CN114089500A - Optical lens and electronic device - Google Patents
Optical lens and electronic device Download PDFInfo
- Publication number
- CN114089500A CN114089500A CN202010857110.5A CN202010857110A CN114089500A CN 114089500 A CN114089500 A CN 114089500A CN 202010857110 A CN202010857110 A CN 202010857110A CN 114089500 A CN114089500 A CN 114089500A
- Authority
- CN
- China
- Prior art keywords
- lens
- optical
- image
- convex
- concave
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000003287 optical effect Effects 0.000 title claims abstract description 263
- 238000003384 imaging method Methods 0.000 claims description 47
- 230000004075 alteration Effects 0.000 description 19
- 239000011521 glass Substances 0.000 description 17
- 230000001681 protective effect Effects 0.000 description 13
- 230000009286 beneficial effect Effects 0.000 description 9
- 238000010586 diagram Methods 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 6
- 230000035945 sensitivity Effects 0.000 description 6
- 235000013312 flour Nutrition 0.000 description 5
- 230000005499 meniscus Effects 0.000 description 5
- 230000004304 visual acuity Effects 0.000 description 5
- 238000012937 correction Methods 0.000 description 3
- 230000014509 gene expression Effects 0.000 description 3
- 229910052739 hydrogen Inorganic materials 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 238000004026 adhesive bonding Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 238000005286 illumination Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
- G02B13/0015—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design
- G02B13/002—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface
- G02B13/0045—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface having five or more lenses
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
- G02B13/0055—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras employing a special optical element
- G02B13/006—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras employing a special optical element at least one element being a compound optical element, e.g. cemented elements
-
- 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
Landscapes
- 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 from an object side to an image side along an optical axis: the first lens with negative focal power, the object side surface of the first lens is a concave surface, and the image side surface of the first lens is a concave surface; the second lens with positive focal power has a convex object-side surface and a convex image-side surface; 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; the fourth lens with positive focal power has a convex object-side surface and a convex image-side surface; a fifth lens element with negative refractive power, the object-side surface of which is concave and the image-side surface of which is concave; a sixth lens element with positive refractive power having a convex object-side surface and a concave image-side surface; and a seventh lens having optical power.
Description
Technical Field
The present disclosure relates to the field of optical elements, and more particularly, to an optical lens and an electronic device.
Background
In recent years, with the rapid development of automobile driving assistance systems, optical lenses are increasingly widely applied to automobiles. In order to meet the application requirements of the vehicular front-view lens, more and more lens manufacturers begin to research how to improve the identification degree of the vehicular front-view lens to the traffic lights. In addition, for safety reasons, an optical lens used as an in-vehicle front view lens is also required to have high imaging performance at the same time.
At present, in order to improve the resolving power of the existing vehicle-mounted optical lens, most lens manufacturers usually increase the number of lenses to improve the resolving power of the lens, but this will affect the miniaturization of the lens to a certain extent. In addition, in view of a special application scenario of the in-vehicle front view lens, the optical lens used as the in-vehicle front view lens is also required to have excellent performance in terms of chromatic aberration so that it can accurately recognize red and green traffic lights, thereby contributing to safe driving of the vehicle.
Disclosure of Invention
An 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: the first lens with negative focal power, the object side surface of the first lens is a concave surface, and the image side surface of the first lens is a concave surface; the second lens with positive focal power has a convex object-side surface and a convex image-side surface; 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; the fourth lens with positive focal power has a convex object-side surface and a convex image-side surface; a fifth lens element with negative refractive power, the object-side surface of which is concave and the image-side surface of which is concave; a sixth lens element with positive refractive power having a convex object-side surface and a concave image-side surface; and a seventh lens having optical power.
In one embodiment, the first lens and the second lens are cemented to form a cemented lens.
In one embodiment, the seventh lens element has positive optical power, and the object side surface of the seventh lens element is concave and the image side surface of the seventh lens element is convex.
In one embodiment, the seventh lens element has a negative power and has a concave object-side surface and a convex image-side surface.
In one embodiment, the seventh lens element has a negative optical power, and the object side surface is concave and the image side surface is concave.
In one embodiment, the fourth lens and the fifth lens are cemented to form a cemented lens.
In one embodiment, the third lens and the seventh lens each have an aspherical mirror surface.
In one embodiment, a distance TTL between a center of an object side surface of the first lens element and an imaging surface of the optical lens on an optical axis and a total effective focal length F of the optical lens may satisfy: TTL/F is less than or equal to 5.5.
In one embodiment, a distance BFL on the optical axis from the center of the image-side surface of the seventh lens to the imaging surface of the optical 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: BFL/TTL is more than or equal to 0.05.
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 0.08.
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 1 and less than or equal to 2.5.
In one embodiment, the effective focal length F1 of the first lens and the total effective focal length F of the optical lens may satisfy: the absolute value of F1/F is more than or equal to 1 and less than or equal to 3.
In one embodiment, the abbe number Vd3 of the third lens and the abbe number Vd4 of the fourth lens may satisfy: vd3+ Vd4 is less than or equal to 150.
In one embodiment, the effective focal length F1 of the first lens and the effective focal length F2 of the second lens may satisfy: the absolute value of F1/F2 is more than or equal to 0.1 and less than or equal to 2.
In one embodiment, 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: and the l (R3-R4)/(R3+ R4) l is equal to or more than 0.5.
In one embodiment, the combined focal length F45 of the fourth and fifth lenses and the total effective focal length F of the optical lens may satisfy: i F45/F | ≧ 1.
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 absolute value of R1/R2 is more than or equal to 0.2 and less than or equal to 6.5.
In one embodiment, the total effective focal length F of the optical lens and the radius of curvature R1 of the object side surface of the first lens can satisfy: the absolute value of F/R1 is more than or equal to 0.25 and less than or equal to 1.5.
In one embodiment, the maximum field angle FOV of the optical lens, the total effective focal length F of the optical lens, and the image height H corresponding to the maximum field angle of the optical lens may satisfy: (FOV multiplied by F)/H is more than or equal to 50 degrees.
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 of the optical lens, and a maximum field angle FOV of the optical lens may satisfy: TTL/H/FOV is less than or equal to 0.15.
In one embodiment, 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 | R3/R4| ≧ 0.1.
In one embodiment, the effective focal length F12 of the cemented lens formed by the first lens and the second lens and the total effective focal length F of the optical lens satisfy: the absolute value of F12/F is more than or equal to 1 and less than or equal to 5.
In one embodiment, the radius of curvature R72 of the image-side surface of the seventh lens and the total effective focal length F of the optical lens satisfy: R72/F is ≦ 30 ≦ 0.
In one embodiment, a distance d12 between the center of the image-side surface of the sixth lens and the center of the object-side surface of the seventh lens on the optical axis and a distance TTL between the center of the object-side surface of the first lens and the imaging surface of the optical lens on the optical axis may satisfy: d12/TTL is more than or equal to 0.06.
Another aspect of the present application provides such 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 positive optical power; a third lens having a positive optical power; a fourth lens having a positive optical power; a fifth lens having a negative optical power; a sixth lens having positive optical power; and a seventh lens having optical power; the fourth lens and the fifth lens are cemented to form a cemented lens; and a distance d12 between the center of the image-side surface of the sixth lens element and the center of the object-side surface of the seventh lens element on the optical axis and a distance TTL between the center of the object-side surface of the first lens element and the imaging surface of the optical lens element on the optical axis satisfy: d12/TTL is more than or equal to 0.06. In one embodiment, the object side surface of the first lens is concave and the image side surface is concave; the object side surface of the second lens is a convex surface, and the image side surface of the second lens is a convex surface; 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; 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; the object side surface of the fifth lens is a concave surface, and the image side surface of the fifth lens is a concave surface; the object side surface of the sixth lens element is convex, and the image side surface of the sixth lens element is concave.
In one embodiment, the seventh lens element has positive optical power, and the object side surface of the seventh lens element is concave and the image side surface of the seventh lens element is convex.
In one embodiment, the seventh lens element has a negative power and has a concave object-side surface and a convex image-side surface.
In one embodiment, the seventh lens element has a negative optical power, and the object side surface is concave and the image side surface is concave.
In one embodiment, the first lens and the second lens are cemented to form a cemented lens.
In one embodiment, the third lens and the seventh lens each have an aspherical mirror surface.
In one embodiment, a distance TTL between a center of an object side surface of the first lens element and an imaging surface of the optical lens on an optical axis and a total effective focal length F of the optical lens may satisfy: TTL/F is less than or equal to 5.5.
In one embodiment, a distance BFL on the optical axis from the center of the image-side surface of the seventh lens to the imaging surface of the optical 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: BFL/TTL is more than or equal to 0.05.
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 0.08.
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 1 and less than or equal to 2.5.
In one embodiment, the effective focal length F1 of the first lens and the total effective focal length F of the optical lens may satisfy: the absolute value of F1/F is more than or equal to 1 and less than or equal to 3.
In one embodiment, the effective focal length F1 of the first lens and the effective focal length F2 of the second lens may satisfy: the absolute value of F1/F2 is more than or equal to 0.1 and less than or equal to 2.
In one embodiment, 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: and the l (R3-R4)/(R3+ R4) l is equal to or more than 0.5.
In one embodiment, the combined focal length F45 of the fourth and fifth lenses and the total effective focal length F of the optical lens may satisfy: i F45/F | ≧ 1.
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 absolute value of R1/R2 is more than or equal to 0.2 and less than or equal to 6.5.
In one embodiment, the total effective focal length F of the optical lens and the radius of curvature R1 of the object side surface of the first lens can satisfy: the absolute value of F/R1 is more than or equal to 0.25 and less than or equal to 1.5.
In one embodiment, the maximum field angle FOV of the optical lens, the total effective focal length F of the optical lens, and the image height H corresponding to the maximum field angle of the optical lens may satisfy: (FOV multiplied by F)/H is more than or equal to 50 degrees.
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 of the optical lens, and a maximum field angle FOV of the optical lens may satisfy: TTL/H/FOV is less than or equal to 0.15.
In one embodiment, 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 | R3/R4| ≧ 0.1.
In one embodiment, the abbe number Vd3 of the third lens and the abbe number Vd4 of the fourth lens may satisfy: vd3+ Vd4 is less than or equal to 150.
In one embodiment, the effective focal length F12 of the cemented lens formed by the first lens and the second lens and the total effective focal length F of the optical lens satisfy: the absolute value of F12/F is more than or equal to 1 and less than or equal to 5.
In one embodiment, the radius of curvature R72 of the image-side surface of the seventh lens and the total effective focal length F of the optical lens satisfy: R72/F is ≦ 30 ≦ 0.
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.
The optical lens has the beneficial effects of high resolution, miniaturization, small chromatic aberration, low cost, good temperature performance and the like by adopting the seven lenses and optimally setting the shapes, focal powers and the like of the lenses.
Drawings
Other features, objects, and advantages of the present application will become more apparent from the following detailed description of non-limiting 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; and
fig. 6 is a schematic view showing a structure of an optical lens according to embodiment 6 of the present application.
Detailed Description
For a better understanding of the present application, various aspects of the present application will be described in more detail with reference to the accompanying drawings. It should be understood that the detailed description is merely illustrative of exemplary embodiments of the 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, seven lenses having optical powers, i.e., a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens. The seven 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 surface 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 biconcave type. The focal power and the surface type of the first lens can ensure that light rays can accurately and stably enter a rear optical system, the resolution quality is improved, light rays with a large visual field can be collected as far as possible, and the light transmission quantity is increased. The first lens may be a spherical lens. The first lens is a spherical lens, so that a waterproof film can be easily plated on the first lens, and meanwhile, the processing cost can be reduced.
In an exemplary embodiment, the second lens may have a positive optical power. The second lens may have a biconvex shape. The arrangement of the focal power and the surface type of the second lens is beneficial to light convergence, the reduction of the caliber and the cylinder length of the optical lens barrel and the miniaturization.
In an exemplary embodiment, the third lens may have a positive optical power. The third lens may have a biconvex surface type. The focal power and the surface type of the third lens are favorable for light convergence, the caliber and the cylinder length of the optical lens barrel are reduced, and miniaturization is realized.
In an exemplary embodiment, the fourth lens may have a positive optical power. The fourth lens may have a double convex surface type.
In an exemplary embodiment, the fifth lens may have a negative power. The fifth lens may have a biconcave type.
In an exemplary embodiment, the sixth lens may have a positive optical power. The sixth lens may have a convex-concave type. The arrangement of the focal power and the surface type of the sixth lens is beneficial to light convergence, the reduction of the caliber and the cylinder length of the optical lens barrel and the miniaturization.
In exemplary embodiments, the seventh lens may have a positive power or a negative power. The seventh lens may have a meniscus or a biconcave type. The arrangement of the focal power and the surface type of the seventh lens is beneficial to light convergence, the reduction of the caliber and the cylinder length of the optical lens barrel and the miniaturization. Preferably, the seventh lens has an aspheric mirror surface, which is beneficial to smooth the trend of the front light and improving the resolution quality.
In an exemplary embodiment, the third lens and the seventh lens may have aspherical mirror surfaces, and lens resolution may be improved.
In an exemplary embodiment, an optical lens according to the present application may satisfy: TTL/F is less than or equal to 5.5, 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. More specifically, TTL and F further satisfy: TTL/F is less than or equal to 3. The TTL/F is less than or equal to 5.5, the length of the lens can be effectively limited, and the miniaturization of the lens is facilitated.
In an exemplary embodiment, an optical lens according to the present application may satisfy: TTL is not less than 25mm and not more than 35mm, 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.
In an exemplary embodiment, an optical lens according to the present application may satisfy: and the BFL/TTL is more than or equal to 0.05, wherein the BFL is the distance from the center of the image side surface of the seventh lens to the imaging surface of the optical lens on the optical axis, 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 on the optical axis. More specifically, BFL and TTL further satisfy: BFL/TTL is more than or equal to 0.07 and less than or equal to 0.12. The BFL/TTL is more than or equal to 0.05, so that the back focus BFL is longer on the basis of realizing miniaturization, and the assembly of the module is facilitated. The total length TTL of the optical lens is shorter, the structure is compact, the sensitivity of the lens to MTF is reduced, the production yield is improved, and the production cost is reduced.
In an exemplary embodiment, an optical lens according to the present application may satisfy: D/H/FOV is less than or equal to 0.08, wherein FOV is the maximum angle of view of the optical lens, D is the maximum clear aperture of the object side surface of the first lens corresponding to 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, D, H and the FOV further satisfy: D/H/FOV is less than or equal to 0.06. The D/H/FOV is less than or equal to 0.08, the front port diameter can be smaller, and the miniaturization of the lens is facilitated.
In an exemplary embodiment, an optical lens according to the present application may satisfy: and | F4/F5| is less than or equal to 1 and less than or equal to 2.5, 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 1.2 and less than or equal to 2. The requirement that the absolute value of F4/F5 is more than or equal to 1 and less than or equal to 2.5 is met, the effective focal lengths of the fourth lens and the fifth lens can be close, light can be smoothly transited, and chromatic aberration can be corrected.
In an exemplary embodiment, an optical lens according to the present application may satisfy: and | F1/F | is less than or equal to 1 and less than or equal to 3, wherein F1 is the effective focal length of the first lens, and F is the total effective focal length of the optical lens. More specifically, F1 and F further satisfy: the absolute value of F1/F is more than or equal to 0.7 and less than or equal to 2. The condition that | F1/F | is more than or equal to 1 and less than or equal to 3 is met, more light rays can stably enter the optical lens, and the illumination is improved.
In an exemplary embodiment, an optical lens according to the present application may satisfy: vd3+ Vd4 is less than or equal to 150, wherein Vd3 is the Abbe number of the third lens, and Vd4 is the Abbe number of the fourth lens. More specifically, Vd3 and Vd4 may further satisfy: 140 is not less than Vd3+ Vd4 is not less than 150, and the Vd3+ Vd4 is not less than 150, which is beneficial to correcting chromatic aberration and improving resolution.
In an exemplary embodiment, an optical lens according to the present application may satisfy: and | F1/F2| is less than or equal to 0.1 and less than or equal to 2, wherein F1 is the effective focal length of the first lens, and F2 is the effective focal length of the second lens. More specifically, F1 and F2 may further satisfy: the absolute value of F1/F2 is more than or equal to 0.2 and less than or equal to 1. The condition that the absolute value of F1/F2 is less than or equal to 0.1 is met, light concentration is facilitated, and image quality is improved.
In an exemplary embodiment, an optical lens according to the present application may satisfy: and | (R3-R4)/(R3+ R4) | ≧ 0.5, where R3 is the radius of curvature of the object-side face of the second lens, and R4 is the radius of curvature of the image-side face of the second lens. More specifically, R3 and R4 may further satisfy: and l (R3-R4)/(R3+ R4) l is equal to or more than 1. Satisfy | (R3-R4)/(R3+ R4) | ≧ 0.5, can correct the aberration of this optical system to can guarantee that the light through the first lens is comparatively gentle, thereby can reduce this optical system's tolerance sensitivity.
In an exemplary embodiment, an optical lens according to the present application may satisfy: and | F45/F | ≧ 1, wherein F45 is the combined focal length of the fourth lens and the fifth lens, and F is the total effective focal length of the optical lens. More specifically, F45 and F further satisfy: i F45/F | ≧ 1.2. The requirement that the absolute value of F45/F is more than or equal to 1 is met, thermal compensation is facilitated to be realized, better temperature performance is obtained, and the optical lens system is ensured to have good resolving power at high and low temperatures.
In an exemplary embodiment, an optical lens according to the present application may satisfy: 0.2 ≦ R1/R2 ≦ 6.5, where 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 absolute value of R1/R2 is more than or equal to 0.5 and less than or equal to 5. The requirement that the absolute value of R1/R2 is more than or equal to 0.2 and less than or equal to 6.5 is met, light can smoothly enter the optical lens, and the resolution is improved.
In an exemplary embodiment, an optical lens according to the present application may satisfy: 0.25 ≦ F/R1 ≦ 1.5, where F is the total effective focal length of the optical lens, and R1 is the radius of curvature of the object-side surface of the first lens. More specifically, F and R1 further satisfy: the absolute value of F/R1 is more than or equal to 0.5 and less than or equal to 1.2. Satisfying | F/R1| ≦ 1.5 more than or equal to 0.25, can avoid the first lens object side curvature radius undersize to effectively avoid the generation of aberration when the light enters, and is favorable to the preparation of the first lens.
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 50 degrees, wherein FOV is the maximum angle of view of the optical lens, F is the total effective focal length of the optical lens, and H is the image height corresponding to the maximum angle of view of the optical lens. More specifically, FOV, F and H further satisfy: (FOV multiplied by F)/H is more than or equal to 52 degrees. The requirement that (FOV multiplied by F)/H is more than or equal to 50 degrees is met, the large-angle resolution is favorably realized, and the characteristics of long focus, large field angle and the like are favorably realized.
In an exemplary embodiment, an optical lens according to the present application may satisfy: TTL/H/FOV is less than or equal to 0.15, 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, H is the image height corresponding to the maximum field angle of the optical lens, and FOV is the maximum field angle of the optical lens. More specifically, TTL, H, and FOV further satisfy: TTL/H/FOV is less than or equal to 0.14. The TTL/H/FOV is less than or equal to 0.15, the length of the lens can be effectively limited under the condition of the same imaging surface and the same image height, and the miniaturization of the lens is facilitated.
In an exemplary embodiment, an optical lens according to the present application may satisfy: and | R3/R4| ≧ 0.1, where R3 is the radius of curvature of the object-side surface of the second lens, and R4 is the radius of curvature of the image-side surface of the second lens. More specifically, R3 and R4 may further satisfy: the absolute value of R3/R4 is more than or equal to 0.2 and less than or equal to 5. The requirement of | R3/R4| ≧ 0.1 is satisfied, which is beneficial to improving the resolution.
In an exemplary embodiment, an optical lens according to the present application may satisfy: and | F12/F | is less than or equal to 1 and less than or equal to 5, wherein F12 is the effective focal length of the first lens and the second lens which are cemented together to form the cemented lens, and F is the total effective focal length of the optical lens. More specifically, F12 and F further satisfy: the absolute value of F12/F is more than or equal to 2 and less than or equal to 3.5.
In an exemplary embodiment, an optical lens according to the present application may satisfy: 30 ≦ R72/F ≦ 0, where R72 is the radius of curvature of the image-side surface of the seventh lens and F is the total effective focal length of the optical lens. More specifically, R72 and F further satisfy: R72/F is 20. ltoreq. R72/F. ltoreq.0.
In an exemplary embodiment, an optical lens according to the present application may satisfy: d12/TTL is more than or equal to 0.06, wherein d12 is the distance between the center of the image side surface of the sixth lens and the center of the object side surface of the seventh 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, d12 and TTL further satisfy: d12/TTL is more than or equal to 0.07 and less than or equal to 0.12.
In an exemplary embodiment, a stop for limiting the light beam may be disposed between the second lens and the third lens to further improve the imaging quality of the optical lens. The diaphragm is arranged between the second lens and the third lens, so that the aperture of the diaphragm is increased, light rays entering the optical lens are effectively converged, and the aperture 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 second lens or in the vicinity of the object side surface of the third 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, the optical lens according to the present application may further include a filter and/or a protective glass disposed between the seventh lens and the imaging surface, as needed, to filter light rays having different wavelengths and prevent an image side element (e.g., a chip) of the optical lens from being damaged.
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 process in the lens manufacturing process.
In an exemplary embodiment, the first lens and the second lens may be cemented to form a cemented lens. The first lens and the second lens have opposite optical powers. For example, the first lens has a negative power, and the second lens has a positive power. The first lens with the concave object side surface and the concave image side surface is glued with the second lens with the convex object side surface and the convex image side surface, so that various aberrations of the optical system can be corrected, and the optical performances of improving the system resolution, optimizing distortion, CRA and the like on the premise of compact structure of the optical system are realized. Of course, the first lens and the second lens may not be cemented, which is advantageous for improving the resolution.
In an exemplary embodiment, the fourth lens and the fifth lens may be cemented to form a cemented lens. The fourth lens and the fifth lens have opposite optical powers. For example, the fourth lens has a positive power, and the fifth lens has a negative power. The fourth lens with the convex object side surface and the convex image side surface is glued with the fifth lens with the concave object side surface and the concave image side surface, so that various aberrations of the optical system can be corrected, and the optical performances of improving the resolution of the system, optimizing distortion, CRA and the like on the premise of compact structure of the optical system are realized.
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 the 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; further reducing the curvature of field and effectively correcting the off-axis point aberration of the optical lens. 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 first lens, the second lens, the fourth lens, the fifth lens, and the sixth lens may be spherical lenses. The third lens and the seventh lens may be aspheric lenses. 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, the sixth lens, and the seventh 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 application, through reasonable setting of the shapes and focal powers of the lenses, under the condition of only using 7 lenses, at least one beneficial effect that the optical system has small chromatic aberration, high resolution (more than eight million pixels can be achieved), miniaturization, small front end aperture, long back focus, good imaging quality and the like is achieved. Meanwhile, the optical system also meets the requirements of small lens size, low sensitivity and high production yield and low cost. The optical lens also has a smaller CRA, so that stray light generated by hitting a lens barrel when the rear end of light is emitted can be avoided, and the optical lens can be well matched with a vehicle-mounted chip, so that the optical lens cannot generate the phenomena of color cast, dark corners and the like. Meanwhile, the optical lens has good temperature adaptability, small imaging effect change in high and low temperature environments and stable image quality, and is beneficial to being used in most environments.
According to the optical lens of the embodiment of the application, the cemented lens is arranged, the whole chromatic aberration correction of the system is shared, the system aberration is corrected, the system resolution quality is improved, the matching sensitivity problem is reduced, the whole structure of the optical system is compact, and the miniaturization requirement is met.
In an exemplary embodiment, the first to seventh lenses in the optical lens may each be made of glass. 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 seventh 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 seventh 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.
However, it will be appreciated by those skilled in the art that the number of lenses constituting the lens barrel may be varied to achieve the various results and advantages described in the present specification without departing from the claimed subject matter. For example, although seven lenses are exemplified in the embodiment, the optical lens is not limited to include seven 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 includes, in order from an object side to an image side along an optical axis, 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, a sixth lens element L6, and a seventh lens element L7.
The first lens L1 is a biconcave lens with negative power, and has a concave object-side surface S1 and a concave image-side surface S2. The second lens L2 is a biconvex lens with positive power, and has a convex object-side surface S3 and a convex image-side surface S4. The third lens L3 is a biconvex lens with positive power, and has a convex object-side surface S6 and a convex image-side surface S7. The fourth lens element L4 is a biconvex lens with positive power, and has a convex object-side surface S8 and a convex image-side surface S9. The fifth lens L5 is a biconcave lens with negative power, and has a concave object-side surface S9 and a concave image-side surface S10. The sixth lens L6 is a convex-concave lens with positive refractive power, and has a convex object-side surface S11 and a concave image-side surface S12. The seventh lens L7 is a meniscus lens having positive refractive power, and has a concave object-side surface S13 and a convex image-side surface S14. 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 second lens L2 and the third lens L3 to improve image quality. For example, the stop STO may be disposed between the second lens L2 and the third lens L3 at a position close to the image side surface S4 of the second lens L2.
Optionally, the optical lens may further include a filter L8 and/or a protective glass L8 'having an object side S15 and an image side S16, the filter L8 may be used to correct color deviation and the protective glass L8' may be used to protect the image sensing chip IMA located at the imaging plane S17. The light from the object sequentially passes through the respective surfaces S1 to S16 and is finally imaged on the imaging surface S17.
Table 1 shows a radius of curvature R, a thickness d/a distance T (it is understood that the thickness d/the distance T of the row in which S1 is located is the center thickness d1 of the first lens L1, the thickness d/the distance T of the row in which S2 is located is the separation distance T12 between the first lens L1 and 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.
TABLE 1
In embodiment 1, the third lens L3 and the seventh lens L7 may be aspherical lenses, and the first lens L1, the second lens L2, the fourth lens L4, the fifth lens L5, and the sixth lens L6 may be spherical lenses. The profile x of each aspheric lens can be defined using, but not limited to, the following aspheric equation:
wherein x is the rise of the distance from the aspheric surface vertex to the aspheric surface vertex when the aspheric surface is at the position with the height of h along the optical axis direction; c is the paraxial curvature of the aspheric surface, c being 1/R (i.e., paraxial curvature c is the inverse of radius of curvature R in table 1 above); k is a conic coefficient; ai is the correction coefficient of the i-th order of the aspherical surface. Table 2 below gives the cone coefficients k and the high-order term coefficients A4, A6, A8, A10 and A12 which can be used for each of the aspherical mirror surfaces S6, S7, S13 and S14 in example 1.
Flour mark | k | A4 | A6 | A8 | A10 | A12 |
S6 | -1.9878 | 1.4228E-04 | -6.8534E-07 | -5.1627E-09 | 7.3492E-11 | -4.3865E-12 |
S7 | 34.7884 | 5.1762E-05 | -6.5034E-07 | 7.1452E-09 | -5.3844E-10 | 3.2641E-12 |
S13 | 52.3449 | -1.3447E-03 | -1.0865E-05 | -2.0565E-06 | 1.8774E-07 | -8.5979E-09 |
S14 | 99.0000 | -6.0594E-04 | -5.9453E-05 | 2.0882E-06 | -9.0917E-08 | 1.5430E-09 |
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 for the sake of brevity, a description of parts similar to those of embodiment 1 will be omitted. 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 includes, in order from an object side to an image side along an optical axis, 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, a sixth lens element L6, and a seventh lens element L7.
The first lens L1 is a biconcave lens with negative power, and has a concave object-side surface S1 and a concave image-side surface S2. The second lens L2 is a biconvex lens with positive power, and has a convex object-side surface S3 and a convex image-side surface S4. The third lens L3 is a biconvex lens with positive power, and has a convex object-side surface S6 and a convex image-side surface S7. The fourth lens element L4 is a biconvex lens with positive power, and has a convex object-side surface S8 and a convex image-side surface S9. The fifth lens L5 is a biconcave lens with negative power, and has a concave object-side surface S9 and a concave image-side surface S10. The sixth lens L6 is a convex-concave lens with positive refractive power, and has a convex object-side surface S11 and a concave image-side surface S12. The seventh lens L7 is a meniscus lens having positive refractive power, and has a concave object-side surface S13 and a convex image-side surface S14. The fourth lens L4 and the fifth lens L5 may be cemented to constitute a cemented lens. In the present embodiment, the first lens L1, the second lens L2, the fourth lens L4, the fifth lens L5, and the sixth lens L6 are spherical lenses, and the third lens L3 and the seventh lens L7 are aspherical lenses.
The optical lens may further include a stop STO, which may be disposed between the second lens L2 and the third lens L3 to improve image quality. For example, the stop STO may be disposed between the second lens L2 and the third lens L3 at a position close to the image side surface S4 of the second lens L2.
Optionally, the optical lens may further include a filter L8 and/or a protective glass L8 'having an object side S15 and an image side S16, the filter L8 may be used to correct color deviation and the protective glass L8' may be used to protect the image sensing chip IMA located at the imaging plane S17. The light from the object sequentially passes through the respective surfaces S1 to S16 and is finally imaged on the imaging surface S17.
Table 3 shows the radius of curvature R, thickness d/distance T, 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.
TABLE 3
Flour mark | k | A4 | A6 | A8 | A10 | A12 |
S6 | -2.0207 | 1.98E-04 | -9.55E-07 | -1.56E-08 | 2.88E-10 | -7.19E-12 |
S7 | 21.7135 | 3.28E-05 | -9.09E-07 | 7.14E-09 | -5.05E-10 | 3.09E-12 |
S13 | -99.0000 | -1.20E-03 | -1.62E-05 | -2.65E-06 | 1.35E-07 | -8.01E-09 |
S14 | -91.5985 | -6.47E-04 | -5.99E-05 | 2.08E-06 | -9.14E-08 | 1.09E-09 |
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 includes, in order from an object side to an image side along an optical axis, 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, a sixth lens element L6, and a seventh lens element L7.
The first lens L1 is a biconcave lens with negative power, and has a concave object-side surface S1 and a concave image-side surface S2. The second lens L2 is a biconvex lens with positive power, and has a convex object-side surface S3 and a convex image-side surface S4. The third lens L3 is a biconvex lens with positive power, and has a convex object-side surface S6 and a convex image-side surface S7. The fourth lens element L4 is a biconvex lens with positive power, and has a convex object-side surface S8 and a convex image-side surface S9. The fifth lens L5 is a biconcave lens with negative power, and has a concave object-side surface S9 and a concave image-side surface S10. The sixth lens L6 is a convex-concave lens with positive refractive power, and has a convex object-side surface S11 and a concave image-side surface S12. The seventh lens element L7 is a meniscus lens element with negative power, and has a concave object-side surface S13 and a convex image-side surface S14. The fourth lens L4 and the fifth lens L5 may be cemented to constitute a cemented lens. In the present embodiment, the first lens L1, the second lens L2, the fourth lens L4, the fifth lens L5, and the sixth lens L6 are spherical lenses, and the third lens L3 and the seventh lens L7 are aspherical lenses.
The optical lens may further include a stop STO, which may be disposed between the second lens L2 and the third lens L3 to improve image quality. For example, the stop STO may be disposed between the second lens L2 and the third lens L3 at a position close to the image side surface S4 of the second lens L2.
Optionally, the optical lens may further include a filter L8 and/or a protective glass L8 'having an object side S15 and an image side S16, the filter L8 may be used to correct color deviation and the protective glass L8' may be used to protect the image sensing chip IMA located at the imaging plane S17. The light from the object sequentially passes through the respective surfaces S1 to S16 and is finally imaged on the imaging surface S17.
Table 5 shows the radius of curvature R, thickness d/distance T, refractive index Nd, and abbe number Vd of each lens of the optical lens of example 3. Table 6 shows conic 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.
TABLE 5
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 includes, in order from an object side to an image side along an optical axis, 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, a sixth lens element L6, and a seventh lens element L7.
The first lens L1 is a biconcave lens with negative power, and has a concave object-side surface S1 and a concave image-side surface S2. The second lens L2 is a biconvex lens with positive power, and has a convex object-side surface S3 and a convex image-side surface S4. The third lens L3 is a biconvex lens with positive power, and has a convex object-side surface S6 and a convex image-side surface S7. The fourth lens element L4 is a biconvex lens with positive power, and has a convex object-side surface S8 and a convex image-side surface S9. The fifth lens L5 is a biconcave lens with negative power, and has a concave object-side surface S9 and a concave image-side surface S10. The sixth lens L6 is a convex-concave lens with positive refractive power, and has a convex object-side surface S11 and a concave image-side surface S12. The seventh lens element L7 is a meniscus lens element with negative power, and has a concave object-side surface S13 and a convex image-side surface S14. The fourth lens L4 and the fifth lens L5 may be cemented to constitute a cemented lens. In the present embodiment, the first lens L1, the second lens L2, the fourth lens L4, the fifth lens L5, and the sixth lens L6 are spherical lenses, and the third lens L3 and the seventh lens L7 are aspherical lenses.
The optical lens may further include a stop STO, which may be disposed between the second lens L2 and the third lens L3 to improve image quality. For example, the stop STO may be disposed between the second lens L2 and the third lens L3 at a position close to the image side surface S4 of the second lens L2.
Optionally, the optical lens may further include a filter L8 and/or a protective glass L8 'having an object side S15 and an image side S16, the filter L8 may be used to correct color deviation and the protective glass L8' may be used to protect the image sensing chip IMA located at the imaging plane S17. The light from the object sequentially passes through the respective surfaces S1 to S16 and is finally imaged on the imaging surface S17.
Table 7 shows the radius of curvature R, thickness d/distance T, 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.
TABLE 7
Flour mark | k | A4 | A6 | A8 | A10 | A12 |
S6 | -1.5490 | 1.05E-04 | -1.71E-08 | 2.28E-08 | -5.26E-10 | 7.96E-12 |
S7 | 40.8398 | 1.84E-04 | 3.19E-07 | 2.36E-08 | -5.05E-10 | 9.35E-12 |
S13 | 0.4539 | -1.86E-03 | -2.55E-05 | -1.58E-06 | 9.88E-08 | -6.98E-09 |
S14 | 99.0000 | -1.19E-03 | -5.89E-05 | 2.78E-06 | -9.92E-08 | 1.47E-09 |
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 includes, in order from an object side to an image side along an optical axis, 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, a sixth lens element L6, and a seventh lens element L7.
The first lens L1 is a biconcave lens with negative power, and has a concave object-side surface S1 and a concave image-side surface S2. The second lens L2 is a biconvex lens with positive power, and has a convex object-side surface S2 and a convex image-side surface S3. The third lens L3 is a biconvex lens with positive 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 power, and has a convex object-side surface S7 and a convex image-side surface S8. The fifth lens L5 is a biconcave lens with negative power, and has a concave object-side surface S8 and a concave image-side surface S9. The sixth lens L6 is a convex-concave lens with positive refractive power, and has a convex object-side surface S10 and a concave image-side surface S11. The seventh lens L7 is a biconcave lens with negative power, and has a concave object-side surface S12 and a concave image-side surface S13. The first lens L1 and the second lens L2 may be cemented to constitute a cemented lens. The fourth lens L4 and the fifth lens L5 may be cemented to constitute a cemented lens. In the present embodiment, the first lens L1, the second lens L2, the fourth lens L4, the fifth lens L5, and the sixth lens L6 are spherical lenses, and the third lens L3 and the seventh lens L7 are aspherical lenses.
The optical lens may further include a stop STO, which may be disposed between the second lens L2 and the third lens L3 to improve image quality. For example, the stop STO may be disposed between the second lens L2 and the third lens L3 at a position close to the object-side surface S5 of the third lens L3.
Optionally, the optical lens may further include a filter L8 and/or a protective glass L8 'having an object side S14 and an image side S15, the filter L8 may be used to correct color deviation and the protective glass L8' may be used to protect the image sensing chip IMA located at the imaging plane S16. The light from the object sequentially passes through the respective surfaces S1 to S15 and is finally imaged on the imaging surface S16.
Table 9 shows the radius of curvature R, thickness d/distance T, 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.
TABLE 9
Flour mark | k | A4 | A6 | A8 | A10 | A12 |
S5 | -2.4687 | 1.2124E-04 | -9.6455E-08 | -2.4333E-09 | 6.8684E-11 | -7.9943E-13 |
S6 | 10.7692 | 4.1433E-05 | -9.5534E-08 | -5.8223E-09 | 2.0000E-10 | -3.0300E-12 |
S12 | 32.2900 | -2.8962E-03 | 2.7198E-05 | 2.0000E-06 | -2.4710E-08 | -2.2180E-10 |
S13 | -29.1450 | -1.9700E-03 | 1.4328E-05 | 1.6718E-06 | -4.8000E-08 | 6.6122E-10 |
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 includes, in order from an object side to an image side along an optical axis, 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, a sixth lens element L6, and a seventh lens element L7.
The first lens L1 is a biconcave lens with negative power, and has a concave object-side surface S1 and a concave image-side surface S2. The second lens L2 is a biconvex lens with positive power, and has a convex object-side surface S2 and a convex image-side surface S3. The third lens L3 is a biconvex lens with positive 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 power, and has a convex object-side surface S7 and a convex image-side surface S8. The fifth lens L5 is a biconcave lens with negative power, and has a concave object-side surface S8 and a concave image-side surface S9. The sixth lens L6 is a convex-concave lens with positive refractive power, and has a convex object-side surface S10 and a concave image-side surface S11. The seventh lens L7 is a biconcave lens with negative power, and has a concave object-side surface S12 and a concave image-side surface S13. The first lens L1 and the second lens L2 may be cemented to constitute a cemented lens. The fourth lens L4 and the fifth lens L5 may be cemented to constitute a cemented lens. In the present embodiment, the first lens L1, the second lens L2, the fourth lens L4, the fifth lens L5, and the sixth lens L6 are spherical lenses, and the third lens L3 and the seventh lens L7 are aspherical lenses.
The optical lens may further include a stop STO, which may be disposed between the second lens L2 and the third lens L3 to improve image quality. For example, the stop STO may be disposed between the second lens L2 and the third lens L3 at a position close to the object-side surface S5 of the third lens L3.
Optionally, the optical lens may further include a filter L8 and/or a protective glass L8 'having an object side S14 and an image side S15, the filter L8 may be used to correct color deviation and the protective glass L8' may be used to protect the image sensing chip IMA located at the imaging plane S16. The light from the object sequentially passes through the respective surfaces S1 to S15 and is finally imaged on the imaging surface S16.
Table 11 shows the radius of curvature R, thickness d/distance T, 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.
TABLE 11
Flour mark | k | A4 | A6 | A8 | A10 | A12 |
S5 | -1.9858 | 1.66E-04 | -5.29E-09 | -2.93E-09 | 1.14E-10 | -5.57E-13 |
S6 | 2.5408 | 4.57E-05 | 1.08E-07 | -4.81E-09 | 8.05E-11 | -2.94E-13 |
S12 | 38.7348 | -2.29E-03 | 3.48E-06 | 9.84E-07 | -4.56E-08 | 5.72E-10 |
S13 | 10.2836 | -1.96E-03 | 1.63E-06 | 8.17E-07 | -4.69E-08 | 4.60E-10 |
TABLE 12
In summary, examples 1 to 6 each satisfy the relationship shown in table 13 below. In table 13, TTL, BFL, F, D, H, F1, F2, F12, F4, F5, F45, R1, R3, R4 are in units of millimeters (mm), and FOV is in units of degrees (°).
Conditional expression (A) example | Example 1 | Example 2 | Example 3 | Example 4 | Example 5 | Example 6 |
TTL | 30.0600 | 30.0000 | 30.2900 | 30.0000 | 31.5500 | 30.0000 |
BFL | 3.0500 | 3.0500 | 3.0500 | 3.0500 | 2.8500 | 3.1600 |
F | 15.1000 | 15.2000 | 15.0900 | 15.2000 | 15.0200 | 15.2000 |
D | 11.6600 | 11.6140 | 11.4800 | 11.3760 | 12.2600 | 11.9200 |
H | 8.0680 | 8.0700 | 8.0680 | 8.0640 | 8.0760 | 8.0660 |
FOV | 30.0000 | 30.0000 | 30.0000 | 30.0000 | 30.0000 | 30.0000 |
F1 | -13.9600 | -14.3750 | -13.8700 | -14.0770 | -15.2800 | -15.1000 |
F2 | 16.5200 | 16.9500 | 17.5200 | 17.6080 | 24.9400 | 26.2700 |
F12 | / | / | / | / | -38.2700 | -45.2900 |
F4 | 13.0700 | 17.5930 | 12.8000 | 13.0420 | 13.6900 | 13.7300 |
F5 | -6.9400 | -7.16049 | -7.1800 | -7.0752 | -7.7300 | -7.3596 |
F45 | -21.7300 | -20.7420 | -24.0700 | -22.0300 | -28.2400 | -23.4800 |
TTL/F | 1.9907 | 1.9737 | 2.0073 | 1.9737 | 2.1005 | 1.9737 |
BFL/TTL | 0.1015 | 0.1017 | 0.1007 | 0.1017 | 0.0903 | 0.1053 |
D/H/FOV | 0.0482 | 0.0480 | 0.0474 | 0.0470 | 0.0506 | 0.0493 |
|F/R1| | 1.0574 | 1.0803 | 1.0479 | 1.0638 | 0.8687 | 0.9470 |
(FOV×F)/H | 56.1477 | 56.5056 | 56.1106 | 56.5476 | 55.7949 | 56.5336 |
TTL/H/FOV | 0.1242 | 0.1239 | 0.1251 | 0.1240 | 0.1302 | 0.1240 |
|F4/F5| | 1.8833 | 2.4570 | 1.7827 | 1.8433 | 1.7710 | 1.8656 |
Vd3+Vd4 | 148.9100 | 148.9100 | 148.9100 | 148.9100 | 145.0200 | 145.0200 |
|F1/F| | 0.9245 | 0.9457 | 0.9192 | 0.9261 | 1.0173 | 0.9934 |
|F1/F2| | 0.8450 | 0.8481 | 0.7917 | 0.7995 | 0.6127 | 0.5748 |
|(R3-R4)/(R3+R4)| | 20.2832 | 57.4909 | 6.3250 | 7.2873 | 1.5565 | 1.5250 |
|F45/F| | 1.4391 | 1.3646 | 1.5951 | 1.4493 | 1.8802 | 1.5447 |
|R1/R2| | 0.6409 | 0.5559 | 0.6400 | 0.6254 | 0.7949 | 0.7031 |
|R3/R4| | 0.9060 | 0.9658 | 0.7270 | 0.7587 | 0.2177 | 0.2079 |
d12/TTL | 0.0714 | 0.0708 | 0.0938 | 0.0925 | 0.1001 | 0.1099 |
R72/F | -16.5566 | -11.9617 | -19.1246 | -13.1579 | / | / |
|F12/F| | / | / | / | / | 2.5479 | 2.9796 |
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. Furthermore, the electronic device may also be a stand-alone imaging device such as a vehicle-mounted camera, or may be an imaging module integrated on a driving assistance system such as a car.
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. The optical lens assembly, in order from an object side to an image side along an optical axis, comprises:
the first lens with negative focal power, the object side surface of the first lens is a concave surface, and the image side surface of the first lens is a concave surface;
the second lens with positive focal power has a convex object-side surface and a convex image-side surface;
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;
the fourth lens with positive focal power has a convex object-side surface and a convex image-side surface;
a fifth lens element with negative refractive power, the object-side surface of which is concave and the image-side surface of which is concave;
a sixth lens element with positive refractive power having a convex object-side surface and a concave image-side surface; and
a seventh lens having optical power.
2. An optical lens barrel according to claim 1, wherein the seventh lens element has a positive optical power, and has a concave object-side surface and a convex image-side surface.
3. An optical lens barrel according to claim 1, wherein the seventh lens element has a negative power, and has a concave object-side surface and a convex image-side surface.
4. An optical lens barrel according to claim 1, wherein the seventh lens element has a negative power, and has a concave object-side surface and a concave image-side surface.
5. An optical lens according to claim 1, characterized in that the third lens and the seventh lens each have an aspherical mirror surface.
6. An optical lens according to claim 1, wherein the fourth lens and the fifth lens are cemented to form a cemented lens.
7. An optical lens according to claim 1, wherein the first lens and the second lens are cemented to form a cemented lens.
8. An optical lens barrel according to any one of claims 1 to 7, wherein 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 satisfy: TTL/F is less than or equal to 5.5.
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 positive optical power;
a third lens having a positive optical power;
a fourth lens having a positive optical power;
a fifth lens having a negative optical power;
a sixth lens having positive optical power; and
a seventh lens having optical power;
the fourth lens and the fifth lens are glued to form a glued lens; and
a distance d12 between the center of the image-side surface of the sixth lens element and the center of the object-side surface of the seventh lens element on the optical axis, and a distance TTL between the center of the object-side surface of the first lens element and the optical axis of the imaging surface of the optical lens satisfy: d12/TTL is more than or equal to 0.06.
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.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202010857110.5A CN114089500B (en) | 2020-08-24 | 2020-08-24 | Optical lens and electronic device |
CN202410824240.7A CN118642251A (en) | 2020-08-24 | 2020-08-24 | Optical lens and electronic device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202010857110.5A CN114089500B (en) | 2020-08-24 | 2020-08-24 | Optical lens and electronic device |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN202410824240.7A Division CN118642251A (en) | 2020-08-24 | 2020-08-24 | Optical lens and electronic device |
Publications (2)
Publication Number | Publication Date |
---|---|
CN114089500A true CN114089500A (en) | 2022-02-25 |
CN114089500B CN114089500B (en) | 2024-08-27 |
Family
ID=80295513
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN202410824240.7A Pending CN118642251A (en) | 2020-08-24 | 2020-08-24 | Optical lens and electronic device |
CN202010857110.5A Active CN114089500B (en) | 2020-08-24 | 2020-08-24 | Optical lens and electronic device |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN202410824240.7A Pending CN118642251A (en) | 2020-08-24 | 2020-08-24 | Optical lens and electronic device |
Country Status (1)
Country | Link |
---|---|
CN (2) | CN118642251A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN115291370A (en) * | 2022-09-28 | 2022-11-04 | 江西联创电子有限公司 | Optical lens |
CN115407489A (en) * | 2022-09-19 | 2022-11-29 | 福建福光天瞳光学有限公司 | Large-aperture large-target-surface long-focus optical lens and imaging method thereof |
WO2024067253A1 (en) * | 2022-09-28 | 2024-04-04 | 江西联创电子有限公司 | Optical lens |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102866484A (en) * | 2011-07-07 | 2013-01-09 | 佳能企业股份有限公司 | Zoom lens |
CN105487211A (en) * | 2016-01-07 | 2016-04-13 | 东莞市宇瞳光学科技股份有限公司 | Large-aperture, large-image surface ultra-wide angle zoom lens |
JP2017116913A (en) * | 2015-12-24 | 2017-06-29 | エーエーシー テクノロジーズ ピーティーイー リミテッドAac Technologies Pte.Ltd. | Image capturing optical system |
CN110824676A (en) * | 2019-12-24 | 2020-02-21 | 浙江舜宇光学有限公司 | Optical imaging lens |
CN111158109A (en) * | 2020-02-18 | 2020-05-15 | 浙江舜宇光学有限公司 | Optical imaging lens |
-
2020
- 2020-08-24 CN CN202410824240.7A patent/CN118642251A/en active Pending
- 2020-08-24 CN CN202010857110.5A patent/CN114089500B/en active Active
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102866484A (en) * | 2011-07-07 | 2013-01-09 | 佳能企业股份有限公司 | Zoom lens |
JP2017116913A (en) * | 2015-12-24 | 2017-06-29 | エーエーシー テクノロジーズ ピーティーイー リミテッドAac Technologies Pte.Ltd. | Image capturing optical system |
CN105487211A (en) * | 2016-01-07 | 2016-04-13 | 东莞市宇瞳光学科技股份有限公司 | Large-aperture, large-image surface ultra-wide angle zoom lens |
CN110824676A (en) * | 2019-12-24 | 2020-02-21 | 浙江舜宇光学有限公司 | Optical imaging lens |
CN111158109A (en) * | 2020-02-18 | 2020-05-15 | 浙江舜宇光学有限公司 | Optical imaging lens |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN115407489A (en) * | 2022-09-19 | 2022-11-29 | 福建福光天瞳光学有限公司 | Large-aperture large-target-surface long-focus optical lens and imaging method thereof |
CN115291370A (en) * | 2022-09-28 | 2022-11-04 | 江西联创电子有限公司 | Optical lens |
CN115291370B (en) * | 2022-09-28 | 2023-02-07 | 江西联创电子有限公司 | Optical lens |
WO2024067253A1 (en) * | 2022-09-28 | 2024-04-04 | 江西联创电子有限公司 | Optical lens |
Also Published As
Publication number | Publication date |
---|---|
CN118642251A (en) | 2024-09-13 |
CN114089500B (en) | 2024-08-27 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN111830672B (en) | Optical lens and imaging apparatus | |
CN114089500B (en) | Optical lens and electronic device | |
CN114063247A (en) | Optical lens and electronic device | |
CN114509859A (en) | Optical lens and electronic device | |
CN111239962B (en) | Optical lens and imaging apparatus | |
CN114384665B (en) | Optical lens and electronic device | |
CN114594568A (en) | Optical lens and electronic device | |
CN112014945B (en) | Optical lens and imaging apparatus | |
CN111198429B (en) | Optical lens and imaging apparatus | |
CN112987230A (en) | Optical lens and electronic device | |
CN113759496B (en) | Optical lens and electronic device | |
CN114488467B (en) | Optical lens and electronic device | |
CN114488468B (en) | Optical lens and electronic device | |
CN113805305B (en) | Optical lens and electronic device | |
CN112987231B (en) | Optical lens and electronic device | |
CN112444941B (en) | Optical lens and electronic device | |
CN114690368A (en) | Optical lens and electronic device | |
CN114442260A (en) | Optical lens and electronic device | |
CN115047585A (en) | Optical lens and electronic device | |
CN114384666A (en) | Optical lens and electronic device | |
CN114428385A (en) | Optical lens and electronic device | |
CN114442258A (en) | Optical lens and electronic device | |
CN114442259B (en) | Optical lens and electronic device | |
CN114280756B (en) | Optical lens and electronic device | |
CN114721121B (en) | Optical lens and electronic device |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PB01 | Publication | ||
PB01 | Publication | ||
SE01 | Entry into force of request for substantive examination | ||
SE01 | Entry into force of request for substantive examination | ||
GR01 | Patent grant | ||
GR01 | Patent grant |