CN117930459A - Optical imaging lens - Google Patents
Optical imaging lens Download PDFInfo
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- CN117930459A CN117930459A CN202211263478.4A CN202211263478A CN117930459A CN 117930459 A CN117930459 A CN 117930459A CN 202211263478 A CN202211263478 A CN 202211263478A CN 117930459 A CN117930459 A CN 117930459A
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- 238000012634 optical imaging Methods 0.000 title claims abstract description 139
- 125000006850 spacer group Chemical group 0.000 claims abstract description 181
- 230000003287 optical effect Effects 0.000 claims abstract description 97
- 230000005499 meniscus Effects 0.000 claims abstract description 5
- 238000000926 separation method Methods 0.000 claims description 22
- 239000013256 coordination polymer Substances 0.000 claims description 4
- 238000003384 imaging method Methods 0.000 description 41
- 230000004075 alteration Effects 0.000 description 17
- 230000001976 improved effect Effects 0.000 description 9
- 238000000465 moulding Methods 0.000 description 9
- 238000004519 manufacturing process Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 7
- 201000009310 astigmatism Diseases 0.000 description 6
- 230000002349 favourable effect Effects 0.000 description 6
- 230000002829 reductive effect Effects 0.000 description 6
- 230000009286 beneficial effect Effects 0.000 description 5
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- 238000013461 design Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
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- 230000004907 flux Effects 0.000 description 3
- 230000014509 gene expression Effects 0.000 description 2
- 230000000670 limiting effect Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000012938 design process Methods 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
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Classifications
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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
- G02B13/004—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 four lenses
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
- G02B7/021—Mountings, adjusting means, or light-tight connections, for optical elements for lenses for more than one lens
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- Optics & Photonics (AREA)
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Abstract
The application discloses an optical imaging lens. The optical imaging lens includes a lens group, a plurality of spacers, and a barrel for accommodating the lens group and the plurality of spacers. The lens group sequentially comprises a first lens, a second lens, a third lens and a fourth lens with focal power from an object side to an image side along an optical axis. The plurality of spacers includes a first spacer, a second spacer, and a third spacer. The positive and negative properties of the optical powers of the first lens and the second lens are different, the positive and negative properties of the optical powers of the third lens and the fourth lens are different, and at least one of the first lens to the fourth lens has a meniscus shape. The optical imaging lens satisfies: 0 < (d2s.times.d3s)/(CT 2. Times.T23) < 70.
Description
Technical Field
The application relates to the field of optical elements, in particular to an optical imaging lens.
Background
In the information age, smartphones are favored by many consumers for their small, convenient and rich functionality. Meanwhile, the huge market of smart phones is continuously stimulating mobile phone manufacturers to seek technological breakthroughs in the aspects of mobile phone processors, cruising ability, audio and video output, camera shooting technology and the like. Particularly, the camera shooting technology of smart phones is becoming one of the main research and development directions for many mobile phone manufacturers to increase the competitiveness of their own products, wherein the wide-angle lens is being focused by many mobile phone manufacturers at an ultra-large field angle and a large shooting range.
However, in the wide-angle lens, the existence of stray light phenomenon and deviation of the assembly stability seriously affect the imaging quality of the imaging lens. For example, in general, the optical power of each lens in the optical imaging lens is not reasonably set, which may lead to a disorder of deflection paths of light rays in the optical imaging lens, and stray light is easily generated. On the other hand, if the design such as the position of the spacer in the optical imaging lens is not reasonable, the deflection path of the light in the optical imaging lens may be disordered, and stray light may be generated easily. In addition, if the design such as the position of the spacer in the optical imaging lens is not reasonable, the stability among the lenses may be poor, so that the assembly stability of the optical imaging lens is poor, the yield is low, and the like.
Therefore, how to reasonably arrange each lens and the spacer in the optical imaging lens and reasonably set the optical parameters of the optical imaging lens, so as to control the light trend in the optical imaging lens and optimize the assembly stability of the optical imaging lens, and improve the reliability and the yield of the optical imaging lens is one of the difficulties to be solved in the optical imaging field.
Disclosure of Invention
An aspect of the present application provides an optical imaging lens including a lens group, a plurality of spacers, and a barrel for accommodating the lens group and the plurality of spacers. The lens group sequentially comprises a first lens, a second lens, a third lens and a fourth lens with focal power from an object side to an image side along an optical axis, wherein positive and negative properties of the focal power of the first lens and the focal power of the second lens are different, positive and negative properties of the focal power of the third lens and the focal power of the fourth lens are different, and at least one lens from the first lens to the fourth lens has a meniscus shape. A plurality of spacers including a first spacer located on an image side of the first lens and in contact with an image side portion of the first lens; a second spacer located on the image side of the second lens and in contact with the image side portion of the second lens; and a third spacer located on the image side of the third lens and in contact with the image side portion of the third lens. The optical imaging lens can satisfy: 0 < (d2s×d3s)/(CT 2×T23) < 70, wherein d2s is the inner diameter of the object side surface of the second spacer, d3s is the inner diameter of the object side surface of the third spacer, T23 is the air spacing of the second lens and the third lens on the optical axis, and CT2 is the center thickness of the second lens on the optical axis.
In one embodiment, at least one of the object-side surface of the first lens to the image-side surface of the fourth lens is an aspherical mirror surface.
In one embodiment, the optical imaging lens may satisfy: -80 < R5/D1s-R6/D1s < 60, wherein R5 is the radius of curvature of the object-side surface of the third lens, R6 is the radius of curvature of the image-side surface of the third lens, D1s is the inner diameter of the object-side surface of the first spacer, and D1s is the outer diameter of the object-side surface of the first spacer.
In one embodiment, the optical imaging lens may satisfy: 0 < (CP 1/CP 2) × (CT 2/CT 1) < 60, wherein CP1 is the maximum thickness of the first spacer, CP2 is the maximum thickness of the second spacer, CT1 is the center thickness of the first lens on the optical axis, and CT2 is the center thickness of the second lens on the optical axis.
In one embodiment, the optical imaging lens may satisfy: 0mm -1＜(EP01+EP12)/(T12×T23)＜40.0mm-1, wherein EP01 is a separation distance of an object side end of the lens barrel to an object side surface of the first spacer in a direction along the optical axis, EP12 is a separation distance of an image side surface of the first spacer to an object side surface of the second spacer in a direction along the optical axis, T12 is an air separation of the first lens and the second lens on the optical axis, and T23 is an air separation of the second lens and the third lens on the optical axis.
In one embodiment, the optical imaging lens may satisfy: 0 < CPi/CTi < 70, wherein CPi is the maximum thickness of the ith spacer and CTi is the central thickness of the ith lens on the optical axis, i is selected from 1,2 and 3.
In one embodiment, the optical imaging lens may satisfy: (d1m+d2m)/CT 3 < 45, where D1m is the outer diameter of the image side surface of the first spacer, D2m is the outer diameter of the image side surface of the second spacer, and CT3 is the center thickness of the third lens on the optical axis.
In one embodiment, the optical imaging lens may satisfy: 0 < EP12/T23+EP23/T34 < 45, wherein EP12 is a separation distance in a direction along the optical axis of the image side surface of the first spacer to the object side surface of the second spacer, EP23 is a separation distance in a direction along the optical axis of the image side surface of the second spacer to the object side surface of the third spacer, T23 is an air separation of the second lens and the third lens on the optical axis, and T34 is an air separation of the third lens and the fourth lens on the optical axis.
In one embodiment, the optical imaging lens may satisfy: 0 < L/(ΣCT- ΣCP). Times.FNO < 12, wherein L is the distance on the optical axis from the object side end of the lens barrel to the image side end of the lens barrel, ΣCP is the sum of the maximum thicknesses of the first spacer, the second spacer and the third spacer, ΣCT is the sum of the center thicknesses on the optical axis of all lenses of the first lens to the fourth lens, FNO is the aperture value of the optical imaging lens.
In one embodiment, the optical imaging lens may satisfy: -30 < (f3×f)/(d3m× d3m) <0, where f is the total effective focal length of the optical imaging lens, f3 is the effective focal length of the third lens, D3m is the outer diameter of the image side of the third spacer, and D3m is the inner diameter of the image side of the third spacer.
In one embodiment, the optical imaging lens may satisfy: (d2s+d2m)/(d0s—d0m) < 30, wherein D2s is the outer diameter of the object side surface of the second spacer, D2m is the inner diameter of the image side surface of the second spacer, D0m is the inner diameter of the image side end of the lens barrel, and D0s is the outer diameter of the object side end of the lens barrel.
In one embodiment, the optical imaging lens may satisfy: 0 < (d3s+ct4)/(CP 3+cp 2) < 120, wherein CP2 is the maximum thickness of the second spacer, CP3 is the maximum thickness of the third spacer, D3s is the outer diameter of the object side surface of the third spacer, and CT4 is the center thickness of the fourth lens on the optical axis.
In one embodiment, the optical imaging lens may satisfy: f3 < 0mm, where f3 is the effective focal length of the third lens.
In one embodiment, the optical imaging lens may satisfy: f1 < 0mm and R1/R2 > 0, where f1 is the effective focal length of the first lens, R1 is the radius of curvature of the object-side surface of the first lens, and R2 is the radius of curvature of the image-side surface of the first lens.
In the exemplary embodiment of the application, in the four-piece wide-angle lens design process, by reasonably controlling the focal power and the surface shape of each lens, for example, the first lens and the second lens can have different focal powers with different positive and negative attributes, the third lens and the fourth lens can have different focal powers with different positive and negative attributes, and at least one lens from the first lens to the fourth lens can have a meniscus shape, which is beneficial to better balancing aberration and enabling the lens to achieve better image quality effect. On the basis, a plurality of interval elements are arranged between the first lens and the fourth lens, so that tiny deviation accumulated results generated by machining of the lenses can be compensated, the optical imaging lens still has the opportunities of correcting curvature of field and defocusing in the assembly stage, and the process yield is improved. Furthermore, on the basis of the above-mentioned focal power, surface shape and arrangement of the spacing element, the ratio of 0 < (d2s×d3s)/(CT 2×T23) < 70 can be matched, so that the inner diameters of the second spacing element and the third spacing element can be effectively controlled, the required light flux of the lens can be ensured under the condition of shielding stray light, and the thickness of the second lens and the distance between the second lens and the third lens can be controlled, so that the lens has good imaging capability and better stray light performance.
Drawings
Other features, objects and advantages of the present application will become more apparent upon reading of the detailed description of non-limiting embodiments, made with reference to the accompanying drawings in which:
Fig. 1A to 1C are schematic diagrams showing the structures of a lens barrel, a lens group, and respective spacers in three embodiments in the optical imaging lens of example 1, respectively;
Fig. 2A to 2D show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve, respectively, of the optical imaging lens of embodiment 1;
fig. 3A to 3C are schematic views showing the structures of a lens barrel, a lens group, and respective spacers in three embodiments in the optical imaging lens of example 2, respectively;
fig. 4A to 4D show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve, respectively, of the optical imaging lens of embodiment 2;
Fig. 5A to 5C are schematic views showing the structures of a lens barrel, a lens group, and respective spacers in three embodiments in the optical imaging lens of example 3, respectively;
Fig. 6A to 6D show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve, respectively, of the optical imaging lens of embodiment 3; and
Fig. 7 shows a partial parametric schematic of an optical imaging lens according to an embodiment of the present application.
Detailed Description
For a better understanding of the application, various aspects of the application will be described in more detail with reference to the accompanying drawings. It should be understood that the detailed description is merely illustrative of exemplary embodiments of the application and is not intended to limit the scope of the application in any way. Like reference numerals refer to like elements throughout the specification. The expression "and/or" includes any and all combinations of one or more of the associated listed items.
It should be noted that in the present specification, the expressions of first, second, third, etc. are only used to distinguish one feature from another feature, and do not represent any limitation on the feature. Accordingly, a first lens discussed below may also be referred to as a second lens or a third lens, and a first spacer may also be referred to as a second spacer or a third spacer, without departing from the teachings of the present application.
In the drawings, the thickness, size, and shape of the lenses have been slightly exaggerated for convenience of explanation. In particular, the spherical or aspherical shape shown in the drawings is shown by way of example. That is, the shape of the spherical or aspherical surface is not limited to the shape of the spherical or aspherical surface shown in the drawings. The figures are merely examples and are not drawn to scale. It should be understood that the thickness, size and shape of the spacers and the lens barrel have also been slightly exaggerated in the drawings for convenience of explanation.
Herein, the paraxial region refers to a region near the optical axis. If the lens surface is convex and the convex position is not defined, then the lens surface is convex at least in the paraxial region; if the lens surface is concave and the concave position is not defined, it means that the lens surface is concave at least in the paraxial region. The surface of each lens closest to the object is referred to as the object side of the lens, and the surface of each lens closest to the imaging plane is referred to as the image side of the lens. It will be appreciated that the surface of each spacer closest to the subject is referred to as the object side of the spacer, and the surface of each spacer closest to the imaging plane is referred to as the image side of the spacer. The surface of the lens barrel closest to the object is referred to as the object side end of the lens barrel, and the surface of the lens barrel closest to the imaging surface is referred to as the image side end of the lens barrel.
It will be further understood that the terms "comprises," "comprising," "includes," "including," "having," "containing," and/or "including," when used in this specification, specify the presence of stated features, elements, and/or components, but do not preclude the presence or addition of one or more other features, elements, components, and/or groups thereof. Furthermore, when a statement such as "at least one of the following" appears after a list of features that are listed, the entire listed feature is modified instead of modifying a separate element in the list. Furthermore, when describing embodiments of the application, use of "may" means "one or more embodiments of the application. Also, the term "exemplary" is intended to refer to an example or illustration.
Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be combined with each other. The following examples merely illustrate a few embodiments of the present application, which are described in greater detail and are not to be construed as limiting the scope of the application. It should be noted that, for those skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which are all within the scope of the present application, for example, the lens group (i.e., the first lens to the fourth lens) in each embodiment of the present application, the lens barrel structure, and the spacer may be arbitrarily combined, and the lens group in one embodiment is not limited to be combined with the lens barrel structure, the spacer, and the like in this embodiment. The application will be described in detail below with reference to the drawings in connection with embodiments.
The features, principles, and other aspects of the present application are described in detail below.
The optical imaging lens according to the exemplary embodiment of the present application may include a lens group, a plurality of spacers, and a barrel for accommodating the lens group and the plurality of spacers. The lens group may include four lenses having optical power, which are a first lens, a second lens, a third lens, and a fourth lens, respectively. The four lenses are arranged in order from the object side to the image side along the optical axis. Any two adjacent lenses in the first lens to the fourth lens can have a spacing distance. The lens barrel may have a plurality of stepped inner wall surfaces inside for bearing against the spacers and/or the lenses.
According to an exemplary embodiment of the present application, each of the first to fourth lenses may have an optical region for optical imaging and a non-optical region extending outward from an outer circumference of the optical region. In general, an optical region refers to a region of a lens for optical imaging, and a non-optical region is a structural region of the lens. In the assembly process of the optical imaging lens, spacers may be provided at non-optical regions of the respective lenses and the respective lenses may be respectively supported into the lens barrel. During imaging by the optical imaging lens, the optical area of each lens can transmit light from the object to form an optical path, forming a final optical image. It should be noted that for ease of description, the present application describes the individual lenses as being divided into two parts, an optical region and a non-optical region, but it should be understood that both the optical region and the non-optical region of the lens are formed as one piece during the manufacturing process, rather than as separate two parts.
The optical imaging lens according to an exemplary embodiment of the present application may include three spacers, respectively, a first spacer, a second spacer, and a third spacer, respectively, between the first lens to the fourth lens. In particular, the optical imaging lens may include a first spacer between the first lens and the second lens, which may rest against a non-optical region of an image side of the first lens; a second spacer between the second lens and the third lens, which can abut against a non-optical region of an image side surface of the second lens; and a third spacer positioned between the third lens and the fourth lens and capable of abutting against a non-optical area of an image side surface of the third lens. For example, the first spacer may be in contact with the non-optical region of the image side of the first lens while being in contact with the non-optical region of the object side of the second lens. For example, the object-side surface of the first spacer may be in contact with the non-optical region of the image-side surface of the first lens, and the image-side surface of the first spacer may be in contact with the non-optical region of the object-side surface of the second lens; similarly, the object-side surface of the third spacer may be in contact with the non-optical region of the image-side surface of the third lens, and the image-side surface of the third spacer may be in contact with the non-optical region of the object-side surface of the fourth lens. The application is beneficial to improving the performance, stability, yield, imaging quality and other advantages of the optical imaging lens by arranging the plurality of spacers and carrying the spacers on the inner wall of the lens barrel.
According to the exemplary embodiment of the application, by arranging a plurality of spacers between the first lens and the fourth lens, such as arranging the first spacer between the first lens and the second lens, arranging the second spacer between the second lens and the third lens, and arranging the third spacer between the third lens and the fourth lens, tiny deviation accumulation results generated by processing each lens can be compensated, so that the optical imaging lens still has the opportunity of correcting curvature of field and defocus in the assembly stage, and the process yield is improved.
According to an exemplary embodiment of the present application, the first lens and the second lens may have optical powers having different positive and negative properties, e.g., the first lens may have negative optical power and the second lens may have positive optical power; or the first lens may have positive optical power and the second lens may have negative optical power. The third lens and the fourth lens may have different powers of positive and negative properties, e.g., the third lens may have negative power and the fourth lens may have positive power; or the third lens may have positive optical power and the fourth lens may have negative optical power. For example, at least one lens of the first to fourth lenses may have a meniscus shape. The application is favorable for balancing aberration well by reasonably matching the focal power and the surface shape of each lens in the optical imaging lens, so that the lens achieves better image quality effect.
In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: 0 < (d2s×d3s)/(CT 2×T23) < 70, wherein d2s is the inner diameter of the object side surface of the second spacer, d3s is the inner diameter of the object side surface of the third spacer, T23 is the air spacing of the second lens and the third lens on the optical axis, and CT2 is the center thickness of the second lens on the optical axis. In the application, through the reasonable arrangement of the focal power and the surface area of the lens, the plurality of spacing elements and the lens barrel and the matching of 0 < (d2s×d3s)/(CT 2×T23) < 70, the required light flux can be ensured under the condition of shielding stray light by effectively controlling the inner diameters of the second spacing element and the third spacing element, and the thickness of the second lens and the distance between the second lens and the third lens can be controlled, so that the lens has good imaging capability and better stray light performance.
In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: -80 < R5/D1s-R6/D1s < 60, wherein R5 is the radius of curvature of the object-side surface of the third lens, R6 is the radius of curvature of the image-side surface of the third lens, D1s is the inner diameter of the object-side surface of the first spacer, and D1s is the outer diameter of the object-side surface of the first spacer. In the application, the light quantity entering the second lens can be controlled by changing the inner diameter of the first spacer, and the size of the second lens can be controlled by controlling the outer diameter of the first spacer, so that the purposes of improving imaging performance and reducing cost are finally realized. Therefore, the inner diameter and the outer diameter of the first spacer can be reasonably controlled when the R5/D1s-R6/D1s is less than-80 and less than 60, the optical area of the third lens can be smoother, the molding difficulty of the third lens is reduced, and the lens yield is improved.
In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: 0 < (CP 1/CP 2) × (CT 2/CT 1) < 60, wherein CP1 is the maximum thickness of the first spacer, CP2 is the maximum thickness of the second spacer, CT1 is the center thickness of the first lens on the optical axis, and CT2 is the center thickness of the second lens on the optical axis. The lens meets the requirement that (CP 1/CP 2) x (CT 2/CT 1) is less than 60, the thickness of the optical areas of the first lens and the second lens can be reasonably controlled, the molding difficulty of the first lens and the second lens is reduced, the stray light phenomenon generated in the molding process of the first lens and the second lens is reduced, and the quality of the lens can be further improved.
In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: 0mm -1＜(EP01+EP12)/(T12×T23)＜40.0mm-1, wherein EP01 is a separation distance of an object side end of the lens barrel to an object side surface of the first spacer in a direction along the optical axis, EP12 is a separation distance of an image side surface of the first spacer to an object side surface of the second spacer in a direction along the optical axis, T12 is an air separation of the first lens and the second lens on the optical axis, and T23 is an air separation of the second lens and the third lens on the optical axis. Satisfies 0mm -1＜(EP01+EP12)/(T12×T23)＜40.0mm-1, can control the intensity of lens cone thing side end, the thickness of first spacer, the thickness in the marginal zone of first lens and second lens betterly, improves the equipment stability and the shaping stability of first lens and second lens effectively, and then improves the performance and the yield of camera lens.
In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: 0 < CPi/CTi < 70, wherein CPi is the maximum thickness of the ith spacer and CTi is the central thickness of the ith lens on the optical axis, i is selected from 1,2 and 3. It should be appreciated that when the thickness of the spacer is too high, the cross-sectional area of the inner diameter surface of the spacer may be significantly increased, so that the risk of stray light reflected from the cross-section by light is easily increased, and the thicker spacer may easily deteriorate the assembly stability of the lens during the assembly process, so that the quality and performance of the assembled lens are easily reduced. Therefore, the thickness of the spacer between the lenses can be effectively controlled by satisfying the requirements of 0 < CPi/CTi < 70, the stray light problem of the lens can be effectively improved, and the performance and quality of the lens are improved.
In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: (d1m+d2m)/CT 3 < 45, where D1m is the outer diameter of the image side surface of the first spacer, D2m is the outer diameter of the image side surface of the second spacer, and CT3 is the center thickness of the third lens on the optical axis. Satisfy (D1m+D2m)/CT 3 < 45, can make the external diameter of second lens and third lens in certain limit through the external diameter of the image side of reasonable setting first spacer and second spacer, and then can effectively reduce the shaping degree of difficulty of second lens and third lens, promote the quality of second lens and third lens, finally be favorable to promoting the performance of camera lens.
In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: 0< EP12/T23+EP23/T34 < 45, wherein EP12 is a separation distance in a direction along the optical axis of the image side surface of the first spacer to the object side surface of the second spacer, EP23 is a separation distance in a direction along the optical axis of the image side surface of the second spacer to the object side surface of the third spacer, T23 is an air separation of the second lens and the third lens on the optical axis, and T34 is an air separation of the third lens and the fourth lens on the optical axis. Satisfies 0< EP12/T23+EP23/T34 < 45, is favorable for reasonably distributing the edge distances and the air gaps of the second lens, the third lens and the fourth lens, ensures that the second spacing element and the third spacing element for stacking and supporting have better processability, improves the lens assembly precision and improves the optical imaging lens manufacturing process.
In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: 0 < L/(ΣCT- ΣCP). Times.FNO < 12, wherein L is the distance on the optical axis from the object side end of the lens barrel to the image side end of the lens barrel, ΣCP is the sum of the maximum thicknesses of the first spacer, the second spacer and the third spacer, ΣCT is the sum of the center thicknesses on the optical axis of all lenses of the first lens to the fourth lens, FNO is the aperture value of the optical imaging lens. It will be appreciated that the spacers may act to receive each lens throughout the lens, and may also act to block unwanted light. When the spacer thickness is too high, the thickness of the optical area of the lens may be reduced and the force between the lenses may be affected, which may increase the difficulty of molding the lens and the instability of the lens; when the thickness of the spacer is too low, the optical area of a part of the lens may be too thick, so that the uniformity of the whole lens is poor, and the molding difficulty of the lens is easily improved. Therefore, the application satisfies 0 < L/(ΣCT- ΣCP) x FNO < 12, can reasonably control the thickness of the spacer, reduce the molding difficulty of the lens and the instability in the assembly process, and achieve the purpose of improving the quality of the lens.
In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: -30 < (f3×f)/(d3m× d3m) <0, where f is the total effective focal length of the optical imaging lens, f3 is the effective focal length of the third lens, D3m is the outer diameter of the image side of the third spacer, and D3m is the inner diameter of the image side of the third spacer. In the application, the third lens can disperse the light converged by the first lens and the second lens according to the design condition so as to increase the imaging range on the imaging surface, increase the number of the light-sensitive elements and improve the imaging quality. However, if the light incident on the third lens is too much, part of the stray light and unwanted light of a part of the fringe field of view may pass through the third lens, which may adversely degrade the imaging quality. Based on the above, the application can reasonably control the outer diameter of the third lens and the light flux of the third lens by setting-30 < (f3×f)/(D3 m×d3m) <0 so as to improve the quality of the third lens and the imaging effect of the lens and finally improve the quality of the lens.
In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: (d2s+d2m)/(d0s—d0m) < 30, wherein D2s is the outer diameter of the object side surface of the second spacer, D2m is the inner diameter of the image side surface of the second spacer, D0m is the inner diameter of the image side end of the lens barrel, and D0s is the outer diameter of the object side end of the lens barrel. In the application, the outer diameter of the spacer can indirectly influence the outer diameter of the lens, the inner diameter of the spacer can influence the quantity of light passing through the lens, and the combination of the inner diameter and the outer diameter of the spacer can influence the assembly stability of the lens. Therefore, by setting (D2s+d2m)/(D0 s-D0 m) < 30, the application can reduce the molding difficulty of the lens, improve the imaging capability and the assembly stability of the lens, and further improve the quality of the lens.
In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: 0 < (d3s+ct4)/(CP 3+cp 2) < 120, wherein CP2 is the maximum thickness of the second spacer, CP3 is the maximum thickness of the third spacer, D3s is the outer diameter of the object side surface of the third spacer, and CT4 is the center thickness of the fourth lens on the optical axis. Satisfies 0 < (D3s+CT4)/(CP3+CP2) < 120, not only can the outer diameter size of the fourth lens be controlled to reduce the molding difficulty of the fourth lens, but also the thickness of the spacer can be controlled to improve the assembly stability of the fourth lens in the assembly process. The reasonable molding difficulty can not only effectively control the manufacturing cost of the lens, but also improve the quality of the lens. In addition, good assembly stability can lead to higher assembly yields and performance consistency. The arrangement of the application can ensure lower cost and is beneficial to improving the quality of the lens.
In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: f3 < 0mm, where f3 is the effective focal length of the third lens. Satisfy f3 < 0mm, can make the third lens diverge the light after gathering through first lens and second lens, make the light reach the fixed area on the imaging surface of position great to be favorable to more photosensitive elements to receive the irradiation of light, improve the imaging definition.
In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: f1 < 0mm and R1/R2 > 0, where f1 is the effective focal length of the first lens, R1 is the radius of curvature of the object-side surface of the first lens, and R2 is the radius of curvature of the image-side surface of the first lens. Satisfying f1 < 0mm and R1/R2 > 0, is favorable for making the first lens have negative focal power, and the object side surface is convex, and the image side surface is concave. In the wide-angle lens, the focal power and the surface shape of the first lens are favorable for converging light rays on the object side surface of the first lens, and the image side surface further converges the light rays so as to improve the performance and parameters of the lens. Meanwhile, the first lens has a converging effect on light rays, and the spacer is also beneficial to shielding the light rays reflected to the optical area of the first lens, so that the stray light phenomenon of the wide-angle lens is improved.
In an exemplary embodiment, the optical imaging lens according to the present application further includes a diaphragm located between the first lens and the second lens. Illustratively, the optical imaging lens further includes a filter for correcting color deviation and/or a protective glass for protecting the photosensitive element located on the imaging surface. The application provides an optical imaging lens with the characteristics of wide angle, miniaturization, high yield, good assembly stability, high imaging quality and the like. The optical imaging lens according to the above embodiment of the present application may employ a plurality of lenses, for example, the above four lenses. Through reasonable distribution of focal power, surface type, material, center thickness and axial spacing among the lenses, incident light can be effectively converged, the total optical length of the imaging lens is reduced, and the processability of the imaging lens is improved, so that the optical imaging lens is more beneficial to production and processing.
In an embodiment of the present application, at least one of the mirrors of each lens is an aspherical mirror, i.e., at least one of the object side surface of the first lens to the image side surface of the fourth lens is an aspherical mirror. The aspherical lens is characterized in that: the curvature varies continuously from the center of the lens to the periphery of the lens. Unlike a spherical lens having a constant curvature from the center of the lens to the periphery of the lens, an aspherical lens has a better radius of curvature characteristic, and has advantages of improving distortion aberration and improving astigmatic aberration. By adopting the aspherical lens, aberration occurring at the time of imaging can be eliminated as much as possible, thereby improving imaging quality. Optionally, at least one of an object side surface and an image side surface of each of the first lens, the second lens, the third lens, and the fourth lens is an aspherical mirror surface. Optionally, the object side surface and the image side surface of each of the first lens, the second lens, the third lens and the fourth lens are aspherical mirror surfaces.
However, it will be appreciated by those skilled in the art that the number of lenses making up the optical imaging lens can be varied to achieve the various results and advantages described in this specification without departing from the technical solution claimed in the present application. For example, although four lenses are described as an example in the embodiment, the optical imaging lens is not limited to include four lenses. The optical imaging lens may also include other numbers of lenses, if desired. At least one spacer, such as a spacer sheet, may be included between any two adjacent lenses.
Specific examples of the optical imaging lens applicable to the above-described embodiments are further described below with reference to the accompanying drawings.
Example 1
An optical imaging lens according to embodiment 1 of the present application is described below with reference to fig. 1A to 2D. Fig. 1A to 1C are schematic diagrams showing the structures of a lens barrel, a lens group, and respective spacers in three embodiments in the optical imaging lens of example 1, respectively.
As shown in fig. 1A to 1C, the optical imaging lens sequentially includes, from an object side to an image side: a first lens E1, a stop STO (not shown), a second lens E2, a third lens E3, a fourth lens E4, a filter (not shown), and an imaging plane (not shown).
The first lens element E1 has negative refractive power, wherein an object-side surface S1 thereof is convex, and an image-side surface S2 thereof is concave. The second lens element E2 has positive refractive power, wherein an object-side surface S3 thereof is convex, and an image-side surface S4 thereof is concave. The third lens element E3 has negative refractive power, wherein an object-side surface S5 thereof is convex, and an image-side surface S6 thereof is concave. The fourth lens element E4 has positive refractive power, wherein an object-side surface S7 thereof is convex, and an image-side surface S8 thereof is convex. The filter has an object side surface S9 and an image side surface S10. Light from the object sequentially passes through the respective surfaces S1 to S10 and is finally imaged on the imaging plane.
Table 1 shows the basic parameter table of the optical imaging lens of embodiment 1, in which the units of radius of curvature, thickness/distance, and focal length are all millimeters (mm).
TABLE 1
As shown in fig. 1A to 1C, the optical imaging lens may include a barrel accommodating the first lens to the fourth lens and three spacers respectively located between the first lens to the fourth lens. The three spacers are a first spacer P1, a second spacer P2, and a third spacer P3, respectively.
Table 2 shows basic parameter tables of the lens barrel and each spacer in three embodiments in the optical imaging lens of example 1, wherein each parameter in table 2 has a unit of millimeter (mm).
| Structural parameters/embodiments | Embodiment 1 | Embodiment 2 | Embodiment 3 |
| d1s | 1.02 | 1.02 | 1.02 |
| D1s | 3.174 | 2.109 | 2.109 |
| D1m | 3.174 | 2.109 | 2.109 |
| d2s | 1.486 | 1.002 | 1.002 |
| d2m | 1.233 | 1.002 | 1.002 |
| D2s | 3.014 | 2.109 | 3.374 |
| D2m | 3.274 | 2.109 | 3.374 |
| d3s | 1.896 | 1.896 | 1.896 |
| d3m | 2.937 | 2.937 | 2.937 |
| D3s | 2.954 | 2.954 | 2.954 |
| D3m | 3.474 | 3.474 | 3.474 |
| d0m | 3.8559 | 3.8559 | 3.856 |
| D0s | 4.1075 | 4.1075 | 4.107 |
| EP01 | 0.869 | 0.869 | 0.869 |
| CP1 | 0.022 | 0.022 | 0.022 |
| EP12 | 0.49 | 0.6005 | 0.6 |
| CP2 | 0.299 | 0.018 | 0.018 |
| EP23 | 0.425 | 0.5955 | 0.594 |
| CP3 | 0.463 | 0.463 | 0.463 |
| L | 3.2895 | 3.2895 | 3.29 |
TABLE 2
It should be understood that in the present example, the structures and parameters of the lens barrel and each spacer in the three embodiments are merely exemplified, and specific structures and actual parameters of the lens barrel and each spacer are not explicitly defined. The specific structure and actual parameters of the lens barrel and the respective spacers may be set in any suitable manner in actual production.
In this example, the total effective focal length f of the optical imaging lens is 0.81mm, and the aperture value FNO of the optical imaging lens is 2.30.
In embodiment 1, the object side surface and the image side surface of any one of the first lens E1 to the fourth lens E4 are aspherical, and the surface profile x of each aspherical lens can be defined by, but not limited to, the following aspherical formula:
Wherein x is the distance vector height from the vertex of the aspheric surface when the aspheric surface is at the position with the height h along the optical axis direction; c is the paraxial curvature of the aspheric surface, c=1/R (i.e., paraxial curvature c is the inverse of radius of curvature R in table 1 above); k is a conic coefficient; ai is the correction coefficient of the aspherical i-th order. The higher order coefficients A4、A6、A8、A10、A12、A14、A16、A18、A20、A22 and A 24 that can be used for each of the aspherical mirror faces S1-S8 in example 1 are given in tables 3-1 and 3-2 below.
| Face number | A4 | A6 | A8 | A10 | A12 | A14 |
| S1 | 3.8178E-01 | -1.2391E-01 | 3.3547E-02 | -6.7638E-03 | 1.3509E-03 | -4.3425E-04 |
| S2 | 1.7571E-01 | -6.4720E-02 | 5.4972E-03 | 2.1402E-03 | -4.7510E-04 | 1.0948E-05 |
| S3 | -8.9329E-03 | -3.9380E-04 | -9.0093E-05 | -2.8069E-05 | 8.2063E-06 | 1.1138E-07 |
| S4 | -1.8928E-01 | 9.0524E-03 | -3.1980E-05 | -4.2050E-04 | -3.0885E-04 | 1.3857E-04 |
| S5 | -1.7204E-01 | -8.8180E-03 | 5.9093E-03 | -3.2673E-03 | 7.1454E-04 | -3.1178E-04 |
| S6 | 3.8418E-02 | -4.1961E-02 | 3.2667E-02 | -1.6402E-02 | 7.9366E-03 | -3.6894E-03 |
| S7 | 1.5798E-01 | -1.1066E-01 | 4.2538E-02 | -2.2098E-02 | 1.1128E-02 | -6.7452E-03 |
| S8 | 6.1879E-01 | -1.3236E-01 | 8.2634E-03 | 4.8579E-03 | -8.4313E-03 | 3.2873E-03 |
TABLE 3-1
| Face number | A16 | A18 | A20 | A22 | A24 |
| S1 | 2.2143E-04 | -6.9631E-05 | -7.0321E-07 | 0.0000E+00 | 0.0000E+00 |
| S2 | 7.5428E-05 | 3.2033E-05 | -2.1072E-05 | 0.0000E+00 | 0.0000E+00 |
| S3 | 9.1490E-06 | -5.7846E-06 | 1.4698E-06 | 0.0000E+00 | 0.0000E+00 |
| S4 | -1.1217E-04 | 1.9842E-04 | -9.1966E-05 | 4.6979E-05 | -2.7791E-05 |
| S5 | -1.2754E-04 | 1.8586E-04 | -3.9324E-05 | 3.4666E-05 | 7.8266E-08 |
| S6 | 1.4801E-03 | -4.5856E-04 | 1.1821E-04 | 5.7367E-06 | -7.6185E-06 |
| S7 | 3.4742E-03 | -1.7376E-03 | 8.6826E-04 | -2.8863E-04 | 1.3543E-04 |
| S8 | -1.5150E-03 | 2.6040E-04 | 7.3093E-05 | -6.7414E-05 | 6.8407E-05 |
TABLE 3-2
Fig. 2A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 1, which indicates the deviation of the converging focus after light rays of different wavelengths pass through the lens. Fig. 2B shows an astigmatism curve of the optical imaging lens of embodiment 1, which represents meridional image plane curvature and sagittal image plane curvature. Fig. 2C shows a distortion curve of the optical imaging lens of embodiment 1, which represents distortion magnitude values corresponding to different angles of view. Fig. 2D shows a magnification chromatic aberration curve of the optical imaging lens of embodiment 1, which represents the deviation of different image heights on the imaging plane after light passes through the lens. As can be seen from fig. 2A to 2D, the optical imaging lens provided in embodiment 1 can achieve good imaging quality.
Example 2
An optical imaging lens according to embodiment 2 of the present application is described below with reference to fig. 3A to 4D. In this embodiment and the following embodiments, descriptions of portions similar to embodiment 1 will be omitted for brevity. Fig. 3A to 3C are schematic diagrams showing the structures of a lens barrel, a lens group, and respective spacers in three embodiments in the optical imaging lens of example 2, respectively.
As shown in fig. 3A to 3C, the optical imaging lens sequentially includes, from an object side to an image side: a first lens E1, a stop STO (not shown), a second lens E2, a third lens E3, a fourth lens E4, a filter (not shown), and an imaging plane (not shown).
The first lens element E1 has negative refractive power, wherein an object-side surface S1 thereof is convex, and an image-side surface S2 thereof is concave. The second lens element E2 has positive refractive power, wherein an object-side surface S3 thereof is convex, and an image-side surface S4 thereof is convex. The third lens element E3 has negative refractive power, wherein an object-side surface S5 thereof is concave, and an image-side surface S6 thereof is concave. The fourth lens element E4 has positive refractive power, wherein an object-side surface S7 thereof is convex, and an image-side surface S8 thereof is convex. The filter has an object side surface S9 and an image side surface S10. Light from the object sequentially passes through the respective surfaces S1 to S10 and is finally imaged on the imaging plane.
As shown in fig. 3A to 3C, the optical imaging lens may include a barrel accommodating the first lens to the fourth lens and three spacers respectively located between the first lens to the fourth lens. The three spacers are a first spacer P1, a second spacer P2, and a third spacer P3, respectively.
It should be understood that in the present example, the structures and parameters of the lens barrel and each spacer in the three embodiments are merely exemplified, and specific structures and actual parameters of the lens barrel and each spacer are not explicitly defined. The specific structure and actual parameters of the lens barrel and the respective spacers may be set in any suitable manner in actual production.
In this example, the total effective focal length f of the optical imaging lens is 0.83mm, and the aperture value FNO of the optical imaging lens is 2.27.
Table 4 shows the basic parameter table of the optical imaging lens of embodiment 2, in which the units of radius of curvature, thickness/distance, and focal length are all millimeters (mm). Table 5 shows basic parameter tables of the lens barrel and each spacer in three embodiments in the optical imaging lens of example 2, wherein each parameter in table 5 has a unit of millimeter (mm). Tables 6-1 and 6-2 show the higher order coefficients that can be used for each of the aspherical mirror surfaces in example 2, wherein each of the aspherical surface profiles can be defined by the formula (1) given in example 1 above.
TABLE 4 Table 4
| Structural parameters/embodiments | Embodiment 1 | Embodiment 2 | Embodiment 3 |
| d1s | 1.128 | 1.128 | 1.128 |
| D1s | 3.174 | 3.174 | 3.174 |
| D1m | 3.174 | 3.174 | 3.174 |
| d2s | 1.127 | 1.127 | 1.127 |
| d2m | 1.127 | 1.127 | 1.127 |
| D2s | 3.374 | 3.374 | 2.375 |
| D2m | 3.374 | 3.374 | 2.375 |
| d3s | 1.561 | 1.561 | 1.561 |
| d3m | 1.561 | 1.561 | 1.561 |
| D3s | 3.474 | 3.474 | 3.474 |
| D3m | 3.474 | 3.474 | 3.474 |
| d0m | 3.6368 | 3.6368 | 3.6368 |
| D0s | 4.1075 | 4.1075 | 4.107 |
| EP01 | 0.846 | 0.846 | 0.846 |
| CP1 | 0.022 | 0.022 | 0.022 |
| EP12 | 1.07 | 1.07 | 1.07 |
| CP2 | 0.022 | 0.022 | 0.022 |
| EP23 | 0.496 | 0.496 | 0.496 |
| CP3 | 0.022 | 0.022 | 0.022 |
| L | 2.9575 | 2.9575 | 2.957 |
TABLE 5
TABLE 6-1
| Face number | A16 | A18 | A20 | A22 | A24 |
| S1 | 7.7799E-05 | -5.2699E-06 | -2.9649E-06 | 0.0000E+00 | 0.0000E+00 |
| S2 | -2.3126E-04 | 7.3440E-05 | -1.6686E-06 | 0.0000E+00 | 0.0000E+00 |
| S3 | 7.1265E-06 | -4.6474E-06 | 6.2313E-06 | 0.0000E+00 | 0.0000E+00 |
| S4 | 1.9746E-05 | -4.8684E-06 | 2.4623E-06 | 9.5100E-07 | 1.0847E-06 |
| S5 | -4.6513E-05 | 1.0334E-04 | -6.9885E-05 | 4.5094E-05 | -1.3544E-05 |
| S6 | 6.9153E-04 | -1.5137E-04 | -1.2098E-05 | 1.8633E-05 | -3.1192E-06 |
| S7 | 2.3302E-03 | -1.0124E-03 | 3.7759E-04 | -1.0011E-04 | 1.1964E-05 |
| S8 | 1.0231E-04 | 1.6776E-04 | -1.6404E-04 | 7.0240E-05 | -1.9240E-05 |
TABLE 6-2
Fig. 4A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 2, which indicates the deviation of the converging focus after light rays of different wavelengths pass through the lens. Fig. 4B shows an astigmatism curve of the optical imaging lens of embodiment 2, which represents meridional image plane curvature and sagittal image plane curvature. Fig. 4C shows a distortion curve of the optical imaging lens of embodiment 2, which represents distortion magnitude values corresponding to different angles of view. Fig. 4D shows a magnification chromatic aberration curve of the optical imaging lens of embodiment 2, which represents the deviation of different image heights on the imaging plane after light passes through the lens. As can be seen from fig. 4A to 4D, the optical imaging lens provided in embodiment 2 can achieve good imaging quality.
Example 3
An optical imaging lens according to embodiment 3 of the present application is described below with reference to fig. 5A to 6D. Fig. 5A to 5C are schematic views showing the structures of a lens barrel, a lens group, and respective spacers in three embodiments in the optical imaging lens of example 3, respectively.
As shown in fig. 5A to 5C, the optical imaging lens sequentially includes, from an object side to an image side: a first lens E1, a stop STO (not shown), a second lens E2, a third lens E3, a fourth lens E4, a filter (not shown), and an imaging plane (not shown).
The first lens element E1 has negative refractive power, wherein an object-side surface S1 thereof is convex, and an image-side surface S2 thereof is concave. The second lens element E2 has positive refractive power, wherein an object-side surface S3 thereof is convex, and an image-side surface S4 thereof is convex. The third lens element E3 has negative refractive power, wherein an object-side surface S5 thereof is concave and an image-side surface S6 thereof is convex. The fourth lens element E4 has positive refractive power, wherein an object-side surface S7 thereof is concave and an image-side surface S8 thereof is convex. The filter has an object side surface S9 and an image side surface S10. Light from the object sequentially passes through the respective surfaces S1 to S10 and is finally imaged on the imaging plane.
As shown in fig. 5A to 5C, the optical imaging lens may include a barrel accommodating the first lens to the fourth lens and three spacers respectively located between the first lens to the fourth lens. The three spacers are a first spacer P1, a second spacer P2, and a third spacer P3, respectively.
It should be understood that in the present example, the structures and parameters of the lens barrel and each spacer in the three embodiments are merely exemplified, and specific structures and actual parameters of the lens barrel and each spacer are not explicitly defined. The specific structure and actual parameters of the lens barrel and the respective spacers may be set in any suitable manner in actual production.
In this example, the total effective focal length f of the optical imaging lens is 0.82mm, and the aperture value FNO of the optical imaging lens is 2.27.
Table 7 shows a basic parameter table of the optical imaging lens of embodiment 3, in which the units of radius of curvature, thickness/distance, and focal length are all millimeters (mm). Table 8 shows basic parameter tables of the lens barrel and each spacer in three embodiments in the optical imaging lens of example 3, wherein each parameter in table 8 has a unit of millimeter (mm). Tables 9-1 and 9-2 show the higher order coefficients that can be used for each of the aspherical mirror surfaces in example 3, wherein each of the aspherical surface profiles can be defined by the formula (1) given in example 1 above.
TABLE 7
TABLE 8
| Face number | A4 | A6 | A8 | A10 | A12 | A14 |
| S1 | 3.8289E-01 | -1.1243E-01 | 1.8187E-02 | -5.3060E-03 | 2.5427E-03 | -8.2079E-04 |
| S2 | 1.5852E-01 | -6.1458E-02 | -1.0966E-03 | 7.1214E-04 | 9.2509E-04 | -1.0562E-04 |
| S3 | -1.0694E-02 | -1.3275E-03 | -2.0551E-04 | -8.3985E-05 | 2.9851E-06 | -1.2107E-05 |
| S4 | -1.2404E-01 | -3.9391E-03 | -9.6292E-04 | -7.5216E-04 | -7.9203E-05 | -3.6979E-05 |
| S5 | -1.4827E-01 | -5.2118E-03 | 6.2521E-03 | -6.3510E-04 | -1.8824E-05 | 5.8522E-05 |
| S6 | 4.9418E-02 | -3.7823E-02 | 2.5085E-02 | -1.0391E-02 | 4.4171E-03 | -1.9032E-03 |
| S7 | 1.7619E-01 | -7.9761E-02 | 3.4463E-02 | -1.7211E-02 | 8.8516E-03 | -4.6569E-03 |
| S8 | 3.9241E-01 | -3.7089E-02 | -6.0475E-03 | 1.8841E-03 | -6.3742E-05 | -8.3982E-04 |
TABLE 9-1
| Face number | A16 | A18 | A20 | A22 | A24 |
| S1 | 1.0727E-04 | -1.0741E-05 | -2.1884E-06 | 0.0000E+00 | 0.0000E+00 |
| S2 | -2.4282E-04 | 9.7274E-05 | -1.0700E-05 | 0.0000E+00 | 0.0000E+00 |
| S3 | 7.8781E-06 | -3.7252E-06 | 6.3112E-06 | 0.0000E+00 | 0.0000E+00 |
| S4 | -9.2308E-06 | 1.1124E-05 | -4.6722E-06 | 6.1270E-06 | 6.3045E-07 |
| S5 | -9.6463E-05 | 1.2713E-04 | -7.8665E-05 | 5.1758E-05 | -1.7257E-05 |
| S6 | 6.8453E-04 | -1.5657E-04 | -1.5474E-05 | 2.8630E-05 | -5.6992E-06 |
| S7 | 2.2977E-03 | -1.0192E-03 | 3.9486E-04 | -1.1173E-04 | 1.4384E-05 |
| S8 | 1.9583E-04 | 1.8861E-04 | -2.0219E-04 | 8.4658E-05 | -3.0073E-05 |
TABLE 9-2
Fig. 6A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 3, which indicates a convergent focus deviation of light rays of different wavelengths after passing through the lens. Fig. 6B shows an astigmatism curve of the optical imaging lens of embodiment 3, which represents meridional image plane curvature and sagittal image plane curvature. Fig. 6C shows a distortion curve of the optical imaging lens of embodiment 3, which represents distortion magnitude values corresponding to different angles of view. Fig. 6D shows a magnification chromatic aberration curve of the optical imaging lens of embodiment 3, which represents the deviation of different image heights on the imaging plane after light passes through the lens. As can be seen from fig. 6A to 6D, the optical imaging lens provided in embodiment 3 can achieve good imaging quality.
In summary, examples 1 to 3 satisfy the relationships shown in tables 10-1, 10-2 and 10-3, respectively.
TABLE 10-1
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TABLE 10-2
TABLE 10-3
The application also provides an imaging device, wherein the electronic photosensitive element can be a photosensitive coupling element (CCD) or a complementary metal oxide semiconductor element (CMOS). The imaging device may be a stand alone imaging device such as a digital camera or an imaging module integrated on a mobile electronic device such as a cell phone. The imaging device is equipped with the optical imaging lens described above.
The above description is only illustrative of the preferred embodiments of the present application and of the principles of the technology employed. It will be appreciated by persons skilled in the art that the scope of the application referred to in the present application is not limited to the specific combinations of the technical features described above, but also covers other technical features formed by any combination of the technical features described above or their equivalents without departing from the inventive concept. Such as the above-mentioned features and the technical features disclosed in the present application (but not limited to) having similar functions are replaced with each other.
Claims (10)
1. Optical imaging lens, its characterized in that includes:
A lens group including, in order from an object side to an image side along an optical axis, a first lens, a second lens, a third lens, and a fourth lens having optical powers, wherein positive and negative properties of the optical powers of the first lens and the second lens are different, positive and negative properties of the optical powers of the third lens and the fourth lens are different, and at least one of the first lens to the fourth lens has a meniscus shape;
A plurality of spacers, comprising:
a first spacer located on an image side of the first lens and in contact with an image side portion of the first lens;
a second spacer located on an image side of the second lens and in contact with an image side portion of the second lens; and
A third spacer located on an image side of the third lens and in contact with an image side portion of the third lens;
A lens barrel for accommodating the lens group and the plurality of spacers;
The optical imaging lens satisfies the following conditions: 0 < (d2s×d3s)/(CT 2×t23) < 70, wherein d2s is an inner diameter of an object side surface of the second spacer, d3s is an inner diameter of an object side surface of the third spacer, T23 is an air gap of the second lens and the third lens on the optical axis, and CT2 is a center thickness of the second lens on the optical axis.
2. The optical imaging lens of claim 1, wherein the optical imaging lens satisfies: -80 < R5/D1s-R6/D1s < 60, wherein R5 is the radius of curvature of the object-side surface of the third lens, R6 is the radius of curvature of the image-side surface of the third lens, D1s is the inner diameter of the object-side surface of the first spacer, and D1s is the outer diameter of the object-side surface of the first spacer.
3. The optical imaging lens of claim 1, wherein the optical imaging lens satisfies: 0< (CP 1/CP 2) × (CT 2/CT 1) < 60, wherein CP1 is the maximum thickness of the first spacer, CP2 is the maximum thickness of the second spacer, and CT1 is the center thickness of the first lens on the optical axis.
4. The optical imaging lens of claim 1, wherein the optical imaging lens satisfies: 0mm -1＜(EP01+EP12)/(T12×T23)＜40.0mm-1, wherein EP01 is a separation distance of an object side end of the lens barrel to an object side surface of the first spacer in a direction along the optical axis, EP12 is a separation distance of an image side surface of the first spacer to an object side surface of the second spacer in a direction along the optical axis, and T12 is an air separation of the first lens and the second lens on the optical axis.
5. The optical imaging lens of claim 1, wherein the optical imaging lens satisfies: 0< CPi/CTi < 70, wherein CPi is the maximum thickness of the ith spacer and CTi is the central thickness of the ith lens on the optical axis, i is selected from 1, 2 and 3.
6. The optical imaging lens of claim 1, wherein the optical imaging lens satisfies: (d1m+d2m)/CT 3 < 45, wherein D1m is an outer diameter of an image side surface of the first spacer, D2m is an outer diameter of an image side surface of the second spacer, and CT3 is a center thickness of the third lens on the optical axis.
7. The optical imaging lens of claim 1, wherein the optical imaging lens satisfies: 0 < EP12/T23+EP23/T34 < 45, wherein EP12 is a separation distance of an image side surface of the first spacer to an object side surface of the second spacer in a direction along the optical axis, EP23 is a separation distance of an image side surface of the second spacer to an object side surface of the third spacer in a direction along the optical axis, and T34 is an air separation distance of the third lens and the fourth lens on the optical axis.
8. The optical imaging lens of claim 1, wherein the optical imaging lens satisfies: 0 < L/(ΣCT- ΣCP). Times.FNO < 12, wherein L is the distance on the optical axis from the object side end of the lens barrel to the image side end of the lens barrel, ΣCP is the sum of the maximum thicknesses of the first spacer, the second spacer and the third spacer, ΣCT is the sum of the center thicknesses of all lenses of the first lens to the fourth lens on the optical axis, FNO is the aperture value of the optical imaging lens.
9. The optical imaging lens of claim 1, wherein the optical imaging lens satisfies: -30 < (f3×f)/(d3m× d3m) < 0, wherein f is the total effective focal length of the optical imaging lens, f3 is the effective focal length of the third lens, D3m is the outer diameter of the image side surface of the third spacer, and D3m is the inner diameter of the image side surface of the third spacer.
10. The optical imaging lens of claim 1, wherein the optical imaging lens satisfies: (d2s+d2m)/(d0s—d0m) < 30, wherein D2s is the outer diameter of the object side surface of the second spacer, D2m is the inner diameter of the image side surface of the second spacer, D0m is the inner diameter of the image side end of the lens barrel, and D0s is the outer diameter of the object side end of the lens barrel.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211263478.4A CN117930459A (en) | 2022-10-14 | 2022-10-14 | Optical imaging lens |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211263478.4A CN117930459A (en) | 2022-10-14 | 2022-10-14 | Optical imaging lens |
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| CN117930459A true CN117930459A (en) | 2024-04-26 |
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| CN202211263478.4A Pending CN117930459A (en) | 2022-10-14 | 2022-10-14 | Optical imaging lens |
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| CN (1) | CN117930459A (en) |
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