CN111983784A - Optical lens group, camera module and electronic equipment - Google Patents
Optical lens group, camera module and electronic equipment Download PDFInfo
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- CN111983784A CN111983784A CN202010951762.5A CN202010951762A CN111983784A CN 111983784 A CN111983784 A CN 111983784A CN 202010951762 A CN202010951762 A CN 202010951762A CN 111983784 A CN111983784 A CN 111983784A
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
- G02B13/0015—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design
- G02B13/002—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface
- G02B13/0045—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface having five or more lenses
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/06—Panoramic objectives; So-called "sky lenses" including panoramic objectives having reflecting surfaces
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/18—Optical objectives specially designed for the purposes specified below with lenses having one or more non-spherical faces, e.g. for reducing geometrical aberration
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Abstract
The embodiment of the application discloses an optical lens group, a camera module and electronic equipment, wherein the optical lens group comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens which are sequentially arranged from an object plane to an image plane along an optical axis; the first lens element with negative refractive power and the second lens element with positive refractive power; the third lens element with negative refractive power; the distance between the object side surface of the first lens and the image surface on the optical axis is TTL, half of the image height corresponding to the maximum field angle of the optical lens group is imgH, and the TTL and the imgH satisfy the following conditional expression: TTL/ImgH < 1.9. Based on this application embodiment's optical lens group, the camera module that forms by it possesses wide angle of view, clear bright imaging effect and miniaturized characteristics, and use prospect is wide. The optical lens group according to the embodiment of the present application is particularly suitable for information terminal devices such as smart phones, mobile phones, PDAs, game machines, and PCs, home appliances to which a camera function is added, and the like, which are being miniaturized.
Description
Technical Field
The application relates to the technical field of optical imaging, in particular to an optical lens group, a camera module and electronic equipment.
Background
In recent years, with the spread of electronic apparatuses, higher demands have been made on an image pickup function of an electronic apparatus. For example, it is desirable that the imaging function of the electronic apparatus has a brighter and clearer imaging effect. In the related art, the imaging quality of the electronic device is generally improved by increasing the size of the photosensitive element to increase the number of pixels, but this increases the size of the electronic device, which is not favorable for the electronic device to be light and thin.
Disclosure of Invention
The embodiment of the application provides an optical lens group, a camera module and electronic equipment, which can improve the imaging quality while realizing the lightness and thinness of the electronic equipment. The technical scheme is as follows;
in a first aspect, an embodiment of the present application provides an optical lens group, including a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens, which are sequentially disposed along an optical axis from an object plane to an image plane;
the first lens element with negative refractive power has a positive curvature radius of an object-side surface thereof on the optical axis and a positive curvature radius of an image-side surface thereof on the optical axis;
the second lens element with positive refractive power;
the third lens element with negative refractive power;
the distance between the object side surface of the first lens and the image surface on the optical axis is TTL, half of the image height corresponding to the maximum field angle of the optical lens group is ImgH, and the TTL and the ImgH satisfy the following conditional expression:
TTL/ImgH<1.9。
based on this application embodiment's optical lens group, the camera module that forms by it possesses wide angle of view, clear bright imaging effect and miniaturized characteristics, and use prospect is wide. The optical lens group according to the embodiment of the present invention is particularly suitable for use in information terminal devices such as smart phones, mobile phones, PDAs (Personal Digital assistants), game machines, PCs, and home electric appliances with an additional camera function, which are being miniaturized. In the embodiment of the present application, a distance TTL between an object side surface of the first lens element and an image plane on an optical axis and a half ImgH of an image height corresponding to a maximum field angle of the optical lens group are defined as satisfying: TTL/ImgH <1.9, and the size of the optical lens group can be smaller, so that the formed electronic equipment can be light and thin, and the imaging quality can be ensured.
In some embodiments, the focal length of the optical lens group is f, and f and TTL satisfy the following conditional expressions:
2<TTL/f<3.5。
based on the above embodiment, the total length of the optical lens group can be effectively shortened, so that the formed electronic device can be light and thin, and the focal length of the optical lens group can meet the requirement of a wide field angle.
In some of these embodiments, the radius of curvature of the object-side surface of the second lens at the optical axis is positive and the radius of curvature of the image-side surface of the second lens at the optical axis is negative.
Based on the above embodiment, the shape of the object-side surface of the second lens element at the optical axis is designed to be convex, and the shape of the image-side surface of the second lens element at the optical axis is designed to be convex, which is beneficial for converging light rays collected by the optical lens assembly.
In some of these embodiments, the radius of curvature of the object-side surface of the fifth lens at the optical axis is positive and the radius of curvature of the image-side surface of the fifth lens at the optical axis is negative.
Based on the above embodiment, the shape of the object-side surface of the fifth lens element at the optical axis is designed to be convex, and the shape of the image-side surface of the fifth lens element at the optical axis is designed to be convex, so that the optical lens assembly is favorable for receiving the light of the previous lens element, and the incident angle of the light is controlled to avoid total reflection.
In some embodiments, a radius of curvature of an object-side surface of the sixth lens element at the optical axis is positive, and a radius of curvature of an image-side surface of the sixth lens element at the optical axis is positive.
Based on the above embodiments, the shape of the object-side surface of the sixth lens element at the optical axis is designed to be convex, and the shape of the image-side surface of the sixth lens element at the optical axis is designed to be concave, which is beneficial to the optical lens assembly to eliminate aberration.
In some embodiments, the f-number of the optical lens group is FNO, and FNO satisfies the following conditional expression:
1.8≤FNO≤2.0。
based on above-mentioned embodiment, through the f-number FNO with optical lens group inject between 1.8 to 2.0, can make optical lens group possess the characteristics of large aperture, can realize clear bright imaging.
In some embodiments, the maximum field angle of the optical lens group is FOV, and the FOV satisfies the following conditional expression:
FOV≥100°。
based on the embodiment, the maximum field angle of the optical lens group is limited to be larger than 100 degrees, a wide field angle can be realized, so that the shooting and viewing capacity is enhanced, more scenes seen by human eyes can be restored in a short distance range, and the user experience is improved.
In some of these embodiments, the second lens has a focal length f2The focal length of the optical lens group is f, f2And f satisfies the following conditional expressions:
0.8<f2/f<1.5。
based on the above embodiment, by changing the focal length f of the second lens2The focal length f with the optical lens group is defined to satisfy: 0.8<f2/f<1.5, the second lens can provide enough positive focal power, thereby shortening the total length of the optical lens group.
In some of these embodiments, the first lens has a focal length f1The focal length of the optical lens group is f, f1And f satisfies the following conditional expressions:
f/f1>-1。
based on the above embodiment, by changing the focal length f of the first lens1The focal length f with the optical lens group is defined to satisfy: f/f1>-1, enabling the first lens to provide a negative power, facilitating a wide field of view. Meanwhile, in the embodiment of the application, the shape of the object side surface of the first lens at the optical axis is designed to be a convex surface, and the shape of the image side surface of the first lens at the optical axis is designed to be a concave surface, so that peripheral field distortion can be inhibited, and the peripheral field distortion is prevented from being excessively increased.
In some embodiments, the half of the maximum field angle of the optical lens group is ω, and the curvature radius of the image-side surface of the sixth lens element at the optical axis is RS12ω andRS12the following conditional expressions are satisfied:
2mm-1<tanω/RS12<4mm-1。
based on the above embodiment, the curvature radius R of the image side surface of the sixth lens element at the optical axis is obtained by combining a half ω of the maximum field angle of the optical lens group with the half ωS12Is defined to satisfy: 2mm-1<tanω/RS12<4mm-1The field curvature can be corrected well from the central view angle to the peripheral view angle, and the wide angle can be realized. If tan omega/RS12≥4mm-1The curvature radius of the image side surface of the sixth lens element closest to the image plane as the optical lens group at the optical axis is too small, and excessive aberration correction can be suppressed particularly at the peripheral angle of view; if tan omega/RS12≤2mm-1The curvature radius of the image side surface of the sixth lens at the optical axis is too large, which is not favorable for the compression of the total length of the optical system.
In some embodiments, the minimum distance on the optical axis from the image side surface of the sixth lens to the image plane is BF, and BF satisfies the following conditional expression:
BF≥0.77mm。
based on the above-described embodiment, by defining the minimum distance BF on the optical axis from the image-side surface of the sixth lens to the image surface to satisfy: BF is more than or equal to 0.77mm, enough focusing range can be guaranteed, the overlarge angle of light incidence on an image surface is restrained, and therefore the optical lens group is matched with the photosensitive element.
In some of these embodiments, the third lens has an Abbe number v3，v3The following conditional expressions are satisfied:
v3<30。
based on the above embodiment, by changing the Abbe number v of the third lens3The third lens element is limited to be less than 30, so that the third lens element can be made of a high-scattering material, which is helpful for enhancing the deflection degree of the emergent light, thereby achieving the same refraction effect in a smaller space, being beneficial to shortening the total length of the optical lens group, having strong chromatic aberration correction capability, and improving the resolution of the lens.
In a second aspect, an embodiment of the present application provides a camera module, including:
the image sensor is arranged at the image side of the optical lens group.
The camera module based on the embodiment of the application has the characteristics of wide field angle, clear and bright imaging effect and miniaturization, and has a wide application prospect. The camera module according to the embodiment of the present invention is particularly suitable for use in information terminal devices such as smartphones, mobile phones, PDAs (Personal Digital assistants), game machines, PCs, and home electric appliances to which a camera function is added, which are being downsized.
In a third aspect, an embodiment of the present application provides an electronic device, including:
a housing; and
the camera module is arranged on the shell.
According to the electronic equipment based on the embodiment of the application, the camera shooting function of the electronic equipment has the characteristics of wide field angle, clear and bright imaging effect and miniaturization, and the application prospect is wide.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an optical lens assembly according to an embodiment of the present disclosure;
fig. 2 is a longitudinal spherical aberration curve, an astigmatism curve and a distortion curve of the optical lens assembly according to an embodiment of the present application;
fig. 3 is a schematic structural diagram of an optical lens assembly provided in the second embodiment of the present application;
fig. 4 is a longitudinal spherical aberration curve, an astigmatism curve and a distortion curve of the optical lens assembly according to the second embodiment of the present application;
fig. 5 is a schematic structural diagram of an optical lens assembly provided in the third embodiment of the present application;
fig. 6 is a longitudinal spherical aberration curve, an astigmatism curve and a distortion curve of the optical lens assembly provided in the third embodiment of the present application;
fig. 7 is a schematic structural diagram of an optical lens assembly provided in the fourth embodiment of the present application;
fig. 8 is a longitudinal spherical aberration curve, an astigmatism curve and a distortion curve of the optical lens assembly provided in the fourth embodiment of the present application;
fig. 9 is a schematic structural diagram of an optical lens assembly provided in the fifth embodiment of the present application;
fig. 10 is a longitudinal spherical aberration curve, an astigmatism curve and a distortion curve of the optical lens assembly provided in the fifth embodiment of the present application;
fig. 11 is a schematic structural diagram of an optical lens assembly according to a sixth embodiment of the present application;
fig. 12 is a longitudinal spherical aberration curve, an astigmatism curve and a distortion curve of an optical lens assembly provided in the sixth embodiment of the present application;
fig. 13 is a schematic structural diagram of an optical lens assembly provided in a seventh embodiment of the present application;
fig. 14 is a longitudinal spherical aberration curve, an astigmatism curve and a distortion curve of the optical lens assembly provided in the seventh embodiment of the present application;
fig. 15 is a schematic structural diagram of an optical lens assembly according to an eighth embodiment of the present application;
fig. 16 is a longitudinal spherical aberration curve, an astigmatism curve and a distortion curve of the optical lens assembly according to the eighth embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more clear, embodiments of the present application will be described in further detail below with reference to the accompanying drawings.
When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the application, as detailed in the appended claims.
In recent years, with the spread of electronic apparatuses, higher demands have been made on an image pickup function of an electronic apparatus. For example, it is desirable that the imaging function of the electronic apparatus has a brighter and clearer imaging effect. In the related art, the imaging quality of the electronic device is generally improved by increasing the size of the photosensitive element to increase the number of pixels, but this increases the size of the electronic device, which is not favorable for the electronic device to be light and thin. Based on this, the embodiment of the application provides an optical lens group, a camera module and an electronic device, and aims to solve the technical problems.
In a first aspect, an embodiment of the present application provides an optical lens group. The optical lens group comprises a first lens 110, a second lens 120, a third lens 130, a fourth lens 140, a fifth lens 150 and a sixth lens 160 which are arranged in sequence from an object plane to an image plane along an optical axis. The first lens element 110 with negative refractive power has a positive curvature radius of an object-side surface of the first lens element 110 on the optical axis, and a positive curvature radius of an image-side surface of the first lens element 110 on the optical axis; the second lens element 120 with positive refractive power; the third lens element 130 with negative refractive power; the distance on the optical axis from the object-side surface of the first lens element 110 to the image plane is TTL, half of the image height corresponding to the maximum field angle of the optical lens assembly is ImgH, and TTL and ImgH satisfy the following conditional expressions: TTL/ImgH < 1.9.
Based on this application embodiment's optical lens group, the camera module that forms by it possesses wide angle of view, clear bright imaging effect and miniaturized characteristics, and use prospect is wide. The optical lens group according to the embodiment of the present invention is particularly suitable for use in information terminal devices such as smart phones, mobile phones, PDAs (Personal Digital assistants), game machines, PCs, and home electric appliances with an additional camera function, which are being miniaturized. In the embodiment of the present application, a distance TTL between an object side surface of the first lens element 110 and an image surface on an optical axis and a half ImgH of an image height corresponding to a maximum field angle of the optical lens assembly are defined to satisfy:
TTL/ImgH <1.9, and the size of the optical lens group can be smaller, so that the formed electronic equipment can be light and thin, and the imaging quality can be ensured.
The first lens 110 has a focal length f1The focal length of the optical lens group is f, f1And f may satisfy the following conditional expressions: f/f1>-1. By focusing the focal length f of the first lens 1101The focal length f of the optical lens group is limited to be larger than-1, so that the first lens 110 can provide negative focal power, and wide field angle is realized. Meanwhile, the shape of the object side surface of the first lens 110 at the optical axis is designed to be convex, and the shape of the image side surface of the first lens 110 at the optical axis is designed to be concave, so that peripheral field distortion can be inhibited, and the peripheral field distortion can be prevented from being excessively increased.
The curvature radius of the object-side surface of the second lens element 120 at the optical axis may be positive, and the curvature radius of the image-side surface of the second lens element 120 at the optical axis may be negative, so that the shape of the object-side surface of the second lens element 120 at the optical axis is designed to be a convex surface, and the shape of the image-side surface of the second lens element 120 at the optical axis is designed to be a convex surface, which is beneficial for converging the light collected by the optical lens assembly. The second lens 120 has a focal length f2The focal length of the optical lens group is f, f2And f may satisfy the following conditional expressions: 0.8<f2/f<1.5. By changing the focal length f of the second lens 1202The focal length f of the optical lens group is limited to 0.8 to 1.5, so that the second lens element 120 can provide sufficient positive power to shorten the total length of the optical lens group.
Abbe number v of the third lens 1303The following conditional expressions may be satisfied: v. of3<30, abbe number v of the third lens 1303The limitation is less than 30, so that the third lens element 130 can be made of a high-scattering material, which is helpful for enhancing the deflection degree of the emergent light, and thus the same refraction effect can be achieved in a smaller space, which is beneficial for reducing the total length of the optical lens assembly, and meanwhile, the chromatic aberration correction capability is strong, and the lens resolution can be improved.
The curvature radius of the object-side surface of the fifth lens element 150 at the optical axis may be positive, and the curvature radius of the image-side surface of the fifth lens element 150 at the optical axis may be negative, so that the shape of the object-side surface of the fifth lens element 150 at the optical axis is designed to be a convex surface, and the shape of the image-side surface of the fifth lens element 150 at the optical axis is designed to be a convex surface, which is beneficial for the optical lens assembly to receive the light of the previous lens element and control the incident angle of the light.
The curvature radius of the object-side surface of the sixth lens element 160 at the optical axis is positive, and the curvature radius of the image-side surface of the sixth lens element 160 at the optical axis is positive. The object-side surface of the sixth lens element 160 is designed to be convex and the image-side surface of the sixth lens element 160 is designed to be concave, which is beneficial to eliminating aberration. The minimum distance between the image side surface of the sixth lens element 160 and the image plane on the optical axis is BF, which may satisfy the following conditional expression: BF is larger than or equal to 0.77mm, the minimum distance BF on the optical axis from the image side surface of the sixth lens element 160 to the image surface is limited to be larger than 0.77mm, a sufficient focusing range can be ensured, and an overlarge angle of light incidence to the image surface is restrained, so that the optical lens group is matched with the photosensitive element.
The half of the maximum field angle of the optical lens assembly is ω, and the curvature radius of the image-side surface of the sixth lens element 160 at the optical axis is RS12ω and RS12The following conditional expressions may be satisfied: 2mm-1<tanω/RS12<4mm-1. The curvature radius R of the image-side surface of the sixth lens element 160 at the optical axis is defined by a half ω of the maximum field angle of the optical lens assemblyS12Is defined to satisfy: 2mm-1<tanω/RS12<4mm-1The field curvature can be corrected well from the central view angle to the peripheral view angle, and the wide angle can be realized. If tan omega/RS12≥4mm-1The curvature radius of the image-side surface of the sixth lens element 160 closest to the image plane as the optical lens group at the optical axis is too small, and excessive aberration correction can be suppressed particularly at the peripheral view angle; if tan omega/RS12≤2mm-1The curvature radius of the image-side surface of the sixth lens element 160 at the optical axis is too large to facilitate the compression of the total length of the optical system.
The focal length of the optical lens group is f, and f and TTL satisfy the following conditional expression: 2< TTL/f <3.5, and by the limitation, the total length of the optical lens group can be effectively shortened, so that the formed electronic equipment can be light and thin, and the focal length of the optical lens group can meet the requirement of a wide field angle.
In order to make the optical lens group have the characteristic of large aperture, the f-number FNO of the optical lens group can satisfy the following conditional expression: FNO is more than or equal to 1.8 and less than or equal to 2.0. The f-number FNO through with optical lens group prescribes a limit to between 1.8 to 2.0, not only can make optical lens group possess the characteristics of large aperture, can also realize clear bright imaging effect.
The maximum field angle FOV of the optical lens group can satisfy: the FOV is more than or equal to 100 degrees. The maximum field angle of the optical lens group is limited to be larger than 100 degrees, a wide field angle can be realized, the shooting and viewing capacity is enhanced, the scenes seen by human eyes can be more reduced in a short distance range, and the user experience is improved.
The refractive power of the lens element can be the refractive power of the lens element at the optical axis. The object side surface of the lens is the surface of the lens facing the object side. The image side surface of the lens is a surface of the lens facing the image surface. The positive curvature radius of the surface at the optical axis may be only the positive curvature radius of the surface at the optical axis, or may be the positive curvature radius of the entire surface. The negative curvature radius of the surface may be a negative curvature radius of only the surface at the optical axis, or may be a negative curvature radius of the entire surface.
In the object-side surfaces of the first lens element 110, the second lens element 120, the third lens element 130, the fourth lens element 140, the fifth lens element 150, and the sixth lens element 160 and the image-side surfaces of the first lens element 110, the second lens element 120, the third lens element 130, the fourth lens element 140, the fifth lens element 150, and the sixth lens element 160, all surfaces may be spherical surfaces, all surfaces may be aspheric surfaces, and all surfaces may be partially spherical surfaces and partially aspheric surfaces. The surface being aspherical may be that the entire surface is aspherical. The surface is an aspheric surface, or part of the surface is an aspheric surface; for example, a portion near the optical axis may be aspherical. In order to better correct aberrations and improve imaging quality, a plurality of object side surfaces of the first lens 110, the second lens 120, the third lens 130, the fourth lens 140, the fifth lens 150 and the sixth lens 160 and a plurality of image side surfaces of the first lens 110, the second lens 120, the third lens 130, the fourth lens 140, the fifth lens 150 and the sixth lens 160 are preferably aspheric.
Because the plastic material has low cost, is convenient to process, and is convenient to make an aspheric surface, the first lens 110, the second lens 120, the third lens 130, the fourth lens 140, the fifth lens 150, and the sixth lens 160 can all be made of plastic materials. Certainly, in order to improve the imaging quality, part or all of the first lens 110, the second lens 120, the third lens 130, the fourth lens 140, and the fifth lens 150 may also be made of a glass material, and the glass material has strong adaptability to the environment and a wide temperature range, so that the imaging quality can be ensured.
In order to reduce stray light and improve the imaging effect, the optical lens group can further comprise a diaphragm. The diaphragm may be an aperture diaphragm and/or a field diaphragm. The diaphragm may be located between the object plane and the image plane. For example, the diaphragms may be located: between the object-side surface of the first lens element 110 and the object-side surface, between the image-side surface of the first lens element 110 and the object-side surface of the second lens element 120, between the image-side surface of the second lens element 120 and the object-side surface of the third lens element 130, between the image-side surface of the third lens element 130 and the object-side surface of the fourth lens element 140, between the image-side surface of the fourth lens element 140 and the object-side surface of the fifth lens element 150, between the image-side surface of the fifth lens element 150 and the object-side surface of the sixth lens element 160, or between the image-side surface of the sixth lens element 160 and the image plane. In order to reduce the processing cost, an aperture stop may be provided on any one of the object-side surface of the first lens 110, the object-side surface of the second lens 120, the object-side surface of the third lens 130, the object-side surface of the fourth lens 140, the object-side surface of the fifth lens 150, the object-side surface of the sixth lens 160, the image-side surface of the first lens 110, the image-side surface of the second lens 120, the image-side surface of the third lens 130, the image-side surface of the fourth lens 140, the image-side surface of the fifth lens 150, and the image-side surface of the sixth lens 160.
In order to filter the non-working wavelength band, the optical lens group may further include a filter element. The filter element may be a filter located between the object plane and the image plane. The filter may be located: between the object-side surface of the first lens element 110 and the object-side surface, between the image-side surface of the first lens element 110 and the object-side surface of the second lens element 120, between the image-side surface of the second lens element 120 and the object-side surface of the third lens element 130, between the image-side surface of the third lens element 130 and the object-side surface of the fourth lens element 140, between the image-side surface of the fourth lens element 140 and the object-side surface of the fifth lens element 150, between the image-side surface of the fifth lens element 150 and the object-side surface of the sixth lens element 160, or between the image-side surface of the sixth lens element 160 and the image plane. In order to reduce the production cost, the filter element may be a filter film plated on any one of the object-side surface of the first lens element 110, the object-side surface of the second lens element 120, the object-side surface of the third lens element 130, the object-side surface of the fourth lens element 140, the object-side surface of the fifth lens element 150, the object-side surface of the sixth lens element 160, the image-side surface of the first lens element 110, the image-side surface of the second lens element 120, the image-side surface of the third lens element 130, the image-side surface of the fourth lens element 140, the image-side surface of the fifth lens element 150, and the image-side surface of the sixth lens element 160.
The optical lens group of the embodiment of the application has the advantages that the camera module formed by the optical lens group has wide field angle, clear and bright imaging effect and miniaturization, and the application prospect is wide. The optical lens group according to the embodiment of the present invention is particularly suitable for use in information terminal devices such as smart phones, mobile phones, PDAs (Personal Digital assistants), game machines, PCs, and home electric appliances with an additional camera function, which are being miniaturized.
The optical lens group for imaging will be described in detail with reference to specific parameters.
Detailed description of the preferred embodiment
Referring to fig. 1, the optical lens group for imaging in the embodiment of the present application includes a first lens 110, a diaphragm (not shown), a second lens 120, a third lens 130, a fourth lens 140, a fifth lens 150, a sixth lens 160, and an infrared filter 170, which are sequentially disposed along an optical axis from an object plane to an image plane. The first lens element 110 with negative refractive power has a positive curvature radius of the object-side surface at the optical axis, a positive curvature radius of the object-side surface at the circumference, a positive curvature radius of the image-side surface at the optical axis, and a positive curvature radius of the image-side surface at the circumference. The second lens element 120 with positive refractive power has a positive object-side surface curvature radius at the optical axis, a positive object-side surface curvature radius at the circumference, a negative image-side surface curvature radius at the optical axis, and a negative image-side surface curvature radius at the circumference. The third lens element 130 with negative refractive power has a positive curvature radius of the object-side surface at the optical axis, a negative curvature radius of the object-side surface at the circumference, a positive curvature radius of the image-side surface at the optical axis, and a positive curvature radius of the image-side surface at the circumference. The fourth lens element 140 with negative refractive power has a positive curvature radius of the object-side surface at the optical axis, a positive curvature radius of the object-side surface at the circumference, a positive curvature radius of the image-side surface at the optical axis, and a negative curvature radius of the image-side surface at the circumference. The fifth lens element 150 with positive refractive power has a positive object-side surface curvature radius at the optical axis, a negative object-side surface curvature radius at the circumference, a negative image-side surface curvature radius at the optical axis, and a negative image-side surface curvature radius at the circumference. The sixth lens element 160 with negative refractive power has a positive object-side surface curvature radius at the optical axis, a negative object-side surface curvature radius at the circumference, a positive image-side surface curvature radius at the optical axis, and a negative image-side surface curvature radius at the circumference.
In the embodiment of the present application, light with a wavelength of 587.5618nm is taken as a reference, relevant parameters of the optical lens assembly are shown in table 1, f in table 1 is a focal length of the optical lens assembly, FNO represents an f-number, ω represents a half of a field angle of the optical lens assembly in a diagonal direction, and TTL is a distance from an object-side surface of the first lens element 110 to an image surface on an optical axis; the units of focal length, radius of curvature and thickness are in millimeters.
TABLE 1
The surfaces of the lenses of the optical lens group may be aspherical surfaces for which the aspherical equation for the aspherical surface is:
wherein Z represents the height in the lens surface parallel to the Z axis, r represents the radial distance from the vertex, c represents the curvature of the surface at the vertex, K represents the conic constant, A represents the conic constant4、A6、A8、A10、A12、A14、A16、A18、A20The aspheric coefficients of the corresponding orders of 4 th order, 6 th order, 8 th order, 10 th order, 12 th order, 14 th order, 16 th order, 18 th order and 20 th order are respectively shown. In the embodiment of the present application, the object side surfaces of the six lenses are aspheric surfaces, the image side surfaces of the six lenses are aspheric surfaces, and the conic constant K and the aspheric coefficient corresponding to the aspheric surfaces are shown in table 2:
TABLE 2
Fig. 2 a is a graph of longitudinal spherical aberration of the light with wavelengths of 486.1327nm, 587.5618nm and 656.2725nm in the embodiment of the present application, and it can be seen from fig. 2 that the corresponding longitudinal spherical aberration is within 0.025 mm, which illustrates that the imaging quality of the embodiment of the present application is better.
Fig. 2 b is a graph of astigmatism of the embodiment of the present application, and it can be seen from fig. 2 b that astigmatism is within 0.100 mm, and better compensation is obtained. C in fig. 2 is a distortion curve of the embodiment of the present application, and it can be seen from c in fig. 2 that distortion is also well corrected.
Detailed description of the invention
Referring to fig. 3, the optical lens group for imaging according to the embodiment of the present disclosure includes a first lens 110, a diaphragm (not shown), a second lens 120, a third lens 130, a fourth lens 140, a fifth lens 150, a sixth lens 160, and an infrared filter 170, which are sequentially disposed along an optical axis from an object plane to an image plane. The first lens element 110 with negative refractive power has a positive curvature radius of the object-side surface at the optical axis, a positive curvature radius of the object-side surface at the circumference, a positive curvature radius of the image-side surface at the optical axis, and a positive curvature radius of the image-side surface at the circumference. The second lens element 120 with positive refractive power has a positive object-side surface curvature radius at the optical axis, a positive object-side surface curvature radius at the circumference, a negative image-side surface curvature radius at the optical axis, and a negative image-side surface curvature radius at the circumference. The third lens element 130 with negative refractive power has a negative object-side surface curvature radius at the optical axis, a negative object-side surface curvature radius at the circumference, a positive image-side surface curvature radius at the optical axis, and a positive image-side surface curvature radius at the circumference. The fourth lens element 140 with negative refractive power has a positive curvature radius of the object-side surface at the optical axis, a positive curvature radius of the object-side surface at the circumference, a positive curvature radius of the image-side surface at the optical axis, and a negative curvature radius of the image-side surface at the circumference. The fifth lens element 150 with positive refractive power has a positive object-side surface curvature radius at the optical axis, a negative object-side surface curvature radius at the circumference, a negative image-side surface curvature radius at the optical axis, and a negative image-side surface curvature radius at the circumference. The sixth lens element 160 with negative refractive power has a positive object-side surface curvature radius at the optical axis, a negative object-side surface curvature radius at the circumference, a positive image-side surface curvature radius at the optical axis, and a negative image-side surface curvature radius at the circumference.
In the embodiment of the present application, light with a wavelength of 587.5618nm is taken as a reference, relevant parameters of the optical lens assembly are shown in table 3, f in table 3 is a focal length of the optical lens assembly, FNO represents an f-number, ω represents a half of a field angle of the optical lens assembly in a diagonal direction, and TTL is a distance from an object-side surface of the first lens element 110 to an image surface on an optical axis; the units of focal length, radius of curvature and thickness are in millimeters.
TABLE 3
In the embodiment of the present application, the object side surfaces of the six lenses are aspheric surfaces, the image side surfaces of the six lenses are aspheric surfaces, and the conic constant K and the aspheric coefficient corresponding to the aspheric surfaces are shown in table 4:
TABLE 4
| Number of noodles | S1 | S2 | S3 | S4 | S5 | S6 |
| K | 9.9000E+01 | 1.9884E+00 | -9.3187E+00 | -4.8084E-01 | -6.5958E+01 | -3.9250E+00 |
| A4 | 2.9870E-01 | 4.4361E-01 | -1.6302E-02 | -2.0246E-01 | -3.0621E-01 | -2.6198E-01 |
| A6 | -3.5476E-01 | -2.0783E-01 | 4.2741E-01 | 3.7490E-01 | 3.8575E-01 | 4.5714E-01 |
| A8 | 5.8054E-01 | -6.3107E-01 | -6.0915E+00 | -1.7079E+00 | -1.8293E-01 | -3.9423E-01 |
| A10 | -8.0219E-01 | 8.6908E+00 | 4.5438E+01 | 6.0665E+00 | -1.9702E+00 | -2.3910E-01 |
| A12 | 8.6374E-01 | -3.5292E+01 | -2.1845E+02 | -1.7474E+01 | 6.8521E+00 | 1.0509E+00 |
| A14 | -6.6813E-01 | 8.6515E+01 | 6.7182E+02 | 3.4709E+01 | -1.1547E+01 | -1.2619E+00 |
| A16 | 3.4104E-01 | -1.2786E+02 | -1.2867E+03 | -4.3860E+01 | 1.0886E+01 | 7.8778E-01 |
| A18 | -1.0236E-01 | 1.0553E+02 | 1.3955E+03 | 3.1427E+01 | -5.4066E+00 | -2.5737E-01 |
| A20 | 1.3503E-02 | -3.6717E+01 | -6.5593E+02 | -9.7827E+00 | 1.1002E+00 | 3.4725E-02 |
| Number of noodles | S7 | S8 | S9 | S10 | S11 | S12 |
| K | 2.2153E+00 | -4.7374E+00 | -7.8203E+00 | -2.3241E+00 | -2.2895E+00 | -1.4621E+00 |
| A4 | -1.9564E-01 | -1.0940E-01 | 2.0334E-01 | 2.3598E-01 | -5.8642E-02 | -4.2977E-01 |
| A6 | 1.9115E-01 | -2.9723E-01 | -4.5666E-01 | -3.7043E-01 | -3.7504E-01 | 3.2045E-01 |
| A8 | 2.3186E-01 | 7.1952E-01 | 7.0211E-01 | 7.1313E-01 | 6.0138E-01 | -1.7243E-01 |
| A10 | -9.3996E-01 | -1.1337E+00 | -7.2617E-01 | -7.8813E-01 | -5.4013E-01 | 6.4421E-02 |
| A12 | 1.2671E+00 | 1.1878E+00 | 4.8808E-01 | 5.0834E-01 | 2.9951E-01 | -1.6245E-02 |
| A14 | -9.3316E-01 | -7.9592E-01 | -2.1231E-01 | -2.0123E-01 | -1.0259E-01 | 2.7017E-03 |
| A16 | 3.9670E-01 | 3.2510E-01 | 5.6794E-02 | 4.8350E-02 | 2.1114E-02 | -2.8380E-04 |
| A18 | -9.0656E-02 | -7.2452E-02 | -8.3644E-03 | -6.4688E-03 | -2.3912E-03 | 1.7085E-05 |
| A20 | 8.4742E-03 | 6.6507E-03 | 5.1429E-04 | 3.6916E-04 | 1.1426E-04 | -4.5062E-07 |
Fig. 4 a is a graph of longitudinal spherical aberration of the light with wavelengths of 486.1327nm, 587.5618nm and 656.2725nm in the embodiment of the present application, and it can be seen from a in fig. 4 that the corresponding longitudinal spherical aberration is within 0.025 mm, which illustrates that the imaging quality of the embodiment of the present application is better.
B in fig. 4 is a graph of astigmatism of the embodiment of the present application, and it can be seen from b in fig. 4 that astigmatism is within 0.100 mm, which is better compensated. C in fig. 4 is a distortion curve of the embodiment of the present application, and it can be seen from c in fig. 4 that distortion is also well corrected.
Detailed description of the preferred embodiment
Referring to fig. 5, the optical lens group for imaging in the embodiment of the present application includes a first lens 110, a diaphragm (not shown), a second lens 120, a third lens 130, a fourth lens 140, a fifth lens 150, a sixth lens 160, and an infrared filter 170, which are sequentially disposed along an optical axis from an object plane to an image plane. The first lens element 110 with negative refractive power has a positive curvature radius of the object-side surface at the optical axis, a positive curvature radius of the object-side surface at the circumference, a positive curvature radius of the image-side surface at the optical axis, and a positive curvature radius of the image-side surface at the circumference. The second lens element 120 with positive refractive power has a positive object-side surface curvature radius at the optical axis, a positive object-side surface curvature radius at the circumference, a negative image-side surface curvature radius at the optical axis, and a negative image-side surface curvature radius at the circumference. The third lens element 130 with negative refractive power has a negative object-side surface curvature radius at the optical axis, a negative object-side surface curvature radius at the circumference, a positive image-side surface curvature radius at the optical axis, and a negative image-side surface curvature radius at the circumference. The fourth lens element 140 with negative refractive power has a negative object-side surface curvature radius at the optical axis, a negative object-side surface curvature radius at the circumference, a positive image-side surface curvature radius at the optical axis, and a negative image-side surface curvature radius at the circumference. The fifth lens element 150 with positive refractive power has a positive object-side surface curvature radius at the optical axis, a negative object-side surface curvature radius at the circumference, a negative image-side surface curvature radius at the optical axis, and a negative image-side surface curvature radius at the circumference. The sixth lens element 160 with negative refractive power has a positive object-side surface curvature radius at the optical axis, a negative object-side surface curvature radius at the circumference, a positive image-side surface curvature radius at the optical axis, and a negative image-side surface curvature radius at the circumference.
In the embodiment of the present application, light with a wavelength of 587.5618nm is taken as a reference, relevant parameters of the optical lens assembly are shown in table 5, f in table 5 is a focal length of the optical lens assembly, FNO represents an f-number, ω represents a half of a field angle of the optical lens assembly in a diagonal direction, and TTL is a distance from an object-side surface of the first lens element 110 to an image surface on an optical axis; the units of focal length, radius of curvature and thickness are in millimeters.
TABLE 5
In the embodiment of the present application, the object side surfaces of the six lenses are aspheric surfaces, the image side surfaces of the six lenses are aspheric surfaces, and the conic constant K and the aspheric coefficient corresponding to the aspheric surfaces are shown in table 6:
TABLE 6
| Number of noodles | S1 | S2 | S3 | S4 | S5 | S6 |
| K | 9.8076E+01 | 1.9657E+00 | -9.4907E+00 | -6.0057E-01 | -6.7222E+00 | -4.6800E+00 |
| A4 | 3.0068E-01 | 4.8072E-01 | -8.6880E-03 | -2.3981E-01 | -3.6701E-01 | -2.4546E-01 |
| A6 | -4.3300E-01 | -6.1162E-01 | 2.6535E-01 | 7.5233E-01 | 5.6979E-01 | 3.8927E-01 |
| A8 | 8.9766E-01 | 9.2568E-01 | -4.1338E+00 | -3.3012E+00 | -1.8571E-02 | -9.5183E-02 |
| A10 | -1.4167E+00 | 9.8664E+00 | 3.0321E+01 | 1.1085E+01 | -3.6717E+00 | -1.0472E+00 |
| A12 | 1.5485E+00 | -6.5087E+01 | -1.4182E+02 | -3.0196E+01 | 9.5365E+00 | 2.2660E+00 |
| A14 | -1.1166E+00 | 1.9145E+02 | 4.1932E+02 | 5.7775E+01 | -1.1756E+01 | -2.3439E+00 |
| A16 | 5.0728E-01 | -3.0419E+02 | -7.6921E+02 | -7.0094E+01 | 7.5462E+00 | 1.3693E+00 |
| A18 | -1.3178E-01 | 2.5490E+02 | 7.9797E+02 | 4.7730E+01 | -2.2273E+00 | -4.3641E-01 |
| A20 | 1.4685E-02 | -8.8020E+01 | -3.6066E+02 | -1.3952E+01 | 1.9767E-01 | 5.9681E-02 |
| Number of noodles | S7 | S8 | S9 | S10 | S11 | S12 |
| K | -9.9000E+01 | -3.5176E+00 | -7.9968E+00 | -2.5961E+00 | -2.2310E+00 | -1.4803E+00 |
| A4 | -5.9600E-02 | -8.2038E-02 | 1.5588E-01 | 1.9626E-01 | -5.5772E-02 | -4.8141E-01 |
| A6 | -6.3166E-02 | -3.8582E-01 | -2.3018E-01 | 1.1058E-02 | -2.9431E-01 | 3.5547E-01 |
| A8 | 5.2435E-01 | 7.5165E-01 | 2.1159E-01 | -8.6696E-02 | 3.6605E-01 | -1.9889E-01 |
| A10 | -1.0880E+00 | -8.9675E-01 | -1.0854E-01 | 5.5407E-02 | -2.4962E-01 | 8.0758E-02 |
| A12 | 1.1547E+00 | 7.2351E-01 | 6.9894E-03 | -2.5305E-02 | 1.0408E-01 | -2.2990E-02 |
| A14 | -7.0149E-01 | -3.8864E-01 | 2.0789E-02 | 9.1426E-03 | -2.6044E-02 | 4.4760E-03 |
| A16 | 2.4644E-01 | 1.3057E-01 | -1.0953E-02 | -2.1015E-03 | 3.7401E-03 | -5.6564E-04 |
| A18 | -4.6629E-02 | -2.3501E-02 | 2.3755E-03 | 2.5323E-04 | -2.7613E-04 | 4.1523E-05 |
| A20 | 3.6803E-03 | 1.5877E-03 | -1.9658E-04 | -1.1869E-05 | 7.6403E-06 | -1.3362E-06 |
Fig. 6 a is a graph of longitudinal spherical aberration of the light with wavelengths of 486.1327nm, 587.5618nm and 656.2725nm in the embodiment of the present application, and it can be seen from fig. 6 a that the corresponding longitudinal spherical aberration is within 0.05 mm, which illustrates that the imaging quality of the embodiment of the present application is better.
B in fig. 6 is a graph of astigmatism of the embodiment of the present application, and it can be seen from b in fig. 6 that astigmatism is within 0.25 mm, which is better compensated. C in fig. 6 is a distortion curve of the embodiment of the present application, and it can be seen from c in fig. 6 that distortion is also well corrected.
Detailed description of the invention
Referring to fig. 7, the optical lens group for imaging according to the embodiment of the present disclosure includes a first lens 110, a diaphragm (not shown), a second lens 120, a third lens 130, a fourth lens 140, a fifth lens 150, a sixth lens 160, and an infrared filter 170, which are sequentially disposed along an optical axis from an object plane to an image plane. The first lens element 110 with negative refractive power has a positive curvature radius of the object-side surface at the optical axis, a positive curvature radius of the object-side surface at the circumference, a positive curvature radius of the image-side surface at the optical axis, and a positive curvature radius of the image-side surface at the circumference. The second lens element 120 with positive refractive power has a positive object-side surface curvature radius at the optical axis, a positive object-side surface curvature radius at the circumference, a negative image-side surface curvature radius at the optical axis, and a negative image-side surface curvature radius at the circumference. The third lens element 130 with negative refractive power has a negative object-side surface curvature radius at the optical axis, a negative object-side surface curvature radius at the circumference, a positive image-side surface curvature radius at the optical axis, and a positive image-side surface curvature radius at the circumference. The fourth lens element 140 with negative refractive power has a positive curvature radius of the object-side surface at the optical axis, a positive curvature radius of the object-side surface at the circumference, a positive curvature radius of the image-side surface at the optical axis, and a negative curvature radius of the image-side surface at the circumference. The fifth lens element 150 with positive refractive power has a positive object-side surface curvature radius at the optical axis, a negative object-side surface curvature radius at the circumference, a negative image-side surface curvature radius at the optical axis, and a negative image-side surface curvature radius at the circumference. The sixth lens element 160 with negative refractive power has a positive object-side surface curvature radius at the optical axis, a negative object-side surface curvature radius at the circumference, a positive image-side surface curvature radius at the optical axis, and a negative image-side surface curvature radius at the circumference.
In the embodiment of the present application, light with a wavelength of 587.5618nm is taken as a reference, relevant parameters of the optical lens assembly are shown in table 7, f in table 7 is a focal length of the optical lens assembly, FNO represents an f-number, ω represents a half of a field angle of the optical lens assembly in a diagonal direction, and TTL is a distance from an object-side surface of the first lens element 110 to an image surface on an optical axis; the units of focal length, radius of curvature and thickness are in millimeters.
TABLE 7
In the embodiment of the present application, the object side surfaces of the six lenses are aspheric surfaces, the image side surfaces of the six lenses are aspheric surfaces, and the conic constant K and the aspheric coefficient corresponding to the aspheric surfaces are shown in table 8:
TABLE 8
Fig. 8 a is a graph of longitudinal spherical aberration of the light with wavelengths of 486.1327nm, 587.5618nm and 656.2725nm in the embodiment of the present application, and it can be seen from fig. 8 a that the corresponding longitudinal spherical aberration is within 0.025 mm, which illustrates that the imaging quality of the embodiment of the present application is better.
B in fig. 8 is a graph of astigmatism of the embodiment of the present application, and it can be seen from b in fig. 8 that astigmatism is within 0.1 mm, which is better compensated. C in fig. 8 is a distortion curve of the embodiment of the present application, and it can be seen from c in fig. 8 that distortion is also well corrected.
Detailed description of the preferred embodiment
Referring to fig. 9, the optical lens assembly for imaging in the embodiment of the present application includes a first lens 110, a diaphragm (not shown), a second lens 120, a third lens 130, a fourth lens 140, a fifth lens 150, a sixth lens 160, and an infrared filter 170, which are sequentially disposed along an optical axis from an object plane to an image plane. The first lens element 110 with negative refractive power has a positive curvature radius of the object-side surface at the optical axis, a positive curvature radius of the object-side surface at the circumference, a positive curvature radius of the image-side surface at the optical axis, and a positive curvature radius of the image-side surface at the circumference. The second lens element 120 with positive refractive power has a positive object-side surface curvature radius at the optical axis, a positive object-side surface curvature radius at the circumference, a negative image-side surface curvature radius at the optical axis, and a negative image-side surface curvature radius at the circumference. The third lens element 130 with negative refractive power has a negative object-side surface curvature radius at the optical axis, a negative object-side surface curvature radius at the circumference, a positive image-side surface curvature radius at the optical axis, and a positive image-side surface curvature radius at the circumference. The fourth lens element 140 with positive refractive power has a positive object-side surface curvature radius at the optical axis, a positive object-side surface curvature radius at the circumference, a positive image-side surface curvature radius at the optical axis, and a negative image-side surface curvature radius at the circumference. The fifth lens element 150 with positive refractive power has a positive object-side surface curvature radius at the optical axis, a negative object-side surface curvature radius at the circumference, a negative image-side surface curvature radius at the optical axis, and a negative image-side surface curvature radius at the circumference. The sixth lens element 160 with negative refractive power has a positive object-side surface curvature radius at the optical axis, a negative object-side surface curvature radius at the circumference, a positive image-side surface curvature radius at the optical axis, and a negative image-side surface curvature radius at the circumference.
In the embodiment of the present application, light with a wavelength of 587.5618nm is taken as a reference, relevant parameters of the optical lens assembly are shown in table 9, f in table 9 is a focal length of the optical lens assembly, FNO represents an f-number, ω represents a half of a field angle of the optical lens assembly in a diagonal direction, and TTL is a distance from an object-side surface of the first lens element 110 to an image surface on an optical axis; the units of focal length, radius of curvature and thickness are in millimeters.
TABLE 9
In the embodiment of the present application, the object side surfaces of the six lenses are aspheric surfaces, the image side surfaces of the six lenses are aspheric surfaces, and the conic constant K and the aspheric coefficient corresponding to the aspheric surfaces are shown in table 10:
watch 10
| Number of noodles | S1 | S2 | S3 | S4 | S5 | S6 |
| K | 9.8356E+01 | 2.1554E+00 | -1.1363E+01 | -7.3871E-01 | -9.9000E+01 | -3.8679E+00 |
| A4 | 3.3198E-01 | 4.1682E-01 | -2.0152E-02 | -1.8227E-01 | -2.8638E-01 | -3.0304E-01 |
| A6 | -4.8662E-01 | 4.3827E-01 | 5.2974E-01 | 6.9898E-01 | 2.7691E-01 | 6.6728E-01 |
| A8 | 1.0427E+00 | -7.0871E+00 | -8.0160E+00 | -5.2328E+00 | 7.3986E-01 | -9.2860E-01 |
| A10 | -1.8455E+00 | 4.7447E+01 | 6.4222E+01 | 2.3263E+01 | -7.0010E+00 | 5.5966E-01 |
| A12 | 2.3527E+00 | -1.8183E+02 | -3.2735E+02 | -6.7234E+01 | 2.1227E+01 | 2.8353E-01 |
| A14 | -2.0041E+00 | 4.3573E+02 | 1.0544E+03 | 1.2415E+02 | -3.4758E+01 | -7.3907E-01 |
| A16 | 1.0676E+00 | -6.3534E+02 | -2.0863E+03 | -1.4168E+02 | 3.2388E+01 | 5.1955E-01 |
| A18 | -3.2037E-01 | 5.1503E+02 | 2.3094E+03 | 9.0998E+01 | -1.6058E+01 | -1.6346E-01 |
| A20 | 4.1073E-02 | -1.7711E+02 | -1.0960E+03 | -2.5263E+01 | 3.2815E+00 | 1.9055E-02 |
| Number of noodles | S7 | S8 | S9 | S10 | S11 | S12 |
| K | 7.8798E-01 | 1.0678E+01 | 3.9540E+00 | -2.6920E+00 | -2.0104E+00 | -1.4611E+00 |
| A4 | -2.3675E-01 | -6.2438E-02 | 2.2092E-01 | 2.3370E-01 | -4.2524E-02 | -3.4627E-01 |
| A6 | 3.8598E-01 | -3.7702E-01 | -4.2151E-01 | -3.0413E-01 | -2.7336E-01 | 2.0097E-01 |
| A8 | -4.1109E-01 | 8.8128E-01 | 6.0120E-01 | 4.9602E-01 | 3.6070E-01 | -6.9368E-02 |
| A10 | 4.2844E-01 | -1.4304E+00 | -6.1175E-01 | -4.7017E-01 | -2.4908E-01 | 1.0496E-02 |
| A12 | -6.1616E-01 | 1.5888E+00 | 4.1373E-01 | 2.5576E-01 | 1.0571E-01 | 1.2351E-03 |
| A14 | 7.2998E-01 | -1.1461E+00 | -1.8277E-01 | -8.4305E-02 | -2.8043E-02 | -8.3674E-04 |
| A16 | -5.1104E-01 | 5.0691E-01 | 4.9496E-02 | 1.6746E-02 | 4.5137E-03 | 1.5087E-04 |
| A18 | 1.8717E-01 | -1.2301E-01 | -7.2939E-03 | -1.8448E-03 | -4.0213E-04 | -1.2494E-05 |
| A20 | -2.7898E-02 | 1.2424E-02 | 4.4134E-04 | 8.6473E-05 | 1.5184E-05 | 4.0356E-07 |
Fig. 10 a is a graph of longitudinal spherical aberration of the light with wavelengths of 486.1327nm, 587.5618nm and 656.2725nm in the embodiment of the present application, and it can be seen from fig. 10 a that the corresponding longitudinal spherical aberration is within 0.025 mm, which illustrates that the imaging quality of the embodiment of the present application is better.
B in fig. 10 is a graph of astigmatism of the embodiment of the present application, and it can be seen from b in fig. 10 that astigmatism is within 0.25 mm, which is better compensated. Fig. 10 c is a distortion curve of the embodiment of the present application, and it can be seen from fig. 10 c that distortion is also well corrected.
Detailed description of the preferred embodiment
Referring to fig. 11, the optical lens group for imaging according to the embodiment of the present disclosure includes a first lens 110, a diaphragm (not shown), a second lens 120, a third lens 130, a fourth lens 140, a fifth lens 150, a sixth lens 160, and an infrared filter 170, which are sequentially disposed along an optical axis from an object plane to an image plane. The first lens element 110 with negative refractive power has a positive curvature radius of the object-side surface at the optical axis, a positive curvature radius of the object-side surface at the circumference, a positive curvature radius of the image-side surface at the optical axis, and a positive curvature radius of the image-side surface at the circumference. The second lens element 120 with positive refractive power has a positive object-side surface curvature radius at the optical axis, a positive object-side surface curvature radius at the circumference, a negative image-side surface curvature radius at the optical axis, and a negative image-side surface curvature radius at the circumference. The third lens element 130 with negative refractive power has a negative object-side surface curvature radius at the optical axis, a negative object-side surface curvature radius at the circumference, a positive image-side surface curvature radius at the optical axis, and a negative image-side surface curvature radius at the circumference. The fourth lens element 140 with positive refractive power has a positive object-side surface curvature radius at the optical axis, a negative object-side surface curvature radius at the circumference, a negative image-side surface curvature radius at the optical axis, and a negative image-side surface curvature radius at the circumference. The fifth lens element 150 with positive refractive power has a positive object-side surface curvature radius at the optical axis, a negative object-side surface curvature radius at the circumference, a negative image-side surface curvature radius at the optical axis, and a negative image-side surface curvature radius at the circumference. The sixth lens element 160 with negative refractive power has a positive object-side surface curvature radius at the optical axis, a negative object-side surface curvature radius at the circumference, a positive image-side surface curvature radius at the optical axis, and a negative image-side surface curvature radius at the circumference.
In the embodiment of the present application, light with a wavelength of 587.5618nm is taken as a reference, relevant parameters of the optical lens assembly are shown in table 11, f in table 11 is a focal length of the optical lens assembly, FNO represents an f-number, ω represents a half of a field angle of the optical lens assembly in a diagonal direction, and TTL is a distance from an object-side surface of the first lens element 110 to an image surface on an optical axis; the units of focal length, radius of curvature and thickness are in millimeters.
TABLE 11
In the embodiment of the present application, the object side surfaces of the six lenses are aspheric surfaces, the image side surfaces of the six lenses are aspheric surfaces, and the conic constant K and the aspheric coefficient corresponding to the aspheric surfaces are shown in table 12:
TABLE 12
| Number of noodles | S1 | S2 | S3 | S4 | S5 | S6 |
| K | 9.8986E+01 | 2.1510E+00 | -1.0276E+01 | -4.8210E-01 | -9.7559E+01 | -3.9644E+00 |
| A4 | 2.7487E-01 | 4.1776E-01 | -9.6360E-03 | -2.2634E-01 | -2.9040E-01 | -2.5089E-01 |
| A6 | -3.4982E-01 | 6.6612E-02 | 3.6432E-01 | 8.8876E-01 | 2.6403E-01 | 2.3704E-01 |
| A8 | 6.3082E-01 | -4.9512E+00 | -5.9110E+00 | -5.5181E+00 | 1.0817E+00 | 4.4308E-01 |
| A10 | -9.1116E-01 | 4.2063E+01 | 4.6003E+01 | 2.2819E+01 | -7.6350E+00 | -1.7841E+00 |
| A12 | 9.2848E-01 | -1.8027E+02 | -2.2238E+02 | -6.4963E+01 | 2.0366E+01 | 2.6600E+00 |
| A14 | -6.2024E-01 | 4.5968E+02 | 6.7108E+02 | 1.2077E+02 | -3.0686E+01 | -2.2205E+00 |
| A16 | 2.5422E-01 | -6.9262E+02 | -1.2447E+03 | -1.3961E+02 | 2.7064E+01 | 1.0840E+00 |
| A18 | -5.7538E-02 | 5.7042E+02 | 1.3000E+03 | 9.0836E+01 | -1.2931E+01 | -2.8774E-01 |
| A20 | 5.4078E-03 | -1.9744E+02 | -5.8863E+02 | -2.5498E+01 | 2.5815E+00 | 3.1865E-02 |
| Number of noodles | S7 | S8 | S9 | S10 | S11 | S12 |
| K | 1.1544E+00 | -8.2040E+01 | 1.1847E+01 | -2.6039E+00 | -2.0876E+00 | -1.4274E+00 |
| A4 | -1.6385E-01 | -1.1433E-01 | 1.6723E-01 | 2.2514E-01 | -4.6271E-02 | -4.0610E-01 |
| A6 | 4.5571E-02 | -5.7317E-02 | -2.6767E-01 | -3.0666E-01 | -2.7752E-01 | 3.0046E-01 |
| A8 | 3.5440E-01 | -1.7138E-02 | 3.0315E-01 | 5.8623E-01 | 4.1082E-01 | -1.5311E-01 |
| A10 | -5.2119E-01 | 8.6847E-02 | -2.2720E-01 | -6.3550E-01 | -3.1287E-01 | 5.1944E-02 |
| A12 | 9.0330E-02 | -4.0558E-02 | 9.4556E-02 | 3.8836E-01 | 1.4160E-01 | -1.1560E-02 |
| A14 | 3.9245E-01 | -1.7268E-02 | -1.7578E-02 | -1.4211E-01 | -3.9118E-02 | 1.6509E-03 |
| A16 | -3.9842E-01 | 1.7581E-02 | -1.3238E-03 | 3.1096E-02 | 6.4761E-03 | -1.4419E-04 |
| A18 | 1.6015E-01 | -2.9811E-03 | 1.1474E-03 | -3.7618E-03 | -5.9079E-04 | 6.9321E-06 |
| A20 | -2.4377E-02 | -1.9472E-04 | -1.3927E-04 | 1.9384E-04 | 2.2840E-05 | -1.3882E-07 |
Fig. 12 a is a graph of longitudinal spherical aberration of the light with wavelengths of 486.1327nm, 587.5618nm and 656.2725nm in the embodiment of the present application, and it can be seen from fig. 12 a that the corresponding longitudinal spherical aberration is within 0.025 mm, which illustrates that the imaging quality of the embodiment of the present application is better.
Fig. 12 b is a graph of astigmatism of the embodiment of the present application, and it can be seen from fig. 12 b that astigmatism is within 0.15 mm, and good compensation is obtained. Fig. 12 c is a distortion curve chart of the embodiment of the present application, and it can be seen from fig. 12 c that distortion is also well corrected.
Detailed description of the preferred embodiment
Referring to fig. 13, the optical lens group for imaging according to the embodiment of the present disclosure includes a first lens 110, a diaphragm (not shown), a second lens 120, a third lens 130, a fourth lens 140, a fifth lens 150, a sixth lens 160, and an infrared filter 170, which are sequentially disposed along an optical axis from an object plane to an image plane. The first lens element 110 with negative refractive power has a positive curvature radius of the object-side surface at the optical axis, a positive curvature radius of the object-side surface at the circumference, a positive curvature radius of the image-side surface at the optical axis, and a positive curvature radius of the image-side surface at the circumference. The second lens element 120 with positive refractive power has a positive object-side surface curvature radius at the optical axis, a positive object-side surface curvature radius at the circumference, a negative image-side surface curvature radius at the optical axis, and a negative image-side surface curvature radius at the circumference. The third lens element 130 with negative refractive power has a negative object-side surface curvature radius at the optical axis, a negative object-side surface curvature radius at the circumference, a positive image-side surface curvature radius at the optical axis, and a positive image-side surface curvature radius at the circumference. The fourth lens element 140 with positive refractive power has a positive object-side surface curvature radius at the optical axis, a positive object-side surface curvature radius at the circumference, a positive image-side surface curvature radius at the optical axis, and a negative image-side surface curvature radius at the circumference. The fifth lens element 150 with positive refractive power has a positive object-side surface curvature radius at the optical axis, a negative object-side surface curvature radius at the circumference, a negative image-side surface curvature radius at the optical axis, and a negative image-side surface curvature radius at the circumference. The sixth lens element 160 with negative refractive power has a positive object-side surface curvature radius at the optical axis, a negative object-side surface curvature radius at the circumference, a positive image-side surface curvature radius at the optical axis, and a negative image-side surface curvature radius at the circumference.
In the embodiment of the present application, light with a wavelength of 587.5618nm is taken as a reference, relevant parameters of the optical lens assembly are shown in table 13, f in table 13 is a focal length of the optical lens assembly, FNO represents an f-number, ω represents a half of a field angle of the optical lens assembly in a diagonal direction, and TTL is a distance from an object-side surface of the first lens element 110 to an image plane on an optical axis; the units of focal length, radius of curvature and thickness are in millimeters.
In the embodiment of the present application, the object side surfaces of the six lenses are aspheric surfaces, the image side surfaces of the six lenses are aspheric surfaces, and the conic constant K and the aspheric coefficient corresponding to the aspheric surfaces are shown in table 14:
TABLE 14
Fig. 14 a is a graph of longitudinal spherical aberration of light rays with wavelengths of 486.1327nm, 587.5618nm and 656.2725nm in the embodiment of the present application, and it can be seen from fig. 14 a that the longitudinal spherical aberration corresponding to the wavelengths of 486.1327nm, 587.5618nm and 656.2725nm are all within 0.04 mm, which illustrates that the imaging quality of the embodiment of the present application is better.
B in fig. 14 is a graph of astigmatism of the embodiment of the present application, and it can be seen from b in fig. 14 that astigmatism is within 0.25 mm, which is better compensated. Fig. 14 c is a distortion curve of the embodiment of the present application, and it can be seen from fig. 14 c that distortion is also well corrected.
Detailed description of the preferred embodiment
Referring to fig. 15, a schematic structural diagram of an optical lens assembly for imaging according to an embodiment of the present disclosure includes a first lens 110, a diaphragm (not shown), a second lens 120, a third lens 130, a fourth lens 140, a fifth lens 150, a sixth lens 160, and an infrared filter 170, which are sequentially disposed along an optical axis from an object plane to an image plane. The first lens element 110 with negative refractive power has a positive curvature radius of the object-side surface at the optical axis, a positive curvature radius of the object-side surface at the circumference, a positive curvature radius of the image-side surface at the optical axis, and a positive curvature radius of the image-side surface at the circumference. The second lens element 120 with positive refractive power has a positive object-side surface curvature radius at the optical axis, a positive object-side surface curvature radius at the circumference, a negative image-side surface curvature radius at the optical axis, and a negative image-side surface curvature radius at the circumference. The third lens element 130 with negative refractive power has a negative object-side curvature radius at the optical axis, a negative object-side curvature radius at the circumference, a negative image-side curvature radius at the optical axis, and a negative image-side curvature radius at the circumference. The fourth lens element 140 with negative refractive power has a negative object-side surface curvature radius at the optical axis, a negative object-side surface curvature radius at the circumference, a positive image-side surface curvature radius at the optical axis, and a negative image-side surface curvature radius at the circumference. The fifth lens element 150 with positive refractive power has a positive object-side surface curvature radius at the optical axis, a negative object-side surface curvature radius at the circumference, a negative image-side surface curvature radius at the optical axis, and a negative image-side surface curvature radius at the circumference. The sixth lens element 160 with negative refractive power has a positive object-side surface curvature radius at the optical axis, a negative object-side surface curvature radius at the circumference, a positive image-side surface curvature radius at the optical axis, and a negative image-side surface curvature radius at the circumference.
In the embodiment of the present application, light with a wavelength of 587.5618nm is taken as a reference, relevant parameters of the optical lens assembly are shown in table 15, f in table 15 is a focal length of the optical lens assembly, FNO represents an f-number, ω represents a half of a field angle of the optical lens assembly in a diagonal direction, and TTL is a distance from an object-side surface of the first lens element 110 to an image surface on an optical axis; the units of focal length, radius of curvature and thickness are in millimeters.
In the embodiment of the present application, the object side surfaces of the six lenses are aspheric surfaces, the image side surfaces of the six lenses are aspheric surfaces, and the conic constant K and the aspheric coefficient corresponding to the aspheric surfaces are shown in table 16:
TABLE 16
Fig. 16 a is a graph of longitudinal spherical aberration of light rays with wavelengths of 486.1327nm, 587.5618nm and 656.2725nm in the embodiment of the present application, and it can be seen from fig. 16 a that the corresponding longitudinal spherical aberration is within 0.04 mm, which illustrates that the imaging quality of the embodiment of the present application is better.
B in fig. 16 is a graph of astigmatism of the embodiment of the present application, and it can be seen from b in fig. 16 that astigmatism is within 0.1 mm, and better compensation is obtained. C in fig. 16 is a distortion curve chart of the embodiment of the present application, and it can be seen from c in fig. 16 that distortion is also well corrected.
The data for the eight sets of examples above are as in table 17 below:
in a second aspect, an embodiment of the present application provides a camera module. The camera module comprises any optical lens group and an image sensor. The optical lens group is used for receiving optical signals of a shot object, and the image sensor is arranged at the image side of the optical lens group and used for receiving the optical signals and converting the optical signals into image signals.
In a third aspect, an embodiment of the present application provides an electronic device. Electronic equipment includes foretell camera module and casing, and camera module can set up on the casing. The electronic device may be any device having a function of acquiring an image. For example, the electronic device may be a smart phone, a wearable device, a computer device, a television, a vehicle, a camera, a monitoring device, or the like, and the camera module is configured to cooperate with the electronic device to capture and reproduce an image of the target object.
In the description of the present application, it is to be understood that the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art. Further, in the description of the present application, "a plurality" means two or more unless otherwise specified. "and/or" describes the association relationship of the associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship.
The above disclosure is only for the purpose of illustrating the preferred embodiments of the present application and is not to be construed as limiting the scope of the present application, so that the present application is not limited thereto, and all equivalent variations and modifications can be made to the present application.
Claims (14)
1. An optical lens group is characterized by comprising a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens which are sequentially arranged from an object plane to an image plane along an optical axis;
the first lens element with negative refractive power has a positive curvature radius of an object-side surface of the first lens element on the optical axis, and a positive curvature radius of an image-side surface of the first lens element on the optical axis;
the second lens element with positive refractive power;
the third lens element with negative refractive power;
the distance between the object side surface of the first lens element and the image plane on the optical axis is TTL, half of the image height corresponding to the maximum field angle of the optical lens group is ImgH, and TTL and ImgH satisfy the following conditional expressions:
TTL/ImgH<1.9。
2. the optical lens assembly of claim 1, wherein the focal length of the optical lens assembly is f, and f and TTL satisfy the following conditional expressions:
2<TTL/f<3.5。
3. the optical lens assembly of claim 1, wherein the radius of curvature of the object-side surface of the second lens element at the optical axis is positive, and the radius of curvature of the image-side surface of the second lens element at the optical axis is negative.
4. The optical lens assembly of claim 1, wherein the radius of curvature of the object-side surface of the fifth lens element at the optical axis is positive, and the radius of curvature of the image-side surface of the fifth lens element at the optical axis is negative.
5. The optical lens assembly of claim 1, wherein a radius of curvature of an object-side surface of the sixth lens element at the optical axis is positive, and a radius of curvature of an image-side surface of the sixth lens element at the optical axis is positive.
6. Optical lens group according to claim 1, characterized in that the f-number of the optical lens group is FNO, which satisfies the following conditional expression:
1.8≤FNO≤2.0。
7. the optical lens group according to claim 1, wherein the maximum field angle of the optical lens group is the FOV, and the FOV satisfies the following conditional expression:
FOV≥100°。
8. the optical lens assembly of claim 1, wherein the second lens element has a focal length f2The focal length of the optical lens group is f, f2And f satisfies the following conditional expressions:
0.8<f2/f<1.5。
9. the optical lens assembly of claim 1, wherein the first lens element has a focal length f1The focal length of the optical lens group is f, f1And f satisfies the following conditional expressions:
f/f1>-1。
10. the optical lens assembly of claim 1, wherein half of the maximum field angle of the optical lens assembly is ω, and the radius of curvature of the image-side surface of the sixth lens element at the optical axis is RS12ω and RS12The following conditional expressions are satisfied:
2mm-1<tanω/RS12<4mm-1。
11. the optical lens assembly of claim 1, wherein a minimum distance between an image-side surface of the sixth lens element and the image plane on the optical axis is BF, and BF satisfies the following conditional expression:
BF≥0.77mm。
12. an optical lens assembly according to claim 1, wherein the third lens element has an abbe number v3，v3The following conditional expressions are satisfied:
v3<30。
13. the utility model provides a camera module which characterized in that includes:
the optical lens assembly of any one of claims 1-12 and an image sensor disposed on an image side of the optical lens assembly.
14. An electronic device, comprising:
a housing; and
the camera module of claim 13, said camera module being disposed on said housing.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113325549A (en) * | 2021-06-04 | 2021-08-31 | Oppo广东移动通信有限公司 | Optical lens system, image capturing device and electronic equipment |
| CN113960759A (en) * | 2021-11-05 | 2022-01-21 | 江西晶超光学有限公司 | Optical lens, camera module and electronic equipment |
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2020
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113325549A (en) * | 2021-06-04 | 2021-08-31 | Oppo广东移动通信有限公司 | Optical lens system, image capturing device and electronic equipment |
| CN113960759A (en) * | 2021-11-05 | 2022-01-21 | 江西晶超光学有限公司 | Optical lens, camera module and electronic equipment |
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