CN110412716B

CN110412716B - Periscope lens, imaging module and electronic device

Info

Publication number: CN110412716B
Application number: CN201810392904.1A
Authority: CN
Inventors: 请求不公布姓名; 邹海荣
Original assignee: Jiangxi Oufei Optics Co ltd
Current assignee: Jiangxi Oufei Optics Co ltd
Priority date: 2018-04-27
Filing date: 2018-04-27
Publication date: 2025-05-13
Anticipated expiration: 2038-04-27
Also published as: CN110412716A

Abstract

The present invention discloses a periscope lens, an imaging module and an electronic device. The periscope lens includes a plurality of optical elements arranged along the first optical axis and the second optical axis of the periscope lens, and includes, from the object side to the image side, a first lens with positive refractive power, an optical path folding element, a second lens with positive refractive power, a third lens with negative refractive power, a fourth lens with negative refractive power, and a fifth lens with negative refractive power. The optical path folding element is configured to direct light from the first optical axis to the second optical axis. The first lens to the fifth lens include at least one plane. The first lens is glued to the optical path folding element. The periscope lens satisfies the following conditional formula: f1>0 and f25>0. The periscope lens of the embodiment of the present invention satisfies the above conditional formula, and the reasonable distribution of optical focal length realizes the effect of telephoto and miniaturization of lateral aperture, thereby better adapting to the requirements of thin and light electronic devices.

Description

Periscope type lens, imaging module and electronic device

Technical Field

The invention relates to the technical field of imaging, in particular to a periscope type lens, an imaging module and an electronic device.

Background

With the development of technology, electronic devices tend to be light, thin and miniaturized, and smaller sizes of parts inside the electronic devices are required. The size of the imaging optical system must be miniaturized in the market trend. In the related art, a folding periscope type lens can achieve a better shooting effect and a larger zoom magnification, however, the caliber of a part of the lens cannot be miniaturized, and the light and thin electronic device is affected.

Disclosure of Invention

The embodiment of the invention provides a periscope type lens, an imaging module and an electronic device.

An embodiment of the present invention provides a periscope lens including a plurality of optical elements arranged along a first optical axis and a second optical axis of the periscope lens, including, in order from an object side to an image side:

A first lens element with positive refractive power having a convex object-side surface and a planar image-side surface;

an optical path folding element configured to direct light from the first optical axis to the second optical axis;

a second lens element with positive refractive power disposed on the second optical axis, wherein an object-side surface of the second lens element is convex;

a third lens element with negative refractive power disposed on the second optical axis;

a fourth lens element with negative refractive power disposed on the second optical axis, wherein an image-side surface of the fourth lens element is concave;

A fifth lens element with negative refractive power disposed on the second optical axis;

the first lens to the fifth lens at least comprise a plane, the first lens is glued on the light path folding element, and the periscope lens meets the following conditional expression:

f1>0, and

f25>0;

Wherein f1 is an effective focal length of the first lens, and f25 is a combined focal length from the second lens to the fifth lens.

The periscope type lens of the embodiment of the invention meets the above conditional expression, reasonably distributes the focal power, and realizes the effects of shooting distance and miniaturization of transverse caliber, thereby better adapting to the requirements of lightening and thinning of an electronic device.

In some embodiments, the periscope lens satisfies the following conditional expressions 1.75< TTL/(ImgH 2) <2.2;25< HFOV <28; and 0.55< DL/TTL <0.7, wherein TTL is the distance from the object side of the second lens to the image sensor on the second optical axis, imgH is half the diagonal length of the effective pixel area of the periscope lens, HFOV is 1/2 field angle of the diagonal direction of the image sensor, DL is the distance from the object side of the second lens to the image side of the fifth lens on the second optical axis. Therefore, the periscope lens can well image in a visual field range due to the compact and reasonable structural layout and reasonable distribution of the optical power.

In some embodiments, the periscope lens satisfies the following conditional expression of 0.9< TTL/f <1, wherein f is the effective focal length of the periscope lens, and TTL is the distance from the object side surface of the second lens to the image sensor on the second optical axis. Therefore, the compact and reasonable structural layout and reasonable distribution of the focal power realize the function of taking a photograph of the periscope type lens and ensure the imaging quality.

In some embodiments, the periscope lens satisfies the following conditional expression that T34/T45 is less than 0.5, wherein T34 is the air interval of the third lens and the fourth lens on the optical axis, and T45 is the air interval of the fourth lens and the fifth lens on the optical axis. Therefore, the reasonable layout of the size structure realizes the length dimension of the compression periscope lens, can slow down the direction change after light enters the system, and is beneficial to reducing the intensity of stray light.

In some embodiments, the periscope lens satisfies the following conditional expression of i f3/f4 i >1, wherein f3 is an effective focal length of the third lens and f4 is an effective focal length of the fourth lens. Therefore, the focal power balance is facilitated, the telephoto function is realized, and the sensitivity of the periscope lens is slowed down.

In some embodiments, the periscope lens satisfies the following conditional expression of f2/f1 >0.05, wherein f2 is the effective focal length of the second lens. Therefore, the lens is beneficial to focal power balance, compresses caliber sizes of a plurality of transverse lenses and reduces sensitivity of the periscope type lens.

In some embodiments, the periscope lens satisfies the following conditional expression of V3-V2 >30, wherein V3 is the Abbe number of the third lens and V2 is the Abbe number of the second lens. Thus, correction of chromatic aberration is facilitated, and performance of the periscope lens is guaranteed.

In some embodiments, at least one surface of at least one of the periscope lenses is aspheric. Therefore, the aspheric surface is beneficial to correcting the aberration of the periscope lens and reducing the number of lenses used, and the total length of the periscope lens can be effectively reduced.

In some embodiments, the periscope lens includes an aperture stop located on an object side of the second lens or between the second lens and the fifth lens. Thus, the transverse caliber of the periscope type lens is reduced.

In some embodiments, at least one of the periscope lenses is made of a first plastic material and at least one other lens is made of a second plastic material, the first plastic material having optical characteristics different from the optical characteristics of the second plastic material. Therefore, the lenses are made of plastic materials with different optical characteristics, so that the performance of the periscope type lens is guaranteed.

The imaging module of the embodiment of the invention comprises:

Image sensor, and

The periscope lens of any of the above embodiments, wherein the image sensor is disposed at an image side of the fifth lens.

The periscope type lens of the imaging module provided by the embodiment of the invention meets the above conditional expression, the optical power is reasonably distributed, and the effects of shooting distance and miniaturization of transverse caliber are realized, so that the requirements of lightening and thinning of an electronic device are better met.

In some embodiments, at least one of the plurality of optical elements is configured to translate or move along a respective optical axis to adjust the focus of an image at the imaging plane of the image sensor. In this way, an object scene can be dynamically focused from infinity to close range.

In some embodiments, the image sensor is configured to translate or move along a respective optical axis to adjust the focus of an image at an imaging plane of the image sensor. In this way, an object scene can be dynamically focused from infinity to close range.

The electronic device comprises a shell and the imaging module of any one of the embodiments, wherein the imaging module is arranged on the shell.

According to the electronic device provided by the embodiment of the invention, the periscope lens in the imaging module meets the above conditions, and the optical power is reasonably distributed, so that the effects of shooting distance and miniaturization of transverse caliber are realized, and the electronic device is light and thin.

Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Drawings

The foregoing and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings, in which:

FIG. 1 is a schematic view of a periscope lens according to an embodiment of the invention;

FIG. 2 is a graph of spherical aberration over the visible band from 470nm to 650nm for a periscope lens according to one embodiment of the invention;

FIG. 3 is a plot of astigmatism in the visible band from 470nm to 650nm for a periscope lens according to a first embodiment of the present invention;

FIG. 4 is a graph of distortion in the visible band of the periscope lens from 470nm to 650nm according to one embodiment of the invention;

FIG. 5 is a graph of spherical aberration over the visible band from 470nm to 650nm for a periscope lens according to a second embodiment of the invention;

FIG. 6 is a plot of astigmatism in the visible band from 470nm to 650nm for a periscope lens according to a second embodiment of the invention;

FIG. 7 is a graph of distortion in the visible band of the periscope lens from 470nm to 650nm according to the second embodiment of the invention;

FIG. 8 is a graph of spherical aberration over the visible band from 470nm to 650nm for a periscope lens according to a third embodiment of the invention;

FIG. 9 is an astigmatism curve over the visible band from 470nm to 650nm for a periscope lens according to a third embodiment of the invention;

FIG. 10 is a graph of distortion in the visible band of the periscope lens from 470nm to 650nm for embodiment three of the present invention;

FIG. 11 is a graph of spherical aberration over the visible band from 470nm to 650nm for a periscope lens according to a fourth embodiment of the invention;

FIG. 12 is a plot of astigmatism in the visible band from 470nm to 650nm for a periscope lens according to a fourth embodiment of the present invention;

FIG. 13 is a graph of distortion in the visible band of the periscope lens from 470nm to 650nm for example four embodiments of the present invention;

FIG. 14 is a schematic view of an imaging module according to an embodiment of the present invention;

Fig. 15 is a schematic plan view of an electronic device according to an embodiment of the present invention.

Detailed Description

Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only for explaining the present invention and are not to be construed as limiting the present invention.

In the description of the present invention, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more of the described features. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In the description of the present invention, it should be noted that the terms "mounted," "connected," and "coupled" are to be construed broadly, as well as, for example, fixedly coupled, detachably coupled, or integrally coupled, unless otherwise specifically indicated and defined. It may be a mechanical connection that is made, or may be an electrical connection. Can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

Referring to fig. 1, a periscopic lens 10 according to an embodiment of the present invention includes a plurality of optical elements arranged along a first optical axis AX1 and a second optical axis AX2 of the periscopic lens 10, and sequentially includes, from an object side to an image side:

The first lens element L1 with positive refractive power disposed on the first optical axis AX1, wherein an object-side surface S1 of the first lens element L1 is convex and an image-side surface S2 is planar;

an optical path folding element L0 configured to direct light from the first optical axis AX1 to the second optical axis AX2;

a second lens element L2 with positive refractive power disposed on the second optical axis AX2, wherein an object-side surface S9 of the second lens element L2 is convex;

A third lens element L3 with negative refractive power disposed on the second optical axis AX 2;

the fourth lens element L4 with negative refractive power disposed on the second optical axis AX2, wherein an image-side surface S15 of the fourth lens element L4 is concave;

A fifth lens element L5 with negative refractive power disposed on the second optical axis AX 2;

the first lens L1 to the fifth lens L5 at least comprise a plane, the first lens L1 is glued on the light path folding element L0, and the periscope type lens 10 satisfies the following conditional expressions of f1>0 and f25>0, wherein f1 is the effective focal length of the first lens L1, and f25 is the combined focal length of the second lens L2 to the fifth lens L5.

The periscope type lens 10 of the embodiment of the invention meets the above conditional expression, reasonably distributes the focal power, and achieves the effects of shooting distance and miniaturization of transverse caliber, thereby better adapting to the requirements of light and thin electronic device 100.

It can be understood that the periscope type lens 10 satisfies the conditional expressions of f1>0 and f25>0, and the reasonable distribution of the focal power is beneficial to realizing the tele function and the transverse caliber miniaturization of the periscope type lens 10. Specifically, downsizing of the apertures of the second lens L2, the third lens L3, the fourth lens L4, and the fifth lens L5 is facilitated. In this way, by reducing the lateral caliber of the periscope lens 10, the periscope lens 10 is miniaturized, so that the periscope lens 10 is better suitable for the requirement of light and thin electronic device 100.

Further, the first lens element L1 with positive refractive power is bonded to the optical path folding element L0, so that the lateral aperture of the periscope lens 10 can be effectively reduced, that is, the apertures of the second lens element L2, the third lens element L3, the fourth lens element L4, and the fifth lens element L5 can be reduced. In the example of the present invention, the image side surface of the first lens L1 is a plane.

In the present embodiment, the first optical axis AX1 is substantially perpendicular to the second optical axis AX2. It will be appreciated that in other embodiments, the first optical axis may form an angle with the second optical axis other than 90 degrees.

In some embodiments, periscope lens 10 satisfies the following conditional expressions 1.75< TTL/(ImgH 2) <2.2;25< HFOV <28; and 0.55< DL/TTL <0.7, where TTL is the distance from the object side of second lens L2 to image sensor 20 on second optical axis AX2, imgH is half the effective pixel area diagonal of periscope lens, HFOV is 1/2 field angle in the diagonal direction of image sensor 20, DL is the distance from the object side of second lens L2 to the image side of fifth lens L5 on second optical axis AX 2.

In this way, the compact and rational structural layout and rational distribution of optical power provide good imaging of periscope lens 10 over a viewable field of view. Specifically, in some examples, the TTL/(ImgH 2) value may be 1.76, 1.80, 1.93, 2.0, 2.1, or other values between 1.75 and 2.2. The HFOV may take on values of 26, 27 or other values between 25 and 28. The DL/TTL can take on values of 0.56, 0.19, 0.6, 0.65, or other values between 0.55 and 0.7.

In some embodiments, the periscope lens 10 satisfies the following conditional expression 0.9< TTL/f <1, where f is the effective focal length of the periscope lens 10, and TTL is the distance from the object side surface of the second lens L2 to the image sensor 20 on the second optical axis AX 2.

Thus, the compact and reasonable structural layout and reasonable distribution of the focal power realize the function of taking the periscope type lens 10 and ensure the imaging quality. Specifically, in some examples, TTL/f can take on values of 0.91, 0.94, 0.96, 0.99, or other values between 0.9 and 1.

In some embodiments, periscope lens 10 satisfies the following conditional expression that T34/T45<0.5, wherein T34 is the air spacing of third lens L3 and fourth lens L4 on second optical axis AX2, and T45 is the air spacing of fourth lens L4 and fifth lens L5 on second optical axis AX 2.

Therefore, the reasonable layout of the size structure realizes the length dimension of the compression periscope lens 10, can slow down the direction change after light enters the system, and is beneficial to reducing the intensity of stray light. Specifically, in some examples, T34/T45 may take on values of 0.45, 0.4, 0.3, or other values of 0.3 or more and less than 0.5.

In some embodiments, periscope lens 10 satisfies the following conditional expression of |f3/f4| >1, where f3 is the effective focal length of third lens L3 and f4 is the effective focal length of fourth lens L4.

Thus, the focal power balance is facilitated, the telephoto function is realized, and the sensitivity of the periscope lens 10 is slowed down. Specifically, in some examples, |f3/f4| may take on values of 1.2, 2, 4, or other values greater than 1.

In some embodiments, periscopic lens 10 satisfies the following conditional expression of |f2/f1| >0.05, where f2 is the effective focal length of second lens L2.

In this way, power balancing is facilitated, the aperture size of the plurality of lateral lenses is compressed, while the sensitivity of the periscope lens 10 is slowed down. Specifically, in some examples, the value of i f2/f1 may be 0.06, 0.1, 0.5, or other values greater than 0.05.

In some embodiments, periscope lens 10 satisfies the following conditional expression of V3-V2 >30, where V3 is the Abbe number of third lens L3 and V2 is the Abbe number of second lens L2.

Thus, correction of chromatic aberration and assurance of performance of the periscope lens 10 are facilitated. Specifically, in some examples, |v3-v2| may take on values of 31, 35, 40, or other values greater than 30.

In some embodiments, at least one surface of at least one of the periscope lenses 10 is aspheric.

Thus, the aspheric surface is beneficial to correcting the aberration of the periscope lens 10 and reducing the number of lenses used, so that the total length of the periscope lens 10 can be effectively reduced. It will be appreciated that the aspherical surface is easily formed in a shape other than a spherical surface, and a large number of control variables can be obtained, which is advantageous not only in reducing aberrations but also in reducing the number of lenses.

In some embodiments, periscope lens 10 includes an aperture stop AS. The aperture stop AS is located on the object side of the second lens L2 or between the second lens L2 and the fifth lens L5.

In this way, the lateral aperture of the periscope lens 10, that is, the apertures of the second lens L2, the third lens L3, the fourth lens L4, and the fifth lens L5 can be advantageously reduced. It will be appreciated that according to epd=efl/Fno (EPD is the entrance pupil diameter, EFL is the effective focal length, fno is the F-number), for certain conditions of EFL and Fno, EPD is also certain. The periscope lens 10 images and includes a first lens L1, a prism, a second lens L2, a third lens L3, a fourth lens L4 and a fifth lens L5, and an aperture stop AS is arranged, and an entrance pupil is an image formed by a system part before the stop passes through the aperture stop, so that the aperture of the second lens L2, the third lens L3, the fourth lens L4 and the fifth lens L5 can be miniaturized.

In some embodiments, the light path folding element L0 is a prism. Thus, the prism is used to turn the light path. Specifically, the prism is a triangular prism.

In some embodiments, at least one of the periscope lens 10 is made of a first plastic material and at least one other lens is made of a second plastic material, the first plastic material having optical characteristics that are different from the optical characteristics of the second plastic material.

Thus, the lenses are made of plastic materials with different optical characteristics, which is beneficial to ensuring the performance of the periscope lens 10. The optical characteristics are, for example, abbe number and/or refractive index. Specifically, the first lens L1, the second lens L2, the fourth lens L4, and the fifth lens L5 are made of a first plastic material, and the third lens L3 is made of a second plastic material. In one example, the refractive index of the first plastic material is 1.544 and the refractive index of the second plastic material is 1.65.

In the periscope lens 10 of the present invention, a convex lens surface means that a portion of the lens surface close to the optical axis of the periscope lens 10 is convex, and a concave lens surface means that a portion of the lens surface close to the optical axis of the periscope lens 10 is concave.

The shape of the aspherical surface is determined by the following formula:

Where h is the height from any point on the aspherical surface to the optical axis, c is the vertex curvature, k is the conic constant, ai is the correction factor of the i-th order of the aspherical surface.

The present invention will be described in detail with reference to the following specific examples in conjunction with the accompanying drawings.

Embodiment one:

Referring to fig. 1 to 4, the periscope lens 10 of the present embodiment satisfies the following conditions of table 1 to table 3, wherein ASP represents an aspherical surface.

TABLE 1

Where F is the effective focal length of the periscope lens 10, fno is the F number, i.e., the inverse of the relative aperture, FOV is the field angle, TTL is the distance from the object side surface of the second lens L2 to the image sensor 20 on the second optical axis AX2, DL is the distance from the object side surface of the second lens L2 to the image side surface of the fifth lens L5 on the second optical axis AX2, imgH is half the diagonal length of the effective pixel area of the periscope lens 10, MIC is the maximum image height (full image height), CRA is the angle between the chief ray of the corresponding field of view and the normal of the imaging surface, SL is the distance from the aperture stop AS to the image sensor 20 on the second optical axis AX2, and EPD is the entrance pupil diameter.

In table 1, surfaces S3 to S7 represent five faces of the optical path folding element L0 (triangular prism), and surfaces S6 and S7 represent two triangular side faces of the triangular prism, one facing out of the drawing plane and one facing in the drawing plane, which are not shown in fig. 1. The surface S11 is a virtual plane between the second lens L2 and the third lens L3, which is not shown in fig. 1, but the surface S11 may be omitted.

TABLE 2

TABLE 3 Table 3

In table 3, a lens surface with an optical axis indicates that a portion of the lens surface at the optical axis is concave, convex or planar, and a lens surface with a circumference indicates that a portion of the lens surface at the circumferential edge is concave, convex or planar.

Embodiment two:

referring to fig. 1 and 5 to 7, the periscope lens 10 of the present embodiment satisfies the following conditions of tables 4 to 6, wherein ASP represents an aspherical surface.

TABLE 4 Table 4

In table 4, surfaces S3 to S7 represent five faces of the optical path folding element L0 (triangular prism), and surfaces S6 and S7 represent two triangular side faces of the triangular prism, one facing out of the drawing plane and one facing in the drawing plane, which are not shown in fig. 1. The surface S11 is a virtual plane between the second lens L2 and the third lens L3, which is not shown in fig. 1, but the surface S11 may be omitted.

TABLE 5

TABLE 6

In table 6, a lens surface with an optical axis indicates that a portion of the lens surface at the optical axis is concave, convex or planar, and a lens surface with a circumference indicates that a portion of the lens surface at the circumferential edge is concave, convex or planar.

Embodiment III:

Referring to fig. 1 and 8 to 10, the periscope lens 10 of the present embodiment satisfies the following conditions of table 7 to 9, wherein ASP represents an aspherical surface.

TABLE 7

In table 7, surfaces S3 to S7 represent five faces of the optical path folding element L0 (triangular prism), and surfaces S6 and S7 represent two triangular side faces of the triangular prism, one facing out of the drawing plane and one facing in the drawing plane, which are not shown in fig. 1. The surface S11 is a virtual plane between the second lens L2 and the third lens L3, which is not shown in fig. 1, but the surface S11 may be omitted.

TABLE 8

TABLE 9

In table 9, a lens surface with an optical axis indicates that a portion of the lens surface at the optical axis is concave, convex or planar, and a lens surface with a circumference indicates that a portion of the lens surface at the circumferential edge is concave, convex or planar.

Embodiment four:

referring to fig. 1 and 11 to 13, the periscope lens 10 of the present embodiment satisfies the following conditions of table 10 to table 12, wherein ASP represents an aspherical surface.

Table 10

In table 10, surfaces S3 to S7 represent five faces of the optical path folding element L0 (triangular prism), and surfaces S6 and S7 represent two triangular side faces of the triangular prism, one facing out of the drawing plane and one facing in the drawing plane, which are not shown in fig. 1. The surface S11 is a virtual plane between the second lens L2 and the third lens L3, which is not shown in fig. 1, but the surface S11 may be omitted.

TABLE 11

Table 12

In table 12, a lens surface with an optical axis indicates that a portion of the lens surface at the optical axis is concave, convex or planar, and a lens surface with a circumference indicates that a portion of the lens surface at the circumferential edge is concave, convex or planar.

Referring to fig. 14, an imaging module 100 according to an embodiment of the present invention includes an image sensor 20 and the periscope lens 10 according to any of the above embodiments. The image sensor 20 is disposed on the image side of the fifth lens L5.

The imaging module 100 of the embodiment of the invention has the advantages that the periscope type lens 10 meets the above conditional expression, the optical power is reasonably distributed, and the effects of remote shooting and transverse caliber miniaturization are realized, so that the requirements of lightening and thinning of the electronic device 100 are better met.

It is understood that the image sensor 20 may be a complementary metal oxide semiconductor (CMOS, complementary Metal Oxide Semiconductor) image sensor or a Charge-coupled Device (CCD) image sensor.

In some embodiments, at least one of the plurality of optical elements is configured to translate or move along a respective optical axis to adjust the focus of the image at the imaging plane of the image sensor 20.

In this way, an object scene can be dynamically focused from infinity (object distance 20 meters or more) to close distance (less than 1 meter).

In some embodiments, the image sensor 20 is configured to translate or move along a respective optical axis to adjust the focus of the image at the imaging plane of the image sensor 20.

Referring to fig. 15, an electronic device 1000 according to an embodiment of the invention includes a housing 200 and the imaging module 100 according to any of the above embodiments, where the imaging module 100 is mounted on the housing 200.

In the electronic device 1000 according to the embodiment of the invention, the periscope lens 10 in the imaging module 100 meets the above condition, and the reasonable distribution of optical power achieves the effects of remote shooting and miniaturization of transverse caliber, and is beneficial to the thinning of the electronic device 1000.

It is understood that the electronic apparatus 1000 according to the embodiment of the present invention includes, but is not limited to, information terminal devices such as a smart phone, a Personal digital assistant (Personal DIGITAL ASSISTANT, PDA), a tablet computer, a Personal computer (Personal computer, PC), a smart wearable device, or home appliances with photographing function. In the example of fig. 15, the electronic device 1000 is a smartphone. The imaging module 100 may be disposed on the back of the electronic device 1000.

The above disclosure provides many different embodiments, or examples, for implementing different structures of the invention. The foregoing description of specific example components and arrangements has been presented to simplify the present disclosure. They are, of course, merely examples and are not intended to limit the invention. Furthermore, the present invention may repeat reference numerals and/or letters in the various examples, which are for the purpose of brevity and clarity, and which do not themselves indicate the relationship between the various embodiments and/or arrangements discussed. In addition, the present invention provides examples of various specific processes and materials, but one of ordinary skill in the art will recognize the application of other processes and/or the use of other materials.

In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the spirit and scope of the invention as defined by the appended claims and their equivalents.

Claims

1. A periscope lens, characterized in that it has a total of five lenses with refractive power, including a plurality of optical elements arranged along the first optical axis and the second optical axis of the periscope lens, and in order from the object side to the image side, includes:

a first lens having positive refractive power, located on the first optical axis, wherein the object side surface of the first lens is a convex surface and the image side surface is a flat surface;

a second lens having positive refractive power, located on the second optical axis, wherein the object side surface of the second lens is a convex surface;

a third lens having negative refractive power, located on the second optical axis;

a fourth lens having negative refractive power, located on the second optical axis, wherein the image side surface of the fourth lens is a concave surface;

a fifth lens element having negative refractive power, located on the second optical axis;

The first lens to the fifth lens include at least one plane, the first lens is glued to the optical path folding element, and the periscope lens satisfies the following conditional formula:

f1>0; and

f25>0;

Wherein, f1 is the effective focal length of the first lens, and f25 is the combined focal length of the second lens to the fifth lens;

At least one surface of at least one lens in the periscope lens is aspherical;

At least one lens in the periscope lens is made of a first plastic material, and at least another lens is made of a second plastic material, and the optical properties of the first plastic material are different from the optical properties of the second plastic material.

2. The periscope lens according to claim 1, wherein the periscope lens satisfies the following condition:

1.75<TTL/(ImgH*2)<2.2;

25<HFOV<28; and

0.55<DL/TTL<0.7;

Among them, TTL is the distance from the object side of the second lens to the image sensor on the second optical axis, ImgH is half the diagonal length of the effective pixel area of the periscope lens, HFOV is 1/2 the field of view angle of the image sensor in the diagonal direction, and DL is the distance from the object side of the second lens to the image side of the fifth lens on the second optical axis.

3. The periscope lens according to claim 1, wherein the periscope lens satisfies the following condition:

0.9<TTL/f<1;

Wherein, f is the effective focal length of the periscope lens, and TTL is the distance from the object side of the second lens to the image sensor on the second optical axis.

4. The periscope lens according to claim 1, wherein the periscope lens satisfies the following condition:

0.3≤T34/T45<0.5;

Wherein, T34 is an air gap between the third lens and the fourth lens on the second optical axis, and T45 is an air gap between the fourth lens and the fifth lens on the second optical axis.

5. The periscope lens according to claim 1, wherein the periscope lens satisfies the following condition:

|f3/f4|>1;

Wherein, f3 is the effective focal length of the third lens, and f4 is the effective focal length of the fourth lens.

6. The periscope lens according to claim 1, wherein the periscope lens satisfies the following condition:

|f2/f1|>0.05;

Wherein f2 is the effective focal length of the second lens.

7. The periscope lens according to claim 1, wherein the periscope lens satisfies the following condition:

|V3-V2|>30;

Wherein, V3 is the Abbe number of the third lens, and V2 is the Abbe number of the second lens.

8. The periscope lens according to claim 1, characterized in that the periscope lens comprises an aperture stop, and the aperture stop is located on the object side of the second lens or between the second lens to the fifth lens.

9. An imaging module, comprising:

Image sensor; and

The periscope lens according to any one of claims 1 to 8, wherein the image sensor is arranged on the image side of the fifth lens.

10 . The imaging module according to claim 9 , wherein at least one of the plurality of optical elements is configured to translate or move along a corresponding optical axis to adjust the focus of the image at an imaging plane of the image sensor.

11. The imaging module according to claim 9, characterized in that the image sensor is configured to translate or move along a corresponding optical axis to adjust the focus of the image at an imaging surface of the image sensor.

12 . An electronic device, comprising a housing and the imaging module according to claim 9 , wherein the imaging module is mounted on the housing.