CN108508572B - Optical lens - Google Patents
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- CN108508572B CN108508572B CN201710112475.3A CN201710112475A CN108508572B CN 108508572 B CN108508572 B CN 108508572B CN 201710112475 A CN201710112475 A CN 201710112475A CN 108508572 B CN108508572 B CN 108508572B
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- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
- G02B13/0015—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design
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Abstract
The optical lens comprises a first lens, a second lens and a third lens, wherein the first lens has 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; a second lens element; a third lens element; a fourth lens element; and a fifth lens. The first lens, the second lens, the third lens, the fourth lens and the fifth lens are sequentially arranged from the object side to the image side, so that an optical lens with high image resolution, small caliber and large image pickup range is formed, and the requirement on miniaturization can be met.
Description
Technical Field
The invention relates to an optical lens.
Background
The optical imaging system generally receives imaging light reflected by an imaging object through an optical imaging lens to collect the imaging light, and light collected by the optical imaging lens is subjected to sensitization through a sensitization chip, so that image collection of the object is realized. With the development of science and technology, the requirements for the resolving power of the lens are higher and higher, and the requirements for the lens in different fields are different, for example, the vehicle-mounted lens applied to the automobile field has stricter requirements for the resolving power compared with the common industry application due to the fact that the vehicle-mounted lens relates to traffic safety. That is, the resolution of the lens group of the on-vehicle lens is required to be high.
On the other hand, due to the special application environment of the vehicle-mounted camera, the road condition and environment information needs to be provided, and the larger the camera shooting range is, the more the provided road condition information is, and the driving safety is utilized. Therefore, the demand for the on-vehicle lens is increasing not only for the resolution but also for the imaging range of the lens. And the image of the center needs to be amplified as much as possible while the shooting range is increased, the resolution of the center is improved, and the information of the front vehicle is more accurately identified.
On the other hand, with the development of technology, the volume of the vehicle-mounted lens is also required to be smaller and smaller. In particular, the front view lens of the vehicle type, may be mounted on the inner side of the windshield, with a risk of interference with the windshield, and therefore, is more required to be small.
Disclosure of Invention
An object of the present invention is to provide an optical lens which increases distortion by setting a lens shape so that a larger range of image information is obtained with the same chip size.
An object of the present invention is to provide an optical lens assembly, wherein the first lens element is a biconcave lens element, which increases distortion, and the central image of the image plane is sharp and the peripheral image is distorted and compressed, thereby increasing the range of the image.
An object of the present invention is to provide an optical lens, wherein the optical lens can be applied to a vehicle-mounted lens by a user, and a distorted image around the optical lens is corrected by software to obtain a clear image information with a larger range.
An object of the present invention is to provide an optical lens, wherein the first lens is a biconcave lens, which is beneficial to collecting more light rays and improving the imaging quality.
An object of the present invention is to provide an optical lens, wherein the optical lens increases an image capturing range and improves a resolution of a center.
An object of the present invention is to provide an optical lens, wherein the optical lens has a high resolution, so that the image is clear, and the risk of software misjudgment is reduced.
An object of the present invention is to provide an optical lens, wherein the optical lens has a small aperture, reducing the risk of interference with a front windshield, and reducing the size of an imaging system.
An object of the present invention is to provide an optical lens, wherein the optical lens is suitably applied to a vehicle-mounted front view lens.
To achieve at least one of the above objects, an aspect of the present invention provides an optical lens, including: the first lens has 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; a second lens having a positive optical power; a third lens having a negative optical power; a fourth lens having a positive optical power; and the fifth lens has positive focal power, and the first lens, the second lens, the third lens, the fourth lens and the fifth lens are sequentially arranged from the object side to the image side.
According to some embodiments, in the optical lens system, the object-side surface of the second lens element is convex, and the image-side surface of the second lens element is convex.
According to some embodiments, in the optical lens system, the object-side surface of the third lens element is concave, and the image-side surface of the third lens element is concave.
According to some embodiments, in the optical lens assembly, an image-side surface of the fourth lens element is a convex surface.
According to some embodiments, in the optical lens assembly, an object-side surface of the fifth lens element is a convex surface, and an image-side surface of the fifth lens element is a convex surface.
According to some embodiments, the optical lens system further comprises a fourth lens element having a convex object-side surface.
According to some embodiments, the optical lens system further includes a fourth lens element having a concave object-side surface.
According to some embodiments, the optical lens, wherein a maximum field angle FOV of the optical lens, an image height h corresponding to the maximum field angle, and a whole set of focal lengths F of the optical lens satisfy: the FOV multiplied by F/h is more than or equal to 55 and less than or equal to 75.
According to some embodiments, the optical lens, wherein TTL of the optical lens and the entire set of focal length values F of the optical lens satisfy: TTL/F is less than or equal to 4.
According to some embodiments, the optical lens, wherein a maximum field angle FOV of the optical lens, a maximum clear aperture D of the object-side surface of the first lens corresponding to the maximum field angle, and an image height h corresponding to the maximum field angle satisfy: D/h/FOV is less than or equal to 0.02.
Drawings
Fig. 1 is a schematic view of an optical lens according to a first embodiment of the present invention.
Fig. 2 is a schematic view of an optical lens according to a second embodiment of the present invention.
Fig. 3 is a schematic view of an optical lens according to a third embodiment of the present invention.
Detailed Description
The following description is presented to disclose the invention so as to enable any person skilled in the art to practice the invention. The preferred embodiments in the following description are given by way of example only, and other obvious variations will occur to those skilled in the art. The basic principles of the invention, as defined in the following description, may be applied to other embodiments, variations, modifications, equivalents, and other technical solutions without departing from the spirit and scope of the invention.
It will be understood by those skilled in the art that in the present disclosure, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship indicated in the drawings for ease of description and simplicity of description, and do not indicate or imply that the referenced devices or components must be constructed and operated in a particular orientation and thus are not to be considered limiting.
The invention provides an optical lens which is suitable for being applied to a vehicle-mounted lens, such as an optical lens which is matched with a photosensitive chip to realize image acquisition. The optical lens comprises 5 lenses, namely a first lens, a second lens, a third lens, a fourth lens and a fifth lens. The first lens, the second lens, the third lens, the fourth lens and the fifth lens are sequentially arranged from an object side to an image side.
Further, the first lens has a negative 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. That is, the first lens is a double concave lens.
It is worth mentioning that, because the first lens is a biconcave lens, the surface of the light entering direction, namely the surface opposite to the object side surface of the first lens, is a concave surface, the structure of the concave surface is beneficial to collecting more light, the light entering amount of the imaging system is increased, thereby improving the imaging quality, and the structure of the concave surface is beneficial to reducing the caliber of the lens, so that the optical lens is miniaturized.
The second lens has a positive optical power. 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. That is, the second lens is a biconvex lens. The second lens is used for converging and collecting the light rays passing through the first lens.
The third lens has a negative power. The object side surface of the third lens is a concave surface, and the image side surface of the third lens is a concave surface. That is, the third lens is a biconcave lens.
In some embodiments, the optical lens includes an optical stop disposed between the second lens and the third lens. The arrangement of the diaphragm is beneficial to effectively converging light rays of an imaging system, and the aperture of the lens of the optical lens is reduced. Of course, in other embodiments of the present invention, the diaphragm may also be disposed at other positions, such as between the first lens and the second lens, between the third lens and the fourth lens, and between the fourth lens and the fifth lens, and it should be understood by those skilled in the art that the disposition position of the diaphragm is not limited by the present invention.
The fourth lens has a positive optical power. The image side surface of the fourth lens is a convex surface.
In some embodiments, the object-side surface of the fourth lens is a convex surface, i.e., in this manner, the fourth lens is a biconvex lens.
In other embodiments, the object side of the fourth lens element is concave, i.e., in this manner, the fourth lens element is a meniscus lens with the meniscus convex toward the image side.
The fifth lens has a positive optical power. The object side surface of the fifth lens is a convex surface, and the image side surface of the fifth lens is a convex surface. That is, the fifth lens is a biconvex lens.
The fifth lens is used for transiting light rays, so that the light rays can reach an imaging surface smoothly.
In the optical lens provided by the invention, the optical lens may include an image plane for receiving an optical image formed by the optical lens. The imaging surface is, by way of example and not limitation, borne by an electronic component, such as a photosensitive element.
When the optical lens is applied to a camera device, the imaging surface is a photosensitive element, such as a photosensitive chip.
In the optical lens provided by the present invention, the optical lens may include a filter element to filter light. The filter element is exemplified by, but not limited to, an infrared filter element, or a blue glass filter, or a full transmission sheet.
In the optical lens provided by the present invention, the optical lens may include a plane mirror. In this embodiment of the invention, the planar mirror is arranged on the image side of the filter element. The planar mirror may be located between the filter element and the imaging surface.
Further, the optical lens parameters satisfy the following conditions:
if the maximum field angle of the optical lens is FOV, the image height corresponding to the maximum field angle of the optical lens is h, and the whole group of focal length values of the optical lens is F:
the FOV multiplied by F/h is more than or equal to 55 and less than or equal to 75; the imaging of the optical lens has larger distortion, the imaging center image is clear, and the peripheral image is distorted and compressed, so that a larger range of images can be obtained under the same chip size.
The optical length of the optical lens is TTL, the distance between the optical lens and the outermost point of the object side of the first lens and the imaging focal plane of the optical lens is the optical length of the optical lens, and the optical length TTL and the whole group of focal lengths F meet the following requirements:
TTL/F is less than or equal to 4; the optical lens satisfies miniaturization.
If the maximum clear aperture of the object-side surface of the first lens corresponding to the maximum field angle is D, the maximum clear aperture D, the maximum field angle FOV, and the image height h corresponding to the maximum field angle satisfy the following relationship:
D/h/FOV is less than or equal to 0.02; the aperture of the first lens of the optical lens is small, the whole volume of the optical lens is reduced, and the interference risk of equipment formed by the optical lens on front-end windshield is reduced.
It should be noted that, based on the structural features and parameter features of the optical lens of the present invention, the optical lens obtains many advantages, for example, but not limited to, the first lens of the optical lens is a biconcave lens, which increases distortion, so that when the optical lens is matched with a photosensitive chip, a wider range of imaging information is obtained under the same chip size, that is, the shooting range of the image capturing apparatus is increased; the first lens is a biconcave lens, so that distortion is increased, the central image of an imaging surface is clear, peripheral images are distorted and compressed, the resolution of the central area is improved, and the requirements of practical application are met, such as more accurate identification of information of a front vehicle; the first lens is a biconcave lens, so that more light rays can be collected, and the imaging quality is improved; the optical lens improves the image resolution, so that the image is clear, and the risk of software misjudgment in the image application process is reduced; the optical lens reduces the aperture of the lens and reduces the interference risk to the position of the front windshield; the optical lens is particularly suitable for being applied to a vehicle-mounted front-view lens, and meets the development requirements of enlarging the shooting range and improving the central resolution; the distortion and compression part of the peripheral image in the optical lens imaging can be corrected by software subsequently, so that clear image information with a larger range can be obtained. Of course, the optical lens of the present invention may also have other advantages, and those skilled in the art will appreciate that the advantages are not a limitation of the present invention.
The optical lens can be matched with the work of an electronic device, so that the collection and the reproduction of images are realized. The optical lens is suitable for being applied to a vehicle-mounted lens or a monitoring lens so as to acquire images. For example, a photosensitive element is combined, wherein the photosensitive element is connected to the optical lens, so as to form a camera module.
Specific examples are provided below to illustrate the optical lens and its parameters of the present invention in detail.
First embodiment
Referring to fig. 1, an optical lens according to a first embodiment of the present invention is schematically illustrated. The optical lens includes 5 lenses, which are a first lens 110, a second lens 120, a third lens 130, a fourth lens 140 and a fifth lens 150. The first lens element 110, the second lens element 120, the third lens element 130, the fourth lens element 140, and the fifth lens element 150 are arranged sequentially from an object side to an image side.
Further, the first lens 110 has a negative power. The object-side surface 111 of the first lens element 110 is concave, and the image-side surface 112 of the first lens element 110 is concave. That is, the first lens 110 is a double concave lens.
It should be noted that, since the first lens element 110 is a biconcave lens element, a surface of a light entering direction, that is, the object side surface 111 of the first lens element 110, is a concave surface, and the concave surface structure is favorable for collecting more light and increasing the light entering amount of the imaging system, thereby improving the imaging quality, and meanwhile, the concave surface structure is favorable for reducing the lens aperture and contributing to realizing miniaturization of the optical lens.
The second lens 120 has a positive optical power. The object-side surface 121 of the second lens element 120 is convex, and the image-side surface 122 of the second lens element 120 is convex. That is, the second lens 120 is a biconvex lens. The second lens 120 may collect and collect the light passing through the first lens 110.
The third lens 130 has a negative power. The object-side surface 131 of the third lens element 130 is concave, and the image-side surface 132 of the third lens element 130 is concave. That is, the third lens 130 is a biconcave lens.
In some embodiments, the optical lens further includes an optical stop 160, and the optical stop 160 is disposed between the second lens 120 and the third lens 130. The arrangement of the diaphragm 160 is beneficial to effectively converging light rays of an imaging system and reducing the lens aperture of the optical lens. Of course, in other embodiments of the present invention, the stop 160 may also be disposed at other positions, such as between the first lens 110 and the second lens 120, between the third lens 130 and the fourth lens 140, between the fourth lens 140 and the fifth lens 150, and the like, and it should be understood by those skilled in the art that the position of the stop is not limited by the present invention.
The fourth lens 140 has a positive optical power. The image-side surface 142 of the fourth lens element 140 is convex.
In some embodiments, the object side 141 of the fourth lens element 140 is convex, i.e., in this manner, the fourth lens element 140 is a biconvex lens element.
In other embodiments, the object side 141 of the fourth lens element 140 is concave, i.e., in this manner, the fourth lens element 140 is a meniscus lens with the meniscus convex toward the image side.
The fifth lens 150 has a positive optical power. An object-side surface 151 of the fifth lens element 150 is convex, and an image-side surface 152 of the fifth lens element 150 is convex. That is, the fifth lens 150 is a biconvex lens.
The fifth lens 150 may transition the light so that the light smoothly reaches the imaging surface 190 (mentioned later).
In the optical lens provided by the present invention, the optical lens may further include an image plane 190 for receiving an optical image formed by the optical lens. The imaging surface 190 is, by way of example and not limitation, borne by an electronic component, such as a photosensitive element.
When the optical lens is applied to an image pickup apparatus, the imaging surface 190 is a photosensitive element, such as a photosensitive chip.
In the optical lens of the present invention, the optical lens may further include a filter element 170 for filtering light.
In the optical lens provided by the present invention, the optical lens may further include a plane mirror 180. In this embodiment of the present invention, the planar mirror 180 is disposed on the image side of the filter element 170. The planar mirror 180 may be located between the filter element 170 and the imaging surface 190.
Table 1 shows detailed configuration data of the first embodiment of fig. 1, where R is a radius of curvature, d is a distance from a central plane, Nd is a refractive index, and Vd is an abbe number, where 1 to 4 and 6 to 11 sequentially represent respective lens surfaces from an object side to an image side, 12 and 13 represent both sides of the filter element 170, 14 and 15 represent both sides of the plane mirror 180, STO represents the stop 160, and IMA represents the image plane 190.
TABLE 1
From the above data, the formula parameters involved in this embodiment are calculated as follows:
(FOV×F)/h＝60.4064，TTL/F＝3.27404，D/h/FOV＝0.01607。
second embodiment
Referring to fig. 2, an optical lens according to a second embodiment of the present invention is schematically illustrated. The optical lens includes 5 lenses, which are a first lens 210, a second lens 220, a third lens 230, a fourth lens 240 and a fifth lens 250. The first lens element 210, the second lens element 220, the third lens element 230, the fourth lens element 240, and the fifth lens element 250 are arranged sequentially from an object side to an image side.
Further, the first lens 210 has a negative power. The object-side surface 211 of the first lens element 210 is concave, and the image-side surface 212 of the first lens element 210 is concave. That is, the first lens 210 is a double concave lens.
It should be noted that, since the first lens element 210 is a biconcave lens element, a surface of a light entering direction, that is, the object side surface 212 of the first lens element 210 is a concave surface, and the concave surface structure is favorable for collecting more light and increasing the light incident amount of the imaging system, thereby improving the imaging quality.
The second lens 220 has a positive optical power. The object-side surface 221 of the second lens element 220 is convex, and the image-side surface 222 of the second lens element 220 is convex. That is, the second lens 220 is a biconvex lens. The second lens 220 may collect and collect the light passing through the first lens 210.
The third lens 230 has a negative power. The object-side surface 231 of the third lens element 230 is concave, and the image-side surface 232 of the third lens element 230 is concave. That is, the third lens 230 is a biconcave lens.
In some embodiments, the optical lens further includes an aperture stop 260, and the aperture stop 260 is disposed between the second lens 220 and the third lens 230. The arrangement of the diaphragm 260 is beneficial to effectively converging light rays of an imaging system and reducing the lens aperture of the optical lens. Of course, in other embodiments of the present invention, the stop 260 may also be disposed at other positions, such as between the first lens 210 and the second lens 220, between the third lens 230 and the fourth lens 240, between the fourth lens 240 and the fifth lens 250, and the like, and it should be understood by those skilled in the art that the position of the stop is not limited by the present invention.
The fourth lens 240 has a positive optical power. The image-side surface 242 of the fourth lens element 240 is convex.
In some embodiments, the object side 241 of the fourth lens element 240 is convex, i.e., in this manner, the fourth lens element 240 is a biconvex lens element.
In other embodiments, the object side 241 of the fourth lens element 240 is concave, i.e., in this manner, the fourth lens element 240 is a meniscus lens with the meniscus convex toward the image side.
The fifth lens 250 has a positive optical power. The object-side surface 251 of the fifth lens element 250 is convex, and the image-side surface 252 of the fifth lens element 250 is convex. That is, the fifth lens 250 is a biconvex lens.
The fifth lens 250 may transition the light so that the light smoothly reaches the imaging surface 290 (mentioned later).
In the optical lens provided by the present invention, the optical lens may further include an image plane 290 for receiving an optical image formed by the optical lens. The imaging surface 290 is, by way of example and not limitation, borne by an electronic component, such as a photosensitive element.
When the optical lens is applied to an image pickup apparatus, the imaging surface 290 is a photosensitive element, such as a photosensitive chip.
In the optical lens provided by the present invention, the optical lens may include a filter element 270 for filtering light.
In the optical lens provided by the present invention, the optical lens may include a plane mirror 280. In this embodiment of the present invention, the planar mirror 280 is disposed on the image side of the filter element 270. The planar mirror 280 may be positioned between the filter element 270 and the imaging surface 290.
Table 2 shows detailed configuration data of the second embodiment of fig. 2, where R is a radius of curvature, d is a distance from a central plane, Nd is a refractive index, and Vd is an abbe number, where 1 to 4 and 6 to 11 sequentially represent respective lens surfaces from an object side to an image side, 12 and 13 represent both sides of the filter element 270, 14 and 15 represent both sides of the plane mirror 280, STO represents the stop 260, and IMA represents the image plane 290.
TABLE 2
From the above data, the formula parameters involved in this embodiment are calculated as follows:
(FOV×F)/h＝61.1061，TTL/F＝3.21354，D/h/FOV＝0.01428。
third embodiment
Referring to fig. 3, an optical lens according to a third embodiment of the present invention is schematically illustrated. The optical lens includes 5 lens elements, which are a first lens element 310, a second lens element 320, a third lens element 330, a fourth lens element 340 and a fifth lens element 350. The first lens element 310, the second lens element 320, the third lens element 330, the fourth lens element 340, and the fifth lens element 350 are arranged from an object side to an image side in this order.
Further, the first lens 310 has a negative power. The object-side surface 311 of the first lens element 310 is concave, and the image-side surface 312 of the first lens element 310 is concave. That is, the first lens 310 is a double concave lens.
It should be noted that, since the first lens element 310 is a biconcave lens element, a surface of a light entering direction, that is, the object side surface 311 of the first lens element 310, is a concave surface, and the concave surface structure is favorable for collecting more light and increasing the light incident amount of the imaging system, thereby improving the imaging quality, and meanwhile, the concave surface structure is favorable for reducing the lens aperture and contributing to realizing miniaturization of the optical lens.
The second lens 320 has positive optical power. The object-side surface 321 of the second lens element 320 is convex, and the image-side surface 322 of the second lens element 320 is convex. That is, the second lens 320 is a biconvex lens. The second lens 320 may collect and collect the light passing through the first lens 310.
The third lens 330 has a negative power. The object-side surface of the third lens element 330 is concave 331, and the image-side surface 332 of the third lens element 330 is concave. That is, the third lens 330 is a biconcave lens.
In some embodiments, the optical lens further includes an aperture stop 360, and the aperture stop 360 is disposed between the second lens 320 and the third lens 330. The arrangement of the diaphragm 360 is beneficial to effectively converging light rays of an imaging system, and the aperture of a lens of the optical lens is reduced. Of course, in other embodiments of the present invention, the stop 360 may also be disposed at other positions, such as between the first lens 310 and the second lens 320, between the third lens 330 and the fourth lens 340, between the fourth lens 340 and the fifth lens 350, and the like, and it should be understood by those skilled in the art that the position of the stop is not limited by the present invention.
The fourth lens 340 has a positive optical power. The image-side surface 342 of the fourth lens element 340 is convex.
In some embodiments, the object side 341 of the fourth lens 340 is a convex surface, that is, in this manner, the fourth lens 340 is a biconvex lens.
In other embodiments, the object side 341 of the fourth lens element 340 is concave, i.e., in this manner, the fourth lens element 340 is a meniscus lens with the meniscus convex toward the image side.
The fifth lens 350 has a positive optical power. An object-side surface 351 of the fifth lens element 350 is convex, and an image-side surface 352 of the fifth lens element 350 is convex. That is, the fifth lens 350 is a biconvex lens.
The fifth lens 350 may transition the light so that the light smoothly reaches the image plane 390 (mentioned later).
In the optical lens provided by the present invention, the optical lens may further include an image plane 390 for receiving an optical image formed by the optical lens. The imaging surface 390 is, by way of example and not limitation, borne by an electronic component, such as a photosensitive element.
When the optical lens is applied to an image pickup apparatus, the imaging surface 390 is a photosensitive element, such as a photosensitive chip.
In the optical lens provided by the present invention, the optical lens may further include a filter element 370 to filter light.
In the optical lens provided by the present invention, the optical lens may further include a plane mirror 380. In this embodiment of the invention, the planar mirror 380 is disposed on the image side of the filter element 370. The planar mirror 380 may be positioned between the filter element 370 and the imaging surface 390.
Table 3 shows detailed configuration data of the third embodiment of fig. 3, where R is a radius of curvature, d is a distance from the central plane, Nd is a refractive index, and Vd is an abbe number, where 1 to 4 and 6 to 11 sequentially represent respective lens surfaces from the object side to the image side, 12 and 13 represent both sides of the filter element 370, 14 and 15 represent both sides of the plane mirror 3 and 80, STO represents the stop 360, and IMA represents the image plane 390.
TABLE 3
From the above data, the formula parameters involved in this embodiment are calculated as follows:
(FOV×F)/h＝61.2472，TTL/F＝3.51591，D/h/FOV＝0.01350。
it will be appreciated by persons skilled in the art that the embodiments of the invention described above and shown in the drawings are given by way of example only and are not limiting of the invention. The objects of the invention have been fully and effectively accomplished. The functional and structural principles of the present invention have been shown and described in the examples, and any variations or modifications of the embodiments of the present invention may be made without departing from the principles.
Claims (7)
1. An optical lens, comprising:
the first lens has 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;
a second lens having a positive optical power;
the third lens has negative focal power, the object side surface of the third lens is a concave surface, and the image side surface of the third lens is a concave surface;
a fourth lens having a positive optical power; and
a fifth lens element with positive focal power, wherein the object-side surface of the fifth lens element is convex, and the image-side surface of the fifth lens element is convex,
wherein the first lens element, the second lens element, the third lens element, the fourth lens element and the fifth lens element are arranged in order from an object side to an image side, an
Wherein the maximum field angle FOV of the optical lens, the image height h corresponding to the maximum field angle and the whole group of focal lengths F of the optical lens satisfy: the FOV multiplied by F/h is more than or equal to 55 and less than or equal to 75.
2. The optical lens of claim 1, wherein the object-side surface of the second lens element is convex and the image-side surface of the second lens element is convex.
3. The optical lens barrel of claim 1, wherein the image side surface of the fourth lens is convex.
4. The optical lens of claim 3, wherein the object side surface of the fourth lens is convex.
5. The optical lens of claim 3, wherein the object side surface of the fourth lens is concave.
6. An optical lens according to any one of claims 1 to 5, wherein an optical length TTL of the optical lens and a whole set of focal length values F of the optical lens satisfy: TTL/F is less than or equal to 4.
7. The optical lens according to any one of claims 1 to 5, wherein a maximum field angle FOV of the optical lens, a maximum clear aperture D of an object-side surface of the first lens corresponding to the maximum field angle, and an image height h corresponding to the maximum field angle satisfy: D/h/FOV is less than or equal to 0.02.
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| CN111830673A (en) * | 2019-04-23 | 2020-10-27 | 宁波舜宇车载光学技术有限公司 | Optical lens and imaging apparatus |
| CN114384669A (en) * | 2021-12-31 | 2022-04-22 | 福建福光天瞳光学有限公司 | Infrared imaging lens and imaging method thereof |
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