CN112748512B - Optical lens and electronic device - Google Patents

Abstract

The application discloses an optical lens and electronic equipment comprising the same. The optical lens sequentially comprises the first lens from an object side to an image side along an optical axis, wherein the first lens has negative focal power, the object side surface of the first lens is a convex surface, and the image side surface of the first lens is a concave surface; the second lens has optical power; the third lens has optical power, and the image side surface of the third lens is a convex surface; the fourth lens has positive focal power, 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 fifth lens has optical power; and the sixth lens has optical power. The optical lens can realize at least one of the beneficial effects of small caliber, miniaturization, low cost, small aperture value, small CRA, good temperature applicability and the like.

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 device.

Background

With the rapid development of automobile auxiliary driving systems in recent years, the application of optical lenses to automobiles is becoming more and more widespread. In the specific application process, on one hand, the market requires the vehicle-mounted optical lens to be continuously miniaturized so as to be convenient for installation and use of the lens; on the other hand, the on-vehicle optical lens is required to have high performance stability in a large temperature difference environment, so that the automobile auxiliary driving system is suitable for an application environment with large temperature variation.

Disclosure of Invention

An aspect of the present application provides an optical lens sequentially including, from an object side to an image side along an optical axis: the lens system comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens, wherein the first lens has negative focal power, the object side surface of the first lens is a convex surface, and the image side surface of the first lens is a concave surface; the second lens has optical power; the third lens has optical power, and the image side surface of the third lens is a convex surface; the fourth lens has positive focal power, 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 fifth lens has optical power; and the sixth lens has optical power.

In one embodiment, the object side surface of the second lens is convex, and the image side surface is concave.

In one embodiment, the object side surface of the second lens is convex, and the image side surface is convex.

In one embodiment, the object side surface of the second lens is concave, and the image side surface is convex.

In one embodiment, the object side surface of the third lens is convex.

In one embodiment, the object side surface of the third lens is concave.

In one embodiment, the object side surface of the fifth lens element is convex, and the image side surface is convex.

In one embodiment, the object side surface of the fifth lens element is convex, and the image side surface is concave.

In one embodiment, the object side surface of the fifth lens element is concave, and the image side surface is concave.

In one embodiment, the object side surface of the sixth lens element is convex, and the image side surface is convex.

In one embodiment, the object side surface of the sixth lens element is convex, and the image side surface is concave.

In one embodiment, the object side surface of the sixth lens element is concave, and the image side surface is concave.

In one embodiment, the second lens and the third lens are cemented to form a cemented lens.

In one embodiment, the fifth lens and the sixth lens are cemented to form a cemented lens.

In one embodiment, the first lens and the fourth lens are both aspherical lenses.

In one embodiment, the total effective focal length F of the optical lens and the entrance pupil diameter ENPD of the optical lens satisfy: F/ENPD is more than or equal to 0.7 and less than or equal to 1.4.

In one embodiment, a distance TTL between an object side surface center of the first lens and an imaging surface center 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.

In one embodiment, a distance TTL between an object side surface center of the first lens and an imaging surface center of the optical lens on the optical axis, a maximum field angle FOV of the optical lens, and an image height H corresponding to the maximum field angle FOV satisfy: TTL/H/FOV is less than or equal to 0.06.

In one embodiment, a maximum field angle FOV of the optical lens, a maximum light passing aperture D of an object side surface of the first lens corresponding to the maximum field angle FOV, and an image height H corresponding to the maximum field angle FOV satisfy: D/H/FOV is less than or equal to 0.03.

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 FOV satisfy: (FOV. Times.F)/H.gtoreq.60.

In one embodiment, the thermal coefficient DO of the material used to make the third lens satisfies: |d0|= 1.0700E-005.

In one embodiment, a distance d2 between the first lens and the diaphragm on the optical axis and a distance TTL between an object side surface center of the first lens and an imaging surface center of the optical lens on the optical axis satisfy: d2/TTL is more than or equal to 0.05.

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 satisfy: R5/R6 is more than or equal to 0.2 and less than or equal to 2.2.

In one embodiment, the Sg value Sag (S2) corresponding to the maximum aperture of the image side surface of the first lens and the Sg value Sag (S1) corresponding to the maximum aperture of the object side surface of the first lens satisfy: sag (S2)/Sag (S1) | is not less than 1.5.

In one embodiment, the Sg value Sag (S7) corresponding to the maximum aperture of the object side surface of the fourth lens element and the Sg value Sag (S8) corresponding to the maximum aperture of the image side surface of the fourth lens element satisfy: the content of Sag (S7)/Sag (S8) is more than or equal to 0.1 and less than or equal to 1.5.

In one embodiment, a maximum distance dn between any two adjacent lenses of the second lens and the sixth lens on the optical axis and a distance TTL between an object side surface center of the first lens and an imaging surface center of the optical lens on the optical axis satisfy: dn/TTL is less than or equal to 0.20.

Another aspect of the present application provides an optical lens sequentially including, from an object side to an image side along an optical axis: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens, the first lens having negative optical power; the second lens has optical power; the third lens has optical power; the fourth lens has positive focal power; the fifth lens has optical power; and the sixth lens has optical power; wherein, the total effective focal length F of the optical lens and the entrance pupil diameter ENPD of the optical lens satisfy: F/ENPD is more than or equal to 0.7 and less than or equal to 1.4.

In one embodiment, the object side surface of the first lens is convex, and the image side surface is concave.

In one embodiment, the object side surface of the second lens is convex, and the image side surface is concave.

In one embodiment, the object side surface of the second lens is convex, and the image side surface is convex.

In one embodiment, the object side surface of the second lens is concave, and the image side surface is convex.

In one embodiment, the object side surface of the third lens element is convex, and the image side surface is convex.

In one embodiment, the object side surface of the third lens element is concave, and the image side surface is convex.

In one embodiment, the fourth lens element has a convex object-side surface and a convex image-side surface.

In one embodiment, the object side surface of the fifth lens element is convex, and the image side surface is convex.

In one embodiment, the object side surface of the fifth lens element is convex, and the image side surface is concave.

In one embodiment, the object side surface of the fifth lens element is concave, and the image side surface is concave.

In one embodiment, the object side surface of the sixth lens element is convex, and the image side surface is convex.

In one embodiment, the object side surface of the sixth lens element is convex, and the image side surface is concave.

In one embodiment, the object side surface of the sixth lens element is concave, and the image side surface is concave.

In one embodiment, the second lens and the third lens are cemented to form a cemented lens.

In one embodiment, the fifth lens and the sixth lens are cemented to form a cemented lens.

In one embodiment, the first lens and the fourth lens are both aspherical lenses.

In one embodiment, a distance TTL between an object side surface center of the first lens and an imaging surface center 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.

In one embodiment, a distance TTL between an object side surface center of the first lens and an imaging surface center of the optical lens on the optical axis, a maximum field angle FOV of the optical lens, and an image height H corresponding to the maximum field angle FOV satisfy: TTL/H/FOV is less than or equal to 0.06.

In one embodiment, a maximum field angle FOV of the optical lens, a maximum light passing aperture D of an object side surface of the first lens corresponding to the maximum field angle FOV, and an image height H corresponding to the maximum field angle FOV satisfy: D/H/FOV is less than or equal to 0.03.

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 FOV satisfy: (FOV. Times.F)/H.gtoreq.60.

In one embodiment, the thermal coefficient DO of the material used to make the third lens satisfies: |d0|= 1.0700E-005.

In one embodiment, the optical lens further comprises a diaphragm, the diaphragm is located between the first lens and the second lens, and a distance d2 between the first lens and the diaphragm on the optical axis and a distance TTL between an object side surface center of the first lens and an imaging surface center of the optical lens on the optical axis are as follows: d2/TTL is more than or equal to 0.05.

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 satisfy: R5/R6 is more than or equal to 0.2 and less than or equal to 2.2.

In one embodiment, the Sg value Sag (S2) corresponding to the maximum aperture of the image side surface of the first lens and the Sg value Sag (S1) corresponding to the maximum aperture of the object side surface of the first lens satisfy: sag (S2)/Sag (S1) | is not less than 1.5.

In one embodiment, the Sg value Sag (S7) corresponding to the maximum aperture of the object side surface of the fourth lens element and the Sg value Sag (S8) corresponding to the maximum aperture of the image side surface of the fourth lens element satisfy: the content of Sag (S7)/Sag (S8) is more than or equal to 0.1 and less than or equal to 1.5.

In one embodiment, a maximum distance dn between any two adjacent lenses of the second lens and the sixth lens on the optical axis and a distance TTL between an object side surface of the first lens and an imaging surface of the optical lens on the optical axis satisfy: dn/TTL is less than or equal to 0.20.

The six lenses are adopted, and the shape, the focal power and the like of each lens are optimally arranged, so that the optical lens has at least one beneficial effect of larger relative aperture, higher relative illuminance, large image surface with large angle, small distortion, high resolution, miniaturization, small CRA and the like.

Drawings

Other features, objects and advantages of the present application will become more apparent from the following detailed description of non-limiting embodiments, taken in conjunction with the accompanying drawings. In the drawings:

fig. 1 is a schematic diagram showing the structure of an optical lens according to embodiment 1 of the present application;

fig. 2 is a schematic diagram showing the structure of an optical lens according to embodiment 2 of the present application;

fig. 3 is a schematic diagram showing the structure of an optical lens according to embodiment 3 of the present application;

fig. 4 is a schematic diagram showing the structure of an optical lens according to embodiment 4 of the present application;

fig. 5 is a schematic view showing the structure of an optical lens according to embodiment 5 of the present application;

Fig. 6 is a schematic diagram showing the structure of an optical lens according to embodiment 6 of the present application;

fig. 7 is a schematic view showing the structure of an optical lens according to embodiment 7 of the present application; and

fig. 8 is a schematic diagram showing the structure of an optical lens according to embodiment 8 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 these detailed description are merely illustrative of exemplary embodiments of the application and are not intended to limit the scope of the 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 the present specification, the expressions of first, second, third, etc. are only used to distinguish one feature from another feature, and do not represent any limitation on the feature. Accordingly, a first lens discussed below may also be referred to as a second lens or a third lens without departing from the teachings of the present application.

In the drawings, the thickness, size, and shape of the lenses have been slightly exaggerated for convenience of explanation. In particular, the spherical or aspherical shape shown in the drawings is shown by way of example. That is, the shape of the spherical or aspherical surface is not limited to the shape of the spherical or aspherical surface shown in the drawings. The figures are merely examples and are 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, then 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 subject is referred to as the object side of the lens, and the surface of each lens closest to the imaging side is referred to as the image side of the lens.

It will be further understood that the terms "comprises," "comprising," "includes," "including," "having," "containing," 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. Furthermore, when a statement such as "at least one of the following" appears after a list of features that are listed, the entire listed feature is modified instead of modifying a separate element in the list. Furthermore, when describing embodiments of the present application, use of "may" means "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, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other. The present application will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

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 power, 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 in order from the object side to the image side along the optical axis.

In an exemplary embodiment, the optical lens may further include a photosensitive element disposed at the imaging surface. Alternatively, the photosensitive element provided to the imaging surface may be a photosensitive coupling element (CCD) or a complementary metal oxide semiconductor element (CMOS).

The first lens may have negative power and have a meniscus shape, an object-side surface thereof may be convex, and an image-side surface thereof may be concave. The focal power and the surface type configuration of the first lens are beneficial to collecting incident light rays with a large field angle, and ensuring that as many light rays as possible stably enter the rear optical system, so that the luminous flux is increased, and the imaging quality is improved. In practical application, the vehicle-mounted lens is generally exposed in an external environment, and the meniscus lens protruding to the object side is favorable for enabling rain and snow to slide along the lens, so that the service life of the lens is prolonged.

The second lens element may have positive refractive power or negative refractive power, wherein the object-side surface thereof may be convex, while the image-side surface thereof is concave, or both the object-side surface and the image-side surface thereof may be convex, or while the object-side surface thereof is concave.

The third lens element may have positive or negative refractive power, and may have both object-side and image-side surfaces thereof being convex, or may have both object-side and image-side surfaces thereof being concave.

The fourth lens element may have positive refractive power, and both the object-side surface and the image-side surface thereof may be convex. The focal power and the surface shape of the fourth lens are favorable for converging light, and the light trend is adjusted so as to make the light trend transition smoothly.

The fifth lens element may have positive refractive power or negative refractive power, wherein the object-side surface thereof may be convex, the image-side surface thereof may be concave, or both the object-side surface and the image-side surface thereof may be convex, or both the object-side surface and the image-side surface thereof may be concave.

The sixth lens element may have positive or negative refractive power, wherein the object-side surface thereof may be convex, the image-side surface thereof may be concave, or both the object-side surface and the image-side surface thereof may be convex, or both the object-side surface and the image-side surface thereof may be concave.

In an exemplary embodiment, a stop for limiting the light beam may be provided between the first lens and the second lens to further improve the imaging quality of the optical lens. The diaphragm is beneficial to effectively converging light rays entering the optical system, shortening the overall length of the system and reducing the caliber of the lens. In the present embodiment, the diaphragm may be disposed in the vicinity of the object side surface of the second lens. It should be noted, however, that the locations of the diaphragms disclosed herein are merely examples and not limiting; in alternative embodiments, the diaphragm may be arranged in other positions as desired.

In an exemplary embodiment, the optical lens according to the present application may further include a filter disposed between the sixth lens and the imaging plane to filter light rays having different wavelengths, as needed. The optical lens according to the present application may further include a protective glass disposed between the sixth lens and the imaging plane to prevent internal elements (e.g., chips) of the optical lens from being damaged.

As known to those skilled in the art, cemented lenses may be used to minimize chromatic aberration or eliminate chromatic aberration. The use of the cemented lens in the optical lens can improve the image quality and reduce the reflection loss of light energy, thereby 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 second lens and the third lens are cemented to form a cemented lens. The second lens with the concave object side surface and the third lens with the convex object side surface are glued; the second lens with the convex object side and the convex image side are glued with the third lens with the concave object side and the convex image side; and the second lens with the concave object-side surface and the convex image-side surface is glued with the third lens with the concave object-side surface and the convex image-side surface. In this embodiment, the second lens is made of a low abbe number material and the third lens is made of a high abbe number material. The second lens and the third lens are matched, so that system chromatic aberration can be eliminated.

In an exemplary embodiment, the fifth lens and the sixth lens are cemented to form a cemented lens. The object side surface is a convex surface, and the image side surface is a concave surface, and the fifth lens element and the sixth lens element are glued; the fifth lens with the convex object side and the convex image side are glued with the sixth lens with the concave object side and the concave image side; and the fifth lens with concave object side and image side and the sixth lens with convex object side and image side are glued. The fifth lens with positive focal power is arranged in front, and the sixth lens with negative focal power is arranged behind the fifth lens, so that light passing through the fourth lens can be smoothly transited to the sixth lens, and the overall length of the optical system and the size of the rear end port of the lens are reduced. In this embodiment, the fifth lens is made of a high abbe number material, and the sixth lens is made of a low abbe number material. The fifth lens and the sixth lens are matched, so that chromatic aberration of the system can be eliminated. The adoption of the gluing mode between the lenses has at least one of the following advantages: reducing self chromatic aberration, reducing tolerance sensitivity, and balancing the overall chromatic aberration of the system through residual partial chromatic aberration; reducing the air separation between the two lenses, thereby reducing the overall length of the system; the assembly parts between the lenses are reduced, so that the working procedures are reduced, and the cost is lowered; the tolerance sensitivity problems of the lens unit, such as inclination/core deflection and the like, generated in the assembly process are reduced, and the production yield is improved; the light quantity loss caused by reflection among lenses is reduced, and the illumination is improved; further reduces field curvature and effectively corrects off-axis aberrations of the optical lens. The gluing design shares the whole chromatic aberration correction of the system, effectively corrects the aberration, improves the resolution, ensures that the whole optical system is compact, and meets the miniaturization requirement.

In an exemplary embodiment, the total effective focal length F of the optical lens and the entrance pupil diameter ENPD of the optical lens satisfy: F/ENPD is 0.7.ltoreq.1.4, for example 0.8.ltoreq.F/ENPD is 1.3. The proportional relation between the total effective focal length of the optical lens and the entrance pupil diameter of the optical lens is reasonably set, so that the optical system is facilitated to collect more incident light rays.

In an exemplary embodiment, the distance TTL on the optical axis from the object side center of the first lens to the imaging plane center of the optical lens satisfies with the total effective focal length F of the optical lens: TTL/F is 5 or less, e.g., TTL/F is 4.8 or less. In this application, the distance between the object side surface of the first lens and the imaging surface of the optical lens on the optical axis is also referred to as the total length of the optical lens. The proportional relation between the total length and the total effective focal length of the optical lens is reasonably controlled, so that the optical lens has better performance, and miniaturization of the lens is realized.

In an exemplary embodiment, the distance TTL on the optical axis from the object side surface center of the first lens to the imaging surface center of the optical lens, the maximum field angle FOV of the optical lens, and the image height H corresponding to the maximum field angle FOV satisfy: TTL/H/FOV is less than or equal to 0.06, e.g., TTL/H/FOV is less than or equal to 0.05. The mutual relation among the three is reasonably arranged, which is beneficial to realizing miniaturization of the lens.

In an exemplary embodiment, the maximum field angle FOV of the optical lens, the maximum light passing aperture D of the object side surface of the first lens corresponding to the maximum field angle FOV, and the image height H corresponding to the maximum field angle FOV satisfy: D/H/FOV is less than or equal to 0.03, for example, D/H/FOV is less than or equal to 0.02. The interrelation among the three is reasonably arranged, so that the front end caliber of the optical lens is easy to be reduced, and the miniaturization is realized.

In an exemplary 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 FOV satisfy: (FOV X F)/H.gtoreq.60, for example, (FOV X F)/H.gtoreq.65. The mutual relation of the three is reasonably arranged, so that the optical lens has the characteristics of large field angle and long focus, and the balance design of the large field angle and the long focus is realized.

In an exemplary embodiment, the thermal coefficient DO of the material from which the third lens is made satisfies: |d0|= 1.0700E-005. The third lens is made of high-thermal coefficient materials, and is beneficial to realizing system thermal compensation.

In an exemplary embodiment, the optical lens further includes a diaphragm, the diaphragm is located between the first lens and the second lens, and a distance d2 between the first lens and the diaphragm on the optical axis and a distance TTL between an object side surface center of the first lens and an imaging surface center of the optical lens on the optical axis satisfy: d2/TTL.gtoreq.0.05, e.g., d 2/TTL.gtoreq.0.08. The proportional relation between the spacing distance between the first lens and the diaphragm on the optical axis and the distance between the object side surface of the first lens and the imaging surface of the optical lens on the optical axis is reasonably set, so that the center distance between the adjacent lenses is larger, smooth transition of light rays near the diaphragm is realized, and the image quality of an optical system is improved.

In an exemplary embodiment, the first lens may be made of a high refractive index material. For example, the refractive index Nd1 of the first lens satisfies: nd 1. Gtoreq.1.65, for example Nd 1. Gtoreq.1.68. This choice of material for the first lens is advantageous in reducing the front aperture of the optical system and improving the imaging quality of the optical system.

In an exemplary 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 satisfy: 0.2.ltoreq.R5/R6.ltoreq.2.2, e.g. 0.4.ltoreq.R5/R6.ltoreq.2.0. The proportional relation between the curvature radius of the object side surface of the third lens and the curvature radius of the image side surface of the third lens is reasonably set, so that the curvature radii of the object side surface and the image side surface of the lens are similar, light can smoothly enter the optical system, and the system resolution quality is improved.

In an exemplary embodiment, the Sg value Sag (S2) corresponding to the maximum aperture of the image side surface of the first lens and the Sg value Sag (S1) corresponding to the maximum aperture of the object side surface of the first lens satisfy: sag (S2)/Sag (S1) |1.5, e.g., sag (S2)/Sag (S1) |1.8. And the proportional relation between the Sg value corresponding to the maximum light transmission caliber of the image side surface of the first lens and the Sg value corresponding to the maximum light transmission caliber of the object side surface of the first lens is reasonably set, so that the object side surface of the first lens is gentle, the image side surface is curved, the incident light in the optical system is favorably compressed, the smaller aperture value is realized, and the caliber of the optical system is reduced.

In an exemplary embodiment, the Sg value Sag (S7) corresponding to the maximum aperture of the object side surface of the fourth lens element and the Sg value Sag (S8) corresponding to the maximum aperture of the image side surface of the fourth lens element satisfy: 0.1.ltoreq.Sag (S7)/Sag (S8) |.ltoreq.1.5, for example,

the content of Sag (S7)/Sag (S8) is more than or equal to 0.2 and less than or equal to 1.2. And the proportional relation between the Sg value corresponding to the maximum light transmission caliber of the object side surface of the fourth lens and the Sg value corresponding to the maximum light transmission caliber of the image side surface of the fourth lens is reasonably set, so that the shape of the object side surface and the image side surface of the fourth lens is close to each other, the smooth transition of peripheral light is realized, and the sensitivity of the lens is reduced.

In an exemplary embodiment, the maximum pitch value dn in the pitches on the optical axis of any two adjacent lenses of the second lens to the sixth lens and the distance TTL on the optical axis from the object side surface center of the first lens to the imaging surface center of the optical lens satisfy: dn/TTL is less than or equal to 0.20, for example, dn/TTL is less than or equal to 0.15. And the proportional relation between the maximum distance value in the distance between any two adjacent lenses from the second lens to the sixth lens on the optical axis and the distance between the object side surface of the first lens and the imaging surface of the optical lens on the optical axis is reasonably set, so that the distance between the lenses is reduced, and the miniaturization of the lens is facilitated.

In an exemplary embodiment, the effective focal length F1 of the first lens and the total effective focal length F of the optical lens satisfy: the I F1/F I is not less than 5.0, for example, the I F1/F I is not less than 3.0. The proportional relation between the effective focal length of the first lens and the total effective focal length of the optical lens is reasonably set, so that more light rays can smoothly enter the optical system, and the illuminance of the system is increased.

In an exemplary embodiment, the effective focal length F4 of the fourth lens and the total effective focal length F of the optical lens satisfy: the I F4/F I is not less than 1.0, for example, the I F4/F I is not less than 1.2. The proportional relation between the effective focal length of the fourth lens and the total effective focal length of the optical lens is reasonably set, so that balance of various aberrations in the optical system can be realized.

In an exemplary embodiment, the first lens and the fourth lens are both aspherical lenses. The aspherical 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 a better radius of curvature characteristic, and has advantages of improving distortion aberration and improving astigmatic aberration. After the aspheric lens is adopted, aberration generated during imaging can be eliminated as much as possible, and therefore imaging quality of the lens is improved. The arrangement of the aspheric lens is helpful for correcting system aberration and improving resolution. In this embodiment, the first lens and the fourth lens are aspheric lenses, which is beneficial to improving the resolution quality of the optical system.

According to the optical lens of the embodiment of the application, through reasonable arrangement of the shape and the focal power of each lens, the spherical surface and the aspherical surface are reasonably matched, so that miniaturization of the lens and convenience in assembly are realized, and meanwhile, the resolution quality and the thermal stability of the system are improved. Meanwhile, due to the arrangement of the plurality of cemented lenses, the aberration of the system is favorably corrected, the resolution of the system is improved, the overall structure of the optical system is also favorably compact, the miniaturization of the lens is realized, the tolerance sensitivity of the lens is reduced, and the lens is convenient to assemble.

The optical lens according to the above embodiment of the present application realizes a smaller aperture at the front end of the lens by controlling the shape of the first lens on the basis of satisfying a small aperture value (0.7 to 1); meanwhile, a diaphragm is arranged between the first lens and the second lens, so that the caliber of the front end of the lens is further reduced; the lens of the application only uses 6 lenses, reduces the cost of the lens, simultaneously greatly reduces the length of the lens, realizes miniaturization of the lens, and is convenient for realizing assembly in a limited space in some special fields. The optical lens can adopt an all-glass design, has a wide working temperature range, is suitable for working environments of-40 to 105 degrees, and has stable optical performance.

However, those skilled in the art will appreciate that the number of lenses making up a lens barrel may be varied to achieve the various results and advantages described in the specification without departing from the technical solutions claimed herein. For example, although six lenses are described as an example in the embodiment, the optical lens is not limited to including six lenses. The optical lens may also include other numbers of lenses, if desired.

Specific examples of the optical lens applicable to the above-described embodiments are further described below with reference to the accompanying 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 configuration 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 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 element L1 has a meniscus lens element with negative refractive power, a convex object-side surface S1 and a concave image-side surface S2. The second lens L2 is a meniscus lens with negative focal power, and its object-side surface S4 is a convex surface and its image-side surface S5 is a concave surface. The third lens element L3 has a convex object-side surface S5 and a convex image-side surface S6. The fourth lens element L4 has a convex object-side surface S7 and a convex image-side surface S8. The fifth lens element L5 has a positive refractive power, and has a convex object-side surface S9 and a concave image-side surface S10. The sixth lens element L6 has a negative refractive power, and has a convex object-side surface S10 and a concave image-side surface S11. The second lens L2 and the third lens L3 may be cemented to form a cemented lens, and the fifth lens L5 and the sixth lens L6 may be cemented to form a cemented lens.

The optical lens may further include a stop STO, which may be disposed between the first lens L1 and the second lens L2 to improve imaging quality. For example, the stop STO may be disposed near the object side surface S4 of the second lens L2.

In the present embodiment, both the object side surface and the image side surface of the first lens L1 and the fourth lens L4 may be aspherical.

Optionally, the optical lens may further include a filter L6 and/or a protective glass L6 'having an object side surface S12 and an image side surface S13, the filter L6 may be used to correct color deviation and the protective glass L6' may be used to protect the image sensing chip IMA located at the image plane S14. Light from the object sequentially passes through the respective surfaces S1 to S13 and is finally imaged on the imaging surface S14.

Table 1 shows the radius of curvature R, thickness T (it is understood that the thickness T in the line of S1 is the center thickness of the first lens L1, the thickness T in the line of S2 is the air gap d12 between the first lens L1 and the second lens L2, and so on), refractive index Nd, and abbe number Vd of each lens of the optical lens of embodiment 1.

TABLE 1

In this embodiment, six lenses are taken as an example, and at least one of the beneficial effects of high resolution, miniaturization, small front end caliber, small CRA, good temperature performance and the like can be achieved by reasonably distributing the focal power and the surface shape of each lens, the center thickness of each lens and the air interval between each lens. Each aspherical surface profile Z is defined by the following formula:

Wherein Z is the distance vector height from the vertex of the aspheric surface when the aspheric surface is at the position with the height 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 the conic coefficient conic; A. b, C, D, E are all high order coefficients. Table 2 below shows the conic coefficients K and the higher order coefficients A, B, C, D and E that can be used for the aspherical lens surfaces S1, S2, S7, and S8 in example 1.

Face number

K

A

B

C

D

E

S1

-0.1105

-1.7006E-03

-7.9418E-05

5.8422E-06

-1.9136E-07

2.4441E-09

S2

-1.0173

-7.0452E-04

-2.7725E-04

3.5730E-05

-1.9718E-06

4.2993E-08

S7

-3.3111

-1.4297E-05

4.5378E-06

-2.6610E-07

5.8481E-09

-4.9431E-11

S8

-0.6647

1.8976E-04

-4.7289E-07

-5.5798E-08

1.6570E-09

-1.7312E-11

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 portions similar to embodiment 1 will be omitted for brevity. Fig. 2 shows a schematic structural view 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 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 element L1 has a meniscus lens element with negative refractive power, a convex object-side surface S1 and a concave image-side surface S2. The second lens L2 is a meniscus lens with negative focal power, and its object-side surface S4 is a convex surface and its image-side surface S5 is a concave surface. The third lens element L3 has a convex object-side surface S5 and a convex image-side surface S6. The fourth lens element L4 has a convex object-side surface S7 and a convex image-side surface S8. The fifth lens element L5 has a positive refractive power, and has a convex object-side surface S9 and a concave image-side surface S10. The sixth lens element L6 has a negative refractive power, and has a convex object-side surface S10 and a concave image-side surface S11. The second lens L2 and the third lens L3 may be cemented to form a cemented lens, and the fifth lens L5 and the sixth lens L6 may be cemented to form a cemented lens.

The optical lens may further include a stop STO, which may be disposed between the first lens L1 and the second lens L2 to improve imaging quality. For example, the stop STO may be disposed near the object side surface S4 of the second lens L2.

In the present embodiment, both the object side surface and the image side surface of the first lens L1 and the fourth lens L4 may be aspherical.

Optionally, the optical lens may further include a filter L6 and/or a protective glass L6 'having an object side surface S12 and an image side surface S13, the filter L6 may be used to correct color deviation and the protective glass L6' may be used to protect the image sensing chip IMA located at the image plane S14. Light from the object sequentially passes through the respective surfaces S1 to S13 and is finally imaged on the imaging surface S14.

Table 3 shows the radius of curvature R, thickness T, refractive index Nd, and abbe number Vd of each lens of the optical lens of example 2.

TABLE 3 Table 3

The cone coefficients K and the higher order coefficients A, B, C, D and E that can be used for the aspherical lens surfaces S1, S2, S7 and S8 in example 2 are given in table 4 below.

Face number

K

A

B

C

D

E

S1

-0.1575

-1.7460E-03

-7.9321E-05

5.9049E-06

-1.8746E-07

2.2570E-09

S2

-1.0227

-7.6343E-04

-2.7826E-04

3.5976E-05

-1.9817E-06

4.1847E-08

S7

-7.0210

-1.4241E-05

4.8728E-06

-2.7213E-07

5.5754E-09

-4.6724E-11

S8

-0.6590

1.8906E-04

-6.9159E-07

-5.7158E-08

1.6170E-09

-1.7270E-11

TABLE 4 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 view 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 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 element L1 has a meniscus lens element with negative refractive power, a convex 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 S4 and a convex image-side surface S5. The third lens element L3 has a meniscus lens element with negative refractive power, a concave object-side surface S5 and a convex image-side surface S6. The fourth lens element L4 has a convex object-side surface S7 and a convex image-side surface S8. The fifth lens element L5 has a negative meniscus lens element with a convex object-side surface S9 and a concave image-side surface S10. The sixth lens element L6 has a positive refractive power, and has a convex object-side surface S10 and a concave image-side surface S11. The second lens L2 and the third lens L3 may be cemented to form a cemented lens, and the fifth lens L5 and the sixth lens L6 may be cemented to form a cemented lens.

The optical lens may further include a stop STO, which may be disposed between the first lens L1 and the second lens L2 to improve imaging quality. For example, the stop STO may be disposed near the object side surface S4 of the second lens L2.

In the present embodiment, both the object side surface and the image side surface of the first lens L1 and the fourth lens L4 may be aspherical.

Optionally, the optical lens may further include a filter L6 and/or a protective glass L6 'having an object side surface S12 and an image side surface S13, the filter L6 may be used to correct color deviation and the protective glass L6' may be used to protect the image sensing chip IMA located at the image plane S14. Light from the object sequentially passes through the respective surfaces S1 to S13 and is finally imaged on the imaging surface S14.

Table 5 shows the radius of curvature R, thickness T, refractive index Nd, and abbe number Vd of each lens of the optical lens of example 3.

TABLE 5

The cone coefficients K and the higher order coefficients A, B, C, D and E that can be used for the aspherical lens surfaces S1, S2, S7 and S8 in example 3 are given in table 6 below.

Face number

K

A

B

C

D

E

S1

-0.2047

-1.7815E-03

-7.6123E-05

5.6754E-06

-1.9392E-07

2.4525E-09

S2

-1.0298

-7.8590E-04

-2.6638E-04

3.4508E-05

-2.1459E-06

4.8063E-08

S7

-4.0502

-3.4756E-05

5.5327E-06

-2.4490E-07

5.9439E-09

-3.9213E-11

S8

-0.7778

2.0490E-04

-2.2848E-07

-4.5990E-08

2.0881E-09

-8.7881E-12

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 view 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 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 element L1 has a meniscus lens element with negative refractive power, a convex 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 S4 and a convex image-side surface S5. The third lens element L3 has a meniscus lens element with negative refractive power, a concave object-side surface S5 and a convex image-side surface S6. The fourth lens element L4 has a convex object-side surface S7 and a convex image-side surface S8. The fifth lens element L5 has a negative meniscus lens element with a convex object-side surface S9 and a concave image-side surface S10. The sixth lens element L6 has a positive refractive power, and has a convex object-side surface S10 and a concave image-side surface S11. The second lens L2 and the third lens L3 may be cemented to form a cemented lens, and the fifth lens L5 and the sixth lens L6 may be cemented to form a cemented lens.

The optical lens may further include a stop STO, which may be disposed between the first lens L1 and the second lens L2 to improve imaging quality. For example, the stop STO may be disposed near the object side surface S4 of the second lens L2.

In the present embodiment, both the object side surface and the image side surface of the first lens L1 and the fourth lens L4 may be aspherical.

Optionally, the optical lens may further include a filter L6 and/or a protective glass L6 'having an object side surface S12 and an image side surface S13, the filter L6 may be used to correct color deviation and the protective glass L6' may be used to protect the image sensing chip IMA located at the image plane S14. Light from the object sequentially passes through the respective surfaces S1 to S13 and is finally imaged on the imaging surface S14.

Table 7 shows the radius of curvature R, thickness T, refractive index Nd, and abbe number Vd of each lens of the optical lens of example 4.

TABLE 7

The cone coefficients K and the higher order coefficients A, B, C, D and E that can be used for the aspherical lens surfaces S1, S2, S7 and S8 in example 4 are given in table 8 below.

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 view 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 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 element L1 has a meniscus lens element with negative refractive power, a convex object-side surface S1 and a concave image-side surface S2. The second lens element L2 has a positive refractive power, a concave object-side surface S4 and a convex image-side surface S5. The third lens element L3 has a positive refractive power, a concave object-side surface S5 and a convex image-side surface S6. The fourth lens element L4 has a convex object-side surface S7 and a convex image-side surface S8. The fifth lens element L5 has a convex object-side surface S9 and a convex image-side surface S10, respectively, and has positive optical power. The sixth lens element L6 has a concave object-side surface S10 and a concave image-side surface S11, and has a negative refractive power. The second lens L2 and the third lens L3 may be cemented to form a cemented lens, and the fifth lens L5 and the sixth lens L6 may be cemented to form a cemented lens.

The optical lens may further include a stop STO, which may be disposed between the first lens L1 and the second lens L2 to improve imaging quality. For example, the stop STO may be disposed near the object side surface S4 of the second lens L2.

In the present embodiment, both the object side surface and the image side surface of the first lens L1 and the fourth lens L4 may be aspherical.

Optionally, the optical lens may further include a filter L6 and/or a protective glass L6 'having an object side surface S12 and an image side surface S13, the filter L6 may be used to correct color deviation and the protective glass L6' may be used to protect the image sensing chip IMA located at the image plane S14. Light from the object sequentially passes through the respective surfaces S1 to S13 and is finally imaged on the imaging surface S14.

Table 9 shows the radius of curvature R, thickness T, refractive index Nd, and abbe number Vd of each lens of the optical lens of example 5.

TABLE 9

The cone coefficients K and the higher order coefficients A, B, C, D and E that can be used for the aspherical lens surfaces S1, S2, S7 and S8 in example 5 are given in table 10 below.

Face number

K

A

B

C

D

E

S1

-0.0652

-1.9532E-03

-3.0025E-05

3.8083E-06

-1.5498E-07

2.3202E-09

S2

-1.1337

-5.7562E-04

-9.9774E-05

1.9221E-05

-1.2666E-06

3.3408E-08

S7

-2.8488

-8.4408E-05

2.7806E-06

-1.8869E-07

4.7784E-09

-5.2055E-11

S8

-0.3712

1.5508E-04

1.0032E-06

-8.4644E-08

2.2335E-09

-2.5747E-11

Table 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 view 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 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 element L1 has a meniscus lens element with negative refractive power, a convex object-side surface S1 and a concave image-side surface S2. The second lens element L2 has a positive refractive power, a concave object-side surface S4 and a convex image-side surface S5. The third lens element L3 has a positive refractive power, a concave object-side surface S5 and a convex image-side surface S6. The fourth lens element L4 has a convex object-side surface S7 and a convex image-side surface S8. The fifth lens element L5 has a convex object-side surface S9 and a convex image-side surface S10, respectively, and has positive optical power. The sixth lens element L6 has a concave object-side surface S10 and a concave image-side surface S11, and has a negative refractive power. The second lens L2 and the third lens L3 may be cemented to form a cemented lens, and the fifth lens L5 and the sixth lens L6 may be cemented to form a cemented lens.

The optical lens may further include a stop STO, which may be disposed between the first lens L1 and the second lens L2 to improve imaging quality. For example, the stop STO may be disposed near the object side surface S4 of the second lens L2.

In the present embodiment, both the object side surface and the image side surface of the first lens L1 and the fourth lens L4 may be aspherical.

Optionally, the optical lens may further include a filter L6 and/or a protective glass L6 'having an object side surface S12 and an image side surface S13, the filter L6 may be used to correct color deviation and the protective glass L6' may be used to protect the image sensing chip IMA located at the image plane S14. Light from the object sequentially passes through the respective surfaces S1 to S13 and is finally imaged on the imaging surface S14.

Table 11 shows the radius of curvature R, thickness T, refractive index Nd, and abbe number Vd of each lens of the optical lens of example 6.

TABLE 11

The cone coefficients K and the higher order coefficients A, B, C, D and E that can be used for the aspherical lens surfaces S1, S2, S7 and S8 in example 6 are given in table 12 below.

Face number

K

A

B

C

D

E

S1

-0.5174

-2.6287E-03

-5.7757E-05

6.1209E-06

-2.2029E-07

3.0385E-09

S2

-1.3230

-1.1225E-03

-1.6955E-04

2.5029E-05

-1.3793E-06

2.9314E-08

S7

-2.8224

-9.3832E-05

1.7075E-06

-1.9459E-07

5.2386E-09

-6.2626E-11

S8

-0.1281

3.1803E-05

1.3623E-06

-8.2986E-08

1.8879E-09

-2.0211E-11

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 view of an optical lens according to embodiment 7 of the present application.

As shown in fig. 7, the optical lens includes, in order from an object side to an image side along an optical axis, 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 element L1 has a meniscus lens element with negative refractive power, a convex object-side surface S1 and a concave image-side surface S2. The second lens element L2 has a positive refractive power, a concave object-side surface S4 and a convex image-side surface S5. The third lens element L3 has a positive refractive power, a concave object-side surface S5 and a convex image-side surface S6. The fourth lens element L4 has a convex object-side surface S7 and a convex image-side surface S8. The fifth lens element L5 has a concave object-side surface S9 and a concave image-side surface S10, respectively, and has a negative refractive power. The sixth lens element L6 has a convex object-side surface S10 and a convex image-side surface S11, respectively, and has positive optical power. The second lens L2 and the third lens L3 may be cemented to form a cemented lens, and the fifth lens L5 and the sixth lens L6 may be cemented to form a cemented lens.

The optical lens may further include a stop STO, which may be disposed between the first lens L1 and the second lens L2 to improve imaging quality. For example, the stop STO may be disposed near the object side surface S4 of the second lens L2.

In the present embodiment, both the object side surface and the image side surface of the first lens L1 and the fourth lens L4 may be aspherical.

Optionally, the optical lens may further include a filter L6 and/or a protective glass L6 'having an object side surface S12 and an image side surface S13, the filter L6 may be used to correct color deviation and the protective glass L6' may be used to protect the image sensing chip IMA located at the image plane S14. Light from the object sequentially passes through the respective surfaces S1 to S13 and is finally imaged on the imaging surface S14.

Table 13 shows the radius of curvature R, thickness T, refractive index Nd, and abbe number Vd of each lens of the optical lens of example 7.

TABLE 13

The cone coefficients K and the higher order coefficients A, B, C, D and E that can be used for the aspherical lens surfaces S1, S2, S7 and S8 in example 7 are given in table 14 below.

Face number

K

A

B

C

D

E

S1

-3.3327

-1.9806E-03

-1.1775E-05

3.7185E-06

-1.3433E-07

1.6216E-09

S2

-1.3419

-1.4010E-03

-3.0192E-05

1.3701E-05

-7.7303E-07

1.5117E-08

S7

-2.2432

-1.5126E-04

2.3594E-06

-1.6431E-07

4.2917E-09

-4.5853E-11

S8

-0.4871

1.6796E-04

5.4689E-07

-9.6676E-08

2.6400E-09

-2.7853E-11

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 view of an optical lens according to embodiment 8 of the present application.

As shown in fig. 8, the optical lens includes, in order from an object side to an image side along an optical axis, 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 element L1 has a meniscus lens element with negative refractive power, a convex object-side surface S1 and a concave image-side surface S2. The second lens element L2 has a positive refractive power, a concave object-side surface S4 and a convex image-side surface S5. The third lens element L3 has a positive refractive power, a concave object-side surface S5 and a convex image-side surface S6. The fourth lens element L4 has a convex object-side surface S7 and a convex image-side surface S8. The fifth lens element L5 has a concave object-side surface S9 and a concave image-side surface S10, respectively, and has a negative refractive power. The sixth lens element L6 has a convex object-side surface S10 and a convex image-side surface S11, respectively, and has positive optical power. The second lens L2 and the third lens L3 may be cemented to form a cemented lens, and the fifth lens L5 and the sixth lens L6 may be cemented to form a cemented lens.

The optical lens may further include a stop STO, which may be disposed between the first lens L1 and the second lens L2 to improve imaging quality. For example, the stop STO may be disposed near the object side surface S4 of the second lens L2.

In the present embodiment, both the object side surface and the image side surface of the first lens L1 and the fourth lens L4 may be aspherical.

Optionally, the optical lens may further include a filter L6 and/or a protective glass L6 'having an object side surface S12 and an image side surface S13, the filter L6 may be used to correct color deviation and the protective glass L6' may be used to protect the image sensing chip IMA located at the image plane S14. Light from the object sequentially passes through the respective surfaces S1 to S13 and is finally imaged on the imaging surface S14.

Table 15 shows the radius of curvature R, thickness T, refractive index Nd, and abbe number Vd of each lens of the optical lens of example 8.

TABLE 15

The cone coefficients K and the higher order coefficients A, B, C, D and E that can be used for the aspherical lens surfaces S1, S2, S7 and S8 in example 8 are given in table 16 below.

Face number

K

A

B

C

D

E

S1

-3.0841

-2.0328E-03

-1.1593E-05

3.7408E-06

-1.3549E-07

1.6436E-09

S2

-1.3480

-1.3572E-03

-2.9460E-05

1.3387E-05

-7.5236E-07

1.4745E-08

S7

-2.1170

-1.4810E-04

2.4020E-06

-1.6424E-07

4.2877E-09

-4.5413E-11

S8

-0.4974

1.7382E-04

5.3617E-07

-9.6082E-08

2.6555E-09

-2.8044E-11

Table 16

In summary, examples 1 to 8 each satisfy the relationship shown in table 17 below. In table 17, TTL, EPD, H, F, F, F4, D, R, R6, d2, d6, d8, d11 are in millimeters (mm) and FOV is in degrees (°).

TABLE 17

The application also provides an electronic device, which can comprise the optical lens and the imaging element for converting an optical image formed by the optical lens into an electric signal. The electronic device may be a stand-alone electronic device such as a detection range camera or may be an imaging module integrated with such a detection range device. The electronic device may also be a stand-alone imaging device, such as an onboard camera, or an imaging module integrated on, for example, a driving assistance system.

The foregoing description is only of the preferred embodiments of the present application and is presented as a description of the principles of the technology being utilized. It will be appreciated by persons skilled in the art that the scope of the invention referred to in this application is not limited to the specific combinations of features described above, but it is intended to cover other embodiments in which any combination of features described above or equivalents thereof is possible without departing from the spirit of the invention. Such as the above-described features and technical features having similar functions (but not limited to) disclosed in the present application are replaced with each other.

Claims (46)

1. An optical lens sequentially includes, from an object side to an image side along an optical axis: first lens, second lens, third lens, fourth lens, fifth lens and sixth lens, its characterized in that:

The first lens has negative focal power, the object side surface of the first lens is a convex surface, and the image side surface of the first lens is a concave surface;

the second lens has optical power;

the third lens has optical power, and the image side surface of the third lens is a convex surface;

the fourth lens has positive focal power, 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 fifth lens has optical power;

the sixth lens has optical power;

the number of lenses with focal power in the optical lens is six;

the focal power of the second lens and the third lens is negative positive, positive or negative or positive respectively;

the fifth lens and the sixth lens have different optical powers with positive and negative properties; and

the optical lens satisfies the following conditions: (FOV x F)/H is more than or equal to 60 degrees, TTL/F is less than or equal to 5, TTL/H/FOV is less than or equal to 180 degrees and is less than or equal to 10.8 and 0.2 is less than or equal to |R5/R6| is less than or equal to 2.2, wherein FOV is the maximum field angle of view of the optical lens, F is the total effective focal length of the optical lens, H is the image height corresponding to the maximum field angle, TTL is the distance on the optical axis from the center of the object side of the first lens to the center of the imaging surface of the optical lens, R5 is the radius of curvature of the object side of the third lens, and R6 is the radius of curvature of the image side of the third lens.

2. The optical lens of claim 1, wherein the second lens element has a convex object-side surface and a concave image-side surface.

3. The optical lens of claim 1, wherein the second lens element has a convex object-side surface and a convex image-side surface.

4. The optical lens of claim 1, wherein the second lens element has a concave object-side surface and a convex image-side surface.

5. The optical lens of claim 1, wherein the object side surface of the third lens is convex.

6. The optical lens of claim 1, wherein the object-side surface of the third lens is concave.

7. The optical lens of claim 1, wherein the fifth lens element has a convex object-side surface and a convex image-side surface.

8. The optical lens of claim 1, wherein the fifth lens element has a convex object-side surface and a concave image-side surface.

9. The optical lens of claim 1, wherein the fifth lens element has a concave object-side surface and a concave image-side surface.

10. The optical lens of claim 1, wherein the sixth lens element has a convex object-side surface and a convex image-side surface.

11. The optical lens of claim 1, wherein the sixth lens element has a convex object-side surface and a concave image-side surface.

12. The optical lens of claim 1, wherein the sixth lens element has a concave object-side surface and a concave image-side surface.

13. The optical lens of claim 1, wherein the second lens and the third lens are cemented to form a cemented lens.

14. The optical lens of claim 1, wherein the fifth lens and the sixth lens are cemented to form a cemented lens.

15. The optical lens of claim 1, wherein the first lens and the fourth lens are both aspherical lenses.

16. The optical lens according to any one of claims 1-15, wherein the total effective focal length F of the optical lens and the entrance pupil diameter ENPD of the optical lens satisfy:

0.7≤F/ENPD≤1.4。

17. the optical lens according to any one of claims 1 to 15, wherein a maximum field angle FOV of the optical lens, a maximum light passing aperture D of an object side surface of the first lens corresponding to the maximum field angle FOV, and an image height H corresponding to the maximum field angle FOV satisfy:

D/H/FOV×180°≤5.4。

18. The optical lens according to any one of claims 1 to 15, wherein the thermal coefficient DO of the material from which the third lens is made satisfies:

|D0|＝1.0700E-005。

19. the optical lens according to any one of claims 1 to 15, wherein a distance d2 between the first lens and a stop in the optical lens on the optical axis and a distance TTL between an object side surface center of the first lens and an imaging surface center of the optical lens on the optical axis satisfy:

d2/TTL≥0.05。

20. the optical lens system according to any one of claims 1-15, wherein a Sg value Sag (S2) corresponding to a maximum light transmission aperture of an image side surface of the first lens and a Sg value Sag (S1) corresponding to a maximum light transmission aperture of an object side surface of the first lens satisfy:

|Sag(S2)/Sag(S1)|≥1.5。

21. the optical lens system according to any one of claims 1-15, wherein a Sg value Sag (S7) corresponding to a maximum aperture of an object side surface of the fourth lens element and a Sg value Sag (S8) corresponding to a maximum aperture of an image side surface of the fourth lens element satisfy:

0.1≤|Sag(S7)/Sag(S8)|≤1.5。

22. the optical lens according to any one of claims 1 to 15, wherein a maximum distance value dn in a distance between any two adjacent lenses of the second lens to the sixth lens on the optical axis and a distance TTL between an object side surface of the first lens and an imaging surface of the optical lens on the optical axis satisfy:

dn/TTL≤0.20。

23. An optical lens sequentially includes, from an object side to an image side along an optical axis: first lens, second lens, third lens, fourth lens, fifth lens and sixth lens, its characterized in that:

the first lens has negative optical power;

the second lens has optical power;

the third lens has optical power;

the fourth lens has positive focal power;

the fifth lens has optical power;

the sixth lens has optical power;

the number of lenses with focal power in the optical lens is six;

the focal power of the second lens and the third lens is negative positive, positive or negative or positive respectively;

the fifth lens and the sixth lens have different optical powers with positive and negative properties; and

the optical lens satisfies the following conditions: F/ENPD is more than or equal to 0.7 and less than or equal to 1.4, (FOV×F)/H is more than or equal to 60 degrees, TTL/F is less than or equal to 5, TTL/H/FOV is more than or equal to 180 degrees and less than or equal to 10.8 and 0.2 is less than or equal to |R5/R6| is less than or equal to 2.2, wherein FOV is the maximum field angle of the optical lens, F is the total effective focal length of the optical lens, H is the image height corresponding to the maximum field angle, TTL is the distance from the center of the object side surface of the first lens to the center of the imaging surface of the optical lens on the optical axis, ENPD is the entrance pupil diameter of the optical lens, 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.

24. The optical lens of claim 23, wherein the first lens element has a convex object-side surface and a concave image-side surface.

25. The optical lens of claim 23, wherein the second lens element has a convex object-side surface and a concave image-side surface.

26. The optical lens of claim 23, wherein the second lens element has a convex object-side surface and a convex image-side surface.

27. The optical lens of claim 23, wherein the second lens element has a concave object-side surface and a convex image-side surface.

28. The optical lens of claim 23, wherein the third lens element has a convex object-side surface and a convex image-side surface.

29. The optical lens of claim 23, wherein the third lens element has a concave object-side surface and a convex image-side surface.

30. The optical lens of claim 23, wherein the fourth lens element has a convex object-side surface and a convex image-side surface.

31. The optical lens of claim 23, wherein the fifth lens element has a convex object-side surface and a convex image-side surface.

32. The optical lens of claim 23, wherein the fifth lens element has a convex object-side surface and a concave image-side surface.

33. The optical lens of claim 23, wherein the fifth lens element has a concave object-side surface and a concave image-side surface.

34. The optical lens of claim 23, wherein the sixth lens element has a convex object-side surface and a convex image-side surface.

35. The optical lens of claim 23, wherein the sixth lens element has a convex object-side surface and a concave image-side surface.

36. The optical lens of claim 23, wherein the sixth lens element has a concave object-side surface and a concave image-side surface.

37. The optical lens of claim 23, wherein the second lens and the third lens are cemented to form a cemented lens.

38. The optical lens of claim 23, wherein the fifth lens and the sixth lens are cemented to form a cemented lens.

39. The optical lens of claim 23, wherein the first lens and the fourth lens are each aspheric lenses.

40. The optical lens of any of claims 23-39 wherein a maximum field angle FOV of the optical lens, a maximum light passing aperture D of an object side surface of the first lens corresponding to the maximum field angle FOV, and an image height H corresponding to the maximum field angle FOV satisfy:

D/H/FOV×180°≤5.4。

41. the optical lens of any of claims 23-39 wherein the material used to make the third lens has a thermal coefficient DO that satisfies:

|D0|＝1.0700E-005。

42. the optical lens system of any of claims 23-39 wherein a distance d2 between the first lens and a stop in the optical lens system on the optical axis and a distance TTL between an object side center of the first lens and an imaging plane center of the optical lens system on the optical axis satisfy:

d2/TTL≥0.05。

43. the optical lens system according to any one of claims 23-39, wherein a Sg value Sag (S2) corresponding to a maximum aperture of an image side surface of the first lens and a Sg value Sag (S1) corresponding to a maximum aperture of an object side surface of the first lens satisfy:

|Sag(S2)/Sag(S1)|≥1.5。

44. the optical lens system according to any one of claims 23-39, wherein a Sg value Sag (S7) corresponding to a maximum aperture of an object side surface of the fourth lens element and a Sg value Sag (S8) corresponding to a maximum aperture of an image side surface of the fourth lens element satisfy:

0.1≤|Sag(S7)/Sag(S8)|≤1.5。

45. The optical lens system of any one of claims 23-39, wherein a maximum distance dn between any two adjacent lenses of the second lens to the sixth lens on the optical axis and a distance TTL between an object side surface center of the first lens and an imaging surface center of the optical lens on the optical axis satisfy:

dn/TTL≤0.20。

46. an electronic device comprising the optical lens according to claim 1 or 23 and an imaging element for converting an optical image formed by the optical lens into an electric signal.