CN107305276A

CN107305276A - Optical lens

Info

Publication number: CN107305276A
Application number: CN201710069503.8A
Authority: CN
Inventors: 陈嘉鸿
Original assignee: Ability Enterprise Co Ltd
Current assignee: Ability Enterprise Co Ltd
Priority date: 2016-04-21
Filing date: 2017-02-08
Publication date: 2017-10-31
Anticipated expiration: 2037-02-08
Also published as: CN107305276B

Abstract

The invention discloses a kind of optical lens.Optical lens includes first lens group with diopter and second lens group with positive diopter.First lens group sequentially at least includes one from thing side to image side, and there are the first lens of positive diopter, the 3rd lens and one for having the second lens of negative diopter, one with negative diopter to have the 4th lens of positive diopter.Second lens group includes multiple lens, wherein the lens near image side are a biconvex lens.

Description

Optical lens

Technical field

The present invention relates to a kind of optical lens, and in particular to a kind of frivolous, wide-angle and the good optics of image quality Camera lens.

Background technology

In recent years, due to the rise of outdoor exercises type image capture unit, the demand for empty bat machine and wide-angle lens is carried Rise, and the thickness of optical lens is also thinning therewith, therefore, such lens design is all can have frivolous, wide-angle concurrently and have Gao Ying concurrently As for the purpose of quality.

Therefore, in order to meet the demand of high image performance now for wide-angle lens, a kind of new optics of proposition is needed badly Camera lens, the lifting image quality of optical lens and the purpose of wide-angle can be realized simultaneously.

The content of the invention

The technical problems to be solved by the invention are to provide a kind of optical lens, can realize simultaneously optical lens it is frivolous, The lifting of wide viewing angle and image quality.

To achieve these goals, the invention provides a kind of optical lens.Optical lens, which includes one, has diopter First lens group and second lens group with positive diopter.First lens group sequentially at least includes one from thing side to image side There is the second lens of negative diopter, one to have the 3rd lens and one of negative diopter by the first lens with positive diopter, one The 4th lens with positive diopter.Second lens group includes multiple lens, wherein the lens near image side have positive dioptric Degree.

According to another embodiment of the present invention, a kind of optical lens is proposed.Optical lens, which includes one, has diopter First lens group and second lens group with positive diopter.First lens group sequentially at least includes one from thing side to image side There is the second lens of negative diopter, one to have the 3rd lens and one of negative diopter by the first lens with positive diopter, one The 4th lens with positive diopter.Second lens group includes multiple lens, wherein the lens near image side are a lenticular Mirror.

According to one more embodiment of the present invention, a kind of optical lens is proposed.Optical lens includes one from thing side to image side There is the second lens of negative diopter, one there is the 3rd lens of negative diopter, one to have by the first lens with diopter, one There is the 5th lens of diopter, one there is the 6th lens of diopter, one to have diopter by 4th lens of positive diopter, one The 7th lens, one have diopter the 8th lens and one have positive diopter the 9th lens.Wherein, the 6th lens, 7th lens constitute a compound lens with the 8th lens, or the 6th lens constitute this with the 7th lens and are combined thoroughly Mirror, or the 7th lens constitute the compound lens with the 8th lens.

Below in conjunction with the drawings and specific embodiments, the present invention will be described in detail, but not as a limitation of the invention.

Brief description of the drawings

Fig. 1 illustrates the optical lens of one embodiment of the invention；

Fig. 2 illustrates the optical lens of another embodiment of the present invention；

Fig. 3 A list each lens parameter of Fig. 1 of present invention optical lens；

Fig. 3 B list the aspherical mathematical expression coefficient of Fig. 1 of present invention optical lens；

Fig. 4 A illustrate distortion (distortion) curve map of the optical lens of a Fig. 1 embodiment；

Fig. 4 B illustrate the curvature of field (field curvature) curve map of the optical lens of a Fig. 1 embodiment；

Fig. 5 illustrates the periphery brightness curve figure of the optical lens of a Fig. 1 embodiment；

Fig. 6 A list each lens parameter of Fig. 2 of present invention optical lens；

Fig. 6 B list the aspherical mathematical expression coefficient of Fig. 2 of present invention optical lens；

Fig. 7 illustrates the optical lens of another embodiment of the present invention；

Fig. 8 A list each lens parameter of Fig. 7 of present invention optical lens；

Fig. 8 B list the aspherical mathematical expression coefficient of Fig. 7 of present invention optical lens；

Fig. 9 lists the optical data of Fig. 3 A, 3B, 6A, 6B, 8A and 8B optical lens.

Embodiment

The structural principle and operation principle of the present invention are described in detail below in conjunction with the accompanying drawings：

Various embodiments of the present invention are will be described below, and coordinate schema illustratively.In addition to these detailed descriptions, this Invention can also be implemented widely in other examples, and the replacement easily of any embodiment, modification, equivalence changes are all It is included in the range of this case, and the scope of the claims after is defined.In the description of specification, in order that reader is to the present invention Having more completely understanding, there is provided many specific details；However, the present invention may be in clipped or these whole specific details On the premise of, it can still implement.Moreover, it is well known that the step of or element be not described in details, to avoid causing the present invention Unnecessary limitation.Same or similar element will be represented with same or like symbol in schema.It is specifically intended that schema Only signal is used, not representation element actual size or quantity, unless otherwise specified.

The optical lens OL1, Fig. 2 that Fig. 1 illustrates one embodiment of the invention illustrate the optics of another embodiment of the present invention Camera lens OL2.To show the feature of the present embodiment, the structure relevant with the present embodiment is only shown, remaining structure is omitted.Optics Camera lens OL1, OL2, can be wide-angle lens, and it can be applied on the device with image projecting or image acquisition function, bag Include but be not limited to, handheld communication system, empty bat machine, sports type pick-up lens, monitoring system, digital still camera, digit camera Or projector.

In one embodiment, optical lens OL1, OL2 are from thing side (object side) to image side (image-forming Side one first lens group G1 and one second lens group G2) can sequentially be included.Wherein, the first lens group G1 has diopter, example Positive diopter or negative diopter, and including multiple lens in this way；Second lens group G2 has positive diopter and compound saturating including one Mirror and multiple lens.Wherein, the first lens group G1 may include four or more lens；And compound lens can be by two Or the lens of more than two are constituted, but not to limit the present invention.

In one embodiment, the first lens group G1 includes four lens, and wherein two lens have a positive diopter, and another two Lens have negative diopter；In another embodiment, the second lens group G2 includes at least five lens, and one of lens have negative Diopter, and other lenses can have positive diopter.

Reference picture 1 and Fig. 2, the first lens group G1 sequentially include one first lens L1, one second lens from thing side to image side L2, one the 3rd lens L3 and one the 4th lens L4；Second lens group G2 sequentially includes one the 5th lens L5, one from thing side to image side 6th lens L6, one the 7th lens L7, one the 8th lens L8 and one the 9th lens L9.

Specifically, the first lens L1 can have positive diopter；Second lens L2 can have negative diopter；One the 3rd lens L3 can have negative diopter；4th lens L4 can have positive diopter；5th lens L5 can have diopter, such as positive diopter Or negative diopter；6th lens L6 can have diopter, such as positive diopter or negative diopter；7th lens L7 can have dioptric Degree, for example, bear diopter or positive diopter；8th lens L8 can have diopter, such as positive diopter or negative diopter；9th Lens L9 can have positive diopter.

In one embodiment, the 5th lens L5 and the 9th lens L9 all have positive diopter；And the 6th lens L6, the 7th lens Any one of L7 and the 8th lens L8 have negative diopter, and separately the two can then have positive diopter.For example, the 6th lens L6, Seven lens L7 and the 8th lens L8 have positive and negative and positive diopter respectively, but not to limit the present invention, the 6th lens L6, the Seven lens L7 and the 8th lens L8 can also have negative, positive and positive diopter respectively, or just, just and negative diopter.

Furthermore, as shown in figure 1, the 6th lens L6, the 7th lens L7, the 8th lens L8 may make up a compound lens and (do not mark Show)；Or, as shown in Fig. 2 the 6th lens L6 and the 7th lens L7 may make up compound lens (not indicating)；In addition, another implement Compound lens is constituted in example or by the 7th lens L7 and the 8th lens L8.Wherein, compound lens can have negative dioptric Degree.

In one embodiment, the 4th lens L4 has Abbe number V4, and V4 can meet 35≤V4,40≤V4, V4≤47.2, V4 ≤ 55, V4≤60,35≤V4≤47.2,40≤V4≤47.2,35≤V4≤55,40≤V4≤55,35≤V4≤60 and 40≤ At least one condition of the conditions such as V4≤60.

As shown in Figures 1 and 2, the 4th lens L4 is the lens near image side in the first lens group G1, but not to limit The fixed present invention.In another embodiment, one or more than one is may also include between the 4th lens L4 and the 5th lens L5 with the wrong The lens (not illustrating) of luminosity, and V4 can be the 4th lens L4 Abbe number or the 4th lens L4 and the 5th lens In the Abbe number of any lens between L5, or the first lens group G1 near image side lens Abbe number.

In one embodiment, the 9th lens L9 has an Abbe number V9, and V9 can meet 50≤V9,60≤V9,65≤V9, V9≤ 70、V9≤75、V9≤85、50≤V9≤67、60≤V9≤67、65≤V9≤67、50≤V9≤70、60≤V9≤70、65≤ V9≤70、67≤V9≤70、50≤V9≤75、60≤V9≤75、65≤V9≤75、67≤V9≤75、50≤V9≤85、60≤ At least one condition of the conditions such as V9≤85,65≤V9≤85 and 67≤V9≤85.

As shown in Figures 1 and 2, the 9th lens L9 is the lens near image side in the second lens group G2, but not to limit The fixed present invention.In another embodiment, one or more than one is may also include between the 9th lens L9 and imaging surface I has dioptric The lens (not illustrating) of degree, and V9 can be between the 9th lens L9 Abbe number or the 9th lens L9 and imaging surface I Any lens Abbe number, or in the second lens group G2 near image side lens Abbe number.

Optical lens OL1, OL2 more may include an a total focal length F and overall length TTL.In one embodiment, optical lens OL1, OL2 can meet 0≤F/TTL, 0.05≤F/TTL, 0.1≤F/TTL, F/TTL≤0.2, F/TTL≤0.25,0≤F/TTL≤ 0.25、0≤F/TTL≤0.2、0≤F/TTL≤0.17、0.05≤F/TTL≤0.25、0.05≤F/TTL≤0.2、0.05≤F/ TTL≤0.17、0.1≤F/TTL≤0.25、0.1≤F/TTL≤0.2、0.1≤F/TTL≤0.17、0.145≤F/TTL≤ At least one condition of the condition such as 0.25 and 0.145≤F/TTL≤0.2.Wherein, overall length TTL can be optical lens OL1, OL2 The lens near thing side thing side surface to imaging surface I distance.Specifically, overall length TTL be in optical lens OL1, On an OL2 optical axis OA, from the first lens group G1 thing side surface to the distance of an imaging surface I.Or, overall length TTL is first Lens L1 thing side surface S1 to imaging surface I distance.

Optical lens OL1, OL2 further include an image height Y.In one embodiment, optical lens OL1, OL2 can meet 0.8≤F/ Y、0.85≤F/Y、0.9≤F/Y、0.97≤F/Y、F/Y≤1.065、F/Y≤1.075、F/Y≤1.15、F/Y≤1.2、0.8≤ F/Y≤1.065、0.8≤F/Y≤1.075、0.8≤F/Y≤1.15、0.8≤F/Y≤1.2、0.85≤F/Y≤1.065、0.85 ≤F/Y≤1.075、0.85≤F/Y≤1.15、0.85≤F/Y≤1.2、0.9≤F/Y≤1.065、0.9≤F/Y≤1.075、 0.9≤F/Y≤1.15、0.9≤F/Y≤1.2、0.97≤F/Y≤1.065、0.97≤F/Y≤1.075、0.97≤F/Y≤ At least one condition of the condition such as 1.15 and 0.97≤F/Y≤1.2.

In one embodiment, optical lens OL1, OL2 can more meet 0.15≤d/F, 0.2≤d/F, 0.25≤d/F, d/F≤ 0.67、d/F≤0.75、d/F≤0.85、0.15≤d/F≤0.67、0.15≤d/F≤0.75、0.15≤d/F≤0.85、0.2 ≤ d/F≤0.67,0.2≤d/F≤0.75,0.2≤d/F≤0.85,0.25≤d/F≤0.67,0.25≤d/F≤0.75 with At least one condition of the conditions such as 0.25≤d/F≤0.85.Wherein, d can be between the 4th lens L4 and the second lens group G2 Distance.In other words, d is the distance between the first lens group G1 and the second lens group G2；Or, d is the 4th lens L4 picture The distance between side surface and the 5th lens L5 thing side surface.

Optical lens OL1, OL2 also have a visual angle FOV (Field of View, FOV).In one embodiment, optical lens OL1, OL2 can meet 70 °≤FOV, 90 °≤FOV, FOV≤95 °, FOV≤115 °, 70 °≤FOV≤95 °, 70 °≤FOV≤ 115 °, at least one condition of the condition such as 90 °≤FOV≤95 ° and 90 °≤FOV≤115 °.

Optical lens OL1, OL2 further include an aperture FNO.In one embodiment, optical lens OL1 can meet 0≤(FNO × TTL)/(FOV×Y)、0.1≤(FNO×TTL)/(FOV×Y)、0.15≤(FNO×TTL)/(FOV×Y)、0.16≤(FNO× TTL)/(FOV×Y)、(FNO×TTL)/(FOV×Y)≤0.211、(FNO×TTL)/(FOV×Y)≤0.3、(FNO×TTL)/ (FOV×Y)≤0.4、0≤(FNO×TTL)/(FOV×Y)≤0.211、0≤(FNO×TTL)/(FOV×Y)≤0.3、0≤ (FNO×TTL)/(FOV×Y)≤0.4、0.1≤(FNO×TTL)/(FOV×Y)≤0.211、0.1≤(FNO×TTL)/(FOV ×Y)≤0.3、0.1≤(FNO×TTL)/(FOV×Y)≤0.4、0.15≤(FNO×TTL)/(FOV×Y)≤0.211、0.15 ≤(FNO×TTL)/(FOV×Y)≤0.3、0.15≤(FNO×TTL)/(FOV×Y)≤0.4、0.16≤(FNO×TTL)/ (FOV × Y)≤0.211,0.16≤(FNO × TTL)/(FOV × Y)≤0.3 and 0.16≤(FNO × TTL)/(FOV × Y)≤ At least one condition of the condition such as 0.4.

First lens L1 thing side surface S1 can have the image side surface S2 of first curvature radius a R1, the first lens L1 can With a second curvature radius R2.In one embodiment, optical lens OL1, OL2 can meet 0.8≤│ R2/R1 │, 1≤│ R2/R1 │, 1.2≤│R2/R1│、│R2/R1│≤1.55、│R2/R1│≤2、0.8≤│R2/R1│≤1.55、0.8≤│R2/R1│≤2、1≤│ At least the one of the conditions such as R2/R1 │≤1.55,1≤│ R2/R1 │≤2,1.2≤│ R2/R1 │≤1.55 and 1.2≤│ R2/R1 │≤2 Individual condition.

- two lens L2 image side surface S4 can have one the 4th radius of curvature R 4 and an optics effective diameter Φ 4.One implements Example in, optical lens OL1, OL2 can meet 1.6≤Φ 4/R4,1.7≤Φ 4/R4,1.8≤Φ 4/R4, Φ 4/R4≤1.925, At least one condition of the conditions such as Φ 4/R4≤1.93, Φ 4/R4≤1.95 and Φ 4/R4≤2.Wherein, optics effective diameter Φ 4 It can be the second lens L2 image side surface S4 diameter.

Furthermore, in an embodiment, optical lens OL1, OL2 can meet 0.6≤D/Y, 0.7≤D/Y, 0.8≤D/Y, D/Y≤ 1.85、D/Y≤2、D/Y≤2.2、0.6≤D/Y≤1.85、0.6≤D/Y≤2、0.6≤D/Y≤2.2、0.7≤D/Y≤1.85、 The conditions such as 0.7≤D/Y≤2,0.7≤D/Y≤2.2,0.8≤D/Y≤1.85,0.8≤D/Y≤2 and 0.8≤D/Y≤2.2 are extremely A few condition.Wherein, D can be a 9th lens L9 effective external diameter, including but not limited to being that optics effective diameter, physics have Imitate footpath or external diameter.

Specifically, the 9th lens L9 can be the second lens group G2 lens near image side, but not to limit The present invention.In another embodiment, one or more than one is may also include between the 9th lens L9 and imaging surface I has diopter Lens (are not illustrated), and D can be between the 9th lens L9 effective external diameter or the 9th lens L9 and imaging surface I In effective external diameter of any lens, or the second lens group G2 near image side lens effective external diameter.

In addition, there is the first lens L1 Abbe number V1 and refractive index N1, the second lens L2 to have Abbe number V2 and refractive index N2, the 3rd lens L3 have Abbe number V3 and refractive index N3, and the 4th lens L4 has Abbe number V4 and refractive index N4, the 5th lens There is L5 Abbe number V5 and refractive index N5, the 6th lens L6 to have Abbe number V6 and refractive index N6, and the 7th lens L7 has Abbe Number V7 and refractive index N7, the 8th lens L8 have Abbe number V8 and refractive index N8, and the 9th lens L9 has Abbe number V9 and refraction Rate N9.In one embodiment, optical lens OL1, OL2 can meet N1-N3 >=0.1, N1-N3 ＞ 0, N2-N3 >=0.1, N2-N3 ＞ 0, N4-N3 >=0.1, N4-N3 ＞ 0, N7-N8 >=0.1, N7-N8 ＞ 0, N7-N6 >=0.1, N7-N6 ＞ 0, N7-N5 >=0, N5-N6 >= 0th, N9-N8 >=0.1, N9-N8 ＞ 0, V2-V1 >=0.1, V2-V1 ＞ 0, V3-V1 >=10, V3-V1 ＞ 5, V3-V4 >=10, V3-V4 ＞ 5, V8-V9 >=10, V8-V9 ＞ 5, V8-V7 >=10, V8-V7 ＞ 5, V8-V6 >=10, V8-V6 ＞ 5, V8-V5 >=10, V8-V5 At least one condition of the conditions such as ＞ 5, V6-V7 >=10, V6-V7 ＞ 5 and V6-V5 >=0.

It is the first lens L1, the second lens L2, the 3rd lens L3, the 4th lens L4, the 5th saturating in addition, in an embodiment Mirror L5, the 6th lens L6, the 7th lens L7 and the 8th lens L8 and the 9th lens L9 can be used all as made by glass material Glass lens；In another embodiment, the second lens L2, the 3rd lens L3, the 4th lens L4, the 5th lens L5 and the 9th lens L9 In at least one can be as the plastic lens made by plastic material.Wherein, the material of plastic lens can be included, but not limited In, polycarbonate (polycarbonate), cyclic olefine copolymer (such as APEL), and polyester resin (such as OKP4 or OKP4HT) etc., or be to include at least one mixing and/or the combination materials of foregoing three.

In an embodiment, the first lens L1, the second lens L2, the 3rd lens L3, the 4th lens L4, the 5th lens L5, 6th lens L6, the 7th lens L7, the 8th lens L8 and the 9th lens L9 can be respectively a spherical lens, a free-form surface lens Or a non-spherical lens.For example, the first lens L1, the second lens L2, the 4th lens L4, the 5th lens L5, the 6th lens L6, the 7th lens L7, the 8th lens L8 and the 9th lens L9 are spherical lens, and the 3rd lens L3 is non-spherical lens or freedom Toroidal lens；Or, the first lens L1, the second lens L2, the 4th lens L4, the 5th lens L5, the 6th lens L6, the 7th lens L7 and the 8th lens L8 is spherical lens, and the 3rd lens L3 and the 9th lens L9 are respectively that non-spherical lens or free form surface are saturating Mirror.

Specifically, each free-form surface lens have an at least free form surface surface, imply that the thing of free-form surface lens Side surface and/or image side surface are free form surface surfaces；And each non-spherical lens has an at least non-spherical surface, imply that non- The thing side surface and/or image side surface of spherical lens are non-spherical surfaces.And each non-spherical surface can meet following mathematical expression：

Wherein, Z be optical axis OA directions coordinate value, using optical transmission direction as positive direction, A4, A6, A8, A10, A12, A14 and A16 is asphericity coefficient, and K is quadratic surface constant, and C=1/R, R is radius of curvature, and Y is to be orthogonal to optical axis OA directions Coordinate value, using the direction away from optical axis OA as positive direction.In addition, the parameters or coefficient of each non-spherical surface mathematical expression Value can be separate.

As shown in figure 1, optical lens OL1 the first lens L1, the second lens L2 and the 3rd lens L3 thing side surface S1, S3, S5 can all have positive refractive index, and it can be the convex surface protruded towards thing side respectively；Image side surface S2, S4, S6, which can all have, just to bend Light rate, it can be towards the recessed concave surface in thing side respectively.Further, the first lens L1, the second lens L2 and the 3rd lens L3 can The lens with diopter are respectively adopted, convex-concave plastic lens or convex-concave glass lens including but not limited to positive diopter Or convex-concave plastic lens or convex-concave glass lens with negative diopter.For example, the first lens L1 can have just to bend The convex-concave glass lens of luminosity, the second lens L2 and the 3rd lens L3 can be respectively convex-concave plastic lens with negative diopter or Convex-concave glass lens.And thing side surface S1, S3 and image side surface S2, S4 can be all spherical face, or at least one surface is Non-spherical surface or free form surface surface；And thing side surface S5 and image side surface S6 can be respectively non-spherical surface and/or freedom Curved surface.

Secondly, the 4th lens L4, the 6th lens L6, the 8th lens L8 and the 9th lens L9 can be respectively adopted with diopter Lens.Wherein, the 4th lens L4, the 6th lens L6, the 8th lens L8 and the 9th lens L9 thing side surface S7, S11, S15, S17 can all have positive refractive index, and it can be the convex surface protruded towards thing side respectively；S8, S12, S16, S18 can all have on image side surface Negative refractive index, it can be the convex surface protruded towards image side respectively.In other words, the 4th lens L4, the 6th lens L6, the 8th lens L8 and The biconvex lens with positive diopter can be respectively adopted in 9th lens L9, but is not limited.

In another embodiment, the 6th lens L6 and the 8th lens L8 can be also respectively adopted with positive diopter or negative diopter Concave-convex lens or meniscus.For example, the 4th lens L4 and the 9th lens L9 can be the biconvex with positive diopter Glass lens or biconvex plastic lens；6th lens L6 and the 8th lens L8 can be that the double convex glass with positive diopter is saturating respectively Mirror, concavo-convex glass lens or convex-concave glass lens, or concavo-convex glass lens or convex-concave glass lens with negative diopter.This Outside, thing side surface S7, S11, S15, S17 and image side surface S8, S12, S16, S18 can be all spherical face, or at least one Surface is non-spherical surface or free form surface surface.

Furthermore, the 5th lens L5 thing side surface S9 can have negative refractive index, its can be towards the recessed concave surface in image side or The convex surface of protrusion；Image side surface S10 can have negative refractive index, and it can be the convex surface or recessed concave surface protruded towards image side.Enter One step, the 5th lens L5, which can be used, has positive diopter or the lens with negative diopter, including but not limited to concavo-convex or double Convex plastic lens or concavo-convex or double convex glass lens, and thing side surface S9 and image side surface S10 can be respectively spherical face, aspheric Face surface or free form surface surface.

In addition, the 7th lens L7 thing side surface S13 can have negative refractive index, it can be towards the recessed concave surface in image side； Image side surface S14 can have positive refractive index, and it can be towards the recessed concave surface in thing side.In another embodiment, the 7th lens L7 Can use has negative diopter or the lens with positive diopter, the including but not limited to biconcave lens with negative diopter, or Person has the meniscus or concave-convex lens of negative diopter or positive diopter, wherein the 7th lens L7 can be glass lens or modeling Glue lens.And thing side surface S13 and image side surface S14 can be respectively spherical face, non-spherical surface or free form surface surface, but It is not limited.

For example, the 6th lens L6, the 7th lens L7 and the 8th lens L8 composition compound lenses, and the 6th lens L6 Image side surface S12, the 7th lens L7 thing side surface S13 and image side surface S14 and the 8th lens L8 thing side surface S15 are mutual Matching.In other words, if image side surface S12, S14 is recessed towards thing side, thing side surface S13, S15 protrudes towards thing side；If image side table Face S12, S14 protrude towards image side, then thing side surface S13, S15 are recessed towards image side.

Furthermore, optical lens OL1, OL2 can more include a diaphragm St and/or screening glass C.In addition, may be used also on imaging surface I One image acquisition unit (not illustrating) is set, and it can carry out opto-electronic conversion to the light beam for penetrating optical lens OL1, OL2.Wherein, Diaphragm St may be disposed between wantonly two lens L1~L9 in optical lens OL1, OL2, the first lens L1 thing side, or the 9th saturating Between mirror L9 and imaging surface I, for example, it is arranged between the 4th lens L4 and the 5th lens L5, but be not limited；Screening glass C It may be disposed between the 9th lens L9 and imaging surface I.

On the other hand, optical lens OL1, OL2 more may include an optical filter F, optical filter F may be disposed at the 9th lens L9 with Between screening glass C.Furthermore, in another embodiment, screening glass C can be provided simultaneously with protection image acquisition unit and filter out infrared light The function of beam, and optical filter F can be omitted.

Fig. 3 A list the present invention Fig. 1 optical lens OL1 each lens parameter, it include each lens radius of curvature, Thickness, refractive index, Abbe number (abbe number), optic diameter and conic constants (conic constant) etc..Wherein eyeglass Surface code name is from the sequentially layout of thing side to image side, for example：" St " represents the thing side table that diaphragm St, " S1 " represent the first lens L1 Face S1, image side surface S2 ... " S19 " and " S20 " that " S2 " represents the first lens L1 represents optical filter F thing side surface S19 respectively And image side surface S20, " S21 " and " S22 " represents screening glass C thing side surface S21 and image side surface S22 etc. respectively.Separately Outside, " thickness " represents the surface and the distance adjacent to the surface of image side one, for example, thing side surface S1 " thickness " is the first lens The distance between L1 thing side surface S1 and the first lens L1 image side surface S2；Image side surface S2 " thickness " is the first lens The distance between L1 image side surface S2 and the second lens L2 thing side surface S3.

Fig. 3 B list Fig. 1 of present invention optical lens OL1 aspherical mathematical expression coefficient.If the of optical lens OL1 Three lens L3 thing side surface S5 and image side surface S6 is non-spherical surface, then each term coefficient of each aspherical mathematical expression such as Fig. 3 B It is shown.

Fig. 4 A illustrate the optical lens OL1 of one embodiment of the invention distortion (distortion) curve map.Wherein, light The aberration rate of beam is controlled in good scope.

Fig. 4 B illustrate the optical lens OL1 of one embodiment of the invention curvature of field (field curvature) curve map, bent Line T, S show optical lens OL1 for tangent light beam (Tangential Rays) and sagittal beam (Sagittal respectively Rays chromatic aberation).Wherein, the tangent curvature of field value of light beam is controlled in good scope with Sagittal field curvature value.

Fig. 5 illustrates the optical lens OL1 of one embodiment of the invention periphery brightness curve figure.As shown in figure 5, by light Camera lens OL1 the 9th lens L9 positive diopter biconvex lens is learned, optics main beam angle (CRA) can be effectively reduced, and then Effective improving optical camera lens OL1 periphery brightness.

Again as shown in Fig. 2 optical lens OL2 is substantially similar with optical lens OL1, and each element is approximately along with identical Symbol.Wherein, optical lens OL2 and optical lens OL1 Main Differences are：Optical lens OL2 the 6th lens L6 and Seven lens L7 constitute a compound lens, and there is a distance between the 7th lens L7 and the 8th lens L8.Wherein, the 6th lens L6 Image side surface S12 and the 7th lens L7 thing side surface S13 match each other.If image side surface S12 is recessed towards thing side, thing side Surface S13 protrudes towards thing side；If image side surface S12 protrudes towards image side, thing side surface S13 is recessed towards image side.

Fig. 6 A list Fig. 2 of present invention optical lens OL2 each lens parameter, and the definition representated by it is with meaning containing substantially It is identical with Fig. 3 A.

Fig. 6 B list Fig. 2 of present invention optical lens OL2 aspherical mathematical expression coefficient.If the of optical lens OL2 Three lens L3 thing side surface S5 and image side surface S6 is non-spherical surface, then each term coefficient of each aspherical mathematical expression such as Fig. 6 B It is shown.

Fig. 7 illustrates the optical lens OL3 of another embodiment of the present invention；Fig. 8 A list Fig. 7 of present invention optical lens OL3 each lens parameter.As shown in fig. 7, optical lens OL3 is substantially similar with optical lens OL1, and each element approximately along with Identical symbol；Definition in Fig. 8 A representated by each lens parameter is with meaning containing substantially identical with Fig. 3 A.

In one embodiment, optical lens OL3 the first lens L1, the 4th lens L4 and the 9th lens L9 can have positive dioptric Degree；Second lens L2 and the 3rd lens L3 can have negative diopter；5th lens L5, the 6th lens L6, the 7th lens L7 and Eight lens L8 can have positive or negative diopter respectively.

In one embodiment, optical lens OL3 the first lens L1, the 6th lens L6, the 7th lens L7, the 8th lens L8 are Glass lens；Second lens L2, the 3rd lens L3, the 4th lens L4, the 5th lens L5 and the 9th lens L9 can be glass respectively Lens or plastic lens.

Fig. 8 B list Fig. 7 of present invention optical lens OL3 aspherical mathematical expression coefficient.In one embodiment, optical frames Head OL3 the 3rd lens L3 and the 9th lens L9 is non-spherical lens, and the 3rd lens L3 and the 9th lens L9 thing side surface Each term coefficient of S5, S17 and image side surface S6, S18 aspherical mathematical expression is as shown in Figure 8 B；In addition, the first lens L1, second Lens L2, the 4th lens L4, the 5th lens L5, the 6th lens L6, the 7th lens L7 and the 8th lens L8 are then spherical lenses.

Fig. 9 lists Fig. 3 A, 3B, 6A, 6B, 8A and 8B optical lens OL1, OL2, OL3 optical data.

Certainly, the present invention can also have other various embodiments, ripe in the case of without departing substantially from spirit of the invention and its essence Various corresponding changes and deformation, but these corresponding changes and change ought can be made according to the present invention by knowing those skilled in the art Shape should all belong to the protection domain of appended claims of the invention.

Claims

1. a kind of optical lens, it is characterised in that including：

One first lens group, at least includes from thing side to image side：

One has the first lens of diopter；

One has the second lens of negative diopter；

One has the 3rd lens of negative diopter；And

One has the 4th lens of positive diopter；And

One has the second lens group of positive diopter, including multiple lens, wherein the lens near image side have positive diopter.

2. optical lens as claimed in claim 1, it is characterised in that second lens group is sequentially at least wrapped from thing side to image side Include one the 5th lens, one the 6th lens, one the 7th lens, one the 8th lens and one the 9th lens with diopter；6th Lens, the 7th lens and the 8th lens constitute a compound lens, or the 6th lens constitute this with the 7th lens and answered Lens are closed, or the 7th lens constitute the compound lens with the 8th lens.

3. a kind of optical lens, it is characterised in that including：

One first lens group, at least includes from thing side to image side：

One has the first lens of diopter；

One has the second lens of negative diopter；

One has the 3rd lens of negative diopter；And

One has the 4th lens of positive diopter；And

One second lens group, a compound lens and the lens with positive diopter are at least included from thing side to image side.

4. optical lens as claimed in claim 3, it is characterised in that second lens group is sequentially at least wrapped from thing side to image side Include one the 5th lens, one the 6th lens, one the 7th lens, one the 8th lens and one the 9th lens with diopter；6th Lens, the 7th lens and the 8th lens constitute the compound lens, or the 6th lens constitute this with the 7th lens and answered Lens are closed, or the 7th lens constitute the compound lens with the 8th lens.

5. optical lens as claimed in claim 1 or 2, it is characterised in that further include an a total focal length F and image height Y, and d is The distance between 4th lens and second lens group, lens near image side of second lens group have one effective Outer diameter D；The optical lens meets at least one condition of following condition：0.15≤d/F, d/F≤0.85,0.6≤D/Y and D/Y ≤2.2。

6. a kind of optical lens, it is characterised in that from thing side to image side, including：

One has the first lens of diopter；

One has the second lens of negative diopter；

One has the 3rd lens of negative diopter；

One has the 4th lens of positive diopter；

One has the 5th lens of diopter；

One has the 6th lens of diopter；

One has the 7th lens of diopter；

One has the 8th lens of diopter；And

One has the 9th lens of positive diopter；

Wherein, the 6th lens, the 7th lens and the 8th lens constitute a compound lens, or the 6th lens with this Seven lens constitute the compound lens, or the 7th lens constitute the compound lens with the 8th lens.

7. the optical lens as described in claim 2,4 or 6, it is characterised in that the 6th lens, the 7th lens and the 8th Any one in lens has negative diopter, and another two then have positive diopter；First lens, the 5th lens and this Nine lens have positive diopter, and the compound lens has negative diopter.

8. the optical lens as described in claim 1,3 or 6, it is characterised in that the lens near image side are a biconvex lens.

9. the optical lens as described in claim 1,3 or 6, it is characterised in that further include a total focal length F, an overall length TTL, one Image height Y, a visual angle FOV and an aperture FNO；The optical lens meets at least one condition of following condition：0≤F/TTL、F/ TTL≤0.25,0.8≤F/Y and F/Y≤1.2,70 °≤FOV, FOV≤115 °, 0≤(FNO × TTL)/(FOV × Y) and (FNO ×TTL)/(FOV×Y)≤0.4；Wherein, the overall length is the thing side surface of first lens to the distance of an imaging surface.

10. the optical lens as described in claim 2,4 or 6, it is characterised in that the thing side surface of first lens has one the One radius of curvature R 1, the image side surface of first lens have the image side surface tool of a second curvature radius R2, second lens There are one the 4th radius of curvature R 4 and an optics effective diameter Φ 4, the 4th lens that there are Abbe number V4 and the 9th lens to have Ah Shellfish number V9；The optical lens meets at least one condition of following condition：0.8≤│R2/R1│、│R2/R1│≤2、1.6≤Φ4/ R4, Φ 4/R4≤2,35≤V4, V4≤60,50≤V9 and V9≤85.

11. the optical lens as described in claim 2,4 or 6, it is characterised in that first lens have Abbe number V1 and refraction Rate N1, second lens have Abbe number V2 and refractive index N2, and the 3rd lens have Abbe number V3 and refractive index N3, the 4th Lens have Abbe number V4 and refractive index N4, and the 5th lens have Abbe number V5 and refractive index N5, and the 6th lens have Ah Shellfish number V6 and refractive index N6, the 7th lens have Abbe number V7 and refractive index N7, and the 8th lens have Abbe number V8 and folding Rate N8 is penetrated, the 9th lens have Abbe number V9 and refractive index N9, and the optical lens meets at least one of following condition Part：N1-N3 >=0.1, N1-N3 ＞ 0, N2-N3 >=0.1, N2-N3 ＞ 0, N4-N3 ＞ 0, N7-N8 ＞ 0, N7-N6 ＞ 0, N7-N5 >= 0th, N5-N6 >=0, N9-N8 ＞ 0, V2-V1 ＞ 0, V3-V1 ＞ 5, V3-V4 ＞ 5, V8-V9 ＞ 5, V8-V7 ＞ 5, V8-V6 ＞ 5, V8- V5 ＞ 5, V6-V7 ＞ 5 and V6-V5 >=10.

12. the optical lens as described in claim 2,4 or 6, it is characterised in that first lens be a meniscus, this Two lens are that a meniscus, the 3rd lens are a meniscus and/or a non-spherical lens, the 4th lens are a biconvexs Lens, the 5th lens be that one is concavo-convex or biconvex lens, the 6th lens be a biconvex lens or meniscus or concave-convex lens, 7th lens be a biconcave lens or meniscus or concave-convex lens, the 8th lens be a biconvex lens or meniscus or Concave-convex lens, or the 9th lens are a biconvex lens/or a non-spherical lens.