CN106324797B - Optical lens - Google Patents
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- CN106324797B CN106324797B CN201510366938.XA CN201510366938A CN106324797B CN 106324797 B CN106324797 B CN 106324797B CN 201510366938 A CN201510366938 A CN 201510366938A CN 106324797 B CN106324797 B CN 106324797B
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Abstract
The present invention proposes a kind of optical lens, sequentially includes from object side to image side: one first lens, one second lens, a third lens, one the 4th lens, one the 5th lens, one the 6th lens and one the 7th lens.First lens have negative diopter, and the second lens have diopter, and the third lens have diopter, and the 4th lens have positive diopter, and the 5th lens, the 6th lens and the 7th lens have diopter.Any one of second lens and the third lens are with positive diopter, and another one has negative diopter；Any one of 5th lens and the 6th lens are with positive diopter, and another one has negative diopter.The object side surface of first lens has bent light rate R2, and │≤0.01 │ R2/R1 with bent light rate R1, image side surface.
Description
Technical field
The present invention proposes a kind of optical lens, and in particular to a kind of optical frames small in size and good image quality
Head.
Background technique
In recent years, since smartphone and the technology of hand-held tablet computer are maked rapid progress, various running gears pair
It is promoted in the optical image quality requirement of its photographic device；And because of the lightening design of running gear, the optics of photographic device
The thickness of camera lens is also required to thinning therewith.Optical lens is usually to be made of several pieces eyeglasses, excellent in order to increase competition in the market
Gesture, micromation, high image quality and to reduce cost be always the target to be pursued of product development.
Therefore, it needs to propose a kind of new optical lens, under the premise of reducing manufacturing cost, while realizing optical lens
Miniaturization and the purpose for promoting image quality.
Summary of the invention
The invention relates to a kind of optical lens.Under the premise of reducing manufacturing cost, while realizing that optical lens is small
Typeization and promotion image quality.
The present invention proposes a kind of optical lens.Optical lens sequentially includes from object side to image side: one first lens, one second
Lens, a third lens, one the 4th lens, one the 5th lens, one the 6th lens and one the 7th lens.First lens have negative bend
Luminosity, the second lens have diopter, and the third lens have diopter, and the 4th lens have positive diopter, the 5th lens, the 6th
Lens and the 7th lens have diopter.Any one of second lens and the third lens are with positive diopter, and another one has
Negative diopter；Any one of 5th lens and the 6th lens are with positive diopter, and another one has negative diopter.
The present invention separately proposes a kind of optical lens.Optical lens sequentially includes from object side to image side: one first lens, one
Two lens, a third lens, one the 4th lens, one the 5th lens, one the 6th lens and one the 7th lens.First lens have negative
Diopter, the second lens have diopter, and the third lens have diopter, and the 4th lens have positive diopter, the 5th lens tool
There is diopter, the 6th lens have diopter, and the 7th lens have diopter.The object side surface of first lens has bent light rate
R1, the image side surface of the first lens have bent light rate R2, and │≤0.01 │ R2/R1.
The present invention compared with the existing technology the beneficial effect is that, optical lens of the invention can not only reduce manufacture at
This, is more able to achieve the quality that optical lens minimizes and improves imaging.
More preferably understand to have to above-mentioned and other aspect of the invention, preferred embodiment is cited below particularly, and cooperates institute
Accompanying drawings are described in detail below.
Detailed description of the invention
Fig. 1 is painted the optical lens of one embodiment of the invention；
Fig. 2A is painted the curvature of field (field curvature) curve graph of the optical lens of Fig. 1；
Fig. 2 B is painted distortion (distortion) curve graph of the optical lens of Fig. 1；
Fig. 3 is painted the optical lens of another embodiment of the present invention；
Fig. 4 is painted the optical lens of another embodiment of the present invention.
Specific embodiment
It will be described various embodiments of the present invention below, and cooperate schema as illustration.Other than these detailed descriptions, this
Invention can also widely be implemented in other examples, and the substitution easily of any embodiment, modification, equivalence changes are all
In the range of this case, and it is subject to the scope of the patents later.In the description of specification, in order to make reader to the present invention
There is more complete understanding, provides many specific details；However, the present invention may be in clipped or these whole specific details
Under the premise of, it is still implementable.Moreover, it is well known that the step of or element be not described in details, to avoid the present invention is caused
Unnecessary limitation.Same or similar element will be indicated in schema with same or like symbol.It is specifically intended that schema
Only signal is used, not the actual size of representation element or quantity, unless otherwise specified.
Fig. 1 is painted the optical lens OL1 of one embodiment of the invention.For the feature for showing the present embodiment, only show and this
The related structure of embodiment, remaining structure are omitted.The optical lens OL1 of the present embodiment, can be a wide-angle lens, can
To be but not limited to certain focus wide-angle lens.Optical lens OL1 can be applied to a device with image projecting or acquisition function
On, device is including but not limited to being hand hand computer system, hand communication system, automobile-used pick-up lens, monitoring system, number
Code camera, digital code camera or projector.
In the present embodiment, optical lens OL1 may include one first lens group and one second lens group.Wherein, the first lens
Group includes one or more than one lens, and its entirety is in positive diopter；Second lens group includes one or more than one lens,
And its entirety is in negative diopter.
As shown in Figure 1, optical lens OL1 from object side (object side) to image side (image-forming side) according to
Sequence mainly includes: the first lens L1, the second lens L2, the third lens L3, the 4th lens L4, the 5th lens L5, the 6th lens L6
And the 7th lens L7.Wherein, the first lens L1, the second lens L2 and the third lens L3 can be under the jurisdiction of the first lens group, and the 4th
Lens L4, the 5th lens L5, the 6th lens L6 and the 7th lens L7 can be under the jurisdiction of the second lens group；In addition, the first lens L1,
Two lens L2, the third lens L3, the 4th lens L4, the 5th lens L5, the 6th lens L6 and the 7th lens L7 can be arranged in a light
On axis OA.
In an embodiment, on optical axis OA, the first lens L1 can have diopter, e.g. negative diopter；Second thoroughly
Mirror L2 and the third lens L3 can be respectively provided with diopter, such as be positive diopter or negative diopter respectively；4th lens L4 can have
There are diopter, e.g. positive diopter；5th lens L5 and the 6th lens L6 can be respectively provided with diopter, such as be just in the wrong respectively
Luminosity or negative diopter；7th lens L7 can have diopter, e.g. negative diopter.
In addition, the diopter of the second lens L2 and the third lens L3 can be collocated with each other and set in an embodiment.Citing
For, the one of them of the second lens L2 and the third lens L3 is if positive diopter, then another one can be negative diopter.
Furthermore in another embodiment, the diopter of the 5th lens L5 and the 6th lens L6 can also be collocated with each other and set.
For example, the one of them of the 5th lens L5 and the 6th lens L6 is if positive diopter, then other one can be negative diopter,
So invention is not limited thereto.
In an embodiment, optical lens OL1 can meet the condition of │≤0.01 │ R2/R1.Wherein, R1 is the first lens L1
Object side surface S1 bent light rate, R2 is the bent light rate of the image side surface S2 of the first lens L1.
In an embodiment, optical lens OL1 can meet 0.25≤F/TTL, F/TTL≤0.45 and/or 0.25≤F/TTL
≤ 0.45 condition.Wherein, F is the whole focal length of optical lens OL1；TTL can define be the first lens L1 object side surface S1
Along optical axis OA to the distance of imaging surface I, or may be defined as the first lens L1 object side surface S1 central point to imaging surface I reality
Matter vertical range.
In an embodiment, optical lens OL1 can meet 0.2≤F/Y, F/Y≤0.6 and/or the item of 0.2≤F/Y≤0.6
Part.Wherein, Y is the image height of optical lens OL1.Further, in another embodiment, optical lens OL1 can more meet
0.25≤F/Y, 0.3≤F/Y, F/Y≤0.55 and F/Y≤0.5 etc. at least one.
In an embodiment, optical lens OL1 can meet the condition of (FNO*TTL)/(FOV*Y)≤0.03.Wherein, FOV
It is the field of view angle of optical lens OL1, FNO is the aperture of optical lens OL1.Further, in another embodiment, optics
Camera lens OL1 can more meet 0.01≤(FNO*TTL)/(FOV*Y)≤0.03 condition.
In an embodiment, optical lens OL1 can meet 0.0≤d/F, d/F≤0.1 and/or the item of 0.0≤d/F≤0.1
Part.Wherein, d may be defined as the spacing between the first lens group and the second lens group, or can define from the image side of the third lens L3
Object side surface S7 the distance between of the surface S6 along optical axis OA to the 4th lens L4.Further, in another embodiment, light
The condition of 0.0≤d/F≤0.08,0.05≤d/F≤0.1 or 0.05≤d/F≤0.08 can more be met by learning camera lens OL1.
In addition, in an embodiment, at least one of the first lens L1, the second lens L2 and the third lens L3 can be used by
A glass lens made by glass material；In another embodiment, the second lens L2, the third lens L3, the 4th lens L4,
A plastic lens as made by plastic material can be used at least one of five lens L5, the 6th lens L6 and the 7th lens L7.
For example, the first lens L1 can be used glass lens, and the one the second lens L2, the third lens L3, four are thoroughly
Plastic lens can be used at least one of mirror L4, the 5th lens L5, the 6th lens L6 and the 7th lens L7；Alternatively, the 4th lens
Plastic lens can be used in L4, the 5th lens L5, the 6th lens L6 and the 7th lens L7, without to limit the present invention.Wherein,
The material of plastic lens may include, but be not limited to, polycarbonate (polycarbonate), cyclic olefine copolymer (such as
It APEL) and polyester resin (such as OKP4 or OKP4HT) etc., or is the mixing material of at least one for including aforementioned three.
In an embodiment, the first lens L1, the second lens L2, the third lens L3, the 4th lens L4, the 5th lens L5,
6th lens L6 and the 7th lens L7 may respectively be spherical lens, non-spherical lens and/or free-form surface lens.
Specifically, each free-form surface lens have an at least free form surface surface, the object of free-form surface lens is implied that
Side surface and/or image side surface are free form surface surfaces；And each non-spherical lens has an at least non-spherical surface, implies that non-
The object 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 the direction optical axis OA 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 are radius of curvature, and Y is to be orthogonal to the direction optical axis OA
Coordinate value, using the direction far from optical axis OA as positive direction.In addition, the parameters or coefficient of each non-spherical surface mathematical expression
Value can be set separately, to determine the focal length of each position point of non-spherical surface.
In another embodiment, the first lens L1 can be spherical lens, and the second lens L2, the third lens L3, the 4th are thoroughly
At least one of mirror L4, the 5th lens L5, the 6th lens L6 and the 7th lens L7 may respectively be non-spherical lens or free form surface
Lens.
In another embodiment, the first lens L1 can be spherical lens, and the second lens L2 and/or the third lens L3 can also be
Spherical lens, and at least one of the 4th lens L4, the 5th lens L5, the 6th lens L6 and the 7th lens L7 may respectively be aspheric
Face lens or free-form surface lens.
In another embodiment, the first lens L1 can be spherical lens, and the second lens L2, the third lens L3, the 4th are thoroughly
Mirror L4, the 5th lens L5, the 6th lens L6 and the 7th lens L7 are non-spherical lens.For example, the first lens L1 can be
Object side surface S1 and image side surface S2 is all the spherical lens of spherical face, and the second lens L2, the third lens L3, the 4th lens
L4, the 5th lens L5, the 6th lens L6 and the 7th lens L7 can be all the non-of non-spherical surface for object side surface and image side surface
Spherical lens.Further, the surface that refractive index is essentially maximum, example can also be used in the object side surface S1 of the first lens L1
As refractive index levels off to infinity.In other words, the object side surface S1 of the first lens L1 can be essentially plane.
In addition, in an embodiment, the object side surface S1 of the first lens L1 can level off to plane or be essentially plane,
Can have at optical axis OA positive refractive index, negative refractive index or be essentially maximum refractive index；Image side surface S2 can be court
The concave surface recessed to object side has positive refractive index at optical axis OA.Further, the first lens L1 can be used with negative dioptric
The lens of degree, including but not limited to meniscus, biconcave lens or the plano-concave lens of negative diopter, e.g. convex-concave glass
Lens, concave-concave glass lens or plano-concave glass lens, and image side surface S2 can be spherical face.
Object side surface S3, S5 of second lens L2 and the third lens L3 can be the convex surface protruded towards object side, in optical axis
There is positive refractive index at OA；Image side surface S4, S6 can be respectively towards the recessed concave surface in object side or towards image side protrude convex surface,
There can be refractive index at optical axis OA, such as with positive refractive index or negative refractive index.Further, the second lens L2 and the third lens
The lens with diopter, the lens of e.g. negative diopter or the lens of positive diopter can be respectively adopted in L3, including but unlimited
In the meniscus with negative diopter or with the biconvex lens of positive diopter, e.g. convex-concave plastic lens, double convex glass
Lens, convex-concave glass lens or biconvex plastic lens, and object side surface S3, S5 and image side surface S4, S6 may respectively be spherical surface table
Face or non-spherical surface.
The object side surface S7 of 4th lens L4 can be the convex surface protruded towards object side, have positive dioptric at optical axis OA
Rate；Image side surface S8 can be the convex surface protruded towards image side, have negative refractive index at optical axis OA.Further, the 4th thoroughly
The lens with positive diopter can be used in mirror L4, including but not limited to the biconvex lens of positive diopter, e.g. biconvex modeling
Expect lens or double convex glass lens, and object side surface S7 and image side surface S8 may respectively be spherical face or non-spherical surface.
The object side surface S9 of 5th lens L5 can be towards the recessed concave surface in image side or towards object side protrude convex surface,
There is refractive index, e.g. negative refractive index or positive refractive index at optical axis OA；Image side surface S10 can be the concave surface recessed towards object side
Or the convex surface protruded towards image side, there is refractive index, e.g. positive refractive index or negative refractive index at optical axis OA.Further
The lens of lens or positive diopter with negative diopter can be used in ground, the 5th lens L5, including but not limited to have negative dioptric
The biconcave lens of degree or the biconvex lens of positive diopter, e.g. concave-concave plastic lens, biconvex plastic lens, concave-concave glass lens
Or double convex glass lens, and object side surface S9 and image side surface S10 may respectively be spherical face or non-spherical surface.
The object side surface S11 of 6th lens L6 can be the convex surface protruded towards object side, have positive dioptric at optical axis OA
Rate；Image side surface S12 can be the convex surface or the concave surface recessed towards object side protruded towards image side, have dioptric at optical axis OA
Rate, e.g. negative refractive index or positive refractive index.Further, the lens or negative in the wrong with positive diopter can be used in the 6th lens L6
The lens of luminosity, the including but not limited to meniscus of the biconvex lens with positive diopter or negative diopter, it is e.g. double
Convex plastic lens, convex-concave plastic lens, double convex glass lens or convex-concave glass lens, and object side surface S11 and image side surface S12
It may respectively be spherical face or non-spherical surface.
The object side surface S13 of 7th lens L7 can be towards the recessed concave surface in image side or the convex surface protruded towards object side,
There can be negative refractive index at optical axis OA；Image side surface S14 can be substantially in the convex-shaped protruded towards image side, and close to optical axis
It is the concave surface recessed towards object side at OA, there is positive refractive index at optical axis OA.Further, tool can be used in the 7th lens L7
There are the lens of negative diopter, the including but not limited to meniscus of the biconcave lens with negative diopter or negative diopter, example
Concave-concave plastic lens, convex-concave plastic lens, concave-concave glass lens or convex-concave glass lens in this way, and object side surface S13 and image side
Surface S14 may respectively be spherical face or non-spherical surface.
In one embodiment, the first lens L1, the 4th lens L4, the 5th lens L5, the 6th lens L6 and the 7th lens L7 tool
There is the non-spherical lens of diopter.Further, the first lens L1 can be the plano-concave aspherical glass lens with diopter,
4th lens L4 can be the biconvex aspherical plastic lens with positive diopter, and the 5th lens L5, the 6th lens L6 and
Seven lens L7 can be the aspherical plastic lens with diopter respectively.
In addition, in another embodiment, the 4th lens L4, the 5th lens L5, the 6th lens L6 and the 7th lens L7 are bent
Luminosity can by it is positive and negative it is staggered in a manner of intert setting.
Furthermore in an embodiment, a non-spherical lens, and its image side is can be used in the 7th lens L7 of optical lens OL1
It includes at least non-spherical surface of a point of inflexion IF that surface S14, which is one,.Wherein, the distance value of point of inflexion IF to optical axis OA are h14,
And the radius of the 7th lens L7 is H14, and optical lens OL1 can meet 0.5≤│ h14/H14 │, │≤0.8 │ h14/H14 and/or
The condition of │≤0.8 0.5≤│ h14/H14.Further, in another embodiment, optical lens OL1 can more meet 0.6≤│
H14/H14 │, │≤0.8 0.6≤│ h14/H14, │≤0.7 │ h14/H14, │≤0.7 0.5≤│ h14/H14 and/or 0.6≤│
The condition of │≤0.7 h14/H14.
Specifically, h14 can be the shortest distance or vertical range of the point of inflexion IF to optical axis OA of the 7th lens L7.This
Outside, point of inflexion IF can be located on the image side surface S14 of the 7th lens L7 by neighbouring optical axis OA at lens periphery；And H14 can
To be the effective aperture of the 7th lens L7 or distance of the outer diameter to optical axis OA of optics effective aperture or the 7th lens L7, example
The shortest distance or vertical range in this way.
In addition, optical lens OL1 can also meet the condition of │≤0.4 │ δ 7/D7 in embodiment.Wherein, δ 7 is the 7th saturating
The intersection point of the image side surface S14 and optical axis OA of mirror L7 are projected to a development length of the position of optical axis OA to point of inflexion IF；And D7
It can be thickness of the 7th lens L7 on optical axis OA, or the thickness of the central point for the 7th lens L7.Further, in another
In embodiment, optical lens OL1 can more meet │≤0.4 0.0≤│ δ 7/D7, │≤0.4 δ 7/D7 0.1≤│ or 0.2≤│ δ 7/D7 │
≤ 0.4 condition.
Specifically, if the image side surface S14 of the 7th lens L7 is aspherical, the image side surface S14 of the 7th lens L7
It can be the side that the first direction towards imaging surface I extends, contrary flexure court deviates from imaging surface I again from outer diameter to the variation of the surface of central point
To extension.If it is that the image side surface S14 of the 7th lens L7 most connects that point of inflexion IF of the 7th lens L7, which can substantially be said, with for this
The position of nearly imaging surface I.
Furthermore as shown in Figure 1, optical lens OL1 further includes diaphragm St and/or screening glass C.In addition, in being gone back on imaging surface I
A settable image acquisition unit (not being painted) can carry out photoelectric conversion to the light beam for penetrating optical lens OL1.Wherein, light
Late St may be disposed between wantonly two lens L1~L7 in optical lens OL1, the object side of the first lens L1 or the 7th lens L7 with
It between imaging surface I, such as is set between the image side of the third lens L3 and the object side of the 4th lens L4, but not limited to this；It protects
Bluff piece C may be disposed between the 7th lens L7 and imaging surface I.
On the other hand, a filter coating can be also formed on the object side surface S15 of screening glass C and/or image side surface S16 (not draw
Show), infrared light beam can be filtered out.In addition, optical lens OL1 more may include optical filter (not being painted), the 7th may be disposed at
Between lens L7 and screening glass C.Furthermore in another embodiment, protects image acquisition unit and filter out the function of infrared beam
It can be integrated in screening glass C simultaneously.
Table one lists the particulars of an embodiment of optical lens OL1, it includes the radius of curvature of each lens, thickness,
Refractive index and abbe number etc..Wherein the surface code name of eyeglass represents each interface, such as: St represents the position diaphragm St, S1 is represented
For first lens L1 towards the object side surface S1 of object side, S2 represents the first lens L1 towards the image side surface S2 ... etc. of image side.In addition, thick
Degree represent the surface at a distance from the surface adjacent to image side, for example, image side surface S1 with a thickness of image side surface S1 and picture
The distance between side surface S2.
Table one
In addition, if the second lens L2 and the 4th lens L4, the 5th lens L5, the 6th lens L6 and the 7th lens in table one
Each surface of L7 is non-spherical surface, then each term coefficient in aspherical mathematical expression can be as shown in Table 2.
Table two
| S3 | S4 | S7 | S8 | S9 | |
| K | -2.0381E+01 | -6.7805E-01 | -5.2422E+00 | 1.4787E+00 | 6.9541E+00 |
| A4 | -1.1974E-02 | 4.0700E-04 | 1.0352E-02 | 5.6866E-02 | -6.8508E-02 |
| A6 | -1.2076E-03 | 2.7699E-03 | -5.8590E-02 | -9.3829E-02 | -2.6431E-02 |
| A8 | 5.0840E-04 | 7.7018E-04 | 1.2055E-01 | 4.4791E-02 | 3.5627E-02 |
| A10 | 3.0146E-05 | 1.2351E-04 | -9.1808E-02 | 5.2620E-02 | -2.0676E-03 |
| A12 | -7.8386E-06 | -3.7435E-04 | -4.1860E-01 | -1.3440E-01 | -2.4837E-02 |
| A14 | -7.3220E-07 | 3.0025E-04 | 4.5152E-01 | 6.7459E-02 | 2.0967E-02 |
| A16 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S10 | S11 | S12 | S13 | S14 | |
| K | -9.0878E+00 | 9.1039E+00 | -5.4778E+00 | 2.8140E+00 | -6.6953E-01 |
| A4 | -4.7546E-03 | 1.6814E-02 | -6.2190E-02 | -7.5311E-02 | -1.6900E-01 |
| A6 | 1.8413E-02 | -3.7451E-03 | 3.2815E-02 | -7.0486E-02 | 6.3491E-02 |
| A8 | -1.1565E-02 | 2.0168E-03 | 1.5900E-03 | 1.4699E-01 | -1.7815E-02 |
| A10 | 4.8441E-03 | -2.2819E-03 | -2.4743E-03 | -1.1392E-01 | 2.9086E-03 |
| A12 | 4.8895E-04 | 3.9393E-04 | 5.4922E-04 | 4.7981E-02 | -2.4265E-04 |
| A14 | -5.7720E-04 | 3.4687E-04 | 2.1348E-04 | -1.0924E-02 | 3.2774E-06 |
| A16 | 0.0000E+00 | -1.5360E-04 | -8.7840E-05 | 1.0469E-03 | 6.3107E-07 |
Fig. 2A is painted the curvature of field (field curvature) curve of the optical lens OL1 of an embodiment according to the present invention
Figure.Wherein, curve T, S shows optical lens OL1 for tangent light beam (Tangential Rays) and sagittal beam respectively
The chromatic aberation of (Sagittal Rays).The tangent curvature of field value of display beams and Sagittal field curvature value are controlled in good model in figure
In enclosing.
Fig. 2 B is painted distortion (distortion) curve graph of the optical lens OL1 of an embodiment according to the present invention.Figure
The aberration rate of middle display beams controls in good range.
Fig. 3 is painted optical lens OL2 according to another embodiment of the present invention.The optical lens OL2 of the present embodiment is substantially
It is similar with optical lens OL1, it is in place of main difference, the second lens L2, the third lens L3, the 5th lens L5, the 6th lens
Material, appearance or the optical parameter of L6 and the 7th lens L7.
Specifically, as shown in figure 3, the image side surface S4 of the second lens L2 of optical lens OL2 can be it is convex towards image side
Convex surface out can have negative refractive index at optical axis OA.The biconvex lens with positive diopter, example can be used in second lens L2
Double convex glass lens or biconvex plastic lens in this way, and at least one of object side surface S3 and image side surface S4 can be spherical surface table
Face.
The image side surface S6 of the third lens L3 can be recessed towards object side concave surface, can have positive refractive index at optical axis OA.
The meniscus with negative diopter, e.g. convex-concave plastic lens or convex-concave glass lens, and object can be used in the third lens L3
Side surface S3 can be non-spherical surface.
The convex surface that the object side surface S9 of 5th lens L5 can be protruded towards object side, can have positive refractive index at optical axis OA；
The convex surface that image side surface S10 can be protruded towards image side, can have negative refractive index at optical axis OA.5th lens L5, which can be used, to be had
The biconvex lens of positive diopter, e.g. biconvex plastic lens or double convex glass lens, and object side surface S9 and image side surface S10
At least one can be non-spherical surface.
The image side surface S12 of 6th lens L6 can be recessed towards object side concave surface, can have positive refractive index at optical axis OA.
The meniscus with negative diopter, e.g. convex-concave plastic lens or convex-concave glass lens, and object can be used in 6th lens L6
Side surface S3 can be non-spherical surface.
The convex surface that the object side surface S13 of 7th lens L7 can be protruded towards object side, can have negative refractive index at optical axis OA.
The meniscus with negative diopter, e.g. convex-concave plastic lens or convex-concave glass lens, and object can be used in 7th lens L7
Side surface S13 can be non-spherical surface.
Table three lists the particulars of an embodiment of optical lens OL2, it includes the radius of curvature of each lens, thickness,
Refractive index, abbe number etc..
Table three
In addition, if the third lens L3 in table three to each surface of the 7th lens L7 be non-spherical surface, aspherical number
Each term coefficient in formula can be as shown in Table 4.
Table four
| S5 | S6 | S7 | S8 | S9 | |
| K | 5.3957E+00 | -3.4529E+00 | 1.8454E+00 | 1.4110E+01 | -2.3345E+01 |
| A4 | -8.7272E-02 | -4.0097E-02 | 2.3026E-02 | -1.6611E-01 | -1.5251E-01 |
| A6 | -3.7529E-03 | -7.0239E-02 | -5.0004E-02 | 1.8825E-01 | 1.0004E-01 |
| A8 | 1.6655E-02 | 8.3803E-02 | 1.0248E-02 | -1.5807E-01 | -9.2584E-02 |
| A10 | -3.5032E-04 | 4.7280E-02 | -5.5580E-03 | 4.6607E-02 | 3.9566E-02 |
| A12 | -2.8231E-03 | -1.0646E-01 | 3.1541E-02 | 1.8515E-02 | -6.4824E-03 |
| A14 | -1.3632E-03 | -2.3831E-02 | -1.5097E-02 | -6.0737E-03 | 1.6355E-03 |
| A16 | 1.2893E-03 | 7.9736E-02 | -5.1793E-03 | -2.7032E-03 | -1.4750E-06 |
| S10 | S11 | S12 | S13 | S14 | |
| K | 3.5895E+00 | 8.5912E+00 | -3.2957E-01 | -2.2629E-01 | -6.1878E+00 |
| A4 | 4.4216E-02 | 7.3722E-02 | 8.0543E-03 | -4.0345E-02 | -2.2305E-02 |
| A6 | -6.4071E-02 | -8.4884E-02 | -3.0077E-02 | 6.6159E-03 | 3.2816E-03 |
| A8 | 1.2276E-02 | 2.1237E-02 | 9.8181E-03 | -6.0018E-04 | -3.2983E-04 |
| A10 | 6.0574E-03 | 7.5277E-04 | -8.7080E-04 | 2.9916E-05 | 1.6175E-05 |
| A12 | -3.0587E-03 | -2.0947E-03 | -1.7341E-04 | -5.6897E-07 | 5.9075E-08 |
| A14 | -7.7033E-04 | 3.0595E-04 | 3.4393E-05 | -1.5104E-08 | -2.8350E-08 |
| A16 | 7.9097E-04 | 5.6422E-05 | -7.4106E-07 | 0.0000E+00 | 0.0000E+00 |
Fig. 4 is painted optical lens OL3 according to still another embodiment of the invention.The optical lens OL3 of the present embodiment is substantially
It is similar with optical lens OL1, the appearance or optical parameter of each lens are in place of main difference.
Table five lists the particulars of an embodiment of optical lens OL3, it includes the radius of curvature of each lens, thickness,
Refractive index, abbe number etc..
Table five
In addition, if the second lens L2 and the 4th lens L4 in table four to each surface of the 7th lens L7 be aspherical table
Face, then each term coefficient in aspherical mathematical expression can be as shown in Table 6.
Table six
| S3 | S4 | S7 | S8 | S9 | |
| K | -1.1675E+01 | -3.2976E-01 | -2.9903E+00 | 1.5910E+00 | 6.5967E+00 |
| A4 | -8.7272E-02 | -4.0097E-02 | 2.3026E-02 | -1.6611E-01 | -1.5251E-01 |
| A6 | -3.7529E-03 | -7.0239E-02 | -5.0004E-02 | 1.8825E-01 | 1.0004E-01 |
| A8 | 1.6655E-02 | 8.3803E-02 | 1.0248E-02 | -1.5807E-01 | -9.2584E-02 |
| A10 | -3.5032E-04 | 4.7280E-02 | -5.5580E-03 | 4.6607E-02 | 3.9566E-02 |
| A12 | -2.8231E-03 | -1.0646E-01 | 3.1541E-02 | 1.8515E-02 | -6.4824E-03 |
| A14 | -1.3632E-03 | -2.3831E-02 | -1.5097E-02 | -6.0737E-03 | 1.6355E-03 |
| A16 | 1.2893E-03 | 7.9736E-02 | -5.1793E-03 | -2.7032E-03 | -1.4750E-06 |
| S10 | S11 | S12 | S13 | S14 | |
| K | -9.4936E+00 | 1.1134E+01 | -5.2660E+00 | 8.4829E-01 | -6.7818E-01 |
| A4 | 4.4216E-02 | 7.3722E-02 | 8.0543E-03 | -4.0345E-02 | -2.2305E-02 |
| A6 | -6.4071E-02 | -8.4884E-02 | -3.0077E-02 | 6.6159E-03 | 3.2816E-03 |
| A8 | 1.2276E-02 | 2.1237E-02 | 9.8181E-03 | -6.0018E-04 | -3.2983E-04 |
| A10 | 6.0574E-03 | 7.5277E-04 | -8.7080E-04 | 2.9916E-05 | 1.6175E-05 |
| A12 | -3.0587E-03 | -2.0947E-03 | -1.7341E-04 | -5.6897E-07 | 5.9075E-08 |
| A14 | -7.7033E-04 | 3.0595E-04 | 3.4393E-05 | -1.5104E-08 | -2.8350E-08 |
| A16 | 7.9097E-04 | 5.6422E-05 | -7.4106E-07 | 0.0000E+00 | 0.0000E+00 |
In addition, table seven is listed according to the present invention such as the comparison data of the embodiment of table one to table six.
Table seven
| Optical lens OL1 | Optical lens OL2 | Optical lens OL3 | |
| F | 2.7 | 3.03 | 2.86 |
| Y | 8.05 | 9.11 | 5.86 |
| TTL | 8.05 | 9.11 | 7.56 |
| d | 0.188 | 0.182 | 0.151 |
| F/TTL | 0.33 | 0.39 | 0.37 |
| F/Y | 0.33 | 0.33 | 0.48 |
| d/F | 0.069 | 0.060 | 0.053 |
| R1 | ∞ | ∞ | ∞ |
| R2 | 7.952 | 1.972 | 14.861 |
| R2/R1 | 0.00 | 0.00 | 0.00 |
| h14 | 1.469 | 2.210 | 1.568 |
| H14 | 2.334 | 3.439 | 2.291 |
| │h14/H14│ | 0.63 | 0.64 | 0.68 |
| δ7 | 0.15 | 0.25 | 0.19 |
| D7 | 0.58 | 0.75 | 0.58 |
| │δ7/D7│ | 0.26 | 0.33 | 0.32 |
| FOV | 160 | 160 | 120 |
| FNO | 2.36 | 2.83 | 2.11 |
| (FNO*TTL)/(FOV*Y) | 0.014 | 0.017 | 0.022 |
Although however, it is not to limit the invention in conclusion the present invention has been disclosed as a preferred embodiment.This hair
Related technical personnel in bright technical field, without departing from the spirit and scope of the present invention, when various changes can be made
With retouching.But these change and retouch the protection scope that all should belong to appended claims of the present invention.
Claims (11)
1. a kind of optical lens, which is characterized in that sequentially include from object side to image side: one first lens, one second lens, one
Three lens, one the 4th lens, one the 5th lens, one the 6th lens and one the 7th lens, first lens have negative diopter, should
Second lens have diopter, which has diopter, and the 4th lens have positive diopter, and the 5th lens have
Diopter, the 6th lens have diopter, and the 7th lens have negative diopter, times of second lens and the third lens
One has positive diopter, and another one has negative diopter；Any one of 5th lens and the 6th lens, which have, just bends
Luminosity, and another one has negative diopter；The object side surface of first lens has bent light rate R1, the image side table of first lens
Face has bent light rate R2, and │≤0.01 │ R2/R1.
2. a kind of optical lens, which is characterized in that sequentially include from object side to image side: one first lens, one second lens, one
Three lens, one the 4th lens, one the 5th lens, one the 6th lens and one the 7th lens, first lens have negative diopter, should
Second lens have diopter, which has diopter, and the 4th lens have positive diopter, and the 5th lens have
Diopter, the 6th lens have diopter, and the 7th lens have negative diopter, and the object side surface of first lens has song
Light rate R1, the image side surface of first lens have bent light rate R2, and │≤0.01 │ R2/R1.
3. optical lens as claimed in claim 1 or 2, which is characterized in that further include a whole focal length F, and 0.25≤F/TTL
And/or F/TTL≤0.45, wherein TTL is the object side surface of first lens along an optical axis to the distance of an imaging surface.
4. optical lens as claimed in claim 1 or 2, which is characterized in that an a whole focal length F and image height Y is further included, and
0.2≤F/Y and/or F/Y≤0.6.
5. optical lens as claimed in claim 1 or 2, which is characterized in that further include a field of view angle FOV, an image height Y and one
Aperture FNO, and (FNO*TTL)/(FOV*Y)≤0.03, wherein TTL be first lens object side surface along an optical axis to one one-tenth
The distance of image planes, or for first lens object side surface central point to the imaging surface substantive vertical range.
6. optical lens as claimed in claim 1 or 2, which is characterized in that further include a whole focal length F, and d is that the third is saturating
The distance between the object side surface on the image side surface of mirror and the 4th lens, then 0.0≤d/F and/or d/F≤0.1.
7. optical lens as claimed in claim 1 or 2, which is characterized in that the image side surface of the 7th lens has a contrary flexure
Point, the distance value of the point of inflexion to an optical axis is h14, and the Radius of the 7th lens is H14, then 0.5≤│ h14/H14 │
And/or │≤0.8 │ h14/H14.
8. the optical lens as described in claims 1 or 2 item, which is characterized in that the image side surface of the 7th lens is anti-with one
The development length that intersection point to point of inflexion of Qu Dian, the image side surface and an optical axis is projected to the position of the optical axis is δ 7, │ δ
│≤0.4 7/D7, and D7 is the thickness of a central point of the 7th lens.
9. optical lens as claimed in claim 1 or 2, which is characterized in that second lens have negative diopter, and the third is saturating
Mirror has positive diopter, and the 5th lens have negative diopter, and the 6th lens have positive diopter.
10. optical lens as claimed in claim 1 or 2, which is characterized in that second lens have positive diopter, the third
Lens have negative diopter, and the 5th lens have positive diopter, and the 6th lens have negative diopter.
11. optical lens as claimed in claim 1 or 2, which is characterized in that first lens are a meniscus, a concave-concave
Lens or a plano-concave lens, second lens are a meniscus or a biconvex lens, the third lens be a biconvex lens or
One meniscus, the 4th lens are a biconvex lens, and the 5th lens are a biconcave lens or a biconvex lens, and the 6th thoroughly
Mirror is a biconvex lens or a meniscus or the 7th lens are a biconcave lens or a meniscus.
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