual parameters of the individual spacer elements may be set in any suitable manner in the actual production.

In embodiment 1, the object side surface and the image side surface of any one of the first lens E1 to the sixth lens E6 are aspherical, and the surface profile x of each aspherical lens can be defined by, but not limited to, the following aspherical formula:

wherein x is the distance vector height from the vertex of the aspheric surface when the aspheric surface is at the position with the height h along the optical axis direction; c is the paraxial curvature of the aspheric surface, c=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 aspherical i-th order. The following tables 3-1 and 3-2 give the higher order coefficients A that can be used for each of the aspherical mirror faces S1-S12 in example 1 ₄ 、A ₆ 、A ₈ 、A ₁₀ 、A ₁₂ 、A ₁₄ 、A ₁₆ 、A ₁₈ 、A ₂₀ 、A ₂₂ 、A ₂₄ 、A ₂₆ 、A ₂₈ And A ₃₀ 。

TABLE 3-1

Face number

A18

A20

A22

A24

A26

A28

A30

S1

-2.6347E-04

2.9702E-04

-1.0673E-04

-3.3305E-05

-5.9120E-05

-1.5969E-05

9.0003E-06

S2

5.1057E-04

-9.2022E-04

6.5435E-05

1.9979E-04

-2.4689E-05

-9.8410E-05

2.4685E-05

S3

1.4701E-05

-2.7107E-06

-6.3839E-06

-3.6789E-08

5.8719E-07

1.0054E-06

-3.8689E-07

S4

7.6797E-06

6.3116E-06

-5.8791E-07

-1.6550E-06

-2.9907E-06

-1.7624E-07

4.4716E-07

S5

-1.2725E-05

-5.6971E-06

3.7921E-06

1.0873E-06

7.4087E-09

4.3655E-07

-2.0535E-07

S6

1.8501E-05

7.6870E-07

-2.9747E-05

-1.5279E-05

-1.3826E-05

9.0477E-07

2.0114E-06

S7

-9.4350E-06

-1.9995E-05

1.5003E-05

-9.3468E-06

3.8550E-06

-8.3932E-06

2.6865E-06

S8

-1.2164E-04

2.4462E-05

-4.6469E-05

3.0152E-05

-2.9321E-06

7.9560E-06

-2.1592E-06

S9

-6.0811E-04

-1.9786E-06

-1.0659E-04

5.5278E-05

8.2477E-06

1.7960E-05

-6.2264E-06

S10

-9.4588E-05

-3.8583E-04

-9.8459E-04

1.4462E-04

1.2101E-04

1.0596E-04

-6.1496E-05

S11

3.9853E-04

3.4697E-04

-9.9813E-05

-2.0152E-04

-5.0194E-05

1.9733E-04

-8.4348E-05

S12

1.6909E-03

2.0400E-05

9.6834E-04

2.6795E-04

-2.1101E-05

-6.0733E-05

-1.4424E-04

TABLE 3-2

Fig. 2A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 1, which indicates the deviation of the converging focus after light rays of different wavelengths pass through the lens. Fig. 2B shows an astigmatism curve of the optical imaging lens of embodiment 1, which represents meridional image plane curvature and sagittal image plane curvature. Fig. 2C shows a distortion curve of the optical imaging lens of embodiment 1, which represents distortion magnitude values corresponding to different image heights. Fig. 2D shows a magnification chromatic aberration curve of the optical imaging lens of embodiment 1, which represents the deviation of different image heights on the imaging plane after light passes through the lens. As can be seen from fig. 2A to 2D, the optical imaging lens provided in 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. 3A to 4D. In this embodiment and the following embodiments, descriptions of portions similar to embodiment 1 will be omitted for brevity. Fig. 3A and 3B show the optical imaging lens in two implementations in example 2, respectively.

As shown in fig. 3A and 3B, the optical imaging lens sequentially includes, from an object side to an image side: the first lens E1, the second lens E2, the stop STO (not shown), the third lens E3, the fourth lens E4, the fifth lens E5, the sixth lens E6, the filter (not shown), and the imaging surface S15 (not shown).

The first lens element E1 has negative refractive power, wherein an object-side surface S1 thereof is concave, and an image-side surface S2 thereof is concave. The second lens element E2 has positive refractive power, wherein an object-side surface S3 thereof is convex, and an image-side surface S4 thereof is concave. The third lens element E3 has positive refractive power, wherein an object-side surface S5 thereof is convex, and an image-side surface S6 thereof is convex. The fourth lens element E4 has negative refractive power, wherein an object-side surface S7 thereof is convex and an image-side surface S8 thereof is concave. The fifth lens element E5 has positive refractive power, wherein an object-side surface S9 thereof is concave and an image-side surface S10 thereof is convex. The sixth lens element E6 has negative refractive power, wherein an object-side surface S11 thereof is convex and an image-side surface S12 thereof is concave. The filter has an object side surface S13 and an image side surface S14. Light from the object sequentially passes through the respective surfaces S1 to S14 and is finally imaged on the imaging surface S15.

In this example, half of the maximum field angle of the optical imaging lens has a Semi-FOV of 61.8 °.

As shown in fig. 3A and 3B, the optical imaging lens may include a barrel accommodating first to sixth lenses and first to fifth spacing elements. The optical imaging lens may include five spacing elements respectively located between the first lens and the sixth lens, namely a first spacing element P1, a second spacing element P2, a third spacing element P3, a fourth spacing element P4 and a fifth spacing element P5.

Table 4 shows the basic parameter table of the optical imaging lens of embodiment 2, in which the units of radius of curvature, thickness/distance, and focal length are all millimeters (mm). Table 5 shows basic parameter tables of each spacer element in two embodiments in the optical imaging lens of example 2, wherein each parameter in table 5 is in millimeters (mm). Tables 6-1, 6-2 show the higher order coefficients that can be used for each of the aspherical mirror surfaces in example 2, wherein each of the aspherical surface profiles can be defined by equation (1) given in example 1 above.

TABLE 4 Table 4

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TABLE 5

Face number	A4	A6	A8	A10	A12
						S1	7.3845E-01	-1.4253E-01	1.6146E-02	-5.4841E-03	3.3102E-03
S2	3.3455E-01	-1.3216E-01	1.9590E-02	5.1195E-03	-1.1981E-03
						S3	-4.7379E-02	-3.8865E-03	2.9817E-03	4.6125E-04	-1.6143E-04
S4	1.0935E-02	3.4105E-03	1.6473E-03	4.5971E-04	1.4065E-04
						S5	-1.5588E-02	-5.9922E-05	5.1395E-04	1.2854E-04	-1.0615E-06
S6	-1.2069E-01	-4.4054E-03	2.6012E-04	9.5875E-04	5.2183E-04
						S7	-3.1008E-01	2.7107E-02	-3.0635E-03	-3.3153E-05	-8.5462E-05
S8	-3.9970E-01	8.1733E-02	-1.9361E-02	2.8992E-03	-4.7147E-04
						S9	-6.2833E-02	3.4325E-02	-5.6888E-03	2.7424E-04	-9.8174E-05
S10	2.7179E-01	4.0261E-03	4.7792E-02	-1.7003E-02	4.0038E-04
						S11	-1.1550E+00	3.0316E-01	-2.1110E-02	-2.2558E-02	6.8448E-03
S12	-1.7980E+00	2.8357E-01	-7.4269E-02	2.4778E-02	-1.3178E-02

TABLE 6-1

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TABLE 6-2

Fig. 4A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 2, which indicates the deviation of the converging focus after light rays of different wavelengths pass through the lens. Fig. 4B shows an astigmatism curve of the optical imaging lens of embodiment 2, which represents meridional image plane curvature and sagittal image plane curvature. Fig. 4C shows a distortion curve of the optical imaging lens of embodiment 2, which represents distortion magnitude values corresponding to different image heights. Fig. 4D shows a magnification chromatic aberration curve of the optical imaging lens of embodiment 2, which represents the deviation of different image heights on the imaging plane after light passes through the lens. As can be seen from fig. 4A to 4D, the optical imaging lens provided in 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. 5A to 6D. Fig. 5A and 5B show the optical imaging lens in two implementations in example 3, respectively.

As shown in fig. 5A and 5B, the optical imaging lens sequentially includes, from an object side to an image side: the first lens E1, the second lens E2, the stop STO (not shown), the third lens E3, the fourth lens E4, the fifth lens E5, the sixth lens E6, the filter (not shown), and the imaging surface S15 (not shown).

In this example, half of the maximum field angle of the optical imaging lens has a Semi-FOV of 63.4 °.

As shown in fig. 5A and 5B, the optical imaging lens may include a barrel accommodating first to sixth lenses and first to fifth spacing elements. The optical imaging lens may include five spacing elements respectively located between the first lens and the sixth lens, namely a first spacing element P1, a second spacing element P2, a third spacing element P3, a fourth spacing element P4 and a fifth spacing element P5.

Table 7 shows a basic parameter table of the optical imaging lens of embodiment 3, in which the units of radius of curvature, thickness/distance, and focal length are all millimeters (mm). Table 8 shows basic parameter tables of each spacer element of two embodiments in the optical imaging lens of example 3, wherein each parameter in table 8 is in millimeters (mm). Tables 9-1, 9-2 show the higher order coefficients that can be used for each of the aspherical mirror surfaces in example 3, wherein each of the aspherical surface profiles can be defined by equation (1) given in example 1 above.

TABLE 7

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TABLE 8

Face number

A4

A6

A8

A10

A12

A14

S1

8.3404E-01

-1.6803E-01

2.1999E-02

-5.7578E-03

4.1996E-03

-1.0724E-03

S2

3.7230E-01

-1.4280E-01

1.7951E-02

7.7758E-03

-1.4728E-03

-1.8157E-03

S3

-4.5298E-02

-4.6882E-03

2.9281E-03

5.0409E-04

-1.8366E-04

-9.0547E-05

S4

1.0925E-02

3.1199E-03

1.4404E-03

4.1915E-04

8.7600E-05

2.7291E-05

S5

-1.3236E-02

4.5501E-05

5.8559E-04

1.4936E-04

4.4008E-06

-2.5497E-05

S6

-1.2851E-01

-4.7191E-03

8.2173E-04

1.2394E-03

7.0559E-04

2.8096E-04

S7

-3.1646E-01

1.8966E-02

-1.7008E-03

-1.8277E-04

-1.0558E-05

1.4902E-04

S8

-4.1913E-01

8.4741E-02

-2.0560E-02

2.7080E-03

-2.0096E-04

2.5959E-04

S9

-1.0425E-01

4.9530E-02

-1.1276E-02

2.3502E-03

-5.2460E-04

1.9518E-05

S10

3.4854E-01

1.8794E-02

4.7649E-02

-2.3502E-02

5.0907E-04

-1.8447E-03

S11

-9.1108E-01

2.2080E-01

1.8970E-02

-4.1111E-02

1.3913E-02

-5.6723E-03

S12

-1.6527E+00

2.3250E-01

-5.1619E-02

1.6210E-02

-7.0184E-03

-2.8783E-03

TABLE 9-1

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TABLE 9-2

Fig. 6A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 3, which indicates a convergent focus deviation of light rays of different wavelengths after passing through the lens. Fig. 6B shows an astigmatism curve of the optical imaging lens of embodiment 3, which represents meridional image plane curvature and sagittal image plane curvature. Fig. 6C shows a distortion curve of the optical imaging lens of embodiment 3, which represents distortion magnitude values corresponding to different image heights. Fig. 6D shows a magnification chromatic aberration 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. 6A to 6D, the optical imaging lens provided in embodiment 3 can achieve good imaging quality.

Implementation of the embodimentsExample 4

An optical imaging lens according to embodiment 4 of the present application is described below with reference to fig. 7A to 8D. Fig. 7A and 7B show the optical imaging lens in two implementations in example 4, respectively.

As shown in fig. 7A and 7B, the optical imaging lens sequentially includes, from an object side to an image side: the first lens E1, the second lens E2, the stop STO (not shown), the third lens E3, the fourth lens E4, the fifth lens E5, the sixth lens E6, the filter (not shown), and the imaging surface S15 (not shown).

As shown in fig. 7A and 8B, the optical imaging lens may include a barrel accommodating first to sixth lenses and first to fifth spacing elements. The optical imaging lens may include five spacing elements respectively located between the first lens and the sixth lens, namely a first spacing element P1, a second spacing element P2, a third spacing element P3, a fourth spacing element P4 and a fifth spacing element P5.

Table 10 shows a basic parameter table of the optical imaging lens of example 4, in which the units of radius of curvature, thickness/distance, and focal length are all millimeters (mm). Table 11 shows basic parameter tables of each spacer element of two embodiments in the optical imaging lens of example 4, wherein each parameter in table 11 is in millimeters (mm). Tables 12-1, 12-2 show the higher order coefficients that can be used for each of the aspherical mirror surfaces in example 4, where each of the aspherical surface profiles can be defined by equation (1) given in example 1 above.

Table 10

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TABLE 11

Face number

A4

A6

A8

A10

A12

A14

A16

S1

1.0278E+00

-2.3649E-01

4.9523E-02

-1.0166E-02

7.2688E-03

-2.7120E-03

9.1300E-04

S2

4.4746E-01

-2.0397E-01

4.1920E-02

8.1056E-03

-3.9709E-03

-2.4610E-03

1.8951E-03

S3

-6.5539E-02

-7.0967E-03

3.0038E-03

5.7799E-04

-2.0441E-04

-1.1960E-04

1.2226E-05

S4

3.7187E-03

2.4972E-03

1.4403E-03

4.2329E-04

9.8224E-05

2.3150E-05

1.0416E-05

S5

-6.1221E-03

3.5551E-05

2.3294E-04

1.4693E-04

1.1645E-05

1.0224E-05

-9.2059E-06

S6

-1.0036E-01

-3.1134E-03

-2.9447E-04

1.0745E-03

6.2073E-04

2.6598E-04

9.0989E-05

S7

-2.7024E-01

4.7476E-03

-5.7848E-03

1.6270E-03

3.8594E-04

2.7221E-04

-1.0034E-04

S8

-3.6216E-01

6.2574E-02

-1.3788E-02

3.3302E-03

-1.1656E-03

4.0021E-04

-2.6825E-05

S9

-4.9398E-02

4.2027E-02

-7.5591E-03

-5.2582E-03

6.0619E-04

7.5220E-04

3.2791E-04

S10

7.0574E-01

-3.7079E-02

5.1470E-02

-2.5231E-02

-5.0966E-03

-3.8809E-03

3.2541E-03

S11

-2.4663E+00

5.6969E-01

-1.2165E-01

3.8444E-02

-2.4115E-02

9.5683E-03

-1.5868E-03

S12

-1.8728E+00

2.9206E-01

-1.0003E-01

5.2159E-02

-2.1214E-02

7.6177E-03

-4.7431E-03

TABLE 12-1

TABLE 12-2

Fig. 8A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 4, which indicates a convergent focus deviation of light rays of different wavelengths after passing through the lens. Fig. 8B shows an astigmatism curve of the optical imaging lens of embodiment 4, which represents meridional image plane curvature and sagittal image plane curvature. Fig. 8C shows a distortion curve of the optical imaging lens of embodiment 4, which represents distortion magnitude values corresponding to different image heights. Fig. 8D shows a magnification chromatic aberration curve of the optical imaging lens of embodiment 4, which represents the deviation of different image heights on the imaging plane after light passes through the lens. As can be seen from fig. 8A to 8D, the optical imaging lens provided in embodiment 4 can achieve good imaging quality.

In summary, examples 1 to 4 satisfy the relationships shown in tables 13-1 and 13-2, respectively.

TABLE 13-1

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TABLE 13-2

The present application also provides an imaging device, the electron-sensitive element of which may be a photosensitive coupling element (CCD) or a complementary metal oxide semiconductor element (CMOS). The imaging device may be a stand alone imaging device such as a digital camera or an imaging module integrated on a mobile electronic device such as a cell phone. The imaging device is equipped with the optical imaging lens described above.

The foregoing description is only of the preferred embodiments of the present application and is presented as a description of the principles of the technology being utilized. It will be appreciated by persons skilled in the art that the scope of the invention referred to in this application is not limited to the specific combinations of features described above, but also covers other technical solutions which may be formed by any combination of the features described above or their equivalents without departing from the inventive concept. Such as the above-described features and technical features having similar functions (but not limited to) disclosed in the present application are replaced with each other.

Claims

1. Optical imaging lens, its characterized in that includes:

a lens group including, in order from an object side to an image side along an optical axis, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens having optical power, wherein any adjacent two lenses of the first lens to the sixth lens have an air space therebetween along the optical axis, and the air space between the fifth lens and the sixth lens is minimum;

at least one spacer element comprising: a first spacer element located on an image side of the first lens and in contact with an image side portion of the first lens; and

A lens barrel for accommodating the lens group and the at least one spacer element;

wherein, the optical imaging lens satisfies: 1.5 < R2× (D1 s-D1 s)/|R1× (D0 s-D0 s) | < 5.0, wherein R1 is the radius of curvature of the object side of the first lens, R2 is the radius of curvature of the image side of the first lens, D1s is the outer diameter of the object side of the first spacing element, D1s is the inner diameter of the object side of the first spacing element, D0s is the outer diameter of the object side end of the barrel, and D0s is the inner diameter of the object side end of the barrel.

2. The optical imaging lens of claim 1, wherein said at least one spacer element further comprises a second spacer element located on the image side of said second lens and in contact with the image side portion of said second lens,

the optical imaging lens satisfies the following conditions: 4.5 < f 2/(d 1m-d2 s). Ltoreq.8.0, wherein f2 is the effective focal length of the second lens, d1m is the inner diameter of the image side of the first spacer element, and d2s is the inner diameter of the object side of the second spacer element.

3. The optical imaging lens of claim 1, wherein the optical imaging lens satisfies: -1.5 < (EP 01+ T12)/(r1 + R2) < -0.5, wherein EP01 is the separation distance of the object side end of the barrel to the object side face of the first separation element in the direction along the optical axis, T12 is the air separation of the first lens and the second lens on the optical axis, R1 is the radius of curvature of the object side face of the first lens, and R2 is the radius of curvature of the image side face of the first lens.

4. The optical imaging lens of claim 2, wherein the optical imaging lens satisfies: 2.0 < R4× (D2 s-D2 s)/(R3× (D1 m-D1 m)) < 4.0, wherein R3 is the radius of curvature of the object-side surface of the second lens, R4 is the radius of curvature of the image-side surface of the second lens, D2s is the outer diameter of the object-side surface of the second spacer element, D2s is the inner diameter of the object-side surface of the second spacer element, D1m is the outer diameter of the image-side surface of the first spacer element, and D1m is the inner diameter of the image-side surface of the first spacer element.

5. The optical imaging lens of claim 2, wherein said at least one spacer element further comprises a third spacer element located on the image side of said third lens and in contact with the image side portion of said third lens,

the optical imaging lens satisfies the following conditions: 4.5 < |f3/EP12+ f4/EP23| < 11.0, wherein f3 is the effective focal length of the third lens, f4 is the effective focal length of the fourth lens, EP12 is the separation distance of the image side of the first spacer element from the object side of the second spacer element in the direction along the optical axis, and EP23 is the separation distance of the image side of the second spacer element from the object side of the third spacer element in the direction along the optical axis.

6. The optical imaging lens of claim 5, wherein the optical imaging lens satisfies: 6.0 < R4/d2s+R5/d3s < 20.0, wherein R4 is the radius of curvature of the image side of the second lens, R5 is the radius of curvature of the object side of the third lens, d2s is the inner diameter of the object side of the second spacer element, and d3s is the inner diameter of the object side of the third spacer element.

7. The optical imaging lens of claim 5, wherein the optical imaging lens satisfies: -3.0 < R6/(ep23+cp3+ct2) < -2.0, wherein R6 is the radius of curvature of the image side of the third lens, EP23 is the separation distance of the image side of the second spacer element to the object side of the third spacer element in the direction along the optical axis, CP3 is the maximum thickness of the third spacer element, and CT2 is the central thickness of the second lens on the optical axis.

8. The optical imaging lens of claim 5, wherein said at least one spacer element further comprises a fourth spacer element located on the image side of said fourth lens and in contact with the image side portion of said fourth lens,

the optical imaging lens satisfies the following conditions: 3.5 < |f4/(EP 34-CT 4) +R7/D4s| < 12.0, wherein f4 is an effective focal length of the fourth lens, EP34 is a distance from an image side surface of the third spacer element to an object side surface of the fourth spacer element in a direction along the optical axis, CT4 is a center thickness of the fourth lens on the optical axis, R7 is a radius of curvature of the object side surface of the fourth lens, and D4s is an outer diameter of the object side surface of the fourth spacer element.

9. The optical imaging lens of claim 8, wherein the optical imaging lens satisfies: 4.0 < R8/d4s+T45/CP4 < 11.5, wherein R8 is the radius of curvature of the image side of the fourth lens, T45 is the air separation of the fourth lens and the fifth lens on the optical axis, d4s is the inner diameter of the object side of the fourth spacing element, and CP4 is the maximum thickness of the fourth spacing element.

10. The optical imaging lens of claim 5, wherein the optical imaging lens satisfies: 16.0 < R7/(EP 23+CT3) < 55.0, wherein R7 is a radius of curvature of an object side surface of the fourth lens, EP23 is a distance from an image side surface of the second spacer element to an object side surface of the third spacer element in a direction along the optical axis, and CT3 is a center thickness of the third lens on the optical axis.

11. The optical imaging lens of claim 8, wherein said at least one spacer element further comprises a fifth spacer element located on the image side of said fifth lens and in contact with the image side portion of said fifth lens,

the optical imaging lens satisfies the following conditions: 0.5 < EP 45/CT5+|R10|/(D5 s-D5 s) < 1.5, where EP45 is the separation distance in the direction along the optical axis of the image side of the fourth spacer element to the object side of the fifth spacer element, CT5 is the center thickness of the fifth lens on the optical axis, R10 is the radius of curvature of the image side of the fifth lens, D5s is the outer diameter of the object side of the fifth spacer element, and D5s is the inner diameter of the object side of the fifth spacer element.

12. The optical imaging lens of claim 11, wherein the optical imaging lens satisfies: 5.0 < |f6|/(D5 m-D5 m) + (R11+R12)/CP 5 < 7.5, where f6 is the effective focal length of the sixth lens, D5m is the outer diameter of the image-side surface of the fifth spacing element, D5m is the inner diameter of the image-side surface of the fifth spacing element, R11 is the radius of curvature of the object-side surface of the sixth lens, R12 is the radius of curvature of the image-side surface of the sixth lens, and CP5 is the maximum thickness of the fifth spacing element.

13. The optical imaging lens of any of claims 1-12, wherein the optical imaging lens satisfies: 5.5 < L/(Tan (Semi-FOV) × (D0 m-D0 m)) < 7.5, where L is the distance on the optical axis from the object side end of the lens barrel to the image side end of the lens barrel, semi-FOV is half the maximum field angle of the optical imaging lens, D0m is the outer diameter of the image side end of the lens barrel, and D0m is the inner diameter of the image side end of the lens barrel.