CN110888216B

CN110888216B - Optical lens, lens module and terminal

Info

Publication number: CN110888216B
Application number: CN201911065332.7A
Authority: CN
Inventors: 马凯; 卢建龙; 张为波
Original assignee: Honor Device Co Ltd
Current assignee: Honor Device Co Ltd
Priority date: 2019-11-04
Filing date: 2019-11-04
Publication date: 2021-10-22
Anticipated expiration: 2039-11-04
Also published as: CN110888216A

Abstract

The application provides an optical lens, a lens module and a terminal. The lens module includes: the optical lens is used for imaging scenes on the object side on the photosensitive assembly; the optical lens comprises a lens barrel and a lens group accommodated in the lens barrel; the lens assembly comprises, in order from an object side to an image side: a first lens group comprising at least one first reflective surface facing the image side; the second lens group comprises at least one second reflecting surface, the second reflecting surface faces the object side, is opposite to the first reflecting surface and is used for reflecting the received light to the first reflecting surface; the lens module further comprises a motor, and the motor is connected with the first lens group or the second lens group to drive the first lens group or the second lens group to move along the optical axis direction. The technical scheme can realize continuous zooming under short optical thickness and has simple structure.

Description

Optical lens, lens module and terminal

Technical Field

The present application relates to the field of lenses, and in particular, to an optical lens, a lens module, and a terminal.

Background

With the continuous development of terminal technology, the camera function has become an important feature of the terminal device and a main index for evaluating the performance of the terminal device. In order to meet the diversified requirements of users, the optical lens on the terminal can realize zooming, so that the far and near images can be clearly imaged.

Generally, a zoom lens can easily adjust a short focal length, but for adjusting a long focal length, the adjustment is limited by the thickness of a terminal device, the achievable zoom factor is small, and effects such as object magnification and background blurring are not obvious. For the requirement of longer focal length, the periscopic structure with a prism is usually used to realize the long focus by turning the optical path.

Zooming is realized through the periscopic structure, one mode can be realized through the combination switching of two lens modules with different focal lengths, and the other mode is realized by additionally adding a focusing module on the basis of a single periscopic structure. In the above manner of realizing zooming, the optical lens has a complex structure and a large volume.

Disclosure of Invention

The technical scheme of the application provides an optical lens, lens module and terminal, can realize zooming under shorter optical thickness in succession, simple structure.

In a first aspect, a lens module is provided, which includes: the optical lens is used for imaging scenes on an object side on the photosensitive assembly; the optical lens comprises a lens barrel and a lens group accommodated in the lens barrel; the lens group comprises in order from an object side to an image side: a first lens group comprising at least one first reflective surface facing the image side; a second lens group including at least one second reflective surface facing the object side opposite to the first reflective surface for reflecting the received light toward the first reflective surface; the lens module further comprises a motor, and the motor is connected with the first lens group or the second lens group to drive the first lens group or the second lens group to move along the optical axis direction.

In the embodiment of the application, the first reflecting surface and the second reflecting surface are folded on the light path, so that the thickness of the optical lens can be compressed, the long focal length can be realized, and the reduction of the space size can be realized. The motor drives the first lens group or the second lens group to move relatively, the distance between the first reflecting surface and the second reflecting surface can be changed, correspondingly, the total length of a light path from the incident surface to the imaging surface is changed, the focal length of the optical lens is also changed, and therefore continuous zooming can be achieved. The structure design is beneficial to realizing the miniaturization of the lens module, and when the structure design is applied to a terminal, the requirement of terminal lightening and thinning can be met, and the optical lens has a simple structure and can greatly reduce the assembly difficulty.

With reference to the first aspect, in one possible implementation manner, the optical lens further includes at least one refractive surface.

By providing at least one refractive surface, aberrations can be corrected.

With reference to the first aspect, in one possible implementation manner, one or more of the at least one refractive surface is a free-form surface.

It should be understood that optically curved surfaces without an axis of rotational symmetry are often referred to collectively as free-form surfaces.

With reference to the first aspect, in a possible implementation manner, the optical axes of the first lens group and the second lens group coincide.

The first lens group and the second lens group are designed coaxially, so that the process difficulty and the structural complexity of the lens module can be reduced.

With reference to the first aspect, in a possible implementation manner, the first reflecting surface is circular, the second reflecting surface is annular, and an outer diameter of the annular shape is larger than a diameter of the circular shape.

This prevents the first reflective surface from completely blocking light incident on the second reflective surface.

With reference to the first aspect, in a possible implementation manner, a preset distance is provided between the optical axis of the second lens group and the optical axis of the first lens group, so that the light incident on the optical lens can be partially or completely incident on the second reflection surface.

The second lens group and the first lens group are arranged at a preset distance, namely the first reflecting surface and the second reflecting surface are designed in an off-axis mode, so that the shielding of the first reflecting surface on the light rays incident to the second reflecting surface can be eliminated.

With reference to the first aspect, in a possible implementation manner, the first reflecting surface and the second reflecting surface are both circular, and the preset distance is not less than a sum of a radius of the first reflecting surface and a radius of the second reflecting surface.

The structure is designed so that the first reflecting surface does not completely shield the light rays incident to the second reflecting surface.

With reference to the first aspect, in a possible implementation manner, the lens barrel includes a first barrel portion and a second barrel portion that are separated from each other, the first barrel portion is configured to accommodate the first lens group, the second barrel portion is configured to accommodate the second lens group, and the first barrel portion is connected to the motor or the second barrel portion is connected to the motor.

With reference to the first aspect, in a possible implementation manner, the lens set further includes a third lens group, and the third lens group includes at least one refractive element.

With reference to the first aspect, in a possible implementation manner, the lens set further includes a third lens group, and the third lens group includes one or more refractive surfaces.

With reference to the first aspect, in a possible implementation manner, when the optical axes of the first lens group and the second lens group are coincident, the third lens group is accommodated in the second barrel portion.

The second lens group and the third lens group are accommodated in the second lens barrel part, and the second lens group and the third lens group can be integrally packaged, so that the structure is simplified, and the assembly is convenient.

With reference to the first aspect, in a possible implementation manner, the first reflecting surface and/or the second reflecting surface is a curved reflecting surface.

In a second aspect, an optical lens is provided, which includes a lens barrel and a lens group accommodated in the lens barrel; the lens group comprises in order from an object side to an image side: a first lens group comprising at least one first reflective surface facing the image side; a second lens group including at least one second reflective surface facing the object side opposite to the first reflective surface for reflecting the received light toward the first reflective surface; one of the first lens group and the second lens group is a fixed group, and the other of the first lens group and the second lens group is movable relative to the fixed group.

With reference to the second aspect, in one possible implementation manner, the lens set further includes at least one refractive surface.

With reference to the second aspect, in one possible implementation manner, one or more of the at least one refractive surface is a free-form surface.

With reference to the second aspect, in a possible implementation manner, the optical axes of the first lens group and the second lens group coincide.

With reference to the second aspect, in a possible implementation manner, the first reflecting surface is circular, the second reflecting surface is annular, and an outer diameter of the annular shape is larger than a diameter of the circular shape.

With reference to the second aspect, in a possible implementation manner, a preset distance is provided between the optical axis of the second lens group and the optical axis of the first lens group, so that the light incident on the optical lens can be partially or completely incident on the second reflection surface.

With reference to the second aspect, in a possible implementation manner, the first reflecting surface and the second reflecting surface are both circular, and the preset distance is not less than a sum of a radius of the first reflecting surface and a radius of the second reflecting surface.

With reference to the second aspect, in a possible implementation manner, the lens barrel includes a first barrel portion and a second barrel portion that are separated from each other, the first barrel portion is configured to accommodate the first lens group, and the second barrel portion is configured to accommodate the second lens group.

With reference to the second aspect, in a possible implementation manner, the lens set further includes a third lens group, and the third lens group includes one or more refractive surfaces.

With reference to the second aspect, in a possible implementation manner, when the optical axes of the first lens group and the second lens group are overlapped, the third lens group is accommodated in the second lens barrel portion.

With reference to the second aspect, in a possible implementation manner, the first reflecting surface and/or the second reflecting surface is a curved reflecting surface.

In a third aspect, a terminal is provided, which includes the lens module in any one of the foregoing possible implementations of the first aspect and the first aspect, or includes the optical lens in any one of the foregoing possible implementations of the second aspect and the second aspect.

Drawings

Fig. 1 is a schematic structural diagram of a terminal according to an embodiment of the present application;

FIG. 2 is a schematic view of the imaging principle;

fig. 3 is a schematic cross-sectional view of a lens module according to an embodiment of the present disclosure;

fig. 4 is a schematic structural diagram of an optical lens provided in an embodiment of the present application;

fig. 5 is a schematic structural diagram of another optical lens provided in an embodiment of the present application;

fig. 6 is a schematic structural diagram of another optical lens provided in an embodiment of the present application;

fig. 7 is a schematic structural diagram of still another optical lens provided in an embodiment of the present application;

FIG. 8 is a schematic diagram of the optical lens of FIG. 7 for continuous zooming;

fig. 9 is an exploded view of a lens module according to an embodiment of the present disclosure;

fig. 10 is a schematic assembly view of the lens module in fig. 9;

FIG. 11 is a schematic exploded view of the first assembly of FIG. 9;

FIG. 12 is a schematic exploded view of the second assembly of FIG. 9;

FIG. 13 is a schematic exploded view of the third assembly of FIG. 9;

fig. 14 is an exploded view of a lens module according to an embodiment of the present disclosure;

fig. 15 is a schematic assembly view of the lens module in fig. 14;

FIG. 16 is a schematic exploded view of the second assembly of FIG. 14;

FIG. 17 is a schematic exploded view of the third assembly of FIG. 14;

fig. 18 is a schematic structural diagram of an optical lens provided in an embodiment of the present application;

fig. 19 is a schematic and schematic diagram of the optical lens zooming in fig. 18;

fig. 20 is a schematic diagram of the optical lens zooming in fig. 18.

Reference numerals:

101-a display screen; 102-a housing; 103-a lens module; 104-lens protection lens; 201-an optical lens; 202-an image sensor; 203-analog-to-digital converter; 204-an image processor; 205-a memory; 301-a first component; 302-a second component; 303-a third component; 304-viscose glue; 1-a lens group; 11-a first lens group; 111-a first reflective surface; 112-a first refractive element; 1121-object side; 1122-image side; 12-a second lens group; 121-a second reflective surface; 13-a third lens group; 131-a first refractive element; 1311-object side; 1312-image side; 132-a third refractive element; 1321-object side; 1322-image side; 2-a lens barrel; 21-a first barrel section; 22-a second barrel section; 3-a motor; 4-a lens base; 5-an infrared cut filter; 51-a scaffold; 6-a sensor; 7-a circuit board; 81-a first collar; 82-a second collar; 83-third retainer ring; 9-connector.

Detailed Description

The technical solution in the present application will be described below with reference to the accompanying drawings. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments.

In the following, the terms "first", "second", etc. 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 defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature.

Furthermore, in the present application, directional terms such as "center," "upper," "lower," "left," "right," "top," "bottom," and the like are defined with respect to a schematically placed orientation or position of a component in a drawing, it being understood that these directional terms are relative concepts that are used for descriptive and clarity purposes and not intended to indicate or imply that a particular orientation of a referenced device or component must be in a particular orientation or be constructed and operated in a particular orientation, which can be varied accordingly depending on the orientation in which the component is placed in the drawing, and therefore should not be construed as limiting the present application.

It should be noted that the same reference numerals are used to denote the same components or parts in the embodiments of the present application, and for the same parts in the embodiments of the present application, only one of the parts or parts may be given the reference numeral, and it should be understood that the reference numerals are also applicable to the other same parts or parts.

The terminals referred to in the embodiments of the present application may include handheld devices, vehicle mounted devices, wearable devices, computing devices or other processing devices connected to a wireless modem. But may also include cellular phones (cellular phones), smart phones (smart phones), Personal Digital Assistants (PDAs), tablet computers, laptop computers (laptop computers), Machine Type Communication (MTC) terminals, point of sale (POS) terminals, in-vehicle computers, and other terminals having an imaging function. In the embodiment of the present application, a terminal may also be referred to as a terminal device.

For convenience of understanding, technical terms related to the present application are explained and described below.

The optical axis, which is the direction of the optical system conducting light, refers to the chief ray of the central field of view. For a symmetric transmission system, it is generally coincident with the optical system rotation centerline. For off-axis and reflective systems, the optical axis will also appear as a polyline.

When light parallel to the optical axis enters the convex lens, the ideal convex lens is that all light converges at a point behind the lens, and the point converging all light is the focus.

Focal length (focal length), also known as focal length, is a measure of the concentration or divergence of light in an optical system, and refers to the distance from the optical center of a lens or a lens group to the focal point when an infinite object is focused by the lens or the lens group into a sharp image on the focal plane, and can also be understood as the perpendicular distance from the optical center of the lens or the lens group to the focal plane. From a practical point of view it can be understood as the distance of the lens center to the imaging plane. For a fixed-focus lens, the position of the optical center is fixed and unchanged, so that the focal length is fixed; for a zoom lens, a change in the optical center of the lens results in a change in the focal length of the lens, and thus the focal length can be adjusted.

According to the zoom range, the lens can be divided into an ultra-wide angle lens (the focal length is less than 21mm), a wide angle lens (the focal length is 21mm-35mm), a standard lens (the focal length is 35mm-70mm), a medium telephoto lens (the focal length is 70mm-135mm), a telephoto lens (the focal length is 135 plus 500mm +), and the like.

Zooming is helpful for magnifying a distant object in telescopic shooting, wherein optical zooming can support more pixels after an image main body is imaged, so that the main body is enlarged and relatively clearer, and the resolution and the image quality are not changed. Optical zooming relies on optical lens structures to achieve zooming, particularly by changing the position of the lens, the object and the focal point. When the imaging plane moves in the horizontal direction, the vision and the focal distance are changed, and the scene farther away becomes clearer. The optical zoom changes the focal length of the zoom lens by changing the relative positions of the respective lenses in the zoom lens, so that a subject to be photographed can be zoomed in or out. The image is amplified by the principle of physics, in the amplifying process, the photosensitive element directly senses light from a shot object and forms an image without any other electronic amplifying process, and in the process, the photosensitive element is imaged in a full-width mode, and the image can keep the original highest resolution. Therefore, the image obtained by the optical zoom not only makes the subject larger, but also is relatively sharper. The larger the multiple of optical zoom, the farther the scene can be photographed.

The focal length of the zoom lens has two readings, wherein the smaller is called the wide-angle end (the maximum angle can be obtained), the larger is called the telephoto end (the longest focal length can be obtained), and any focal length within the two focal length end ranges can be used in shooting, wherein the wider the wide-angle end of the lens focal length is (i.e. the smaller the number is), the wider a scene can be shot, and the longer the telephoto end is (i.e. the larger the number is), the farther a scene can be shot. And dividing the number of the telephoto end by the number of the wide-angle end to obtain the zoom multiple. For example, the optical zoom factor is 2-5 times, and objects except 10 meters can be zoomed in to 5-2 meters; the lens with the zoom multiple of more than 20 times can shoot not only large scenes in front of eyes, but also objects beyond a very long distance; the zoom factor is 50 times, and when a scene beyond 3000 meters is shot, the scene is shot by standing at a place 60 meters.

A field of view (FOV) is an angle of view formed by two edges of an optical instrument, at which an object image of a measurement target can pass through the maximum range of a lens, with the lens of the optical instrument as a vertex. The size of the field angle determines the field of view of the optical instrument, with a larger field angle providing a larger field of view and a smaller optical magnification. The shorter the focal length, the wider the horizontal field of view, and thus the smaller the image, the narrower the horizontal field of view with increasing focal length, and the larger the subject.

Aberration, also known as axial chromatic aberration, longitudinal chromatic aberration, or positional chromatic aberration, or axial aberration, is a phenomenon in which a bundle of light rays parallel to the optical axis converge at different positions in front and rear after passing through a lens. The reason is that the positions of the lens for imaging the light with various wavelengths are different, so that the focal planes of the images of the light with different colors cannot be overlapped during final imaging, and the polychromatic light is scattered to form dispersion.

The optical path of a light ray in a lens refers to the path that the light ray travels from the incident surface of the lens to the imaging surface.

Spherical and aspherical lenses are mainly used for lens geometries of lenses (lenses of various cameras, microscopes, etc.) and spectacles (including contact lenses), i.e. spherical lenses and aspherical lenses. The difference in the geometrical shape of the two determines the difference in the refraction direction of the parallel incident light, thereby affecting the imaging effect.

The spherical lens has a spherical radian and an arc-shaped cross section. When light rays with different wavelengths are incident on different positions on the rear lens in a parallel optical axis manner, the light rays cannot be focused into a point on a film plane (a plane which is perpendicular to the connection line between the center of the lens and the focal point of the lens and passes through the focal point), so that the problem of aberration is caused, the quality of an image is influenced, and phenomena such as definition reduction and deformation occur.

Aspherical lenses are lenses in which the lens is not curved spherically but the edge portion of the lens is cut off a little and the cross section is planar. When light is incident on the aspherical mirror surface, the light can be focused on one point, namely the film plane, so that various aberrations can be eliminated.

The free-form surface is generally optically a surface having no rotational symmetry axis and is generally called a free-form surface.

The object space is defined by the lens, and the space where the object is located is the object space.

The image space is defined by the lens, and the space where the light emitted by the object passes through the lens to form an image behind the lens is the image space.

The surface of the lens close to the object side can be called an object side surface; the side of the lens on which the image of the object is located is the image side, and the surface of the lens close to the image side can be referred to as the image side surface.

Fig. 1 shows a schematic diagram of a terminal. The terminal 100 may be a terminal device having a camera function, such as a cellular phone (cellular phone), a mobile phone, a smart phone (smart phone), a tablet computer, a portable computer, a laptop computer (laptop computer), a camcorder, a video recorder, a camera, a smart watch (smart watch), a smart bracelet (smart watchband), or other devices having a camera function. The embodiment of the present application does not specifically limit the specific form of the terminal 100. For convenience of explanation and understanding, the following description will be given taking the terminal 100 as a mobile phone as an example.

The terminal 100 may include a Display Panel (DP) 101, a housing 102, a lens module (CCM) 103, and the like, as shown in fig. 1. The housing 102 is formed with an accommodating space, and the display screen 101 and the lens module 103 are disposed in the accommodating space of the housing 102. The display screen 101 may be a Liquid Crystal Display (LCD) screen, an Organic Light Emitting Diode (OLED) display screen, and the like, wherein the OLED display screen may be a flexible display screen or a rigid display screen.

The lens module 103 may be disposed only on the front side of the terminal 100, and is used for capturing a scene on the front side of the terminal 100, and in some embodiments, may be referred to as a front lens module; or may be only disposed on the back of the terminal 100, and is used to shoot a scene located on one side of the back of the terminal 100, which may be referred to as a rear lens module in some embodiments; the camera module can also be arranged on the front and back of the terminal 100, as shown in fig. 1, the front of the terminal 100 is provided with the lens module 103, and the back of the terminal 100 is also provided with the lens module 103, so that not only can a scene on the front side of the terminal 100 be shot, but also a scene on the back side of the terminal 100 can be shot, as long as the corresponding lens module is used in shooting.

It should be understood that the mounting position of the lens module 103 is merely illustrative. In some embodiments, when the lens module 103 is used as a front lens module, it can also be mounted at other positions on the terminal 100, such as the left side of the receiver, the middle position of the upper portion of the terminal 100, the lower portion (or chin) of the terminal 100, or four corners of the terminal 100; the lens module 103 may be installed at an upper middle position or an upper right corner of the rear surface of the terminal 100 when it is used as a rear lens module. In other embodiments, the lens module 103 may be disposed on a protruding edge of the main body of the terminal 100 instead of the main body of the terminal 100, or on a component that is movable or rotatable with respect to the terminal 100, such as extending, retracting, or rotating from the main body of the terminal 100. When the lens module 103 is rotatable relative to the terminal 100, the lens module 103 is equivalent to a front lens module and a rear lens module, that is, by rotating the same lens module 103, not only the scene on the front side of the terminal 100 can be shot, but also the scene on the back side of the terminal 100 can be shot. In other embodiments, when the display 101 can be folded, the lens module 103 can be used as a front lens module or a rear lens module, and the lens module 103 is used to capture the front view of the terminal 100 or the back view of the terminal 100 along with the folding of the display 101.

The number of the lens modules 103 is not limited in the embodiment of the application, and may be one, two, four or more, for example, the terminal 100 may have one or more lens modules 103 on the front surface, and may have one or more lens modules 103 on the back surface. The number of the lens modules is not limited, and the relative positions of the plurality of lens modules during setting are not limited. When a plurality of lens modules 103 are disposed, the plurality of lens modules 103 may be identical or different, for example, the plurality of lens modules 103 include different numbers of lenses, or different optical parameters of the lenses, or different positions of the lenses.

The lens module 103 can be used for shooting videos and/or photos and can be used for shooting scenes at different distances, for example, the lens module 103 can be used for shooting far scenes, near scenes and macro scenes. The embodiments of the present application are not particularly limited.

Optionally, the terminal 100 may further include a lens protection lens 104 for protecting the lens module 103. The lens protection lens 104 is disposed on the housing 102 and used for covering the lens module 103. When the lens protection lens 104 is used to protect the front lens module, the lens protection lens 104 may cover only the front lens module or the entire front surface of the terminal 100, wherein when the lens protection lens 104 covers the entire front surface of the terminal 100, the lens protection lens 104 may be used to protect the front lens module and the display screen 101 at the same time, and the lens protection lens 104 is Cover Glass (CG). When the lens protection lens 104 is used to protect the rear lens module, the lens protection lens 104 may cover the entire back surface of the terminal 100, or may be only disposed at a position corresponding to the rear lens module for protecting the rear lens module. The lens protection lens 104 may be made of glass, sapphire, ceramic, or the like, and the embodiment of the present application is not particularly limited. In some embodiments, the lens protection lens 104 is transparent, so that light outside the terminal 100 can enter the lens module 103 through the lens protection lens 104.

It should be noted that the front side of the terminal 100 described in the embodiments of the present application may be understood as a side surface of the terminal 100 facing the user when the user uses the terminal 100, and the back side of the terminal 100 may be understood as a side surface of the terminal 100 facing away from the user when the user uses the terminal 100.

It should be understood that the terminal 100 shown in fig. 1 is not limited to include the above devices, and may further include other devices, such as a battery, a flash, a fingerprint recognition module, an earphone, a key, a sensor, and the like, and the embodiment of the present application is only illustrated by taking the terminal mounted with the lens module 103 as an example, but the elements mounted on the terminal 100 are not limited thereto.

Fig. 2 shows a schematic view of the imaging principle. The light L reflected by the object is projected onto the surface of an image sensor (sensor)202 through an optical lens (lens)201 to generate an optical image, the optical image is then converted into an electrical signal, i.e. an analog image signal S1, the analog image signal S1 is converted into a digital image signal S2 through an analog-to-digital converter a/D (also referred to as an a/D converter) 203, the digital image signal S2 is processed by an image processor 204, e.g. a Digital Signal Processing (DSP), to form a compressed image signal S3, which can be stored in a memory 205 for processing, and finally the image is displayed through a display or a display screen.

The optical lens 201 affects the imaging quality and the imaging effect, and the light of the object passes through the optical lens 201, so that a clear image can be formed on a focusing plane, and the image of the object can be recorded through a photosensitive material or a photoreceptor. The optical lens 201 may be an integral body formed by one or more lenses, which may be plastic (plastic) lenses or glass (glass) lenses, spherical lenses or aspherical lenses, and refractive lenses or reflective lenses. The optical lens 201 in the embodiment of the present application is a zoom lens, and the focal length of the optical lens 201 can be adjusted by adjusting the relative position between the lenses of the optical lens 201.

The image sensor 202 is a semiconductor chip, and includes several hundreds of thousands to several millions of photodiodes on its surface, and when it is irradiated by light, it generates charges, which are converted into digital signals by the analog-to-digital converter chip. The image sensor 202 may be a Charge Coupled Device (CCD) or a complementary metal-oxide semiconductor (CMOS). The CCD image sensor is made of a semiconductor material having high sensitivity, and converts light into electric charges, which are converted into digital signals by an analog-to-digital converter chip. A CCD consists of many photosites, usually in mega pixels. When the CCD surface is irradiated by light, each photosensitive unit reflects charges on the component, and signals generated by all the photosensitive units are added together to form a complete picture. The CMOS is mainly made of two elements of silicon and germanium, so that N (charged-charged) and P (charged-charged) semiconductors coexist on the CMOS, and the current generated by the two complementary effects can be recorded and interpreted as an image by a processing chip. In some embodiments, the image sensor 202 may also be referred to as a photosensitive chip, a photosensitive element, or the like.

The image processor 204 is capable of optimizing the digital image signal through a series of complex mathematical algorithm operations, and finally transmitting the processed signal to the display. The image processor 204 may be an image processing chip or a digital signal processing chip (DSP), and is used to transmit the data obtained by the light sensing chip to the central processor in time and quickly and refresh the light sensing chip, so that the quality of the DSP chip directly affects the picture quality (such as color saturation, sharpness, etc.).

It should be understood that the term "lens" as used in the embodiments of the present application should be understood to mean a unitary lens comprising one or more lenses.

Fig. 3 shows a schematic cross-sectional view of a lens module. The lens module 200 can be the lens module 103 shown in fig. 1, and the structure of the lens module 200 will be briefly described with reference to fig. 3.

As shown in fig. 3, the lens module 200 may include an optical lens 201, a motor 3, a lens holder 4, an infrared cut filter (IRCF) 5, a sensor 6, a circuit board 7, and the like.

The optical lens 201 may be the optical lens 201 shown in fig. 2, and is used to image a subject on the object side on an image plane on the image side. The optical lens 201 includes a lens group 1 and a lens barrel 2. The lens group 1 comprises at least one lens, which may be different or identical. The lens set 1 is schematically shown in fig. 3 as comprising 3 lenses, but it is understood that the lens set 1 may comprise a greater or lesser number of lenses, for example 1, 2, 5, 8 or more.

The focal length of the lens group 1 can be adjusted, for example, the focal length of the lens group 1 can be adjusted by adjusting the relative position between the lenses of the lens group 1. In the embodiment of the present application, the focal length of the optical lens is the focal length of the lens group in the optical lens.

The lens barrel 2 is formed with an accommodating space, and the lens group 1 is accommodated in the accommodating space. The lens barrel 2 may be an integral body, and the lenses of the lens group 1 are accommodated in the integral lens barrel 2, but the relative positions of the lenses of the lens group 1 may be adjusted by other structures. The lens barrel 2 may also include a plurality of barrel portions, the lenses of the lens group 1 are grouped and disposed in the plurality of barrel portions, and the relative positions of the plurality of barrel portions may be adjusted, or the relative positions of the lenses may be adjusted. Therefore, it should be understood that the structure of the lens barrel 2, the connection manner of the lens group 1 and the lens barrel 2, and the like in fig. 2 are only exemplary, and do not limit the embodiments of the present application in any way.

The motor 3 may be used for Auto Focus (AF) and/or Optical Image Stabilization (OIS). The motor 3 is connected with the lens barrel 2, and the motor 3 can push the lens barrel 2 to move up and down in the focusing process so as to change the distance from the optical center of the lens group 1 to the imaging surface (namely, change the image distance) to obtain a clear image. Alternatively, the motor 3 may be a Voice Coil Motor (VCM). It should be understood that the position of the motor 3 is only schematically shown in the figure, and the specific structure of the motor is not limited in any way.

The lens holder 4 is used for supporting the lens module 200, when the lens module 200 is mounted on a terminal, the lens holder 4 is fixed relative to the terminal, the lens holder 4 can be connected to the motor 3, the motor 3 can move relative to the lens holder 4 to perform auto-focusing and/or optical anti-shake, wherein the movement of the motor 3 along the optical axis can be used for auto-focusing, the movement of the motor 3 along the direction perpendicular to the optical axis can be used for optical anti-shake, and in some embodiments, the movement of the motor 3 along the optical axis can be used for auto-focusing and optical anti-shake simultaneously. It should be noted that, in practical applications, a person skilled in the art may adopt other structures, for example, a certain lens barrel portion to simultaneously implement the function of the lens base 4, or the lens base 4 may have other modified structures, and is not limited to the structural forms listed in the embodiments of the present application.

The sensor 6 is the image sensor 202 shown in fig. 2, and for the detailed description, reference is made to the above, which is not repeated herein.

An infrared cut-off filter 5 is arranged between the lens group 1 and the sensor 6, so that unnecessary light projected onto the sensor 6 can be eliminated, the problems of ghost, stray light, color cast and the like of the sensor 6 during imaging are prevented, and the effective resolution and the color reducibility of the sensor are improved. In some embodiments, the infrared cut filter 5 is also referred to as blue glass. It should be understood that, in some lens modules, the filter provided herein may also be a filter that filters out other optical bands, and the embodiment of the present application is not limited to the infrared cut filter.

The wiring board 7 may be a Flexible Printed Circuit (FPC) or a Printed Circuit Board (PCB) for transmitting an electrical signal, wherein the FPC may be a single-sided flexible board, a double-sided flexible board, a multi-layer flexible board, a rigid flexible board, a hybrid-structured flexible circuit board, or the like.

In the lens module 200 shown in fig. 3, the lens assembly 1 is accommodated in the accommodating space of the lens barrel 2, the lens barrel 2 is connected to the motor 3, the motor 3 is connected to the lens base 4 and can move relatively to the lens base 4, the lens base 4 can be fixed on the circuit board 7, and the sensor 6 can be fixed on the circuit board 7 and electrically connected to the circuit board 7. The light reflected by the shot object generates an optical image through the lens group 1, the optical image can be projected onto the surface of the sensor 6, the sensor 6 converts the optical image into an electric signal, and the image is finally displayed through a display or a display screen by processing the electric signal.

The lens module 200 may further include a connector and peripheral electronic components (not shown), which are not described in detail herein.

As mentioned above, when the optical lens 201 is a zoom lens, the focal length of the optical lens 201 can be adjusted, so that the angle of view of the image can be changed to capture the objects at different distances. Generally, a zoom lens can easily adjust a short focal length, but a larger space for adjusting a lens is required to achieve adjustment of a long focal length, so that the geometric length of the optical lens 201 and the lens module 200 is usually long. When the zoom lens is applied to terminals such as mobile phones and smart watches, the zoom lens is limited by the thickness requirements of the terminals, and can only realize 3 times (3X) of long focus generally, and the effects of object amplification, background blurring and the like are not obvious. The requirement for longer focal length can only be realized by adding a periscopic structure of a prism, which is similar to a periscope and can turn the light path to realize long focus. When zooming is realized through the periscopic structure, one mode is realized through the combination switching of two modules of different focuses, and its structure is complicated, and is bulky, and another mode is on single periscopic structure's basis, additionally adds the focusing module, and its structure of zooming is more complicated. Therefore, how to realize zooming at a shorter optical thickness is an urgent problem to be solved.

The embodiment of the application provides an optical lens, which can realize a long focal length at a short optical thickness and can realize continuous zooming. The following describes an optical lens provided in an embodiment of the present application in detail with reference to the drawings.

It should be noted that the "optical lens" in the embodiments of the present application may also be expressed as an "optical system" in some embodiments.

Fig. 4 shows a schematic structural diagram of an optical lens provided in an embodiment of the present application. For convenience of description, the left side of the optical lens is defined as the object side, the surface of the lens facing the object side can be referred to as the object side, the right side of the optical lens is defined as the image side, and the surface of the lens facing the image side can be referred to as the image side. For convenience of understanding, the optical lens in fig. 4 and the following drawings only show the lens group, and the lens barrel is not shown.

As shown in fig. 4, the optical lens 201 includes a first lens group 11 and a second lens group 12, the first lens group 11 and the second lens group 12 are arranged in order from an object side to an image side, the first lens group 11 is located between the object side and the image side, and the second lens group 12 is located between the first lens group 11 and the image side. The first lens group 11 includes a first reflection surface 111 facing the image side, the second lens group 12 includes a second reflection surface 121 facing the object side, the second reflection surface 121 is opposite to the first reflection surface 111, and the first reflection surface 111 is used for receiving the light reflected by the second reflection surface 121. The first lens group 11 and the second lens group 12 can move relatively, for example, one of the first lens group 11 and the second lens group 12 is a fixed group, and the other of the first lens group 11 and the second lens group 12 can move relatively to the fixed group, so that the distance between the first reflective surface 111 and the second reflective surface 121 changes.

As shown in fig. 4, a beam of light reflected by the object (as shown in the figure, L1 is an upper beam of the beam of light, and L2 is a lower beam of the beam of light) first enters the second reflecting surface 121, then is reflected by the second reflecting surface 121 to reach the first reflecting surface 111, and finally converges on the image plane P after being reflected by the first reflecting surface 111, so that an image can be formed on the image plane P. In the embodiment of the present application, the first reflecting surface 111 and the second reflecting surface 121 are folded on the optical path, so that the thickness of the optical lens can be reduced, the long focal length can be realized, and the reduction of the spatial dimension can be realized. Specifically, assuming that the focal length of the optical lens 201 is f, the focal length f may approximately represent the total length of the optical path, where the total length of the optical path is the length of the path that the light ray starts to enter the incident surface of the optical lens 201 to the light ray reaches the imaging plane P. The reflection of light by the first and second

reflective surfaces

111 and 121 can collapse the optical path from the incident surface to the imaging surface, thereby enabling a long focal length to be achieved at a short optical thickness. The first lens group 11 and the second lens group 12 can move relatively, so that the distance between the first reflecting surface 111 and the second reflecting surface 121 changes, accordingly, the total length of the optical path from the incident surface to the imaging surface changes, and the focal length of the optical lens 201 also changes, thereby realizing continuous zooming. The optical lens is beneficial to realizing the miniaturization of the lens module, can meet the requirement of terminal lightening and thinning when being applied to the terminal, and has simple structure and greatly reduced assembly difficulty.

In a possible implementation manner, the first lens group 11 and the second lens group 12 may be designed to be coaxial, and the optical axes of the first lens group 11 and the second lens group 12 are coincident, and as seen in the drawing, the optical axis C is the optical axis of the first lens group 11 and the optical axis of the second lens group 12, that is, the optical axis C is the symmetry axis of the first lens group 11 and the second lens group 12. In order to focus the light on the image plane, the second reflective surface 121 should not block the light reflected by the first reflective surface 111, and therefore, the second reflective surface 121 may be configured as an annular surface through the inner ring of which the light reflected by the first reflective surface 111 can reach the image plane. When the first reflecting surface 111 is circular, the second reflecting surface 121 is annular, and the outer diameter of the annular shape is larger than the diameter of the circular shape.

In the embodiment of the present application, the first reflective surface 111 may be a planar reflective surface or a curved reflective surface. The second reflecting surface 121 may be a plane reflecting surface or a curved reflecting surface. When the first reflective surface 111 and the second reflective surface 121 are both planar reflective surfaces, the first reflective surface 111 and the second reflective surface 121 are not all perpendicular to the optical axis C. When the first reflecting surface 111 and/or the second reflecting surface 121 are curved reflecting surfaces, the arrangement of the first reflecting surface 111 and the second reflecting surface 121 is not particularly limited in the embodiment of the present application, and those skilled in the art can design the arrangement angles of the first reflecting surface 111 and the second reflecting surface 121 and the curvature of the curved surfaces according to actual requirements.

It should be understood that fig. 4 only shows an exemplary manner of placing the first reflective surface 111 and the second reflective surface 121 for showing the optical path, and the embodiment of the present application is not limited in any way. The angle arrangement of the first reflective surface 111 and the second reflective surface 121 according to fig. 4 can be understood as the tangential direction of the incident point position when the light is incident on the first reflective surface 111 and the second reflective surface 121. For example, in fig. 4, the second reflecting surface 121 is disposed at an angle to the optical axis C, and in practical applications, the second reflecting surface 121 may be disposed perpendicular to the optical axis C as a curved reflecting surface.

Optionally, in order to further reduce the optical thickness of the optical lens, one or more reflecting surfaces may be further disposed between the first reflecting surface 111 and the second reflecting surface 121, and the light is incident on the second reflecting surface 121, then passes through the disposed first reflecting surface 111 and the one or more reflecting surfaces, so that the light path may be continuously folded between the first reflecting surface 111 and the one or more reflecting surfaces, and finally reflected to the imaging surface P for imaging.

In order to correct the aberration, one or more refractive surfaces may be further included in the optical lens 201, and one or more of the one or more refractive surfaces may be aspheric or free-form surfaces. Fig. 5 shows a schematic structural diagram of another optical lens provided in an embodiment of the present application.

As shown in fig. 5, different from fig. 4, the first lens group 11 in the optical lens 201 further includes one or more first refractive elements 112, wherein each first refractive element 112 of the one or more first refractive elements 112 includes an object side surface 1121 and an image side surface 1122.

The object-side surface 1121 of the first refractive element 112 may be concave, convex or planar toward the object side, and the image-side surface 1122 of the first refractive element 112 may be convex, concave or planar toward the image side, but it should be understood that the object-side surface 1121 and the image-side surface 1122 of the one or more first refractive elements 112 are not all planar. It should be further understood that the number and shape of the first refractive elements 112, and the degree of the concave-convex of the object-side surface 1121 and the image-side surface 1122 are only illustrative, and do not limit the embodiments of the present application in any way.

Fig. 5 exemplarily shows that the first lens group 11 includes a first refractive element 112, and when the first refractive element 112 is the closest first refractive element from the one or more first refractive elements to the first reflective surface 111, the element where the first reflective surface 111 is located and the first refractive element 112 may alternatively be two elements, and the two elements are connected to fix the first reflective surface 111 on the first refractive element 112. The first reflective surface 111 may also be a portion of the first refractive element 112, i.e. a portion of the first refractive element 112 like the side surface 1122 is provided as the first reflective surface 111. When the first reflective surface 111 and the first refractive element 112 are circular, the diameter of the first reflective surface 111 is greater than or equal to one fifth of the diameter of the first refractive element 112, and less than or equal to four fifths of the diameter of the first refractive element 112, so that the first reflective surface 111 can well receive the light reflected by the second reflective surface 121, and the light transmitted by the first refractive element 112 is not completely blocked.

In this way, a beam of light reflected by the object (as shown in the figure, L1 is an upper beam of the beam of light, and L2 is a lower beam of the beam of light) first enters the object side surface 1121 of the first refractive element 112, enters the second reflective surface 121 after being refracted by the first refractive element 112, then reaches the first reflective surface 111 after being reflected by the second reflective surface 121, and converges on the imaging plane P after being reflected by the first reflective surface 111, so that an image can be formed on the imaging plane P, wherein the total length of the optical path is the length of a path from the start of the light entering the object side surface 1121 of the first refractive element 112 to the arrival of the light at the imaging plane P. In the embodiment of the present application, the first reflective surface 111 and the second reflective surface 121 are folded to the optical path, so that the thickness of the optical lens can be reduced and a long focal length can be achieved. The first lens group 11 and the second lens group 12 can move relatively, and the distance between the first reflection surface 111 and the second reflection surface 121 can be changed, so that the focal length of the optical lens 201 is changed, and continuous zooming is realized.

Fig. 6 shows a schematic structural diagram of another optical lens provided in an embodiment of the present application. As shown in fig. 6, unlike fig. 4, the optical lens 201 further includes a third lens group 13, and the third lens group 13 includes one or more lenses for correcting aberration.

The third lens group 13 may be disposed between the first lens group 11 and the second lens group 12, between the second lens group 12 and the image side, or at the same position as the second lens group 12. The position of the third lens group 13, the number of lenses, and the optical parameters of each lens can be set by those skilled in the art according to actual requirements.

In this way, a beam of light reflected by the object (as shown in the figure, L1 is an upper beam of the beam of light, and L2 is a lower beam of the beam of light) is incident on the second reflecting surface 121, then reaches the first reflecting surface 111 after being reflected by the second reflecting surface 121, passes through the third lens group 13 after being reflected by the first reflecting surface 111, and finally converges on the imaging plane P after being refracted by the third lens group 13, so that the image can be formed on the imaging plane P. In the embodiment of the present application, the thickness of the optical lens can be reduced and a long focal length can be achieved by folding and compressing the optical path by the first reflecting surface 111 and the second reflecting surface 121. The first lens group 11 and the second lens group 12 can move relatively, and the distance between the first reflection surface 111 and the second reflection surface 121 can be changed, so that the focal length of the optical lens 201 is changed, and continuous zooming is realized.

Fig. 7 shows a schematic structural diagram of another optical lens provided in an embodiment of the present application. Unlike fig. 5, the optical lens 201 further includes a third lens group 13, and the third lens group 13 includes one or more lenses for correcting aberration. This third lens group 13 is the same as described in fig. 6, with particular reference to the description above.

Illustratively, the third lens group 13 includes a second refractive element 131 and a third refractive element 132, the second refractive element 131 includes an object side surface 1311 and an image side surface 1312, and the third refractive element 132 includes an object side surface 1321 and an image side surface 1322.

The object-side surface 1311 of the second refractive element 131 facing the object side may be concave, convex, or planar, and the image-side surface 1312 of the second refractive element 131 facing the image side may be convex, concave, or planar. The object-side surface 1321 of the third refractive element 132 may be concave, convex, or planar, and the image-side surface 1322 of the third refractive element 132 may be convex, concave, or planar. The skilled person can design the second refraction element 131 and the second refraction element 132 accordingly according to actual needs, and the embodiments of the present application are not limited in particular,

it should be understood that the shapes of the second refractive element 131 and the third refractive element 132, and the degree of the concave-convex of the object-side surface and the image-side surface are only illustrative, and do not limit the embodiments of the present application in any way.

In this way, a beam of light reflected by the object to be photographed is incident on the object side surface 1121 of the first refraction element 112, is incident on the second reflection surface 121 after being refracted by the first refraction element 112, is reflected by the second reflection surface 121 to reach the first reflection surface 111, passes through the second refraction element 131 and the third refraction element 132 in the third lens group 13 after being reflected by the first reflection surface 111, and finally converges on the image plane P after being refracted, so that an image can be formed on the image plane P.

Fig. 7 also exemplarily shows two extreme positions of the field angle FOV of the optical lens 201, in which a bundle of parallel light rays represented by light rays L1 and L2 is converged at the bottom of the imaging plane P after passing through the optical lens 201, and a bundle of parallel light rays represented by light rays L1 'and L2' is converged at the top of the imaging plane P after passing through the optical lens 201.

In some embodiments, in order to correct the aberration, based on the optical lens structure shown in fig. 4 to 7, the second lens group 12 may also be provided with one or more refractive surfaces, for example, one or more refractive elements are provided in the inner ring of the annular second reflective surface 121, or the second lens group 12 includes one or more refractive elements, and a second reflective surface is provided on the object side surface of the refractive element closest to the first reflective surface 111 in the one or more refractive elements, so that the refractive element closest to the first reflective surface 111 can reflect the light and refract the light.

Alternatively, on the basis of the optical lens structures shown in fig. 4 to fig. 7, a filter may be further disposed between the optical lens 201 and the image plane P, the filter may be an infrared cut filter 5 or a filter that filters out other optical wavelength bands.

In the embodiment of the present application, the first reflective surface 111 and the second reflective surface 121 are folded to the optical path, so that the thickness of the optical lens can be reduced and a long focal length can be achieved. The first lens group 11 and the second lens group 12 can move relatively, and the distance between the first reflection surface 111 and the second reflection surface 121 can be changed, so that the focal length of the optical lens 201 is changed, and continuous zooming is realized.

In order to achieve continuous zooming, the first lens group 11 and the second lens group 12 need to move relatively, which can be achieved by fixing the second lens group 12 and moving the first lens group 11, by fixing the first lens group 11 and moving the second lens group 12, or by moving the first lens group 11 and the second lens group 12 simultaneously.

Taking the first lens group 11 as an example, fig. 8 exemplarily shows a schematic diagram of the optical lens in fig. 7 for continuous zooming. As shown in fig. 8, the second reflection surface 121 included in the second lens group 12 and the second refraction element 131 and the third refraction element 132 included in the third lens group 13 are fixed, the positions of the first reflection surface 111 and the first refraction element 112 included in the first lens group 11 shown by the solid line are set as first positions, the distance between the first reflection surface 111 and the second reflection surface 121 may be l1, the focal length of the optical lens 201 is set as f1, and the optical path diagram is shown by the light rays shown by the solid line. When the first lens group 11 is moved to the second position shown by the dotted line, the distance between the first reflection surface 111 and the second reflection surface 121 can be l2, and the focal length of the optical lens 201 changes to f2 due to the change in the distance between the first reflection surface 111 and the second reflection surface 121, and the optical path diagram is shown as the light ray shown by the dotted line. When the position of the first lens group 11 is continuously changed, the focal length of the optical lens 201 is continuously changed, so as to achieve the purpose of continuous zooming. If the first position and the second position are extreme positions of the first reflecting surface 111, when the first reflecting surface 111 is located at the first position, the focal length of the optical lens 201 is shortest, and at this time, the optical lens 201 may be said to be located at the wide-angle end, and when the first reflecting surface 111 is located at the second position, the focal length of the optical lens 201 is longest, and at this time, the optical lens 201 may be said to be located at the telephoto end. The process of moving the second lens group 12 to achieve continuous zooming is similar to that described above, and will not be described herein.

It should be noted that the distance between the first reflecting surface 111 and the second reflecting surface 121 can be understood as the distance between the tangent plane of the point of the first reflecting surface 111 on the optical axis thereof and the tangent plane of the point of the second reflecting surface 121 on the optical axis thereof, in the embodiment of the present application, when the first reflecting surface 111 and the second reflecting surface 121 are coaxial, the distance between the first reflecting surface 111 and the second reflecting surface 121 is the distance between the point of the first reflecting surface 111 on the optical axis C and the point of the second reflecting surface 121 on the optical axis C.

The movement of the first lens group 11 and/or the second lens group 12 can be achieved by the motor 3 to change the relative position between the first reflecting surface 111 and the second reflecting surface 121, or can be achieved by an additional motor or other structures.

The present invention provides a lens module, which will be described with reference to fig. 9 to 13.

Fig. 9 shows a schematic exploded view of a lens module according to an embodiment of the present application. As shown in fig. 9, the lens module 300 includes a first component 301, a second component 302, and a third component 303. The first component 301 includes the first lens group 11, the second component 302 includes the second lens group 12, in the case that the optical lens includes the third lens group 13, the second component 302 further includes the third lens group 13, and the third component 303 is a photosensitive element on which the optical lens can image the scene of the object side. The first lens group 11 includes the first reflective surface 111, the second lens group 12 includes the second reflective surface 121, and the first lens group 11 is movable relative to the second lens group 12. The first component 301 is connected to the second component 302 and the second component 302 is connected to the third component 303. A schematic assembly view of the lens module 300 is shown in fig. 10.

Alternatively, the first component 301, the second component 302 and the third component 303 may be connected by bonding, welding, riveting, screwing, snapping, or the like. For example, in the embodiment of the present application, the first component 301 and the second component 302, and the second component 302 and the third component 303 may be connected by an adhesive 304.

The components of the lens module 300 will be described with reference to fig. 11 to 13.

Fig. 11 shows a schematic exploded view of the first component 301 of the lens module 300 shown in fig. 9. As shown in fig. 11, the first assembly 301 includes a first barrel portion 21, a first lens group 11, a first retainer 81 and a motor 3, the first barrel portion 21 is formed with a receiving space for receiving the first lens group 11, and the first retainer 81 is disposed on an inner wall of the first barrel portion 21 for fixing the first lens group 11 to the first barrel portion 21. The motor can move along the optical axis direction, and the first barrel portion 21 is connected to the motor 3, so that the motor 3 can drive the first barrel portion 21 and the first lens group 11 accommodated in the accommodating space of the first barrel portion 21 to move. For example, the first barrel portion 21 may be provided on a movable member of the motor 3.

The shape and size of the first barrel portion 21 are adapted to the shape and size of the first lens group 11, for example, if the first lens group 11 is circular, the inner wall of the first barrel portion 21 is circular, so as to match the shape of the first lens group 11, and the first lens group 11 is assembled in the accommodating space of the first barrel portion 21. The shape and size of the first retainer ring 81 are adapted to the shape and size of the first barrel portion 21, and can function to fix the first lens group 11 in the first barrel portion 21. It should be understood that, those skilled in the art can design the shape and size of the first barrel portion 21 and the first retaining ring 81 accordingly according to the shape of the first lens group 11, and the embodiment of the present application is not limited in detail herein. The motor 3 may be an existing voice coil motor, and those skilled in the art may also specifically design the structure of the voice coil motor according to actual needs, which is not specifically limited herein.

In this embodiment of the application, the number of the first retaining rings 81 is not limited to one, and a person skilled in the art may set a plurality of first retaining rings 81 according to actual requirements, for example, the first assembly 301 may include 2, 3, 4, or more first retaining rings 81, and this embodiment of the application is not specifically limited.

Fig. 12 shows a schematic exploded view of the second component 302 of the lens module 300 shown in fig. 9. As shown in fig. 11, the second assembly 302 includes the second lens group 12, the third lens group 13, the second barrel portion 22, the second stop 82, and the third stop 83. The second barrel portion 22 is formed with an accommodating space, and the second lens group 12 and the third lens group 13 are accommodated in the accommodating space formed by the second barrel portion 22. The second retainer ring 82 and the third retainer ring 83 are disposed on the inner wall of the second barrel portion 22, and are used to fix the second lens group 12 and the third lens group 13 to the second barrel portion 22, respectively.

Alternatively, the inner wall of the second barrel portion 22 may be provided with a step for positioning and limiting the second lens group 12 and the third lens group 13. The shape of the second barrel portion 22 may be adapted to the shape of the motor 3 to facilitate the connection of the shape of the first barrel portion 22 with the motor 3, thereby enabling the connection of the first component 301 with the second component 302. For example, the housing of the motor 3 has a substantially inner circular and outer square shape, wherein the inner circle of the motor is used for matching with the first barrel part 21, and the second barrel part 22 may have a substantially inner circular and outer square shape, wherein the inner circle of the second barrel part 22 is used for fixing the second lens group 12 and the third lens group 13, and the outer circle of the second barrel part 22 is used for connecting with the housing of the motor 3. It should be understood that, those skilled in the art can design the second barrel portion 22 of the second assembly 302 according to actual requirements and the shape and size of the first assembly 301, and the embodiments of the present application are not limited in particular.

It should be understood that in the embodiment of the present application, the number of the second rings 82 may be one or more, and the number of the third rings 83 may be one or more.

Fig. 13 shows a schematic exploded view of the third component 303 of the lens module 300 shown in fig. 9. As shown in fig. 13, the third component 303 includes the infrared cut filter 5, a holder 51 for holding the infrared cut filter 5, a sensor 6, a wiring board 7, a connector 9, and the like, the sensor 6 being disposed between the infrared cut filter 5 and the wiring board 7. The infrared cut filter 5 is connected to the holder 51. The sensor 6 is connected to a circuit board 7. The holder 51 to which the infrared cut filter 5 is attached is connected to the wiring board 7. The connector 9 is connected to the wiring board 7.

For example, as shown in fig. 13, the infrared cut filter 5 may be fixed to the bracket 51 by an adhesive 304, the sensor 6 may be fixed to the circuit board 7 by the adhesive 304, and the bracket 51 may be connected to the circuit board 7 by the adhesive 304. It should be understood that the connection of the sensor 6 to the circuit board 7 includes both mechanical and electrical connections, that the adhesive 304 may be used to mechanically connect the sensor 6 to the circuit board 7, and that the sensor 6 and circuit board 7 may be electrically connected by contacts, pins, etc.

It should be understood that the third assembly 303 in the embodiment of the present application includes, but is not limited to, the above components, and may also include other electronic components, which are not described in detail herein.

In the lens module of the embodiment of the present application, the second lens group 12 and the third lens group 13 are fixed in a lens barrel, and the first lens group 11 including the first reflective surface 111 can be driven by a motor, so as to change the interval between the optical surfaces and achieve zooming. The first lens group 11 is driven by a motor, and the OIS and AF structures which are separated independently do not need to be arranged, so that the zooming structure is simple. The first reflecting surface 111 and the second reflecting surface 121 can fold and compress the optical path, can realize long focus under a short optical thickness, and is beneficial to realizing the miniaturization of an optical lens and a lens module. The second assembly 302 including the second lens group and the third lens group 13 can also be integrally packaged with the third assembly 303 including the imaging surface, and the structure is simple, which is beneficial to mass production.

It should be noted that the second lens group 12 may also be driven by a motor to move to achieve continuous zooming, in this case, the second lens group 12 and the third lens group 13 may be disposed in separate lens barrel portions, and those skilled in the art may design the lens barrel portions accordingly according to actual requirements, which will not be described in detail herein.

As shown in fig. 14, the lens module 300 includes a first component 301, a second component 302 and a third component 303, the first component 301 includes the first lens group 11, the second component 302 includes the second lens group 12 and the third lens group 13, the first component 301 is connected to the second component 302, and the second component 302 is connected to the third component 303. A schematic assembly view of the lens module 300 is shown in fig. 15.

Unlike the lens module shown in fig. 9, the second assembly 302 is slightly different from the third assembly 303. The following description will be made with reference to fig. 16 and 17.

Fig. 16 shows a schematic exploded view of the second component 302 of the lens module 300 shown in fig. 14. As shown in fig. 16, the second assembly 302 includes a second lens group 12, a third lens group 13, a second barrel portion 22, a second retainer 82 and a third retainer 83, and unlike the second assembly 302 included in the lens module shown in fig. 9, the second assembly 302 included in the lens module shown in fig. 14 further includes an infrared cut filter 5, and the infrared cut filter 5 is connected to the second barrel portion 22. Illustratively, the infrared cut filter 5 may be fixed to the second barrel portion 22 by an adhesive 304. Accordingly, the inner wall of the second barrel portion 22 may be provided with a protrusion, and the infrared cut filter 5 is connected to the protrusion through the adhesive 304.

Fig. 17 shows a schematic exploded view of the third component 303 of the lens module 300 shown in fig. 14. As shown in fig. 17, the lens module shown in fig. 14 includes the third assembly 303 not including the infrared cut filter 5 and the holder 51, unlike the third assembly 303 included in the lens module shown in fig. 9, because the infrared cut filter 5 is provided on the second barrel part 22, the holder 51 for supporting the infrared cut filter 5 may be omitted. The related description of other components and the zooming principle refer to the above description and are not repeated herein.

The lens module that this application embodiment provided passes through motor 3 and drives first lens group 11, can change the relative position of first lens group 11 and second lens group 12 to, first plane of reflection 111 that first lens group 11 included and 121 that second lens group 12 included can fold the light path, make light turn back the incidence, thereby can realize zooming in succession at the tele end, simplified overall structure, realized the miniaturization.

It should be noted that the lens barrel module 300 shown in fig. 9 to 17 may correspond to the optical lens 201 shown in fig. 7 and the optical lens 201 shown in fig. 4 to 6, the lens barrel module may include the first component 301, the second component 302 and the third component 303 shown in fig. 9, and the first lens barrel portion 21 in the first component 301 and the second lens barrel portion 22 in the second component 302 need to be designed correspondingly for the first lens group 11, the second lens group 12 and the third lens group 13, so as to fix the first lens group 11, the second lens group 12 and the third lens group 13 of the optical lens 201 shown in fig. 4 to 6 in the corresponding lens barrel, which will not be described in detail herein.

In the above embodiment, the first lens module 11 and the second lens module 12 in the optical lens 201 are designed to be coaxial, that is, the first reflective surface 111 and the second reflective surface 121 are coaxial, and the first reflective surface 111 blocks the light incident on the second reflective surface 121, resulting in low image brightness on the image plane. In order to eliminate the blocking of the first reflection surface 111 to the incident light, the embodiment of the present application provides another optical lens, in the optical lens, the first reflection surface 111 and the second reflection surface 121 are designed to be off-axis, that is, a preset distance is provided between the optical axis of the second lens group 12 and the optical axis of the first lens group 11, so that the light incident to the optical lens can be partially or completely incident to the second reflection surface 121.

Fig. 18 is a schematic structural diagram illustrating another optical lens provided in an embodiment of the present application. As shown in fig. 18, the optical lens 201 includes a first reflection surface 111 and a second reflection surface 121, wherein an optical axis C1 of the first reflection surface 111 is different from an optical axis C2 of the second reflection surface 121. Specifically, the distance between the optical axis C1 of the first reflecting surface 111 and the optical axis C2 of the reflecting surface 121 is such that all the light rays within the angle of view of the optical lens 201 can be incident on the second reflecting surface 112 first and then reflected on the first reflecting surface 111, and the first reflecting surface 111 does not block the light rays within the angle of view of the optical lens. For example, the first reflecting surface 111 and the second reflecting surface 121 may be both circular, and the predetermined distance is not less than the sum of the radius of the first reflecting surface 111 and the radius of the second reflecting surface 121.

In the case of off-axis design of the optical lens, zooming can be achieved by moving the first reflecting surface 111, zooming can be achieved by moving the second reflecting surface 121, and zooming can be achieved by moving the first reflecting surface 111 and the second reflecting surface 121.

Illustratively, fig. 19 shows a schematic diagram of a method for implementing zooming, in which the first reflecting surface 111 is fixed and the second reflecting surface 121 is moved to implement the change of the focal length of the optical lens. As shown in fig. 19, the position of the second reflective surface 121 shown by a solid line can be set as a first position, the schematic optical path diagram is shown by a solid line in the figure, and all the light rays within the field angle of the optical lens are firstly incident on the second reflective surface 121, then reflected onto the first reflective surface 111 by the second reflective surface 121, and finally focused on the image plane P. When the second reflecting surface 121 moves to the second position, i.e. at the second reflecting surface 121 shown by the dotted line in the figure, the optical path diagram is shown by the dotted line in the figure. The first reflective surface 111 does not block light incident on the second reflective surface 121 during the movement of the second reflective surface 121 from the first position to the second position. If the first position and the second position are extreme positions of the second reflecting surface 121, when the second reflecting surface 121 is located at the first position, the focal length of the optical lens is shortest, and at this time, the optical lens may be said to be located at the wide-angle end, and when the second reflecting surface 121 is located at the second position, the focal length of the optical lens is longest, and at this time, the optical lens may be said to be located at the telephoto end.

Fig. 20 shows another schematic diagram for realizing zooming, in which the second reflecting surface 121 is fixed, and the change of the focal length of the optical lens can be realized by moving the first reflecting surface 111. As shown in fig. 20, the position of the first reflective surface 111 shown by the solid line can be set as a first position, the schematic optical path diagram is shown by the solid line in the figure, and all the light rays within the field angle of the optical lens are firstly incident on the second reflective surface 121, then reflected onto the first reflective surface 111 by the second reflective surface 121, and finally focused on the image plane P. When the first reflecting surface 111 moves to the second position, i.e. the position of the first reflecting surface 111 shown by the dotted line in the figure, the schematic diagram of the optical path is shown by the dotted line in the figure. During the movement of the first reflective surface 111 from the first position to the second position, the first reflective surface 111 does not block the light incident on the second reflective surface 121. When the first position and the second position are extreme positions of the first reflecting surface 111, when the first reflecting surface 111 is located at the first position, the focal length of the optical lens is shortest, and at this time, the optical lens may be said to be located at the wide-angle end, and when the first reflecting surface 111 is located at the second position, the focal length of the optical lens is longest, and at this time, the optical lens may be said to be located at the telephoto end.

It should be understood that the shapes of the first reflective surface 111 and the second reflective surface 121 in fig. 19 and 20 are merely exemplary, and are only for explaining that the first reflective surface 111 does not block the light incident on the second reflective surface 121 when the first reflective surface 111 or the second reflective surface 121 is moved, and the embodiments of the present application are not limited thereto. The angle of the first reflecting surface 111 and the second reflecting surface 121 is merely exemplary, and is only for clearly showing the optical path, and is not to be construed as limiting the embodiments of the present application.

It is also understood that the telephoto end and the wide-angle end of the optical lens in fig. 19 and 20 are also merely exemplary, and the focal length of the optical lens (i.e., the combined focal length) is determined by the focal length of the individual lenses constituting the optical lens and the distance between the respective lenses. In practical applications, a person skilled in the art may determine the position of the first reflecting surface 111 or the second reflecting surface 121 according to the curvature, the distance, and other parameters of the first reflecting surface 111 and the second reflecting surface 121, so that the optical lens is located at the wide-angle end and the telephoto end. The description of the tele end and the wide end in fig. 8 is similar and will not be repeated.

In the embodiment of the present application, the optical axis of the first lens group 11 can also be understood as the optical axis of the first reflection surface 111, and the optical axis of the second lens group 12 can also be understood as the optical axis of the second reflection surface 121. The first lens group 11 moves relative to the second lens group 12, i.e. the first reflective surface 111 and the second reflective surface 121 move relative to each other.

In the description of the present application, it should be noted that, unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; either directly or indirectly through intervening media, or may be interconnected between two elements. The above terms are specifically understood in the present application by those of ordinary skill in the art.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A lens module, comprising: the optical lens is used for imaging scenes on an object side on the photosensitive assembly;

the optical lens comprises a lens barrel and a lens group accommodated in the lens barrel;

the lens group comprises in order from an object side to an image side:

a first lens group comprising at least one first reflective surface facing the image side;

a second lens group including at least one second reflective surface facing the object side opposite to the first reflective surface for reflecting the received light toward the first reflective surface;

the first reflecting surface and the second reflecting surface are both circular, a preset distance is arranged between the optical axis of the second lens group and the optical axis of the first lens group, and the preset distance is not less than the sum of the radius of the first reflecting surface and the radius of the second reflecting surface, so that all light rays incident to the optical lens can be incident to the second reflecting surface;

the lens module further comprises a motor, and the motor is connected with the first lens group or the second lens group to drive the first lens group or the second lens group to move along the optical axis direction.

2. The lens module as recited in claim 1, wherein the set of lenses further comprises at least one refractive surface.

3. The lens module as recited in claim 2, wherein one or more of the at least one refracting surface is a free-form surface.

4. The lens module as claimed in any one of claims 1 to 3, wherein the barrel includes a first barrel portion and a second barrel portion separated from each other, the first barrel portion being configured to receive the first lens group, the second barrel portion being configured to receive the second lens group, the first barrel portion being connected to the motor or the second barrel portion being connected to the motor.

5. The lens module as recited in any one of claims 1 to 3, wherein the lens group further comprises a third lens group comprising one or more refractive surfaces.

6. The lens module as claimed in claim 5, wherein the third lens group is received in the second barrel portion when the optical axes of the first and second lens groups are coincident.

7. The lens module as claimed in any one of claims 1 to 3, wherein the first and/or second reflective surfaces are curved reflective surfaces.

8. An optical lens is characterized by comprising a lens barrel and a lens group accommodated in the lens barrel;

the lens group comprises in order from an object side to an image side:

one of the first lens group and the second lens group is a fixed group, and the other of the first lens group and the second lens group is movable relative to the fixed group.

9. The optical lens of claim 8 wherein the set of lenses further includes at least one refractive surface.

10. An optical lens according to claim 9, characterized in that one or more of the at least one refractive surface is a free-form surface.

11. An optical lens barrel according to any one of claims 8 to 10, wherein the lens barrel includes a first barrel portion for housing the first lens group and a second barrel portion for housing the second lens group, which are separated from each other.

12. An optical lens according to any one of claims 8 to 10 wherein the lens group further comprises a third lens group comprising one or more refractive surfaces.

13. An optical lens barrel according to claim 12, wherein the third lens group is accommodated in the second barrel portion when the optical axes of the first lens group and the second lens group are coincident.

14. An optical lens according to any one of claims 8 to 10, characterized in that the first reflecting surface and/or the second reflecting surface is a curved reflecting surface.

15. A terminal, characterized by comprising a lens module according to any one of claims 1 to 7 or an optical lens according to any one of claims 8 to 14.