CN105223699B - A kind of visible light/infrared light two waveband optical system - Google Patents
A kind of visible light/infrared light two waveband optical system Download PDFInfo
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- CN105223699B CN105223699B CN201510626350.3A CN201510626350A CN105223699B CN 105223699 B CN105223699 B CN 105223699B CN 201510626350 A CN201510626350 A CN 201510626350A CN 105223699 B CN105223699 B CN 105223699B
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/10—Beam splitting or combining systems
- G02B27/1006—Beam splitting or combining systems for splitting or combining different wavelengths
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B15/00—Optical objectives with means for varying the magnification
- G02B15/14—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective
- G02B15/16—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective with interdependent non-linearly related movements between one lens or lens group, and another lens or lens group
- G02B15/163—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective with interdependent non-linearly related movements between one lens or lens group, and another lens or lens group having a first movable lens or lens group and a second movable lens or lens group, both in front of a fixed lens or lens group
- G02B15/167—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective with interdependent non-linearly related movements between one lens or lens group, and another lens or lens group having a first movable lens or lens group and a second movable lens or lens group, both in front of a fixed lens or lens group having an additional fixed front lens or group of lenses
- G02B15/17—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective with interdependent non-linearly related movements between one lens or lens group, and another lens or lens group having a first movable lens or lens group and a second movable lens or lens group, both in front of a fixed lens or lens group having an additional fixed front lens or group of lenses arranged +--
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B17/00—Systems with reflecting surfaces, with or without refracting elements
- G02B17/08—Catadioptric systems
Abstract
The present invention relates to a kind of visible light/infrared light two waveband optical system, including principal reflection mirror, secondary mirror, beam-splitter, visible channel subsystem and infrared channel subsystem.Wherein, secondary mirror can switch in and out from light path, and when secondary mirror is cut out, light respectively enters visible ray with being imaged in infrared channel subsystem after beam-splitter is divided, and now, the optical system is in the continuous vari-focus state of short focus；Secondary mirror is cut in light path when continuous vari-focus is in minimum visual field, light is through principal reflection mirror with respectively enteing visible ray with being imaged in infrared channel subsystem after being divided after secondary mirror by beam-splitter, now, system is in focal length and focuses state.The optical system is scanned for target using continuous vari-focus when can realize short focus using the pattern of the common light path rear end separate imaging of front end Shared aperture and focal length end is tracked to target, identifies and aimed at, can be realized long-focus, the miniaturization of system.
Description
Technical field
The present invention relates to a kind of visible light/infrared light two waveband optical system, belongs to continuous zooming optical equipment and technology neck
Domain.
Background technology
In industrial detection and national defense and military application field, in order to it is quick under different external environments, timely find target
And the real-time tracking to target and accurate measurement are realized, it should ask to obtain the visible images of target, it is also necessary to obtain target
Infrared image.With the development of society, the optical system of single wave band is increasingly difficult to meet actual use demand, multiband is very
It is developed rapidly to all band hybrid optical system, the optical system that multiband optical system and varifocal optical system are combined
System is widely applied because its observation scope is wide, measurement is accurate.Zoom system be a kind of focal length can consecutive variations, and picture
Face keeps stable, and as good optical system is held in quality guarantee in zooming procedure.Visible ray and the two waveband optics of infrared combination
Its visible luminous energy of system is received by human eye, and observation is convenient, and under night and poor light condition, and when having mist or blocking
Infrared system has good smog, a dust penetration capacity, affected by environment small without limiting round the clock, the advantages that good concealment.
Visible light wave range when observation condition is good, light intensity is weaker, night when observed with infrared light path, both are with the use of can be effective
Improve the speed and efficiency of tracking and measurement target.
Moreover, for high altitude surveillance or scouting the large-scale airborne platform of striking type, to improve target acquisition/identification energy
Power, it is desirable to which its optical system loaded has the characteristics that spatial resolution is high, operating distance is remote, identification probability is high.This is required should
Optical system has extremely long focal length, and long-focus means heavy caliber, at present both at home and abroad for visible ray varifocal optical system
Research with infrared zoom optical system relates to, but the two optical systems are individually designed, separation, when in use
Two optical systems are needed to realize required function, this can be caused, and system bulk is excessive, weight is too heavy, it is impossible to suitable for height
The large-scale airborne platform of striking type is scouted or scouted to sky.In order to overcome drawbacks described above, the China of Application No. 201310248836.9
A kind of two waveband Shared aperture light path co-variation Jiao's imaging optical system, including public zoom group portion altogether is disclosed in patent application document
Point, Amici prism, it is seen that group and group after infrared light after light, wherein, public zoom group part is public preceding fixed by what is set gradually
Group, public zoom group and public compensation group composition, by adjust public zoom group and public compensation group realize it is visible with it is infrared same
Step section, still, because the zoom ratio of visible light optical system and infrared optical system differs, this means that two wave band feelings
Observable distance, observation scope under condition differ, and also result in accurately not tracking and measuring sometimes the consequence of target.
The content of the invention
It is an object of the invention to provide a kind of visible light/infrared light two waveband optical system, to solve existing light altogether
The problem of road co-variation Jiao imaging optical system can not accurately track and measure target.
To achieve the above object, the solution of the present invention includes a kind of visible light/infrared light two waveband optical system, including divides
Tabula rasa, visible channel subsystem and infrared optical channel subsystem, the visible ray after beam-splitter light splitting input to described
Visible channel subsystem, the infrared light after beam-splitter light splitting input to the infrared optical channel subsystem；It is described can
See optical channel subsystem include the focal power that sequentially coaxially sets be fix group before positive first, focal power is the first negative zoom
Group, focal power are negative the first compensation group and focal power is that group is fixed after positive first, solid after the first compensation group and first
The light path determined between group is provided with the first diaphragm, realizes that this is visible by the relative motion of the first zoom group and the first compensation group
The zoom of optical channel subsystem；The first zoom group is made up of four lens, is followed successively by：First Zoom lens, the second zoom
Lens, the 3rd Zoom lens and the 4th Zoom lens, first Zoom lens are the negative meniscus for bending towards diaphragm, second
Zoom lens are biconvex positive lens, and the 3rd Zoom lens are double-concave negative lens, and the 4th Zoom lens are double-concave negative lens, described
Two Zoom lens and the 3rd Zoom lens form the second balsaming lens group；The first compensation group is made up of two lens, successively
For：First offset lens and the second offset lens, first offset lens are the falcate positive lens for bending towards diaphragm, and second mends
It is double-concave negative lens to repay lens；The focal power that the infrared optical channel subsystem includes sequentially coaxially setting is solid before being positive second
Determine group, focal power is the second negative zoom group, focal power is positive the second compensation group and focal power is to fix group after positive second,
The light path fixed after described second between group and image planes is provided with the second diaphragm, passes through the second zoom group and the second compensation group
Relative motion realize the zoom of the infrared optical channel subsystem.
Group is fixed before described first to be made up of four lens, is followed successively by：Fixed before first before lens, second fix lens,
Lens are fixed before lens and the 4th are fixed before 3rd, it is that the falcate for bending towards the diaphragm is born thoroughly that lens are fixed before described first
Mirror, it is biconvex positive lens to fix lens before second, and it is the falcate positive lens for bending towards diaphragm that lens are fixed before the 3rd, solid before the 4th
Fix-focus lens is the falcate positive lens for bending towards diaphragm, and fixed lens group is glued into first before lens and second are fixed before described first
Lens group；Group is fixed after described first to be made up of eight lens, is successively：Fix lens after first to the 8th, described first to
Lens are fixed after 8th and are followed successively by the falcate positive lens for bending towards diaphragm, biconvex positive lens, biconvex positive lens, double-concave negative lens,
Backwards to the falcate positive lens of diaphragm, backwards to the negative meniscus of diaphragm, biconvex positive lens and the equivalent prisms of 3CCD, after the 3rd
Fixed lens group is fixed after lens and the 5th after fixed lens, the 4th into the 3rd balsaming lens group, lens and the are fixed after the 6th
Fixed lens group is into the 4th balsaming lens group after seven；Fixed group is a falcate positive lens for bending towards diaphragm before described second,
The second zoom group is a double-concave negative lens, and the second compensation group is a biconvex positive lens, is fixed after described second
Group is fixed lens and formed successively by fixing after lens, the tenth after the 9th to fix behind lens, the 11st to fix behind lens and the 12nd,
Wherein, it is the negative meniscus for bending towards diaphragm to fix lens after the 9th, fixed after the tenth lens backwards to diaphragm falcate just
Lens, the negative meniscus that lens bend towards diaphragm are fixed after the 11st, the falcate that lens bend towards diaphragm is fixed after the 12nd
Negative lens.
The optical system also includes the first speculum and the second speculum, and incident ray is successively through the first speculum and
It is injected into after the reflection of two-mirror on the beam-splitter, first speculum and the second speculum are used for incident ray pressure
Contracting, makes light beam attenuate；First speculum is the parabolic mirror for bending towards object space, and second speculum is backwards to object space
Parabolic mirror.
The technical indicator of the optical system is：Wave band：0.486 μm~0.656 μm of visible light wave range, the μ of infrared band 3.7
M~4.8 μm；Visible ray focal length：690mm is focused, infrared focal length：650mm is focused；F numbers：Visible ray is 4.5, and infrared is 4.
The beam-splitter is saturating visible ray, the beam-splitter for reflecting infrared light, and first speculum and the second speculum are equal
Vertical incidence light is set, the light being injected into successively after the reflection of the first speculum and the second speculum on beam-splitter
In, it is seen that light is vertically injected in visible channel subsystem through beam-splitter, and infrared light injects infrared light after beam-splitter reflects
In passage subsystem.
Between first speculum and the second speculum at intervals of 150mm, second speculum and beam-splitter it
Between at intervals of 40mm；First aperture of a mirror is 160mm, and second aperture of a mirror is 48mm.
The technical indicator of the optical system is：Wave band：0.486 μm~0.656 μm of visible light wave range, the μ of infrared band 3.7
M~4.8 μm；Visible ray focal length：10mm~220mm, infrared focal length：40mm~240mm；F numbers：Visible ray is 4.5, and infrared is 4.
The optical system also includes the 3rd speculum, and the infrared light after beam-splitter light splitting is through the described 3rd reflection
It is injected into after the reflection of mirror in the infrared optical channel subsystem.
In the visible channel subsystem, fixed before first between group and the first zoom group at intervals of 1.5mm~
46.42mm, between the first zoom group and the first compensation group at intervals of 0.5mm~43.58mm, it is solid after the first compensation group and first
Determine between group at intervals of 1.5mm~9.58mm；Fixed before first balsaming lens group and the 3rd between lens at intervals of
0.15mm, fix before the 3rd before lens and the 4th fix between lens at intervals of 0.15mm, first Zoom lens and
Between two balsaming lens groups at intervals of 1.28mm, between the second balsaming lens group and the 4th Zoom lens at intervals of 2.5mm,
Between first offset lens and the second offset lens at intervals of 1.84mm, fixed after first after lens and second fix lens it
Between at intervals of 0.15mm, fixed after second between lens and the 3rd balsaming lens group at intervals of 0.15mm, the 3rd it is glued thoroughly
Between microscope group and the 4th glue lens are charge-coupled at intervals of 17.76mm；It is fixed before described second in the infrared optical channel subsystem
Between group and the second zoom group at intervals of 39.90mm~53.47mm, described in the second zoom group between the second compensation group
At intervals of 2.90mm~45.54mm, fixed after the second compensation group and described second between group at intervals of 2.00mm~
31.00mm；Fixed after described 9th after lens and the tenth fix between lens at intervals of 48mm, fix lens after the described tenth
With the 11st after fix between lens and be provided with the 4th speculum, the emergent light of lens is fixed after the described tenth by the described 4th
Speculum inject the 11st after fix lens, fixed after the described tenth between lens and the 4th speculum at intervals of
58mm, fix after the 4th speculum and the 11st between lens at intervals of 20mm, fix lens and the tenth after the 11st
Fixed after two between lens at intervals of 2.46mm.
The material for each lens fixed before described first in group is followed successively by ZF52, ZK9A, ZK9A, FK61, and described first
The material of each lens in zoom group is followed successively by ZLaF55A, H-LaK1, ZF52, ZLaF3, each in the first compensation group
The material of individual lens is followed successively by ZF52, ZLaF55A, and lens are fixed after fixing first in group after described first to fixation after the 7th
The material of lens is followed successively by ZK9A, QK3, H-LaK1, ZLaF55A, FK61, ZLaF3, ZF3；The material of fixed group before described second
For SILICON, the material of the second zoom group is GMERMANIUM, and the material of the second compensation group is SILICON, described
The material for each lens fixed after second in group is followed successively by GMERMANIUM, SILICON, SILICON, GMERMANIUM.
In visible light/infrared light two waveband optical system provided by the invention, it is seen that optical channel subsystem and infrared light lead to
The lens group not shared between road subsystem, it is separate between two subsystems, two subsystems can each be entered
The corresponding regulation of row, avoid when focal length is adjusted using common zoom group and compensation group, a system imaging of appearance is clear
It is clear, and the situation of another system image blur, be also not in when adjusting again, appearance as the feelings of matter contrast
Condition, so the optical system still accurately can track and measure mesh regardless of the wave band in visible ray in the wave band of infrared light
Mark.
Moreover, using the pattern of the common light path rear end separate imaging of front end Shared aperture, it can realize and be become during short focus using continuous
Target is scanned for Jiao and focal length end is tracked to target, identifies and aimed at.Avoid using visible ray and infrared two points
Vertical focal length heavy caliber system, so as to realize the long-focus of system, miniaturization.
Brief description of the drawings
Fig. 1 is the overall structure diagram of continuous zooming optical system；
Fig. 2 is the partial enlarged drawing of the a-quadrant in Fig. 1；
Fig. 3 is the overall structure diagram for focusing optical system；
Fig. 4 is the partial enlarged drawing of the a-quadrant in Fig. 3；
Transmission function figure when Fig. 5 is visible light wave range f=690mm；
Point range figure when Fig. 6 is visible light wave range f=690mm；
The curvature of field, distortion figure when Fig. 7 is visible light wave range f=690mm；
Transmission function figure when Fig. 8 is infrared band f=650mm；
Point range figure when Fig. 9 is infrared band f=650mm；
The curvature of field, distortion figure when Figure 10 is infrared band f=650mm.
Embodiment
The present invention will be further described in detail below in conjunction with the accompanying drawings.
Continuous zooming optical system embodiment
Optical system as shown in Figure 1, it has two kinds of wave bands, is visible ray and infrared light respectively, so the optical system
System is divided into visible channel subsystem and infrared optical channel subsystem, and a beam-splitter 3 is set in the front end of two subsystems, should
Beam-splitter is saturating visible ray, the beam-splitter for reflecting infrared light.Visible light-transmissive beam-splitter after the beam-splitter 3 light splitting is injected can
See in optical channel subsystem, infrared light is injected after beam-splitter reflects in infrared optical channel subsystem.The two subsystems can
Continuous vari-focus is carried out independently of each other, and there is very big flexible adjustment.
The technical indicator of the optical system is：Wave band：0.486 μm~0.656 μm of visible light wave range, 3.7 μm of infrared band
~4.8 μm；Visible ray focal length：10mm~220mm, infrared focal length：40mm~240mm；F numbers：Visible ray is 4.5, and infrared is 4.
As depicted in figs. 1 and 2, it is seen that the focal power that optical channel subsystem includes sequentially coaxially setting is positive preceding fixation
Group, focal power are negative zoom group, focal power is negative compensation group and focal power is positive latter fixed group, compensation group and rear fixed
Light path between group is provided with iris diaphgram ST, the visible ray subsystem can by the relative motion of zoom group and compensation group come
Realize the continuous vari-focus of the subsystem.First fixed group is made up of four lens, is followed successively by：Fixed before first before lens, second admittedly
Lens are fixed before lens and the 4th are fixed before fix-focus lens, the 3rd, it is the negative meniscus for bending towards diaphragm that lens are fixed before first
4, it is biconvex positive lens 5 to fix lens before second, and it is the falcate positive lens 6 for bending towards diaphragm that lens are fixed before the 3rd, before the 4th
Fixed lens are the falcate positive lens 7 for bending towards diaphragm, and negative meniscus 4 and biconvex positive lens 5 form the first balsaming lens
Group.Zoom group is made up of four lens, is followed successively by：First Zoom lens, the second Zoom lens, the 3rd Zoom lens and the 4th become
Times lens, the first Zoom lens are the negative meniscus 8 for bending towards diaphragm, and the second Zoom lens are biconvex positive lens 9, and the 3rd becomes
Times lens are double-concave negative lens 10, and the 4th Zoom lens are double-concave negative lens 11, and biconvex positive lens 9 and double-concave negative lens 10 form
Second balsaming lens group.Compensation group is made up of two lens, is followed successively by：First offset lens and the second offset lens, first mends
It is the falcate positive lens 12 for bending towards diaphragm to repay lens, and the second offset lens is double-concave negative lens 13.It is saturating by eight that group is fixed afterwards
Microscope group is into being successively：Lens are fixed after first to the 8th, are followed successively by the falcate positive lens 14 for bending towards diaphragm, biconvex positive lens
15, biconvex positive lens 16, double-concave negative lens 17, backwards to the falcate positive lens 18 of diaphragm, backwards to the negative meniscus of diaphragm
19, biconvex positive lens 20 and the equivalent prisms 21 of 3CCD, biconvex positive lens 16, double-concave negative lens 17 and backwards to diaphragm falcate just
Lens 18 form the 3rd balsaming lens group, and negative meniscus 19 and biconvex positive lens 20 composition the 4th backwards to diaphragm is glued thoroughly
Microscope group.
In visible ray subsystem in the present embodiment, first fixed group between zoom group at intervals of 1.5mm~
46.42mm, between zoom group and compensation group at intervals of 0.5mm~43.58mm, between compensation group and rear fixed group at intervals of
1.5mm~9.58mm.Between first balsaming lens group and the falcate positive lens 6 for bending towards diaphragm at intervals of 0.15mm, bent moon
Between shape positive lens 6 and the falcate positive lens 7 for bending towards diaphragm at intervals of 0.15mm, bend towards the negative meniscus 8 of diaphragm
Between the second balsaming lens group at intervals of 1.28mm, between the second balsaming lens group and double-concave negative lens 11 at intervals of
2.5mm, bend towards between the falcate positive lens 12 of diaphragm and double-concave negative lens 13 at intervals of 1.84mm, bend towards the bent moon of diaphragm
Between shape positive lens 14 and biconvex positive lens 15 at intervals of 0.15mm, between the balsaming lens group of biconvex positive lens 15 and the 3rd
At intervals of 0.15mm, the 3rd balsaming lens group and the 4th glue lens it is charge-coupled between at intervals of 17.76mm.
The material of each lens in fixed group is followed successively by ZF52, ZK9A, ZK9A, FK61, each lens in zoom group
Material be followed successively by ZLaF55A, H-LaK1, ZF52, ZLaF3, the materials of each lens in compensation group be followed successively by ZF52,
ZLaF55A, in rear fixed group first after fix lens to the material that lens are fixed after the 7th and be followed successively by ZK9A, QK3, H-
LaK1、ZLaF55A、FK61、ZLaF3、ZF3。
As shown in table 1, one group of design parameter to the visible ray subsystem, unit mm (the sequence number difference in table 1,2 and 3
The label of corresponding each eyeglass).
Table 1
In the present embodiment, on the direction of propagation of incident ray, the beam-splitter 3 is placed with optical axis angle at 45 °, Ran Houfen
A speculum 22 is provided between tabula rasa 3 and infrared light subsystem, the light for the infrared light that the speculum 22 projects with beam-splitter 3
Also angle at 45 ° is placed between axle, so, infrared light is injected into infrared light after the reflection of beam-splitter 3 and speculum 22 successively and led to
In road subsystem, and because beam-splitter 3 and speculum 22 angle at 45 ° with corresponding optical axis are placed, so, it is seen that light, which divides, is
System and infrared light subsystem are finally in a parallel set, and introduce speculum and fold light path, can shorten the length of whole system.
The focal power that the infrared optical channel subsystem includes sequentially coaxially setting is positive first fixed group, focal power is negative
Zoom group, focal power are positive compensation group and focal power is positive latter fixed group, are set in the light path between rear fixed group and image planes
There is diaphragm, this diaphragm overlaps with the cold stop of infrared detector, can realize 100% cold stop efficiency.The infrared light subsystem
The continuous vari-focus of the subsystem can be realized by the relative motion of zoom group and compensation group.Preceding fixed group bends towards light for one
The falcate positive lens 23 of door screen, zoom group is a double-concave negative lens 24, and compensation group is a biconvex positive lens 25, fixes group afterwards
Fixed lens by fixing after lens, the tenth after the 9th to fix behind lens, the 11st to fix behind lens and the 12nd and formed successively, its
In, it is the negative meniscus 26 for bending towards diaphragm that lens are fixed after the 9th, fixed after the tenth lens backwards to diaphragm falcate just
The negative meniscus 29 that lens bend towards diaphragm are fixed after lens the 27, the 11st, fixing lens after the 12nd bends towards the curved of diaphragm
Month shape negative lens 30.
In infrared optical channel subsystem in the present embodiment, first fixed group between zoom group at intervals of 39.90mm
~53.47mm, between zoom group and compensation group at intervals of 2.90mm~45.54mm, between compensation group and rear fixed group between
It is divided into 2.00mm~31.00mm.
Backwards to diaphragm falcate positive lens 27 and bend towards diaphragm negative meniscus 29 between be provided with speculum 28,
The emergent light of falcate positive lens 27 injects negative meniscus 29 by speculum 28.Wherein, the falcate for bending towards diaphragm is born
Lens 26 and between the falcate positive lens 27 of diaphragm at intervals of 48mm, backwards to diaphragm falcate positive lens 27 with it is anti-
Penetrate between mirror 28 at intervals of 58mm, between speculum 28 and negative meniscus 29 at intervals of 20mm, negative meniscus
Between 29 and negative meniscus 30 at intervals of 2.46mm.
The material for bending towards the falcate positive lens 23 of diaphragm is SILICON, and the material of double-concave negative lens 24 is
GMERMANIUM, the material of biconvex positive lens 25 is SILICON, and the material of each lens in rear fixed group is followed successively by
GMERMANIUM、SILICON、SILICON、GMERMANIUM。
As shown in table 2, one group of design parameter of the infrared light subsystem, unit mm are provided.
Table 2
The rear surface of double-concave negative lens 24, bend towards diaphragm negative meniscus 26 preceding surface, bend towards the bent moon of diaphragm
The rear surface of shape negative lens 30 is using aspherical, and the Asphere faces type in the aspherical V softwares using CODE, equation are：
Wherein, c is curvature, and r is the radial coordinate in vertical optical axis direction, and k is conic constant, and A is that quadravalence is aspherical
Coefficient, the rank asphericity coefficients of B six, C are eight rank asphericity coefficients, D is ten rank asphericity coefficients.
One group of above-mentioned several aspherical asphericity coefficient given below.
The asphericity coefficient on the rear surface of lens 24 is：K=1.1134；A=2.6965E-7；B=-4.0543E-10；C
=-1.3258E-13.
The preceding surface asphericity coefficient of lens 26 is：K=-0.95；A=7.21676E-7；B=-3.9905E-10；C=
7.1085E-13。
The rear surface asphericity coefficient of lens 30 is：K=5.95；A=5.1092E-8；B=3.5079E-8；C=-
1.3455E-10。
Focus optical system embodiment
In above-mentioned continuous zooming optical system, it is seen that light subsystem and infrared light subsystem are in continuous vari-focus state.
Two speculums are cut in light path when visible ray subsystem is in focal length 220mm, infrared subsystem is in focal length 240mm,
Now, it is seen that optical band and infrared band are in focal length and focus state.
So the technical indicator for focusing optical system is：Wave band：0.486 μm~0.656 μm of visible light wave range, it is infrared
3.7 μm~4.8 μm of wave band；Visible ray focal length：690mm is focused, infrared focal length：650mm is focused；F numbers：Visible ray is 4.5, infrared
For 4.
Specially：
On the basis of above-mentioned continuous zooming optical system, two speculums, speculum 1 are also set up in the optical system
With speculum 2, as shown in Figures 3 and 4, incident ray is injected on beam-splitter 3 after the reflection of speculum 1 and speculum 2 successively,
The effect of the two speculums is to compress incident ray, light beam is attenuated, and the bore can of such back lens diminishes.
In the present embodiment, speculum 1 is the parabolic mirror for bending towards object space, and speculum 2 is the parabolic backwards to object space
Face speculum, speculum 1 and the equal vertical incidence light of speculum 2 are set, and the base material of the two speculums is stone
English material, reflecting surface plating highly reflecting films.
Between speculum 1 and speculum 2 at intervals of 150mm, between speculum 2 and beam-splitter 3 at intervals of 40mm, and
The bore of speculum 1 is 160mm, and the bore of speculum 2 is 48mm.
As shown in table 3, it is one group of design parameter of speculum 1, speculum 2 and beam-splitter 3, unit mm.
Table 3
| Sequence number | Face type | Radius of curvature | Interval | Material |
| 1 | Parabola | 440.63 | 150 | Quartz |
| 2 | Parabola | 140.63 | 40 | Quartz |
| 3 | Plane | Infinity | 40 | Quartz |
In above-mentioned continuous zooming optical system, speculum 1 and speculum 2 are not provided with, as other embodiments, instead
Penetrate mirror 1 and speculum 2 is just already provided in the continuous vari-focus system in advance, wherein, speculum 2 can be cut and cut from light path
Go out.Speculum 2 is switched in and out by mechanical structure to complete, and a motor driven speculum 2 can be used to move it
Position, moved using motor and belong to routine techniques, no longer repeated here.
When speculum 2 is cut out from light path, the light that is reflected by speculum 1 can not enter rear end subsystem carry out into
Picture, now, speculum 1 and speculum 2 do not work in the optical path, are not involved in the imaging of optical system, it is also assumed that this
Two speculums are not present, and now visible ray and infrared band are in continuous vari-focus state.
It is that focal length 220mm, infrared subsystem are in minimum visual field i.e. focal length when visible ray subsystem is in minimum visual field
During 240mm, zoom group and compensation group in both have been moved into designed extreme position, and now, speculum 2 is cut
In light path, then speculum 1 and speculum 2 simultaneously participate in imaging, it is seen that optical band and infrared band are in focal length and focus state.
The light that principal reflection mirror 1 reflects enters secondary mirror 2, and the light that secondary mirror 2 reflects enters the visible ray point that focal length is 220mm
In system and the infrared subsystem that focal length is 240mm, in this case, principal reflection mirror 1, secondary mirror 2 and focal length are 220mm
The focal length of refractive and reflective optical system of refraction type visible ray subsystem composition be 690mm；Principal reflection mirror 1, secondary mirror 2 and Jiao
The focal length of refractive and reflective optical system away from the infrared subsystem composition of refraction type for 240mm is 650mm.
It is illustrated in figure 5 transmission function figure during visible light wave range f=690mm；When Fig. 6 is visible light wave range f=690mm
Point range figure；The curvature of field, distortion figure when Fig. 7 is visible light wave range f=690mm；Transmission when Fig. 8 is infrared band f=650mm
Functional arrangement；Point range figure when Fig. 9 is infrared band f=650mm；The curvature of field, distortion figure when Figure 10 is infrared band f=650mm.
Specific embodiment is presented above, but the present invention is not limited to described embodiment.The base of the present invention
This thinking is the basic technical indicator of above-mentioned optical system, each in the optical system on the basis of technical indicator is met
The parameter of individual lens is not unique, and the embodiment is merely given as one of which design parameter, to ordinary skill
For personnel, according to the basic ideas of the present invention, design the models of various modifications, parameter and creative labor need not be spent
It is dynamic.The change, modification, replacement and modification carried out without departing from the principles and spirit of the present invention to embodiment still fall
Enter in protection scope of the present invention.
Claims (10)
1. a kind of visible light/infrared light two waveband optical system, including beam-splitter, visible channel subsystem and infrared optical channel
Subsystem, it is characterised in that the visible ray after beam-splitter light splitting inputs to the visible channel subsystem, through described
Infrared light after beam-splitter light splitting inputs to the infrared optical channel subsystem；
The visible channel subsystem include the focal power that sequentially coaxially sets be fix group before positive first, focal power is negative
The first zoom group, focal power is negative the first compensation group and focal power is to fix group, the first compensation group after positive first
And the light path fixed after first between group is provided with the first diaphragm, by the relative motion of the first zoom group and the first compensation group come
Realize the zoom of the visible channel subsystem；The first zoom group is made up of four lens, is followed successively by：First zoom is saturating
Mirror, the second Zoom lens, the 3rd Zoom lens and the 4th Zoom lens, first Zoom lens are the falcate for bending towards diaphragm
Negative lens, the second Zoom lens are biconvex positive lens, and the 3rd Zoom lens are double-concave negative lens, and the 4th Zoom lens are born for concave-concave
Lens, second Zoom lens and the 3rd Zoom lens form the second balsaming lens group；The first compensation group is saturating by two
Microscope group is into being followed successively by：First offset lens and the second offset lens, first offset lens are to bend towards the falcate of diaphragm just
Lens, the second offset lens are double-concave negative lens；
The infrared optical channel subsystem include the focal power that sequentially coaxially sets be fix group before positive second, focal power is negative
The second zoom group, focal power is positive the second compensation group and focal power is that group is fixed after positive second, fixed after described second
Light path between group and image planes is provided with the second diaphragm, by the relative motion of the second zoom group and the second compensation group come real
The now zoom of the infrared optical channel subsystem.
2. visible light/infrared light two waveband optical system according to claim 1, it is characterised in that solid before described first
Determine group to be made up of four lens, be followed successively by：Fixed before first before lens, second before fixing lens, the 3rd and fix lens and the 4th
Preceding fixed lens, it is the negative meniscus for bending towards the diaphragm to fix lens before described first, and it is double that lens are fixed before second
Convex positive lens, it is the falcate positive lens for bending towards diaphragm to fix lens before the 3rd, and it is bend towards diaphragm curved that lens are fixed before the 4th
Month shape positive lens, fixed lens group is fixed before lens and second before described first into the first balsaming lens group；It is solid after described first
Determine group to be made up of eight lens, be successively：Lens are fixed after first to the 8th, fixing lens after the described first to the 8th is followed successively by
Bend towards the falcate positive lens of diaphragm, biconvex positive lens, biconvex positive lens, double-concave negative lens, the falcate backwards to diaphragm is just saturating
Mirror, backwards to the negative meniscus of diaphragm, biconvex positive lens and the equivalent prisms of 3CCD, fix after the 3rd fixed after lens, the 4th
Fixed lens group is into the 3rd balsaming lens group after lens and the 5th, and fixed lens group is fixed after lens and the 7th after the 6th into the 4th
Balsaming lens group；
Fixed group is a falcate positive lens for bending towards diaphragm before described second, and the second zoom group is that a concave-concave is negative saturating
Mirror, the second compensation group are a biconvex positive lens, and it is fixed after lens, the tenth by fixing after the 9th that group is fixed after described second
Fixed behind lens, the 11st behind lens and the 12nd and fix lens and form successively, wherein, lens are fixed after the 9th to bend towards diaphragm
Negative meniscus, fix falcate positive lens of the lens backwards to diaphragm after the tenth, fixing lens after the 11st bends towards diaphragm
Negative meniscus, fix the negative meniscus that lens bend towards diaphragm after the 12nd.
3. visible light/infrared light two waveband optical system according to claim 2, it is characterised in that the optical system
Also include the first speculum and the second speculum, incident ray is injected after the reflection of the first speculum and the second speculum successively
Onto the beam-splitter, first speculum and the second speculum are used to compress incident ray, light beam is attenuated；Described
One speculum is the parabolic mirror for bending towards object space, and second speculum is the parabolic mirror backwards to object space.
4. visible light/infrared light two waveband optical system according to claim 3, it is characterised in that the optical system
Technical indicator be：Wave band：0.486 μm~0.656 μm of visible light wave range, 3.7 μm~4.8 μm of infrared band；Visible ray focal length：
690mm is focused, infrared focal length：650mm is focused；F numbers：Visible ray is 4.5, and infrared is 4.
5. visible light/infrared light two waveband optical system according to claim 4, it is characterised in that the beam-splitter is
Saturating visible ray, the beam-splitter for reflecting infrared light, the equal vertical incidence light of first speculum and the second speculum is set, described
It is injected into successively after the reflection of the first speculum and the second speculum in the light on beam-splitter, it is seen that light is vertical through beam-splitter
Inject in visible channel subsystem, infrared light is injected after beam-splitter reflects in infrared optical channel subsystem.
6. visible light/infrared light two waveband optical system according to claim 5, it is characterised in that first reflection
Between mirror and the second speculum at intervals of 150mm, between second speculum and beam-splitter at intervals of 40mm；Described
One aperture of a mirror is 160mm, and second aperture of a mirror is 48mm.
7. visible light/infrared light two waveband optical system according to claim 2, it is characterised in that the optical system
Technical indicator be：Wave band：0.486 μm~0.656 μm of visible light wave range, 3.7 μm~4.8 μm of infrared band；Visible ray focal length：
10mm~220mm, infrared focal length：40mm~240mm；F numbers：Visible ray is 4.5, and infrared is 4.
8. the visible light/infrared light two waveband optical system according to claim 4 or 7, it is characterised in that the optical system
System also includes the 3rd speculum, and the infrared light after beam-splitter light splitting is injected into institute after the reflection of the 3rd speculum
State in infrared optical channel subsystem.
9. visible light/infrared light two waveband optical system according to claim 8, it is characterised in that the visible ray leads to
Fixed in road subsystem, before first between group and the first zoom group at intervals of 1.5mm~46.42mm, the first zoom group and the
Between one compensation group at intervals of 0.5mm~43.58mm, fixed after the first compensation group and first between group at intervals of 1.5mm
~9.58mm；Fixed before first balsaming lens group and the 3rd between lens at intervals of 0.15mm, fix lens and before the 3rd
Fixed before four between lens at intervals of 0.15mm, between first Zoom lens and the second balsaming lens group at intervals of
1.28mm, it is saturating at intervals of 2.5mm, the first offset lens and the second compensation between the second balsaming lens group and the 4th Zoom lens
Between mirror at intervals of 1.84mm, fixed after first after lens and second fix between lens at intervals of 0.15mm, after second
Between fixed lens and the 3rd balsaming lens group at intervals of 0.15mm, the 3rd balsaming lens group and the 4th glue lens it is charge-coupled between
At intervals of 17.76mm；
In the infrared optical channel subsystem, fixed before described second between group and the second zoom group at intervals of 39.90mm~
53.47mm, being mended at intervals of 2.90mm~45.54mm, described second between the second compensation group described in the second zoom group
Repay fix after group and described second between group at intervals of 2.00mm~31.00mm；After lens and the tenth being fixed after described 9th
Between fixed lens at intervals of 48mm, fixed after the described tenth behind lens and the 11st and fix between lens that to be provided with the 4th anti-
Mirror is penetrated, the emergent lights of lens is fixed after the described tenth is injected by the 4th speculum after the 11st and fix lens, described the
Fixed after ten between lens and the 4th speculum at intervals of 58mm, fix lens after the 4th speculum and the 11st
Between at intervals of 20mm, fixed after the 11st behind lens and the 12nd fix between lens at intervals of 2.46mm.
10. visible light/infrared light two waveband optical system according to claim 9, it is characterised in that solid before described first
The material for determining each lens in group is followed successively by ZF52, ZK9A, ZK9A, FK61, each lens in the first zoom group
Material is followed successively by ZLaF55A, H-LaK1, ZF52, ZLaF3, and the material of each lens in the first compensation group is followed successively by
ZF52, ZLaF55A, fix after first in group after described first and fix lens to the material that lens are fixed after the 7th and be followed successively by
ZK9A、QK3、H-LaK1、ZLaF55A、FK61、ZLaF3、ZF3；The material of fixed group is SILICON before described second, described the
The material of two zoom groups is GMERMANIUM, and the material of the second compensation group is SILICON, is fixed after described second in group
The material of each lens is followed successively by GMERMANIUM, SILICON, SILICON, GMERMANIUM.
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| CN106019544B (en) * | 2016-06-27 | 2018-07-10 | 湖北久之洋红外系统股份有限公司 | A kind of refrigeration mode two-waveband infrared optical system |
| CN107920188A (en) * | 2016-10-08 | 2018-04-17 | 杭州海康威视数字技术股份有限公司 | A kind of camera lens and video camera |
| CN108152973B (en) * | 2017-12-13 | 2020-07-17 | 北京华航无线电测量研究所 | Visible light and medium wave infrared common-caliber composite optical system |
| CN108594411B (en) * | 2018-06-04 | 2023-06-02 | 凯迈（洛阳）测控有限公司 | Long-focus, large-caliber and multi-view-field medium-wave infrared optical system |
| CN108924388A (en) * | 2018-06-21 | 2018-11-30 | 殷创科技（上海）有限公司 | Sense fusing device and the camera including sensing fusing device |
| CN111751915B (en) * | 2020-06-27 | 2021-05-11 | 同济大学 | Compact infrared viewfinder optical system based on free-form surface prism |
| CN113805325A (en) * | 2021-09-17 | 2021-12-17 | 航天科工微电子系统研究院有限公司 | Long-focus large-view-field miniaturized active athermal optical system |
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| CN101866054A (en) * | 2010-06-03 | 2010-10-20 | 中国科学院长春光学精密机械与物理研究所 | Optical system of multispectral area array CCD (Charge Coupled Device) imager |
| CN103278927A (en) * | 2013-06-21 | 2013-09-04 | 西安工业大学 | Two-waveband hole-diameter-shared light-path-shared zoom-shared imaging optical system |
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| US20110051229A1 (en) * | 2009-08-25 | 2011-03-03 | StingRay Optics, LLC | Achromatic visible to far infrared objective lens |
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| CN101866054A (en) * | 2010-06-03 | 2010-10-20 | 中国科学院长春光学精密机械与物理研究所 | Optical system of multispectral area array CCD (Charge Coupled Device) imager |
| CN103278927A (en) * | 2013-06-21 | 2013-09-04 | 西安工业大学 | Two-waveband hole-diameter-shared light-path-shared zoom-shared imaging optical system |
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