CN115201998A - Optical lens and electronic device - Google Patents

Optical lens and electronic device Download PDF

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Publication number
CN115201998A
CN115201998A CN202110400272.0A CN202110400272A CN115201998A CN 115201998 A CN115201998 A CN 115201998A CN 202110400272 A CN202110400272 A CN 202110400272A CN 115201998 A CN115201998 A CN 115201998A
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CN
China
Prior art keywords
lens
optical
image
optical lens
convex
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Pending
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CN202110400272.0A
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Chinese (zh)
Inventor
徐超
邱光
姚波
岳国强
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Ningbo Sunny Automotive Optech Co Ltd
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Ningbo Sunny Automotive Optech Co Ltd
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Priority to CN202110400272.0A priority Critical patent/CN115201998A/en
Publication of CN115201998A publication Critical patent/CN115201998A/en
Pending legal-status Critical Current

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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
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G02B13/06—Panoramic objectives; So-called "sky lenses" including panoramic objectives having reflecting surfaces
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G02B13/18—Optical objectives specially designed for the purposes specified below with lenses having one or more non-spherical faces, e.g. for reducing geometrical aberration

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Lenses (AREA)

Abstract

The application discloses an optical lens and an electronic device including the same. The optical lens sequentially comprises the following components from an object side to an image side along an optical axis: the first lens with negative focal power has a convex object-side surface and a concave image-side surface; a second lens having a negative refractive power, the object side surface of which is concave; a third lens with positive focal power, wherein the object side surface of the third lens is a convex surface, and the image side surface of the third lens is a convex surface; a fourth lens having an optical power; a fifth lens having optical power; and a sixth lens having positive refractive power, the object-side surface of which is convex.

Description

Optical lens and electronic device
Technical Field
The present disclosure relates to the field of optical elements, and more particularly, to an optical lens and an electronic apparatus.
Background
With the improvement of the imaging quality of the optical lens, the optical lens is widely applied in various fields, for example, the optical lens plays an irreplaceable role in various fields such as intelligent detection, security monitoring, smart phones and automobile auxiliary driving. Meanwhile, lens manufacturers in various fields begin to devote much time and effort to the development of lens performance without losing their own competitiveness.
In recent years, with the progress of science and technology and the improvement of living standard of people, automobiles gradually become main vehicles for people to go out in daily life, and particularly, in the process of driving the automobiles, the automobile auxiliary driving system plays an important role in safe driving. Meanwhile, auxiliary driving systems such as a vehicle-mounted reversing visual system, a vehicle-mounted driving recorder, an automatic parking and panoramic parking system, a road finding system and the like are developed at a high speed, and the optical lens is more and more widely applied to the automobile auxiliary driving system.
The lens sensor is one of main components for acquiring external information in the driving assistance system, and can acquire effective information of the surrounding environment during driving. How to obtain the most comprehensive external information through a small data volume while reducing the production cost is one of the main research directions of many lens manufacturers at present.
In addition, with the increase of applications of optical lenses, the optical lenses are gradually developed to be able to normally work in a visible light environment in the daytime and to be able to normally work in an infrared light environment at night. However, when the conventional optical lens is switched from a visible light environment to an infrared light environment, the conventional optical lens needs to be switched from a chip suitable for visible light to a chip suitable for infrared, and further needs to perform secondary focusing, so that the process is complex. Therefore, how to enable the lens to work normally in both visible light and infrared light environments is one of the problems that lens manufacturers need to solve urgently, such as avoiding secondary focusing, simplifying the process and saving the cost.
Disclosure of Invention
The present application provides an optical lens, which includes, in order from an object side to an image side along an optical axis: the first lens with negative focal power has a convex object-side surface and a concave image-side surface; a second lens having a negative refractive power, the object side surface of which is concave; a third lens with positive focal power, wherein the object side surface of the third lens is a convex surface, and the image side surface of the third lens is a convex surface; a fourth lens having an optical power; a fifth lens having optical power; and a sixth lens having a positive refractive power, an object-side surface of which is convex.
In one embodiment, the image side surface of the second lens is concave.
In one embodiment, the image-side surface of the second lens is convex.
In one embodiment, the fourth lens has positive optical power, and the object-side surface of the fourth lens is a convex surface and the image-side surface of the fourth lens is a convex surface.
In one embodiment, the fourth lens has a negative power and has a concave object-side surface and a concave image-side surface.
In one embodiment, the fifth lens element has a negative power and has a concave object-side surface and a concave image-side surface.
In one embodiment, the fifth lens element has positive optical power, and the object side surface of the fifth lens element is convex and the image side surface of the fifth lens element is convex.
In one embodiment, the image-side surface of the sixth lens element is convex.
In one embodiment, the image-side surface of the sixth lens element is concave.
In one embodiment, the fourth lens and the fifth lens are cemented to form a cemented lens.
In one embodiment, at least one of the second lens, the fourth lens, the fifth lens, and the sixth lens has an aspherical mirror surface.
In one embodiment, the optical lens further includes a stop disposed between the third lens and the fourth lens.
In one embodiment, a distance TTL from a center of an object-side surface of the first lens to an imaging surface of the optical lens on the optical axis, an image height H corresponding to a maximum field angle FOV of the optical lens, and a maximum field angle of the optical lens may satisfy: TTL/H/FOV is less than or equal to 0.04.
In one embodiment, the radius of curvature R1 of the object-side surface of the first lens and the radius of curvature R2 of the image-side surface of the first lens may satisfy: the ratio of R1/R2 is less than or equal to 10.
In one embodiment, the maximum field angle FOV of the optical lens, the maximum clear aperture D of the object-side surface of the first lens corresponding to the maximum field angle of the optical lens, and the image height H corresponding to the maximum field angle of the optical lens may satisfy: D/H/FOV is less than or equal to 0.02.
In one embodiment, a distance BFL on the optical axis from the center of the image-side surface of the sixth lens element to the imaging surface of the optical lens under visible light and a distance TTL on the optical axis from the center of the object-side surface of the first lens element to the imaging surface of the optical lens may satisfy: BFL/TTL is more than or equal to 0.1.
In one embodiment, the effective focal length F4 of the fourth lens and the effective focal length F5 of the fifth lens may satisfy: the absolute value of F4/F5 is more than or equal to 0.75 and less than or equal to 2.
In one embodiment, the maximum field angle FOV of the optical lens, the total effective focal length F of the optical lens in visible light, and the image height H corresponding to the maximum field angle of the optical lens may satisfy: (FOV F)/H.gtoreq.40.
In one embodiment, a radius of curvature R8 of the object-side surface of the fourth lens and a radius of curvature R9 of the image-side surface of the fourth lens may satisfy: and the | R8/R9| is more than or equal to 1.5.
In one embodiment, a distance d34 on the optical axis from the center of the image-side surface of the third lens to the center of the object-side surface of the fourth lens and a distance TTL on the optical axis from the center of the object-side surface of the first lens to the imaging surface of the optical lens may satisfy: d34/TTL is less than or equal to 0.1.
In one embodiment, the total effective focal length F of the optical lens under visible light and the radius of curvature R1 of the object side surface of the first lens may satisfy: and the F/R1 is more than or equal to 0.2.
In one embodiment, a distance TTL between a center of an object side surface of the first lens and an imaging surface of the optical lens on the optical axis and a total effective focal length F of the optical lens under visible light may satisfy: TTL/F is less than or equal to 5.8.
In one embodiment, the total effective focal length F of the optical lens under visible light, the radius of curvature R3 of the object-side surface of the second lens, and the radius of curvature R4 of the image-side surface of the second lens may satisfy: the ratio of F/R3 + F/R4 is less than or equal to 2.5.
In one embodiment, a distance d34 on the optical axis from the center of the image-side surface of the third lens to the center of the object-side surface of the fourth lens and a distance BFL on the optical axis from the center of the image-side surface of the sixth lens to the imaging surface of the optical lens under visible light may satisfy: (d 34 xBFL)/(d 34+ BFL) is less than or equal to 0.8.
In one embodiment, the maximum clear aperture D of the object-side surface of the first lens, where the total effective focal length F of the optical lens in visible light corresponds to the maximum field angle of the optical lens, may satisfy: F/D is more than or equal to 0 and less than or equal to 0.7.
In one embodiment, the radius of curvature R5 of the object-side surface of the third lens and the radius of curvature R6 of the image-side surface of the third lens may satisfy: the ratio of (R5-R6)/(R5 + R6) is more than or equal to-15 and less than or equal to-0.5.
In one embodiment, a radius of curvature R1 of an object-side surface of the first lens, a radius of curvature R2 of an image-side surface of the first lens, and a center thickness d1 of the first lens on the optical axis may satisfy: R1/(R2 + d 1) is less than or equal to 4.
In one embodiment, the effective focal length F2 of the second lens and the total effective focal length F of the optical lens under visible light may satisfy: F2/F is less than or equal to-4.8 and less than or equal to 0.
In one embodiment, the radius of curvature R3 of the object-side surface of the second lens, the radius of curvature R4 of the image-side surface of the second lens, and the center thickness d3 of the second lens on the optical axis may satisfy: r4 |/(| R3| + d 3) | is more than or equal to 1.4.
In one embodiment, a center thickness d1 of the first lens on the optical axis and a distance TTL from a center of the object-side surface of the first lens to the imaging surface of the optical lens on the optical axis may satisfy: d1/TTL is less than or equal to 0.08.
In one embodiment, the maximum clear aperture D of the object-side surface of the first lens corresponding to the maximum field angle of the optical lens, the image height H corresponding to the maximum field angle of the optical lens, and the total effective focal length F of the optical lens in visible light may satisfy: D/(H multiplied by F) is more than or equal to 0.26 and less than or equal to 0.38.
In one embodiment, the maximum field angle FOV of the optical lens, the maximum clear aperture D of the object-side surface of the first lens corresponding to the maximum field angle of the optical lens, and the image height H corresponding to the maximum field angle of the optical lens may satisfy: the | D/H/Tan (FOV) | is less than or equal to 0.8.
In one embodiment, the effective focal length F6 of the sixth lens and the total effective focal length F of the optical lens under visible light may satisfy: the ratio of F6/F is less than or equal to 6.5.
In one embodiment, a distance BFL on the optical axis from the center of the image side surface of the sixth lens element to the imaging surface of the optical lens under near infrared light and a distance TTL on the optical axis from the center of the object side surface of the first lens element to the imaging surface of the optical lens may satisfy: BFL/TTL is more than or equal to 0.1.
In one embodiment, the maximum field angle FOV of the optical lens, the total effective focal length F of the optical lens in the near infrared light, and the image height H corresponding to the maximum field angle of the optical lens may satisfy: (FOV × F)/H ≧ 40.
In one embodiment, a distance TTL between a center of the object-side surface of the first lens element and an image plane of the optical lens on the optical axis and a total effective focal length F of the optical lens under near infrared light satisfy: TTL/F is less than or equal to 5.8.
In one embodiment, the total effective focal length F of the optical lens in the near infrared light and the maximum clear aperture D of the object-side surface of the first lens corresponding to the maximum field angle of the optical lens may satisfy: F/D is more than or equal to 0 and less than or equal to 0.7.
In one embodiment, the maximum clear aperture D of the object-side surface of the first lens corresponding to the maximum field angle of the optical lens, the image height H corresponding to the maximum field angle of the optical lens, and the total effective focal length F of the optical lens in the near-infrared light may satisfy: D/(H × F) is not less than 0.26 and not more than 0.38.
In one embodiment, the total effective focal length F of the optical lens in visible light and the total effective focal length F of the optical lens in near infrared light satisfy: F/F is more than or equal to 0.5 and less than or equal to 1.5.
In one embodiment, a distance BFL on the optical axis from the center of the image-side surface of the sixth lens element under visible light to the imaging surface of the optical lens and a distance BFL on the optical axis from the center of the image-side surface of the sixth lens element under near-infrared light to the imaging surface of the optical lens may satisfy: BFL-BFL is less than or equal to 0.02.
Another aspect of the present application provides an optical lens. The optical lens sequentially comprises from an object side to an image side along an optical axis: a first lens having a negative optical power; a second lens having a negative optical power; a third lens having a positive optical power; a fourth lens having an optical power; a fifth lens having a focal power; and a sixth lens having positive optical power. The distance TTL from the center of the object side surface of the first lens to the imaging surface of the optical lens on the optical axis and the total effective focal length F of the optical lens under visible light can meet the following requirements: TTL/F is less than or equal to 5.8.
In one embodiment, the first lens element has a convex object-side surface and a concave image-side surface.
In one embodiment, the second lens element has a concave object-side surface and a concave image-side surface.
In one embodiment, the second lens element has a concave object-side surface and a convex image-side surface.
In one embodiment, the object-side surface of the third lens element is convex and the image-side surface of the third lens element is convex.
In one embodiment, the fourth lens has positive optical power, and the object-side surface of the fourth lens is a convex surface and the image-side surface of the fourth lens is a convex surface.
In one embodiment, the fourth lens has a negative power and has a concave object-side surface and a concave image-side surface.
In one embodiment, the fifth lens element has a negative power and has a concave object-side surface and a concave image-side surface.
In one embodiment, the fifth lens element has positive optical power, and the object side surface of the fifth lens element is convex and the image side surface of the fifth lens element is convex.
In one embodiment, the object-side surface of the sixth lens element is convex, and the image-side surface of the sixth lens element is convex.
In one embodiment, the sixth lens element has a convex object-side surface and a concave image-side surface.
In one embodiment, the fourth lens and the fifth lens are cemented to form a cemented lens.
In one embodiment, at least one of the second lens, the fourth lens, the fifth lens, and the sixth lens has an aspherical mirror surface.
In one embodiment, the optical lens further includes a stop disposed between the third lens and the fourth lens.
In one embodiment, a distance TTL from a center of an object-side surface of the first lens to an imaging surface of the optical lens on the optical axis, an image height H corresponding to a maximum field angle FOV of the optical lens, and a maximum field angle of the optical lens may satisfy: TTL/H/FOV is less than or equal to 0.04.
In one embodiment, the radius of curvature R1 of the object-side surface of the first lens and the radius of curvature R2 of the image-side surface of the first lens may satisfy: the ratio of R1/R2 is less than or equal to 10.
In one embodiment, the maximum field angle FOV of the optical lens, the maximum clear aperture D of the object-side surface of the first lens corresponding to the maximum field angle of the optical lens, and the image height H corresponding to the maximum field angle of the optical lens may satisfy: D/H/FOV is less than or equal to 0.02.
In one embodiment, a distance BFL on the optical axis from the center of the image-side surface of the sixth lens element to the imaging surface of the optical lens under visible light and a distance TTL on the optical axis from the center of the object-side surface of the first lens element to the imaging surface of the optical lens may satisfy: BFL/TTL is more than or equal to 0.1.
In one embodiment, the effective focal length F4 of the fourth lens and the effective focal length F5 of the fifth lens may satisfy: the absolute value of F4/F5 is more than or equal to 0.75 and less than or equal to 2.
In one embodiment, the maximum field angle FOV of the optical lens, the total effective focal length F of the optical lens in visible light, and the image height H corresponding to the maximum field angle of the optical lens may satisfy: (FOV F)/H.gtoreq.40.
In one embodiment, a radius of curvature R8 of the object-side surface of the fourth lens and a radius of curvature R9 of the image-side surface of the fourth lens may satisfy: and the | R8/R9| is more than or equal to 1.5.
In one embodiment, a distance d34 on the optical axis from the center of the image-side surface of the third lens to the center of the object-side surface of the fourth lens and a distance TTL on the optical axis from the center of the object-side surface of the first lens to the imaging surface of the optical lens may satisfy: d34/TTL is less than or equal to 0.1.
In one embodiment, the total effective focal length F of the optical lens under visible light and the radius of curvature R1 of the object side surface of the first lens can satisfy: and the | F/R1| is more than or equal to 0.2.
In one embodiment, the total effective focal length F of the optical lens in visible light, the radius of curvature R3 of the object-side surface of the second lens, and the radius of curvature R4 of the image-side surface of the second lens may satisfy: the | F/R3| + | F/R4| is less than or equal to 2.5.
In one embodiment, a distance d34 on the optical axis from the center of the image-side surface of the third lens to the center of the object-side surface of the fourth lens and a distance BFL on the optical axis from the center of the image-side surface of the sixth lens to the imaging surface of the optical lens under visible light may satisfy: (d 34 xBFL)/(d 34+ BFL) is less than or equal to 0.8.
In one embodiment, the maximum clear aperture D of the object-side surface of the first lens, where the total effective focal length F of the optical lens in visible light corresponds to the maximum field angle of the optical lens, may satisfy: F/D is more than or equal to 0 and less than or equal to 0.7.
In one embodiment, the radius of curvature R5 of the object-side surface of the third lens and the radius of curvature R6 of the image-side surface of the third lens may satisfy: the ratio of (R5-R6)/(R5 + R6) is more than or equal to-15 and less than or equal to-0.5.
In one embodiment, a radius of curvature R1 of an object-side surface of the first lens, a radius of curvature R2 of an image-side surface of the first lens, and a center thickness d1 of the first lens on the optical axis may satisfy: R1/(R2 + d 1) is less than or equal to 4.
In one embodiment, the effective focal length F2 of the second lens and the total effective focal length F of the optical lens under visible light may satisfy: F2/F is less than or equal to-4.8 and less than or equal to 0.
In one embodiment, the radius of curvature R3 of the object-side surface of the second lens, the radius of curvature R4 of the image-side surface of the second lens, and the center thickness d3 of the second lens on the optical axis may satisfy: i R4I/(IR 3 + d 3) is equal to or more than 1.4.
In one embodiment, the central thickness d1 of the first lens on the optical axis and the distance TTL between the center of the object-side surface of the first lens and the optical axis of the imaging surface of the optical lens can satisfy: d1/TTL is less than or equal to 0.08.
In one embodiment, the maximum clear aperture D of the object-side surface of the first lens corresponding to the maximum field angle of the optical lens, the image height H corresponding to the maximum field angle of the optical lens, and the total effective focal length F of the optical lens in visible light may satisfy: D/(H multiplied by F) is more than or equal to 0.26 and less than or equal to 0.38.
In one embodiment, the maximum field angle FOV of the optical lens, the maximum clear aperture D of the object-side surface of the first lens corresponding to the maximum field angle of the optical lens, and the image height H corresponding to the maximum field angle of the optical lens may satisfy: the | D/H/Tan (FOV) | is less than or equal to 0.8.
In one embodiment, the effective focal length F6 of the sixth lens and the total effective focal length F of the optical lens under visible light may satisfy: the ratio of F6/F is less than or equal to 6.5.
In one embodiment, a distance BFL on the optical axis from the center of the image side surface of the sixth lens element to the imaging surface of the optical lens under the near infrared light and a distance TTL on the optical axis from the center of the object side surface of the first lens element to the imaging surface of the optical lens may satisfy: BFL/TTL is more than or equal to 0.1.
In one embodiment, the maximum field angle FOV of the optical lens, the total effective focal length F of the optical lens in the near infrared light, and the image height H corresponding to the maximum field angle of the optical lens may satisfy: (FOV × F)/H.gtoreq.40.
In one embodiment, a distance TTL between a center of the object-side surface of the first lens element and an image plane of the optical lens on the optical axis and a total effective focal length F of the optical lens under near infrared light satisfy: TTL/F is less than or equal to 5.8.
In one embodiment, the total effective focal length F of the optical lens in the near infrared light and the maximum light-passing aperture D of the object-side surface of the first lens corresponding to the maximum field angle of the optical lens satisfy: F/D is more than or equal to 0 and less than or equal to 0.7.
In one embodiment, the maximum clear aperture D of the object-side surface of the first lens corresponding to the maximum field angle of the optical lens, the image height H corresponding to the maximum field angle of the optical lens, and the total effective focal length F of the optical lens in the near-infrared light may satisfy: D/(H × F) is not less than 0.26 and not more than 0.38.
In one embodiment, the total effective focal length F of the optical lens in visible light and the total effective focal length F of the optical lens in near infrared light satisfy: F/F is more than or equal to 0.5 and less than or equal to 1.5.
In one embodiment, a distance BFL on the optical axis from the center of the image-side surface of the sixth lens element under visible light to the imaging surface of the optical lens and a distance BFL on the optical axis from the center of the image-side surface of the sixth lens element under near-infrared light to the imaging surface of the optical lens may satisfy: BFL-BFL ≦ 0.02.
Another aspect of the present application provides an electronic device. The electronic device comprises the optical lens provided by the application and an imaging element for converting an optical image formed by the optical lens into an electric signal.
This application has adopted six lens, through optimizing shape, the focal power etc. that sets up each lens, makes optical lens have high resolution, miniaturization, less front end bore, be applicable to under visible light and the infrared light, temperature performance is good, big visual field, at least one beneficial effect such as low cost and high imaging quality.
Drawings
Other features, objects, and advantages of the present application will become more apparent from the following detailed description of the embodiments when taken in conjunction with the accompanying drawings. In the drawings:
fig. 1 is a schematic view showing a structure of an optical lens according to embodiment 1 of the present application;
fig. 2 is a schematic structural view showing an optical lens according to embodiment 2 of the present application;
fig. 3 is a schematic structural view showing an optical lens according to embodiment 3 of the present application;
fig. 4 is a schematic structural view showing an optical lens according to embodiment 4 of the present application;
fig. 5 is a schematic structural view showing an optical lens according to embodiment 5 of the present application;
fig. 6 is a schematic structural view showing an optical lens according to embodiment 6 of the present application;
fig. 7 is a schematic view showing a structure of an optical lens according to embodiment 7 of the present application; and
fig. 8 is a schematic view showing a structure of an optical lens according to embodiment 8 of the present application.
Detailed Description
To facilitate an understanding of the present application, the present application will now be described more fully with reference to the accompanying drawings. It should be understood that the detailed description is merely illustrative of exemplary embodiments of the present application and does not limit the scope of the present application in any way. Like reference numerals refer to like elements throughout the specification. The expression "and/or" includes any and all combinations of one or more of the associated listed items.
It should be noted that in this specification, the expressions first, second, third, etc. are used only to distinguish one feature from another, and do not represent any limitation on the features. Thus, the first lens discussed below may also be referred to as the second lens or the third lens without departing from the teachings of the present application.
In the drawings, the thickness, size, and shape of the lens have been slightly exaggerated for convenience of explanation. In particular, the shapes of the spherical or aspherical surfaces shown in the drawings are shown by way of example. That is, the shape of the spherical surface or the aspherical surface is not limited to the shape of the spherical surface or the aspherical surface shown in the drawings. The figures are purely diagrammatic and not drawn to scale.
Herein, the paraxial region refers to a region near the optical axis. If the lens surface is convex and the convex position is not defined, it means that the lens surface is convex at least in the paraxial region; if the lens surface is concave and the concave position is not defined, it means that the lens surface is concave at least in the paraxial region. The surface of each lens closest to the object is called the object side surface of the lens, and the surface of each lens closest to the image side is called the image side surface of the lens.
It will be further understood that the terms "comprises," "comprising," "has," "having," "includes" and/or "including," when used in this specification, specify the presence of stated features, elements, and/or components, but do not preclude the presence or addition of one or more other features, elements, components, and/or groups thereof. Moreover, when a statement such as "at least one of" appears after a list of listed features, the entirety of the listed features is modified rather than modifying individual elements in the list. Furthermore, when describing embodiments of the present application, the use of "may" mean "one or more embodiments of the present application. Also, the term "exemplary" is intended to refer to an example or illustration.
Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
The features, principles and other aspects of the present application are described in detail below.
In an exemplary embodiment, the optical lens includes, for example, six lenses having optical powers, i.e., a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens. The six lenses are arranged along the optical axis in sequence from the object side to the image side.
In an exemplary embodiment, the optical lens may further include a photosensitive element disposed on the image plane. Alternatively, the photosensitive element provided to the imaging plane may be a photosensitive coupling element (CCD) or a complementary metal oxide semiconductor element (CMOS).
In an exemplary embodiment, the first lens may have a negative power. The first lens may have a convex-concave type. The arrangement of the focal power and the surface type of the first lens is beneficial to reducing the incident angle of incident light on a strike surface (the object side surface of the first lens), so that the light can correctly and stably enter a rear optical system, and the improvement of image resolution is facilitated; the lens is also favorable for diverging light rays, enabling the light rays to stably transit, and simultaneously being favorable for enabling large-angle light rays to be emitted into the first lens as much as possible, so that the illumination of the lens is improved, and the lens has higher imaging quality.
In an exemplary embodiment, the second lens may have a negative power. The second lens may have a concave-concave type or a convex-concave type. The arrangement of the focal power and the surface type of the second lens is beneficial to enabling light rays to enter a rear optical system stably, increasing luminous flux, adjusting the light rays, reducing chromatic aberration and reducing the total length of the lens; the lens is also favorable for diverging light rays, enabling the light rays to have stable transition, and simultaneously being favorable for enabling large-angle light rays to be emitted into the second lens as much as possible, so that the illumination of the lens is improved. Preferably, the second lens may have an aspherical mirror surface to further improve the resolution quality.
In an exemplary embodiment, the third lens may have a positive optical power. The third lens may have a convex type. The arrangement of the focal power and the surface type of the third lens is beneficial to converging light rays and compressing the angle of incident light rays, so that the light rays are in smooth transition, and the aperture of a lens at the rear end of the lens is reduced. Preferably, the third lens has a higher refractive index and a lower abbe number, which is beneficial to compensating the on-axis aberration of the lens and improving the imaging quality.
In exemplary embodiments, the fourth lens may have a positive power or a negative power. The fourth lens may have a convex type or a concave type.
In an exemplary embodiment, the fifth lens may have a positive power or a negative power. The fifth lens may have a convex type or a concave type.
In an exemplary embodiment, the sixth lens may have a positive optical power. The sixth lens may have a convex type or a convex concave type. The optical power and the surface type arrangement of the sixth lens can enlarge the light rays entering the sixth lens to an imaging surface, and the total length of the lens can be reduced. Preferably, the sixth lens can have an aspheric surface, which is beneficial to correcting astigmatism and curvature of field and improving the resolution of the lens.
In an exemplary embodiment, an optical lens according to the present application may satisfy: TTL/H/FOV is less than or equal to 0.04, wherein TTL is the distance between the center of the object side surface of the first lens and the imaging surface of the optical lens on the optical axis, FOV is the maximum angle of view of the optical lens, and H is the image height corresponding to the maximum angle of view of the optical lens. More specifically, TTL, H, and FOV further satisfy: TTL/H/FOV is less than or equal to 0.03. The TTL/H/FOV is less than or equal to 0.04, and the miniaturization of the lens is realized by effectively limiting the length of the lens under the condition of not changing the imaging surface and the image height of the lens.
In an exemplary embodiment, an optical lens according to the present application may satisfy: and | R1/R2| ≦ 10, wherein R1 is the radius of curvature of the object-side surface of the first lens, and R2 is the radius of curvature of the image-side surface of the first lens. More specifically, R1 and R2 may further satisfy: the ratio of R1/R2 is less than or equal to 7.5. Satisfy | R1/R2| ≦ 10, be favorable to first lens to collect the light of bigger angle in order to get into rear optical system, and be favorable to reducing the camera lens front end bore, reduce the volume, realize the miniaturization when being favorable to promoting the resolution.
In an exemplary embodiment, an optical lens according to the present application may satisfy: D/H/FOV is less than or equal to 0.02, wherein FOV is the maximum field angle of the optical lens, D is the maximum clear aperture of the object side surface of the first lens corresponding to the maximum field angle of the optical lens, and H is the image height corresponding to the maximum field angle of the optical lens. More specifically, D, H and the FOV further may satisfy: D/H/FOV is less than or equal to 0.015. The D/H/FOV is less than or equal to 0.02, the front end caliber is favorably reduced, and the miniaturization is favorably realized.
In an exemplary embodiment, an optical lens according to the present application may satisfy: and the BFL/TTL is more than or equal to 0.1, wherein the BFL is the distance from the center of the image side surface of the sixth lens to the imaging surface of the optical lens under visible light, and the TTL is the distance from the center of the object side surface of the first lens to the imaging surface of the optical lens. For example, the BFL may be a distance on the optical axis from the center of the image-side surface of the sixth lens to the imaging surface of the optical lens when the optical lens images in a visible light environment in a range of wavelengths from 436nm to 656 nm. More specifically, BFL and TTL further can satisfy: BFL/TTL is more than or equal to 0.15. The BFL/TTL is more than or equal to 0.1, so that the back focus BFL of the lens is longer on the basis of realizing miniaturization, and the assembly of the lens is facilitated.
In an exemplary embodiment, an optical lens according to the present application may satisfy: and | F4/F5| ≦ 2 of 0.75 ≦ wherein F4 is the effective focal length of the fourth lens and F5 is the effective focal length of the fifth lens. More specifically, F4 and F5 may further satisfy: the absolute value of F4/F5 is more than or equal to 0.8 and less than or equal to 1.5. Satisfy 0.75 ≦ F4/F5| ≦ 2, help the light to pass through gently, be favorable to correcting the colour difference, promote like quality, and be favorable to effectively improving the camera lens thermal compensation.
In an exemplary embodiment, an optical lens according to the present application may satisfy: (FOV multiplied by F)/H is more than or equal to 40, wherein FOV is the maximum angle of view of the optical lens, F is the total effective focal length of the optical lens under visible light, and H is the image height corresponding to the maximum angle of view of the optical lens. For example, F may be the total effective focal length of the optical lens when imaged in a visible light environment having a wavelength in the range of 436nm to 656 nm. More specifically, FOV, F and H further satisfy: (FOV F)/H.gtoreq.45. The optical lens satisfies (FOV multiplied by F)/H is more than or equal to 40, and is beneficial to simultaneously satisfying the characteristics of large field angle, long focus and the like.
In an exemplary embodiment, an optical lens according to the present application may satisfy: and | R8/R9| ≧ 1.5, where R8 is the radius of curvature of the object-side surface of the fourth lens, and R9 is the radius of curvature of the image-side surface of the fourth lens. More specifically, R8 and R9 may further satisfy: and the R8/R9 is more than or equal to 1.6. Satisfy | R8/R9| > 1.5, be favorable to the fourth lens to compress the light of collecting for the light trend is gentle relatively, thereby is favorable to making light smooth transition to the rear, in addition, can also reduce the camera lens aberration effectively, promotes the image quality of camera lens. If | R8/R9| < 1.5, the incident angle of the light incident on the object-side surface of the fifth lens element increases, and the relative illumination of the lens is likely to decrease. Therefore, satisfying | R8/R9| ≧ 1.5 is advantageous for the optical lens to obtain a bright image with high image quality.
In an exemplary embodiment, an optical lens according to the present application may satisfy: and d34/TTL is less than or equal to 0.1, wherein d34 is the distance between the center of the image side surface of the third lens and the center of the object side surface of the fourth lens on the optical axis, and TTL is the distance between the center of the object side surface of the first lens and the imaging surface of the optical lens on the optical axis. More specifically, d34 and TTL further satisfy: d34/TTL is less than or equal to 0.08. The d34/TTL is less than or equal to 0.1, so that the light can be smoothly transited, and the image quality can be improved.
In an exemplary embodiment, an optical lens according to the present application may satisfy: and | F/R1| ≧ 0.2, wherein F is the total effective focal length of the optical lens under visible light, and R1 is the curvature radius of the object side surface of the first lens. More specifically, F and R1 may further satisfy: and the | F/R1| is more than or equal to 0.3. The requirement that F/R1 is more than or equal to 0.2 is met, the change of the refraction angle of incident light passing through the first lens is gentle, excessive aberration caused by too strong refraction change is avoided, the manufacturing of the first lens is facilitated, and meanwhile, the reduction of tolerance sensitivity of a lens is facilitated.
In an exemplary embodiment, an optical lens according to the present application may satisfy: TTL/F is less than or equal to 5.8, wherein TTL is the distance between the center of the object side surface of the first lens and the imaging surface of the optical lens on the optical axis, and F is the total effective focal length of the optical lens under visible light. More specifically, TTL and F further satisfy: TTL/F is less than or equal to 5.5. The TTL/F is less than or equal to 5.8, the length of the lens can be effectively limited, and the miniaturization of the lens is realized.
In an exemplary embodiment, an optical lens according to the present application may satisfy: and | F/R3| + | F/R4| < 2.5, wherein F is the total effective focal length of the optical lens under visible light, R3 is the curvature radius of the object side surface of the second lens, and R4 is the curvature radius of the image side surface of the second lens. More specifically, F, R and R4 further may satisfy: the | F/R3| + | F/R4| is less than or equal to 2. The positive lens meets the condition that the absolute value of F/R3 is less than or equal to 2.5, more light rays can enter the second lens, and the astigmatism of the lens can be effectively corrected so as to improve the imaging quality of the lens.
In an exemplary embodiment, an optical lens according to the present application may satisfy: (d 34 xBFL)/(d 34+ BFL) is less than or equal to 0.8, wherein d34 is the distance on the optical axis from the center of the image side surface of the third lens to the center of the object side surface of the fourth lens, and BFL is the distance on the optical axis from the center of the image side surface of the sixth lens under visible light to the imaging surface of the optical lens. More specifically, d34 and BFL may further satisfy: (d 34 multiplied by BFL)/(d 34+ BFL) is less than or equal to 0.75. Satisfy (d 34 xBFL)/(d 34+ BFL) and be less than or equal to 0.8, be favorable to improving the equipment yield of camera lens, it is longer to help making burnt BFL behind the camera lens simultaneously to do benefit to and place other optical element, increase the design elasticity of camera lens.
In an exemplary embodiment, an optical lens according to the present application may satisfy: F/D is more than or equal to 0 and less than or equal to 0.7, wherein F is the total effective focal length of the optical lens under visible light, and D is the maximum clear aperture of the object side surface of the first lens corresponding to the maximum field angle of the optical lens. More specifically, F and D further satisfy: F/D is more than or equal to 0.1 and less than or equal to 0.6. F/D is more than or equal to 0 and less than or equal to 0.7, so that the light input quantity is increased, and the relative illumination is improved.
In an exemplary embodiment, an optical lens according to the present application may satisfy: -15 ≦ (R5-R6)/(R5 + R6) ≦ -0.5, where R5 is the radius of curvature of the object-side surface of the third lens and R6 is the radius of curvature of the image-side surface of the third lens. More specifically, R5 and R6 may further satisfy: the ratio of (R5-R6)/(R5 + R6) is more than or equal to-13 and less than or equal to-1. The requirement that (R5-R6)/(R5 + R6) is more than or equal to-15 and less than or equal to-0.5 is met, the aberration of the optical lens is favorably corrected, the light rays entering the third lens and the emergent light rays are favorably ensured to be gentle, and the tolerance sensitivity of the optical lens is favorably reduced.
In an exemplary embodiment, an optical lens according to the present application may satisfy: R1/(R2 + d 1) ≦ 4, wherein R1 is a curvature radius of an object side surface of the first lens, R2 is a curvature radius of an image side surface of the first lens, and d1 is a center thickness of the first lens on an optical axis. More specifically, R1, R2 and d1 further may satisfy: R1/(R2 + d 1) is less than or equal to 3.5. Satisfy R1/(R2 + d 1) and be less than or equal to 4, be favorable to making optical lens's peripheral light and central light have the optical path difference, be favorable to diverging central light, get into rear optical system to be favorable to reducing the camera lens front end bore, reduce the camera lens volume, be favorable to realizing miniaturization and reduce cost.
In an exemplary embodiment, an optical lens according to the present application may satisfy: 4.8 ≦ F2/F ≦ 0, where F2 is the effective focal length of the second lens and F is the total effective focal length of the optical lens in visible light. More specifically, F2 and F further satisfy: F2/F is less than or equal to-4.5 and less than or equal to 0. F2/F is more than or equal to-4.8 and less than or equal to 0, light is favorably diffused, the sensitivity of the rear optical lens is reduced, and meanwhile, the thermal compensation of the lens can be effectively adjusted by reasonably setting the effective focal length of the second lens.
In an exemplary embodiment, an optical lens according to the present application may satisfy: l R4 l/(| R3| + d 3) ≧ 1.4, where R3 is the radius of curvature of the object-side surface of the second lens, R4 is the radius of curvature of the image-side surface of the second lens, and d3 is the center thickness of the second lens on the optical axis. More specifically, R4, R3 and d3 further may satisfy: r4 |/(| R3| + d 3) | is more than or equal to 1.5. The requirement that R4/R3 + d3 is more than or equal to 1.4 is met, the optical path difference between peripheral light rays and central light rays of the lens is favorably realized, edge light rays are favorably dispersed and enter a rear optical lens, and the sensitivity of the lens is favorably reduced.
In an exemplary embodiment, an optical lens according to the present application may satisfy: and d1/TTL is less than or equal to 0.08, wherein d1 is the central thickness of the first lens on the optical axis, and TTL is the distance from the center of the object side surface of the first lens to the imaging surface of the optical lens on the optical axis. More specifically, d1 and TTL further can satisfy: d1/TTL is less than or equal to 0.06. The d1/TTL is less than or equal to 0.08, so that the center thickness of the first lens is reduced, the size of the lens is reduced, and the miniaturization and cost reduction of the lens are facilitated.
In an exemplary embodiment, an optical lens according to the present application may satisfy: D/(H multiplied by F) is more than or equal to 0.26 and less than or equal to 0.38, wherein D is the maximum clear aperture of the object side surface of the first lens corresponding to the maximum field angle of the optical lens, H is the image height corresponding to the maximum field angle of the optical lens, and F is the total effective focal length of the optical lens under visible light. More specifically, D, H and F further may satisfy: D/(H multiplied by F) is more than or equal to 0.28 and less than or equal to 0.35. Satisfies the requirement that D/(HxF) is more than or equal to 0.26 and less than or equal to 0.38, is beneficial to reducing the aperture of the front end of the lens, and is beneficial to realizing the characteristics of miniaturization, long focus and the like.
In an exemplary embodiment, an optical lens according to the present application may satisfy: i D/H/Tan (FOV) I is less than or equal to 0.8, wherein the FOV is the maximum field angle of the optical lens, D is the maximum light-passing aperture of the object side surface of the first lens corresponding to the maximum field angle of the optical lens, and H is the image height corresponding to the maximum field angle of the optical lens. More specifically, D, H and the FOV further may satisfy: the | D/H/Tan (FOV) | is less than or equal to 0.5. The requirements of | D/H/Tan (FOV) | is less than or equal to 0.8, the aperture of the front end of the lens is favorably reduced, and the characteristics of miniaturization, large field angle and the like are favorably realized.
In an exemplary embodiment, an optical lens according to the present application may satisfy: and | F6/F | is less than or equal to 6.5, wherein F6 is the effective focal length of the sixth lens, and F is the total effective focal length of the optical lens under visible light. More specifically, F6 and F further satisfy: the ratio of F6/F is less than or equal to 6.0. The absolute value of F6/F is less than or equal to 6.5, the sixth lens is favorable for collecting light, and the light flux is ensured.
In an exemplary embodiment, an optical lens according to the present application may satisfy: BFL/TTL is more than or equal to 0.1, wherein BFL is the distance from the center of the image side surface of the sixth lens element of the optical lens under near infrared light to the optical axis of the imaging surface of the optical lens, and TTL is the distance from the center of the object side surface of the first lens element to the optical axis of the imaging surface of the optical lens. For example, BFL may be a distance on the optical axis from the center of the image side surface of the sixth lens to the imaging surface of the optical lens when the optical lens images in a near-infrared light environment having a wavelength in a range of 900nm to 1000 nm. More specifically, BFL and TTL may further satisfy: BFL/TTL is more than or equal to 0.15. The BFL/TTL is more than or equal to 0.1, so that the back focal BFL of the lens is longer on the basis of realizing miniaturization, and the assembly of the lens is facilitated.
In an exemplary embodiment, an optical lens according to the present application may satisfy: (FOV multiplied by F)/H is more than or equal to 40, wherein FOV is the maximum angle of view of the optical lens, F is the total effective focal length of the optical lens under near infrared light, and H is the image height corresponding to the maximum angle of view of the optical lens. For example, F may be the total effective focal length of the optical lens when imaging in a near infrared light environment in the wavelength range of 900nm to 1000 nm. More specifically, FOV, F, and H may further satisfy: (FOV × F)/H.gtoreq.45. The optical lens satisfies (FOV multiplied by F)/H is more than or equal to 40, and is beneficial to simultaneously satisfying the characteristics of large field angle, long focus and the like.
In an exemplary embodiment, an optical lens according to the present application may satisfy: TTL/F is less than or equal to 5.8, wherein TTL is the distance between the center of the object side surface of the first lens and the imaging surface of the optical lens on the optical axis, and F is the total effective focal length of the optical lens under near infrared light. More specifically, TTL and F may further satisfy: TTL/F is less than or equal to 5.5. The lens meets TTL/F ≦ 5.8, the length of the lens can be effectively limited, and the miniaturization of the lens is realized.
In an exemplary embodiment, an optical lens according to the present application may satisfy: f is more than or equal to 0 and less than or equal to 0.7, wherein F is the total effective focal length of the optical lens under near infrared light, and D is the maximum light-passing aperture of the object side surface of the first lens corresponding to the maximum field angle of the optical lens. More specifically, F and D may further satisfy: F/D is more than or equal to 0.1 and less than or equal to 0.6. F/D is more than or equal to 0 and less than or equal to 0.7, so that the light input quantity is increased, and the relative illumination is improved.
In an exemplary embodiment, an optical lens according to the present application may satisfy: D/(H multiplied by F) is less than or equal to 0.26 and less than or equal to 0.38, wherein D is the maximum clear aperture of the object side surface of the first lens corresponding to the maximum field angle of the optical lens, H is the image height corresponding to the maximum field angle of the optical lens, and F is the total effective focal length of the optical lens under near infrared light. More specifically, D, H and F may further satisfy: D/(H × F) is not less than 0.28 and not more than 0.35. D/(H multiplied by F) is more than or equal to 0.26 and less than or equal to 0.38, which is beneficial to reducing the aperture of the front end of the lens and realizing the characteristics of miniaturization, long focus and the like.
In an exemplary embodiment, an optical lens according to the present application may satisfy: F/F is less than or equal to 0.5 and less than or equal to 1.5, wherein F is the total effective focal length of the optical lens under visible light, and F is the total effective focal length of the optical lens under near infrared light. More specifically, F and F may further satisfy: F/F is more than or equal to 0.8 and less than or equal to 1.2. F/F is more than or equal to 0.5 and less than or equal to 1.5, so that when the lens is used in visible light and near infrared light environments, the total effective focal length of the lens is close, and infrared visible confocal can be realized.
In an exemplary embodiment, an optical lens according to the present application may satisfy: BFL-BFL is less than or equal to 0.02, wherein BFL is the distance between the center of the image side surface of the sixth lens under visible light of the optical lens and the optical axis of the imaging surface of the optical lens, and BFL is the distance between the center of the image side surface of the sixth lens under near infrared light of the optical lens and the optical axis of the imaging surface of the optical lens. More specifically, BFL and BFL may further satisfy: BFL-BFL is less than or equal to 0.01. The requirement that BFL-BFL is less than or equal to 0.02 is met, the position difference of the optimal imaging surface (chip surface) of the lens is smaller than 20um when the lens is used in the visible light and near infrared light environments, and infrared visible confocal is further facilitated to be realized.
In an exemplary embodiment, a stop for limiting the light beam may be disposed between the third lens and the fourth lens to further improve the imaging quality of the optical lens. The diaphragm is arranged between the third lens and the fourth lens, so that the size of a lens behind the diaphragm can be reduced, the total length of the lens can be further shortened, the effective beam-collecting of light rays entering the optical lens is facilitated, the aperture of the front-end lens is reduced, and the assembly sensitivity of the lens is reduced. In the embodiment of the present application, the stop may be disposed in the vicinity of the image side surface of the third lens or in the vicinity of the object side surface of the fourth lens. It should be noted, however, that the positions of the diaphragms disclosed herein are merely examples and not limitations; in alternative embodiments, the diaphragm may be disposed at other positions according to actual needs.
In an exemplary embodiment, a filter and/or a protective glass may be disposed between the sixth lens and the imaging surface to filter light rays having different wavelengths and prevent damage to image side elements (e.g., a chip) of the optical lens.
As known to those skilled in the art, cemented lenses may be used to minimize or eliminate chromatic aberration. The cemented lens used in the optical lens can improve the image quality and reduce the reflection loss of light energy, thereby realizing high resolution and improving the imaging definition of the lens. In addition, the use of the cemented lens can also simplify the assembly procedure in the lens manufacturing process.
In an exemplary embodiment, the fourth lens and the fifth lens may be cemented to form a cemented lens. The fourth lens with positive focal power and convex object-side and image-side surfaces is cemented with the fifth lens with negative focal power and concave object-side and image-side surfaces; or the fourth lens with negative focal power and concave object-side and image-side surfaces is cemented with the fifth lens with positive focal power and convex object-side and image-side surfaces; the light rays passing through the fourth lens can be smoothly transited to the imaging surface of the optical lens, the structure of the optical lens is compact, the size of the optical lens is reduced, various aberrations of the optical lens are corrected, the matching sensitivity of each lens is reduced, the resolution is improved, and the optical performances such as distortion, CRA and the like are optimized. Of course, the fourth lens and the fifth lens may not be cemented, which is advantageous for improving the resolution.
The gluing mode adopted between the lenses has at least one of the following advantages: self-color difference is reduced, tolerance sensitivity is reduced, and the integral color difference of the system is balanced through residual partial color difference; reducing the separation distance between the two lenses, thereby reducing the overall length of the system; the assembling parts between the lenses are reduced, so that the working procedures are reduced, and the cost is reduced; the tolerance sensitivity problems of inclination/core deviation and the like generated in the assembling process of the lens unit are reduced, and the production yield is improved; the light quantity loss caused by reflection among the lenses is reduced, and the illumination is improved; the field curvature can be further reduced and the off-axis point aberration of the system can be corrected. The gluing design shares the whole chromatic aberration correction of the system, effectively corrects the aberration so as to improve the resolving power, and enables the optical system to be compact as a whole and meet the miniaturization requirement.
In an exemplary embodiment, the third lens may be a spherical lens; the first lens, the second lens, the fourth lens, the fifth lens, and the sixth lens may be aspheric lenses. In another exemplary embodiment, the first lens and the third lens may be spherical lenses; the second lens, the fourth lens, the fifth lens, and the sixth lens may be aspheric lenses. The specific number of the spherical lenses and the aspherical lenses is not particularly limited, and the number of the aspherical lenses can be increased when the imaging quality is mainly embodied. In particular, in order to improve the resolution quality of the optical system, the first lens, the second lens, the third lens, the fourth lens, the fifth lens, and the sixth lens may all be aspheric lenses. The aspheric lens is characterized in that: the curvature varies continuously from the center to the periphery of the lens. Unlike a spherical lens having a constant curvature from the center to the periphery of the lens, an aspherical lens has better curvature radius characteristics, and has advantages of improving distortion aberration and improving astigmatic aberration. After the aspheric lens is adopted, the aberration generated in imaging can be eliminated as much as possible, so that the imaging quality of the lens is improved. The aspheric lens helps to correct system aberration and improve resolving power.
According to the optical lens of the above embodiment of the present application, through reasonable setting of the shapes and focal powers of the lenses, under the condition that only 6 lenses are used, the optical lens has at least one beneficial effect of high resolution (up to more than five million pixels), miniaturization, smaller front end aperture, wide application range, good temperature performance, large field of view, low cost, good imaging quality, and the like. The optical lens can realize high resolution, and can meet the requirements of large view field, small volume, low sensitivity, high stability and high production yield and low cost at the same time. The optical lens can be well matched with vehicle-mounted visible light (RGB) and Infrared (IR) chips, and can ensure that clear imaging can be realized under the condition of visible light in the daytime or infrared illumination at night. The optical lens can be directly matched with chips which can simultaneously be suitable for infrared light and visible light, does not need secondary focusing, has simple process and can greatly save the cost. The optical lens is beneficial to eliminating ghost images by reasonably setting the curvature and the distance of each lens and the back focal length of the lens.
According to the optical lens of the embodiment of the application, the cemented lens is arranged to share the whole chromatic aberration correction of the system, so that the system aberration can be corrected, the system resolution quality can be improved, the problem of matching sensitivity can be reduced, the whole structure of the optical system can be compact, and the miniaturization requirement can be met. The cemented lens can also effectively eliminate the influence of ghost images on the lens, so that the lens has higher resolution on the basis of eliminating ghost images.
In an exemplary embodiment, the first lens, the second lens, the third lens, the fourth lens, the fifth lens, and the sixth lens may all be glass lenses. The optical lens made of glass can inhibit the deviation of the back focus of the optical lens along with the temperature change so as to improve the stability of the system. Meanwhile, the glass material is adopted, so that the problem that the normal use of the lens is influenced due to the imaging blur of the lens caused by high and low temperature changes in the use environment can be avoided. Specifically, when the importance is paid to the resolution quality and the reliability, the first lens to the sixth lens may be all glass aspherical lenses. Of course, in the application where the requirement of temperature stability is low, the first lens to the sixth lens in the optical lens can also be made of plastic. The optical lens is made of plastic, so that the manufacturing cost can be effectively reduced. Of course, the first to sixth lenses in the optical lens may also be made of plastic and glass in combination.
However, it will be appreciated by those skilled in the art that the number of lenses constituting the lens barrel can be varied to achieve the various results and advantages described in the present specification without departing from the claimed technical solution. For example, although six lenses are exemplified in the embodiment, the optical lens is not limited to include six lenses. The optical lens may also include other numbers of lenses, if desired. Specific examples of an optical lens applicable to the above-described embodiments are further described below with reference to the drawings.
Example 1
An optical lens according to embodiment 1 of the present application is described below with reference to fig. 1. Fig. 1 shows a schematic structural diagram of an optical lens according to embodiment 1 of the present application.
As shown in fig. 1, the optical lens, in order from an object side to an image side along an optical axis, comprises: 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.
The first lens L1 is a convex-concave lens with negative refractive power, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens element L2 is a biconcave lens element with negative refractive power, and has a concave object-side surface S3 and a concave image-side surface S4. The third lens element L3 is a biconvex lens element with positive refractive power, and has a convex object-side surface S5 and a convex image-side surface S6. The fourth lens element L4 is a biconvex lens element with positive refractive power, and has a convex object-side surface S8 and a convex image-side surface S9. The fifth lens element L5 is a biconcave lens element with negative refractive power, and has a concave object-side surface S9 and a concave image-side surface S10. The sixth lens element L6 is a biconvex lens with positive refractive power, and has a convex object-side surface S11 and a convex image-side surface S12. The fourth lens L4 and the fifth lens L5 may be cemented to constitute a cemented lens.
The optical lens may further include a stop STO, which may be disposed between the third lens L3 and the fourth lens L4 to improve imaging quality. For example, the stop STO may be disposed between the third lens L3 and the fourth lens L4 at a position close to the image side surface S6 of the third lens L3.
Optionally, the optical lens may further include a filter L7 and/or a cover glass L7' having an object side surface S13 and an image side surface S14. The filter L7 and/or the protective glass L7' may be used to correct color deviation and/or protect the image sensing chip IMA located at the imaging plane. The light from the object passes through the respective surfaces S1 to S14 in order and is finally imaged on the imaging plane.
Table 1 shows a radius of curvature R, a thickness/distance d (it is understood that the thickness/distance d of the row in which S1 is located is the center thickness d1 of the first lens L1, the thickness/distance d of the row in which S2 is located is the separation distance d12 between the image-side surface S2 of the first lens L1 and the object-side surface S3 of the second lens L2, and so on), a refractive index Nd, and an abbe number Vd of each lens of the optical lens of example 1.
Figure BDA0003020144240000151
TABLE 1
In embodiment 1, the object-side surface S1 and the image-side surface S2 of the first lens L1, the object-side surface S3 and the image-side surface S4 of the second lens L2, the object-side surface S8 and the image-side surface S9 of the fourth lens L4, the object-side surface S9 and the image-side surface S10 of the fifth lens L5, and the object-side surface S11 and the image-side surface S12 of the sixth lens L6 may all be aspheric, and the surface type x of each aspheric lens may be defined by, but not limited to, the following aspheric formula:
Figure BDA0003020144240000161
wherein x is the rise of the distance from the aspheric surface vertex to the aspheric surface vertex when the aspheric surface is at the position with the height of h along the optical axis direction; c is the paraxial curvature of the aspheric surface, c =1/R (i.e., paraxial curvature c is the inverse of radius of curvature R in table 1 above); k is a conic coefficient; ai is the correction coefficient of the i-th order of the aspheric surface. The conical coefficients k and high-order term coefficients A4, A6, A8, a10, a12, a14, and a16 that can be used for the respective aspherical mirror surfaces S1 to S4, S8 to S12 in example 1 are given in table 2 below.
Flour mark k A4 A6 A8 A10 A12 A14 A16
S1 -1.8092 -3.8500E-04 -1.0890E-03 4.9641E-05 7.5927E-07 -4.1763E-08 -4.24984E-11 -7.19E-12
S2 -0.8692 1.3820E-02 -2.3808E-03 1.0553E-03 -1.9091E-04 -3.3005E-06 -4.28678E-09 1.796E-10
S3 2.5189 2.9089E-02 -4.1207E-03 1.0208E-03 -9.0741E-05 6.4226E-06 2.0235E-06 -1.9710E-07
S4 89.3472 3.0000E-03 -4.3295E-03 4.9846E-04 -1.8134E-05 1.0528E-05 8.6102E-07 -1.6893E-06
S8 -0.3533 -8.8716E-04 2.1163E-04 -6.2331E-04 2.8920E-05 1.5119E-04 2.8337E-05 -5.2729E-05
S9 -0.3216 -7.9500E-02 6.7849E-02 -2.8000E-02 5.9730E-03 -6.7988E-04 -6.1625E-05 9.3878E-05
S10 -56.5208 6.9808E-04 3.4854E-03 -2.1441E-04 -1.1515E-05 2.5630E-06 -4.3520E-06 1.2315E-06
S11 -14.9393 -6.6000E-03 -4.0420E-04 -1.1000E-04 1.0987E-04 -1.8162E-06 -2.2488E-07 -1.2150E-07
S12 0.4944 1.0974E-02 -8.0100E-04 -3.5175E-06 1.0848E-05 1.1266E-06 3.6080E-08 4.0860E-08
TABLE 2
Example 2
An optical lens according to embodiment 2 of the present application is described below with reference to fig. 2. In this embodiment and the following embodiments, descriptions of parts similar to those of embodiment 1 will be omitted for the sake of brevity. Fig. 2 shows a schematic structural diagram of an optical lens according to embodiment 2 of the present application.
As shown in fig. 2, the optical lens assembly includes, in order from an object side to an image side, a first lens element L1, a second lens element L2, a third lens element L3, a fourth lens element L4, a fifth lens element L5 and a sixth lens element L6.
The first lens L1 is a convex-concave lens with negative refractive power, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens element L2 is a biconcave lens element with negative refractive power, and has a concave object-side surface S3 and a concave image-side surface S4. The third lens element L3 is a biconvex lens element with positive refractive power, and has a convex object-side surface S5 and a convex image-side surface S6. The fourth lens element L4 is a biconvex lens element with positive refractive power, and has a convex object-side surface S8 and a convex image-side surface S9. The fifth lens element L5 is a biconcave lens element with negative refractive power, and has a concave object-side surface S9 and a concave image-side surface S10. The sixth lens element L6 is a biconvex lens with positive refractive power, and has a convex object-side surface S11 and a convex image-side surface S12. The fourth lens L4 and the fifth lens L5 may be cemented to constitute a cemented lens.
The optical lens may further include a stop STO, which may be disposed between the third lens L3 and the fourth lens L4 to improve imaging quality. For example, the stop STO may be disposed between the third lens L3 and the fourth lens L4 at a position close to the object side surface S8 of the fourth lens L4.
Optionally, the optical lens may further include a filter L7 and/or a cover glass L7' having an object side surface S13 and an image side surface S14. The filter L7 and/or the protective glass L7' may be used to correct color deviation and/or protect the image sensing chip IMA located at the imaging plane. The light from the object passes through the respective surfaces S1 to S14 in order and is finally imaged on the imaging plane.
Table 3 shows the radius of curvature R, thickness/distance d, refractive index Nd, and abbe number Vd of each lens of the optical lens of example 2. Table 4 shows conic coefficients and high-order term coefficients that can be used for each aspherical mirror surface in example 2, wherein each aspherical mirror surface type can be defined by formula (1) given in example 1 above.
Figure BDA0003020144240000171
TABLE 3
Flour mark k A4 A6 A8 A10 A12 A14 A16
S1 -1.9302 -9.9800E-04 -1.1694E-03 6.3770E-05 1.3515E-07 -4.1750E-08 -4.2498E-11 -7.1090E-12
S2 -0.8876 1.1360E-03 -2.7315E-03 1.3338E-03 -2.5266E-04 -3.3005E-06 -4.2868E-09 1.7920E-10
S3 3.1140 3.2450E-02 -3.7331E-03 1.0219E-03 -9.2376E-05 6.4226E-06 2.0235E-06 -1.9607E-07
S4 16.0000 2.2164E-02 -3.8723E-03 6.3563E-04 -6.1289E-05 1.0528E-05 8.6102E-07 -1.6893E-06
S8 0.5388 1.0209E-03 -2.2468E-03 3.0789E-04 -3.1988E-04 1.5119E-04 2.8337E-05 -5.2729E-05
S9 0.1232 -8.1610E-02 9.2444E-02 -4.0605E-02 7.6388E-03 -6.7988E-04 -6.5163E-05 9.3878E-05
S10 -93.6168 1.3236E-03 4.5376E-03 -4.3742E-04 -2.3557E-05 2.5276E-06 -4.3520E-06 1.2315E-06
S11 -20.2528 -2.5380E-02 -3.1886E-04 -1.0993E-04 9.7535E-05 -1.8162E-06 -2.2469E-07 -1.2715E-07
S12 3.2373 -1.3835E-05 -8.3089E-04 7.2241E-05 -1.1919E-05 1.1266E-06 3.6080E-08 4.0860E-08
TABLE 4
Example 3
An optical lens according to embodiment 3 of the present application is described below with reference to fig. 3. Fig. 3 shows a schematic structural diagram of an optical lens according to embodiment 3 of the present application.
As shown in fig. 3, the optical lens assembly includes, in order from an object side to an image side, a first lens element L1, a second lens element L2, a third lens element L3, a fourth lens element L4, a fifth lens element L5 and a sixth lens element L6.
The first lens L1 is a convex-concave lens with negative refractive power, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens element L2 is a concave-convex lens element with negative refractive power, and has a concave object-side surface S3 and a convex image-side surface S4. The third lens element L3 is a biconvex lens with positive refractive power, and has a convex object-side surface S5 and a convex image-side surface S6. The fourth lens element L4 is a biconvex lens element with positive refractive power, and has a convex object-side surface S8 and a convex image-side surface S9. The fifth lens element L5 is a biconcave lens element with negative refractive power, and has a concave object-side surface S9 and a concave image-side surface S10. The sixth lens element L6 is a biconvex lens with positive refractive power, and has a convex object-side surface S11 and a convex image-side surface S12. The fourth lens L4 and the fifth lens L5 may be cemented to constitute a cemented lens.
The optical lens may further include a stop STO, which may be disposed between the third lens L3 and the fourth lens L4 to improve imaging quality. For example, the stop STO may be disposed between the third lens L3 and the fourth lens L4 at a position close to the image side surface S6 of the third lens L3.
Optionally, the optical lens may further include a filter L7 and/or a cover glass L7' having an object side surface S13 and an image side surface S14. The filter L7 and/or the protective glass L7' may be used to correct color deviation and/or protect the image sensing chip IMA located at the imaging plane. The light from the object passes through the respective surfaces S1 to S14 in order and is finally imaged on the imaging plane.
Table 5 shows the radius of curvature R, thickness/distance d, refractive index Nd, and abbe number Vd of each lens of the optical lens of example 3. Table 6 shows cone coefficients and high-order term coefficients that can be used for each aspherical mirror surface in example 3, wherein each aspherical mirror surface type can be defined by formula (1) given in example 1 above.
Figure BDA0003020144240000181
TABLE 5
Flour mark k A4 A6 A8 A10 A12 A14 A16
S1 -0.8970 -2.7985E-03 -1.3090E-03 5.8644E-05 6.3835E-07 -4.1763E-08 -4.2498E-11 -7.1090E-12
S2 -0.8955 3.6021E-02 -3.1005E-03 1.1669E-03 -2.0834E-04 -3.3005E-06 -4.2868E-09 1.7920E-10
S3 2.3873 2.7145E-02 -1.6549E-03 5.9019E-04 -4.6983E-05 6.4226E-06 2.0235E-06 -1.9607E-07
S4 0.5657 1.2280E-02 -2.2361E-03 2.2057E-04 -2.9991E-05 1.0528E-05 8.6102E-07 -1.6893E-06
S8 -0.7950 9.3528E-04 -3.1564E-03 1.2391E-03 -4.9117E-04 1.5119E-04 2.8337E-05 -5.2729E-05
S9 -0.4182 -1.0059E-01 8.3944E-02 -3.4305E-02 4.0762E-03 -6.7988E-04 -6.5163E-05 9.3878E-05
S10 -10.9468 1.3060E-03 5.1405E-03 -5.2853E-04 -3.6028E-05 2.5276E-06 -4.3520E-06 1.2315E-06
S11 -18.5636 -4.8649E-03 -2.2536E-04 -6.5307E-05 7.3709E-05 -1.8162E-06 -2.2469E-07 -1.2715E-07
S12 5.3164 7.7442E-04 -7.9419E-04 8.9852E-05 -1.0995E-05 1.1266E-06 3.6080E-08 4.0860E-08
TABLE 6
Example 4
An optical lens according to embodiment 4 of the present application is described below with reference to fig. 4. Fig. 4 shows a schematic structural diagram of an optical lens according to embodiment 4 of the present application.
As shown in fig. 4, the optical lens assembly includes, in order from an object side to an image side, a first lens element L1, a second lens element L2, a third lens element L3, a fourth lens element L4, a fifth lens element L5 and a sixth lens element L6.
The first lens L1 is a convex-concave lens with negative refractive power, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens element L2 is a concave-convex lens element with negative refractive power, and has a concave object-side surface S3 and a convex image-side surface S4. The third lens element L3 is a biconvex lens element with positive refractive power, and has a convex object-side surface S5 and a convex image-side surface S6. The fourth lens element L4 is a biconvex lens element with positive refractive power, and has a convex object-side surface S8 and a convex image-side surface S9. The fifth lens element L5 is a biconcave lens element with negative refractive power, and has a concave object-side surface S9 and a concave image-side surface S10. The sixth lens element L6 is a biconvex lens with positive refractive power, and has a convex object-side surface S11 and a convex image-side surface S12. The fourth lens L4 and the fifth lens L5 may be cemented to constitute a cemented lens.
The optical lens may further include a stop STO, which may be disposed between the third lens L3 and the fourth lens L4 to improve imaging quality. For example, the stop STO may be disposed between the third lens L3 and the fourth lens L4 at a position close to the image side surface S6 of the third lens L3.
Optionally, the optical lens may further include a filter L7 and/or a cover glass L7' having an object side surface S13 and an image side surface S14. The filter L7 and/or the protective glass L7' may be used to correct color deviation and/or protect the image sensing chip IMA located at the imaging plane. The light from the object passes through the respective surfaces S1 to S14 in order and is finally imaged on the imaging plane.
Table 7 shows the radius of curvature R, thickness/distance d, refractive index Nd, and abbe number Vd of each lens of the optical lens of example 4. Table 8 shows conic coefficients and high-order term coefficients that can be used for each aspherical mirror surface in example 4, wherein each aspherical mirror surface type can be defined by formula (1) given in example 1 above.
Figure BDA0003020144240000191
Figure BDA0003020144240000201
TABLE 7
Flour mark k A4 A6 A8 A10 A12 A14 A16
S1 -0.9222 -2.9768E-03 -1.3465E-03 6.6045E-05 4.2150E-07 -4.1763E-08 -4.2498E-11 -7.1090E-12
S2 -0.9063 3.4700E-02 -2.8095E-03 8.8522E-04 -1.5102E-04 -3.3005E-06 -4.2868E-09 1.7920E-10
S3 0.9569 4.2260E-02 -3.5021E-03 8.7116E-04 -4.1029E-05 6.4226E-06 2.0235E-06 -1.9607E-07
S4 -23.8411 1.1556E-02 3.0276E-05 -5.9970E-04 8.7460E-05 1.0528E-05 8.6102E-07 -1.6893E-06
S8 1.8903 2.8571E-03 -2.4952E-03 6.9284E-04 -3.7875E-04 1.5119E-04 2.8337E-05 -5.2729E-05
S9 -0.7379 -1.0680E-01 9.6967E-02 -4.2768E-02 8.2155E-03 -6.7988E-04 -6.5163E-05 9.3878E-05
S10 -12.4287 5.2542E-03 4.4723E-03 -3.3821E-04 -7.4958E-05 2.5276E-06 -4.3520E-06 1.2315E-06
S11 -18.1112 -4.0101E-03 -1.6934E-04 -5.4815E-05 6.6900E-05 -1.8162E-06 -2.2469E-07 -1.2715E-07
S12 5.6417 1.7589E-03 -9.5215E-04 1.0870E-04 -1.1112E-05 1.1266E-06 3.6080E-08 4.0860E-08
TABLE 8
Example 5
An optical lens according to embodiment 5 of the present application is described below with reference to fig. 5. Fig. 5 shows a schematic structural diagram of an optical lens according to embodiment 5 of the present application.
As shown in fig. 5, the optical lens assembly includes, in order from an object side to an image side, a first lens element L1, a second lens element L2, a third lens element L3, a fourth lens element L4, a fifth lens element L5 and a sixth lens element L6.
The first lens L1 is a convex-concave lens with negative refractive power, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens element L2 is a biconcave lens element with negative refractive power, and has a concave object-side surface S3 and a concave image-side surface S4. The third lens element L3 is a biconvex lens with positive refractive power, and has a convex object-side surface S5 and a convex image-side surface S6. The fourth lens element L4 is a biconvex lens with positive refractive power, and has a convex object-side surface S8 and a convex image-side surface S9. The fifth lens element L5 is a biconcave lens element with negative refractive power, and has a concave object-side surface S9 and a concave image-side surface S10. The sixth lens element L6 is a convex-concave lens element having positive refractive power, and has a convex object-side surface S11 and a concave image-side surface S12. The fourth lens L4 and the fifth lens L5 may be cemented to constitute a cemented lens.
The optical lens may further include a stop STO, which may be disposed between the third lens L3 and the fourth lens L4 to improve imaging quality. For example, the stop STO may be disposed between the third lens L3 and the fourth lens L4 at a position close to the image side surface S6 of the third lens L3.
Optionally, the optical lens may further include a filter L7 and/or a cover glass L7' having an object side surface S13 and an image side surface S14. The filter L7 and/or the protective glass L7' may be used to correct color deviation and/or protect the image sensing chip IMA located at the imaging plane. The light from the object passes through the respective surfaces S1 to S14 in order and is finally imaged on the imaging plane.
Table 9 shows the radius of curvature R, thickness/distance d, refractive index Nd, and abbe number Vd of each lens of the optical lens of example 5. Table 10 shows conic coefficients and high-order term coefficients that can be used for each aspherical mirror surface in example 5, wherein each aspherical mirror surface type can be defined by formula (1) given in example 1 above.
Figure BDA0003020144240000211
TABLE 9
Flour mark k A4 A6 A8 A10 A12 A14 A16
S1 -0.8521 7.8601E-04 -1.4761E-03 4.6987E-05 2.0711E-06 -4.1763E-08 -4.2498E-11 -7.1090E-12
S2 -0.9316 2.7962E-02 -3.6889E-03 9.6999E-04 -1.3057E-04 -3.3005E-06 -4.2868E-09 1.7920E-10
S3 1.5076 4.3605E-02 -7.2327E-03 1.7963E-03 -2.1084E-04 6.4226E-06 2.0235E-06 -1.9607E-07
S4 11.0000 3.0953E-02 -5.9833E-03 9.3467E-04 -7.0253E-05 1.0528E-05 8.6102E-07 -1.6893E-06
S8 4.3921 -1.3218E-02 -5.3868E-03 8.9691E-04 -1.3426E-03 1.5119E-04 2.8337E-05 -5.2729E-05
S9 -0.9874 -7.1817E-02 1.2629E-02 4.4383E-03 -2.2975E-03 -6.7988E-04 -6.5163E-05 9.3878E-05
S10 -15.0000 -2.7137E-02 1.0947E-02 -1.4002E-03 6.5631E-05 2.5276E-06 -4.3520E-06 1.2315E-06
S11 -1.6891 -2.6065E-02 3.7261E-03 -1.1618E-03 2.0722E-04 -1.8162E-06 -2.2469E-07 -1.2715E-07
S12 5.0000 8.6636E-03 -5.4187E-03 6.7508E-04 -2.6886E-05 1.1266E-06 3.6080E-08 4.0860E-08
Watch 10
Example 6
An optical lens according to embodiment 6 of the present application is described below with reference to fig. 6. Fig. 6 shows a schematic structural diagram of an optical lens according to embodiment 6 of the present application.
As shown in fig. 6, the optical lens assembly includes, in order from an object side to an image side, a first lens element L1, a second lens element L2, a third lens element L3, a fourth lens element L4, a fifth lens element L5 and a sixth lens element L6.
The first lens L1 is a convex-concave lens with negative refractive power, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens element L2 is a biconcave lens element with negative refractive power, and has a concave object-side surface S3 and a concave image-side surface S4. The third lens element L3 is a biconvex lens element with positive refractive power, and has a convex object-side surface S5 and a convex image-side surface S6. The fourth lens element L4 is a biconvex lens element with positive refractive power, and has a convex object-side surface S8 and a convex image-side surface S9. The fifth lens element L5 is a biconcave lens element with negative refractive power, and has a concave object-side surface S9 and a concave image-side surface S10. The sixth lens element L6 is a convex-concave lens element having positive refractive power, and has a convex object-side surface S11 and a concave image-side surface S12. The fourth lens L4 and the fifth lens L5 may be cemented to constitute a cemented lens.
The optical lens may further include a stop STO, which may be disposed between the third lens L3 and the fourth lens L4 to improve imaging quality. For example, the stop STO may be disposed between the third lens L3 and the fourth lens L4 at a position close to the image side surface S6 of the third lens L3.
Optionally, the optical lens may further include a filter L7 and/or a cover glass L7' having an object side surface S13 and an image side surface S14. The filter L7 and/or the protective glass L7' may be used to correct color deviation and/or protect the image sensing chip IMA located at the imaging plane. The light from the object passes through the respective surfaces S1 to S14 in order and is finally imaged on the imaging plane.
Table 11 shows the radius of curvature R, thickness/distance d, refractive index Nd, and abbe number Vd of each lens of the optical lens of example 6. Table 12 shows conic coefficients and high-order term coefficients that can be used for each aspherical mirror surface in example 6, wherein each aspherical mirror surface type can be defined by formula (1) given in example 1 above.
Figure BDA0003020144240000221
TABLE 11
Flour mark k A4 A6 A8 A10 A12 A14 A16
S1 -0.5984 3.1827E-03 -1.6380E-03 8.1283E-05 1.2657E-07 -4.1763E-08 -4.2498E-11 -7.1090E-12
S2 -0.8689 3.0523E-02 -7.2640E-04 -4.0575E-06 2.8367E-05 -3.3005E-06 -4.2868E-09 1.7920E-10
S3 1.3709 4.8231E-02 -6.9965E-03 1.9390E-03 -1.7773E-04 6.4226E-06 2.0235E-06 -1.9607E-07
S4 -4.1546 3.1725E-02 -6.0996E-03 1.0797E-03 -1.3240E-04 1.0528E-05 8.6102E-07 -1.6893E-06
S8 2.5786 -1.3370E-02 -2.6644E-03 -7.1865E-04 -5.2753E-04 1.5119E-04 2.8337E-05 -5.2729E-05
S9 -0.9445 -7.2754E-02 1.9985E-02 -2.0562E-03 1.0268E-03 -6.7988E-04 -6.5163E-05 9.3878E-05
S10 -99.0000 -2.6844E-02 9.6761E-03 -9.6011E-04 4.8594E-05 2.5276E-06 -4.3520E-06 1.2315E-06
S11 -1.5328 -2.9253E-02 4.0504E-03 -1.0846E-03 1.9893E-04 -1.8162E-06 -2.2469E-07 -1.2715E-07
S12 -99.0000 1.1920E-02 -6.2928E-03 8.7401E-04 -3.8381E-05 1.1266E-06 3.6080E-08 4.0860E-08
TABLE 12
Example 7
An optical lens according to embodiment 7 of the present application is described below with reference to fig. 7. Fig. 7 shows a schematic structural diagram of an optical lens according to embodiment 7 of the present application.
As shown in fig. 7, the optical lens assembly includes, in order from an object side to an image side, a first lens element L1, a second lens element L2, a third lens element L3, a fourth lens element L4, a fifth lens element L5 and a sixth lens element L6.
The first lens L1 is a convex-concave lens with negative refractive power, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens element L2 is a biconcave lens element with negative refractive power, and has a concave object-side surface S3 and a concave image-side surface S4. The third lens element L3 is a biconvex lens element with positive refractive power, and has a convex object-side surface S5 and a convex image-side surface S6. The fourth lens element L4 is a biconcave lens element with negative refractive power, and has a concave object-side surface S8 and a concave image-side surface S9. The fifth lens element L5 is a biconvex lens element with positive refractive power, and has a convex object-side surface S9 and a convex image-side surface S10. The sixth lens element L6 is a biconvex lens with positive refractive power, and has a convex object-side surface S11 and a convex image-side surface S12. The fourth lens L4 and the fifth lens L5 may be cemented to constitute a cemented lens.
The optical lens may further include a stop STO, which may be disposed between the third lens L3 and the fourth lens L4 to improve imaging quality. For example, the stop STO may be disposed between the third lens L3 and the fourth lens L4 at a position close to the image side surface S6 of the third lens L3.
Optionally, the optical lens may further include a filter L7 and/or a cover glass L7' having an object side surface S13 and an image side surface S14. The filter L7 and/or the protective glass L7' may be used to correct color deviation and/or protect the image sensing chip IMA located at the imaging plane. The light from the object passes through the respective surfaces S1 to S14 in order and is finally imaged on the imaging plane.
Table 13 shows the radius of curvature R, thickness/distance d, refractive index Nd, and abbe number Vd of each lens of the optical lens of example 7. Table 14 shows conic coefficients and high-order term coefficients that can be used for each aspherical mirror surface in example 7, wherein each aspherical mirror surface type can be defined by formula (1) given in example 1 above.
Figure BDA0003020144240000231
Figure BDA0003020144240000241
Watch 13
Flour mark k A4 A6 A8 A10 A12 A14 A16
S3 -2.2696 -1.0371E-04 3.2961E-03 -8.5555E-04 -3.6082E-05 3.9134E-05 9.2655E-07 -1.1331E-06
S4 7.1335 3.2733E-02 -1.5075E-03 3.8192E-04 -5.0318E-06 -1.1226E-05 -5.8576E-06 1.0320E-06
S8 -99.0000 8.5156E-04 2.7359E-03 -9.6965E-04 -3.1151E-04 3.5322E-05 1.5668E-07 2.7801E-07
S9 -0.3032 -6.2117E-02 2.5686E-02 -1.0720E-02 1.9241E-03 -3.1633E-04 -1.3433E-04 4.3159E-05
S10 -84.0379 -5.3027E-02 3.6953E-02 -1.3190E-02 1.5306E-03 1.0392E-04 9.4024E-05 -2.8065E-05
S11 -1.1947 -1.2366E-02 -2.0518E-02 2.5169E-02 -1.5258E-02 4.6529E-03 -6.5747E-04 3.3018E-05
S12 -8.7578 -7.3011E-03 -5.4199E-03 3.5765E-03 -1.2463E-03 2.0186E-04 -1.0300E-05 -2.6865E-07
TABLE 14
Example 8
An optical lens according to embodiment 8 of the present application is described below with reference to fig. 8. Fig. 8 shows a schematic structural diagram of an optical lens according to embodiment 8 of the present application.
As shown in fig. 8, the optical lens assembly includes, in order from an object side to an image side, a first lens element L1, a second lens element L2, a third lens element L3, a fourth lens element L4, a fifth lens element L5 and a sixth lens element L6.
The first lens L1 is a convex-concave lens with negative refractive power, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens element L2 is a biconcave lens element with negative refractive power, and has a concave object-side surface S3 and a concave image-side surface S4. The third lens element L3 is a biconvex lens element with positive refractive power, and has a convex object-side surface S5 and a convex image-side surface S6. The fourth lens element L4 is a biconcave lens element with negative refractive power, and has a concave object-side surface S8 and a concave image-side surface S9. The fifth lens element L5 is a biconvex lens element with positive refractive power, and has a convex object-side surface S9 and a convex image-side surface S10. The sixth lens element L6 is a biconvex lens with positive refractive power, and has a convex object-side surface S11 and a convex image-side surface S12. The fourth lens L4 and the fifth lens L5 may be cemented to constitute a cemented lens.
The optical lens may further include a stop STO, which may be disposed between the third lens L3 and the fourth lens L4 to improve imaging quality. For example, the stop STO may be disposed between the third lens L3 and the fourth lens L4 at a position close to the image side surface S6 of the third lens L3.
Optionally, the optical lens may further include a filter L7 and/or a cover glass L7' having an object side surface S13 and an image side surface S14. The filter L7 and/or the protective glass L7' may be used to correct color deviation and/or protect the image sensing chip IMA located at the imaging plane. The light from the object passes through the respective surfaces S1 to S14 in order and is finally imaged on the imaging plane.
Table 15 shows the radius of curvature R, thickness/distance d, refractive index Nd, and abbe number Vd of each lens of the optical lens of example 8. Table 16 shows conic coefficients and high-order term coefficients that can be used for each aspherical mirror surface in example 8, wherein each aspherical mirror surface type can be defined by formula (1) given in example 1 above.
Figure BDA0003020144240000251
Watch 15
Flour mark k A4 A6 A8 A10 A12 A14 A16
S3 -5.1872 1.4457E-02 2.1003E-04 -3.9071E-04 -6.5927E-05 3.9134E-05 9.2655E-07 -1.1331E-06
S4 5.0745 4.9501E-02 -5.7203E-03 1.3819E-03 -1.7657E-04 -1.1226E-05 -5.8576E-06 1.0320E-06
S8 11.2143 2.7268E-04 5.5774E-03 -2.4974E-03 1.0063E-04 3.5322E-05 1.5668E-07 2.7801E-07
S9 -0.3339 -7.1315E-02 3.7746E-02 -1.5733E-02 2.7125E-03 -3.1633E-04 -1.3433E-04 4.3159E-05
S10 -99.0000 -5.6221E-02 4.0881E-02 -1.5082E-02 1.8318E-03 1.0392E-04 9.4024E-05 -2.8065E-05
S11 -99.0000 -6.6037E-03 -1.9900E-02 2.4524E-02 -1.5159E-02 4.6529E-03 -6.5747E-04 3.3018E-05
S12 90.6162 -8.8150E-03 -4.6118E-03 3.4034E-03 -1.2303E-03 2.0186E-04 -1.0300E-05 -2.6865E-07
TABLE 16
In summary, examples 1 to 8 satisfy the relationships shown in the following tables 17-1 and 17-2, respectively. In tables 17-1 and 17-2, D, H, R, R2, R3, R4, R5, R6, R8, R9, F, F, BFL, TTL, d1, d34, d3, F1, F2, F3, F4, F5, F6 are in units of millimeters (mm) and FOV is in units of degrees (°).
Figure BDA0003020144240000252
Figure BDA0003020144240000261
Figure BDA0003020144240000271
TABLE 17-1
Figure BDA0003020144240000272
Figure BDA0003020144240000281
TABLE 17-2
The present application also provides an electronic device that may include the optical lens according to the above-described embodiments of the present application and an imaging element for converting an optical image formed by the optical lens into an electrical signal. The electronic device may be a stand-alone electronic device such as a range finding camera or may be an imaging module integrated on a device such as a range finding device. In addition, the electronic device may also be a separate imaging device such as a vehicle-mounted camera, or may be an imaging module integrated on a system such as a driving assistance system.
The above description is only a preferred embodiment of the application and is illustrative of the principles of the technology employed. It will be appreciated by a person skilled in the art that the scope of the invention as referred to in the present application is not limited to the embodiments with a specific combination of the above-mentioned features, but also covers other embodiments with any combination of the above-mentioned features or their equivalents without departing from the inventive concept. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.

Claims (10)

1. An optical lens assembly, in order from an object side to an image side along an optical axis, comprising:
a first lens element having a negative refractive power, the object-side surface of which is convex and the image-side surface of which is concave;
a second lens having a negative refractive power, the object side surface of which is concave;
a third lens with positive focal power, wherein the object side surface of the third lens is a convex surface, and the image side surface of the third lens is a convex surface;
a fourth lens having an optical power;
a fifth lens having optical power; and
and the object side surface of the sixth lens with positive focal power is a convex surface.
2. An optical lens barrel according to claim 1, wherein the image side surface of the second lens is concave.
3. An optical lens barrel according to claim 1, wherein the image side surface of the second lens element is convex.
4. An optical lens as claimed in claim 1, characterized in that the fourth lens element has a positive optical power and has a convex object-side surface and a convex image-side surface.
5. An optical lens barrel according to claim 1, wherein the fourth lens element has a negative power, and has a concave object-side surface and a concave image-side surface.
6. An optical lens barrel according to claim 1, wherein the fifth lens element has a negative power, and has a concave object-side surface and a concave image-side surface.
7. An optical lens barrel according to claim 1, wherein the fifth lens element has a positive power, and has a convex object-side surface and a convex image-side surface.
8. An optical lens barrel according to claim 1, wherein the image side surface of the sixth lens element is convex.
9. The optical lens assembly, in order from an object side to an image side along an optical axis, comprises:
a first lens having a negative optical power;
a second lens having a negative optical power;
a third lens having a positive optical power;
a fourth lens having an optical power;
a fifth lens having optical power; and
a sixth lens having positive optical power;
the distance TTL from the center of the object side surface of the first lens to the imaging surface of the optical lens on the optical axis and the total effective focal length F of the optical lens under visible light meet the following conditions: TTL/F is less than or equal to 5.8.
10. An electronic apparatus, characterized by comprising the optical lens according to any one of claims 1 to 9 and an imaging element for converting an optical image formed by the optical lens into an electrical signal.
CN202110400272.0A 2021-04-14 2021-04-14 Optical lens and electronic device Pending CN115201998A (en)

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CN110187479A (en) * 2019-07-15 2019-08-30 浙江舜宇光学有限公司 Optical imaging lens
CN110967806A (en) * 2018-09-30 2020-04-07 宁波舜宇车载光学技术有限公司 Optical lens
CN111781716A (en) * 2020-08-12 2020-10-16 厦门力鼎光电股份有限公司 Glass-plastic mixed fisheye lens
CN112147754A (en) * 2019-06-28 2020-12-29 宁波舜宇车载光学技术有限公司 Optical lens and electronic device

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110967806A (en) * 2018-09-30 2020-04-07 宁波舜宇车载光学技术有限公司 Optical lens
CN109445077A (en) * 2019-01-10 2019-03-08 宁波舜宇车载光学技术有限公司 Optical lens and imaging device
CN112147754A (en) * 2019-06-28 2020-12-29 宁波舜宇车载光学技术有限公司 Optical lens and electronic device
CN110187479A (en) * 2019-07-15 2019-08-30 浙江舜宇光学有限公司 Optical imaging lens
CN111781716A (en) * 2020-08-12 2020-10-16 厦门力鼎光电股份有限公司 Glass-plastic mixed fisheye lens

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