CN105334602B - A kind of long wavelength's alignment scans three visual field infrared optical systems - Google Patents
A kind of long wavelength's alignment scans three visual field infrared optical systems Download PDFInfo
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- CN105334602B CN105334602B CN201510901261.5A CN201510901261A CN105334602B CN 105334602 B CN105334602 B CN 105334602B CN 201510901261 A CN201510901261 A CN 201510901261A CN 105334602 B CN105334602 B CN 105334602B
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B15/00—Optical objectives with means for varying the magnification
- G02B15/02—Optical objectives with means for varying the magnification by changing, adding, or subtracting a part of the objective, e.g. convertible objective
- G02B15/04—Optical objectives with means for varying the magnification by changing, adding, or subtracting a part of the objective, e.g. convertible objective by changing a part
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Abstract
The present invention relates to a kind of long wavelength's alignment to scan three visual field infrared optical systems, including set gradually from the object side to the image side with optical axis telephotolens group, be converged to as group and detector, telephotolens group includes preceding fixed lens, zoom group and fixes microscope group afterwards, wherein, zoom group is made up of big visual field zoom group and middle visual field zoom group zoom group, when big visual field zoom group puts into optical system and middle visual field zoom group is cut out from optical system, the optical system is large visual field optical system；Central visual field zoom group puts into optical system and big visual field zoom group is cut out from optical system, and the optical system is middle visual field optical system；When big visual field zoom group and middle visual field zoom group are cut out from optical system, the optical system is to neglect field optical system.The optical system can realize that the switched scan between big visual field, middle visual field and small field of view is imaged by putting into and cutting out corresponding zoom microscope group, realize the random switching of three visual fields.
Description
Technical field
The present invention relates to a kind of long wavelength's alignment to scan three visual field infrared optical systems.
Background technology
Infrared imaging system with the good characteristics of its own, such as passive working method, not by electronic interferences, good concealment,
Image is directly perceived, precision is high, detection performance is good etc., extensive in airborne photoelectric radar, scouting/targeting pod, distributed infrared system
Using.In other military domains, for example new infrared technique equipment is each equipped with battlebus, naval vessel, individual soldier etc.；Product bag
The infrared what comes into a driver's strengthening system of civil aircraft, passenger plane anti-terrorism attack IR threats warning system, forest fire protection IRDS etc. are included,
It is respectively provided with terms of civil aviation and is widely applied market.With infrared optics technology tremendous development and its application not
Disconnected extension, increasingly strengthens the more visual fields of infrared optical system, wide visual field imaging demand, and how research makes infrared optical system high score
Imaging and the panorama imaging at a distance of the more visual fields of resolution, the research tool to military infrared optics instrument are of great significance.But
It is that the optical system being imaged at a distance on the more visual fields of high-resolution in the prior art is seldom.
The content of the invention
It is an object of the invention to provide a kind of long wavelength's alignment to scan three visual field infrared optical systems.
To achieve the above object, the solution of the present invention includes a kind of long wavelength's alignment three visual field infrared optical systems of scanning,
Including set gradually from the object side to the image side with optical axis telephotolens group, be converged to as group and detector, telephotolens group includes
Preceding fixed lens, zoom group and afterwards fix microscope group, wherein, zoom group is by big visual field zoom group and middle visual field zoom group zoom group structure
Into the big visual field zoom group is made up of the second lens and the 5th lens, and the middle visual field zoom group is by the 3rd lens and the 4th
Lens are formed, and set gradually second lens, the 3rd lens, the 4th lens and the 5th lens from the object side to the image side；Regarded when greatly
Field zoom group puts into the optical system and middle visual field zoom group is cut out from the optical system, and the optical system is big
Visual field optical system；Central visual field zoom group puts into the optical system and big visual field zoom group is from the optical system
Cut out, the optical system is middle visual field optical system；When big visual field zoom group and middle visual field zoom group are from the optical system
In cut out, the optical system is neglects field optical system；
The design objective of the optical system is：Wavelength is 7.7 μm~10.3 μm；Pixel dimension is：20μm×24μm；F# is
2；During focal length=500mm, the angle of visual field is 2.82 ° × 2.11 °；During focal length=300mm, the angle of visual field is 4.69 ° × 3.52 °；Focal length
During=100mm, the angle of visual field is 14.04 ° × 10.53 °.
Total focal power of the optical system meets below equation：
Wherein,For i-th of power of lens, hiFor height of incidence of the paraxial rays on i-th of lens,To be
Total focal power of system；
The total color difference coefficient of the optical system meets below equation：
Wherein：CiFor the chromatic aberration coefficient of i-th of lens, CtotalFor the total color difference coefficient of the optical system.
Fixed lens be the first lens before described, after described fixed microscope group including set gradually with optical axis the 6th lens,
7th lens, the 8th lens and the 9th lens, it is described be converged to as group include set gradually with optical axis the tenth lens, the 11st
Lens, the 12nd lens and the 13rd lens, first lens are positive power lens, and the second lens are that negative power is saturating
Mirror, the 3rd lens are negative-power lenses, and the 4th lens are positive power lens, and the 5th lens are positive power lens, the 6th
Lens are negative-power lenses, and the 7th lens are negative-power lenses, and the 8th lens are negative-power lenses, and the 9th lens is just
Power lenses, the tenth lens are positive power lens, and the 11st lens are negative-power lenses, and the 12nd lens are positive light focus
Lens are spent, the 13rd lens are positive power lens.
It is provided with the first speculum between 6th lens and the 7th lens, the light that the 6th lens project is through the
It is injected into after the reflection of one speculum in the 7th lens；Microscope group is fixed after described and is converged to anti-as being provided with second between group
Mirror is penetrated, the light that fixed microscope group projects after described is injected into described be converged to as in group after the reflection of the second speculum.
The surface of close image space in second lens is aspherical, and the surface of the close image space in the 5th lens is non-
Sphere, two surfaces in the 7th lens are aspherical, and two surfaces of the 9th lens are aspherical, in the tenth lens
It is aspherical close to the surface of object space, the surface of the close image space in the 11st lens is aspherical, leaning in the 13rd lens
The surface of nearly object space is aspherical.
First lens, the second lens, the 3rd lens, the 4th lens, the 5th lens, the 7th lens, the 9th lens,
Ten lens, the 11st lens, the material of the 12nd lens and the 13rd lens are germanium, and the material of the 6th lens and the 8th lens is
Zinc selenide.
The optical system is arranged in a lens barrel, and the material of the lens barrel is aluminium alloy.
Aperture diaphragm of the optical system using the cold light diaphragm of detector as the optical system.
Optical system provided by the invention by zoom mirror corresponding to putting into and cutting out can realize big visual field, middle visual field and
Switched scan imaging between small field of view, can realize the random switching of three visual fields, and apply also for panorama imaging.Entirely
For optical system in -40 DEG C~+60 DEG C of super-wide temperature range, transmission function is remained above 0.4.The optical system has higher point
Resolution, remote imaging can be realized, the research tool to military infrared optics instrument is of great significance.
Brief description of the drawings
Fig. 1 is the structural representation that long wavelength's alignment scans three visual field infrared optical systems.
Embodiment
The present invention will be further described in detail below in conjunction with the accompanying drawings.
Long wavelength's alignment provided by the invention scans three visual field infrared optical systems and is divided into three parts on the whole, from object space to
Image space is followed successively by telephotolens group with optical axis, is converged to as group and detector.Wherein, telephotolens group include preceding fixed lens,
Zoom group and rear fixed microscope group, moreover, zoom group is made up of big visual field zoom group and middle visual field zoom group zoom group.Such as Fig. 1 institutes
Show, big visual field zoom group is made up of lens 2 and lens 5, and middle visual field zoom group is made up of lens 3 and lens 4, lens 2, lens 3,
Lens 4 and lens 5 put in order for：Lens 2, lens 3, lens 4 and lens 5 are followed successively by from the object side to the image side.
The optical system realizes three visual fields by putting into and cutting out corresponding zoom group：Big visual field, middle visual field and small
Switching between visual field, it is specially：When big visual field zoom group puts into the optical system and middle visual field zoom group is from optical system
In cut out, i.e., light caused by object space through lens 2 and lens 5 and travels to follow-up rear fixed microscope group and is converged to as group,
Until reaching detector, and the imaging of lens 3 and lens 4 for the optical system does not contribute, equivalent to by the He of lens 3
Lens 4 are excluded outside the optical system, and now the optical system is large visual field optical system；Similarly, central visual field zoom group
Put into optical system and big visual field zoom group is cut out from optical system, the optical system is middle visual field optical system.Separately
Outside, when big visual field zoom group and middle visual field zoom group are cut out from optical system, i.e. lens 2, lens 3, lens 4 and lens 5
When excluding outside the optical system, the optical system is to neglect field optical system.Put into and cut by above-mentioned two zoom group
Go out the optical system, the switching of three visual fields can be realized.
The input of microscope group and the conventional method cut out have two kinds：Using motor or manually put into and cut out, made
When being operated with motor, motor driven microscope group carries out motion and realizes input and cut out, such as：Microscope group is rotated by motor and thrown
Enter or cut out system, belong to routine techniques because motor driven microscope group carries out motion, do not repeat here；Carried out using artificial
During operation, only need that microscope group is manually put into and cut out from system as needed.
The design objective of the optical system is：Wavelength is 7.7 μm~10.3 μm；Pixel dimension is：20μm×24μm；F# is
2；During focal length=500mm, the angle of visual field is 2.82 ° × 2.11 °；During focal length=300mm, the angle of visual field is 4.69 ° × 3.52 °；Focal length
During=100mm, the angle of visual field is 14.04 ° × 10.53 °.In addition, in order to match the optical system, detector is 1024 × 6TDI telluriums
Cadmium mercury alignment.
Each power of lens distribution in the optical system needs the requirement for meeting total focal power, the optical system
Total focal power meets below equation：
Wherein,For i-th of power of lens, hiFor height of incidence of the paraxial rays on i-th of lens,For
Total focal power of system.
The total color difference coefficient of the optical system also needs to meet below equation：
Wherein：CiFor the chromatic aberration coefficient of i-th of lens, CtotalFor the total color difference coefficient of the optical system.
The focal power distribution condition of system can be obtained by solving above-mentioned equation, recycles CODEV softwares further excellent
Change design.By the principle of Step wise approximation, under conditions of control aberration, thermal imagery constraint, the optimized variable of each lens is discharged, together
When introduce aspherical, analysis and optimization intermediate structure repeatedly, directly obtain it is gratifying, meet design objective and performance requirement
Optical system.
Meet it is above-mentioned it is each under the conditions of, this gives the optical system a concrete structure.Such as Fig. 1 institutes
Showing, preceding fixed lens are lens 1, and rear fixed microscope group includes lens 6, lens 8, lens 9 and the lens 10 set gradually with optical axis,
It is converged to as organizing the lens 12, lens 13, lens 14 and the lens 15 that include setting gradually with optical axis.Wherein, lens 1 are positive light focus
Lens are spent, lens 2 are negative-power lenses, and lens 3 are negative-power lenses, and lens 4 are positive power lens, and lens 5 is just
Power lenses, lens 6 are negative-power lenses, and lens 8 are negative-power lenses, and lens 9 are negative-power lenses, lens 10
For positive power lens, lens 12 are positive power lens, and lens 13 are negative-power lenses, and lens 14 are that positive light coke is saturating
Mirror, lens 15 are positive power lens.
The surface of close image space in lens 2 is aspherical, and the surface of the close image space in lens 5 is aspherical, lens 8
In two surfaces be aspherical, two surfaces of lens 10 are aspherical, and the surface of the close object space in lens 12 is
Aspherical, the surface of the close image space in lens 13 is aspherical, and the surface of the close object space in lens 15 is aspherical.
Lens 1, lens 2, lens 3, lens 4, lens 5, lens 8, lens 10, lens 12, lens 13, lens 14 and lens
15 material is germanium, and the material of lens 6 and lens 9 is zinc selenide.Moreover, the optical system can also be arranged on a lens barrel
Interior, the material of the lens barrel is aluminium alloy, lighter weight, is easily installed and carries.
Aperture diaphragm of the optical system using the cold light diaphragm of detector as the optical system, optical system is used as by the use of cold stop
The aperture diaphragm of system, cold stop efficiency 100%, it is possible to achieve do not disturbed by veiling glare outside system.
In addition, in order to shorten the overall axial length of the optical system, speculum is provided between lens 6 and lens 8
7, the light that lens 6 project is injected into lens 8 after the reflection of speculum 7；Microscope group is fixed afterwards and is converged to as being set between group
There is speculum 11, the light that the lens 10 in rear fixed microscope group project is injected into after the reflection of speculum 11 to be converged to as in group
In lens 12.
Table 1 is the parameter of the optical system each part under small field of view, and table 2 is the parameter of lens 2 and lens 5,
Table 3 is the parameter of lens 3 and lens 4, wherein, the content of table 1 plus the content of table 2 form the optical system under middle visual field it is each
The parameter of individual part；The content of table 1 forms the optical system each part under big visual field plus the content of table 3
Parameter.
Table 1
Table 2
Table 3
The optical system utilizes non-spherical lens, by increasing capacitance it is possible to increase the free degree during Optical System Design, coordinates correction
Coma, spherical aberration, the astigmatism of system, greatly improve as matter.Moreover, the optical system can realize that three visual field switched scans are imaged,
And it can be applied to panorama imaging.Optical system uses two kinds of infrared optical materials：Germanium and zinc selenide are matched, passive athermal
Germanium, selenizing Zinc material is used only in the material fit of optical system, makes three visual fields of optical system in temperature range -40 DEG C~+60
DEG C high quality imaging is kept, transmission function is remained above 0.4.In addition, the optical system can be applied to the imaging of alignment sweeping, also may be used
The scanning work pattern such as to sweep applied to week.
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 (7)
1. a kind of long wavelength's alignment scans three visual field infrared optical systems, it is characterised in that including same optical axis from the object side to the image side
The telephotolens group that sets gradually, it is converged to as group and detector, telephotolens group includes preceding fixed lens, zoom group and rear solid
Horizontal glass group, wherein, zoom group is made up of big visual field zoom group and middle visual field zoom group, and the big visual field zoom group is by the second lens
Formed with the 5th lens, the middle visual field zoom group is made up of the 3rd lens and the 4th lens, set gradually from the object side to the image side
Second lens, the 3rd lens, the 4th lens and the 5th lens；When big visual field zoom group put into the optical system and
Middle visual field zoom group is cut out from the optical system, and the optical system is large visual field optical system；Central visual field zoom group is thrown
Enter to the optical system and big visual field zoom group and cut out from the optical system, the optical system is middle visual field optical system
System；When big visual field zoom group and middle visual field zoom group are cut out from the optical system, the optical system is to neglect field optics
System；
The design objective of the optical system is：Wavelength is 7.7 μm~10.3 μm；Pixel dimension is：20μm×24μm；F numbers are 2；
During focal length=500mm, the angle of visual field is 2.82 ° × 2.11 °；During focal length=300mm, the angle of visual field is 4.69 ° × 3.52 °；Focal length=
During 100mm, the angle of visual field is 14.04 ° × 10.53 °；
Total focal power of the optical system meets below equation：
Wherein,For i-th of power of lens, hiFor height of incidence of the paraxial rays on i-th of lens,For system
Total focal power, k are the total number of lens；
The total color difference coefficient of the optical system meets below equation：
Wherein：CiFor the chromatic aberration coefficient of i-th of lens, CtotalFor the total color difference coefficient of the optical system；K is total of lens
Number.
2. long wavelength's alignment according to claim 1 scans three visual field infrared optical systems, it is characterised in that solid before described
Fix-focus lens is the first lens, and fixed microscope group includes the 6th lens, the 7th lens, the 8th lens set gradually with optical axis after described
With the 9th lens, it is described be converged to as group include set gradually with optical axis the tenth lens, the 11st lens, the 12nd lens and
13rd lens, first lens are positive power lens, and the second lens are negative-power lenses, and the 3rd lens are negative light focus
Lens are spent, the 4th lens are positive power lens, and the 5th lens are positive power lens, and the 6th lens are negative-power lenses,
7th lens are negative-power lenses, and the 8th lens are negative-power lenses, and the 9th lens are positive power lens, the tenth lens
For positive power lens, the 11st lens are negative-power lenses, and the 12nd lens are positive power lens, and the 13rd lens are
Positive power lens.
3. long wavelength's alignment according to claim 2 scans three visual field infrared optical systems, it is characterised in that the described 6th
The first speculum is provided between lens and the 7th lens, the light that the 6th lens project is penetrated after the reflection of the first speculum
Enter into the 7th lens；Microscope group is fixed after described and is converged to as being provided with the second speculum between group, it is fixed after described
The light that microscope group projects is injected into described be converged to as in group after the reflection of the second speculum.
4. long wavelength's alignment according to claim 2 scans three visual field infrared optical systems, it is characterised in that described second
The surface of close image space in lens is aspherical, and the surface of the close image space in the 5th lens is aspherical, in the 7th lens
Two surfaces be aspherical, two surfaces of the 9th lens are aspherical, the surface of the close object space in the tenth lens
To be aspherical, the surface of the close image space in the 11st lens is aspherical, and the surface of the close object space in the 13rd lens is
It is aspherical.
5. long wavelength's alignment according to claim 2 scans three visual field infrared optical systems, it is characterised in that described first
It is lens, the second lens, the 3rd lens, the 4th lens, the 5th lens, the 7th lens, the 9th lens, the tenth lens, the 11st saturating
The material of mirror, the 12nd lens and the 13rd lens is germanium, and the material of the 6th lens and the 8th lens is zinc selenide.
6. long wavelength's alignment according to claim 1 scans three visual field infrared optical systems, it is characterised in that the optics
System is arranged in a lens barrel, and the material of the lens barrel is aluminium alloy.
7. long wavelength's alignment according to claim 1 scans three visual field infrared optical systems, it is characterised in that the optical system
The aperture diaphragm united using the cold light diaphragm of detector as the optical system.
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106443993B (en) * | 2016-11-28 | 2019-06-21 | 中国航空工业集团公司洛阳电光设备研究所 | A kind of three visual field LONG WAVE INFRARED system of compact double light path |
| CN108121051A (en) * | 2016-11-30 | 2018-06-05 | 北京航天计量测试技术研究所 | One kind disappears veiling glare without thermalization double-view field switching infrared optical system |
| CN110780429B (en) * | 2019-10-21 | 2021-10-22 | 中国航空工业集团公司洛阳电光设备研究所 | double-L rotary three-view-field long-wave infrared system |
| CN113281887B (en) * | 2021-07-20 | 2021-11-12 | 西安微普光电技术有限公司 | Searching and tracking integrated infrared zoom lens and imaging method |
| CN115980986B (en) * | 2022-12-12 | 2024-03-22 | 之江实验室 | Zoom optical system, control method and control device of zoom optical system |
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| US5548439A (en) * | 1994-12-27 | 1996-08-20 | Hughes Aircraft Company | Three field of view refractive infrared telescope with fixed medium filed of view |
| CN104297908A (en) * | 2013-11-28 | 2015-01-21 | 中国航空工业集团公司洛阳电光设备研究所 | Medium-wave/long-wave double-color multi-field optical system |
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2015
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5548439A (en) * | 1994-12-27 | 1996-08-20 | Hughes Aircraft Company | Three field of view refractive infrared telescope with fixed medium filed of view |
| CN104297908A (en) * | 2013-11-28 | 2015-01-21 | 中国航空工业集团公司洛阳电光设备研究所 | Medium-wave/long-wave double-color multi-field optical system |
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