CN106324815A - Zoom lens system and lens - Google Patents
Zoom lens system and lens Download PDFInfo
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- CN106324815A CN106324815A CN201510367784.6A CN201510367784A CN106324815A CN 106324815 A CN106324815 A CN 106324815A CN 201510367784 A CN201510367784 A CN 201510367784A CN 106324815 A CN106324815 A CN 106324815A
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Abstract
The invention relates to the field of optical instruments, and particularly relates to a zoom lens system and a lens, so as to solve the problem that high-definition screen display requirements can not be met in the prior art. The zoom lens system provided by the embodiment of the invention comprises a first lens group, an aperture diaphragm and a second lens group sequentially from an object side to an image side, wherein the second lens group comprises a first lens with positive focal power, a second lens with positive focal power, a first subgroup with negative focal power, a third lens with negative focal power, a fourth lens with positive focal power, a second subgroup with negative focal power, a fifth lens with positive focal power and a sixth lens with negative focal power; the first subgroup comprises at least one lens; the second subgroup comprises at least one lens; and the fifth lens and the sixth lens are glued together. The zoom lens system can effectively reduce dispersion, the whole system has little chromatism due to the glued structure, the structure is stable, and imaging is facilitated.
Description
Technical field
The present invention relates to optical instrument field, particularly to a kind of zoom-lens system and camera lens.
Background technology
Along with high definition picture presents the development of technology, 1080P high definition picture cannot meet the demand of people,
4K technology is arisen at the historic moment；With in recent years, data transmission technology, data storage technology, image procossing skill
Art and the technological innovation of HDTV Display Technique and breakthrough so that the ultra high-definition realizing 4K resolution is drawn
Face is in being possibly realized, and will become development trend from now on；This just requires camera lens (lens combination)
There is higher resolution, to meet the imaging requirements of 4K video camera.
Along with improvement and the raising of optical material performance of lens processing technique, zoom-lens system has obtained length
Foot development, but current existing zoom-lens system, it is seen that under optical mode, level of resolution is only capable of meeting 500
The video camera demand of (great majority are all below 2,000,000 pixels) below ten thousand pixels；And night is switched to red
Under external schema, confocal poor performance, actual imaging definition is more worse than visible ray effect.Cause this phenomenon
Main cause be: existing zoom-lens system use lens planform more single, difformity
Lens can not well combine, the performance of optical glass material is the most backward, parameters and image-forming condition
Can not well mate so that the spherical aberration of lens combination, coma, astigmatism, the curvature of field, ratio chromatism, position
Aberration is the most well corrected, thus cannot realize higher optical property.
In sum, it is relatively low to there is bigger aberration, imaging resolution in existing zoom-lens system and camera lens,
Present high definition picture display requirement cannot be met.
Summary of the invention
The present invention provides a kind of zoom-lens system and camera lens, cannot meet high definition picture in order to solve prior art
The problem that face display requires.
Embodiments provide a kind of zoom-lens system, wrap the most successively along optical axis
Include: there is the first battery of lens of negative power, aperture diaphragm and second battery of lens with positive light coke；
Described second battery of lens includes the most successively along optical axis: have the first saturating of positive light coke
Mirror, has the second lens of positive light coke, has the first subgroup of negative power, has the of negative power
Three lens, have the 4th lens of positive light coke, have the second subgroup of negative power, have positive light coke
The 5th lens and there are the 6th lens of negative power；
Described first subgroup includes at least one lens；
Described second subgroup includes at least one lens；
Described 5th lens are combined with described 6th lens glue.
Owing to the second battery of lens of the embodiment of the present invention being selected the lens of two positive light cokes near thing side
Effectively light can be restrained, increase light intensity；Two lens glues near image side are combined in one
Rise so that whole zoom-lens system aberration is less, and system structure is stable, thus improves image quality.
Optionally, described in have the first lens of positive light coke be the first biconvex lens, and described first pair
The refractive index of convex lens is not less than setting threshold value.
Owing to the Main Function of the first biconvex lens of the embodiment of the present invention is to the light incident from aperture diaphragm
Line is restrained, main correction system coma, astigmatism, and refractive index is the highest mates rational Abbe number simultaneously,
Acquired effect is the best, limits the refractive index of the first biconvex lens not less than setting threshold value 1.7, Ke Yiyou
Effect ensures the convergence to incident light.
Optionally, described in have the second lens of positive light coke be the second biconvex lens, described second lenticular
Mirror is glued together with described first subgroup, and the Abbe number of described second biconvex lens is more than 80.
Owing to the Main Function of the second biconvex lens of the embodiment of the present invention is to the light incident from aperture diaphragm
Line is restrained, and the Abbe number of simultaneously defined second biconvex lens should be greater than 80, can effectively reduce dispersion,
Improving image quality, the second biconvex lens and the first subgroup are glued together, can effectively reduce aberration, carry
High Iimaging Stability.
Optionally, described first subgroup includes the most successively along optical axis: focal power is negative
One biconcave lens and focal power are the 3rd positive biconvex lens；
Described first biconcave lens and the 3rd biconvex lens are glued together.
Owing to the first biconcave lens and the 3rd biconvex lens of the embodiment of the present invention are glued together, glued knot
Structure can effectively eliminate system aberration, improves image quality, and lens system structure can be made more stable.
Optionally, the 3rd lens described in negative power are the second biconcave lens；
Described 4th lens with positive light coke are the 4th biconvex lens；
Described second biconcave lens and described 4th biconvex lens are glued together.
Owing to the second battery of lens of the embodiment of the present invention includes the second biconcave lens and the 4th biconvex lens, can
Effectively to balance the spherical aberration of system, coma, astigmatism, thus improve image quality.
Optionally, the Abbe number of described second biconcave lens is more than 65, and refractive index is less than 1.55.
Owing to the Abbe number of the second biconcave lens of the embodiment of the present invention is more than 65, refractive index is less than 1.55,
Can be effectively ensured when eyeglass deviation optical axis, image quality change is little, thus improves the steady of lens combination
Qualitative.
Optionally, described second subgroup includes the most successively along optical axis: focal power is positive
One meniscus lens and focal power are the second negative meniscus lens；
Described first meniscus lens and described second meniscus lens are glued together；
Wherein, the convex surface of described first meniscus lens and described second meniscus lens is all towards thing side.
Owing to the second subgroup of the embodiment of the present invention includes two meniscus lens, meniscus lens one side is convex
Face, one side is the characteristic of concave surface, can reduce spherical aberration to greatest extent, thus improve image quality, two
Meniscus lens is glued together, and glued structure can effectively eliminate system aberration, improves image quality, and
And lens system structure can be made more stable.
Optionally, described 5th lens are respectively the 5th biconvex lens with described 6th lens and the 3rd concave-concave is saturating
Mirror；
The Abbe number of described 5th biconvex lens is more than 80；
The refractive index of described 5th biconvex lens less than the refractive index of described 3rd biconcave lens, described 5th pair
The Abbe number of convex lens is more than the Abbe number of described 3rd biconcave lens.
Owing to the Abbe number of embodiment of the present invention restriction the 5th biconvex lens is more than 80, can effectively reduce color
Dissipating, the 5th biconvex lens and the 3rd biconcave lens are glued together, can effectively eliminate system aberration, make
Mirror system structure is more stable, it is easy to produces, and can improve system imaging quality.
Optionally, the first battery of lens, include the most successively along optical axis: focal power is negative
Three meniscus lens, the 4th biconcave lens and focal power are the 4th positive meniscus lens；Wherein, described 3rd curved
The convex surface of month lens and the 4th meniscus lens is all towards thing side.
Mode owing to using positive minus lens to combine in the first battery of lens of the embodiment of the present invention is conducive to balance
System spherical aberration, uses three lens can effectively reduce off-axis aberration, improves image quality.
Optionally, in zoom-lens system, the focal distance f of the first battery of lens 11, zoom-lens system is the shortest
Focal distance f during coke-like statewWith the zoom-lens system focal distance f when focal length statetBetween, under meeting
Row conditional:
1.85≤│f1│/(fw·ft)1/2≤2.25 ⑴。
Focal distance f due to the first battery of lens 1 of the embodiment of the present invention1Limit in the reasonable scope so that lens
The zoom rate of system is bigger, and can effectively reduce aberration, more conducively imaging.
Optionally, in zoom-lens system, the focal distance f of the second battery of lens 32, zoom-lens system is the shortest
Focal distance f during coke-like statewAnd the focal distance f that zoom-lens system is when focal length statetBetween, meet following
Conditional:
0.8<f2/fw<1.2 ⑵。
Focal distance f due to the second battery of lens 3 of the embodiment of the present invention2Size limits in the reasonable scope so that
The zoom rate of lens combination is bigger, and can effectively reduce aberration, thus more conducively imaging.
Optionally, the zoom-lens system focal distance f when the shortest coke-like statewWith zoom-lens system in focal length
Focal distance f during statetBetween and the first battery of lens 1 in two eyeglass (the 3rd bent moons with negative power
Lens and the 4th biconcave lens) mean refractive index N of glass materialn, meet following condition formulae:
0.4<Nn·fw/ft<0.55 ⑶。
Owing to the lens on light line with negative power of the embodiment of the present invention has disperse function, and reflect
Rate is the biggest, the most obvious to the disperse function of light, limits in the first battery of lens 1 two and has negative power
Mean refractive index N of the glass material of eyeglassnIn a scope determined, limit the first battery of lens 1 to light
The degree that line dissipates, beneficially system imaging, thus improve image quality.
A kind of camera lens in the embodiment of the present invention, including above-mentioned zoom-lens system.
Due to the camera lens of the embodiment of the present invention, using above-mentioned zoom-lens system, aberration obtains school well
Just, imaging resolution is high, and image quality is excellent.
Accompanying drawing explanation
Fig. 1 (a) is embodiment of the present invention zoom-lens system knot respectively when short coke-like state and focal length state
Structure schematic diagram；
Fig. 1 (b) is the structural representation of the second battery of lens changeable type in embodiment of the present invention zoom-lens system
One；
Fig. 1 (c) is the structural representation of the second battery of lens changeable type in embodiment of the present invention zoom-lens system
Two；
Fig. 1 (d) is the structural representation of the second battery of lens changeable type in embodiment of the present invention zoom-lens system
Three；
Fig. 1 (e) is the structural representation of the second battery of lens changeable type in embodiment of the present invention zoom-lens system
Four；
Fig. 1 (f) is the structural representation of the second battery of lens changeable type in embodiment of the present invention zoom-lens system
Five；
Fig. 1 (g) is the structural representation of the second battery of lens changeable type in embodiment of the present invention zoom-lens system
Six；
Fig. 2 is the structural representation of embodiment of the present invention camera lens；
Fig. 3 is the song of the optical transfer function that embodiment of the present invention zoom-lens system is corresponding when short coke-like state
Line chart；
Fig. 4 is the song of the optical transfer function that embodiment of the present invention zoom-lens system is corresponding when focal length state
Line chart；
Fig. 5 (a) is the light sector diagram one that embodiment of the present invention zoom-lens system is corresponding when short coke-like state；
Fig. 5 (b) is the light sector diagram two that embodiment of the present invention zoom-lens system is corresponding when short coke-like state；
Fig. 5 (c) is the light sector diagram three that embodiment of the present invention zoom-lens system is corresponding when short coke-like state；
Fig. 5 (d) is the light sector diagram four that embodiment of the present invention zoom-lens system is corresponding when short coke-like state；
Fig. 5 (e) is the light sector diagram five that embodiment of the present invention zoom-lens system is corresponding when short coke-like state；
Fig. 6 (a) is the light sector diagram one that embodiment of the present invention zoom-lens system is corresponding when focal length state；
Fig. 6 (b) is the light sector diagram two that embodiment of the present invention zoom-lens system is corresponding when focal length state；
Fig. 6 (c) is the light sector diagram three that embodiment of the present invention zoom-lens system is corresponding when focal length state；
Fig. 6 (d) is the light sector diagram four that embodiment of the present invention zoom-lens system is corresponding when focal length state；
Fig. 6 (e) is the light sector diagram five that embodiment of the present invention zoom-lens system is corresponding when focal length state；
Fig. 7 is the point range figure that embodiment of the present invention zoom-lens system is corresponding when short coke-like state；
Fig. 8 is the point range figure that embodiment of the present invention zoom-lens system is corresponding when focal length state；
Fig. 9 (a) is the curvature of field figure that embodiment of the present invention zoom-lens system is corresponding when short coke-like state；
Fig. 9 (b) is the distortion figure that embodiment of the present invention zoom-lens system is corresponding when short coke-like state；
Figure 10 (a) is the curvature of field figure that embodiment of the present invention zoom-lens system is corresponding when focal length state；
Figure 10 (b) is the distortion figure that embodiment of the present invention zoom-lens system is corresponding when focal length state；
Figure 11 is the chromaticity difference diagram that embodiment of the present invention zoom-lens system is corresponding when short coke-like state；
Figure 12 is the chromaticity difference diagram that embodiment of the present invention zoom-lens system is corresponding when focal length state；
Figure 13 is that the optics that embodiment of the present invention zoom-lens system is corresponding when short burnt infrared mode state passes
The curve chart of delivery function；
Figure 14 is that the optics that embodiment of the present invention zoom-lens system is corresponding when focal length infrared mode state passes
The curve chart of delivery function.
Detailed description of the invention
Embodiments provide a kind of zoom-lens system, wrap the most successively along optical axis
Include: there is the first battery of lens of negative power, aperture diaphragm and second battery of lens with positive light coke；Its
In, the second battery of lens includes the most successively along optical axis: have the first lens of positive light coke,
There are the second lens of positive light coke, there is the first subgroup of negative power, there is the 3rd saturating of negative power
Mirror, has the 4th lens of positive light coke, has the second subgroup of negative power, has the of positive light coke
Five lens and the 6th lens with negative power；First subgroup includes at least one lens；Second subgroup bag
Include at least one lens；5th lens are combined with described 6th lens glue.This zoom-lens system
In second battery of lens, near the lens of two positive light cokes of thing side, can effectively light be received
Hold back, near the structure that two lens of image side are glued so that whole zoom-lens system aberration is less, is
System Stability Analysis of Structures, the most more preferable imaging.
A kind of zoom-lens system that the present invention provides, can be applicable to safety defense monitoring system, and TV, film are taken the photograph
Picture, looks in the distance, the sciemtifec and technical sphere such as photomicrography, it is possible to applies and explores in cosmic space, and guided missile test is pursued and attacked
The military fields such as observation rocket record.This zoom-lens system is with its high-resolution level and the most infrared night
Imaging system is can be widely applied to depending on effect.
Below in conjunction with Figure of description, the embodiment of the present invention is described in further detail.
As shown in Fig. 1 (a), for the structural representation of a kind of zoom-lens system that case study on implementation of the present invention provides
Figure.This zoom-lens system, includes the most successively along optical axis: have the first of negative power
Battery of lens 1, aperture diaphragm 2 and second battery of lens 3 with positive light coke；
Second battery of lens 3 includes the most successively along optical axis: have the first biconvex of positive light coke
Lens 7, have the second biconvex lens 8 of positive light coke, have the first subgroup of negative power, have negative
Second biconcave lens 11 of focal power, has the 4th biconvex lens 12 of positive light coke, has negative power
The second subgroup, the 5th biconvex lens 15 with positive light coke and the 3rd concave-concave with negative power are saturating
Mirror lens 16；
First subgroup includes that focal power is the first negative biconcave lens 9 and focal power is the 3rd positive biconvex lens
10；
Second subgroup includes that focal power is positive first meniscus lens 13 and focal power is the second negative meniscus lens
14；
5th biconvex lens 15 is glued together with the 3rd biconcave lens lens 16.
In second battery of lens 3, light can be received by the first biconvex lens 7 and the second biconvex lens 8 effectively
Hold back；The 5th biconvex lens 15 and the structure of the 3rd biconcave lens lens 16 gluing near image side so that
Whole zoom-lens system aberration is less, and system structure is stable, the most more preferable imaging.
In second battery of lens 3, the 3rd biconcave lens lens 16 can also is that planoconcave lens, its structure such as Fig. 1
Shown in (b), such as the first planoconcave lens 17 in figure.
In second battery of lens 3, the 3rd biconcave lens lens 16 can also is that focal power is negative meniscus lens,
Shown in its structure such as Fig. 1 (c), such as the 4th meniscus lens 18 in figure.
In second battery of lens 3, it is negative biconcave lens that the first subgroup can also only include a focal power, as
Shown in Fig. 1 (d), such as the 5th biconcave lens 19 in figure.
In second battery of lens 3, it is negative meniscus lens that the first subgroup can also only include a focal power, as
Shown in Fig. 1 (e), such as the 5th meniscus lens 20 in figure.
In second battery of lens 3, it is negative meniscus lens that the second subgroup can also only include a focal power, as
Shown in Fig. 1 (f), such as the 6th meniscus lens 21 in figure.
In second battery of lens 3, it is negative biconcave lens that the second subgroup can also only include a focal power, as
Shown in Fig. 1 (g), such as the 6th biconcave lens 22 in figure.
The structure of a kind of camera lens that the embodiment of the present invention provides also includes light filter GF and imaging surface IMA, edge
Optical axis includes the most successively: the first battery of lens 1, aperture diaphragm 2, the second battery of lens 3, filter
Color chips GF and imaging surface IMA；The structural representation of camera lens as shown in Figure 2, it is excellent that this figure is only the present invention
Select the structural representation of embodiment.And for comprise just like Fig. 1 (b), 1 (c), 1 (d), 1 (e), 1
F the camera lens of () and the second battery of lens shown in 1 (g), is given the most in the accompanying drawings.
Optionally, the refractive index of the first biconvex lens 7 is not less than setting threshold value.
In the embodiment of the present invention, the Main Function of the first biconvex lens 7 is to enter the light incident from aperture diaphragm
Row convergence, main correction system coma, astigmatism, refractive index is the highest mates rational Abbe number, institute simultaneously
The effect obtained is the best, limits the refractive index of the first biconvex lens 7 not less than setting threshold value 1.7, Ke Yiyou
Effect ensures the convergence to incident light.
Optionally, the second biconvex lens 8 is glued together with the first subgroup, and the second biconvex lens 8
Abbe number is more than 80.
In the embodiment of the present invention, in the second biconvex lens 8 and the first subgroup, the first biconcave lens 9 is glued at one
Rising, glued structure can effectively eliminate system aberration, and the Abbe number limiting the second biconvex lens 8 is more than
80, can effectively reduce dispersion, improve image quality.
Optionally, the first biconcave lens 9 and the 3rd biconvex lens 10 are glued together.
In the embodiment of the present invention, the first biconcave lens 9 and the 3rd biconvex lens 10 are glued together, glued
Structure can effectively eliminate system aberration, improves image quality, and lens system structure can be made more steady
Fixed.
Optionally, the second biconcave lens 11 and the 4th biconvex lens 12 are glued together.
In the embodiment of the present invention, the second battery of lens 3 includes the second biconcave lens 11 glued together and
Four biconvex lens 12, glued structure can effectively eliminate system aberration, make lens system structure more stable,
At the same time it can also be effectively balance the spherical aberration of system, coma, astigmatism, thus improve image quality.
Optionally, the Abbe number of the second biconcave lens 11 is more than 65, and refractive index is less than 1.55.
In the embodiment of the present invention, the Abbe number limiting the second biconcave lens 11 is less than with refractive index more than 65
1.55, can be effectively ensured when eyeglass deviation optical axis, image quality change is little, thus improves lens system
The stability of system.
Optionally, the first meniscus lens 13 and the second meniscus lens 14 are glued together；
Wherein, the convex surface of the first meniscus lens 13 and the second meniscus lens 14 is all towards thing side.
In the embodiment of the present invention, the second subgroup uses two meniscus lens, it may be assumed that the first meniscus lens 13
With the second meniscus lens 14, meniscus lens one side is convex surface, and one side is the characteristic of concave surface, can be to greatest extent
Ground reduces spherical aberration, thus improves image quality.
Optionally, the Abbe number of the 5th biconvex lens 15 is more than 80；And the folding of the 5th biconvex lens 15
Penetrating the rate refractive index less than the 3rd biconcave lens 16, the Abbe number of the 5th biconvex lens 15 is more than the 3rd pair
The Abbe number of concavees lens 16.
Owing to the Abbe number of embodiment of the present invention restriction the 5th biconvex lens 15 is more than 80, can effectively subtract
Few dispersion, the 5th biconvex lens 15 and the 3rd biconcave lens 16 are glued together, can effectively eliminate system
Aberration, makes lens system structure more stable, it is easy to produces, and can improve system imaging quality.
Optionally, the first battery of lens 1, include the most successively along optical axis: focal power is negative
3rd meniscus lens 4, the 4th biconcave lens 5 and focal power are the 4th positive meniscus lens 6；Wherein,
The convex surface of three meniscus lens 4 and the 4th meniscus lens 6 is all towards thing side.
The mode using positive minus lens to combine in first battery of lens 1 in the embodiment of the present invention is conducive to balancing system
Spherical aberration, uses three lens can effectively reduce off-axis aberration, improves image quality.
Optionally, in zoom-lens system, the focal distance f 1 of the first battery of lens 1, zoom-lens system are the shortest
Between focal distance f w and zoom-lens system focal distance f t when focal length state during coke-like state, meet following
Conditional:
1.85≤│f1│/(fw·ft)1/2≤2.25 ⑴。
In the embodiment of the present invention, by the focal distance f of the first battery of lens 11Size limits in the reasonable scope so that
The zoom rate of lens combination is bigger, and can effectively reduce aberration, thus more conducively imaging.
Optionally, in zoom-lens system, the focal distance f of the second battery of lens 32, zoom-lens system is the shortest
Focal distance f during coke-like statewAnd the focal distance f that zoom-lens system is when focal length statetBetween, meet following
Conditional:
0.8<f2/fw<1.2 ⑵。
In the embodiment of the present invention, by the focal distance f of the second battery of lens 32Size limits in the reasonable scope so that
The zoom rate of lens combination is bigger, and can effectively reduce aberration, thus more conducively imaging.
Optionally, in zoom-lens system, the zoom-lens system focal distance f when the shortest coke-like statewAnd zoom
The lens combination focal distance f when focal length statetBetween and the first battery of lens 1 in two there is negative power
Mean refractive index N of glass material of eyeglass (the 3rd meniscus lens 4 and the 4th biconcave lens 5)n, full
Foot following condition formulae:
0.4<Nn·fw/ft<0.55 ⑶。
In the embodiment of the present invention, there is the lens on light line of negative power there is disperse function, and refractive index
The biggest, the most obvious to the disperse function of light, limit two mirrors with negative power in the first battery of lens 1
Mean refractive index N of the glass material of sheetnIn a scope determined, limit the first battery of lens 1 to light
The degree dissipated, beneficially system imaging, thus improve image quality.
A kind of camera lens in the embodiment of the present invention, have employed above-mentioned zoom-lens system.
Camera lens in the embodiment of the present invention, uses above-mentioned zoom-lens system, and aberration is corrected well,
Imaging resolution is high, and image quality is excellent.
In zoom-lens system, the parameters of each lens meets the condition listed by table 1:
Table 1
Wherein, R1 is the lens radius of curvature towards the face of thing side, and R2 is the song in the lens face towards image side
Rate radius, Tc is lens center thickness, and Nd is the refractive index of lens, and Vd is the Abbe number of lens.
In the embodiment of the present invention, limit the radius of curvature of 13 lens, the center thickness used, selected
By Abbe number and the refractive index of glass material so that the planform of zoom-lens system, Abbe number etc.
Parameter is mated with image-forming condition, so make the spherical aberration of lens combination, coma, astigmatism, the curvature of field, ratio chromatism,
Chromatism of position is well corrected, and reaches higher resolution.
Optionally, in the first battery of lens 1, the center of the 3rd meniscus lens 4 and the 4th biconcave lens 5
The span at interval in the direction of the optical axis, center is [7.5mm, 10.5mm]；4th biconcave lens 5
The span at interval in the direction of the optical axis, the center of center and the 4th meniscus lens 6 is [0mm, 4mm].
In the second battery of lens 3, the center of the first biconvex lens 7 and the center of the second biconvex lens 8 are in optical axis side
The span at interval upwards is [0.1mm, 0.5mm]；Second biconvex lens the 8, first biconcave lens 9
Glued with the 3rd biconvex lens 10 three, form three balsaming lenss；The center of the 3rd biconvex lens 10 and
The span at interval in the direction of the optical axis, the center of two biconcave lenss 11 is [0.5mm, 1.5mm]；The
Both two biconcave lenss 11 and the 4th biconvex lens 12 are glued, form cemented doublet；4th biconvex lens
The span at the center of 12 and interval in the direction of the optical axis, the center of the first meniscus lens 13 is
[0.1mm, 0.5mm]；Both first meniscus lens 13 and the second meniscus lens 14 are glued, are formed double glued
Lens；The center of the second meniscus lens 14 and interval in the direction of the optical axis, the center of the 5th biconvex lens 15
Span be [0.1mm, 1mm]；Both 5th biconvex lens 15 and the 3rd biconcave lens 16 are glued,
Form cemented doublet.
In the embodiment of the present invention, to spacing between each lens in the first battery of lens 1 and the second battery of lens 3
Scope is defined so that the planform of zoom-lens system is preferably mated with image-forming condition, maximum limit
The aberration of degree ground correction system, it is achieved higher resolution and image quality.
Optionally, in the first battery of lens 1, the center of the 3rd meniscus lens 4 and the 4th biconcave lens 5
Center in the direction of the optical axis be spaced apart 10mm；The center of the 4th biconcave lens 5 and the 4th meniscus lens 6
Center in the direction of the optical axis be spaced apart 2.4mm.
In second battery of lens 3, the center of the first biconvex lens 7 and the center of the second biconvex lens 8 are at optical axis
It is spaced apart 0.1mm on direction；The center of the 3rd biconvex lens 10 and the center of the second biconcave lens 11 exist
It is spaced apart 0.7mm on optical axis direction；In the center of the 4th biconvex lens 12 and the first meniscus lens 13
The heart in the direction of the optical axis be spaced apart 0.1mm；The center of the second meniscus lens 14 and the 5th biconvex lens 15
Center in the direction of the optical axis be spaced apart 0.3mm.
In specific implementation process, the parameter of each lens of described zoom system, pancreatic system meets the condition listed by table 2:
Table 2
Meet said structure feature at zoom-lens system, and the parameter of each lens meet above-mentioned requirements,
This zoom-lens system has a following optical index:
Optics overall length TTL≤95.7mm；
The system focal f of zoom lens is 3.7-16mm；
The system image planes of zoom lens: 1/1.7；
Aperture Range F is 1.5-2.6.
The present invention will be described with specific embodiment below in conjunction with the accompanying drawings.
In an embodiment, in described zoom-lens system, each lens meet condition determined by table 2；And this change
Focus lens system is the most satisfied: in the first battery of lens 1, the center of the 3rd meniscus lens 4 and the 4th biconcave lens
The center of 5 in the direction of the optical axis be spaced apart 10mm；Center and the 4th bent moon of the 4th biconcave lens 5 are saturating
The center of mirror 6 in the direction of the optical axis be spaced apart 2.4mm；In second battery of lens 3, the first biconvex lens 7
Center and the second biconvex lens 8 center in the direction of the optical axis be spaced apart 0.1mm；3rd biconvex lens
The center of 10 and the center of the second biconcave lens 11 in the direction of the optical axis be spaced apart 0.7mm；4th biconvex
The center of lens 12 and the center of the first meniscus lens 13 in the direction of the optical axis be spaced apart 0.1mm；Second
The center of meniscus lens 14 and the center of the 5th biconvex lens 15 in the direction of the optical axis be spaced apart 0.3mm.
Below in conjunction with this zoom-lens system optical transfer function (Modulation Transfer Function,
MTF) curve chart, the zoom-lens system providing the embodiment of the present invention realizes the situation of ultrahigh resolution and enters
Row explanation.Wherein, optical transfer function is used for evaluating the image quality of an optical system, its curve is the highest,
The most smooth, show that the image quality of system is the best.
If the curve chart of the MTF that zoom-lens system is corresponding when short coke-like state is with focal length state is more consistent,
Under two states, MTF curve is the most smoother and concentrates, and full filed MTF meansigma methods is the highest, shows
This zoom-lens system can ensure the most excellent image quality, this zoom in the range of whole variable focal length
Lens combination is to various aberrations, such as: spherical aberration, coma, astigmatism, the curvature of field, ratio chromatism, chromatism of position etc.
Can well correct.
Under two states, MTF curve is the most smoother as shown in Figure 3,4 and concentrates, and full filed MTF
Meansigma methods is more than 0.64, and the zoom-lens system that therefore embodiment of the present invention provides can reach the highest dividing
Resolution, it is possible to meet 12,000,000 pixels and the imaging requirements of 4K video camera.
Carry out detailed Optical system below by zoom-lens system, be further described the present embodiment
The zoom-lens system provided.
Light corresponding when the light sector diagram corresponding when zoom-lens system short coke-like state is with focal length state
In sector diagram, in light sector diagram, aberration curve is closer to x-axis, the most smooth, then the aberration school of system is described
Positive is the best.
As shown in Fig. 5 (a), zoom-lens system is under short coke-like state, and image height is the light that 0mm visual field is corresponding
Line sector diagram；Zoom-lens system shown in Fig. 5 (b) is under short coke-like state, and image height is 2.3mm visual field pair
The light sector diagram answered；Zoom-lens system shown in Fig. 5 (c) is under short coke-like state, and image height is 3.0mm
The light sector diagram that visual field is corresponding；Zoom-lens system shown in Fig. 5 (d) is under short coke-like state, and image height is
The light sector diagram that 3.6mm visual field is corresponding；Zoom-lens system shown in Fig. 5 (e) under short coke-like state, as
The light sector diagram that a height of 4.4mm visual field is corresponding；
As shown in Fig. 6 (a), zoom-lens system is under focal length state, and image height is the light that 0mm visual field is corresponding
Line sector diagram；Zoom-lens system shown in Fig. 6 (b) is under focal length state, and image height is 2.3mm visual field pair
The light sector diagram answered；Zoom-lens system shown in Fig. 6 (c) is under focal length state, and image height is 3.0mm
The light sector diagram that visual field is corresponding；Zoom-lens system shown in Fig. 6 (d) is under focal length state, and image height is
The light sector diagram that 3.6mm visual field is corresponding；Zoom-lens system shown in Fig. 6 (e) under focal length state, as
The light sector diagram that a height of 4.4mm visual field is corresponding.
In above ten width figures, EYRepresent meridian direction aberration；PYRepresent meridian direction normalization entrance pupil；EXTable
Show sagitta of arc direction aberration；EXRepresent sagitta of arc direction normalization entrance pupil.
From above ten width figures, use the zoom-lens system that the present embodiment provides, the aberration curve obtained
Smooth and be sufficiently close to x-axis；Therefore, in the range of whole variable focal length, can ensure the most excellent
Image quality.
The point range that the point range figure corresponding when zoom-lens system is in short coke-like state is corresponding with when focal length state
In figure, in point range figure, the radius size of speckle is the least, and image quality is the best, illustrates at whole variable focal length model
In enclosing, the most excellent image quality can be ensured, the pixl size a size of 1.85 of such as 4K video camera
μm.Show that the heart size of the speckle of full filed is both less than the pixl size of 2 times as shown in Figure 7, Figure 8,
Center is even less than the pixl size equal to 1 times, therefore, uses the zoom-lens system that the present embodiment provides,
System aberration correction is relatively good, and image quality is excellent.
The curvature of field figure of zoom-lens system is made up of three curve T and three curve S, and three curve T are respectively
Represent the meridional beam (Tangential Rays) that three kinds of wavelength (486nm, 587nm and 656nm) are corresponding
Aberration, three curve S represent the arc that three kinds of wavelength (486nm, 587nm and 656nm) are corresponding respectively
Vowing the aberration of light beam (Sagittial Rays), meridianal curvature of field value and Sagittal field curvature value are the least, illustrate that zoom is saturating
Mirror system image quality is the best.
In the distortion figure of zoom-lens system, distortion curve, the closer to y-axis, illustrates the abnormal of zoom-lens system
Become the least.
As shown in Fig. 9 (a), for the curvature of field figure meridianal curvature of field value that zoom-lens system is corresponding when short coke-like state
Controlling in the range of 0～0.015mm, Sagittal field curvature value controls in the range of 0～0.01mm.
As shown in Fig. 9 (b), for the distortion figure that zoom-lens system is corresponding when short coke-like state, wherein distort
Rate controls in the range of-27.5%～0.
As shown in Figure 10 (a), for the curvature of field figure that zoom-lens system is corresponding when focal length state, wherein,
Meridianal curvature of field value controls in the range of 0～0.05mm, and Sagittal field curvature value controls in the range of 0～0.05mm.
As shown in Figure 10 (b), for the distortion figure that zoom-lens system is corresponding when focal length state, the most abnormal
Variability controls in the range of-2.3%～0.
In the chromaticity difference diagram of zoom-lens system, curve represents primary color aberration characteristics curve, color aberration characteristics curve
The closer to y-axis, illustrate that the aberration of zoom-lens system is the least.
As shown in Figure 11, Figure 12, wherein, Figure 11 is the color that zoom-lens system is corresponding when focal length state
Difference figure, it is seen then that primary Difference Control is between-0.02～+0.02；Figure 12 is that zoom-lens system is in focal length
Chromaticity difference diagram corresponding during state, it is seen then that primary Difference Control is between-0.05～+0.05.
From above-mentioned Fig. 5 (a), 5 (b), 5 (c), 5 (d), 5 (e), Fig. 6 (a), 6 (b), 6 (c),
6 (d), 6 (e), Fig. 7, Fig. 8, Fig. 9, Figure 10, Figure 11 and Figure 12 understand, and the present embodiment provides
Zoom-lens system, its produce spherical aberration, coma, astigmatism, the curvature of field and aberration be all controlled in less
In the range of, distortion is controlled in rational numerical value.
In zoom-lens system optical transfer function figure, short burnt infrared mode state and focal length infrared mode shape
The curve chart of MTF corresponding during state is more consistent, and under two states, MTF curve is the most smoother and concentrates,
And full filed MTF meansigma methods the highest (the infrared mtf value of common lens is generally≤0.3), zoom is described
Lens combination has outstanding level of resolution and optical property at infrared confocal aspect.
As shown in Figure 13, Figure 14, wherein, Figure 13 is that zoom-lens system is when short burnt infrared mode state
The curve chart of corresponding optical transfer function；Figure 14 is that zoom-lens system is when focal length infrared mode state
The curve chart of corresponding optical transfer function；Understanding from this two width figure, in two figures, the curve chart of MTF is relatively
Unanimously, under two states, MTF curve is the most smoother and concentrates, and full filed MTF meansigma methods reaches
More than 0.55, exceed far away the infrared mtf value (generally≤0.3) of common lens.The visible embodiment of the present invention
The zoom-lens system provided also has outstanding level of resolution and optics at infrared confocal aspect
Performance.
It can be seen from the above: the zoom-lens system that the embodiment of the present invention provides, and uses 13 spies
The optical lens of fixed structure shape, and be arranged in order to image side according to from thing side, and by each optical lens
The distribution of the focal power of mirror, have employed ED optical glass material so that zoom-lens system simultaneously
Planform, the parameter such as Abbe number mates with image-forming condition, and then make the spherical aberration of lens combination, coma,
Astigmatism, the curvature of field, ratio chromatism, chromatism of position are well corrected.
Embodiments provide a kind of zoom-lens system, in order to improve the resolution water of lens combination
Flat.The zoom-lens system that the present invention provides has the first battery of lens and two battery of lens knots of the second battery of lens
Structure, and each lens position in the first battery of lens and the second battery of lens is relatively fixed, by each optics
The distribution of power of lens so that the planform of zoom-lens system, parameter and the imaging such as abbe number
Condition is mated, and can effectively reduce the various aberrations of system, thus it is (the highest to reach higher resolution
Support 12,000,000 pixel camera machines) and more preferably infrared night vision effect, may apply to imaging device, real
Existing round-the-clock ultra high-definition picture shows.
Although preferred embodiments of the present invention have been described, but those skilled in the art once know base
This creativeness concept, then can make other change and amendment to these embodiments.So, appended right is wanted
Ask and be intended to be construed to include preferred embodiment and fall into all changes and the amendment of the scope of the invention.
Obviously, those skilled in the art can carry out various change and modification without deviating from this to the present invention
Bright spirit and scope.So, if the present invention these amendment and modification belong to the claims in the present invention and
Within the scope of its equivalent technologies, then the present invention is also intended to comprise these change and modification.
Claims (13)
1. a zoom-lens system, it is characterised in that include the most successively along optical axis:
There is the first battery of lens of negative power, aperture diaphragm and second battery of lens with positive light coke；
Described second battery of lens includes the most successively along optical axis: have the first saturating of positive light coke
Mirror, has the second lens of positive light coke, has the first subgroup of negative power, has the of negative power
Three lens, have the 4th lens of positive light coke, have the second subgroup of negative power, have positive light coke
The 5th lens and there are the 6th lens of negative power；
Described first subgroup includes at least one lens；
Described second subgroup includes at least one lens；
Described 5th lens are combined with described 6th lens glue.
2. zoom-lens system as claimed in claim 1, it is characterised in that described in there is positive light coke
The first lens be the first biconvex lens, and the refractive index of described first biconvex lens not less than set threshold
Value.
3. zoom-lens system as claimed in claim 1, it is characterised in that described in there is positive light coke
The second lens be the second biconvex lens, described second biconvex lens is glued together with described first subgroup,
And the Abbe number of described second biconvex lens is more than 80.
4. zoom-lens system as claimed in claim 1, it is characterised in that described first subgroup is along light
Axis includes the most successively: focal power is the first negative biconcave lens and focal power is positive the 3
Biconvex lens；
Described first biconcave lens and the 3rd biconvex lens are glued together.
5. zoom-lens system as claimed in claim 1, it is characterised in that described in there is negative power
The 3rd lens be the second biconcave lens；
Described 4th lens with positive light coke are the 4th biconvex lens；
Described second biconcave lens and described 4th biconvex lens are glued together.
6. zoom-lens system as claimed in claim 5, it is characterised in that described second biconcave lens
Abbe number more than 65, refractive index is less than 1.55.
7. zoom-lens system as claimed in claim 1, it is characterised in that described second subgroup is along light
Axis includes the most successively: focal power is the first positive meniscus lens and focal power is negative second
Meniscus lens；
Described first meniscus lens and described second meniscus lens are glued together；
Wherein, the convex surface of described first meniscus lens and described second meniscus lens is all towards thing side.
8. zoom-lens system as claimed in claim 1, it is characterised in that described 5th lens and institute
State the 6th lens and be respectively the 5th biconvex lens and the 3rd biconcave lens；
The Abbe number of described 5th biconvex lens is more than 80；
The refractive index of described 5th biconvex lens less than the refractive index of described 3rd biconcave lens, described 5th pair
The Abbe number of convex lens is more than the Abbe number of described 3rd biconcave lens.
9. zoom-lens system as claimed in claim 1, it is characterised in that described first battery of lens,
Include the most successively along optical axis: focal power is the 3rd negative meniscus lens, the 4th biconcave lens
It is the 4th positive meniscus lens with focal power；
The convex surface of described 3rd meniscus lens and the 4th meniscus lens is all towards thing side.
10. zoom-lens system as claimed in claim 1, it is characterised in that described zoom-lens system
Meet following condition formulae:
1.85≤│f1│/(fw·ft)1/2≤2.25
Wherein:
f1Represent the focal length of the first battery of lens；
fwRepresent the zoom-lens system focal length when the shortest coke-like state；
ftRepresent the zoom-lens system focal length when focal length state.
11. zoom-lens systems as claimed in claim 1, it is characterised in that described zoom-lens system
Meet following condition formulae:
0.8<f2/fw<1.2
Wherein:
f2Represent the focal length of the second battery of lens；
fwRepresent the zoom-lens system focal length when the shortest coke-like state.
12. zoom-lens systems as claimed in claim 9, it is characterised in that described zoom-lens system
Meet following condition formulae:
0.4<Nn·fw/ft<0.55
Wherein:
NnRefer to the mean refraction of the glass material of the 3rd meniscus lens and the 4th biconcave lens in the first battery of lens
Rate；
fwRepresent the zoom-lens system focal length when the shortest coke-like state；
ftRepresent the zoom-lens system focal length when focal length state.
13. 1 kinds of camera lenses, it is characterised in that include the zoom lens described in any one of claim 1～12
System.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510367784.6A CN106324815B (en) | 2015-06-26 | 2015-06-26 | A kind of zoom-lens system and camera lens |
| EP16811014.6A EP3311212B1 (en) | 2015-06-17 | 2016-06-16 | A zoom lens system |
| PCT/CN2016/086000 WO2016202273A1 (en) | 2015-06-17 | 2016-06-16 | A zoom lens system |
| US15/737,281 US10495860B2 (en) | 2015-06-17 | 2016-06-16 | Zoom lens system |
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| CN108627961A (en) * | 2018-05-04 | 2018-10-09 | 山东省科学院海洋仪器仪表研究所 | A kind of underwater varifocal imaging camera lens of object lens of large relative aperture |
| CN109884779A (en) * | 2019-03-15 | 2019-06-14 | 广东奥普特科技股份有限公司 | A kind of low distortion camera lens |
| CN109946769A (en) * | 2017-12-19 | 2019-06-28 | 康耐视公司 | Reduce the system and method for vision system zoom lens drift |
| CN110412743A (en) * | 2019-07-09 | 2019-11-05 | 浙江大华技术股份有限公司 | A kind of camera lens |
| CN111399200A (en) * | 2020-04-29 | 2020-07-10 | 苏州协尔智能光电有限公司 | Optical system and optical lens |
| CN112612114A (en) * | 2020-12-29 | 2021-04-06 | 福建福光天瞳光学有限公司 | Low-distortion six-lens type optical lens and imaging method thereof |
| CN112904542A (en) * | 2021-01-28 | 2021-06-04 | 中国科学院西安光学精密机械研究所 | Low-distortion high-definition continuous zooming optical system |
| CN117092800A (en) * | 2023-10-17 | 2023-11-21 | 江西联益光学有限公司 | zoom lens |
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| CN109946769B (en) * | 2017-12-19 | 2021-05-11 | 康耐视公司 | System and method for reducing zoom lens drift in a vision system |
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| CN112612114A (en) * | 2020-12-29 | 2021-04-06 | 福建福光天瞳光学有限公司 | Low-distortion six-lens type optical lens and imaging method thereof |
| CN112612114B (en) * | 2020-12-29 | 2023-09-19 | 福建福光天瞳光学有限公司 | Low-distortion six-piece optical lens and imaging method thereof |
| CN112904542A (en) * | 2021-01-28 | 2021-06-04 | 中国科学院西安光学精密机械研究所 | Low-distortion high-definition continuous zooming optical system |
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