CN113917656A - Optical lens, camera module and electronic equipment - Google Patents
Optical lens, camera module and electronic equipment Download PDFInfo
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- CN113917656A CN113917656A CN202111119010.3A CN202111119010A CN113917656A CN 113917656 A CN113917656 A CN 113917656A CN 202111119010 A CN202111119010 A CN 202111119010A CN 113917656 A CN113917656 A CN 113917656A
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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
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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
- G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
- G02B13/0055—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras employing a special optical element
- G02B13/0065—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras employing a special optical element having a beam-folding prism or mirror
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- 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
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- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
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Abstract
The invention discloses an optical lens, a camera module and an electronic device, wherein the optical lens comprises the following components 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 at paraxial region; a second lens element with positive refractive power having a convex object-side surface and a convex image-side surface at paraxial region; a third lens element with negative refractive power; a fourth lens element with refractive power having a concave image-side surface at paraxial region; a fifth lens element with negative refractive power having a concave object-side surface and a concave image-side surface at a paraxial region; the sixth lens element with positive refractive power has an optical lens element satisfying the following relationship: 1deg/mm < FOV/TTL <4 deg/mm. The optical lens, the camera module and the electronic equipment provided by the embodiment of the invention can realize high-quality imaging of distant scenes while meeting the design requirement of miniaturization.
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
Along with the miniaturization requirement of the public on electronic equipment (such as mobile phones, tablet computers, telephone watches and the like) is higher and higher, the miniaturization requirement on each part adapted to the electronic equipment is also stricter, and meanwhile, in order to realize the camera shooting function of the electronic equipment, the camera shooting module is an indispensable part in the existing electronic equipment. In order to meet the miniaturization demand of electronic devices, the size development of camera modules tends to be more miniaturized. Because electronic equipment's thickness restriction for the size restriction of the module of making a video recording is bigger, and the module of making a video recording can't realize high-quality formation of image, leads to the module of making a video recording can't realize the clear imaging effect to the scenery in distance simultaneously.
Disclosure of Invention
The embodiment of the invention discloses an optical lens, a camera module and electronic equipment, which can realize high-quality imaging of distant scenes while meeting the design requirement of miniaturization.
In order to achieve the above object, a first aspect of 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 positive refractive power has a convex object-side surface at a paraxial region thereof and a convex image-side surface at a paraxial region thereof;
the third lens element with negative refractive power;
the fourth lens element with refractive power has a concave image-side surface at paraxial region;
the fifth lens element with negative refractive power has a concave object-side surface at a paraxial region thereof and a concave image-side surface at a paraxial region thereof;
the sixth lens element with positive refractive power;
the optical lens satisfies the following relation:
1deg/mm<FOV/TTL<4deg/mm；
the FOV is the maximum field angle of the optical lens, and the TTL is the distance from the object side surface of the first lens to the imaging surface of the optical lens on the optical axis.
According to the optical lens, when light enters the first lens, due to the fact that the first lens has positive refractive power, the object side surface of the first lens is convex at the paraxial region, and the image side surface of the first lens is concave at the paraxial region, good light converging capacity can be achieved, the axial size of the optical lens can be shortened, the optical lens is miniaturized, and meanwhile the optical lens can obtain enough relative illumination so as to improve the imaging quality of the optical lens; when incident light rays are incident to the second lens element, the second lens element provides positive refractive power for the optical lens, and the object side surface and the image side surface of the second lens element are both convex in the paraxial region, so that the positive refractive power of the second lens element is enhanced, and the second lens element and the first lens element act together to enable large-angle light rays to enter the optical lens element, thereby meeting the requirement of the optical lens element on the photographing range; when light enters the third lens element, the negative refractive power of the third lens element, in combination with the concave image-side surface of the fourth lens element at paraxial region, can balance the aberrations of the first and second lens elements; the object side surface and the image side surface of the fifth lens are both concave in the surface type at the paraxial region, so that the aberration generated by the front lens group (the first lens to the fourth lens) can be further balanced, and the imaging quality of the optical lens is improved; meanwhile, the surface type design of the fifth lens element is matched with the sixth lens element with positive refractive power, so that incident light rays can have a proper deflection angle, the incident light rays can be incident on the imaging surface at a proper angle, the direction change of the incident light rays is slowed down, the optical lens is prevented from generating astigmatism, meanwhile, the edge field of view can be ensured to have enough relative illumination, the dark angle is avoided during imaging, and the imaging quality of the optical lens is improved. Through reasonable design of the refractive power and the surface type of the first lens to the sixth lens, the optical lens is favorable for meeting the long-focus characteristic, so that the details of the focused distant scenery are more prominent, and a good imaging effect on the distant scenery is realized. Meanwhile, the optical lens satisfies the relation: the angle of view of the optical lens can be small, namely the incident angle of incident light of the optical lens is controlled within a reasonable range, so that the optical lens can obtain a high-quality imaging effect when shooting a distant scene.
As an alternative implementation, in an embodiment of the first aspect of the present invention, the optical lens satisfies the following relation:
TTL/ImgH>3.4；
wherein, TTL is a distance from an object side surface of the first lens element to an imaging surface of the optical lens along the optical axis, that is, a total length of the optical lens, and ImgH is a radius of a maximum effective imaging circle of the optical lens.
Through controlling the ratio of the total length of the optical lens to the radius of the maximum effective imaging circle of the optical lens, the total length of the optical lens is at least more than three times of the radius of the maximum effective imaging circle of the optical lens, so that the layout of each lens of the optical lens is more reasonable, and the optical lens can obtain a high-quality imaging effect when a distant scene is shot.
As an alternative implementation, in an embodiment of the first aspect of the present invention, the optical lens satisfies the following relation:
SD11/SD62>1；
wherein SD11 is the maximum effective half aperture of the object-side surface of the first lens element, and SD62 is the maximum effective half aperture of the image-side surface of the sixth lens element.
The ratio of the object side surface of the first lens to the effective half aperture of the image side surface of the sixth lens from the object side of the optical lens can reflect the aperture size of the front end and the rear end of the lens barrel adapted to the optical lens, when the above relational expression is satisfied, the ratio can be controlled within a reasonable range, the aperture of the first lens is larger than the aperture of the sixth lens, the diameter size of the front port of the lens barrel of the optical lens can be larger than the diameter size of the rear port, the effective focal length of the optical lens can be improved, the details of a focused distant scenery can be more prominent, and a good imaging effect on the distant scenery can be realized.
As an alternative implementation, in an embodiment of the first aspect of the present invention, the optical lens satisfies the following relation:
2.5mm<f/Fno<5.5mm；
wherein f is an effective focal length of the optical lens, and Fno is an f-number of the optical lens.
When the relation between the effective focal length and the diaphragm number of the optical lens meets the relational expression, the design requirement of the optical lens for realizing a large diaphragm and simultaneously considering a long focus can be met, namely, the light inlet quantity of the optical lens is improved through the design of the large diaphragm of the optical lens, and then the clear imaging of the optical lens is realized.
As an alternative implementation, in an embodiment of the first aspect of the present invention, the optical lens satisfies the following relation:
1<(|T34|+|T45|)/CT4<3.5；
wherein T34 is a distance between an image-side surface of the third lens element and an object-side surface of the fourth lens element on the optical axis, T45 is a distance between the image-side surface of the fourth lens element and an object-side surface of the fifth lens element on the optical axis, and CT4 is a distance between the object-side surface of the fourth lens element and the image-side surface of the fourth lens element on the optical axis.
When the optical lens meets the above relational expression, the gap between the third lens, the fourth lens and the fifth lens and the thickness of the fourth lens on the optical axis can be reasonably configured, and a smaller incident angle and an exit angle can be maintained, so that the angle difference of marginal rays when the marginal rays are incident into the third lens and emitted out of the fifth lens is reduced, further the direction change of the marginal rays after entering the optical lens is slowed down, the generation of astigmatism of the optical lens is avoided, 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:
T23/T12<1；
wherein T23 is a distance between an image-side surface of the second lens element and an object-side surface of the third lens element on the optical axis, and T12 is a distance between an image-side surface of the first lens element and an object-side surface of the second lens element on the optical axis.
Through the restriction of the above relational expression on the first lens, the second lens and the third lens, the layout of the first lens, the second lens and the third lens is more reasonable, namely, the gap between the first lens, the second lens and the third lens is more reasonable, so as to meet the miniaturization design requirement of the optical lens, meanwhile, the reasonable gap configuration can reserve enough space for the subsequent assembly work of the optical lens, and further improve the lens molding yield and the assembly yield 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:
|V3-V1|>30；
wherein V3 is the Abbe number of the third lens, and V1 is the Abbe number of the first lens.
Because the influence of the material of each lens on the lens characteristics is large, and the abbe number of the lens directly reflects the dispersion capability of the lens, in order to better control the performance of the optical lens, the material selection of the first lens and the third lens is guided by controlling the relation between the abbe numbers of the first lens and the third lens, so that the chromatic aberration correction capability of the optical lens is improved, 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:
(n1+n3)/f<0.36mm-1；
wherein n1 is a refractive index of the first lens at a reference wavelength of 587.6nm, n3 is a refractive index of the third lens at a reference wavelength of 587.6nm, and f is an effective focal length of the optical lens.
The relationship between the refractive power of the first lens element and the refractive power of the third lens element and the effective focal length of the optical lens element is reasonably distributed, so that the chromatic aberration and the spherical aberration of the optical lens element can be reduced, the imaging quality of the optical lens element can be improved, and meanwhile, the capability of the optical lens element for converging light rays can be improved by limiting the refractive power of the first lens element and the refractive power of the third lens element, and the imaging definition of the optical lens element can be improved.
As an alternative implementation, in an embodiment of the first aspect of the present invention, the optical lens satisfies the following relation:
0.5<DL/TTL<0.7；
and DL is the distance between the object side surface of the first lens and the image side surface of the sixth lens on the optical axis.
When optical lens satisfies above-mentioned relational expression, can make optical lens's each lens's overall arrangement structure is more reasonable, and then reduces optical lens's first lens extremely sixth lens is shared optical lens's space, in order to satisfy optical lens's miniaturized design demand, can make simultaneously optical lens can better adaptation camera module's structural layout.
In a second aspect, the present invention discloses a camera module, which includes an image sensor and the optical lens of the first aspect, wherein the image sensor is disposed on the image side of the optical lens. The camera module with the optical lens can realize high-quality imaging of distant scenery when the miniaturized design requirement is met.
In a third aspect, the present invention discloses an electronic device, which includes a housing and the camera module set according to the second aspect, wherein the camera module set is disposed on the housing. Electronic equipment with this module of making a video recording can realize the high-quality formation of image to distant scenery when realizing miniaturized design demand.
Compared with the prior art, the invention has the beneficial effects that:
according to the optical lens, the camera module and the electronic device provided by the embodiment of the invention, when light enters the first lens, as the first lens has positive refractive power, and the surface type design that the object side surface is a convex surface at a paraxial region and the image side surface is a concave surface at the paraxial region is adopted, the good capability of converging light can be realized, the axial size of the optical lens can be shortened, the miniaturization of the optical lens is realized, and meanwhile, the optical lens can obtain enough relative illumination so as to improve the imaging quality of the optical lens; when incident light rays enter the second lens element, the second lens element provides positive refractive power for the optical lens, and the object-side surface and the image-side surface of the second lens element are both convex at a paraxial region, so that the positive refractive power of the second lens element is enhanced, and the second lens element and the first lens element act together to enable large-angle light rays to enter the optical lens element, thereby meeting the requirement of the optical lens element on the photographing range; when light enters the third lens element, the negative refractive power of the third lens element, in combination with the concave surface of the fourth lens element at a paraxial region, can balance the aberrations of the first and second lens elements; the object side surface and the image side surface of the fifth lens are both concave in the position near the optical axis, so that the aberration generated by the front lens group (the first lens to the fourth lens) can be further balanced, and the imaging quality of the optical lens is improved; meanwhile, the surface type design of the fifth lens element is matched with the sixth lens element with positive refractive power, so that incident light rays can have a proper deflection angle, the incident light rays can be incident to an imaging surface at a proper angle, the direction change of the incident light rays is slowed down, the optical lens is prevented from generating astigmatism, meanwhile, the marginal view field can be ensured to have enough relative illumination, the dark angle is prevented from existing during imaging, and the imaging quality of the optical lens is improved. Through the reasonable design of the refractive power and the surface type of the first lens, the second lens, the third lens and the fourth lens, the optical lens can meet the long-focus characteristic, the details of the focused distant scenery are more prominent, and the good imaging effect of the distant scenery is realized. Meanwhile, the optical lens satisfies the relation: the angle of field of the optical lens is smaller than 1deg/mm < FOV/TTL <4deg/mm, namely the incident angle of the incident light of the optical lens is controlled within a reasonable range, so that the optical lens can obtain a high-quality imaging effect when shooting a distant scene.
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 the 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 light ray spherical aberration diagram (mm), an astigmatism diagram (mm), and a distortion diagram (%);
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 a camera module provided in the present application;
fig. 12 is a schematic structural diagram of an electronic device provided 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 an orientation or positional relationship based on the orientation or positional relationship 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, an optical lens 100 is disclosed, 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. The first lens element L1 has positive refractive power, the second lens element L2 has positive refractive power, the third lens element L3 has negative refractive power, the fourth lens element L4 has positive refractive power or negative refractive power, the fifth lens element L5 has negative refractive power, and the sixth lens element L6 has positive refractive power. 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 order from the object side of the first lens L1, and is finally imaged on the imaging surface 101 of the optical lens 100.
Further, the object-side surface 11 of the first lens element L1 is convex at the paraxial region O and convex or concave at the circumference, and the image-side surface 12 of the first lens element L1 is concave at the paraxial region O and convex or concave at the circumference; the object-side surface 21 of the second lens element L2 is convex at the paraxial region O and convex or concave at the circumference, and the image-side surface 22 of the second lens element L2 is convex at the paraxial region O and convex or concave at the circumference; the object-side surface 31 of the third lens element L3 is convex or concave at the paraxial region O and convex or concave at the circumference, and the image-side surface 32 of the third lens element L3 is convex or concave at the paraxial region O and convex or concave at the circumference; the object-side surface 41 of the fourth lens element L4 is convex or concave at the paraxial region O and convex or concave at the circumference, and the image-side surface 42 of the fourth lens element L4 is concave at the paraxial region O and convex or concave at the circumference; the object-side surface 51 of the fifth lens element L5 is concave at the paraxial region O and convex or concave at the circumference, and the image-side surface 52 of the fifth lens element L5 is concave at the paraxial region O and convex or concave at the circumference; the object-side surface 61 of the sixth lens element L6 is convex or concave at a paraxial region O and convex or concave at a peripheral region, and the image-side surface 62 of the sixth lens element L6 is convex or concave at a paraxial region O and convex or concave at a peripheral region.
In some embodiments, when the optical lens 100 is applied to an electronic device such as a smartphone and an electronic watch, 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 be plastic, so that the complex surface shape of the lens is easier to process while the optical lens 100 is light and thin. It is understood that in some other embodiments, a glass material may be used if desired, and the embodiment is not particularly limited.
In some embodiments, the optical lens 100 further includes a right-angle prism 70, and the right-angle prism 70 is located between the object plane of the optical lens 100 and the object side surface 11 of the first lens L1. The rectangular prism 70 includes an incident surface 71, a reflecting surface 72, and an exit surface 73, and the exit surface 73 is disposed toward the image side. The light enters the right-angle prism 70 from the incident surface 71 of the right-angle prism 70, is reflected by the reflection surface 72, then exits from the exit surface 73 of the right-angle prism 70, and enters the first lens L1.
By additionally providing the rectangular prism 70 between the object plane of the optical lens 100 and the first lens L1, and forming the optical lens 100 as a periscopic optical lens, the overall length of the optical lens 100 can be reduced while the requirements of a large effective focal length and a small field angle are met, and the optical lens 100 can be designed in a compact size.
In some embodiments, the optical lens 100 further includes a stop 102, and the stop 102 may be an aperture stop 102 and/or a field stop 102, which may be disposed between the right angle prism 70 and the first lens L1. By way of example, the diaphragm 102 can be arranged between the exit surface 73 of the rectangular prism 70 and the object side 11 of the first lens L1. It is understood that the diaphragm 102 may be disposed between other lenses in other embodiments, and is adjusted according to actual needs, and the embodiment is not limited in particular.
Optionally, in order to improve the imaging quality, the optical lens 100 further includes an infrared filter 80, and the infrared filter 80 is disposed between the sixth lens L6 and the imaging surface 101 of the optical lens 100. It can be understood that the ir filter 80 can be selected as an ir cut ir filter, and the ir cut ir filter is selected for use, so as to improve the imaging quality of the optical lens 100 by filtering out the infrared light, so that the imaging better conforms to the visual experience of human eyes. It is understood that the infrared filter 80 may be made of an optical glass coating, a colored glass, or an infrared filter 80 made of other materials, which may be selected according to actual needs and is not particularly limited in this embodiment.
In some embodiments, the optical lens 100 satisfies the following relationship:
1deg/mm < FOV/TTL <4 deg/mm; wherein, the FOV is the maximum field angle of the optical lens 100, and the TTL is the distance from the object-side surface 11 of the first lens element L1 to the image plane 101 of the optical lens 100 on the optical axis O. When the optical lens 100 satisfies the above relation, the optical lens 100 can obtain a smaller field angle, that is, the incident angle of the incident light of the optical lens 100 is controlled within a reasonable range, so that when the optical lens 100 shoots a distant scene, a high-quality imaging effect can be obtained. When the ratio is higher than the upper limit, the angle of view of the optical lens 100 is too large, which is disadvantageous for the optical lens 100 to maintain the telephoto characteristic.
In some embodiments, the optical lens 100 satisfies the following relationship:
TTL/ImgH > 3.4; wherein, TTL is a distance from the object-side surface 11 of the first lens element L1 to the image plane 101 of the optical lens system 100 on the optical axis O, i.e. the total length of the optical lens system 100, and ImgH is a radius of the maximum effective image circle of the optical lens system 100. By controlling the ratio of the total length of the optical lens 100 to the radius of the maximum effective imaging circle of the optical lens 100, the total length of the optical lens 100 can be at least three times the radius of the maximum effective imaging circle of the optical lens 100, so that the layout of each lens of the optical lens 100 is more reasonable, and the optical lens 100 can obtain a high-quality imaging effect when a distant scene is shot. When the ratio is higher than the upper limit, the radius of the maximum effective imaging circle of the optical lens 100 is too small, so that the optical lens cannot be matched with a high-pixel chip, and the imaging quality of the optical lens 100 is reduced.
In some embodiments, the optical lens 100 satisfies the following relationship:
SD11/SD62> 1; SD11 is the maximum effective half aperture of the object-side surface 11 of the first lens element L1, and SD62 is the maximum effective half aperture of the image-side surface 62 of the sixth lens element L6. As the first lens and the last lens from the object side of the optical lens 100, the ratio of the effective half aperture of the object-side surface 11 of the first lens L1 to the effective half aperture of the image-side surface 62 of the sixth lens L6 can reflect the aperture sizes of the front end and the rear end of the lens barrel adapted to the optical lens 100, and when the above relation is satisfied, the ratio can be controlled within a reasonable range, and the aperture of the first lens L1 is larger than the aperture of the sixth lens L6, so that the diameter size of the front port of the lens barrel of the optical lens 100 is larger than that of the rear port, which is helpful for improving the effective focal length of the optical lens 100, and making the details of the focused distant scene more prominent, so as to achieve a good imaging effect on the distant scene.
In some embodiments, the optical lens 100 satisfies the following relationship:
2.5mm < f/Fno <5.5 mm; where f is the effective focal length of the optical lens 100, and Fno is the f-number of the optical lens 100. When the relationship between the effective focal length and the f-number of the optical lens 100 satisfies the above relational expression, the design requirement of the optical lens 100 for realizing a large aperture and simultaneously considering a long focal length can be satisfied, that is, the light incident amount of the optical lens 100 is increased by the design of the large aperture of the optical lens 100, so as to realize clear imaging of the optical lens 100; meanwhile, the long-focus characteristic of the optical lens 100 can meet the requirement of the optical lens 100 on clear imaging of a distant scene. When the ratio is higher than the upper limit, the optical lens 100 cannot give consideration to both the telephoto characteristic and the aperture, so that the aperture of the optical lens 100 is too large, and the light passing amount of the optical lens 100 is too large, thereby causing overexposure during imaging of the optical lens 100; when the ratio is lower than the lower limit, the effective focal length of the optical lens 100 becomes small, which may reduce the telephoto characteristic of the optical lens 100, and further may not realize clear imaging of a distant scene.
In some embodiments, the optical lens 100 satisfies the following relationship:
1< (| T34| + | T45|)/CT4< 3.5; t34 is the distance between the image-side surface 32 of the third lens element L3 and the object-side surface 41 of the fourth lens element L4 on the optical axis O, T45 is the distance between the image-side surface 42 of the fourth lens element L4 and the object-side surface 51 of the fifth lens element L5 on the optical axis O, and CT4 is the distance between the object-side surface 41 of the fourth lens element L4 and the image-side surface 42 of the fourth lens element L4 on the optical axis O. When the optical lens 100 satisfies the above relationship, the gap between the third lens L3, the fourth lens L4, and the fifth lens L5, and the thickness of the fourth lens L4 on the optical axis O can be reasonably configured, and a smaller incident angle and an exit angle can be maintained, so as to reduce the angle difference between the marginal rays when the marginal rays enter the third lens L3 and exit the fifth lens L5, further slow down the direction change of the incident rays after entering the optical lens 100, avoid the occurrence of astigmatism of the optical lens 100, and further improve the imaging quality of the optical lens 100.
In some embodiments, the optical lens 100 satisfies the following relationship:
T23/T12< 1; t23 is the distance between the image-side surface 22 of the second lens element L2 and the object-side surface 31 of the third lens element L3 on the optical axis O, and T12 is the distance between the image-side surface 12 of the first lens element L1 and the object-side surface 21 of the second lens element L2 on the optical axis O. Through the restriction of the above relation to the first lens L1, the second lens L2 and the third lens L3, the layout of the first lens L1, the second lens L2 and the third lens L3 can be more reasonable, that is, the gap between the first lens L1, the second lens L2 and the third lens L3 is more reasonable, so as to meet the requirement of miniaturization design of the optical lens 100, meanwhile, the reasonable gap configuration can reserve enough space for the subsequent assembly work of the optical lens 100, and further improve the lens molding yield and the assembly yield of the optical lens 100.
In some embodiments, the optical lens 100 satisfies the following relationship:
V3-V1| > 30; where V3 is the abbe number of the third lens L3, and V1 is the abbe number of the first lens L1. Since the material of each lens has a large influence on the lens characteristics, and the abbe number of the lens directly reflects the dispersion capability of the lens, in order to better control the performance of the optical lens 100, the relation between the abbe numbers of the first lens L1 and the third lens L3 is controlled to guide the material selection of the first lens L1 and the third lens L3, so as to improve the chromatic aberration correction capability of the optical lens 100, and improve the imaging quality of the optical lens 100.
In some embodiments, the optical lens 100 satisfies the following relationship:
(n1+n3)/f<0.36mm-1(ii) a Where n1 is the refractive index of the first lens L1 at the reference wavelength of 587.6nm, n3 is the refractive index of the third lens L3 at the reference wavelength of 587.6nm, and f is the effective focal length of the optical lens 100. By reasonably distributing the relationship between the refractive powers of the first lens element L1 and the third lens element L3 and the effective focal length of the optical lens 100, the chromatic aberration and the spherical aberration of the optical lens 100 can be reduced to improve the imaging quality of the optical lens 100, and at the same time, by limiting the refractive powers of the first lens element L1 and the third lens element L3, the ability of the optical lens 100 to converge light rays can be improved to improve the imaging sharpness of the optical lens 100. When the ratio is higher than the upper limit, the focal length of the optical lens 100 is insufficient, and it is difficult to have good telephoto performance.
In some embodiments, the optical lens 100 satisfies the following relationship:
0.5< DL/TTL < 0.7; DL is a distance between the object-side surface 11 of the first lens element L1 and the image-side surface 62 of the sixth lens element L6 on the optical axis O, and TTL is a distance between the object-side surface 11 of the first lens element L1 and the image plane 101 of the optical lens system 100 on the optical axis O. When the optical lens 100 satisfies the above relation, the layout structure of each lens of the optical lens 100 may be more reasonable, and then the space of the optical lens 100 occupied by the first lens L1 to the sixth lens L6 of the optical lens 100 is reduced, so as to satisfy the miniaturization design requirement of the optical lens 100, and simultaneously, the optical lens 100 may be better adapted to the structural layout of the camera module.
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, in which the optical lens 100 includes, in order from an object side to an image side along an optical axis O, a right-angled prism 70, a stop 102, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, and an infrared filter 80, wherein the right-angled prism 70 and the infrared filter 80 are both made of glass, and the first lens L1 to the sixth lens L6 are all made of plastic.
Further, the first lens element L1 with positive refractive power, the second lens element L2 with positive refractive power, the third lens element L3 with negative refractive power, the fourth lens element L4 with negative refractive power, the fifth lens element L5 with negative refractive power and the sixth lens element L6 with positive refractive power. The object-side surface 11 and the image-side surface 12 of the first lens element L1 are respectively convex and concave at the optical axis O, and the object-side surface 11 and the image-side surface 12 of the first lens element L1 are respectively convex and concave at the circumference; the object-side surface 21 and the image-side surface 22 of the second lens element L2 are convex at the optical axis O, and the object-side surface 21 and the image-side surface 22 of the second lens element L2 are convex at the circumference; the object-side surface 31 and the image-side surface 32 of the third lens element L3 are respectively convex and concave at the optical axis O, and the object-side surface 31 and the image-side surface 32 of the third lens element L3 are respectively convex and concave at the circumference; the object-side surface 41 and the image-side surface 42 of the fourth lens element L4 are respectively convex and concave at the optical axis O, and the object-side surface 41 and the image-side surface 42 of the fourth lens element L4 are respectively convex and concave at the circumference; the object-side surface 51 and the image-side surface 52 of the fifth lens element L5 are both concave at the optical axis O, and the object-side surface 51 and the image-side surface 52 of the fifth lens element L5 are respectively convex and concave at the circumference; the object-side surface 61 and the image-side surface 62 of the sixth lens element L6 are convex on the optical axis O, and the object-side surface 61 and the image-side surface 62 of the sixth lens element L6 are convex on the circumference.
Specifically, taking as an example that the effective focal length f of the optical lens 100 is 11.8mm, the aperture size Fno is 2.6, the field angle FOV of the optical lens 100 is 25deg, the total length TTL of the optical lens 100 is 11.1mm, the radius ImgH of the maximum effective imaging circle of the optical lens 100 is 2.65mm, and the distance DL between the object-side surface 11 of the first lens L1 of the optical lens 100 and the image-side surface 62 of the sixth lens L6 on the optical axis O is 7.15mm, the other parameters of the optical lens 100 are given in table 1 below. 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 surface number is the object side surface of the lens, and the surface with the larger surface number is the image side surface of the lens, and for example, the surface numbers 2 and 3 correspond to the object side surface and the image side surface of the first lens L1, respectively. The radius Y in table 1 is the radius of curvature of the object-side surface or the image-side surface of the corresponding surface number at the optical axis 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 surface to the image side surface of the last lens of the first lens L1 is defined as 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 a positive value, 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 in Table 1 is 587.6nm, and the reference wavelength of the focal length is 555 nm.
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 O direction; c is the curvature at the optical axis O of the aspheric surface, c ═ 1/Y (i.e., paraxial curvature c is the inverse of the radius of curvature Y in table 1); k is a conic coefficient; ai is a correction coefficient of the i-th order of the aspherical surface. Table 2 below shows the high-order term coefficients a4, a6, A8, a10, a12, a14, and a16 that can be used for each aspherical mirror surface in the first embodiment.
TABLE 1
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 wavelengths of 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 a meridional image plane 101 curvature T and a sagittal image plane 101 curvature S, and as can be seen from (B) in fig. 2, 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
A schematic structural diagram of an optical lens 100 disclosed in the second embodiment of the present application is shown in fig. 3, in which the optical lens 100 includes, in order from an object side to an image side along an optical axis O, a right-angled prism 70, a stop 102, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, and an infrared filter 80, wherein the right-angled prism 70 and the infrared filter 80 are both made of glass, and the first lens L1 to the sixth lens L6 are all made of plastic.
Further, the first lens element L1 with positive refractive power, the second lens element L2 with positive refractive power, the third lens element L3 with negative refractive power, the fourth lens element L4 with negative refractive power, the fifth lens element L5 with negative refractive power and the sixth lens element L6 with positive refractive power. The object-side surface 11 and the image-side surface 12 of the first lens element L1 are respectively convex and concave at the optical axis O, and the object-side surface 11 and the image-side surface 12 of the first lens element L1 are respectively convex and concave at the circumference; the object-side surface 21 and the image-side surface 22 of the second lens element L2 are convex at the optical axis O, and the object-side surface 21 and the image-side surface 22 of the second lens element L2 are convex at the circumference; the object-side surface 31 and the image-side surface 32 of the third lens element L3 are respectively convex and concave at the optical axis O, and the object-side surface 31 and the image-side surface 32 of the third lens element L3 are respectively convex and concave at the circumference; the object-side surface 41 and the image-side surface 42 of the fourth lens element L4 are respectively convex and concave at the optical axis O, and the object-side surface 41 and the image-side surface 42 of the fourth lens element L4 are respectively convex and concave at the circumference; the object-side surface 51 and the image-side surface 52 of the fifth lens element L5 are both concave at the optical axis O, and the object-side surface 51 and the image-side surface 52 of the fifth lens element L5 are respectively convex and concave at the circumference; the object-side surface 61 and the image-side surface 62 of the sixth lens element L6 are respectively convex and concave at the optical axis O, and the object-side surface 61 and the image-side surface 62 of the sixth lens element L6 are respectively convex and concave at the circumference.
Specifically, taking as an example that the effective focal length f of the optical lens 100 is 9.45mm, the aperture size Fno is 2.6, the field angle FOV of the optical lens 100 is 30.8deg, the total length TTL of the optical lens 100 is 9.3mm, the radius ImgH of the maximum effective imaging circle of the optical lens 100 is 2.65mm, and the distance DL between the object-side surface 11 of the first lens L1 of the optical lens 100 and the image-side surface 62 of the sixth lens L6 on the optical axis O is 6.05mm, other parameters of the optical lens 100 are given in table 3 below. The definitions of the parameters can be obtained from the description of the foregoing embodiments, and are not repeated herein. It is understood that the units of the radius Y, the thickness and the focal length in table 3 are all mm, and the reference wavelength of the refractive index and the abbe number in table 3 is 587.6nm, and the reference wavelength of the focal length is 555 nm. In the second embodiment, the object-side surface and the image-side surface of any one of the first lens element L1 to the sixth lens element L6 are aspheric, and the method for calculating the surface shape x of each aspheric lens can be found in the description of the foregoing embodiments, which is not repeated herein. Table 4 below shows the high-order term coefficients a4, a6, A8, a10, a12, a14, and a16 that can be used for each aspherical mirror surface in the second embodiment.
TABLE 3
TABLE 4
Referring to fig. 4, as can be seen from the light spherical aberration diagram (a) in fig. 4, the light astigmatism diagram (B) in fig. 4, and the distortion diagram (C) in fig. 4, the longitudinal spherical aberration, astigmatism, and distortion of the optical system 100 are well controlled, so that the optical system 100 of this embodiment has good imaging quality. In addition, as for the wavelengths corresponding to the curves in fig. 4 (a), fig. 4 (B), and fig. 4 (C), the contents described in the first embodiment with respect to fig. 2 (a), fig. 2 (B), and fig. 2 (C) may be referred to, and details thereof are not repeated herein.
Third embodiment
A schematic structural diagram of an optical lens 100 disclosed in the third embodiment of the present application is shown in fig. 5, in which the optical lens 100 includes, in order from an object side to an image side along an optical axis O, a right-angled prism 70, a stop 102, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, and an infrared filter 80, wherein the right-angled prism 70 and the infrared filter 80 are both made of glass, and the first lens L1 to the sixth lens L6 are all made of plastic.
Further, the first lens element L1 with positive refractive power, the second lens element L2 with positive refractive power, the third lens element L3 with negative refractive power, the fourth lens element L4 with negative refractive power, the fifth lens element L5 with negative refractive power and the sixth lens element L6 with positive refractive power. The object-side surface 11 and the image-side surface 12 of the first lens element L1 are respectively convex and concave at the optical axis O, and the object-side surface 11 and the image-side surface 12 of the first lens element L1 are respectively convex and concave at the circumference; the object-side surface 21 and the image-side surface 22 of the second lens element L2 are convex at the optical axis O, and the object-side surface 21 and the image-side surface 22 of the second lens element L2 are convex at the circumference; the object-side surface 31 and the image-side surface 32 of the third lens element L3 are respectively convex and concave at the optical axis O, and the object-side surface 31 and the image-side surface 32 of the third lens element L3 are respectively convex and concave at the circumference; the object-side surface 41 and the image-side surface 42 of the fourth lens element L4 are respectively convex and concave at the optical axis O, and the object-side surface 41 and the image-side surface 42 of the fourth lens element L4 are respectively convex and concave at the circumference; the object-side surface 51 and the image-side surface 52 of the fifth lens element L5 are both concave at the optical axis O, and the object-side surface 51 and the image-side surface 52 of the fifth lens element L5 are respectively convex and concave at the circumference; the object-side surface 61 and the image-side surface 62 of the sixth lens element L6 are convex on the optical axis O, and the object-side surface 61 and the image-side surface 62 of the sixth lens element L6 are convex on the circumference.
Specifically, taking as an example that the effective focal length f of the optical lens 100 is 14.6mm, the aperture size Fno is 2.8, the field angle FOV of the optical lens 100 is 20deg, the total length TTL of the optical lens 100 is 13.6mm, the radius ImgH of the maximum effective imaging circle of the optical lens 100 is 2.65mm, and the distance DL between the object-side surface 11 of the first lens L1 of the optical lens 100 and the image-side surface 62 of the sixth lens L6 on the optical axis O is 8.5mm, the other parameters of the optical lens 100 are given in table 5 below. The definitions of the parameters can be obtained from the description of the foregoing embodiments, and are not repeated herein. It is understood that the units of the radius Y, the thickness and the focal length in table 5 are mm, and the reference wavelength of the refractive index and the abbe number in table 5 is 587.6nm, and the reference wavelength of the focal length is 555 nm. In the third embodiment, the object-side surface and the image-side surface of any one of the first lens element L1 through the sixth lens element L6 are aspheric, and the method for calculating the surface shape x of each aspheric lens can be found in the foregoing description of the embodiments, which is not repeated herein. Table 6 below shows the high-order term coefficients a4, a6, A8, a10, a12, a14, and a16 that can be used for each aspherical mirror surface in the third embodiment.
TABLE 5
TABLE 6
Referring to fig. 6, as can be seen from the light spherical aberration diagram (a) in fig. 6, the light astigmatism diagram (B) in fig. 6, and the distortion diagram (C) in fig. 6, the longitudinal spherical aberration, astigmatism, and distortion of the optical system 100 are well controlled, so that the optical system 100 of this embodiment has good imaging quality. In addition, as for the wavelengths corresponding to the curves in fig. 6 (a), fig. 6 (B), and fig. 6 (C), the contents described in the first embodiment with respect to fig. 2 (a), fig. 2 (B), and fig. 2 (C) may be referred to, and details thereof are not repeated herein.
Fourth embodiment
A schematic structural diagram of an optical lens 100 disclosed in the fourth embodiment of the present application is shown in fig. 7, in which the optical lens 100 includes, in order from an object side to an image side along an optical axis O, a right-angled prism 70, a stop 102, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, and an infrared filter 80, wherein the right-angled prism 70 and the infrared filter 80 are both made of glass, and the first lens L1 to the sixth lens L6 are all made of plastic.
Further, the first lens element L1 with positive refractive power, the second lens element L2 with positive refractive power, the third lens element L3 with negative refractive power, the fourth lens element L4 with negative refractive power, the fifth lens element L5 with negative refractive power and the sixth lens element L6 with positive refractive power. The object-side surface 11 and the image-side surface 12 of the first lens element L1 are respectively convex and concave at the optical axis O, and the object-side surface 11 and the image-side surface 12 of the first lens element L1 are respectively convex and concave at the circumference; the object-side surface 21 and the image-side surface 22 of the second lens element L2 are convex at the optical axis O, and the object-side surface 21 and the image-side surface 22 of the second lens element L2 are convex at the circumference; the object-side surface 31 and the image-side surface 32 of the third lens element L3 are respectively convex and concave at the optical axis O, and the object-side surface 31 and the image-side surface 32 of the third lens element L3 are respectively convex and concave at the circumference; the object-side surface 41 and the image-side surface 42 of the fourth lens element L4 are both concave at the optical axis O, and the object-side surface 41 and the image-side surface 42 of the fourth lens element L4 are both concave at the circumference; the object-side surface 51 and the image-side surface 52 of the fifth lens element L5 are both concave at the optical axis O, and the object-side surface 51 and the image-side surface 52 of the fifth lens element L5 are respectively convex and concave at the circumference; the object-side surface 61 and the image-side surface 62 of the sixth lens element L6 are concave and convex, respectively, along the optical axis O, and the object-side surface 61 and the image-side surface 62 of the sixth lens element L6 are both convex along the circumference.
Specifically, taking as an example that the effective focal length f of the optical lens 100 is 15.54mm, the aperture size Fno is 3.2, the field angle FOV of the optical lens 100 is 19deg, the total length TTL of the optical lens 100 is 14.5mm, the radius ImgH of the maximum effective imaging circle of the optical lens 100 is 2.65mm, and the distance DL between the object-side surface 11 of the first lens L1 of the optical lens 100 and the image-side surface 62 of the sixth lens L6 on the optical axis O is 8.3mm, the other parameters of the optical lens 100 are given in table 7 below. The definitions of the parameters can be obtained from the description of the foregoing embodiments, and are not repeated herein. It is understood that the units of the radius Y, the thickness and the focal length in table 7 are mm, and the reference wavelength of the refractive index and the abbe number in table 7 is 587.6nm, and the reference wavelength of the focal length is 555 nm. In the fourth embodiment, the object-side surface and the image-side surface of any one of the first lens element L1 to the sixth lens element L6 are aspheric, and the method for calculating the surface shape x of each aspheric lens can be found in the description of the foregoing embodiments, which is not repeated herein. Table 8 below shows the high-order term coefficients a4, a6, A8, a10, a12, a14, and a16 that can be used for each aspherical mirror surface in the fourth embodiment.
TABLE 7
TABLE 8
Referring to fig. 8, as can be seen from the light spherical aberration diagram (a) in fig. 8, the light astigmatism diagram (B) in fig. 8, and the distortion diagram (C) in fig. 8, the longitudinal spherical aberration, astigmatism, and distortion of the optical system 100 are well controlled, so that the optical system 100 of this embodiment has good imaging quality. In addition, as for the wavelengths corresponding to the curves in fig. 8 (a), fig. 8 (B), and fig. 8 (C), the contents described in the first embodiment with respect to fig. 2 (a), fig. 2 (B), and fig. 2 (C) may be referred to, and details thereof are not repeated herein.
Fifth embodiment
A schematic structural diagram of an optical lens 100 disclosed in the fifth embodiment of the present application is shown in fig. 9, in which the optical lens 100 includes, in order from an object side to an image side along an optical axis O, a right-angled prism 70, a stop 102, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, and an infrared filter 80, wherein the right-angled prism 70 and the infrared filter 80 are both made of glass, and the first lens L1 to the sixth lens L6 are all made of plastic.
Further, the first lens element L1 has positive refractive power, the second lens element L2 has positive refractive power, the third lens element L3 has negative refractive power, the fourth lens element L4 has positive refractive power, the fifth lens element L5 has negative refractive power, and the sixth lens element L6 has positive refractive power. The object-side surface 11 and the image-side surface 12 of the first lens element L1 are respectively convex and concave at the optical axis O, and the object-side surface 11 and the image-side surface 12 of the first lens element L1 are respectively convex and concave at the circumference; the object-side surface 21 and the image-side surface 22 of the second lens element L2 are convex at the optical axis O, and the object-side surface 21 and the image-side surface 22 of the second lens element L2 are convex at the circumference; the object-side surface 31 and the image-side surface 32 of the third lens element L3 are respectively convex and concave at the optical axis O, and the object-side surface 31 and the image-side surface 32 of the third lens element L3 are respectively convex and concave at the circumference; the object-side surface 41 and the image-side surface 42 of the fourth lens element L4 are respectively convex and concave at the optical axis O, and the object-side surface 41 and the image-side surface 42 of the fourth lens element L4 are respectively convex and concave at the circumference; the object-side surface 51 and the image-side surface 52 of the fifth lens element L5 are both concave at the optical axis O, and the object-side surface 51 and the image-side surface 52 of the fifth lens element L5 are respectively convex and concave at the circumference; the object-side surface 61 and the image-side surface 62 of the sixth lens element L6 are convex on the optical axis O, and the object-side surface 61 and the image-side surface 62 of the sixth lens element L6 are convex on the circumference.
Specifically, taking as an example that the effective focal length f of the optical lens 100 is 9.1mm, the aperture size Fno is 3.4, the field angle FOV of the optical lens 100 is 32deg, the total length TTL of the optical lens 100 is 9.1mm, the radius ImgH of the maximum effective imaging circle of the optical lens 100 is 2.65mm, and the distance DL between the object-side surface 11 of the first lens L1 of the optical lens 100 and the image-side surface 62 of the sixth lens L6 on the optical axis O is 6.02mm, the other parameters of the optical lens 100 are given in the following table 9. The definitions of the parameters can be obtained from the description of the foregoing embodiments, and are not repeated herein. It is understood that the units of the radius Y, the thickness and the focal length in table 9 are mm, and the reference wavelength of the refractive index and the abbe number in table 9 is 587.6nm, and the reference wavelength of the focal length is 555 nm. In the fifth embodiment, the object-side surface and the image-side surface of any one of the first lens element L1 through the sixth lens element L6 are aspheric, and the method for calculating the surface shape x of each aspheric lens can be found in the description of the foregoing embodiments, which is not repeated herein. Table 10 below shows the high-order term coefficients a4, a6, A8, a10, a12, a14, and a16 that can be used for each aspherical mirror surface in the fifth embodiment.
TABLE 9
Watch 10
Referring to fig. 10, as can be seen from the light spherical aberration diagram (a) in fig. 10, the light astigmatism diagram (B) in fig. 10, and the distortion diagram (C) in fig. 10, the longitudinal spherical aberration, astigmatism, and distortion of the optical system 100 are well controlled, so that the optical system 100 of this embodiment has good imaging quality. In addition, as for the wavelengths corresponding to the curves in fig. 10 (a), fig. 10 (B), and fig. 10 (C), the contents described in the first embodiment with respect to fig. 2 (a), fig. 2 (B), and fig. 2 (C) may be referred to, and details thereof are not repeated herein.
Referring to table 11, table 11 summarizes the ratios of the relations in the first embodiment to the fifth embodiment of the present application.
TABLE 11
Referring to fig. 11, the present application further discloses a camera module 200, where the camera module 200 includes an image sensor 201 and the optical lens 100 according to any of the first to fifth embodiments, the image sensor 201 is disposed at an image side of the optical lens 100, and the image sensor 201 is configured to convert an optical signal corresponding to a subject into an image signal, which is not described herein again. It can be understood that the camera module 200 with the optical lens 100 can realize high-quality imaging of distant scenes while realizing the design requirement of miniaturization.
Referring to fig. 12, the present application further discloses an electronic device 300, wherein the electronic device 300 includes a housing and the camera module 200 as described above, and the camera module 200 is disposed on the housing. The electronic device 300 may be, but is not limited to, a cell phone, a tablet, a laptop, a smart watch, a monitor, and the like. It can be understood that the electronic device 300 with the camera module 200 can realize high-quality imaging of distant scenes while realizing the design requirement of miniaturization.
The optical lens, the camera module and the electronic device disclosed in the embodiments of the present invention are described in detail above, and the principle and the embodiments of the present invention are explained in detail herein by applying specific examples, and the description of the embodiments above is only used to help understanding the optical lens, the camera module and the electronic device and the core ideas thereof; 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 positive refractive power has a convex object-side surface at a paraxial region thereof and a convex image-side surface at a paraxial region thereof;
the third lens element with negative refractive power;
the fourth lens element with refractive power has a concave image-side surface at paraxial region;
the fifth lens element with negative refractive power has a concave object-side surface at a paraxial region thereof and a concave image-side surface at a paraxial region thereof;
the sixth lens element with positive refractive power;
the optical lens satisfies the following relation:
1deg/mm<FOV/TTL<4deg/mm；
the FOV is the maximum field angle of the optical lens, and the TTL is the distance from the object side surface of the first lens to the imaging surface of the optical lens on the optical axis.
2. An optical lens according to claim 1, wherein the optical lens satisfies the following relation:
TTL/ImgH>3.4；
wherein ImgH is the radius of the maximum effective imaging circle of the optical lens.
3. An optical lens according to claim 1, wherein the optical lens satisfies the following relation:
SD11/SD62>1；
wherein SD11 is the maximum effective half aperture of the object-side surface of the first lens element, and SD62 is the maximum effective half aperture of the image-side surface of the sixth lens element.
4. An optical lens according to claim 1, wherein the optical lens satisfies the following relation:
2.5mm<f/Fno<5.5mm；
wherein f is an effective focal length of the optical lens, and Fno is an f-number of the optical lens.
5. An optical lens according to claim 1, wherein the optical lens satisfies the following relation:
1<(|T34|+|T45|)/CT4<3.5；
wherein T34 is a distance between an image-side surface of the third lens element and an object-side surface of the fourth lens element on the optical axis, T45 is a distance between the image-side surface of the fourth lens element and an object-side surface of the fifth lens element on the optical axis, and CT4 is a distance between the object-side surface of the fourth lens element and the image-side surface of the fourth lens element on the optical axis.
6. An optical lens according to claim 1, wherein the optical lens satisfies the following relation:
T23/T12<1；
wherein T23 is a distance between an image-side surface of the second lens element and an object-side surface of the third lens element on the optical axis, and T12 is a distance between an image-side surface of the first lens element and an object-side surface of the second lens element on the optical axis.
7. An optical lens according to claim 1, wherein the optical lens satisfies the following relation:
(n1+n3)/f<0.36mm-1；
wherein n1 is a refractive index of the first lens at a reference wavelength of 587.6nm, n3 is a refractive index of the third lens at a reference wavelength of 587.6nm, and f is an effective focal length of the optical lens.
8. An optical lens according to claim 1, wherein the optical lens satisfies the following relation:
0.5<DL/TTL<0.7；
and DL is the distance between the object side surface of the first lens and the image side surface of the sixth lens on the optical axis.
9. The utility model provides a module of making a video recording which characterized in that: the camera module comprises an image sensor and an optical lens according to any one of claims 1 to 8, wherein the image sensor is arranged on the image side of the optical lens.
10. An electronic device, characterized in that: the electronic device comprises a housing and the camera module of claim 9, the camera module being disposed on the housing.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2024055279A1 (en) * | 2022-09-16 | 2024-03-21 | Guangdong Oppo Mobile Telecommunications Corp., Ltd. | Imaging lens assembly, camera module and imaging device |
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| JP2016014759A (en) * | 2014-07-02 | 2016-01-28 | 株式会社オプトロジック | Imaging lens |
| JP2016065954A (en) * | 2014-09-24 | 2016-04-28 | 日立マクセル株式会社 | Imaging lens system and imaging apparatus |
| CN109541778A (en) * | 2017-09-22 | 2019-03-29 | 大立光电股份有限公司 | Imaging lens assembly, image capturing device and electronic device |
| CN112147755A (en) * | 2019-06-27 | 2020-12-29 | 华为技术有限公司 | Optical lens group, camera and terminal equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016014759A (en) * | 2014-07-02 | 2016-01-28 | 株式会社オプトロジック | Imaging lens |
| JP2016065954A (en) * | 2014-09-24 | 2016-04-28 | 日立マクセル株式会社 | Imaging lens system and imaging apparatus |
| CN109541778A (en) * | 2017-09-22 | 2019-03-29 | 大立光电股份有限公司 | Imaging lens assembly, image capturing device and electronic device |
| CN112147755A (en) * | 2019-06-27 | 2020-12-29 | 华为技术有限公司 | Optical lens group, camera and terminal equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2024055279A1 (en) * | 2022-09-16 | 2024-03-21 | Guangdong Oppo Mobile Telecommunications Corp., Ltd. | Imaging lens assembly, camera module and imaging device |
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