CN116708983B - Lens module, camera module and electronic equipment - Google Patents

Lens module, camera module and electronic equipment Download PDF

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Publication number
CN116708983B
CN116708983B CN202310972141.9A CN202310972141A CN116708983B CN 116708983 B CN116708983 B CN 116708983B CN 202310972141 A CN202310972141 A CN 202310972141A CN 116708983 B CN116708983 B CN 116708983B
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CN
China
Prior art keywords
lens
prism
lenses
light
image sensor
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Active
Application number
CN202310972141.9A
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Chinese (zh)
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CN116708983A (en
Inventor
郑耀辉
丁喆
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Honor Device Co Ltd
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Honor Device Co Ltd
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Priority to CN202310972141.9A priority Critical patent/CN116708983B/en
Publication of CN116708983A publication Critical patent/CN116708983A/en
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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/50—Constructional details
    • H04N23/55—Optical parts specially adapted for electronic image sensors; Mounting thereof
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B13/00—Viewfinders; Focusing aids for cameras; Means for focusing for cameras; Autofocus systems for cameras
    • G03B13/32—Means for focusing
    • G03B13/34—Power focusing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/02—Constructional features of telephone sets
    • H04M1/0202—Portable telephone sets, e.g. cordless phones, mobile phones or bar type handsets
    • H04M1/026—Details of the structure or mounting of specific components
    • H04M1/0264—Details of the structure or mounting of specific components for a camera module assembly
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/50—Constructional details
    • H04N23/54—Mounting of pick-up tubes, electronic image sensors, deviation or focusing coils
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/57—Mechanical or electrical details of cameras or camera modules specially adapted for being embedded in other devices
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/60—Control of cameras or camera modules
    • H04N23/67—Focus control based on electronic image sensor signals

Abstract

The embodiment of the application provides a lens module, a camera module and electronic equipment, wherein the lens module comprises: at least two lenses, wherein the lenses are long-focus lenses and the focal lengths of the at least two lenses are different; the light guide module can enable emergent light rays of at least two lenses to be transmitted to the same image sensor, and enables emergent light rays of one lens to be transmitted to the image sensor when the light guide module transmits light rays. The lens module realizes optical zooming through at least two lenses and the light guide module, and improves the resolution of imaging of the lens module, thereby improving the imaging quality of the lens module; by means of at least two lens combination modes, the focal length of at least two lenses is reasonably set, the zoom ratio of the lens module is improved, and long-focal-length optical zooming can be achieved.

Description

Lens module, camera module and electronic equipment
Technical Field
The application relates to the field of accessories of electronic equipment, in particular to a lens module, a camera module and the electronic equipment.
Background
Currently, common zooming modes of electronic devices such as mobile phones, tablet computers and the like mainly comprise digital zooming and optical zooming.
Digital zooming can result in pixel loss, lower resolution of the image, and poor imaging quality. The optical zoom can improve the imaging quality, but the adjustable range of the focal length of the lens is smaller, namely the zoom ratio of the lens is smaller, and the optical zoom function with long focal length is harder to realize.
Disclosure of Invention
The application provides a lens module, a camera module and electronic equipment, which are used for realizing zooming and improving the imaging quality and the zoom ratio of the lens module.
In order to achieve the above purpose, the present application provides the following technical solutions:
in a first aspect, the present application provides a lens module, including: at least two lenses, wherein the lenses are long-focus lenses, and the focal lengths of the at least two lenses are different; the light guide module can enable emergent light rays of at least two lenses to be transmitted to the same image sensor, and enables emergent light rays of one lens to be transmitted to the image sensor when the light guide module transmits light rays.
From the above, it can be seen that: the lens module realizes optical zooming through at least two lenses and the light guide module, and improves the resolution of imaging of the lens module, thereby improving the imaging quality of the lens module; by means of at least two lens combination modes, the focal length of at least two lenses is reasonably set, the zoom ratio of the lens module is improved, and long-focal-length optical zooming can be achieved.
In one possible embodiment, the light guide module is movably disposed at the image side of the lens.
From the above, it can be seen that: the light guide module is realized by moving: when the emergent light rays of at least two lenses are transmitted to the same image sensor and the light guide module transmits the light rays, the emergent light rays of one lens are transmitted to the image sensor, so that the structure of the light guide module can be simplified, and the cost of the light guide module is reduced.
In one possible embodiment, the light guide module moves in a rotating manner.
From the above, it can be seen that: the light guide module is realized through rotation: when the emergent light rays of at least two lenses are transmitted to the same image sensor and the light guide module transmits the light rays, the emergent light rays of one lens are transmitted to the image sensor, so that the moving mode of the light guide module is simplified, the structure of the lens module is simplified, and the cost of the lens module is reduced.
In one possible embodiment, the rotation axis of the light guide module and the optical axis of the image sensor are arranged co-linearly.
From the above, it can be seen that: the rotation axis of the light guide module and the optical axis of the image sensor are arranged in a collinear manner, so that the optical axis of the image side surface of the light guide module and the optical axis of the image sensor are collinear, and the imaging quality of the camera module is guaranteed.
In one possible embodiment, the light guide module comprises a prism or a plane mirror.
In one possible embodiment, the light guide module includes: a fixing unit, and at least two shutters; the fixing unit is fixedly arranged on the image side of the lenses and used for enabling emergent rays of at least two lenses to be transmitted to the same image sensor; the shutter is arranged on the lens and controls the opening and closing of the lens.
From the above, it can be seen that: the cooperation of the fixing unit and at least two shutters can be realized: when the emergent light rays of at least two lenses are transmitted to the same image sensor and the light guide module transmits the light rays, the emergent light rays of one lens are transmitted to the image sensor. Because the fixing unit is fixedly arranged, the whole lens module does not need to move optical elements, and the reliability and stability of the whole lens module are improved; meanwhile, the structure of the lens module is simplified, the cost of the lens module is reduced, and the yield of the lens module is improved.
In one possible implementation manner, the number of lenses is two, namely a first lens and a second lens; the fixing unit is a cubic beam splitter prism, and the cubic beam splitter prism comprises a first inclined plane and a second inclined plane; the first inclined plane is used for enabling emergent rays of the first lens to be transmitted to the image sensor, and the second inclined plane is used for enabling emergent rays of the second lens to be transmitted to the image sensor.
From the above, it can be seen that: the cube beam splitting prism can simultaneously realize that emergent rays of the first lens and the second lens are transmitted to the image sensor, so that the structure of the fixing unit is simplified, and the cost of the fixing unit is reduced.
In one possible embodiment, both the first slope and the second slope are provided with a semi-permeable semi-reflective membrane.
From the above, it can be seen that: the first inclined plane and the second inclined plane are both provided with semi-transparent and semi-reflective films, so that light rays are transmitted to the first inclined plane, half of the light rays are reflected, and half of the light rays are transmitted; correspondingly, the light propagates to the second inclined plane, half of the light is reflected, and half of the light is transmitted. In this way, under the condition that the first inclined plane and the second inclined plane are provided with the coincident lines, the imaging quality of the lens module is ensured.
In one possible embodiment, the shutter is located between two optical elements of the lens, the shutter is located on the object side of the lens, or the shutter is located on the image side of the lens.
In one possible embodiment, the lens includes a lens group having positive optical power and capable of imaging; in at least one lens, an included angle is formed between the optical axis of the lens group and the axis of the light transmission hole corresponding to the lens group; the at least one lens further comprises a deflection unit, wherein the deflection unit is positioned at the object side of the lens group and is used for deflecting the light entering from the light holes to reach the object side of the lens group by a first preset angle.
In one possible embodiment, the deflection unit of at least one lens has positive optical power; and/or the deflection unit is a prism.
From the above, it can be seen that: the deflection unit of at least one lens has positive focal power, and light rays are converged to a certain extent after passing through the deflection unit with positive focal power, so that the converging effect of the lens group can be reduced, the focal power of the lens group can be reduced, the thickness of the lens in the lens group can be reduced, and the volume of the lens group can be reduced; meanwhile, the deflection unit with positive focal power has a converging effect on light rays, which is beneficial to reducing the volume of optical elements behind the deflection unit; in addition, the focal length of the lens where the deflection unit is located can be increased, and the zoom ratio of the lens module can be increased.
In one possible embodiment, the light transmission hole has an included angle between the axis and the optical axis of the lens group, and the axis of the light transmission hole is parallel to the optical axis of the image sensor; the light guide module is also used for enabling emergent light rays of the lens group with included angles between the optical axis and the axes of the light holes to deflect a second preset angle to reach the image sensor.
From the above, it can be seen that: under the condition that the light hole is arranged on the rear cover of the electronic equipment, the image sensor can be horizontally arranged in the electronic equipment, so that the pixel of the image sensor is improved, the resolution of the image sensor is improved, and the imaging quality of the camera module is improved; the thickness of the electronic equipment is also reduced, the volume of the electronic equipment is reduced, and the miniaturization requirement of the electronic equipment is met.
In a second aspect, the present application provides a camera module, including an image sensor and a lens module as set forth in the first aspect or any one of the possible embodiments, where the image sensor is located on an image side of the lens module.
From the above, it can be seen that: the camera module of the present application includes the lens module set forth in the first aspect or any one of the possible embodiments, so that the camera module with the lens module also has all the above technical effects, which are not described herein again.
In a third aspect, the present application provides an electronic device, comprising an image processor and a camera module as set forth in the second aspect or any one of the possible embodiments; the image processor is in communication connection with the camera module, and is used for acquiring image data from the camera module and processing the image data.
From the above, it can be seen that: the electronic device of the present application includes the camera module set forth in the second aspect or any one of the possible embodiments, so that the electronic device having the camera module also has all the above technical effects, which are not described herein again.
In one possible implementation, the image processor and the camera module are both disposed inside the electronic device; wherein, the thickness direction of the image sensor is parallel to the thickness direction of the electronic device; and/or the shell of the electronic equipment is provided with light holes corresponding to the lenses one by one.
From the above, it can be seen that: the thickness direction of the image sensor is parallel to the thickness direction of the electronic equipment, so that the image sensor is horizontally placed in the electronic equipment, the imaging quality of the camera module is improved, the thickness of the electronic equipment is reduced, and the miniaturization requirement of the electronic equipment is met; the shell of the electronic equipment is provided with the light holes corresponding to the lenses one by one, so that at least two lenses share one light guide module and one image sensor, the structure of the camera module is simplified, and the cost of the camera module is reduced.
Drawings
Fig. 1 is a front view of an electronic device according to an embodiment of the present application;
FIG. 2 is a schematic view of a portion of the structure of the cross-sectional view taken along the direction A-A of FIG. 1;
FIG. 3 is a schematic view of a portion of the structure of the B-B cross-sectional view of FIG. 1;
fig. 4 is an isometric view of a structure of a camera module according to an embodiment of the present application;
FIG. 5 is another isometric view of the camera module of FIG. 4;
fig. 6 is a front view of a structure of a camera module according to an embodiment of the present application;
FIG. 7 is a cross-sectional view taken along the direction C-C of FIG. 6;
FIG. 8 is another cross-sectional view taken in the direction C-C of FIG. 6;
FIG. 9 is a D-D sectional view of FIG. 6;
Fig. 10 is a front view of another structure of a camera module according to an embodiment of the present application;
FIG. 11 is a schematic diagram of a first inclined plane of a fixed prism for transmitting incident light to the camera module according to an embodiment of the present application;
fig. 12 is a light path diagram of incident light propagating to a second inclined plane of the fixed prism in the camera module according to the embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. The terminology used in the following examples is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in the specification of the application and the appended claims, the singular forms "a," "an," "the," and "the" are intended to include, for example, "one or more" such forms of expression, unless the context clearly indicates to the contrary. It should also be understood that in embodiments of the present application, "one or more" means one, two, or more than two; "and/or", describes an association relationship of the association object, indicating that three relationships may exist; for example, a and/or B may represent: a alone, a and B together, and B alone, wherein A, B may be singular or plural. The character "/" generally indicates that the context-dependent object is an "or" relationship.
Reference in the specification to "one embodiment" or "some embodiments" or the like means that a particular feature, structure, or characteristic described in connection with the embodiment is included in one or more embodiments of the application. Thus, appearances of the phrases "in one embodiment," "in some embodiments," "in other embodiments," and the like in the specification are not necessarily all referring to the same embodiment, but mean "one or more but not all embodiments" unless expressly specified otherwise. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless expressly specified otherwise.
The plurality of the embodiments of the present application is greater than or equal to two. It should be noted that, in the description of the embodiments of the present application, the terms "first," "second," and the like are used for distinguishing between the descriptions and not necessarily for indicating or implying a relative importance, or alternatively, for indicating or implying a sequential order.
"parallel" and "perpendicular" as referred to in the present application are "substantially parallel" and "substantially perpendicular" in actual operation.
For ease of understanding, the technical terms involved in the present application are explained and described first.
The optical power, equal to the difference between the convergence of image Fang Guangshu and the convergence of the object beam, characterizes the ability of the optical system to deflect light, i.e., the refractive power of the optical system to the incident parallel beam. The optical power has positive and negative components. In the case where the optical power of the optical system is positive, the refraction of the incident parallel light beam is convergent; in the case where the optical power of the optical system is negative, the refraction of the incident parallel beam is divergent; in the case where the optical power of the optical system is zero, the incident parallel light beam is not refracted.
A lens or group of lenses having positive optical power, the lens or group of lenses having the effect of converging light rays.
Focal length, also known as focal length. Focal length is a measure of the concentration or divergence of light in an optical system, which refers to the perpendicular distance from the optical center of a lens or lens group to the focal plane when a scene at infinity is brought into a clear image at the focal plane by the lens or lens group. From a practical point of view it is understood that the distance from the centre of the lens to the plane is at infinity.
The equivalent focal length refers to the focal length of the 35mm camera lens corresponding to the actual focal length of the camera module where the image sensor is located when the diagonal length of the image area of the image sensor is equivalent to the diagonal length (42.27 mm) of the 35mm camera frame.
The zoom ratio refers to the ratio of the maximum focal length of the lens to the minimum focal length of the lens.
The object side surface is defined by a lens (prism), the object side is the side where the object is located, and the surface of the lens (prism) close to the object side is called the object side surface.
The image side surface is defined by a lens (prism), the image side of the image of the subject is the image side, and the surface of the lens (prism) close to the image side is called the image side surface.
Currently, common zooming modes of electronic devices such as mobile phones, tablet computers and the like mainly comprise digital zooming and optical zooming.
The digital zooming is to enlarge the area of each pixel in the picture by the processor, thereby achieving the purpose of enlargement. Digital zooming causes pixel loss, and the resolution of the image is low, resulting in poor imaging quality.
Optical zooming is the zooming in and out of a subject to be photographed by moving an optical element. The optical zoom can improve the imaging quality, but the adjustable range of the focal length of the lens is smaller because the focal length of the lens is changed by moving the optical element, namely, the zoom of the lens is smaller, and the long-focal-length optical zoom function is difficult to realize. In addition, all optical elements in the lens are on one optical path, so that the structure is complex, and the yield is low; the need to move multiple optical elements to change the lens angle often results in a more complex structure, lower yield and higher cost.
In view of the above problems, the embodiment of the application discloses a lens module, a camera module and electronic equipment, which can realize zooming and improve the imaging quality and the zoom ratio of the lens module.
The electronic device may be a mobile phone, tablet computer, desktop, laptop, notebook, ultra mobile personal computer (Ultra-mobile Personal Computer, UMPC), handheld computer, netbook, personal digital assistant (Personal Digital Assistant, PDA), wearable electronic device, etc. with photographing or camera shooting functions.
Referring to fig. 1 to 3, fig. 1 is a front view of an electronic device according to an embodiment of the present application, fig. 2 is a schematic view of a portion of a cross-sectional view of A-A of fig. 1, and fig. 3 is a schematic view of a portion of a cross-sectional view of B-B of fig. 1.
In this embodiment, an electronic device is described as an example of a mobile phone. As shown in fig. 1-3, the electronic device 1000 includes: the camera module 100, the housing 200, the display 300, and an image processor (not shown).
In some embodiments, the housing 200 includes a rear cover 210 and a rim 220 fixedly connected, and the rear cover 210 and the rim 220 may be in a unitary structure or a split structure. The display 300 and the rear cover 210 are respectively located at two sides of the frame 220, and together enclose an inner cavity of the electronic device 1000.
The rear cover 210 is provided with two light holes, a first light hole 211 and a second light hole 212, respectively. The camera module 100 collects light through the first light holes 211 and the second light holes 212.
It should be noted that the positions of the first light holes 211 and the second light holes 212 shown in fig. 1 are merely illustrative, and the positions of the first light holes 211 and the second light holes 212 are designed according to the positions of the camera module 100. The positions of the first light holes 211 and the second light holes 212 are not strictly limited in the embodiment of the present application.
In other embodiments, the light holes are one or more than three. The specific number of the light holes is selected according to practical situations, and the embodiment of the application is not limited to this.
The camera module 100 and the image processor are both located in the interior cavity of the electronic device 1000. The image processor is in communication with the camera module 100, and is configured to obtain image data from the camera module 100 and process the image data. The image processor transmits the processed image data to the display screen 300.
In this embodiment, the camera module 100 is a rear camera of the electronic device 1000, and the camera module 100 is located at the upper left corner of the back of the electronic device 1000. It should be noted that, the positions of the camera module 100 shown in fig. 1 are merely illustrative, and the position of the camera module 100 is not strictly limited in the embodiments of the present application.
In other embodiments, the camera module 100 is located in other locations of the electronic device 1000, such as the camera module 100 is located in the upper middle or upper right corner of the back of the electronic device 1000.
In other embodiments, the camera module 100 may also be a front camera of the electronic device 1000.
In other embodiments, the electronic device 1000 includes a terminal body and an auxiliary component capable of rotating, moving, or detaching with respect to the terminal body, and the camera module 100 is disposed on the auxiliary component. The image processor, the display 300 and the housing 200 belong to the components of the terminal body.
In other embodiments, the electronic device 1000 includes other devices or components and is not limited to the housing 200, the display 300, the camera module 100, and the image processor as listed above.
As shown in fig. 2 and 3, in some embodiments, the camera module 100 includes a lens module 110 and an image sensor 120. The image sensor 120 is located at the image side of the lens module 110.
The working principle of the camera module 100 is as follows: the light reflected by the photographed object passes through the lens module 110 to generate an optical image, which is projected onto the photosensitive surface of the image sensor 120, and the image sensor 120 is used to transmit an image signal to the image processor.
As for the type of the image sensor 120 (also referred to as a photosensitive element), the type of the image sensor 120 is not limited according to the actual situation, for example, a charge coupled device (charge coupled device, CCD), a complementary metal oxide conductor device (complementary metal oxide semiconductor, CMOS), and the like.
In this embodiment, the image sensor 120 is placed flat in the cavity of the electronic device 1000. It is understood that the thickness direction of the image sensor 120 is parallel to the thickness direction of the electronic device 1000. It is also understood that one of the length direction and the width direction of the image sensor 120 is parallel to the length direction of the electronic device 1000, the other is parallel to the width direction, and the length direction and the width direction of the image sensor 120 are perpendicular to the thickness direction of the electronic device.
The image sensor 120 may be quadrilateral, circular, or other shape. In the case where the image sensor 120 is circular, both the longitudinal direction and the width direction of the image sensor 120 are radial directions of the image sensor 120.
Because the inner cavity of the electronic device 1000 has a larger space in the length direction and the width direction, the image sensor 120 is horizontally placed in the inner cavity of the electronic device 1000, so that the length and the width of the image sensor 120 can be increased, namely, the volume of the image sensor 120 can be increased, thereby improving the pixels of the image sensor 120, improving the resolution of the image sensor 120, and further improving the imaging quality of the camera module 100; meanwhile, the thickness of the electronic equipment 1000 is also facilitated to be reduced, the volume of the electronic equipment 1000 is facilitated to be reduced, and the miniaturization requirement of the electronic equipment 1000 is met.
In the case of the display 300 having a planar structure, the image sensor 120 is parallel to the display 300, that is, the image sensor 120 is parallel to the placement surface of the display 300. It will be appreciated that the optical axis of the image sensor 120 is perpendicular to the display screen 300 and also perpendicular to the plane on which the display screen 300 is disposed.
In the case where the display 300 has a curved structure, the image sensor 120 is parallel to the placement surface on which the display 300 is placed. It will be appreciated that the optical axis of the image sensor 120 is perpendicular to the plane on which the display 300 is positioned.
In the case where both the first light-transmitting holes 211 and the second light-transmitting holes 212 are provided in the rear cover 210, the optical axis of the image sensor 120 may be parallel to both the axis of the first light-transmitting holes 211 and the axis of the second light-transmitting holes 212.
In other embodiments, the image sensor 120 may be placed upright in the interior cavity of the electronic device 1000. It is understood that the thickness direction of the image sensor 120 is perpendicular to the thickness direction of the electronic device 1000. It is also understood that one of the length direction and the width direction of the image sensor 120 is parallel to the thickness direction of the electronic device 1000 (perpendicular to the length direction and the width direction of the electronic device 1000), and the other is perpendicular to the thickness direction of the electronic device 1000 (parallel to the length direction or the width direction of the electronic device 1000).
In other embodiments, the image sensor 120 may be placed in the interior cavity of the electronic device 1000 in other ways, and is not limited to being placed flat and upright.
In other embodiments, the camera module 100 further includes other devices or components, and is not limited to the lens module 110 and the image sensor 120.
Fig. 4 is an isometric view of a structure of a camera module according to an embodiment of the present application, and fig. 5 is another isometric view of the camera module shown in fig. 4.
As shown in fig. 4 and 5, the lens module 110 includes: two lenses, namely a first lens 01 and a second lens 02; and a rotating prism 115.
In this embodiment, the number of the image sensors 120 is one, and the two lenses (the first lens 01 and the second lens 02) share one image sensor 120, so that the structure of the whole camera module 100 is simplified, and the assembly and disassembly of the camera module 100 are facilitated; the cost and bulk of the camera module 100 and thus the electronic device 1000 is also reduced.
In the present embodiment, as shown in fig. 1, 4 and 5, the first light transmission hole 211 on the rear cover 210 corresponds to the first lens 01, and the second light transmission hole 212 on the rear cover 210 corresponds to the second lens 02. It can be understood that the light entering from the first light transmission hole 211 reaches the image sensor 120 through the first lens 01, and the light entering from the second light transmission hole 212 reaches the image sensor 120 through the second lens 02. In this way, the first lens 01 and the second lens 02 share the rotating prism 115 and the image sensor 120, which is beneficial to simplifying the structure of the camera module 100 and reducing the cost of the camera module 100.
In other embodiments, the first lens 01 and the second lens 02 may share a light-transmitting aperture. In this case, the light transmitting hole may be one. Illustratively, the first light transmitting hole 211 is opposite to the first lens 01, the first light transmitting hole 211 is not opposite to the second lens 02, and the light entering from the first light transmitting hole 211 can change the transmission direction through the optical element and reach the second lens 02.
In this embodiment, the focal lengths of the first lens 01 and the second lens 02 are different. It is understood that the optical power of the first lens 01 and the second lens 02 are both positive optical power, and the optical power of the first lens 01 and the second lens 02 are different. This can achieve the effect of zoom shooting.
The focal length of the first lens 01 is larger than that of the second lens 02, or the focal length of the first lens 01 is smaller than that of the second lens 02.
In the case where the focal lengths of the first lens 01 and the second lens 02 are different, the first lens 01 and the second lens 02 are both telephoto lenses, so that a photographing effect of telephoto zoom can be achieved. Of course, the first lens 01 and the second lens 02 may be selected to be of other types, which is not limited in the embodiment of the present application. In other embodiments, the first lens 01 may be a non-telephoto lens, the second lens 02 may be a non-telephoto lens, or one of the first lens 01 and the second lens 02 may be a telephoto lens, and the other may be a non-telephoto lens.
It should be noted that, the long focal lens refers to a camera with a longer focal length, and the focal length of the long focal lens is greater than that of the main camera of the electronic device. And selecting a specific numerical range of the focal length of the tele lens according to actual conditions. In some embodiments, the equivalent focal length of the tele lens is 70mm-200mm. Of course, the equivalent focal length of the telephoto lens may be selected to be other values, which is not limited in the embodiment of the present application.
In order to make the camera module 100 better suited for use in a thinner electronic device 1000, the first lens 01 and the second lens 02 may be chosen to be periscopic lenses.
In the present embodiment, the first lens 01 includes a first prism 111 and a first lens group 112. The second lens 02 includes a second prism 113 and a second lens group 114. Wherein, the first lens group 112 and the second lens group 114 have positive focal power, and the first lens group 112 can image and the second lens group 114 can image.
The specific structures of the first lens 01 and the second lens 02 are described below with reference to fig. 6 to 9.
Fig. 6 is a front view of a structure of a camera module according to an embodiment of the present application, fig. 7 is a cross-sectional view taken along the direction C-C of fig. 6, fig. 8 is another cross-sectional view taken along the direction C-C of fig. 6, and fig. 9 is a cross-sectional view taken along the direction D-D of fig. 6. It should be noted that the light rays shown in fig. 7, 8 and 9 are only illustrative, and the number of light rays and the propagation direction of the light rays in the embodiment of the present application are not strictly limited.
As shown in fig. 6, the optical axis of the first lens 01 and the optical axis of the second lens 02 intersect, and the optical axis of the first lens 01 is perpendicular to the optical axis of the second lens 02. The optical axis of the first lens 01 extends in the X direction, and the optical axis of the second lens 02 extends in the Y direction.
As shown in fig. 6 and 7, in the first lens 01, the first prism 111 is located on the object side of the first lens group 112, that is, the first lens group 112 is located on the image side of the first prism 111. The distance between the first prism 111 and the first lens group 112 is selected according to the actual situation, and the embodiment of the present application is not limited thereto.
First lens group optical axis L of first lens group 112 11 And a first light-transmitting hole axis L of the first light-transmitting holes 211 01 Vertically, the first prism 111 is configured to deflect the light entering from the first light hole 211 by 90 ° to reach the object side surface of the first lens group 112. In this case, the first prism 111 may be a right angle prism or a pentagonal prism.
In other embodiments, the first lens group has an optical axis L 11 Can be aligned with the first light-transmitting hole axis L 01 In this case, the first prism 111 is configured to deflect the light entering from the first light hole 211 by a predetermined angle to reach the object side surface of the first lens assembly 112.
It can be understood that the first prism 111 can adjust the propagation direction of the light entering from the first light transmitting hole 211 from the first direction (Z direction) to the second direction (X direction), that is, the first prism 111 can deflect the light by a preset angle (may be referred to as a first preset angle). Wherein the first direction is parallel to the first light hole axis L 01 The second direction is parallel to the optical axis L of the first lens group 11 The method comprises the steps of carrying out a first treatment on the surface of the The first direction and the second direction have an included angle therebetween, that is, the first direction is perpendicular to the second direction (the preset angle is 90 °), or the first direction and the second direction are inclined relatively (the preset angle is an acute angle or an obtuse angle).
The optical power of the first prism 111 may be zero or may be greater than zero. As shown in fig. 8, in some embodiments, the first prism 111 is a prism with positive optical power, so that a certain convergence occurs after the light passes through the first prism 111, so that the convergence of the first lens group 112 can be reduced, and thus the optical power of the first lens group 112 can be reduced, and the thickness of the lenses in the first lens group 112 can be reduced, which is beneficial to reducing the volume of the first lens group 112; meanwhile, the first prism 111 is a prism with positive focal power, so that the converging effect on light rays is generated, and the volume of optical elements behind the first prism 111 is reduced; moreover, the first prism 111 is a prism having positive optical power, and can also increase the focal length of the entire first lens 01, and in the case where the focal length of the first lens 01 is greater than that of the second lens 02, the magnification ratio of the lens module 110 is increased.
The optical element behind the first prism 111 refers to an optical element through which light passes in the propagation direction of the light than the first prism 111. In the present embodiment, the optical elements behind the first prism 111 include the first lens group 112 and the rotating prism 115.
To ensure that the first prism 111 has positive optical power, the object side of the first prism 111 may be selected to have positive optical power, and/or the image side of the first prism 111 may have positive optical power. Of course, the first prism 111 may alternatively have positive optical power through other structures, which is not limited in the embodiment of the present application.
In the case where the object side surface of the first prism 111 has positive optical power, in order to facilitate manufacturing of the first prism 111, the object side surface of the first prism 111 is a curved surface having positive optical power. In the case where the image side surface of the first prism 111 has positive optical power, in order to facilitate manufacturing of the first prism 111, the image side surface of the first prism 111 may be selected to be a curved surface having positive optical power.
In this embodiment, on the one hand, the first prism 111 may be selected as an optical element, that is, the first prism 111 is in an integral structure. Alternatively, the first prism 111 may comprise at least two optical elements, i.e. at least two optical elements are assembled into the first prism 111.
The specific value of the positive power of the first prism 111 is set according to the actual situation, and the embodiment of the present application is not limited thereto.
As for the specific type of the first prism 111, it is selected according to practical circumstances, for example, the first prism 111 is a triangular prism having positive optical power, which is not limited by the embodiment of the present application.
The first prism 111 may also be replaced by other optical elements. The first prism 111, and other optical elements instead of the first prism 111, may be referred to as components of the deflecting unit. It will be appreciated that the first prism 111 performs the function of a deflecting unit, or that other optical elements instead of the first prism 111 perform the function of a deflecting unit. The deflecting unit may comprise one or more than two optical elements.
In the case where the first prism 111 has positive optical power, the deflecting unit has positive optical power.
In this embodiment, the first lens group 112 includes two first lenses 1121, and both the first lenses 1121 are convex lenses. It can be appreciated that the two first lenses 1121 are sequentially distributed along the optical axis of the first lens 1121, and a predetermined distance is provided between the two first lenses 1121, so that the first lens group 112 can be ensured to be capable of imaging. The specific value of the preset distance can be set according to the actually required focal length, which is not limited in the embodiment of the present application.
In other embodiments, the first lens group 112 may further include at least three lenses, and the embodiments of the present application are not limited thereto as long as imaging can be satisfied.
In other embodiments, the first lens group optical axis L of the first lens group 112 11 And a first light-transmitting hole axis L of the first light-transmitting holes 211 01 May be parallel, in which case the first lens 01 does not include the first prism 111.
In other embodiments, the first lens 01 may further include other optical elements or the first lens 01 may have other structures, which are not limited in this embodiment of the present application.
As shown in fig. 6 and 9, in the second lens 02, the second prism 113 is located on the object side of the second lens group 114, that is, the second lens group 114 is located on the image side of the second prism 113. The distance between the second prism 113 and the second lens group 114 is selected according to the actual situation, and the embodiment of the present application is not limited thereto.
Second lens group optical axis L of second lens group 114 12 And a second light-transmitting hole axis L of the second light-transmitting holes 212 02 The second prism 113 is used for deflecting the light entering from the second light hole 212 by 90 ° to reach the object side of the second lens group 114. In this case, the second prism 113 may be a right angle prism or a pentagonal prism.
In other embodiments, the second lens group has an optical axis L 12 Can be aligned with the second light hole axis L 02 In this case, the second prism 113 is used to make the light from the second light hole 212 enter The light rays deflected by a predetermined angle reach the object side surface of the second lens group 114.
It can be understood that the second prism 113 can adjust the propagation direction of the light entering from the second light transmitting hole 212 from the first direction (Z direction) to the third direction (Y direction), that is, the second prism 113 can deflect the light by a preset angle (which may be referred to as a first preset angle). Wherein the first direction is parallel to the second light hole axis L 02 The third direction is parallel to the optical axis L of the second lens group 12 The method comprises the steps of carrying out a first treatment on the surface of the The first direction and the third direction have an included angle therebetween, that is, the first direction is perpendicular to the third direction (the preset angle is 90 °), or the first direction and the third direction are inclined relatively (the preset angle is an acute angle or an obtuse angle).
The optical power of the second prism 113 may be zero or greater than zero. In some embodiments, the second prism 113 is a prism with positive focal power, so that a certain convergence occurs after the light passes through the second prism 113, so that the convergence effect of the second lens group 114 can be reduced, the focal power of the second lens group 114 can be reduced, and the thickness of the lens in the second lens group 114 can be reduced, which is beneficial to reducing the volume of the second lens group 114; meanwhile, the second prism 113 is a prism with positive focal power, so that the converging effect on light rays is generated, and the volume of optical elements behind the second prism 113 is reduced; further, the second prism 113 is a prism having positive optical power, and can also increase the focal length of the second lens 02, and in the case where the focal length of the first lens 01 is smaller than the focal length of the second lens 02, the magnification ratio of the entire lens module 110 is increased.
The optical element behind the second prism 113 refers to an optical element that passes light in the propagation direction of the light more than the second prism 113. In the present embodiment, the optical elements behind the second prism 113 include the second lens group 114 and the rotating prism 115.
To ensure that the second prism 113 has positive optical power, the object side of the second prism 113 may be selected to have positive optical power, and/or the image side of the second prism 113 may have positive optical power. Of course, the second prism 113 may alternatively have positive optical power through other structures, which is not limited in the embodiment of the present application.
In the case where the object side of the second prism 113 has positive optical power, in order to facilitate manufacturing of the second prism 113, the object side of the second prism 113 is a curved surface having positive optical power. In the case where the image side surface of the second prism 113 has positive optical power, in order to facilitate manufacturing of the second prism 113, the image side surface of the second prism 113 may be selected to be a curved surface having positive optical power.
In this embodiment, on the one hand, the second prism 113 may be selected as an optical element, that is, the second prism 113 is in an integral structure. Alternatively, the second prism 113 may comprise at least two optical elements, i.e. at least two optical elements are assembled into the second prism 113.
The specific value of the positive power of the second prism 113 is set according to the actual situation, and the embodiment of the present application is not limited thereto.
As for the specific type of the second prism 113, for example, the second prism 113 is a triangular prism having positive optical power, which is not limited by the embodiment of the present application, according to the actual situation.
The second prism 113 may also be replaced by other optical elements. The second prism 113, and other optical elements instead of the second prism 113, may be referred to as components of the deflecting unit. It will be appreciated that the second prism 113 performs the function of a deflecting unit, or that other optical elements instead of the second prism 113 perform the function of a deflecting unit. The deflecting unit may comprise one or more than two optical elements.
In the case where the second prism 113 has positive optical power, the deflecting unit has positive optical power.
In the present embodiment, the second lens group 114 includes two second lenses 1141, and both the second lenses 1141 are convex lenses. It can be appreciated that the two second lenses 1141 are sequentially distributed along the optical axis of the second lens 1141, and a predetermined distance is provided between the second lenses 1141, so as to ensure that the second lens group 114 can image. The specific value of the preset distance can be set according to the actually required focal length, which is not limited in the embodiment of the present application.
In other embodiments, the second lens 1141 may further include at least three lenses, as long as imaging can be satisfied, which is not limited by the embodiment of the present application with respect to the type of lenses.
In other embodiments, the second lens group optical axis L of the second lens group 114 12 And a second light-transmitting hole axis L of the second light-transmitting holes 212 02 May be parallel, in which case the second lens 02 does not include the second prism 113.
In other embodiments, the second lens 02 may further include other optical elements or the second lens 02 may have other structures, which are not limited in this embodiment of the present application.
In this embodiment, in the first lens 01 and the second lens 02, the preset angle by which the first prism 111 deflects the light and the preset angle by which the second prism 113 deflects the light may be equal or different.
As described above, the first lens 01 and the second lens 02 share the same image sensor 120, and in the case where light reaches the image sensor 120 through the first lens 01, the light does not reach the image sensor 120 through the second lens 02; accordingly, in the case where light reaches the image sensor 120 through the second lens 02, the light does not reach the image sensor 120 through the first lens 01.
In the present embodiment, the rotating prism 115 is located on the image side of the first lens 01 and the image side of the second lens 02. The rotating prism 115 is used to switch the outgoing light rays of the first lens 01 and the second lens 02 to propagate to the image sensor 120. This ensures that the first lens 01 and the second lens 02 share the same image sensor 120. The rotating prism 115 can transmit the outgoing light of the first lens 01 and the second lens 02 to the image sensor 120, and when the rotating prism 115 transmits the outgoing light of the first lens 01 or the second lens 02 to the image sensor 120 (when the outgoing light of one of the first lens 01 and the second lens 02 reaches the image sensor 120, the outgoing light of the other does not reach the image sensor 120).
The rotating prism 115 is rotatably provided on the image side of the first lens 01 and the image side of the second lens 02. It can be appreciated that the rotation prism 115 switches the outgoing light rays of the first lens 01 and the second lens 02 to propagate to the image sensor 120 by rotation. In some embodiments, the rotating prism 115 is rotatably disposed in an interior cavity of the electronic device 1000. Thus, the structure of the rotary prism 115 can be simplified, and the cost of the rotary prism 115 can be reduced; meanwhile, the rotary prism 115 is rotatably arranged, so that the moving mode of the rotary prism 115 is simplified, the structure of the lens module 110 is simplified, and the cost of the lens module 110 is reduced.
As shown in fig. 6, the object-side optical axis of the rotating prism 115 can be parallel to both the optical axis of the first lens 01 and the optical axis of the second lens 02, and the image-side surface of the rotating prism 115 always faces the image sensor 120. The rotation axis of the rotary prism 115 extends in a first direction (Z direction). It is also understood that the rotation axis of the rotation prism 115 and the optical axis of the image sensor 120 are disposed in line. In this way, the optical axis of the image side surface of the rotating prism 115 and the optical axis of the image sensor 120 are ensured to be collinear, thereby ensuring the imaging quality of the camera module 100.
As shown in fig. 4, the rotating prism 115 rotates to the first position, the rotating prism object side 1151 of the rotating prism 115 faces the image side of the first lens 01, and the rotating prism object side 1151 does not face the image side of the second lens 02, so that the outgoing light of the first lens 01 can reach the image sensor 120 through the rotating prism 115, and the outgoing light of the second lens 02 cannot reach the image sensor 120 through the rotating prism 115, that is, the outgoing light of the second lens 02 cannot reach the image sensor 120.
As shown in fig. 5, the rotating prism 115 rotates to the second position, the rotating prism object-side surface 1151 of the rotating prism 115 faces the image-side surface of the second lens 02, and the rotating prism object-side surface 1151 does not face the image-side surface of the first lens 01. In this way, the outgoing light of the second lens 02 can reach the image sensor 120 through the rotating prism 115, and the outgoing light of the first lens 01 cannot pass through the rotating prism 115, that is, the outgoing light of the first lens 01 cannot reach the image sensor 120.
Illustratively, the rotating prism 115 is a right angle prism, the side surface of the rotating prism 115 is quadrilateral, the end surface of the rotating prism 115 is triangular, the side surface of the rotating prism 115 can be used for injecting and injecting light, and the end surface of the rotating prism 115 cannot be used for injecting and injecting light. It will be appreciated that one side of the rotating prism 115 is the object side and the other is the image side. When the rotary prism 115 rotates to the first position, the end surface of the rotary prism 115 faces the image side surface of the second lens 02; when the rotary prism 115 rotates to the second position, the end surface of the rotary prism 115 faces the image side surface of the first lens 01.
The angle by which the rotary prism 115 is rotated from the first position to the second position may be designed according to the actual situation. In some embodiments, to facilitate the rotation of the rotating prism 115 from the first position to the second position, the angle between the optical axis of the first lens 01 and the optical axis of the second lens 02 may be selected to be equal to the angle at which the rotating prism 115 is required to rotate from the first position to the second position. Illustratively, the optical axis of the first lens 01 is perpendicular to the optical axis of the second lens 02, and the rotating prism 115 may be selectively rotated 90 ° from the first position to the second position; the optical axis of the first lens 01 and the optical axis of the second lens 02 are collinear, and the rotary prism 115 may be selectively rotated 180 ° from the first position to the second position.
Of course, the relationship between the angle between the optical axis of the first lens 01 and the optical axis of the second lens 02 and the angle at which the rotary prism 115 needs to be rotated from the first position to the second position may be selected as other, and is not limited to the above-described embodiment.
The direction of rotation of the rotating prism 115 from the first position to the second position may be counterclockwise or clockwise. As shown in fig. 6, the rotation direction of the rotation prism 115 is clockwise. Note that, fig. 7 and 8 are both C-C cross-sectional views of fig. 6 when the rotating prism 115 of fig. 6 is rotated to the first position, and the arrow-headed curves of fig. 7 and 8 are the rotation directions of the rotating prism 115 from the first position to the second position. Fig. 9 is a D-D cross-sectional view of fig. 6 in the case where the rotating prism 115 of fig. 6 is rotated to the second position, and the curve with an arrow in fig. 9 is a rotation direction of the rotating prism 115 from the second position to the first position.
The rotating prism 115 has a rotating function and also has a function of deflecting light. As shown in fig. 7-9, the optical axis of the image sensor 120 is parallel to the axis of the first light transmission hole 211 and the axis of the second light transmission hole 212, and since the first prism 111 and the second prism 113 deflect the light, it is necessary to rotate the prism 115 to deflect the light, so as to ensure that the optical axis of the image sensor 120 is parallel to the axis of the first light transmission hole 211 and the axis of the second light transmission hole 212.
The first and second prisms 111 and 113 deflect light at a first preset angle and the rotating prism 115 deflects light at a second preset angle. Specific values of the first preset angle and the second preset angle are selected according to practical situations, and the embodiment is not limited to this.
Illustratively, when the user of the electronic device 1000 switches from near to far, the camera module 100 is operated, as shown in fig. 7 and 8, the rotating prism 115 rotates to the first position, the first lens 01 is operated, light is incident from the object side of the first prism 111, the first prism 111 deflects the light path by 90 °, then the light is emitted from the image side of the first prism 111 and reaches the first lens group 112, the light emitted from the first lens group 112 is incident from the rotating prism object side 1151 of the rotating prism 115, and the rotating prism 115 deflects the light path by 90 ° and converges on the image sensor 120; when the user continues to switch from the distant view to the super distant view, the rotating prism 115 rotates to the second position, that is, the rotating prism 115 rotates 90 ° to reach the second position, as shown in fig. 9, the second lens 02 works, the light enters from the object side surface of the second prism 113, the second prism 113 deflects the light path by 90 °, then the light exits from the image side surface of the second prism 113 and reaches the second lens group 114, the outgoing light of the second lens group 114 enters from the object side surface 1151 of the rotating prism, and the rotating prism 115 deflects the light path by 90 ° and converges on the image sensor 120.
In this embodiment, the lens module 110 can realize optical zooming through the first lens 01, the second lens 02 and the rotating prism 115, and can realize continuous zooming under the condition that pixel loss is not obvious; the focal lengths of the first lens group 112 and the second lens group 114 are reasonably set, so that the focal length collocation of the first lens 01 and the second lens 02 can be realized, thereby realizing long-focus imaging and super-long-focus imaging, realizing long-focus zooming, and realizing larger zoom ratio; meanwhile, the first lens 01 and the second lens 02 share one image sensor 120, and the first lens 01 and the second lens 02 are switched to work through the rotating prism 115, so that the structural compactness of the whole camera module 100 is improved.
Compared with the existing digital zooming, the zooming structure of the lens module 110 improves the resolution of imaging of the lens module 110, thereby improving the imaging quality of the lens module 110; compared with the existing optical zooming, the focal length of the first lens 01 and the second lens 02 is reasonably set in a mode of combining the first lens 01 and the second lens 02, the zoom ratio of the lens module 110 is improved, and long-focal-length optical zooming can be realized; compared with the existing optical zooming, the first lens 01 and the second lens 02 are positioned in different light paths, so that the length of the light paths is shortened, the number of optical elements on one light path is reduced, the structure of the lens module 110 is simplified, and the yield of the lens module 110 is improved; in the lens module 110, only the rotating prism 115 is required to be rotated, so that the number of optical elements required to be moved is reduced, the structure of the lens module 110 is simplified, the yield of the lens module 110 is improved, and the cost of the lens module 110 is reduced.
In order to improve imaging brightness, the first prism 111, the second prism 113, and the rotating prism 115 may be selected to be total reflection prisms. Of course, the first prism 111, the second prism 113, and the rotating prism 115 may be selected to be of other types, which is not limited in the present application.
In other embodiments, the lens module 110 further includes a driving device for driving the rotating prism 115 to rotate. The specific structure and type of the driving device are selected according to the actual situation, and this embodiment is not limited thereto.
In other embodiments, a flat mirror or other optical element may be used in place of the rotating prism 115. It will be appreciated that the rotating prism 115 is one of the optical elements.
It should be noted that, instead of the rotating prism 115, a plane mirror or other optical element is used, and the plane mirror or other optical element needs to be rotated or otherwise moved, so as to ensure that the outgoing light of the first lens 01 and the second lens 02 propagates to the image sensor 120, and when the outgoing light of one of the first lens 01 and the second lens 02 reaches the image sensor 120, the outgoing light of the other one does not reach the image sensor 120. Reference may be made to the description of the rotating prism 115 for rotation of a flat mirror or other optical element, which is not described in detail herein.
In other embodiments, the lens module 110 includes at least three lenses, and the focal lengths of at least two lenses may be different, for example, the focal lengths of any two lenses may be different.
In the above embodiment, at least two lenses share the same image sensor 120, and the rotating prism 115 is used to switch the outgoing light of any two lenses to propagate to the image sensor 120. It is understood that the rotating prism 115 can make the outgoing light of at least two lenses propagate to the image sensor 120, and the rotating prism 115 makes the outgoing light of one lens propagate to the image sensor 120 when the outgoing light propagates. The rotation direction and rotation angle of the rotation prism 115 may be referred to the previous description, and will not be described again.
It should be noted that the rotating prism 115 is convenient to be applied to the lens module 110 with more than three lenses by rotating. That is, in the case where the number of lenses is three or more, the effect of the rotational arrangement of the rotational prism 115 is more easily emphasized.
In some cases, it may be selected that when the outgoing light of one lens of all lenses reaches the image sensor 120, the outgoing light of the other lens does not reach the image sensor 120.
In the case where the lens module 110 includes at least three lenses, each lens may be selected to be a tele lens, or at least two lenses may be selected to be tele lenses. For the description of the tele lens, reference may be made to the foregoing, and details are not repeated here.
In the case that the lens module 110 includes at least three lenses, the light holes may be selected to correspond to the lenses one by one. Of course, at least two lenses may also be selected to share a light hole, which is limited in the embodiment of the present application.
The rotating prism 115, and a plane mirror or other optical element in place of the rotating prism 115 may be referred to as a component of the light guide module. Accordingly, the driving means for driving the rotation prism 115 to rotate may also be referred to as a component of the light guide module.
It will be appreciated that the rotating prism 115 performs the function of a light guide module, or that a planar mirror or other optical element instead of the rotating prism 115 performs the function of a light guide module. The light guide module may comprise one or more optical elements.
As described above, the rotation prism 115 needs to rotate to enable the outgoing light of the first lens 01 and the second lens 02 to propagate to the image sensor 120, and when the outgoing light of one of the first lens 01 and the second lens 02 reaches the image sensor 120, the outgoing light of the other one does not reach the image sensor 120. However, the rotation of the rotation prism 115 may result in lower reliability and lower stability of the entire lens module 110. In order to improve the reliability and stability of the lens module 110, another lens module 110 and another camera module 100 are provided in the embodiments of the present application.
Fig. 10 is a front view of another structure of a camera module 100 according to an embodiment of the present application.
As shown in fig. 10, the camera module 100 includes a lens module 110 and an image sensor 120.
In this embodiment, the function, specific type and placement manner of the image sensor 120 can be referred to the foregoing, and will not be described herein.
In this embodiment, the lens module 110 includes: a first lens 01, a second lens 02, a fixed prism 116, a first shutter 117, and a second shutter 118.
For the specific structures of the first lens 01 and the second lens 02, reference may be made to the foregoing, and a detailed description thereof will be omitted herein.
The fixed prism 116 is fixedly disposed on the image side of the first lens 01, and the fixed prism 116 is fixedly disposed on the image side of the second lens 02. In some embodiments, the fixed prism 116 is fixedly disposed in an interior cavity of the electronic device 1000.
Because the fixed prism 116 is fixedly arranged, the whole lens module 110 does not need to move optical elements, and the reliability and stability of the whole lens module 110 are improved; meanwhile, the structure of the lens module 110 is simplified, the cost of the lens module 110 is reduced, and the yield of the lens module 110 is improved.
The fixed prism 116 is used to transmit outgoing light of the first lens 01 and the second lens 02 to the image sensor 120. It will be appreciated that the fixed prism 116 can simultaneously achieve the transmission of the outgoing light rays of the first lens 01 and the second lens 02 to the image sensor 120.
In some embodiments, the fixed prism 116 may be a cube-shaped dichroic prism, i.e., the fixed prism 116 is cube-shaped. The fixed prism 116 includes a first slope and a second slope. The first inclined plane can enable the outgoing light of the first lens 01 to be transmitted to the image sensor 120, and the second inclined plane can enable the outgoing light of the second lens 02 to be transmitted to the image sensor 120. In this way, the structure of the fixed prism 116 is simplified, and the cost of the fixed prism 116 is reduced.
Fig. 11 is a light path diagram of an incident light beam propagating to a first inclined plane of a fixed prism in a camera module according to an embodiment of the present application, and fig. 12 is a light path diagram of an incident light beam propagating to a second inclined plane of the fixed prism in the camera module according to an embodiment of the present application.
As shown in fig. 11 and 12, in the fixed prism 116, two adjacent and perpendicular faces each have a diagonal line of a first diagonal line 1161 and a diagonal line of the other face of the fixed prism is a second diagonal line 1162. Wherein, a plane in which the first diagonal 1161 and one diagonal parallel to the first diagonal 1161 are located is referred to as a first slope, and a plane in which the second diagonal 1162 and one diagonal parallel to the second diagonal 1162 are located is referred to as a second slope. It should be noted that the first inclined plane and the second inclined plane have a coincident line, and the coincident line of the first inclined plane and the second inclined plane passes through the center point of the fixed prism 116.
Because the first inclined plane and the second inclined plane are provided with the overlapping line, in order to ensure the imaging quality of the lens module 110, the first inclined plane is provided with the semi-transparent semi-reflective film, and the second inclined plane is provided with the semi-transparent semi-reflective film. The transflective film is a film that reflects half of the incident light and refracts half of the incident light. Thus, the light propagates to the first inclined plane, half of the light is reflected, and half of the light is transmitted; correspondingly, the light propagates to the second inclined plane, half of the light is reflected, and half of the light is transmitted.
The first inclined surface may be formed by a diagonal line of the other surface, and the second inclined surface may be formed by a diagonal line of the other surface, and is not limited to the first diagonal line 1161 and the second diagonal line 1162 shown in fig. 11 and 12.
As shown in fig. 11, the incident light enters from the left side of the fixed prism 116, the left side is used to transmit the light to the first inclined plane, the semi-transparent and semi-reflective film on the first inclined plane is used to reflect half of the light to the lower side of the fixed prism 116, and the other half of the light is transmitted to the right side of the fixed prism 116. The light emitted from the lower side of the fixed prism 116 is referred to as a first emitted light, and the light emitted from the right side of the fixed prism 116 is referred to as a second emitted light.
As shown in fig. 12, the incident light enters from the rear side of the fixed prism 116, the rear side is used to transmit light to the second inclined surface, and the semi-transparent and semi-reflective film on the second inclined surface is used to reflect half of the light to the lower side of the fixed prism 116 and the other half to the front side of the fixed prism 116. The light emitted from the lower side of the fixed prism 116 is referred to as a first emitted light, and the light emitted from the front side of the fixed prism 116 is referred to as a second emitted light.
The light emitted from the lower side of the fixed prism 116, i.e., the first outgoing light, reaches the image sensor 120 to be imaged.
In other embodiments, the fixed prism 116 may also be replaced by other optical elements.
Since the fixed prism 116 is fixedly disposed, and the fixed prism 116 can simultaneously realize that the outgoing light rays of the first lens 01 and the second lens 02 are transmitted to the image sensor 120, the outgoing light rays of the first lens 01 and the second lens 02 can mutually influence. In order to avoid the mutual influence of the emitted light rays of the first lens 01 and the second lens 02, the first shutter 117 is used to open and close the first lens 01, and the second shutter 118 is used to open and close the second lens 02.
When the outgoing light of the first lens 01 is required to propagate to the image sensor 120, the first shutter 117 opens the first lens 01; when the outgoing light of the first lens 01 is not required to propagate to the image sensor 120, the first shutter 117 closes the first lens 01. Similarly, when the outgoing light requiring the second lens 02 propagates to the image sensor 120, the second shutter 118 opens the second lens 02; when the outgoing light of the second lens 02 is not required to propagate to the image sensor 120, the second shutter 118 closes the second lens 02.
The positions of the first shutter 117 and the second shutter 118 are selected according to actual conditions. In some embodiments, a first shutter 117 is located between the first prism 111 and the first lens group 112, and a second shutter 118 is located between the second prism 113 and the second lens group 114.
In other embodiments, the first shutter 117 is located on the object side of the first prism 111, or the first shutter 117 is located between the first lens group 112 and the fixed prism 116, and the second shutter 118 is located on the object side of the second prism 113, or the second shutter 118 is located between the second lens group 114 and the fixed prism 116.
The specific types and structures of the first shutter 117 and the second shutter 118 are selected according to actual conditions, and the embodiment of the present application is not limited thereto.
In other embodiments, the lens module 110 includes at least three lenses, and the focal lengths of at least two lenses may be different, for example, the focal lengths of any two lenses may be different.
In the above embodiment, at least two lenses share the same image sensor 120, and the fixed prism 116 is used to transmit the outgoing light of the at least two lenses to the image sensor 120. It is understood that the fixed prism 116 can simultaneously transmit the outgoing light rays of at least two lenses to the image sensor 120.
In the case that the lens module 110 includes at least three lenses, the lens module 110 includes at least three shutters, the shutters are disposed on the lenses, and the shutters control the opening and closing of the lenses in which the shutters are disposed. In this way, the fixed prism 116 and the shutter cooperate to enable the outgoing light of at least two lenses to be transmitted to the image sensor 120, and the outgoing light of one lens to be transmitted to the image sensor 120 when the outgoing light is transmitted.
As described above, the optical axis of the image sensor 120 is parallel to the axis of the first light transmission hole 211 and the axis of the second light transmission hole 212, and the first prism 111 and the second prism 113 deflect the light. In this case, the fixed prism 116 is required to deflect the light, so as to ensure that the optical axis of the image sensor 120 is parallel to the axis of the first light hole 211 and the axis of the second light hole 212. The angle at which the prism 116 deflects the light is fixed, and is not limited in this embodiment according to the actual situation.
The above-described fixed prism 116, and other optical elements instead of the fixed prism 116 may be referred to as components of the fixed unit. It will be appreciated that the fixed prism 116 performs the function of a fixed unit or that other optical elements in place of the fixed prism 116 perform the function of a fixed unit. The fixing unit may include one or more than two optical elements.
The first shutter 117 and the second shutter 118 may be referred to as shutters, and the above-described fixing unit and the shutters may be referred to as components of the light guide module. It can be appreciated that the fixing unit and the shutter cooperate to realize the function of the light guide module.

Claims (11)

1. A lens module, comprising:
at least two lenses, wherein the lenses are long-focus lenses, and the focal lengths of the at least two lenses are different; of the at least two lenses, optical axes of the two lenses intersect and are vertical;
the light guide module can enable outgoing light rays of the at least two lenses to be transmitted to the same image sensor, and enables outgoing light rays of one lens of the at least two lenses to be transmitted to the image sensor when the light rays are transmitted by the light guide module, and outgoing light rays of other lenses of the at least two lenses are not transmitted to the image sensor;
the light guide module comprises a first prism, wherein the first prism is rotatably arranged on the image side of the lens, and the first prism is positioned at the intersection position of the optical axes of the two lenses; the first prism can enable the emergent rays of the two lenses to be transmitted to the same image sensor, and when the first prism transmits rays, the emergent rays of one of the two lenses are transmitted to the image sensor, and the emergent rays of the other of the two lenses are not transmitted to the image sensor;
Alternatively, the light guide module includes: a second prism, and at least two shutters; the second prism is fixedly arranged on the image side of the lens, and the second prism is positioned at the intersection position of the optical axes of the two lenses; the second prism is used for enabling emergent rays of the two lenses to be transmitted to the same image sensor; the shutter is arranged on the lens and controls the opening and closing of the lens where the shutter is positioned.
2. The lens module as claimed in claim 1, wherein the rotation axis of the first prism and the optical axis of the image sensor are disposed collinearly.
3. The lens module of claim 1, wherein the number of lenses is two, a first lens and a second lens; the second prism is a cubic beam splitter prism, and the cubic beam splitter prism comprises a first inclined plane and a second inclined plane;
the first inclined plane is used for enabling outgoing light rays of the first lens to be transmitted to the image sensor, and the second inclined plane is used for enabling outgoing light rays of the second lens to be transmitted to the image sensor.
4. The lens module as claimed in claim 3, wherein the first inclined surface and the second inclined surface are each provided with a semi-transparent and semi-reflective film.
5. The lens module of claim 1, wherein the shutter is located between two optical elements of the lens, the shutter is located on an object side of the lens, or the shutter is located on an image side of the lens.
6. The lens module of any of claims 1-5, wherein the lens comprises a lens group having positive optical power and capable of imaging;
in at least one lens, an included angle is formed between an optical axis of the lens group and an axis of a light hole corresponding to the lens group;
at least one lens further comprises a deflection unit, wherein the deflection unit is positioned at the object side of the lens group, and the deflection unit is used for deflecting the light entering from the light holes to reach the object side surface of the lens group by a first preset angle.
7. The lens module of claim 6, wherein the deflection unit of at least one of the lenses has positive optical power; and/or, the deflection unit is a prism.
8. The lens module as recited in claim 6, wherein,
under the condition that an included angle is formed between the optical axis of the lens group and the axis of the light transmission hole corresponding to the lens group, the axis of the light transmission hole is parallel to the optical axis of the image sensor, and the light guide module is further used for enabling emergent light of the lens group to deflect by a second preset angle to reach the image sensor.
9. A camera module comprising an image sensor and a lens module according to any one of claims 1-8, the image sensor being located on an image side of the lens module.
10. An electronic device comprising an image processor and the camera module of claim 9; the image processor is in communication connection with the camera module, and is used for acquiring image data from the camera module and processing the image data.
11. The electronic device of claim 10, wherein the image processor and the camera module are both disposed inside the electronic device;
wherein the thickness direction of the image sensor is parallel to the thickness direction of the electronic device; and/or the shell of the electronic equipment is provided with light holes corresponding to the lenses one by one.
CN202310972141.9A 2023-08-03 2023-08-03 Lens module, camera module and electronic equipment Active CN116708983B (en)

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