CN105044891B - A kind of big target surface continuous zooming optical system - Google Patents
A kind of big target surface continuous zooming optical system Download PDFInfo
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- CN105044891B CN105044891B CN201510481734.0A CN201510481734A CN105044891B CN 105044891 B CN105044891 B CN 105044891B CN 201510481734 A CN201510481734 A CN 201510481734A CN 105044891 B CN105044891 B CN 105044891B
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Abstract
The present invention relates to a kind of big target surface continuous zooming optical system, including focal power is that positive first fixed group, focal power are that negative zoom group, focal power are negative compensation group and focal power is positive latter fixed group；The zoom of optical system is realized by the correspondingly motion of zoom group and compensation group.The continuous zooming optical system target surface is 1 inch, it is 1920 × 1080, the high definition CCD or cmos camera that Pixel size is 7.4 μm, target surface is 1 inch suitable for pixel count, it is 1920 × 1080, the high definition CCD or cmos camera that Pixel size is 5.5 μm, target surface is 2/3 inch to be also applied for pixel count.And the focal length of the optical system is 35mm~700mm, remote observation ability is correspondingly greatly improved, the airborne lidar for fluorescence of high-altitude flight can be applied to, and more remote target can be detected, and then the ability of scouting, strike and distant object identification is improved, its application is very broad.
Description
Technical field
The present invention relates to the visible light optical system of airborne opto-electronic device, and in particular to a kind of big target surface continuous zooming optical
System.
Background technology
The load-carrying of carrier aircraft and its voyage inversely, therefore, it is adaptable to the visible light optical system of airborne opto-electronic device
It is required that it has small volume, lightweight feature；For high altitude surveillance, percussion system, it is desirable to which optical system can be done greatly
The target search of scope can do the target following of small range, identification again.So, optical system should have focal length length, zoom ratio it is big,
The characteristics of high resolution.Future, airborne opto-electronic device progressively will replace past SD equipment, high definition CCD or CMOS by high definition
The target surface of image device is 2/3 inch or more than 1 inch, but existing optical system target surface is small, focal length is short, it is impossible to met
High altitude surveillance optoelectronic device should have the remote requirement of high-resolution, operating distance on optical system.Such as：Application No.
A kind of airborne zoom lens is disclosed in 201310723247.1 Chinese patent application file, the resolution ratio of the camera lens is suitable
Assigned in 1/3 inch of CCD, design target surface is small, it is impossible to full HD Camera Match；Moreover, the focal length of the camera lens is 10.5mm
~300mm, whole focal length is shorter, and the spy, recognition capability to distant object are limited, it is impossible to suitable for the airborne of high-altitude flight
Electro-optical system, so, its application has very big limitation.
The content of the invention
It is an object of the invention to provide a kind of big target surface continuous zooming optical system, to solve existing system target surface it is small,
Resolution ratio is low, it is impossible to the problem of can not being matched with high definition CCD or cmos camera.
To achieve the above object, the solution of the present invention includes a kind of big target surface continuous zooming optical system, including focal power
It is that negative zoom group, focal power are negative compensation group and focal power is positive latter fixed group for positive first fixed group, focal power；It is logical
The relative motion of zoom group and compensation group is crossed to realize the zoom of optical system；Fixed group is made up of four lens before described, is become
Times group is made up of three lens：First Zoom lens, the second Zoom lens and the 3rd Zoom lens, compensation group is by two lens groups
Into：First offset lens and the second offset lens, rear fixed group are made up of seven lens：Lens are fixed after first to the 7th；Institute
State the second Zoom lens and the 3rd Zoom lens constitute the second balsaming lens group, first offset lens and the second offset lens
The 3rd balsaming lens group is constituted, the light path between the compensation group and rear fixed group is provided with diaphragm, the preceding fixed group
Lens are fixed before first for negative lens of the concave surface to diaphragm, lens are fixed before second for positive lens of the concave surface to diaphragm, before the 3rd
Lens are fixed for positive lens of the concave surface to diaphragm, lens are fixed before the 4th for positive lens of the concave surface to diaphragm, it is solid before described first
Fixed lens group is into the first balsaming lens group before fix-focus lens and second；First Zoom lens are double-concave negative lens, and second becomes
Times lens are double-concave negative lens, and the 3rd Zoom lens are biconvex positive lens；First offset lens is double-concave negative lens, second
Offset lens is negative lens of the concave surface to diaphragm；Lens are fixed after described first to the 7th and are followed successively by convex surface to the just saturating of diaphragm
Mirror, convex surface are to the positive lens of diaphragm, biconvex positive lens, double-concave negative lens, convex surface to the positive lens of diaphragm, convex surface to the negative of diaphragm
Lens and concave surface are fixed after the 3rd and fixed lens group are fixed after lens and the 5th after lens, the 4th into the positive lens of diaphragm
Four balsaming lens groups.
The technical indicator of the optical system is：Optical system F#：5.6；Focal length：35mm~700mm；Target surface size is 1
Inch, applied to pixel count be 1920 × 1080, CCD or CMOS that Pixel size is 7.4 μm, target surface is 1 inch when, visual field is
26.56 °~1.35 °；Applied to pixel count be 1920 × 1080, the CCD that Pixel size is 5.5 μm, target surface is 2/3 inch or
During CMOS, visual field is 19.64 °~0.99 °.
Airspace before described between fixed group and zoom group is 10mm~147.82mm, between zoom group and compensation group
At intervals of 6mm~95.17mm, between compensation group and rear fixed group at intervals of 3mm~126.88mm.
The interval that lens are fixed before the first balsaming lens group and the 3rd is 0.2mm, and lens and the 4th are fixed before the 3rd
Between preceding fixed lens at intervals of 0.2mm；Between first Zoom lens and the second balsaming lens group at intervals of 10mm.
In four lens before described in fixed group, the optical material of at least one lens for H-FK61, H-FK71 or
GaF2。
The material of four lens before described in fixed group is respectively：H-ZF52, H-FK61, H-FK61 and H-ZLaF75A,
The material of three lens in the zoom group is respectively：In H-ZLaF4LA, H-ZK9A and H-ZLaF75A, the compensation group
The material of two lens is respectively：H-ZK9A and H-ZLaF75A, it is described after the materials of seven lens in fixed group be respectively：
BaF2, H-ZLaF75A, H-FK61, H-ZLaF4LA, H-BaF8, H-ZLaF4LA and ZF13.
It is additionally provided with the optical system after the first speculum and the second speculum for light path of turning back, the 6th fixed saturating
Fixed after injecting the 7th after the reflection that the emergent ray of mirror passes through the first speculum in lens, the direction of propagation of light changes 90 degree；
Projected after the reflection that the emergent ray that lens are fixed after 7th passes through the second speculum, the direction of propagation of light changes 90 degree again；
By the effect of the first speculum and the second speculum, the emergent ray of lens and the reflection through the second speculum are fixed after the 6th
Angle between the light projected afterwards is 180 degree.
Fixed after first fixed after lens and second between lens at intervals of 7.44mm, fix lens and the 4th after second
Between balsaming lens group at intervals of 0.15mm, fixed after the 4th balsaming lens group and the 6th between lens at intervals of
0.15mm, fix after the 6th between lens and the first speculum at intervals of 15mm, fix lens after the first speculum and the 7th
Between at intervals of 45mm, fixed after the 7th between lens and the second speculum at intervals of 40mm.
The present invention offer continuous zooming optical system, its target surface be 1 inch, it is adaptable to pixel count be 1920 ×
1080th, the high definition CCD or CMOS that Pixel size is 7.4 μm, target surface is 1 inch, is also applied for Pixel size for 5.5 μm, target surface
For 2/3 inch of high definition CCD or CMOS.And the focal length of the optical system is 35mm~700mm, the spy to distant object
Survey, recognition capability is correspondingly greatly improved, and then improve identification, the tracking of scouting, striking device to distant object
Ability, can be applied to the airborne lidar for fluorescence of high-altitude flight, and its application is very broad.
Brief description of the drawings
Fig. 1 is the structural representation of big target surface continuous zooming optical system；
Fig. 2 is the structural representation of the optical system under short focus state；
Fig. 3 is the structural representation of the optical system under middle coke-like state；
Fig. 4 is the structural representation of the optical system under focal length state；
Fig. 5 is optical system under short focus state in spatial frequency 90lp/mm transmission function figures；
Fig. 6 is optical system under middle coke-like state in spatial frequency 90lp/mm transmission function figures；
Fig. 7 is optical system under focal length state in spatial frequency 90lp/mm transmission function figures；
Fig. 8 is the optical system curvature of field, distortion figure under short focus state；
Fig. 9 is the optical system curvature of field, distortion figure under middle coke-like state；
Figure 10 is the optical system curvature of field, distortion figure under focal length state.
Embodiment
The present invention will be further described in detail below in conjunction with the accompanying drawings.
Big target surface continuous zooming optical system as shown in Figure 1, light is incided in the optical system by object space, along light
The line direction of propagation, it is that the positive preceding fixed G1, focal power of organizing is negative zoom group G2, light focus that the optical system includes focal power successively
Degree is negative compensation group G3 and focal power is positive rear fixed group G4.Light path between compensation group G3 and rear fixed group G4 is provided with
Diaphragm ST.
First fixed group is made up of four lens, is respectively：Lens are fixed before first for negative lens 11 of the concave surface to diaphragm, the
Lens are fixed before two for positive lens 12 of the concave surface to diaphragm, lens are fixed before the 3rd for positive lens 13 of the concave surface to diaphragm, the 4th
Preceding fixed lens are positive lens 14 of the concave surface to diaphragm, wherein, negative lens 11 constitutes the first balsaming lens group with positive lens 12；Become
Times group is made up of three lens, is respectively：First Zoom lens are double-concave negative lens 21, and the second Zoom lens are double-concave negative lens
22, the 3rd Zoom lens are biconvex positive lens 23, wherein, negative lens 22 and positive lens 23 constitute the second balsaming lens group；Compensation
Group is made up of two lens, is respectively：First offset lens is double-concave negative lens 31, and the second offset lens is concave surface to diaphragm
Negative lens 32, negative lens 31 and negative lens 32 constitute the 3rd balsaming lens group；Group is fixed afterwards to be made up of seven lens, is respectively：
Lens are fixed after first to the 7th, and to be followed successively by convex surface just saturating to the positive lens 41 of diaphragm, convex surface to the positive lens 42 of diaphragm, biconvex
Mirror 43, double-concave negative lens 44, convex surface are to the positive lens 45 of diaphragm, convex surface to the negative lens 46 and concave surface of diaphragm to the just saturating of diaphragm
Mirror 47, wherein, positive lens 43, negative lens 44, positive lens 45 constitute the 4th balsaming lens group.
In the present embodiment：
The optical system realize technical indicator be：
Wave band：Visible light wave range；Target surface：1 inch；F#：5.6；Focal length：F '=35mm~700mm；Visual field：Applied to picture
Prime number be 1920 × 1080, CCD or CMOS that Pixel size is 7.4 μm, target surface is 1 inch when, visual field be 26.56 °~
1.35°；Applied to pixel count be 1920 × 1080, CCD or CMOS that Pixel size is 5.5 μm, target surface is 2/3 inch when, depending on
Field is 19.64 °~0.99 °.
Airspace between preceding fixed group G1 and zoom group G2 is 10mm~147.82mm, zoom group G2 and compensation group G3
Between at intervals of 6mm~95.17mm, between compensation group G3 and rear fixed group G4 at intervals of 3mm~126.88mm.
In preceding fixed group G1, the first balsaming lens group and the interval of positive lens 13 are 0.2mm, positive lens 13 and positive lens
Between 14 at intervals of 0.2mm.
In zoom group G2, between the balsaming lens group of negative lens 21 and second at intervals of 10mm.
Speculum 51 and speculum 52 are additionally provided with the optical system, speculum 51 is arranged on negative lens 46 and positive lens 47
Between, fixed after injecting the 7th after the reflection that the light of the outgoing of negative lens 46 passes through speculum 51 in lens, the direction of propagation of light
Change 90 degree；The emergent ray of positive lens 47 is imaged onto in detector after the reflection by speculum 52, and the direction of propagation of light is again
It is secondary to change 90 degree；Pass through the effect of speculum 51 and speculum 52, the reflection of the emergent ray of negative lens 46 and reflected mirror 52
The angle between emergent ray afterwards is 180 degree, that is to say, that both direction contrasts.Two speculums are set, can be contracted
Short system length, it is ensured that system can also realize corresponding function under shorter length, also ensure that moreover, shortening length
The convenience that system is installed.
In rear fixed group G4, between positive lens 41 and positive lens 42 at intervals of 7.44mm；The glue of positive lens 42 and the 4th
Close lens group between at intervals of 0.15mm；Between 4th balsaming lens group and negative lens 46 at intervals of 0.15mm；Negative lens
Between 46 and speculum 51 at intervals of 15mm；Between speculum 51 and positive lens 47 at intervals of 45mm；Positive lens 47 with it is anti-
Penetrate between mirror 52 at intervals of 40mm.
The various aberrations of focal length are corrected using first fixed group, 14 liang of positive lens 13 and positive lens are added in first fixed group
Individual dialyte lens, focal length end aberration correction is carried out using the size of airspace and the difference of radius.Moreover, in first fixed group
In four lens, at least one lens selects the optical material of the EDs such as H-FK61, H-FK71 or GaF2, for reducing
The aberrations such as the second order spectrum at optical system focal length end.As specific embodiment, in the present embodiment, all lens in the optical system
All surface shape be sphere, without aspherical lens, easy processing manufacture, cost is low.And the material in system used in lens
Material is home made materials, is specially：The material of four lens in first fixed group is respectively：H-ZF52, H-FK61, H-FK61 and
The material of three lens in H-ZLaF75A, zoom group is respectively：In H-ZLaF4LA, H-ZK9A and H-ZLaF75A, compensation group
The materials of two lens be respectively：The material of seven lens in H-ZK9A and H-ZLaF75A, fixed group is respectively：BaF2、
H-ZLaF75A, H-FK61, H-ZLaF4LA, H-BaF8, H-ZLaF4LA and ZF13.
In the case of the basic configuration and range of movement of lens in keeping existing structure, the surface curvature of each lens is
There can be multigroup solution, such as：The preceding surface of lens 11 is 270.55, it is also possible to be 270.65, simply if
270.65 follow-up surface curvatures also have corresponding adjustment, so the surface curvature radius of each lens is not only to determine
A value, table 1 gives the value of one group of specific surface curvature.Table 1 gives one group of the optical system, and other are specific
Parameter.
Table 1
Optical system realizes zoom, when being when carrying out focal length variations by the relative movement of zoom group and compensation group
System from short focus to focal length change when, zoom group and compensation group are moved backward together relative to fixed group, again by difference between two groups
The characteristics of motion relatively move to compensate the movement of image planes, reach and keep the stable effect of image planes completely.Use the optical system
During system, because target being observed distance can change, this will cause optical system defocus, so needing to the optical system
Focused, take the mode of the lens in mobile preceding fixed group to realize the focusing of optical system, image planes is adjusted to detector
Focal plane position.As shown in Fig. 2,3 and 4, Fig. 2 is the optical system under short focus state, and Fig. 3 is the optical system under middle coke-like state
System, Fig. 4 is the optical system under focal length state.
Fig. 5 is optical system under short focus state in spatial frequency 90lp/mm transmission function figures；Under Fig. 6 is middle coke-like state
Optical system in spatial frequency 90lp/mm transmission function figures；Fig. 7 is optical system under focal length state in spatial frequency
90lp/mm transmission function figures；Fig. 8 is the optical system curvature of field, distortion figure under short focus state；Fig. 9 is the optics under middle coke-like state
The system curvature of field, distortion figure；Figure 10 is the optical system curvature of field, distortion figure under focal length state.
It is that, in order to shorten the length of system, speculum only changes the direction of propagation of light using speculum in above-described embodiment,
Do not introduce aberration.Certainly, if not required for the length of system, the speculum can also be not provided with.
In addition, the content being not described in specification belongs in the application documents being disclosed in background technology
Either well known to a person skilled in the art prior art for technical characteristic.
Specific embodiment is presented above, but the present invention is not limited to described embodiment.The base of the present invention
This thinking is above-mentioned basic scheme, for those of ordinary skill in the art, according to the teachings of the present invention, designs various changes
The model of shape, formula, parameter simultaneously need not spend creative work.It is right without departing from the principles and spirit of the present invention
The change, modification, replacement and modification that embodiment is carried out are still fallen within protection scope of the present invention.
Claims (5)
1. a kind of big target surface continuous zooming optical system, including focal power be positive first fixed group, focal power be negative zoom group,
Focal power is negative compensation group and focal power is positive latter fixed group；Light is realized by the relative motion of zoom group and compensation group
The zoom of system；Fixed group is made up of four lens before described, and zoom group is made up of three lens：First Zoom lens,
Two Zoom lens and the 3rd Zoom lens, compensation group are made up of two lens：First offset lens and the second offset lens, it is rear solid
Determine group to be made up of seven lens：Lens are fixed after first to the 7th；Second Zoom lens and the 3rd Zoom lens composition the
Two balsaming lens groups, first offset lens and the second offset lens constitute the 3rd balsaming lens group, it is characterised in that described
Light path between compensation group and rear fixed group is provided with diaphragm, it is described before in fixed group first before to fix lens be concave surface to light
The negative lens of door screen, lens are fixed before second for positive lens of the concave surface to diaphragm, fixed before the 3rd lens for concave surface to diaphragm just
Lens, lens are fixed before the 4th for positive lens of the concave surface to diaphragm, fixed lens group before lens and second is fixed before described first
Into the first balsaming lens group；First Zoom lens are double-concave negative lens, and the second Zoom lens are double-concave negative lens, and the 3rd becomes
Times lens are biconvex positive lens；First offset lens is double-concave negative lens, and the second offset lens is concave surface bearing to diaphragm
Lens；Lens are fixed after described first to the 7th and are followed successively by positive lens of the convex surface to the positive lens, convex surface of diaphragm to diaphragm, biconvex
Positive lens, double-concave negative lens, convex surface to the positive lens of diaphragm, negative lens from convex surface to diaphragm and positive lens from concave surface to diaphragm,
Fixed after 3rd and fixed lens group is fixed after lens and the 5th after lens, the 4th into the 4th balsaming lens group；The optical system
In be additionally provided with the first speculum and the second speculum for light path of turning back, the 6th after fix the emergent ray of lens by first
Fixed after injecting the 7th after the reflection of speculum in lens, the direction of propagation of light changes 90 degree；The outgoing of lens is fixed after 7th
Projected after the reflection that light passes through the second speculum, the direction of propagation of light changes 90 degree again；Pass through the first speculum and second
The effect of speculum, the angle for fixing the emergent ray of lens after the 6th between the light that is projected after the reflection of the second speculum
Spend for 180 degree；Fixed after first fixed after lens and second between lens at intervals of 7.44mm, fix lens and after second
Between four balsaming lens groups at intervals of 0.15mm, fixed after the 4th balsaming lens group and the 6th between lens at intervals of
0.15mm, fix after the 6th between lens and the first speculum at intervals of 15mm, fix lens after the first speculum and the 7th
Between at intervals of 45mm, fixed after the 7th between lens and the second speculum at intervals of 40mm.
2. big target surface continuous zooming optical system according to claim 1, it is characterised in that the technology of the optical system
Index is：Optical system F#：5.6；Focal length：35mm~700mm；Target surface size be 1 inch, applied to pixel count be 1920 ×
During CCD or CMOS that the 1080, Pixel size is 7.4 μm, target surface is 1 inch, visual field is 26.56 °~1.35 °；Applied to pixel
Number is 1920 × 1080, CCD or CMOS that Pixel size is 5.5 μm, target surface is 2/3 inch when, visual field is 19.64 °~
0.99°。
3. big target surface continuous zooming optical system according to claim 1, it is characterised in that fixed group and zoom before described
Airspace between group is 10mm~147.82mm, between zoom group and compensation group at intervals of 6mm~95.17mm, compensation
Between group and rear fixed group at intervals of 3mm~126.88mm.
4. big target surface continuous zooming optical system according to claim 1, it is characterised in that four fixed before described in group
In individual lens, the optical material of at least one lens is H-FK61, H-FK71 or GaF2.
5. big target surface continuous zooming optical system according to claim 4, it is characterised in that four fixed before described in group
The material of individual lens is respectively：The material of three lens in H-ZF52, H-FK61, H-FK61 and H-ZLaF75A, the zoom group
Material be respectively：The material of two lens in H-ZLaF4LA, H-ZK9A and H-ZLaF75A, the compensation group is respectively：H-
ZK9A and H-ZLaF75A, it is described after the materials of seven lens in fixed group be respectively：BaF2、H-ZLaF75A、H-FK61、H-
ZLaF4LA, H-BaF8, H-ZLaF4LA and ZF13.
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| CN201510481734.0A CN105044891B (en) | 2015-08-03 | 2015-08-03 | A kind of big target surface continuous zooming optical system |
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| CN111766703B (en) * | 2020-07-14 | 2022-07-01 | 孝感华中精密仪器有限公司 | Modeling method of optical system of video camera and recorder all-in-one machine based on image space scanning |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5579172A (en) * | 1993-07-19 | 1996-11-26 | Nikon Corporation | Zoom lens system |
| CN101930114A (en) * | 2010-08-25 | 2010-12-29 | 福建福光数码科技有限公司 | Varifocal pick-up lens with high resolution and strong fog penetrating function |
| CN102608732A (en) * | 2011-12-22 | 2012-07-25 | 福建福光数码科技有限公司 | Large-view-field high-resolution high-rate vehicle-mounted zoom pick-up lens |
| CN203502659U (en) * | 2013-08-22 | 2014-03-26 | 福建福光数码科技有限公司 | High-resolution long-focus automatic-focusing and automatic-dimming airborne zoom camera lens |
| CN204945480U (en) * | 2015-08-03 | 2016-01-06 | 凯迈（洛阳）测控有限公司 | Large target surface continuous zooming optical system |
-
2015
- 2015-08-03 CN CN201510481734.0A patent/CN105044891B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5579172A (en) * | 1993-07-19 | 1996-11-26 | Nikon Corporation | Zoom lens system |
| CN101930114A (en) * | 2010-08-25 | 2010-12-29 | 福建福光数码科技有限公司 | Varifocal pick-up lens with high resolution and strong fog penetrating function |
| CN102608732A (en) * | 2011-12-22 | 2012-07-25 | 福建福光数码科技有限公司 | Large-view-field high-resolution high-rate vehicle-mounted zoom pick-up lens |
| CN203502659U (en) * | 2013-08-22 | 2014-03-26 | 福建福光数码科技有限公司 | High-resolution long-focus automatic-focusing and automatic-dimming airborne zoom camera lens |
| CN204945480U (en) * | 2015-08-03 | 2016-01-06 | 凯迈（洛阳）测控有限公司 | Large target surface continuous zooming optical system |
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