CN110749975A - Lens module and electronic device - Google Patents
Lens module and electronic device Download PDFInfo
- Publication number
- CN110749975A CN110749975A CN201911053403.1A CN201911053403A CN110749975A CN 110749975 A CN110749975 A CN 110749975A CN 201911053403 A CN201911053403 A CN 201911053403A CN 110749975 A CN110749975 A CN 110749975A
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- lens
- central
- group
- image sensor
- central axis
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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
-
- 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
- G02B3/00—Simple or compound lenses
- G02B3/0006—Arrays
Abstract
The application discloses lens module and electron device. The lens module includes: an image sensor; and the lens group is located in the outer side of the image sensor, the lens group comprises a plurality of lenses, the lenses are close to the image sensor in the orientation direction, the lenses are sequentially arranged and are right opposite to the image sensor, the lenses which are most adjacent to the image sensor are array lenses, the array lenses comprise a central lens part and at least one group of lens parts, each lens part group comprises a plurality of lens parts and the rest of the lens parts, the central axis of the lens is collinear with the central axis of the central lens part, and the lens parts of the lens parts group are used as the central axis of the central lens part to form an annular array and are arranged around the central lens part. According to the lens module of the embodiment of the application, the thickness of the lens module is favorably reduced.
Description
Technical Field
The present application relates to the field of electronic technologies, and in particular, to a lens module and an electronic device.
Background
The traditional optical imaging lens adopts four-piece and five-piece lens structures, but the four-piece and five-piece lens structures have limitations in the aspects of refractive power distribution, aberration astigmatism correction, sensitivity distribution and the like, and cannot further meet the imaging requirements of higher specifications. In order to obtain better imaging quality, six-piece and seven-piece lens structures gradually appear in the design of an optical imaging system, so that the overall length of the lens is further increased, the thickness of the electronic device is further increased, and the light and thin design of the electronic device is not facilitated.
Disclosure of Invention
The application provides a lens module, which is thinner.
The application also provides an electronic device comprising the lens module.
According to the lens module of this application embodiment, include: an image sensor; and the lens group is positioned on the outer side of the image sensor, the lens group comprises a plurality of lenses, the lenses are close to the image sensor in the direction of facing the image sensor, the lenses are sequentially arranged and just opposite to the image sensor, the lenses which are most adjacent to the image sensor are array lenses, the lenses are all single lenses, the array lenses comprise a central lens part and at least one group of lens parts, the lens parts comprise a plurality of lens parts, the central axis of the lenses is collinear with the central axis of the central lens part, and the lens parts are arranged in an annular array manner by taking the central axis of the central lens part as a central line and surround the central lens part.
According to the lens module of this application embodiment, lens through with nearest image sensor sets up to the array lens, thereby utilize an array lens to replace nearest image sensor's among the prior art one, two or three single lens are in order to realize the purpose of aberration correction, and then restore out the image through corresponding algorithm, under the prerequisite of the imaging quality of assurance lens group, be favorable to reducing the thickness of lens module, and under the prerequisite that the thickness of lens module reduces, FNO design for the lens module provides certain design allowance, be favorable to setting FNO according to actual need bigger or littleer, optimize the FNO of lens module.
The electronic device according to the embodiment of the application comprises the lens module.
According to the electronic device of the embodiment of the application, the lens module is arranged, so that the light and thin design of the electronic device is facilitated.
Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.
Drawings
The above and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a schematic view of a lens module according to some embodiments of the present application;
FIG. 2 is a schematic view of an array lens according to some embodiments of the present application;
fig. 3 is a schematic diagram of an electronic device according to some embodiments of the present application, wherein the electronic device is a mobile phone.
Reference numerals:
an electronic device 1000;
a lens module 100;
a lens group 10; a lens 1; an array lens 2; a lens section 21; a central lens portion 22;
an image sensor 20.
Detailed Description
Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application.
The lens module 100 and the electronic device 1000 according to the embodiment of the present application are described below with reference to the drawings. The electronic device 1000 may be a mobile phone, a tablet computer, a car recorder, or a motion camera.
As shown in fig. 1, a lens module 100 according to an embodiment of the present application includes: an image sensor 20 and a set of lenses 10.
Specifically, the lens group 10 is located outside the image sensor 20, and the lens group 10 includes a plurality of lenses 1, and the plurality of lenses 1 are sequentially arranged in a direction toward the image sensor 20 and directly face the image sensor 20. That is, the image sensor 20 is located inside the lens group 10 to receive image information of an object, and a plurality of lenses 1 are sequentially arranged and face each other in a direction from the object to the image sensor 20, and each lens 1 faces the image sensor 20.
Alternatively, the plurality of lenses 1 may be three or more. In particular, the number of lenses 1 may be five or more, for example six, seven, eight, nine or ten. The larger the number of the lenses 1, the better the contribution to the distribution of the refractive power, the correction of the astigmatism of the aberrations, the distribution of the sensitivity, etc.
Generally, with the multi-piece lens structure, the first few single lens pieces near the object in the direction from the object to the lens module mainly have the function of correcting higher order aberrations as long as they have the main body imaging function, and the latter few single lens pieces adjacent to the image sensor 20. In the related art, the optical imaging lens mostly adopts a four-piece lens structure and a five-piece lens structure, but the four-piece lens structure and the five-piece lens structure have limitations in the aspects of refractive power distribution, aberration astigmatism correction, sensitivity distribution and the like, and cannot further meet the imaging requirements of higher specifications. In order to obtain better imaging quality and increase the number of lenses, the six-lens and seven-lens structures gradually appear in the design of the optical imaging system, which further increases the overall length of the lens, further increases the thickness of the electronic device 1000, and is not favorable for the light and thin design of the electronic device 1000. In the prior art, the lens 1 closest to the image sensor 20 is generally curved toward the image sensor 20, and the lens 1 closest to the image sensor 20 is thick as a whole.
In view of this, in the present application, the lens 1 closest to the image sensor 20 is the array lens 2, that is, in the plurality of lens 1, the lens 1 closest to the image sensor 20 is the array lens 2, and the remaining lens 1 is the non-array lens, that is, the single lens. For example, as shown in fig. 1, when the lens group 10 includes five lens pieces 1, the lens piece 1 closest to the image sensor 20 is an array lens piece 2, and the remaining four lens pieces 1 are all single lens pieces.
Specifically, as shown in fig. 2, the array lens 2 includes a central lens portion 22 and at least one lens portion group. That is, the array mirror 2 includes one central lens portion 22 and one lens portion group, or the array mirror 2 includes one central lens portion 22 and a plurality of lens portion groups. Here, the plurality of lens portion groups may be two or more groups.
As shown in fig. 2, the lens unit group includes a plurality of lens portions 21, the plurality of lens portions 21 of the lens unit group are arranged in an annular array around the central axis of the central lens portion 22 and surround the central lens portion 22, when the lens units are a plurality of groups, the plurality of groups of lens units are arranged in sequence in a direction (i.e. radial direction) away from the central axis, and the central axes of the remaining lenses 1 are collinear with the central axis of the central lens portion 22. Thus, the central axes of all the lenses 1 are collinear, i.e., L1 shown in fig. 1, the central axis L1 is the central axis of the central lens portion 22, the lens portions 21 of each group of lens portions are arranged in an annular array with the central axis L1 as the central axis, and the lens portions 21 of each group of lens portions are identical in shape and size.
By setting the lens 1 closest to the image sensor 20 as the array lens 2, the array lens 2 does not need to be bent towards the image sensor 20, and the array lens 2 is straight or substantially straight, so that the thickness of the array lens 2 is relatively thin, one, two or three single lens lenses closest to the image sensor 20 in the prior art are replaced by one array lens 2 to achieve the purpose of aberration correction, and then an image is restored through a corresponding algorithm, on the premise of ensuring the imaging quality of the lens group 10, the thickness of the lens module 100 is favorably reduced, and on the premise of reducing the thickness of the lens module 100, a certain design margin is provided for FNO design of the lens module 100, the FNO is favorably set to be larger or smaller according to actual needs, and the FNO of the lens module 100 is optimized.
According to lens module 100 of the embodiment of this application, through setting up lens 1 nearest to image sensor 20 to array lens 2, thereby utilize one array lens 2 to replace nearest to image sensor 20 among the prior art, two or three single lens 1 are with the purpose of realizing aberration correction, and then restore out the image through corresponding algorithm, under the prerequisite of the image quality of guaranteeing lens group 10, be favorable to reducing lens module 100's thickness, and under the prerequisite that lens module 100's thickness reduces, certain design allowance is provided for lens module 100's FNO design, be favorable to setting FNO according to actual need bigger or littleer, optimize lens module 100's FNO.
In short, the lens module 100 according to the embodiment of the present application is beneficial to optimizing the optical overall length of the lens module 100.
In some embodiments of the present application, the shape of any two lens portions 21 is the same, that is, the shape of the lens portions located in the same group of lens portions is the same as that of the lens portions located in different groups of lens portions. Therefore, the processing technology is simplified, the processing and the manufacturing of the array lens 2 are facilitated, and the imaging effect is improved.
Specifically, the central lens portion 22 and the lens portions 21 have the same shape, that is, all the lens portions 21 have the same shape, and the lens portions 21 have the same shape as the central lens portion 22. Therefore, the processing technology is simplified, the processing and the manufacturing of the array lens 2 are facilitated, and the imaging effect is improved.
In some embodiments of the present application, the projection of each lens portion 21 is formed in a circular shape in a plane perpendicular to the central axis. Thereby, the processing and manufacturing of the array lens 2 can be facilitated.
Alternatively, the projection of each lens portion 21 is formed in a circular shape and the projection of the central lens portion 22 is also formed in a circular shape in a plane perpendicular to the central axis. Therefore, the structure is simple, and the processing and the manufacturing of the array lens 2 are convenient.
Of course, the present application is not limited thereto, and in other alternative embodiments, the shape of each lens portion 21 may also be formed in other shapes, for example, the projection of each lens portion 21 in a plane perpendicular to the central axis is formed in an elliptical or square shape.
In some embodiments of the present application, the two arbitrary lens portions 21 have the same size, and the lens portions 21 have the same size as the central lens portion 22, that is, the lens portions in the same group of lens portions and the lens portions in different groups of lens portions have the same size and shape, and the lens portions 21 have the same size and shape as the central lens portion 22. Therefore, the processing technology is simplified, the processing and the manufacturing of the array lens 2 are facilitated, and the imaging effect is improved.
In other embodiments of the present application, the projections of the lens portions 21 of two adjacent groups of lens portions differ in radius in a plane perpendicular to the central axis. Thereby, it is advantageous to set the size of the projection of the lens portion 21 according to actual needs to meet imaging requirements.
Further, the radius of the lens portion 21 of the lens portion group adjacent to the central lens portion 22 may be the same as or different from the radius of the central lens portion 22. Alternatively, the radius of the lens portion 21 of the lens portion group adjacent to the central lens portion 22 is the same as the radius of the central lens portion 22. Thereby, the processing and manufacturing of the array lens 2 can be facilitated.
According to some embodiments of the present application, the projections of any two adjacent lens portions 21 of each group of lens portions are tangential in a plane perpendicular to the central axis. Therefore, each lens portion 21 can be independently imaged, the influence between two adjacent lens portions 21 is avoided, and the imaging effect of the array lens 2 is improved.
In other embodiments, projections of any two adjacent lens portions 21 in each group of lens portions are evenly spaced apart in a plane perpendicular to the central axis. Therefore, the imaging effect of the array lens 2 is improved, and the processing and the manufacturing are convenient.
Of course, the present application is not limited thereto, and projections of any adjacent two lens portions 21 in each group of lens portions may also intersect in a plane perpendicular to the central axis. This is advantageous in improving the connection strength between two adjacent lens portions 21.
In some embodiments of the present application, the array lens 2 further includes a substrate on which the lens portions 21 and the central lens portion 22 are integrally formed, and the substrate is provided to improve the connection strength between the adjacent lens portions 21.
Alternatively, each lens section 21 and the central lens section 22 is a lenticular lens section 21. For example, the substrate has a first surface and a second surface opposite to each other, the first surface is provided with a plurality of first protrusions, the second surface is provided with a plurality of second protrusions, the plurality of first protrusions and the plurality of second protrusions are opposite to each other, the first protrusion located at the center and the second protrusion located at the center and the portion of the substrate between the first protrusion located at the center and the second protrusion located at the center define a central lens portion 22, and the remaining first protrusion and the second protrusion facing each other and the portion of the substrate between the first protrusion and the second protrusion define a lens portion 21.
Alternatively, the surface of each first convex portion is a spherical surface, and the surface of each second convex portion is a spherical surface, so that the processing and manufacturing can be facilitated. Of course, the present application is not limited thereto, and the surface of each first convex portion may also be an aspheric surface, and the surface of each second convex portion may be an aspheric surface, for example, the surface of each first convex portion and the surface of the second convex portion are respectively formed by connecting a plurality of non-parallel planes. Thus, the aberration correction effect is more favorably improved, and the imaging effect is favorably improved.
Alternatively, each lens portion 21 and the central lens portion 22 may also be a plano-convex lens, a concave-convex lens, or the like. Therefore, the structure is simple, and the processing and the manufacturing are convenient.
According to some embodiments of the present application, in a plane perpendicular to the central axis, in two adjacent lens unit groups, a circle in which outer ends of projections of the plurality of lens portions 21 of the lens unit group located on the inner side are located is the same as a circle in which inner ends of projections of the plurality of lens portions 21 of the lens unit group located on the outer side are located. That is, of the two adjacent lens unit groups, the circle in which the one ends of the projections of the plurality of lens units 21 of the inner lens unit group (i.e., the lens unit group adjacent to the central lens unit 22) which are distant from the central axis L1 are located is the circle O1, the circle in which the one ends of the projections of the plurality of lens units 21 of the outer lens unit group (i.e., the lens unit group distant from the central lens unit 22) which are distant from the central axis L1 are located is the circle O2, and the circle O1 and the circle O2 are the same circle. Therefore, the structure of the array lens 2 is further optimized, the structure of the plurality of lens portions 21 is more compact, and the imaging effect is further improved.
Of course, the present application is not limited to this, and in the two adjacent lens unit groups, in the plane perpendicular to the central axis, the circle in which the outer ends of the projections of the plurality of lens units 21 of the lens unit group located on the inner side partially overlap the circle in which the inner ends of the projections of the plurality of lens units 21 of the lens unit group located on the outer side partially overlap. For example, referring to FIG. 2, circle O1 is located within circle O2. Therefore, the lens group positioned on the inner side is completely separated from the lens group positioned on the outer side, the structure is simple, and the processing and the manufacturing are convenient.
As another example, circle O2 lies within circle O1. Thereby, the lens group located on the inner side intersects with the lens group located on the outer side. This is advantageous in improving the connection strength of the array lens 2.
Optionally, two adjacent lenses 1 are connected by optical cement. Therefore, the cost is low and the connection is reliable.
The electronic device 1000 according to the embodiment of the present application includes the lens module 100 described above.
According to the electronic device 1000 of the embodiment of the application, by setting the lens module 100, by setting the lens 1 closest to the image sensor 20 as the array lens 2, one, two or three single lens lenses 1 closest to the image sensor 20 in the prior art are replaced by one array lens 2 to achieve the purpose of aberration correction, and then an image is restored through a corresponding algorithm, on the premise of ensuring the imaging quality of the lens module 10, the thickness of the lens module 100 is favorably reduced, and on the premise of reducing the thickness of the lens module 100, a certain design margin is provided for FNO design of the lens module 100, so that FNO can be set to be larger or smaller according to actual needs, FNO of the lens module 100 is optimized, and further the light and thin design of the electronic device 1000 is achieved.
In the description herein, reference to the description of the terms "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the present application have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the application, the scope of which is defined by the claims and their equivalents.
Claims (10)
1. A lens module, comprising:
an image sensor; and
the lens group, the lens group is located image sensor's outside, the lens group includes a plurality of lenses, and is a plurality of the lens is being close to in the orientation image sensor arrange in proper order and with image sensor just right, and the most adjacent image sensor's lens is the array lens, all the other the lens is single lens, the array lens includes a central lens portion and at least a set of lens portion group, lens portion group includes a plurality of lens portions, all the other the central axis of lens with the central axis of central lens portion is the collineation all, a plurality of lens portion group lens portion with the central axis of central lens portion is the central axis of central lens portion and is annular array form and arrange and encircle central lens portion.
2. The lens module as claimed in claim 1, wherein any two of the lens portions have the same shape.
3. The lens module as claimed in claim 2, wherein the central lens portion and the lens portion have the same shape.
4. The lens module as claimed in claim 2, wherein a projection of each of the lens portions is formed in a circular shape in a plane perpendicular to the central axis.
5. The lens module as recited in claim 4, wherein projections of any two adjacent lens portions in each group of lens portions are tangent in a plane perpendicular to the central axis.
6. The lens module as claimed in claim 4, wherein projections of any two adjacent lens portions intersect in a plane perpendicular to the central axis.
7. The lens module as claimed in claim 4, wherein in a plane perpendicular to the central axis, in two adjacent lens unit groups, a circle on which outer ends of projections of the plurality of lens units of the lens unit group located at an inner side are located is the same as a circle on which inner ends of projections of the plurality of lens units of the lens unit group located at an outer side are located.
8. The lens module as claimed in claim 1, wherein each of the lens portions is a lenticular lens.
9. The lens module as claimed in claim 1, wherein the number of the lenses is five or more.
10. An electronic device, comprising the lens module according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911053403.1A CN110749975A (en) | 2019-10-31 | 2019-10-31 | Lens module and electronic device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911053403.1A CN110749975A (en) | 2019-10-31 | 2019-10-31 | Lens module and electronic device |
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| CN110749975A true CN110749975A (en) | 2020-02-04 |
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| CN201911053403.1A Pending CN110749975A (en) | 2019-10-31 | 2019-10-31 | Lens module and electronic device |
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Cited By (1)
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| CN112379501A (en) * | 2020-09-16 | 2021-02-19 | 常州市瑞泰光电有限公司 | Lens module and imaging system |
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Application publication date: 20200204 |