CN113050251A

CN113050251A - Optical imaging system, image capturing device and optical device

Info

Publication number: CN113050251A
Application number: CN201911381985.6A
Authority: CN
Inventors: 刘彬彬; 李明; 邹海荣; 张文燕
Original assignee: Jiangxi Jingchao Optical Co Ltd
Current assignee: Jiangxi Jingchao Optical Co Ltd
Priority date: 2019-12-27
Filing date: 2019-12-27
Publication date: 2021-06-29

Abstract

The invention discloses an optical imaging system, which sequentially comprises the following components from an object side to an image side: the first lens with positive bending force, and the object side paraxial region is a convex surface; the second lens with positive bending force, and the object side paraxial region is a concave surface, and the image side paraxial region is a convex surface; a third lens with negative bending force, wherein the paraxial region of the object side surface is a convex surface, and the paraxial region of the image side surface is a concave surface; the fourth lens has negative bending force, and the paraxial region of the object side surface is a concave surface; the fifth lens has positive bending force, and the paraxial region of the object side surface is a convex surface; and the sixth lens has negative bending force, and the image side paraxial region is concave. The optical imaging system satisfies the relation: Fno/TTL <0.4, 0.2< GTL6/ITL6< 0.3. Therefore, when Fno/TTL and GTL6/ITL6 satisfy the relational expression, the micro-design can be realized, the light transmission aperture can be increased, the light input quantity is larger compared with other micro-camera lenses, and the requirements of high-definition image and dark light shooting can be met.

Description

Optical imaging system, image capturing device and optical device

Technical Field

The present invention relates to the field of optical imaging technologies, and in particular, to an optical imaging system, an image capturing device, and an optical device.

Background

With the wide application of mobile phones, tablet computers, unmanned planes, computers and other electronic products in life, various technological improvements are emerging. The improvement and innovation of the shooting effect of the camera lens in the improvement of novel electronic products becomes one of the focuses of people, and meanwhile, the improvement and innovation becomes an important content of technology improvement, and whether a micro camera element can be used for shooting pictures with high picture quality, high resolution and high definition, even pictures with clear picture quality under the dark light condition, becomes a key factor for selecting which electronic product by modern people. On the other hand, photosensitive elements such as a photoelectric coupler (CCD) and a Complementary Metal Oxide Semiconductor (CMOS) have improved performance with technological progress, and this makes it possible to photograph high-quality images and brings people a higher-quality image-taking experience. Therefore, miniaturization and performance improvement of the optical imaging system design become key factors for improving the shooting quality of the current camera.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art. Therefore, an object of the present invention is to provide an optical imaging system, which can satisfy the requirements of micro-design, increase the clear aperture, have a larger light-entering amount, and satisfy the requirements of high-definition image and dark light shooting.

The invention also provides an image capturing device.

The invention further provides an optical device.

According to the optical imaging system of the embodiment of the first aspect of the present invention, in order from the object side to the image side, the optical imaging system comprises:

the first lens with positive bending force, wherein the object side paraxial region of the first lens is a convex surface;

the second lens has positive bending force, and the paraxial region of the object side surface of the second lens is a concave surface and the paraxial region of the image side surface of the second lens is a convex surface;

a third lens element with negative refractive power, wherein the paraxial region of the object side surface of the third lens element is convex and the paraxial region of the image side surface of the third lens element is concave;

-a fourth lens having a negative refracting power, the object side paraxial region of said fourth lens being concave;

-a fifth lens having a positive refractive power, said fifth lens having a convex object-side paraxial region;

-a sixth lens element having a negative refracting power, the image side paraxial region of said sixth lens element being concave;

the optical imaging system satisfies the relation:

Fno/TTL<0.4，0.2<GTL6/ITL6<0.3；

wherein, Fno is an f-number of the optical lens assembly, TTL is a distance on the optical axis from the object-side surface of the first lens element to the image plane, GTL6 is a shortest distance from the object-side surface of the sixth lens element to the image-side surface of the sixth lens element parallel to the optical axis, and ITL6 is a longest distance from the object-side surface of the sixth lens element to the image-side surface of the sixth lens element parallel to the optical axis.

When Fno/TTL >0.4, the amount of light passing through the optical system is insufficient while achieving miniaturization, and the sharpness of the captured image is reduced. According to the optical imaging system, when Fno/TTL is less than 0.4, the lens system can meet the design requirements of large aperture and miniaturization, provides enough light flux for shooting, and meets the requirement of high-image-quality and high-definition shooting. Furthermore, the optical imaging system further satisfies the relation: 0.2< GTL6/ITL6<0.3, GTL6 is the shortest (thin) distance from the object-side surface of the sixth lens element to the image-side surface parallel to the optical axis, and ITL6 is the longest (thick) distance from the object-side surface of the sixth lens element to the image-side surface parallel to the optical axis. When the GTL6/ITL6 satisfies the above relation, the thickness ratio of the lens is reasonably controlled, so that the lens realizes the ultra-thin design at the optical axis, the total length of the lens can be effectively reduced, and the processability and the forming yield of the lens can be ensured.

According to some embodiments of the invention, the optical imaging system satisfies the following relation: 1.5< TTL/DL < 3.0. Wherein, TTL is the distance between the object side surface of the first lens and the imaging surface of the optical imaging system on the optical axis, and DL is the aperture diameter of the optical imaging system.

When TTL/DL satisfies above-mentioned relational expression, just can guarantee the miniaturized design of camera lens and provide the required light flux of camera lens shooting, realize the high-definition shooting effect of high-definition quality, when TTL/D <1.5, the light flux bore can be too big when satisfying the miniaturized design, cause marginal light to get into imaging system, reduce imaging quality, if TTL/D >3, when satisfying the miniaturization, can cause the light flux bore undersize of diaphragm, can't satisfy the system light flux, can not realize the high-definition shooting requirement of dim light scene, consequently only satisfy 1.5< TTL/D <3.0 and can compromise optical performance optimization simultaneously, the structure is miniaturized.

According to some embodiments of the invention, the optical imaging system satisfies the following relation: 0.5< DL/Imgh < 0.8. DL is the diameter of the aperture of the diaphragm of the optical imaging system, and Imgh is half of the diagonal length of the effective pixel area of the electronic photosensitive element on the imaging surface of the optical imaging system. The aperture diameter of the optical imaging system diaphragm determines the light flux of the whole optical imaging system, and the size of the photosensitive surface determines the image definition and the pixel size of the whole camera system.

When DL/Imgh satisfies the relational expression, the DL/Imgh and the relational expression are reasonably matched to ensure enough light flux and ensure the definition of a shot image. If DL/Imgh is greater than 0.8, the exposure is too high, the brightness is too high, and the picture quality is affected, if DL/Imgh is less than 0.5, the light transmission is insufficient, and if the relative brightness of the light is insufficient, the picture definition is reduced.

According to some embodiments of the invention, the optical imaging system satisfies the following relation: TTL/Imgh < 1.5. Wherein, Imgh is half of the diagonal length of the effective pixel area of the electronic photosensitive element on the imaging surface of the optical imaging system, and TTL is the distance from the object side surface of the first lens to the imaging surface of the optical imaging system on the optical axis.

When TTL/Imgh satisfies the above relational expression, both miniaturization and high-definition shooting can be achieved. If TTL/Imgh >1.5, the miniaturization is realized and the high-definition imaging effect cannot be ensured.

According to some embodiments of the invention, the optical imaging system satisfies the following relation: 0.3< GTL5/ITL5< 0.6. The GTL5 is the shortest distance from the object side surface to the image side surface of the fifth lens parallel to the optical axis, and the ITL5 is the longest distance from the object side surface to the image side surface of the fifth lens parallel to the optical axis.

When the GTL5/ITL5 satisfies the above relation, the lens is designed to be ultra-thin at the optical axis, the total length of the optical imaging system can be effectively compressed, the ultra-thin design concept is realized, and the processability and the molding yield of the lens can be ensured. If GTL5/ITL5>0.3, the ultra-thin design requirement cannot be realized; when GTL5/ITL5 is less than 0.2, the center is too thin, the production and processing requirements cannot be met, and the forming yield is ensured.

According to some embodiments of the invention, the optical imaging system satisfies the following relation: 1.0< TTL/f < 2.0; wherein, f is the effective focal length of the optical imaging system, and TTL is the distance from the object side surface of the first lens to the imaging surface of the optical imaging system on the optical axis.

When TTL/f satisfies the above relational expression, not only can the miniaturization of the optical lens be realized, but also the better convergence of light on an imaging surface can be ensured. If TTL/f is less than or equal to 1.0, the optical length of the lens group is too short, which increases the sensitivity of the system and is not favorable for the convergence of light on the image plane. When TTL/f is greater than or equal to 2, the optical length of the lens group is too long, which causes too large angle of the chief ray of the light entering the imaging surface, and the light at the edge of the imaging surface of the system can not be imaged on the photosensitive surface, resulting in incomplete imaging information.

According to some embodiments of the invention, the optical imaging system satisfies the following relation: 0.6< f/f1< 1; wherein f1 is the optical effective focal length of the first lens, and f is the effective focal length of the optical imaging system. The first lens provides all optical information of the lens group from an object space to an image space, and the aperture size and the focal length of the first lens determine the acquisition of the optical information of the object space by the optical imaging system.

When f/f1 satisfies the above relation, the lens processing process is simple, and the aberration generated by the first lens is corrected with a suitable difficulty, so that the shooting requirement can be satisfied. When f/f1 is greater than or equal to 1, the system sensitivity is increased, the processing technology is difficult, and the aberration generated by the first lens is difficult to correct, so that the shooting requirement is difficult to meet. When f/f1 is less than or equal to 0.6, the focal length ratio of the first lens and the optical system is not proper, and the aberration generated by the first lens cannot be corrected.

According to some embodiments of the invention, the optical imaging system satisfies the following relation: -600< (R1+ R2)/F1< 50; wherein R1 is the curvature radius of the object side paraxial region of the first lens, R2 is the curvature radius of the image side paraxial region of the first lens, and f1 is the optical effective focal length of the first lens. The first lens provides all optical information of the lens group from an object space to an image space and meets the requirement of large caliber.

When the (R1+ R2)/F1 satisfies the above relation, the processing is facilitated, the acquisition of object space light information by the optical imaging system is facilitated, and a good imaging effect can be obtained. When (R1+ R2)/f1 is not less than 50, the sensitivity of the optical system is increased, which is not beneficial to processing; when the ratio of (R3+ R4)/f1 is less than or equal to-600, the optical system is not favorable for obtaining object space optical information, and the imaging effect cannot meet the design expectation requirement.

According to some embodiments of the invention, the optical imaging system satisfies the following relation: -0.3< R5/R6< -0.2; wherein R5 is the curvature radius of the paraxial region of the object side surface of the third lens, and R6 is the curvature radius of the paraxial region of the image side surface of the third lens.

When R5/R6 satisfies the above relation, the curvature radius of the object-side paraxial region and the curvature radius of the image-side paraxial region of the third lens are appropriate, so that the incident angle can be reasonably increased to satisfy the requirement of the optical imaging system on image height, and meanwhile, the sensitivity of the system is reduced and the assembly stability is improved.

According to some embodiments of the invention, the optical imaging system satisfies the following relation: -1.8< f3/f < -1; wherein f3 is the optical effective focal length of the third lens, and f is the effective focal length of the optical imaging system.

When f3/f satisfies the above relation, the ratio of the focal length of the third lens element to the focal length of the system can effectively reduce the total length of the system, which is beneficial to the convergence of light on the image plane. When f3/f is less than or equal to-1.8, the total length of the system is too large, and the assembly sensitivity is increased. When f3/f is not less than-1, stray light of the lens can be increased, and imaging quality is affected.

According to some embodiments of the invention, the optical imaging system satisfies the following relation: 1< (R7 × R8)/(R7+ R8) < 3; wherein R7 is the curvature radius of the object side paraxial region of the fourth lens, and R8 is the curvature radius of the image side paraxial region of the fourth lens.

When (R7 × R8)/(R7+ R8) satisfies the above relation, the curvature radius of the object-side paraxial region and the curvature radius of the image-side paraxial region of the fourth lens element are appropriate, so that the spherical aberration of the optical imaging system can be reasonably corrected, the distortion aberration and astigmatism can be improved, the system sensitivity can be reduced, and the assembly stability can be improved.

According to some embodiments of the invention, the optical imaging system satisfies the following relation: fno < 2; fno is the optical lens group diaphragm number.

When Fno satisfies the above relation, the optical imaging system can have sufficient light input, and the electronic device can shoot high-quality night scenes, starry sky scenes and other object space scenes with low light brightness.

An image capturing apparatus according to an embodiment of a second aspect of the present invention includes: the electronic induction element is arranged at the image side of the optical imaging system.

An electronic device according to an embodiment of the third aspect of the invention includes: the shell and get for instance the device, the shell is provided with the mounting hole, get for instance the device set up in the shell just can acquire the image.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a schematic diagram of an optical imaging system according to an embodiment of the present invention;

FIG. 2 is a longitudinal spherical aberration diagram (mm) of an optical imaging system according to an embodiment of the present invention;

FIG. 3 shows astigmatism (mm) of an optical imaging system according to an embodiment of the invention;

FIG. 4 is a distortion curve (%) of an optical imaging system according to an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of a second optical imaging system according to an embodiment of the present invention;

FIG. 6 is a longitudinal spherical aberration diagram (mm) of a second optical imaging system according to an embodiment of the present invention;

FIG. 7 shows astigmatism (mm) of a second optical imaging system according to an embodiment of the invention;

FIG. 8 is a distortion curve (%) of a second optical imaging system according to an embodiment of the present invention;

FIG. 9 is a schematic structural diagram of a three-optical imaging system according to an embodiment of the present invention;

FIG. 10 is a longitudinal spherical aberration diagram (mm) of a three-optic imaging system in accordance with an embodiment of the present invention;

FIG. 11 is an astigmatism (mm) of a three-optic imaging system according to an embodiment of the invention;

FIG. 12 is a distortion curve (%) of a three-optic imaging system according to an embodiment of the present invention;

FIG. 13 is a schematic diagram of a four-optic imaging system according to an embodiment of the present invention;

FIG. 14 is a longitudinal spherical aberration diagram (mm) of a four-optic imaging system in accordance with an embodiment of the present invention;

FIG. 15 is an astigmatism (mm) of a four-optic imaging system in accordance with an embodiment of the present invention;

FIG. 16 is a distortion curve (%) for a four-optic imaging system in accordance with an embodiment of the present invention;

FIG. 17 is a schematic structural diagram of a five-optical imaging system according to an embodiment of the present invention;

FIG. 18 is a longitudinal spherical aberration diagram (mm) of a five-optic imaging system in accordance with an embodiment of the present invention;

FIG. 19 is an astigmatism (mm) of a five-optic imaging system of an embodiment of the invention;

FIG. 20 is a distortion curve (%);

FIG. 21 is a schematic diagram of a six-optic imaging system according to an embodiment of the present invention;

FIG. 22 is a longitudinal spherical aberration diagram (mm) of a six-optic imaging system in accordance with an embodiment of the present invention;

FIG. 23 is an astigmatism (mm) of a six-optic imaging system according to an embodiment of the invention;

FIG. 24 is a distortion curve (%);

FIG. 25 is a schematic diagram of a seventh optical imaging system according to an embodiment of the invention;

FIG. 26 is a longitudinal spherical aberration diagram (mm) of a seven optical imaging system in accordance with an embodiment of the present invention;

FIG. 27 shows astigmatism (mm) of a seven-optic imaging system according to an embodiment of the invention;

fig. 28 is a distortion curve (%) of the seven optical imaging system according to the embodiment of the present invention.

Reference numerals:

the aperture S0;

a first lens L1; the object side S1 of the first lens; the image-side surface S2 of the first lens L1;

a second lens L2; the object side S3 of the second lens; the image-side surface S4 of the second lens;

a third lens L3; the object-side surface S5 of the third lens; the image-side surface S6 of the third lens;

a fourth lens L4; the object-side surface S7 of the fourth lens; the image-side surface S8 of the fourth lens;

a fifth lens L5; the object-side surface S9 of the fifth lens; the image-side surface S10 of the fifth lens;

a sixth lens L6; the object-side surface S11 of the sixth lens; the image-side surface S12 of the sixth lens;

an infrared cut filter 110; an object side surface S13 of the infrared cut filter; an image side surface S14 of the infrared cut filter;

the image forming surface S15.

Detailed Description

Embodiments of the present invention will be described in detail below, the embodiments described with reference to the drawings being illustrative, and the embodiments of the present invention will be described in detail below.

An optical imaging system according to an embodiment of the present invention is described below with reference to fig. 1 to 28.

As shown in fig. 1, an embodiment of the present invention provides an optical imaging system including: the image pickup lens includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, and a sixth lens L6, which are arranged in order from an object side to an image side.

The first lens element L1 has positive refractive power, and the paraxial region of the object-side surface S1 of the first lens element L1 is convex, and the paraxial region of the image-side surface S2 is convex or concave. The second lens element L2 has positive refractive power, and the object-side surface S3 of the second lens element L2 is concave in the paraxial region thereof, and the image-side surface S4 of the second lens element L2 is convex in the paraxial region thereof. The third lens element L3 has negative refractive power, and the paraxial region of the object-side surface S5 of the third lens element L3 is convex, and the paraxial region of the image-side surface S6 of the third lens element L3 is concave. The fourth lens element L4 has negative refractive power, and the paraxial region of the object-side surface S7 of the fourth lens element L4 is concave, and the paraxial region of the image-side surface S8 of the fourth lens element L4 is concave or convex. The fifth lens element L5 has positive refractive power, and the paraxial region of the object-side surface S9 of the fifth lens element L5 is convex, and the paraxial region of the image-side surface S10 of the fifth lens element L5 is concave or convex. The sixth lens element L6 has negative refractive power, and the paraxial region of the object-side surface S11 and the paraxial region of the image-side surface S12 of the sixth lens element L6 are concave or convex.

The optical imaging system satisfies the relation: Fno/TTL <0.4, and 0.2< GTL6/ITL6< 0.3. Wherein, Fno is an f-number of the optical lens assembly, TTL is a distance on the optical axis from the object-side surface S1 of the first lens element L1 to the image-side surface S15, GTL6 is a shortest distance from the object-side surface S11 to the image-side surface S12 of the sixth lens element L6, and ITL6 is a longest distance from the object-side surface S11 to the image-side surface S12 of the sixth lens element L6, which are parallel to the optical axis.

Specifically, the optical imaging system satisfies the relation: Fno/TTL is less than 0.4, the optical imaging system meeting the relational expression can simultaneously meet the design requirements of large aperture and miniaturization of a lens system, provides enough light flux for shooting and shooting, and meets the requirement of high-image-quality and high-definition shooting. Therefore, the characteristics of large aperture and miniaturized structure can be satisfied only if Fno/TTL < 0.4. If Fno/TTL is greater than 0.4, the light-transmitting amount of the optical system is insufficient while the miniaturization is considered, and the definition of a shot picture is reduced.

Furthermore, the optical imaging system further satisfies the relation: 0.2< GTL6/ITL6< 0.3. The lens meeting the relational expression is designed to be ultrathin at the optical axis, so that the total length of the optical imaging system can be effectively compressed, the ultrathin design concept is realized, but if the center is too thin, the production and processing requirements cannot be met, and the forming yield cannot be ensured, so that the thickest part and the thinnest part of the lens can meet a certain proportional relation to ensure the machinability and the forming yield. If GTL6/ITL6>0.3, the ultra-thin design requirement cannot be realized; when GTL6/ITL6 is less than 0.2, the center is too thin, the production and processing requirements cannot be met, and the forming yield is ensured.

Therefore, by simultaneously satisfying the two relational expressions, the optical imaging system can take into account both miniaturization and large light flux, so that a high-definition picture can be shot, the total length can be further reduced, and the miniaturization design concept can be better met.

In certain embodiments, the optical imaging system satisfies the following relationship: 1.5< TTL/DL < 3.0. Wherein, TTL is the distance from the object-side surface S1 of the first lens element L1 to the image plane S15 of the optical imaging system on the optical axis, and DL is the aperture diameter of the optical imaging system.

Specifically, lens miniaturization can be ensured only when TTL/DL satisfies the above-described relational expression, and the amount of light passing required for lens shooting is provided, thereby achieving a high-quality and high-definition shooting effect. If TTL/D is less than 1.5, the light-passing aperture is too large when the miniaturization design is met, so that marginal light rays enter the optical imaging system, and the imaging quality of the optical imaging system is reduced; if TTL/D >3, when satisfying the miniaturization, can cause the diaphragm to lead to the fact the light aperture undersize, can't satisfy optical imaging system's light flux volume requirement, can not realize the high definition of dim light scene and shoot the requirement.

In certain embodiments, the optical imaging system satisfies the following relationship: 0.5< DL/Imgh < 0.8. Wherein DL is the diameter of the aperture of the diaphragm of the optical imaging system, and Imgh is half of the diagonal length of the effective pixel area of the electronic photosensitive element on the imaging surface.

Specifically, the aperture diameter of the diaphragm of the optical imaging system determines the light transmission quantity of the whole optical imaging system, the size of the photosensitive surface determines the image definition and the pixel size of the whole camera system, and the light transmission quantity and the pixel size can be reasonably matched to ensure enough light transmission quantity and the definition of a shot image. If DL/Imgh is greater than 0.8, the optical imaging system is exposed too much, the brightness is too high, and the picture quality of the electronic equipment is influenced; if DL/Imgh is less than 0.5, the light flux of the optical imaging system is insufficient, and the picture definition of the electronic equipment is reduced when the relative brightness of the light is insufficient.

In certain embodiments, the optical imaging system satisfies the following relationship: TTL/Imgh < 1.5. Where, Imgh is half of the diagonal length of the effective pixel area of the electronic photosensitive element on the imaging surface, and TTL is the distance from the object-side surface of the first lens L1 to the imaging surface of the optical imaging system on the optical axis.

Specifically, both miniaturization and high-definition shooting can be achieved when TTL/Imgh satisfies the above relational expression, and both miniaturization and high-definition shooting can be achieved when the above relational expression is satisfied. If TTL/Imgh is more than 1.5, the miniaturization is realized, and the high-definition imaging effect cannot be ensured, so that the performance of the electronic equipment is poor.

In certain embodiments, the optical imaging system satisfies the following relationship: 0.3< GTL5/ITL5< 0.6. The GTL5 is the shortest distance from the object-side surface S9 to the image-side surface S10 of the fifth lens L5 parallel to the optical axis, and the ITL5 is the longest distance from the object-side surface S9 to the image-side surface S10 of the fifth lens L5 parallel to the optical axis.

Specifically, when GTL5/ITL5 satisfies the above relation, the lens is designed to be ultra-thin at the optical axis, the total length of the optical imaging system can be effectively reduced, the ultra-thin design concept can be realized, and the processability and the molding yield of the lens can be ensured. If GTL5/ITL5>0.3, the ultra-thin design requirement cannot be realized; when GTL5/ITL5 is less than 0.2, the center is too thin, the production and processing requirements cannot be met, and the forming yield is ensured.

In certain embodiments, the optical imaging system satisfies the following relationship: 1.0< TTL/f < 2.0; where f is an effective focal length of the optical imaging system, and TTL is an axial distance from the object-side surface S1 of the first lens element L1 to the image plane S15 of the optical imaging system.

Specifically, when TTL/f satisfies the above relationship, the optical imaging system can reasonably control the focal length and the total length of the optical lens, thereby not only realizing miniaturization of the optical lens, but also ensuring better convergence of light on the imaging surface S15. If TTL/f is less than or equal to 1.0, the optical length of the lens group is too short, which increases the sensitivity of the system and is not favorable for the convergence of light on the image plane. When TTL/f is greater than or equal to 2, the optical length of the lens group is too long, which may cause too large angle of the main light ray when the light enters the imaging surface, and the light at the edge of the imaging surface S15 of the optical imaging system cannot be imaged on the photosensitive surface, resulting in incomplete imaging information.

In certain embodiments, the optical imaging system satisfies the following relationship: 0.6< f/f1< 1; where f1 is the optical effective focal length of the first lens L1, and f is the effective focal length of the optical imaging system. The first lens L1 provides all the optical information from object space to image space, and the aperture size and focal length of the first lens L1 determine the acquisition of the optical information from object space by the optical imaging system.

Specifically, when f/f1 satisfies the above relation, the lens processing process is simple, and the aberration correction difficulty caused by the first lens L1 is appropriate, which can satisfy the shooting requirement. If f/f1 is more than or equal to 1, the system sensitivity is increased, the processing technology is difficult, and the aberration correction difficulty generated by the first lens L1 is increased, so that the shooting requirement of a user is difficult to meet; when f/f1 is less than or equal to 0.6, the focal length of the first lens L1 and the optical system is not properly matched, and the aberration generated by the first lens L1 cannot be corrected.

In certain embodiments, the optical imaging system satisfies the following relationship: -600< (R1+ R2)/f1< 50; wherein R1 is the curvature radius of the paraxial region of the object side surface S1 of the first lens L1, R2 is the curvature radius of the paraxial region of the image side surface S2 of the first lens L1, and f1 is the optical effective focal length of the first lens L1. The first lens L1 provides all optical information from object space to image space and satisfies the requirement of large aperture.

Specifically, when (R1+ R2)/f1 satisfies the above relation, processing is facilitated, and acquisition of object space light information by the optical imaging system is facilitated, so that a good imaging effect can be obtained. If (R1+ R2)/f1 is more than or equal to 50, the sensitivity of the optical imaging system is increased, which is not beneficial to the processing of the optical information by the optical imaging system; when (R3+ R4)/f1 is less than or equal to-600, the optical system is not favorable for obtaining object space light information, and the imaging effect of the optical imaging system can not reach the design expectation.

In certain embodiments, the optical imaging system satisfies the following relationship: -0.3< R5/R6< -0.2; wherein R5 is the paraxial region radius of curvature of the object-side surface S5 of the third lens L3, and R6 is the paraxial region radius of curvature of the image-side surface S6 of the third lens L3.

Specifically, when R5/R6 satisfies the above relation, the radius of curvature of the paraxial region of the object-side surface S5 and the radius of curvature of the paraxial region of the image-side surface S6 of the third lens L3 are suitable, so that the incident angle can be increased reasonably to satisfy the requirement of the optical imaging system for image height, and at the same time, the sensitivity of the system is reduced, and the assembly stability is improved.

In certain embodiments, the optical imaging system satisfies the following relationship: -1.8< f3/f < -1; where f3 is the optical effective focal length of the third lens L3, and f is the effective focal length of the optical imaging system.

Specifically, when f3/f satisfies the above relation, the ratio of the focal length of the third lens element L3 to the system focal length can effectively reduce the total length of the system, which is favorable for converging light on the image plane. If f3/f is less than or equal to-1.8, the total length of the optical imaging system is too large, and the assembly sensitivity is increased; when f3/f is larger than or equal to-1, stray light of the lens can be increased, and the imaging quality of the optical imaging system is influenced.

In certain embodiments, the optical imaging system satisfies the following relationship: 1< (R7 × R8)/(R7+ R8) < 3; wherein R7 is the paraxial region curvature radius of the object side surface S7 of the fourth lens L4, and R8 is the paraxial region curvature radius of the image side surface S8 of the fourth lens L4.

Specifically, when (R7 × R8)/(R7+ R8) satisfies the above relation, the curvature radius of the paraxial region of the object-side surface S7 and the curvature radius of the paraxial region of the image-side surface S8 of the fourth lens L4 are appropriate, which can reasonably correct the spherical aberration of the optical imaging system, improve distortion aberration and astigmatism, and reduce system sensitivity and improve assembly stability.

In certain embodiments, the optical imaging system satisfies the following relationship: fno < 2; fno is the optical lens group diaphragm number.

Specifically, when Fno satisfies the above relation, the optical imaging system can have sufficient light incident amount, so as to capture high-quality night scenes, starry sky scenes, and other object space scenes with low brightness.

The optical imaging system of the present invention will be described in detail by the following specific embodiments with reference to the attached drawings.

The first embodiment is as follows:

the optical imaging system includes, in order from the object side to the image side, a stop S0, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, an infrared cut filter 110, and an imaging surface S15.

The first lens element L1 has positive refractive power and is made of plastic material. The paraxial region of the object side surface S1 is convex, and the paraxial region of the image side surface S2 is concave; the object side S1 is concave in the paraxial region and the object side S2 is convex in the paraxial region. And are all aspheric surfaces.

The second lens element L2 has positive refractive power and is made of plastic material. The object side surface S3 paraxial region is concave, and the image side surface S4 paraxial region is convex; the object side S3 is convex in the paraxial region of the circumference, and the image side S4 is convex in the paraxial region. And are all aspheric surfaces.

The third lens element L3 has negative refractive power and is made of plastic material. The paraxial region of the object side surface S5 is convex, and the paraxial region of the image side surface S6 is concave; the object side S5 is concave in the paraxial region and the object side S6 is concave in the paraxial region. And are all aspheric surfaces.

The fourth lens element L4 has negative refractive power and is made of plastic material. The object side surface S7 paraxial region is concave, and the image side surface S8 paraxial region is concave; the object side S7 is concave in the paraxial region and the object side S8 is convex in the paraxial region. And are all aspheric surfaces.

The fifth lens element L5 has positive refractive power and is made of plastic material, and has a convex object-side surface S8 paraxial region and a convex image-side surface S10 paraxial region; the object side S8 is concave in the paraxial region and the object side S10 is convex in the paraxial region. And are all aspheric surfaces.

The sixth lens element L6 has negative refractive power and is made of plastic material. The paraxial region of the object side surface S11 is convex, and the paraxial region of the image side surface S12 is concave; the object side S11 is concave in the paraxial region and the object side S12 is convex in the paraxial region.

The ir-cut filter 110 is made of glass, and is disposed between the sixth lens element L6 and the image plane S15 without affecting the focal length of the optical imaging system.

In the optical imaging system of the first embodiment, the optical imaging system satisfies the relation: Fno/TTL is 0.31, and GTL6/ITL6 is 0.22. When Fno/TTL is 0.31, the large aperture and miniaturization design requirements of the lens system can be ensured, enough light flux is provided for shooting, and the requirement of high-image-quality and high-definition shooting is met; when GTL6/ITL6 is 0.22, the total length of the optical imaging system can be effectively reduced, and the ultra-thin design concept can be realized.

In the optical imaging system of the first embodiment, the optical imaging system satisfies the relation: TTL/DL is 1.93. When TTL/DL is 1.93, the lens can be miniaturized and the light flux required by the lens shooting can be provided, the high-quality and high-definition shooting effect can be realized,

in the optical imaging system of the first embodiment, the optical imaging system satisfies the relation: DL/Imgh is 0.75. When DL/Imgh is 0.75, the two are reasonably matched to ensure enough light flux and ensure the definition of the shot image.

In the optical imaging system of the first embodiment, the optical imaging system satisfies the relation: TTL/Imgh is 1.45. When TTL/Imgh is 1.45, both miniaturization and high-definition shooting can be achieved.

In the optical imaging system of the first embodiment, the optical imaging system satisfies the following relation: TTL/f is 1.25; when TTL/f is 1.25, optical lens miniaturization can be realized, and light can be guaranteed to better converge on an imaging surface.

In the optical imaging system of the first embodiment, the optical imaging system satisfies the relation: f/f1 is 0.82; when f/f1 is 0.82, the lens processing technology is simple, the aberration generated by the first lens is corrected with proper difficulty, and the shooting requirement can be met.

In the optical imaging system of the first embodiment, the optical imaging system satisfies the relation: (R1+ R2)/F ═ 31.33; when (R1+ R2)/F1 is 31.33, processing is facilitated, acquisition of object space light information by an optical imaging system is facilitated, and a good imaging effect can be achieved.

In the optical imaging system of the first embodiment, the optical imaging system satisfies the relation: R5/R6 ═ -0.24; when R5/R6 is-0.24, the curvature radius of the object side paraxial region and the curvature radius of the image side paraxial region of the third lens are proper, so that the incident angle can be reasonably increased to meet the requirement of an optical imaging system on image height, and meanwhile, the sensitivity of the system is reduced and the assembly stability is improved.

In the optical imaging system of the first embodiment, the optical imaging system satisfies the relation: f 3/f-1.54; when f3/f is-1.54, the focal length of the third lens element is matched with the focal length of the system to effectively reduce the total length of the system, which is favorable for the convergence of light rays on the image plane.

In the optical imaging system of the first embodiment, the optical imaging system satisfies the relation: (R7 × R8)/(R7+ R8) ═ 1.86; when (R7 × R8)/(R7+ R8) is 1.86, the curvature radius of the object-side paraxial region and the curvature radius of the image-side paraxial region of the fourth lens are appropriate, so that the spherical aberration of the optical imaging system can be reasonably corrected, the distortion aberration and astigmatism can be improved, the system sensitivity can be reduced, and the assembly stability can be improved.

In the optical imaging system of the first embodiment, the optical imaging system satisfies the relation: fno 1.8; when Fno is 1.8, the optical imaging system can have enough light input, and the electronic device can shoot high-quality night scenes, starry sky scenes and other scenes with low brightness object spaces.

Referring to fig. 1 to 4, the optical imaging system of the present embodiment satisfies the conditional expressions in tables 1 and 2 below.

TABLE 1

TABLE 2

The object side surface or the image side surface of the optical imaging system lens can be an aspheric surface, and the aspheric surface has a surface type formula as follows:

wherein Z is the distance from the corresponding point on the aspheric surface to the plane tangent to the surface vertex, r is the distance from the corresponding point on the aspheric surface to the optical axis, c is the curvature of the aspheric surface vertex (at the optical axis), k is a conic constant, and Ai is the coefficient corresponding to the i-th high-order term in the aspheric surface type formula.

Example two:

The third lens element L3 has negative refractive power and is made of plastic material. The paraxial region of the object side surface S5 is convex, and the paraxial region of the image side surface S6 is concave; the object side S5 is convex in the paraxial region and the object side S6 is concave in the paraxial region. And are all aspheric surfaces.

The fifth lens element L5 has positive refractive power and is made of plastic material, and has a convex object-side surface S8 paraxial region and a concave image-side surface S10 paraxial region; the object side S8 is concave in the paraxial region and the object side S10 is convex in the paraxial region. And are all aspheric surfaces.

In the optical imaging system of the second embodiment, the optical imaging system satisfies the relation: Fno/TTL is 0.31, and GTL6/ITL6 is 0.24. When Fno/TTL is 0.31, the large aperture and miniaturization design requirements of the lens system can be ensured, enough light flux is provided for shooting, and the requirement of high-image-quality and high-definition shooting is met; when GTL6/ITL6 is 0.24, the total length of the optical imaging system can be effectively reduced, and the ultra-thin design concept can be realized.

In the optical imaging system of the second embodiment, the optical imaging system satisfies the relation: TTL/DL is 1.88. When TTL/DL is 1.88, the lens can be miniaturized and the light flux required by the lens shooting can be provided, the high-quality and high-definition shooting effect can be realized,

in the optical imaging system of the second embodiment, the optical imaging system satisfies the relation: DL/Imgh is 0.76. When DL/Imgh is 0.76, the two are reasonably matched to ensure enough light flux and ensure the definition of the shot image.

In the optical imaging system of the second embodiment, the optical imaging system satisfies the relation: TTL/Imgh is 1.43. When TTL/Imgh is 1.43, both miniaturization and high-definition shooting can be achieved.

In the optical imaging system of the second embodiment, the optical imaging system satisfies the following relation: TTL/f is 1.26; when TTL/f is 1.26, not only can realize optical lens miniaturization, can guarantee that light gathers better on the image plane simultaneously.

In the optical imaging system of the second embodiment, the optical imaging system satisfies the relation: f/f1 is 0.80; when f/f1 is 0.80, the lens processing technology is simple, the aberration generated by the first lens is corrected with proper difficulty, and the shooting requirement can be met.

In the optical imaging system of the second embodiment, the optical imaging system satisfies the relation: (R1+ R2)/F ═ 25.81; when (R1+ R2)/F1 is 25.81, processing is facilitated, acquisition of object space light information by an optical imaging system is facilitated, and a good imaging effect can be obtained.

In the optical imaging system of the second embodiment, the optical imaging system satisfies the relation: R5/R6 ═ -0.23; when R5/R6 is-0.23, the curvature radius of the object side paraxial region and the curvature radius of the image side paraxial region of the third lens are proper, so that the incident angle can be reasonably increased to meet the requirement of an optical imaging system on image height, and meanwhile, the sensitivity of the system is reduced and the assembly stability is improved.

In the optical imaging system of the second embodiment, the optical imaging system satisfies the relation: f 3/f-1.58; when f3/f is-1.58, the focal length of the third lens element is matched with the focal length of the system to effectively reduce the total length of the system, which is beneficial to the convergence of light on the image plane.

In the optical imaging system of the second embodiment, the optical imaging system satisfies the relation: (R7 × R8)/(R7+ R8) 1.97; when (R7 × R8)/(R7+ R8) is 1.97, the curvature radius of the object-side paraxial region and the curvature radius of the image-side paraxial region of the fourth lens are appropriate, so that the spherical aberration of the optical imaging system can be reasonably corrected, the distortion aberration and astigmatism can be improved, the system sensitivity can be reduced, and the assembly stability can be improved.

In the optical imaging system of the second embodiment, the optical imaging system satisfies the relation: fno 1.8; when Fno is 1.8, the optical imaging system can have enough light input, and the electronic device can shoot high-quality night scenes, starry sky scenes and other scenes with low brightness object spaces.

Referring to fig. 5 to 8, the optical imaging system of the present embodiment satisfies the conditional expressions in tables 3 and 4 below.

TABLE 3

TABLE 4

Example three:

The fourth lens element L4 has negative refractive power and is made of plastic material. The object side surface S7 paraxial region is concave, and the image side surface S8 paraxial region is convex; the object side S7 is concave in the paraxial region and the object side S8 is convex in the paraxial region. And are all aspheric surfaces.

In the optical imaging system of the third embodiment, the optical imaging system satisfies the relation: Fno/TTL is 0.33, and GTL6/ITL6 is 0.22. When Fno/TTL is 0.33, the large aperture and miniaturization design requirements of the lens system can be ensured, enough light flux is provided for shooting, and the requirement of high-image-quality and high-definition shooting is met; when GTL6/ITL6 is 0.22, the total length of the optical imaging system can be effectively reduced, and the ultra-thin design concept can be realized.

In the optical imaging system of the third embodiment, the optical imaging system satisfies the relation: TTL/DL is 2.40. When TTL/DL is 2.40, the lens can be miniaturized and the light flux required by the lens shooting can be provided, the high-quality and high-definition shooting effect can be realized,

in the optical imaging system of the third embodiment, the optical imaging system satisfies the relation: DL/Imgh is 0.60. When DL/Imgh is 0.60, the two are reasonably matched to ensure enough light flux and ensure the definition of the shot image.

In the optical imaging system of the third embodiment, the optical imaging system satisfies the relation: TTL/Imgh is 1.43. When TTL/Imgh is 1.43, both miniaturization and high-definition shooting can be achieved.

In the optical imaging system of the third embodiment, the optical imaging system satisfies the following relation: TTL/f is 1.28; when TTL/f is 1.28, not only can realize optical lens miniaturization, can guarantee that light gathers on the image plane better simultaneously.

In the optical imaging system of the third embodiment, the optical imaging system satisfies the relation: f/f1 is 0.79; when f/f1 is 0.79, the above relation is satisfied, the lens processing technology is simple, the aberration correction difficulty generated by the first lens is appropriate, and the shooting requirement can be satisfied.

In the optical imaging system of the third embodiment, the optical imaging system satisfies the relation: (R1+ R2)/F ═ 31.59; when (R1+ R2)/F1 is 31.59, it is beneficial to processing and the optical imaging system to obtain the object space light information, and can obtain better imaging effect.

In the optical imaging system of the third embodiment, the optical imaging system satisfies the relation: R5/R6 ═ 0.23; when R5/R6 is-0.23, the curvature radius of the object side paraxial region and the curvature radius of the image side paraxial region of the third lens are proper, so that the incident angle can be reasonably increased to meet the requirement of an optical imaging system on image height, and meanwhile, the sensitivity of the system is reduced and the assembly stability is improved.

In the optical imaging system of the third embodiment, the optical imaging system satisfies the relation: f 3/f-1.62; when f3/f is-1.62, the focal length of the third lens element is matched with the focal length of the system to effectively reduce the total length of the system, which is beneficial to the convergence of light on the image plane.

In the optical imaging system of the third embodiment, the optical imaging system satisfies the relation: (R7 × R8)/(R7+ R8) ═ 2.46; when (R7 × R8)/(R7+ R8) ═ 2.46, the radius of curvature of the object-side paraxial region and the radius of curvature of the image-side paraxial region of the fourth lens are appropriate, which can reasonably correct the spherical aberration of the optical imaging system, improve the distortion aberration and astigmatism, reduce the system sensitivity, and improve the assembly stability.

In the optical imaging system of the third embodiment, the optical imaging system satisfies the relation: fno 1.88; when Fno is 1.88, the optical imaging system can have enough light input, and the electronic device can shoot high-quality night scenes, starry sky scenes and other scenes with low brightness object spaces.

Referring to fig. 9 to 12, the optical imaging system of the present embodiment satisfies the conditional expressions in tables 5 and 6 below.

TABLE 5

TABLE 6

Number of noodles	K	A4	A6	A8	A10	A12	A14	A16	A18	A20
												1	0.0011	-0.0073	-0.0242	0.0457	-0.2681	0.4965	-0.4956	0.2406	-0.0440	0.0000
2	0.0833	-0.0022	-0.0265	-0.0541	0.1039	-0.1351	0.0983	-0.0356	0.0053	0.0000
											3	-0.0050	-0.0128	0.1147	-0.3653	0.8311	-1.1042	0.8839	-0.3789	0.0657	0.0000
4	-0.0175	0.0033	0.0894	-0.1320	0.1072	-0.0651	0.0344	-0.0143	0.0033	0.0000
											5	-0.0045	-0.0057	0.0108	-0.2057	0.3165	-0.2959	0.1583	-0.0329	0.0002	0.0000
6	-0.0197	-0.0097	0.0023	-0.3759	0.9790	-1.3305	1.0393	-0.4336	0.0764	0.0000
											7	18.1243	-0.0425	0.0321	-0.0327	0.0166	-0.0058	0.0009	0.0000	0.0000	0.0000
8	-53.3917	-0.1643	0.0837	-0.0311	0.0008	0.0043	-0.0018	0.0002	0.0000	0.0000
											9	-0.3491	-0.0822	0.0261	-0.0135	0.0047	-0.0011	0.0001	0.0000	0.0000	0.0000
10	-99.0000	0.0687	-0.0523	0.0179	-0.0034	0.0002	0.0000	0.0000	0.0000	0.0000
											11	99.0000	0.2525	-1.1532	1.5368	-1.3432	0.7815	-0.2776	0.0546	-0.0046	0.0000
12	-10.6088	0.2109	-0.7041	0.8017	-0.5485	0.2366	-0.0611	0.0084	-0.0005	0.0000

Example four:

The first lens element L1 has positive refractive power and is made of plastic material. The paraxial region of the object side surface S1 is convex, and the paraxial region of the image side surface S2 is convex; the object side S1 is concave in the paraxial region and the object side S2 is convex in the paraxial region. And are all aspheric surfaces.

In the optical imaging system of the fourth embodiment, the optical imaging system satisfies the relation: Fno/TTL is 0.27, and GTL6/ITL6 is 0.23. When Fno/TTL is 0.27, the large aperture and miniaturization design requirements of the lens system can be ensured, enough light flux is provided for shooting, and the requirement of high-image-quality and high-definition shooting is met; when GTL6/ITL6 is 0.23, the total length of the optical imaging system can be effectively reduced, and the ultra-thin design concept can be realized.

In the optical imaging system of the fourth embodiment, the optical imaging system satisfies the relation: TTL/DL is 1.93. When TTL/DL is 1.93, the lens can be miniaturized and the light flux required by the lens shooting can be provided, the high-quality and high-definition shooting effect can be realized,

in the optical imaging system of the fourth embodiment, the optical imaging system satisfies the relation: DL/Imgh is 0.75. When DL/Imgh is 0.75, the two are reasonably matched to ensure enough light flux and ensure the definition of the shot image.

In the optical imaging system of the fourth embodiment, the optical imaging system satisfies the relation: TTL/Imgh is 1.45. When TTL/Imgh is 1.45, both miniaturization and high-definition shooting can be achieved.

In the optical imaging system of the fourth embodiment, the optical imaging system satisfies the following relation: TTL/f is 1.25; when TTL/f is 1.25, optical lens miniaturization can be realized, and light can be guaranteed to better converge on an imaging surface.

In the optical imaging system of the fourth embodiment, the optical imaging system satisfies the relation: f/f1 is 0.83; when f/f1 is 0.83, the lens processing technology is simple, the aberration generated by the first lens is corrected with proper difficulty, and the shooting requirement can be met.

In the optical imaging system of the fourth embodiment, the optical imaging system satisfies the relation: (R1+ R2)/F ═ 528.03; when (R1+ R2)/F1 is-528.03, the processing is facilitated, the optical imaging system is facilitated to acquire object space light information, and a good imaging effect can be achieved.

In the optical imaging system of the fourth embodiment, the optical imaging system satisfies the relation: R5/R6 ═ -0.24; when R5/R6 is 0.24, the radius of curvature of the object-side paraxial region and the radius of curvature of the image-side paraxial region of the third lens are suitable, so that the incident angle can be reasonably increased to meet the requirement of the optical imaging system on image height, and meanwhile, the sensitivity of the system is reduced, and the assembly stability is improved.

In the optical imaging system of the fourth embodiment, the optical imaging system satisfies the relation: f 3/f-1.71; when f3/f is-1.71, the ratio of the focal length of the third lens to the focal length of the system can effectively reduce the total length of the system, which is beneficial to the convergence of light on the image plane.

In the optical imaging system of the fourth embodiment, the optical imaging system satisfies the relation: (R7 × R8)/(R7+ R8) ═ 1.86; when (R7 × R8)/(R7+ R8) is 1.86, the curvature radius of the object-side paraxial region and the curvature radius of the image-side paraxial region of the fourth lens are appropriate, so that the spherical aberration of the optical imaging system can be reasonably corrected, the distortion aberration and astigmatism can be improved, the system sensitivity can be reduced, and the assembly stability can be improved.

In the optical imaging system of the fourth embodiment, the optical imaging system satisfies the relation: fno 1.55; when Fno is 1.55, the optical imaging system can have enough light input, and the electronic device can shoot high-quality night scenes, starry sky scenes and other scenes with low brightness object spaces.

Referring to fig. 13 to 16, the optical imaging system of the present embodiment satisfies the conditional expressions in table 7 and table 8 below.

TABLE 7

TABLE 8

Example five:

The first lens element L1 has positive refractive power and is made of plastic material. The paraxial region of the object side surface S1 is convex, and the paraxial region of the image side surface S2 is concave; the object side S1 is convex in the paraxial region and the object side S2 is concave in the paraxial region. And are all aspheric surfaces.

The second lens element L2 has positive refractive power and is made of plastic material. The object side surface S3 paraxial region is concave, and the image side surface S4 paraxial region is convex; the object side S3 is convex in the paraxial region and the object side S4 is concave in the paraxial region. And are all aspheric surfaces.

The fourth lens element L4 has negative refractive power and is made of plastic material. The object side surface S7 paraxial region is concave, and the image side surface S8 paraxial region is concave; the object side S7 is convex in the paraxial region and the object side S8 is concave in the paraxial region. And are all aspheric surfaces.

The fifth lens element L5 has positive refractive power and is made of plastic material, and has a convex object-side surface S8 paraxial region and a convex image-side surface S10 paraxial region; the object side S8 is convex in the paraxial region and the object side S10 is concave in the paraxial region. And are all aspheric surfaces.

The sixth lens element L6 has negative refractive power and is made of plastic material. The paraxial region of the object side surface S11 is convex, and the paraxial region of the image side surface S12 is concave; the object side S11 is convex in the paraxial region and the object side S12 is concave in the paraxial region.

In the optical imaging system of the fifth embodiment, the optical imaging system satisfies the relation: Fno/TTL is 0.28, and GTL6/ITL6 is 0.23. When Fno/TTL is 0.28, the large aperture and miniaturization design requirements of the lens system can be ensured, enough light flux is provided for shooting, and the requirement of high-image-quality and high-definition shooting is met; when GTL6/ITL6 is 0.23, the total length of the optical imaging system can be effectively reduced, and the ultra-thin design concept can be realized.

In the optical imaging system of the fifth embodiment, the optical imaging system satisfies the relation: TTL/DL is 2.05. When TTL/DL is 2.05, the lens can be miniaturized and the light flux required by the lens shooting can be provided, the high-quality and high-definition shooting effect can be realized,

in the optical imaging system of the fifth embodiment, the optical imaging system satisfies the relation: DL/Imgh is 0.71. When DL/Imgh is 0.71, the two are reasonably matched to ensure enough light flux and the definition of the shot image.

In the optical imaging system of the fifth embodiment, the optical imaging system satisfies the relation: TTL/Imgh is 1.45. When TTL/Imgh is 1.45, both miniaturization and high-definition shooting can be achieved.

In the optical imaging system of the fifth embodiment, the optical imaging system satisfies the following relation: TTL/f is 1.24; when TTL/f is 1.24, not only can realize optical lens miniaturization, can guarantee that light gathers on the image plane better simultaneously.

In the optical imaging system of the fifth embodiment, the optical imaging system satisfies the relation: f/f1 is 0.82; when f/f1 is 0.82, the lens processing technology is simple, the aberration generated by the first lens is corrected with proper difficulty, and the shooting requirement can be met.

In the optical imaging system of the fifth embodiment, the optical imaging system satisfies the relation: (R1+ R2)/F34.94; when (R1+ R2)/F1 is 34.94, the processing is facilitated, the optical imaging system is facilitated to acquire object space light information, and a good imaging effect can be achieved.

In the optical imaging system of the fifth embodiment, the optical imaging system satisfies the relation: R5/R6 ═ -0.24; when R5/R6 is equal, the curvature radius of the object side paraxial region and the curvature radius of the image side paraxial region of the third lens are proper, so that the incident angle can be reasonably increased to meet the requirement of the optical imaging system on image height, and meanwhile, the sensitivity of the system is reduced and the assembly stability is improved.

In the optical imaging system of the fifth embodiment, the optical imaging system satisfies the relation: f 3/f-1.51; when f3/f is equal, the focal length of the third lens element is matched with the focal length of the system to effectively reduce the total length of the system, which is favorable for the convergence of light rays on the image plane.

In the optical imaging system of the fifth embodiment, the optical imaging system satisfies the relation: (R7 × R8)/(R7+ R8) ═ 1.87; when (R7 × R8)/(R7+ R8) is 1.87, the curvature radius of the object-side paraxial region and the curvature radius of the image-side paraxial region of the fourth lens are appropriate, so that the spherical aberration of the optical imaging system can be reasonably corrected, the distortion aberration and astigmatism can be improved, the system sensitivity can be reduced, and the assembly stability can be improved.

In the optical imaging system of the fifth embodiment, the optical imaging system satisfies the relation: fno 1.65; when Fno is 1.65, the optical imaging system can have enough light input, and the electronic device can shoot high-quality night scenes, starry sky scenes and other scenes with low brightness object spaces.

Referring to fig. 17 to 20, the optical imaging system of the present embodiment satisfies the conditional expressions in tables 9 and 10 below.

TABLE 9

Watch 10

Number of noodles	K	A4	A6	A8	A10	A12	A14	A16	A18	A20
											1	-0.0008	0.0000	-0.0072	-0.0242	0.0457	-0.2681	0.4965	-0.4956	0.2406	-0.0440
2	17.7088	0.0000	-0.0023	-0.0265	-0.0541	0.1039	-0.1351	0.0983	-0.0356	0.0053
											3	16.5391	0.0000	-0.0127	0.1148	-0.3653	0.8311	-1.1042	0.8839	-0.3789	0.0657
4	-0.0021	0.0000	0.0032	0.0894	-0.1320	0.1072	-0.0652	0.0344	-0.0143	0.0033
											5	-0.0136	0.0000	-0.0056	0.0108	-0.2057	0.3165	-0.2959	0.1583	-0.0329	0.0002
6	0.0004	0.0000	-0.0095	0.0025	-0.3758	0.9790	-1.3305	1.0393	-0.4336	0.0764
											7	-0.0835	0.0000	-0.0406	0.0324	-0.0327	0.0166	-0.0058	0.0009	0.0000	0.0000
8	-0.0213	0.0000	-0.1660	0.0835	-0.0311	0.0008	0.0043	-0.0018	0.0002	0.0000
											9	-0.4366	0.0000	-0.0837	0.0258	-0.0135	0.0047	-0.0011	0.0001	0.0000	0.0000
10	-41.4554	0.0000	0.0688	-0.0523	0.0179	-0.0034	0.0002	0.0000	0.0000	0.0000
											11	41.3692	0.0000	0.2520	-1.1534	1.5367	-1.3433	0.7815	-0.2776	0.0546	-0.0046
12	-12.8514	0.0000	0.2165	-0.7025	0.8017	-0.5486	0.2366	-0.0611	0.0084	-0.0005

Example six:

The sixth lens element L6 has negative refractive power and is made of plastic material. The object side surface S11 paraxial region is concave, and the image side surface S12 paraxial region is concave; the object side S11 is concave in the paraxial region and the object side S12 is convex in the paraxial region.

In the optical imaging system of the sixth embodiment, the optical imaging system satisfies the relation: Fno/TTL is 0.27, and GTL6/ITL6 is 0.23. When Fno/TTL is 0.27, the large aperture and miniaturization design requirements of the lens system can be ensured, enough light flux is provided for shooting, and the requirement of high-image-quality and high-definition shooting is met; when GTL6/ITL6 is 0.23, the total length of the optical imaging system can be effectively reduced, and the ultra-thin design concept can be realized.

In the optical imaging system of the sixth embodiment, the optical imaging system satisfies the relation: TTL/DL is 1.90. When TTL/DL is 1.90, the lens can be miniaturized and the light flux required by the lens shooting can be provided, the high-quality and high-definition shooting effect can be realized,

in the optical imaging system of the sixth embodiment, the optical imaging system satisfies the relation: DL/Imgh is 0.76. When DL/Imgh is 0.76, the two are reasonably matched to ensure enough light flux and ensure the definition of the shot image.

In the optical imaging system of the sixth embodiment, the optical imaging system satisfies the relation: TTL/Imgh is 1.45. When TTL/Imgh is 1.45, both miniaturization and high-definition shooting can be achieved.

In the optical imaging system of the sixth embodiment, the optical imaging system satisfies the following relation: TTL/f is 1.22; when TTL/f is 1.22, not only can realize optical lens miniaturization, can guarantee that light gathers on the image plane better simultaneously.

In the optical imaging system of the sixth embodiment, the optical imaging system satisfies the relation: f/f1 is 0.83; when f/f1 is 0.83, the lens processing technology is simple, the aberration generated by the first lens is corrected with proper difficulty, and the shooting requirement can be met.

In the optical imaging system of the sixth embodiment, the optical imaging system satisfies the relation: (R1+ R2)/F41.06; when (R1+ R2)/F1 is 41.06, the processing is facilitated, the optical imaging system is facilitated to acquire object space light information, and a good imaging effect can be achieved.

In the optical imaging system of the sixth embodiment, the optical imaging system satisfies the relation: R5/R6 ═ -0.25; when R5/R6 is-0.25, the curvature radius of the object side paraxial region and the curvature radius of the image side paraxial region of the third lens are proper, so that the incident angle can be reasonably increased to meet the requirement of an optical imaging system on image height, and meanwhile, the sensitivity of the system is reduced and the assembly stability is improved.

In the optical imaging system of the sixth embodiment, the optical imaging system satisfies the relation: f 3/f-1.48; when f3/f is-1.48, the focal length of the third lens element is matched with the focal length of the system to effectively reduce the total length of the system, which is beneficial to the convergence of light on the image plane.

In the optical imaging system of the sixth embodiment, the optical imaging system satisfies the relation: (R7 × R8)/(R7+ R8) 1.88; when (R7 × R8)/(R7+ R8) is 1.88, the curvature radius of the object-side paraxial region and the curvature radius of the image-side paraxial region of the fourth lens are appropriate, so that the spherical aberration of the optical imaging system can be reasonably corrected, the distortion aberration and astigmatism can be improved, the system sensitivity can be reduced, and the assembly stability can be improved.

In the optical imaging system of the sixth embodiment, the optical imaging system satisfies the relation: fno 1.55; when Fno is 1.55, the optical imaging system can have enough light input, and the electronic device can shoot high-quality night scenes, starry sky scenes and other scenes with low brightness object spaces.

Referring to fig. 21 to 24, the optical imaging system of the present embodiment satisfies the conditional expressions in tables 11 and 12 below.

TABLE 11

TABLE 12

Example seven:

In the optical imaging system of the seventh embodiment, the optical imaging system satisfies the relation: Fno/TTL is 0.25, and GTL6/ITL6 is 0.22. When Fno/TTL is 0.25, the large aperture and miniaturization design requirements of the lens system can be ensured, enough light flux is provided for shooting, and the requirement of high-image-quality and high-definition shooting is met; when GTL6/ITL6 is 0.22, the total length of the optical imaging system can be effectively reduced, and the ultra-thin design concept can be realized.

In the optical imaging system of the seventh embodiment, the optical imaging system satisfies the relation: TTL/DL is 1.91. When TTL/DL is 1.91, the lens can be miniaturized and the light flux required by the lens shooting can be provided, the high-quality and high-definition shooting effect can be realized,

in the optical imaging system of the seventh embodiment, the optical imaging system satisfies the relation: DL/Imgh is 0.75. When DL/Imgh is 0.75, the two are reasonably matched to ensure enough light flux and ensure the definition of the shot image.

In the optical imaging system of the seventh embodiment, the optical imaging system satisfies the relation: TTL/Imgh is 1.44. When TTL/Imgh is 1.44, both miniaturization and high-definition shooting can be achieved.

In the optical imaging system of the seventh embodiment, the optical imaging system satisfies the following relation: TTL/f is 1.28; when TTL/f is 1.28, not only can realize optical lens miniaturization, can guarantee that light gathers on the image plane better simultaneously.

In the optical imaging system of the seventh embodiment, the optical imaging system satisfies the relation: f/f1 is 0.77; when f/f1 is 0.77, the lens processing technology is simple, the aberration generated by the first lens is corrected with proper difficulty, and the shooting requirement can be met.

In the optical imaging system of the seventh embodiment, the optical imaging system satisfies the relation: (R1+ R2)/F ═ 7.94; when (R1+ R2)/F1 is 7.94, the processing is facilitated, the optical imaging system is facilitated to acquire object space light information, and a good imaging effect can be obtained.

In the optical imaging system of the seventh embodiment, the optical imaging system satisfies the relation: R5/R6 ═ -0.23; when R5/R6 is-0.23, the curvature radius of the object side paraxial region and the curvature radius of the image side paraxial region of the third lens are proper, so that the incident angle can be reasonably increased to meet the requirement of an optical imaging system on image height, and meanwhile, the sensitivity of the system is reduced and the assembly stability is improved.

In the optical imaging system of the seventh embodiment, the optical imaging system satisfies the relation: f 3/f-1.41; when f3/f is-1.41, the focal length of the third lens element is matched with the focal length of the system to effectively reduce the total length of the system, which is favorable for the convergence of light rays on the image plane.

In the optical imaging system of the seventh embodiment, the optical imaging system satisfies the relation: (R7 × R8)/(R7+ R8) 1.91; when (R7 × R8)/(R7+ R8) is 1.91, the curvature radius of the object-side paraxial region and the curvature radius of the image-side paraxial region of the fourth lens are appropriate, so that the spherical aberration of the optical imaging system can be reasonably corrected, the distortion aberration and astigmatism can be improved, the system sensitivity can be reduced, and the assembly stability can be improved.

In the optical imaging system of the seventh embodiment, the optical imaging system satisfies the relation: fno 1.45; when Fno is 1.45, the optical imaging system can have enough light input, and the electronic device can shoot high-quality night scenes, starry sky scenes and other scenes with low brightness object spaces.

Referring to fig. 25 to 28, the optical imaging system of the present embodiment satisfies the conditional expressions in tables 13 and 14 below.

Watch 13

TABLE 14

An image capturing apparatus according to an embodiment of a second aspect of the present invention includes: the optical imaging system and the electronic photosensitive element are arranged on an imaging surface of the optical imaging system, and images formed by the optical imaging system can be collected and transmitted to the image capturing device through the electronic sensing element through the integrated arrangement of the optical imaging system and the electronic photosensitive element, so that the image capturing of the image capturing device is realized.

An electronic device according to an embodiment of the second aspect of the present invention includes: the shell with get for instance the device, the shell is provided with the mounting hole, get for instance the device and set up in the shell and can acquire the image, through set up the mounting hole on electronic equipment and get for instance the device, can make electronic equipment realize the acquireing to the image.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example.

While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. An optical imaging system, comprising, in order from an object side to an image side:

the optical imaging system satisfies the relation:

Fno/TTL<0.4；

0.2<GTL6/ITL6<0.3；

wherein Fno is an f-number of the optical lens assembly, TTL is a distance on the optical axis from the object-side surface of the first lens element to the image plane, GTL6 is a shortest distance from the object-side surface of the sixth lens element to the image-side surface of the sixth lens element, and ITL6 is a longest distance from the object-side surface of the sixth lens element to the image-side surface of the sixth lens element, the distance being parallel to the optical axis.

2. The optical imaging system of claim 1, further satisfying the relationship:

1.5<TTL/DL<3.0；

wherein DL is the diaphragm aperture diameter of the optical imaging system.

3. The optical imaging system of claim 1, further satisfying the relationship:

0.5<DL/Imgh<0.8；

DL is the diameter of the diaphragm aperture of the optical imaging system, and Imgh is half of the diagonal length of the effective pixel area on the imaging surface of the optical imaging system.

4. The optical imaging system of claim 1, further satisfying the relationship:

TTL/Imgh<1.5；

wherein Imgh is half of the diagonal length of the effective pixel area on the imaging surface of the optical imaging system.

5. The optical imaging system of claim 1, further satisfying the relationship:

0.3<GTL5/ITL5<0.6；

the GTL5 is the shortest distance from the object side surface to the image side surface of the fifth lens parallel to the optical axis, and the ITL5 is the longest distance from the object side surface to the image side surface of the fifth lens parallel to the optical axis.

6. The optical imaging system of claim 1, further satisfying the relationship:

1.0<TTL/f<2.0；

wherein f is the effective focal length of the optical imaging system.

7. The optical imaging system of claim 1, further satisfying the relationship:

0.6<f/f1<1；

wherein f1 is the optical effective focal length of the first lens, and f is the effective focal length of the optical imaging system.

8. The optical imaging system of claim 1, further satisfying the relationship:

-600<(R1+R2)/F1<50；

wherein R1 is the curvature radius of the object side paraxial region of the first lens, R2 is the curvature radius of the image side paraxial region of the first lens, and f1 is the optical effective focal length of the first lens.

9. The optical imaging system of claim 1, further satisfying the relationship:

-0.3<R5/R6<-0.2；

wherein R5 is the third lens object side paraxial region radius of curvature, and R6 is the third lens image side paraxial region radius of curvature.

10. The optical imaging system of claim 1,

-1.8<f3/f<-1；

wherein f3 is the optical effective focal length of the third lens, and f is the effective focal length of the optical imaging system.

11. The optical imaging system of claim 1, further satisfying the relationship:

1<(R7*R8)/(R7+R8)<3；

wherein R7 is the curvature radius of the object side paraxial region of the fourth lens, and R8 is the curvature radius of the image side paraxial region of the fourth lens.

12. The optical imaging system of claim 1, wherein Fno <2.

13. An image capturing apparatus, comprising:

the optical imaging system of any one of claims 1-12;

and the electronic sensing element is arranged on the image side of the optical imaging system.

14. An electronic device, comprising:

a housing provided with a mounting hole;

the image capturing device as claimed in claim 13, wherein the image capturing device is disposed on the housing and is capable of capturing images.