CN113391433B - Optical lens, camera module and electronic equipment - Google Patents
Optical lens, camera module and electronic equipment Download PDFInfo
- Publication number
- CN113391433B CN113391433B CN202110615010.6A CN202110615010A CN113391433B CN 113391433 B CN113391433 B CN 113391433B CN 202110615010 A CN202110615010 A CN 202110615010A CN 113391433 B CN113391433 B CN 113391433B
- Authority
- CN
- China
- Prior art keywords
- lens
- optical
- optical lens
- image
- lens element
- 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.)
- Active
Links
Images
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
- G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
- G02B13/008—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras designed for infrared light
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B30/00—Camera modules comprising integrated lens units and imaging units, specially adapted for being embedded in other devices, e.g. mobile phones or vehicles
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/50—Constructional details
- H04N23/55—Optical parts specially adapted for electronic image sensors; Mounting thereof
Abstract
The invention discloses an optical lens, a camera module and electronic equipment, wherein the optical lens comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens which are arranged in sequence from an object side to an image side along an optical axis; the first lens element with positive refractive power has a convex object-side surface and a concave image-side surface; the second lens element with negative refractive power has a convex object-side surface and a concave image-side surface; the sixth lens element with negative refractive power has a concave image-side surface; the optical lens satisfies the following relationship: 1.3mm < Imh ^2/TTL/Fno <1.42mm, wherein TTL is the distance between the object side surface of the first lens and the imaging surface of the optical lens on the optical axis, Imgh is half of the diagonal length of the effective pixel area on the imaging surface of the optical lens, and Fno is the diaphragm number of the optical lens. The optical lens, the camera module and the electronic equipment provided by the invention can meet the requirements of light, thin and small design, improve the image quality feeling of the optical lens and improve the resolution and imaging definition of the optical lens.
Description
Technical Field
The invention relates to the technical field of optical imaging, in particular to an optical lens, a camera module and electronic equipment.
Background
At present, with the development of the camera technology, people have higher and higher requirements on the imaging quality of the optical lens, and meanwhile, the structural characteristics of lightness, thinness and miniaturization gradually become the development trend of the optical lens. In the related art, under the condition of meeting the design trend of light, thin and small optical lenses, the image quality of the optical lenses is poor, the resolution is low, the imaging quality of the optical lenses is not clear enough, and the requirement of people on high-definition imaging of the optical lenses is difficult to meet.
Disclosure of Invention
The embodiment of the invention discloses an optical lens, a camera module and electronic equipment, which can improve the image quality of the optical lens and improve the resolution and imaging definition of the optical lens while realizing the light, thin and small design of the optical lens.
In order to achieve the above object, in a first aspect, the present invention discloses an optical lens including a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens arranged in order from an object side to an image side along an optical axis;
the first lens element with positive refractive power has a convex object-side surface at a paraxial region thereof and a concave image-side surface at a paraxial region thereof;
the second lens element with negative refractive power has a convex object-side surface at paraxial region and a concave image-side surface at paraxial region;
the third lens element with refractive power;
the fourth lens element with refractive power;
the fifth lens element with refractive power;
the sixth lens element with negative refractive power has a concave image-side surface at a paraxial region;
the optical lens satisfies the following relation:
1.3mm<Imgh^2/TTL/Fno<1.42mm；
wherein, TTL is a distance on the optical axis from the object side surface of the first lens element to the imaging surface of the optical lens, imageh is a half of a diagonal length of an effective pixel area on the imaging surface of the optical lens, and Fno is an f-number of the optical lens.
The optical lens provided by the application comprises the first lens with positive bending force and the second lens with negative bending force, so that the spherical aberration of the optical lens on an optical axis can be corrected, and the resolution can be improved; the object side surfaces of the first lens and the second lens are convex surfaces at the optical axis, and the image side surfaces of the first lens and the second lens are concave surfaces at the optical axis, so that the light rays of the optical lens can be converged, and the optical performance of the optical lens can be improved; meanwhile, the optical lens further comprises a sixth lens with negative bending force, and the object side surface of the sixth lens is a convex surface at the optical axis, so that the field curvature of the optical lens can be corrected, and the optical performance of the optical lens is improved.
That is, in the optical lens provided in the present application, the refractive power and the surface shape of each lens element are reasonably configured by selecting an appropriate number of lens elements, and the optical lens satisfies the following relation: when the thickness of the optical lens is 1.3mm < Imgh ^2/TTL/Fno <1.42mm, the optical lens can be designed to be light, thin and small, and on one hand, the optical lens has the characteristic of a large image surface, the image quality of the optical lens is improved, the resolution and the imaging definition of the optical lens are improved, the optical lens has a better imaging effect, and the requirement of people on high-definition imaging of the optical lens is met. On the other hand, still be favorable to making optical lens has the characteristics of large aperture, has bigger light inlet quantity, not only can make optical lens acquires more scene contents, enriches optical lens's imaging information still can improve the dim light and shoot the condition to can be when realizing the high clear shooting effect of high picture quality, be favorable to being applicable to the dim light environment such as night scene, rainy day, starry sky and shoot, and have better blurring effect.
As an alternative implementation, in an embodiment of the first aspect of the present invention, the optical lens satisfies the following relation: TTL/Imgh < 1.3.
When the relation is satisfied, the structure of the optical lens is more compact, the optical lens has the ultrathin characteristic, and the design requirement of miniaturization is satisfied; when the optical length exceeds the upper limit of the relation, the total optical length of the optical lens (i.e., the distance from the object-side surface of the first lens element to the image plane of the optical lens on the optical axis) is too long, which is not favorable for the miniaturization of the optical lens.
As an alternative implementation, in an embodiment of the first aspect of the present invention, the optical lens satisfies the following relation: 0.3< | f2/f6| < 5;
wherein f2 is the effective focal length of the second lens, and f6 is the effective focal length of the sixth lens.
By reasonably controlling the ratio of the effective focal lengths of the second lens and the sixth lens, the spherical aberration contributions of the second lens and the sixth lens can be reasonably distributed, so that the effective pixel area on the imaging surface of the optical lens has good imaging quality.
As an optional implementation manner, in an embodiment of the first aspect of the present invention, the optical lens satisfies the following relation: fno < 2.0.
Through the limitation of the relational expression, the optical lens is ensured to have the characteristic of large aperture, so that the optical lens has enough light entering amount, the shot image of the optical lens is enabled to be clearer, and high-quality shooting and clear imaging in object space scenes with low brightness, such as night scenes, starry sky scenes and the like, are facilitated.
As an alternative implementation, in an embodiment of the first aspect of the present invention, the optical lens satisfies the following relation: 0.1< D5/CT6< 0.7;
wherein D5 is an air gap between the fourth lens element and the fifth lens element on the optical axis, and CT6 is a thickness of the sixth lens element on the optical axis.
By reasonably controlling the ratio of the air gap between the fourth lens and the fifth lens on the optical axis to the thickness of the sixth lens on the optical axis to be in a certain range, the high-level aberration generated by the optical lens can be effectively balanced, the field curvature of the optical lens can be properly adjusted in the engineering manufacturing process, and the imaging quality of the optical lens is improved.
As an alternative implementation, in an embodiment of the first aspect of the present invention, the optical lens satisfies the following relation: 1.5< R4/R5< 5;
wherein R4 is a radius of curvature of an object-side surface of the second lens at the optical axis, and R5 is a radius of curvature of an image-side surface of the second lens at the optical axis.
By reasonably controlling the ratio of the curvature radiuses of the object side surface and the image side surface of the second lens at the optical axis, the aberration of the optical lens can be effectively balanced, the sensitivity of the optical lens is reduced, and the optical performance of the optical lens is improved.
As an alternative implementation, in an embodiment of the first aspect of the present invention, the optical lens satisfies the following relation: 0.3< SAG51/CT5< 1.0;
SAG51 is the distance from the intersection point of the object side surface of the fifth lens and the optical axis to the maximum effective radius of the object side surface of the fifth lens on the optical axis, and CT5 is the thickness of the fifth lens on the optical axis.
The definition of the relational expression is beneficial to the processing and molding of the fifth lens, the manufacturing sensitivity is reduced, and the manufacturing can be better realized. When the height of the fifth lens element is lower than the lower limit of the relation, the rise of the fifth lens element is lower, which affects the optical performance of the optical lens; when the upper limit of the above relation is exceeded, the fifth lens is relatively difficult to manufacture, which increases the difficulty and cost of manufacturing the optical lens.
As an alternative implementation, in an embodiment of the first aspect of the present invention, the optical lens satisfies the following relation: 2< (R11+ R12)/(R11-R12) < 7;
wherein R11 is a radius of curvature of an object-side surface of the sixth lens element at the optical axis, and R12 is a radius of curvature of an image-side surface of the sixth lens element at the optical axis.
Through the limitation of the relational expression, the curvature radius of the object side surface of the sixth lens element at the optical axis and the curvature radius of the image side surface of the sixth lens element at the optical axis are proper, so that the processability of the shape of the sixth lens element can be ensured, the astigmatism of the optical lens can be effectively improved, and the optical performance of the optical lens can be improved.
As an optional implementation manner, in an embodiment of the first aspect of the present invention, the optical lens satisfies the following relation: 0.2< f6/(f1+ f2) < 3;
wherein f1 is the effective focal length of the first lens, f2 is the effective focal length of the second lens, and f6 is the effective focal length of the sixth lens.
Through the limitation of the relational expression, the ratio of the effective focal length of the sixth lens to the sum of the effective focal lengths of the first lens and the second lens is controlled to be in a certain range, so that the spherical aberration contributions of the first lens, the second lens and the sixth lens can be reasonably distributed, and an effective pixel area on an imaging surface of the optical lens has good imaging quality.
In a second aspect, the present invention discloses a camera module, which includes a photosensitive chip and the optical lens according to the first aspect, wherein the photosensitive chip is disposed on an image side of the optical lens. The camera module with the optical lens can meet the requirements of light, thin and small design, is favorable for enabling the camera module to have the characteristic of large image surface, improves the picture texture and the resolution and the imaging definition. Simultaneously still be favorable to making optical lens has the characteristics of large aperture, has bigger light inlet quantity, can improve the dim light and shoot the condition to can effectively promote the module of making a video recording and shoot the quality under the dim light environment, be favorable to being applicable to dark light environment such as night scene, rainy day, starry sky and shoot.
In a third aspect, the invention further discloses an electronic device, which includes a housing and the camera module set according to the second aspect, and the camera module set is disposed on the housing. The electronic equipment with the camera module can meet the requirements of light, thin and small design, is favorable for making the camera module have the characteristic of large image surface, improves the texture of pictures, and improves the resolution and the imaging definition. Simultaneously still be favorable to making optical lens has the characteristics of large aperture, has bigger light inlet quantity, can improve the dim light and shoot the condition to can effectively promote the module of making a video recording and shoot the quality under the dim light environment, be favorable to being applicable to dark light environment such as night scene, rainy day, starry sky and shoot.
Compared with the prior art, the invention has the beneficial effects that:
in the optical lens, the camera module and the electronic device provided by the embodiment of the invention, the optical lens adopts six lens elements, the number of the used lens elements is relatively small, the light, thin and miniaturized design of the optical lens is favorably realized, the refractive power and the surface shape of each lens element are designed, and the optical lens meets the following relational expression: when 1.3mm < Imgh ^2/TTL/Fno <1.42mm, the design of lightness, thinness and miniaturization of the optical lens can be realized, the characteristic of large image surface of the optical lens is facilitated, the painting texture of the optical lens is improved, the resolution and the imaging definition of the optical lens are improved, the optical lens has a better imaging effect, and the requirement of people on high-definition imaging of the optical lens is met. Furthermore, the optical lens has the characteristic of large aperture, has larger light inlet quantity, can improve the dim light shooting condition, is suitable for shooting in dim light environments such as night scenes, rainy days, starry sky and the like while realizing the high-image-quality and high-definition shooting effect, and has better blurring effect.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an optical lens disclosed in a first embodiment of the present application;
fig. 2 is a light ray spherical aberration diagram (mm), an astigmatism diagram (mm), and a distortion diagram (%);
fig. 3 is a schematic structural diagram of an optical lens disclosed in the second embodiment of the present application;
fig. 4 is a light ray spherical aberration diagram (mm), an astigmatism diagram (mm), and a distortion diagram (%);
fig. 5 is a schematic structural diagram of an optical lens disclosed in a third embodiment of the present application;
fig. 6 is a light ray spherical aberration diagram (mm), an astigmatism diagram (mm), and a distortion diagram (%);
fig. 7 is a schematic structural diagram of an optical lens disclosed in a fourth embodiment of the present application;
fig. 8 is a graph of spherical aberration (mm), astigmatism (mm), and distortion ((%) of an optical lens disclosed in a fourth embodiment of the present application;
fig. 9 is a schematic structural diagram of an optical lens disclosed in a fifth embodiment of the present application;
fig. 10 is a light ray spherical aberration diagram (mm), an astigmatism diagram (mm), and a distortion diagram (%);
fig. 11 is a schematic structural diagram of an optical lens disclosed in a fifth embodiment of the present application;
fig. 12 is a ray spherical aberration diagram (mm), an astigmatism diagram (mm), and a distortion diagram (%);
fig. 13 is a schematic structural diagram of the camera module disclosed in the present application;
fig. 14 is a schematic structural diagram of an electronic device disclosed in the present application.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the present invention, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "center", "vertical", "horizontal", "lateral", "longitudinal", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings. These terms are used primarily to better describe the invention and its embodiments and are not intended to limit the indicated devices, elements or components to a particular orientation or to be constructed and operated in a particular orientation.
Moreover, some of the above terms may be used to indicate other meanings besides the orientation or positional relationship, for example, the term "on" may also be used to indicate some kind of attachment or connection relationship in some cases. The specific meanings of these terms in the present invention can be understood by those skilled in the art as appropriate.
Furthermore, the terms "mounted," "disposed," "provided," "connected," and "connected" are to be construed broadly. For example, it may be a fixed connection, a removable connection, or a unitary construction; can be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements or components. The specific meanings of the above terms in the present invention can be understood by those of ordinary skill in the art according to specific situations.
Furthermore, the terms "first," "second," and the like, are used primarily to distinguish one device, element, or component from another (the specific nature and configuration may be the same or different), and are not used to indicate or imply the relative importance or number of the indicated devices, elements, or components. "plurality" means two or more unless otherwise specified.
The technical solution of the present invention will be further described with reference to the following embodiments and the accompanying drawings.
Referring to fig. 1, according to a first aspect of the present application, the present application discloses an optical lens 100, where the optical lens 100 includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, and a sixth lens L6, which are disposed in order from an object side to an image side along an optical axis O. During imaging, light enters the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5 and the sixth lens L6 in sequence from the object side of the first lens L1, and is finally imaged on the imaging surface 101 of the optical lens 100. The first lens element L1 has positive refractive power, the second lens element L2 has negative refractive power, the third lens element L3, the fourth lens element L4 and the fifth lens element L5 have refractive power (e.g., positive refractive power or negative refractive power), and the sixth lens element L6 has negative refractive power.
Further, the object-side surface S1 of the first lens element L1 may be convex at the paraxial region O, the image-side surface S2 of the first lens element L1 may be concave at the paraxial region O, the object-side surface S3 of the second lens element L2 may be convex at the paraxial region O, the image-side surface S4 of the second lens element L2 may be concave or concave at the paraxial region O, the object-side surface S5 of the third lens element L3 may be convex or concave at the paraxial region O, the image-side surface S6 of the third lens element L3 may be convex or concave at the paraxial region O, the object-side surface S7 of the fourth lens element L4 may be convex or concave at the paraxial region O, the image-side surface S8 of the fourth lens element L4 may be convex or concave at the paraxial region O, the object-side surface S9 of the fifth lens element L5 may be convex or concave at the paraxial region O, the image-side surface S5 of the fifth lens element L4 may be convex or concave at the paraxial region O, the object-side surface S4624 may be convex or concave at the paraxial region O, the image-side surface S12 of the sixth lens element L6 may be concave at the paraxial region O.
As can be seen from the above, the optical lens 100 includes the combination of the first lens L1 with positive refractive power and the second lens L2 with negative refractive power, which is beneficial for correcting the spherical aberration of the optical lens 100 at the optical axis O; the optical lens system further comprises a third lens L3 and a fourth lens L4 with positive and negative refractive power, which are beneficial to correcting astigmatism and coma aberration of the optical lens 100; the optical lens further comprises a fifth lens L5 with positive bending force, which is beneficial to realizing the miniaturization requirement of the optical lens 100; a sixth lens L6 with negative bending force is also included to help correct curvature of field of the optical lens 100.
Furthermore, the object-side surface S1 of the first lens element L1 and the object-side surface S3 of the second lens element L2 are convex at the paraxial region O, and the image-side surface S2 of the first lens element L1 and the image-side surface S4 of the second lens element L2 are concave at the paraxial region O, which is favorable for converging light rays of the optical lens and improves the optical performance of the optical lens 100; the object-side surface S5 of the third lens element L3 and the object-side surface S7 of the fourth lens element L4 may both be concave at a position near the optical axis O, which is favorable for reducing the sensitivity of the optical lens 100 and for facilitating the engineering manufacture of the optical lens 100; the object-side surface S9 of the fifth lens element L5 and the object-side surface S11 of the sixth lens element L6 may both be convex at a position near the optical axis O, which is beneficial to correcting curvature of field of the optical lens 100 and improving the optical performance of the optical lens 100.
It is considered that the optical lens 100 is often used in electronic devices such as an in-vehicle device and a drive recorder or in an automobile. When the optical lens 100 is used as a camera on an automobile body, the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5 and the sixth lens L6 can be made of plastic, so that the optical lens 100 has a good optical effect, and the overall weight of the optical lens 100 can be reduced. Meanwhile, the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5 and the sixth lens L6 may all be aspheric.
In addition, it is understood that, in other embodiments, when the optical lens 100 is applicable to an electronic device such as a smart phone or a smart tablet, the material of the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5, and the sixth lens L6 may also be plastic or glass, and each lens may also be an aspheric surface or a spherical surface.
In some embodiments, the optical lens 100 further includes a stop 102, and the stop 102 may be an aperture stop or a field stop, which may be disposed between the object side of the optical lens 100 and the object side S1 of the first lens L1. It is understood that, in other embodiments, the stop 102 may also be disposed between two adjacent lenses, for example, between the second lens L2 and the third lens L3, and the arrangement is adjusted according to the actual situation, which is not specifically limited in this embodiment.
In some embodiments, the optical lens 100 further includes a filter L7, such as an infrared filter, disposed between the image side S12 of the sixth lens element L6 and the image plane 101 of the optical lens 100, so as to filter out light in other wavelength bands, such as visible light, and only allow infrared light to pass through, and therefore, the optical lens 100 can be used as an infrared optical lens, that is, the optical lens 100 can also image in a dark environment and other special application scenes and can obtain a better image effect.
In some embodiments, the optical lens 100 satisfies the following relationship: 1.3mm < Imgh ^2/TTL/Fno <1.42 mm; wherein, TTL is a distance from the object-side surface S1 of the first lens element L1 to the image plane 101 of the optical lens 100 on the optical axis O, and "Imgh" is a half of a diagonal length of an effective pixel area on the image plane 101 of the optical lens 100, and Fno is an f-number of the optical lens 100. When the relation is satisfied, on the basis of satisfying the ultra-thin and miniaturized design, on one hand, the optical lens 100 is enabled to have the characteristic of a large image plane, the painting texture of the optical lens 100 is improved, the resolution and the imaging definition of the optical lens 100 are improved, the optical lens 100 has a better imaging effect, and the requirement of people on high-definition imaging of the optical lens 100 is satisfied; on the other hand, the optical lens 100 can acquire more scene contents, enrich imaging information of the optical lens 100, and facilitate the optical lens 100 to have a characteristic of large aperture, have a larger light-entering amount, and improve a dim light shooting condition, so that the high-definition shooting effect of high image quality can be realized, and the high-definition optical lens is suitable for shooting in dim light environments such as night scenes, rainy days, starry sky and the like, and has a better blurring effect.
When the lower limit of the above relation is exceeded, the optical lens 100 is difficult to obtain better optical performance, the optical lens 100 is difficult to satisfy the requirement of high-pixel imaging, and the capturing of details of the object is not facilitated, which is disadvantageous for the ultra-thin and miniaturized design of the optical lens 100 and for the characteristic of large aperture of the optical lens 100.
In some embodiments, the optical lens 100 satisfies the following relationship: TTL/Imgh is less than 1.3. The limitation of the relational expression is beneficial to enabling the structure of the optical lens 100 to be more compact and to have the ultrathin characteristic, and the design requirement of miniaturization is met; if the upper limit of the relation is exceeded, the total optical length of the optical lens 100 (i.e. the distance from the object-side surface S1 of the first lens element L1 to the image plane of the optical lens 100 on the optical axis) is too long, which is not favorable for the miniaturization of the optical lens 100.
In some embodiments, the optical lens 100 satisfies the following relationship: 0.3< | f2/f6| < 5; where f2 is the effective focal length of the second lens L2, and f6 is the effective focal length of the sixth lens L6. By reasonably controlling the ratio of the effective focal lengths of the second lens L2 and the sixth lens L6, the spherical aberration contributions of the second lens L2 and the sixth lens L6 can be reasonably distributed, so that the effective pixel area on the imaging surface 100 of the optical lens 100 has good imaging quality. When the lower limit of the above relation is lower, the difficulty of correcting the aberration of the optical lens 100 is increased; if the upper limit of the above relation is exceeded, it is not favorable for the optical lens 100 to acquire the object space optical information, so that the imaging effect is difficult to meet the expected requirement.
In some embodiments, the optical lens 100 satisfies the following relationship: fno < 2.0. Through the above-mentioned relation limitation, it is favorable to ensure that the optical lens 100 has the characteristic of large aperture, so that the optical lens 100 has sufficient light entering amount, thereby being favorable to making the shot image of the optical lens 100 clearer, and being favorable to realizing high-quality shooting and clear imaging in object space scenes with low brightness, such as night scenes, starry sky, and the like.
In some embodiments, the optical lens 100 satisfies the following relationship: 0.1< D5/CT6< 0.7; wherein D5 is an air gap on the optical axis O between the fourth lens L4 and the fifth lens L5, and CT6 is a thickness of the sixth lens L6 on the optical axis O.
By reasonably controlling the ratio of the air gap on the optical axis O between the fourth lens L4 and the fifth lens L5 to the thickness of the sixth lens L6 on the optical axis O within a certain range, the high-order aberration generated by the optical lens 100 can be effectively balanced, and the field curvature of the optical lens 100 can be properly adjusted in the engineering process, so as to improve the imaging quality of the optical lens 100. When the lower limit of the above relation is lower, the high-order aberrations of the optical lens 100 are difficult to balance, which affects the imaging quality; when the upper limit of the relation is exceeded, the chief ray angle of the optical lens 100 is difficult to match with the chief ray angle of the photo-sensitive chip on the image plane.
In some embodiments, the optical lens 1 satisfies the following relation: 1.5< R4/R5< 5; wherein, R4 is a curvature radius of the object-side surface S3 of the second lens element L2 along the optical axis O, and R5 is a curvature radius of the image-side surface S4 of the second lens element L2 along the optical axis O.
By reasonably controlling the ratio of the curvature radii of the object-side surface S3 of the second lens element L2 and the image-side surface S4 of the second lens element L2 at the optical axis O, the aberrations of the optical lens 100 can be effectively balanced, the sensitivity of the optical lens 100 can be reduced, and the optical performance of the optical lens 100 can be improved. When the value is lower than the lower limit of the above relation, the sensitivity of the optical lens 100 is increased, which is not favorable for engineering manufacture; on the other hand, if the upper limit of the relational expression is exceeded, it is difficult to correct the curvature of field aberration of the optical lens 100, and the optical performance of the optical lens 100 is not good.
In some embodiments, the optical lens 100 satisfies the following relationship: 1.0< TTL/f < 1.5; wherein, TTL is a distance from the object-side surface S1 of the first lens element L1 to the image plane 100 of the optical lens system 100 on the optical axis O, and f is an effective focal length of the optical lens system 100.
The above relation is used to shorten the total optical length of the optical lens 100, so that the structure of the optical lens 100 is more compact, and it is also used to avoid the over-large field angle of the optical lens 100, so that the optical lens 100 can be balanced between the miniaturization design and the reduction of the aberration in the large field of view. When the optical length is less than the lower limit of the above relation, the total optical length of the optical lens 100 is too short, which increases the sensitivity of the optical lens 100 and makes it difficult to correct the aberration of the optical lens 100; or, the angle of view of the optical lens 100 is too small to satisfy the characteristics of a large field of view. When the upper limit of the relation is exceeded, the total optical length of the optical lens 100 is too long, which is not favorable for miniaturization design, and the light of the marginal field of view is difficult to image on the effective imaging area of the imaging plane 101, thereby causing incomplete imaging information and affecting the imaging quality.
In some embodiments, the optical lens 100 satisfies the following relationship:
0.3< SAG51/CT5< 1.0; SAG51 is the distance on the optical axis O between the intersection point of the object-side surface S9 of the fifth lens L5 and the optical axis O and the maximum effective radius of the object-side surface S9 of the fifth lens L5, and CT5 is the thickness of the fifth lens L5 on the optical axis O. The limitation of the relational expression is beneficial to the processing and molding of the fifth lens L5, the manufacturing sensitivity is reduced, and the engineering manufacturing can be better realized. When the height of the fifth lens L5 is lower than the lower limit of the above relation, the optical performance of the optical lens 100 may be affected, for example, the optical lens 100 is exposed too much, the brightness of the light is too high, the imaging resolution of the optical lens 100 is easily affected, and finally the picture quality is affected; if the upper limit of the relation is exceeded, not only is the manufacturing of the fifth lens L5 relatively difficult, but also the amount of light entering the optical lens 100 is insufficient, and the relative brightness of the light is insufficient, thereby reducing the image sharpness.
In some embodiments, the optical lens 100 satisfies the following relationship:
2< (R12+ R13)/(R12-R13) < 7; wherein, R12 is a curvature radius of the object-side surface S11 of the sixth lens element L6 along the optical axis O, and R13 is a curvature radius of the image-side surface S12 of the sixth lens element L6 along the optical axis O.
Through the limitation of the above relation, the curvature radius of the object-side surface S11 of the sixth lens element L6 at the optical axis O and the curvature radius of the image-side surface S12 at the optical axis O are suitable, so that the processability of the shape of the sixth lens element L6 can be ensured, and the astigmatism of the optical lens element 100 can be effectively improved, thereby improving the optical performance of the optical lens element 100. If the value is less than the lower limit of the above relational expression, the aberration generated in the sixth lens element L6 is difficult to correct, and the optical performance of the optical lens 100 is affected, whereas if the value exceeds the upper limit of the relational expression, the sensitivity of the optical lens 100 is increased, and the stability of the lens assembly is affected.
In some embodiments, the optical lens 100 satisfies the following relationship: 0.2< f6/(f1+ f2) < 3; wherein f1 is the effective focal length of the first lens L1, f2 is the effective focal length of the second lens L2, and f6 is the effective focal length of the sixth lens L6.
By the above-mentioned limitation of the relational expression, the ratio of the effective focal length of the sixth lens L6 to the sum of the effective focal lengths of the first lens L1 and the second lens L2 is controlled to be in a certain range, so that the spherical aberration contributions of the first lens L1, the second lens L2 and the sixth lens L6 can be reasonably distributed, and the effective pixel area on the imaging surface 101 of the optical lens 100 has good imaging quality.
The optical lens 100 of the present embodiment will be described in detail with reference to specific parameters.
First embodiment
A schematic structural diagram of an optical lens 100 disclosed in the first embodiment of the present application is shown in fig. 1, where the optical lens 100 includes a first lens L1, a second lens L2, a stop 102, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, and a filter L7, which are disposed in order from an object side to an image side along an optical axis O. For materials of the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5, and the sixth lens L6, reference may be made to the above-mentioned specific embodiments, and details are not repeated here.
Further, the first lens element L1 has positive refractive power, the second lens element L2 has negative refractive power, the third lens element L3 has positive refractive power, the fourth lens element L4 has negative refractive power, the fifth lens element L5 has positive refractive power, and the sixth lens element L6 has negative refractive power.
Further, the object-side surface S1 and the image-side surface S2 of the first lens element L1 are convex and concave, respectively, near the optical axis O; the object-side surface S1 and the image-side surface S2 of the first lens element L1 are convex at their circumferences. The object-side surface S3 and the image-side surface S4 of the second lens element L2 are convex and concave, respectively, near the optical axis O; the object-side surface S3 and the image-side surface S4 of the second lens element L2 are concave and convex, respectively, at the circumference. The object-side surface S5 and the image-side surface S6 of the third lens element L3 are convex at the paraxial region O; the object-side surface S5 and the image-side surface S6 of the third lens L3 are concave and convex, respectively, at the circumference. The object-side surface S7 and the image-side surface S8 of the fourth lens element L4 are convex and concave, respectively, at a paraxial region O; the object-side surface S7 and the image-side surface S8 of the four-lens L4 are concave and convex, respectively, at the circumference. The object-side surface S9 and the image-side surface S10 of the fifth lens element L5 are convex and concave, respectively, at a paraxial region O; the object-side surface S9 and the image-side surface S10 of the fifth lens L5 are concave and convex, respectively, at the circumference. The object-side surface S11 and the image-side surface S12 of the sixth lens element L6 are convex and concave, respectively, at a paraxial region O; the object-side surface S11 and the image-side surface S12 of the sixth lens element L6 are concave and convex, respectively, at the circumference.
Specifically, other parameters of the optical lens 100 are given in table 1 below, taking as an example that the effective focal length f of the optical lens 100 is 3.49mm, the field angle FOV of the optical lens 100 is 87.4 °, the total optical length TTL of the optical lens 100 is 4.2mm, and the aperture size FNO is 1.95. The elements of the optical lens 100 from the object side to the image side along the optical axis O are arranged in the order of the elements from top to bottom in table 1. In the same lens, the surface with the smaller number of surfaces is the object side surface of the lens, and the surface with the larger number of surfaces is the image side surface of the lens, and for example, the numbers 2 and 3 correspond to the object side surface S1 and the image side surface S2 of the first lens L1, respectively. The Y radius in table 1 is the radius of curvature of the object or image side of the corresponding face number at the paraxial region O. The first value in the "thickness" parameter list of a lens is the thickness of the lens on the optical axis O, and the second value is the distance from the image-side surface to the back surface of the lens on the optical axis O. The numerical value of the stop 102 in the "thickness" parameter column is the distance on the optical axis O from the stop 102 to the vertex of the next surface (the vertex refers to the intersection point of the surface and the optical axis O), the direction from the object side of the first lens L1 to the image side of the last lens is the positive direction of the optical axis O, when the value is negative, it indicates that the stop 102 is disposed on the right side of the vertex of the next surface, and if the thickness of the stop 102 is positive, the stop 102 is disposed on the left side of the vertex of the next surface. It is understood that the units of the radius Y, thickness, and focal length in table 1 are all mm. And the reference wavelength of the refractive index and Abbe number of each lens in Table 1 is 587.6nm, and the reference wavelength of the effective focal length is 555 nm.
TABLE 1
In the first embodiment, the object-side surface and the image-side surface of any one of the first lens L1 through the sixth lens L6 are aspheric, and the surface shape x of each aspheric lens can be defined by, but is not limited to, the following aspheric formula:
wherein x is the rise of the distance from the aspheric surface vertex to the aspheric surface vertex when the aspheric surface is at the position with the height of h along the optical axis direction; c is the paraxial curvature of the aspheric surface, c being 1/R (i.e., paraxial curvature c is the inverse of radius R of Y in table 1 above); k is a conic coefficient; ai is a correction coefficient corresponding to the i-th high-order term of the aspheric surface. Table 2 shows the high-order term coefficients A4, A6, A8, A10, A12, A14, A16, A18 and A20 that can be used for the respective aspherical mirror surfaces S1-S16 in the first embodiment.
TABLE 2
Referring to fig. 2 (a), fig. 2 (a) shows a light spherical aberration curve of the optical lens 100 in the first embodiment at 435nm, 470nm, 510nm, 555nm, 610nm and 650 nm. In fig. 2 (a), the abscissa in the X-axis direction represents the focus shift, and the ordinate in the Y-axis direction represents the normalized field of view. As can be seen from fig. 2 (a), the spherical aberration value of the optical lens 100 in the first embodiment is better, which illustrates that the imaging quality of the optical lens 100 in this embodiment is better.
Referring to fig. 2 (B), fig. 2 (B) is a diagram of astigmatism of light of the optical lens 100 in the first embodiment at a wavelength of 555 nm. Wherein the abscissa along the X-axis direction represents the focus offset and the ordinate along the Y-axis direction represents the image height in mm. The astigmatism curves represent the meridional image plane curvature T and the sagittal image plane curvature S, and it can be seen from (B) in fig. 2 that the astigmatism of the optical lens 100 is well compensated at this wavelength.
Referring to fig. 2 (C), fig. 2 (C) is a distortion curve diagram of the optical lens 100 in the first embodiment at a wavelength of 555 nm. Wherein the abscissa along the X-axis direction represents distortion and the ordinate along the Y-axis direction represents image height in mm. As can be seen from (C) in fig. 2, the distortion of the optical lens 100 is well corrected at a wavelength of 555 nm.
Second embodiment
Referring to fig. 3, fig. 3 is a schematic structural diagram of an optical lens 100 according to a second embodiment of the present application. The optical lens 100 includes a first lens L1, a second lens L2, a stop 102, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, and a filter L7, which are disposed in this order from the object side to the image side along the optical axis O. For materials of the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5 and the sixth lens L6, reference may be made to the above detailed description, and details are not repeated here.
Further, in the second embodiment, the refractive power of each lens element is different from that of each lens element in the first embodiment in that: the third lens element L3 has negative refractive power. Meanwhile, in the second embodiment, the surface shape of each lens is different from that of each lens in the first embodiment in that: the object-side surface S5 and the image-side surface S6 of the third lens element L3 are convex and concave, respectively, near the optical axis O.
In the second embodiment, the effective focal length f of the optical lens 100 is 3.54mm, the FOV of the field angle of the optical lens 100 is 86.6 °, the total optical length TTL of the optical lens 100 is 4.2mm, and the aperture size FNO is 1.94.
Other parameters in the second embodiment are given in the following table 3, and the definitions of the parameters can be obtained from the description of the foregoing embodiments, which are not repeated herein. It is understood that the units of the radius Y, thickness, and focal length in table 3 are all mm. And the reference wavelength of the refractive index and abbe number of each lens in table 3 is 587.6nm, and the reference wavelength of the effective focal length is 555 nm.
TABLE 3
In the second embodiment, table 4 gives the high-order term coefficients that can be used for each aspherical mirror surface in the second embodiment, wherein each aspherical mirror surface type can be defined by the formula given in the first embodiment.
TABLE 4
Further, referring to fig. 4 (a), a light spherical aberration curve chart of the optical lens 100 in the second embodiment at 435nm, 470nm, 510nm, 555nm, 610nm and 650nm is shown. In fig. 4 (a), the abscissa in the X-axis direction represents the focus shift, and the ordinate in the Y-axis direction represents the normalized field of view. As can be seen from (a) in fig. 4, the spherical aberration value of the optical lens 100 in the second embodiment is better, which indicates that the imaging quality of the optical lens 100 in this embodiment is better.
Referring to fig. 4 (B), fig. 4 (B) is a diagram of astigmatism of the optical lens 100 at a wavelength of 555nm in the second embodiment. Wherein the abscissa along the X-axis direction represents the focus offset and the ordinate along the Y-axis direction represents the image height in mm. The astigmatism curves represent the meridional image plane curvature T and the sagittal image plane curvature S, and as can be seen from (B) in fig. 4, astigmatism of the optical lens 100 is well compensated.
Referring to fig. 4 (C), fig. 4 (C) is a distortion curve diagram of the optical lens 100 in the second embodiment at a wavelength of 555 nm. Wherein the abscissa along the X-axis direction represents distortion and the ordinate along the Y-axis direction represents image height in mm. As can be seen from (C) in fig. 4, the distortion of the optical lens 100 is well corrected at a wavelength of 555 nm.
Third embodiment
Referring to fig. 5, fig. 5 shows a schematic structural diagram of an optical lens 100 according to a third embodiment of the present application. The optical lens 100 includes a first lens L1, a second lens L2, a stop 102, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, and a filter L7, which are disposed in this order from the object side to the image side along the optical axis O. For materials of the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5, and the sixth lens L6, reference may be made to the above-mentioned specific embodiments, and details are not repeated here.
Further, in the third embodiment, the refractive power of each lens element is different from that of each lens element in the first embodiment in that: the fourth lens element L4 has positive refractive power. Meanwhile, in the third embodiment, the surface shape of each lens is different from that of each lens in the first embodiment in that: the object-side surface S5 and the image-side surface S6 of the third lens element L3 are convex and concave, respectively, near the optical axis O.
In the third embodiment, the effective focal length f of the optical lens 100 is 3.5mm, the FOV of the field angle of the optical lens 100 is 87.4 °, the total optical length TTL of the optical lens 100 is 4.24mm, and the aperture size FNO is 1.95.
Other parameters in the third embodiment are shown in the following table 5, and the definitions of the parameters can be obtained from the foregoing description, which is not repeated herein. It is understood that the units of the radius Y, thickness, and focal length in table 5 are mm. The reference wavelength of the refractive index and abbe number of each lens in table 5 was 587.6nm, and the reference wavelength of the effective focal length was 555 nm.
TABLE 5
In the third embodiment, table 6 gives the high-order term coefficients that can be used for each aspherical mirror surface in the third embodiment, wherein each aspherical mirror surface type can be defined by the formula given in the first embodiment.
TABLE 6
Further, referring to fig. 6 (a), a light spherical aberration curve chart of the optical lens 100 in the third embodiment at 435nm, 470nm, 510nm, 555nm, 610nm and 650nm is shown. In fig. 6 (a), the abscissa in the X-axis direction represents the focus shift, and the ordinate in the Y-axis direction represents the normalized field of view. As can be seen from (a) in fig. 6, the spherical aberration value of the optical lens 100 in the third embodiment is better, which indicates that the imaging quality of the optical lens 100 in this embodiment is better.
Referring to fig. 6 (B), fig. 6 (B) is a diagram of astigmatism of the optical lens 100 at a wavelength of 555nm in the third embodiment. Wherein the abscissa along the X-axis direction represents the focus offset and the ordinate along the Y-axis direction represents the image height in mm. The astigmatism curves represent the meridional image plane curvature T and the sagittal image plane curvature S, and as can be seen from (B) in fig. 6, astigmatism of the optical lens 100 is well compensated.
Referring to fig. 6 (C), fig. 6 (C) is a distortion curve diagram of the optical lens 100 in the third embodiment at a wavelength of 555 nm. Wherein the abscissa along the X-axis direction represents distortion and the ordinate along the Y-axis direction represents image height in mm. As can be seen from (C) in fig. 6, the distortion of the optical lens 100 is well corrected at a wavelength of 555 nm.
Fourth embodiment
Fig. 7 is a schematic structural diagram of an optical lens 100 according to a fourth embodiment of the present disclosure. The optical lens 100 includes a first lens L1, a second lens L2, a stop 102, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, and a filter L7, which are disposed in this order from the object side to the image side along the optical axis O. For materials of the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5, and the sixth lens L6, reference may be made to the above-mentioned specific embodiments, and details are not repeated here.
Further, in the fourth embodiment, the refractive power of each lens element differs from that of each lens element in the first embodiment in that: the fifth lens element L5 has positive refractive power. Meanwhile, in the fourth embodiment, the surface shape of each lens is different from that of each lens in the first embodiment in that: the object-side surface S5 and the image-side surface S6 of the third lens element L3 are respectively convex and concave at the paraxial region O, and the object-side surface S7 and the image-side surface S8 of the fourth lens element L4 are respectively concave and convex at the paraxial region O.
In the fourth embodiment, the focal length f of the optical lens 100 is 3.58mm, the FOV of the field angle of the optical lens 100 is 86 °, the total optical length TTL of the optical lens 100 is 4.3mm, and the aperture size FNO is 1.94.
Other parameters in the fourth embodiment are shown in the following table 7, and the definitions of the parameters can be obtained from the foregoing description, which is not repeated herein. It is understood that the units of the radius Y, thickness, and focal length in table 7 are mm. In table 7, the reference wavelength of the refractive index and abbe number of each lens is 587.6nm, and the reference wavelength of the effective focal length is 555 nm.
TABLE 7
In the fourth embodiment, table 8 gives high-order term coefficients that can be used for each aspherical mirror in the fourth embodiment, wherein each aspherical mirror type can be defined by the formula given in the first embodiment.
TABLE 8
Further, referring to fig. 8 (a), a light spherical aberration curve chart of the optical lens 100 in the fourth embodiment at 435nm, 470nm, 510nm, 555nm, 610nm and 650nm is shown. In fig. 8 (a), the abscissa in the X-axis direction represents the focus shift, and the ordinate in the Y-axis direction represents the normalized field of view. As can be seen from (a) in fig. 8, the spherical aberration value of the optical lens 100 in the fourth embodiment is better, which illustrates that the imaging quality of the optical lens 100 in this embodiment is better.
Referring to fig. 8 (B), fig. 8 (B) is a diagram of astigmatism of light of the optical lens 100 in the fourth embodiment at a wavelength of 555 nm. Wherein the abscissa along the X-axis direction represents the focus offset and the ordinate along the Y-axis direction represents the image height in mm. The astigmatism curves represent the meridional image plane curvature T and the sagittal image plane curvature S, and it can be seen from (B) in fig. 8 that the astigmatism of the optical lens 100 is well compensated.
Referring to fig. 8 (C), fig. 8 (C) is a distortion curve diagram of the optical lens 100 in the fourth embodiment at a wavelength of 555 nm. Wherein the abscissa along the X-axis direction represents distortion and the ordinate along the Y-axis direction represents image height in mm. As can be seen from (C) in fig. 8, the distortion of the optical lens 100 is well corrected at a wavelength of 555 nm.
Fifth embodiment
Fig. 9 is a schematic structural diagram of an optical lens 100 according to a fifth embodiment of the present application. The optical lens 100 includes a first lens L1, a second lens L2, a stop 102, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, and a filter L7, which are disposed in this order from the object side to the image side along the optical axis O. For materials of the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5 and the sixth lens L6, reference may be made to the above detailed description, and details are not repeated here.
Further, the refractive powers of the first lens element L1, the second lens element L2, the third lens element L3, the fourth lens element L4, the fifth lens element L5 and the sixth lens element L6 can be found in the description of the first embodiment, and are not repeated herein. Meanwhile, in the fifth embodiment, the surface shape of each lens is different from that of each lens in the first embodiment in that: the object-side surface S5 and the image-side surface S6 of the third lens element L3 are convex and concave, respectively, at the paraxial region O.
In the fifth embodiment, the focal length f of the optical lens 100 is 3.52mm, the FOV of the field angle of the optical lens 100 is 87 °, the total optical length TTL of the optical lens 100 is 4.25mm, and the aperture size FNO is 1.89.
Other parameters in the fifth embodiment are given in the following table 9, and the definitions of the parameters can be obtained from the foregoing description, which is not repeated herein. It is understood that the units of the radius Y, thickness, and focal length in table 9 are mm. In Table 9, the reference wavelength of the refractive index and Abbe number of each lens is 587.6nm, and the reference wavelength of the effective focal length is 555 nm.
TABLE 9
In the fourth embodiment, table 10 gives the high-order term coefficients that can be used for each aspherical mirror surface in the fifth embodiment, wherein each aspherical mirror surface type can be defined by the formula given in the first embodiment.
Further, referring to fig. 10 (a), a light spherical aberration curve of the optical lens 100 in the fifth embodiment at 435nm, 470nm, 510nm, 555nm, 610nm and 650nm is shown. In fig. 10 (a), the abscissa in the X-axis direction represents the focus shift, and the ordinate in the Y-axis direction represents the normalized field of view. As can be seen from (a) in fig. 10, the spherical aberration value of the optical lens 100 in the fifth embodiment is better, which illustrates that the imaging quality of the optical lens 100 in this embodiment is better.
Referring to fig. 10 (B), fig. 10 (B) is a diagram of astigmatism of light of the optical lens 100 in the fifth embodiment at a wavelength of 555 nm. Wherein the abscissa along the X-axis direction represents the focus offset and the ordinate along the Y-axis direction represents the image height in mm. The astigmatism curves represent the meridional image plane curvature T and the sagittal image plane curvature S, and it can be seen from (B) in fig. 10 that the astigmatism of the optical lens 100 is well compensated.
Referring to fig. 10 (C), fig. 10 (C) is a distortion curve diagram of the optical lens 100 in the fifth embodiment at a wavelength of 555 nm. Wherein the abscissa along the X-axis direction represents distortion and the ordinate along the Y-axis direction represents image height in mm. As can be seen from (C) in fig. 10, the distortion of the optical lens 100 is well corrected at a wavelength of 555 nm.
Sixth embodiment
Fig. 11 is a schematic structural diagram of an optical lens 100 according to a fifth embodiment of the present application. The optical lens 100 includes a first lens L1, a second lens L2, a stop 102, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, and a filter L7, which are disposed in this order from the object side to the image side along the optical axis O. For materials of the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5, and the sixth lens L6, reference may be made to the above-mentioned specific embodiments, and details are not repeated here.
Further, the refractive powers of the first lens element L1, the second lens element L2, the third lens element L3, the fourth lens element L4, the fifth lens element L5 and the sixth lens element L6 can be found in the description of the first embodiment, and are not repeated herein. Meanwhile, in the fifth embodiment, the surface shape of each lens is different from that of each lens in the first embodiment in that: the object-side surface S5 and the image-side surface S6 of the third lens element L3 are concave and convex, respectively, at the paraxial region O.
In the sixth embodiment, the focal length f of the optical lens 100 is 3.5mm, the FOV of the field angle of the optical lens 100 is 87.4 °, the total optical length TTL of the optical lens 100 is 4.2mm, and the aperture size FNO is 1.97.
Other parameters in the sixth embodiment are given in the following table 11, and the definitions of the parameters can be obtained from the foregoing description, which is not repeated herein. It is understood that the units of Y radius, thickness, and focal length in table 11 are mm. The reference wavelength of refractive index and Abbe number of each lens in Table 11 was 587.6nm, and the reference wavelength of effective focal length was 555 nm.
TABLE 11
In the sixth embodiment, table 12 gives the high-order term coefficients that can be used for each aspherical mirror surface in the sixth embodiment, wherein each aspherical mirror surface type can be defined by the formula given in the first embodiment.
TABLE 12
Further, referring to fig. 12 (a), a light spherical aberration curve of the optical lens 100 in the fifth embodiment at 435nm, 470nm, 510nm, 555nm, 610nm and 650nm is shown. In fig. 12 (a), the abscissa in the X-axis direction represents the focus shift, and the ordinate in the Y-axis direction represents the normalized field of view. As can be seen from (a) in fig. 10, the spherical aberration value of the optical lens 100 in the fifth embodiment is better, which indicates that the imaging quality of the optical lens 100 in this embodiment is better.
Referring to fig. 12 (B), fig. 10 (B) is a diagram of astigmatism of light of the optical lens 100 in the fifth embodiment at a wavelength of 555 nm. Wherein the abscissa along the X-axis direction represents the focus offset and the ordinate along the Y-axis direction represents the image height in mm. The astigmatism curves represent the meridional image plane curvature T and the sagittal image plane curvature S, and it can be seen from (B) in fig. 12 that the astigmatism of the optical lens 100 is well compensated.
Referring to fig. 12 (C), fig. 10 (C) is a distortion curve diagram of the optical lens 100 in the fifth embodiment at a wavelength of 555 nm. Wherein the abscissa along the X-axis direction represents distortion and the ordinate along the Y-axis direction represents image height in mm. As can be seen from (C) in fig. 12, the distortion of the optical lens 100 is well corrected at a wavelength of 555 nm.
Referring to table 13, table 13 summarizes ratios of the relations in the first embodiment to the sixth embodiment of the present application.
Watch 13
Referring to fig. 13, the present application further discloses a camera module 200, which includes a photo sensor 201 and the optical lens 100 according to any of the first to sixth embodiments, wherein the photo sensor 201 is disposed at an image side of the optical lens 100. The optical lens 100 may be configured to receive a light signal of a subject and project the light signal to the light sensing chip 201, and the light sensing chip 201 may be configured to convert the light signal corresponding to the subject into an image signal. And will not be described in detail herein. It can be understood that the camera module 200 having the optical lens 100 can satisfy the light, thin and miniaturized design of the optical lens 100, and is beneficial to making the camera module have the characteristic of a large image plane, improving the texture of pictures, and improving the resolution and the imaging definition. Simultaneously still be favorable to making optical lens has the characteristics of large aperture, has bigger light inlet quantity, can improve the dim light and shoot the condition to can effectively promote the module of making a video recording and shoot the quality under the dim light environment, be favorable to being applicable to dark light environment such as night scene, rainy day, starry sky and shoot. . Since the above technical effects have been described in detail in the embodiments of the optical lens 100, they are not described herein again.
Referring to fig. 14, the present application further discloses an electronic device, wherein the electronic device 300 includes a housing 301 and the camera module 200 as described above, and the camera module 200 is disposed on the housing 301 to obtain image information. The electronic device 300 may be, but is not limited to, a mobile phone, a tablet computer, a notebook computer, a smart watch, a monitor, and the like. It can be understood that the electronic device 300 having the camera module 200 also has all the technical effects of the optical lens 100. That is, the electronic device 300 can satisfy the light, thin and miniaturized design of the optical lens 100, and also can satisfy the light, thin and miniaturized design of the optical lens, which is beneficial to the camera module having the characteristic of a large image plane, improving the texture of the picture, and improving the resolution and the imaging definition. Simultaneously still be favorable to making optical lens has the characteristics of large aperture, has bigger light inlet quantity, can improve the dim light and shoot the condition to can effectively promote the module of making a video recording and shoot the quality under the dim light environment, be favorable to being applicable to dark light environment such as night scene, rainy day, starry sky and shoot. Since the above technical effects have been described in detail in the embodiments of the optical lens 100, they are not described herein again.
The optical lens, the camera module and the electronic device disclosed in the embodiments of the present invention are described in detail above, and specific examples are applied herein to explain the principles and embodiments of the present invention, and the description of the embodiments above is only used to help understanding the optical lens, the camera module and the electronic device and their core ideas of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
Claims (10)
1. An optical lens includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens, which are arranged in order from an object side to an image side along an optical axis;
the first lens element with positive refractive power has a convex object-side surface at a paraxial region thereof and a concave image-side surface at a paraxial region thereof;
the second lens element with negative refractive power has a convex object-side surface at paraxial region and a concave image-side surface at paraxial region;
the third lens element with refractive power;
the fourth lens element with refractive power;
the fifth lens element with refractive power;
the sixth lens element with negative refractive power has a concave image-side surface at a paraxial region;
the lens with refractive power of the optical lens is the six lenses;
the optical lens satisfies the following relation:
1.3mm<Imgh^2/TTL/Fno<1.42mm；
TTL/Imgh<1.3；
wherein, TTL is a distance on the optical axis from the object side surface of the first lens element to the imaging surface of the optical lens, Imgh is a half of a diagonal length of an effective pixel area on the imaging surface of the optical lens, and Fno is an f-number of the optical lens.
2. An optical lens according to claim 1, wherein the optical lens satisfies the following relation:
0.3<|f2/f6|<5；
wherein f2 is the effective focal length of the second lens, and f6 is the effective focal length of the sixth lens.
3. An optical lens according to claim 1, characterized in that the optical lens satisfies the following relation:
Fno<2.0。
4. an optical lens according to claim 1, wherein the optical lens satisfies the following relation:
0.1<D5/CT6<0.7；
wherein D5 is an air gap between the fourth lens element and the fifth lens element on the optical axis, and CT6 is a thickness of the sixth lens element on the optical axis.
5. An optical lens according to claim 1, wherein the optical lens satisfies the following relation:
1.5<R4/R5<5；
wherein R4 is a radius of curvature of an object-side surface of the second lens at the optical axis, and R5 is a radius of curvature of an image-side surface of the second lens at the optical axis.
6. An optical lens according to claim 1, characterized in that the optical lens satisfies the following relation:
0.3<SAG51/CT5<1.0；
SAG51 is the distance from the intersection point of the object side surface of the fifth lens and the optical axis to the maximum effective radius of the object side surface of the fifth lens on the optical axis, and CT5 is the thickness of the fifth lens on the optical axis.
7. An optical lens according to claim 1, wherein the optical lens satisfies the following relation:
2<(R12+R13)/(R12-R13)<7；
wherein R12 is a radius of curvature of an object-side surface of the sixth lens element at the optical axis, and R13 is a radius of curvature of an image-side surface of the sixth lens element at the optical axis.
8. An optical lens according to claim 1, characterized in that the optical lens satisfies the following relation:
0.2<f6/(f1+f2)<3；
wherein f1 is the effective focal length of the first lens, f2 is the effective focal length of the second lens, and f6 is the effective focal length of the sixth lens.
9. A camera module, comprising the optical lens of any one of claims 1 to 8 and a photosensitive chip, wherein the photosensitive chip is disposed on an image side of the optical lens.
10. An electronic device, comprising a housing and the camera module of claim 9, wherein the camera module is disposed in the housing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110615010.6A CN113391433B (en) | 2021-06-02 | 2021-06-02 | Optical lens, camera module and electronic equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110615010.6A CN113391433B (en) | 2021-06-02 | 2021-06-02 | Optical lens, camera module and electronic equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113391433A CN113391433A (en) | 2021-09-14 |
| CN113391433B true CN113391433B (en) | 2022-08-30 |
Family
ID=77619936
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110615010.6A Active CN113391433B (en) | 2021-06-02 | 2021-06-02 | Optical lens, camera module and electronic equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113391433B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113960759B (en) * | 2021-11-05 | 2023-07-04 | 江西晶超光学有限公司 | Optical lens, camera module and electronic equipment |
| CN114114618B (en) * | 2021-11-15 | 2023-09-05 | 江西晶超光学有限公司 | Optical lens, camera module and electronic equipment |
| CN113791488B (en) * | 2021-11-15 | 2022-03-11 | 江西晶超光学有限公司 | Optical lens, camera module and electronic equipment |
| CN116500760B (en) * | 2023-06-27 | 2023-09-19 | 江西欧菲光学有限公司 | Optical lens, camera module and electronic equipment |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107219613A (en) * | 2017-07-31 | 2017-09-29 | 浙江舜宇光学有限公司 | Optical imaging lens |
| CN108254855A (en) * | 2016-12-28 | 2018-07-06 | 三星电机株式会社 | Optical imaging system |
| CN110221413A (en) * | 2019-06-30 | 2019-09-10 | 瑞声科技(新加坡)有限公司 | Camera optical camera lens |
| CN111308655A (en) * | 2018-12-26 | 2020-06-19 | 浙江舜宇光学有限公司 | Optical imaging lens |
| JP2022022633A (en) * | 2020-06-30 | 2022-02-07 | 東京晨美光学電子株式会社 | Image capturing lens |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6191820B2 (en) * | 2013-10-04 | 2017-09-06 | コニカミノルタ株式会社 | Imaging lens, imaging device, and portable terminal |
| JP5894696B1 (en) * | 2015-05-28 | 2016-03-30 | エーエーシーアコースティックテクノロジーズ（シンセン）カンパニーリミテッドＡＡＣ Ａｃｏｕｓｔｉｃ Ｔｅｃｈｎｏｌｏｇｉｅｓ（Ｓｈｅｎｚｈｅｎ）Ｃｏ．，Ｌｔｄ | Imaging lens |
| WO2017195503A1 (en) * | 2016-05-13 | 2017-11-16 | シャープ株式会社 | Imaging lens |
| JP6014783B1 (en) * | 2016-07-19 | 2016-10-25 | エーエーシー テクノロジーズ ピーティーイー リミテッドＡａｃ Ｔｅｃｈｎｏｌｏｇｉｅｓ Ｐｔｅ．Ｌｔｄ． | Imaging lens |
| WO2018153012A1 (en) * | 2017-02-23 | 2018-08-30 | 浙江舜宇光学有限公司 | Camera lens |
| JP6529616B1 (en) * | 2017-11-18 | 2019-06-12 | エーエーシー テクノロジーズ ピーティーイー リミテッドＡａｃ Ｔｅｃｈｎｏｌｏｇｉｅｓ Ｐｔｅ．Ｌｔｄ． | Shooting optical lens |
| CN109656005A (en) * | 2018-05-04 | 2019-04-19 | 浙江舜宇光学有限公司 | Optical imaging lens |
| CN111781706A (en) * | 2020-08-05 | 2020-10-16 | 惠州萨至德光电科技有限公司 | Large-aperture high-pixel ultrathin imaging lens |
| CN112099189B (en) * | 2020-09-10 | 2022-08-30 | 江西晶超光学有限公司 | Optical lens, camera module and electronic equipment |
| CN113391430B (en) * | 2021-05-26 | 2024-01-09 | 江西欧菲光学有限公司 | Optical system, lens module and electronic equipment |
-
2021
- 2021-06-02 CN CN202110615010.6A patent/CN113391433B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108254855A (en) * | 2016-12-28 | 2018-07-06 | 三星电机株式会社 | Optical imaging system |
| CN107219613A (en) * | 2017-07-31 | 2017-09-29 | 浙江舜宇光学有限公司 | Optical imaging lens |
| CN111308655A (en) * | 2018-12-26 | 2020-06-19 | 浙江舜宇光学有限公司 | Optical imaging lens |
| CN110221413A (en) * | 2019-06-30 | 2019-09-10 | 瑞声科技(新加坡)有限公司 | Camera optical camera lens |
| JP2022022633A (en) * | 2020-06-30 | 2022-02-07 | 東京晨美光学電子株式会社 | Image capturing lens |
Non-Patent Citations (1)
| Title |
|---|
| 800万像素手机镜头的设计;李广等;《应用光学》;20110515;第32卷(第03期);420-425 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113391433A (en) | 2021-09-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113391433B (en) | Optical lens, camera module and electronic equipment | |
| CN113534407B (en) | Optical lens, camera module and electronic equipment | |
| CN113933968A (en) | Optical lens, camera module and electronic equipment | |
| CN113552697A (en) | Optical lens, camera module and electronic equipment | |
| CN111239971A (en) | Optical system, camera module and electronic device | |
| CN113741006A (en) | Optical lens, camera module and electronic equipment | |
| CN211786312U (en) | Optical system, camera module and electronic device | |
| CN113946038B (en) | Optical lens, camera module and electronic equipment | |
| CN113687499B (en) | Optical system, lens module and electronic equipment | |
| CN113050256B (en) | Optical lens, camera module, electronic equipment and automobile | |
| CN113156612B (en) | Optical system, image capturing module and electronic equipment | |
| CN211577551U (en) | Optical system, camera module and electronic device | |
| CN114721126B (en) | Optical lens, camera module and electronic equipment | |
| CN114578525B (en) | Optical system, lens module and electronic equipment | |
| CN113933969B (en) | Optical lens, camera module and electronic equipment | |
| CN113960759B (en) | Optical lens, camera module and electronic equipment | |
| CN114326052B (en) | Optical system, image capturing module and electronic equipment | |
| CN113484985B (en) | Optical lens, camera module and electronic equipment | |
| CN113568142B (en) | Optical lens, camera module and electronic equipment | |
| CN113933966B (en) | Optical lens, camera module and electronic equipment | |
| CN113866940B (en) | Optical system, camera module and electronic equipment | |
| CN214474193U (en) | Optical system, camera module and electronic equipment | |
| CN114509862A (en) | Optical system, camera module and electronic equipment | |
| CN114153050A (en) | Optical system, image capturing module with same and electronic device | |
| CN113703132A (en) | Optical system, lens module and electronic equipment |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |