CN109407277A - Optical imaging system - Google Patents

Abstract

The application discloses optical imaging system, this optical imaging system includes along optical axis from the thing side to the image side in proper order: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens, wherein the first lens has a positive optical power; the second lens has a negative optical power; at least one of the first lens to the seventh lens has a non-rotationally symmetric aspherical surface; and the on-axis distance TTL from the object side surface of the first lens to the imaging surface and the effective focal length fx in the X-axis direction of the optical imaging system meet the condition that TTL/fx < 1.

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 seven lens System.

Background technique

In recent years, with the fast development for carrying electronic product for having camera function, to miniaturized optical system It is required that also increasingly improving.The mobile lens of current main-stream generally use the aspherical of rotational symmetry (axial symmetry) to be used as its face type knot Structure.The aspherical curve that can be regarded as in meridional plane of this kind of rotational symmetry is obtained around 360 degree of optical axis rotation, therefore It only has sufficient freedom degree in meridional plane, can not correct well to off-axis aberration.

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 mobile lens.

On the one hand, this application provides such a optical imaging system, the optical imaging system by object side to image side according to Secondary includes: the first lens, the second lens, the third lens, the 4th lens, the 5th lens, the 6th lens and the 7th lens, wherein First lens have positive light coke；Second lens have negative power；At least one lens of first lens into the 7th lens With non-rotationally-symmetric aspherical；And first distance TTL and optical imaging system on lens object side to the axis of imaging surface The effective focal length fx of X-direction meet TTL/fx ﹤ 1.

In one embodiment, effective coke of the effective focal length fx and the first lens of the X-direction of optical imaging system Meet 2.0 ﹤ fx/f1 ﹤ 3.0 away from f1.

In one embodiment, the effective focal length f2 of the effective focal length f4 of the 4th lens and the second lens meets 0.5 ﹤ F4/f2 ﹤ 2.0.

In one embodiment, effective coke of the Y direction of the effective focal length f6 and optical imaging system of the 6th lens Meet 2.0 ﹤ f6/fy ﹤ 4.0 away from fy.

In one embodiment, the effective focal length f2 of the effective focal length f7 of the 7th lens and the second lens meets 1.0 ﹤ F7/f2 ﹤ 2.0.

In one embodiment, on the first lens object side to the axis of imaging surface distance TTL and optical imaging system Y The effective focal length fy of axis direction meets TTL/fy ﹤ 1.0.

In one embodiment, the radius of curvature R 11 of the 6th lens object side and the curvature of the 6th lens image side surface half Diameter R12 meets 1.0 ﹤ R11/R12 ﹤ 2.0.

In one embodiment, the radius of curvature of the radius of curvature R 7 of the 4th lens object side and the 7th lens object side R13 meets 1.0 ﹤ R7/R13 ﹤ 2.5.

In one embodiment, the effective focal length fx of the X-direction of optical imaging system and the first lens object side Radius of curvature R 1 meets 4.0 ﹤ fx/R1 ﹤ 4.5.

In one embodiment, the X-direction of the radius of curvature R 4 and optical imaging system of the second lens image side surface Effective focal length fx meets 0 ﹤ R4/fx ﹤ 1.5.

In one embodiment, airspace T12, the second lens and of the first lens and the second lens on optical axis Airspace T34, fourth lens of airspace T23, the third lens and fourth lens of three lens on optical axis on optical axis Meet with airspace T56 of airspace T45 and fiveth lens and sixth lens of the 5th lens on optical axis on optical axis 1.5 ﹤ (T12+T23+T34+T45)/T56 ﹤ 2.5.

On the other hand, this application provides such a optical imaging systems, and the optical imaging system is by object side to image side It successively include: the first lens, the second lens, the third lens, the 4th lens, the 5th lens, the 6th lens and the 7th lens, In, the first lens have positive light coke；Second lens have negative power；At least one of first lens to the 7th lens are saturating Mirror has non-rotationally-symmetric aspherical；And the effective focal length fx of the X-direction of optical imaging system and having for the first lens It imitates focal length f1 and meets 2.0 ﹤ fx/f1 ﹤ 3.0.

Another aspect, this application provides such a optical imaging systems, and the optical imaging system is by object side to image side It successively include: the first lens, the second lens, the third lens, the 4th lens, the 5th lens, the 6th lens and the 7th lens, In, the first lens have positive light coke；Second lens have negative power；At least one of first lens to the 7th lens are saturating Mirror has non-rotationally-symmetric aspherical；And the 4th lens effective focal length f4 and the second lens effective focal length f2 meet 0.5 ﹤ f4/f2 ﹤ 2.0.

Another aspect, this application provides such a optical imaging systems, and the optical imaging system is by object side to image side It successively include: the first lens, the second lens, the third lens, the 4th lens, the 5th lens, the 6th lens and the 7th lens, In, the first lens have positive light coke；Second lens have negative power；At least one of first lens to the 7th lens are saturating Mirror has non-rotationally-symmetric aspherical；And the 6th lens effective focal length f6 and the Y direction of optical imaging system have It imitates focal length fy and meets 2.0 ﹤ f6/fy ﹤ 4.0.

Another aspect, this application provides such a optical imaging systems, and the optical imaging system is by object side to image side It successively include: the first lens, the second lens, the third lens, the 4th lens, the 5th lens, the 6th lens and the 7th lens, In, the first lens have positive light coke；Second lens have negative power；At least one of first lens to the 7th lens are saturating Mirror has non-rotationally-symmetric aspherical；And the 7th lens effective focal length f7 and the second lens effective focal length f2 meet 1.0 ﹤ f7/f2 ﹤ 2.0.

Another aspect, this application provides such a optical imaging systems, and the optical imaging system is by object side to image side It successively include: the first lens, the second lens, the third lens, the 4th lens, the 5th lens, the 6th lens and the 7th lens, In, the first lens have positive light coke；Second lens have negative power；At least one of first lens to the 7th lens are saturating Mirror has non-rotationally-symmetric aspherical；And first distance TTL on lens object side to the axis of imaging surface and optical imagery system The effective focal length fy of the Y direction of system meets TTL/fy ﹤ 1.0.

Another aspect, this application provides such a optical imaging systems, and the optical imaging system is by object side to image side It successively include: the first lens, the second lens, the third lens, the 4th lens, the 5th lens, the 6th lens and the 7th lens, In, the first lens have positive light coke；Second lens have negative power；At least one of first lens to the 7th lens are saturating Mirror has non-rotationally-symmetric aspherical；And the 6th lens object side radius of curvature R 11 and the 6th lens image side surface song Rate radius R12 meets 1.0 ﹤ R11/R12 ﹤ 2.0.

Another aspect, this application provides such a optical imaging systems, and the optical imaging system is by object side to image side It successively include: the first lens, the second lens, the third lens, the 4th lens, the 5th lens, the 6th lens and the 7th lens, In, the first lens have positive light coke；Second lens have negative power；At least one of first lens to the 7th lens are saturating Mirror has non-rotationally-symmetric aspherical；And the 4th lens object side radius of curvature R 7 and the 7th lens object side curvature Radius R13 meets 1.0 ﹤ R7/R13 ﹤ 2.5.

Another aspect, this application provides such a optical imaging systems, and the optical imaging system is by object side to image side It successively include: the first lens, the second lens, the third lens, the 4th lens, the 5th lens, the 6th lens and the 7th lens, In, the first lens have positive light coke；Second lens have negative power；At least one of first lens to the 7th lens are saturating Mirror has non-rotationally-symmetric aspherical；And effective focal length fx and the first lens object side of the X-direction of optical imaging system The radius of curvature R 1 in face meets 4.0 ﹤ fx/R1 ﹤ 4.5.

Another aspect, this application provides such a optical imaging systems, and the optical imaging system is by object side to image side It successively include: the first lens, the second lens, the third lens, the 4th lens, the 5th lens, the 6th lens and the 7th lens, In, the first lens have positive light coke；Second lens have negative power；At least one of first lens to the 7th lens are saturating Mirror has non-rotationally-symmetric aspherical；And second lens image side surface radius of curvature R 4 and optical imaging system X-axis side To effective focal length fx meet 0 ﹤ R4/fx ﹤ 1.5.

Another aspect, this application provides such a optical imaging systems, and the optical imaging system is by object side to image side It successively include: the first lens, the second lens, the third lens, the 4th lens, the 5th lens, the 6th lens and the 7th lens, In, the first lens have positive light coke；Second lens have negative power；At least one of first lens to the 7th lens are saturating Mirror has non-rotationally-symmetric aspherical；And first airspace T12, the second lens on optical axis of lens and the second lens With airspace T34 of airspace T23, the third lens and fourth lens of the third lens on optical axis on optical axis, the 4th The airspace T56 of airspace T45 and the 5th lens and the 6th lens on optical axis of lens and the 5th lens on optical axis Meet 1.5 ﹤ (T12+T23+T34+T45)/T56 ﹤ 2.5.

The application uses multi-disc (for example, seven) 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 long-focus, good At least one beneficial effect such as image quality and low sensitivity.In addition, free form surface is that one kind is non-rotationally-symmetric aspherical, this Apply rotational symmetry it is aspherical on the basis of, increase non-rotational symmetry component, i.e., introduce free form surface in lens system, Be conducive to simultaneously effectively correct meridian aberration outside axis and sagitta of arc aberration, also have greatly to the performance of optical lens group Promote facilitation.

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；And

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

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.Unless otherwise stated, this Each mark of reference (for example, radius of curvature or focal power etc.) in text in addition to the mark of reference for being related to visual field is indicated along optics The characteristic parameter value of the Y direction of imaging system.For example, in case of no particular description, conditional " R1/R10 " indicates The radius of curvature of the Y direction of the image side surface of the radius of curvature R 1y and the 5th lens of the Y direction of the object side of first lens The ratio of R10y.

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 seven lens with focal power, That is, the first lens, the second lens, the third lens, the 4th lens, the 5th lens, the 6th lens and the 7th lens.This seven lens 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 positive light coke；Second lens can have negative power；Third Lens can have positive light coke or negative power；4th lens can have negative power；5th lens can have positive light coke or Negative power；6th lens can have positive light coke；7th lens can have negative power.

It can be set as by the object side and/or image side surface of at least one lens by the first lens into the 7th lens It is non-rotationally-symmetric aspherical, further to promote image quality.It is non-rotationally-symmetric it is aspherical be a kind of free form surface, rotation pair Claim it is aspherical on the basis of, increase non-rotational symmetry component, thus introduce in lens system non-rotationally-symmetric aspherical Be conducive to by being effectively corrected to meridian aberration outside axis and sagitta of arc aberration, greatly the performance of improving optical system.

In the exemplary embodiment, the first lens can have positive light coke, and object side can be convex surface, and image side surface can be Convex surface.

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

In the exemplary embodiment, the 4th lens can have negative power, and object side can be concave surface, and image side surface can be Concave surface.

In the exemplary embodiment, the 6th lens can have positive light coke, and object side can be concave surface, and image side surface can be Convex surface.

In the exemplary embodiment, the object side of the 7th lens can be concave surface.

In the exemplary embodiment, the optical imaging system of the application can meet conditional TTL/fx ﹤ 1, wherein TTL For distance on the first lens object side to the axis of imaging surface, fx is the effective focal length of the X-direction of optical imaging system.More specifically Ground, TTL and fx can further meet TTL/fx≤0.91.The focal power of reasonable disposition lens system and the first lens object side are extremely Distance TTL on the axis of imaging surface is conducive to correct optical lens group off-axis aberration, improves image quality.On this basis, pass through Introduce non-rotationally-symmetric aspherical, meridian aberration outside the axis of pick-up lens and sagitta of arc aberration corrected, can obtain into The image quality of one step is promoted.

In the exemplary embodiment, the optical imaging system of the application can meet 2.0 ﹤ fx/f1 ﹤ 3.0 of conditional, In, fx is the effective focal length of the X-direction of optical imaging system, and f1 is the effective focal length of the first lens.More specifically, fx and f1 2.39≤fx/f1≤2.52 can further be met.By controlling the effective focal length fx of the X-direction of optical imaging system, by the Thus the control of one power of lens controls the whole focal length of imaging lens in zone of reasonableness, while having the work of the balance curvature of field With.

In the exemplary embodiment, the optical imaging system of the application can meet 0.5 ﹤ f4/f2 ﹤ 2.0 of conditional, In, f4 is the effective focal length of the 4th lens, and f2 is the effective focal length of the second lens.More specifically, f4 and f2 can further meet 0.90≤f4/f2≤1.18.By the focal length of reasonable distribution the second lens and the 4th lens, be conducive to the spherical aberration of improvement system, Also it is conducive to the color difference of improvement system simultaneously.

In the exemplary embodiment, the optical imaging system of the application can meet 2.0 ﹤ f6/fy ﹤ 4.0 of conditional, In, f6 is the effective focal length of the 6th lens, and fy is the effective focal length of Y direction.More specifically, f6 and fy can further meet 3.25≤f6/fy≤3.74.Pass through the effective focal length fy of the Y direction of reasonable distribution optical imaging system and the coke of the 6th lens Away from the focal power of imaging system back segment is controlled in smaller range, can reduce the deflection angle of light, to reduce imaging system Sensibility.

In the exemplary embodiment, the optical imaging system of the application can meet 1.0 ﹤ f7/f2 ﹤ 2.0 of conditional, In, f7 is the effective focal length of the 7th lens, and f2 is the effective focal length of the second lens.More specifically, f7 and f2 can further meet 1.07≤f7/f2≤1.54.By controlling the effective focal length of the second lens and the 7th lens, the paraxial model of image planes can be effectively corrected The distortion enclosed, to improve the image quality of system.

In the exemplary embodiment, the optical imaging system of the application can meet conditional TTL/fy ﹤ 1.0, wherein TTL is distance on the first lens object side to the axis of imaging surface, and fy is the effective focal length of the Y direction of optical imaging system.More Specifically, TTL and fy can further meet TTL/fy≤0.90.The effective focal length fy and the first lens of reasonable disposition Y direction Distance TTL can reduce angle of incidence of light, reduce optical aberration on object side to the axis of imaging surface, to promote the solution picture of camera lens Power.

In the exemplary embodiment, the optical imaging system of the application can meet 1.0 ﹤ R11/R12 ﹤ 2.0 of conditional, In, R11 is the radius of curvature of the 6th lens object side, and R12 is the radius of curvature of the 6th lens image side surface.More specifically, R11 and R12 can further meet 1.20≤R11/R12≤1.25.Imaging is efficiently controlled by controlling the overbending direction of the 6th lens The curvature of field of system, the image quality of lifting system.

In the exemplary embodiment, the optical imaging system of the application can meet 1.0 ﹤ R7/R13 ﹤ 2.5 of conditional, In, R7 is the radius of curvature of the 4th lens object side, and R13 is the radius of curvature of the 7th lens object side.More specifically, R7 and R13 can further meet 1.12≤R7/R13≤2.22.By the radius of curvature and the 7th lens that control the 4th lens object side The radius of curvature of object side, can correct the color difference of imaging system, and can be realized the balance of various differences.

In the exemplary embodiment, the optical imaging system of the application can meet 4.0 ﹤ fx/R1 ﹤ 4.5 of conditional, In, fx is the effective focal length of the X-direction of optical imaging system, and R1 is the radius of curvature of the first lens object side.More specifically, Fx and R1 can further meet 4.10≤fx/R1≤4.22.By the effective focal length fx and the first lens object side that control X-direction The radius of curvature R 1 in face, can reduce coma, promote the resolving power of camera lens.

In the exemplary embodiment, the optical imaging system of the application can meet 0 ﹤ R4/fx ﹤ 1.5 of conditional, wherein R4 is the radius of curvature of the second lens image side surface, and fx is the effective focal length of the X-direction of optical imaging system.More specifically, R4 0.49≤R4/fx≤1.14 can further be met with fx.By meeting above-mentioned relation, system can be guaranteed to lens strength Reasonable distribution improves the influence of the spherical aberration, coma of system to image quality.

In the exemplary embodiment, the optical imaging system of the application can meet 1.5 ﹤ (T12+T23+T34+ of conditional T45)/T56 ﹤ 2.5, wherein T12 is the airspace of the first lens and the second lens on optical axis, and T23 is the second lens and the Airspace of three lens on optical axis, T34 are the airspace of the third lens and the 4th lens on optical axis, and T45 is the 4th The airspace of lens and the 5th lens on optical axis, T56 are the airspace of the 5th lens and the 6th lens on optical axis.More Specifically, T12, T23, T34, T45 and T56 can further meet 1.68≤(T12+T23+T34+T45)/T56≤2.00.Rationally Control the first lens and the second lens, the second lens and the third lens, the 4th lens and the 5th lens and the 5th lens and Airspace T12, T34, T45 and the T56 of six lens on optical axis, facilitate lens dimension and are evenly distributed, and guarantee assemble stable Property, and reduce the aberration of entire optical imaging lens, shorten the overall length of optical imaging lens.

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 at before the first 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 seven 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, can effectively reduce camera lens volume, reduce camera lens susceptibility and improve image quality.In addition, non-rotating by introducing It is symmetrical aspherical, meridian aberration outside the axis of optical imaging system and sagitta of arc aberration are corrected, can be obtained further Image quality is 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, in the first lens, the second lens, the third lens, the 4th lens, the 5th lens, the 6th lens and the 7th lens At least one of the object side of each lens and image side surface can be aspherical.Optionally, the first lens, the second lens, third Lens, the 4th lens, the object side of the 5th lens and each lens in the 6th lens and image side surface can be aspherical.

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: diaphragm STO, the first lens E1, the second lens E2, the third lens E3, the 4th lens E4, the 5th lens E5, the 6th thoroughly Mirror E6, the 7th lens E7, optical filter E8 and imaging surface S17.

First lens E1 has positive light coke, and object side S1 is convex surface, and image side surface S2 is convex 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 positive light coke, and object side S5 is Convex surface, image side surface S6 are convex surface.4th lens E4 has negative power, and object side S7 is concave surface, and image side surface S8 is concave surface.The Five lens E5 have negative power, and object side S9 is concave 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.7th lens E7 has negative power, and object side S13 is concave surface, as Side S14 is convex surface.Optical filter E8 has object side S15 and image side surface S16.Light from object sequentially passes through each surface S1 extremely S16 is simultaneously ultimately imaged on imaging surface S17.

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, refractive index, abbe number, circular cone coefficient X and circular cone coefficient Y, wherein radius of curvature X, radius of curvature Y and thickness Unit is millimeter (mm).

Table 1

As shown in Table 1, the first lens E1, the second lens E2, the third lens E3, the 4th lens E4, the 5th lens E5 and The object side S13 of the object side of any one lens and image side surface and the 7th lens E7 is aspherical in six lens E6.? In the present embodiment, the face type x of each non-spherical lens is available but is not limited to following aspherical formula and is 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 S1-S12, S13₄、A₆、A₈、A₁₀、A₁₂、A₁₄、A₁₆、A₁₈And A₂₀。

Table 2

By table 1 it can also be seen that the image side surface S14 of the 7th lens E7 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 in z-axis direction；CUX, CUY are respectively the curvature of X, Y-direction vertex of surface；KX, KY is respectively X, Y-direction circular cone coefficient；AR, BR, CR, DR, ER, FR, GR, HR, JR are respectively in aspherical rotational symmetry component 4 ranks, 6 ranks, 8 ranks, 10 ranks, 12 ranks, 14 ranks, 16 ranks, 18 ranks, 20 level numbers；AP, BP, CP, DP, EP, FP, GP, HP, JP points It Wei not 4 ranks, 6 ranks, 8 ranks, 10 ranks, 12 ranks, 14 ranks, 16 ranks, 18 ranks, 20 level numbers in aspherical non-rotational symmetry component.

The following table 3 give the AR, BR that can be used for the non-rotationally-symmetric aspherical S14 in embodiment 1, CR, DR, ER, FR, GR, HR, JR coefficient.

Table 3

The following table 4 give the AP, BP that can be used for the non-rotationally-symmetric aspherical S14 in embodiment 1, CP, DP, EP, FP, GP, HP, JP coefficient.

The face AAS

AP

BP

CP

DP

EP

FP

GP

HP

JP

S14

4.1175E-03

6.1941E-04

7.3571E-05

-1.2393E-05

-6.3394E-06

8.5186E-06

-5.4948E-06

-6.3077E-05

0.0000E+00

Table 4

Table 5 gives effective coke of the effective focal length f1 to f7 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 The F-number Fno of half ImgH, maximum angle of half field-of view Semi-FOV and optical imaging system.

f1(mm)	2.84	fx(mm)	7.17
				f2(mm)	-5.32	fy(mm)	7.19
f3(mm)	14.84	TTL(mm)	6.32
				f4(mm)	-6.29	ImgH(mm)	3.10
f5(mm)	-31.24	Semi-FOV(°)	23.4
				f6(mm)	26.04	Fno	2.65
f7(mm)	-8.17

Table 5

Optical imaging system in embodiment 1 meets:

TTL/fx=0.88, wherein TTL is distance on the first lens object side to the axis of imaging surface, and fx is optical imagery The effective focal length of system X-direction；

Fx/f1=2.52, wherein fx is the effective focal length of X-direction, and f1 is the effective focal length of the first lens；

F4/f2=1.18, wherein f4 is the effective focal length of the 4th lens, and f2 is the effective focal length of the second lens；

F6/fy=3.62, wherein f6 is the effective focal length of the 6th lens, and fy is the effective of optical imaging system Y direction Focal length；

F7/f2=1.54, wherein f7 is the effective focal length of the 7th lens, and f2 is the effective focal length of the second lens；

TTL/fy=0.88, wherein TTL is distance on the first lens object side to the axis of imaging surface, and fy is optical imagery The effective focal length of system Y direction；

R11/R12=1.22, wherein R11 is the radius of curvature of the 6th lens object side, and R12 is the 6th lens image side surface Radius of curvature；

R7/R13=1.63, wherein R7 is the radius of curvature of the 4th lens object side, and R13 is the 7th lens object side Radius of curvature；

Fx/R1=4.22, wherein fx is the effective focal length of X-direction, and R1 is the radius of curvature of the first lens object side；

R4/fx=0.84, wherein R4 is the radius of curvature of the second lens image side surface, and fx is the effective focal length of X-direction；

(T12+T23+T34+T45)/T56=1.68, wherein T12 is the sky of the first lens and the second lens on optical axis Gas interval, T23 are the airspace of the second lens and the third lens on optical axis, and T34 is the third lens and the 4th lens in light Airspace on axis, T45 are the airspace of the 4th lens and the 5th lens on optical axis, and T56 is the 5th lens and the 6th Airspace of the lens on optical axis.

At Fig. 2 shows the RMS spot diameters of the optical imaging system of embodiment 1 in first quartile different image heights position Size cases.As can be seen from FIG. 2, optical imaging system given by embodiment 1 has long-focus, good image quality and low The characteristics of susceptibility.

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: diaphragm STO, the first lens E1, the second lens E2, the third lens E3, the 4th lens E4, the 5th lens E5, the 6th thoroughly Mirror E6, the 7th lens E7, optical filter E8 and imaging surface S17.

First lens E1 has positive light coke, and object side S1 is convex surface, and image side surface S2 is convex 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 positive light coke, and object side S5 is Convex surface, image side surface S6 are concave surface.4th lens E4 has negative power, and object side S7 is concave surface, and image side surface S8 is concave surface.The Five lens E5 have positive light coke, and object side S9 is concave 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.7th lens E7 has negative power, and object side S13 is concave surface, as Side S14 is convex surface.Optical filter E8 has object side S15 and image side surface S16.Light from object sequentially passes through each surface S1 extremely S16 is simultaneously ultimately imaged on imaging surface S17.

Table 6 show the surface types of each lens of the optical imaging system of embodiment 2, radius of curvature X, radius of curvature Y, Thickness, refractive index, abbe number, circular cone coefficient X and circular cone coefficient Y, wherein radius of curvature X, radius of curvature Y and thickness Unit is millimeter (mm).

Table 6

As shown in Table 6, in example 2, the first lens E1, the second lens E2, the third lens E3, the 4th lens E4, The image side surface S14 of the object side of any one lens and image side surface and the 7th lens E7 is equal in five lens E5 and the 6th lens E6 It is aspherical；The object side S13 of 7th lens E7 is non-rotationally-symmetric aspherical.

Table 7 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 8 and table 9 show can be used for it is non-rotationally-symmetric non-in embodiment 2 The rotational symmetry component of Spherical Surface S 13 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.

Table 7

Table 8

Table 9

Table 10 gives effective coke of the effective focal length f1 to f7 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 The F-number of the half ImgH of effective pixel area diagonal line length, maximum angle of half field-of view Semi-FOV and optical imaging system Fno。

f1(mm)	3.00	fx(mm)	7.18
				f2(mm)	-5.22	fy(mm)	7.20
f3(mm)	11.88	TTL(mm)	6.33
				f4(mm)	-6.15	ImgH(mm)	3.10
f5(mm)	688.25	Semi-FOV(°)	23.3
				f6(mm)	25.75	Fno	2.65
f7(mm)	-7.06

Table 10

Fig. 4 shows the RMS spot diameter of the optical imaging system of embodiment 2 in first quartile at different image heights position Size cases.As can be seen from FIG. 4, optical imaging system given by embodiment 2 has long-focus, good image quality and low The characteristics of susceptibility.

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 is shown according to this Apply for the structural schematic diagram of the optical imaging system of embodiment 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: diaphragm STO, the first lens E1, the second lens E2, the third lens E3, the 4th lens E4, the 5th lens E5, the 6th thoroughly Mirror E6, the 7th lens E7, optical filter E8 and imaging surface S17.

First lens E1 has positive light coke, and object side S1 is convex surface, and image side surface S2 is convex 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 positive light coke, and object side S5 is Convex surface, image side surface S6 are convex surface.4th lens E4 has negative power, and object side S7 is concave 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 concave surface.6th lens E6 has positive light coke, Its object side S11 is concave surface, and image side surface S12 is convex surface.7th lens E7 has negative power, and object side S13 is concave surface, as Side S14 is convex surface.Optical filter E8 has object side S15 and image side surface S16.Light from object sequentially passes through each surface S1 extremely S16 is simultaneously ultimately imaged on imaging surface S17.

Table 11 shows the surface type of each lens of the optical imaging system of embodiment 3, radius of curvature X, radius of curvature Y, thickness, refractive index, abbe number, circular cone coefficient X and circular cone coefficient Y, wherein radius of curvature X, radius of curvature Y and thickness Unit be millimeter (mm).

Table 11

As shown in Table 11, in embodiment 3, the first lens E1, the second lens E2, the third lens E3, the 4th lens E4, The object side S11 of the object side of any one lens and image side surface and the 6th lens E6 is equal in five lens E5 and the 7th lens E7 It is aspherical；The image side surface S12 of 6th lens E6 is non-rotationally-symmetric aspherical.

Table 12 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 13 and table 14 show can be used for it is non-rotationally-symmetric in embodiment 3 The rotational symmetry component of aspherical 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

S1

3.6632E-02

-1.8385E-03

-1.9460E-03

-6.3518E-04

-1.5859E-04

-1.5167E-05

9.4692E-06

5.2528E-06

-5.5643E-07

S2

5.0736E-03

7.8666E-04

-1.2892E-03

3.5093E-04

-1.1403E-04

7.0827E-05

-1.9915E-05

9.5920E-06

-6.0152E-06

S3

6.7395E-02

8.8295E-03

-1.9169E-04

7.9708E-04

-1.0662E-04

9.5782E-05

-3.7837E-05

8.3556E-06

-6.0852E-06

S4

3.8074E-02

6.8104E-03

1.2176E-03

7.5825E-04

1.5564E-04

1.2450E-04

2.2340E-05

1.3206E-05

-6.1156E-07

S5

-1.0774E-01

-1.4672E-02

1.9966E-03

1.2825E-04

-1.4326E-04

4.9193E-05

-5.1347E-06

-1.5600E-05

-4.5002E-06

S6

-1.5695E-02

-1.3342E-02

9.1059E-04

-2.1127E-05

-2.7472E-05

8.9932E-05

-3.0452E-05

-1.1867E-05

1.3211E-06

S7

2.0234E-01

5.5366E-03

-4.3920E-03

1.4022E-04

-8.5300E-05

7.3028E-05

-3.6644E-05

3.8373E-06

-8.7566E-07

S8

9.9406E-02

1.6913E-02

-3.4688E-03

-8.3355E-06

-2.3159E-04

5.1526E-05

-1.0170E-05

6.2593E-06

-2.9272E-06

S9

-1.6032E-01

-5.7542E-03

-5.0999E-03

-7.9367E-04

-3.5967E-04

-1.7170E-04

-5.1212E-05

-2.2975E-05

-4.5804E-06

S10

-1.4061E-01

-1.5387E-02

-7.9983E-03

-2.1468E-04

-4.5008E-04

-1.7727E-04

2.9550E-06

-1.2622E-05

8.5439E-07

S11

1.3237E-01

9.3748E-03

-1.2629E-02

1.2443E-02

5.9960E-03

-1.0305E-03

1.5196E-04

-1.8704E-04

-1.0041E-04

S13

-5.7638E-02

1.2759E-01

-4.5083E-02

-8.2141E-03

1.1669E-04

-1.0731E-03

2.5072E-03

-1.8907E-03

7.7543E-04

S14

-4.9038E-01

9.5431E-02

-5.2433E-02

1.0621E-02

-2.1562E-02

6.9466E-03

-2.4994E-03

1.3511E-04

7.9192E-05

Table 12

Table 13

Table 14

Table 15 gives effective coke of the effective focal length f1 to f7 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 The F-number of the half ImgH of effective pixel area diagonal line length, maximum angle of half field-of view Semi-FOV and optical imaging system Fno。

f1(mm)	3.00	fx(mm)	7.19
				f2(mm)	-4.81	fy(mm)	7.20
f3(mm)	7.28	TTL(mm)	6.33
				f4(mm)	-5.05	ImgH(mm)	3.08
f5(mm)	280.89	Semi-FOV(°)	23.2
				f6(mm)	23.43	Fno	2.65
f7(mm)	-7.03

Table 15

Fig. 6 shows the RMS spot diameter of the optical imaging system of embodiment 3 in first quartile at different image heights position Size cases.As can be seen from FIG. 6, optical imaging system given by embodiment 3 has long-focus, good image quality and low The characteristics of susceptibility.

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 is shown according to this Apply for the structural schematic diagram of the optical imaging system of embodiment 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: diaphragm STO, the first lens E1, the second lens E2, the third lens E3, the 4th lens E4, the 5th lens E5, the 6th thoroughly Mirror E6, the 7th lens E7, optical filter E8 and imaging surface S17.

First lens E1 has positive light coke, and object side S1 is convex surface, and image side surface S2 is convex 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 negative power, and object side S7 is concave surface, and image side surface S8 is concave surface.The Five lens E5 have positive light coke, and object side S9 is concave 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.7th lens E7 has negative power, and object side S13 is concave surface, as Side S14 is convex surface.Optical filter E8 has object side S15 and image side surface S16.Light from object sequentially passes through each surface S1 extremely S16 is simultaneously ultimately imaged on imaging surface S17.

Table 16 shows the surface type of each lens of the optical imaging system of embodiment 4, radius of curvature X, radius of curvature Y, thickness, refractive index, abbe number, circular cone coefficient X and circular cone coefficient Y, wherein radius of curvature X, radius of curvature Y and thickness Unit be millimeter (mm).

Table 16

As shown in Table 16, in example 4, the first lens E1, the third lens E3, the 4th lens E4, the 5th lens E5 and The object side of any one lens and image side surface, the object side S3 of the second lens E2 and the 7th lens E7 in 6th lens E6 Object side S13 is aspherical；The image side surface S14 of the image side surface S4 and the 7th lens E7 of second lens E2 are non-rotationally-symmetric It is aspherical.

Table 17 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 18 to table 21 show can be used for it is non-rotationally-symmetric in embodiment 4 The rotational symmetry component of aspherical S4 and S14 and the higher order coefficient of non-rotational symmetry component, wherein non-rotationally-symmetric aspheric Face 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

S1

3.7940E-02

-1.2176E-03

-1.9646E-03

-7.0219E-04

-1.6248E-04

-1.8083E-05

7.7262E-06

1.4944E-06

8.4461E-07

S2

-4.9782E-03

1.1253E-03

-5.7287E-04

1.6218E-04

2.0265E-05

1.7974E-05

8.4518E-08

-3.9902E-07

-2.5099E-07

S3

5.5349E-02

7.6840E-03

1.3550E-03

2.8911E-04

7.1633E-05

2.8790E-05

8.5761E-07

-1.3084E-06

1.7764E-06

S5

-7.4490E-02

-9.8824E-03

1.2065E-03

2.5338E-05

-1.1083E-04

1.5018E-07

7.4707E-06

-6.9295E-06

2.0194E-06

S6

2.8792E-03

-7.5756E-03

-1.4522E-03

7.1270E-04

-9.0398E-05

-4.8050E-06

6.1730E-06

-3.3783E-06

-2.1769E-06

S7

1.4660E-01

4.1610E-03

-4.9893E-03

9.7243E-04

-1.7579E-04

1.0613E-05

-3.7755E-06

2.2876E-06

-1.0431E-06

S8

8.8099E-02

1.1852E-02

-2.6026E-03

4.3269E-04

-2.5240E-04

4.3463E-05

-6.0462E-06

2.9041E-06

-1.6996E-06

S9

-1.1775E-01

-1.2643E-02

-4.4590E-03

-1.5828E-04

-1.7165E-04

-8.6057E-05

-1.3039E-05

-1.1452E-05

-1.3003E-06

S10

-9.8906E-02

-2.1307E-02

-7.8678E-03

6.6936E-04

-8.9819E-04

-2.2653E-04

5.3085E-06

-3.9148E-05

-1.2542E-06

S11

2.9532E-01

1.2303E-02

-1.9742E-02

1.2967E-02

6.0588E-03

3.6823E-04

1.3453E-03

-3.2553E-04

-2.0944E-05

S12

1.1877E-01

5.5438E-02

-3.4839E-03

-8.6440E-03

1.8391E-02

-2.8554E-03

4.1638E-03

-2.7198E-05

1.6755E-04

S13

-1.5661E-01

1.3383E-01

-3.3693E-02

-1.9002E-02

6.2586E-03

-3.7742E-03

3.1254E-03

-1.5291E-03

5.9152E-04

Table 17

Table 18

Table 19

Table 20

Table 21

Table 22 gives effective coke of the effective focal length f1 to f7 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 The F-number of the half ImgH of effective pixel area diagonal line length, maximum angle of half field-of view Semi-FOV and optical imaging system Fno。

f1(mm)	2.90	fx(mm)	7.15
				f2(mm)	-6.87	fy(mm)	7.18
f3(mm)	-35459.41	TTL(mm)	6.35
				f4(mm)	-6.16	ImgH(mm)	3.10
f5(mm)	54.55	Semi-FOV(°)	23.3
				f6(mm)	24.95	Fno	2.62
f7(mm)	-7.33

Table 22

Fig. 8 shows the RMS spot diameter of the optical imaging system of embodiment 4 in first quartile at different image heights position Size cases.As can be seen from FIG. 8, optical imaging system given by embodiment 4 has long-focus, good image quality and low The characteristics of susceptibility.

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: diaphragm STO, the first lens E1, the second lens E2, the third lens E3, the 4th lens E4, the 5th lens E5, the 6th thoroughly Mirror E6, the 7th lens E7, optical filter E8 and imaging surface S17.

First lens E1 has positive light coke, and object side S1 is convex surface, and image side surface S2 is convex 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 positive light coke, and object side S5 is Convex surface, image side surface S6 are convex surface.4th lens E4 has negative power, and object side S7 is concave surface, and image side surface S8 is concave surface.The Five lens E5 have positive light coke, and object side S9 is concave 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.7th lens E7 has negative power, and object side S13 is concave surface, as Side S14 is concave surface.Optical filter E8 has object side S15 and image side surface S16.Light from object sequentially passes through each surface S1 extremely S16 is simultaneously ultimately imaged on imaging surface S17.

Table 23 shows the surface type of each lens of the optical imaging system of embodiment 5, radius of curvature X, radius of curvature Y, thickness, refractive index, abbe number, circular cone coefficient X and circular cone coefficient Y, wherein radius of curvature X, radius of curvature Y and thickness Unit be millimeter (mm).

Table 23

As shown in Table 23, in embodiment 5, the first lens E1, the second lens E2, the third lens E3, the 4th lens E4, The object side S13 of the object side of any one lens and image side surface and the 7th lens E7 is equal in five lens E5 and the 6th lens E6 It is aspherical；The image side surface S14 of 7th lens E7 is non-rotationally-symmetric aspherical.

Table 24 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 25 and table 26 show can be used for it is non-rotationally-symmetric in embodiment 5 The rotational symmetry component of aspherical S14 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.

Table 24

The face AAS

AR

BR

CR

DR

ER

FR

GR

HR

S14

-1.3036E-01

1.2161E-01

-7.0533E-02

2.4047E-02

-5.0319E-03

6.4073E-04

-4.5570E-05

1.3826E-06

Table 25

The face AAS

AP

BP

CP

DP

EP

FP

GP

HP

S14

-2.9109E-04

3.5608E-06

2.0668E-05

2.8542E-06

-1.8728E-06

1.7422E-06

4.1494E-06

0.0000E+00

Table 26

Table 27 gives effective coke of the effective focal length f1 to f7 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 The F-number of the half ImgH of effective pixel area diagonal line length, maximum angle of half field-of view Semi-FOV and optical imaging system Fno。

f1(mm)	2.89	fx(mm)	6.99
				f2(mm)	-5.17	fy(mm)	7.07
f3(mm)	11.21	TTL(mm)	6.33
				f4(mm)	-5.56	ImgH(mm)	3.27
f5(mm)	81.09	Semi-FOV(°)	24.9
				f6(mm)	26.43	Fno	2.67
f7(mm)	-6.51

Table 27

Figure 10 shows the RMS spot diameter of the optical imaging system of the embodiment 5 different image heights position in first quartile The size cases at place.As can be seen from FIG. 10, optical imaging system given by embodiment 5 has long-focus, good image quality And the characteristics of low sensitivity.

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: diaphragm STO, the first lens E1, the second lens E2, the third lens E3, the 4th lens E4, the 5th lens E5, the 6th thoroughly Mirror E6, the 7th lens E7, optical filter E8 and imaging surface S17.

First lens E1 has positive light coke, and object side S1 is convex surface, and image side surface S2 is convex 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 positive light coke, and object side S5 is Convex surface, image side surface S6 are convex surface.4th lens E4 has negative power, and object side S7 is concave surface, and image side surface S8 is concave surface.The Five lens E5 have negative power, and object side S9 is concave 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.7th lens E7 has negative power, and object side S13 is concave surface, as Side S14 is concave surface.Optical filter E8 has object side S15 and image side surface S16.Light from object sequentially passes through each surface S1 extremely S16 is simultaneously ultimately imaged on imaging surface S17.

Table 28 shows the surface type of each lens of the optical imaging system of embodiment 6, radius of curvature X, radius of curvature Y, thickness, refractive index, abbe number, circular cone coefficient X and circular cone coefficient Y, wherein radius of curvature X, radius of curvature Y and thickness Unit be millimeter (mm).

Table 28

As shown in Table 28, in embodiment 6, the first lens E1, the second lens E2, the third lens E3, the 4th lens E4, The object side S13 of the object side of any one lens and image side surface and the 7th lens E7 is equal in five lens E5 and the 6th lens E6 It is aspherical；The image side surface S14 of 7th lens E7 is non-rotationally-symmetric aspherical.

Table 29 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 30 and table 31 show can be used for it is non-rotationally-symmetric in embodiment 6 The rotational symmetry component of aspherical S14 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

S1

3.5653E-02

4.0253E-04

-7.3438E-04

-1.8298E-04

0.0000E+00

0.0000E+00

0.0000E+00

0.0000E+00

S2

4.3398E-03

3.5701E-03

-1.1541E-04

7.7144E-05

0.0000E+00

0.0000E+00

0.0000E+00

0.0000E+00

S3

4.6141E-02

7.6462E-03

6.3554E-04

-7.8457E-05

1.6706E-05

-5.9066E-06

-2.3385E-06

-1.2024E-06

S4

1.7199E-02

-3.3567E-04

4.5537E-04

-2.6972E-04

-6.5014E-05

-1.5184E-05

-4.7028E-06

-1.2280E-06

S5

-7.8191E-02

-1.0949E-02

1.2034E-03

-1.1552E-05

-1.6410E-04

-1.1879E-05

0.0000E+00

0.0000E+00

S6

1.2357E-02

-5.9812E-03

-2.2725E-03

5.9969E-04

-5.0015E-05

-2.5904E-05

0.0000E+00

0.0000E+00

S7

1.3759E-01

6.6199E-03

-4.8728E-03

7.8941E-04

-2.1200E-05

-2.4274E-05

0.0000E+00

0.0000E+00

S8

6.8383E-02

8.7053E-03

-1.8827E-03

1.9337E-04

-2.0606E-04

2.2775E-05

0.0000E+00

0.0000E+00

S9

-1.8792E-01

-1.9181E-02

-3.4857E-03

-2.2573E-04

-5.2858E-05

-2.5360E-05

0.0000E+00

0.0000E+00

S10

-2.3156E-01

-1.9308E-02

-1.1146E-03

4.5460E-05

-4.0325E-04

-1.4656E-04

-2.6552E-05

-1.2416E-05

S11

7.7933E-02

3.4350E-02

1.0025E-02

1.8591E-02

4.5134E-03

-1.5506E-03

3.4970E-04

-7.3548E-05

S12

3.6599E-02

8.8960E-02

2.3118E-02

3.9816E-03

1.6653E-02

-8.6957E-04

1.1682E-03

7.2828E-04

S13

-4.4722E-01

1.7548E-01

-1.3511E-02

-2.0817E-02

2.2398E-03

4.5643E-03

-2.5469E-03

7.3092E-04

Table 29

Table 30

The face AAS

AP

BP

CP

DP

EP

FP

GP

HP

S14

-2.9109E-04

3.5608E-06

2.0668E-05

2.8542E-06

-1.8728E-06

1.7422E-06

4.1494E-06

0.0000E+00

Table 31

Table 32 gives effective coke of the effective focal length f1 to f7 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 The F-number of the half ImgH of effective pixel area diagonal line length, maximum angle of half field-of view Semi-FOV and optical imaging system Fno。

f1(mm)	2.87	fx(mm)	7.01
				f2(mm)	-5.21	fy(mm)	7.07
f3(mm)	11.84	TTL(mm)	6.33
				f4(mm)	-5.91	ImgH(mm)	3.27
f5(mm)	-301.89	Semi-FOV(°)	24.9
				f6(mm)	25.92	Fno	2.67
f7(mm)	-6.57

Table 32

Figure 12 shows the RMS spot diameter of the optical imaging system of the embodiment 6 different image heights position in first quartile The size cases at place.As can be seen from FIG. 12, optical imaging system given by embodiment 6 has long-focus, good image quality And the characteristics of low sensitivity.

To sum up, embodiment 1 to embodiment 6 meets relationship shown in table 33 respectively.

Conditional/embodiment	1	2	3	4	5	6
							TTL/fx	0.88	0.88	0.88	0.89	0.91	0.90
fx/f1	2.52	2.39	2.40	2.47	2.42	2.44
							f4/f2	1.18	1.18	1.05	0.90	1.08	1.13
f6/fy	3.62	3.58	3.25	3.48	3.74	3.67
							f7/f2	1.54	1.35	1.46	1.07	1.26	1.26
TTL/fy	0.88	0.88	0.88	0.88	0.90	0.90
							R11/R12	1.22	1.22	1.25	1.22	1.20	1.21
R7/R13	1.63	1.90	1.91	2.22	1.22	1.12
							fx/R1	4.22	4.20	4.22	4.17	4.10	4.12
R4/fx	0.84	0.63	0.49	1.14	0.71	0.73
							(T12+T23+T34+T45)/T56	1.68	1.93	2.00	1.75	1.76	1.73

Table 33

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 (13)

1. optical imaging system, by object side to image side successively include: the first lens, the second lens, the third lens, the 4th lens, 5th lens, the 6th lens and the 7th lens,

It is characterized in that,

First lens have positive light coke；

Second lens have negative power；

At least one lens of first lens into the 7th lens have non-rotationally-symmetric aspherical；And

Distance TTL and the X-direction of the optical imaging system is effective on the first lens object side to the axis of imaging surface Focal length fx meets TTL/fx ﹤ 1.

2. optical imaging system according to claim 1, which is characterized in that the X-direction of the optical imaging system The effective focal length f1 of effective focal length fx and first lens meets 2.0 ﹤ fx/f1 ﹤ 3.0.

3. optical imaging system according to claim 1, which is characterized in that the effective focal length f4 of the 4th lens and institute The effective focal length f2 for stating the second lens meets 0.5 ﹤ f4/f2 ﹤ 2.0.

4. optical imaging system according to claim 1, which is characterized in that the effective focal length f6 of the 6th lens and institute The effective focal length fy for stating the Y direction of optical imaging system meets 2.0 ﹤ f6/fy ﹤ 4.0.

5. optical imaging system according to claim 1, which is characterized in that the effective focal length f7 of the 7th lens and institute The effective focal length f2 for stating the second lens meets 1.0 ﹤ f7/f2 ﹤ 2.0.

6. optical imaging system according to claim 1, which is characterized in that the first lens object side to imaging surface The effective focal length fy of the Y direction of distance TTL and the optical imaging system meets TTL/fy ﹤ 1.0 on axis.

7. optical imaging system according to claim 1, which is characterized in that the radius of curvature of the 6th lens object side The radius of curvature R 12 of R11 and the 6th lens image side surface meets 1.0 ﹤ R11/R12 ﹤ 2.0.

8. optical imaging system according to claim 1, which is characterized in that the radius of curvature of the 4th lens object side The radius of curvature R 13 of R7 and the 7th lens object side meets 1.0 ﹤ R7/R13 ﹤ 2.5.

9. optical imaging system according to claim 1, which is characterized in that the X-direction of the optical imaging system The radius of curvature R 1 of effective focal length fx and the first lens object side meets 4.0 ﹤ fx/R1 ﹤ 4.5.

10. optical imaging system according to claim 1, which is characterized in that the curvature of the second lens image side surface half The effective focal length fx of the X-direction of diameter R4 and the optical imaging system meets 0 ﹤ R4/fx ﹤ 1.5.

11. optical imaging system according to any one of claim 1 to 10, which is characterized in that first lens and Between the air of airspace T12, second lens and the third lens on optical axis of second lens on optical axis Every airspace T34, the 4th lens and the described 5th of T23, the third lens and the 4th lens on optical axis Airspace T45 of the lens on the optical axis and airspace T56 of the 5th lens and the 6th lens on optical axis is full 1.5 ﹤ of foot (T12+T23+T34+T45)/T56 ﹤ 2.5.

12. optical imaging system, by object side to image side successively include: the first lens, the second lens, the third lens, the 4th lens, 5th lens, the 6th lens and the 7th lens,

It is characterized in that,

First lens have positive light coke；

Second lens have negative power；

At least one lens of first lens into the 7th lens have non-rotationally-symmetric aspherical；And

The effective focal length fy of the Y direction of the effective focal length f6 and optical imaging system of 6th lens meets 2.0 ﹤ F6/fy ﹤ 4.0.

13. optical imaging system, by object side to image side successively include: the first lens, the second lens, the third lens, the 4th lens, 5th lens, the 6th lens and the 7th lens,

It is characterized in that,

First lens have positive light coke；

Second lens have negative power；

At least one lens of first lens into the 7th lens have non-rotationally-symmetric aspherical；And

Distance TTL and the Y direction of the optical imaging system is effective on the first lens object side to the axis of imaging surface Focal length fy meets TTL/fy ﹤ 1.0.