CN117008291A - Optical imaging lens - Google Patents
Optical imaging lens Download PDFInfo
- Publication number
- CN117008291A CN117008291A CN202210469167.7A CN202210469167A CN117008291A CN 117008291 A CN117008291 A CN 117008291A CN 202210469167 A CN202210469167 A CN 202210469167A CN 117008291 A CN117008291 A CN 117008291A
- Authority
- CN
- China
- Prior art keywords
- lens
- object side
- optical axis
- optical imaging
- barrel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000012634 optical imaging Methods 0.000 title claims abstract description 128
- 230000003287 optical effect Effects 0.000 claims abstract description 103
- 125000006850 spacer group Chemical group 0.000 claims description 70
- 238000003384 imaging method Methods 0.000 description 51
- 230000004075 alteration Effects 0.000 description 16
- 201000009310 astigmatism Diseases 0.000 description 12
- 238000010586 diagram Methods 0.000 description 10
- 230000009286 beneficial effect Effects 0.000 description 3
- 230000014509 gene expression Effects 0.000 description 3
- 238000009826 distribution Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- WTFUTSCZYYCBAY-SXBRIOAWSA-N 6-[(E)-C-[[4-[2-(2,3-dihydro-1H-inden-2-ylamino)pyrimidin-5-yl]piperazin-1-yl]methyl]-N-hydroxycarbonimidoyl]-3H-1,3-benzoxazol-2-one Chemical compound C1C(CC2=CC=CC=C12)NC1=NC=C(C=N1)N1CCN(CC1)C/C(=N/O)/C1=CC2=C(NC(O2)=O)C=C1 WTFUTSCZYYCBAY-SXBRIOAWSA-N 0.000 description 1
- MKYBYDHXWVHEJW-UHFFFAOYSA-N N-[1-oxo-1-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)propan-2-yl]-2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidine-5-carboxamide Chemical compound O=C(C(C)NC(=O)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F)N1CC2=C(CC1)NN=N2 MKYBYDHXWVHEJW-UHFFFAOYSA-N 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
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
- G02B13/0015—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design
- G02B13/002—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface
- G02B13/0045—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface having five or more lenses
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/06—Panoramic objectives; So-called "sky lenses" including panoramic objectives having reflecting surfaces
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/18—Optical objectives specially designed for the purposes specified below with lenses having one or more non-spherical faces, e.g. for reducing geometrical aberration
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Lenses (AREA)
Abstract
The application discloses an optical imaging lens, which comprises a lens barrel and a lens group assembled in the lens barrel, wherein the lens group sequentially comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens from an object side to an image side along an optical axis, and the first lens to the sixth lens are all propped against the inner wall of the lens barrel; the first lens and the fourth lens both have negative focal power; the object side surface and the image side surface of the third lens are convex; a first spacing element is disposed between the first lens and the second lens; a second spacing element is arranged between the second lens and the third lens; and 2.5< d1s/d2s+T12/CT1<5.5, wherein d1s is the inner diameter of the first spacing element near the object side, d2s is the inner diameter of the second spacing element near the object side, T12 is the air spacing of the first lens and the second lens on the optical axis, and CT1 is the center thickness of the first lens on the optical axis.
Description
Technical Field
The application relates to the field of optical elements, in particular to an optical imaging lens comprising six lenses.
Background
In recent years, with the rapid development of technology, mobile portable electronic devices have been rapidly popularized, for example, smart phones and the like, and the trend of the electronic devices such as smart phones and the like towards high performance and high quality has become more and more obvious, which forces users to have higher requirements on optical imaging lenses applied to the electronic devices such as smart phones and the like. For the optical imaging lens on the smart phone, the wide-angle lens with a large field angle is more favored by users, however, stray light with multiple angles is easy to appear on the wide-angle lens, the wide-angle lens has large universal front lens and convex overall shape, and due to the miniaturization requirement, the non-effective lens part of the front lens has small duty ratio, and the requirement on the assembly stability is high when the lens barrel is designed.
Therefore, how to provide an optical imaging lens to reduce stray light and improve optical stability of the optical imaging lens to meet the imaging quality requirement of the imaging lens is a problem to be solved in the current optical imaging lens products.
Disclosure of Invention
The present application provides an optical imaging lens that at least solves or partially solves at least one of the above-mentioned drawbacks of the prior art.
An aspect of the present application provides an optical imaging lens including a barrel and a lens group fitted in the barrel, the 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, a fourth lens, a fifth lens, and a sixth lens, the first lens to the sixth lens each being abutted against an inner wall of the barrel; the first lens and the fourth lens both have negative focal power; the object side surface and the image side surface of the third lens are convex; a first spacing element is disposed between the first lens and the second lens; a second spacing element is arranged between the second lens and the third lens; and 2.5< d1s/d2s+T12/CT1<5.5, wherein d1s is the inner diameter of the first spacing element near the object side, d2s is the inner diameter of the second spacing element near the object side, T12 is the air spacing of the first lens and the second lens on the optical axis, and CT1 is the center thickness of the first lens on the optical axis.
According to an exemplary embodiment of the present application, an outer diameter D0s of an end of the lens barrel near the object side, an outer diameter D0M of an end of the lens barrel near the image side, a maximum length L of the lens barrel, and a total effective focal length f of the lens group satisfy: 2mm of -1 <(D0s+D0M)/(L×f)<3mm -1 。
According to an exemplary embodiment of the present application, a third spacer element is disposed between the third lens and the fourth lens, an inner diameter D3s of the third spacer element near the object side, an outer diameter D3s of the third spacer element near the object side, a center thickness CT3 of the third lens on the optical axis, and a radius of curvature R5 of the object side of the third lens satisfy: 0.2mm -1 <(D3s-d3s)/|CT3×R5|<3mm -1 。
According to an exemplary embodiment of the present application, a fourth spacing element is disposed between the fourth lens and the fifth lens, and a distance EP34 between the third spacing element and the fourth spacing element and a center thickness CT4 of the fourth lens on the optical axis satisfy: 1.7< EP34/CT4<2.3.
According to an exemplary embodiment of the present application, the center thickness CT3 of the third lens on the optical axis, the radius of curvature R6 of the image side surface of the third lens, the outer diameter D2s of the second spacer element near the object side, and the inner diameter D3s of the third spacer element near the object side satisfy: 0< |CT3/R6|× (D2 s/D3 s) <1.5.
According to an exemplary embodiment of the present application, a fifth spacer element and a sixth spacer element are disposed between the fifth lens and the sixth lens, and a radius of curvature R10 of an image side surface of the fifth lens, a center thickness CT6 of the sixth lens on an optical axis, an inner diameter d6m of the sixth spacer element near the image side, and a maximum effective radius DT61 of an object side surface of the sixth lens satisfy: 0< |R10/CT6| -d6m/DT61<0.8.
According to an exemplary embodiment of the present application, the air space T12 of the first lens and the second lens on the optical axis, the object side end surface of the lens barrel, and the distance EP01 of the first spacer element on the optical axis, the maximum effective radius DT21 of the object side surface of the second lens, and the inner diameter d1s of the first spacer element near the object side satisfy: 2< T12/EP01+d1s/DT21<5.5.
According to an exemplary embodiment of the present application, the minimum opening inner diameter ds of the lens barrel near the object side, the air space T12 of the first lens and the second lens on the optical axis, the outer diameter D0M of the end of the lens barrel near the image side, the distance TD of the object side of the first lens to the image side of the sixth lens on the optical axis, and the f-number fno of the optical imaging lens satisfy: 6< ds/T12+D0M/(TD×fno) <12.
According to an exemplary embodiment of the present application, the outer diameter D1s of the first spacing element near the object side, the inner diameter D2s of the second spacing element near the object side, the center thickness CT1 of the first lens on the optical axis, the center thickness CT2 of the second lens on the optical axis, and the air spacing T12 of the first lens and the second lens on the optical axis satisfy: 1< D1 s/(CT1+T12+CT2) -d1s/d2s <3.5.
According to an exemplary embodiment of the present application, an outer diameter Dns of an nth spacing element of all the spacing elements near the object side and a center thickness CTn of an nth lens of all the lenses on the optical axis satisfy: 5< Dns/CTn <20, where n.ltoreq.3.
Another aspect of the present application provides an optical imaging lens including a barrel and a lens group fitted in the barrel, the 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, a fourth lens, a fifth lens, and a sixth lens with an air space between any adjacent two of the first to sixth lenses; a first spacing element is disposed between the first lens and the second lens; a second spacing element is arranged between the second lens and the third lens; a third spacing element is arranged between the third lens and the fourth lens; and 5< Dns/CTn <20, wherein Dns is the outer diameter of the nth spacing element of all spacing elements near the object side, and CTn is the central thickness of the nth lens of all lenses on the optical axis, and n is less than or equal to 3.
According to an exemplary embodiment of the present application, the first lens and the sixth lens have the same sign of optical power.
The optical imaging lens provided by the application adopts a plurality of lenses, such as the first lens to the sixth lens, because the angle of view of the ultra-wide angle lens is larger, the integral shape of the front lens is outwards convex towards the object side, therefore, through reasonably controlling the inner diameter of the first spacing element close to the object side, the inner diameter of the second spacing element close to the object side, the mutual relation between the air interval of the first lens and the second lens on the optical axis and the central thickness of the first lens on the optical axis, incident light rays can be converged from the first lens to the second lens, a larger allowance is reserved between the air interval of the first lens and the second lens on the optical axis, the assembly stability of the first lens and the second lens is facilitated to be improved, and the first spacing element and the second spacing element are attached to the edges of principal light rays in the incident light rays, so that the first spacing element and the second spacing element effectively shield stray light rays under the condition of not influencing the principal light rays, and the imaging quality of the optical imaging lens is improved.
Drawings
Other features, objects and advantages of the present application will become more apparent from the following detailed description of non-limiting embodiments, taken in conjunction with the accompanying drawings. In the drawings:
fig. 1 shows a schematic configuration diagram of an optical imaging lens according to embodiment 1 of the present application;
fig. 2A to 2B show an on-axis chromatic aberration curve and an astigmatism curve, respectively, of the optical imaging lens of embodiment 1;
fig. 3 is a schematic diagram showing the structure of an optical imaging lens according to embodiment 2 of the present application;
fig. 4A to 4B show an on-axis chromatic aberration curve and an astigmatism curve, respectively, of the optical imaging lens of embodiment 2;
fig. 5 shows a schematic structural view of an optical imaging lens according to embodiment 3 of the present application;
fig. 6A to 6B show an on-axis chromatic aberration curve and an astigmatism curve, respectively, of the optical imaging lens of embodiment 3;
fig. 7 shows a schematic configuration diagram of an optical imaging lens according to embodiment 4 of the present application;
fig. 8A to 8B show an on-axis chromatic aberration curve and an astigmatism curve, respectively, of the optical imaging lens of embodiment 4;
fig. 9 shows a schematic configuration diagram of an optical imaging lens according to embodiment 5 of the present application;
fig. 10A to 10B show an on-axis chromatic aberration curve and an astigmatism curve, respectively, of the optical imaging lens of embodiment 5;
Fig. 11 shows a schematic structural view of an optical imaging lens according to embodiment 6 of the present application;
fig. 12A to 12B show an on-axis chromatic aberration curve and an astigmatism curve, respectively, of the optical imaging lens of embodiment 6;
fig. 13 shows a schematic diagram of size definition 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 this specification, the expressions of first, second, third, fourth, fifth, sixth, etc. are used only 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 or a fourth lens or a fifth lens or a sixth lens 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.
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 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 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 includes a lens barrel and a lens group assembled in the lens barrel, and the lens group may include six lenses having optical power, i.e., a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens. The six lenses are sequentially arranged from the object side to the image side along the optical axis. The first lens to the sixth lens in the lens group are propped against the inner wall of the lens barrel, and the inner diameter of the lens barrel is increased from the object side to the image side. In the first lens to the sixth lens, any adjacent two lenses may have an air space therebetween.
In an exemplary embodiment, the first lens has a negative optical power; the second lens has positive optical power; the third lens has positive focal power; the fourth lens has negative focal power; the fifth lens has positive focal power; and the sixth lens has negative optical power. The focal power and the surface area of each lens in the optical system are reasonably matched, so that the low-order aberration of the optical system can be effectively balanced, and the tolerance sensitivity is reduced.
In an exemplary embodiment, the object side surface of the second lens may be convex.
In an exemplary embodiment, the object-side surface of the third lens may be convex, and the image-side surface may be convex.
In an exemplary embodiment, the image-side surface of the fourth lens may be convex, and the image-side surface may be concave.
In an exemplary embodiment, the object-side surface of the fifth lens element may be convex, and the image-side surface may be convex.
In an exemplary embodiment, the image side of the sixth lens may be convex and the image side may be concave.
In an exemplary embodiment, half of the maximum field angle Semi-FOV of the optical imaging lens satisfies: the Semi-FOV is more than or equal to 54 degrees. Since the optical imaging lens has a larger field angle, the first lens is configured to be convex towards the object side, and can be used for converging incident light after passing through the first lens; the second lens is relatively gentle, which is beneficial to molding of the second lens and smooth passing of incident light. The air interval T12 of the first lens and the second lens on the optical axis satisfies: t12 is more than or equal to 0.3mm, so that a larger allowance can be reserved between the first lens and the second lens on the air space on the optical axis, and the assembly stability of the first lens and the second lens can be improved.
In an exemplary embodiment, a first spacing element is disposed between the first lens and the second lens, and a second spacing element is disposed between the second lens and the third lens. The inner diameter d1s of the first spacing element near the object side and the inner diameter d2s of the second spacing element near the object side satisfy: 1< d1s/d2s <1.8. By reasonably controlling the interrelation between the inner diameter of the first spacing element close to the object side and the inner diameter of the second spacing element close to the object side, the first spacing element and the second spacing element can be attached to the edge of the chief ray in the incident ray, and the first spacing element and the second spacing element can effectively shield the generated stray light under the condition of not influencing the chief ray.
In the exemplary embodiment, the inner diameter d1s of the first spacing element near the object side, the inner diameter d2s of the second spacing element near the object side, the air spacing T12 of the first lens and the second lens on the optical axis, and the center thickness CT1 of the first lens on the optical axis satisfy: 2.5< d1s/d2s+T12/CT1<5.5. In an example, 2.9< d1s/d2s+T12/CT1<5.2. The inner diameter of the first spacing element close to the object side, the inner diameter of the second spacing element close to the object side, the mutual relation between the air spacing of the first lens and the second lens on the optical axis and the central thickness of the first lens on the optical axis are reasonably controlled, incident light rays can be enabled to be converged from the first lens to the second lens, a large allowance is reserved between the air spacing of the first lens and the second lens on the optical axis, the assembly stability of the first lens and the second lens is improved, and the first spacing element and the second spacing element are attached to the edges of principal rays in the incident light rays, so that the first spacing element and the second spacing element can effectively shield generated stray light under the condition that the principal rays are not influenced.
In the exemplary embodiment, the outer diameter D0s of the end of the lens barrel near the object side, the outer diameter D0M of the end of the lens barrel near the image side, the maximum length L of the lens barrel, and the total effective focal length f of the lens group satisfy: 2mm of -1 <(D0s+D0M)/(L×f)<3mm -1 . In the example, 2.2mm -1 <(D0s+D0M)/(L×f)≤2.9mm -1 . The outer diameter of the end part of the lens barrel close to the object side, the outer diameter of the end part of the lens barrel close to the image side, the correlation between the maximum length of the lens barrel and the total effective focal length of the lens group are reasonably controlled, the outer diameter of the end part of the lens barrel close to the object side and the outer diameter of the end part of the lens barrel close to the image side can be made to be as close as possible, so that the forming of the lens barrel is facilitated, meanwhile, the maximum length of the lens barrel is matched with the incident ray design of the optical imaging lens, the lens barrel is ensured to have enough thickness at the bearing position of the lens barrel and the first lens under the condition of not shielding the incident ray, and the assembly stability of the optical imaging lens is improved. In an example, the outer diameter D0s of the end of the lens barrel near the object side and the outer diameter D0M of the end of the lens barrel near the image side satisfy: 1<D0M/D0s<1.1。
In an exemplary embodiment, a third spacer element is provided between the third lens and the fourth lens. The inner diameter D3s of the third spacing element near the object side, the outer diameter D3s of the third spacing element near the object side, the center thickness CT3 of the third lens on the optical axis, and the curvature radius R5 of the object side of the third lens satisfy the following conditions: 0.2mm -1 <(D3s-d3s)/|CT3×R5|<3mm -1 . In the example, 0.5mm -1 <(D3s-d3s)/|CT3×R5|<2.9mm -1 . The incident light is converged between the second lens and the third lens, and then is transmitted to the image side in a divergent mode through the fourth lens, the fifth lens and the sixth lens, and the inner diameter of the third interval element close to the object side and the outer diameter of the third interval element close to the object side are reasonably controlled, so that the third interval element can effectively shield the generated stray light under the condition that the main light in the incident light is not influenced; the center thickness of the third lens on the optical axis and the curvature radius of the object side surface of the third lens are reasonably controlled, so that the principal ray in the incident ray can be transmitted in the third lens according to a preset path, the third lens is crucial for imaging of the optical imaging lens, the surface type of the third lens is reasonably controlled, and the imaging quality of the optical imaging lens can be improved.
In an exemplary embodiment, a fourth spacing element is provided between the fourth lens and the fifth lens. Wherein, the distance EP34 between the third spacing element and the fourth spacing element and the center thickness CT4 of the fourth lens on the optical axis satisfy the following conditions: 1.7< EP34/CT4<2.3. In the example, 1.9< EP34/CT 4.ltoreq.2.15. The interrelationship between the distance between the third interval element and the fourth interval element and the central thickness of the fourth lens on the optical axis is reasonably controlled, the edge thickness of the fourth lens and the overall thickness uniformity of the fourth lens can be controlled, the forming of the fourth lens is facilitated, and the assembly stability and the imaging quality of the optical imaging lens are improved.
In an exemplary embodiment, the inner diameter D2s of the second spacer element near the object side, the inner diameter D3s of the third spacer element near the object side, the outer diameter D3s of the third spacer element near the object side, the maximum effective radius DT32 of the image side of the third lens and the maximum effective radius DT42 of the image side of the fourth lens satisfy: 8.3< D3s/DT < 42+ (d2s+d3s)/DT 32<11.2. In an example, 9< d3s/dt42+ (d2s+d3s)/DT 32<11.2. The interrelation between the maximum effective radius of the second spacing element near the object side, the inner diameter of the third spacing element near the object side, the outer diameter of the third spacing element near the object side and the maximum effective radius of the image side of the third lens and the maximum effective radius of the image side of the fourth lens is reasonably controlled, so that the second spacing element and the third spacing element can effectively shield stray light, the second spacing element and the third spacing element are attached to the edge of the main light as much as possible, and the third spacing element is near the maximum effective radius of the image side of the third lens, so that the imaging quality of the optical imaging lens is improved. Meanwhile, as the outer diameter of the lens barrel is sequentially increased from the object side to the image side, the uniformity of the lens barrel can be ensured by controlling the ratio of the outer diameter of the third interval element close to the object side to the maximum effective radius of the image side of the fourth lens, and the improvement of the assembly stability of the optical imaging lens is facilitated.
In the exemplary embodiment, the center thickness CT3 of the third lens on the optical axis, the curvature radius R6 of the image side surface of the third lens, the outer diameter D2s of the second spacing element near the object side, and the inner diameter D3s of the third spacing element near the object side satisfy: 0< |CT3/R6|× (D2 s/D3 s) <1.5. In an example, 0.3< |CT3/R6|× (D2 s/D3 s) <1.25. The central thickness of the third lens on the optical axis, the curvature radius of the image side surface of the third lens, the correlation between the outer diameter of the second spacing element close to the object side and the inner diameter of the third spacing element close to the object side are reasonably controlled, so that the incident light rays can be ensured to show a converging trend when passing through the second lens, and a diverging trend when passing through the third lens; by controlling the ratio of the center thickness of the third lens on the optical axis to the curvature radius of the image side surface of the third lens, the rationality of the trend of the incident light rays passing through the third lens can be ensured; by controlling the outer diameter of the second spacing element close to the object side and the inner diameter of the third spacing element close to the object side, the second spacing element and the third spacing element can effectively shield stray light, and the imaging quality of the optical imaging lens is improved.
In an exemplary embodiment, a fifth spacer element and a sixth spacer element are provided between the fifth lens and the sixth lens. The radius of curvature R10 of the image side of the fifth lens element, the center thickness CT6 of the sixth lens element on the optical axis, the inner diameter d6m of the sixth spacer element near the image side, and the maximum effective radius DT61 of the object side of the sixth lens element satisfy the following conditions: 0< |R10/CT6| -d6m/DT61<0.8. In an example, 0.1< |R10/CT6| -d6m/DT61<0.7. The method has the advantages that the curvature radius of the image side surface of the fifth lens, the central thickness of the sixth lens on the optical axis, the inner diameter of the sixth spacing element close to the image side and the maximum effective radius of the object side surface of the sixth lens are reasonably controlled, the distance between the fifth lens and the sixth lens on the optical axis can be effectively controlled, the curvature radius of the image side surface of the fifth lens is larger, the central thickness of the sixth lens on the optical axis is smaller, a thickened fifth spacing element is additionally arranged between the fifth lens and the sixth lens and is matched with the two lenses, and meanwhile, the inner diameter of the sixth spacing element close to the image side is controlled to shield stray light, so that the imaging quality of the optical imaging lens is improved.
In the exemplary embodiment, the air space T12 of the first lens and the second lens on the optical axis, the object-side end surface of the lens barrel, and the distance EP01 of the first spacer element on the optical axis, the maximum effective radius DT21 of the object-side surface of the second lens, and the inner diameter d1s of the first spacer element near the object side satisfy: 2< T12/EP01+d1s/DT21<5.5. The air interval of the first lens and the second lens on the optical axis, the distance between the object side end surface of the lens barrel and the first spacing element on the optical axis, and the correlation between the maximum effective radius of the object side surface of the second lens and the inner diameter of the first spacing element close to the object side are reasonably controlled, so that incident light rays can be ensured to be converged between the second lens and the third lens through the first lens, the first lens is outwards protruded towards the object side, the second lens is relatively gentle, the air interval of the first lens and the second lens on the optical axis is relatively large, the incident light rays are ensured to be smoothly converged, and meanwhile, the inner diameter of the first spacing element close to the object side is close to the maximum effective radius of the object side surface of the second lens, stray light can be effectively shielded, and the imaging quality of the optical imaging lens is improved.
In the exemplary embodiment, the minimum opening inner diameter ds of the lens barrel near the object side, the air space T12 of the first lens and the second lens on the optical axis, the outer diameter D0M of the end of the lens barrel near the image side, the distance TD of the object side of the first lens to the image side of the sixth lens on the optical axis, and the f-number fno of the optical imaging lens satisfy: 6< ds/T12+D0M/(TD×fno) <12. The minimum opening inner diameter of the lens barrel close to the object side, the air interval of the first lens and the second lens on the optical axis, the outer diameter of the end part of the lens barrel close to the image side, the interrelation between the distance from the object side surface of the first lens to the image side surface of the sixth lens on the optical axis and the aperture number of the optical imaging lens are reasonably controlled, the rationality of the integral structure of the optical imaging lens can be ensured, the distance from the object side surface of the first lens to the image side surface of the sixth lens on the optical axis is determined by the whole light path, the length-height ratio of the optical imaging lens and the wall thickness of the lens barrel can be ensured reasonably, and the molding rationality and the assembly stability of the optical imaging lens are improved.
In the exemplary embodiment, the outer diameter D1s of the first spacing element near the object side, the inner diameter D2s of the second spacing element near the object side, the center thickness CT1 of the first lens on the optical axis, the center thickness CT2 of the second lens on the optical axis, and the air space T12 of the first lens and the second lens on the optical axis satisfy: 1< D1 s/(CT1+T12+CT2) -d1s/d2s <3.5. The interrelationship between the central thickness of the first spacing element, the central thickness of the second lens and the air spacing of the first lens and the second lens on the optical axis can be controlled effectively, the effective radius curvature of the first lens, the second lens and the third lens can be controlled effectively, the reasonable distribution of the constraint focal power is carried out, the upper performance limit of the optical imaging lens is improved, the wall thickness of each spacing element is ensured, and therefore the uniformity and the integral structural strength of the spacing elements are improved. Meanwhile, the size of the interval element is favorably controlled, stray light is effectively shielded, and the imaging quality of the optical imaging lens is improved.
In an exemplary embodiment, the outer diameter Dns of the nth spacing element of all the spacing elements near the object side and the center thickness CTn of the nth lens of all the lenses on the optical axis satisfy: 5< Dns/CTn <20, n.ltoreq.3. That is, 5< D1s/CT1<20,5< D2s/CT2<20,5< D3s/CT3<20, where D1s is the outer diameter of the first spacer element near the object side, D2s is the outer diameter of the second spacer element near the object side, D3s is the outer diameter of the third spacer element near the object side, CT1 is the center thickness of the first lens on the optical axis, CT2 is the center thickness of the second lens on the optical axis, and CT3 is the center thickness of the third lens on the optical axis. The interrelationship between the outer diameter of the nth spacing element close to the object side in all the spacing elements and the central thickness of the nth lens in all the lenses on the optical axis is reasonably controlled, the ratio of the outer diameter to the central thickness of the lenses can be effectively controlled, the ratio is controlled between 5 and 20, the forming feasibility of the lenses is ensured, and the phenomena of air trapping and welding marks are avoided. The ratio is controlled to be more than 5, so that the proper space inside the optical imaging lens is ensured, and the optical imaging lens has enough bearing and improves the assembly stability of the optical imaging lens; controlling the ratio to be less than 20 is mainly to limit the length of the optical imaging lens, and is beneficial to demolding of the lens.
In an exemplary embodiment, the optical imaging lens may further include a diaphragm to increase the relative illuminance of the optical imaging lens. The diaphragm can be arranged at a proper position according to actual needs. For example, a diaphragm may be disposed between the second lens and the third lens. Optionally, the optical imaging lens may further include a filter for correcting color deviation and/or a protective glass for protecting a photosensitive element located on the imaging surface.
The application provides an optical imaging lens which has a large field angle and can reduce stray light and maintain good optical performance. The optical imaging lens according to the above embodiment of the present application may employ a plurality of lenses, for example, six as described above. Through reasonable distribution of focal power, surface type, curvature radius, center thickness and the like of each lens, incident light rays can be effectively converged between the second lens and the third lens, then are transmitted back in a divergent mode and are transmitted to an image side through the fourth lens, the fifth lens and the sixth lens, the optical total length of the optical imaging lens is reduced, the processability of the optical imaging lens is improved, and the optical imaging lens is more beneficial to production and processing. Meanwhile, stray light can be effectively shielded by controlling the inner diameter and the outer diameter of each interval element close to the object side, and the imaging quality of the optical imaging lens is improved.
In an exemplary embodiment, 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 sixth 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, the fourth lens, the fifth lens, and the sixth 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, the fourth lens, the fifth lens and the sixth 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 six lenses are described as an example in the embodiment, the optical imaging lens is not limited to include six lenses. The optical imaging lens may also include other numbers of lenses, if desired.
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. 1 to 2B. Fig. 1 is a schematic diagram showing the structure of an optical imaging lens according to embodiment 1 of the present application.
As shown in fig. 1, the optical imaging lens sequentially includes, from an object side to an image side along an optical axis: the first lens E1, the first spacer element P1, the second lens E2, the second spacer element P2, the stop STO, the third lens E3, the third spacer element P3, the fourth lens E4, the fourth spacer element P4, the fifth lens E5, the fifth spacer element P5, the sixth spacer element P6, the sixth lens E6, the filter, and the imaging plane S15.
The first lens element E1 has negative refractive power, wherein an object-side surface S1 thereof is concave, 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 positive refractive power, wherein an object-side surface S5 thereof is convex, and an image-side surface S6 thereof is convex. The fourth lens element E4 has negative refractive power, wherein an object-side surface S7 thereof is convex and an image-side surface S8 thereof is concave. The fifth lens element E5 has positive refractive power, wherein an object-side surface S9 thereof is convex, and an image-side surface S10 thereof is convex. The sixth lens element E6 has negative refractive power, wherein an object-side surface S11 thereof is convex and an image-side surface S12 thereof is concave. The filter has an object side surface S13 and an image side surface S14. Light from the object sequentially passes through the respective surfaces S1 to S14 and is finally imaged on the imaging surface S15.
Table 1 shows the basic parameter table of the optical imaging lens of embodiment 1, in which the units of radius of curvature, thickness, and focal length are all millimeters (mm).
TABLE 1
In the present embodiment, the total effective focal length f=1.05 mm, the maximum length l=3.36 mm of the lens barrel, the distance ttl=3.66 mm on the optical axis from the object side surface S1 of the first lens E1 to the imaging surface S15, half of the diagonal length imgh=1.91 mm of the effective pixel area on the imaging surface S15, half of the maximum field angle Semi-fov= 62.32 ° of the optical imaging lens, and the f-number fno=2.38.
In embodiment 1, the object side surface and the image side surface of any one of the first lens E1 to the sixth lens E6 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 when the height of the aspherical surface is h along the optical axis direction, the distance from the vertex of the aspherical surface is sagittal; 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. Table 2 below shows the higher order coefficients A that can be used for each of the aspherical mirrors S1-S12 in example 1 4 、A 6 、A 8 、A 10 、A 12 、A 14 、A 16 、A 18 And A 20 。
| Face number | A4 | A6 | A8 | A10 | A12 | A14 | A16 | A18 | A20 |
| S1 | 6.7286E-01 | -1.1962E-01 | 3.3497E-02 | -1.0330E-02 | 3.4088E-03 | -1.4505E-03 | 4.1143E-04 | -1.2201E-04 | 2.8718E-05 |
| S2 | 2.4430E-01 | -8.3040E-02 | -3.2975E-04 | 1.4644E-03 | 1.5102E-03 | -1.8647E-04 | -2.7651E-04 | 5.8412E-05 | 5.3310E-06 |
| S3 | -3.2552E-02 | -5.0762E-03 | 1.9976E-03 | 1.4380E-04 | -5.8995E-05 | -2.8576E-05 | 1.1119E-05 | -4.8680E-06 | 1.1029E-06 |
| S4 | -2.0983E-03 | 8.8850E-04 | 5.3027E-04 | 5.9017E-05 | 5.7745E-06 | 3.1614E-06 | -3.3708E-06 | -2.9815E-06 | -1.7458E-06 |
| S5 | -1.1935E-03 | -3.7621E-04 | -6.0586E-05 | -1.1202E-06 | -2.3859E-07 | 2.0160E-06 | -5.2207E-07 | 2.1625E-07 | -3.3971E-08 |
| S6 | -5.9193E-02 | -2.1435E-03 | -1.1561E-03 | -5.8181E-06 | -4.7255E-05 | 1.5091E-05 | -5.4964E-06 | 8.6286E-06 | 6.0626E-07 |
| S7 | -1.3613E-01 | -4.4167E-04 | -1.4846E-03 | 4.3354E-04 | 1.2959E-04 | 9.2593E-05 | 5.8410E-07 | 1.9156E-06 | -2.3585E-06 |
| S8 | -1.9803E-01 | 2.2428E-02 | -2.7481E-03 | 1.5600E-03 | -1.6454E-04 | 1.4302E-04 | -5.3720E-05 | -4.8448E-06 | 7.6881E-07 |
| S9 | -7.5572E-02 | 3.0204E-03 | -1.5324E-03 | 1.3694E-03 | -3.4294E-04 | 2.2745E-04 | -3.8423E-05 | -3.4471E-05 | 8.7899E-06 |
| S10 | 1.0856E-01 | -4.9030E-02 | 1.7000E-02 | -3.3231E-03 | 1.5074E-03 | -1.4480E-03 | 3.7158E-04 | 3.2808E-05 | -1.3223E-05 |
| S11 | -6.2937E-01 | 5.3677E-02 | 2.6143E-02 | -5.3881E-04 | -3.6716E-03 | -1.7940E-03 | 1.0945E-03 | 2.0367E-04 | -1.1682E-04 |
| S12 | -7.8932E-01 | 1.0020E-01 | -1.5939E-02 | 1.0179E-02 | -3.3600E-03 | -8.3674E-04 | -1.7389E-04 | -8.2400E-05 | 1.5706E-04 |
TABLE 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 a meridional image plane curvature and a sagittal image plane curvature corresponding to different angles of view. As can be seen from fig. 2A to 2B, 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. 3 to 4B. Fig. 3 shows a schematic configuration of an optical imaging lens according to embodiment 2 of the present application.
As shown in fig. 3, the optical imaging lens sequentially includes, from an object side to an image side along an optical axis: the first lens E1, the first spacer element P1, the second lens E2, the second spacer element P2, the stop STO, the third lens E3, the third spacer element P3, the fourth lens E4, the fourth spacer element P4, the fifth lens E5, the fifth spacer element P5, the sixth spacer element P6, the sixth lens E6, the filter, and the imaging plane S15.
The first lens element E1 has negative refractive power, wherein an object-side surface S1 thereof is concave, 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 positive refractive power, wherein an object-side surface S5 thereof is convex, and an image-side surface S6 thereof is convex. The fourth lens element E4 has negative refractive power, wherein an object-side surface S7 thereof is convex and an image-side surface S8 thereof is concave. The fifth lens element E5 has positive refractive power, wherein an object-side surface S9 thereof is convex, and an image-side surface S10 thereof is convex. The sixth lens element E6 has negative refractive power, wherein an object-side surface S11 thereof is convex and an image-side surface S12 thereof is concave. The filter has an object side surface S13 and an image side surface S14. Light from the object sequentially passes through the respective surfaces S1 to S14 and is finally imaged on the imaging surface S15.
In the present embodiment, the total effective focal length f=1.05 mm, the maximum length l=3.36 mm of the lens barrel, the distance ttl=3.66 mm on the optical axis from the object side surface S1 of the first lens E1 to the imaging surface S15, half of the diagonal length imgh=1.91 mm of the effective pixel area on the imaging surface S15, half of the maximum field angle Semi-fov= 62.32 ° of the optical imaging lens, and the f-number fno=2.38.
Table 3 shows the basic parameter table of the optical imaging lens of embodiment 2, in which the units of radius of curvature, thickness, and focal length are all millimeters (mm).
TABLE 3 Table 3
In embodiment 2, the object side surface and the image side surface of any one of the first to sixth lenses E1 to E6 are aspherical surfaces. Table 4 below shows the higher order coefficients A that can be used for each of the aspherical mirrors S1-S12 in example 2 4 、A 6 、A 8 、A 10 、A 12 、A 14 、A 16 、A 18 And A 20 。
TABLE 4 Table 4
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 a meridional image plane curvature and a sagittal image plane curvature corresponding to different angles of view. As can be seen from fig. 4A to 4B, 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. 5 to 6B. Fig. 5 shows a schematic configuration diagram of an optical imaging lens according to embodiment 3 of the present application.
As shown in fig. 5, the optical imaging lens sequentially includes, from an object side to an image side along an optical axis: the first lens E1, the first spacer element P1, the second lens E2, the second spacer element P2, the stop STO, the third lens E3, the third spacer element P3, the fourth lens E4, the fourth spacer element P4, the fifth lens E5, the fifth spacer element P5, the sixth spacer element P6, the sixth lens E6, the filter, and the imaging plane S15.
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 positive refractive power, wherein an object-side surface S5 thereof is convex, and an image-side surface S6 thereof is convex. The fourth lens element E4 has negative refractive power, wherein an object-side surface S7 thereof is convex and an image-side surface S8 thereof is concave. The fifth lens element E5 has positive refractive power, wherein an object-side surface S9 thereof is convex, and an image-side surface S10 thereof is convex. The sixth lens element E6 has negative refractive power, wherein an object-side surface S11 thereof is convex and an image-side surface S12 thereof is concave. The filter has an object side surface S13 and an image side surface S14. Light from the object sequentially passes through the respective surfaces S1 to S14 and is finally imaged on the imaging surface S15.
In the present embodiment, the total effective focal length f=1.20 mm, the maximum length l=3.28 mm of the lens barrel, the distance ttl=4.16 mm on the optical axis from the object side surface S1 of the first lens E1 to the imaging surface S15, half of the diagonal length imgh=1.91 mm of the effective pixel area on the imaging surface S15, half of the maximum field angle Semi-fov=57.39° of the optical imaging lens, and the f-number fno=2.38.
Table 5 shows the basic parameter table of the optical imaging lens of embodiment 3, in which the units of radius of curvature, thickness, and focal length are all millimeters (mm).
TABLE 5
In embodiment 3, the object side surface and the image side surface of any one of the first to sixth lenses E1 to E6 are aspherical surfaces. Table 6 below shows the higher order coefficients A that can be used for each of the aspherical mirrors S1-S12 in example 3 4 、A 6 、A 8 、A 10 、A 12 、A 14 、A 16 、A 18 And A 20 。
| Face number | A4 | A6 | A8 | A10 | A12 | A14 | A16 | A18 | A20 |
| S1 | 5.5130E-01 | -9.8779E-02 | 3.1959E-02 | -4.7148E-03 | 3.7871E-03 | -1.0264E-03 | 3.8808E-04 | -1.6643E-04 | 4.6818E-05 |
| S2 | 2.1954E-01 | -8.0884E-02 | -1.1383E-02 | -2.3004E-03 | 1.6143E-03 | 1.1074E-04 | -3.1322E-04 | -2.3303E-04 | -9.6238E-05 |
| S3 | -3.1076E-02 | -4.9550E-04 | 1.8444E-03 | 8.1558E-05 | -1.3767E-04 | -2.3993E-05 | 1.2924E-05 | 5.4742E-06 | -5.9060E-07 |
| S4 | -6.8147E-03 | 4.9508E-04 | 3.7296E-04 | -1.0432E-06 | -6.2217E-06 | -5.6186E-06 | 1.5899E-06 | -1.1934E-06 | 4.4238E-07 |
| S5 | -1.7807E-03 | -4.2682E-04 | -4.8957E-05 | -6.3891E-06 | -1.1617E-06 | -1.4399E-07 | 5.0069E-07 | -2.6684E-07 | 3.6093E-08 |
| S6 | -5.6535E-02 | -1.5746E-03 | -6.9007E-04 | -5.0799E-05 | -3.6770E-05 | -1.3823E-06 | -2.2068E-06 | 1.4565E-07 | -2.9372E-07 |
| S7 | -1.2007E-01 | 1.1490E-03 | -5.6948E-04 | 2.8539E-04 | -2.1136E-05 | 3.1064E-05 | -7.5996E-06 | 3.5963E-06 | -1.4681E-06 |
| S8 | -1.8595E-01 | 2.1374E-02 | -2.6371E-03 | 1.0640E-03 | -2.7965E-04 | 1.2064E-04 | -5.1423E-05 | 1.4074E-05 | -7.5276E-06 |
| S9 | -5.1676E-02 | 7.4869E-03 | -2.1865E-03 | 1.1801E-03 | -2.9572E-04 | 1.4683E-04 | -3.3027E-05 | 7.0543E-06 | -2.1556E-06 |
| S10 | 8.4777E-02 | -4.3971E-02 | 1.6746E-02 | -3.1930E-03 | 2.4770E-03 | -5.6603E-04 | 4.3519E-04 | -6.0143E-05 | 1.9058E-05 |
| S11 | -4.1870E-01 | 3.3391E-02 | 6.7654E-03 | 1.3420E-03 | -4.9844E-04 | -5.8825E-04 | 6.0753E-04 | -3.1694E-04 | 5.8834E-05 |
| S12 | -6.3861E-01 | 1.0050E-01 | -2.3580E-02 | 1.2075E-02 | -4.7238E-03 | 2.0138E-03 | -1.0534E-03 | 3.6530E-05 | 3.5178E-05 |
TABLE 6
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 a meridional image plane curvature and a sagittal image plane curvature corresponding to different angles of view. As can be seen from fig. 6A to 6B, the optical imaging lens provided in embodiment 3 can achieve good imaging quality.
Example 4
An optical imaging lens according to embodiment 4 of the present application is described below with reference to fig. 7 to 8B. Fig. 7 shows a schematic configuration diagram of an optical imaging lens according to embodiment 4 of the present application.
As shown in fig. 7, the optical imaging lens sequentially includes, from an object side to an image side along an optical axis: the first lens E1, the first spacer element P1, the second lens E2, the second spacer element P2, the stop STO, the third lens E3, the third spacer element P3, the fourth lens E4, the fourth spacer element P4, the fifth lens E5, the fifth spacer element P5, the sixth spacer element P6, the sixth lens E6, the filter, and the imaging plane S15.
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 positive refractive power, wherein an object-side surface S5 thereof is convex, and an image-side surface S6 thereof is convex. The fourth lens element E4 has negative refractive power, wherein an object-side surface S7 thereof is convex and an image-side surface S8 thereof is concave. The fifth lens element E5 has positive refractive power, wherein an object-side surface S9 thereof is convex, and an image-side surface S10 thereof is convex. The sixth lens element E6 has negative refractive power, wherein an object-side surface S11 thereof is convex and an image-side surface S12 thereof is concave. The filter has an object side surface S13 and an image side surface S14. Light from the object sequentially passes through the respective surfaces S1 to S14 and is finally imaged on the imaging surface S15.
In the present embodiment, the total effective focal length f=1.20 mm, the maximum length l=3.28 mm of the lens barrel, the distance ttl=4.16 mm on the optical axis from the object side surface S1 of the first lens E1 to the imaging surface S15, half of the diagonal length imgh=1.91 mm of the effective pixel area on the imaging surface S15, half of the maximum field angle Semi-fov=57.39° of the optical imaging lens, and the f-number fno=2.38.
Table 7 shows a basic parameter table of the optical imaging lens of example 4, in which the units of radius of curvature, thickness, and focal length are all millimeters (mm).
TABLE 7
In embodiment 4, the object side surface and the image side surface of any one of the first to sixth lenses E1 to E6 are aspherical surfaces. Table 8 below shows the higher order coefficients A that can be used for each of the aspherical mirrors S1-S12 in example 4 4 、A 6 、A 8 、A 10 、A 12 、A 14 、A 16 、A 18 And A 20 。
TABLE 8
Fig. 8A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 4, which indicates a convergent focus deviation of light rays of different wavelengths after passing through the lens. Fig. 8B shows an astigmatism curve of the optical imaging lens of embodiment 4, which represents a meridional image plane curvature and a sagittal image plane curvature corresponding to different angles of view. As can be seen from fig. 8A to 8B, the optical imaging lens provided in embodiment 4 can achieve good imaging quality.
Example 5
An optical imaging lens according to embodiment 5 of the present application is described below with reference to fig. 9 to 10B. Fig. 9 shows a schematic configuration of an optical imaging lens according to embodiment 5 of the present application.
As shown in fig. 9, the optical imaging lens sequentially includes, from an object side to an image side along an optical axis: the first lens E1, the first spacer element P1, the second lens E2, the second spacer element P2, the stop STO, the third lens E3, the third spacer element P3, the fourth lens E4, the fourth spacer element P4, the fifth lens E5, the fifth spacer element P5, the sixth spacer element P6, the sixth lens E6, the filter, and the imaging plane S15.
The first lens element E1 has negative refractive power, wherein an object-side surface S1 thereof is concave, and an image-side surface S2 thereof is convex. 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 positive refractive power, wherein an object-side surface S5 thereof is convex, and an image-side surface S6 thereof is convex. The fourth lens element E4 has negative refractive power, wherein an object-side surface S7 thereof is convex and an image-side surface S8 thereof is concave. The fifth lens element E5 has positive refractive power, wherein an object-side surface S9 thereof is convex, and an image-side surface S10 thereof is convex. The sixth lens element E6 has negative refractive power, wherein an object-side surface S11 thereof is convex and an image-side surface S12 thereof is concave. The filter has an object side surface S13 and an image side surface S14. Light from the object sequentially passes through the respective surfaces S1 to S14 and is finally imaged on the imaging surface S15.
In the present embodiment, the total effective focal length f=1.35 mm of the optical imaging lens, the maximum length l=3.26 mm of the lens barrel, the distance ttl=3.61 mm on the optical axis from the object side surface S1 of the first lens E1 to the imaging surface S15, half of the diagonal length imgh=1.91 mm of the effective pixel area on the imaging surface S15, half of the maximum field angle of the optical imaging lens Semi-fov=54.78°, and the f-number fno=2.38.
Table 9 shows a basic parameter table of the optical imaging lens of embodiment 5, in which the units of radius of curvature, thickness, and focal length are all millimeters (mm).
TABLE 9
In embodiment 5, the object side surface and the image side surface of any one of the first to sixth lenses E1 to E6Are all aspheric. Table 10 below shows the higher order coefficients A that can be used for each of the aspherical mirrors S1-S12 in example 5 4 、A 6 、A 8 、A 10 、A 12 、A 14 、A 16 、A 18 And A 20 。
| Face number | A4 | A6 | A8 | A10 | A12 | A14 | A16 | A18 | A20 |
| S1 | 7.4947E-01 | -1.2256E-01 | 5.0381E-02 | 1.4464E-03 | 2.9074E-03 | -2.0334E-03 | 3.5098E-04 | -3.6362E-05 | 9.9061E-05 |
| S2 | 2.7250E-01 | -6.7409E-02 | 2.2033E-03 | 2.1912E-03 | 1.1118E-03 | -4.7672E-04 | -1.3199E-04 | 4.5953E-05 | 1.3117E-05 |
| S3 | -2.5439E-02 | -3.5576E-03 | 1.0991E-03 | 7.7120E-05 | 3.6337E-05 | -2.2527E-05 | 3.1008E-06 | -6.7006E-06 | 2.2629E-06 |
| S4 | -2.2001E-03 | 7.1620E-04 | 1.4028E-04 | 7.9848E-06 | 1.8884E-06 | 2.5464E-06 | 4.6090E-07 | 1.4025E-07 | -6.0233E-07 |
| S5 | -1.0359E-03 | -4.3357E-04 | -6.2983E-05 | -3.9405E-06 | -4.4095E-06 | 1.1858E-06 | -1.2613E-06 | 8.4312E-07 | -1.9537E-07 |
| S6 | -5.5849E-02 | -3.0791E-03 | -1.0521E-03 | -1.9539E-04 | -5.9491E-05 | -1.0617E-05 | 1.9626E-07 | -2.6513E-06 | -1.5692E-07 |
| S7 | -1.1876E-01 | 1.0556E-03 | -1.1510E-03 | 1.1859E-05 | -1.1032E-04 | 2.1391E-05 | -1.1186E-05 | 8.2859E-06 | -1.1333E-06 |
| S8 | -1.9049E-01 | 1.8199E-02 | -3.8701E-03 | 9.2180E-04 | -2.9252E-04 | 1.1797E-04 | -6.4080E-05 | 1.7298E-05 | -1.5307E-05 |
| S9 | -3.4685E-02 | 6.2882E-03 | -3.9907E-03 | 1.8355E-03 | -1.5600E-05 | 1.9022E-04 | -6.0885E-05 | 1.3557E-05 | -1.5287E-05 |
| S10 | 1.1426E-01 | -2.4176E-02 | 1.4443E-02 | -6.3181E-04 | 5.4354E-03 | 1.3755E-03 | 8.5742E-04 | 7.2792E-05 | 7.6807E-05 |
| S11 | -6.5253E-01 | -8.9801E-03 | 7.4158E-03 | 8.4112E-03 | 6.6088E-03 | 1.0915E-03 | 7.1456E-04 | 1.7360E-04 | 2.3737E-04 |
| S12 | -8.6639E-01 | 8.2117E-02 | -4.0648E-02 | 1.1771E-02 | -2.7673E-03 | 6.0903E-04 | -3.1432E-04 | 1.3047E-04 | -4.5207E-05 |
Table 10
Fig. 10A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 5, which indicates a convergent focus deviation of light rays of different wavelengths after passing through the lens. Fig. 10B shows an astigmatism curve of the optical imaging lens of embodiment 5, which represents a meridional image plane curvature and a sagittal image plane curvature corresponding to different angles of view. As can be seen from fig. 10A to 10B, the optical imaging lens provided in embodiment 5 can achieve good imaging quality.
Example 6
An optical imaging lens according to embodiment 6 of the present application is described below with reference to fig. 11 to 12B. Fig. 11 shows a schematic structural diagram of an optical imaging lens according to embodiment 6 of the present application.
As shown in fig. 11, the optical imaging lens sequentially includes, from an object side to an image side along an optical axis: the first lens E1, the first spacer element P1, the second lens E2, the second spacer element P2, the stop STO, the third lens E3, the third spacer element P3, the fourth lens E4, the fourth spacer element P4, the fifth lens E5, the fifth spacer element P5, the sixth spacer element P6, the sixth lens E6, the filter, and the imaging plane S15.
The first lens element E1 has negative refractive power, wherein an object-side surface S1 thereof is concave, and an image-side surface S2 thereof is convex. 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 positive refractive power, wherein an object-side surface S5 thereof is convex, and an image-side surface S6 thereof is convex. The fourth lens element E4 has negative refractive power, wherein an object-side surface S7 thereof is convex and an image-side surface S8 thereof is concave. The fifth lens element E5 has positive refractive power, wherein an object-side surface S9 thereof is convex, and an image-side surface S10 thereof is convex. The sixth lens element E6 has negative refractive power, wherein an object-side surface S11 thereof is convex and an image-side surface S12 thereof is concave. The filter has an object side surface S13 and an image side surface S14. Light from the object sequentially passes through the respective surfaces S1 to S14 and is finally imaged on the imaging surface S15.
In the present embodiment, the total effective focal length f=1.35 mm of the optical imaging lens, the maximum length l=3.26 mm of the lens barrel, the distance ttl=3.61 mm on the optical axis from the object side surface S1 of the first lens E1 to the imaging surface S15, half of the diagonal length imgh=1.91 mm of the effective pixel area on the imaging surface S15, half of the maximum field angle of the optical imaging lens Semi-fov=54.78°, and the f-number fno=2.38.
Table 11 shows a basic parameter table of the optical imaging lens of embodiment 6, in which the units of radius of curvature, thickness, and focal length are all millimeters (mm).
TABLE 11
In embodiment 6, the object side surface and the image side surface of any one of the first to sixth lenses E1 to E6 are aspherical surfaces. Table 1 below2 gives the higher order term coefficient A applicable to each of the aspherical mirror surfaces S1 to S12 in example 6 4 、A 6 、A 8 、A 10 、A 12 、A 14 、A 16 、A 18 And A 20 。
Table 12
Fig. 12A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 6, which indicates a convergent focus deviation of light rays of different wavelengths after passing through the lens. Fig. 12B shows an astigmatism curve of the optical imaging lens of embodiment 6, which represents a meridional image plane curvature and a sagittal image plane curvature corresponding to different angles of view. As can be seen from fig. 12A to 12B, the optical imaging lens provided in embodiment 6 can achieve good imaging quality.
The basic data in examples 1 to 6 also satisfy the relationships shown in table 13, respectively.
| Basic data/embodiment | 1 | 2 | 3 | 4 | 5 | 6 |
| d1s | 1.30 | 1.56 | 1.22 | 2.00 | 1.44 | 2.00 |
| D1s | 3.65 | 2.67 | 3.40 | 3.40 | 3.60 | 3.60 |
| d2s | 0.74 | 1.54 | 0.72 | 1.40 | 0.90 | 1.40 |
| d3s | 0.92 | 1.52 | 0.90 | 1.40 | 0.88 | 1.80 |
| D3s | 3.85 | 2.90 | 3.60 | 2.50 | 3.80 | 2.56 |
| d6s | 2.32 | 2.51 | 1.90 | 2.40 | 2.16 | 2.40 |
| ds | 2.40 | 2.40 | 2.15 | 2.15 | 2.33 | 2.33 |
| D0s | 4.87 | 4.87 | 4.65 | 4.65 | 4.81 | 4.81 |
| D0M | 5.34 | 5.34 | 5.10 | 5.10 | 5.26 | 5.26 |
| EP01 | 0.25 | 0.25 | 0.35 | 0.35 | 2.78 | 0.30 |
| EP34 | 0.42 | 0.45 | 0.39 | 0.43 | 0.39 | 0.40 |
TABLE 13
Fig. 13 is a schematic diagram illustrating the definition of the dimensions of the optical imaging lens, and the basic data ds, D1s, D2s, D3s, D6s, D0s, D1s, D3s, D0M, EP01, and EP34 in the above embodiment are all obtained by measuring the dimensions shown in fig. 13.
In summary, the conditional expressions in embodiment 1 to embodiment 6 satisfy the relationships shown in table 14, respectively.
TABLE 14
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 is not limited to the specific combinations of the features described above, but also covers other embodiments which may be formed by any combination of the features described above or their equivalents without departing from the spirit. 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. An optical imaging lens is characterized by comprising a lens barrel and a lens group assembled in the lens barrel, wherein the lens group sequentially comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens from an object side to an image side along an optical axis, and the first lens to the sixth lens are propped against the inner wall of the lens barrel;
the first lens and the fourth lens both have negative optical power;
the object side surface and the image side surface of the third lens are both convex surfaces;
a first spacing element is disposed between the first lens and the second lens;
a second spacing element is arranged between the second lens and the third lens; and
2.5<d1s/d2s+T12/CT1<5.5，
wherein d1s is the inner diameter of the first spacing element near the object side, d2s is the inner diameter of the second spacing element near the object side, T12 is the air spacing of the first lens and the second lens on the optical axis, and CT1 is the center thickness of the first lens on the optical axis.
2. The optical imaging lens according to claim 1, wherein an outer diameter D0s of an end of the lens barrel near the object side, an outer diameter D0M of an end of the lens barrel near the image side, a maximum length L of the lens barrel, and a total effective focal length f of the lens group satisfy:
2mm -1 <(D0s+D0M)/(L×f)<3mm -1 。
3. The optical imaging lens according to claim 1, wherein a third spacer element is disposed between the third lens and the fourth lens, an inner diameter D3s of the third spacer element near the object side, an outer diameter D3s of the third spacer element near the object side, a center thickness CT3 of the third lens on the optical axis, and a radius of curvature R5 of the object side of the third lens satisfy:
0.5mm -1 <(D3s-d3s)/|CT3×R5|<3mm -1 。
4. an optical imaging lens as defined in claim 3, wherein a fourth spacing element is disposed between the fourth lens and the fifth lens, and a distance EP34 between the third spacing element and the fourth spacing element and a center thickness CT4 of the fourth lens on an optical axis satisfy:
1.7<EP34/CT4<2.3。
5. the optical imaging lens according to claim 3, wherein a center thickness CT3 of the third lens on the optical axis, a radius of curvature R6 of an image side surface of the third lens, an outer diameter D2s of the second spacer element on the object side, and an inner diameter D3s of the third spacer element on the object side satisfy:
0<|CT3/R6|×(D2s/d3s)<1.5。
6. the optical imaging lens as claimed in claim 1, wherein a fifth spacer element and a sixth spacer element are disposed between the fifth lens and the sixth lens, a curvature radius R10 of an image side surface of the fifth lens, a center thickness CT6 of the sixth lens on an optical axis, an inner diameter d6m of the sixth spacer element near the image side, and a maximum effective radius DT61 of an object side surface of the sixth lens satisfy:
0<|R10/CT6|-d6m/DT61<0.8。
7. The optical imaging lens according to claim 1, wherein an air space T12 of the first lens and the second lens on an optical axis, a distance EP01 of an object side end surface of the lens barrel and the first spacer element on the optical axis, a maximum effective radius DT21 of the object side surface of the second lens, and an inner diameter d1s of the first spacer element near the object side satisfy:
2<T12/EP01+d1s/DT21<5.5。
8. the optical imaging lens according to claim 1, wherein a minimum opening inner diameter ds of the barrel near the object side, an air space T12 of the first lens and the second lens on the optical axis, an outer diameter D0M of an end of the barrel near the image side, a distance TD of the object side surface of the first lens to the image side surface of the sixth lens on the optical axis, and an f-number fno of the optical imaging lens satisfy:
6<ds/T12+D0M/(TD×fno)<12。
9. the optical imaging lens according to claim 8, wherein an outer diameter D1s of the first spacer element on the object side, an inner diameter D2s of the second spacer element on the object side, a center thickness CT1 of the first lens on the optical axis, a center thickness CT2 of the second lens on the optical axis, and an air interval T12 of the first lens and the second lens on the optical axis satisfy:
1<D1s/(CT1+T12+CT2)-d1s/d2s<3.5。
10. An optical imaging lens is characterized by comprising a lens barrel and a lens group assembled in the lens barrel, wherein the lens group sequentially comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens from an object side to an image side along an optical axis, and an air interval is arranged between any two adjacent lenses from the first lens to the sixth lens;
a first spacing element is disposed between the first lens and the second lens;
a second spacing element is arranged between the second lens and the third lens;
a third spacing element is arranged between the third lens and the fourth lens; and
5<Dns/CTn<20，
wherein Dns is the outer diameter of the nth spacing element of all the spacing elements close to the object side, CTn is the center thickness of the nth lens of all the lenses on the optical axis, and n is less than or equal to 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210469167.7A CN117008291A (en) | 2022-04-28 | 2022-04-28 | Optical imaging lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210469167.7A CN117008291A (en) | 2022-04-28 | 2022-04-28 | Optical imaging lens |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117008291A true CN117008291A (en) | 2023-11-07 |
Family
ID=88573238
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210469167.7A Pending CN117008291A (en) | 2022-04-28 | 2022-04-28 | Optical imaging lens |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117008291A (en) |
-
2022
- 2022-04-28 CN CN202210469167.7A patent/CN117008291A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109164560B (en) | Imaging lens | |
| CN107741630B (en) | Optical imaging lens | |
| CN109799599B (en) | Optical imaging lens | |
| US11054611B2 (en) | Optical imaging lens assembly | |
| CN108802972B (en) | Optical imaging system | |
| CN111399174A (en) | Imaging lens | |
| CN110133829B (en) | Optical imaging lens | |
| CN110456485B (en) | Image pickup lens group | |
| CN111399181A (en) | Optical imaging lens | |
| CN111679407A (en) | Optical imaging lens | |
| CN112799218A (en) | Optical imaging lens | |
| CN109856782B (en) | Optical imaging lens | |
| CN113093370B (en) | Optical imaging lens | |
| CN210015287U (en) | Optical imaging lens | |
| US20220196990A1 (en) | Optical imaging lens asssembly | |
| CN214751056U (en) | Optical imaging lens | |
| CN212933119U (en) | Optical imaging lens | |
| CN212111953U (en) | Optical imaging lens | |
| CN212846106U (en) | Optical imaging lens | |
| CN211698382U (en) | Optical imaging lens | |
| CN217060615U (en) | Optical imaging lens | |
| CN111722374A (en) | Optical imaging lens | |
| CN117008291A (en) | Optical imaging lens | |
| CN220357304U (en) | Optical lens | |
| CN219065862U (en) | Image pickup lens |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |