Optical assembly, camera module and electronic equipment

Abstract

The invention discloses an optical assembly, a camera module and electronic equipment, and belongs to the technical field of optics. The optical assembly includes: a first front lens group including at least one non-rotationally symmetric lens; the reflecting part moves between a first position and a second position; the rear lens group is arranged corresponding to the reflecting piece; under the condition that the reflecting piece is located at the first position, the reflecting piece reflects incident light rays collected by the first front lens group to the rear lens group; and under the condition that the reflecting piece is located at the second position, the reflecting piece reflects the incident light collected from the second position to the rear lens group.

Description

Technical Field

[0001] The present application belongs to the field of optical technology, and specifically relates to an optical component, a camera module and an electronic device. Background Art

[0002] With the popularization of electronic devices such as mobile phones, the camera function of electronic devices has become increasingly important.

[0003] In the related art, electronic devices are equipped with telephoto lenses, wide-angle lenses, standard lenses, etc., so as to use multiple lenses to achieve more powerful photo-taking functions. Among them, multiple lenses need to be matched with their own optical systems, which makes the camera module larger and increases the overall size of the electronic device. Summary of the invention

[0004] The purpose of the embodiments of the present application is to provide an optical component, a camera module and an electronic device, which can enable at least two lenses to share part of the optical path, simplify the structure of the camera module, reduce the volume of the camera module, and help reduce the overall size of the electronic device.

[0005] In a first aspect, an embodiment of the present application provides an optical component, the optical component comprising:

[0006] a first front lens group, the first front lens group comprising at least one non-rotationally symmetric lens;

[0007] a reflective member, the reflective member moving between a first position and a second position;

[0008] A rear lens group, wherein the rear lens group is arranged corresponding to the reflector;

[0009] Wherein, when the reflector is located at the first position, the reflector reflects the incident light collected by the first front lens group to the rear lens group;

[0010] When the reflector is located at the second position, the reflector reflects the incident light collected from the second position to the rear lens group.

[0011] In a second aspect, an embodiment of the present application provides a camera module, which includes the optical components described in the first aspect.

[0012] In a third aspect, an embodiment of the present application provides an electronic device, which includes the optical component as described in the first aspect; or, includes the camera module as described in the second aspect.

[0013] In an embodiment of the present application, an optical component includes: a first front lens group, a reflector and a rear lens group, wherein the first front lens group includes at least one non-rotationally symmetrical lens; the reflector moves between a first position and a second position; the rear lens group is arranged corresponding to the reflector; when the reflector is located at the first position, the reflector reflects the incident light collected by the first front lens group to the rear lens group; when the reflector is located at the second position, the reflector reflects the incident light collected from the second position to the rear lens group. Wherein, the first front lens group corresponds to a lens including at least one non-rotationally symmetrical lens, and the second position corresponds to a lens without a lens or with other lenses. By adjusting the position of the reflector, it is possible to switch which lens is used to collect the incident light transmitted to the rear lens group. In this way, the optical path of the optical component can be switched, so that at least two lenses share part of the optical path, which can simplify the structure of the camera module, reduce the volume of the camera module, and help reduce the overall size of the electronic device. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is one of the structural schematic diagrams of an optical component provided in an embodiment of the present application;

[0015] Figure 2 yes Figure 1 A schematic structural diagram of the first front lens group in the optical assembly shown;

[0016] Figure 3a yes Figure 1 An astigmatism field curve diagram of the first optical system in the optical assembly shown;

[0017] Figure 3b yes Figure 1 A distortion diagram of a first optical system in the optical assembly shown;

[0018] Figure 3c yes Figure 1 A modulation transfer function (MTF) curve of the first optical system in the optical assembly shown;

[0019] Figure 3d yes Figure 1 An astigmatism field curve diagram of the second optical system in the optical assembly shown;

[0020] Figure 3e yes Figure 1 A distortion diagram of a second optical system in the optical assembly shown;

[0021] Figure 3f yes Figure 1 An MTF graph of the second optical system in the optical assembly shown;

[0022] Figure 4 This is the second structural schematic diagram of an optical component provided in an embodiment of the present application;

[0023] Figure 5 yes Figure 4 A schematic structural diagram of the first front lens group in the optical assembly shown;

[0024] Figure 6a yes Figure 4 An astigmatism field curve diagram of the first optical system in the optical assembly shown;

[0025] Figure 6b yes Figure 4 A distortion diagram of a first optical system in the optical assembly shown;

[0026] Figure 6c yes Figure 4 An MTF graph of the first optical system in the optical assembly shown;

[0027] Figure 6d yes Figure 4 An astigmatism field curve diagram of the second optical system in the optical assembly shown;

[0028] Figure 6e yes Figure 4 A distortion diagram of a second optical system in the optical assembly shown;

[0029] Figure 6f yes Figure 4 An MTF graph of the second optical system in the optical assembly shown;

[0030] Figure 7 This is a third structural schematic diagram of an optical component provided in an embodiment of the present application;

[0031] Figure 8 yes Figure 7 A schematic structural diagram of the first front lens group in the optical assembly shown;

[0032] Figure 9a yes Figure 7 An astigmatism field curve diagram of the first optical system in the optical assembly shown;

[0033] Figure 9b yes Figure 7 A distortion diagram of a first optical system in the optical assembly shown;

[0034] Fig.9c yes Figure 7 An MTF graph of the first optical system in the optical assembly shown;

[0035] Figure 9d yes Figure 7 An astigmatism field curve diagram of the second optical system in the optical assembly shown;

[0036] Fig.9e yes Figure 7 A distortion diagram of a second optical system in the optical assembly shown;

[0037] Figure 9f yes Figure 7 An MTF graph of the second optical system in the optical assembly shown;

[0038] Fig.10 This is a fourth structural schematic diagram of an optical component provided in an embodiment of the present application;

[0039] Fig.11 yes Fig.10 a top view of the optical assembly shown;

[0040] Fig.12 yes Fig.10 A cross-sectional view of a first reflective member in the optical assembly shown;

[0041] Fig.13 It is a structural schematic diagram of a camera module provided in an embodiment of the present application. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments in the present application belong to the scope of protection of this application.

[0043] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0044] The optical components, camera modules and electronic devices provided in the embodiments of the present application are described in detail below through specific embodiments and their application scenarios in combination with the accompanying drawings.

[0045] See also Figure 1 , the optical component provided in the embodiment of the present application includes:

[0046] A first front lens group 10, the first front lens group 10 includes at least one non-rotationally symmetric lens;

[0047] A reflective member 20, wherein the reflective member 20 moves between a first position A and a second position B;

[0048] A rear lens group 30, which is disposed corresponding to the reflector 20;

[0049] Wherein, when the reflector 20 is located at the first position A, the reflector 20 reflects the incident light collected by the first front lens group 10 to the rear lens group 30;

[0050] When the reflector 20 is located at the second position B, the reflector 20 reflects the incident light collected from the second position B to the rear lens group 30 .

[0051] In some embodiments, the first front lens group 10 corresponds to a lens including at least one non-rotationally symmetric lens. For ease of description, in the embodiment of the present application, the first front lens group 10 is used as an example to illustrate the first lens. The first optical system used by the first lens is the first front lens group 10, the reflector 20 and the rear lens group 30.

[0052] In some embodiments, Figure 1 or Figure 4 As shown, the second position B may be provided with a second front lens group 40. At this time, the reflector 20 located at the second position B is used to reflect the incident light collected by the second front lens group 40 to the rear lens group 30. Alternatively, as Figure 7 As shown, no lens may be provided at the second position B. In this case, the reflector 20 located at the second position B directly reflects the incident light from the outside to the rear lens group 30.

[0053] For the convenience of explanation, in the embodiment of the present application, the second position B corresponds to the second lens as an example for explanation. The second optical system used by the second lens is a reflector 20 and a rear lens group 30 .

[0054] In some embodiments, the non-rotationally symmetric lens may be a spherical cylindrical lens, an aspherical cylindrical lens, or a free-form lens.

[0055] Among them, taking the even-order aspheric surface as an example, the aspheric surface satisfies the following aspheric surface formula:

[0056]

[0057] Where Z is the sag of the surface parallel to the Z axis, which coincides with the optical axis; C is the curvature of the surface, which is the inverse of the radius of curvature of the surface; K is the cone constant, and A, B, C, D, E, F, G, and H are aspheric coefficients.

[0058] It is worth mentioning that, since the first front lens group 10 includes at least one non-rotationally symmetric lens, the non-rotationally symmetric lens has different refraction angles for light at different positions, and can change the aspect ratio of light penetrating the non-rotationally symmetric lens, thereby achieving deformation of the collected light. For example, the aspect ratio of the collected image can be deformed from 4:3 to 16:9. At this time, the first lens can also be called an anamorphic lens or a movie anamorphic lens.

[0059] It is worth mentioning that in the relevant technology, the aspect ratio of the photosensitive chip on electronic devices such as mobile phones is usually 4:3, and the shooting field of view is relatively small. When it is necessary to output a picture with an aspect ratio of 16:9, the image needs to be cropped, thereby reducing the area utilization of the photosensitive chip.

[0060] In the present embodiment, since the first front lens group 10 includes a non-rotationally symmetric lens, the aspect ratio of the imaging picture can be changed by using the non-rotationally symmetric lens. For example, by increasing the horizontal field of view by 1.33 times through the first front lens group 10, the aspect ratio of the picture captured by the photosensitive chip is increased from 4:3 to 16:9. In this way, the width of the photographic field of view can be increased without cropping the picture captured by the photosensitive chip.

[0061] In some implementations, the second lens may be a telephoto lens, a wide-angle lens, or any other lens.

[0062] For the sake of convenience, in the embodiments of the present application, an example is given in which the first lens is a deformable lens and the second lens is a telephoto lens.

[0063] In some embodiments, by adjusting the position of the reflector 20, it is possible to switch whether the lens in the optical assembly that is in a working state is a deformable lens or a telephoto lens, that is, when the reflector 20 is in a first position A, the deformable lens is in a working state, and the telephoto lens is in a non-working state; when the reflector 20 is in a second position B, the deformable lens is in a non-working state, and the telephoto lens is in a working state.

[0064] In some embodiments, the anamorphic lens and the telephoto lens may share a portion of the optical path, such as sharing the rear lens group 30 , or sharing the rear lens group 30 and the reflector 20 .

[0065] As an optional implementation, if the anamorphic lens and the telephoto lens share the rear lens group 30 and the reflector 20, then the number of the reflector 20 is one.

[0066] For example: Figure 1 , Figure 4 or Figure 7As shown, the first front lens group 10 is arranged corresponding to the first position A, and the distance between the first position A and the second position B along the optical axis direction of the rear lens group 30 is D, D is greater than or equal to the first threshold and less than or equal to the second threshold, and the first threshold is greater than 0.

[0067] In some embodiments, the first position A and the second position B are spaced apart along the optical axis of the rear lens group 30, and may be as follows: Figure 1 , Figure 4 or Figure 7 As shown in , the first position A and the second position B are both located on the optical axis of the rear lens group 30 , and the second position B is located on a side of the first position A close to the rear lens group 30 .

[0068] At this time, the first front lens group 10 is set corresponding to the first position A, which can be understood as the first front lens group 10 facing the first position A. In this way, the external light penetrating the first front lens group 10 can be reflected by the reflector 20 located at the first position A to the rear lens group 30.

[0069] In other embodiments, the first position A and the second position B are spaced apart along the optical axis of the rear lens group 30, and the first position A and the second position B are both located on the optical axis of the rear lens group 30, and the second position B is located on the side of the first position A facing away from the rear lens group 30. Figure 1 , Figure 4 or Figure 7 In the illustrated embodiment, the first position A and the second position B are exchanged.

[0070] For the sake of convenience of explanation, in the embodiments of the present application, the second position B is usually taken as an example that is located on the side of the first position A close to the rear lens group 30, which is not specifically limited here.

[0071] In some embodiments, the distance D between the first position A and the second position B is greater than or equal to a first threshold value, so as to ensure that when the reflector 20 is located at the first position A, the light incident from the first front lens group 10 can be reflected to the rear lens group 30; and when the reflector 20 is located at the second position B, the light incident from the second front lens group 40 can be reflected to the rear lens group 30. This prevents the reflector 20 from failing to smoothly reflect the light incident from the first front lens group 10 and the light incident from the second front lens group 40 to the rear lens group 30 due to the distance D between the first position A and the second position B being too small.

[0072] In some embodiments, the first threshold may be determined according to the entrance pupil diameter of the second optical system. For example, the first threshold is 0.5 times EPD2, where EPD2 identifies the entrance pupil diameter of the second lens, such as 3.8 mm.

[0073] In some embodiments, the distance D between the first position A and the second position B is less than or equal to the second threshold value, which can avoid the distance between the first position A and the second position B being too large, resulting in unnecessary increase in the size of the optical component.

[0074] In some embodiments, the second threshold may be determined according to the entrance pupil diameter of the second optical system. For example, the second threshold is 1.5 times EPD2, where EPD2 indicates the entrance pupil diameter of the second lens, such as 11.4 mm.

[0075] In some embodiments, the reflector 20 may be a prism or a plane mirror, and the thickness T of the reflector 20 along the direction of the optical axis thereof satisfies: T <D。

[0076] As another optional implementation, if the anamorphic lens and the telephoto lens share the rear lens group 30 but do not share the reflector 20, the number of the reflectors 20 is at least two.

[0077] For example: Fig.10 and Fig.11 As shown, the reflective member 20 includes a first reflective member 21 and a second reflective member 22;

[0078] The first reflector 21 is disposed corresponding to the first front lens group 10;

[0079] The second reflector 22 moves between a first position A and a second position B, wherein the first position A corresponds to the second front lens group 40 and the second position B is outside the optical axis of the rear lens group 30;

[0080] When the second reflector 22 is located at the first position A, the second reflector 22 reflects the incident light collected by the second front lens group 40 to the rear lens group 30, and blocks the reflected light of the first reflector 21 from propagating to the rear lens group 30;

[0081] When the second reflector 22 is located at the second position B, the first reflector 21 reflects the incident light collected by the first front lens group 10 to the rear lens group 30 .

[0082] like Fig.10 and Fig.11As shown, for the two lenses in the optical component, a corresponding reflector needs to be set for each of them, wherein the first reflector 21 corresponds to the first front lens group 10, so that the incident light collected by the first front lens group 10 can be transmitted toward the rear lens group 30 after being reflected by the first reflector 21; the second reflector 22 can move between the first position A and the second position B, so that when the second reflector 22 is located at the second position B corresponding to the second front lens group 40, the incident light collected by the second front lens group 40 can be reflected to the rear lens group 30, and the light reflected by the first reflector 21 is blocked from being transmitted to the rear lens group 30, at which time, the second lens is in a working state; when the second reflector 22 is located at the first position A, since the first position A is located outside the optical axis of the rear lens group 30, the first position A cannot reflect the incident light collected by the second front lens group 40 to the rear lens group 30, and will not block the light reflected by the first reflector 21 from being transmitted to the rear lens group 30, at which time, the first lens is in a working state.

[0083] It is worth mentioning that in the embodiment of the present application, in addition to the first lens and the second lens, other lenses may be provided. In this case, in addition to the second front lens group 40, a third front lens group, a fourth front lens group, etc. may also be included, and the reflector 20 may include at least 3 or more working states. For example, the optical component includes the first front lens group 10, the second front lens group 40 and the third front lens group. In this case, the reflector may move between a first position, a second position and a third position, wherein the first position corresponds to the first front lens group 10, the second position corresponds to the second front lens group 40, and the third position corresponds to the third front lens group. In this case, the reflector 20 includes 3 working states corresponding to the first position, the second position and the third position, respectively. When the reflector 20 is located at the first position, the lens corresponding to the first front lens group 10 works; when the reflector 20 is located at the second position, the lens corresponding to the second front lens group 40 works; when the reflector 20 is located at the third position, the lens corresponding to the third front lens group works.

[0084] In this embodiment, a respective reflector 20 is provided for each lens, and the lens in working state is switched by changing the position of at least part of the reflector 20. In this way, different reflectors 20 can be used in different optical paths, making the optical system more flexible.

[0085] For example, the first reflective element 21 is a cylindrical prism with optical power.

[0086] Take the case where the adjacent two sides of the imaging screen extend along the Y axis (vertical) direction and the X axis (horizontal) direction respectively. Fig.11 is the cross-sectional view of the optical component along the Y-axis direction, Fig.12 is a cross-sectional view of the first reflector 21 along the X-axis direction.

[0087] In some embodiments, a cylindrical prism may mean that along the optical axis direction, one or all of the light incident surface, reflection surface, and emission surface of the cylindrical prism are cylindrical surfaces.

[0088] In this embodiment, the first reflector 21 is configured as a cylindrical prism with optical focal length, and the optical focal length of the first reflector 21 can be used to improve the optical performance of the optical component. On the premise of meeting the overall optical focal length requirements of the optical component, the height of the first front lens group 10 and the rear lens group 30 along the optical axis can be reduced.

[0089] It should be noted that, in addition to Fig.11 As shown, in addition to the method in which the first reflector 21 is fixed and the second reflector 22 is movable between the first position A and the second position B, the first reflector 21 and the second reflector 22 can also be set as movable reflectors, so that when the first lens is working, the first reflector 21 is moved to correspond to the first front lens group 10, and the second reflector 22 is moved outside the optical axis of the optical component; when the second lens is working, the second reflector 22 is moved to correspond to the second front lens group 40, and the first reflector 21 is moved outside the optical axis of the optical component.

[0090] Alternatively, you can Fig.10 and Fig.11 On the basis of, the positions of the first front lens group 10 and the second front lens group 40 are exchanged, and the first reflector 21 corresponding to the first lens is set to move between a first position and a second position, so that when the first reflector 21 is in the first position, the second reflector 22 reflects the incident light collected by the second front lens group 40 to the rear lens group 30; when the first reflector 21 is in the second position, the first reflector 21 reflects the incident light collected by the first front lens group 10 to the rear lens group 30, and blocks the light reflected by the second reflector 22 from being transmitted to the rear lens group 30.

[0091] In some embodiments, the rear lens group 30 can realize a zoom function, and its specific working principle is that the rear lens group 30 can include at least two lenses, and the focal length of the light assembly can be changed by adjusting the position of at least some of the lenses in the rear lens group 30.

[0092] Of course, in addition to the focusing function, the rear lens group 30 can also realize the function of correcting aberrations. The principle of correcting aberrations is the same as the functional principle of using the rear lens group 30 to correct aberrations in the related art, and will not be repeated here.

[0093] As an optional implementation, Figure 1 As shown, the rear lens group 30 includes:

[0094] Automatic Focus (AF) lens group 31, the AF lens group 31 moves along the optical axis to achieve a focusing function.

[0095] For example: Figure 1 As shown, the rear lens group 30 includes 7 lenses movable along the optical axis.

[0096] In this embodiment, the rear lens group 30 may include at least two lenses, and the at least two lenses move along their optical axis as a whole to achieve a focusing function. At this time, the lenses in the entire rear lens group 30 constitute an AF lens group 31, which has a simple structure.

[0097] In some other embodiments, the rear lens assembly 30 further includes:

[0098] The fixed lens group 32 is fixed relative to the first front lens group 10 , and is located at a side of the AF lens group 31 close to the reflector 20 .

[0099] For example: Figure 4 As shown, the rear lens group 30 includes 7 lenses, among which the 4 lenses close to the reflector 20 constitute the fixed lens group 32, and the 3 lenses away from the reflector 20 constitute the AF lens group 31. At this time, the AF lens group 31 can move along the optical axis relative to the fixed lens group 32 to achieve the focusing function.

[0100] In this embodiment, the lenses in the rear lens group 30 are divided into two groups, one group is relatively fixed with the first front lens group 10 to serve as a fixed lens group 32 to achieve a fixed focus function; the other group can be moved along the optical axis of the rear lens group 30 relative to the first front lens group 10 to serve as an AF lens group 31 to achieve a zoom function, which can improve the focusing flexibility of the rear lens group 30.

[0101] As an optional implementation, Figure 2 , Figure 5 or Figure 8 As shown, the first front lens group 10 includes a first lens 11, a second lens 12 and a third lens 13 which are sequentially stacked along the propagation path of the incident light;

[0102] The first lens 11 and the second lens 12 have negative refractive power;

[0103] The third lens 13 has positive refractive power.

[0104] In some embodiments, the first lens 11 and the second lens 12 have negative optical power, and the first lens 11 and the second lens 12 may be concave lenses.

[0105] In some embodiments, the third lens 13 has positive optical power, and the third lens 13 may be a convex lens.

[0106] In some embodiments, the second lens 12 and the third lens 13 are combined to form a cemented lens. For example, the curvature of the exit surface of the second lens 12 is consistent with the curvature of the incident surface of the third lens 13, and glue, resin, etc. are filled in the gap between the exit surface of the second lens 12 and the incident surface of the third lens 13, so that the second lens 12 and the third lens 13 form a cemented lens.

[0107] In this way, the structure of the first front lens group 10 can be simplified and the size of the first front lens group 10 can be reduced.

[0108] In the present embodiment, the first front lens group 10 having a non-rotationally symmetric structure can be formed by stacking the first lens 11 and the second lens 12 having negative refractive power and the third lens 13 having positive refractive power.

[0109] In some embodiments, the lenses in the second front lens group 40 may be rotationally symmetric lenses, for example, the second front lens group 40 includes at least one rotationally symmetric spherical or aspherical lens.

[0110] Of course, in some embodiments, the second front lens group 40 may not be provided, that is, the second front lens group 40 includes 0 lenses. In this case, the reflector 20 directly reflects the external light at the second position B to the rear lens group 30. In this case, it can be understood that the second front lens group 40 includes 0 lenses, which is not specifically limited here.

[0111] In order to facilitate understanding of the optical components provided in the embodiments of the present application, the structures, parameters, simulation performance, etc. of various optical components provided in the embodiments of the present application are illustrated by taking the following embodiments as examples.

[0112] Embodiment 1

[0113] like Figure 1 and Figure 2 As shown, Figure 1 It is a cross-sectional view of the optical component along the Y-axis direction, where the Y-axis is the height direction of the picture; Figure 2 The sectional view of the first front lens group 10 along the X-axis direction, where the X-axis is the width direction of the image. The optical assembly includes: a first front lens group 10, a second front lens group 40, a reflector 20 and a rear lens group 30.

[0114] like Figure 2 As shown, the first front lens group 10 includes three lenses. In the X-axis direction of the optical system, the first lens 11 and the second lens 12 in the first front lens group 10 have negative optical power, the third lens 13 has positive optical power, and the second lens L2 and the third lens L3 form a cemented lens.

[0115] The second front lens group 40 includes one aspherical lens.

[0116] like Figure 1 As shown, the rear lens group 30 includes 7 aspherical lenses, and the 7 aspherical lenses act as a whole, and the rear lens group 30 moves as a whole group to achieve the focusing function.

[0117] In the first embodiment, the focal length parameters of the first optical system and the second optical system are shown in Table 1 below:

[0118] Table 1

[0119]

[0120]

[0121] In the first embodiment, the surface type, radius of curvature, thickness, refractive index and Abbe number of each lens in the optical assembly are shown in Table 2 below:

[0122] Table 2

[0123]

[0124]

[0125] As shown in Table 2 above, the first lens 11, the second lens 12 and the third lens 13 are respectively three lenses arranged in sequence along the propagation direction of the incident light in the first front lens group 10; the fourth lens is a lens in the second front lens group 40; the fifth lens, the sixth lens, the seventh lens, the eighth lens, the ninth lens, the tenth lens and the eleventh lens are respectively seven lenses arranged in sequence along the propagation direction of the incident light in the rear lens group 30; and as Fig.13 As shown, an infrared cutoff filter 50 and a photosensitive chip 60 are also provided in the emitting direction of the rear lens group 30. At this time, S1 to S27 are respectively the incident surface, the reflection surface or the emitting surface of each lens or reflector in the light assembly which are sequentially arranged along the propagation direction of the incident light.

[0126] In the first embodiment, the aspheric high-order coefficients of each lens in the optical assembly are shown in Table 3 below:

[0127] Table 3

[0128]

[0129]

[0130] In this embodiment, the first front lens group 10 and the second front lens group 40 are arranged side by side along the optical axis direction of the rear lens group 30, and the reflector 20 can move to a first position A corresponding to the first front lens group 10, or move to a second position B corresponding to the second front lens group 40.

[0131] In this way, when the reflector 20 moves to the first position A corresponding to the first front lens group 10, the incident light collected by the first front lens group 10 is reflected to the rear lens group 30. At this time, the first lens is in a working state, and the incident light is propagated through the first optical system, which includes: the first front lens group 10, the reflector 20 and the rear lens group 30.

[0132] When the reflector 20 moves to the second position B corresponding to the second front lens group 40, the incident light collected by the second front lens group 40 is reflected to the rear lens group 30. At this time, the second lens is in a working state, and the incident light is transmitted through the second optical system, which includes: the second front lens group 40, the reflector 20 and the rear lens group 30.

[0133] Optionally, the distance between the first position A and the rear lens group 30 is 10 mm, and the distance between the second position B and the rear lens group 30 is 0.5 mm.

[0134] Of course, in addition to the above-mentioned spacing values, the spacing between the first position A and the rear lens group 30, and the spacing between the second position B and the rear lens group 30 can be adjusted according to the position, size, etc. of each device in the optical component. This is only used as an example and is not a specific limitation.

[0135] based on Figure 3a to Figure 3f It can be seen that in the embodiment of the present application, when the first optical system is working, the wide field of view of the telephoto lens can be achieved, and when the second optical system is working, the telephoto lens can be achieved, and both the first optical system and the second optical system have good imaging quality.

[0136] Embodiment 2

[0137] like Figure 4 and Figure 5 As shown, Figure 4 It is a cross-sectional view of the optical component along the Y-axis direction, where the Y-axis is the height direction of the picture; Figure 5 The sectional view of the first front lens group 10 along the X-axis direction, where the X-axis is the width direction of the image. The optical assembly includes: a first front lens group 10, a second front lens group 40, a reflector 20 and a rear lens group 30.

[0138] like Figure 5As shown, the first front lens group 10 includes three lenses. In the X-axis direction of the optical system, the first lens 11 and the second lens 12 in the first front lens group 10 have negative optical power, the third lens 13 has positive optical power, and the second lens L2 and the third lens L3 form a cemented lens.

[0139] The second front lens group 40 includes one aspherical lens.

[0140] like Figure 4 As shown, the rear lens group 30 includes 7 aspheric lenses, 4 of the 7 aspheric lenses close to the reflector 20 constitute a fixed lens group 32, and 3 of the 7 aspheric lenses far from the reflector 20 constitute an AF lens group 31. In this way, the AF lens group 31 moves along the optical axis relative to the rear lens group 30 to realize the AF focusing function.

[0141] Optionally, when the object distance is infinite, when the first optical system is working, the interval between the fixed lens group 32 and the AF lens group 31 in the rear lens group 30 is 1.49 mm, and when the second optical system is working, the interval between the fixed lens group 32 and the AF lens group 31 in the rear lens group 30 is 2.19 mm.

[0142] In the second embodiment, the focal length parameters of the first optical system and the second optical system are shown in Table 4 below:

[0143] Table 4

[0144] X-direction focal length Y-direction focal length aperture Image height The first optical system 11.02 14.4 2 4.06 Second optical system 15.8 15.8 2 4.06

[0145] In the second embodiment, the surface type, radius of curvature, thickness, refractive index and Abbe number of each lens in the optical assembly are shown in Table 5 below:

[0146] Table 5

[0147]

[0148]

[0149] As shown in Table 5 above, the first lens 11, the second lens 12 and the third lens 13 are three lenses arranged in sequence along the propagation direction of the incident light in the first front lens group 10; the fourth lens is a lens in the second front lens group 40; the fifth lens, the sixth lens, the seventh lens, the eighth lens, the ninth lens, the tenth lens and the eleventh lens are seven lenses arranged in sequence along the propagation direction of the incident light in the rear lens group 30, wherein the fifth lens, the sixth lens, the seventh lens and the eighth lens constitute a fixed lens group 32, and the ninth lens, the tenth lens and the eleventh lens constitute an AF lens group 31; and as Fig.13As shown, an infrared cutoff filter 50 and a photosensitive chip 60 are also provided in the emitting direction of the rear lens group 30. At this time, S1 to S27 are respectively the incident surface, the reflection surface or the emitting surface of each lens or reflector in the light assembly which are sequentially arranged along the propagation direction of the incident light.

[0150] In the second embodiment, the aspheric high-order coefficients of each lens in the optical component are shown in Table 6 below:

[0151] Table 6

[0152]

[0153]

[0154]

[0155] The difference between the second embodiment and the first embodiment is that in the first embodiment, the lenses in the entire rear lens group 30 move as a whole, while in the second embodiment, the lenses in the rear lens group 30 are divided into a fixed lens group 32 and an AF lens group 31, wherein only the AF lens group 31 can move along its optical axis to achieve a focusing function. In the second embodiment of the present application, the structure, position and working principle of the first front lens group 10, the second front lens group 40 and the reflector 20 are similar to those of the first embodiment, and are not described in detail here.

[0156] based on Figures 6a to 6f It can be seen that in the embodiment of the present application, when the first optical system is working, the wide field of view of the telephoto lens can be achieved, and when the second optical system is working, the telephoto lens can be achieved, and both the first optical system and the second optical system have good imaging quality.

[0157] Embodiment 3

[0158] like Figure 7 and Figure 8 As shown, Figure 7 It is a cross-sectional view of the optical component along the Y-axis direction, where the Y-axis is the height direction of the picture; Figure 8 The sectional view of the first front lens group 10 along the X-axis direction, where the X-axis is the width direction of the image. The optical assembly includes: the first front lens group 10, the reflector 20 and the rear lens group 30.

[0159] like Figure 8 As shown, the first front lens group 10 includes three lenses. In the X-axis direction of the optical system, the first lens 11 and the second lens 12 in the first front lens group 10 have negative optical power, the third lens 13 has positive optical power, and the second lens L2 and the third lens L3 form a cemented lens.

[0160] like Figure 7As shown, the rear lens group 30 includes 7 aspherical lenses, and the 7 aspherical lenses move as a whole along the optical axis to achieve the AF focusing function.

[0161] The differences between the third embodiment and the first embodiment include: in the first embodiment, a second front lens group 40 is arranged at the second position B, so that when the reflector 20 is located at the second position B, the incident light collected by the second front lens group 40 is reflected to the rear lens group 30; while in the third embodiment, the second front lens group is not arranged at the second position B, that is, the second optical system does not include the front lens group, and when the reflector 20 is located at the second position B, the reflector 20 directly reflects the external light to the rear lens group 30. In the third embodiment of the present application, the structure, position and working principle of the first front lens group 10 and the reflector 20 are similar to those of the first embodiment, and will not be repeated here.

[0162] In the third embodiment, the focal length parameters of the first optical system and the second optical system are shown in Table 7 below:

[0163] Table 7

[0164] X-direction focal length Y-direction focal length aperture Image height The first optical system 12.05 15.8 2.07 4.06 Second optical system 15.8 15.8 2.07 4.06

[0165] In this third embodiment, the surface type, radius of curvature, thickness, refractive index and Abbe number of each lens in the optical assembly are shown in Table 8 below:

[0166] Table 8

[0167]

[0168]

[0169] In the third embodiment, the aspheric high-order coefficients of each lens in the optical assembly are shown in Table 9 below:

[0170] Table 9

[0171]

[0172]

[0173]

[0174] based on Figures 9a to 9f It can be seen that in the embodiment of the present application, when the first optical system is working, the wide field of view of the telephoto lens can be achieved, and when the second optical system is working, the telephoto lens can be achieved, and both the first optical system and the second optical system have good imaging quality.

[0175] Embodiment 4

[0176] like Fig.10 , Fig.11 and Fig.12 As shown, Fig.10 It is a cross-sectional view of the optical component along the Y-axis direction, where the Y-axis is the height direction of the picture; Fig.11 is a cross-sectional view of the first reflector 21 along the X-axis direction, where the X-axis is the width direction of the image; Fig.12 It is a top view of the optical assembly along the Y-axis direction. The optical assembly includes: a first front lens group 10, a second front lens group 40, a reflector 20 and a rear lens group 30.

[0177] like Fig.10 and Fig.11 As shown, the reflector 20 includes a first reflector 21 and a second reflector 22. For example, the reflector 20 includes two prisms, wherein the prism in the first optical system is fixed, and the prism in the second optical system moves in a direction perpendicular to the optical axis. When the first optical system is working, the prism in the second optical system leaves the working position, and when the second optical system is working, the prism in the second optical system returns to the working position.

[0178] The difference between the fourth embodiment and the first embodiment includes: in the first embodiment, the first optical system and the second optical system share a reflector 20; while in the fourth embodiment, the first optical system uses a first reflector 21, and the second optical system uses a second reflector 22, and the first reflector 21 is a fixed reflector, and the second reflector 22 is a movable reflector, and the first optical system and the second optical system are switched by changing the position of the second reflector 22. In the fourth embodiment of the present application, the structures and working principles of the first front lens group 10, the second front lens group 40 and the rear lens group 30 are similar to those of the first embodiment, and are not described in detail here.

[0179] It can be seen from the above embodiments 1 to 4 that the optical assembly provided in the embodiments of the present application can at least achieve the following beneficial effects:

[0180] 1. The optical design scheme including the anamorphic lens can realize the wide field of view photography of the telephoto lens. Compared with the conventional image plane cropping scheme, it increases the image plane utilization rate of the photosensitive chip and enhances the sense of perspective.

[0181] 2. The cylindrical lens design scheme adopted in the anamorphic lens design scheme can realize wide field of view photography. Compared with the scheme of image cropping in related technologies, it has a unique horizontal brushed glare effect and an elliptical blurred light spot, providing users with a unique photography experience.

[0182] 3. By moving the reflective component, the switching of the two optical systems is realized, and the reflective component, the rear lens group, the infrared cut-off filter and the photosensitive chip can be shared, or the rear lens group, the infrared cut-off filter and the photosensitive chip can be shared. Compared with the related art in which the two optical systems use their own independent design schemes, the volume of the optical components is greatly reduced.

[0183] The present application also provides a camera module, such as Fig.13 As shown, the camera module includes a photosensitive chip 60 and any optical component provided in the aforementioned embodiments of the present application;

[0184] The photosensitive chip 60 is disposed in the light emitting direction of the rear lens group 30 .

[0185] The photosensitive chip 60 is arranged in the light emitting direction of the rear lens group 30 , and the photosensitive chip 60 can be arranged on the optical axis of the rear lens group 30 and located on the side of the rear lens group 30 facing the back reflector 20 .

[0186] In the embodiment of the present application, the first optical system and the second optical system can share a photosensitive chip, which can simplify the structural complexity of the camera module and reduce the size of the camera module.

[0187] In some embodiments, when the first optical system is working, based on the first front lens group 10 in the first optical system, the aspect ratio of the field of view of the camera module can be magnified, so that the camera module can achieve wide-field shooting, and combined with the zoom function of the rear lens group 30, telephoto wide-field shooting can be achieved; when the second optical system is working, based on the zoom function of the rear lens group 30, telephoto shooting can be achieved.

[0188] Of course, the second front lens group 40 in the second optical system may also adopt other types of lenses, such as a wide-angle lens, a fixed-focus lens, etc., which are not specifically limited here.

[0189] In some embodiments, Fig.13 As shown, the camera module provided in the embodiment of the present application also includes:

[0190] The infrared cut-off filter 50 is disposed between the rear lens group 30 and the photosensitive chip 60 .

[0191] In some embodiments, two opposite surfaces of the infrared cut-off filter 50 are respectively provided with an anti-reflection (AR) anti-reflection film and an infrared ray (IP) cut-off film.

[0192] For example, the base material of the infrared cut-off filter 50 is a flat glass, and two opposite surfaces of the flat glass are coated with an AR anti-reflection film and an IR cut-off film respectively.

[0193] In this way, the efficiency of visible light penetrating the infrared cut filter 50 can be improved, and the efficiency of the infrared cut filter 50 in filtering infrared light can also be improved.

[0194] In this embodiment, the infrared cutoff filter 50 can be used to filter out the infrared light in the outgoing light processed by the rear lens group 30, and only visible light can penetrate the infrared cutoff filter 50 to reach the imaging surface of the photosensitive chip 60, which can reduce the imaging interference of infrared light on the photosensitive chip 60 and improve the imaging quality of the photosensitive chip 60.

[0195] An embodiment of the present application also provides an electronic device, which includes any one of the optical components provided in the aforementioned embodiments of the present application and a power supply.

[0196] In some embodiments, the power source of the electronic device is a battery.

[0197] In other embodiments, the power supply of the electronic device includes structures such as wires and plugs for electrically connecting to an external power supply.

[0198] In some embodiments, the electronic device may be a terminal or other device other than a terminal. For example, the electronic device may be a mobile phone, a tablet computer, a laptop computer, a PDA, a vehicle-mounted electronic device, a mobile Internet device (MID), an augmented reality (AR) / virtual reality (VR) device, a robot, a wearable device, an ultra-mobile personal computer (UMPC), a netbook or a personal digital assistant (PDA), etc. It may also be a server, a network attached storage (NAS), a personal computer (PC), a television (TV), a teller machine or a self-service machine, etc., which is not specifically limited in the embodiments of the present application.

[0199] The electronic device provided in the embodiment of the present application has any one of the optical components provided in the aforementioned embodiments of the present application, which can enable the optical systems of the two lenses to share some optical elements, thereby reducing the space occupied by the camera module in the electronic device, and thus reducing the overall volume of the electronic device; in addition, the first lens can also be used to achieve wide-field shooting, which can improve the utilization rate of the photosensitive chip. It has the same or similar beneficial effects as the aforementioned optical components or camera module embodiments of the present application, and will not be repeated here to avoid repetition.

[0200] It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or device including the element.

[0201] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. An optical component, characterized in that: include: a first front lens group, the first front lens group comprising at least one non-rotationally symmetric lens; a reflective member, the reflective member moving between a first position and a second position; A rear lens group, wherein the rear lens group is arranged corresponding to the reflector; Wherein, when the reflector is located at the first position, the reflector reflects the incident light collected by the first front lens group to the rear lens group; When the reflector is located at the second position, the reflector reflects the incident light collected from the second position to the rear lens group.

2. The optical component according to claim 1, characterized in that Also includes: a second front lens group, the second front lens group corresponding to the second position; When the reflector is located at the second position, the reflector reflects the incident light collected by the second front lens group to the rear lens group.

3. The optical component according to claim 2, characterized in that The first front lens group is arranged corresponding to the first position, and the distance between the first position and the second position along the optical axis direction of the rear lens group is D, D is greater than or equal to a first threshold and less than or equal to a second threshold, and the first threshold is greater than 0.

4. The optical component according to claim 2, characterized in that The reflective member includes a first reflective member and a second reflective member; The first reflector is disposed corresponding to the first front lens group; The second reflector moves between a first position and a second position, the first position corresponds to the second front lens group, and the second position is outside the optical axis of the rear lens group; Wherein, when the second reflector is located at the first position, the second reflector reflects the incident light collected by the second front lens group to the rear lens group, and blocks the reflected light of the first reflector from propagating to the rear lens group; When the second reflector is located at the second position, the first reflector reflects the incident light collected by the first front lens group to the rear lens group.

5. The optical component according to claim 4, characterized in that The first reflective element is a cylindrical prism with optical power.

6. The optical component according to any one of claims 1 to 5, characterized in that The first front lens group includes a first lens, a second lens and a third lens which are sequentially stacked along the propagation path of the incident light; The first lens and the second lens have negative optical power; The third lens has positive refractive power.

7. The optical component according to claim 6, characterized in that The second lens and the third lens are combined to form a cemented lens.

8. The optical component according to any one of claims 1 to 5, characterized in that: The rear lens group comprises: An auto-focus AF lens group moves along the optical axis to achieve a focusing function.

9. The optical component according to claim 8, characterized in that The rear lens group also includes: A fixed lens group, wherein the fixed lens group is relatively fixed to the first front lens group, and the fixed lens group is located on a side of the AF lens group close to the reflector.

10. A camera module, characterized in that: Comprising an optical component and a photosensitive chip as claimed in any one of claims 1 to 9; The photosensitive chip is arranged in the light emitting direction of the rear lens group.

11. The camera module according to claim 10, characterized in that: Also includes: An infrared cut-off filter, the infrared cut-off filter is arranged between the rear lens group and the photosensitive chip; The two opposite surfaces of the infrared cut-off filter are respectively provided with an anti-reflection AR anti-reflection film and an infrared light IP cut-off film.

12. An electronic device, characterized in that: include: An optical assembly and a power supply as claimed in any one of claims 1 to 9.

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