CN114079687A - A mobile terminal with built-in anamorphic lens - Google Patents
A mobile terminal with built-in anamorphic lens Download PDFInfo
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- CN114079687A CN114079687A CN202011070143.1A CN202011070143A CN114079687A CN 114079687 A CN114079687 A CN 114079687A CN 202011070143 A CN202011070143 A CN 202011070143A CN 114079687 A CN114079687 A CN 114079687A
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- 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
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
- G02B13/0015—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design
- G02B13/002—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface
- G02B13/0045—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface having five or more lenses
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
- G02B13/0055—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras employing a special optical element
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
- G02B13/0055—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras employing a special optical element
- G02B13/0075—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras employing a special optical element having an element with variable optical properties
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/08—Anamorphotic objectives
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/08—Anamorphotic objectives
- G02B13/10—Anamorphotic objectives involving prisms
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- 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
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/72—Mobile telephones; Cordless telephones, i.e. devices for establishing wireless links to base stations without route selection
- H04M1/724—User interfaces specially adapted for cordless or mobile telephones
- H04M1/72403—User interfaces specially adapted for cordless or mobile telephones with means for local support of applications that increase the functionality
- H04M1/7243—User interfaces specially adapted for cordless or mobile telephones with means for local support of applications that increase the functionality with interactive means for internal management of messages
- H04M1/72439—User interfaces specially adapted for cordless or mobile telephones with means for local support of applications that increase the functionality with interactive means for internal management of messages for image or video messaging
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/72—Mobile telephones; Cordless telephones, i.e. devices for establishing wireless links to base stations without route selection
- H04M1/725—Cordless telephones
-
- 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
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- 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
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- 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
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Abstract
本发明公开了一种具有内置变形镜头的移动终端，所述移动终端上设有宽荧幕变形镜头；所述宽荧幕变形镜头包括柱面透镜组和球面透镜组，所述柱面透镜组至少包括一组负光焦度柱面透镜及一组正光焦度柱面透镜。在移动终端设置宽荧幕变形镜头，宽荧幕变形镜头中柱面透镜的光学特性，可以将水平进入的入射光线进行“压缩”，而垂直方向进入的入射光线保持不变，因而宽荧幕变形镜头可以将宽荧幕的画面压缩到标准的画面区域内，宽荧幕变形镜头拍摄到的被压缩画面经过图像矫正模块变形矫正后，可以得到宽荧幕图片和视频，满足使用者对移动终端宽荧幕拍摄的需求。
The invention discloses a mobile terminal with a built-in anamorphic lens, the mobile terminal is provided with a wide-screen anamorphic lens; the wide-screen anamorphic lens comprises a cylindrical lens group and a spherical lens group, and the cylindrical lens group At least one group of cylindrical lenses with negative refractive power and one group of cylindrical lenses with positive refractive power are included. A wide-screen anamorphic lens is installed on the mobile terminal. The optical characteristics of the cylindrical lens in the wide-screen anamorphic lens can "compress" the incident light entering the horizontal direction, while the incident light entering the vertical direction remains unchanged. The anamorphic lens can compress the wide-screen image into the standard image area. After the compressed image captured by the wide-screen anamorphic lens is deformed and corrected by the image correction module, wide-screen pictures and videos can be obtained, which can satisfy the user's need for mobile phones. The needs of terminal wide-screen shooting.
Description
Technical Field
The invention relates to the technical field of mobile phone lenses, in particular to a mobile terminal with a built-in deformable lens.
Background
The number of built-in cameras of the mobile phone is increasing, and the wide-angle camera, the ultra-wide-angle camera, the long-focus camera and the micro-distance camera are already built in the mainstream flagship mobile phone on the market. With the development of future technologies and requirements, it is necessary to simply and rapidly shoot wide-screen pictures and videos by using a mobile phone, and software and hardware of the mobile phone cannot be realized at present.
Disclosure of Invention
Therefore, the technical problem to be solved by the present invention is to overcome the defect that the lens built in the mobile phone in the prior art cannot realize the wide-screen shooting function, thereby providing a mobile terminal with a built-in anamorphic lens.
In order to solve the technical problems, the technical scheme of the invention is as follows:
a mobile terminal with a built-in anamorphic lens is provided with a wide-screen anamorphic lens; the wide-screen anamorphic lens comprises a cylindrical lens group and a spherical lens group, wherein the cylindrical lens group at least comprises a group of negative focal power cylindrical lenses and a group of positive focal power cylindrical lenses.
Further, the cylindrical lens group and the spherical lens group are arranged in order from an object side to an image side along an optical axis.
Further, the cylindrical lens group includes a first lens, a second lens and a third lens which are sequentially arranged from an object side to an image side along an optical axis, the first lens and the second lens are negative-power cylindrical lenses, and the third lens is a positive-power cylindrical lens.
Further, the spherical lens group includes at least four aspherical lenses.
Further, the spherical lens group includes a fourth lens, a fifth lens, a sixth lens, and a seventh lens arranged in order from an object side to an image side along an optical axis; the fourth lens, the fifth lens, the sixth lens and the seventh lens are all even aspheric lenses.
Furthermore, a refraction element is disposed between the cylindrical lens group and the spherical lens group, and the refraction element is located on a light path of incident light incident through the cylindrical lens group and refracts the incident light to the spherical lens group.
Further, the mechanical center line of the cylindrical lens group and the mechanical center line of the spherical lens group are perpendicular to each other.
Further, the refraction element is a triangular prism, a plane mirror or a pentaprism.
Further, the deformation coefficient of the wide-screen anamorphic lens ranges from 1.33 to 2.0.
Further, the thickness of the wide screen anamorphic lens is not more than 12 mm.
Further, the wide-screen anamorphic lens is embedded and installed on the mobile terminal.
Further, the mobile terminal is a mobile phone or a tablet computer.
The technical scheme of the invention has the following advantages:
1. the mobile terminal with the built-in deformable lens provided by the invention has the advantages that the small wide-screen deformable lens is arranged on the mobile terminal, the optical characteristics of the cylindrical lens group which at least consists of the group of negative-focal-power cylindrical lenses and the group of positive-focal-power cylindrical lenses in the wide-screen deformable lens are utilized, the incident light horizontally entering the cylindrical lens group can be compressed, and the incident light vertically entering the cylindrical lens group is kept unchanged, so that the wide-screen deformable lens can compress the picture of the wide screen into a standard picture area, and the compressed picture shot by the wide-screen deformable lens can be subjected to deformation correction by the image correction module to obtain a wide-screen picture and a wide video, thereby meeting the requirement of a user on the wide-screen shooting of the mobile terminal.
2. According to the mobile terminal with the built-in anamorphic lens, the wide-screen anamorphic lens utilizes the optical characteristics of the cylindrical lens group consisting of the three cylindrical lenses to compress incident light entering horizontally, the incident light entering in the vertical direction is kept unchanged, and the incident light is comprehensively corrected through the rear spherical lens group, so that the field angle of the horizontal shooting of the lens is increased, the aspect ratio of the actually shot image is increased, and the functions of wide-screen photos and videos are realized.
3. According to the mobile terminal with the built-in anamorphic lens, the refraction element is arranged between the cylindrical lens group and the spherical lens group of the wide screen anamorphic lens, the refraction element can change the direction of a light path, and further the cylindrical lens group and the spherical lens group can be arranged in a non-linear mode, such as a periscopic 'L' shape, so that the wide screen anamorphic lens can be installed on the mobile terminal.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic back view of a mobile phone with a wide-screen anamorphic lens embedded therein according to an embodiment of the present invention;
fig. 2 is a cross-sectional view of a side surface of a mobile phone with a wide screen anamorphic lens embedded therein according to an embodiment of the invention;
FIG. 3 is a schematic view illustrating a lens assembly according to an embodiment of the present invention;
FIG. 4 is a diagram of an optical path of a lens assembly according to an embodiment of the present invention;
FIG. 5 is a graph of optical distortion for a lens assembly according to one embodiment of the present invention, with the abscissa representing percent distortion and the ordinate representing field angle;
FIG. 6 is a graph of MTF (modulation Transfer function) Transfer function of a lens assembly according to an embodiment of the present invention, wherein the abscissa represents spatial frequency and the ordinate represents MTF value.
Description of reference numerals: 100. a mobile terminal; 200. a wide screen anamorphic lens; 210. a cylindrical lens group; 220. a spherical lens group;
p1, first lens; p2, second lens; p3, third lens; PM, a refractive element; p4, fourth lens; p5, fifth lens; p6, sixth lens; p7, seventh lens;
1. an object side surface of the first lens; 2. an image side surface of the first lens; 3. an object side surface of the second lens; 4. an image side surface of the second lens; 5. an image side surface of the third lens; 6. a light incident surface of the refractive element; 7. a light emergent surface of the refraction element; 8. an object-side surface of the fourth lens; 9. an image side surface of the fourth lens; 10. a diaphragm; 11. an object-side surface of the fifth lens; 12. an image-side surface of the fifth lens element; 13. an object side surface of the sixth lens; 14. an image-side surface of the sixth lens element; 15. an object side surface of the seventh lens; 16. the image side surface of the seventh lens.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
Example one
As shown in fig. 1 and 2, in a mobile terminal with a built-in anamorphic lens, a small wide-screen anamorphic lens 200 is disposed on the mobile terminal 100, and the wide-screen anamorphic lens 200 has a function of capturing a squeeze-out image. The wide-screen anamorphic lens 200 can be mounted on the mobile terminal in an embedded structure, for example, a groove is provided on the mobile terminal 100, and the lens module including the wide-screen anamorphic lens is integrally embedded and fixed on the groove. In other embodiments, the lens module including the wide-screen anamorphic lens may further be rotatably connected to the mobile terminal through a rotating mechanism, the rotating mechanism may specifically rotate the pin, the lens module including the wide-screen anamorphic lens is rotatably connected to the rotating pin, at least one state of the lens module during the rotation process is built in the mobile terminal, the built-in lens module may be understood as that all or a part of the lens module extends into the mobile terminal, or that the lens module is understood as that after the lens module is mounted on the mobile terminal, the lens module cannot be detached from the mobile terminal in other manners except for a destructive detachment manner, so as to be different from the lens module mounted in an external hanging type structure.
In the wide-screen anamorphic lens, the definition of the wide screen means that the aspect ratio of the shot picture is larger than the aspect ratio of the current high-definition television screen by 16: 9, for example, the aspect ratio of the shot in the anamorphic lens is 2.7: 1, namely the wide screen anamorphic lens. The deformation coefficient of the wide-screen anamorphic lens ranges from 1.33 to 2.0, for example, the deformation coefficient can be 1.33, 1.5, 1.8, 2.0, etc.
With reference to fig. 3 and fig. 4, in the present embodiment, the wide-screen anamorphic lens includes a cylindrical lens group 210, a spherical lens group 220, and a refractive element PM, which are sequentially disposed from an object side to an image side, where the cylindrical lens group 210 at least includes a set of negative-power cylindrical lenses and a set of positive-power cylindrical lenses. By utilizing the optical characteristics of the cylindrical lens group consisting of at least one group of negative-focal-power cylindrical lenses and one group of positive-focal-power cylindrical lenses, incident light entering the cylindrical lens group 210 horizontally can be compressed, while the incident light entering the cylindrical lens group 210 in the vertical direction is kept unchanged, so that the wide-screen anamorphic lens can compress the picture of the wide screen into a standard picture area, and the compressed picture shot by the wide-screen anamorphic lens can be restored to obtain a wide-screen picture and a video after being deformed and corrected by the image correction module, thereby meeting the requirements of users for wide-screen shooting of mobile terminals.
The cylindrical lens has a generally cylindrical or semi-cylindrical overall shape, and is understood to be a cylindrical glass body which is longitudinally sectioned. The axis of the cylindrical lens is the axis of the cylindrical glass body, and the cylindrical lens comprises a cylindrical surface and a plane; the cylindrical surface of the cylindrical lens is a parallel surface in a direction parallel to the axis and a circular surface in a direction perpendicular to the axis. The direction of the cylindrical lens parallel to the axis is the axial meridian direction, the direction of the cylindrical lens vertical to the axis is the refractive power meridian direction, and the radiuses of the cylindrical lens in the axial meridian direction and the refractive power meridian are different, so that the cylindrical lens has different magnifications on the axial meridian and the refractive power meridian.
In this embodiment, the mobile terminal may be a mobile electronic terminal such as a mobile phone and a tablet computer.
In this embodiment, an optical schematic diagram and an optical path diagram of the wide-screen anamorphic lens are respectively shown in fig. 3 and fig. 4, the wide-screen anamorphic lens includes a cylindrical lens group 210, a refraction element PM, and a spherical lens group 220, which are sequentially disposed from an object side to an image side, the refraction element PM is located on an optical path of an incident light incident through the cylindrical lens group 210 and refracts the incident light to the spherical lens group 220, and a mechanical center line of the cylindrical lens group 210 and a mechanical center line of the spherical lens group 220 are perpendicular to each other. In other embodiments, the refractive element PM may be further located between a plurality of lens combinations in the cylindrical lens group or a plurality of lens combinations in the spherical lens group.
In this embodiment, the cylindrical lens group includes three cylindrical lenses, the refraction element PM is any one of a plane mirror, a triangular prism and a pentaprism, and the spherical lens group includes four aspheric lenses. The wide-screen anamorphic lens arranged in the structural form has the visual effects of horizontal wiredrawing and elliptic out-of-focus light spots besides the horizontal compression deformation effect of the image, wherein the horizontal wiredrawing refers to that a horizontally extending light ray is formed on a light source for shooting the image, and the thickness of the light ray is related to the shooting distance, the light intensity of the light source and the deformation coefficient of the wide-screen anamorphic lens. Of course, it can be understood here that the number of the cylindrical lenses constituting the cylindrical lens group may also be four or more, and the number of the aspheric lenses constituting the spherical lens group may also be four or more, as long as the cylindrical lenses constituting the cylindrical lens group can "compress" incident light entering horizontally, while incident light entering in the vertical direction remains unchanged, and the spherical lenses constituting the spherical lens group can comprehensively correct the incident light, so as to increase the field angle of horizontal shooting of the lens, increase the aspect ratio of the actually shot image, and obtain wide-screen video or photos without sacrificing pixels.
In the present embodiment, the cylindrical lens group includes a first lens P1, a second lens P2, and a third lens P3 arranged in this order from the object side to the image side along the optical axis; the first lens P1 and the second lens P2 are cylindrical lenses having negative optical power, and the third lens P3 is a cylindrical lens having positive optical power. The spherical lens group includes a fourth lens P4, a fifth lens P5, a sixth lens P6, and a seventh lens P7 arranged in this order from the object side to the image side along the optical axis; the fourth lens P4, the fifth lens P5, the sixth lens P6, and the seventh lens P7 are all even-aspheric lenses. The aspherical surface coefficient of the aspherical lens satisfies the following equation:
Z＝cy 2/[1+{1－(1+k)c 2y 2}+1/2]+A4y4+A6y 6+A8y 8+A10y10
wherein: z is aspheric sagittal height, c is aspheric paraxial curvature, y is lens caliber, k is cone coefficient, A4Is a 4-order aspheric coefficient, A6Is a 6-degree aspheric surface coefficient, A8Is an 8 th order aspheric surface coefficient, A10Is a10 th order aspheric coefficient.
In this embodiment, the object-side surface and the image-side surface of the first lens element P1 are both concave at the paraxial region, the object-side surface of the second lens element P2 is convex at the paraxial region, the image-side surface of the second lens element P2 is concave at the paraxial region, the image-side surface of the third lens element P3 is convex at the paraxial region, an included angle between a light incident surface of the refractive element PM and a mechanical center line of the third lens element P3 is 45 degrees, the image-side surface and the object-side surface of the fourth lens element P4 are both convex at the paraxial region, and are biconvex lenses, the object-side surface of the fifth lens element P5 is concave at the paraxial region, and the image-side surface and the object-side surface of the sixth lens element P6 are both convex at the paraxial region and are biconvex lenses; the object-side surface of the seventh lens element P7 is convex at the paraxial region, the image-side surface of the seventh lens element P7 is concave at the paraxial region, and both the object-side surface and the image-side surface have inflection points at the off-axis regions.
The thickness of the wide screen anamorphic lens is not more than 12 mm. In the present embodiment, the thickness of the cylindrical lens group along the optical axis is 5.50 mm; the thickness of the spherical lens group along the optical axis direction is 5.20 mm; the thickness of the refractive element PM along the optical axis direction is 2.40 mm. The whole wide-screen anamorphic lens is small in size, the mechanical central line of the cylindrical lens group is perpendicular to the mechanical central line of the spherical lens group, and the wide-screen anamorphic lens can be embedded in a mobile terminal with a small thickness. Of course, the sizes of the cylindrical lens set, the spherical lens set and the refractive element PM can also be reduced in a suitable scale.
The parameters of the individual lenses of this example are listed below:
cylindrical aspheric coefficients:
1、K＝－1.1411，A4＝9.0e－4，A6＝6.37e－5，A8＝2.5772e－6，A10＝－7.20396e－7；
2、K＝－1.6136，A4＝1.9e－3，A6＝2.00e－4，A8＝5.01650e－5，A10＝－6.30190e－6；
5、K＝－3.8613，A4＝－3.0e－4，A6＝－1.00e－4，A8＝5.6852e－6；
aspherical surface coefficient:
8、K＝－0.3923，A4＝8.2e－3，A6＝4.00e－4，A8＝9.000e－4，A10＝－5.400e－3；
9、K＝4.9815，A4＝1.87e－2，A6＝－5.1e－3，A8＝－1.07e－2，A10＝3.60e－3；
11、K＝－4.9919，A4＝－3.18e－2，A6＝5.8e－3，A8＝－1.42e－2，A10＝1.27e－2；
12、K＝－2.511，A4＝4.8448e－5，A6＝1.99e－2，A8＝－5.5e－3，A10＝7.5e－3；
13、K＝0.8828，A4＝－9.1e－3，A6＝7.0e－4，A8＝－7.0e－4，A10＝4.0e－4；
14、K＝1.3393，A4＝－4.1e－2，A6＝2.69e－2，A8＝－1.45e－2，A10＝2.8e－3；
15、K＝4.9988，A4＝－3.671e－1，A6＝1.166e－1，A8＝－1.60e－2，A10＝－4.90e－3；
16、K＝－4.8512，A4＝－1.256e－1，A6＝5.34e－2，A8＝－1.22e－2，A10＝7.0e－4；
where k is a conic coefficient, a4 is a 4-th aspheric coefficient, a6 is a 6-th aspheric coefficient, A8 is an 8-th aspheric coefficient, and a10 is a 10-th aspheric coefficient.
FIG. 5 is a graph showing an optical distortion curve of a lens assembly according to an embodiment, wherein "img Ht" in FIG. 3 is an image height, and the image height is an image height; fig. 6 is a graph (optical Transfer function) of mtf (modulation Transfer function) Transfer function of the lens assembly according to the first embodiment, which can comprehensively reflect the imaging quality of the system, and the smoother the curve shape and the higher the height with respect to the X axis, prove that the imaging quality of the system is better and the lens has higher definition.
Example two
The difference from the first embodiment is that the positions of the cylindrical lens group and the spherical lens group are interchanged, the spherical lens group composed of four aspherical lenses is used as a front lens group, and the cylindrical lens group composed of three cylindrical lenses is used as a rear lens group; compared with the wide-screen anamorphic lens with the structural arrangement form of the embodiment, the wide-screen anamorphic lens with the structural arrangement form still has the function of image extrusion deformation shooting, but the shot image lacks the visual effects of horizontal wiredrawing and oval out-of-focus light spots.
EXAMPLE III
The wide-screen anamorphic lens is different from the first embodiment in that the wide-screen anamorphic lens comprises two groups of cylindrical lens groups and one group of spherical lens group, and the first cylindrical lens group, the spherical lens group and the second cylindrical lens group are sequentially arranged from an object side to an image side along an optical axis. The wide-screen deformable lens in the arrangement mode not only has the effect of horizontal compression deformation of the picture, but also has the visual effects of horizontal wiredrawing and oval out-of-focus light spots, and the optical effect is the same as that of the scheme in the embodiment.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.
Claims (12)
1. A mobile terminal with a built-in anamorphic lens is characterized in that a wide-screen anamorphic lens is arranged on the mobile terminal; the wide-screen anamorphic lens comprises a cylindrical lens group and a spherical lens group, wherein the cylindrical lens group at least comprises a group of negative focal power cylindrical lenses and a group of positive focal power cylindrical lenses.
2. The mobile terminal with built-in anamorphic lens of claim 1, wherein the cylindrical lens group and the spherical lens group are arranged in order along an optical axis from an object side to an image side.
3. The mobile terminal with a built-in anamorphic lens according to claim 1 or 2, wherein the cylindrical lens group comprises a first lens, a second lens and a third lens arranged in order from an object side to an image side along an optical axis, the first lens and the second lens are negative power cylindrical lenses, and the third lens is a positive power cylindrical lens.
4. A mobile terminal with built-in anamorphic lens according to claim 1 or 2, wherein the spherical lens group comprises at least four aspherical lenses.
5. The mobile terminal with built-in anamorphic lens of claim 4, wherein the spherical lens group comprises a fourth lens, a fifth lens, a sixth lens and a seventh lens arranged in order from an object side to an image side along an optical axis; the fourth lens, the fifth lens, the sixth lens and the seventh lens are all even aspheric lenses.
6. The mobile terminal with a built-in anamorphic lens of claim 2, wherein a refractive element is disposed between the cylindrical lens group and the spherical lens group, the refractive element is located on a light path of an incident light beam incident through the cylindrical lens group and refracts the incident light beam to the spherical lens group.
7. The mobile terminal with built-in anamorphic lens of claim 6 wherein the mechanical centerline of the cylindrical lens group and the mechanical centerline of the spherical lens group are perpendicular to each other.
8. The mobile terminal with built-in anamorphic lens of claim 6 wherein the refractive element is a triangular prism or a flat mirror or a pentaprism.
9. The mobile terminal with built-in anamorphic lens of claim 1, wherein the wide screen anamorphic lens has an anamorphic coefficient ranging from 1.33 to 2.0.
10. The mobile terminal with built-in anamorphic lens of claim 1, wherein the thickness of the wide screen anamorphic lens is no greater than 12 mm.
11. The mobile terminal with a built-in anamorphic lens of claim 1, wherein the wide screen anamorphic lens is mounted on the mobile terminal in-line.
12. The mobile terminal with the built-in anamorphic lens of claim 1, wherein the mobile terminal is a mobile phone or a tablet computer.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2020/120801 WO2022032855A1 (en) | 2020-08-14 | 2020-10-14 | Mobile terminal having built-in anamorphic lens |
| JP2020570003A JP2022537467A (en) | 2020-08-14 | 2020-10-14 | A mobile device with a built-in anamorphic lens |
| EP20815704.0A EP3975538A1 (en) | 2020-08-14 | 2020-10-14 | Mobile terminal having built-in anamorphic lens |
| US17/101,219 US11249288B2 (en) | 2019-09-26 | 2020-11-23 | Mobile terminal with a built-in anamorphic lens |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010822456 | 2020-08-14 | ||
| CN2020108224561 | 2020-08-14 |
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| CN114079687A true CN114079687A (en) | 2022-02-22 |
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| CN202011070143.1A Active CN114079687B (en) | 2019-09-26 | 2020-09-30 | A mobile terminal with built-in anamorphic lens |
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| CN (1) | CN114079687B (en) |
| WO (1) | WO2022032729A1 (en) |
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| CN114967057A (en) * | 2022-06-06 | 2022-08-30 | 浙江舜宇光学有限公司 | Optical imaging lens group |
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| Publication number | Publication date |
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| CN114079687B (en) | 2025-02-07 |
| WO2022032729A1 (en) | 2022-02-17 |
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