CN109375348A

CN109375348A - Optical imaging system

Info

Publication number: CN109375348A
Application number: CN201811579987.1A
Authority: CN
Inventors: 贺凌波; 张锐; 戴付建; 赵烈烽
Original assignee: Zhejiang Sunny Optics Co Ltd
Current assignee: Zhejiang Sunny Optics Co Ltd
Priority date: 2018-12-24
Filing date: 2018-12-24
Publication date: 2019-02-22

Abstract

This application discloses a kind of optical imaging system, which sequentially includes: the first lens, the second lens, the third lens, the 4th lens, the 5th lens and the 6th lens with focal power by object side to image side along optical axis.Wherein, the first lens have negative power, and object side is convex surface, and image side surface is concave surface；4th lens have positive light coke；At least one lens of first lens into the 6th lens have non-rotationally-symmetric aspherical；And the effective focal length fy of the Y direction of the effective focal length fx and optical imaging system of the X-direction of optical imaging system meets 0.5 < fx/fy < 1.5.

Description

Optical imaging system

Technical field

This application involves a kind of optical imaging systems, more particularly, to a kind of optical imagery system including six-element lens System.

Background technique

In recent years, with the fast development of three dimensional depth identification technology, TOF technology also starts standby in three-dimensional detection field Favored by user.TOF technology, also referred to as Time of Flight (flight time), refer to (past by the flight of detecting optical pulses Return) time realize target object positioning a kind of technology.Different from traditional single-point laser ranging, TOF technology uses array Detector, the three-dimensional spatial information of whole object can be obtained simultaneously.In general, camera lens of the configuration in TOF camera needs Have the characteristics that object lens of large relative aperture, small chief ray incidence angles (CRA).

The optical imaging system for being currently applied to TOF camera mostly uses six slice structures, however, its eyeglass face type is mostly Symmetrically (axial symmetry) it is aspherical.The aspherical curve that can be regarded as in meridional plane of this kind of rotational symmetry around 360 ° of optical axis rotation and formed, therefore its only in meridional plane have sufficient freedom degree, can not well to axis outside Aberration is corrected.

Summary of the invention

This application provides be applicable to portable electronic product, can at least solve or part solve it is in the prior art The optical imaging system of at least one above-mentioned disadvantage, such as the optical imaging system suitable for TOF camera.

On the one hand, this application provides such a optical imaging systems, and the optical imaging system is along optical axis by object side It sequentially include first lens with focal power, the second lens, the third lens, the 4th lens, the 5th lens and the 6th to image side Lens.Wherein, the first lens can have negative power, and object side can be convex surface, and image side surface can be concave surface；4th lens can have There is positive light coke；At least one lens of first lens into the 6th lens can have non-rotationally-symmetric aspherical.Wherein, light The effective focal length fy for learning the effective focal length fx of the X-direction of imaging system and the Y direction of optical imaging system can meet 0.5 < Fx/fy < 1.5.

In one embodiment, the effective focal length f1 of the first lens and the effective focal length f2 of the second lens can meet 0.5 < f1/f2 < 2.0.

In one embodiment, the X-direction of the radius of curvature R 2 of the image side surface of the first lens and optical imaging system Effective focal length fx can meet 1.5 < R2/fx < 3.5.

In one embodiment, the X-direction of the radius of curvature R 4 of the image side surface of the second lens and optical imaging system Effective focal length fx can meet 0.5 < R4/fx < 3.5.

In one embodiment, the X-direction of the radius of curvature R 9 of the object side of the 5th lens and optical imaging system Effective focal length fx can meet 1.5 < R9/fx < 3.5.

In one embodiment, center thickness CT5 and sixth lens of the 5th lens on optical axis on optical axis in Heart thickness CT6 can meet 2.5 < CT5/CT6 < 4.5.

In one embodiment, center thickness CT4 and the third lens of the 4th lens on optical axis on optical axis in Heart thickness CT3 can meet 1.5 < CT4/CT3 < 3.

In one embodiment, spacing distance T12 on optical axis of the first lens and the second lens, the third lens and Spacing distance T34, fiveth lens and sixth lens spacing distance T56 and first lens on optical axis of four lens on optical axis Distance TTL of the imaging surface on optical axis of object side to optical imaging system can meet 0≤(T12+T34+T56)/TTL < 0.5。

In one embodiment, the maximum angle of half field-of view Semi-FOV of optical imaging system can meet Semi-FOV > 80°。

In one embodiment, the F-number Fno of optical imaging system can meet Fno < 1.5.

In one embodiment, the service band of optical imaging system can be 900nm to 1000nm.

On the other hand, this application provides such a optical imaging systems, and the optical imaging system is along optical axis by object Side to image side sequentially includes first lens with focal power, the second lens, the third lens, the 4th lens, the 5th lens and Six lens.Wherein, the first lens can have negative power, and object side can be convex surface, and image side surface can be concave surface；Second lens can With negative power；4th lens can have positive light coke；At least one lens of first lens into the 6th lens can have It is non-rotationally-symmetric aspherical.Wherein, the effective focal length f1 of the first lens and the effective focal length f2 of the second lens can meet 0.5 < F1/f2 < 2.0.

Another aspect, this application provides such a optical imaging systems, and the optical imaging system is along optical axis by object Side to image side sequentially includes first lens with focal power, the second lens, the third lens, the 4th lens, the 5th lens and Six lens.Wherein, the first lens can have negative power, and object side can be convex surface, and image side surface can be concave surface；4th lens can With positive light coke；At least one lens of first lens into the 6th lens can have non-rotationally-symmetric aspherical.Wherein, The effective focal length fx of the X-direction of the radius of curvature R 2 and optical imaging system of the image side surface of first lens can meet 1.5 < R2/ Fx < 3.5.

Another aspect, this application provides such a optical imaging systems, and the optical imaging system is along optical axis by object Side to image side sequentially includes first lens with focal power, the second lens, the third lens, the 4th lens, the 5th lens and Six lens.Wherein, the first lens can have negative power, and object side can be convex surface, and image side surface can be concave surface；4th lens can With positive light coke；At least one lens of first lens into the 6th lens can have non-rotationally-symmetric aspherical.Wherein, The effective focal length fx of the X-direction of the radius of curvature R 4 and optical imaging system of the image side surface of second lens can meet 0.5 < R4/ Fx < 3.5.

Another aspect, this application provides such a optical imaging systems, and the optical imaging system is along optical axis by object Side to image side sequentially includes first lens with focal power, the second lens, the third lens, the 4th lens, the 5th lens and Six lens.Wherein, the first lens can have negative power, and object side can be convex surface, and image side surface can be concave surface；4th lens can With positive light coke；At least one lens of first lens into the 6th lens can have non-rotationally-symmetric aspherical.Wherein, The effective focal length fx of the X-direction of the radius of curvature R 9 and optical imaging system of the object side of 5th lens can meet 1.5 < R9/ Fx < 3.5.

Another aspect, this application provides such a optical imaging systems, and the optical imaging system is along optical axis by object Side to image side sequentially includes first lens with focal power, the second lens, the third lens, the 4th lens, the 5th lens and Six lens.Wherein, the first lens can have negative power, and object side can be convex surface, and image side surface can be concave surface；4th lens can With positive light coke；At least one lens of first lens into the 6th lens can have non-rotationally-symmetric aspherical.Wherein, Center thickness CT5 and sixth lens center thickness CT6 on optical axis of 5th lens on optical axis can meet 2.5 < CT5/ CT6 < 4.5.

Another aspect, this application provides such a optical imaging systems, and the optical imaging system is along optical axis by object Side to image side sequentially includes first lens with focal power, the second lens, the third lens, the 4th lens, the 5th lens and Six lens.Wherein, the first lens can have negative power, and object side can be convex surface, and image side surface can be concave surface；4th lens can With positive light coke；At least one lens of first lens into the 6th lens can have non-rotationally-symmetric aspherical.Wherein, Center thickness CT3 of center thickness CT4 and the third lens of 4th lens on optical axis on optical axis can meet 1.5 < CT4/ CT3 < 3.

Another aspect, this application provides such a optical imaging systems, and the optical imaging system is along optical axis by object Side to image side sequentially includes first lens with focal power, the second lens, the third lens, the 4th lens, the 5th lens and Six lens.Wherein, the first lens can have negative power, and object side can be convex surface, and image side surface can be concave surface；4th lens can With positive light coke；At least one lens of first lens into the 6th lens can have non-rotationally-symmetric aspherical.Wherein, The spacing distance of spacing distance T12, the third lens and the 4th lens on optical axis of first lens and the second lens on optical axis The object side of the spacing distance T56 and the first lens of T34, the 5th lens and the 6th lens on optical axis are to optical imaging system Distance TTL of the imaging surface on optical axis can meet 0≤(T12+T34+T56)/TTL < 0.5.

Another aspect, this application provides such a optical imaging systems, and the optical imaging system is along optical axis by object Side to image side sequentially includes first lens with focal power, the second lens, the third lens, the 4th lens, the 5th lens and Six lens.Wherein, the first lens can have negative power, and object side can be convex surface, and image side surface can be concave surface；4th lens can With positive light coke；At least one lens of first lens into the 6th lens can have non-rotationally-symmetric aspherical.Wherein, The maximum angle of half field-of view Semi-FOV of optical imaging system can meet 80 ° of Semi-FOV >.

Another aspect, this application provides such a optical imaging systems, and the optical imaging system is along optical axis by object Side to image side sequentially includes first lens with focal power, the second lens, the third lens, the 4th lens, the 5th lens and Six lens.Wherein, the first lens can have negative power, and object side can be convex surface, and image side surface can be concave surface；4th lens can With positive light coke；At least one lens of first lens into the 6th lens can have non-rotationally-symmetric aspherical.Wherein, The F-number Fno of optical imaging system can meet Fno < 1.5.

Another aspect, this application provides such a optical imaging systems, and the optical imaging system is along optical axis by object Side to image side sequentially includes first lens with focal power, the second lens, the third lens, the 4th lens, the 5th lens and Six lens.Wherein, the first lens can have negative power, and object side can be convex surface, and image side surface can be concave surface；4th lens can With positive light coke；At least one lens of first lens into the 6th lens can have non-rotationally-symmetric aspherical.Wherein, The service band of optical imaging system can be 900nm to 1000nm.

The application uses multi-disc (for example, six) lens, by each power of lens of reasonable distribution, face type, each Spacing etc. on axis between the center thickness of mirror and each lens, so that above-mentioned optical imaging system has big field angle, macropore At least one beneficial effect such as diameter and high pixel.In addition, it is non-rotationally-symmetric aspherical by introducing, to optical imaging system The outer meridian aberration of axis and sagitta of arc aberration are corrected simultaneously, to further obtain the promotion of image quality.

Detailed description of the invention

In conjunction with attached drawing, by the detailed description of following non-limiting embodiment, other features of the application, purpose and excellent Point will be apparent.In the accompanying drawings:

Fig. 1 shows the structural schematic diagram of the optical imaging system according to the embodiment of the present application 1；

Fig. 2 diagrammatically illustrates situation of the RMS spot diameter of the optical imaging system of embodiment 1 in first quartile；

Fig. 3 shows the structural schematic diagram of the optical imaging system according to the embodiment of the present application 2；

Fig. 4 diagrammatically illustrates situation of the RMS spot diameter of the optical imaging system of embodiment 2 in first quartile；

Fig. 5 shows the structural schematic diagram of the optical imaging system according to the embodiment of the present application 3；

Fig. 6 diagrammatically illustrates situation of the RMS spot diameter of the optical imaging system of embodiment 3 in first quartile；

Fig. 7 shows the structural schematic diagram of the optical imaging system according to the embodiment of the present application 4；

Fig. 8 diagrammatically illustrates situation of the RMS spot diameter of the optical imaging system of embodiment 4 in first quartile；

Fig. 9 shows the structural schematic diagram of the optical imaging system according to the embodiment of the present application 5；

Figure 10 diagrammatically illustrates situation of the RMS spot diameter of the optical imaging system of embodiment 5 in first quartile；

Figure 11 shows the structural schematic diagram of the optical imaging system according to the embodiment of the present application 6；

Figure 12 diagrammatically illustrates situation of the RMS spot diameter of the optical imaging system of embodiment 6 in first quartile；

Figure 13 shows the structural schematic diagram of the optical imaging system according to the embodiment of the present application 7；

Figure 14 diagrammatically illustrates situation of the RMS spot diameter of the optical imaging system of embodiment 7 in first quartile；

Figure 15 shows the structural schematic diagram of the optical imaging system according to the embodiment of the present application 8；

Figure 16 diagrammatically illustrates situation of the RMS spot diameter of the optical imaging system of embodiment 8 in first quartile；

Figure 17 shows the structural schematic diagrams according to the optical imaging system of the embodiment of the present application 9；

Figure 18 diagrammatically illustrates situation of the RMS spot diameter of the optical imaging system of embodiment 9 in first quartile；

Figure 19 shows the structural schematic diagram of the optical imaging system according to the embodiment of the present application 10；

Figure 20 diagrammatically illustrates feelings of the RMS spot diameter of the optical imaging system of embodiment 10 in first quartile Condition.

Specific embodiment

Various aspects of the reference attached drawing to the application are made more detailed description by the application in order to better understand.It answers Understand, the only description to the illustrative embodiments of the application is described in detail in these, rather than limits the application in any way Range.In the specification, the identical element of identical reference numbers.Stating "and/or" includes associated institute Any and all combinations of one or more of list of items.

It should be noted that in the present specification, first, second, third, etc. statement is only used for a feature and another spy Sign distinguishes, without indicating any restrictions to feature.Therefore, without departing substantially from teachings of the present application, hereinafter The first lens discussed are also known as the second lens or the third lens.

In the accompanying drawings, for ease of description, thickness, the size and shape of lens are slightly exaggerated.Specifically, attached drawing Shown in spherical surface or aspherical shape be illustrated by way of example.That is, spherical surface or aspherical shape are not limited to attached drawing Shown in spherical surface or aspherical shape.Attached drawing is merely illustrative and and non-critical drawn to scale.

Herein, near axis area refers to the region near optical axis.If lens surface is convex surface and does not define convex surface position When setting, then it represents that the lens surface is convex surface near axis area is less than；If lens surface is concave surface and does not define the concave surface position When, then it represents that the lens surface is concave surface near axis area is less than.In each lens, it is known as this thoroughly near the surface of object The object side of mirror；In each lens, the image side surface of the lens is known as near the surface of imaging surface.

Herein, it is Z-direction that we, which define and are parallel to the direction of optical axis, vertical with Z axis and in the meridional plane Direction be Y direction, it is vertical with Z axis and be located at sagittal plane in direction be X-direction.Herein, unless otherwise saying Bright, otherwise each mark of reference (for example, radius of curvature) herein indicates the feature ginseng of the Y direction along optical imaging system Magnitude.For example, in case of no particular description, conditional " R9/fx " indicates the Y direction of the object side of the 5th lens The ratio of the effective focal length fx of radius of curvature R 9 and the X-direction of optical imaging system.

It will also be appreciated that term " comprising ", " including ", " having ", "comprising" and/or " including ", when in this theory It indicates there is stated feature, element and/or component when using in bright book, but does not preclude the presence or addition of one or more Other feature, component, assembly unit and/or their combination.In addition, ought the statement of such as at least one of " ... " appear in institute When after the list of column feature, entire listed feature is modified, rather than modifies the individual component in list.In addition, when describing this When the embodiment of application, " one or more embodiments of the application " are indicated using "available".Also, term " illustrative " It is intended to refer to example or illustration.

Unless otherwise defined, otherwise all terms (including technical terms and scientific words) used herein all have with The application one skilled in the art's is generally understood identical meaning.It will also be appreciated that term (such as in everyday words Term defined in allusion quotation) it should be interpreted as having and their consistent meanings of meaning in the context of the relevant technologies, and It will not be explained with idealization or excessively formal sense, unless clear herein so limit.

It should be noted that in the absence of conflict, the features in the embodiments and the embodiments of the present application can phase Mutually combination.The application is described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

The feature of the application, principle and other aspects are described in detail below.

Optical imaging system according to the application illustrative embodiments may include such as six lens with focal power, That is, the first lens, the second lens, the third lens, the 4th lens, the 5th lens and the 6th lens.This six-element lens is along optical axis By object side to image side sequential, can have airspace between each adjacent lens.

In the exemplary embodiment, the first lens can have negative power, and object side can be convex surface, and image side surface can be Concave surface；Second lens have positive light coke or negative power；The third lens have positive light coke or negative power；4th lens can With positive light coke；5th lens have positive light coke or negative power；6th lens have positive light coke or negative power.It closes Reason the first power of lens of design and face type, it is ensured that the first lens have good machinability, and are conducive to make optics Imaging system has the advantage of big field angle, while being conducive to reduce the incidence angle on chief ray incident to imaging surface, improves picture The relative illumination in face；Rationally design the 4th power of lens, be conducive to correct optical imaging system off-axis aberration, improve at Image quality amount.

Furthermore, it is possible to object side and/or image side surface by least one lens by the first lens into the 6th lens It is set as non-rotationally-symmetric aspherical, further to promote image quality.It is non-rotationally-symmetric it is aspherical be a kind of free form surface, Rotational symmetry it is aspherical on the basis of, increase non-rotational symmetry component, thus introduce in lens system non-rotationally-symmetric It is aspherical to be conducive to by being effectively corrected to meridian aberration outside axis and sagitta of arc aberration, the greatly property of improving optical system Energy.Optionally, the object side of the 6th lens and/or image side surface can be non-rotationally-symmetric aspherical.

In the exemplary embodiment, the second lens can have negative power, and image side surface can be concave surface.

In the exemplary embodiment, the image side surface of the third lens can be convex surface.

In the exemplary embodiment, the object side of the 5th lens can be convex surface.

In the exemplary embodiment, the service band of optical imaging system can be about 900nm to about 1000nm, so that root Near infrared band can be preferably applied to according to the optical imaging system of the application.

In the exemplary embodiment, the optical imaging system of the application can meet 0.5 < fx/fy < 1.5 of conditional, In, fx is the effective focal length of the X-direction of optical imaging system, and fy is the effective focal length of the Y direction of optical imaging system.More Specifically, fx and fy can further meet 0.81≤fx/fy≤1.25.The focal length ratio of reasonable disposition X-axis, Y direction, favorably In promoting the freedom degree of free form surface in two directions, optimize correcting of the optical imaging system for off-axis aberration；Together When, be conducive to the aberration of optical imaging system and parameters control in an appropriate range, finally obtain high-quality The image of amount.

In the exemplary embodiment, the optical imaging system of the application can meet 0.5 < f1/f2 < 2.0 of conditional, In, f1 is the effective focal length of the first lens, and f2 is the effective focal length of the second lens.More specifically, f1 and f2 can further meet 0.66≤f1/f2≤1.84.The first lens of reasonable disposition and the second power of lens are conducive to share the big visual field of object space and rectify Off-axis aberration caused by positive back lens, to improve the image quality of camera lens.

In the exemplary embodiment, the optical imaging system of the application can meet 1.5 < R2/fx < 3.5 of conditional, In, R2 is the radius of curvature of the image side surface of the first lens, and fx is the effective focal length of the X-direction of optical imaging system.More specifically Ground, R2 and fx can further meet 1.6 < R2/fx < 3.3, such as 1.70≤R2/fx≤3.14.Rationally control the first lens The ratio of the effective focal length of the radius of curvature and X-direction of image side surface, can be effectively controlled the curvature of the image side surface of the first lens, makes The curvature of field contribution amount of first lens is in reasonable range, and can reduce the optical sensitive degree of the image side surface of the first lens.

In the exemplary embodiment, the optical imaging system of the application can meet 0.5 < R4/fx < 3.5 of conditional, In, R4 is the radius of curvature of the image side surface of the second lens, and fx is the effective focal length of the X-direction of optical imaging system.More specifically Ground, R4 and fx can further meet 0.80≤R4/fx≤3.20.The rationally radius of curvature and X of the image side surface of the second lens of control The ratio of the effective focal length of axis direction, can be effectively controlled the curvature of the image side surface of the second lens, and can effectively reduce color difference on axis, Ensure good image quality.

In the exemplary embodiment, the optical imaging system of the application can meet 1.5 < R9/fx < 3.5 of conditional, In, R9 is the radius of curvature of the object side of the 5th lens, and fx is the effective focal length of the X-direction of optical imaging system.More specifically Ground, R9 and fx can further meet 1.6 < R9/fx < 3.2, such as 1.75≤R9/fx≤3.08.Rationally control the 5th lens The curvature of the object side of the 5th lens can be effectively controlled in the ratio of the effective focal length of the radius of curvature and X-direction of object side, and Chief ray angle (CRA) matching that can ensure that camera lens, effectively corrects the astigmatism and the curvature of field of camera lens.

In the exemplary embodiment, the optical imaging system of the application can meet 2.5 < CT5/CT6 < 4.5 of conditional, Wherein, CT5 is center thickness of the 5th lens on optical axis, and CT6 is center thickness of the 6th lens on optical axis.More specifically Ground, CT5 and CT6 can further meet 2.5 < CT5/CT6 < 4.3, such as 2.60≤CT5/CT6≤4.12.Reasonable distribution the 5th The center thickness of lens and the 6th lens can make lens be easy to injection molding, improve the machinability of imaging system, while may be used also Guarantee good image quality.

In the exemplary embodiment, the optical imaging system of the application can meet 1.5 < CT4/CT3 < 3 of conditional, In, CT4 is center thickness of the 4th lens on optical axis, and CT3 is center thickness of the third lens on optical axis.More specifically, CT4 and CT3 can further meet 1.58≤CT4/CT3≤2.79.The 4th lens of reasonable disposition and the third lens are on optical axis Center thickness, can effectively reduce the thickness-sensitive of camera lens, and help to correct the curvature of field.

In the exemplary embodiment, the optical imaging system of the application can meet conditional 0≤(T12+T34+T56)/ TTL < 0.5, wherein T12 is the spacing distance of the first lens and the second lens on optical axis, and T34 is that the third lens and the 4th are saturating Spacing distance of the mirror on optical axis, T56 are the spacing distance of the 5th lens and the 6th lens on optical axis, and TTL is the first lens Object side to optical imaging system distance of the imaging surface on optical axis.More specifically, T12, T34, T56 and TTL are further 0≤(T12+T34+T56)/TTL < 0.4, such as 0.10≤(T12+T34+T56)/TTL≤0.22 can be met.Reasonable disposition is each Spacing distance of the adjacent lens on optical axis, can effectively reduce the thickness-sensitive of camera lens, and help to correct the curvature of field.

In the exemplary embodiment, the optical imaging system of the application can meet 80 ° of conditional Semi-FOV >, In, Semi-FOV is the maximum angle of half field-of view of optical imaging system.More specifically, Semi-FOV can further meet 80 ° of < 85 ° of Semi-FOV <, such as 81.0 °≤Semi-FOV≤82.0 °.The maximum angle of half field-of view of control optical imaging system is greater than 80, be conducive to expand object space information obtained.

In the exemplary embodiment, the optical imaging system of the application can meet conditional Fno < 1.5, wherein Fno For the F-number of optical imaging system.More specifically, Fno can further meet 1.1 < Fno < 1.3, such as 1.22≤Fno≤ 1.24.Meet conditional Fno < 1.5, is conducive to obtain bigger light-inletting quantity in the case of identical focal length, improves the photograph of image planes The response of degree and chip, to reduce the power consumption of system.

In the exemplary embodiment, above-mentioned optical imaging system may also include diaphragm, to promote the image quality of camera lens. Optionally, diaphragm may be provided between the second lens and the third lens.

Optionally, above-mentioned optical imaging system may also include optical filter for correcting color error ratio and/or for protecting The protection glass of photosensitive element on imaging surface.

Multi-disc eyeglass, such as described above six can be used according to the optical imaging system of the above embodiment of the application Piece.By each power of lens of reasonable distribution, face type, each lens center thickness and each lens between axis on spacing Deng the volume that can effectively reduce camera lens, the machinability for reducing the susceptibility of camera lens and improving camera lens, so that optical imagery system System, which is more advantageous to, to be produced and processed and is applicable to portable electronic product.In addition, it is non-rotationally-symmetric aspherical by introducing, Meridian aberration outside the axis of optical imaging system and sagitta of arc aberration are corrected, further image quality can be obtained and promoted.

In presently filed embodiment, the mirror surface of each lens mostly uses aspherical mirror.The characteristics of non-spherical lens, is: From lens centre to lens perimeter, curvature is consecutive variations.With the ball from lens centre to lens perimeter with constant curvature Face lens are different, and non-spherical lens has more preferably radius of curvature characteristic, and there is improvement to distort aberration and improve astigmatic image error Advantage.After non-spherical lens, the aberration occurred when imaging can be eliminated, as much as possible so as to improve at image quality Amount.Optionally, the object side and image side of the second lens, the third lens, the 5th lens and at least one lens in the 6th lens Face can be aspherical.The object side and image side surface of first lens and at least one lens in the 4th lens can be spherical surface.

However, it will be understood by those of skill in the art that without departing from this application claims technical solution the case where Under, the lens numbers for constituting optical imaging system can be changed, to obtain each result and advantage described in this specification.Example Such as, although being described by taking six lens as an example in embodiments, which is not limited to include six Lens.If desired, the optical imaging system may also include the lens of other quantity.

The specific embodiment for being applicable to the optical imaging system of above embodiment is further described with reference to the accompanying drawings.

Embodiment 1

Referring to Fig. 1 and Fig. 2 description according to the optical imaging system of the embodiment of the present application 1.Fig. 1 is shown according to this Shen Please embodiment 1 optical imaging system structural schematic diagram.

As shown in Figure 1, according to the optical imaging system of the application illustrative embodiments along optical axis by object side to image side according to Sequence include: the first lens E1, the second lens E2, diaphragm STO, the third lens E3, the 4th lens E4, the 5th lens E5, the 6th thoroughly Mirror E6, optical filter E7, protection glass E8 and imaging surface S17.

First lens E1 has negative power, and object side S1 is convex surface, and image side surface S2 is concave surface.Second lens E2 has Negative power, object side S3 are convex surface, and image side surface S4 is concave surface.The third lens E3 has positive light coke, and object side S5 is Concave surface, image side surface S6 are convex surface.4th lens E4 has positive light coke, and object side S7 is convex surface, and image side surface S8 is convex surface.The Five lens E5 have positive light coke, and object side S9 is convex surface, and image side surface S10 is convex surface.6th lens E6 has negative power, Its object side S11 is concave surface, and image side surface S12 is convex surface.Optical filter E7 has object side S13 and image side surface S14.Protect glass E8 With object side S15 and image side surface S16.Light from object sequentially passes through each surface S1 to S16 and is ultimately imaged in imaging surface On S17.

Optionally, the service band of optical imaging system can be about 900nm to about 1000nm.

Table 1 show the surface types of each lens of the optical imaging system of embodiment 1, radius of curvature X, radius of curvature Y, Thickness, material, circular cone coefficient X and circular cone coefficient Y, wherein the unit of radius of curvature X, radius of curvature Y and thickness are millimeter (mm)。

Table 1

It should be understood that in upper table without especially indicate (blank space) " radius of curvature X " and " circular cone coefficient X " with it is right " radius of curvature Y " and " circular cone coefficient Y " numerical value answered is consistent.It is similar in following embodiment.

As shown in Table 1, the object side of any one lens and picture in the second lens E2, the third lens E3 and the 5th lens E5 The object side S11 of side and the 6th lens E6 are aspherical.In the present embodiment, the face type x of each non-spherical lens can benefit With but be not limited to following aspherical formula and be defined:

Wherein, x be it is aspherical along optical axis direction when being highly the position of h, away from aspheric vertex of surface apart from rise；C is Aspherical paraxial curvature, c=1/R (that is, inverse that paraxial curvature c is upper 1 mean curvature radius R of table)；K be circular cone coefficient ( It has been provided in table 1)；Ai is the correction factor of aspherical i-th-th rank.The following table 2 give can be used for it is each aspherical in embodiment 1 The high-order coefficient A of mirror surface S3-S6, S9-S11₄、A₆、A₈、A₁₀、A₁₂、A₁₄、A₁₆、A₁₈And A₂₀。

Face Number

A4

A6

A8

A10

A12

A14

A16

A18

A20

S3

9.3082E-03

-1.4174E-03

1.5172E-04

-1.0588E-05

4.4981E-07

-1.0611E-08

1.0630E-10

2.6682E-34

S4

2.5510E-02

-3.0568E-03

2.0939E-04

3.1634E-05

-6.3501E-06

4.2395E-07

-1.0467E-08

2.6682E-34

S5

-8.2000E-03

-7.4225E-04

4.5523E-04

-3.2588E-04

1.0386E-04

-1.7392E-05

1.1172E-06

2.6682E-34

S6

-3.9060E-03

-3.1852E-04

2.2890E-04

-9.9174E-05

2.3584E-05

-3.1125E-06

1.6892E-07

2.6682E-34

S9

-9.7859E-04

-5.5656E-05

-2.0138E-05

4.1505E-06

-5.1648E-07

2.9308E-08

-5.7860E-10

2.6682E-34

S10

-1.2991E-03

-1.4219E-03

2.5469E-04

-2.1076E-05

8.7167E-07

-1.3626E-08

7.9692E-33

2.6682E-34

S11

-6.0291E-03

3.4062E-03

-8.1083E-04

1.0158E-04

-7.0796E-06

2.6135E-07

-3.9778E-09

2.6682E-34

Table 2

By table 1 it can also be seen that the image side surface S12 of the 6th lens E6 is non-rotationally-symmetric aspherical (that is, the face AAS), Non-rotationally-symmetric aspherical face type is available but is not limited to following non-rotationally-symmetric aspherical formula and is defined:

Wherein, z is the rise for being parallel to the face of Z-direction；CUX, CUY are respectively the curvature (=1/ of X, Y-direction vertex of surface Radius of curvature)；KX, KY are respectively X, Y-direction circular cone coefficient；AR, BR, CR, DR, ER, FR, GR, HR, JR are respectively aspherical rotation Turn 4 ranks, 6 ranks, 8 ranks, 10 ranks, 12 ranks, 14 ranks, 16 ranks, 18 ranks, 20 level numbers in symmetrical components；AP,BP,CP,DP,EP, FP, GP, HP, JP are respectively 4 ranks, 6 ranks, 8 ranks, 10 ranks, 12 ranks, 14 ranks, 16 ranks, 18 in aspherical non-rotational symmetry component Rank, 20 level numbers.The following table 3 give the AR, BR that can be used for the non-rotationally-symmetric aspherical S12 in embodiment 1, CR, DR, ER, FR, GR, HR, JR coefficient and AP, BP, CP, DP, EP, FP, GP, HP, JP coefficient.

Table 3

Table 4 gives effective coke of the effective focal length f1 to f6 of each lens in embodiment 1, optical imaging system X-direction Away from fx, the effective focal length fy of optical imaging system Y direction, optical imaging system optics total length TTL (that is, from first thoroughly Distance of the object side S1 of mirror E1 to imaging surface S17 on optical axis), on imaging surface S17 effective pixel area diagonal line length one Half ImgH, maximum angle of half field-of view Semi-FOV and F-number Fno.

f1(mm)	-9.56	fx(mm)	2.60
				f2(mm)	-12.52	fy(mm)	2.08
f3(mm)	12.88	TTL(mm)	22.03
				f4(mm)	8.63	ImgH(mm)	3.09
f5(mm)	2.84	Semi-FOV(°)	81.0
				f6(mm)	-7.55	Fno	1.23

Table 4

Optical imaging system in embodiment 1 meets:

Fx/fy=1.25, wherein fx is the effective focal length of the X-direction of optical imaging system, and fy is optical imaging system Y direction effective focal length；

F1/f2=0.76, wherein f1 is the effective focal length of the first lens E1, and f2 is the effective focal length of the second lens E2；

R2/fx=1.77, wherein R2 is the radius of curvature of the image side surface S2 of the first lens E1, and fx is optical imaging system X-direction effective focal length；

R4/fx=0.80, wherein R4 is the radius of curvature of the image side surface S4 of the second lens E2, and fx is optical imaging system X-direction effective focal length；

R9/fx=1.79, wherein R9 is the radius of curvature of the object side S9 of the 5th lens E5, and fx is optical imaging system X-direction effective focal length；

CT5/CT6=4.00, wherein CT5 is center thickness of the 5th lens E5 on optical axis, and CT6 is the 6th lens E6 Center thickness on optical axis；

CT4/CT3=2.08, wherein CT4 is center thickness of the 4th lens E4 on optical axis, and CT3 is the third lens E3 Center thickness on optical axis；

(T12+T34+T56)/TTL=0.11, wherein T12 be the first lens E1 and the second lens E2 on optical axis between Gauge is from T34 is the spacing distance of the third lens E3 and the 4th lens E4 on optical axis, and T56 is the 5th lens E5 and the 6th saturating Spacing distance of the mirror E6 on optical axis, the imaging surface S17 of the object side S1 that TTL is the first lens E1 to optical imaging system is in light Distance on axis；

Semi-FOV=81.0 °, wherein Semi-FOV is the maximum angle of half field-of view of optical imaging system；

Fno=1.23, wherein Fno is the F-number of optical imaging system.

At different field angles that Fig. 2 shows the RMS spot diameters of the optical imaging system of embodiment 1 in first quartile Size cases.As can be seen from FIG. 2, optical imaging system given by embodiment 1 can be realized good image quality.

Embodiment 2

Referring to Fig. 3 and Fig. 4 description according to the optical imaging system of the embodiment of the present application 2.In the present embodiment and following In embodiment, for brevity, by clipped description similar to Example 1.Fig. 3 is shown according to the embodiment of the present application 2 Optical imaging system structural schematic diagram.

As shown in figure 3, according to the optical imaging system of the application illustrative embodiments along optical axis by object side to image side according to Sequence include: the first lens E1, the second lens E2, diaphragm STO, the third lens E3, the 4th lens E4, the 5th lens E5, the 6th thoroughly Mirror E6, optical filter E7, protection glass E8 and imaging surface S17.

First lens E1 has negative power, and object side S1 is convex surface, and image side surface S2 is concave surface.Second lens E2 has Negative power, object side S3 are convex surface, and image side surface S4 is concave surface.The third lens E3 has positive light coke, and object side S5 is Concave surface, image side surface S6 are convex surface.4th lens E4 has positive light coke, and object side S7 is convex surface, and image side surface S8 is convex surface.The Five lens E5 have positive light coke, and object side S9 is convex surface, and image side surface S10 is concave surface.6th lens E6 has positive light coke, Its object side S11 is concave surface, and image side surface S12 is convex surface.Optical filter E7 has object side S13 and image side surface S14.Protect glass E8 With object side S15 and image side surface S16.Light from object sequentially passes through each surface S1 to S16 and is ultimately imaged in imaging surface On S17.

Table 5 show the surface types of each lens of the optical imaging system of embodiment 2, radius of curvature X, radius of curvature Y, Thickness, material, circular cone coefficient X and circular cone coefficient Y, wherein the unit of radius of curvature X, radius of curvature Y and thickness are millimeter (mm)。

Table 5

As shown in Table 5, in example 2, any one lens in the second lens E2, the third lens E3 and the 5th lens E5 Object side and image side surface and be aspherical with the object side S11 of the 6th lens E6；The image side surface S12 of 6th lens E6 is It is non-rotationally-symmetric aspherical.

Table 6 shows the high-order coefficient that can be used for each aspherical mirror in embodiment 2, wherein each aspherical face type can It is limited by the formula (1) provided in above-described embodiment 1.Table 7 show can be used for it is non-rotationally-symmetric aspherical in embodiment 2 The rotational symmetry component of S12 and the higher order coefficient of non-rotational symmetry component, wherein non-rotationally-symmetric aspherical face type can be by The formula (2) provided in above-described embodiment 1 limits.

Face Number

A4

A6

A8

A10

A12

A14

A16

A18

A20

S3

8.5362E-03

-1.5114E-03

1.5591E-04

-1.0640E-05

4.4872E-07

-1.0349E-08

1.1154E-10

-2.6334E-13

-1.4656E-14

S4

8.0757E-03

-1.0913E-03

-9.9866E-05

4.5553E-05

-6.4650E-06

4.2380E-07

-1.0656E-08

-2.0422E-11

6.1241E-13

S5

-5.7481E-03

-8.8351E-05

2.9671E-04

-2.8871E-04

1.0349E-04

-1.7316E-05

1.1418E-06

1.2902E-09

-1.1578E-09

S6

-2.5245E-03

-1.8136E-04

1.6786E-04

-9.2255E-05

2.3889E-05

-3.0835E-06

1.6705E-07

-8.3206E-10

-8.1754E-11

S9

-1.5765E-03

-5.7172E-06

-1.7877E-05

3.9907E-06

-5.0639E-07

2.9435E-08

-5.9346E-10

-1.4495E-12

-1.6209E-14

S10

-1.2945E-04

-1.3947E-03

2.4158E-04

-2.0890E-05

9.0850E-07

-1.1540E-08

5.5979E-11

-2.7607E-12

-6.1045E-13

S11

-8.4753E-03

2.9315E-03

-7.4480E-04

1.0011E-04

-7.0661E-06

2.6150E-07

-4.0271E-09

-4.5162E-12

-5.7430E-14

Table 6

Table 7

Table 8 gives effective coke of the effective focal length f1 to f6 of each lens in embodiment 2, optical imaging system X-direction Away from fx, the effective focal length fy of optical imaging system Y direction, optical imaging system optics total length TTL, imaging surface S17 on Half ImgH, the maximum angle of half field-of view Semi-FOV and F-number Fno of effective pixel area diagonal line length.

f1(mm)	-10.41	fx(mm)	1.93
				f2(mm)	-9.04	fy(mm)	2.12
f3(mm)	17.79	TTL(mm)	24.30
				f4(mm)	8.80	ImgH(mm)	2.90
f5(mm)	9.72	Semi-FOV(°)	81.9
				f6(mm)	28.86	Fno	1.24

Table 8

Fig. 4 shows the RMS spot diameter of the optical imaging system of embodiment 2 in first quartile at different field angles Size cases.As can be seen from FIG. 4, optical imaging system given by embodiment 2 can be realized good image quality.

Embodiment 3

The optical imaging system according to the embodiment of the present application 3 is described referring to Fig. 5 and Fig. 6.

Fig. 5 shows the structural schematic diagram of the optical imaging system according to the embodiment of the present application 3.

As shown in figure 5, according to the optical imaging system of the application illustrative embodiments along optical axis by object side to image side according to Sequence include: the first lens E1, the second lens E2, diaphragm STO, the third lens E3, the 4th lens E4, the 5th lens E5, the 6th thoroughly Mirror E6, optical filter E7, protection glass E8 and imaging surface S17.

First lens E1 has negative power, and object side S1 is convex surface, and image side surface S2 is concave surface.Second lens E2 has Negative power, object side S3 are convex surface, and image side surface S4 is concave surface.The third lens E3 has positive light coke, and object side S5 is Concave surface, image side surface S6 are convex surface.4th lens E4 has positive light coke, and object side S7 is convex surface, and image side surface S8 is concave surface.The Five lens E5 have positive light coke, and object side S9 is convex surface, and image side surface S10 is convex surface.6th lens E6 has negative power, Its object side S11 is concave surface, and image side surface S12 is convex surface.Optical filter E7 has object side S13 and image side surface S14.Protect glass E8 With object side S15 and image side surface S16.Light from object sequentially passes through each surface S1 to S16 and is ultimately imaged in imaging surface On S17.

Table 9 show the surface types of each lens of the optical imaging system of embodiment 3, radius of curvature X, radius of curvature Y, Thickness, material, circular cone coefficient X and circular cone coefficient Y, wherein the unit of radius of curvature X, radius of curvature Y and thickness are millimeter (mm)。

Table 9

As shown in Table 9, in embodiment 3, in the second lens E2 and the third lens E3 the object side of any one lens and The object side S9 of image side surface and the 5th lens E5, the 6th lens E6 image side surface S12 be aspherical；The picture of 5th lens E5 Side S10, the 6th lens E6 object side S11 be it is non-rotationally-symmetric aspherical.

Table 10 shows the high-order coefficient that can be used for each aspherical mirror in embodiment 3, wherein each aspherical face type can It is limited by the formula (1) provided in above-described embodiment 1.Table 11 show can be used for it is non-rotationally-symmetric aspherical in embodiment 3 The rotational symmetry component of S10 and S11 and the higher order coefficient of non-rotational symmetry component, wherein non-rotationally-symmetric aspherical face Type can be limited by the formula (2) provided in above-described embodiment 1.

Face Number

A4

A6

A8

A10

A12

A14

A16

A18

A20

S3

1.2477E-02

-1.6232E-03

1.4533E-04

-1.0604E-05

4.6503E-07

-1.0678E-08

6.0269E-11

5.5471E-13

4.1375E-14

S4

1.6927E-02

-1.1240E-03

-4.4020E-05

3.4697E-05

-5.9091E-06

4.2975E-07

-1.0329E-08

-2.8205E-10

1.4262E-11

S5

-1.6428E-03

-5.6625E-04

4.5430E-04

-3.0051E-04

1.0173E-04

-1.7688E-05

1.2170E-06

3.2413E-08

-6.1911E-09

S6

-7.4651E-04

-2.8689E-04

2.3357E-04

-1.0154E-04

2.3521E-05

-2.9305E-06

1.8039E-07

-4.1240E-09

1.9635E-11

S9

-3.4443E-04

-2.9005E-04

1.3400E-05

2.5069E-06

-9.0687E-07

1.0703E-08

1.8484E-09

3.5180E-10

-2.1996E-11

S12

8.5336E-03

1.7558E-03

-4.4644E-04

2.8096E-05

3.2187E-06

-5.4628E-07

1.0323E-08

1.5528E-09

-5.5499E-11

Table 10

Table 11

Table 12 gives effective coke of the effective focal length f1 to f6 of each lens in embodiment 3, optical imaging system X-direction Away from fx, the effective focal length fy of optical imaging system Y direction, optical imaging system optics total length TTL, imaging surface S17 on Half ImgH, the maximum angle of half field-of view Semi-FOV and F-number Fno of effective pixel area diagonal line length.

f1(mm)	-8.31	fx(mm)	2.30
				f2(mm)	-12.66	fy(mm)	2.06
f3(mm)	17.92	TTL(mm)	22.52
				f4(mm)	11.49	ImgH(mm)	3.06
f5(mm)	2.18	Semi-FOV(°)	82.0
				f6(mm)	-2.61	Fno	1.23

Table 12

Fig. 6 shows the RMS spot diameter of the optical imaging system of embodiment 3 in first quartile at different field angles Size cases.As can be seen from FIG. 6, optical imaging system given by embodiment 3 can be realized good image quality.

Embodiment 4

The optical imaging system according to the embodiment of the present application 4 is described referring to Fig. 7 and Fig. 8.

Fig. 7 shows the structural schematic diagram of the optical imaging system according to the embodiment of the present application 4.

As shown in fig. 7, according to the optical imaging system of the application illustrative embodiments along optical axis by object side to image side according to Sequence include: the first lens E1, the second lens E2, diaphragm STO, the third lens E3, the 4th lens E4, the 5th lens E5, the 6th thoroughly Mirror E6, optical filter E7, protection glass E8 and imaging surface S17.

Table 13 shows the surface type of each lens of the optical imaging system of embodiment 4, radius of curvature X, radius of curvature Y, thickness, material, circular cone coefficient X and circular cone coefficient Y, wherein the unit of radius of curvature X, radius of curvature Y and thickness are milli Rice (mm).

Table 13

As shown in Table 13, in example 4, in the second lens E2 and the third lens E3 the object side of any one lens and The object side S9 of image side surface and the 5th lens E5, the 6th lens E6 image side surface S12 be aspherical；The picture of 5th lens E5 Side S10, the 6th lens E6 object side S11 be it is non-rotationally-symmetric aspherical.

Table 14 shows the high-order coefficient that can be used for each aspherical mirror in embodiment 4, wherein each aspherical face type can It is limited by the formula (1) provided in above-described embodiment 1.Table 15 show can be used for it is non-rotationally-symmetric aspherical in embodiment 4 The rotational symmetry component of S10 and S11 and the higher order coefficient of non-rotational symmetry component, wherein non-rotationally-symmetric aspherical face Type can be limited by the formula (2) provided in above-described embodiment 1.

Face Number

A4

A6

A8

A10

A12

A14

A16

A18

A20

S3

6.5769E-04

-1.0665E-03

1.3321E-04

-1.0117E-05

4.5381E-07

-1.0396E-08

4.7022E-11

3.5950E-13

1.0074E-13

S4

5.4022E-03

-1.2843E-03

3.2080E-05

3.4208E-05

-5.8331E-06

4.3014E-07

-1.2069E-08

-1.4731E-10

1.1466E-11

S5

-1.1736E-03

-4.5167E-04

4.5158E-04

-3.0160E-04

1.0185E-04

-1.7673E-05

1.2153E-06

3.1902E-08

-6.1719E-09

S6

1.4176E-03

-1.6059E-04

2.3131E-04

-9.9531E-05

2.3444E-05

-2.9345E-06

1.8107E-07

-4.0013E-09

1.2648E-11

S9

-5.7535E-04

-1.5179E-04

9.1798E-06

2.6207E-06

-9.0219E-07

1.0747E-08

1.8422E-09

3.5053E-10

-2.2038E-11

S12

3.8400E-03

1.3547E-03

-3.8505E-04

2.5845E-05

3.2611E-06

-5.4141E-07

1.0511E-08

1.5305E-09

-6.0244E-11

Table 14

Table 15

Table 16 gives effective coke of the effective focal length f1 to f6 of each lens in embodiment 4, optical imaging system X-direction Away from fx, the effective focal length fy of optical imaging system Y direction, optical imaging system optics total length TTL, imaging surface S17 on Half ImgH, the maximum angle of half field-of view Semi-FOV and F-number Fno of effective pixel area diagonal line length.

f1(mm)	-8.05	fx(mm)	1.84
				f2(mm)	-8.33	fy(mm)	2.08
f3(mm)	10.57	TTL(mm)	22.49
				f4(mm)	10.69	ImgH(mm)	2.90
f5(mm)	2.72	Semi-FOV(°)	82.0
				f6(mm)	-3.99	Fno	1.24

Table 16

Fig. 8 shows the RMS spot diameter of the optical imaging system of embodiment 4 in first quartile at different field angles Size cases.As can be seen from FIG. 8, optical imaging system given by embodiment 4 can be realized good image quality.

Embodiment 5

The optical imaging system according to the embodiment of the present application 5 is described referring to Fig. 9 and Figure 10.Fig. 9 shows basis The structural schematic diagram of the optical imaging system of the embodiment of the present application 5.

As shown in figure 9, according to the optical imaging system of the application illustrative embodiments along optical axis by object side to image side according to Sequence include: the first lens E1, the second lens E2, diaphragm STO, the third lens E3, the 4th lens E4, the 5th lens E5, the 6th thoroughly Mirror E6, optical filter E7, protection glass E8 and imaging surface S17.

Table 17 shows the surface type of each lens of the optical imaging system of embodiment 5, radius of curvature X, radius of curvature Y, thickness, material, circular cone coefficient X and circular cone coefficient Y, wherein the unit of radius of curvature X, radius of curvature Y and thickness are milli Rice (mm).

Table 17

As shown in Table 17, in embodiment 5, any one in the second lens E2, the third lens E3 and the 5th lens E5 is saturating The object side of mirror and image side surface are aspherical；The object side S11 and image side surface S12 of 6th lens E6 is non-rotationally-symmetric non- Spherical surface.

Table 18 shows the high-order coefficient that can be used for each aspherical mirror in embodiment 5, wherein each aspherical face type can It is limited by the formula (1) provided in above-described embodiment 1.Table 19 show can be used for it is non-rotationally-symmetric aspherical in embodiment 5 The rotational symmetry component of S11 and S12 and the higher order coefficient of non-rotational symmetry component, wherein non-rotationally-symmetric aspherical face Type can be limited by the formula (2) provided in above-described embodiment 1.

Face Number

A4

A6

A8

A10

A12

A4

A16

A18

A20

S3

9.2753E-03

-1.4188E-03

1.5079E-04

-1.0527E-05

4.4981E-07

-1.0611E-08

1.0630E-10

2.6682E-34

S4

1.6801E-02

-5.7833E-04

-1.3441E-04

4.4818E-05

-6.3501E-06

4.2395E-07

-1.0467E-08

2.6682E-34

S5

-7.7460E-03

-6.1988E-04

2.5813E-04

-2.8440E-04

1.0386E-04

-1.7392E-05

1.1172E-06

2.6682E-34

S6

-3.7382E-03

1.2055E-04

9.1072E-05

-8.4173E-05

2.3584E-05

-3.1125E-06

1.6892E-07

2.6682E-34

S9

-2.7765E-04

-1.5933E-04

-1.9089E-05

4.1749E-06

-5.1648E-07

2.9308E-08

-5.7860E-10

2.6682E-34

S10

1.8011E-03

-1.3468E-03

2.4303E-04

-2.1127E-05

8.7167E-07

-1.3626E-08

7.9692E-33

2.6682E-34

Table 18

Table 19

Table 20 gives effective coke of the effective focal length f1 to f6 of each lens in embodiment 5, optical imaging system X-direction Away from fx, the effective focal length fy of optical imaging system Y direction, optical imaging system optics total length TTL, imaging surface S17 on Half ImgH, the maximum angle of half field-of view Semi-FOV and F-number Fno of effective pixel area diagonal line length.

f1(mm)	-12.84	fx(mm)	1.66
				f2(mm)	-6.98	fy(mm)	2.06
f3(mm)	12.47	TTL(mm)	22.72
				f4(mm)	9.04	ImgH(mm)	3.40
f5(mm)	5.11	Semi-FOV(°)	81.0
				f6(mm)	-11.42	Fno	1.24

Table 20

Figure 10 shows the RMS spot diameter of the optical imaging system of embodiment 5 in first quartile at different field angles Size cases.As can be seen from FIG. 10, optical imaging system given by embodiment 5 can be realized good image quality.

Embodiment 6

The optical imaging system according to the embodiment of the present application 6 is described referring to Figure 11 and Figure 12.Figure 11 shows root According to the structural schematic diagram of the optical imaging system of the embodiment of the present application 6.

As shown in figure 11, according to the optical imaging system of the application illustrative embodiments along optical axis by object side to image side according to Sequence include: the first lens E1, the second lens E2, diaphragm STO, the third lens E3, the 4th lens E4, the 5th lens E5, the 6th thoroughly Mirror E6, optical filter E7, protection glass E8 and imaging surface S17.

First lens E1 has negative power, and object side S1 is convex surface, and image side surface S2 is concave surface.Second lens E2 has Negative power, object side S3 are convex surface, and image side surface S4 is concave surface.The third lens E3 has positive light coke, and object side S5 is Concave surface, image side surface S6 are convex surface.4th lens E4 has positive light coke, and object side S7 is convex surface, and image side surface S8 is convex surface.The Five lens E5 have positive light coke, and object side S9 is convex surface, and image side surface S10 is convex surface.6th lens E6 has positive light coke, Its object side S11 is concave surface, and image side surface S12 is convex surface.Optical filter E7 has object side S13 and image side surface S14.Protect glass E8 With object side S15 and image side surface S16.Light from object sequentially passes through each surface S1 to S16 and is ultimately imaged in imaging surface On S17.

Table 21 shows the surface type of each lens of the optical imaging system of embodiment 6, radius of curvature X, radius of curvature Y, thickness, material, circular cone coefficient X and circular cone coefficient Y, wherein the unit of radius of curvature X, radius of curvature Y and thickness are milli Rice (mm).

Table 21

As shown in Table 21, in embodiment 6, any one in the second lens E2, the third lens E3 and the 5th lens E5 is saturating The object side of mirror and image side surface are aspherical；The object side S11 and image side surface S12 of 6th lens E6 is non-rotationally-symmetric non- Spherical surface.

Table 22 shows the high-order coefficient that can be used for each aspherical mirror in embodiment 6, wherein each aspherical face type can It is limited by the formula (1) provided in above-described embodiment 1.Table 23 show can be used for it is non-rotationally-symmetric aspherical in embodiment 6 The rotational symmetry component of S11 and S12 and the higher order coefficient of non-rotational symmetry component, wherein non-rotationally-symmetric aspherical face Type can be limited by the formula (2) provided in above-described embodiment 1.

Face Number

A4

A6

A8

A10

A12

A14

A16

A18

A20

S3

9.2142E-03

-1.4198E-03

1.5174E-04

-1.0551E-05

4.4981E-07

-1.0611E-08

1.0630E-10

2.6682E-34

S4

1.4071E-02

-1.1939E-03

-2.7911E-05

4.0488E-05

-6.3501E-06

4.2395E-07

-1.0467E-08

2.6682E-34

S5

-7.8074E-03

-8.1281E-04

4.5880E-04

-3.2754E-04

1.0386E-04

-1.7392E-05

1.1172E-06

2.6682E-34

S6

-3.0777E-03

-3.7727E-04

2.2446E-04

-9.6904E-05

2.3584E-05

-3.1125E-06

1.6892E-07

2.6682E-34

S9

-8.7949E-04

-1.6045E-05

-2.1818E-05

4.0728E-06

-5.1648E-07

2.9308E-08

-5.7860E-10

2.6682E-34

S10

-3.4681E-03

-1.1948E-03

2.5207E-04

-2.1384E-05

8.7167E-07

-1.3626E-08

7.9692E-33

2.6682E-34

Table 22

Table 23

Table 24 gives effective coke of the effective focal length f1 to f6 of each lens in embodiment 6, optical imaging system X-direction Away from fx, the effective focal length fy of optical imaging system Y direction, optical imaging system optics total length TTL, imaging surface S17 on Half ImgH, the maximum angle of half field-of view Semi-FOV and F-number Fno of effective pixel area diagonal line length.

Table 24

Figure 12 shows the RMS spot diameter of the optical imaging system of embodiment 6 in first quartile at different field angles Size cases.As can be seen from FIG. 12, optical imaging system given by embodiment 6 can be realized good image quality.

Embodiment 7

The optical imaging system according to the embodiment of the present application 7 is described referring to Figure 13 and Figure 14.Figure 13 shows root According to the structural schematic diagram of the optical imaging system of the embodiment of the present application 7.

As shown in figure 13, according to the optical imaging system of the application illustrative embodiments along optical axis by object side to image side according to Sequence include: the first lens E1, the second lens E2, diaphragm STO, the third lens E3, the 4th lens E4, the 5th lens E5, the 6th thoroughly Mirror E6, optical filter E7, protection glass E8 and imaging surface S17.

Table 25 shows the surface type of each lens of the optical imaging system of embodiment 7, radius of curvature X, radius of curvature Y, thickness, material, circular cone coefficient X and circular cone coefficient Y, wherein the unit of radius of curvature X, radius of curvature Y and thickness are milli Rice (mm).

Table 25

As shown in Table 25, in embodiment 7, any one in the second lens E2, the third lens E3 and the 5th lens E5 is saturating The image side surface S12 of the object side of mirror and image side surface and the 6th lens E6 are aspherical；The object side S11 of 6th lens E6 is It is non-rotationally-symmetric aspherical.

Table 26 shows the high-order coefficient that can be used for each aspherical mirror in embodiment 7, wherein each aspherical face type can It is limited by the formula (1) provided in above-described embodiment 1.Table 27 show can be used for it is non-rotationally-symmetric aspherical in embodiment 7 The rotational symmetry component of S11 and the higher order coefficient of non-rotational symmetry component, wherein non-rotationally-symmetric aspherical face type can be by The formula (2) provided in above-described embodiment 1 limits.

Face Number

A4

A6

A8

A10

A12

A14

A16

A18

A20

S3

8.7701E-03

-1.5572E-03

1.5395E-04

-1.0280E-05

4.4991E-07

-1.1207E-08

2.9490E-11

-1.2241E-12

3.1813E-13

S4

1.1438E-02

-1.3313E-03

-3.6440E-05

3.8439E-05

-5.4791E-06

3.8841E-07

-6.1005E-09

-1.7553E-09

1.1951E-10

S5

-1.7242E-03

-4.2926E-04

4.4348E-04

-3.0254E-04

1.0194E-04

-1.7657E-05

1.2150E-06

3.1509E-08

-6.1677E-09

S6

-5.6388E-05

-2.8174E-04

2.4349E-04

-1.0122E-04

2.3417E-05

-2.9394E-06

1.8115E-07

-3.9012E-09

1.8907E-11

S9

-5.5945E-04

-2.3789E-04

1.6017E-05

2.4080E-06

-9.0449E-07

1.1043E-08

1.8353E-09

3.4641E-10

-2.1926E-11

S10

-7.2362E-03

-4.9299E-04

2.0981E-04

-2.2827E-05

9.7178E-07

5.3798E-11

-1.5348E-10

-1.2380E-10

6.1584E-12

S12

1.4322E-03

2.0664E-03

-4.5421E-04

2.8400E-05

3.3109E-06

-5.3703E-07

1.0617E-08

1.5104E-09

-6.4027E-11

Table 26

Table 27

Table 28 gives effective coke of the effective focal length f1 to f6 of each lens in embodiment 7, optical imaging system X-direction Away from fx, the effective focal length fy of optical imaging system Y direction, optical imaging system optics total length TTL, imaging surface S17 on Half ImgH, the maximum angle of half field-of view Semi-FOV and F-number Fno of effective pixel area diagonal line length.

f1(mm)	-7.60	fx(mm)	2.29
				f2(mm)	-9.69	fy(mm)	2.06
f3(mm)	16.27	TTL(mm)	23.47
				f4(mm)	12.76	ImgH(mm)	3.08
f5(mm)	1.86	Semi-FOV(°)	82.0
				f6(mm)	-2.10	Fno	1.23

Table 28

Figure 14 shows the RMS spot diameter of the optical imaging system of embodiment 7 in first quartile at different field angles Size cases.As can be seen from FIG. 14, optical imaging system given by embodiment 7 can be realized good image quality.

Embodiment 8

The optical imaging system according to the embodiment of the present application 8 is described referring to Figure 15 and Figure 16.Figure 15 shows root According to the structural schematic diagram of the optical imaging system of the embodiment of the present application 8.

As shown in figure 15, according to the optical imaging system of the application illustrative embodiments along optical axis by object side to image side according to Sequence include: the first lens E1, the second lens E2, diaphragm STO, the third lens E3, the 4th lens E4, the 5th lens E5, the 6th thoroughly Mirror E6, optical filter E7, protection glass E8 and imaging surface S17.

Table 29 shows the surface type of each lens of the optical imaging system of embodiment 8, radius of curvature X, radius of curvature Y, thickness, material, circular cone coefficient X and circular cone coefficient Y, wherein the unit of radius of curvature X, radius of curvature Y and thickness are milli Rice (mm).

Table 29

As shown in Table 29, in embodiment 8, any one in the second lens E2, the third lens E3 and the 5th lens E5 is saturating The image side surface S12 of the object side of mirror and image side surface and the 6th lens E6 are aspherical；The object side S11 of 6th lens E6 is It is non-rotationally-symmetric aspherical.

Table 30 shows the high-order coefficient that can be used for each aspherical mirror in embodiment 8, wherein each aspherical face type can It is limited by the formula (1) provided in above-described embodiment 1.Table 31 show can be used for it is non-rotationally-symmetric aspherical in embodiment 8 The rotational symmetry component of S11 and the higher order coefficient of non-rotational symmetry component, wherein non-rotationally-symmetric aspherical face type can be by The formula (2) provided in above-described embodiment 1 limits.

Face Number

A4

A6

A8

A10

A12

A14

A16

A18

A20

S3

8.8360E-03

-1.5388E-03

1.5267E-04

-1.0554E-05

4.6861E-07

-1.1050E-08

6.0920E-11

-1.6274E-13

8.2132E-14

S4

1.3097E-02

-1.4560E-03

-1.0086E-05

3.5271E-05

-6.0041E-06

4.4352E-07

-8.4957E-09

-4.5674E-10

6.8987E-12

S5

-2.0389E-03

-5.5807E-04

4.6078E-04

-3.0149E-04

1.0168E-04

-1.7717E-05

1.2183E-06

3.2875E-08

-6.2463E-09

S6

-4.9918E-04

-3.0300E-04

2.3409E-04

-1.0101E-04

2.3558E-05

-2.9320E-06

1.7866E-07

-4.3498E-09

7.0752E-11

S9

-4.0109E-04

-2.7583E-04

2.1110E-05

2.3575E-06

-9.2612E-07

9.4350E-09

1.8843E-09

3.5672E-10

-2.2163E-11

S10

-7.1203E-03

-4.7062E-04

2.1118E-04

-2.2715E-05

9.6859E-07

-3.2839E-10

-1.9901E-10

-1.2602E-10

6.5908E-12

S12

9.6644E-04

2.2173E-03

-4.7346E-04

2.8669E-05

3.3904E-06

-5.3614E-07

1.0119E-08

1.4751E-09

-6.0626E-11

Table 30

Table 31

Table 32 gives effective coke of the effective focal length f1 to f6 of each lens in embodiment 8, optical imaging system X-direction Away from fx, the effective focal length fy of optical imaging system Y direction, optical imaging system optics total length TTL, imaging surface S17 on Half ImgH, the maximum angle of half field-of view Semi-FOV and F-number Fno of effective pixel area diagonal line length.

f1(mm)	-8.89	fx(mm)	1.84
				f2(mm)	-8.12	fy(mm)	2.06
f3(mm)	17.64	TTL(mm)	24.18
				f4(mm)	11.67	ImgH(mm)	3.00
f5(mm)	1.80	Semi-FOV(°)	82.0
				f6(mm)	-1.90	Fno	1.24

Table 32

Figure 16 shows the RMS spot diameter of the optical imaging system of embodiment 8 in first quartile at different field angles Size cases.As can be seen from FIG. 16, optical imaging system given by embodiment 8 can be realized good image quality.

Embodiment 9

The optical imaging system according to the embodiment of the present application 9 is described referring to Figure 17 and Figure 18.Figure 17 shows roots According to the structural schematic diagram of the optical imaging system of the embodiment of the present application 9.

As shown in figure 17, according to the optical imaging system of the application illustrative embodiments along optical axis by object side to image side according to Sequence include: the first lens E1, the second lens E2, diaphragm STO, the third lens E3, the 4th lens E4, the 5th lens E5, the 6th thoroughly Mirror E6, optical filter E7, protection glass E8 and imaging surface S17.

First lens E1 has negative power, and object side S1 is convex surface, and image side surface S2 is concave surface.Second lens E2 has Negative power, object side S3 are convex surface, and image side surface S4 is concave surface.The third lens E3 has positive light coke, and object side S5 is Convex surface, image side surface S6 are convex surface.4th lens E4 has positive light coke, and object side S7 is concave surface, and image side surface S8 is convex surface.The Five lens E5 have negative power, and object side S9 is convex surface, and image side surface S10 is concave surface.6th lens E6 has positive light coke, Its object side S11 is convex surface, and image side surface S12 is concave surface.Optical filter E7 has object side S13 and image side surface S14.Protect glass E8 With object side S15 and image side surface S16.Light from object sequentially passes through each surface S1 to S16 and is ultimately imaged in imaging surface On S17.

Table 33 shows the surface type of each lens of the optical imaging system of embodiment 9, radius of curvature X, radius of curvature Y, thickness, material, circular cone coefficient X and circular cone coefficient Y, wherein the unit of radius of curvature X, radius of curvature Y and thickness are milli Rice (mm).

Table 33

As shown in Table 33, in embodiment 9, any one in the second lens E2, the third lens E3 and the 6th lens E6 is saturating The object side of mirror and image side surface are aspherical；The object side S9 and image side surface S10 of 5th lens E5 is non-rotationally-symmetric non- Spherical surface.

Table 34 shows the high-order coefficient that can be used for each aspherical mirror in embodiment 9, wherein each aspherical face type can It is limited by the formula (1) provided in above-described embodiment 1.Table 35 show can be used for it is non-rotationally-symmetric aspherical in embodiment 9 The rotational symmetry component of S9 and S10 and the higher order coefficient of non-rotational symmetry component, wherein non-rotationally-symmetric aspherical face type It can be limited by the formula (2) provided in above-described embodiment 1.

Face Number

A4

A6

A8

A10

A12

A14

A16

A18

A20

S3

1.0110E-02

-1.3774E-03

1.4899E-04

-1.0988E-05

4.6048E-07

-9.1928E-09

9.1272E-11

-3.7194E-12

9.8965E-14

S4

1.0763E-02

-1.0693E-03

-4.6863E-05

3.8415E-05

-6.3839E-06

4.2791E-07

-9.9302E-09

7.8916E-11

-1.0516E-11

S5

-4.8965E-03

-7.6780E-04

4.3807E-04

-2.9693E-04

9.9285E-05

-1.7472E-05

1.2551E-06

2.2233E-08

-5.6387E-09

S6

-4.7380E-04

-3.8467E-04

1.9340E-04

-9.4262E-05

2.3497E-05

-3.0866E-06

1.7395E-07

-2.4834E-11

-2.2585E-10

S11

-1.0152E-02

3.0801E-03

-7.2909E-04

9.9755E-05

-7.0919E-06

2.6211E-07

-3.9411E-09

-8.6012E-12

-1.6336E-12

S12

-3.8406E-03

2.6366E-03

-3.8408E-04

-3.9655E-06

5.0231E-06

-3.7604E-07

8.5900E-09

-2.5062E-10

1.5991E-11

Table 34

Table 35

Table 36 gives effective coke of the effective focal length f1 to f6 of each lens in embodiment 9, optical imaging system X-direction Away from fx, the effective focal length fy of optical imaging system Y direction, optical imaging system optics total length TTL, imaging surface S17 on Half ImgH, the maximum angle of half field-of view Semi-FOV and F-number Fno of effective pixel area diagonal line length.

f1(mm)	-9.75	fx(mm)	1.95
				f2(mm)	-9.66	fy(mm)	2.07
f3(mm)	11.78	TTL(mm)	24.55
				f4(mm)	9.53	ImgH(mm)	2.99
f5(mm)	-19.15	Semi-FOV(°)	81.9
				f6(mm)	7.73	Fno	1.24

Table 36

Figure 18 shows the RMS spot diameter of the optical imaging system of embodiment 9 in first quartile at different field angles Size cases.As can be seen from FIG. 18, optical imaging system given by embodiment 9 can be realized good image quality.

Embodiment 10

The optical imaging system according to the embodiment of the present application 10 is described referring to Figure 19 and Figure 20.Figure 19 shows root According to the structural schematic diagram of the optical imaging system of the embodiment of the present application 10.

As shown in figure 19, according to the optical imaging system of the application illustrative embodiments along optical axis by object side to image side according to Sequence include: the first lens E1, the second lens E2, diaphragm STO, the third lens E3, the 4th lens E4, the 5th lens E5, the 6th thoroughly Mirror E6, optical filter E7, protection glass E8 and imaging surface S17.

First lens E1 has negative power, and object side S1 is convex surface, and image side surface S2 is concave surface.Second lens E2 has Negative power, object side S3 are concave surface, and image side surface S4 is concave surface.The third lens E3 has negative power, and object side S5 is Concave surface, image side surface S6 are convex surface.4th lens E4 has positive light coke, and object side S7 is convex surface, and image side surface S8 is convex surface.The Five lens E5 have positive light coke, and object side S9 is convex surface, and image side surface S10 is convex surface.6th lens E6 has positive light coke, Its object side S11 is concave surface, and image side surface S12 is convex surface.Optical filter E7 has object side S13 and image side surface S14.Protect glass E8 With object side S15 and image side surface S16.Light from object sequentially passes through each surface S1 to S16 and is ultimately imaged in imaging surface On S17.

Table 37 shows the surface type of each lens of the optical imaging system of embodiment 10, radius of curvature X, radius of curvature Y, thickness, material, circular cone coefficient X and circular cone coefficient Y, wherein the unit of radius of curvature X, radius of curvature Y and thickness are milli Rice (mm).

Table 37

As shown in Table 37, in embodiment 10, the object side of any one lens in the second lens E2 and the third lens E3 It is aspherical with image side surface；The object side of any one lens and image side surface are non-rotation in 5th lens E5 and the 6th lens E6 Turn symmetrical aspherical.

Table 38 shows the high-order coefficient that can be used for each aspherical mirror in embodiment 10, wherein each aspherical face type It can be limited by the formula (1) provided in above-described embodiment 1.Table 39, which is shown, can be used for non-rotationally-symmetric aspheric in embodiment 10 The rotational symmetry component of face S9-S12 and the higher order coefficient of non-rotational symmetry component, wherein non-rotationally-symmetric aspherical face Type can be limited by the formula (2) provided in above-described embodiment 1.

Face Number

A4

A6

A8

A10

A12

A14

A16

A18

A20

S3

7.4657E-03

-1.2736E-03

1.5192E-04

-1.1663E-05

4.8264E-07

-5.3858E-09

-3.8632E-11

-1.6060E-11

6.1808E-13

S4

7.3932E-03

-8.0831E-04

-5.3354E-05

4.1671E-05

-6.4869E-06

4.2155E-07

-7.7839E-09

3.4502E-10

-2.5824E-11

S5

-4.8449E-03

2.5830E-04

3.6098E-04

-2.8431E-04

1.0359E-04

-1.7318E-05

1.1250E-06

-4.5116E-09

1.6509E-09

S6

-4.6664E-03

3.8493E-06

2.0535E-04

-9.3554E-05

2.3448E-05

-3.0830E-06

1.7715E-07

4.0140E-10

-3.1042E-10

Table 38

Table 39

Table 40 give the effective focal length f1 to f6 of each lens in embodiment 10, optical imaging system X-direction it is effective Focal length fx, the effective focal length fy of optical imaging system Y direction, optical imaging system optics total length TTL, imaging surface S17 Half ImgH, the maximum angle of half field-of view Semi-FOV and F-number Fno of upper effective pixel area diagonal line length.

f1(mm)	-8.21	fx(mm)	2.20
				f2(mm)	-10.93	fy(mm)	2.07
f3(mm)	-500.00	TTL(mm)	24.05
				f4(mm)	7.11	ImgH(mm)	2.90
f5(mm)	7.53	Semi-FOV(°)	81.9
				f6(mm)	19.37	Fno	1.24

Table 40

Figure 20 shows the RMS spot diameter of the optical imaging system of embodiment 10 in first quartile at different field angles Size cases.0 it is found that optical imaging system given by embodiment 10 can be realized good image quality according to fig. 2.

To sum up, embodiment 1 to embodiment 10 meets relationship shown in table 41 respectively.

Table 41

The application also provides a kind of photographic device, and electronics photosensitive element can be photosensitive coupling element (CCD) or complementation Property matal-oxide semiconductor element (CMOS).Photographic device can be the independent picture pick-up device of such as digital camera, be also possible to The photographing module being integrated on the mobile electronic devices such as mobile phone.The photographic device is equipped with optical imagery system described above System.

Above description is only the preferred embodiment of the application and the explanation to institute's application technology principle.Those skilled in the art Member is it should be appreciated that invention scope involved in the application, however it is not limited to technology made of the specific combination of above-mentioned technical characteristic Scheme, while should also cover in the case where not departing from the inventive concept, it is carried out by above-mentioned technical characteristic or its equivalent feature Any combination and the other technical solutions formed.Such as features described above has similar function with (but being not limited to) disclosed herein Can technical characteristic replaced mutually and the technical solution that is formed.

Claims

1. optical imaging system, along optical axis by object side to image side sequentially include: the first lens with focal power, second thoroughly Mirror, the third lens, the 4th lens, the 5th lens and the 6th lens,

It is characterized in that,

First lens have negative power, and object side is convex surface, and image side surface is concave surface；

4th lens have positive light coke；

At least one lens of first lens into the 6th lens have non-rotationally-symmetric aspherical；And

Effective coke of the Y direction of the effective focal length fx and optical imaging system of the X-direction of the optical imaging system Meet 0.5 < fx/fy < 1.5 away from fy.

2. optical imaging system according to claim 1, which is characterized in that the effective focal length f1 of first lens and institute The effective focal length f2 for stating the second lens meets 0.5 < f1/f2 < 2.0.

3. optical imaging system according to claim 1, which is characterized in that the curvature of the image side surface of first lens half The effective focal length fx of the X-direction of diameter R2 and the optical imaging system meets 1.5 < R2/fx < 3.5.

4. optical imaging system according to claim 1, which is characterized in that the curvature of the image side surface of second lens half The effective focal length fx of the X-direction of diameter R4 and the optical imaging system meets 0.5 < R4/fx < 3.5.

5. optical imaging system according to claim 1, which is characterized in that the curvature of the object side of the 5th lens half The effective focal length fx of the X-direction of diameter R9 and the optical imaging system meets 1.5 < R9/fx < 3.5.

6. optical imaging system according to claim 1, which is characterized in that the 5th lens on the optical axis in The center thickness CT6 of heart thickness CT5 and the 6th lens on the optical axis meets 2.5 < CT5/CT6 < 4.5.

7. optical imaging system according to claim 1, which is characterized in that the 4th lens on the optical axis in The center thickness CT3 of heart thickness CT4 and the third lens on the optical axis meets 1.5 < CT4/CT3 < 3.

8. optical imaging system according to any one of claim 1 to 7, which is characterized in that first lens and institute Spacing distance T12, the third lens and fourth lens of second lens on the optical axis are stated on the optical axis Spacing distance T34, the spacing distance T56 of the 5th lens and the 6th lens on the optical axis and first lens Object side to the optical imaging system distance TTL of the imaging surface on the optical axis meet 0≤(T12+T34+T56)/ TTL < 0.5.

9. optical imaging system according to any one of claim 1 to 7, which is characterized in that the optical imaging system Maximum angle of half field-of view Semi-FOV meet 80 ° of Semi-FOV >.

10. optical imaging system, along optical axis by object side to image side sequentially include: the first lens with focal power, second thoroughly Mirror, the third lens, the 4th lens, the 5th lens and the 6th lens,

It is characterized in that,

Second lens have negative power；

4th lens have positive light coke；

The effective focal length f2 of the effective focal length f1 of first lens and second lens meets 0.5 < f1/f2 < 2.0.